阅读说明：本技术 快排式酒检仪动态校准方法及检测仪 (Dynamic calibration method and detector for quick-discharging type wine detector ) 是由 任红军 高锋 郑建利 殷灿 毕小乐 刘金峰 贺德江 王月强 于 2020-12-28 设计创作，主要内容包括：本发明提供了一种快排式酒检仪动态校准方法及检测仪,所述方法包括以下步骤：构建距离-流量模型,读取吹气人口鼻与快排查呼出气体酒精含量检测仪的吹气口之间的实时距离参数,读取所述快排查呼出气体酒精含量检测仪的输气通道内的实时流量参数；基于所述距离-流量模型、所述实时距离参数和所述实时流量参数,获取动态校准因子Q；读取混合空气的初始酒精浓度检测值Y0,根据所述动态校准因子Q对所述初始酒精浓度检测值Y0进行校准,获得校准后的酒精浓度检测值Y。本发明通过动态校准因子Q对初始酒精浓度检测值进行修正输出校准后的酒精浓度检测值,从而解决因混合空气影响导致的结果偏差的技术问题。(The invention provides a dynamic calibration method and a detector for a quick-discharging type wine detector, wherein the method comprises the following steps: constructing a distance-flow model, reading real-time distance parameters between an oral nose of a person blowing the air and an air blowing opening of a fast-investigation exhaled air alcohol content detector, and reading real-time flow parameters in an air transmission channel of the fast-investigation exhaled air alcohol content detector; acquiring a dynamic calibration factor Q based on the distance-flow model, the real-time distance parameter and the real-time flow parameter; and reading an initial alcohol concentration detection value Y0 of the mixed air, and calibrating the initial alcohol concentration detection value Y0 according to the dynamic calibration factor Q to obtain a calibrated alcohol concentration detection value Y. According to the invention, the initial alcohol concentration detection value is corrected by the dynamic calibration factor Q, and the corrected alcohol concentration detection value is output, so that the technical problem of result deviation caused by the influence of mixed air is solved.)

1. A dynamic calibration method for a quick-discharging type wine inspection instrument is characterized by comprising the following steps:

constructing a distance-flow model, reading real-time distance parameters between an oral nose of a person blowing the air and an air blowing opening of a fast-investigation exhaled air alcohol content detector, and reading real-time flow parameters in an air transmission channel of the fast-investigation exhaled air alcohol content detector;

acquiring a dynamic calibration factor Q based on the distance-flow model, the real-time distance parameter and the real-time flow parameter;

and reading an initial alcohol concentration detection value Y0 of the mixed air, and calibrating the initial alcohol concentration detection value Y0 according to the dynamic calibration factor Q to obtain a calibrated alcohol concentration detection value Y.

2. The dynamic calibration method for the fast-discharging type alcohol analyzer according to claim 1, wherein the calibrated alcohol concentration detection value Y and the initial alcohol concentration detection value Y0 satisfy a functional relationship: the calibrated alcohol concentration detection value Y = dynamic calibration factor Q × initial alcohol concentration detection value Y0.

3. The dynamic calibration method for the fast-discharging type wine inspection instrument according to claim 1, wherein when the distance-flow model is constructed, the following steps are executed:

taking the distance a as a first further distance, and acquiring a series of calibration distance parameters;

taking the flow b as a second step distance to obtain a series of calibration flow parameters;

when the calibration distance parameters are the same and the calibration flow parameters are different, simulating and outputting alcohol gas with standard alcohol concentration to a gas blowing port of the fast-investigation exhaled gas alcohol content detector to obtain actually measured alcohol concentration in a series of gas transmission channels;

when the calibration flow parameters are the same and the calibration distance parameters are different, simulating and outputting alcohol gas with standard alcohol concentration to a gas blowing port of the fast-investigation exhaled gas alcohol content detector to obtain actually measured alcohol concentration in a series of gas transmission channels;

and associating the calibration distance parameter, the calibration flow parameter, the standard alcohol concentration and the measured alcohol concentration to construct a distance-flow model.

