CN101872313B - Method for developing intelligent control-oriented virtual instrument capable of reconfiguring functions - Google Patents

Abstract

The invention discloses a method for developing a function-recombinable intelligent controllable virtual instrument, which is carried out according to the following steps: (1) requirement analysis, establishment of a development system framework mode, design of a development blueprint for a development system, and establishment of a system development plan; (2) Establish instrument resource library; (3) establish functional configuration model, and build instruments; (4) establish general data acquisition and management module; (5) establish simple and efficient development mode; (6) establish integration with other systems (7) Establish a system network interface based on code transmission. Significant effect: Build a template, transfer the template to the system building field, and make appropriate modifications to the module to become a special instrument. It is easy to use, meets the needs of the public, and improves the efficiency of research and development.

Description

Method for developing functional reconfigurable intelligent controllable virtual instrument

technical field

The invention belongs to the field of test instrument development systems, and in particular relates to a method for developing function reconfigurable intelligent control virtual instruments.

Background technique

The development of testing and measuring instruments can be roughly divided into three stages: the first stage is the traditional hardware instrument, the second stage is the popular virtual instrument with software as the main body, and the third stage is the intelligent control virtual instrument. Intelligent control-based virtual instruments are divided into two categories according to their essential characteristics: one is a graphical development environment represented by LabVIEW, also known as G language; the other is an object-oriented visual text development environment represented by VC. Graphical development environment has won a wide range of applications for its remarkable ease of use and specialization.

No matter what kind of virtual instrument developed by the development system, its core component is software. In the development system, the panels, controls, displays, etc. of traditional hardware instruments can be intuitively displayed on the computer screen through software programming. Once virtual instruments are formed, users can use them in the same way as traditional test instruments. Although the virtual instrument implements software to the traditional hardware instrument, it has many advantages and characteristics that the traditional hardware instrument cannot have, but in the structure of the instrument, in the relationship between the function of the instrument and the panel control, the virtual instrument It is still consistent with traditional hardware instruments, especially because the "user design" cannot be avoided when assembling virtual instruments, so every user of virtual instruments must have the ability to design and assemble virtual instruments by themselves. To, and the research and development efficiency of virtual instrument is low.

The disadvantage of the existing technology is that the "user design" cannot be avoided, and every virtual instrument user must have the ability to design and build virtual instruments by himself. Not only is it difficult to do, but also the research and development efficiency of virtual instruments is low.

Contents of the invention

The purpose of the present invention is to provide a method for developing a function-reorganized intelligent control virtual instrument. Based on this method, users can modify, add or delete instrument functions and instrument structures at any time.

In order to achieve the above object, the present invention describes a method for developing a functionally reconfigurable intelligent control virtual instrument, the key of which is: proceed as follows:

Step 1 needs analysis, establishment of the development system architecture model, design of the development blueprint of the development system, and establishment of a system development plan, which mainly includes:

①Determine the components of the development system. The components of the development system are composed of a control library, a function library, a data pool, a building field, sensors, and a data collector; the sensors and data collectors collect data and store them in the data pool, Two-way data transmission between the data pool and the building field, the output end of the function library is connected to the first input end of the building field, and the output end of the control library is connected to the second input end of the building field. On-site assembly of the finished instrument.

The construction field extracts the instrument panel controls and instrument test functions in the control library and function library, receives data from the data collector and sensors, and the construction field also communicates with the data pool two-way, completes the instrument assembly in the construction field, and designs the instrument finished product.

② Determine the development system structure; the development system structure is composed of configuration system, operation system, configuration database and system resources, and any two of the configuration system, operation system, configuration database and system resources are bidirectionally communicated.

③Establish a dual-drive mechanism for the development system; the development system adopts an event-driven and data-flow-driven dual-drive mechanism. The event-driven is mainly used for user interaction and system control; the data-flow-driven is mainly used for function execution and result display.

④ Establish a five-element development model of the development system, which divides the development system into five parts: user operation module, data acquisition module, data processing and control module, result output module, system maintenance and self-test module; The user operation module respectively controls the data acquisition module, data processing and control module, result output module, maintenance and self-test module, the data acquisition module acquires data and transmits the data to the data processing and control module, and the data processing and control module The module processes data and transmits the data to the result output module. The system maintenance and self-test module is provided with an output terminal which is respectively connected to the maintenance and self-test input of the user operation module, data acquisition module, data processing and control module, and result output module. terminal connection;

The data acquisition interface provides a function selection interface, a control selection interface, a data selection interface, and an instrument loading interface. Operations such as instrument attribute configuration and instrument deletion realize the sequence control and data transmission control between basic functions; the result output interface is used to output intelligent virtual controls, control virtual instruments and save the instruments to the instrument library; the system self-test and diagnosis module realizes The detection and diagnosis of the state of the system development process realizes the detection and diagnosis of the state of each function interface and data matching in the function configuration development process; the user operation interface realizes the interaction between the user and the system and controls and coordinates the operation of the other four modules. The five-element development model provides a powerful theoretical basis for the efficient and rapid development of virtual instruments.

