Alcohol detection device and method based on face recognition

Abstract

The invention relates to the technical field of alcohol detectors, and discloses an alcohol detection device and method based on face recognition. The alcohol detection device based on face recognition comprises an external shell, a detection module and a foldable blowing module, the detection module is arranged in the outer shell and comprises a face recognition unit, an alcohol detection unit and a control unit, and the control unit is configured to synchronously process face recognition data and an alcohol detection result; the air blowing module comprises an air blowing part, a protection part, a communication cover and a rigid air conveying pipe. The auxiliary air blowing module is additionally arranged at the air inlet position of the detection module, the air blowing module and the face recognition unit form a double-channel verification mechanism, and through double locking of physical contact and biological characteristics, cheating behaviors such as air blowing faking and remote blowing substitution are fundamentally eradicated; and the existing sensor of the detection module can exert the maximum detection precision in a controlled environment.

Description

Technical Field

[0001] The present invention relates to the technical field of alcohol detectors, and more specifically, to an alcohol detection device and method based on face recognition. Background Art

[0002] In the field of railway transportation safety, the all-in-one alcohol detection machine, as the core link of the driving safety assurance system, plays an irreplaceable role in the behavior control of personnel in key positions.

[0003] At present, although the current mainstream alcohol detection integrated machine adopts a dual-mode verification architecture of face recognition and alcohol detection, its anti-cheating system still has certain shortcomings: the biometric verification module only completes the operator's identity binding, but does not realize the bio-behavioral verification of the blowing action; and the contact-type blowing catheter lacks the ability to perceive living characteristics, which allows violators to cheat by pre-storing clean gas in an external airbag and simulating breathing waveforms with a micro air pump, thereby bypassing the equipment's airflow dynamic monitoring mechanism. Therefore, there is an urgent need for an alcohol detection integrated machine with blowing prevention and control measures. Summary of the invention

[0004] The purpose of the present invention is to provide an alcohol detection device and method based on face recognition to solve the above-mentioned technical problems.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0006] The present invention provides an alcohol detection device based on face recognition, comprising: an external shell, a detection module and a foldable blowing module;

[0007] The detection module is disposed in the external housing, and includes a face recognition unit, an alcohol detection unit, and a control unit, wherein the control unit is configured to synchronously process face recognition data and alcohol detection results;

[0008] The air blowing module comprises: an air blowing component, a protective component, a connecting cover and a rigid air delivery pipe;

[0009] The blowing component includes a conducting pipe, a pressure switch and a blowing head adapted to the human mouth, one end of the blowing head is connected to the end of the air pipe through the conducting pipe, and the pressure switch is arranged on the blowing head for pressure triggering opening;

[0010] The connecting cover is detachably mounted on the side of the external shell and is connected to the air inlet end of the alcohol detection unit. One end of the air delivery pipe is connected to the connecting cover through a flexible pipe, and the other end extends to the outside of the external shell.

[0011] The protective component is used to isolate the air blowing head when it is stored.

[0012] As a further optimization solution of the present invention, the blowing head includes a detachably connected air collecting pipe and a flat bite short tube, and the inner side of the bite short tube is set as a rectangular groove.

[0013] As a further optimization solution of the present invention, the gas collecting pipe is a spiral tapered pipe, the inner wall of which is provided with a spiral groove with a depth of 0.2-0.25 mm, and the end is provided with an exhaust microhole connected to the end of the spiral groove.

[0014] As a further optimization scheme of the present invention, the pressure switch component is a slider structure, and the slider structure includes a sealing slider and an elastic support body. A movable groove is provided on one side of the bite short tube, and the bottom of the sealing slider slides from the outside of the bite short tube to extend into the movable groove. An air inlet is provided on one side of the sealing slider, and the elastic support body is installed between the sealing slider and the inner side of the movable groove.

[0015] As a further optimization scheme of the present invention, the conducting pipe is a rotating pipe, one end of the rotating pipe is rotatably connected to one end of the gas pipe, and the angle between the rotating pipe and the gas pipe is 100-150 degrees.