4. The dynamic calibration method for the fast-discharging type wine inspection instrument according to claim 3, wherein when the dynamic calibration factor Q is obtained, the following steps are performed:

comparing the real-time distance parameter with a series of calibration flow parameters, if the real-time distance parameter is consistent with a certain calibration flow parameter, comparing the real-time flow parameter with a series of calibration flow parameters, and if the real-time flow parameter is consistent with a certain calibration flow parameter, extracting standard alcohol concentration and actual measurement alcohol concentration which are associated with the real-time distance parameter and the real-time flow parameter;

and obtaining a corresponding dynamic calibration factor Q according to the standard alcohol concentration/the actually measured alcohol concentration.

5. The dynamic calibration method for the fast-discharging type wine inspection instrument according to claim 4, further comprising the following steps of, when obtaining the dynamic calibration factor Q:

when the real-time distance parameter is inconsistent with each calibration flow parameter, extracting the calibration flow parameter with the minimum difference value with the real-time distance parameter as a target calibration flow parameter;

if the real-time flow parameters are inconsistent with the calibration flow parameters, extracting the calibration flow parameters with the minimum difference value with the real-time flow parameters as target calibration flow parameters;

obtaining a standard alcohol concentration and a measured alcohol concentration associated with the target calibration flow parameter and the target calibration flow parameter.

6. The dynamic calibration method for the fast-discharging type wine detection instrument according to any one of claims 2 to 5, wherein before the initial alcohol concentration detection value Y0 is calibrated, the following steps are further performed: determining whether the real-time distance parameter is greater than a first distance threshold and the real-time traffic parameter is less than a first traffic threshold,

when the real-time distance parameter is greater than the first distance threshold and the real-time traffic parameter is less than the first traffic threshold, according to Q = Q'/C₁+1 updating the dynamic calibration factor Q;

when the real-time distance parameter is greater than the second distance threshold and the real-time traffic parameter is less than the second traffic threshold, according to Q = Q'/C₂+1 updating the dynamic calibration factor Q;

wherein, C₁Is a first predetermined constant, C₂Is a second predetermined constant, a first predetermined constant C₁Less than a second predetermined constant C₂(ii) a The first distance threshold is greater than the second distance threshold, and the first flow threshold is less than the second flow threshold.

7. The dynamic calibration method for the fast-discharging type alcohol analyzer according to claim 6, wherein before the initial alcohol concentration detection value Y0 is calibrated, the following steps are further performed:

judging whether the real-time distance parameter is greater than a third distance threshold value and whether the real-time flow parameter is smaller than a third flow threshold value, and generating a warning signal when the real-time distance parameter is greater than the third distance threshold value or the real-time flow parameter is smaller than the third flow threshold value;

the maximum reaction distance of the fast-investigation exhaled gas alcohol content detector is greater than or equal to the third distance threshold and greater than the second distance threshold, and the minimum reaction flow of the fast-investigation exhaled gas alcohol content detector is less than or equal to the third flow threshold and less than the second flow threshold.

8. The utility model provides a fast investigation expired gas alcohol content detector which characterized in that: comprises an alcohol concentration detection circuit, a distance detection circuit, a flow detection circuit and a calibration controller, wherein,

the alcohol concentration detection circuit is connected with the calibration controller and used for collecting an initial alcohol concentration detection value of the mixed air and transmitting the initial alcohol concentration detection value to the calibration controller;

the distance detection circuit is connected with the calibration controller and is used for detecting real-time distance parameters between the mouth and the nose of a person who blows air and an air blowing opening of the instrument for quickly checking the alcohol content of the exhaled air and transmitting the real-time distance parameters to the calibration controller;

the flow detection circuit is connected with the calibration controller and is used for detecting real-time flow parameters in the gas transmission channel and transmitting the real-time flow parameters to the calibration controller;

a fast-check exhaled gas alcohol content detection calibration program stored and executable on the calibration controller, the fast-check exhaled gas alcohol content detection calibration program when executed by the calibration controller implementing the steps of the method for dynamic calibration of a fast-check alcohol testing instrument according to any one of claims 1 to 7.

