Infrared alcohol sensor and traceability detection system

Abstract

The invention discloses an infrared alcohol sensor and a traceability detection system, and particularly relates to the technical field of infrared alcohol detection, and the infrared alcohol sensor comprises a central processing unit used for cooperating with each unit to synchronously complete all actions, and a display unit used for displaying infrared test alcohol gas molecule concentration C (t), blowing flow f (t) and blowing cumulative total volume V (t) in real time. By adopting the advantages of an infrared measurement technology, the method has the advantages of rapidness, accuracy and the like, an alcohol concentration result is analyzed in real time in cooperation with the whole air blowing process of a testee, the whole measurement process can be traced, whether the testee cheats or mistakenly measures such as insufficient air blowing amount, residual alcohol in the oral cavity and residual alcohol in the trachea or not can be diagnosed, and the method is beneficial to law enforcement fairness and high efficiency. And meanwhile, related measurement information in the whole real-time measurement process is displayed in real time and is also recorded in a memory or transmitted to a background server through a 4 / 5G network for backup, so that the traffic police can conveniently play back a tested proposal and an objection to form law enforcement evidence when encountering the tested proposal.

Description

Technical Field

[0001] The present invention relates to the technical field of alcohol detection, and in particular to an infrared alcohol sensor and a traceability detection system. Background Art

[0002] Alcohol concentration detection technology is of great significance in public safety and traffic law enforcement, especially in the monitoring and governance of drunk driving. At present, traffic law enforcement personnel widely use alcohol detection equipment to test the alcohol content of drivers to ensure road traffic safety. However, traditional alcohol detection equipment has certain limitations in actual use and cannot fully meet the growing requirements of law enforcement accuracy, fairness and traceability.

[0003] Traditional detection technologies mainly rely on fuel cell-type electrochemical sensors. Although these technologies can detect alcohol concentration to a certain extent, their stability and accuracy are often affected by environmental conditions (such as temperature, humidity, etc.). In addition, these devices usually need to be calibrated regularly, and each calibration process is complicated and time-consuming, which increases the cost of use and maintenance. At the same time, because some drivers may try to circumvent the test by blowing insufficiently or deliberately polluting the detection environment, traditional detection technology has great limitations in cheating identification and data tracking, and it is difficult to provide sufficient evidence support for law enforcement.

[0004] The common alcohol testers on the market currently have the following major problems: 1. Traditional testers require regular calibration of each device, otherwise the measurement results may be inaccurate due to sensor drift, which not only increases maintenance costs but also may delay the law enforcement process; 2. Environmental factors such as temperature, humidity, and insufficient blowing or intentional cheating by the test subject will interfere with the measurement results and cause data misjudgment or mismeasurement; 3. Many traditional devices lack complete traceability functions and cannot record and replay the entire test process in real time, making it difficult to respond to objections from the test subject or provide strong evidence for law enforcement; 4. Traditional equipment is usually designed for a single purpose and is difficult to adapt to the needs of measuring different gases or to be used in new law enforcement scenarios.

[0005] In order to solve the above problems, we provide an infrared alcohol sensor and traceability detection system. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings in the prior art and to propose an infrared alcohol sensor and a traceability detection system.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An infrared alcohol sensor and traceability detection system, including a central processing unit for coordinating various units to synchronously complete all actions, a display unit for real-time display of infrared alcohol test gas molecule concentration C(t), blowing flow f(t), and blowing cumulative total volume V(t), a storage unit for real-time storage of information of the entire test process and measurement of the final judgment result, an infrared alcohol measurement unit for sampling independent dual-optical path channels to detect the concentration of measured gas molecules, a network interface for synchronous or offline downloading of data records of the entire measurement process, and a back-end server for uploading to a traffic police through the network interface, which can be replayed and reviewed when the testee has objections or needs to provide law enforcement evidence.

[0009] The present invention is further configured such that: the display unit displays the final curve C(t) of the alcohol gas molecule concentration value in real time during the measurement process, and monitors the entire gas molecule concentration change process.

[0010] The present invention is further configured as follows: when the background server plays back the measurement process data, it is mainly based on the test storage time axis t, and records f(t), V(t), and C(t) on this time axis, so as to dynamically form a dynamic video of the blowing measurement process, and also form a measurement process with a time axis t curve graph, plus its reference or auxiliary information as a basis for law enforcement judgment.

