Laboratory self-adaptive variable air volume ventilation control system

Abstract

The utility model discloses a laboratory self-adaptive variable air volume ventilation control system, and relates to the technical field of laboratory ventilation equipment control. The system comprises a temperature and humidity sensor, a pressure difference detector, a harmful gas monitoring sensor, an infrared camera, a data caching module, a multiplexing switch, a data preprocessing module, a controller module, a man-machine interaction module, a clock module, a memory module, a data transmission module, a level conversion and pulse width adjustment circuit, a variable air volume adjusting valve and a power supply module. By arranging various monitoring sensors, the temperature and humidity in a room, the indoor pollution gas concentration, the indoor personnel condition, the indoor pressure condition and the like are monitored in real time, the stability of the indoor pressure can be effectively kept through the controller module, the air supply driving unit, the air supply adjusting valve and the air feeder, the indoor pressure is flexibly adjusted and controlled, the adjusting speed is high, and the indoor pressure can be effectively controlled. The effect is good, and the constant-pressure laboratory environment effectively ensures the health of indoor workers.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of laboratory ventilation equipment control, especially relates to a laboratory self -adaptation variable air volume ventilation control system. BACKGROUND

[0002] From the domestic present situation, monitoring system is everywhere, but overall all are in single separation mode, voice camera needs a set of system, and environmental parameter monitoring such as temperature and humidity also needs a set of system, and the value is not cheap, power consumption is relatively large, mobility is poor, and it needs high hardware and software support, and data acquisition end and monitoring end need to be connected through many long communication lines, so that the system stability is not high, for the place of multi-parameter multi-point monitoring, traditional equipment cannot meet the requirement of node quantity, and the feasibility is not high, and the space occupancy is relatively large. Some traditional equipment is extremely inconvenient to replace sensor, and after replacing the sensor, all sensors need to be renumbered, so it is inconvenient to maintain.

[0003] The laboratory environment is mainly detected by different instruments, and benzene, TVOC, ammonia, formaldehyde and radon in the laboratory environment are detected, instrument equipment is verified, and respective values are printed or manually copied, and finally, reports are uniformly input.

[0004] Because the time of data detection experiment is different, each data is collected in sequence, and when statistics, error or failure may occur due to manual recording, at the same time, manual input is time-consuming and laborious, and the efficiency is low.

[0005] The laboratory ventilation system is one of the systems with the largest scale and the most extensive influence in the whole laboratory design and construction process. Whether the ventilation system is perfect directly has important influence on the laboratory environment, the health of experimental personnel, the operation and maintenance of experimental equipment and the like. UTILITY MODEL CONTENT

[0006] The utility model solves the technical problems of the prior art, and provides a laboratory self-adaptive variable air volume ventilation control system, which realizes constant pressure control of pressure in the laboratory and saves resources.

[0007] The utility model discloses a technical scheme for solving the above technical problems

[0008] A laboratory adaptive variable air volume ventilation control system, comprising a temperature and humidity sensor, a differential pressure detector, a harmful gas monitoring sensor, an infrared camera, a data buffer module, a multiplexing switch, a data preprocessing module, a controller module, a human-computer interaction module, a clock module, a memory module, a data transmission module, a level conversion and pulse width adjustment circuit, a variable air volume regulating valve and a power module; the temperature and humidity sensor, the differential pressure detector and the harmful gas monitoring sensor are connected to the controller module in sequence through the multiplexing switch and the data preprocessing module, the infrared camera is connected to the controller module through the data buffer module, the human-computer interaction module, the clock module, the memory module, the data transmission module and the power module are connected to the controller module, and the controller module is connected to the variable air volume regulating valve through the level conversion and pulse width adjustment circuit.

[0009] As a further preferred scheme of the laboratory adaptive variable air volume ventilation control system, the data preprocessing module comprises a signal conditioning module, a filter gating module and an analog-to-digital conversion module, and the temperature and humidity sensor, the differential pressure detector and the harmful gas monitoring sensor are connected to the controller module in sequence through the signal conditioning module, the filter gating module and the analog-to-digital conversion module.

