Electric signal detection device of alcohol sensor

Abstract

The utility model provides an electric signal detection device of alcohol sensor, including a case, a display panel, a controller, a wiring module, a detection module and a gas circuit module, the inside of the case is provided with a groove, the left side surface of the groove is vertically provided with a support plate, the support plate is fixedly provided with a cross bar, the wiring module is slidably arranged on the cross bar, and the detection module is provided with a gas circuit module. The detection module is mounted at the bottom of the groove; the air path module comprises a first air inlet, a second air inlet, an air outlet, a three-way air valve, a thermostat, an air pressure monitoring meter, nine air valves, a flow regulator, a compressor, a compression lever, a compression plate and an air cavity, and the thermostat, the air pressure monitoring meter, the nine air valves, the flow regulator, the compressor, the wiring module, the detection module and the display panel are electrically connected with the controller. By adopting the device disclosed by the utility model, automatic electric signal detection of the alcohol sensor sample can be realized, the accuracy of a test result is improved, and the working cost of operators and the material cost of an air source are reduced to a great extent.

Description

Technical Field

[0001] The utility model relates to the technical field of alcohol detection, in particular to an electric signal detection device of an alcohol sensor. Background Art

[0002] As a common industrial raw material, alcohol is widely used in the fields of food industry, fine chemical synthesis, energy production, etc. In life, drinking alcohol will reduce tactile ability and increase mental excitement, thus affecting some judgment and operating ability, and also causing some blurred vision. Therefore, drunk driving is very likely to cause some traffic accidents, resulting in damage to the safety of life and property. The alcohol detector is used to detect whether the driver has consumed alcohol or consumed too much alcohol during the journey, thereby effectively reducing the occurrence of major traffic accidents, which is crucial to maintaining traffic safety order.

[0003] The alcohol detector uses the alcohol sensor to detect the alcohol concentration. The alcohol sensor is an electrochemical gas sensor. It mainly detects the gas concentration by diffusing the gas to be tested into the electrolyte and then undergoing a redox reaction with the electrode. Therefore, the performance of the alcohol sensor is one of the core technologies for realizing real-time online detection of alcohol concentration. The alcohol sensor based on the electrochemical principle mainly diffuses the gas to be tested into the electrolyte. It generates current through the redox reaction of chemical substances with the electrode surface, thereby obtaining a stable and accurate measurement electrical signal to detect the alcohol concentration in the gas. In the actual production process, it is difficult to ensure that the performance of each sample meets the expected performance requirements when obtaining batch alcohol sensor samples under the corresponding process. Therefore, each sample needs to be tested for the performance of the electrical signal before leaving the factory to ensure that the detection value of the alcohol detector with it as the core component is accurate and reliable.

[0004] In traditional testing, the electrical conductors of the alcohol sensor samples are usually connected to the electrochemical detection module to form a loop, and then a certain concentration of alcohol gas is used to purge the alcohol sensor samples, thereby generating a chemical reaction to obtain the corresponding electrochemical signal. If the electrochemical signal reaches the expected value, it is deemed qualified and installed in the corresponding equipment. However, this process is manually operated, the process operation is cumbersome, there are operating errors, and the labor cost is greatly increased. And because the purge time of each sample is also manually controlled, it is difficult to ensure that it is the same. The test value obtained will fluctuate within a certain range, making it difficult to monitor the repeatability of the alcohol sensor samples in real time. It needs to be installed in the equipment for performance testing, which increases the possibility of rework to a certain extent. At the same time, due to the continuous purge during the test, the gas source is consumed to a certain extent, which increases the cost of detection. Utility Model Content

[0005] The technical problem to be solved by the present utility model is to provide an electrical signal detection device for an alcohol sensor, which can realize the automatic electrical signal detection of alcohol sensor samples, improve the accuracy of test results, and greatly reduce the working cost of operators and the material cost of the gas source.

