Daily checking device for exhaled gas alcohol tester

Abstract

The invention relates to an exhaled gas alcohol tester daily checking device which comprises a machine shell, a detection table on the machine shell, a camera shooting assembly, a control unit and a standard gas cylinder used for storing an alcohol gas standard substance, the standard gas cylinder is communicated with a gas inlet of an electronic flowmeter through a gas outlet pipeline, and a gas outlet of the electronic flowmeter is communicated with a gas blowing pipeline. One end of the air blowing pipeline is connected with an air outlet of the electronic flowmeter, the other end of the air blowing pipeline is provided with an air blowing port, a lens of the camera shooting assembly is aligned with the detection table, the detected alcohol tester detects and displays the alcohol concentration of gas blown out by the air blowing port, and the camera shooting assembly shoots the detected alcohol tester to obtain a picture with the alcohol concentration value. The alcohol tester detection system reads the alcohol concentration value displayed on the picture and performs data analysis and calculation, daily verification can be performed on the exhaled gas alcohol tester at any time or according to needs, it is guaranteed that the exhaled gas alcohol tester is qualified during use, the accuracy of a detection result is guaranteed, and the situations of false detection and missing detection are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of breath alcohol tester detection and calibration, and in particular to a daily verification device for a breath alcohol tester. Background Art

[0002] The breath alcohol tester, also known as the breath alcohol detector, is an important measuring instrument for law enforcement traffic police to conduct preliminary screening of drivers driving under the influence. It can effectively identify whether the driver is driving under the influence. It can also be used in other situations to detect the alcohol content in the human body's exhaled gas to avoid casualties and major property losses.

[0003] In order to ensure the accuracy of the test results of the breath alcohol tester, the breath alcohol tester must be calibrated before leaving the factory. At the same time, it must also be periodically calibrated in accordance with the national metrological verification regulations JJG657-2019 "Exhaled Breath Alcohol Content Tester". The calibration cycle shall not exceed 6 months, and the tester can only be used after passing the calibration. Moreover, according to the national metrological verification regulations JJG657-2019 "Exhaled Breath Alcohol Content Tester", the indication error, repeatability, drift and anti-interference ability of the tested breath alcohol tester are necessary calibration items. When collecting data, the tested breath alcohol tester is used to test ethanol standard gases of various concentrations, and each concentration of ethanol standard gas is tested at least 10 times to obtain the average value to ensure the reliability of the calibration results. The calibration is time-consuming and highly professional, and must be carried out in a specialized measurement unit.

[0004] However, existing breathalyzers are mostly used by traffic police on duty. Due to the influence of the external environment, collisions, and frequent use, the instruments often fail to measure accurately before the calibration time. This leads to false detection and missed detection, which affects the efficiency of traffic police enforcement, causes unnecessary disputes, and also poses certain safety risks. Therefore, daily verification of breathalyzers is very necessary. It is necessary to develop a daily verification device for breathalyzers to ensure the accuracy and reliability of the instrument's values. Summary of the Invention

[0005] In view of this, in order to overcome the shortcomings of the existing technical problems, the present invention provides a daily verification device for exhaled gas alcohol testers. The verification device can be placed in the traffic police department to perform daily verification of the exhaled gas alcohol testers, ensuring that the exhaled gas alcohol testers are qualified when used and reducing false detections and missed detections during use.

