Gas sensor detection device

Abstract

The utility model relates to a sensor detection device, and aims to solve the technical problem that the existing gas sensor detection mode cannot guarantee the detection precision. The utility model provides a gas sensor detection device which comprises a detection box, a detection bottom plate is arranged in the detection box, and the detection bottom plate is provided with an MCU module, a voltage conversion module, and a standard sensor interface module, a to-be-detected sensor interface module, an electronic valve interface module and a display screen interface module which are connected with the MCU module and the voltage conversion module. A display screen is fixedly mounted on the outer wall of the detection box and is electrically connected with the display screen interface module; a gas bottle is arranged on the outer side of the detection box, a bottle opening of the gas bottle extends into the detection box, an electronic valve is arranged at the bottle opening, and the electronic valve is electrically connected with the electronic valve interface module. According to the utility model, the influence of human factors on the detection result can be avoided, and the precision of the detection result is higher.

Description

Technical Field

[0001] The utility model relates to a sensor detection device, in particular to a gas sensor detection device. Background Art

[0002] As we all know, natural gas vehicles (NGVs) use natural gas as their energy source. If components such as gas tanks, pipelines, and valves become aged, damaged, or loose, they can lead to natural gas leaks. If the leak is close to the cab, there's a high probability that natural gas will enter, posing a life-threatening threat to the driver. To ensure driver safety while operating a NGV, it's necessary to install a gas sensor in the cab of a NGV to monitor the natural gas concentration in real time.

[0003] Typically, after a gas sensor is manufactured, standard gas or dedicated testing equipment is used to introduce gas into the sensor at a predetermined concentration gradient. The changes in the sensor's output signal are then observed and recorded. By comparing the signal with a standard curve or a preset threshold, the sensor is evaluated to determine whether it meets the requirements. However, this testing method does not guarantee detection accuracy. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problem that the existing gas sensor detection method cannot guarantee the detection accuracy, and to provide a gas sensor detection device.

[0005] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0006] A gas sensor detection device includes a detection box with an opening on one side, a detection base plate provided in the detection box, an MCU module, a voltage conversion module, a standard sensor interface module connected to the MCU module and the voltage conversion module, a sensor interface module to be tested, an electronic valve interface module, and a display interface module;

[0007] The standard sensor interface module is electrically connected to the standard sensor, and the gas sensor to be tested is electrically connected to the sensor interface module to be tested;

[0008] A display screen is fixedly mounted on the outer wall of the detection box, and the display screen is electrically connected to the display screen interface module;

[0009] A gas cylinder is provided on the outside of the detection box, the bottle mouth of the gas cylinder extends into the interior of the detection box, and an electronic valve is provided at the bottle mouth, which is electrically connected to the electronic valve interface module.

[0010] Furthermore, the voltage conversion module includes a voltage conversion chip V1, a Vin pin of the voltage conversion chip V1 is connected to a 5V power supply terminal and one end of a capacitor C6, and the other end of the capacitor C6 is grounded;

[0011] The Vout pin of the voltage conversion chip V1 is connected to a 3.3V power supply terminal, one end of the capacitor C7 and the capacitor C8, and the other ends of the capacitors C7 and C8 are connected and connected to the GND pin of the voltage conversion chip V1.

[0012] Furthermore, the MCU module includes an MCU single chip computer U1;

[0013] The first pin of the MCU U1 is connected to the cathode of the diode D2 and the diode D3, and one end of the capacitor C1; the anode of the diode D2 is connected to the 3.3V power supply terminal; the anode of the diode D3 is connected to the cathode of the Schottky diode; the other end of the capacitor C1 is grounded and connected to the anode of the Schottky diode D1;

[0014] The fifth pin of the MCU microcontroller U1 is connected to the passive crystal oscillator Y1, the resistor R1, one end of the capacitor C2, the other end of the capacitor C2 is grounded, and one end of the capacitor C3, the other end of the capacitor C3 is connected to the other end of the passive crystal oscillator Y1, the other end of the resistor R1, and the sixth pin of the MCU microcontroller U1;

