Vehicle seat belt wearing state recognition device and recognition method

Abstract

The application discloses a vehicle safety belt wearing state recognition device and a recognition method. The vehicle safety belt wearing state recognition device comprises a plurality of signal marking members, a plurality of signal recognition components and a controller, wherein the plurality of signal marking members are embedded in different positions of a safety belt webbing respectively; the plurality of signal recognition components are arranged at different positions of a seat to sense magnetic field changes generated when the signal marking members pass and output recognition signals; and the controller is in communication connection with the signal recognition components and recognizes a safety belt wearing state according to the recognition signals output by the signal recognition components. The vehicle safety belt wearing state recognition method comprises the following steps: the application adopts multi-position detection and can recognize a plurality of wearing path errors. The application sets the signal marking members and the signal recognition components, realizes a low-cost, all-weather and high-robustness safety belt path monitoring means.

Description

Technical Field

[0001] This invention relates to the field of vehicle-related technologies, and in particular to a vehicle seatbelt wearing status recognition device, a vehicle seatbelt wearing status recognition method, an electronic device, a storage medium, and a computer program product. Background Technology

[0002] Seat belts are the most effective and basic safety device in a vehicle. Wearing a seat belt correctly can reduce the risk of death by 50% and the risk of serious injury by 70% in a collision. However, improper seat belt use is common in real life. Statistics show that a large proportion of vehicle occupant injuries and fatalities are due to improper seat belt use, and one-third of these are caused by incorrect placement (e.g., turning the seat belt behind the back or passing it under the armpits). With increasingly stringent vehicle standards (such as ENCAP 2026 and CNCAP 2027), identifying and reminding passengers of incorrect seat belt use has become an important part of vehicle star rating systems.

[0003] The existing seatbelt reminder methods include the following: The first type is the existing Safety Belt Reminder (SBR) system, which uses seat belt detection schemes based on buckle switches, capacitive switches, or magnetic induction (e.g., Chinese patent CN220447809U). In this scheme, after the latch enters the buckle, the internal ferromagnetic component changes the magnetic field strength sensed by the Hall element, causing the output voltage to flip, and the system determines "insertion" based on this.

[0004] The drawback of this solution is that it can only determine the "inserted / not inserted" state and cannot identify path errors such as "false fastening, low mounting, seat belt behind the back, or under the armpit". Therefore, it cannot identify whether the occupant is wearing the seat belt correctly, resulting in a significant decrease in protection efficiency during a collision.

[0005] The second method uses visual recognition via cameras from the Occupancy Monitoring System (OMS). This approach uses OMS cameras positioned on the roof, rearview mirrors, or near the A-pillars to determine the seatbelt status in the images using visual recognition algorithms.

[0006] The drawback of this solution is: 1. Difficulty in edge case recognition: When dealing with extreme sitting postures, special body shapes, clothing occlusion, etc., the OMS system is prone to misjudgment or missed judgment. For example, it can easily lead to privacy leaks and missed detection due to strong light overexposure; low contrast of dark / patterned webbing leads to recognition failure; missegmentation occurs when the color of the occupant's clothing is similar to that of the webbing, resulting in poor recognition performance. 2. Image quality affects recognition accuracy: The pixel count of current mainstream OMS cameras is generally low (commonly 1MP~5MP), far lower than that of consumer-grade devices. This results in the loss of image details under conditions such as low light, backlight, and strong light reflection, which affects the algorithm's judgment. 3. Limited camera vision: OMS cameras are usually placed on the roof, near the rearview mirror or A-pillar, which may result in blind spots or pitch angle errors, potentially leaving some passengers (such as those in the outer rear seats or children) in blind spots. 4. Prone to false identification: Passengers who are small in stature may be mistakenly identified as "not wearing" their seat belts because the belts are not snug against their bodies; the system may fail to recognize the seat belts if they are covered by a coat; and the system may fail to detect deception if passengers insert the seat belts "behind their backs" to make it appear as if they are wearing them. The third method is a detection scheme that combines a flexible magnetic sheet with a Hall signal recognition component (2) (e.g., Chinese patent CN118894061A). This scheme uses a combination of a flexible magnetic sheet and a Hall signal recognition component (2) to identify whether the occupant is wearing the seat belt correctly. The principle is mainly that the change in the magnetic field of the flexible magnetic sheet on the seat belt causes a change in the voltage of the Hall signal recognition component (2). The voltage magnitude is directly proportional to the magnetic field strength, while the magnetic field strength is inversely proportional to the distance. The distance data between the two signal recognition components (2) is used to determine whether the seat belt is worn correctly. Although this scheme avoids the problems of nighttime / occlusion in visual schemes, it still has shortcomings: 1. When the occupant turns the waist belt completely behind their back and wears the shoulder straps correctly, as long as the magnetic plate is still within 30mm of the side wing signal recognition component (2), the system will mistakenly conclude that the belt is worn correctly. 2. In scenarios where the seat belt is worn under the armpit instead of over the shoulder, the distance between the signal recognition component (2) on the seat cushion and side wing and the soft magnetic piece located on the shoulder strap still conforms to the distance state for correctly wearing the seat belt, and the system will give the conclusion that it is correctly worn; Therefore, existing technologies struggle to achieve a low-cost, all-weather, and highly robust seatbelt path monitoring method under complex and varied occupant postures and clothing conditions. Summary of the Invention

[0007] Therefore, it is necessary to address the technical problem that existing technologies struggle to achieve a low-cost, all-weather, and highly robust seatbelt path monitoring method under complex and varied occupant postures and clothing conditions. This requires providing a vehicle seatbelt wearing status recognition device, a vehicle seatbelt wearing status recognition method, electronic equipment, storage media, and computer program product.

[0008] This invention provides a vehicle seatbelt wearing status recognition device, comprising: multiple signal markers, multiple signal recognition components, and a controller, wherein: The signal markers are embedded in different positions on the seatbelt webbing; Multiple signal recognition components are disposed at different positions on the seat to sense changes in the magnetic field generated when the signal marker passes by and output recognition signals; The controller is communicatively connected to the signal recognition component and identifies the seat belt wearing status based on the recognition signal output by the signal recognition component.

[0009] Furthermore: The signal markers include: a first signal marker disposed on the shoulder strap of the seat belt, a second signal marker disposed on the shoulder strap of the seat belt, and a third signal marker disposed on the waist belt of the seat belt; The signal recognition component includes: a first signal recognition component disposed on the side wing of the seat, a second signal recognition component disposed on the backrest of the seat, and a third signal recognition component disposed on the seat cushion.

[0010] Furthermore, the signal marker is a conductive metal, and the signal recognition component is an element capable of recognizing the impedance of the metal.