[0010] As a further preferred scheme of the laboratory adaptive variable air volume ventilation control system, the level conversion and pulse width adjusting circuit comprises a pulse signal generator, a VCC, a Vee, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first potentiometer Rw1, a second potentiometer Rw2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first diode VD1, a second diode VD2, a third diode VD3, and a first operational amplifier U1; wherein the positive terminal of the pulse signal generator is connected to the b terminal of the first potentiometer Rw1, the a terminal of the first potentiometer Rw1 is connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to the negative terminal of the pulse signal generator and grounded, the sliding terminal c of the first potentiometer Rw1 is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is connected to the non-inverting input terminal of the first operational amplifier U1, the non-inverting input terminal of the first operational amplifier U1 is connected to one end of the third resistor R3, the other end of the third resistor R3 is respectively connected to the negative voltage supply end VEE, the sliding terminal c and a terminal of the second potentiometer Rw2, the Vee end, one end of the third capacitor C3, and the negative power supply end of the first operational amplifier U1, the b terminal of the second potentiometer Rw2 is respectively connected to one end of the second resistor R2 and the inverting input terminal of the first operational amplifier U1, the other end of the second resistor R2 is respectively connected to the VCC end, one end of the second capacitor C2, and the positive power supply end of the first operational amplifier U1, the other end of the second capacitor C2 is grounded, the other end of the third capacitor C3 is respectively connected to the positive terminal of the first diode VD1 and one end of the fifth resistor R5 and grounded, the other end of the fourth resistor R4 is respectively connected to the negative terminal of the first diode VD1, the positive terminal of the second diode VD2, and the positive terminal of the third diode VD3, the negative terminal of the second diode VD2 is respectively connected to one end of the fifth resistor R5 and the uo1 end, and the negative terminal of the third diode VD3 is respectively connected to one end of the fifth resistor R5 and the uo1 end.

[0011] As a further preferred scheme of the laboratory adaptive variable air volume ventilation control system, the data buffer module comprises an input FIFO module, a DDR controller, an image parameter calculation module, a DDR2 SDRAM and an output FIFO module, the output end of the infrared camera is connected with the input end of the input FIFO module, the output end of the input FIFO module is connected with the input end of the DDR2 SDRAM, the output end of the DDR2 SDRAM is connected with the input end of the output FIFO module, the output end of the image parameter calculation module is also connected with the input end of the DDR2 SDRAM through the DDR controller, and the output end of the output FIFO module is connected with the input end of the controller module.

[0012] As a further preferred scheme of the laboratory adaptive variable air volume ventilation control system, the controller module adopts an SPCE061A microprocessor.

[0013] As a further preferred scheme of the laboratory adaptive variable air volume ventilation control system, the data transmission module comprises an antenna ANT1, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a resistor R21, a resistor R22, an inductor L11, an inductor L12, a chip U1, a chip U2, a chip U3, the antenna ANT1 is connected with one end of the inductor L11 and one end of the capacitor C16 respectively, the other end of the inductor L11 is grounded, the other end of the capacitor C16 is connected with one end of the inductor L12 and a pin 2 of the chip U1 respectively, the other end of the inductor L12 is grounded, a pin 3 of the chip U1 and a pin 4 of the chip U1 are connected with one end of the capacitor C14, one end of the capacitor C15 and a VDD terminal respectively, the other end of the capacitor C14 and the other end of the capacitor C15 are grounded respectively, a pin 1 of the chip U1 is connected with one end of the capacitor C13, the VDD terminal, a pin 30 of the chip U1 and a pin 29 of the chip U1 respectively, the other end of the capacitor C13 is grounded, a pin 31 of the chip U1 is connected with one end of the resistor R21, the other end of the resistor R21 is grounded, a pin 28 of the chip U1 is connected with one end of the capacitor C11 and a pin 1 of the chip U2 respectively, a pin 2 of the chip U2 is grounded, the other end of the capacitor C11 is grounded, a pin 4 of the chip U2 is grounded, a pin 3 of the chip U2 is connected with one end of the capacitor C12 and a pin 27 of the chip U1 respectively, the other end of the capacitor C12 is grounded, a pin 18 of the chip U1 is connected with a pin 7 of the chip U3, a pin 19 of the chip U1 is connected with a pin 3 of the chip U3, a pin 20 of the chip U1 is connected with a pin 1 of the chip U3, a pin 21 of the chip U1 is connected with a pin 6 of the chip U3 through the resistor R22, a pin 22 of the chip U1 is connected with a pin 2 of the chip U3, a pin 23 of the chip U1 is connected with a pin 5 of the chip U3, and a pin 17 of the chip U1 is connected with a pin 11 of the chip U1 and the VDD terminal respectively.