[0015] The eighth pin of the MCU U1 is grounded, and one end of the capacitor C4 and the capacitor C5, and the other ends of the capacitor C4 and the capacitor C5 are connected to one end of the resistor R2 and the ninth pin of the MCU U1, and the other end of the resistor R2 is connected to the 3.3V power supply terminal;

[0016] The 46th pin, the 45th pin and the 43rd pin of the MCU U1 are connected to the cathodes of the light-emitting diode LED1, the light-emitting diode LED2 and the light-emitting diode LED3 respectively;

[0017] The anodes of the light-emitting diodes LED1, LED2 and LED3 are connected to one end of the resistors R6, R7 and R8 respectively, and the other ends of the resistors R6, R7 and R8 are all connected to the 3.3V power supply terminal.

[0018] Furthermore, the sensor interface module to be tested includes an interface P1 and an interface P2;

[0019] The first pin, the second pin, the third pin, the fourth pin and the fifth pin of the interface P1 are connected to the 40th pin, the 38th pin, the 37th pin, the 34th pin and the 33rd pin of the MCU U1 respectively;

[0020] The first pin, the second pin, the third pin, the fourth pin and the fifth pin of the interface P2 are respectively connected to the 32nd pin, the 31st pin, the 30th pin, the 29th pin and the 28th pin of the MCU U1;

[0021] The first pin, second pin, third pin, fourth pin and fifth pin of the interface P1 are connected to the V pins of the sensor interface GAS5, sensor interface GAS4, sensor interface GAS3, sensor interface GAS2 and sensor interface GAS1 respectively; the VCC pins of the sensor interface GAS5, sensor interface GAS4, sensor interface GAS3, sensor interface GAS2 and sensor interface GAS1 are all connected to the 5V power supply terminal, and the GND pins are all grounded;

[0022] The first pin, second pin, third pin, fourth pin and fifth pin of the interface P2 are respectively connected to the V pins of the sensor interface GAS10, sensor interface GAS9, sensor interface GAS8, sensor interface GAS7 and sensor interface GAS6; the VCC pins of the sensor interface GAS10, sensor interface GAS9, sensor interface GAS8, sensor interface GAS7 and sensor interface GAS6 are all connected to the 5V power supply terminal, and the GND pins are all grounded.

[0023] Furthermore, the standard sensor interface module includes a standard sensor interface H1 , a VCC pin of the standard sensor interface H1 is connected to a 5V power supply terminal, an L pin is connected to a 21st pin of the MCU U1 , and a GND pin is grounded.

[0024] Furthermore, the electronic valve interface module includes a valve interface H2, a VCC pin of the valve interface H2 is connected to a 5V power supply terminal, a CON pin is connected to the twenty-seventh pin of the MCU U1, and a GND pin is grounded.

[0025] Furthermore, the display screen interface module includes a display screen interface A1 and a display screen interface A2, and a current limiting protection module for supplying power to the display screen interface A2;

[0026] The first pin of the display screen interface A1 is connected to a 3.3V power supply terminal, the second pin of the display screen interface A1 is connected to the ninth pin of the display screen interface A2, and the eighth pin is grounded;

[0027] The second pin, the third pin, the fourth pin, the sixth pin and the seventh pin of the display screen interface A1 are connected to the seventeenth pin, the eighteenth pin, the twentieth pin, the fifteenth pin and the sixteenth pin of the MCU U1 respectively;

[0028] The second pin of the display screen interface A2 is connected to the third pin of the transistor Q1, the first pin of the transistor Q1 is connected to one end of the resistor R4 and the resistor R5, the other end of the resistor R4 is left unconnected, the other end of the resistor R5 is grounded and the second pin of the transistor Q1; the third pin of the display screen interface A2 is connected to the fourth pin, and the third pin is connected to the current limiting protection module, as well as one end of the capacitor C4 and the capacitor C5, and the other ends of the capacitor C4 and the capacitor C5 are both grounded.