[0011] The present invention is further configured as follows: the data records of the background server can be synchronously uploaded to the traffic police background server and stored in the local device to prevent the possibility of illegal data tampering or cheating. If any related data of the same item is abnormal, it will be locked by the background server and a monitoring abnormality record will be formed to remind the background management personnel to intervene and handle it.

[0012] The present invention is further configured as follows: the infrared alcohol measuring unit includes an air chamber, an infrared light emitting tube is arranged at one end of the air chamber, a first light detector and a second light detector are arranged at an end of the air chamber away from the infrared light emitting tube, an air inlet is arranged on a side of the air chamber adjacent to the end of the infrared light emitting tube, a flow sensor is arranged on the air inlet, and an air outlet is arranged on a side of the air chamber adjacent to the end of the first light detector and the second light detector.

[0013] The present invention is further configured as follows: the outer surface of the infrared light-emitting tube is nested and docked at one end of the air chamber, the first light detector and the second light detector are combined and docked at an end of the air chamber away from the infrared light-emitting tube, the air inlet is opened at an end of the air chamber adjacent to the infrared light-emitting tube, the flow sensor is docked at the air inlet, and the air outlet is opened at an end of the air chamber adjacent to the first light detector and the second light detector.

[0014] The present invention is further configured as follows: the air chamber is divided into two channels, a standard gas source is placed in the first channel, the standard gas source on this channel is closed, the gas molecules to be measured cannot flow into the closed part, the closed part is a transparent material, and only infrared light can pass through; the second channel is used to pass the gas molecules to be measured, the gas enters from the air inlet and goes out from the air outlet, and at the same time there is a flow sensor in the air inlet channel, which can monitor the size and direction of the airflow in the second channel in real time.

[0015] The present invention is further configured as follows: the infrared light emitted by the infrared light emitting tube passes through two optical channels of the gas chamber, and the light energy on the first optical channel is absorbed by the gas molecules of the standard gas source, and the unabsorbed light energy is captured by the first detector; the light energy on the second optical channel is absorbed by the gas molecules to be tested, and the unabsorbed light energy is captured by the second detector, wherein the detector can select a filter of corresponding wavelength according to the wavelength of the absorption light required by different measuring gases.

[0016] The beneficial effects of the present invention are:

[0017] 1. The infrared alcohol measurement of the present invention adopts two gas analysis channels, wherein the first channel analyzes the standard gas and the second channel analyzes the measured gas. The actual concentration of the measured gas is obtained by measuring the signal ratio change of the two gas channels. This method does not require frequent calibration and can save the need to calibrate each machine separately. Since a unified reference source is used, the standard gas of the second channel can automatically calibrate the instrument. It is only necessary to calibrate the gas source on the standard gas channel. At the same time, different gas reference sources or detection filters can be replaced to measure the concentrations of different gases.

[0018] 2. The present invention adopts the advantages of infrared measurement technology, which has the advantages of being fast and accurate. It can analyze the alcohol concentration results in real time during the entire process of the test subject's blowing, trace the entire measurement process, and diagnose whether the test subject has cheated or mismeasured, such as insufficient blowing volume, residual alcohol in the mouth, and residual alcohol in the trachea. It is beneficial to law enforcement fairness. At the same time, the relevant measurement information of the entire real-time measurement process is not only displayed in real time, but also recorded in the memory or transmitted to the background server through the 4 / 5G network for backup, which is convenient for traffic police to replay when encountering objections raised by the test subject to form law enforcement evidence. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the flow of the traceability detection system in the present invention.

[0020] Figure 2 Schematic diagram of airflow direction in the present invention.

[0021] Figure 3 Schematic diagram of light direction in the present invention.

[0022] Figure 4 It is a schematic diagram of the alcohol test in the present invention.

[0023] Figure 5 It is a schematic diagram of the alcohol test curve change in the present invention.

[0024] Figure 6 It is a schematic diagram of the 100ppm standard gas test curve in the present invention.

[0025] Figure 7 Schematic diagram of the alcohol gas concentration and the total amount of blowing accumulated at each time point of 18-20 L / min blowing in the present invention Figure 1 .