[0006] The present utility model is realized as follows: An electrical signal detection device for an alcohol sensor includes a chassis. A display panel, a controller, a wiring module, a detection module, and a gas circuit module are provided on the chassis. A groove is formed inside the chassis. A support plate is vertically provided on the left side surface of the groove. A cross bar is fixed on the support plate. The wiring module is slidably arranged on the cross bar. The detection module is installed at the bottom of the groove.

[0007] The wiring module includes a moving block, a top plate, a circuit contact bar, and a proximity emitter. The upper surface of the circuit contact bar is fixedly connected to the lower surface of one end of the top plate. The upper surface of the moving block is connected to the lower surface of the other end of the top plate through a cylinder. The proximity emitter is installed below the top plate. A first conductive plate and a second conductive plate for positive and negative connections are provided below the circuit contact bar.

[0008] Four detection modules are arranged side by side at intervals along the direction of the cross bar. Each detection module is provided with a detection plate. A pressure sensor, a circuit fixing block, a proximity receiver, and a clamp for fixing the alcohol sensor sample are provided on the detection plate. The proximity receiver is matched with the wiring emitter. The pressure sensor is located on the upper surface of the detection plate. The circuit fixing block is located on the upper surface of the pressure sensor and is matched with the circuit contact block. A first wiring point and a second wiring point for positive and negative connections are provided on the circuit fixing block.

[0009] The gas circuit module includes a first air inlet, a second air inlet, an air outlet, a three-way air valve, a thermostat, a barometric pressure monitor, a first air valve, a second air valve, a third air valve, a fourth air valve, a fifth air valve, a sixth air valve, a seventh air valve, an eighth air valve, a ninth air valve, a flow regulator, a compressor, a compression bar, a compression plate, and an air cavity. The first air inlet and the second air inlet are connected to one end of the thermostat through the three-way air valve. The other end of the thermostat is respectively connected to the barometric pressure monitor, the first air valve, the second air valve, the third air valve, the fourth air valve, and the flow regulator. The openings of the gas paths at the other ends of the first air valve, the second air valve, the third air valve, and the fourth air valve are located above the detection plate. The compressor is connected to the compression plate on the inner wall of the air cavity through the compression bar. The gas pipelines of the air cavity are respectively connected to the fifth air valve, the sixth air valve, the seventh air valve, the eighth air valve, and the ninth air valve. The openings of the gas paths at the other ends of the fifth air valve, the sixth air valve, the seventh air valve, and the eighth air valve are located above the detection plate. The other end of the ninth air valve is respectively connected to the flow regulator and the air outlet.

[0010] The thermostat, barometric pressure monitor, first air valve, second air valve, third air valve, fourth air valve, fifth air valve, sixth air valve, seventh air valve, eighth air valve, ninth air valve, flow regulator, compressor, wiring module, detection module, and display panel are respectively electrically connected to the controller.

[0011] Further, a machine cover is provided above the chassis groove.

[0012] Further, a connecting column is provided on the cylinder of the moving block, and the top plate is provided with a hollow structure matching the connecting column.

[0013] Further, a roller and a motor are also provided in the chassis. The roller is arranged parallel to the cross bar. The moving block is provided with a threaded hole for passing through the roller. One end of the roller is connected to the motor, and the motor is electrically connected to the controller. The motor drives the self-rotation of the roller to control the horizontal movement of the moving block along the cross bar.

[0014] Further, an extension wire is provided on one side of the wire fixing block. One end of the extension wire is connected to the second wiring point, and the other end is provided with a circuit clip.

[0015] Further, the thermostat includes an insulating housing, a heating aluminum core, an air path long tube spirally arranged on the surface of the aluminum core, and a temperature control device outside the air path long tube.

[0016] Further, the first air valve and the fifth air valve are located on both sides of the same detection board and are used to connect the two ends of the air path of the same alcohol sensor sample. The second air valve and the sixth air valve are located on both sides of the same detection board and are used to connect the two ends of the air path of the same alcohol sensor sample. The third air valve and the seventh air valve are located on both sides of the same detection board and are used to connect the two ends of the air path of the same alcohol sensor sample. The fourth air valve and the eighth air valve are located on both sides of the same detection board and are used to connect the two ends of the air path of the same alcohol sensor sample.

