CN110543131B - A computer room emergency notification system - Google Patents

Abstract

The invention discloses a machine room emergency notification system, which can comprise a host, a collection node, a positioning node, a sensor and an upper computer, wherein the host, the collection node and the positioning node are all provided with ZigBee modules to form a ZigBee wireless local area network, the ZigBee modules of the host are used as a coordinator, the ZigBee modules of the collection node and the positioning node are used as routers, the sensor is electrically connected with the collection node, the upper computer is in communication connection with the host, and the collection node is used for collecting environmental data through the sensor and then broadcasting and sending the collected data at regular time; the positioning node is used for receiving the data sent by the acquisition node, detecting and processing the position information of the acquisition node, sending the processed data to the host computer at fixed points, and the upper computer is used for displaying the data sent by the host computer.

Description

A computer room emergency notification system

Technical field

The invention belongs to the field of computer room monitoring equipment, and specifically relates to a computer room emergency notification system.

Background technique

In recent years, the number of emergency plans for computer rooms has been increasing. The issue of how to strengthen production safety and improve the efficiency of early warning and post-remediation work has been placed in front of competent departments and leaders at all levels. In the context of rapid economic development and tight energy supply, it is necessary to conduct in-depth research on how to properly handle the relationship between ensuring security and improving system availability. Economic development cannot be at the expense of the environment and lives, so improving the level of information management of production safety and strengthening the long-term mechanism for production safety with disaster prevention and remediation as the main goals is the only way for my country's production safety work.

In extreme environments, such as typhoons and earthquakes, when the network is disconnected, there is an urgent need for a monitoring system that does not rely on traditional networks to monitor the computer room environment.

Contents of the invention

The present invention aims to provide an emergency notification system for a computer room to solve the above technical problems. To this end, the specific technical solutions adopted by the present invention are as follows:

A computer room emergency notification system, which can include a host, a collection node, a positioning node, a sensor and a host computer. The host, collection node and positioning node are all equipped with ZigBee modules to form a ZigBee wireless LAN, in which the ZigBee module of the host serves as the coordinator , the ZigBee module of the collection node and positioning node acts as a router, the sensor is electrically connected to the collection node, and the host computer is connected to the host. The collection node is used to collect environmental data through the sensor, and then broadcasts the collected data regularly; the positioning node is used to receive The data sent by the node is collected, and the location information of the collected node is detected and processed at the same time. The processed data is sent to the host at a fixed point, and the host computer is used to display the data sent by the host.

Further, the data format sent by the collection node is as follows:

0 1 2 3 4 5 (6-13) (14 15) 'c' 'a' 'i' 'R' 'O' 'U' IEEE NID 16 17 18 19 20 twenty one Mark Temp CO H2S REF.x FEF.y

Among them, bits 0-5 are the name of the collection node, IEEE is the physical address, NID is the network address, Mark=0 represents the collection node, Temp is the temperature value, the value is in degrees Celsius, CO is the carbon monoxide concentration, and H2S is hydrogen sulfide. concentration, REF.x and REF.y are the geographical location coordinates of the reference node.

Furthermore, the location information of the collection node detected by the positioning node is specifically as follows: according to the detected link quality information LQI value of the collection node, the distance value between the positioning node and the collection node is obtained by using the interpolation table method, and the LQI value, the geographic location coordinates, and the distance value are stored in a structure, the format of which is as follows:

Among them, x and y are the geographical location coordinates of the collection node, LQI is the link quality information LQI value, and Distance is the distance value between the positioning node and the collection node.

Further, the host computer and the upper computer are connected through serial port communication.

Further, the host, positioning node and collection node all include CC2430 main processor.

Furthermore, the collection node includes a mobile wearable device, and the mobile wearable device has a pulse detection module.

Further, ZigBee wireless LAN is a mesh network.

The present invention adopts the above technical solution, and has the beneficial effect that: the computer room emergency notification system of the present invention does not rely on the network system of the computer room, and is safer and more reliable than the existing computer room monitoring system.

Description of drawings

To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

Figure 1 is a schematic block diagram of a computer room emergency notification system according to an embodiment of the present invention;

Figure 2 is a circuit schematic diagram of the computer room emergency notification system shown in Figure 1;

Figure 3 is a work flow chart of the host computer room emergency notification system shown in Figure 1;

Figure 4 is a workflow diagram of the collection node of the computer room emergency notification system shown in Figure 1;

Figure 5 is a work flow chart of the positioning node of the computer room emergency notification system shown in Figure 1.