[0026] Figure 8 Schematic diagram of alcohol gas concentration and blowing flow rate at each time point of 18-20L / min blowing in the present invention Figure 1 .

[0027] Fig. 9 Schematic diagram of the alcohol gas concentration and the total amount of blowing accumulated at each time point of 18-20 L / min blowing in the present invention Figure 2 .

[0028] Fig.10 Schematic diagram of alcohol gas concentration and blowing flow rate at each time point of 18-20L / min blowing in the present invention Figure 2 .

[0029] Fig.11 Schematic diagram of the alcohol gas concentration and the total amount of blowing accumulated at each time point of 18-20 L / min blowing in the present invention Figure 3 .

[0030] Fig.12 Schematic diagram of alcohol gas concentration and blowing flow rate at each time point of 18-20L / min blowing in the present invention Figure 3 .

[0031] Legend:

[0032] 1. Infrared light emitting tube; 2. First light detector; 3. Second light detector; 4. Air inlet; 5. Air outlet; 6. Standard air source; 7. Air chamber; 8. Flow sensor. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Example 1

[0035] like Figure 1As shown, an infrared alcohol sensing traceability detection system includes a central processing unit for coordinating various units to synchronously complete all actions, a display unit for real-time display of infrared alcohol test gas molecule concentration C(t), blowing flow f(t), and blowing cumulative total volume V(t), a storage unit for real-time storage of information of the entire test process and measurement of the final judgment result, an infrared alcohol measurement unit for sampling independent dual-optical path channels to detect the concentration of measured gas molecules, a network interface for synchronous or offline downloading of data records of the entire measurement process, and a back-end server for uploading to a traffic police through a network interface, which can be replayed and reviewed when the person being tested has objections or needs to provide law enforcement evidence.

[0036] In the above embodiment, the central processing unit coordinates with each unit to synchronously complete all actions. The central processing unit continuously monitors all test information during the human breath blowing process detected by the infrared alcohol measurement unit, and synchronously displays it through the display unit. After the entire measurement action is completed, the test results and test process data are actively stored in the local storage unit. At the same time, the test results and test process data are also actively uploaded to the background server through the network interface for storage. The background data management personnel can view and print at any time to provide original evidence for relevant law enforcement.

[0037] Example 2

[0038] like Figure 1-6 As shown, an infrared alcohol sensor, the infrared alcohol measuring unit includes an air chamber 7, an infrared light emitting tube 1 is arranged at one end of the air chamber 7, a first light detector 2 and a second light detector 3 are arranged at the end of the air chamber 7 away from the infrared light emitting tube 1, an air inlet 4 is arranged on the side of the air chamber 7 adjacent to the infrared light emitting tube 1, a flow sensor 8 is arranged on the air inlet 4, and an air outlet 5 is arranged on the side of the air chamber 7 adjacent to the first light detector 2 and the second light detector 3.

[0039] In the above embodiment, the infrared light emitted by the infrared light emitting tube 1 of the infrared alcohol detection unit of the present invention passes through two optical channels of the gas chamber 7. After the light energy on the first optical channel is absorbed by the gas molecules of the standard gas source 6, the unabsorbed light energy is captured by the detector 2; after the light energy on the second optical channel is absorbed by the gas molecules to be tested, the unabsorbed light energy is captured by the detector 3. The detector can select a filter of the corresponding wavelength according to the wavelength of the required absorption light of different measuring gases. For example, for alcohol molecules, 9.4um, 3.4um, etc. can be selected.

[0040] Among them: In order to better explain the implementation process and principle of this sensor, we take alcohol gas or one of the gases in CO2 gas as an example for detailed description: Taking the infrared detection alcohol unit to measure the concentration of alcohol gas molecules as an example, for alcohol gas molecules, the infrared spectrum absorption peak is between 3000-2500cm-1, of which the strongest is 2920cm-1, which is composed of hydroxyl groups and aromatic rings in ethanol. In addition, the far-infrared spectrum absorption peak is between 1075-1050cm-1, of which the strongest is 1060cm-1 (Note <wave number>: the reciprocal of the wavelength λ, that is, the number of waves contained in 1cm wave number cm-1 = 1 / λ = 10000000 / λnm = 10000 / λμm wave number unit: cm-1). Therefore, the present invention adopts the far-infrared spectrum absorption peak 1060cm-1 as the light source, or adopts the spectrum absorption peak 2920cm-1 light source, and adds the corresponding spectrum filter to the detection gas sensor to only respond to this specific spectrum signal.