[0017] The present utility model has the following advantages: The device of the present utility model can perform automated electrochemical performance tests on a batch of alcohol sensor samples, improving work efficiency. In addition, it ensures that the ventilation time and flow rate are consistent during each test, making the test results more accurate. At the same time, it also saves the gas source consumption to a certain extent and improves economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following further describes the present utility model with reference to the accompanying drawings in conjunction with embodiments.

[0019] Figure 1 It is a schematic structural diagram of an electrical signal detection device for an alcohol sensor of the present utility model;

[0020] Figure 2It is an enlarged schematic diagram of the circuit connection module of an electrical signal detection device for an alcohol sensor of the present utility model;

[0021] Figure 3 It is an enlarged schematic diagram of the detection module of an electrical signal detection device for an alcohol sensor of the present utility model;

[0022] Figure 4 It is an internal schematic diagram of an electrical signal detection device for an alcohol sensor of the present utility model;

[0023] Figure 5 It is a structural schematic diagram of a thermostat in the present utility model.

[0024] In the figure: 1. Chassis, 11. Display panel, 12. Machine cover, 13. Cross bar, 14. Support plate, 15. Roller, 16. Motor, 2. Wiring module, 21. Moving block, 211. Threaded hole, 22. Cylinder, 23. Connecting column, 24. Top plate, 25. Proximity emitter, 26. Circuit contact bar, 261. First conductive plate, 262. Second conductive plate, 3. Detection module, 30. Alcohol sensor sample, 31. Detection plate, 32. Clamp, 33. Proximity receiver, 34. Pressure sensor, 35. Circuit fixing block, 351. First connection point, 352. Second connection point, 36. Extension wire, 37. Circuit clip, 41. Three-way air valve, 42. Thermostat, 421. Insulating housing, 422. Heating aluminum core, 423. Airway long tube, 424. Temperature control device, 43. Air pressure monitoring table, 44. Flow regulator, 45. Compressor, 46. Compression bar, 47. Compression plate, 48. Air cavity, 49. Controller, Q1. First air inlet, Q2. Second air inlet, Q3. Air outlet, V1. First air valve, V2. Second air valve, V3. Third air valve, V4. Fourth air valve, V5. Fifth air valve, V6. Sixth air valve, V7. Seventh air valve, V8. Eighth air valve, V9. Ninth air valve. Specific embodiments

[0025] Please refer to Figures 1 to 5 As shown, the present utility model provides an electrical signal detection device for an alcohol sensor, including a chassis 1, a display panel 11, a controller 49, a wiring module 2, a detection module 3 and an air circuit module 4 are provided on the chassis 1, a groove is opened in the chassis 1, a support plate 14 is vertically arranged on the left side surface of the groove, a cross bar 13 is fixed on the support plate 14, the wiring module 2 is slidably arranged on the cross bar 13, and the detection module 3 is installed at the bottom of the groove;

[0026] The wiring module 2 includes a moving block 21, a top plate 24, a line contact bar 26 and a proximity transmitter 25. The upper surface of the line contact bar 26 is fixedly connected to the lower surface of one end of the top plate 24. The upper surface of the moving block 21 is connected to the lower surface of the other end of the top plate 24 through a cylinder 22. The proximity transmitter 25 is installed below the top plate 24. Below the line contact bar 26, there are a first conductive plate 261 and a second conductive plate 262 for positive and negative connections.

[0027] Four detection modules 3 are arranged side by side at intervals along the direction of the cross bar 13. Each detection module 3 is provided with a detection plate 31. The detection plate 31 is provided with a pressure sensor 34, a line fixing block 35, a proximity receiver 33 and a clamping plate 32 for fixing an alcohol sensor sample. The proximity receiver 33 is matched with the wiring transmitter 25. The pressure sensor 34 is located on the upper surface of the detection plate 31. The line fixing block 35 is located on the upper surface of the pressure sensor 34 and is matched with the line contact block 26. The line fixing block 35 is provided with a first wiring point 351 and a second wiring point 352 for positive and negative connections.