[0011] Furthermore, the signal marker also includes a capacitor connected in parallel with the conductive metal, and the signal recognition component is an element capable of recognizing the metal impedance and the resonant frequency of the LC circuit.

[0012] Furthermore, different signal markers have different sizes of conductive metal, different materials of conductive metal, and / or different capacitance values.

[0013] This invention provides a method for recognizing vehicle seatbelt wearing status, employing the vehicle seatbelt wearing status recognition device as described above, comprising: In response to a seatbelt buckle engagement event, acquire identification signals output by multiple signal recognition components; Location codes are generated based on multiple identification signals; The seatbelt wearing path is determined based on the location code; The seatbelt wearing status of the vehicle is determined based on the seatbelt wearing path.

[0014] Furthermore, the signal marker is a conductive metal, the signal recognition component is an element capable of detecting changes in metal impedance, the recognition signal includes an impedance signal, and the method further includes: The impedance signal in the identification signal of each signal identification component before the seat belt buckle engagement event is used as the reference impedance corresponding to the signal identification component; The step of acquiring identification signals output by multiple signal identification components in response to a seatbelt buckle engagement event includes: in response to a seatbelt buckle engagement event, using the impedance signal in the identification signal of each of the signal identification components when the seatbelt buckle is engaged as the current impedance; The generation of location codes based on multiple identification signals includes: The magnitude of the difference between the current impedance of each signal identification component and the corresponding reference impedance number is calculated as the impedance change magnitude of each signal identification component, and the impedance change magnitude of each signal identification component is compared with a magnitude threshold. When the magnitude of the impedance change is greater than or equal to the magnitude threshold, the value of the position of the identification signal in the position code is set to the position value. When the magnitude of the impedance change is less than the corresponding magnitude threshold, the value of the position of the identification signal in the position code is set to the departure value. The position value is used to indicate that the signal marker is close to the signal identification component, and the departure value is used to indicate that the signal marker is far away from the signal identification component.

[0015] Furthermore, the signal marker also includes a capacitor connected in parallel with the conductive metal, the signal recognition component is an element capable of recognizing changes in metal impedance and the resonant frequency of the LC circuit, the recognition signal also includes the resonant frequency, and the step of setting the value of the identification signal bit in the position code to an "on" value when the magnitude of the impedance change is greater than or equal to a magnitude threshold, and setting the value of the identification signal bit in the position code to an "off" value when the magnitude of the impedance change is less than the corresponding magnitude threshold, includes: When the impedance change magnitude is greater than or equal to the magnitude threshold and the resonant frequency is within the corresponding frequency range, the value of the identification signal in the position code is set to the position value. When the impedance change magnitude is less than the corresponding magnitude threshold or the resonant frequency is outside the corresponding frequency range, the value of the identification signal in the position code is set to the departure value resonant frequency. The frequency range corresponds one-to-one with the signal identification component.

[0016] This invention provides an electronic device, comprising: At least one processor; and, A memory communicatively connected to at least one of the processors; wherein, The memory stores instructions that are executed by at least one of the processors to enable the at least one processor to perform the vehicle seatbelt wearing status recognition method as described above.

[0017] The present invention provides a storage medium that stores computer instructions, which, when executed by a computer, are used to perform all the steps of the vehicle seatbelt wearing status recognition method as described above.

[0018] This invention provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the vehicle seatbelt wearing status recognition method as described above.

[0019] This invention embeds multiple signal markers at different positions on the seatbelt webbing and sets multiple signal recognition components at different positions on the seat. The seatbelt wearing status is identified based on the recognition signals output by these components. By detecting the corresponding signal markers at different positions, the correct positioning of the signal markers at multiple positions is determined. This multi-position detection accurately identifies the seatbelt wearing status. This invention employs multi-position detection, enabling the identification of various wearing path errors. Furthermore, since it uses signal markers and signal recognition components, and the signal recognition components sense the magnetic field changes generated when the signal markers pass by, an OMS (Optical Magnetic Tracking System) is unnecessary, avoiding visual recognition errors. This invention, through the use of signal markers and signal recognition components, achieves a low-cost, all-weather, and highly robust seatbelt path monitoring method. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a vehicle seatbelt wearing status recognition device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a vehicle seatbelt wearing status recognition device according to an embodiment of the present invention when the occupant is correctly wearing the seatbelt; Figure 3 This is a schematic diagram of a signal marker structure according to an embodiment of the present invention; Figure 4 The equivalent circuit diagram of a parallel capacitor of conductive metal; Figure 5 This is a flowchart illustrating a method for recognizing the wearing status of a vehicle seatbelt according to an embodiment of the present invention. Figure 6 A flowchart illustrating the process of a vehicle seatbelt wearing status recognition method according to the preferred embodiment of the present invention; Figure 7 This is a schematic diagram of the hardware structure of an electronic device according to the present invention.

[0021] Marker description 1. Signal marker; 11. First signal marker; 12. Second signal marker; 13. Third signal marker; 2. Signal recognition component; 21. First signal recognition component; 22. Second signal recognition component; 23. Third signal recognition component; 3. Controller; 4. Seat belt webbing; 41. Seat belt shoulder strap; 42. Seat belt lap belt; 5. Seat; 51. Seat side wing; 52. Seat backrest; 53. Seat cushion; 6. Conductive metal; 7. Capacitor. Detailed Implementation

[0022] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component. These terms are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to has a specific orientation, or is constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "exemplary," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this application. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0024] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this application, unless otherwise stated, "a plurality of" means two or more.

[0025] In describing some embodiments, the term "connection" and its derivative expressions may be used. For example, the term "connection" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact with each other. The embodiments claimed herein are not necessarily limited to the content of this document.

[0026] Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0027] This document describes exemplary embodiments in conjunction with the accompanying drawings, all of which are idealized schematic diagrams. For clarity, the thickness proportions of various structural layers and regions may be enlarged in the drawings. Those skilled in the art should understand that due to objective factors such as manufacturing processes and measurement tolerances, the shape of the actual product may reasonably differ from that shown in the drawings. Therefore, the understanding of the exemplary embodiments should not be limited to the schematic shapes shown in the drawings. Any reasonable variations caused by the manufacturing process that are not substantially different from the shape shown in these drawings should be considered to fall within the scope of the embodiments disclosed in this specification. The drawings themselves are not intended to limit the precise geometry of the actual product, nor do they constitute a limitation on the scope of patent protection.