Step 2. Build an instrument resource library, and the instrument resources are inherited in the system in the form of function library, virtual control library, and data pool;

The process of inheritance is the process of mathematical modeling, algorithm design and software implementation of instrument functions and controls one by one;

A variety of non-intelligent virtual controls are integrated in the virtual control library, mainly including: selector switch, button, knob, toggle switch, dial, digital tube, slider, dial signal light, 2D/3D display, label, etc. The appearance of the control can be changed by modifying the properties of the control. The function library integrates the basic function library and the expert instrument library. The functions in the basic function library are divided into data acquisition simulation access, time domain analysis, statistical analysis, frequency domain analysis, window function, Filtering and demodulation, fitting and interpolation, basic mathematical operations, auxiliary tools, display settings, advanced signal processing, a total of 11 categories; the expert function library is a function library for the integration of various "instruments", with strong scalability, The existing system includes: vibration signal analyzer, order ratio analyzer, and acoustic vibration analyzer; the data pool contains data during development and configuration and data during operation.

Step 3. Establish a functional configuration model, assemble and save the instrument, including:

① Functional configuration configuration;

That is, the "building block" assembly of functions. A certain function of a virtual instrument is generally the result of the sequential execution of one or more basic analysis methods. In different places of use and different test objects, specific analysis functions need to be used. The virtual instrument The power of the development system is actually reflected in the functions and configuration configuration, that is, the "building block" assembly of functions.

②In the development system, assemble the functional modules and data pools into virtual instruments with complete instrument functions and save them;

Step 4. Establish general data acquisition and management modules, including:

①The acquisition assistant module realizes the transparency of the underlying hardware, and its implementation steps are as follows:

(1) Bundle self-developed adjustment, acquisition and other hardware systems; hardware systems include PCI acquisition cards, USB acquisition cards, etc.

(2) Use the dynamic library provided by the user to support other forms of collectors.

Data is the basis of test analysis and the direct expression of test results. Therefore, data plays an extremely important role in the test and measurement system and is an important part of the test instrument. In the traditional virtual instrument development process, developers need to assemble acquisition cards, Regulate the underlying hardware such as circuits, which greatly reduces the development efficiency of virtual instruments. This system adopts the acquisition assistant module to realize the transparency of the underlying hardware. According to the management module, the data in the system can be viewed, added, deleted and modified, which improves the development efficiency. .

The intelligent control-based virtual instrument development system has established a complete data acquisition and management system. The system includes a collection assistant and a unified data management platform. The acquisition assistant helps users configure various acquisition information, including: setting the number of channels and channel number, sensor sensitivity and engineering unit setting of each channel, sampling method setting, sampling length setting, sampling frequency setting, acquisition card type selection and preview acquisition signal and other functions. The unified data management platform provides a platform for users to observe, increase, decrease, and modify the data of the current system. Users can add different types and lengths of system global data through this platform; modify the data type, data length, initial value, variable prompt description, etc.

(3) Unify the data management platform, so that the data can be generalized among various instruments. This helps to improve development efficiency.

Step 5. Establish a simple and efficient development model, including:

①Template development mode;

The user transfers the template into the system building field through keyword search, and makes appropriate modifications to the module to become a special instrument, which improves the development efficiency;

The development efficiency of the virtual instrument development platform is an important criterion to measure the performance of the development system. The template development mode provided by the system greatly improves the development efficiency of virtual instruments. Before developing a new instrument, the user can view the existing templates in the system, call out the corresponding template, and add, subtract or modify it on the basis of this template to form a new instrument that meets the test and measurement requirements. So that each instrument development process does not need to start from "zero". This system provides template development methods. Users do not need to have the ability to design and build virtual instruments by themselves. Appropriate modification will become a special instrument, and the template is also a good learning example for users who use this system for the first time; newly developed instruments can also be saved as templates for further use. The template adopts a layered storage and retrieval mechanism, and each layer of templates can eventually form an instrument library in a dedicated instrument field.