[0041] When measuring the concentration of alcohol gas molecules, the first step is to build a closed alcohol gas molecule concentration of 100ppm on the first optical path channel inside the sensor gas chamber ⑦. The length of this standard gas source is L0. When we want to measure the concentration of the measured alcohol gas molecules, we need to let the alcohol gas enter from the air inlet ④ to fill the entire internal space of the gas chamber ⑦, and the excess alcohol molecules are discharged from the outlet ⑤. At this time, the infrared light is emitted with a wavelength of 1-12um infrared light. After passing through the two optical channels of the gas chamber ⑦, the light energy on the first optical channel is partially absorbed by the alcohol gas molecules in the standard gas source ⑥, and the unabsorbed light energy is captured by the detector ② as signal A1; the light energy on the second optical channel is partially absorbed by the alcohol gas molecules being tested, and the unabsorbed light energy is captured by the detector ③ as signal A2. Combined with Lambert-Beer's law, that is, the relationship between the strength of the absorption of a certain wavelength of light and the concentration of the absorbing substance / gas and the thickness of the substance or gas being measured, the ratio of the two optical signals is calculated to measure the concentration C of the alcohol gas molecules.

[0042] Its Lambert-Beer law relationship is:

[0043]

[0044] A is absorbance, T is transmittance, which is the ratio of the outgoing light intensity (I0) to the incident light intensity (I t ). K is the molar absorption coefficient. It is related to the properties of the absorbing substance and the wavelength λ of the incident light. C is the concentration of the measured gas molecules, in mol / L or ppm (gas concentration), and l is the absorption layer thickness or optical path.

[0045] Therefore, the signal analysis for the first channel is:

[0046] A1=K*L*C-----------(1)

[0047] The signal analysis for the second channel is:

[0048] A2=K*L*C-----------(2)

[0049] Among them, A1 and A2 are the strong and weak signals of light absorption detected by detectors ② and ③ respectively, K is the molar absorption coefficient, L is the optical path length of the light chamber, and C is the concentration of alcohol gas molecules being measured.

[0050] Where L = L0 + L1, substituting into (1) and (2), we get:

[0051] A1=K*L1*C 测 +K*L0*C 标 -----------------(3)

[0052] A2=K*(L0+L1)*C 测 ------------------------(4)

[0053] Among them, L0 is the optical path length on the standard gas source, L1 is the total optical path length of the optical chamber minus the optical path length on the standard gas source, and C 测 is the concentration of alcohol gas molecules being measured; C 标 It is the standard alcohol gas molecule concentration (100ppm).

[0054] Calculate the ratio of the two optical signals k = A2 / A1;

[0055] k=A2 / A1=K*(L0+L1)*C 测 / K*L1*C 测 +K*L0*C 标 -----------(5)

[0056] Wherein, k is the ratio of the light absorption signal detected by detector ③ to the light absorption signal detected by detector ②.

[0057] Simplify (5), that is,

[0058] C 测 =A2*K*L0*C 标 / A1*K*(L0+L1)-A2*K*L1--------------(6)

[0059] In actual design, since L0 and L1 can be adjusted according to actual conditions, L1 can also be designed to be 0. In this embodiment, L0=9*L1 is taken as an example to further simplify the concentration calculation formula (6):

[0060] C 测 =9*A2*C 标 / 10*A1-A2-----------------(7)

[0061] Substituting the ratio of the two optical signals k = A2 / A1 into (7), we can get:

[0062] C 测 =9*k*C 标 / 10-k

[0063] Among them, C 测 is the concentration of alcohol molecules being measured; C 标 is the standard alcohol molecule concentration (100ppm), which is a constant; k is the ratio of the light absorption signal detected by detector ③ to the light absorption signal detected by detector ②.

[0064] Since the concentration of the standard gas C 标 The constant is 100ppm, so the concentration of the gas molecules we measure is only a function related to the ratio of the light signals detected on the two optical channels in the sensor design. That is, based on the strength relationship between the two optical signals, it is very convenient to calculate the concentration of the detected gas molecules.