Detailed ways

The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

Figure 1 shows a computer room emergency notification system according to an embodiment of the present invention. The entire hardware of the computer room emergency notification system uses TI's CC2430 as the main processor, and cooperates with peripheral serial ports and various sensors to form a minimum measurement and control system. The schematic diagram is shown in Figure 2. The computer room emergency notification system may include a host 1, a collection node 2, a positioning node 3, a sensor 4 and a host computer 5. Host 1, collection node 2 and positioning node 3 are all equipped with ZigBee modules to form a ZigBee wireless LAN. Among them, the ZigBee module of host 1 serves as the coordinator, and the ZigBee modules of collection node 2 and positioning node 3 serve as routers. It should be noted that the network is a mesh network, and the collection nodes and positioning nodes are routers. Since the router programs are the same, we use the method of distinguishing the two devices by reading the level of the external input pin P1_0. The specific networking process is:

First, a wireless LAN is established through a coordinator, and the coordinator establishes a network immediately after power-on.

Second, the router joins the network. After the router is powered on, it immediately searches for a suitable Zigbee network and, if so, sends a join request.

The specific structure and work flow of host 1, collection node 2 and positioning node 3 are described below respectively.

1. Host

The main functions of the host are:

(1) When the system starts, the coordinator performs networking;

(2) When receiving a router joining request, assign it a network ID number;

(3) The data sent by the positioning nodes are integrated and transmitted to the host computer through the serial port for display.

The workflow diagram is shown in Figure 3, and the details are as follows:

First, the host is networked through its ZigBee module (i.e., coordinator). After the host is powered on, it automatically sends a network establishment request and waits for networking feedback information. If the networking fails, it will delay for a period of time and then resend the networking request until the networking is successful.

Secondly, determine whether a router (collection node or positioning node) has joined. If there is, assign a network ID number to it, store its physical address and network address through a linked list, and send a message indicating that it has successfully joined the network through the serial port.

The last step is to receive the data sent by the positioning node. Since the collection node sends data by broadcast, the host will be able to receive the data of the collection node and the positioning node, and the data sent by the positioning node already contains the processed data of the collection node. , so the host only needs to process the data of the positioning node. By reading the data of the positioning node, it is divided and sent to the host computer through the serial port for display. In this embodiment, the host computer and the upper computer are connected through serial port communication. Of course, other communication connection methods known to those skilled in the art can also be used between the upper computer and the host computer.

2. Collection Node

The main functions of the collection node are:

(1) When powered on, it joins the wireless LAN by sending a network join request and sending data. The data format is as follows:

The purpose of sending data is to remind the user whether joining the network is successful.

(2) Collect data from each environmental sensor and broadcast it. In a specific embodiment, the environmental sensors include a temperature sensor, a carbon monoxide gas sensor, and a hydrogen sulfide sensor. In this case, the data format sent by the collection point is as follows:

Among them, IEEE is the physical address, NID is the network address, Mark=0 flag bit collection node,

Temp is the temperature value, and its value is in degrees Celsius. If the ambient temperature is 25°C, 25 is sent. CO is the concentration of carbon monoxide, H2S is the concentration of hydrogen sulfide, REF.x and REF.y are the geographical location coordinates of the reference node.

It should be understood that the electrical connection between the sensor and the collection node may be in a wired or wireless manner. Of course, collection nodes and environmental sensors can also be integrated together.

In addition, the collection node may also include a mobile wearable device having a pulse detection module. When the computer room manager puts on the mobile wearable device, the host computer can monitor the location of the computer room manager.

In this embodiment, the temperature sensor is AD590. It is a monolithic integrated two-terminal temperature sensing current source produced by American Analog Devices Company. Its main features are as follows:

(1) The relationship between temperature and voltage is linear.

(2) The temperature measurement range of AD590 is -55℃～+150℃.

(3) The power supply voltage range of AD590 is 4V to 30V. AD590 can withstand 44V forward voltage and 20V reverse voltage, so the device will not be damaged if it is reversely connected.

(4) High accuracy, non-linear error is ±0.3℃.

The calculation of the temperature value is: temperature = (acquisition voltage value * 100-273) ° C. Therefore, after AD conversion of the collected output voltage of AD590, the ambient temperature can be obtained through simple algebraic calculation.

In this embodiment, the carbon monoxide gas sensor is MQ-7. MQ-7 is a sensitive element composed of a miniature AL2O3 ceramic tube, a SnO2 sensitive layer, a measuring electrode and a heater, which is fixed in a cavity made of plastic or stainless steel. The heater provides the necessary working conditions for the gas sensor. The filter cavity filled with activated carbon further weakens the interference of nitrogen oxides and alkanes. The packaged gas sensor has 6 needle-like pins and 4 for Signal extraction, 2 are used to provide heating current.

Working principle: The sensor surface resistance Rs is obtained through the effective voltage signal VRL output on the load resistor RL connected in series with it. The relationship between the two is:

Rs/RL=(Vc-VRL)/VRL.

3. Positioning nodes

The main functions of the positioning node are:

(1) Power on and join the network

(2) Accept the data from the collection node and process it

(3) Send the integrated data of the collection node and its own positioning information, and send it to the coordinator at a fixed point.