[0028] The gas circuit module 4 includes a first air inlet Q1, a second air inlet Q2, an air outlet Q3, a three-way valve 41, a thermostat 42, a pressure monitoring gauge 43, a first air valve V1, a second air valve V2, a third air valve V3, a fourth air valve V4, a fifth air valve V5, a sixth air valve V6, a seventh air valve V7, an eighth air valve V8, a ninth air valve V9, a flow regulator 44, a compressor 45, a compression bar 46, a compression plate 47 and an air cavity 48. The first air inlet Q1 and the second air inlet Q2 are connected to one end of the thermostat 42 through the three-way valve 41. The other end of the thermostat 42 is respectively connected to the pressure monitoring gauge 43, the first air valve V1, the second air valve V2, the third air valve V3, the fourth air valve V4 and the flow regulator 44. The openings of the gas paths at the other ends of the first air valve V1, the second air valve V2, the third air valve V3 and the fourth air valve V4 are located above the detection plate 31. The compressor 45 is connected to the compression plate 47 on the inner wall of the air cavity 48 through the compression bar 46. The air pipe paths of the air cavity 48 are respectively connected to the fifth air valve V5, the sixth air valve V6, the seventh air valve V7, the eighth air valve V8 and the ninth air valve V9. The openings of the gas paths at the other ends of the fifth air valve V5, the sixth air valve V6, the seventh air valve V7 and the eighth air valve V8 are located above the detection plate 31. The other end of the ninth air valve V9 is respectively connected to the flow regulator 44 and the air outlet Q3.

[0029] The thermostat 42, the air pressure monitor 43, the first air valve V1, the second air valve V2, the third air valve V3, the fourth air valve V4, the fifth air valve V5, the sixth air valve V6, the seventh air valve V7, the eighth air valve V8, the ninth air valve V9, the flow regulator 44, the compressor 45, the wiring module 2, the detection module 3, and the display panel 11 are respectively electrically connected to the controller 49.

[0030] In a specific embodiment, a machine cover 12 is provided above the groove of the chassis 1. When the machine cover 12 is opened, the empty groove can be seen.

[0031] In a specific embodiment, a connecting column 23 is provided on the cylinder 22 of the moving block 21, and the top plate 24 is provided with a hollow structure matching the connecting column 23. In this way, the top plate 24 can just be buckled on the cylinder 23, and the vertical up and down movement of the top plate 24 is driven by the movement of the cylinder 23.

[0032] In a specific embodiment, a roller 15 and a motor 16 are further provided in the chassis 1. The roller 15 is arranged parallel to the cross bar 13. A threaded hole 211 for passing through the roller 15 is provided on the moving block 21. One end of the roller 15 is connected to the motor 16. The motor 16 is electrically connected to the controller 49, and the motor 16 drives the self-rotation of the roller 15 to control the horizontal movement of the moving block 21 along the cross bar 13.

[0033] In a specific embodiment, an extension wire 36 is provided on one side of the circuit fixing block 35. One end of the extension wire 36 is connected to the second wiring point 352, and the other end is provided with a circuit clip 37.

[0034] In a specific embodiment, the thermostat 42 includes an insulating housing 421, a heating aluminum core 422, an air path long tube 423 spirally disposed on the surface of the aluminum core 422, and a temperature control device 424 outside the air path long tube.

[0035] In a specific embodiment, the first air valve V1 and the fifth air valve V5 are located on both sides of the same detection plate 31 and are used to connect the two ends of the air path of the same alcohol sensor sample 30. The second air valve V2 and the sixth air valve V6 are located on both sides of the same detection plate 31 and are used to connect the two ends of the air path of the same alcohol sensor sample 30. The third air valve V3 and the seventh air valve V7 are located on both sides of the same detection plate 31 and are used to connect the two ends of the air path of the same alcohol sensor sample 30. The fourth air valve V4 and the eighth air valve V8 are located on both sides of the same detection plate 31 and are used to connect the two ends of the air path of the same alcohol sensor sample 30.