[0006] To achieve the above objectives, the technical solutions provided by the present invention are: A daily verification device for a breath alcohol tester, characterized by: It includes a casing, a detection platform arranged on the casing, A standard gas cylinder is provided in the casing, and is used to store ethanol gas standard substances. The gas outlet of the standard gas cylinder is connected to the gas inlet of the electronic flow meter through the gas outlet pipeline, and the gas outlet of the electronic flow meter is connected to the air blowing pipeline. One end of the air blowing pipeline is connected to the gas outlet of the electronic flow meter, and the other end of the air blowing pipeline passes through the casing and is provided with an air blowing port. The air blowing port corresponds to the detection platform on the casing, and the casing is provided with a camera assembly, and the lens of the camera assembly is aimed at the detection platform, and the camera assembly collects image data of the alcohol tester under inspection on the detection platform. A control unit is provided in the casing, and the control unit is electrically connected to the data analysis and display device. The camera component is electrically connected to the data analysis and display device. An alcohol tester detection system is installed in the data analysis and display device. The alcohol tester detection system has an image receiving and recognition module, a data processing module, a control module and a data receiving and display module. The image receiving and recognition module recognizes the picture captured by the camera component and extracts the alcohol concentration value displayed by the alcohol tester under inspection in the picture. The data processing module analyzes and calculates the alcohol concentration value proposed by the image recognition module. The control module is used to send control instructions to the control unit. The data receiving and display module is used to receive and display data information feedback from the control unit.

[0007] Preferably, a purge pump is further included, wherein the air outlet of the purge pump is connected to the air blowing pipeline through a pipeline, the air inlet of the air blowing pump is connected to the atmosphere, and an air filter is provided on the air inlet of the air blowing pump.

[0008] Preferably, a plurality of standard gas cylinders are provided in the casing, the ethanol concentrations of the ethanol gas standard substances in the plurality of standard gas cylinders are different, the gas outlets of the plurality of standard gas cylinders are connected to the gas inlet of the electronic flow meter through gas outlet pipes respectively, and a control valve is provided on the gas outlet pipe.

[0009] Preferably, when the alcohol tester under test detects the alcohol concentration of the ethanol gas standard substance blown out of the air port, the ethanol gas standard substance output by the standard gas cylinder of each concentration is tested 3 to 5 times.

[0010] Preferably, a pressure relief valve and an electronic pressure gauge are provided on the gas outlet of the standard gas cylinder.

[0011] Preferably, a heating device and a temperature sensor are provided on the air blowing pipeline, and the temperature sensor is arranged on the air blowing pipeline between the heating device and the air blowing port.

[0012] Preferably, a check valve is provided on the air blowing pipeline, and the check valve is arranged on the air blowing pipeline between the heating device and the air blowing port.

[0013] Preferably, the data analysis and display device is a PC or a mobile phone.

[0014] Preferably, the control unit includes a control circuit board, a controller arranged on the control circuit board, a power conversion module electrically connected to the controller, a data communication module, a temperature control module, a pressure control module and a flow control module. The power conversion module is electrically connected to a power source provided in the housing, and the data communication module is electrically connected to a data analysis and display device. The temperature control module is electrically connected to the temperature sensor and the heating device. The temperature sensor detects the temperature information of the gas in the blowing pipeline, and the temperature control module controls and adjusts the heating device according to the temperature information. The pressure control module is electrically connected to the pressure relief valve and the electronic pressure gauge. The electronic pressure gauge detects the gas pressure flowing out of the standard gas cylinder. The pressure control module controls the opening and closing and the opening size of the pressure relief valve according to the gas pressure. The flow control module is electrically connected to the electronic flow meter and the control valve. The electronic flow meter detects the gas flow rate flowing through the valve. The flow control module controls the opening and closing and opening size of the control valve according to the gas flow rate detected by the electronic flow meter. Preferably, the control unit further comprises a purge control module electrically connected to the controller, the purge control module is electrically connected to the purge pump, and the purge control module controls the opening and closing of the purge pump. The beneficial effects of the present invention are:

[0015] 1. The device of the present invention can be placed in the traffic police department to conduct daily inspections of the breath alcohol tester. The breath alcohol tester can be inspected at any time or as needed to ensure that the breath alcohol tester is qualified when used, ensure the accuracy of the drunk driving test results, and effectively reduce false detections and missed detections during use.