[0065] If 100ppm standard gas is placed in the first optical channel, a standard test curve can be easily obtained, such as Figure 6 This curve can also be built into the storage area of ​​the central processing unit 10 in order to save MCU computing resources. The concentration C(t) of the measured gas can be easily obtained by looking up the table.

[0066] The flow sensor⑧ of this solution can monitor the size and direction of the air flow in the second channel in real time, and transmit the gas flow information on the second channel to the information processing unit 10. Once the blowing flow is detected, the current flow value f(t) can be collected in real time, and the ratio k of the absorption signal strength A(t) of the two channels measured by the alcohol detection unit and the reference alcohol gas concentration C 标 , find the corresponding alcohol concentration value C(t):

[0067] C(t)=C 测(t) =9*k(t)*C 标 / 10-k(t)

[0068] Since infrared can measure gas concentration quickly and continuously in real time, we can continuously record the alcohol molecule concentration value at each moment, such as C(1), C(2), ... C(n), and also record the corresponding blowing flow value, f(1), f(2), ... f(n), and use the real-time flow value to integrate and calculate V(t), the formula is as follows:

[0069]

[0070] Calculate the volume and record the total volume of each puff at each puff moment. Through the relationship between the concentration and the volume of the puff at each real-time moment, accurately judge the reliability of the test result, such as determining invalid tests such as oral alcohol or residual alcohol in the air chamber pipeline. For the evaluation of invalid tests, this program is based on the requirements of GB21254-2017 regulations. Each puff must reach a volume of 1200ml. Continuous measurement is used to monitor the alcohol concentration at each moment under each puff volume in real time. The corresponding relationship is as follows:

[0071] Table 1- Description of the relationship between the total amount of cumulative blowing and the measured gas concentration value

[0072]

[0073]

[0074] The continuous real-time test process data analysis of the present invention can analyze invalid tests such as oral alcohol and residual alcohol based on the relationship between the cumulative total blowing volume at each moment and the concentration at each moment in the above table. It can even determine whether an invalid blowing test occurs or the test subject performs an invalid test by inhaling gas based on whether the gas flow value is continuous or the total amount of gas.

[0075] Example 3

[0076] like Figure 4 and Figure 5 As shown, an infrared alcohol sensing traceability detection system is used to display the infrared alcohol test gas molecule concentration C(t), the blowing flow rate f(t), and the display unit of the accumulated total blowing volume V(t) in real time.

[0077] In this embodiment, the display technology is related to the concentration C(t), the blowing flow f(t), and the cumulative total blowing volume V(t) during the entire infrared monitoring measurement process, where y1=f(t), y2=C(t), and y3=V(t).

[0078] The left half of the UI part of the present invention simulates a reaction chamber of an infrared sampling tube. When the user blows, simulated gas molecules flow continuously from the air inlet pipe into the reaction chamber from the top, wherein the movement speed of the flowing gas molecules is correlated with the user's blowing flow value y1=f(t). The larger the blowing flow value, the faster the movement speed of the gas molecules; the smaller the blowing flow value, the slower the movement speed of the gas molecules; when the blowing stops, the movement of the gas molecules also stops.

[0079] Furthermore, different colors of gas molecules are displayed to represent the correlation with the current measured gas molecule concentration value y2=C(t). For example, by monitoring the concentration of alcohol gas molecules, gas molecules of another color are generated according to the concentration. If no alcohol molecules are detected, gray gas molecules are produced to move in the simulated reaction chamber. Once alcohol molecules are monitored, gas molecules different from gray are produced in proportion to the concentration, and c(t) is intuitively displayed in the reaction chamber of the simulated infrared sampling tube.

[0080] The UI part of the present invention can display the total volume accumulated by blowing, and intuitively tell the user the blowing status, and its display is associated with y3=V(t); it can intuitively display the blowing progress, whether the specified total volume of 1200ml is reached, whether the blowing is interrupted, etc.;

[0081] Furthermore, the UI part of the present invention can display the measured alcohol molecule concentration value, which is associated with y2=C(t), and intuitively displays the alcohol molecule concentration value at each moment in the measurement process.

[0082] Example 4

[0083] like Figure 7 and Figure 8 As shown, an infrared alcohol sensing traceability detection system, the display unit displays the final curve C(t) of the alcohol gas molecule concentration value in real time during the measurement process, monitoring the entire gas molecule concentration change process.

