CN102560940A - Device and method for online detection of dye liquor concentration by dual-wavelength spectrophotometry - Google Patents

Abstract

The invention discloses an on-line detection device and method for dye liquor concentration based on dual-wavelength spectrophotometry, including an ARM7-based control system, double monochromators, an SIA system and a circuit system. The invention can realize the online real-time monitoring function of dye liquor concentration in large, medium and small scale dye vats and has the function of temperature measurement, and can realize the functions of recording and displaying detection data and realizing alarm information when the concentration exceeds the set concentration range. The whole system of the invention has the characteristics of simple structure, convenient operation, accurate measurement, timely information feedback, high working efficiency and the like.

Description

The dye liquor concentration on-line measuring device and the method for dual-wavelength spectrophotometry

Technical field

The invention belongs to textile printing and dyeing and control detection range automatically, specifically is a kind of dye liquor concentration on-line measuring device and method of dual-wavelength spectrophotometry.

Background technology

At present; It is also not overripened that China's printing and dyeing enterprise is controlled detection range automatically at machinery; Automaticity is lower, and half leans on most printing and dyeing enterprise is the control of the not high apparatus processing of automaticity and handle, and half leans on is the experienced printing and dyeing engineer processed of printing and dyeing accordingly.The mode of operation that this semi-automation half is artificial makes production efficiency reduce and the quality of quality that product demonstrates depends on artificial experience to a large extent, and poor stability, accuracy are low.Therefore, be necessary to improve the automaticity of printing and dyeing, thereby the key of its automation is each parameter in the dye liquor to be detected according to the data result judgement that detects make corresponding actions.Detection to each parameter in the dye liquor in textile printing and dyeing is crucial, parameter request is controlled in the mechanization of printing and dyeing included temperature, concentration, pH value, liquid level etc., and the variation of these parameters all can have influence on the quality of product.Present dyeing and finishing technology mostly to the monitoring of temperature and speed aspect, also has monitoring to moisture percentage, pH value, but online detection but is a blank out to the closely bound up dye liquor concentration of accurate dyeing.Therefore, be necessary to develop a kind of device that can the on-line real time monitoring dye liquor concentration, for printing and dyeing enterprise is enhanced productivity and accurate dyeing provides service.

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Summary of the invention

In order to solve the problems of the technologies described above, the invention provides a kind of dye liquor concentration on-line measuring device and method of dual-wavelength spectrophotometry.

A kind of dye liquor concentration on-line measuring device of dual-wavelength spectrophotometry; It is characterized in that it comprises mechanical part, light path part and circuit part, said mechanical part comprises stepper motor and sine mechanism, and said light path part comprises two independently monochromators; Light path system is set in the monochromator; Light path system comprises diffraction grating, plano-concave spherical reflector, and circuit part comprises voltage-stabilized power supply, stepper motor driving circuit, signal conditioning circuit, pump control module, selector valve control module, and said stepper motor driving circuit is connected with stepper motor; Stepper motor is connected with sine mechanism; Sine mechanism is connected with diffraction grating, and host computer PC is connected with slave computer ARM7TDMIS, and slave computer ARM7TDMIS is connected with signal conditioning circuit with stepper motor driving circuit respectively; Slave computer ARM7TDMIS also is connected with the SIA system through pump control module, selector valve control module; Signal conditioning circuit is connected with photoelectric sensor with temperature sensor respectively, and said monochromator is connected with mobile cuvette respectively, and mobile cuvette is connected with SIA system, temperature sensor and photoelectric sensor respectively.

Described checkout gear is characterized in that said SIA system comprises two-way pump, selector valve and reservoir, and two-way pump is connected with selector valve, and selector valve is connected with reservoir.

Described checkout gear is characterized in that said host computer PC is connected with the CAN fieldbus.

The dye liquor concentration online test method of said checkout gear is characterized in that comprising the steps:

1) on host computer PC, sets time, two-way pump slewing rate, direction transformation frequency and running time, the light path system medium wavelength size that stream cleans in the SIA system successively;

2) operation checkout gear; Host computer PC sends to slave computer ARM7TDMIS zeroing order; Thereby the rotation of slave computer ARM7TDMIS control step driven by motor sine mechanism is rotated the diffraction grating that connects together with sine mechanism, and to a certain degree signal of optical coupler feedback is modulated to zero point to slave computer ARM7TDMIS explanation when turning to;

3) host computer PC is sent wavelength and order is set to slave computer ARM7TDMIS, and slave computer ARM7TDMIS drives stepper motor and rotates the wavelength that corresponding step number makes light path reach setting and penetrate from slit;

4) host computer PC is sent and is cleaned the stream order of SIA system, and slave computer ARM7TDMIS cleans according to command execution;

5) host computer PC is sent selector valve that order control opens the SIA system and it is opened lead to dye bath one end; Host computer PC is sent to order and is made selector valve turn to dilution one end subsequently; Host computer PC is sent the exploitation speed and the order of direction change frequency of two-way pump then; Push the dye liquor after the dilution to reservoir through two-way pump, flow into the cuvette that flows;

6) photoelectric sensor work; Collection is also passed through the signal conditioning circuit deal with data; Send to PC interface display dye liquor concentration to the data after handling then; Concentration range can be reported to the police if dye liquor concentration exceeds setting, and simultaneous temperature working sensor collecting temperature signal is through sending to slave computer ARM7TDNMIS and host computer PC after the signal conditioning circuit processing;

7) repeat above-mentioned steps and operate, the system log (SYSLOG) data are also added up.