[0029] Furthermore, the current limiting protection module includes a resistor R3, one end of the resistor R3 is connected to the 3.3V power supply terminal, and the other end is connected to the third pin of the display screen interface A2.

[0030] Furthermore, a plurality of fans are fixedly installed in the detection box, and a fan interface module connected to the fans is provided on the detection board;

[0031] The fan interface module includes a fan interface H3 and a fan interface H4;

[0032] The first pin of the fan interface H3 is connected to the 42nd pin of the MCU U1, and the first pin of the fan interface H4 is connected to the 41st pin of the MCU U1;

[0033] The second pin of the fan interface H3 is connected to the second pin of the fan interface H4 and is grounded.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The gas sensor detection device provided by the present invention is configured to plug a standard sensor into a standard sensor interface module, and plug a gas sensor to be tested into the gas sensor interface module to be tested; the MCU module then controls the electronic valve through the electronic valve interface module to allow the gas in the gas cylinder to enter the detection box to create a detection environment; the standard sensor and the gas sensor to be tested upload the detected concentration values ​​to the MCU module, which then compares the concentration values ​​detected by the standard sensor with the concentration values ​​detected by the gas sensor to be tested, and displays the detection results on a display screen; by using the MCU module and the standard sensor to detect the gas sensor to be tested, the influence of human factors on the detection results can be avoided, and the detection results can be more accurate.

[0036] 2. The gas sensor detection device provided by the present invention can expand the number of gas sensors to be tested in a single test to improve detection efficiency by dividing the interface module of the sensor to be tested into interface P1 and interface P2. Interface P1 is connected to sensor interfaces GAS1 to GAS5, and interface P2 is connected to sensor interfaces GAS6 to GAS10. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0038] Figure 2 This is a schematic diagram of each module on the detection base plate in an embodiment of the present utility model;

[0039] Figure 3 This is a circuit diagram of a voltage conversion module in an embodiment of the present utility model;

[0040] Figure 4 This is a circuit diagram of the MCU module, standard sensor interface module, display screen interface A1, fan interface module, electronic valve interface module and sensor interface module to be tested in the embodiment of the present utility model;

[0041] Figure 5 This is a circuit diagram of the display screen interface A2 in the embodiment of the present utility model;

[0042] Figure 6 This is a circuit diagram of a current limiting protection module in an embodiment of the present utility model;

[0043] Figure 7 This is a circuit diagram of the interface P1 and the sensor interface in the embodiment of the present utility model;

[0044] Figure 8 This is a circuit diagram of the interface P2 and the sensor interface in the embodiment of the present utility model;

[0045] Explanation of the accompanying drawings: 1 is a detection box, 2 is a detection base plate, 3 is an MCU module, 4 is a voltage conversion module, 5 is a standard sensor interface module, 6 is a display interface module, 7 is a sensor interface module to be tested, 8 is an electronic valve interface module, 9 is a gas cylinder, 10 is an electronic valve, 11 is a display, 12 is a fan, and 13 is a fan interface module. DETAILED DESCRIPTION

[0046] The following is a clear and complete description of the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0047] like Figure 1 As shown, a gas sensor detection device includes a detection box 1 with an opening on one side, and a detection bottom plate 2 is provided in the detection box 1. Figure 2As shown, the detection base plate 2 is provided with an MCU module 3, a voltage conversion module 4, and a standard sensor interface module 5, a sensor interface module 7 to be tested, an electronic valve interface module 8, and a display interface module 6 connected to the MCU module 3 and the voltage conversion module 4; the standard sensor interface module 5 is electrically connected to a standard sensor, and the gas sensor to be tested is electrically connected to the sensor interface module 7 to be tested;

[0048] In order to facilitate the output of the detection results of the MCU module 3, a display screen 11 is fixedly installed on the outer wall of the detection box 1, and the display screen 11 is electrically connected to the display screen interface module 6;

[0049] In order to realize the detection of the gas sensor to be tested, the corresponding gas concentration is simulated in the detection box 1. A gas cylinder 9 is provided on the outside of the detection box 1, and the bottle mouth of the gas cylinder 9 extends into the interior of the detection box 1; in order to enable the MCU module 3 to control the connection state between the gas cylinder 9 and the interior of the detection box 1, an electronic valve 10 is provided at the bottle mouth of the gas cylinder 9, and the electronic valve 10 is electrically connected to the electronic valve interface module 8.