[0016] As a further optimization solution of the present invention, the protective component is a fixed protective structure, and the fixed protective structure includes a protective cover body with an open bottom, and the protective cover body is slidably installed on the side of the external shell.

[0017] As a further optimization solution of the present invention, the conducting pipe is an elastic bending pipe, which is inclined at 100-150 degrees in its natural state.

[0018] As a further optimization scheme of the present invention, the protective component is a follow-up protective structure, which includes a movable sleeve with an open bottom. The bottom of the movable sleeve is slidably connected to the outside of the gas pipe through a sliding connector, and the bottom of the movable sleeve is provided with an extension groove adapted to the bending pipe.

[0019] The alcohol detection device based on face recognition also includes a mounting base for installation in conjunction with the external shell, the mounting base includes a mounting plate, the top of the mounting plate is provided with two L-shaped protrusions, and the back of the external shell is provided with a matching card slot adapted to the protrusions.

[0020] Another aspect of the present invention discloses an alcohol detection method based on face recognition, comprising the following steps:

[0021] S1. Expand the air blowing module so that the air blowing head extends to the outside of the external shell through the air delivery pipe;

[0022] S2, the face recognition unit obtains dynamic data and starts the alcohol detection unit after verification;

[0023] S3, the pressure switch is triggered to open by the oral pressure, and the face recognition unit continues to verify the contact between the mouth and the blowing head;

[0024] S4, the gas enters the alcohol detection unit through the blowing head, the conducting pipe, the gas pipe and the connecting cover;

[0025] S5. The control unit determines whether to allow subsequent operations according to the detection result threshold.

[0026] The beneficial effects of the present invention are:

[0027] The present invention adds an auxiliary blowing module at the air inlet position of the detection module, and the blowing module adopts a combined structure of a foldable L-shaped rigid air delivery pipe and a silicone hose. When contracted, it is tightly attached to the shell and accurately positioned to the face recognition area after unfolding, thereby realizing spatial synchronization between the blowing path and the face recognition; the blowing head has a built-in pressure trigger switch, and ventilation can only be activated through tooth occlusion, ensuring that the blowing action must be completed by the human mouth; the blowing module and the face recognition unit form a dual-channel verification mechanism, and through physical contact and biometric dual locking, cheating behaviors such as false blowing and remote blowing are fundamentally eliminated, so that the existing sensor of the detection module can achieve maximum detection accuracy in a controlled environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of an alcohol detection device based on face recognition provided by the present invention;

[0029] Figure 2 It is a structural schematic diagram of an air blowing module in an alcohol detection device based on face recognition provided by the present invention;

[0030] Figure 3 It is a structural schematic diagram of an air blowing component in an alcohol detection device based on face recognition provided by the present invention;

[0031] Figure 4 It is a structural schematic diagram of an air blowing head in an alcohol detection device based on face recognition provided by the present invention;

[0032] Figure 5 It is a cross-sectional view of an air collecting pipe in an alcohol detection device based on face recognition provided by the present invention;

[0033] Figure 6 It is a cross-sectional view of a bite short tube in an alcohol detection device based on face recognition provided by the present invention;

[0034] Figure 7 This is a flow chart of using the blowing module in an alcohol detection device based on face recognition provided by the present invention;

[0035] Figure 8It is a structural schematic diagram of a follow-up protection structure in an alcohol detection device based on face recognition provided by the present invention;

[0036] Fig. 9 It is a structural schematic diagram of a follow-up protection structure in an alcohol detection device based on face recognition provided by the present invention after it is unfolded;

[0037] Fig.10 It is a schematic diagram of the structure between a mounting seat and an external shell in an alcohol detection device based on face recognition provided by the present invention.