[0028] like Figure 1 The image shows an embodiment of a vehicle seatbelt wearing status recognition device according to the present invention, comprising: multiple signal markers 1, multiple signal recognition components 2, and a controller 3, wherein: The multiple signal markers 1 are respectively embedded in different positions of the seat belt webbing 4; Multiple signal recognition components 2 are disposed at different positions on the seat 5 to sense the magnetic field changes generated when the signal marker 1 passes by and output recognition signals; The controller 3 is communicatively connected to the signal recognition component 2, and identifies the seat belt wearing status based on the recognition signal output by the signal recognition component 2.

[0029] Specifically, the functional components of this invention mainly include: a signal marker 1 capable of emitting or being identified, a signal recognition component 2 for identifying seat belt signals, and a controller 3. The signal marker 1 is embedded in the seat belt webbing 4 and distributed in a certain manner at different locations on the seat belt webbing 4, used to emit relevant physical signals that are recognized by the signal recognition component 2. The signal recognition component 2 is distributed in multiple locations on the seat 5, such as the seat cushion, the center of the backrest, and the side wings of the seat, used to identify the physical signals of the active or passive signal markers 1 distributed at different locations in the seat belt webbing, and to identify the signals to the controller 3. The identification signal includes at least an impedance signal that can be used to determine whether an identification signal marker 1 is near the signal recognition component 2.

[0030] In some specific implementation cases, the aforementioned active or passive signal marker 1 is combined with the signal recognition component 2, including conductive metal as signal marker 1 and inductive sensor as signal recognition component 2, flexible conductive fiber as signal marker 1 and capacitive sensor as signal recognition component 2, etc. The principle is based on the change in electrical signal (inductance or capacitance) caused by changes in electric or magnetic fields, and the electrical signal serves as the recognition signal.

[0031] The vehicle controller 3 is connected to the signal recognition component 2 and is used to execute the vehicle seat belt wearing status recognition method. It collects the recognition signal from the signal recognition component 2 and outputs a judgment value based on the recognition signal to indicate whether the signal marker 1 is close to the signal recognition component 2 or the signal marker 1 is far away from the signal recognition component 2. This allows the recognition of the seat belt wearing path as a correct over-the-shoulder and over-the-chest wearing path, an underarm wearing path, a shoulder strap behind the back wearing path, a lap belt behind the back wearing path, or a shoulder strap and lap belt behind the back wearing path, etc., and determines the seat belt wearing status based on the seat belt wearing path.

[0032] In some embodiments, when the seatbelt is incorrectly worn, an audio-visual warning is issued to remind passengers to use the seatbelt correctly. When the seatbelt is correctly worn, the vehicle controller 3 does not issue an audio-visual warning.

[0033] The judgment value is either the position value or the departure value. The position value indicates that the controller 3 determines that the signal marker 1 is close to the signal recognition component 2 based on the recognition signal, while the departure value indicates that the controller 3 determines that the signal marker 1 is far away from the signal recognition component 2 based on the recognition signal.

[0034] When the signal marker 1 approaches the signal recognition component 2, the controller 3 compares the recognized signal with a preset threshold and outputs the position value. When the seat belt signal device moves away from the signal recognition component 2, the controller 3 compares the recognized signal with a preset threshold and outputs the departure value.

[0035] Specifically, 1 can be used as the arrival value and 0 as the departure value, or 0 can be used as the arrival value and 1 as the departure value.

[0036] Since both the signal marker 1 and the signal recognition component 2 are set in multiple locations, each signal marker 1 and a signal recognition component 2 form a group. The signal recognition component 2 detects whether the signal marker 1 is close to the signal recognition component 2. By combining multiple groups of signal markers 1 and signal recognition components 2, it is determined whether the seat belt webbing 4 is close to the seat in multiple locations, thereby identifying whether the occupant's wearing path is the correct over-the-shoulder and over-the-chest wearing path, under-the-arm wearing path, back wearing path, etc.

[0037] This invention embeds multiple signal markers at different positions on the seatbelt webbing and sets multiple signal recognition components 2 at different positions on the seat. The seatbelt wearing status is identified based on the recognition signals output by the signal recognition components 2. By detecting the corresponding signal markers at different positions using the signal recognition components 2, the correct positioning of the signal markers at multiple positions is identified. Through this multi-position positioning detection, the seatbelt wearing status is accurately identified. This invention employs multi-position detection, enabling the identification of various wearing path errors. Furthermore, since it uses signal markers and signal recognition components 2, and the signal recognition components 2 sense the magnetic field changes generated when the signal markers pass by, an OMS (Optical Magnetic Tracking System) is not required, avoiding visual recognition errors. This invention, by setting up signal markers and signal recognition components 2, achieves a low-cost, all-weather, and highly robust seatbelt path monitoring method.

[0038] Another embodiment of the present invention provides a vehicle seatbelt wearing status recognition device, comprising: multiple signal markers 1, multiple signal recognition components 2, and a controller 3. The signal markers 1 are conductive metals, and the signal recognition components 2 are elements capable of detecting metal impedance. The multiple signal markers 1 are embedded in different positions of the seat belt webbing 4. The signal markers 1 include: a first signal marker 11 arranged on the seat belt shoulder strap 41, a second signal marker 12 arranged on the seat belt shoulder strap 41, and a third signal marker 13 arranged on the seat belt waist belt 42. Multiple signal recognition components 2 are disposed at different positions of the seat 5 to sense the magnetic field changes generated when the signal marker 1 passes by and output recognition signals. The signal recognition components 2 include: a first signal recognition component 21 disposed on the side wing 51 of the seat, a second signal recognition component 22 disposed on the backrest 52 of the seat, and a third signal recognition component 23 disposed on the seat cushion 53. The controller 3 is communicatively connected to the signal recognition component 2, and identifies the seat belt wearing status based on the recognition signal output by the signal recognition component 2.

[0039] Specifically, such as Figure 2 As shown, when the occupant is wearing the seatbelt correctly, the first signal marker 11, located on the seatbelt shoulder strap 41, is positioned on the occupant's shoulder, the second signal marker 12 is positioned on the occupant's chest, and the third signal marker 13 is positioned on the occupant's waist. The first signal recognition component 21 is used to detect the first signal marker 11, the second signal recognition component 22 is used to detect the second signal marker 12, and the third signal recognition component 23 is used to detect the third signal marker 13.

[0040] In one example, 1 is used as the value at position and 0 is used as the value at departure: When the controller 3 outputs a judgment value of 0 after judging the recognition signals of the first signal recognition component 21 and the second signal recognition component 22 on the seat side wing 51 and the seat back 52, and outputs a judgment value of 1 after judging the recognition signal of the third signal recognition component 23 on the seat cushion 53, the seat belt is worn behind the lap belt and is judged to be in an incorrect wearing state.