[0050] like Figure 3 As shown, the voltage conversion module 4 includes a voltage conversion chip V1, a capacitor C6, a capacitor C7 and a capacitor C8;

[0051] The Vin pin of the voltage conversion chip V1 is connected to a 5V power supply terminal and one end of a capacitor C6, and the other end of the capacitor C6 is grounded;

[0052] The Vout pin of the voltage conversion chip V1 is connected to a 3.3V power supply terminal, one end of the capacitor C7 and the capacitor C8, and the other ends of the capacitors C7 and C8 are connected and connected to the GND pin of the voltage conversion chip V1.

[0053] like Figure 4 As shown, the MCU module 3 includes an MCU microcontroller U1, a Schottky diode D1, a diode D2, a diode D3, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a resistor R1, a resistor R2, a resistor R6, a resistor R7, a resistor R8, a passive crystal oscillator Y1, a light-emitting diode LED1, a light-emitting diode LED2 and a light-emitting diode LED3;

[0054] The first pin of the MCU U1 is connected to the cathode of diodes D2 and D3, and one end of capacitor C1; the anode of diode D2 is connected to the 3.3V power supply terminal; the anode of diode D3 is connected to the cathode of the Schottky diode; the other end of capacitor C1 is connected to ground and the anode of Schottky diode D1;

[0055] The fifth pin of the MCU U1 is connected to the passive crystal oscillator Y1, the resistor R1, one end of the capacitor C2, the other end of the capacitor C2 is grounded, and one end of the capacitor C3, the other end of the capacitor C3 is connected to the other end of the passive crystal oscillator Y1, the other end of the resistor R1, and the sixth pin of the MCU U1;

[0056] The eighth pin of the MCU U1 is grounded, and one end of the capacitor C4 and the capacitor C5 are connected. The other ends of the capacitors C4 and C5 are connected to one end of the resistor R2 and the ninth pin of the MCU U1. The other end of the resistor R2 is connected to the 3.3V power supply terminal.

[0057] The 46th pin, the 45th pin and the 43rd pin of the MCU U1 are connected to the cathodes of the light emitting diode LED1, the light emitting diode LED2 and the light emitting diode LED3 respectively;

[0058] The anodes of the light-emitting diodes LED1, LED2 and LED3 are connected to one end of the resistors R6, R7 and R8 respectively, and the other ends of the resistors R6, R7 and R8 are all connected to the 3.3V power supply terminal.

[0059] like Figure 4 、 Figure 7 and Figure 8 As shown, the sensor interface module 7 to be tested includes interface P1, interface P2, sensor interface GAS1, sensor interface GAS2, sensor interface GAS3, sensor interface GAS4, sensor interface GAS5, sensor interface GAS6, sensor interface GAS7, sensor interface GAS8, sensor interface GAS9 and sensor interface GAS10;

[0060] The first pin, the second pin, the third pin, the fourth pin and the fifth pin of the interface P1 are connected to the 40th pin, the 38th pin, the 37th pin, the 34th pin and the 33rd pin of the MCU U1 respectively;

[0061] The first pin, the second pin, the third pin, the fourth pin and the fifth pin of the interface P2 are connected to the 32nd pin, the 31st pin, the 30th pin, the 29th pin and the 28th pin of the MCU U1 respectively;

[0062] The first, second, third, fourth, and fifth pins of interface P1 are connected to the V pins of sensor interface GAS5, sensor interface GAS4, sensor interface GAS3, sensor interface GAS2, and sensor interface GAS1, respectively; the VCC pins of sensor interface GAS5, sensor interface GAS4, sensor interface GAS3, sensor interface GAS2, and sensor interface GAS1 are all connected to the 5V power supply terminal, and the GND pins are all grounded;

[0063] The first pin, second pin, third pin, fourth pin and fifth pin of interface P2 are respectively connected to the V pins of sensor interface GAS10, sensor interface GAS9, sensor interface GAS8, sensor interface GAS7 and sensor interface GAS6; the VCC pins of sensor interface GAS10, sensor interface GAS9, sensor interface GAS8, sensor interface GAS7 and sensor interface GAS6 are all connected to the 5V power supply terminal, and the GND pins are all grounded.