②Intelligent development mode;

The intelligent development mode is to establish a system rule set through the predefined rules in the system and the rules mined in the use process; when the user develops a certain test instrument, he inputs the requirements for the function and performance of the instrument, and the system gradually develops the system according to the rules of the rule set. Users provide a variety of construction suggestions; the suggestion can be an intelligent virtual control or a certain function or even a formed instrument; the user can accept the system's navigation suggestions, modify or reject the navigation prompts.

Step 6. The interaction mechanism with other systems calls third-party functions developed by users, which are provided in two ways:

①The function is provided in the form of a dynamic link library; the ability to interact with other systems reflects the openness and flexibility of the system. The intelligent control virtual instrument development system provides an interface for calling the dynamic link library, and can call various programming such as Visual C++ The dynamic link library generated by the platform.

② The function is provided in the form of text conforming to the syntax of C language.

The intelligent control-based virtual instrument development system provides a link compilation module for text files conforming to the C language standard, which can directly add the instrument functions realized by the C language to the system; by calling, the user can use the test analysis algorithm written by the user in the test instrument.

Step 7, establishing a system network interface based on code transmission;

The network interface of the system extends the application range of the virtual instrument to the entire Internet/Intranet network, which integrates signal collection, transmission and processing. On the one hand, many expensive hardware resources are shared, and on the other hand, it is convenient for the expansion of the test system. Networked virtual instruments have been widely used in remote testing, fault diagnosis, remote control and remote teaching.

In step 2, the component instrument function library, the virtual control library, and the data pool are established;

Wherein the establishment of the function library, its main steps are:

(1) Modeling, algorithm design and software implementation of instrument functions and basic analysis methods in the field of test and analysis instruments as much as possible;

(2) Carry out modular decomposition of these functions according to the analysis method and instrument field. The module decomposition results should ensure that the modular decomposition of the system and the connection and combination process of the modules are easy to carry out, and at the same time, the deletion and insertion of any module can not be given The combination process of other modules has an impact;

(3) Model the development and storage of user-defined functions based on function reorganization; the reorganization of one or more basic functions finally forms a custom function with the same interface and calling method as the basic function. Once the custom function is developed, Can be repeated many times for use in different instruments.

(4) Integrate the functional modules formed by the above (2) and (3) in an orderly manner in the system to form a basic function library, an expert instrument library and a custom function library, so as to facilitate the search, selection and call of functions, and improve improved R&D efficiency;

In the establishment of the virtual control library, the control library contains various non-intelligent virtual controls, and its main steps are:

(1) Various controls are modeled, and the software realizes computer expression. Like traditional controls, controls have various appearance attributes; controls correspond to functions of traditional physical controls one by one, and have the same appearance.

(2) Classify various controls into functional controls, data controls and display controls;

Functional controls, data controls, and display controls use different methods to communicate with the function library and data pool, but they have a unified call interface, and they can be transformed into each other under certain conditions, such as converting functional controls into data controls.

(3) Store the completed non-intelligent virtual control in the library, and use it as a carrier for function endowment;

Non-intelligent controls form intelligent virtual controls through functional configuration, and intelligent virtual controls are the basic components of intelligent control-based virtual instruments.

The establishment of the data pool, the data pool is the container responsible for data sending and receiving and updating in the system, and the main steps of its establishment are:

(1) Establish the structure and storage method of data in the data pool;

The data structure includes various information, such as: data name, data description information, data memory length, data actual length, data type, data address, data initial value, and the like. A structure containing all information is established for each data node in the system, and each data node structure is saved in the form of a linked list. Save the linked list as a system data file when the system exits. The data is transparent to different instruments or different functions developed by the development system.

(2) Establish a mechanism to dynamically increase or decrease the capacity of the data pool to meet the needs of the instrument, and create a unified data input and output port;

(3) Establish the saving and reloading mechanism of the data pool.

In the establishment of the functional configuration model described in step ① of step 3, the functional configuration configuration is performed according to the following steps:

(1) Select the event that triggers the configuration function;

(2) Select the function "given" from the function library to the event selected in (1);

(3) Data sources and parameters of configuration functions;

(4) Steps (2) and (3) are repeated to assign multiple functions, and the output of the previous function becomes the input of the next function;

(5) Adjust the order of functions and delete unnecessary functions;

(6) Integrate multiple functions of the event to form a complete test function with the same interface, call and execution mode as the basic functions in the function library;

(7) Name and save the new function.

