Wine measurement anti-cheating detection method based on gas component analysis and wine measurement detection equipment

Abstract

The invention relates to a gas component analysis-based wine detection anti-cheating detection method and wine detection equipment, and belongs to the field of drinking detection. According to the scheme of the invention, after the identity of the detected person is registered, the exhaled gas component of the blowing wine test is detected and is compared with the exhaled gas component pre-collected from the person corresponding to the registered identity, and whether the detected person subjected to the blowing wine test is consistent with the registered identity or not is judged by judging whether the comparison results are similar or not; the cheating problem that blowing detection is replaced by others after identity registration in existing drinking detection can be effectively prevented, supervision by operators on duty is not needed, and manpower is saved.

Description

Technical Field

[0001] The invention relates to a gas composition analysis-based alcohol testing and anti-cheating detection method and alcohol testing equipment, belonging to the technical field of train driver safety duty monitoring. Background Art

[0002] In the field of railway transportation, the working status of locomotive crew members directly affects the safety of railway transportation. Among them, the problem of drunk driving is a major hidden danger that causes major safety accidents. Once a safety accident occurs, the consequences are quite serious. Therefore, it is necessary to use a drinking detection system to test the crew members for alcohol before taking up their posts. The crew members are required to blow into the detection system, and the detection system detects alcohol in their exhaled gas. However, in actual applications, there will be situations where crew members will let others blow on their behalf to evade detection after drinking, and ordinary drinking detection equipment does not have the function of anti-cheating. Therefore, it is necessary to arrange on-duty personnel to supervise, which increases labor costs and wastes manpower and material resources.

[0003] The Chinese patent document with publication number CN108197553A discloses a method and system for detecting alcohol consumption for locomotive crew members to prevent cheating based on iris tracking, including an alcohol testing module, an iris recognition module, a camera, a fingerprint device, a system main board and a touch display screen. The touch display screen is connected to the system main board to realize human-computer interaction and operation; the iris recognition module is connected to the system main board to provide iris-based identity recognition and realize iris tracking; the fingerprint device module is connected to the system main board for fingerprint registration. The present invention aims at the occurrence of artificial substitution of blowing during the alcohol testing of crew members. While blowing for alcohol testing, the identified iris is tracked. When the person leaves or the iris is replaced by someone else's, the test is terminated, and the identity must be re-registered for identification and confirmation before the alcohol test can be performed. The system largely avoids the situation where crew members cheat by asking others to blow for them during alcohol testing.

[0004] However, the above solution still cannot eliminate the problem of cheating, such as Figure 2 As shown, the person being tested stands in front of the testing equipment and prepares for identity recognition and breath testing. The testing equipment confirms the identity of the current person being tested through iris or face recognition. At the same time, the person being tested takes a thin hose and connects one end of the hose to the air blowing head of the alcohol detector of the testing equipment. At this time, the iris or face detection equipment can still identify the person being tested, and someone else blows on the other end of the hose to complete the drinking test. To address this cheating problem, currently, it is still only possible to arrange on-site staff to supervise, but this will increase labor costs and waste manpower and material resources. Summary of the invention

[0005] The purpose of the present invention is to provide a method and equipment for detecting alcohol and preventing cheating based on gas composition analysis, so as to solve the problem that cheating cannot be eliminated in current alcohol detection.

[0006] To achieve the above object, the solution of the present invention includes: The technical solution of the gas composition analysis-based alcohol testing anti-cheating detection method of the present invention is as follows: after completing the identity registration, the person being tested blows a breath to test the alcohol, and the exhaled gas of the person being tested during the breath testing is analyzed to obtain content characteristic values ​​of different gas components, and the content characteristic values ​​of different gas components of the exhaled gas of the person whose identity is registered are compared with the pre-obtained corresponding content characteristic values ​​of different gas components of the exhaled gas of the person, and whether the two exhaled gases are similar in gas composition is determined according to the comparison result; if not similar, it is considered that the person being tested is not a person who matches the identity registered.