[0016] 2. When the alcohol tester under inspection is routinely checked by the present invention, when the alcohol tester under inspection detects the alcohol concentration of the ethanol gas standard substance blown out of the blowhole, the ethanol gas standard substance output by the standard gas cylinder of each concentration is detected 3 to 5 times, which is far less than the number of detections of at least 10 times stipulated in the national metrological verification regulations JJG657-2019 "Exhaled Gas Alcohol Content Detector", which can effectively shorten the detection time, reduce labor intensity, and reduce detection costs.

[0017] 3. The control unit of the present invention can realize automatic control and adjustment of the temperature, flow rate and pressure test conditions of the alcohol tester under inspection during daily inspection. The control unit cooperates with the data analysis and display device to effectively improve the degree of automation of daily inspection of the exhaled gas alcohol tester, thereby making the present invention simple and easy to operate, and does not require very professional technicians to operate, saving labor and reducing costs.

[0018] 4. The setting of the purge pump of the present invention uses filtered air to purge the pipeline, which can effectively and automatically clean the pipeline. When replacing ethanol gas standard substances of different concentrations, the gas residue in the pipeline is removed by purge to avoid mutual contamination and ensure the accuracy of daily verification results. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the verification device of the present invention; Figure 2 Schematic diagram of the control principle of the control unit of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below with reference to the accompanying drawings: like Figure 1 and Figure 2As shown, a device for routine inspection of breath alcohol testers comprises a housing 1, a test platform 2 mounted on the housing 1, the test platform 2 being used to place a breath alcohol tester 16 under inspection. The housing 1 houses multiple standard gas cylinders containing ethanol gas standard substances having varying ethanol concentrations. Each standard gas cylinder is equipped with a pressure relief valve 7 and an electronic pressure gauge 8 at its outlet. The outlets of the multiple standard gas cylinders are connected to the air inlet of an electronic flowmeter 10 via outlet pipes 9, each of which is equipped with a control valve. In this embodiment, two standard gas cylinders are provided in the casing 1, namely the first standard gas cylinder 3 and the second standard gas cylinder 4. Both standard gas cylinders store ethanol gas standard substances in nitrogen. The ethanol gas concentration of the ethanol gas standard substance in nitrogen in the first standard gas cylinder 3 is 0.1 mg / L. A first control valve 5 is provided on the gas outlet pipe 9 connected to the electronic flowmeter 10. The ethanol gas concentration of the ethanol gas standard substance in nitrogen in the second standard gas cylinder 4 is 0.4 mg / L. A second control valve 6 is provided on the gas outlet pipe 9 connected to the electronic flowmeter 10. The gas outlet of the electronic flowmeter 10 is connected to the blowing pipe 11. One end of the blowing pipe 11 is connected to the gas outlet of the electronic flowmeter 10, and the other end of the blowing pipe 11 passes through the casing. 1 and is provided with an air outlet 12, which corresponds to the detection table 2 on the casing 1. The air blowing pipeline 11 is provided with a heating device 19, a temperature sensor 20 and a check valve 21. The heating device 19, the temperature sensor 20 and the check valve 21 are arranged in sequence along the gas flow direction from the electronic flow meter 10 of the air blowing pipeline 11 to the air blowing port 12. The casing 1 is provided with a camera component 13, the lens of the camera component 13 is aimed at the detection table 2, and the camera component 13 collects image data of the alcohol tester 16 under inspection on the detection table 2. A purge pump 17 is provided in the casing 1, and the air outlet of the purge pump 17 is connected to the air blowing pipeline 11 through a pipeline. The air inlet of the purge pump 17 is connected to the atmosphere, and an air filter 18 is provided on the air inlet of the purge pump 17.