[0041] When the controller 3 outputs a judgment value of 1 after judging the recognition signals of the first signal recognition component 21 and the second signal recognition component 22 on the seat side wing 51 and the seat back 52, and outputs a judgment value of 0 after judging the recognition signal of the third signal recognition component 23 on the seat cushion 53, the seat belt is worn behind the shoulder strap and is judged to be in an incorrect wearing state. When the controller 3 outputs a judgment value of 1 after judging the recognition signal of the first signal recognition component 21 on the seat side wing 51, and outputs a judgment value of 0 after judging the recognition signals of the second signal recognition component 22 and the third signal recognition component 23 on the seat back 52 and the seat cushion 53, the seat belt is in the underarm wearing path and is judged to be in an incorrect wearing state. When the controller 3 outputs a judgment value of 1 after judging the recognition signals of the first signal recognition component 21, the second signal recognition component 22, and the third signal recognition component 23, the seat belt is worn on the back of the shoulder belt and waist belt, and is judged to be in an incorrect wearing state.

[0042] Only when the controller 3 outputs a judgment value of 0 after judging the recognition signals of the first signal recognition component 21, the second signal recognition component 22, and the third signal recognition component 23, is the seat belt correctly worn over the shoulder and chest, and is judged to be in the correct wearing state.

[0043] In this embodiment, a conductive metal is used as a signal marker 1 embedded in the seat belt webbing 4, and an inductive sensor is used as a signal recognition component 2.

[0044] The conductive metal can be selected from copper foil, aluminum foil, stainless steel wire, conductive coating, etc., and is embedded / printed / impregnated into the seat belt webbing in the form of "strips" or "segments". The conductive metal material, serving as the first signal marker 11 and the second signal marker 12, is arranged on the seat belt shoulder strap 41, and the conductive metal material, serving as the third signal marker 13, is arranged on the seat belt waist belt 42, with a length of about 30cm to cover the sensor position; it is used to provide the sensor with an impedance change signal after the passenger's seat belt is fastened. The thickness of the conductive metal signal marker 1 is typically ≤ 0.05 mm and the width is 8–12 mm, which has almost no impact on the flexibility of the webbing.

[0045] The signal recognition component 2 is an element capable of recognizing metallic impedance. Preferably, the signal recognition component 2 is an inductive sensor, and multiple inductive sensors form an inductive sensor array. Specifically, the first inductive sensor, serving as the first signal recognition component 21, is located on the seat side wing 51 and is used to detect the impedance signal of the first signal marker 11 made of conductive metal; the second inductive sensor, serving as the second signal recognition component 22, is located on the inner side of the seat back 52 and is used to detect the impedance signal of the second signal marker 12 made of conductive metal; and the third sensor, serving as the third signal recognition component 23, is located on the inner side of the seat cushion 53 and is used to detect the impedance signal of the third signal marker 13 made of conductive metal; and the impedance signal is output to the controller 3.

[0046] The vehicle control unit (ECU) is used as controller 3. Controller 3 is connected to the aforementioned sensor array circuit to execute the vehicle seat belt wearing status recognition method, collect sensor signals, determine and output the seat belt wearing status, and select whether to issue an audible warning.

[0047] The main detection principle of this embodiment is as follows: a conductive metal material is set at a preset position along the length of the seat belt webbing 4 as a signal marker 1, and an inductive sensor array is arranged at a preset position inside the seat 5 to detect the impedance change of the conductive metal material. The controller 3 then reads the signal from the sensor array. Because the sensor signals of the human shoulder and hip are significantly different under three paths: the correct shoulder and chest wearing path, the back wearing path (including the shoulder strap back wearing path, the lap belt back wearing path, or the shoulder strap and lap belt back wearing path), and the underarm wearing path, the actual wearing path of the seat belt can be calculated based on the preset path recognition algorithm. If it is an incorrect wearing state, the vehicle's human-machine interface is triggered to issue a corresponding audio-visual warning to remind passengers to fasten their seat belts correctly in time, thereby improving driving safety.

[0048] The principle of inductive sensor signal detection is as follows: A high-frequency magnetic field is used to generate eddy currents in a metal target, and the reaction of these eddy currents is converted into a change in coil impedance, which is then converted into an electrical signal. This process mainly involves three steps: 1. An internal oscillator supplies a sinusoidal current of 100kHz to 2MHz to the coil, thereby generating an alternating magnetic field H; 2. When the conductive metal material enters the magnetic field, eddy currents i are induced on its surface; these eddy currents generate a reverse magnetic field H′ according to Lenz's law, causing the equivalent inductance L of the original coil of the inductive sensor to decrease and the equivalent resistance R to increase. Therefore, a measurable complex impedance change ΔZ appears, resulting in the complex impedance Z = R + jωL; 3. The complex impedance change ΔZ is converted into a digital signal and output as an identification signal. If the controller 3 detects that the magnitude of the complex impedance change |ΔZ| exceeds a set threshold, it outputs an identification signal indicating that the marker 1 is in position near the signal identification component 2; otherwise, it outputs a departure value. Then, the controller 3 determines the corresponding output judgment value based on the impedance signals output by different inductive sensors, and based on multiple output judgment values, determines the vehicle's seatbelt wearing status.

[0049] This embodiment enables accurate identification, improving safety. Since the shoulder area is far from the main torso, a single signal marker 1 cannot obtain a stable signal at this location, nor can it determine the shoulder strap's trajectory. This embodiment uses a combination of multiple conductive metal codes to help determine the seatbelt shoulder strap's trajectory, resolving the ambiguity of single-point detection. It can identify incorrect underarm wearing, directly distinguishing between correct wearing (over the shoulder / chest) and various incorrect wearing methods (underarm, back), demonstrating high recognition performance, reducing seatbelt misuse accidents, and meeting automotive safety regulations. This embodiment boasts high reliability, employing non-contact detection, eliminating the need for contact with conductive metal markers, avoiding wear, and improving system durability and stability. This embodiment features a simplified structure and high integration; the conductive metal can be impregnated or woven into the webbing, simplifying structural design, reducing manufacturing and maintenance costs, while improving system integration and aesthetics. It does not alter occupants' existing seatbelt usage habits, and the embedded material has no impact on comfort. Finally, this embodiment has strong anti-interference capabilities: the inductive sensor is insensitive to magnetic field interference, enabling stable operation in the complex electromagnetic environment inside the vehicle, and adapting to high temperature, high humidity, and vibration environments.