[0014] As a further preferred scheme of the laboratory adaptive variable air volume ventilation control system, the clock module comprises a clock chip DS3231, a capacitor C4, resistors R25, R26, R27 and R28, the VCC end is connected with one end of the resistor R25 and one end of the resistor R26, the other end of the resistor R25 is connected with the SDA end of the clock chip DS3231, the other end of the resistor R26 is connected with the SCL end of the clock chip DS3231, the VDD end is connected with one end of the resistor R27, one end of the resistor R28, one end of the capacitor C4 and the 2 port of the clock chip DS3231, the other end of the resistor R27 is connected with the 1 port of the clock chip DS3231, the other end of the resistor R28 is connected with the 3 port of the clock chip DS3231, and the other end of the capacitor C4 is grounded.

[0015] As a further preferred scheme of the laboratory adaptive variable air volume ventilation control system, the chip model of the multiplexing switch is AMC4601, which is a 32-channel relay sampling switch module based on a PXI bus and is used for switching the input channel of a signal processing module.

[0016] Compared with the prior art, the laboratory adaptive variable air volume ventilation control system has the following technical effects:

[0017] The laboratory adaptive variable air volume ventilation control system comprises a temperature and humidity sensor, a differential pressure detector, a harmful gas monitoring sensor, an infrared camera, a data caching module, a multiplexing switch, a data preprocessing module, a controller module, a man-machine interaction module, a clock module, a memory module, a data transmission module, a level conversion and pulse width adjustment circuit, a variable air volume regulating valve and a power module. The multiple monitoring sensors are arranged to monitor the temperature and humidity in the room, the indoor pollution gas concentration, the indoor personnel condition and the indoor pressure condition in real time. When the monitoring parameters are inconsistent with the set parameters, the air volume is automatically adjusted, the ventilation is performed as required, and energy is saved. The temperature and humidity sensor can adjust the air volume according to the real-time temperature and humidity in the room. The pressure sensor arranged in the room can adjust the air volume according to the real-time pressure in the room. The infrared camera arranged in the room can adjust the air volume according to the personnel activity condition in the room. The level conversion and pulse width adjustment circuit and the variable air volume regulating valve can effectively maintain the stability of the indoor pressure, flexibly adjust and control the indoor pressure, have fast adjustment speed and good effect, and effectively ensure the health of indoor workers in the constant-pressure laboratory environment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a structural principle view of the laboratory adaptive variable air volume ventilation control system.

[0019] Fig. 2 is a circuit diagram of the level conversion and pulse width adjustment circuit of the utility model;

[0020] Fig. 3 is a structure principle diagram of the data cache module of the utility model;

[0021] Fig. 4 is a structure principle diagram of the data transmission module of the utility model;

[0022] Fig. 5 is a circuit diagram of the clock module of the utility model. DETAILED DESCRIPTION

[0023] The technical scheme of the utility model will be further described in detail below in combination with the drawings:

[0024] In order to further illustrate the content, characteristics and effects of the utility model, the following embodiments are used to further describe the utility model. It should be understood by those skilled in the art that the details and forms of the technical scheme of the utility model can be modified or replaced without deviating from the spirit and scope of the utility model, but these modifications and replacements all fall within the protection scope of the utility model.