9. The fast check exhaled breath alcohol content detector of claim 8, wherein the alcohol concentration detection circuit comprises a first signal processing circuit and an alcohol sensor, an output signal of the alcohol sensor being transmitted to the calibration controller via the first signal processing circuit;

first signal processing circuit includes first fortune and puts chip U3B, the positive input of first fortune is put chip U3B and is passed through wave filter U4 and is connected the alcohol sensor, the negative input of first fortune is put chip U3B and is passed through resistance R6 and connect the alcohol sensor, the output of first fortune is put chip U3B and is passed through second resistance R7 and connect the negative input of first fortune is put chip U3B, the output of first fortune is put chip U3B and still is connected through third resistance R8 the calibration controller, third resistance R8 still passes through electric capacity C5 ground connection.

10. The rapid check exhaled breath alcohol content detector according to claim 8, wherein said flow detection circuit comprises a second signal processing circuit and a pressure sensor, an output signal of said pressure sensor being transmitted to said calibration controller via said second signal processing circuit;

the second signal processing circuit comprises a second operational amplifier chip, the second operational amplifier chip comprises an operational amplifier chip U5A, an operational amplifier chip U5B and an operational amplifier chip U5C, the positive input end of the operational amplifier chip U5A is connected with the pressure sensor, the negative input end of the operational amplifier chip U5A is connected with the negative input end of the operational amplifier chip U5B through a resistor R18, and the positive input end of the operational amplifier chip U5B is connected with the pressure sensor; the output end of the operational amplifier chip U5A is connected with the negative input end of the operational amplifier chip U5A through a resistor R11, and the output end of the operational amplifier chip U5B is connected with the negative input end of the operational amplifier chip U5B through a resistor R12;

the output of chip U5A is put to fortune still connects through resistance R13 chip U5C's negative input end is put to fortune, chip U5B's output is put to fortune still connects through resistance R14 chip U5C's positive input end is put to fortune, chip U5C's output is put to fortune passes through resistance R15 and connects chip U5C's negative input end is put to fortune, chip U5C's output is put to fortune still connects through resistance R17 calibration controller.

Technical Field

The invention relates to the technical field of alcohol detection, in particular to a dynamic calibration method and a detector for a quick-discharging type wine detector.

Background

The existing police alcohol detectors are mainly divided into two categories, namely fast alcohol detector for fast examination and alcohol detector for evidence collection. The alcohol detector for evidence obtaining is provided with the disposable blowpipe, exhaled air and air are isolated during blowing, air mixing is avoided, the detection result is accurate, the defect that the disposable blowpipe needs to be replaced every time when the alcohol detector is tested is overcome, operation is inconvenient, and use cost is high.

Alcohol detector of investigation fast is mostly the stick formula, does not need the blowpipe, only need stretch the instrument to the local sampling expired gas of several centimetres apart from people's mouth nose department and carry out the result and calculate, more convenient health. Because of not having the blowpipe, inevitably like this can mix some air and get into the machine, lead to the result on the low side to the instrument is different apart from the distance of people's mouth nose department, and the air flow is different, and the air proportion of mixing is also different, leads to the result can be along with the instrument apart from the distance change of people's mouth nose department, seriously influences the accuracy of alcohol result.

In order to solve the above problems, people are always seeking an ideal technical solution.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a dynamic calibration method and a detector for a quick-discharging type wine detector.

In order to achieve the purpose, the invention adopts the technical scheme that:

the invention provides a dynamic calibration method for a quick-discharging type wine inspection instrument in a first aspect, which comprises the following steps:

constructing a distance-flow model, reading real-time distance parameters between an oral nose of a person blowing the air and an air blowing opening of a fast-investigation exhaled air alcohol content detector, and reading real-time flow parameters in an air transmission channel of the fast-investigation exhaled air alcohol content detector;

acquiring a dynamic calibration factor Q based on the distance-flow model, the real-time distance parameter and the real-time flow parameter;

reading an initial alcohol concentration detection value Y0 of the mixed air, and calibrating the initial alcohol concentration detection value Y0 according to the dynamic calibration factor Q to obtain a calibrated alcohol concentration detection value Y;

wherein the calibrated alcohol concentration detection value Y and the initial alcohol concentration detection value Y0 satisfy a functional relationship Y = Q x Y0.

