Alcohol detection system

Abstract

The utility model relates to the field of photoelectric detection, in particular to an alcohol detection system which comprises a laser transmitter, a collimation module, a light collection module and a laser receiver. The laser emitter is configured to emit laser to the laser receiver and form an emergent light path, and the collimation module and the light collection module are sequentially arranged in the emergent direction of the emergent light path; wherein the collimating module is used for collimating and emitting the diverged laser, the light collecting module is used for converging and emitting the collimated laser to the laser receiver, and a space for a to-be-measured target to pass through is arranged between the collimating module and the light collecting module. According to the invention, the collimation module collimates and emits the divergent laser to prevent the laser from diverging towards the area outside the target to be measured, and the light collection module gathers and emits the collimated laser towards the laser receiver, so that the laser beam quality obtained by the laser receiver is good, and the actually measured measurement signal is good. And the accuracy of a detection result for detecting whether alcohol molecules exist in the space is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photoelectric detection, in particular to an alcohol detection system. BACKGROUND

[0002] With the gradual improvement of social living standards, the number of motor vehicles is increasing, and people's life and property safety are seriously harmed by drunk driving.

[0003] For the detection and investigation of drunk driving behavior, the related technology will use an alcohol detector to shoot laser at a vehicle to be measured, and judge whether the driver is drunk by measuring the reflected light absorption spectrum. However, due to the divergence of the reflected light, the actual measured measurement signal is very small, and the accuracy of the detection result is low. CONTENT OF THE UTILITY MODEL

[0004] The present application aims to at least solve the technical problem in the prior art that the alcohol detector judges whether the driver is drunk by measuring the reflected light absorption spectrum, the divergence of the reflected light makes the actual measured measurement signal very small, and the accuracy of the detection result is low. To this end, the present application provides an alcohol detection system.

[0005] The present application provides an alcohol detection system, comprising: a laser emitter, a collimation module, a light collection module, and a laser receiver;

[0006] The laser emitter is configured to emit laser to the laser receiver and form an outgoing light path, and the collimation module and the light collection module are sequentially arranged along the outgoing direction of the outgoing light path.

[0007] The collimation module is used to collimate the divergent laser to emit, and the light collection module is used to converge the collimated laser to emit to the laser receiver, and a space for the to-be-measured target to pass through is arranged between the collimation module and the light collection module.

[0008] By adopting the above technical solution, the collimation module is used to collimate the divergent laser to emit, so as to avoid the divergence of the laser towards the area outside the to-be-measured target, and the light collection module is used to converge the collimated laser to emit to the laser receiver, so that the laser receiver obtains a laser beam with good quality, the actual measured measurement signal is good, and the detection result of whether there is an alcohol molecule in the space is accurate.

[0009] According to an embodiment of the present application, the alcohol detection system further comprises a controller;

[0010] The controller is connected with the laser emitter and the laser receiver respectively, the laser receiver is configured to convert the received laser into an electrical signal, the controller calculates the intensity of the laser according to the electrical signal, and obtains the alcohol concentration of the to-be-measured target according to the corresponding relationship between the intensity of the laser and the alcohol concentration.

[0011] According to one embodiment of the present application, the alcohol detection system further comprises: a ranging radar;

[0012] The ranging radar is in communication connection with the controller, and is configured to obtain the distance of the target to be detected.

[0013] According to one embodiment of the present application, the alcohol detection system further comprises: a storage unit;

[0014] The storage unit is connected with the controller, and the storage unit stores a warning threshold of alcohol concentration, and the controller compares the alcohol concentration of the target to be detected with the warning threshold of alcohol concentration to determine whether the alcohol concentration of the target to be detected exceeds the warning threshold of alcohol concentration.

[0015] According to one embodiment of the present application, the alcohol detection system further comprises: a central control console;

[0016] The central control console is in communication connection with the controller, and the central control console is configured to receive the alcohol concentration information of the target to be detected.

[0017] According to one embodiment of the present application, the alcohol detection system further comprises: a camera;

[0018] The camera is in communication connection with the controller, and the camera is configured to obtain the feature information of the target to be detected when the laser emitter emits the laser.

[0019] According to one embodiment of the present application, the alcohol detection system further comprises: a signal amplification unit;

[0020] The output end of the laser receiver is connected with the signal amplification unit, and the signal amplification unit is connected with the controller.

