An alcohol detection device and method based on face recognition

Abstract

The present 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 includes: an external housing, a detection module, and a foldable blowing module; the detection module is disposed inside the external housing, and includes 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 alcohol detection results; the blowing module includes: a blowing component, a protection component, a connecting cover, and a rigid air duct. By adding an auxiliary blowing module at the air inlet position of the detection module, the present invention forms a dual-channel verification mechanism with the face recognition unit, and through dual locking of physical contact and biometric features, cheating behaviors such as blowing fakes and remote proxy blowing are fundamentally eliminated, enabling the existing sensors of the detection module to exert the maximum detection accuracy 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 integrated alcohol detector, as the core link of the train operation safety guarantee system, plays an irreplaceable role in the behavior control of key post personnel.

[0003] Currently, although the current mainstream integrated alcohol detectors adopt a dual-mode verification architecture of face recognition and alcohol detection, their anti-cheating systems still have certain deficiencies: the biometric verification module only completes the binding of the operator's identity, but does not implement the biobehavioral verification of the blowing action; and the contact blowing catheter lacks the ability to sense the living body characteristics, resulting in that violators can bypass the air flow dynamic monitoring mechanism of the device through cheating means such as pre-storing clean gas in an external airbag and simulating the breathing waveform with a micro air pump. Therefore, there is an urgent need for an integrated alcohol detector 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 existing technical problems through the following technical solutions:

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

[0007] The detection module is arranged inside the external housing, and includes a face recognition unit, an alcohol detection unit, and a control unit, and the control unit is configured to synchronously process the face recognition data and the alcohol detection result;

[0008] The blowing module includes: a blowing component, a protection component, a connecting cover, and a rigid air delivery pipe;

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

[0010] The connecting cover is detachably installed on the side of the external housing 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 housing;

[0011] The protection component is used to isolate the blowing head during storage.

[0012] As a further optimized solution of the present invention, the blowing head includes a gas collecting pipe and a flat bite short pipe that are detachably connected, and a rectangular groove is provided inside the bite short pipe.

[0013] As a further optimized solution of the present invention, the gas collecting pipe is a spiral tapered pipe, and spiral grooves with a depth of 0.2 - 0.25 mm are provided on its inner wall, and exhaust micropores communicating with the ends of the spiral grooves are provided at the end.

[0014] As a further optimized solution of the present invention, the pressure switch member is a slider structure, and the slider structure includes a sealing slider and an elastic support body. An activity groove is provided on one side of the bite short pipe. The bottom of the sealing slider slides from the outside of the bite short pipe and extends into the activity 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 activity groove.

[0015] As a further optimized solution of the present invention, the conducting pipe fitting is a rotating pipe. One end of the rotating pipe is rotatably connected to one end of the air delivery pipe, and the included angle between the rotating pipe and the air delivery pipe is 100 - 150 degrees.

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

[0017] As a further optimized solution of the present invention, the conducting pipe fitting is an elastic bent pipe, and its natural state is inclined at 100 - 150 degrees.

[0018] As a further optimized solution of the present invention, the protection component is a following protection structure, and the following protection structure includes a movable sleeve with an open bottom. The bottom of the movable sleeve is slidably connected to the outside of the air delivery pipe through a sliding connection member, and an extension notch adapted to the bent pipe is provided at the bottom of the movable sleeve.

[0019] The alcohol detection device based on face recognition further includes a mounting base for cooperative installation with the external housing. The mounting base includes a mounting plate, and two L-shaped protrusions are provided on the top of the mounting plate. A cooperative card slot adapted to the protrusions is provided on the back of the external housing.

[0020] On the other hand, the present invention discloses an alcohol detection method based on face recognition, including the following operation steps:

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

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

[0023] S3. The pressure switch is triggered and turned on by the oral cavity pressure. At the same time, the face recognition unit continuously verifies 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 fitting, the air delivery 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 as follows:

[0027] In the present invention, an auxiliary blowing module is added at the air inlet position of the detection module. The blowing module adopts a combined structure of a folding L-shaped rigid air delivery pipe and a silica gel hose. When contracted, it clings to the housing, and when unfolded, it is accurately positioned to the face recognition area, realizing the spatial synchronization of the blowing path and face recognition. The blowing head is internally provided with a pressure trigger switch, and ventilation can only be activated by biting with teeth, 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 dual locking of physical contact and biometric features, cheating behaviors such as blowing faking and remote proxy blowing are fundamentally eliminated, enabling the existing sensors of the detection module to exert the maximum detection accuracy in a controlled environment. Description of the Drawings

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

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

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

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

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

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

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

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

[0036] Figure 9 It is a schematic structural diagram of the unfolded following protection structure in an alcohol detection device based on face recognition provided by the present invention;

[0037] Figure 10 It is a schematic structural diagram between the mounting base and the external housing in an alcohol detection device based on face recognition provided by the present invention.