[0036] The working principle and process of the present utility model are as follows:

[0037] Preparation stage: Connect an alcohol gas source with a certain concentration to be measured to the air inlet Q1. Place the alcohol sensor sample 30 to be measured on the detection board 31 and fix it with the clamping plate 32. The alcohol sensor sample 30 generally has two gas paths and two electrical wires. Connect the two gas paths of the alcohol sensor sample 30 to the gas valve openings on both sides of the corresponding detection board respectively. According to different models, if the two electrical wires of the alcohol sensor sample 30 are on the same side, the two electrical wires can be directly connected to the first wiring point 351 and the second wiring point 352 on the wiring fixing block 35 to form a closed circuit and power on the alcohol sensor sample 30. If the two electrical wires of the alcohol sensor sample 30 are not on the same side, one electrical wire is fixed on the first wiring point 351, and the other electrical wire is connected to the circuit clamp 37 to form a closed circuit and power on the alcohol sensor sample 30;

[0038] In the initial state, the compression plate is in contact with the bottom of the air chamber (the rightmost side). Close the first air valve V1, the second air valve V2, the third air valve V3, the fourth air valve V4, the fifth air valve V5, the sixth air valve V6, the seventh air valve V7, the eighth air valve V8 and the ninth air valve V9. The moving block 21 is located at the leftmost side of the crossbar 13. The flow regulator 44 is in the maximum flow state. The flow regulator is a kind of air valve that can set the flow rate;

[0039] Input the number and position number of the alcohol sensor sample 30 to be tested through the display panel 11, and set the movement range and movement speed of the compression plate 47 according to the required ventilation time and ventilation flow rate. Generally, the ventilation time can be set to 5 s, the ventilation flow rate can be set to 0.25 L / s, and the temperature of the thermostat 42 is controlled at 34 °C.

[0040] Testing stage: When testing the alcohol sensor sample 30, point the three-way air valve 41 to the first air valve Q1. The gas source is introduced from the air inlet Q1, and the air in the gas path of the device is discharged from the air outlet Q3. After ventilation for a certain time, reduce the gas flow rate of the flow regulator 44 (when the flow regulator is fully opened, it is used to remove the impurity gas in the device, and then it is reduced during the process, mainly to increase the air pressure in the pipeline and at the same time make sure there is enough air flow to the sample side), and turn on the gas path thermostat 42, and then continue to ventilate for a certain time. After the gas enters the gas path thermostat 42 from the air inlet Q1, the gas basically remains at 34 °C. The air pressure monitoring table 43 shows the pressure of the gas in the gas path. When the air pressure monitoring table 43 reaches a certain pressure, the next step can be carried out;

[0041] If a single test operation is performed on the sample to be tested, the start operation is carried out once through the control panel 11, the motor 16 starts, drives the roller 15 to rotate by itself, and at this time the moving block 21 starts to move to the right. When approaching directly above the proximity receiver 33 of the emitter 25 beside the alcohol sensor sample to be tested, the motor 16 stops running, and then the cylinder 22 starts to perform the compression operation. At this time, the top plate 24 will move vertically downward as the cylinder 22 compresses until the first conductive plate 261 and the second conductive plate 262 at the bottom of the line connection bar 26 respectively come into contact with the first connection point 351 and the second connection point 352 on the line fixing block 35. As the line contact bar 26 continues to move downward, when the pressure sensor 34 is subjected to the corresponding pressure and when the pressure reaches a certain value, the cylinder 22 stops running. At this time, the first conductive plate 261 and the first connection point 351 are basically completely engaged and close together, and the second conductive plate 262 and the second connection point 352 are also basically completely engaged and close together. The alcohol sensor sample 30 forms an electrical circuit through the electric wire. At the same time, the corresponding valve group (such as the first valve V1 and the fifth valve V5) is started simultaneously. The compressor 45 starts to draw out the compression bar 46 and drives the compression plate 47 to move to the left. The effective volume in the air chamber 48 gradually becomes larger. At this time, part of the gas is drawn in through the corresponding valve (such as V1), passes through the alcohol sensor sample 30, and then enters the air chamber 48. When the ventilation time ends, the controller 49 processes to obtain the electrical signal test value and exports it on the display panel 11. After that, the corresponding valve group (such as the first valve V1 and the fifth valve V5) is automatically closed, and at the same time the ninth valve V9 is opened. The compressor 45 restarts and moves the compression bar 46 to the bottom of the air chamber 48. At this time, the compression plate 47 discharges the gas in the air chamber 48. According to the preset time, the ninth valve V9 automatically closes. This time is generally defaulted to be equal to the ventilation time. At the same time, the cylinder 22 starts to perform the rising operation. At this time, the top plate 24 will move vertically upward as the cylinder 22 rises. After returning to the initial height, the cylinder 22 stops moving, and the motor 16 will automatically start, thereby driving the moving block 21 to move to the right. When approaching directly above the proximity receiver 33 of the emitter 25 directly above another detection plate 31, the motor 16 stops running, and then the cylinder 22 starts to perform the compression operation, and repeats the above operation for a single test operation on another alcohol sensor sample.