The dye liquor concentration on-line measuring device and the method for a kind of dual-wavelength spectrophotometry of the present invention; Can be implemented in large, medium and small scale dye vat production line different dye liquor concentrations are carried out the real-time online measuring ability and have the temperature survey function, and can realize setting concentration range and can realizing functions such as warning message to the record that detects data, demonstration and to exceeding.Simple in structure, easy to operate, characteristics such as measurement is accurate, feedback information is timely, operating efficiency height that whole system of the present invention has have been filled up the blank of printing and dyeing enterprise to the closely bound up online detection of dye liquor concentration of accurate dyeing.

Description of drawings

Fig. 1 is the dye liquor concentration on-line measuring device of dual-wavelength spectrophotometry of the present invention and the structure and the principle schematic of method;

Among the figure, 1-host computer PC; 2-slave computer ARM7TDMIS; 3-stepper motor driving circuit; 4-monochromator; 5-voltage-stabilized power supply; 6-SIA system; 7-cuvette flows; 8-photoelectric sensor; 9-signal conditioning circuit; 10-sine mechanism; 11-light path system; 12-stepper motor; 13-two-way pump; 14-selector valve; 15-reservoir; 16-temperature sensor.

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The specific embodiment

Below in conjunction with accompanying drawing the present invention is elaborated.

As shown in Figure 1, the dye liquor concentration on-line measuring device of dual-wavelength spectrophotometry has mechanical system, circuit unit, light path system.Device of the present invention adopt two independently monochromator produce the light of two bundle different wave lengths; Promptly use dual-wavelength spectrophotometry; Handle in conjunction with langbobier law and ARM7 processor data; Thereby it is big to eliminate mixing dye liquor phase mutual interference or ambient interferences to a great extent, realizes the measurement of muddy or many components dye liquor concentration.Native system adopts PC control operation mode, and operating personnel do not need very strong professional knowledge and only need on computer interface, carry out some simple parameters settings and just can start this device completion dye liquor concentration surveying work easily.

Before starting this device; Need guarantee that at first sensor signal lines in the circuit unit correctly is connected with signal conditioning circuit, host computer PC correctly is connected through serial ports with slave computer ARM7TDMIS (being the ARM7 processor); Parts such as diffraction grating, plano-concave spherical reflector do not change between damage, each position in the light path system, and selector valve correctly is connected with two-way pump, reservoir, diluent aperture etc. in the SIA system (being the sequential injection system).

After inspection work was accomplished, at first with pump control circuit and signal conditioning circuit energising in drive circuit, slave computer ARM7TDMIS, the SIA system, slave computer ARM7TDMIS was in running status to the operator afterwards, and whole device is in holding state.

Prepare before the operation; The operator need set suitable systematic parameter on the PC interface; The time that stream cleans in the SIA system at first need be set, two-way pump slewing rate, direction transformation frequency and running time are set then, light path system medium wavelength size then is set.Set the preorder preparation of whole system later on of above parameter and accomplish, system just can carry out measurement of concetration.

The operator clicks the " RUN " button, and host computer PC can be sent to order among the slave computer ARM7TDMIS, the corresponding action of command execution that slave computer ARM7TDMIS sends according to PC according to the program that sets in advance, and the course of work of system is following:

At first this device receives the zeroing order that is sent to slave computer ARM7TDMIS by host computer PC; Thereby the rotation of slave computer ARM7TDMIS control step driven by motor sine mechanism is rotated the grating that connects together with sine mechanism, and to a certain degree signal of optical coupler feedback is modulated to zero point to slave computer ARM7TDMIS explanation when turning to.And then host computer PC is sent wavelength and order is set to slave computer ARM7TDMIS, and slave computer ARM7TDMIS calculates according to programming and drives stepper motor and rotate the wavelength that certain step number just can make light path reach setting and penetrate from slit.