[0064] like Figure 4 As shown, the standard sensor interface module 5 includes a standard sensor interface H1 , a VCC pin of the standard sensor interface H1 is connected to a 5V power supply terminal, an L pin is connected to the 21st pin of the MCU U1 , and a GND pin is grounded.

[0065] like Figure 4 As shown, the electronic valve interface module 8 includes a valve interface H2, a VCC pin of the valve interface H2 is connected to a 5V power supply terminal, a CON pin is connected to the 27th pin of the MCU U1, and a GND pin is grounded.

[0066] like Figure 4 and Figure 5 As shown, the display screen interface module 6 includes a display screen 11 interface A1, a display screen 11 interface A2, a transistor Q1, a resistor R4, a resistor R5, a capacitor C4 and a capacitor C5, and a current limiting protection module for supplying power to the display screen 11 interface A2;

[0067] The first pin of the display screen 11 interface A1 is connected to the 3.3V power terminal, the second pin of the display screen 11 interface A1 is connected to the ninth pin of the display screen 11 interface A2, and the eighth pin is grounded;

[0068] The second pin, third pin, fourth pin, sixth pin and seventh pin of the interface A1 of the display screen 11 are connected to the seventeenth pin, eighteenth pin, twentieth pin, fifteenth pin and sixteenth pin of the MCU U1 respectively;

[0069] The second pin of the interface A2 of the display screen 11 is connected to the third pin of the transistor Q1, the first pin of the transistor Q1 is connected to one end of the resistor R4 and the resistor R5, the other end of the resistor R4 is left unconnected, the other end of the resistor R5 is grounded and the second pin of the transistor Q1; the third pin of the interface A2 of the display screen 11 is connected to the fourth pin, and the third pin is connected to the current limiting protection module, as well as one end of the capacitor C4 and the capacitor C5, and the other ends of the capacitor C4 and the capacitor C5 are both grounded.

[0070] like Figure 6 As shown, the current limiting protection module includes a resistor R3, one end of the resistor R3 is connected to the 3.3V power terminal, and the other end is connected to the third pin of the interface A2 of the display screen 11, for protecting the interface A2 of the display screen 11.

[0071] like Figure 1 and Figure 2 As shown, in order to quickly discharge the gas in the detection box 1 after the detection is completed, a plurality of fans 12 are fixedly installed in the detection box 1, and a fan interface module connected to the number of fans 12 is provided on the detection board;

[0072] like Figure 4 As shown, the fan interface module includes a fan interface H3 and a fan interface H4;

[0073] The first pin of the fan interface H3 is connected to the 42nd pin of the MCU U1, and the first pin of the fan interface H4 is connected to the 41st pin of the MCU U1;

[0074] The second pin of the fan interface H3 is connected to the second pin of the fan interface H4 and is grounded.

[0075] The gas sensor detection device provided by the utility model can be used to detect a single gas sensor to be tested, and can also be used to detect ten gas sensors to be tested at the same time;

[0076] When testing a single gas sensor to be tested, connect the gas sensor to be tested to any interface among the sensor interfaces GAS1 to GAS10. When testing ten gas sensors to be tested at the same time, connect the ten gas sensors to be tested to the interfaces among the sensor interfaces GAS1 to GAS10 in sequence.

