CN114633718A - Safety belt detection system based on sensing device - Google Patents
Safety belt detection system based on sensing device Download PDFInfo
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- CN114633718A CN114633718A CN202011473524.4A CN202011473524A CN114633718A CN 114633718 A CN114633718 A CN 114633718A CN 202011473524 A CN202011473524 A CN 202011473524A CN 114633718 A CN114633718 A CN 114633718A
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- seat belt
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- 238000001514 detection method Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/48—Control systems, alarms, or interlock systems, for the correct application of the belt or harness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/48—Control systems, alarms, or interlock systems, for the correct application of the belt or harness
- B60R2022/4808—Sensing means arrangements therefor
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
A sensing device based seat belt detection system comprising: the sensing-sensitive part is arranged on a safety belt sleeve, and the safety belt sleeve comprises a safety belt and a limiting device for fixing the safety belt; a sensing device configured to: sensing whether a driver and/or an occupant are present in the vehicle; sensing the sense-sensitive portion; a processor, coupled with the sensing device, configured to: based on the recognition of the state of the sense-sensitive portion, it is determined whether the driver and/or the occupant is belted. The system is convenient to install and maintain, and the deployment cost is reduced.
Description
Technical Field
The present invention relates to a seat belt detection system, and more particularly, to a sensing device based seat belt detection system.
Background
The seat belt detection system can determine whether to emit a warning sound or a safety warning by detecting whether a driver or a passenger in the vehicle has properly fastened a seat belt. According to one prior art, the function of reminding that the seat belt is not fastened is realized by triggering a switch by the seat belt of the driver seat. After the automobile is started, the trigger switch in the safety belt lock catch is in a default state of an opening state, and the reminding device can send out a reminding sound to remind a driver to fasten the safety belt. After the driver fastens the safety belt, the trigger switch in the safety belt lock catch is switched off, and the prompt sound is not sent out.
The detection method needs to arrange a plurality of trigger switches and trigger circuits corresponding to the safety belts in the vehicle respectively, and certain hardware cost is occupied. When any trigger switch fails, the safety belt unfastening prompt tone can be continuously sounded, which brings a bad use experience to users.
Disclosure of Invention
The object of the present invention is to provide a seat belt detection system which differs from the prior art described above.
To this end, according to one aspect of the present invention, there is provided a sensing device based seat belt detection system comprising: the sensing-sensing part is arranged on a safety belt kit, and the safety belt kit comprises a safety belt and a limiting device for fixing the safety belt; a sensing device configured to: sensing whether a driver and/or an occupant are present in the vehicle; sensing the sense-sensitive portion; a processor, coupled with the sensing device, configured to: based on the recognition of the state of the sense-sensitive portion, it is determined whether the driver and/or the occupant is belted.
Optionally, the sensing-sensitive portion comprises an infrared reflective material coated on the seat belt and the sensing device comprises an infrared sensor or a color pattern sensor.
Optionally, the sensing-sensitive portion comprises an infrared reflective material coated over at least a portion of the spacing device, and the sensing device comprises an infrared sensor or a color pattern sensor.
Optionally, the sensing-sensitive portion comprises a fluorescent buckle attachable to the seat belt, and the sensing device comprises a color pattern sensor.
Optionally, the sensing device comprises a first sensing unit configured to scan the driver's seat and/or the passenger's seat to determine whether a driver and/or a passenger is present in the vehicle; and a second sensing unit configured to scan a range of motion of the seat belt to determine a state of the sense-sensitive portion.
Optionally, the detection system further comprises a microcontroller coupled with the processor and configured to generate a control command or a safety alert based on a determination that the driver and/or the occupant is not wearing the seat belt.
According to another aspect of the present invention, there is provided a sensing device based seat belt detection method, comprising: detecting whether a driver and/or an occupant is present in the vehicle using a sensing device; detecting the state of a sensing-sensitive part arranged on the safety belt sleeve by using a sensing device; the safety belt kit comprises a safety belt and a limiting device for fixing the safety belt; based on the detection of the state of the sense-sensitive portion, a control command or safety alert is generated upon a determination that the driver and/or occupant is not wearing the seatbelt.