The invention provides a detector for quickly investigating the alcohol content of exhaled gas, which comprises an alcohol concentration detection circuit, a distance detection circuit, a flow detection circuit and a calibration controller, wherein,

the alcohol concentration detection circuit is connected with the calibration controller and used for collecting an initial alcohol concentration detection value of the mixed air and transmitting the initial alcohol concentration detection value to the calibration controller;

the distance detection circuit is connected with the calibration controller and is used for detecting real-time distance parameters between the mouth and the nose of a person who blows air and an air blowing opening of the instrument for quickly checking the alcohol content of the exhaled air and transmitting the real-time distance parameters to the calibration controller;

the flow detection circuit is connected with the calibration controller and is used for detecting real-time flow parameters in the gas transmission channel and transmitting the real-time flow parameters to the calibration controller;

and the quick-check expired gas alcohol content detection calibration program is stored on the calibration controller and can run on the calibration controller, and when being executed by the calibration controller, the quick-check expired gas alcohol content detection calibration program realizes the steps of the dynamic calibration method of the quick-check alcohol tester.

Compared with the prior art, the method and the detector for dynamically calibrating the quick-discharging type wine detector have outstanding substantive characteristics and remarkable progress, the dynamic calibration factor Q is obtained by the real-time distance parameter and the real-time flow parameter, the initial alcohol concentration detection value is corrected by the dynamic calibration factor Q, and the corrected alcohol concentration detection value is output, so that the technical problem of result deviation caused by the influence of mixed air is solved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a circuit schematic of the calibration controller of the present invention;

FIG. 3 is a circuit schematic of the distance detection circuit of the present invention;

FIG. 4 is a schematic circuit diagram of the alcohol concentration detection circuit of the present invention;

FIG. 5 is a circuit schematic of the flow sensing circuit of the present invention;

FIG. 6 is a circuit schematic of the buzzer circuit of the present invention;

FIG. 7 is a circuit schematic of the LED circuit of the present invention;

fig. 8 is a circuit schematic of the key circuit of the present invention.

Detailed Description

The technical solution of the present invention is further described in detail by the following embodiments.

Example 1

A dynamic calibration method for a quick-discharging type wine inspection instrument comprises the following steps: constructing a distance-flow model, reading real-time distance parameters between an oral nose of a person blowing the air and an air blowing opening of a fast-investigation exhaled air alcohol content detector, and reading real-time flow parameters in an air transmission channel of the fast-investigation exhaled air alcohol content detector;

acquiring a dynamic calibration factor Q based on the distance-flow model, the real-time distance parameter and the real-time flow parameter;

reading an initial alcohol concentration detection value Y0 of the mixed air, and calibrating the initial alcohol concentration detection value Y0 according to the dynamic calibration factor Q to obtain a calibrated alcohol concentration detection value Y; wherein the calibrated alcohol concentration detection value Y and the initial alcohol concentration detection value Y0 satisfy a functional relationship: the calibrated alcohol concentration detection value Y = dynamic calibration factor Q × initial alcohol concentration detection value Y0.

It should be noted that the exhaled gas alcohol content output by the fast-investigation exhaled gas alcohol content detector is related to the real-time distance parameter and the real-time flow parameter, and the larger the real-time distance parameter is, the smaller the real-time flow parameter is, the larger the deviation between the exhaled gas alcohol content output by the fast-investigation exhaled gas alcohol content detector and the actual alcohol concentration in the exhaled gas is. Therefore, the initial alcohol concentration detection value Y0 is corrected through the real-time distance parameter and the real-time flow parameter, and the corrected alcohol concentration detection value Y is used as a detection result, so that the accuracy of the detection result of the exhaled gas alcohol content detector for quick check is improved.