[0021] A control unit 14 is provided in the casing 1, and the control unit 14 is electrically connected to the data analysis and display device 15. The camera component 13 is electrically connected to the data analysis and display device 15. An alcohol tester detection system is installed in the data analysis and display device 15. The alcohol tester 16 to be tested is placed on the detection table 2 to detect and display the alcohol concentration of the ethanol gas standard substance blown out of the blowing port 12. The ethanol gas standard substance output by the standard gas cylinder of each concentration is tested 3 to 5 times. The alcohol tester detection system has an image receiving and recognition module, a data processing module, a control module and a data receiving and display module. The image receiving and recognition module recognizes the picture captured by the camera component 13, extracts the alcohol concentration value displayed by the alcohol tester 16 to be tested in the picture, and the data processing module analyzes and calculates the alcohol concentration value proposed by the image recognition module. The control module is used to send control instructions to the control unit 14, and the data receiving and display module is used to receive and display data information feedback from the control unit 14.

[0022] The data analysis and display device 15 is a PC computer connected to the housing 1, or the PC computer is external. The data analysis and display device 15 can also be a smart phone with an alcohol tester detection APP software installed in the smart phone.

[0023] The control unit 14 includes a control circuit board 30, a controller 22 provided on the control circuit board 30, a power conversion module 23 electrically connected to the controller 22, a data communication module 24, a temperature control module 25, a pressure control module 26, a flow control module 27 and a purge control module 29. The power conversion module 23 is electrically connected to a power supply 28 provided in the housing 1, the data communication module 24 is electrically connected to the data analysis and display device 15, the temperature control module 25 is electrically connected to the temperature sensor 20 and the heating device 19, the temperature sensor 20 detects the gas temperature information in the blowing pipeline 11, and the temperature control module 25 adjusts the pressure according to the temperature. The information controls and adjusts the heating device 19. The pressure control module 26 is electrically connected to the pressure relief valve 7 and the electronic pressure gauge 8. The electronic pressure gauge 8 detects the gas pressure flowing out of the standard gas cylinder. The pressure control module 26 controls the opening and closing of the pressure relief valve 7 and the opening size according to the gas pressure. The flow control module 27 is electrically connected to the electronic flow meter 10 and the control valve. The electronic flow meter 10 detects the gas flow flowing through. The flow control module 27 controls the opening and closing of the control valve and the opening size according to the gas flow detected by the electronic flow meter 10. The purge control module 29 is electrically connected to the purge pump 17. The purge control module 29 controls the opening and closing of the purge pump 17.

[0024] During routine inspection of the breath alcohol tester, the power supply 28 is turned on, the PC, the purge pump 17 and other components are powered on and in communication, the breath alcohol tester detection system installed in the PC is turned on, and then the heating device 19 is started to preheat the pipe. When it reaches the set preheating temperature, the breath alcohol tester 16 is placed on the test table 2, with the test end of the breath alcohol tester 16 corresponding to the breath port 12. The breath alcohol tester 16 is then inspected daily, and the inspection steps are as follows: S1, start the purge pump 17, use the purge pump 17 to extract air filtered by the air filter 18, the air is pressurized by the purge pump 17 and enters the air blowing pipeline 11, and the filtered air is used to purge the air blowing pipeline 11. When the purge time reaches the set time, the purge pump 17 is turned off.

[0025] S2, enter 0.1 mg / L in the detection software, open the pressure relief valve 7 and the first control valve 5 on the first standard gas cylinder 3, and the ethanol gas standard substance in the nitrogen in the first standard gas cylinder 3 flows out from the gas outlet pipe 9 and then enters the electronic flow meter 10. The electronic flow meter 10 measures the flow of the gas flowing through and transmits the flow information to the PC. After that, the ethanol gas standard substance enters the blowing pipe 11, and is then heated by the heating device 19, and then passes through the check valve 21, and finally blown out from the blowing port 12. The temperature sensor 20 detects the temperature of the heated gas and feeds the temperature information back to the PC. The PC adjusts the heating device 19 in real time according to the temperature information to meet daily verification needs. The alcohol tester 16 under inspection detects the alcohol concentration of the gas blown out from the blowing port 12, and the alcohol concentration value is displayed on the alcohol tester 16 under inspection.