Optionally, the method further comprises adjusting the infrared sensor or the color pattern sensor to a first sensing angle to scan the driver seat and/or the passenger seat; and adjusting the infrared sensor or the color pattern sensor to a second sensing angle so as to scan the moving range of the safety belt.
The invention provides a safety belt detection system based on a camera device, which can accurately detect whether a driver or a passenger fastens a safety belt or not by multiplexing the camera device in a vehicle under the condition of not using a trigger switch and a trigger circuit. The system is convenient to install and maintain, reduces the deployment cost and is convenient to popularize and apply in the industry.
Drawings
Fig. 1 shows a schematic block diagram of a sensing device based seat belt detection system according to an embodiment of the present invention.
Fig. 2 shows a flow diagram of a sensing device based seat belt detection method according to an embodiment of the invention.
Detailed Description
In the following description specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that embodiments of the invention may be practiced without these specific details. In the present invention, specific numerical references such as "first detecting unit", "second detecting unit", and the like may be made. But the specific numerical references should not be understood as necessarily obeying their literal order, but rather should be understood as "the first detection unit" being different from "the second detection unit".
The specific details set forth are exemplary and may be varied while remaining within the spirit and scope of the invention. The term "coupled" is defined to mean either directly connected to a component or indirectly connected to the component via another component.
Preferred embodiments of a system or apparatus suitable for implementing the invention are described below with reference to the accompanying drawings. Although embodiments are described with respect to a single combination of elements, it is to be understood that the invention includes all possible combinations of the disclosed elements. Thus, if one embodiment includes elements A, B and C, while a second embodiment includes elements B and D, the invention should also be considered to include A, B, C or the other remaining combinations of D, even if not explicitly disclosed.
According to one embodiment of the present invention, a sensing device based seat belt detection system 10 is provided, as shown in fig. 1, which includes a sensing-sensitive portion 102 disposed on a seat belt package 20, wherein the seat belt package 20 is disposed adjacent to a driver's seat and/or a passenger's seat of a vehicle. The harness assembly 20 includes a harness and a retaining device for securing the harness, which may be a latch, a catch, or other securing location. The seat belt detection system 10 also includes a sensing device 106, a processor 110, and an optional microcontroller 114, coupled/connected as also shown in fig. 1.
Where sensing device 106 is configured to sense whether a driver and/or occupant is present within the vehicle, sensing device 106 may also be used to sense the sense-sensitive portion to determine the image area in which it is located. In this way, the sensing device 106 has two detection functions, so that the multiplexing of hardware resources is realized, other sensing devices do not need to be additionally arranged, and the hardware cost is saved. Such a sensing device can replace the multiple trigger switches and trigger circuits associated with conventional occupant and seat belts, and can be easily installed and serviced. In some embodiments of the present invention, the sensing device 106 is implemented using an infrared sensor or a color pattern sensor that captures video images of the interior of the vehicle and is adapted to locate highlights, infrared reflections or fluorescence features in the images. Specifically, in one aspect, the sensing device 106 scans the driver's seat and the passenger's seat to determine whether a driver or passenger is seated in the vehicle; on the other hand, it scans the movable range (extendable range) of the seat belt to find an image area where the sense-sensitive portion is located. Optionally, the sensing device 106 includes two sensing units, which respectively implement sensing of the seat and sensing of the moving range of the seat belt, and the two sensing units respectively employ independent lenses to capture video images for different angles, independently of each other.