[0021] According to one embodiment of the present application, the controller of the alcohol detection system is an FPGA chip.

[0022] According to one embodiment of the present application, the collimating module is a collimating lens, and the light collecting module is a condenser lens.

[0023] According to one embodiment of the present application, the collimating module and the light collecting module each comprise three convex lenses arranged in parallel and at intervals.

[0024] In summary, the present application comprises at least one of the following beneficial technical effects: the collimation module is used to collimate the divergent laser light to avoid the laser light from diverging towards the area other than the target to be measured, and the light collection module is used to converge the collimated laser light to the laser receiver, so that the laser beam quality obtained by the laser receiver is better, the measured measurement signal is better, and the detection result of whether there is alcohol molecule in the space is accurate. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic diagram of an alcohol detection system provided by an embodiment of the present application;

[0026] Figure 2 is a structural schematic diagram of a laser emitter and a collimation module provided by an embodiment of the present application;

[0027] Figure 3 is a structural schematic diagram of a laser receiver and a light collection module provided by an embodiment of the present application;

[0028] Figure 4 is a structural schematic diagram of an alcohol detection system provided by an embodiment of the present application;

[0029] Figure 5 is a structural schematic diagram of an alcohol detection system provided by an embodiment of the present application.

[0030] REFERENCE SIGNS

[0031] 1, laser emitter; 2, collimation module; 3, light collection module; 4, laser receiver; 5, controller; 6, signal amplification unit; 7, ranging radar; 8, camera; 9, central control console; 10, electronic device; a, target to be measured. DETAILED DESCRIPTION

[0032] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, in which the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0033] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, in which the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application. Figures 1-5 An alcohol detection system according to an embodiment of the present application is described below.

[0034] As shown in Figures 1-3 , the alcohol detection system comprises a laser emitter 1, a collimation module 2, a light collection module 3, and a laser receiver 4.

[0035] The laser emitter 1 is configured to emit laser light to the laser receiver 4 and form an outgoing light path, and the collimation module 2 and the light collection module 3 are sequentially arranged along the outgoing direction of the outgoing light path.

[0036] It should be noted that the laser receiver 4 includes but is not limited to an indium gallium arsenide APD detector, and the minimum detectable power is less than or equal to 1 nanowatt.

[0037] The collimation module 2 is used for collimating the divergent laser to emit, and the light collection module 3 is used for converging the collimated laser to emit to the laser receiver 4. The space for the to-be-detected target a to pass through is arranged between the collimation module 2 and the light collection module 3.

[0038] The to-be-detected target a includes but is not limited to a vehicle or a pedestrian.

[0039] Taking the vehicle as a drunk driving vehicle as an example, when the drunk driving vehicle passes through the space between the collimation module 2 and the light collection module 3, alcohol molecules in the drunk driving vehicle will absorb part of the laser energy of a certain wavelength, and other wavelengths of laser will continue to propagate along the light path until being received by the laser receiver 4. According to the waveform change of the laser energy detected by the laser receiver 4, whether the alcohol molecules pass through the space can be determined.

[0040] The related art will configure the laser emitter 1 and the laser receiver 4 in an alcohol detector together. The reflected light of the space is received by the laser receiver 4, and whether the alcohol molecules pass through the space is determined according to the waveform change of the reflected light energy.

[0041] Because the reflected light will diverge in the space, the actual measured measurement signal is small, and the detection result of whether the alcohol molecules pass through the space is low in accuracy.

[0042] If the alcohol detector is held close to the vehicle, although the detection result can be improved in accuracy, the vehicle needs to be parked, which will affect the traffic and reduce the detection efficiency.

[0043] In the above embodiment of the present application, when the vehicle passes through the space between the collimation module 2 and the light collection module 3, the window of the vehicle is on the light path formed by the laser emitter 1. According to the waveform change of the laser energy detected by the laser receiver 4, whether the alcohol molecules pass through the vehicle can be determined. The above process does not need the vehicle to be parked, which can improve the detection efficiency.

[0044] In addition, the collimation module 2 is used for collimating the divergent laser to emit, so as to avoid the laser from diverging to the area outside the window of the vehicle. The light collection module 3 is used for converging the collimated laser to emit to the laser receiver 4, so that the laser beam quality obtained by the laser receiver 4 is good, the actual measured measurement signal is good, and the detection result of whether the alcohol molecules pass through the space is high in accuracy.