[0077] Connect the standard sensor to the standard sensor interface module 5;

[0078] The MCU single-chip computer U1 controls the electronic valve 10 to open through the electronic valve 10 interface H2, so that the gas in the gas cylinder 9 enters the detection box 1, and the gas concentration in the detection box 1 is detected by the gas sensor to be tested and the standard sensor. The concentration value detected by the gas sensor to be tested and the concentration value detected by the standard sensor are uploaded to the MCU single-chip computer U1. After the MCU single-chip computer U1 compares the concentration value detected by the gas sensor to be tested and the concentration value detected by the standard sensor, if the error is within the allowable range, the display screen 11 outputs "passed"; otherwise, the display screen 11 outputs "failed";

[0079] After the detection is completed, the MCU U1 drives the electronic valve 10 to close the electronic valve 10 and controls the fan 12 to rotate so that the gas in the detection box 1 can be quickly diffused.

[0080] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention shall be covered by the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A gas sensor detection device, characterized in that: The invention comprises a detection box (1) with an opening on one side, a detection base plate (2) provided in the detection box (1), an MCU module (3), a voltage conversion module (4) provided on the detection base plate (2), and a standard sensor interface module (5) connected to the MCU module (3) and the voltage conversion module (4), a sensor interface module to be tested (7), an electronic valve interface module (8), and a display screen interface module (6); The standard sensor interface module (5) is electrically connected to a standard sensor, and the gas sensor to be tested is electrically connected to the sensor interface module (7); A display screen (11) is fixedly mounted on the outer wall of the detection box (1), and the display screen (11) is electrically connected to the display screen interface module (6); A gas bottle (9) is provided on the outside of the detection box (1), the bottle mouth of the gas bottle (9) extends into the interior of the detection box (1), and an electronic valve (10) is provided at the bottle mouth, and the electronic valve (10) is electrically connected to the electronic valve interface module (8).

2. The gas sensor detection device according to claim 1, characterized in that: The voltage conversion module (4) comprises a voltage conversion chip V1, a Vin pin of the voltage conversion chip V1 is connected to a 5V power supply terminal and one end of a capacitor C6, and the other end of the capacitor C6 is grounded; The Vout pin of the voltage conversion chip V1 is connected to a 3.3V power supply terminal, one end of the capacitor C7 and the capacitor C8, and the other ends of the capacitors C7 and C8 are connected and connected to the GND pin of the voltage conversion chip V1.

3. The gas sensor detection device according to claim 2, characterized in that: The MCU module (3) includes an MCU single chip computer U1; The first pin of the MCU U1 is connected to the cathode of the diode D2 and the diode D3, and one end of the capacitor C1; the anode of the diode D2 is connected to the 3.3V power supply terminal; the anode of the diode D3 is connected to the cathode of the Schottky diode; the other end of the capacitor C1 is grounded and connected to the anode of the Schottky diode D1; The fifth pin of the MCU microcontroller U1 is connected to the passive crystal oscillator Y1, the resistor R1, one end of the capacitor C2, the other end of the capacitor C2 is grounded, and one end of the capacitor C3, the other end of the capacitor C3 is connected to the other end of the passive crystal oscillator Y1, the other end of the resistor R1, and the sixth pin of the MCU microcontroller U1; The eighth pin of the MCU U1 is grounded, and one end of the capacitor C4 and the capacitor C5, and the other ends of the capacitor C4 and the capacitor C5 are connected to one end of the resistor R2 and the ninth pin of the MCU U1, and the other end of the resistor R2 is connected to the 3.3V power supply terminal; The 46th pin, the 45th pin and the 43rd pin of the MCU U1 are connected to the cathodes of the light-emitting diode LED1, the light-emitting diode LED2 and the light-emitting diode LED3 respectively; The anodes of the light-emitting diodes LED1, LED2 and LED3 are connected to one end of the resistors R6, R7 and R8 respectively, and the other ends of the resistors R6, R7 and R8 are all connected to the 3.3V power supply terminal.