[0007] Furthermore, the characteristic values ​​of the gas components of the exhaled gas are obtained in the following manner: A certain amount of gas to be analyzed is collected from the exhaled gas, and the gas to be analyzed is passed through a number of set different gas sensors to obtain characteristic values ​​of corresponding gas components.

[0008] Furthermore, the method for obtaining the gas component characteristic values ​​of the exhaled gas obtained in advance is as follows: obtaining the characteristic values ​​of the gas components of the exhaled gas of the corresponding person including the characteristic values ​​of the gas components of the exhaled gas collected when the person is in a normal physical state, and also obtaining the characteristic values ​​of the gas components of the exhaled gas of the corresponding person including the condition of getting angry and / or catching a cold; averaging the characteristic values ​​of the same gas component in different conditions as the characteristic values ​​of the corresponding gas components of the exhaled gas obtained in advance.

[0009] Furthermore, whether the two exhaled gases are similar in gas composition is determined in the following manner: a similarity value corresponding to the gas component is obtained according to a difference in characteristic values ​​of the same gas component of the two exhaled gases, and a weighted sum is obtained by taking the similarity values ​​of the various gas components; if the weighted sum is greater than a preset weight threshold, the two exhaled gases are considered to be similar in gas composition.

[0010] Furthermore, the pre-acquired characteristic values ​​of the gas components of the exhaled gas include the characteristic values ​​of the various gas components of the exhaled gas of the corresponding person when the person is in normal physical condition, and also include the characteristic values ​​of the gas components of the exhaled gas when the person has a fever and / or a cold; when comparing, the pre-acquired characteristic values ​​of the various gas components of the exhaled gas under the same circumstances are used for comparison based on the current situation selected by the person being tested.

[0011] The beneficial effects of the present invention are: The gas composition analysis-based alcohol testing anti-cheating detection method of the present invention detects the exhaled gas composition of the breath test after the person being tested has registered his / her identity, and compares it with the exhaled gas composition collected in advance from the person corresponding to the registered identity. By comparing whether the comparison results are similar, it is judged whether the person being tested who is performing the breath test is consistent with the registered identity. This method can effectively prevent the cheating problem of existing alcohol testing in which other people take the place of others in the breath test after the identity is registered, and no supervision by on-duty personnel is required, thus saving manpower.

[0012] A detection scheme of a wine testing device based on gas composition analysis of the present invention completes alcohol detection through the following steps: after the person being tested registers his identity, the exhaled gas of the person being tested is received, the exhaled gas of the person being tested is analyzed to obtain characteristic values ​​of different gas components, and the characteristic values ​​of different gas components of the exhaled gas of the person being tested are compared with the characteristic values ​​of different gas components of the exhaled gas of the person with the registered identity obtained in advance to determine whether the two exhaled gases are similar in gas composition; if similar, it is considered that the person being tested matches the registered identity.

[0013] Furthermore, the characteristic values ​​of the gas components of the exhaled gas are obtained in the following manner: A certain amount of gas to be analyzed is collected from the exhaled gas, and the gas to be analyzed is passed through a number of set different gas sensors to obtain characteristic values ​​of the corresponding gas components.

[0014] Furthermore, the pre-obtained characteristic values ​​of the gas components of the exhaled gas are obtained as follows: characteristic values ​​of each gas component of the exhaled gas of the corresponding person when the person is in normal physical condition are obtained, and characteristic values ​​of the gas components of the exhaled gas of the corresponding person when the person has a sore throat and / or a cold are obtained; the characteristic values ​​of the same gas component in different situations are averaged as the pre-obtained characteristic values ​​of the corresponding gas components of the exhaled gas.