[0045] In summary, the alcohol detection system provided by the embodiments of the present application, the collimation module 2 is used for collimating the divergent laser to avoid the laser diverging towards the area other than the target a, and the light collecting module 3 is used for converging the collimated laser to the laser receiver 4, so that the laser receiver 4 obtains a laser beam with good quality, and the measured signal is good, and the detection result of whether there is alcohol molecule in the space is accurate.

[0046] It should be noted that the collimation module 2 can be a collimating lens, and the light collecting module 3 can be a converging lens.

[0047] It should be noted that the collimation module 2 can be a collimating lens, and the light collecting module 3 can be a converging lens.

[0048] As shown in Figure 2 and Figure 3 , in actual execution, the collimation module 2 and the light collecting module 3 can each include three convex lenses arranged in parallel and at intervals.

[0049] As shown in Figure 4 and Figure 5 , in some embodiments, the alcohol detection system further includes a controller 5.

[0050] The controller 5 is connected to the laser emitter 1 and the laser receiver 4, respectively, and the laser receiver 4 is configured to convert the received laser beam into an electrical signal, the controller 5 calculates the intensity of the laser beam according to the electrical signal, and obtains the alcohol concentration of the target a according to the corresponding relationship between the intensity of the laser beam and the alcohol concentration.

[0051] As shown in Figure 4 and Figure 5 , in some embodiments, the alcohol detection system further includes a signal amplification unit 6.

[0052] The output end of the laser receiver 4 is connected to the signal amplification unit 6, and the signal amplification unit 6 is connected to the controller 5. The signal amplification unit 6 can amplify the electrical signal output by the laser receiver 4 twice in sequence.

[0053] As shown in Figure 4 and Figure 5 , in some embodiments, the alcohol detection system further includes a ranging radar 7.

[0054] The ranging radar 7 is in communication connection with the controller 5, and is used for obtaining the distance of the target a, and the controller 5 judges the distance of the target a and controls the laser emitter 1 to emit laser.

[0055] As shown in Figure 4 and Figure 5As shown, in some embodiments, the alcohol detection system further includes a storage unit.

[0056] The storage unit is connected to the controller 5. The storage unit stores the warning threshold of alcohol concentration. The controller 5 compares the alcohol concentration of the target a to be tested with the warning threshold of alcohol concentration to determine whether the alcohol concentration of the target a to be tested exceeds the warning threshold of alcohol concentration.

[0057] like Figure 5 As shown, in some embodiments, the alcohol detection system further includes a camera 8.

[0058] Camera 8 is connected to controller 5 and is configured to acquire feature information of target a when laser emitter 1 emits a probe laser.

[0059] This feature information includes, but is not limited to, the appearance features of the target a and the license plate information of the target a.

[0060] like Figure 4 and Figure 5 As shown, in some embodiments, the alcohol detection system also includes a central control console 9.

[0061] The central control console 9 is communicatively connected to the controller 5. The central control console 9 is used to receive the alcohol concentration information of the target a. Of course, the central control console 9 can also receive the appearance feature information of the target a captured by the camera 8. If the target a is a vehicle, the central control console 9 can also receive the license plate information of the target a captured by the camera 8.

[0062] like Figure 5 Figure 4 Figure 5 Figure 5 As shown, in some embodiments, the alcohol detection system further includes an electronic device 10.

[0063] The central control console 9 is connected to an electronic device 10, which is used to receive the alcohol concentration information of the target a, the appearance features of the target a captured by the camera 8, and the license plate information of the target a captured by the camera 8. The electronic device 10 includes, but is not limited to, a mobile phone.

[0064] The embodiments of this application will be described in detail below from different implementation perspectives.

[0065] The alcohol detection system includes: a laser emitter 1, a collimation module 2, a light-collecting module 3, a laser receiver 4, a controller 5, a ranging radar 7, a storage unit, a camera 8, and a central control console 9.

[0066] Laser emitter 1 and collimation module 2, along with light collection module 3 and laser receiver 4, can be mounted on crossbars on both sides of the road, which is a space for vehicles to pass through.

[0067] The ranging radar 7 is used to obtain the radar signal of the target a during operation, and the controller 5 judges the distance between the target vehicle and the road according to the radar signal, and further judges whether the vehicle enters the road.