4. The gas sensor detection device according to claim 2, characterized in that: The sensor interface module (7) to be tested comprises an interface P1 and an interface P2; The first pin, the second pin, the third pin, the fourth pin and the fifth pin of the interface P1 are connected to the 40th pin, the 38th pin, the 37th pin, the 34th pin and the 33rd pin of the MCU U1 respectively; The first pin, the second pin, the third pin, the fourth pin and the fifth pin of the interface P2 are respectively connected to the 32nd pin, the 31st pin, the 30th pin, the 29th pin and the 28th pin of the MCU U1; The first pin, second pin, third pin, fourth pin and fifth pin of the interface P1 are connected to the V pins of the sensor interface GAS5, sensor interface GAS4, sensor interface GAS3, sensor interface GAS2 and sensor interface GAS1 respectively; the VCC pins of the sensor interface GAS5, sensor interface GAS4, sensor interface GAS3, sensor interface GAS2 and sensor interface GAS1 are all connected to the 5V power supply terminal, and the GND pins are all grounded; The first pin, second pin, third pin, fourth pin and fifth pin of the interface P2 are respectively connected to the V pins of the sensor interface GAS10, sensor interface GAS9, sensor interface GAS8, sensor interface GAS7 and sensor interface GAS6; the VCC pins of the sensor interface GAS10, sensor interface GAS9, sensor interface GAS8, sensor interface GAS7 and sensor interface GAS6 are all connected to the 5V power supply terminal, and the GND pins are all grounded.

5. The gas sensor detection device according to claim 2, characterized in that: The standard sensor interface module (5) comprises a standard sensor interface H1, a VCC pin of the standard sensor interface H1 is connected to a 5V power supply terminal, an L pin is connected to the twenty-first pin of the MCU single chip computer U1, and a GND pin is grounded.

6. The gas sensor detection device according to claim 2, characterized in that: The electronic valve interface module (8) comprises a valve interface H2, a VCC pin of the valve interface H2 is connected to a 5V power supply terminal, a CON pin is connected to the twenty-seventh pin of the MCU single chip computer U1, and a GND pin is grounded.

7. The gas sensor detection device according to claim 2, characterized in that: The display screen interface module (6) includes a display screen (11) interface A1 and a display screen (11) interface A2, and a current limiting protection module for supplying power to the display screen (11) interface A2; The first pin of the display screen (11) interface A1 is connected to a 3.3V power supply terminal, the second pin of the display screen (11) interface A1 is connected to the ninth pin of the display screen (11) interface A2, and the eighth pin is grounded; The second pin, the third pin, the fourth pin, the sixth pin and the seventh pin of the display screen (11) interface A1 are respectively connected to the seventeenth pin, the eighteenth pin, the twentieth pin, the fifteenth pin and the sixteenth pin of the MCU single chip computer U1 in a one-to-one correspondence; The second pin of the interface A2 of the display screen (11) is connected to the third pin of the transistor Q1, the first pin of the transistor Q1 is connected to one end of the resistor R4 and the resistor R5, the other end of the resistor R4 is connected to no connection, the other end of the resistor R5 is connected to the ground and the second pin of the transistor Q1; the third pin of the interface A2 of the display screen (11) is connected to the fourth pin, and the third pin is connected to the current limiting protection module, and one end of the capacitor C4 and the capacitor C5, and the other ends of the capacitor C4 and the capacitor C5 are both grounded.

8. The gas sensor detection device according to claim 7, characterized in that: The current limiting protection module includes a resistor R3, one end of the resistor R3 is connected to the 3.3V power supply terminal, and the other end is connected to the third pin of the interface A2 of the display screen (11).

9. The gas sensor detection device according to claim 2, characterized in that: A plurality of fans (12) are fixedly installed in the detection box (1), and a fan interface module connected to the fans (12) is provided on the detection board; The fan interface module includes a fan interface H3 and a fan interface H4; The first pin of the fan interface H3 is connected to the 42nd pin of the MCU U1, and the first pin of the fan interface H4 is connected to the 41st pin of the MCU U1; The second pin of the fan interface H3 is connected to the second pin of the fan interface H4 and is grounded.

Images