[0015] Furthermore, whether the two exhaled gases are similar in gas composition is determined in the following manner: a similarity value corresponding to the gas component is obtained according to a difference in characteristic values ​​of the same gas component of the two exhaled gases, and a weighted sum is obtained by taking the similarity values ​​of the various gas components; if the weighted sum is greater than a preset weight threshold, the two exhaled gases are considered to be similar in gas composition.

[0016] Furthermore, the pre-obtained characteristic values ​​of gas components of the exhaled gas include characteristic values ​​of each gas component of the exhaled gas of the corresponding person when the person is in normal physical condition, and also include characteristic values ​​of the gas components of the exhaled gas when the person has a sore throat and / or a cold. During the comparison, based on the current situation selected by the person being tested, the pre-obtained characteristic values ​​of each gas component of the exhaled gas under the same situation are used for comparison, and based on the comparison result, it is determined whether the two exhaled gases are similar in gas composition.

[0017] The beneficial effects of the present invention are: The alcohol testing device based on gas composition analysis of the present invention detects the exhaled gas composition of the breath test after the person being tested has registered his / her identity, and compares it with the exhaled gas composition collected in advance from the person corresponding to the registered identity. By comparing the similarity of the comparison results, it is judged whether the person being tested who is performing the breath test is consistent with the registered identity. This can effectively prevent the cheating problem of the existing alcohol testing in which other people take the place of others in the breath test after the identity is registered, and there is no need for supervision by on-duty personnel, thus saving manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a method flow chart of the detection method for anti-cheating by breath testing of wine of the present invention; Figure 2 It is a schematic diagram of cheating in the existing drinking detection method based on continuous iris recognition; Figure 3 Schematic diagram of the principle of gas composition analysis in Example 1. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] The idea of ​​the present invention is to solve the cheating problem of existing alcohol testing by blowing on behalf of others through a hose to the alcohol detector, and invent a method for alcohol testing that can confirm the identity of the person being tested by detecting breath components. Within a certain small range of people, a sample database of the gas components of each person's exhaled gas is established in advance. Before the breath test, the personal identity is registered. During the breath test, the gas components of the exhaled gas are analyzed at the same time, and compared with the sample data of the registered personal identity in the database, so as to determine whether the person who blows the breath test and the registered identity are the same person. Since the alcohol test result and identity confirmation come from the same breath test, the problem of blowing on behalf of others is effectively eliminated. At the same time, the analyzed gas components of the exhaled gas are not compared with all the sample results in the database to determine the identity, but a one-to-one comparison is made based on the registration result and the sample result of the corresponding identity. It is only necessary to determine whether the two are similar, thereby reducing the amount of calculation and greatly reducing the problem of inaccurate identity identification based on gas component detection.

[0021] The gas components exhaled by the human body include: nitrogen (N2), oxygen (O2), carbon dioxide (CO2), argon (Ar), neon (Ne), helium (He), krypton (Kr), xenon (Xe), etc. The exhaled gas components vary from person to person. The exhaled gas of the human body can be detected by temperature sensors, humidity sensors and gas composition sensors to form each person's unique physiological characteristics, so it is possible to confirm personal identity through exhaled breath component detection.

[0022] However, due to the limited differences in gas composition between different people, the error rate of identifying the corresponding person from a large number of people through the collected gas composition characteristics is very high. Therefore, there are currently no practical application conditions for directly using the exhaled gas composition to compare and identify the corresponding person in a large number of personnel samples.

[0023] However, the present invention takes into account that the number of locomotive crew members is limited. Within a certain number of personnel sample spaces, a database of the exhaled gas component content of each person is established. Then, before the on-duty alcohol test, the identity of the crew member is identified (this identity should be the same as the crew member identity in the scheduling plan), and while blowing for alcohol, the exhaled gas composition of the alcohol tester is detected in real time, and then compared with the exhaled gas component content data of the personnel sample corresponding to the identity of the alcohol tester identified previously to determine whether they are the same person. If the deviation between the real-time detected exhaled gas component content and that in the sample is too large, greater than a preset condition, it is considered that there is a situation of blowing in place, that is, according to the scheduling plan, the crew member who should currently be on duty is suspected of looking for a gun to replace the blowing for alcohol testing.