[0050] Another embodiment of the present invention provides a vehicle seatbelt wearing status recognition device, comprising: multiple signal markers 1, multiple signal recognition components 2, and a controller 3. Each signal marker 1 includes a conductive metal and a capacitor connected in parallel with the conductive metal. Each signal recognition component 2 is a component capable of recognizing the metal impedance and the resonant frequency of an LC circuit. Different signal markers 1 have different sizes of conductive metal, different materials of conductive metal, and / or different capacitance values. The multiple signal markers 1 are embedded in different positions of the seat belt webbing 4. The signal markers 1 include: a first signal marker 11 arranged on the seat belt shoulder strap 41, a second signal marker 12 arranged on the seat belt shoulder strap 41, and a third signal marker 13 arranged on the seat belt waist belt 42. Multiple signal recognition components 2 are disposed at different positions of the seat 5 to sense the magnetic field changes generated when the signal marker 1 passes by and output recognition signals. The signal recognition components 2 include: a first signal recognition component 21 disposed on the side wing 51 of the seat, a second signal recognition component 22 disposed on the backrest 52 of the seat, and a third signal recognition component 23 disposed on the seat cushion 53. The controller 3 is communicatively connected to the signal recognition component 2, and identifies the seat belt wearing status based on the recognition signal output by the signal recognition component 2.

[0051] Specifically, this embodiment adopts the following... Figure 3 The signal marker 1 shown is a conductive metal 6 and a capacitor 7 connected in parallel with the conductive metal 6. The capacitor 7 is preferably a miniature capacitor. The capacitor 7 can be soldered to both ends of the conductive metal 6, forming a parallel circuit with the conductive metal 6, which is preferably a metal plate. The conductive metal 6 and the capacitor 7 are integrally embedded in the seatbelt webbing 4. Figure 4 The diagram shows the equivalent circuit of the conductive metal 6 connected in parallel with the capacitor 7. The conductive metal 6 and capacitor 7 are equivalent to an LC circuit; more specifically, the conductive metal 6 and capacitor 7 are equivalent to an LC oscillation circuit. According to the LC resonant frequency formula, the signal marker 1 has a resonant frequency. Where f is the resonant frequency of signal marker 1, L is the inductance determined by the shape and size of conductive metal 6, and C is the capacitance of capacitor 7. By changing the shape and size of conductive metal 6 (e.g., length, width, thickness), the material of conductive metal 6, and / or the capacitance value of capacitor 7, different resonant frequencies can be set for different signal markers 1. Signal recognition component 2 is a component capable of recognizing metal impedance and the resonant frequency of the LC circuit. Preferably, signal recognition component 2 is a digital inductive sensor.

[0052] During detection, on the one hand, the signal recognition component 2 can detect the complex impedance and output the detected impedance signal. On the other hand, the signal recognition component 2 uses frequency sweep excitation. When the transmission frequency is consistent with the resonant frequency of the signal marker 1, resonant coupling will occur, and the power consumption or other parameters of the signal recognition component 2 will show obvious peaks. The frequency corresponding to the peak is recorded as the resonant frequency of the signal marker 1.

[0053] Therefore, by changing the shape and size of the conductive metal 6, the material of the conductive metal 6, and / or the capacitance value of the capacitor 7 on different signal markers 1, signal markers 1 with different resonant frequencies can be obtained. The identification signal output by the signal recognition component 2 includes the impedance signal and the resonant frequency. The controller 3 determines whether the detected impedance signal comes from the correct signal marker 1 based on the resonant frequency identified by the signal recognition component 2, thus avoiding false detections.

[0054] This embodiment forms an LC circuit by arranging a conductive metal and a capacitor in parallel. The resonant frequency is used to identify the signal marker. Combined with the impedance signal identified by the inductive sensor, the system can accurately determine whether the corresponding signal marker is close, thereby improving the detection accuracy.

[0055] like Figure 5 The diagram shown is a flowchart of a vehicle seatbelt wearing status recognition method according to an embodiment of the present invention. It employs the vehicle seatbelt wearing status recognition device as described above, including: Step S501: In response to the seatbelt buckle engagement event, acquire the recognition signals output by multiple signal recognition components 2; Step S502: Generate a location code based on multiple identification signals; Step S503: Determine the seatbelt wearing path based on the location code; Step S504: Determine the vehicle seatbelt wearing status based on the seatbelt wearing path.

[0056] Specifically, the present invention can be applied to electronic devices with processing capabilities, such as the controller 3 of a vehicle. The controller 3 is preferably an electronic control unit (ECU) of the vehicle.

[0057] First, step S501 is executed, in response to the seat belt buckle engagement event, to acquire the identification signals output by multiple signal recognition components 2.

[0058] Specifically, the existing seatbelt reminder system (SBR) can be used to detect whether the seatbelt is worn, for example, whether the buckle is properly engaged. If the SBR determines that the seatbelt is not worn, it will issue a reminder and then end the process. However, if the SBR determines that the seatbelt is worn, it will generate a seatbelt buckle engagement event, triggering step S501 to further determine the seatbelt wearing path and whether the seatbelt is worn correctly. The seatbelt buckle engagement event is the event where the seatbelt latch inserts into the corresponding buckle.

[0059] Then, step S502 is performed to generate a location code based on multiple identification signals.

[0060] Specifically, a judgment value is output based on the recognition signal to indicate whether the signal marker 1 is close to the signal recognition component 2 or the signal marker 1 is far away from the signal recognition component 2. Then, multiple judgment values ​​are combined according to their corresponding positions to generate a position code.

[0061] Then, step S503 is executed to determine the seat belt wearing path based on the location code.

[0062] Specifically, corresponding location codes are pre-generated and associated based on different seat belt wearing paths. The associated seat belt wearing path is directly determined by generating location codes based on multiple identification signals.

[0063] Seatbelt wearing paths include, but are not limited to: the correct over-the-shoulder and over-the-chest wearing path, the underarm wearing path, the shoulder strap wearing path behind the back, the lap belt wearing path behind the back, or the shoulder strap and lap belt wearing path behind the back, etc.

[0064] Finally, step S504 is executed to determine the vehicle's seatbelt wearing status based on the seatbelt wearing path. Specifically, seat belt wearing status includes correct wearing status and incorrect wearing status. If the seat belt wearing path is the correct over-the-shoulder and over-the-chest wearing path, then the seat belt wearing status is correct wearing status. If the seat belt wearing path is the underarm wearing path, the shoulder belt behind the back wearing path, the lap belt behind the back wearing path, or the shoulder belt and lap belt behind the back wearing path, then the seat belt wearing status is incorrect wearing status.

[0065] In some embodiments, it also includes: When the vehicle determines that the seat belt is not worn correctly, an audio-visual warning will be issued to remind the passengers in the vehicle to use the seat belt correctly. When the system determines that the vehicle's seatbelt is being worn correctly, no visual or auditory warning commands will be issued.