[0042] After all the sensor samples are tested, the top plate 24 will return to the initial position. At this time, the first motor 16 will start, driving the roller 15 to rotate counterclockwise, moving the moving block 21 to the initial position on the left, that is, located on the left side of the cross bar 22, the compression plate 41 is in the initial state, that is, in contact with the bottom of the air chamber 48, and the flow regulator 44 is in the maximum flow state. The current signal results of all sample tests can be obtained on the display panel 11.

[0043] If the test sample is repeatedly measured, set the number of repeated measurements of each alcohol sensor sample 30 through the display panel 11, and then operate according to the above-mentioned test steps for the test sample. After the single test of the alcohol sensor sample 30 is completed, automatically reopen the corresponding gas valve group (such as the first gas valve V1 and the fifth gas valve V5), and at the same time start the compressor 45 to move the compression plate 47 to the left and gradually increase the effective volume of the air chamber 48. Automatically close the corresponding gas valve group (such as the first gas valve V1 and the fifth gas valve V5) at the end of the ventilation time, and open the ninth gas valve V9. At the same time, start the compressor 45 to move the compression plate 47 to the right and gradually decrease the effective volume of the air chamber 48. Automatically close the ninth gas valve V9 after the gas in the air chamber 48 is discharged. Finally, according to the preset number of repetitions, conduct the measurement experiment for the corresponding number of times. The electrical signal test values are processed by the controller 49 and all exported on the display panel 11.

[0044] When it is necessary to measure the interfering gas for the alcohol sensor sample 30, input the ventilation time and ventilation flow rate for the interfering gas test according to the display panel 11. After the single test of the alcohol sensor sample 30 is completed, set the three-way valve 41 to point to the air inlet Q2 through the display panel 11. At this time, the interfering gas will flow into the device from the air inlet Q2. After ventilation for a period of time, start the interference test. At this time, the device operates according to the above-mentioned test steps for the test sample. The electrical signal test values are processed by the controller 49 and all exported on the display panel 11 to check whether the displayed value of the electrical signal is abnormal.

[0045] Through the above tests, the ventilation time and flow rate of each sample can be controlled to improve the test accuracy.

[0046] Although the specific embodiments of the present invention have been described above, those skilled in the art of this technology should understand that the specific embodiments we described are illustrative rather than used to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should all be covered within the scope protected by the claims of the present invention.