[0038] In the figure: 1. external shell; 2. detection module; 3. blowing module; 31. blowing component; 311. conducting pipe; 312. pressure switch; 3121. sealing slider; 3122. elastic support; 3123. movable groove; 3124. air inlet; 313. blowing head; 3131. air collecting pipe; 3132. bite short pipe; 3133. spiral groove; 3134. exhaust micropore; 32. protective component; 321. protective cover body; 322. movable sleeve; 323. extension slot; 324. sliding connector; 33. connecting cover; 34. air supply pipe; 4. mounting seat; 41. mounting plate; 42. protrusion; 43. matching slot. DETAILED DESCRIPTION

[0039] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0040] Embodiment 1

[0041] Please refer to Figure 1, an alcohol detection device based on face recognition, comprising: an external shell 1, a detection module 2 and a foldable blowing module 3. Among them, the shell of the external shell 1 can be made of ABS+PC alloy, and an equipment cabin is arranged inside, and a capacitive touch screen is integrated on the front of the external shell 1. The detection module 2 is installed in the equipment cabin inside the external shell 1. The detection module 2 includes a face recognition unit, an alcohol detection unit and a control unit. The face recognition unit adopts a 3D structured light module, a built-in liveness detection algorithm, and can capture 48 facial feature points. The dynamic recognition angle range is ±30°, and the alcohol detection unit can include an alcohol sensor, a pressure sensor, a sampling air pump and other structural components. Among them, the alcohol sensor can use a 16mm electrochemical alcohol sensor with a detection range of 0-2mg / L and a detection error of ±0.02mg / L. The control unit mainly consists of an integrated circuit board and a processor. The processor can use an ARM-M4 main control chip, integrate the MODBUS communication protocol, and coordinate the logical judgment of face data and alcohol concentration in real time. Since the detection module 2 belongs to the prior art, its implementation process and principle are not described in detail here.

[0042] Please refer to Figures 1 to 3 as well as Figure 7 The air blowing module 3 includes an air blowing component 31, a protective component 32, a connecting cover 33 and a rigid air supply pipe 34. The connecting cover 33 is detachably mounted on one side of the external housing 1, and the air inlet end of the alcohol detection unit is connected to one end of the connecting cover 33. The air supply pipe 34 is arranged on the outside of the external housing 1. One end of the air supply pipe 34 is connected to one side of the connecting cover 33 through a flexible pipe. The air supply pipe 34 is L-shaped. When it is in a contracted state, it is placed on the front of the external housing 1. The flexible pipe can be a silicone hose or a corrugated pipe, which can adapt to the folding and contraction action of the air supply pipe 34. The air blowing component 31 includes a conducting pipe 311, a pressure switch 312 and an air blowing head 313 adapted to the human mouth. One end of the air blowing head 313 is connected to the end of the air supply pipe 34 through the conducting pipe 311. The pressure switch 312 is arranged on the air blowing head 313. After the air blowing head 313 is subjected to pressure outside, the air blowing head 313 is adjusted to an open state through the pressure switch 312. The protective component 32 is used to isolate the blowing head 313 in the retracted state from the external environment.

[0043] It should be noted that when the above alcohol detection device is in use, the staff first unfolds the folded air outlet module so that the air blowing module 3 is on the front of the external shell 1, just in the identifiable area of ​​the face recognition unit. Then the staff uses a disposable film sleeve adapted to the air blowing head 313 to cover the air blowing head 313, and then holds the end of the air blowing head 313 with the mouth and bites the position of the pressure switch 312 with the teeth. At this time, the pressure switch 312 detects the pressure and adjusts the air blowing head 313 to the open state. At this time, the face recognition unit captures the staff's mouth holding the air blowing module 313 in real time. The staff member then starts to blow air continuously into the blowing head 313 according to the prompt on the touch screen, and stops blowing after hearing the prompt to stop blowing. The staff member separates the mouth from the blowing head 313 and removes the disposable film cover from the blowing head 313. The gas enters from the blowing head 313, passes through the gas pipe 34 and the connecting cover 33, and finally enters the alcohol detection unit. The alcohol concentration of the incoming gas is detected by the alcohol detection unit, and then the alcohol detection result is recorded and displayed on the display screen at the same time.