[0066] This invention employs multi-position detection to identify various incorrect wearing paths, and through position coding, it can quickly determine the seat belt wearing status of the vehicle, thereby preventing occupants from wearing seat belts incorrectly and improving driving safety.

[0067] In one embodiment, the signal marker 1 is a conductive metal, the signal recognition component 2 is an inductive sensor, the signal recognition component 2 is an element capable of detecting changes in metal impedance, the recognition signal includes an impedance signal, and the method further includes: The impedance signal in the identification signal of each signal identification component 2 before the seat belt buckle engagement event is used as the reference impedance corresponding to the signal identification component 2; The step of acquiring the identification signals output by multiple signal identification components 2 in response to the seat belt buckle fastening event includes: in response to the seat belt buckle fastening event, taking the impedance signal in the identification signal of each of the signal identification components 2 when the seat belt buckle is fastened as the current impedance; The generation of location codes based on multiple identification signals includes: The magnitude of the difference between the current impedance of each signal identification component 2 and the corresponding reference impedance number is calculated as the impedance change magnitude of each signal identification component 2, and the impedance change magnitude of each signal identification component 2 is compared with the magnitude threshold. When the impedance change magnitude is greater than or equal to the magnitude threshold, the value of the identification signal in the position code is set to the position value. When the impedance change magnitude is less than the corresponding magnitude threshold, the value of the identification signal in the position code is set to the departure value. The position value is used to indicate that the signal marker 1 is close to the signal identification component 2, and the departure value is used to indicate that the signal marker 1 is far away from the signal identification component 2.

[0068] Specifically, when a conductive metal is used as the signal marker 1 and an element capable of detecting changes in metal impedance is used as the signal recognition component 2, the recognition signal output by the signal recognition component 2 includes an impedance signal. Preferably, the signal recognition component 2 is an inductive sensor.

[0069] Each signal recognition component 2 is set with a corresponding modulus threshold. The modulus thresholds for different signal recognition components 2 can be the same or different.

[0070] The impedance signal in the identification signal of each signal identification component 2 before the seat belt buckle engagement event is used as the reference impedance corresponding to the signal identification component 2. Preferably, the impedance signal in the identification signal output by each signal identification component 2 when the vehicle is powered on and no seat belt buckle engagement event occurs is used as the reference impedance corresponding to the signal identification component 2.

[0071] A multi-bit position code is set, with each bit corresponding to a signal recognition component 2. Then, after the SBR determines that the seat belt is worn and generates a seat belt buckle engagement event, the impedance signal in the recognition signal of each signal recognition component 2 is used as the current impedance. For each signal recognition component 2, the magnitude of the difference between the current impedance and the corresponding reference impedance is calculated as the impedance change magnitude, and each impedance change magnitude is compared with the corresponding magnitude threshold. When the magnitude of the impedance change is greater than or equal to the magnitude threshold, the judgment value is the position value, and the value of the position of the identification signal in the position code is set to the position value. When the magnitude of the impedance change is less than the corresponding magnitude threshold, the judgment value is the departure value, and the value of the position of the identification signal in the position code is set to the departure value. The position value is used to indicate that the signal marker 1 is close to the signal identification component 2, and the departure value is used to indicate that the signal marker 1 is far away from the signal identification component 2.

[0072] Specifically, for each inductive sensor, the complex impedance when the vehicle is powered on and the seatbelt buckle is not engaged is used as the reference impedance. Where R0 is the reference resistor, ω0 is the reference frequency, and L0 is the reference inductance, then when the seatbelt latch inserts into the buckle, triggering the seatbelt buckle engagement event, the complex impedance output by the inductive sensor at the time of seatbelt buckle engagement is used as the current impedance. Where R1 is the current resistance, ω1 is the current frequency, and L1 is the current inductance, the magnitude of the difference between the current impedance and the reference impedance is calculated as follows: , where |ΔZ| is the magnitude of the impedance change.

[0073] Since the signal marker is made of conductive metal, the impedance change magnitude increases significantly when the conductive metal is close to the signal recognition component, while the impedance change magnitude is very small, almost zero, when the conductive metal is far away from the signal recognition component. Therefore, an experiment can be conducted to calibrate a magnitude threshold. By comparing the magnitude of the impedance change with the magnitude threshold, it can be determined whether the conductive metal, acting as the signal marker, is close to the signal recognition component, thereby determining the corresponding judgment value. The value of the position of the recognition signal in the position encoding is then set as the judgment value.

[0074] Specifically, as an example, signal marker 1 includes: a first signal marker 11 disposed on the seat belt shoulder strap 41, a second signal marker 12 disposed on the seat belt shoulder strap 41, and a third signal marker 13 disposed on the seat belt lap belt 42; signal recognition component 2 includes: a first signal recognition component 21 disposed on the seat side wing 51, a second signal recognition component 22 disposed on the seat back 52, and a third signal recognition component 23 disposed on the seat cushion 53. The position code is three digits, with the first digit corresponding to the first signal recognition component 21, the second digit corresponding to the second signal recognition component 22, and the third digit corresponding to the third signal recognition component 23.

[0075] Using 0 as the distance value and 1 as the arrival value, when the conductive metal of the seat belt webbing 4 is far away from the inductive sensor, the controller calculates a small impedance change magnitude based on the impedance signal identified by the sensor, which is lower than the preset threshold, and the corresponding judgment value is the distance value 0; when the conductive metal material is close to the inductive sensor, the impedance change magnitude calculated based on the impedance signal identified by the sensor is large, which is higher than the preset threshold, and the corresponding judgment value is the arrival value 1.