In the development system, the functional modules and data pools are assembled into a virtual instrument with complete instrument functions. The process of function configuration and configuration refers to "giving" one or more functions to an interface of the control in an orderly manner, and "activating" it In the whole process of becoming a smart control, configuring the parameters of each sub-function and combining multiple smart controls into a test instrument, the controls and functions have a common interface, that is, different functions can be "given" to the same control interface, Different control interfaces can accept the same function; through configuration and configuration, test functions or test instruments that meet various specific test requirements can be formed. The establishment process of the configuration model also adopts the five-element development model.

The steps to assemble into a virtual instrument are:

(1) Select a suitable non-intelligent virtual control from the non-intelligent virtual control library;

(2) Carry out corresponding attribute setting to the selected non-intelligent virtual control;

(3) Assign functions to the selected non-intelligent virtual controls;

(4) Perform data configuration on functions and controls;

(5) Test and integrate the selected non-intelligent virtual controls, that is, self-inspect the manufactured intelligent virtual controls, and check whether the functions in the controls are assigned correctly and meet the performance and accuracy requirements;

(6) Trial run the assembled virtual instrument, check whether there is any error or software conflict, and save the correct virtual instrument; set the corresponding properties of the non-intelligent virtual control, and assign functions, and configure data for functions and controls , make a virtual instrument and save the virtual instrument.

The establishment of the simple and efficient development model described in step 5 includes:

①Template development mode, its main steps are:

(1) Pre-defined templates, which summarize commonly used virtual instruments or test analysis functions, and create a limited number of templates for them to be stored in the system;

(2) Establish keyword template retrieval mechanism for the system;

(3) Template loading;

(4) The assembled instrument is stored in the system as a template;

The instrument built by the developer in advance is stored in the system as a template, and the user calls the template, so that the user does not need to design and build a virtual instrument by himself. The majority of users do not need to design their own as much as possible. They only need to call the template and modify the parameters of the virtual instrument according to the test function that needs to be completed. , high efficiency, to meet the needs of the majority of users.

②Intelligent development model, its main steps are:

(1) Establish a facet classification and facet retrieval mechanism for instrument resources;

Due to the huge number of test instruments, controls and functions in the development system, they need to be classified and then integrated in an orderly manner. The facet classification method puts keywords in a certain context, and classifies components from different facets that reflect the essential characteristics of instrument resources. This classification method has strong description ability and description accuracy for various resources. After using the facet taxonomy to describe the instrument resources, when the system uses these resources, it needs to use facet retrieval to realize the call of the instrument resources.

Calculate the facet value of the resource when the instrument resource is put into the warehouse; establish the facet value vector space; use the cluster analysis algorithm to classify all documents and build a cluster index tree. During instrument resource retrieval, facet values are divided according to user input information. Facet values can be words, phrases, sentences, or documents; a retrieval vector set is established according to a certain facet value; local traversal in the clustering index tree is performed through similarity calculation; calculation The instrument resource with the greatest similarity to the search vector set is obtained, and the search ends.

(2) Establish a rule set based on knowledge discovery;

The rule set based on knowledge discovery can improve the intelligence of the development system. It mines the association regulation of each resource in the system from the instrument built by the user to form its own knowledge base, and finally uses its own knowledge base to build a more reasonable virtual system. instrument.

(3) Establish rule classification management;

The development system will generate a large number of relational rules in the process of use. A large number of relational rules are conducive to the intelligent creation of virtual instruments in the system, but too many relational rules will affect the efficiency of new instrument generation. Therefore, the development system adopts cluster analysis methods and The structural features of the rules themselves group rules efficiently.

(4) Establish a neural network decision-making center.

The neural network is an information processing system based on imitating the structure and function of the human brain neural network. It has a high degree of non-linearity and self-learning and self-adaptive capabilities. In this system, the neural network is trained with a priori building examples. First, the sample input is calculated forward according to the learning algorithm of the network, and then the error between the output of the network and the expected output is compared at each moment. When the error reaches When the specified accuracy is required, the training is stopped and the weights of each layer of the network are saved for use when the virtual instrument is generated.

According to the functional performance requirements of the instrument, the instrument development is completed according to the system navigation suggestion. The knowledge-based navigation development not only makes the development process intelligent and simple, but also enables the user to understand the general process of virtual instrument development, the relationship between functions and the structure of the instrument. .

Establish an interaction mechanism with other systems as described in step 6, call the third-party function developed by the user, the function in step ① is provided in the form of a dynamic link library, and the basic steps are:

(1) Select the dynamic link library that needs to be transferred;

(2) automatically identify the function interface in the dynamic link library;

(3) Configure the parameter type and form of the interface function;

(4) Perform instrument function configuration as part of the function library.