[0024] That is to say, the present invention uses the exhaled gas composition for identity confirmation by adopting a 1:1 identity comparison method rather than a 1:N identity search method, that is, it is only necessary to compare the current exhaled gas composition of the person being tested for breath alcohol testing with the sample data corresponding to the identity-identified flight attendant to be on duty. This comparison method can effectively reduce the error rate of identity identification based on the exhaled gas composition.

[0025] Based on the above concept, the breath alcohol test to prevent cheating detection method of the present invention requires sampling of exhaled gas samples of all flight attendants in advance. To improve the accuracy of the detection, sampling should be performed in various states of each flight attendant as much as possible, such as when the body is normal, when suffering from internal heat or cold, etc.; normal body state also includes different conditions such as before meals, after meals, after exercise and at rest. The exhaled gas sample data obtained from each flight attendant is stored in association with the corresponding flight attendant identity to form a database of exhaled gas sample data for each flight attendant.

[0026] Method Example 1: The present invention provides a method for detecting alcohol and preventing cheating based on gas composition analysis. The on-duty flight attendant needs to undergo alcohol testing before taking up his post. Figure 1The process of the breath alcohol testing anti-cheating detection method of the present embodiment is as follows: 1) The on-duty flight attendant must first register his / her identity. The registered identity must match the identity of the flight attendant who is currently on duty according to the duty list. If the registered identity does not match the duty list, the process ends and no subsequent steps are executed. The flight attendant can be further refused to work by, for example, notifying the on-duty personnel or closing the access control. The result of this identity registration can also be used as attendance data. Specifically, under the premise of having sufficient measures to prevent proxy registration and punching in, personal identity can be registered by entering the work number, ID number, or scanning the ID card, work badge, or other card swiping methods; of course, identity registration can also be completed by confirming the identity through fingerprint recognition, face recognition, or iris recognition; 2) After registering their identity, the flight attendant who has completed the identity registration confirmation shall blow into the air port of the detection device as the person being tested; at the same time, according to the registered identity, the exhaled gas sample data of the flight attendant corresponding to the registered identity shall be retrieved from the database for standby use, waiting for comparison; 3) After the person being tested blows, the breath alcohol detection method of the prior art is used to detect whether the person being tested has drunk alcohol; at the same time, the gas composition of the breath of the person being tested is also identified and analyzed, and compared with the breath sample data of the crew member corresponding to the identity registered in step 1) (that is, the spare sample data retrieved in step 2), and it is determined according to the preset judgment standard whether the breath composition of the person blowing (that is, the person being tested) is consistent with the breath sample data of the crew member registered with the identity; 4) If it is judged that the breath composition of the person who blows (i.e. the person being tested) is consistent with the breath sample data of the crew member corresponding to the identity registration, it is considered that the crew member who has completed the identity confirmation is indeed the person being tested who blows into the breath port of the detection device, and no substitution of blowing or testing is found, and the alcohol test result is registered normally; if the breath composition of the person who blows (i.e. the person being tested) is significantly different from the breath sample data of the crew member corresponding to the identity registration, it is impossible to judge that the breath composition of the person who blows (i.e. the person being tested) is consistent with the breath sample data of the crew member corresponding to the identity registration according to the preset standard, that is, the person being tested who blows into the breath port of the detection device may not be the crew member who has completed the identity confirmation, and there is a possibility of blowing or asking someone else to test alcohol after identity registration, and abnormal alarm processing is performed at this time; 5) After an abnormal alarm is given, the on-duty personnel may be further notified to check and handle the situation; or, considering the possibility of misjudgment, the person being tested may re-register their identity and undergo breath testing. If, based on the preset standards, it is determined that the exhaled gas composition of the person blowing (i.e. the person being tested) is consistent with the exhaled gas sample data of the flight attendant corresponding to the identity registration, the on-duty personnel may be notified to check and handle the situation.