[0076] Therefore, when the first signal marker 11 and the second signal marker 12 are close to the first signal recognition component 21 and the second signal recognition component 22 respectively, the impedance change magnitude calculated based on the impedance signals output by the first signal recognition component 21 and the second signal recognition component 22 increases, and the corresponding judgment values ​​are all 1. When the third signal marker 13 is far away from the third signal recognition component 23, the impedance change magnitude calculated based on the impedance signal output by the third signal recognition component 23 decreases, and the judgment value is 0. At this time, the position code is 110, which can be identified as the normal wearing path of the back of the shoulder strap and waist belt, and is judged as an incorrect wearing state. When the first signal marker 11 and the second signal marker 12 move away from the first signal recognition component 21 and the second signal recognition component 22 respectively, the impedance change magnitude calculated based on the impedance signals output by the first signal recognition component 21 and the second signal recognition component 22 decreases, and the corresponding judgment values ​​are all 0. When the third signal marker 13 moves closer to the third signal recognition component 23, the impedance change magnitude calculated based on the impedance signal output by the third signal recognition component 23 increases, and the corresponding judgment value is 1. At this time, the position code is 001, which can be identified as the correct wearing path of the shoulder strap behind the waist belt, and is judged as an incorrect wearing state. When the first signal marker 11 approaches the first signal recognition component 21, the impedance change magnitude calculated based on the impedance signal output by the first signal recognition component 21 increases, and the corresponding judgment value is 1. When the second signal marker 12 and the third signal marker 13 move away from the second signal recognition component 22 and the third signal recognition component 23, the impedance change magnitude calculated based on the impedance signals output by the second signal recognition component 22 and the third signal recognition component 23 decreases, and the corresponding judgment values ​​are all 0. At this time, the position code is 100, which can be identified as the underarm wearing path of the shoulder strap, and is judged as an incorrect wearing state. When the first signal marker 11 and the second signal marker 12 approach the first signal recognition component 21 and the second signal recognition component 22 respectively, the impedance change magnitude calculated based on the impedance signals output by the first signal recognition component 21 and the second signal recognition component 22 increases, and the corresponding judgment value is 1. When the third signal marker 13 approaches the third signal recognition component 23, the impedance change magnitude calculated based on the impedance signal output by the third signal recognition component 23 increases, and the corresponding judgment value is 1. At this time, the position code is 111, which can be identified as the wearing path of the shoulder strap and waist belt behind the back, and is judged as an incorrect wearing state. When the first signal marker 11, the second signal marker 12, and the third signal marker 13 move away from the first signal recognition component 21, the second signal recognition component 22, and the third signal recognition component 23, respectively, the impedance change magnitude calculated based on the impedance signals output by the first signal recognition component 21, the second signal recognition component 22, and the third signal recognition component 23 decreases, and the corresponding judgment values ​​are all 0. At this time, the position code is 000, which can be identified as the correct over-the-shoulder and over-the-chest wearing path of the shoulder strap and waist belt, and is judged as the correct wearing state. Therefore, the following signal combinations can be obtained to identify the corresponding wearing path;

[0077] This embodiment determines the judgment value through impedance signal and generates a corresponding position code, thereby quickly determining the wearing status.

[0078] In one embodiment, the signal marker 1 further includes a capacitor connected in parallel with the conductive metal, and the signal recognition component 2 is an element capable of recognizing changes in metal impedance and the resonant frequency of the LC circuit. The recognition signal also includes the resonant frequency. The step of setting the value of the recognition signal bit in the position code to an "on" value when the magnitude of the impedance change is greater than or equal to a magnitude threshold, and setting the value of the recognition signal bit in the position code to an "off" value when the magnitude of the impedance change is less than the corresponding magnitude threshold, includes: When the impedance change magnitude is greater than or equal to the magnitude threshold and the resonant frequency is within the corresponding frequency range, the value of the identification signal in the position code is set to the position value. When the impedance change magnitude is less than the corresponding magnitude threshold or the resonant frequency is outside the corresponding frequency range, the value of the identification signal in the position code is set to the departure value resonant frequency. The frequency range corresponds one-to-one with the signal identification component 2.

[0079] Specifically, signal marker 1 also includes a capacitor connected in parallel with the conductive metal. In this case, the conductive metal and capacitor form an LC circuit, or more specifically, an LC oscillation circuit. Signal marker 1 has a resonant frequency. The resonant frequencies of multiple LC circuits composed of different conductive metals and capacitors can be obtained by changing the material, size, and capacitance value of the conductive metals. For example, the first signal marker 11 has a frequency range of 600-900 kHz, the second signal marker 12 has a frequency range of 900 kHz-1.3 MHz, and the third signal marker 13 has a frequency range of 1.3-1.9 MHz. The identification signal output by signal recognition component 2 includes an impedance signal and a resonant frequency. Each signal marker 1 corresponds to one signal recognition component 2, and each signal recognition component 2 is associated with a frequency range, which is the frequency range of the resonant frequency of the signal marker 1 corresponding to the signal recognition component 2, determined in advance. When the signal recognition component 2 detects the signal marker 1 approaching, it can identify the resonant frequencies of different frequency bands, and then determine whether the identified resonant frequencies are within the corresponding frequency range, thereby avoiding the identification of signals from other signal markers approaching and preventing false detection.

[0080] Specifically, when the impedance change magnitude is greater than or equal to the magnitude threshold and the resonant frequency is within the corresponding frequency range, the judgment value is the position value and is a valid judgment value. Therefore, the value of the position of the identification signal in the position encoding is set to the position value.

[0081] When the magnitude of the impedance change is less than the corresponding magnitude threshold, the judgment value is the departure value, and the value of the position of the identification signal in the position encoding is set to the departure value.

[0082] When the impedance change magnitude is greater than or equal to the magnitude threshold, but the resonant frequency is outside the corresponding frequency range, the judgment value is the position value. However, the detected signal marker 1 is incorrect, so it is an invalid judgment value. The value of the position of the identification signal in the position encoding is set to the departure value.

[0083] This embodiment forms an LC oscillation circuit by arranging conductive metal and capacitor in parallel. The resonant frequency is used to identify the signal marker. Combined with the impedance signal identified by the inductive sensor, the system can accurately determine whether the corresponding signal marker is close, thereby improving the detection accuracy.

[0084] like Figure 6 The diagram shown is a flowchart of a vehicle seatbelt wearing status recognition method according to a preferred embodiment of the present invention, including: Step S601, driving begins; Step S602, seatbelt unfastened reminder detection; Step S603: Determine whether the seat belt is worn. If not, remind the user via SBR and end the process; otherwise, proceed to step S604. Step S604, seat belt path detection; Step S605: Determine whether the seat belt is in an incorrect wearing state. If so, trigger an audio-visual warning; otherwise, end the process.

[0085] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0086] like Figure 7 The diagram shown is a hardware structure schematic of an electronic device according to the present invention, comprising: At least one processor 701; and, A memory 702 is communicatively connected to at least one of the processors 701; wherein, The memory 702 stores instructions that are executed by at least one of the processors to enable the at least one processor to perform the vehicle seatbelt wearing status recognition method as described above.

[0087] Figure 7 Take the 701 processor as an example.

[0088] The electronic device may also include an input device 703 and a display device 704.

[0089] The processor 701, memory 702, input device 703 and display device 704 can be connected by a bus or other means. The figure shows an example of connection by a bus.

[0090] The memory 702, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the vehicle seatbelt wearing status recognition method in the embodiments of this application, for example, Figure 5 The method flow is shown. The processor 701 executes various functional applications and data processing by running non-volatile software programs, instructions, and modules stored in the memory 702, thereby realizing the vehicle seat belt wearing status recognition method in the above embodiment.