Further, when constructing the distance-flow model, the following steps are executed: taking the distance a as a first further distance, and acquiring a series of calibration distance parameters; taking the flow b as a second step distance to obtain a series of calibration flow parameters; when the calibration distance parameters are the same and the calibration flow parameters are different, simulating and outputting alcohol gas with standard alcohol concentration to a gas blowing port of the fast-investigation exhaled gas alcohol content detector to obtain actually measured alcohol concentration in a series of gas transmission channels; when the calibration flow parameters are the same and the calibration distance parameters are different, simulating and outputting alcohol gas with standard alcohol concentration to a gas blowing port of the fast-investigation exhaled gas alcohol content detector to obtain the actually measured alcohol concentration in a series of gas transmission channels, so as to record the variation trend of the actually measured alcohol concentration along with the calibration distance parameters and the calibration flow parameters;

and associating the calibration distance parameter, the calibration flow parameter, the standard alcohol concentration and the measured alcohol concentration to construct a distance-flow model.

The distance a can be 1cm, 0.5cm or 0.1cm, the flow b can be 1L/min, 0.5L/min or 0.1L/min, and the specific application can be adaptively modified according to the needs.

It should be noted that a plurality of detection values of each measured alcohol concentration in the gas transmission channel are obtained through a plurality of measurements (for example, 10 times), an abnormal constant is eliminated, and an average value is obtained to serve as a final measured alcohol concentration, so that the influence of random errors on the dynamic calibration factor Q is reduced, and the accuracy of the dynamic calibration of the quick-discharging type alcohol analyzer is further improved.

The following table gives a specific embodiment of a distance-flow model:

in the above table, W_i(i =1, 2, 3 …) represents a distance parameter between the air outlet of the simulator and the air inlet of the detector, the step distance being 1 cm; s_j(j =1, 2, 3 …) represents a flow parameter in the gas transmission channel, the step flow being 1L/min; a represents a standard alcohol concentration, the value of which is known; b is_ijThe distance parameter between the air outlet of the simulator and the air inlet of the detector is represented as W_iAnd the flow parameter in the gas transmission channel is S_jThen, the actually measured alcohol concentration in the gas transmission channel is the alcohol detection result of the expired gas doped with air;

the calculation formula of the dynamic calibration factor is Q_ij= A/B_ij，Q_ijThe real-time distance parameter between the mouth and the nose of the person who blows the air and the air blowing mouth of the detector for quickly checking the alcohol content of the exhaled air is W_iAnd the flow parameter in the gas transmission channel of the detector for quickly investigating the alcohol content of the exhaled gas is S_jThe corresponding calibration factor.

Further, when the dynamic calibration factor Q is obtained, the following steps are performed: comparing the real-time distance parameter with a series of calibration flow parameters, if the real-time distance parameter is consistent with a certain calibration flow parameter, comparing the real-time flow parameter with a series of calibration flow parameters, and if the real-time flow parameter is consistent with a certain calibration flow parameter, extracting standard alcohol concentration and actual measurement alcohol concentration which are associated with the real-time distance parameter and the real-time flow parameter; and obtaining a corresponding dynamic calibration factor Q according to the standard alcohol concentration/the actually measured alcohol concentration.

Example 2

This example differs from example 1 in that: when the dynamic calibration factor Q is acquired, further performing: when the real-time distance parameter is inconsistent with each calibration flow parameter, extracting the calibration flow parameter with the minimum difference value with the real-time distance parameter as a target calibration flow parameter;

if the real-time flow parameters are inconsistent with the calibration flow parameters, extracting the calibration flow parameters with the minimum difference value with the real-time flow parameters as target calibration flow parameters;

and acquiring a standard alcohol concentration and an actually measured alcohol concentration which are associated with the target calibration flow parameter and the target calibration flow parameter, and acquiring a corresponding dynamic calibration factor Q according to the standard alcohol concentration/the actually measured alcohol concentration.