[0027] Specifically, in step 3), the detection of exhaled gas components can be performed in the following manner: The method for detecting the components of exhaled gas is described using the eight main gas components of human exhaled gas, namely nitrogen (N2), oxygen (O2), carbon dioxide (CO2), argon (Ar), neon (Ne), helium (He), krypton (Kr), and xenon (Xe). In addition, the following specific implementations further add two indicators, temperature and humidity of exhaled gas, as components of exhaled gas to verify whether the identity of the blower is the registered identity. As other implementations, only the content of different types of gases can be used as the gas component characteristics of the exhaled gas for identity verification; of course, the types of gases are not limited to the above eight types, and the types of gases can be increased or decreased according to actual conditions, such as detection methods and other factors.

[0028] Firstly, after the person blows, before, after or at the same time as the breathalyser is tested for alcohol, a fixed volume of gas is collected from the person's exhaled gas using an air pump and an air bag. The fixed gas volume should be less than the volume of gas that a normal person can exhale at one time to avoid insufficient gas to be tested, for example, 0.1 cm³ is collected each time.

[0029] The fixed volume of gas collected is further Figure 3 As shown, the components of the above 8 gases are analyzed in turn through their respective gas sampling channels through their respective gas sensors; the components of multiple gases can also be analyzed at one time through a gas sensor capable of analyzing multiple components, or through a gas optical analysis method; the volume, content or corresponding reaction value of each of the above 8 gases in a fixed volume of gas is analyzed, and the temperature and humidity of the gas are detected at the same time, and then the volume, content or corresponding reaction value of each of the above 8 gases and the temperature and humidity are sent to the gas composition analysis module, and the gas characteristic value data table is formed after the necessary data cleaning, processing and conversion are performed by the gas composition analysis module.

[0030] The following table (Table 1) shows the characteristic value data table of different gas components of the exhaled gas collected by the blower at a certain time. The characteristic values ​​in the table are obtained by obtaining the current or voltage signal generated by the sensor reaction, or the component cost content value set by optical analysis, and then the characteristic value is obtained by a preset internal conversion formula.

[0031] Table 1 For example, a certain gas reacts with the sensor to generate a current signal. The corresponding value of 1mA is defined as 5000. If the test current is 0.2mA, the corresponding value is 1000. By collecting each person's exhaled gas to form a fixed volume of gas, and calculating the characteristic values ​​of each gas component to form an array of characteristic values ​​for each person, multiple measurements can be taken and the average value of the characteristic value calculated for each gas component can be used as the final characteristic value.

[0032] When forming the exhaled gas sample data of each flight attendant, multiple measurements can be taken for different physical conditions to obtain the characteristic values ​​of each gas component under different physical conditions, and then the characteristic values ​​of each gas component are averaged respectively to form a characteristic value data table of each component of the exhaled gas of the corresponding flight attendant as shown in Table 1, which is then stored as sample data.

[0033] The characteristic values ​​of each gas component under each physical state can also be averaged by multiple measurements.

[0034] An example of a method for judging whether the exhaled gas composition of the blower (i.e., the person being tested) is consistent with the exhaled gas sample data of the registered flight attendant according to the preset judgment standard is as follows: In step 3), when performing identity comparison, the collected gas is converted to a numerical value through the sensor and the gas analysis module to obtain a test array of the gas during the test (it can also form a characteristic value data table of different gas components as shown in Table 1). The characteristic values ​​of different gas components in the test array are compared with the characteristic values ​​of the corresponding gas components in the sample data. The column after the characteristic value in Table 1 is the allowable error of the corresponding characteristic value when comparing, that is, the deviation of the characteristic value of the gas component in the test array and the corresponding gas component in the sample data is within the corresponding allowable error range, that is, the gas component index is considered to be similar. If all gas component indexes or gas component indexes of a set ratio in the test array are similar to the corresponding gas components in the sample data, then the confidence that the corresponding blower and the crew member corresponding to the sample data are the same person is high, and through identity verification, it can be determined that they are the same person; otherwise, it is considered that the identity verification has not been passed, and it cannot be determined that the corresponding blower and the crew member corresponding to the sample data are the same person.