[0038] In the figure: 1. External housing; 2. Detection module; 3. Blowing module; 31. Blowing component; 311. Conducting pipe fitting; 312. Pressure switch component; 3121. Sealing slider; 3122. Elastic support body; 3123. Activity groove; 3124. Air inlet; 313. Blowing head; 3131. Gas collecting pipe; 3132. Biting short pipe; 3133. Spiral groove; 3134. Exhaust micropores; 32. Protection component; 321. Protective cover body; 322. Movable sleeve; 323. Extension notch; 324. Sliding connecting piece; 33. Connecting cover; 34. Air delivery pipe; 4. Mounting base; 41. Mounting plate; 42. Protrusion; 43. Matching card slot. Detailed implementation manners

[0039] Now, the subject matter described herein will be discussed with reference to example embodiments. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Without departing from the scope of protection of the content of this specification, changes can be made to the functions and arrangements of the elements discussed. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described relative to some examples can also be combined in other examples. Example 1

[0040] Please refer to Figure 1, An alcohol detection device based on face recognition, comprising: an external housing 1, a detection module 2, and a foldable blowing module 3. Among them, the housing of the external housing 1 can be made of ABS+PC alloy material, with an equipment compartment arranged inside, and a capacitive touch screen integrated on the front of the external housing 1. The detection module 2 is installed in the equipment compartment inside the external housing 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, with a built-in live detection algorithm, which can capture 48 facial feature points, and the dynamic recognition angle range is ±30°. The alcohol detection unit can include structures such as an alcohol sensor, a pressure sensor, and a sampling air pump. Among them, the alcohol sensor can be a 16mm electrochemical alcohol sensor, with a detection range of 0-2mg / L and a detection error of ±0.02mg / L. The control unit is mainly composed of structures such as an integrated circuit board and a processor. The processor can be an ARM-M4 main control chip, integrated with the MODBUS communication protocol, and can coordinate the logical judgment of face data and alcohol concentration in real time. Since the detection module 2 belongs to the prior art, the implementation process and principle thereof will not be elaborated herein.

[0041] Please refer to Figures 1 to 3 and Figure 7 , The blowing module 3 includes a blowing component 31, a protection component 32, a connecting cover 33, and a rigid air delivery pipe 34. The connecting cover 33 is detachably installed on one side of the external housing 1, and the air inlet end of the alcohol detection unit is communicated with one end of the connecting cover 33. The air delivery pipe 34 is arranged outside the external housing 1, and one end of the air delivery pipe 34 is communicated with one side of the connecting cover 33 through a flexible pipe. The air delivery pipe 34 is in an L shape. When it is in a contracted state, it is placed against 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 movement of the air delivery pipe 34. The blowing component 31 includes a conducting pipe fitting 311, a pressure switch component 312, and a blowing head 313 adapted to the human mouth. One end of the blowing head 313 is communicated with the end of the air delivery pipe 34 through the conducting pipe fitting 311. The pressure switch component 312 is arranged on the blowing head 313. When the outside of the blowing head 313 is subjected to pressure, the blowing head 313 is adjusted to an open state through the pressure switch component 312. The protection component 32 is used to isolate the blowing head 313 in the contracted state from the external environment.

[0042] It should be noted that when the above alcohol detection device is in use, the staff first unfolds the air outlet module in the folded state, so that the blowing module 3 is on the front of the outer shell 1 and just in the recognizable area of the face recognition unit. Then, the staff sets a disposable film sleeve adapted to the blowing head 313 on the blowing head 313, then holds the end of the blowing head 313 with the mouth and gently bites the position of the pressure switch 312 with the teeth. At this time, the pressure switch 312 detects the pressure and adjusts the blowing head 313 to the open state. At this time, the face recognition unit captures the image data of the staff's mouth holding the blowing head 313 in real time to confirm that the staff is performing a normal blowing behavior. Then, the staff starts to continuously blow air into the blowing head 313 according to the prompts on the touch screen and stops blowing after hearing the stop blowing prompt. The staff separates the mouth from the blowing head 313 and removes the disposable film sleeve from the blowing head 313. The gas enters from the blowing head 313, passes through the air delivery pipe 34 and the connecting cover 33 in sequence, and finally enters the alcohol detection unit. The alcohol detection unit detects the alcohol concentration of the incoming gas, then records the result of the alcohol detection, and simultaneously displays it on the display screen.