The function of the second step is provided in the form of text conforming to the syntax of C language, and its basic steps are:

(1) Read the text file;

(2) Check the grammatical correctness in the file;

(3) compile and load into the system;

(4) Form a system standard unified functional interface;

(5) Perform instrument function configuration as part of the function library.

The third-party functions called by the above two methods can be integrated in the system as part of the system function library, or called as independent functional units during instrument development and operation.

The establishment of a system network interface based on code transmission as described in step 7, the main steps are:

(1) Three-way handshake identity authentication;

(2) The server searches the user information database, the function code table, and returns the function number and description, controls and user manuals that the client is authorized to use;

(3) The client refers to the user manual and uses the authorized functions to build the instrument and assign functions;

(4) Request the server to verify the correctness of the assembly;

(5) The server searches for the function code list and function library according to the building rules, and checks the building equipment of the client;

(6) Return the server-side inspection result;

(7) The server searches the function library, and transmits the corresponding processing code to the client.

The network interface of the system makes remote data collection and control, remote real-time calling of measuring instrument and equipment resources, and remote equipment fault diagnosis possible. At the same time, the software resources of the development system, such as functions and controls, are distributed anywhere on the network and can be conveniently and flexibly invoked.

The remarkable effect of the present invention is: to build a template, transfer the template to the system building field, make appropriate modifications to the module to become a special instrument, easy to use, meet the needs of the public, and improve the efficiency of research and development.

Description of drawings

Fig. 1 is the flow chart of the method steps of virtual instrument development;

Figure 2 is a block diagram of the principle of the development system;

Fig. 3 is a schematic diagram of the development system structure;

Fig. 4 is a principle block diagram of the five-element development model;

Fig. 5 is a flow chart of the function configuration configuration method;

Fig. 6 is the development system interface of the present invention;

Figure 7 is the interface diagram of the built vibration signal analyzer.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 4, a method for developing a functionally reconfigurable intelligent controllable virtual instrument is performed according to the following steps:

Step 1. Establish the development system architecture model, design the development blueprint of the development system, and establish a system development plan, which mainly includes:

①Determine the components of the development system. The components of the development system are composed of a control library, a function library, a data pool, a building field, sensors, and a data collector; the sensors and data collectors collect data and store them in the data pool, Two-way data transmission between the data pool and the building field, the output end of the function library is connected to the first input end of the building field, and the output end of the control library is connected to the second input end of the building field. On-site assembly of finished instruments;

② Determine the development system structure, the development system structure is composed of configuration system, operation system, configuration database and system resources, and any two of the configuration system, operation system, configuration database and system resources are bidirectionally communicated;

③Establish a dual-drive mechanism for the development system. The development system adopts an event-driven and data-flow-driven dual-drive mechanism. The event-driven is mainly used for user interaction and system control, and the data-flow driven is mainly used for function execution and result display.

④Establish the five-element development model of the development system;

The five-element development model of the development system divides the development system into five parts: user operation module, data acquisition module, data processing and control module, result output module, system maintenance and self-test module; the user operation module respectively controls the data acquisition module, data processing and control module, result output module, maintenance and self-test module, the data acquisition module acquires data and transmits the data to the data processing and control module, the data processing and control module processes the data, and transmits the data to the result The output module, the system maintenance and self-test module are provided with output terminals respectively connected to the maintenance and self-test input terminals of the user operation module, data acquisition module, data processing and control module, and result output module;

Step 2. Build an instrument resource library. Instrument resources are integrated into the system in the form of function library, virtual control library, and data pool.

Step 3. Establish a functional configuration model and assemble the instrument, including:

① Functional configuration configuration;

②Assemble functional modules and data pools into a virtual instrument with complete instrument functions in the development system;

Step 4. Establish general data acquisition and management modules, including:

①The acquisition assistant module realizes the transparency of the underlying hardware, and its implementation steps are as follows:

(1) Bundle self-developed adjustment, acquisition and other hardware systems;

(2) Use the dynamic library provided by the user to support other forms of collectors;

(3) Unify the data management platform, so that the data can be generalized among various instruments.

Step 5. Establish a simple and efficient development model, including:

①Template development mode;

②Intelligent development mode;

Step 6. Establish an interaction mechanism with other systems and call third-party functions developed by users, including:

① The function is provided in the form of a dynamic link library;

② The function is provided in the form of text conforming to the syntax of C language.

Step 7, establishing a system network interface based on code transmission.