[0035] As another embodiment, the identity verification result can also be output by weighted summing the comparison results of different gas components and comparing them with the weight threshold. Specifically, the characteristic values ​​of each gas component in the test array are compared with the corresponding gas components in the sample data, and whether the gas meets the similarity standard is determined based on the allowable error. For example, the test value (characteristic value) of xenon (Xe) in the test array is 150, and the sample value (characteristic value) of xenon (Xe) in the corresponding crew member's sample data is 200, and the allowable error of xenon (Xe) is 70%. The deviation between the test value 150 and the sample value 200 is 50, and the allowable error is 70% of the sample value 200, that is, 140. Obviously, the deviation of 50 between the test value 150 and the sample value 200 is within the allowable error range, and the similarity value of the gas component (xenon) is set to 1.

[0036] The characteristic value comparison of other gas components is also carried out according to the above process. If the deviation is within the allowable error range, the similarity value of the corresponding gas component is set to 1. If the deviation is not within the allowable error range, the similarity value of the corresponding gas component is set to 0. Finally, the comparison results shown in the following table (Table 2) are obtained: Table 2 In the comparison results in the above table (Table 2), a weight is set for each gas component, and the weight value of the corresponding gas component is obtained by multiplying the similarity value (0 or 1) by the weight, that is, when the similarity value is 0, the corresponding weight value is zero; when the similarity value is 1, the corresponding weight value is the corresponding weight. For example: nitrogen (N2), the similarity value is 1, the weight is 10, then its corresponding weight value is 1×10=10; oxygen (O2), the similarity value is 0, the weight is 10, then its corresponding weight value is 0×10=0.

[0037] As another embodiment, the similarity value can be set to 3 or more similarity values ​​according to the size of the deviation between the test value and the sample value. For example, when the deviation between the test value and the sample value is greater than the allowable error, the similarity value is 0; when the deviation between the test value and the sample value is between the allowable error and half of the allowable error, the similarity value is 0.5; when the deviation between the test value and the sample value is between half of the allowable error and one-quarter of the allowable error, the similarity value is 1; when the deviation between the test value and the sample value is less than one-quarter of the allowable error, the similarity value is 1.2; that is, the smaller the deviation, the greater the similarity value, and when calculating the weight value, the closer the test value is to the sample value, the higher the weight value that the corresponding gas component can obtain based on the weight.

[0038] After calculating the weight values ​​of each gas component, the weight values ​​are accumulated to obtain the total weight, and the total weight is compared with a predetermined appropriate weight threshold. The test array with a total weight greater than or equal to the weight threshold can be judged as passed (i.e., the person who blows the gas is determined to be the same person as the crew member corresponding to the sample data for comparison); the test array with a total weight less than the weight threshold can be judged as failed (i.e., it cannot be determined that the person who blows the gas is the same person as the crew member corresponding to the sample data for comparison). It can be seen that the higher the weight threshold, the lower the possibility of missed judgment (non-identical person judged as the same person), and the higher the possibility of wrong judgment (the same person judged as non-identical person); the lower the weight threshold, the higher the possibility of missed judgment (non-identical person judged as the same person), and the lower the possibility of wrong judgment (the same person judged as non-identical person). The weight threshold can be determined to a value of appropriate size based on multiple experiments, which can achieve the best balance between missed judgment and wrong judgment, and reduce the possibility of missed judgment and wrong judgment to an acceptable and reasonable range.