[0044] In this way, an auxiliary blowing module 3 is added at the position of the air inlet 3124 of the detection module 2, and the blowing module 3 adopts a foldable L-shaped rigid air delivery pipe 34 and a silicone hose combination structure, which is close to the shell when contracted and accurately positioned to the face recognition area after unfolding, so as to achieve spatial synchronization between the blowing path and facial recognition; the blowing head 313 has a built-in pressure trigger switch, which requires teeth to bite to activate ventilation, ensuring that the blowing action must be completed by the human mouth; the protective component 32 is isolated from external pollution when in the storage state, and is quickly connected to the alcohol detection unit through the connecting cover 33 when unfolded. The blowing module 3 and the face recognition unit form a dual-channel verification mechanism, which fundamentally eliminates cheating behaviors such as false blowing and remote blowing by physical contact and biological characteristics, so that the existing sensor of the detection module 2 can achieve the maximum detection accuracy in a controlled environment.

[0045] Please refer to Figures 3 to 5 The air blowing head 313 includes an air collecting pipe 3131 and a flat occlusal short pipe 3132, and the inner groove of the occlusal short pipe 3132 is a rectangular groove, and the occlusal short pipe 3132 and one end of the air collecting pipe 3131 can be detachably installed. The air collecting pipe 3131 is a spiral tapered pipe, and a spiral groove 3133 with a depth of 0.2-0.25mm is provided on the inner wall of the spiral tapered pipe, and an exhaust micro hole 3134 connected to the end of the spiral groove 3133 is provided at one end of the spiral tapered pipe away from the occlusal short pipe 3132.

[0046] It should be noted that when the above-mentioned blowing head 313 is in use, after the exhaled air flow enters the spiral tapered tube, the exhaled air is accelerated due to the contraction of the tube diameter, and is guided by the spiral groove 3133 on the inner wall to form a high-speed vortex. The liquid water mist is thrown to the tube wall under the action of centrifugal force and moves toward the end along the spiral groove 3133, and is finally discharged through the exhaust micropores 3134 distributed in a ring at the bottom. In this way, the exhaled air is automatically centrifuged and dehydrated, and the dehydrated dry gas continues to flow to the sensor, avoiding the problem of the sensor's detection accuracy being affected by excessive water content in the gas during continuous detection. At the same time, the high-speed airflow achieves self-cleaning of the tube wall through the micro-turbulence of the spiral groove 3133, ensuring long-term stable operation.

[0047] Please refer to Figure 3 , Figure 4 and Figure 6 The pressure switch component 312 is a slider structure, which includes a sealing slider 3121 and an elastic support 3122 body. A movable groove 3123 is provided on one side of the bite short tube 3132. The bottom of the sealing slider 3121 slides from the outside of the bite short tube 3132 to the inside of the movable groove 3123. An air inlet 3124 is provided on one side of the sealing slider 3121. The elastic support 3122 body is installed between the sealing slider 3121 and the inner side of the movable groove 3123. The elastic support 3122 body can be a spring, and there are two of them, which are symmetrically distributed on both sides of the sealing slider 3121.

[0048] It should be noted that when the above-mentioned slider structure is in use, the double design of bite trigger and mechanical linkage is used to achieve precise control of the blowing pipeline: in the initial state, the symmetrical spring hides the air inlet 3124 at the top of the sealing slider 3121 in the wall of the bite short tube 3132, and the bottom of the sealing slider 3121 is used to achieve physical blocking; when the upper teeth apply bite pressure, the sealing slider 3121 is pressed down along the movable groove 3123 to a value greater than the critical displacement (defined by the double spring compression stroke), so that the hidden air inlet 3124 is aligned and connected with the pipeline. This design converts physiological behavior (tooth bite force) into mechanical action, which not only ensures that non-living objects cannot trigger blowing through tools (such as finger pressing), but also maintains the stability of the slider movement through the symmetrical layout of the double springs to prevent unilateral jamming; at the same time, the full-stroke mechanical locking feature of the slider fundamentally prevents accidental closure or leakage of the valve during blowing, ensures the continuity and integrity of the detected airflow, and finally forms an irreversible and forged blowing start verification mechanism.

[0049] Please refer to Figure 1 and Figure 2The conducting pipe 311 is a rotating pipe, one end of which is rotatably connected to one end of the air delivery pipe 34, and the angle between the rotating pipe and the air delivery pipe 34 is 100-150 degrees. The rotating pipe in an inclined state can facilitate the mouth to bite the blowing head 313. The protective component 32 is a fixed protective structure, which includes a protective cover body 321 with an open bottom. The protective cover body 321 is slidably mounted on the side of the external shell 1, and a storage cavity for placing a disposable protective film sleeve can be set on the protective cover body 321.

