Calibrating device for exhaled gas alcohol content detector
A technology of exhaled gas and verification device, used in biological testing, material inspection products, etc., to ensure accuracy and reliability
Inactive Publication Date: 2015-01-14
HENAN PROVINCE INST OF METROLOGY
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Problems solved by technology
Existing problems: There are many influencing factors in the gas distribution process, and the work efficiency is low; the gas state is dry gas, which is quite different from the actual use state of the breath alcohol content detector
Disadvantages: Indoor air circulation is used, the gas pressure and flow rate of the instrument are not easy to control, and the output standard gas volume is used based on experience
[0007] The third is ethanol standard gas in bottled air: the disadvantage is that the concentration is fixed, the standard value cannot be changed according to the instrument range, the validity period is short, and the cost of use is increased
Method used
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Embodiment Construction
[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0034] Such as figure 1 As shown, a testing device for exhaled alcohol content detectors includes a gas source 1, the gas source 1 adopts bottled clean air, and the gas outlet of the gas source 1 communicates with the gas generating system through the intake pipe 2, and the gas The generating system is connected to the exhaled gas alcohol content detector 4 through the outlet pipe 3, and the outlet pipe 3 is provided with a filter 10. The gas generating system includes a sealed container 5, a heating device 6 and an alcohol solution 7, and the sealed container 5 is provided with a Alcohol solution 7 is arranged, and the gas outlet end of air intake pipe 2 is arranged below the liquid level of alcohol solution 7, and alcohol solution 7 is configured as ethanol purity standard substance and distilled water; The detector 4 is connected, the air inlet end of th...
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The invention relates to a calibrating device for an exhaled gas alcohol content detector. The calibrating device comprises a gas source, a gas generation system and the exhaled gas alcohol content detector, wherein the gas generation system comprises a sealed vessel, a heating device and an alcohol solution, the alcohol solution is arranged in the sealed vessel, a gas outlet end of a gas inlet pipe is arranged below the surface of the alcohol solution, the gas generation system is connected with the exhaled gas alcohol content detector through a gas outlet pipe, a gas inlet end of the gas outlet pipe is arranged above the surface of the alcohol solution, and the heating device is arranged in the sealed vessel. The alcohol solution is prepared by utilizing an ethanol purity standard substance of a given amount and distilled water, and the alcohol solution in the sealed vessel is heated to 34 DEG C. The generated alcohol gas and the alcohol solution can reach gas-liquid balance due to the two-phase balance of the alcohol aqueous solution and the alcohol gas, clean air is continuously blown into the alcohol solution, and the alcohol gas is introduced to the exhaled gas alcohol content detector, so that the exhaled gas alcohol content detector can be verified and calibrated.
Description
[0001] Technical field: [0002] The invention belongs to the technical field of detection and acceptance of an exhaled gas alcohol content detector, and in particular relates to a verification device for verifying an exhaled gas alcohol content detector. Background technique: [0003] The breath alcohol content detector is used to detect the alcohol content in the breath of the human body. The detector is composed of gas circuit, electronic circuit, sensor, display and other components. Its working principle is that ethanol gas passes through the sensor and is converted into a current or voltage signal, and then through the analog-to-digital conversion of the circuit, the alcohol concentration value in the gas is displayed on the instrument. . [0004] In order to ensure the accuracy and uniformity of the measured value of the exhaled alcohol content detector during use, the State Bureau of Technical Supervision promulgated JJG657-2006 "Verification Regulations for Exha...
Claims
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IPC IPC(8): G01N33/98
CPCG01N33/98
Inventor 孔小平朱茜李博孙晓萍李莺许建军孟洁
Owner HENAN PROVINCE INST OF METROLOGY