In step 2, the component instrument function library, the virtual control library, and the data pool are established;

Wherein the establishment of the function library, its main steps are:

(1) Modeling, algorithm design and software implementation of instrument functions and basic analysis methods in the field of test and analysis instruments as much as possible;

(2) Decompose these functions into modules according to analytical methods and instrument fields;

(3) Modeling the development and storage of user-defined functions based on function reorganization;

(4) Integrate the functional modules formed in the above (2) and (3) in an orderly manner in the system to form a basic function library, an expert instrument library and a custom function library, so as to facilitate the search, selection and call of functions;

In the establishment of the virtual control library, the control library contains various non-intelligent virtual controls, and its main steps are:

(1) Model various controls, and the software realizes computer expression, which, like traditional controls, has various appearance attributes;

(2) Classify various controls into three types of controls: functional controls, data controls and display controls;

(3) Store the completed non-intelligent virtual control in the library, and use it as a carrier for function assignment.

The establishment of the data pool, the data pool is the container responsible for data sending and receiving and updating in the system, and the main steps of its establishment are:

(1) Establish the structure and storage method of data in the data pool;

The data structure includes various information, such as: data name, data description information, data memory length, data actual length, data type, data address, data initial value, and the like. A structure containing all information is established for each data node in the system, and each data node structure is saved in the form of a linked list. Save the linked list as a system data file when the system exits. The data is transparent to different instruments or different functions developed by the system.

(2) Establish a mechanism to dynamically increase or decrease the capacity of the data pool to meet the needs of the instrument, and create a unified data input and output port;

(3) Establish the saving and reloading mechanism of the data pool.

As shown in Figure 5, in the establishment of the functional configuration model described in step ① in step 3, the functional configuration configuration is performed according to the following steps:

(1) Select the event that triggers the configuration function;

(2) Select the function "given" from the function library to the event selected in (1);

(3) Data sources and parameters of configuration functions;

(4) Steps (2) and (3) are repeated to assign multiple functions, and the output of the previous function becomes the input of the next function;

(5) Adjust the order of functions and delete unnecessary functions;

(6) Integrate multiple functions of the event to form a complete test function with the same interface, call and execution mode as the basic functions in the function library;

(7) Name and save the new function.

Establish a simple and efficient development model as described in step 5, including:

①Template development mode, its main steps are:

(1) Pre-defined templates, which summarize commonly used virtual instruments or test analysis functions, and create a limited number of templates for them to be stored in the system;

(2) Establish keyword template retrieval mechanism for the system;

(3) Template loading;

(4) The assembled instrument is stored in the system as a template.

②Intelligent development model, its main steps are:

(1) Establish a facet classification and facet retrieval mechanism for instrument resources;

(2) Establish a rule set based on knowledge discovery;

(3) Establish rule classification management;

(4) Establish a neural network decision-making center.

Establish an interaction mechanism with other systems as described in step 6, and call third-party functions developed by users, including:

① The function is provided in the form of a dynamic link library, and its basic steps are:

(1) Select the dynamic link library that needs to be transferred;

(2) automatically identify the function interface in the dynamic link library;

(3) Configure the parameter type and form of the interface function;

(4) Perform instrument function configuration as part of the function library.

②The function is provided in the form of C language grammar text, and its basic steps are:

(1) Read the text file;

(2) Check the grammatical correctness in the file;

(3) compile and load into the system;

(4) Form a system standard unified functional interface;

5) Perform instrument function configuration as part of the function library.

The establishment of a system network interface based on code transmission as described in step 7, the main steps are:

(1) Three-way handshake identity authentication;

(2) The server searches the user information database, the function code table, and returns the function number and description, controls and user manuals that the client is authorized to use;

(3) The client refers to the user manual and uses the authorized functions to build the instrument and assign functions;

(4) Request the server to check the correctness of the assembly;

(5) The server searches for the function code list and function library according to the building rules, and checks the building equipment of the client;

(6) Return the server-side inspection result;

(7) The server searches the function library, and transmits the corresponding processing code to the client.