[0026] S3. Start the camera assembly 13, which takes a picture of the alcohol tester 16 placed on the test table 2, obtains a photo with the alcohol concentration value, and transmits the photo to the PC. The alcohol tester detection system in the PC reads and records the alcohol concentration value displayed on the photo, and obtains the first alcohol concentration measurement value of the standard substance in the first standard gas cylinder 3.

[0027] S4. Repeat steps S1 to S3 twice, perform concentration detection on the ethanol gas standard substance in nitrogen with a concentration of 0.1 mg / L flowing out of the first standard gas cylinder 3 twice, and obtain the second and third alcohol concentration measurement values of the gas in the first standard gas cylinder 3.

[0028] S5. Repeat step S1 to purge the air blowing pipeline 11 again.

[0029] S6. Enter 0.4 mg / L in the detection software, open the pressure relief valve 7 and the second control valve 6 on the second standard gas cylinder 4, and the ethanol gas standard substance in the nitrogen in the second standard gas cylinder 4 flows out from the gas outlet pipe 9 and then enters the electronic flow meter 10. The electronic flow meter 10 measures the flow of the gas flowing through and transmits the flow information to the PC. Thereafter, the ethanol gas standard substance enters the blowing pipe 11, is heated by the heating device 19, passes through the check valve 21, and is finally blown out from the blowing port 12. The temperature sensor 20 detects the temperature of the heated gas and feeds the temperature information back to the PC. The PC adjusts the heating device 19 in real time according to the temperature information to meet the verification requirements. The alcohol tester 16 to be tested detects the alcohol concentration of the gas blown out from the blowing port 12, and the alcohol concentration value is displayed on the alcohol tester 16 to be tested.

[0030] S7. Repeat step S3. The alcohol tester detection system in the PC reads and records the first alcohol concentration measurement value of the standard substance in the second standard gas cylinder 4.

[0031] S8. Repeat steps S5 to S7 twice, perform concentration detection on the ethanol gas standard substance in nitrogen with a concentration of 0.4 mg / L flowing out of the second standard gas cylinder 4 twice, and obtain the second and third alcohol concentration measurement values of the gas in the second standard gas cylinder 4.

[0032] S9. Operate the PC alcohol tester detection system to analyze and calculate the 6 alcohol concentration measurement values recorded by it to obtain According to the national metrological verification regulations JJG657-2019 "Exhaled Gas Alcohol Content Detector", the accuracy of the test results of the tested alcohol tester 16 is judged, thereby determining whether the tested alcohol tester is qualified.

[0033] It should be noted that the above embodiments are illustrative of the technical solutions of the present invention rather than limiting thereof. Equivalent substitutions made by ordinary technicians in the relevant technical field or other modifications made based on the existing technology should be included in the scope of rights required by the present invention as long as they do not exceed the concept and scope of the technical solutions of the present invention.

Claims

1. A daily verification device for a breath alcohol tester, characterized by: It comprises a housing (1), a detection table (2) arranged on the housing (1), A standard gas cylinder is provided in the housing (1), and the standard gas cylinder is used to store ethanol gas standard substances. The gas outlet of the standard gas cylinder is connected to the gas inlet of the electronic flow meter (10) through the gas outlet pipe (9), and the gas outlet of the electronic flow meter (10) is connected to the air blowing pipe (11). One end of the air blowing pipe (11) is connected to the gas outlet of the electronic flow meter (10), and the other end of the air blowing pipe (11) passes through the housing (1) and is provided with an air blowing port (12). The air blowing port (12) corresponds to the detection table (2) on the housing (1). The housing (1) is provided with a camera assembly (13), and the lens of the camera assembly (13) is aimed at the detection table (2). The camera assembly (13) collects image data of the alcohol tester (16) to be tested on the detection table (2). A control unit (14) is provided in the housing (1), the control unit (14) is electrically connected to the data analysis and display device (15), the camera assembly (13) is electrically connected to the data analysis and display device (15), and an alcohol tester detection system is installed in the data analysis and display device (15). The alcohol tester detection system comprises an image receiving and identifying module, a data processing module, a control module and a data receiving and display module. The image receiving and identifying module identifies the image captured by the camera assembly (13) and extracts the alcohol concentration value displayed by the alcohol tester (16) in the image. The data processing module analyzes and calculates the alcohol concentration value proposed by the image recognition module. The control module is used to send a control instruction to the control unit (14), and the data receiving and display module is used to receive and display data information fed back by the control unit (14).