[0043] In this way, by adding an auxiliary blowing module 3 at the air inlet 3124 position of the detection module 2, and the blowing module 3 adopts a combined structure of a folded L-shaped rigid air delivery pipe 34 and a silicone hose, which clings to the shell when contracted and is accurately positioned to the face recognition area after unfolding, realizing the spatial synchronization of the blowing path and face recognition; the blowing head 313 is internally provided with a pressure trigger switch, which needs to be activated by teeth biting to ensure ventilation, ensuring that the blowing action must be completed by the human mouth; the protective part 32 isolates external pollution in the storage state and is quickly docked with 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, and through double locking of physical contact and biometric features, cheating behaviors such as blowing fakes and remote proxy blowing are fundamentally eliminated, enabling the existing sensors of the detection module 2 to exert the maximum detection accuracy in a controlled environment.

[0044] Please refer to Figures 3 to 5 , the blowing head 313 includes a gas collecting pipe 3131 and a flat bite short pipe 3132, and the inner groove of the bite short pipe 3132 is a rectangular groove. The bite short pipe 3132 is detachably installed at one end of the gas collecting pipe 3131. Among them, the gas collecting pipe 3131 is a spiral tapered pipe, and a spiral groove 3133 with a depth of 0.2 - 0.25 mm is provided on the inner wall of the spiral tapered pipe. An exhaust micropore 3134 communicating with the end of the spiral groove 3133 is provided at one end of the spiral tapered pipe far from the bite short pipe 3132.

[0045] 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. Guided by the inner wall spiral groove 3133, it forms a high-speed swirling flow. Under the action of centrifugal force, the liquid water mist is thrown towards the tube wall and moves along the spiral groove 3133 towards the end, and finally is discharged through the exhaust micropores 3134 distributed annularly at the bottom. In this way, automatic centrifugal dehydration treatment of the exhaled gas is achieved, and the dried gas after dehydration continues to flow towards the sensor, avoiding the problem that the detection accuracy of the sensor is affected due to excessive water content in the gas during continuous detection. At the same time, the high-speed air flow realizes self-cleaning of the tube wall through the micro-turbulence of the spiral groove 3133, ensuring long-term stable operation.

[0046] Please refer to Figure 3 , Figure 4 and Figure 6 , the pressure switch 312 is of a slider structure. The slider structure includes a sealing slider 3121 and an elastic support 3122. An activity groove 3123 is provided on one side of the engaging short tube 3132. The bottom of the sealing slider 3121 slides from the outside of the engaging short tube 3132 and extends into the activity groove 3123. An air inlet 3124 is provided on one side of the sealing slider 3121. The elastic support 3122 is installed between the sealing slider 3121 and the inner side of the activity groove 3123. The elastic support 3122 can be a spring, and the number of springs is two, symmetrically distributed on both sides of the sealing slider 3121.

[0047] It should be noted that when the above-mentioned slider structure is in use, precise control of the blowing pipeline is achieved through the dual design of engaging trigger and mechanical linkage: In the initial state, the symmetric springs hide the air inlet 3124 at the top of the sealing slider 3121 inside the wall of the engaging short tube 3132, and use the bottom of the sealing slider 3121 to achieve physical blockage; when the upper jaw teeth apply a biting pressure, the sealing slider 3121 presses down along the activity groove 3123 by more than the critical displacement (limited by the compression stroke of the double springs), so that the hidden air inlet 3124 is aligned and conducted with the pipeline. This design converts the physiological behavior (tooth biting force) into a mechanical action, which not only ensures that non-living bodies 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 characteristic of the slider fundamentally eliminates the accidental closing or air leakage of the valve during the blowing process, ensuring the continuity and integrity of the detection air flow, and finally forming an irreversible forgery-proof blowing start verification mechanism.

[0048] Please refer to Figure 1 and Figure 2, the conducting pipe fitting 311 is a rotating pipe. One end of the rotating pipe is rotatably connected to one end of the gas transmission pipe 34. The included angle between the rotating pipe and the gas transmission 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. The fixed protective structure includes a protective cover body 321 with an open bottom. The protective cover body 321 is slidably installed on the side of the outer shell 1, and a storage cavity for placing a disposable protective film sleeve can be provided on the protective cover body 321.