The workflow diagram is shown in Figure 5. When the positioning node successfully joins the network, the positioning node can receive the data of the collection node, process the data, and send it to the host after the data collection and processing is completed.

Specifically, when the positioning node receives data, it first determines whether the data is from a collection node, that is, whether the 16th bit Mark value of the sent data is 0. Secondly, the environmental information collected by the collection node is stored. Since the storage medium is an array, its length is the number of collection nodes. When the data enters the positioning node, the oldest data is overwritten in a loop, and the link quality information LQI value and geographical location of the received collection node are stored in the structure. The format of the structure is as follows:

Among them, x and y are read from the data packet sent by the collection node, which are the locations x and y of the collection node respectively, the LQI value is the link quality information LQI value of the collection node, and Distance is used to record the distance between the two transceiver nodes. Since the LQI value has a certain relationship with the distance between the two transceiver nodes, the distance between the two transceiver nodes can be obtained by the LQI value obtained by actual measurement. More specifically, the table is queried through the received data LQI value to find the closest distance value, and then it is stored in the Distance data of the corresponding structure.

The actual measured data between LQI value and distance is shown in Table 1:

Table 1

Note: LQI1 and LQI2 are the two measurement results of the distance from near to far and from far to near respectively.

Using the open space for interpolation, the query table of LQI value and distance is shown in Table 2:

Table 2

Distance(cm) 130 140 150 160 170 180 190 200 QI 43 41 39 37 36 35 34 33 Distance(cm) 210 220 230 240 250 260 270 280 QI 33 32 32 31 31 29 26 twenty three Distance(cm) 290 300 310 320 330 340 350 360 QI twenty one 19 17 15 13 12 11 10 Distance(cm) 370 380 390 400 430 450 500 530 QI 9 8 7 7 6 5 5 4 Distance(cm) 550 600 650 700 800 QI 3 3 2 1 0

The following briefly explains the working principle of the computer room emergency notification system of the present invention. The collection node collects environmental and other data through various sensors connected to it, and then broadcasts and sends the collection data regularly; the positioning node collects equipment information and environmental information and accepts the data sent by the collection node, and receives the signal strength and collection data of the collection node. The geographical location of the node is used to locate the person. After the data is processed by the collection node, the data is sent to the host at a fixed point; the host feeds the data back to the host computer through the serial port in real time for display. Since the computer room emergency notification system of the present invention does not rely on the existing computer room network system, it can monitor the computer room in emergencies such as a fire in the computer room to ensure the safety of computer room workers. It is safer and more reliable than the existing computer room monitoring system. .

Although the invention has been specifically shown and described in connection with the preferred embodiments, it will be apparent to those skilled in the art that the invention can be modified in form and detail without departing from the spirit and scope of the invention as defined by the appended claims. Various changes are made within the scope of the present invention.

Claims (3)

1. A computer room emergency notification system, characterized in that it includes a host, a collection node, a positioning node, a sensor and a host computer, wherein the host, the collection node and the positioning node are all provided with a ZigBee module to form a ZigBee wireless local area network, wherein the ZigBee module of the host serves as a coordinator, the ZigBee modules of the collection node and the positioning node serve as routers, the sensor is electrically connected to the collection node, the host computer is connected to the host computer for communication, the collection node is used to collect environmental data through the sensor, and then broadcasts and sends the collected data at a fixed time; the positioning node is used to receive the data sent by the collection node, and at the same time detects the location information of the collection node and processes it, and sends the processed data to the host at a fixed point, and the host computer is used to display the data sent by the host; Among them, the data format sent by the collection node is as follows: 0 1 2 3 4 5 (6-13) (1415) 'c' 'a' 'i' 'R' '0' 'U' IEEE NID 16 17 18 19 20 twenty one Mark Temp CO H2S REF.x FEF.y Among them, bits 0-5 are the name of the collection node, IEEE is the physical address, NID is the network address, Mark=0 represents the collection node, Temp is the temperature value, the value is in degrees Celsius, CO is the carbon monoxide concentration, and H2S is hydrogen sulfide. concentration, REF.x and REF.y are the geographical location coordinates of the reference node; Among them, the location information of the positioning node detection and collection node is specifically: according to the detected link quality information LQI value of the collection node, using the interpolation table method, the distance value of the positioning node and the collection node is obtained, and the LQI value, geographical location coordinates are , the distance value is stored in the structure. The format of the structure is as follows: Among them, x and y are the geographical location coordinates of the collection node, LQI is the link quality information LQI value, and Distance is the distance value between the positioning node and the collection node; Wherein, the collection node includes a mobile wearable device, and the mobile wearable device has a pulse detection module. 2. The computer room emergency notification system according to claim 1, characterized in that the host computer and the host computer are connected through serial port communication. 3. The computer room emergency notification system according to claim 1, wherein the ZigBee wireless local area network is a mesh network.