2. The daily verification device for the breath alcohol tester according to claim 1, characterized in that: A plurality of standard gas cylinders are provided in the housing (1), and the ethanol gas standard substances in the plurality of standard gas cylinders have different ethanol concentrations. The gas outlets of the plurality of standard gas cylinders are respectively connected to the gas inlet of the electronic flow meter (10) through gas outlet pipes (9), and a control valve is provided on the gas outlet pipes (9).

3. The daily verification device for a breath alcohol tester according to claim 2, characterized in that: When the alcohol tester (16) detects the alcohol concentration of the ethanol gas standard substance blown out of the blowing port (12), the ethanol gas standard substance output from the standard gas cylinder of each concentration is detected 3 to 5 times.

4. The daily verification device for a breath alcohol tester according to claim 1, characterized in that: It also includes a purge pump (17), the air outlet of the purge pump (17) is connected to the air blowing pipeline (11) through a pipeline, the air inlet of the purge pump (17) is connected to the atmosphere, and an air filter (18) is provided on the air inlet of the purge pump (17).

5. The daily verification device for a breath alcohol tester according to claim 1, characterized in that: A pressure relief valve (7) and an electronic pressure gauge (8) are provided on the gas outlet of the standard gas cylinder.

6. The daily verification device for a breath alcohol tester according to claim 1, characterized in that: The air blowing pipeline (11) is provided with a heating device (19) and a temperature sensor (20), and the temperature sensor (20) is arranged on the air blowing pipeline (11) between the heating device (19) and the air blowing port (12).

7. The daily verification device for a breath alcohol tester according to claim 1, characterized in that: A check valve (21) is provided on the air blowing pipeline (11), and the check valve (21) is arranged on the air blowing pipeline (11) between the heating device (19) and the air blowing port (12).

8. The daily verification device for a breath alcohol tester according to claim 1, characterized in that: The data analysis and display device (15) is a PC or a mobile phone.

9. The daily verification device for a breath alcohol tester according to any one of claims 1 to 8, characterized in that: The control unit (14) includes a control circuit board (30), a controller (22) arranged on the control circuit board (30), a power conversion module (23) electrically connected to the controller (22), a data communication module (24), a temperature control module (25), a pressure control module (26), and a flow control module (27). The power conversion module (23) is electrically connected to a power source (28) provided in the housing (1), and the data communication module (24) is electrically connected to a data analysis and display device (15). The temperature control module (25) is electrically connected to the temperature sensor (20) and the heating device (19). The temperature sensor (20) detects the temperature information of the gas in the blowing pipeline (11). The temperature control module (25) controls and adjusts the heating device (19) according to the temperature information. The pressure control module (26) is electrically connected to the pressure relief valve (7) and the electronic pressure gauge (8). The electronic pressure gauge (8) detects the pressure of the gas flowing out of the standard gas cylinder. The pressure control module (26) controls the opening and closing and the opening size of the pressure relief valve (7) according to the gas pressure. The flow control module (27) is electrically connected to the electronic flow meter (10) and the control valve. The electronic flow meter (10) detects the flow of gas flowing through the control valve. The flow control module (27) controls the opening and closing and the opening size of the control valve according to the gas flow detected by the electronic flow meter (10).

10. The daily verification device for a breath alcohol tester according to claim 9, characterized in that: The control unit (14) further includes a purge control module (29) electrically connected to the controller (22), wherein the purge control module (29) is electrically connected to the purge pump (17), and the purge control module (29) controls the opening and closing of the purge pump (17).

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