[0025] A laboratory adaptive variable air volume ventilation control system, as shown in Fig. 1, comprises a temperature and humidity sensor, a differential pressure detector, a harmful gas monitoring sensor, an infrared camera, a data cache module, a multiplexing switch, a data preprocessing module, a controller module, a man-machine interaction module, a clock module, a memory module, a data transmission module, a level conversion and pulse width adjustment circuit, a variable air volume regulating valve and a power module; the temperature and humidity sensor, the differential pressure detector and the harmful gas monitoring sensor are connected to the controller module in sequence through the multiplexing switch and the data preprocessing module, the infrared camera is connected to the controller module through the data cache module, the man-machine interaction module, the clock module, the memory module, the data transmission module and the power module are connected to the controller module, and the controller module is connected to the variable air volume regulating valve through the level conversion and pulse width adjustment circuit; by setting multiple monitoring sensors, the temperature and humidity in the room, the indoor pollution gas concentration, the indoor personnel situation and the indoor pressure situation are monitored in real time, and when the monitoring parameters are inconsistent with the set parameters, the air volume is automatically adjusted, the ventilation is needed, and the energy is saved; through the temperature and humidity sensor, the air volume can be adjusted according to the real-time temperature and humidity in the room; the pressure sensor is arranged in the room, and the air volume can be adjusted according to the real-time pressure in the room; the infrared camera is arranged in the room, and the air volume can be adjusted according to the personnel activity in the room; through the level conversion and pulse width adjustment circuit and the variable air volume regulating valve, the indoor pressure can be effectively kept stable, the indoor pressure can be flexibly adjusted and controlled, the adjustment speed is fast, the effect is good, and the laboratory environment with constant pressure effectively ensures the health of the indoor workers.

[0026] The data preprocessing module comprises a signal conditioning module, a filtering gating module, and an analog-to-digital conversion module, and the temperature and humidity sensor, the differential pressure detector, and the harmful gas monitoring sensor are sequentially connected to the controller module through the signal conditioning module, the filtering gating module, and the analog-to-digital conversion module.

[0027] As shown in FIG. 2, the level conversion and pulse width adjustment circuit comprises a pulse signal generator, VCC, Vee, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first potentiometer Rw1, a second potentiometer Rw2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first diode VD1, a second diode VD2, a third diode VD3, and a first operational amplifier U1; wherein the positive terminal of the pulse signal generator is connected to the b terminal of the first potentiometer Rw1, the a terminal of the first potentiometer Rw1 is connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to the negative terminal of the pulse signal generator and grounded, the sliding terminal c of the first potentiometer Rw1 is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is connected to the non-inverting input terminal of the first operational amplifier U1, the non-inverting input terminal of the first operational amplifier U1 is connected to one end of the third resistor R3, the other end of the third resistor R3 is connected to the negative voltage supply end VEE, the sliding terminal c and a terminal of the second potentiometer Rw2, the Vee terminal, one end of the third capacitor C3, and the negative power supply terminal of the first operational amplifier U1, respectively, the b terminal of the second potentiometer Rw2 is connected to one end of the second resistor R2 and the inverting input terminal of the first operational amplifier U1, respectively, the other end of the second resistor R2 is connected to the VCC terminal, one end of the second capacitor C2, and the positive power supply terminal of the first operational amplifier U1, respectively, the other end of the second capacitor C2 is grounded, the other end of the third capacitor C3 is connected to the anode terminal of the first diode VD1 and one end of the fifth resistor R5, and grounded, the other end of the fourth resistor R4 is connected to the cathode terminal of the first diode VD1, the anode terminal of the second diode VD2, and the anode terminal of the third diode VD3, respectively, the cathode terminal of the second diode VD2 is connected to one end of the fifth resistor R5 and the uo1 terminal, respectively, and the cathode terminal of the third diode VD3 is connected to one end of the fifth resistor R5 and the uo1 terminal, respectively.