[0039] In this embodiment, the weight threshold is set to 80. The comparison results shown in Table 2 have a total weight of 105, which is greater than the weight threshold of 80, that is, the corresponding blower passes the identity verification and is considered to be the same person as the flight attendant corresponding to the compared sample data.

[0040] Specifically, the allowable error can be determined based on the discrete degree of the characteristic value of the corresponding gas component when the same person is tested multiple times. For example, the gas component is tested multiple times on different people, and the characteristic values ​​of the corresponding gas components in the test results are counted. The range intervals in which the characteristic values ​​of the gas components of different people fall in the results of multiple tests are counted by mathematical statistics, and the allowable error is determined based on the size of the range interval. The larger the range interval, the larger the corresponding allowable error; the smaller the range interval, the smaller the corresponding allowable error.

[0041] The weight can be determined based on the degree of correlation between the similarity between the corresponding gas component test data and the sample data and the final test result during the actual test. For example, if a person is tested 10 times and compared with the sample data of the person, and a certain gas component is similar 8 times in the results, the weight of the gas component can be set to 30; if a certain gas component is similar 6 times in the results, the weight of the gas component can be set to 20; if a certain gas component is similar 5 times in the results, the weight of the gas component can be set to 10; in the 10 test results of the same person, different similarity times correspond to one weight. Further, the above test can be repeated for multiple people, and the corresponding gas component similarity times in the 10 test results of different people are averaged to obtain the corresponding weight.

[0042] Method Example 2: The difference from Example 1 is that the characteristic values ​​of each gas component under different physical states are counted respectively, and when the corresponding crew member's exhaled gas sample data is established, labels of different physical states are added, and characteristic values ​​of each gas component are stored corresponding to different physical states. During the breath test, the person being tested selects the corresponding physical state option on the detection device according to his current physical state. The detection device retrieves the characteristic values ​​of each gas component under the corresponding physical state label of the corresponding crew member from the database, and compares and judges with the current exhaled gas components of the person being tested. The accuracy of the test is improved by distinguishing the physical states for comparison.

[0043] The specific method for detecting the exhaled gas components and the comparison and judgment method based on the preset judgment standard are the same as those in Example 1, and will not be described in detail in this embodiment.

[0044] Device Example: The alcohol testing device based on gas composition analysis of this embodiment includes an identity registration module, a breath alcohol testing module and a gas composition detection and comparison module. The identity registration module includes a keyboard for inputting identity information, a card reading module and a fingerprint and face recognition module, etc. The breath alcohol testing module is used for the person being tested to blow alcohol, and the gas composition detection and comparison module uses the gas exhaled by the person being tested received by the breath alcohol testing module to detect and compare the gas composition. The specific identity registration, alcohol testing, and detection and comparison of the gas composition of the exhaled gas have been explained clearly enough in the method embodiment and will not be repeated here.

Claims

1. A method for preventing cheating in alcohol testing based on gas composition analysis, characterized in that: After registering their identity, the person being tested will take a breathalyzer test, and the characteristic values ​​of different gas components of the exhaled gas of the person being tested will be analyzed. The values ​​will be compared with the characteristic values ​​of different gas components of the exhaled gas of the person with the registered identity obtained in advance, and based on the comparison results, it will be determined whether the two exhaled gases are similar in gas composition; if they are similar, it is considered that the person being tested matches the registered identity.

2. The method for preventing cheating in alcohol testing based on gas composition analysis according to claim 1 is characterized in that: The characteristic values ​​of the gas components of the exhaled gas are obtained as follows: A certain amount of gas to be analyzed is collected from the exhaled gas, and the gas to be analyzed is passed through a number of set different gas sensors to obtain characteristic values ​​of corresponding gas components.