The following example is the steps for the user to use this system to develop a vibration signal analyzer (as shown in Figure 6 and Figure 7):

(1) The client logs in to the server and obtains the corresponding authorization information;

(2) Input the characteristics of the virtual instrument to be developed into the development system on the client side. Set up the request edit box to search;

(3) According to the requirements of the client, the neural network decision-making center provides the relevant instrument function number and description information of the control and the user manual. The functions given by the vibration signal analyzer in this example mainly include acquisition, time-domain feature analysis, probability density, AC and DC estimation, amplitude-phase spectrum, cross-spectrum amplitude-phase analysis, transfer function, impulse response, IIR filtering, FIR filtering, Demodulate and refine the amplitude spectrum, etc.; the given controls mainly include: buttons, selection switches, display controls, etc.;

(4) The user selects the appropriate non-intelligent control and configures the corresponding instrument functions, such as: select the button to "endow" functions such as acquisition, filtering, and time-domain eigenvalue analysis, and select the selection switch to "endow" the phase spectrum at the same time , self-power spectrum, cross-spectrum amplitude-phase analysis, transfer function or impulse response, etc., choose the intuitive display function in real space to display the execution results, such as selecting the digital tube or dial to display the output AC component value, DC component value, etc., and choosing 2D display to display Amplitude spectrum, spectral lines output from power spectrum, etc.;

(5) The client can directly call the third-party function in the local computer, and assign the third-party function to the non-smart control. In this example, the client user calls the Hilbert demodulation function in the external dynamic library instead of the demodulation function provided by the server. .

(6) If it is necessary to add a window before executing the phase spectrum, it is necessary to configure the combination function, that is, configure the windowing function and the phase spectrum function to a single interface of the control, and configure the parameters of each function;

(7) Assemble the configured intelligent virtual controls into a complete virtual instrument to form a configuration file.

(8) The client sends the configuration file to the server to check the correctness of the instrument assembly;

(9) After the server confirms that the configuration is correct, it searches the server function library, and transmits the corresponding processing code to the client, and the client automatically performs function fusion, so that the control has real instrument functions and can be used for ready-made tests.

(10) The server saves the viewing interface of the client interface, and can check the operation status of the client instrument and the analysis results of the virtual instrument at any time.

Create various test instruments according to the above steps to meet different test requirements. The appearance, switches and buttons of the instrument are the same as the real instrument, which is convenient for users to develop and use. instrument interface.

In fact, the above-mentioned embodiments are only used to illustrate the present invention, not to limit the present invention. Improvements to the present invention under the premise of the concept of the present invention are all within the protection scope of the claims of the present invention.

Claims (6)