[0028] As shown in Fig. 3, the data buffer module comprises an input FIFO module, a DDR controller, an image parameter calculation module, a DDR2 SDRAM and an output FIFO module, the output end of the infrared camera is connected to the input end of the input FIFO module, the output end of the input FIFO module is connected to the input end of the DDR2 SDRAM, the output end of the DDR2 SDRAM is connected to the input end of the output FIFO module, the output end of the image parameter calculation module is also connected to the input end of the DDR2 SDRAM through the DDR controller, and the output end of the output FIFO module is connected to the input end of the controller module.

[0029] As shown in Figure 4, the data transmission module comprises an antenna ANT1, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a resistor R21, a resistor R22, an inductor L11, an inductor L12, a chip U1, a chip U2, a chip U3, the antenna ANT1 is connected to one end of the inductor L11 and one end of the capacitor C16 respectively, the other end of the inductor L11 is grounded, the other end of the capacitor C16 is connected to one end of the inductor L12 and pin 2 of the chip U1 respectively, the other end of the inductor L12 is grounded, pin 3 of the chip U1 and pin 4 of the chip U1 are connected to one end of the capacitor C14, one end of the capacitor C15 and the VDD terminal respectively, the other end of the capacitor C14 and the other end of the capacitor C15 are grounded respectively, pin 1 of the chip U1 is connected to one end of the capacitor C13, the VDD terminal, pin 30 of the chip U1 and pin 29 of the chip U1 respectively, the other end of the capacitor C13 is grounded, pin 31 of the chip U1 is connected to one end of the resistor R21, the other end of the resistor R21 is grounded, pin 28 of the chip U1 is connected to one end of the capacitor C11 and pin 1 of the chip U2 respectively, pin 2 of the chip U2 is grounded, the other end of the capacitor C11 is grounded, pin 4 of the chip U2 is grounded, pin 3 of the chip U2 is connected to one end of the capacitor C12 and pin 27 of the chip U1 respectively, the other end of the capacitor C12 is grounded, pin 18 of the chip U1 is connected to pin 7 of the chip U3, pin 19 of the chip U1 is connected to pin 3 of the chip U3, pin 20 of the chip U1 is connected to pin 1 of the chip U3, pin 21 of the chip U1 is connected to pin 6 of the chip U3 through the resistor R22, pin 22 of the chip U1 is connected to pin 2 of the chip U3, pin 23 of the chip U1 is connected to pin 5 of the chip U3, pin 17 of the chip U1 is connected to pin 11 of the chip U1 and the VDD terminal respectively.

[0030] As shown in Figure 5, the clock module includes clock chip DS3231, capacitor C4, resistor R25, resistor R26, resistor R27, resistor R28, the VCC end is connected with one end of resistor R25 and one end of resistor R26 respectively, the other end of resistor R25 is connected with the SDA end of clock chip DS3231, the other end of resistor R26 is connected with the SCL end of clock chip DS3231, the VDD end is connected with one end of resistor R27, one end of resistor R28, one end of capacitor C4 and the 2 port of clock chip DS3231 respectively, the other end of resistor R27 is connected with the 1 port of clock chip DS3231, the other end of resistor R28 is connected with the 3 port of clock chip DS3231, and the other end of capacitor C4 is grounded.

[0031] The chip model of the multiplexing switch is AMC4601, which is a 32-channel relay sampling switch module based on PXI bus and is used for switching the input channels of a signal processing module.

[0032] The controller module of the utility model adopts SPCE061A microprocessor, which is a 16-bit μ'nSPTM microprocessor produced by the Suncreate Technology Company, and adopts bus structure inside. Main parameters are: working voltage (CPU) VDD is 2.4-3.6 V, (I / O) VDDH is 2.4-5.5 V; clock: 0.32-49.152 MHz; built-in 2 KB SRAM and 32 KB FLASH; 2 16-bit programmable timers / counters (can automatically preset initial count value); 2 10-bit DAC (digital / analog conversion) output channels; 32-bit I / O general programmable input / output port; 14 interrupt sources can come from timer A / B time base, 2 external clock source inputs, key wake-up; the interrupt system supports 10 interrupt vectors and more than 10 interrupt sources, has low voltage reset (LVR) function and low voltage monitoring (LVD) function, built-in on-line simulation circuit ICE interface, has security capability, has Watch Dog function, the instruction system of μ'nSPTM provides 16-bit*16-bit multiplication operation instruction and inner product operation instruction with high operation speed, adds DSP function for its application.