3. The method for preventing cheating in alcohol testing based on gas composition analysis according to claim 2 is characterized in that: The method for obtaining the gas component characteristic values ​​of the exhaled gas obtained in advance is as follows: obtaining the characteristic values ​​of each gas component of the exhaled gas of the corresponding person when the body condition is normal, and also obtaining the characteristic values ​​of the gas component of the exhaled gas of the corresponding person when the person has a sore throat and / or a cold; averaging the characteristic values ​​of the same gas component in different situations as the pre-obtained characteristic value of the corresponding gas component of the exhaled gas.

4. The method for preventing cheating in alcohol testing based on gas composition analysis according to claim 1, characterized in that: Whether the two exhaled gases are similar in gas composition is determined in the following manner: a similarity value corresponding to the gas component is obtained according to a difference in characteristic values ​​of the same gas component of the two exhaled gases, and a weighted sum is obtained by weighting the similarity values ​​of the various gas components. If the weighted sum is greater than a preset weight threshold, the two exhaled gases are considered to be similar in gas composition.

5. The method for preventing cheating in alcohol testing based on gas composition analysis according to claim 1 is characterized in that: The pre-acquired characteristic values ​​of the gas components of the exhaled gas include the characteristic values ​​of the various gas components of the exhaled gas of the corresponding person when the person is in normal physical condition, and also include the characteristic values ​​of the gas components of the exhaled gas when the person has a fever and / or a cold. When comparing, the pre-acquired characteristic values ​​of the various gas components of the exhaled gas under the same circumstances are used for comparison based on the current situation selected by the person being tested.

6. A wine testing device based on gas composition analysis, characterized in that: The alcohol test is completed through the following steps: after the person being tested registers his / her identity, the exhaled gas of the person being tested is received, the exhaled gas of the person being tested is analyzed to obtain characteristic values ​​of different gas components, and the characteristic values ​​of different gas components of the exhaled gas of the person with the registered identity are compared with the corresponding characteristic values ​​of different gas components of the exhaled gas of the person with the registered identity obtained in advance to determine whether the two exhaled gases are similar in gas composition; if similar, it is considered that the person being tested matches the registered identity.

7. The alcohol testing device based on gas composition analysis according to claim 6 is characterized in that: The characteristic values ​​of the gas components of the exhaled gas are obtained as follows: A certain amount of gas to be analyzed is collected from the exhaled gas, and the gas to be analyzed is passed through a number of set different gas sensors to obtain characteristic values ​​of the corresponding gas components.

8. The alcohol testing device based on gas composition analysis according to claim 7 is characterized in that: The method for obtaining the gas component characteristic values ​​of the exhaled gas obtained in advance is as follows: obtaining the characteristic values ​​of each gas component of the exhaled gas of the corresponding person when the body condition is normal, and also obtaining the characteristic values ​​of the gas component of the exhaled gas of the corresponding person when the person has a sore throat and / or a cold; averaging the characteristic values ​​of the same gas component in different situations as the pre-obtained characteristic value of the corresponding gas component of the exhaled gas.

9. The alcohol testing device based on gas composition analysis according to claim 6, characterized in that: Whether the two exhaled gases are similar in gas composition is determined in the following manner: a similarity value corresponding to the gas component is obtained according to a difference in characteristic values ​​of the same gas component of the two exhaled gases, and a weighted sum is obtained by weighting the similarity values ​​of the various gas components. If the weighted sum is greater than a preset weight threshold, the two exhaled gases are considered to be similar in gas composition.

10. The alcohol testing device based on gas composition analysis according to claim 6, characterized in that: The pre-obtained characteristic values ​​of the gas components of the exhaled gas include the characteristic values ​​of the various gas components of the exhaled gas of the corresponding person when the person is in normal physical condition, and also include the characteristic values ​​of the gas components of the exhaled gas when the person has a sore throat and / or a cold. When comparing, based on the current situation selected by the person being tested, the pre-obtained characteristic values ​​of the various gas components of the exhaled gas under the same situation are used for comparison, and based on the comparison results, it is determined whether the two exhaled gases are similar in gas composition.

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