[0084] In this embodiment, when the drinking user blows at a blowing flow rate of 18 to 20 L / min, the relationship between the alcohol gas concentration and the blowing flow rate at each time point of 18 to 20 L / min blowing is Figure 8 . Relationship between the alcohol gas concentration at each time point and the total amount of blowing accumulated at 18-20L / min Figure 7 .from Figure 7 It can be seen that when the test subject's breath volume reaches 1000ml, the test result C10 is close to the actual alcohol gas molecule concentration in the lungs. When the total breath volume accumulates to about 1200ml, C12 can accurately reflect the alcohol gas concentration in the deep lungs, which is a valid test.

[0085] Example 5

[0086] like Fig. 9 and Fig.10 As shown, an infrared alcohol sensor, the outer surface of the infrared light emitting tube 1 is nested and docked at one end of the air chamber 7, the first light detector 2 and the second light detector 3 are combined and docked at the end of the air chamber 7 away from the infrared light emitting tube 1, the air inlet 4 is opened at the end of the air chamber 7 close to the infrared light emitting tube 1, the flow sensor 8 is docked at the air inlet 4, and the air outlet 5 is opened at the end of the air chamber 7 close to the first light detector 2 and the second light detector 3.

[0087] In this embodiment, when the user blows at a blowing flow rate of 18 to 20 L / min, the relationship between the alcohol gas concentration and the blowing flow rate at each time point is Fig.10 . Relationship between the alcohol gas concentration at each time point and the total amount of blowing accumulated at 18-20L / min Fig. 9 .from Fig. 9 It can be seen that when the test subject starts to blow, an alcohol reading can be detected. When the total amount of blowing is 300ml, the gas concentration C3 drops rapidly until it is close to 0 when blowing to C12+. This is equivalent to that we can clearly detect the entire gas concentration change curve during the blowing process. From C0 to C12+, the alcohol concentration reading gradually decreases, indicating that the alcohol gas concentration in the deep lung is 0. It can be easily identified that this test is caused by residual gas interference in the pipeline, that is, an invalid test. The traffic police are prompted to ask the test subject to retest.

[0088] Example 6

[0089] like Fig.11 and Fig.12 As shown, an infrared alcohol sensor has an air chamber 7 divided into two channels. A standard gas source 6 is placed in the first channel. The standard gas source 6 on this channel is closed, and the gas molecules to be measured cannot flow into the closed part. The closed part is made of transparent material, and only infrared light can pass through. The second channel is used to pass the gas molecules to be measured. The gas enters from the air inlet 4 and goes out from the air outlet 5. At the same time, there is a flow sensor 8 in the air inlet channel, which can monitor the size and direction of the airflow in the second channel in real time.

[0090] In this embodiment, when the user blows at a blowing flow rate of 18 to 20 L / min, the relationship between the alcohol gas concentration and the blowing flow rate at each time point is Fig.12 The relationship between the alcohol gas concentration at each time point and the total amount of breath accumulated Fig.11 .from Fig.11 It can be seen that when the test subject starts to blow, the detection concentration C0 is 0mg / L. When the cumulative blowing volume of the user reaches 300ml, the test result C3 alcohol gas molecule concentration reaches the maximum value. When the user continues to blow, the alcohol concentration C4...C12, C12+ gradually decreases, which can reflect that the test process is suspected to be interfered by oral alcohol, and the test is invalid. The traffic police are prompted to ask the test subject to retest.

[0091] Example 7

[0092] like Figure 1 As shown, an infrared alcohol sensor traceability detection system is used to store the information of the entire test process in real time and to measure the storage unit of the final judgment result.

[0093] In this embodiment, the storage unit data record includes:

[0094] -UDI for measuring equipment

[0095] -Measurement counter

[0096] - Measurement start time and date

[0097] -Information recording at each moment during the measurement process (including the blowing flow rate f(t) and volume V(t) at each moment, and real-time blowing concentration C(t) results)

[0098] - Measurement end time and date

[0099] -Measurement results (test data results and qualitative results)

[0100] -Information entered by the tester and the person being tested during measurement (including fingerprint / user name / location information / document information / on-site evidence collection information)

[0101] Each measurement process data record consists of the following parts and forms an association, which is convenient for users or tested persons to trace the source and form favorable law enforcement evidence, as shown in the following table.