It should be noted that, in consideration of the fact that in practical application, the real-time distance parameter may not be consistent with each calibration flow parameter or the real-time flow parameter may not be consistent with each calibration flow parameter, and at this time, the dynamic calibration factor Q cannot be directly obtained according to the real-time distance parameter and the real-time flow parameter, the target calibration flow parameter and the target calibration flow parameter need to be obtained first, and then the dynamic calibration factor Q is obtained through the target calibration flow parameter and the target calibration flow parameter, so as to improve the flexibility of the dynamic calibration method of the quick-discharge type alcohol detector.

Example 3

The present embodiment differs from the above embodiments in that: before the calibration of the initial alcohol concentration detection value Y0, further performing: determining whether the real-time distance parameter is greater than a first distance threshold and the real-time traffic parameter is less than a first traffic threshold,

when the real-time distance parameter is greater than the first distance threshold and the real-time traffic parameter is less than the first traffic threshold, according to Q = Q'/C₁+1 updating the dynamic calibration factor Q;

when the real-time distance parameter is greater than the second distance threshold and the real-time traffic parameter is less than the second traffic threshold, according to Q = Q'/C₂+1 updating the dynamic calibration factor Q;

wherein, C₁Is a first predetermined constant, C₂Is the second preset constantNumber, the first preset constant C₁Less than the second predetermined constant C₂(ii) a The first distance threshold is greater than the second distance threshold, the first flow threshold is less than the second flow threshold; q' is obtained from the standard alcohol concentration/the measured alcohol concentration, and is an un-updated dynamic calibration factor.

It can be understood that, generally, the instrument for rapidly checking the alcohol content of the exhaled air is not provided with a disposable blow pipe basically, the distance between the air inlet of the instrument and the mouth and nose of a person is different, the blowing flow rate is different, the mixed air proportion is different, so that the detection result can change along with the distance between the instrument and the mouth and nose of the person, generally speaking, the farther the air inlet of the instrument is from the mouth and nose of the person, the smaller the blowing flow rate is, the more air is mixed, and the larger the initial alcohol concentration detection value Y0 and the actual alcohol concentration in the exhaled air are.

It should be noted that the exhaled gas alcohol molecules do irregular movement, i.e. diffusion movement, between the nose of the insufflation port and the insufflation port of the detector for quickly investigating the content of exhaled gas alcohol. The diffusion of the exhaled gas alcohol molecules is non-uniform, as the real-time distance parameter approaches the maximum reaction distance of the fast-check exhaled gas alcohol content detector, the real-time flow parameter approaches the minimum reaction flow of the fast-check exhaled gas alcohol content detector, and the difference between the initial alcohol concentration detection value Y0 of the fast-check exhaled gas alcohol content detector and the actual alcohol concentration in the exhaled gas is larger and larger, namely the accuracy of the fast-check exhaled gas alcohol content detector is greatly reduced; therefore, the dynamic calibration factor Q needs to be corrected by adopting a piecewise linear function, so as to improve the accuracy of the dynamic calibration factor Q, and further improve the accuracy of the dynamic calibration method of the quick-discharging type wine inspection instrument.

In the embodiment, two linear functions with different preset constants are adopted to update the dynamic calibration factor Q. Of course, in other embodiments of the present invention, a plurality of distance critical points and a plurality of flow critical points may also be selected, and three or more than three linear functions are used to represent the correction dynamic calibration factor Q, so as to further improve the detection accuracy. Therefore, the number of distance critical points and flow critical points can be set according to the reaction time and detection accuracy requirements.

Example 4

The present embodiment differs from the above embodiments in that: before the calibration of the initial alcohol concentration detection value Y0, further performing: judging whether the real-time distance parameter is greater than a third distance threshold value and whether the real-time flow parameter is smaller than a third flow threshold value, and generating a warning signal when the real-time distance parameter is greater than the third distance threshold value or the real-time flow parameter is smaller than the third flow threshold value;

the maximum reaction distance of the fast-investigation exhaled gas alcohol content detector is greater than or equal to the third distance threshold and greater than the second distance threshold, and the minimum reaction flow of the fast-investigation exhaled gas alcohol content detector is less than or equal to the third flow threshold and less than the second flow threshold.