[0033] SPCE061A has very high computing speed, which is extremely important for real-time operating system. For SPCE061A, the development of traditional microprocessor hardware and software has been simplified, and online simulation is no longer needed. Its SPCE061A large capacity FLASH and SRAM, built-in Ethernet interface, can be directly monitored through the network; With UART interface, various serial devices can be quickly connected to the network. The software development platform ICE of SPCE061A microprocessor integrates programming, compiling, linking, debugging and downloading, and has a perfect TCP / IP protocol stack, supports full-featured UART communication, and is equipped with various I / O driver function library.

[0034] Finally, a few points should be noted: first, in the description of the present application, it should be pointed out that unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;

[0035] Secondly: the utility model discloses the embodiment of the drawings, only relate to the structure involved in the embodiment of the present disclosure, other structures can refer to the usual design, under the condition of no conflict, the same embodiment and different embodiments of the utility model can be combined Finally: the above only for the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A laboratory adaptive variable air volume ventilation control system, characterized by: The application relates to a temperature and humidity sensor, a differential pressure detector, a harmful gas monitoring sensor, an infrared camera, a data buffer module, a multiplexing switch, a data preprocessing module, a controller module, a man-machine interaction module, a clock module, a memory module, a data transmission module, a level conversion and pulse width adjustment circuit, a variable air volume regulating valve and a power module; the temperature and humidity sensor, the differential pressure detector and the harmful gas monitoring sensor are sequentially connected to the controller module through the multiplexing switch and the data preprocessing module; the infrared camera is connected to the controller module through the data buffer module; the man-machine interaction module, the clock module, the memory module, the data transmission module and the power module are connected to the controller module; and the controller module is connected to the variable air volume regulating valve through the level conversion and pulse width adjustment circuit.

2. A laboratory adaptive variable air volume ventilation control system as defined in claim 1, wherein: The data preprocessing module comprises a signal conditioning module, a filter gating module and an analog-to-digital conversion module; the temperature and humidity sensor, the differential pressure detector and the harmful gas monitoring sensor are sequentially connected to the controller module through the signal conditioning module, the filter gating module and the analog-to-digital conversion module.

3. The laboratory adaptive variable air volume ventilation control system of claim 1, wherein: The level conversion and pulse width adjustment circuit comprises a pulse signal generator, a VCC, a Vee, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first potentiometer Rw1, a second potentiometer Rw2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first diode VD1, a second diode VD2, a third diode VD3 and a first operational amplifier U1; wherein the positive terminal of the pulse signal generator is connected to the b terminal of the first potentiometer Rw1, the a terminal of the first potentiometer Rw1 is connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to the negative terminal of the pulse signal generator and grounded, the sliding terminal c of the first potentiometer Rw1 is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is connected to the non-inverting input terminal of the first operational amplifier U1, one end of the third resistor R3 is connected to the non-inverting input terminal of the first operational amplifier U1, the other end of the third resistor R3 is connected to the negative voltage supply terminal VEE, the sliding terminal c and a terminal of the second potentiometer Rw2, the Vee terminal, one end of the third capacitor C3 and the negative power supply terminal of the first operational amplifier U1, respectively, the b terminal of the second potentiometer Rw2 is connected to one end of the second resistor R2 and the inverting input terminal of the first operational amplifier U1, respectively, the other end of the second resistor R2 is connected to the VCC terminal, one end of the second capacitor C2 and the positive power supply terminal of the first operational amplifier U1, respectively, the other end of the second capacitor C2 is grounded, the other end of the third capacitor C3 is connected to the positive terminal of the first diode VD1 and one end of the fifth resistor R5 and grounded, the other end of the fourth resistor R4 is connected to the negative terminal of the first diode VD1, the positive terminal of the second diode VD2 and the positive terminal of the third diode VD3, respectively, one end of the fifth resistor R5 is connected to the negative terminal of the second diode VD2 and the uo1 terminal, respectively, one end of the fifth resistor R5 is connected to the negative terminal of the third diode VD3 and the uo1 terminal, respectively.