[0102]

[0103]

[0104] Working principle: In the present invention, the central processing unit coordinates with each unit to synchronously complete all actions during use. The central processing unit continuously monitors the state of the infrared alcohol measurement unit and obtains the flow value f(t) of the unit in real time. There are many ways to obtain the flow value, which can be calculated by using a flow sensor / pressure sensor, etc. Once the central processing unit detects that the flow value has changed or reaches a preset blowing threshold (such as 6L / Min), the central processing unit starts to drive the infrared light-emitting tube to emit a fixed wavelength and power signal with a 2-10HZ frequency and a certain duty cycle signal. After the infrared light passes through the air chamber, a part of the photon signal will be absorbed by the alcohol gas molecules, and the rest will be received by the infrared detector to form an electrical signal A(t), which is amplified and filtered and then transmitted to the central processing unit to calculate the concentration C(t) of the alcohol gas molecules; the synchronous central processing unit calculates the total cumulative volume of the blowing based on the flow value f(t) obtained in real time.

[0105] The central processing unit records the relevant parameters at each time point in the entire blowing process, including f(t), V(t), and C(t); these parameters form three corresponding curves based on the time axis t of the entire measurement process.

[0106] The CPU can judge whether the flow value at each time point on the f(t) curve is stable, whether the user blows air continuously from the human body, whether there is any interruption in the middle, whether there is any cheating by inhaling during the blowing, whether the blowing flow is too large or too small, etc.

[0107] Based on the total volume of air blown on the V(t) curve and the gas molecule concentration C(t) at each time point, the central processor can determine whether the cumulative air blown volume meets the standard, whether the air blown alcohol concentration result is valid, and whether it is oral alcohol or residual alcohol in the pipeline. For example, a volume of 0-300ml is defined as the residual alcohol gas molecule concentration reading in the pipeline, and 300ml-900ml is defined as the alcohol gas molecule concentration reading in the oral cavity and upper respiratory tract or lung surface; 1200ml is the truly effective deep lung alcohol gas molecule concentration reading.

[0108] The central processing unit synchronously outputs the three curves of the entire test process directly to the display unit for real-time display, so that the tester and the tested person can more intuitively see whether it is legal and compliant. After the test process is completed, the central processing unit directly analyzes the final measurement results and test values ​​based on the correlation of f(t), V(t), and C(t) parameters. Such as whether the blowing process is interrupted, whether the blowing is inhaled, whether the blowing flow is too large or too small, whether the cumulative blowing volume meets the standard, whether the blowing alcohol concentration result is valid, whether it is oral alcohol, or pipe residue, etc., these test results are also displayed synchronously.

[0109] When the measurement process is completed, the central processor automatically analyzes the results and proactively stores the measurement time and date, its own UDI, user-entered information, measurement-related process data and final qualitative results in a non-volatile storage unit for users to view later or provide a basis for law enforcement.

[0110] When the measurement process is completed, the central processor actively uploads the measurement time and date, its own UDI, user-entered information, measurement-related process data and final results through the network interface. The network interface optimizes the wireless interface of 4G / 5G devices to ensure real-time performance, and adopts APN or TCP / IP protocol or encryption to upload to the designated port network center backend server;

[0111] The local storage unit and the background server storage information are consistent, as described in Table 2, including the test date, device UDI, user input information, measurement-related process data, and final qualitative results. Data records uploaded to the background can be downloaded or viewed by data management personnel at any time, or compared and printed, providing strong legal evidence for law enforcement. Background management personnel can also monitor at any time how many violations there are on the day, and whether the uploaded data is legal? Statistics monitor the test to illegal intersections, time periods, and illegal scopes, and conduct AI analysis. In order to provide strong reference guidance for future traffic police attendance, improve efficiency and combat crimes, and ensure the safety of the entire highway system.

[0112] When the person being tested objects to the storage of the test records, it is convenient for law enforcement to check whether the data is consistent with the local device data, and print out the curve chart of each time point of the relevant test action during the test process, providing original evidence for relevant law enforcement;

[0113] Since the data is stored locally and on the backend server, any data tampering or loss can be discovered and corrected through comparison, and the stored results are related to the data curve of the entire measurement process, so it is almost impossible to cheat and tamper with the result data. If the backend management personnel view the data during the test, they can send a command to request the local device to retransmit the record (or record the check code) for comparison to ensure the authenticity of the data. If the traffic police or users request to view or print the recorded data on site, the local device can also send a command to request the backend device to download the data record (or record the check code) for comparison to confirm the authenticity and uniqueness of the data.