Then, host computer PC is sent and is cleaned the stream order of SIA system, the time that slave computer ARM7TDMIS cleans according to command execution.The host computer PC order of sending afterwards is exploitation speed, the order of direction change frequency of pump, and slave computer ARM7TDNMIS is fill order action repeatedly constantly, ceases and desist order or reset command up to occurring.At first sending selector valve that order control opens the SIA system by host computer PC opens it to lead to dye bath one end; Host computer PC is sent to order and is made selector valve turn to dilution one end subsequently; And then push the dye liquor after its dilution to reservoir through two-way pump, flow into the cuvette that flows.When dye liquor dilution back flows into the cuvette that flows; Photoelectric sensor is just started working; Through the continuous acquisition process data of signal conditioning circuit, send to its dye liquor concentration of PC interface display to the data after handling then, concentration range can be reported to the police if dye liquor concentration exceeds setting.Simultaneous temperature working sensor collecting temperature signal; Through sending to slave computer ARM7TDNMIS and host computer PC after the signal conditioning circuit processing; Because SIA system dilution flow rate etc. is brought the hysteresis of time, temperature; This checkout gear can have been accomplished the variation of real-time detectable concentration through setting up the model of temperature, concentration and time, flow velocity.

Carry out and can operate again by reset key when above step appears in system, after each concentration determination was accomplished, system write down automatically and adds up, and statistics can be consulted and used for dyeing scheme in the future provides.

Host computer PC of the present invention can be connected with the CAN fieldbus, realizes that a PC can measure the concentration of the different dye bath dye liquors in different dyehouses.

The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all is included within protection scope of the present invention.

Claims (4)

1. the dye liquor concentration on-line measuring device of a dual-wavelength spectrophotometry; It is characterized in that it comprises mechanical part, light path part and circuit part; Said mechanical part comprises stepper motor (12) and sine mechanism (10); Said light path part comprises two independently monochromators (4); Light path system (11) is set in the monochromator (4); Light path system (11) comprises diffraction grating, plano-concave spherical reflector, and circuit part comprises voltage-stabilized power supply (5), stepper motor driving circuit (3), signal conditioning circuit (9), pump control module, selector valve control module, and said stepper motor driving circuit (3) is connected with stepper motor (12); Stepper motor (12) is connected with sine mechanism (10); Sine mechanism (10) is connected with diffraction grating, and host computer PC (1) is connected with slave computer ARM7TDMIS (2), and slave computer ARM7TDMIS (2) is connected with signal conditioning circuit (9) with stepper motor driving circuit (3) respectively; Slave computer ARM7TDMIS (2) also is connected with SIA system (6) through pump control module, selector valve control module; Signal conditioning circuit (9) is connected with photoelectric sensor (8) with temperature sensor (16) respectively, and said monochromator (4) is connected with mobile cuvette (7) respectively, and the cuvette (7) that flows is connected (8) with SIA system (6), temperature sensor (16) respectively with photoelectric sensor.

2. checkout gear as claimed in claim 1; It is characterized in that said SIA system (6) comprises two-way pump (13), selector valve (14) and reservoir (15); Two-way pump (13) is connected with selector valve (14), and selector valve (14) is connected with reservoir (15).

3. checkout gear as claimed in claim 1 is characterized in that said host computer PC (1) is connected with the CAN fieldbus.

4. a dye liquor concentration online test method of using the said checkout gear of claim 1 is characterized in that comprising the steps:

1) on host computer PC (1), sets time, two-way pump (13) slewing rate, direction transformation frequency and running time, light path system (11) the medium wavelength size that stream cleans in the SIA system (6) successively;

2) operation checkout gear; Host computer PC (1) sends to slave computer ARM7TDMIS (2) zeroing order; Slave computer ARM7TDMIS (2) control step motor (12) drive sine mechanism (10) thus rotation the diffraction grating that connects together with sine mechanism (10) is rotated, explain modulated for slave computer ARM7TDMIS (2) when turning to a certain degree signal of optical coupler feedback to zero point;

3) host computer PC (1) is sent wavelength and order is set to slave computer ARM7TDMIS (2), and the wavelength that the corresponding step number of slave computer ARM7TDMIS (2) drive stepper motor (12) rotation makes light path reach setting penetrates from slit;

4) host computer PC (1) is sent and is cleaned SIA system (6) stream order, and slave computer ARM7TDMIS (2) cleans according to command execution;

5) host computer PC (1) is sent selector valve (14) that order control opens SIA system (6) and it is opened lead to dye bath one end; Host computer PC (1) is sent to order and is made selector valve (14) turn to dilution one end subsequently; Host computer PC (1) is sent the exploitation speed and the order of direction change frequency of two-way pump (13) then; Push the dye liquor after the dilution to reservoir (15) through two-way pump (13), flow into the cuvette (7) that flows;

6) photoelectric sensor (8) work; Collection is also passed through signal conditioning circuit (9) deal with data; Send to PC interface display dye liquor concentration to the data after handling then; Concentration range can be reported to the police if dye liquor concentration exceeds setting, and simultaneous temperature sensor (16) work collecting temperature signal is through sending to slave computer ARM7TDNMIS (2) and host computer PC (1) after signal conditioning circuit (9) processing;

7) repeat above-mentioned steps and operate, the system log (SYSLOG) data are also added up.