[0049] It should be noted that after the blowing is completed, the blowing module 3 needs to be folded and retracted. By rotating the gas transmission pipe 34, it approaches the front of the outer shell 1 and finally fits. Then, by rotating the rotating pipe, it rotates and fits the side of the outer shell 1. Then, the protective cover body 321 is pulled downward so that the protective cover body 321 completely covers the outside of the blowing component 31. In this way, external dust can be prevented from contaminating the blowing component 31, ensuring the hygienic safety of the daily use of the blowing component 31.

[0050] Please refer to Figure 10 , the alcohol detection device based on face recognition further includes a mounting base 4 that is installed and used in cooperation with the outer 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, and a mating card slot 43 adapted to the protrusions 42 is provided on the back of the outer shell 1. Embodiment 2

[0051] Please refer to Figure 8 and Figure 9 , the present invention also provides an implementation manner of the protective component 32. The difference from Embodiment 1 is that: the conducting pipe fitting 311 is an elastic bent pipe. The two ends of the bent pipe are respectively fixedly communicated with the gas collecting pipe 3131 and the gas transmission pipe 34. When the bent pipe is not compressed, it is inclined at 100 - 150 degrees. The protective component 32 is a following protective structure. The following protective structure includes a movable sleeve 322 with an open bottom. The bottom of the movable sleeve 322 is slidably connected to the outside of the gas transmission pipe 34 through a sliding connecting member 324. An extension slot 323 adapted to the bent pipe is provided at the bottom of the movable sleeve 322.

[0052] It should be noted that when the above-mentioned protective component 32 is in use, by pulling the movable sleeve 322 upward, it starts to slide upward along the gas transmission pipe 34, and the bent pipe rebounds and resets upward synchronously under the action of its own elastic force until the movable sleeve 322 moves upward to the maximum displacement, just making the bent pipe return to its initial form. At this time, the air outlet component is unfolded, and the outside of the bent pipe is just clamped with the stretching notch 323, and the blowing head 313 can be blown. After the blowing is over, when the gas transmission pipe 34 is rotated to fit with the external housing 1, by pulling the movable sleeve 322 downward, the blowing component 31 can be squeezed into the movable sleeve 322, and the blowing component 31 is protected by the movable sleeve 322 and isolated from the external environment. Embodiment III

[0053] 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. The detection method includes:

[0054] S1. Expand the blowing module 3 in the folded and contracted state, so that the blowing head 313 extends to the outside of the external housing 1 through the rigid gas transmission pipe 34;

[0055] S2. Obtain the face dynamic data through the face recognition unit in the detection module 2. If the face information that meets the preset conditions is recognized, the control unit starts the alcohol detection unit;

[0056] S3. The user applies pressure to the blowing head 313, triggering the pressure switch 312 to make the blowing head 313 in the open state, and at the same time the face recognition unit continuously verifies the contact state between the user's mouth and the blowing head 313;

[0057] S4. When the user blows air, the gas flows through the blowing head 313, the conduction pipe fitting 311, the gas transmission pipe 34 and the communication cover 33 in sequence, and enters the alcohol detection unit for alcohol content detection;

[0058] S5. If the alcohol detection unit measures that the alcohol content exceeds the threshold, the control unit prohibits subsequent operations; if it does not exceed the threshold, the control unit allows subsequent operations.

[0059] The above describes the embodiments of the specific implementation manner, but this embodiment is not limited to the above specific implementation manner. The above specific implementation manner is only illustrative and not restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of this 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; 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; 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 thereof is provided with an exhaust microhole (3134) connected to the end of the spiral groove (3133); The pressure switch element (312) is a slider structure, which includes a sealing slider (3121) and an elastic support body (3122); 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); and the elastic support body (3122) is installed between the sealing slider (3121) and the inner side of the movable groove (3123).

2. The alcohol detection device based on face recognition according to claim 1, 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.

3. The alcohol detection device based on face recognition according to claim 2 is 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).

4. The alcohol detection device based on face recognition according to claim 3 is characterized in that: The conducting pipe (311) is an elastic bending pipe, which is inclined at 100-150 degrees in its natural state.

5. The alcohol detection device based on face recognition according to claim 4 is 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.

6. An alcohol detection device based on face recognition according to any one of claims 1 to 5, 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).

7. An alcohol detection method based on face recognition of the alcohol detection device according to any one of claims 1 to 5, 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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