[0114] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An infrared alcohol sensor traceability detection system, characterized in that: It includes a central processor for coordinating various units to synchronously complete all actions, a display unit for real-time display of infrared alcohol test gas molecule concentration C(t), blowing flow f(t), and cumulative total blowing volume V(t), a storage unit for real-time storage of information of the entire test process and measurement of the final judgment result, an infrared alcohol measurement unit for sampling independent dual optical path channels to detect the concentration of measured gas molecules, a network interface for synchronous or offline downloading of data records of the entire measurement process, and a back-end server for uploading to the traffic police through the network interface, which can be used for playback and review when the person being tested has objections or needs to provide law enforcement evidence.

2. An infrared alcohol sensor traceability detection system according to claim 1, characterized in that: The display unit displays the final curve C(t) of the alcohol gas molecule concentration value in real time during the measurement process, and monitors the entire gas molecule concentration change process.

3. The infrared alcohol sensor traceability detection system according to claim 1, characterized in that: When the background server plays back the measurement process data, it is mainly based on the test storage time axis t, and records f(t), V(t), and C(t) on this time axis. It can dynamically form a dynamic video of the blowing measurement process, and can also form a measurement process curve graph with the time axis t, plus its reference or auxiliary information as a basis for law enforcement judgment.

4. The infrared alcohol sensor traceability detection system according to claim 1, characterized in that: The data records of the background server can be uploaded to the traffic police background server and stored in the local device synchronously to prevent the possibility of illegal data tampering or cheating. If any related data is abnormal, it will be locked by the background server and form a monitoring abnormality record to remind the background management personnel to intervene and handle it.

5. An infrared alcohol sensor traceability detection system according to any one of claims 1 to 4, wherein the infrared alcohol sensor is characterized in that: The infrared alcohol measuring unit comprises an air chamber (7), one end of the air chamber (7) is provided with an infrared light-emitting tube (1), the end of the air chamber (7) away from the infrared light-emitting tube (1) is provided with a first light detector (2) and a second light detector (3), a side of the air chamber (7) adjacent to one end of the infrared light-emitting tube (1) is provided with an air inlet (4), a flow sensor (8) is provided on the air inlet (4), and a side of the air chamber (7) adjacent to one end of the first light detector (2) and the second light detector (3) is provided with an air outlet (5).

6. The infrared alcohol sensor according to claim 1, characterized in that: The outer surface of the infrared light-emitting tube (1) is nested and docked at one end of the air chamber (7); the first light detector (2) and the second light detector (3) are combined and docked at one end of the air chamber (7) away from the infrared light-emitting tube (1); the air inlet (4) is provided at one end of the air chamber (7) adjacent to the infrared light-emitting tube (1); the flow sensor (8) is docked at the air inlet (4); and the air outlet (5) is provided at one end of the air chamber (7) adjacent to the first light detector (2) and the second light detector (3).

7. The infrared alcohol sensor according to claim 1, characterized in that: The gas chamber (7) is divided into two channels. A standard gas source (6) is placed in the first channel. The standard gas source (6) on this channel is closed. The gas molecules to be measured cannot flow into the closed part. The closed part is made of transparent material and only infrared light can pass through. The second channel is used for the gas molecules to be measured to pass through. The gas enters from the air inlet (4) and exits from the air outlet (5). At the same time, there is a flow sensor (8) in the air inlet channel, which can monitor the size and direction of the air flow in the second channel in real time.

8. The infrared alcohol sensor according to claim 1, characterized in that: The infrared light emitted by the infrared light emitting tube (1) passes through two optical channels of the gas chamber (7). After the light energy on the first optical channel is absorbed by the gas molecules of the standard gas source (6), the light energy not absorbed is captured by the first detector (2); after the light energy on the second optical channel is absorbed by the gas molecules to be tested, the light energy not absorbed is captured by the second detector (3), wherein the detector can select a filter of a corresponding wavelength according to the wavelength of light required to be absorbed by different measuring gases.

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