It should be noted that the third distance threshold is slightly smaller than the maximum reaction distance of the fast-investigation exhaled gas alcohol content detector, the third flow threshold is slightly larger than the minimum reaction flow of the fast-investigation exhaled gas alcohol content detector, when the real-time distance parameter reaches the maximum reaction distance of the fast-investigation exhaled gas alcohol content detector, the real-time flow parameter reaches the minimum reaction flow of the fast-investigation exhaled gas alcohol content detector, the accuracy of the initial alcohol concentration detection value Y0 will be greatly reduced, even may be 0, at this time, the dynamic calibration factor Q is used to calibrate the initial alcohol concentration detection value Y0, and it is difficult to obtain an accurate alcohol concentration detection value Y.

Therefore, when the real-time distance parameter is greater than the third distance threshold or the real-time flow parameter is less than the third flow threshold, a warning signal needs to be generated to remind a user to adjust the distance between the mouth and the nose of the person who blows the air and the blowing opening of the fast-investigation exhaled air alcohol content detector in time, and the influence on the detection effect due to the fact that the maximum reaction distance of the fast-investigation exhaled air alcohol content detector is exceeded is avoided.

Example 5

This example provides a specific implementation of a fast-check expired gas alcohol content detector.

As shown in fig. 1, the instrument for quickly investigating the alcohol content of the exhaled gas comprises an alcohol concentration detection circuit, a distance detection circuit, a flow detection circuit and a calibration controller, wherein the alcohol concentration detection circuit is connected with the calibration controller and is used for acquiring an initial alcohol concentration detection value of mixed air and transmitting the initial alcohol concentration detection value to the calibration controller; the distance detection circuit is connected with the calibration controller and is used for detecting real-time distance parameters between the mouth and the nose of a person who blows air and an air blowing opening of the instrument for quickly checking the alcohol content of the exhaled air and transmitting the real-time distance parameters to the calibration controller;

the flow detection circuit is connected with the calibration controller and is used for detecting real-time flow parameters in the gas transmission channel and transmitting the real-time flow parameters to the calibration controller;

and the quick-check expired gas alcohol content detection calibration program is stored on the calibration controller and can run on the calibration controller, and when being executed by the calibration controller, the quick-check expired gas alcohol content detection calibration program realizes the steps of the dynamic calibration method of the quick-check alcohol tester.

It can be understood that usually, the detector for rapidly checking the alcohol content of the exhaled air is not provided with a disposable blow pipe basically, but is used for sampling the exhaled air at a place which is a few centimeters away from the mouth and nose of a person, so that part of mixed air inevitably enters the detector, the detection result is low, the distance from an air inlet of the detector to the mouth and nose of the person is different, the blowing flow is different, the proportion of the mixed air is different, and the detection result is changed along with the distance from the detector to the mouth and nose of the person; generally, the farther the air inlet of the detector is away from the mouth and nose of a person, the smaller the blowing flow rate, the more air is mixed in, and the lower the result is. Two parameters for this influence the result: the invention provides a detector for quickly investigating the alcohol content of exhaled gas, which is additionally provided with a result correction system; this fast investigation expired gas alcohol content detector installs the result correction system that distance detection circuit and flow detection circuit ware are constituteed additional, the distance detection circuit measures the distance of the air inlet of detector apart from people's mouth and nose department, flow detection circuit ware measures the gas flow of blowing, simulate the people through the simulator in advance and blow off the alcohol gas of standard alcohol concentration (known concentration), be in different distances at the air inlet that makes the gas outlet of simulator and detector, adjust the alcohol gas of the different flow of gas outlet output of simulator through the flow controller, measure the actual measurement alcohol concentration of alcohol concentration detection circuit output this moment, through standard alcohol concentration the actual measurement alcohol concentration calculates a dynamic calibration factor Q.