[0050] It should be noted that after the blowing is completed, the blowing module 3 needs to be folded and retracted, and the air supply pipe 34 is rotated to make it approach the front of the external shell 1 and finally fit it, and then the rotating tube is rotated to make it fit the side of the external shell 1, and then the protective cover body 321 is pulled downward to make the protective cover body 321 completely cover the outside of the blowing component 31, so as to prevent external dust from contaminating the blowing component 31 and ensure the hygiene and safety of the blowing component 31 in daily use.

[0051] Please refer to Fig.10 The alcohol detection device based on face recognition also includes a mounting base 4 for use in conjunction with the external shell 1. The mounting base 4 includes a mounting plate 41. Two L-shaped protrusions 42 are provided on the top of the mounting plate 41. A matching card slot 43 adapted to the protrusion 42 is provided on the back of the external shell 1.

[0052] Embodiment 2

[0053] Please refer to Figure 8 and Fig. 9 The present invention also provides an embodiment of a protective component 32, which is different from the first embodiment in that: the conducting pipe 311 is an elastic bending pipe, the two ends of the bending pipe are respectively fixedly connected with the gas collecting pipe 3131 and the gas delivery pipe 34, and the bending pipe is inclined at 100-150 degrees when not compressed. The protective component 32 is a follow-up protective structure, which includes a movable sleeve 322 with an open bottom, the bottom of the movable sleeve 322 is slidably connected to the outer side of the gas delivery pipe 34 through a sliding connector 324, and the bottom of the movable sleeve 322 is provided with an extension slot 323 adapted to the bending pipe.

[0054] It should be noted that when the above-mentioned protective component 32 is in use, the movable sleeve 322 is pulled upward to make it start to slide upward along the air pipe 34, and the bending tube synchronously rebounds upward and resets under the action of its own elastic force until the movable sleeve 322 moves up to the maximum displacement, which just makes the bending tube return to its initial shape. At this time, the air outlet component is unfolded, and the outer side of the bending tube is just engaged with the extension groove 323, so that the blowing head 313 can be blown. After the blowing is completed, the air pipe 34 is rotated to fit with the external shell 1, and the blowing component 31 can be squeezed into the movable sleeve 322 by pulling the movable sleeve 322 downward. The blowing component 31 is protected by the movable sleeve 322 and isolated from the external environment.

[0055] Embodiment 3

[0056] In addition, the present invention also provides an alcohol detection method based on face recognition, which is applicable to the above-mentioned alcohol detection device, and the detection method includes:

[0057] S1, unfolding the blowing module 3 in the folded and contracted state, so that the blowing head 313 extends to the outside of the external shell 1 through the rigid air delivery pipe 34;

[0058] S2, acquiring dynamic face data through the face recognition unit in the detection module 2, and if face information meeting the preset conditions is recognized, the control unit activates the alcohol detection unit;

[0059] S3, the user applies pressure to the air blowing head 313, triggering the pressure switch 312 to open the air blowing head 313, and at the same time, the face recognition unit continues to verify the contact state between the user's mouth and the air blowing head 313;

[0060] S4, when the user blows, the gas flows through the blowing head 313, the conducting pipe 311, the gas pipe 34 and the connecting cover 33 in sequence, and enters the alcohol detection unit for alcohol content detection;

[0061] S5. If the alcohol content measured by the alcohol detection unit exceeds the threshold, the control unit prohibits subsequent operations; if it does not exceed the threshold, the control unit allows subsequent operations.