Claims

1. An electrical signal detection device for an alcohol sensor, characterized in that: It comprises a chassis, on which a display panel, a controller, a wiring module, a detection module and a gas path module are arranged, a groove is opened in the chassis, a support plate is vertically arranged on the left side of the groove, a horizontal bar is fixed on the support plate, the wiring module is slidably arranged on the horizontal bar, and the detection module is installed at the bottom of the groove; The wiring module includes a moving block, a top plate, a line contact bar and a proximity transmitter, the upper surface of the line contact bar is fixedly connected to the lower surface of one end of the top plate, the upper surface of the moving block is connected to the lower surface of the other end of the top plate through a cylinder, the proximity transmitter is installed below the top plate, and a first conductive plate and a second conductive plate for positive and negative electrode connection are provided below the line contact bar; Four detection modules are arranged side by side in intervals along the horizontal bar direction, and each detection module is provided with a detection board, on which a pressure sensor, a line fixing block, a proximity receiver and a clamping plate for fixing an alcohol sensor sample are provided, the proximity receiver matches with a wiring transmitter, the pressure sensor is located on the upper surface of the detection board, the line fixing block is located on the upper surface of the pressure sensor and matches with a line contact block, and the line fixing block is provided with a first wiring location and a second wiring location for connecting positive and negative electrodes; The air circuit module includes a first air inlet, a second air inlet, an air outlet, a three-way air valve, a thermostat, an air pressure monitoring meter, a first air valve, a second air valve, a third air valve, a fourth air valve, a fifth air valve, a sixth air valve, a seventh air valve, an eighth air valve, a ninth air valve, a flow regulator, a compressor, a compression lever, a compression plate and an air cavity. The first air inlet and the second air inlet are connected to one end of the thermostat through the three-way air valve, and the other end of the thermostat is respectively connected to the air pressure monitoring meter, the first air valve, the second air valve, the third air valve, the fourth air valve and the flow regulator. The air path of the air cavity is connected to the air regulator, the openings of the air paths at the other ends of the first air valve, the second air valve, the third air valve and the fourth air valve are located above the detection plate, the compressor is connected to the compression plate on the inner wall of the air cavity through a compression lever, the air pipeline of the air cavity is respectively connected to the fifth air valve, the sixth air valve, the seventh air valve, the eighth air valve and the ninth air valve, the openings of the air paths at the other ends of the fifth air valve, the sixth air valve, the seventh air valve and the eighth air valve are located above the detection plate, and the other end of the ninth air valve is respectively connected to the flow regulator and the air outlet; The thermostat, air pressure monitoring meter, first air valve, second air valve, third air valve, fourth air valve, fifth air valve, sixth air valve, seventh air valve, eighth air valve, ninth air valve, flow regulator, compressor, wiring module, detection module and display panel are electrically connected to the controller respectively.

2. The electrical signal detection device of an alcohol sensor according to claim 1, characterized in that: A machine cover is arranged above the chassis groove.

3. The electrical signal detection device of an alcohol sensor according to claim 1, characterized in that: A connecting column is provided on the cylinder of the moving block, and a hollow structure matching the connecting column is provided on the top plate.

4. The electrical signal detection device of an alcohol sensor according to claim 1, characterized in that: A roller and a motor are also provided in the chassis. The roller is arranged parallel to the horizontal bar. A threaded hole for passing the roller is provided on the moving block. One end of the roller is connected to the motor. The motor is electrically connected to the controller. The motor drives the self-rotation of the roller to control the horizontal movement of the moving block along the horizontal bar.

5. The electrical signal detection device of an alcohol sensor according to claim 1, characterized in that: An extension wire is arranged on one side of the line fixing block, one end of the extension wire is connected to the second wiring point, and the other end of the extension wire is arranged on a circuit clip.

6. The electrical signal detection device of an alcohol sensor according to claim 1, characterized in that: The thermostat comprises an insulating shell, a heating aluminum core, a long gas path tube spirally arranged on the surface of the aluminum core, and a temperature control device outside the long gas path tube.

7. The electrical signal detection device of an alcohol sensor according to claim 1, characterized in that: The first air valve and the fifth air valve are located on both sides of the same detection board, and are used to connect the two ends of the air path of the same alcohol sensor sample. The second air valve and the sixth air valve are located on both sides of the same detection board, and are used to connect the two ends of the air path of the same alcohol sensor sample. The third air valve and the seventh air valve are located on both sides of the same detection board, and are used to connect the two ends of the air path of the same alcohol sensor sample. The fourth air valve and the eighth air valve are located on both sides of the same detection board, and are used to connect the two ends of the air path of the same alcohol sensor sample.

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