It should be noted that, when the distance-flow model is constructed, the flow controller is used to adjust the output gas flow of the simulator, and the flow parameter in the gas transmission channel is detected, so that the flow parameter in the gas transmission channel is consistent with the calibration flow parameter.

In actual testing, a factor Q needing dynamic calibration is found according to the real-time distance parameter and the real-time flow parameter, and an initial alcohol concentration detection value doped with air is corrected, so that the technical problem of result deviation caused by mixed air influence is solved.

This embodiment provides a specific implementation manner of an alcohol concentration detection circuit, where the alcohol concentration detection circuit includes a first signal processing circuit and an alcohol sensor, and an output signal of the alcohol sensor is transmitted to the calibration controller through the first signal processing circuit. As shown in fig. 4, the first signal processing circuit includes a first operational amplifier chip U3B, a positive input terminal of the first operational amplifier chip U3B is connected to the alcohol sensor S1 through a filter U4, a negative input terminal of the first operational amplifier chip U3B is connected to the alcohol sensor S1 through a resistor R6, an output terminal of the first operational amplifier chip U3B is connected to a negative input terminal of the first operational amplifier chip U3B through a second resistor R7, an output terminal of the first operational amplifier chip U3B is further connected to the calibration controller through a third resistor R8, and the third resistor R8 is further grounded through a capacitor C5.

This embodiment further provides a specific implementation manner of the flow rate detection circuit, where the flow rate detection circuit includes a second signal processing circuit and a pressure sensor, and an output signal of the pressure sensor is transmitted to the calibration controller through the second signal processing circuit. As shown in fig. 5, the second signal processing circuit includes a second operational amplifier chip (for example, an operational amplifier chip with model MCP6L 04), the second operational amplifier chip includes an operational amplifier chip U5A, an operational amplifier chip U5B and an operational amplifier chip U5C, a positive input terminal of the operational amplifier chip U5A is connected to the pressure sensor S2, a negative input terminal of the operational amplifier chip U5A is connected to a negative input terminal of the operational amplifier chip U5B through a resistor R18, and a positive input terminal of the operational amplifier chip U5B is connected to the pressure sensor S2; the output end of the operational amplifier chip U5A is connected with the negative input end of the operational amplifier chip U5A through a resistor R11, and the output end of the operational amplifier chip U5B is connected with the negative input end of the operational amplifier chip U5B through a resistor R12; the output of chip U5A is put to fortune still connects through resistance R13 chip U5C's negative input end is put to fortune, chip U5B's output is put to fortune still connects through resistance R14 chip U5C's positive input end is put to fortune, chip U5C's output is put to fortune passes through resistance R15 and connects chip U5C's negative input end is put to fortune, chip U5C's output is put to fortune still connects through resistance R17 calibration controller.

This embodiment further provides a specific implementation of a distance detection circuit, where the distance detection circuit includes a third signal processing circuit and a distance sensor, and an output signal of the distance sensor is transmitted to the calibration controller through the third signal processing circuit, as shown in fig. 3.

Specifically, the types of the alcohol sensor, the distance sensor, and the pressure sensor are not limited, and may be electrochemical, semiconductor, optical, ultrasonic, or other types of sensors; the circuit schematic of the calibration controller is shown in fig. 2.

Furthermore, the calibration controller is also connected with an acousto-optic alarm circuit, and the acousto-optic alarm circuit is used for sending alarm information. Specifically, the sound and light alarm circuit comprises a buzzer circuit and an LED circuit, as shown in FIGS. 6 and 7.

Further, the calibration controller is also connected with a display device, and the display device is used for displaying the calibrated alcohol concentration detection value. Specifically, the display device may be a liquid crystal display, a digital tube display or a touch display.

Further, the calibration controller is also connected with an operation keyboard, and the operation keyboard is used for parameter input and interaction with an operator to realize testing and other different function selections, as shown in fig. 8.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.