[0062] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. An alcohol detection device based on face recognition, characterized in that: include: An external shell (1), a detection module (2) and a foldable blowing module (3); The detection module (2) is arranged in the external housing (1), and comprises a face recognition unit, an alcohol detection unit and a control unit, wherein the control unit is configured to synchronously process face recognition data and alcohol detection results; The air blowing module (3) comprises: an air blowing component (31), a protective component (32), a connecting cover (33) and a rigid air delivery pipe (34); The air blowing component (31) comprises a conducting pipe (311), a pressure switch (312), and an air blowing head (313) adapted to the human mouth; one end of the air blowing head (313) is connected to the end of the air delivery pipe (34) via the conducting pipe (311); the pressure switch (312) is arranged on the air blowing head (313) and is used for pressure-triggered opening; The connecting cover (33) is detachably mounted on the side of the external shell (1) and is connected to the air inlet end of the alcohol detection unit; one end of the air delivery pipe (34) is connected to the connecting cover (33) via a flexible pipe, and the other end extends to the outside of the external shell (1); The protective component (32) is used to isolate the air blowing head (313) when stored.

2. The alcohol detection device based on face recognition according to claim 1, characterized in that: The air blowing head (313) comprises a detachably connected air collecting pipe (3131) and a flat occlusal short pipe (3132), and the inner side of the occlusal short pipe (3132) is configured as a rectangular groove.

3. The alcohol detection device based on face recognition according to claim 2 is characterized in that: The gas collecting pipe (3131) is a spiral tapered pipe, the inner wall of which is provided with a spiral groove (3133) with a depth of 0.2-0.25 mm, and the end of which is provided with an exhaust microhole (3134) connected to the end of the spiral groove (3133).

4. The alcohol detection device based on face recognition according to claim 3 is characterized in that: The pressure switch element (312) is a slider structure, which includes a sealing slider (3121) and an elastic support (3122) body. A movable groove (3123) is provided on one side of the bite short tube (3132). The bottom of the sealing slider (3121) slides and extends from the outside of the bite short tube (3132) into the movable groove (3123). An air inlet (3124) is provided on one side of the sealing slider (3121). The elastic support (3122) body is installed between the sealing slider (3121) and the inner side of the movable groove (3123).

5. The alcohol detection device based on face recognition according to claim 4 is characterized in that: The conducting pipe member (311) is a rotating pipe, one end of which is rotatably connected to one end of the gas pipe (34), and the angle between the rotating pipe and the gas pipe (34) is 100-150 degrees.

6. The alcohol detection device based on face recognition according to claim 5, characterized in that: The protective component (32) is a fixed protective structure, comprising a protective cover body (321) with an open bottom, wherein the protective cover body (321) is slidably mounted on the side of the external shell (1).

7. The alcohol detection device based on face recognition according to claim 4 is characterized in that: The conducting pipe (311) is an elastic bending pipe, which is inclined at 100-150 degrees in its natural state.

8. The alcohol detection device based on face recognition according to claim 7, characterized in that: The protective component (32) is a follow-up protective structure, comprising a movable sleeve (322) with an open bottom, the bottom of the movable sleeve (322) being slidably connected to the outside of the gas pipe (34) via a sliding connection (324), and the bottom of the movable sleeve (322) being provided with an extension notch (323) adapted to the bending pipe.

9. An alcohol detection device based on face recognition according to any one of claims 1 to 8, characterized in that: It also includes a mounting seat (4) for mounting in cooperation with the external shell (1), the mounting seat (4) including a mounting plate (41), the top of the mounting plate (41) being provided with two L-shaped protrusions (42), and the back of the external shell (1) being provided with matching slots (43) adapted to the protrusions (42).

10. An alcohol detection method based on face recognition, applied to an alcohol detection device based on face recognition as claimed in any one of claims 1 to 8, characterized in that: The steps include: S1, unfolding the air blowing module (3) so that the air blowing head (313) extends to the outside of the external housing (1) through the air delivery pipe (34); S2, the face recognition unit obtains dynamic data and starts the alcohol detection unit after verification; S3, the pressure switch element (312) is triggered to open by the oral pressure, and at the same time, the face recognition unit continues to verify the contact between the mouth and the blowing head (313); S4, the gas enters the alcohol detection unit through the air blowing head (313), the conducting pipe (311), the gas delivery pipe (34) and the connecting cover (33); S5. The control unit determines whether to allow subsequent operations according to the detection result threshold.

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