[0091] The memory 702 may include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function. The data storage area may store data created based on the use of the vehicle seatbelt wearing status recognition method. Furthermore, the memory 702 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 702 may optionally include memory remotely located relative to the processor 701, and these remote memories may be connected via a network to the apparatus performing the vehicle seatbelt wearing status recognition method. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0092] The input device 703 can receive user clicks and generate signal inputs related to user settings and function control of the vehicle seatbelt wearing status recognition method. The display device 704 may include a display screen or other display device.

[0093] When one or more modules are stored in the memory 702, and are run by one or more processors 701, the vehicle seat belt wearing status recognition method in any of the above method embodiments is executed.

[0094] This invention employs multi-position detection to identify various incorrect wearing paths, and through position coding, it can quickly determine the seat belt wearing status of the vehicle, thereby preventing occupants from wearing seat belts incorrectly and improving driving safety.

[0095] One embodiment of the present invention provides a storage medium that stores computer instructions, which, when executed by a computer, are used to perform all the steps of the vehicle seatbelt wearing status recognition method as described above.

[0096] In the context of this disclosure, a storage medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. The storage medium can be a machine-readable signal medium or a machine-readable storage medium. Optionally, the storage medium can be a non-transitory computer-readable storage medium, such as a ROM, random access memory (RAM), compact disc ROM (CD-ROM), magnetic tape, floppy disk, and optical data storage device.

[0097] One embodiment of the present invention provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the vehicle seat belt wearing status recognition method as described above.

[0098] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A vehicle seatbelt wearing status recognition device, characterized in that, include: Multiple signal markers (1), multiple signal recognition components (2), and a controller (3), wherein: The multiple signal markers (1) are respectively embedded in different positions of the seat belt webbing (4); Multiple signal recognition components (2) are disposed at different positions on the seat (5) to sense the magnetic field changes generated when the signal marker (1) passes by and output recognition signals; The controller (3) is communicatively connected to the signal recognition component (2) and identifies the seat belt wearing status based on the recognition signal output by the signal recognition component (2).

2. The vehicle seatbelt wearing status recognition device according to claim 1, characterized in that: The signal marker (1) includes: a first signal marker (11) disposed on the shoulder strap (41) of the seat belt, a second signal marker (12) disposed on the shoulder strap (41) of the seat belt, and a third signal marker (13) disposed on the waist belt (42). The signal recognition component (2) includes: a first signal recognition component (21) disposed on the side wing (51) of the seat, a second signal recognition component (22) disposed on the backrest (52) of the seat, and a third signal recognition component (23) disposed on the seat cushion (53).

3. The vehicle seatbelt wearing status recognition device according to claim 1, characterized in that, The signal marker (1) is a conductive metal, and the signal recognition component (2) is a component that can recognize the metal impedance.

4. The vehicle seatbelt wearing status recognition device according to claim 3, characterized in that, The signal marker (1) also includes a capacitor connected in parallel with the conductive metal, and the signal recognition component (2) is a component that can recognize the metal impedance and the resonant frequency of the LC circuit.

5. The vehicle seatbelt wearing status recognition device according to claim 4, characterized in that, Different signal markers (1) have different sizes of conductive metal, different materials of conductive metal, and / or different capacitance values ​​of capacitors.

6. A method for recognizing the wearing status of a vehicle seatbelt, characterized in that, The vehicle seatbelt wearing status recognition device as described in any one of claims 1 to 5 includes: In response to a seatbelt buckle engagement event, the identification signals output by multiple signal recognition components (2) are acquired; Location codes are generated based on multiple identification signals; The seatbelt wearing path is determined based on the location code; The seatbelt wearing status of the vehicle is determined based on the seatbelt wearing path.

7. The vehicle seatbelt wearing status recognition method according to claim 6, characterized in that, The signal marker (1) is a conductive metal, the signal recognition component (2) is an element capable of recognizing changes in metal impedance, the recognition signal includes an impedance signal, and the method further includes: The impedance signal in the identification signal of each signal identification component (2) before the seat belt buckle engagement event is used as the reference impedance corresponding to the signal identification component (2); The method of acquiring the identification signals output by multiple signal identification components (2) in response to the seat belt buckle engagement event includes: in response to the seat belt buckle engagement event, taking the impedance signal in the identification signal of each of the signal identification components (2) when the seat belt buckle is engaged as the current impedance; The generation of location codes based on multiple identification signals includes: The magnitude of the difference between the current impedance of each signal identification component (2) and the corresponding reference impedance number is calculated as the impedance change magnitude of each signal identification component (2), and the impedance change magnitude of each signal identification component (2) is compared with the magnitude threshold. When the impedance change magnitude is greater than or equal to the magnitude threshold, the value of the identification signal in the position code is set to the position value. When the impedance change magnitude is less than the corresponding magnitude threshold, the value of the identification signal in the position code is set to the departure value. The position value is used to indicate that the signal marker (1) is close to the signal identification component (2), and the departure value is used to indicate that the signal marker (1) is far away from the signal identification component (2).

8. The method for recognizing vehicle seatbelt wearing status according to claim 7, characterized in that, The signal marker (1) further includes a capacitor connected in parallel with the conductive metal. The signal recognition component (2) is an element capable of recognizing changes in metal impedance and the resonant frequency of the LC circuit. The recognition signal further includes the resonant frequency. When the magnitude of the impedance change is greater than or equal to the magnitude threshold, the value of the position of the recognition signal in the position code is set to the position value. When the magnitude of the impedance change is less than the corresponding magnitude threshold, the value of the position of the recognition signal in the position code is set to the departure value. When the impedance change magnitude is greater than or equal to the magnitude threshold and the resonant frequency is within the corresponding frequency range, the value of the identification signal in the position code is set to the position value. When the impedance change magnitude is less than the corresponding magnitude threshold or the resonant frequency is outside the corresponding frequency range, the value of the identification signal in the position code is set to the departure value resonant frequency. The frequency range corresponds one-to-one with the signal identification component (2).

9. An electronic device, characterized in that, include: At least one processor; as well as, A memory communicatively connected to at least one of the processors; wherein, The memory stores instructions that are executed by at least one of the processors to enable the at least one of the processors to perform the vehicle seatbelt wearing status recognition method as described in any one of claims 6 to 8.

10. A storage medium, characterized in that, The storage medium stores computer instructions, which, when executed by the computer, are used to perform all the steps of the vehicle seatbelt wearing status recognition method as described in any one of claims 6 to 8.

11. A computer program product, comprising a computer program / instructions, characterized in that, When the computer program / instruction is executed by the processor, it implements the vehicle seat belt wearing status recognition method as described in any one of claims 6 to 8.

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