4. The laboratory adaptive variable air volume ventilation control system of claim 1, wherein: The data buffer module comprises an input FIFO module, a DDR controller, an image parameter calculation module, a DDR2 SDRAM and an output FIFO module, the output end of the infrared camera is connected to the input end of the input FIFO module, the output end of the input FIFO module is connected to the input end of the DDR2 SDRAM, the output end of the DDR2 SDRAM is connected to the input end of the output FIFO module, the output end of the image parameter calculation module is also connected to the input end of the DDR2 SDRAM through the DDR controller, and the output end of the output FIFO module is connected to the input end of the controller module.

5. The laboratory adaptive variable air volume ventilation control system of claim 1, wherein: The controller module adopts an SPCE061A microprocessor.

6. The laboratory adaptive variable air volume ventilation control system of claim 1, wherein: The data transmission module comprises an antenna ANT1, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a resistor R21, a resistor R22, an inductor L11, an inductor L12, a chip U1, a chip U2 and a chip U3, the antenna ANT1 is connected to one end of the inductor L11 and one end of the capacitor C16, the other end of the inductor L11 is grounded, the other end of the capacitor C16 is connected to one end of the inductor L12 and a pin 2 of the chip U1, the other end of the inductor L12 is grounded, a pin 3 of the chip U1 and a pin 4 of the chip U1 are connected to one end of the capacitor C14, one end of the capacitor C15 and a VDD terminal respectively, the other end of the capacitor C14 and the other end of the capacitor C15 are grounded respectively, a pin 1 of the chip U1 is connected to one end of the capacitor C13, the VDD terminal, a pin 30 of the chip U1 and a pin 29 of the chip U1 respectively, the other end of the capacitor C13 is grounded, a pin 31 of the chip U1 is connected to one end of the resistor R21, the other end of the resistor R21 is grounded, a pin 28 of the chip U1 is connected to one end of the capacitor C11 and a pin 1 of the chip U2 respectively, a pin 2 of the chip U2 is grounded, the other end of the capacitor C11 is grounded, a pin 4 of the chip U2 is grounded, a pin 3 of the chip U2 is connected to one end of the capacitor C12 and a pin 27 of the chip U1 respectively, the other end of the capacitor C12 is grounded, a pin 18 of the chip U1 is connected to a pin 7 of the chip U3, a pin 19 of the chip U1 is connected to a pin 3 of the chip U3, a pin 20 of the chip U1 is connected to a pin 1 of the chip U3, a pin 21 of the chip U1 is connected to a pin 6 of the chip U3 through the resistor R22, a pin 22 of the chip U1 is connected to a pin 2 of the chip U3, a pin 23 of the chip U1 is connected to a pin 5 of the chip U3, and a pin 17 of the chip U1 is connected to a pin 11 of the chip U1 and the VDD terminal respectively.

7. The laboratory adaptive variable air volume ventilation control system of claim 1, wherein: The clock module comprises a clock chip DS3231, a capacitor C4, resistors R25, R26, R27 and R28, the VCC end is connected with one end of the resistor R25 and one end of the resistor R26, the other end of the resistor R25 is connected with the SDA end of the clock chip DS3231, the other end of the resistor R26 is connected with the SCL end of the clock chip DS3231, the VDD end is connected with one end of the resistor R27, one end of the resistor R28, one end of the capacitor C4 and the 2 port of the clock chip DS3231, the other end of the resistor R27 is connected with the 1 port of the clock chip DS3231, the other end of the resistor R28 is connected with the 3 port of the clock chip DS3231, and the other end of the capacitor C4 is grounded.

8. The laboratory adaptive variable air volume ventilation control system of claim 1, wherein: The chip model of the multiplexing switch is AMC4601, which is a 32-channel relay sampling switch module based on PXI bus and is used for switching the input channel of the signal processing module.

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