The sensing-sensitive portion 102 cooperates with the sensing device 106 to increase the speed of recognizing the sensing-sensitive portion 102, avoid interference of background objects with the recognition, and further facilitate detection and determination of whether the seat belt is fastened by the sensing device 106 and the processor 110. For this reason, the sense-sensitive part 102 is provided with a clearly identifiable feature, so that the sensing device 106 can quickly find out the image area where the sense-sensitive part 102 is located from the video image. In some embodiments of the present invention, the sense-sensitive portion 102 comprises an infrared reflective material coated on the seat belt. Alternatively, the sense-sensitive portion 102 may be an infrared reflective segment coated over a portion of a seatbelt retention device (e.g., a buckle) that is embedded within the buckle and not visible after the seatbelt is buckled into the buckle. In other embodiments, sense-sensitive portion 102 may comprise a fluorescent clasp attached to a safety belt. As an example, the sense-sensitive portion 102 can include multiple states, such as a sensible state, a seated/embedded state, and an occluded state. The sensible status indicates that the sense-and-sense portion 102 is sensible by the sensing device 106, the seated/embedded status indicates that it is secured to the spacing device, and the occluded status indicates that it is temporarily occluded by the background object. Generally, the sense-and-sense portion 102 is in the seated/embedded state, indicating that the driver or occupant has fastened the seat belt.
The processor 110 is coupled to the sensing device 106 and is configured to determine whether the driver and the occupant are belted based on the identification of the state of the sense-sensitive portion 102. In some embodiments of the present invention, the processor 110 is integrated with the sensing device 106. In other embodiments, the two are coupled but operate independently of each other. The processor 110 may implement various image processing algorithms to extract features of a region of interest therein, i.e., corresponding to the sense-sensitive portion 102, based on analysis of the video images captured by the sensing device 106. Features of the region of interest include image color, brightness, contrast, sharpness, texture, pattern and other identifiable image features. Correspondingly, the sense-sensitivity 102 may have a particular color, have reflective characteristics, have particular textural characteristics, or pattern characteristics. By way of example, the sense-sensitivity 102 employs a defined pattern that includes crosses, bars, slashes, circles, dots, and the like. Defining a pattern may further improve the identifiability of the sense-sensitivity 102.
According to one embodiment of the invention, the sense-sensitive portion 102 is an infrared reflective segment coated on the seat belt and has a defined cross pattern. The processor 110 finds that the ir reflecting segment in the first five images is moving and the ir reflecting segment in the last five images is stationary and close to the seat belt restraint (e.g., buckle), and the processor 110 can determine that the driver has properly fastened the seat belt. According to another embodiment, the sense-and-sense part 102 is a buckle with a fluorescent part provided at the end of the seat belt (or attached thereto), and once it is buckled into the stopper (notch) of the seat belt, the fluorescent part on the buckle is not visible, whereby the processor 110 determines that the driver or occupant has fastened the seat belt.
The microcontroller 114, as an optional component of the seat belt detection system 10, is coupled to the processor 110 and is configured to generate control commands or safety reminders based on a determination that the driver and/or occupant is not wearing a seat belt. The microcontroller 114 is connected to other components of the vehicle by using an in-vehicle bus, and generates corresponding control instructions according to the instructions of the processor, so as to limit the driving behavior of the driver until the driver and the passenger are properly fastened with a safety belt, or send out safety warnings, such as voice warning and vibration warning. As an example, when microcontroller 114 knows from processor 110 that the driver is not wearing a seat belt, the microcontroller generates a control command to lock the accelerator pedal of the vehicle to limit vehicle acceleration, and at the same time, the microcontroller controls the generation of a warning tone to inform the driver to wear the seat belt as soon as possible.
The seat belt detection system 10 may also be capable of performing a real-time self-check, after which a camera in the vehicle is operated in real time to detect whether a driver and/or a passenger is present in the vehicle, and to detect the status of a sensing-sensitive portion provided on the seat belt assembly to determine whether the driver and the passenger are wearing the seat belt. And when detecting that the driver or the passenger does not fasten the safety belt, starting the safety belt unfastening reminding function.
The safety belt detection system 10 can be mounted on a ceiling in a vehicle and connected with a control unit in the vehicle in a wireless communication mode, and can detect whether a person in the vehicle fastens a safety belt or not by acquiring and analyzing video images without additionally arranging a trigger switch and a trigger circuit corresponding to each safety belt. In the case where a surveillance video unit is already in the vehicle, the seat belt detection system 10 may directly multiplex the video unit and acquire video images therefrom to determine whether the seat belt is fastened. The system is convenient to install and maintain and low in deployment cost.