1. A kind of method that development function can reorganize the intelligent control virtual instrument, it is characterized in that: carry out as follows: Step 1. Establish the development system architecture model, design the development blueprint of the development system, and establish a system development plan, which mainly includes: ①Determine the components of the development system. The components of the development system are composed of a control library, a function library, a data pool, a building field, sensors, and a data collector; the sensors and data collectors collect data and store them in the data pool, Two-way data transmission between the data pool and the building field, the output end of the function library is connected to the first input end of the building field, the output end of the control library is connected to the second input end of the building field, and The finished instrument is assembled in the building field; ② Determine the development system structure, the development system structure is composed of configuration system, operation system, configuration database and system resources, and any two of the configuration system, operation system, configuration database and system resources are bidirectionally communicated; ③ Establish a dual-drive mechanism for the development system. The development system adopts an event-driven and data-flow-driven dual-drive mechanism. The event-driven is mainly used for user interaction and system control, and the data-flow-driven is mainly used for function execution and result display; ④Establish the five-element development model of the development system; The five-element development model of the development system divides the development system into five parts: user operation module, data acquisition module, data processing and control module, result output module, system maintenance and self-test module; the user operation module respectively controls the data acquisition module, data processing and control module, result output module, maintenance and self-test module, the data acquisition module acquires data and transmits the data to the data processing and control module, the data processing and control module processes the data, and transmits the data to the result The output module, the system maintenance and self-test module are provided with output terminals respectively connected to the maintenance and self-test input terminals of the user operation module, data acquisition module, data processing and control module, and result output module; Step 2. Build an instrument resource library, and the instrument resources are inherited in the system in the form of function library, virtual control library, and data pool; Step 3. Establish a functional configuration model and assemble the instrument, including: ① Functional configuration configuration; ②Assemble functional modules and data pools into a virtual instrument with complete instrument functions in the development system; Step 4. Establish general data acquisition and management modules, including: ①The acquisition assistant module realizes the transparency of the underlying hardware, and its implementation steps are as follows: (1) Bundle self-developed adjustment and acquisition hardware systems; (2) Use the dynamic library provided by the user to support the data collector and sensor; (3) Unify the data management platform, so that the data can be generalized among various instruments; Step 5. Establish a simple and efficient development model, including: ①Template development mode; ②Intelligent development mode; Step 6. Establish an interaction mechanism with other systems and call third-party functions developed by users, including: ① The function is provided in the form of a dynamic link library; ② The function is provided in the form of C language grammar text; Step 7, establishing a system network interface based on code transmission. 2. according to claim 1, the method for developing functionally reconfigurable intelligent control-based virtual instruments is characterized in that: in step 2, a component instrument function library, a virtual control library, and a data pool are established; Wherein the establishment of the function library, its main steps are: (1) Modeling, algorithm design and software implementation of instrument functions and basic analysis methods in the field of test and analysis instruments as much as possible; (2) Carry out modular decomposition of the functions according to the analysis method and instrument field; (3) Modeling the development and storage of user-defined functions based on function reorganization; (4) Integrate the functional modules formed in the above (2) and (3) in an orderly manner in the system to form a basic function library, an expert instrument library and a custom function library, so as to facilitate the search, selection and call of functions; In the establishment of the virtual control library, the control library contains various non-intelligent virtual controls, and its main steps are: (1) Model various controls, and the software realizes computer expression, which, like traditional controls, has various appearance attributes; (2) Classify various controls into functional controls, data controls and display controls; (3) Store the completed non-intelligent virtual control in the library, and use it as a carrier for function endowment; The establishment of the data pool, the data pool is the container responsible for data sending and receiving and updating in the system, and the main steps of its establishment are: (1) Establish the structure and storage method of data in the data pool; The structure of the data includes data name, data description information, data memory length, data actual length, data type, data address, and data initial value; a structure containing all information is established for each data node in the system, and stored in a linked list Each data node structure; when the system exits, the linked list is saved as a system data file; the data is transparent to different instruments or different functions developed by the development system; (2) Establish a mechanism to dynamically increase or decrease the capacity of the data pool to meet the needs of the instrument, and create a unified data input and output port; (3) Establish the saving and reloading mechanism of the data pool. 3. according to the method for the described development function of claim 1 that can reorganize the intelligent control virtual instrument, it is characterized in that: the configuration configuration of the function described in step 1. in the step 3 is carried out according to the following steps: (1) Select the event that triggers the configuration function; (2) Select the function "given" from the function library to the event selected in (1); (3) Data sources and parameters of configuration functions; (4) Steps (2) and (3) are repeated to assign multiple functions, and the output of the previous function becomes the input of the next function; (5) Adjust the order of functions and delete unnecessary functions; (6) Integrate multiple functions of the event to form a complete test function with the same interface, call and execution mode as the basic functions in the function library; (7) Name and save the new function. 4. According to claim 1, the method for developing functionally reconfigurable intelligent controllable virtual instruments is characterized in that: the establishment of a simple and efficient development mode described in step 5 includes: ①Template development mode, its main steps are: (1) Pre-defined templates, which summarize commonly used virtual instruments or test analysis functions, and create a limited number of templates for them to be stored in the system; (2) Establish keyword template retrieval mechanism for the system; (3) Template loading; (4) The assembled instrument is stored in the system as a template; ②Intelligent development model, its main steps are: (1) Establish a facet classification and facet retrieval mechanism for instrument resources; (2) Establish a rule set based on knowledge discovery; (3) Establish rule classification management; (4) Establish a neural network decision-making center. 5. According to claim 1, the method for developing functionally reconfigurable intelligent controllable virtual instruments is characterized in that: in step 6, establishing an interaction mechanism with other systems and calling third-party functions developed by users includes: ① The function is provided in the form of a dynamic link library, and its basic steps are: (1) Select the dynamic link library that needs to be transferred; (2) automatically identify the function interface in the dynamic link library; (3) Configure the parameter type and form of the interface function; (4) Perform instrument function configuration as part of the function library; ②The function is provided in the form of C language grammar text, and its basic steps are: (1) Read the text file; (2) Check the grammatical correctness in the file; (3) compile and load into the system; (4) Form a system standard unified functional interface; 5) Perform instrument function configuration as part of the function library. 6. According to the method for developing functionally reconfigurable intelligent controllable virtual instruments according to claim 1, it is characterized in that: the system network interface based on code transmission is established as described in step 7, and its main steps are: (1) Three-way handshake identity authentication; (2) The server searches the user information database, the function code table, and returns the function number and description, controls and user manuals that the client is authorized to use; (3) The client refers to the user manual and uses the authorized functions to build the instrument and assign functions; (4) Request the server to check the correctness of the assembly; (5) The server searches for the function code list and function library according to the building rules, and checks the building equipment of the client; (6) Return the server-side inspection result; (7) The server searches the function library, and transmits the corresponding processing code to the client.

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