[0068] If the vehicle enters the road, the laser emitter 1 emits laser to the laser receiver 4, and forms an outgoing light path, the vehicle window will be in the outgoing light path formed by the laser emitter 1, according to the waveform change of the laser energy detected by the laser receiver 4, it can be judged whether there are alcohol molecules in the vehicle, and the alcohol concentration of the target a is obtained according to the corresponding relationship between the laser intensity and the alcohol concentration.

[0069] The controller 5 compares the alcohol concentration in the vehicle with the warning threshold of alcohol concentration, and determines whether the alcohol concentration of the vehicle exceeds the warning threshold of alcohol concentration.

[0070] If the alcohol concentration of the vehicle exceeds the warning threshold of alcohol concentration, the central control console 9 receives the alcohol concentration information of the target a, receives the appearance feature information of the target a shot by the camera 8, and receives the license plate information of the target a shot by the camera 8.

[0071] In the embodiment, the controller 5 can use a high-speed FPGA controller 5 to improve the test speed.

[0072] The laser emitter 1 and the collimation module 2, and the light collection module 3 and the laser receiver 4 can be installed on the crossbar on both sides of the road to realize fixed-point testing, which can ensure the test accuracy and precision.

[0073] The central control console 9 receives the alcohol concentration information of the target a, receives the appearance feature of the target a shot by the camera 8, and receives the license plate information of the target a shot by the camera 8, which greatly improves the inspection and monitoring efficiency.

[0074] The above are the preferred embodiments of the present application, not limited to the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. An alcohol detection system, characterized by, The application relates to a laser alcohol concentration detection device. The device comprises a laser emitter (1), a collimation module (2), a light collection module (3) and a laser receiver (4). The laser emitter (1) is configured to emit a detection laser to the laser receiver (4) and form an outgoing light path, and the collimation module (2) and the light collection module (3) are sequentially arranged along the outgoing direction of the outgoing light path. The collimation module (2) is used for collimating the divergent detection laser, the light collection module (3) is used for converging the collimated detection laser to the laser receiver (4), and a space for the target (a) to pass through is arranged between the collimation module (2) and the light collection module (3).

2. The alcohol detection system of claim 1, wherein, The device further comprises a controller (5). The controller (5) is connected with the laser emitter (1) and the laser receiver (4), the laser receiver (4) is configured to convert the received laser into an electric signal, the controller (5) calculates the intensity of the detection laser according to the electric signal, and the alcohol concentration of the target (a) is obtained according to the corresponding relationship between the intensity of the detection laser and the alcohol concentration. The device further comprises a storage unit.

3. The alcohol detection system of claim 2, wherein, The storage unit is connected with the controller (5), the storage unit stores an alarm threshold of the alcohol concentration, and the controller (5) compares the alcohol concentration of the target (a) with the alarm threshold of the alcohol concentration to determine whether the alcohol concentration of the target (a) exceeds the alarm threshold of the alcohol concentration. The device further comprises a central control console (9).

4. The alcohol detection system of claim 2, wherein, The central control console (9) is in communication connection with the controller (5), and the central control console (9) is used for receiving the alcohol concentration information of the target (a). The device further comprises a ranging radar (7). The ranging radar (7) is in communication connection with the controller (5) and is used for acquiring the distance of the target (a), and the controller (5) judges the distance of the target (a) and controls the laser emitter (1) to emit the detection laser.

5. The alcohol detection system of claim 4, wherein, The device further comprises a camera (8). The camera (8) is in communication connection with the controller (5), and the camera (8) is configured to acquire the feature information of the target (a) when the laser emitter (1) emits the detection laser. The device further comprises a signal amplification unit (6).

6. The alcohol detection system of claim 5, wherein, An output end of the laser receiver (4) is connected with the signal amplification unit (6), and the signal amplification unit (6) is connected with the controller (5). The controller (5) is an FPGA chip. The collimation module (2) is a collimation lens, and the light collection module (3) is a light collection lens.

7. The alcohol detection system of claim 2, wherein, The collimation module (2) and the light collection module (3) each comprise three convex lenses which are arranged in parallel and at intervals. ​ ​ 8. The alcohol detection system of claim 2, wherein, ​ 9. The alcohol detection system according to any one of claims 1-8, wherein, ​ 10. The alcohol detection system of claim 9, wherein, ​

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