Another embodiment of the present invention provides a sensing device based seat belt detection method, and fig. 2 shows a flow chart of such a method. As shown in fig. 2, the seat belt detection method includes the following steps S20-S22-S24. It should be noted that the steps can be executed in different orders, can be combined with each other, or can be divided into a plurality of sub-steps without affecting the technical effect of the present invention. As one example, step S22 may be performed first, with step S20 performed subsequently. As another example, step S22 is split into two sub-steps, a first sub-step in which the image region of the sense-sensitive portion corresponding in the video image is found, and a second sub-step in which the state of the sense-sensitive portion is identified.
Step S20: sensing devices are utilized to detect whether a driver and/or an occupant is present in the vehicle.
Step S22: the state of a sensing-sensitive part arranged on the safety belt sleeve is detected by using the sensing device.
Step S24: based on the detection of the state of the sense-sensitive portion, a control command or safety alert is generated upon a determination that the driver and/or occupant is not wearing the seatbelt.
The sensing-sensitive portion may be an infrared reflective material (segment) coated on the seat belt, an infrared reflective segment disposed on the seat belt restraint, a fluorescent or infrared clasp removably attached to the seat belt, or the like. By configuring the sensing-sensitive portion, the sensing device can achieve good recognition performance for the sensing-sensitive portion, avoiding interference of background objects (including drivers) or noise with recognition. The sensing device determines a region of interest from the captured video image that corresponds to the sense-sensitive portion. Through the identification or analysis of the region of interest, whether the safety belt is in a limiting state can be judged, for example, the safety belt is fixedly connected to a safety belt limiting device, and then a driver can be determined that the safety belt is fastened. Step S22 may be executed cyclically and periodically during the running of the vehicle to detect the state of the seat belt in real time.
In some improved embodiments, the steps S20 and S22 are implemented by an infrared camera (in-vehicle monitoring) device configured with a single adjusting device (or cradle head), and the camera device can implement two detection functions by adjusting the sensing angle thereof, thereby implementing hardware resource reuse. Specifically, first, the image pickup device is adjusted to a first sensing angle to scan the driver seat and the passenger seat. And then, adjusting the camera device to a second sensing angle so as to scan the moving range of the safety belt.
There is also provided, in accordance with some embodiments of the present invention, a machine-readable storage medium having stored thereon a collection of computer-executable instructions that, when executed by a processor, may implement the sensing device-based seatbelt detection method described above.
Those of skill in the art will appreciate that the various illustrative logical blocks, modules, and circuits described in connection with the aspects disclosed herein may be implemented as electronic devices, or combinations of modules. Various illustrative components, blocks, modules, circuits, and structures have been described above generally in terms of their functionality. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Various modifications may be made by those skilled in the art without departing from the spirit of the invention and the appended claims.
Claims (11)
1. A sensing device based seat belt detection system comprising:
the sensing-sensitive part is arranged on a safety belt kit, and the safety belt kit comprises a safety belt and a limiting device for fixing the safety belt;
a sensing device configured to:
sensing whether a driver and/or an occupant are present in the vehicle;
sensing the sense-sensitive portion;
a processor, coupled with the sensing device, configured to:
determining whether the driver and/or the occupant is belted based on the identification of the state of the sense-sensitive portion.
2. The seat belt detection system of claim 1, wherein the sense-and-sense portion comprises an infrared reflective material applied to the seat belt, and the sensing device comprises an infrared sensor or a color pattern sensor.
3. The seat belt detection system of claim 1, wherein the sense-and-sense portion comprises an infrared reflective material coated over at least a portion of the restraint device, and the sensing device comprises an infrared sensor or a color pattern sensor.
4. The seat belt detection system of claim 1, wherein the sense-and-sense portion comprises a fluorescent buckle attachable to the seat belt, and the sensing device comprises a color pattern sensor.
5. The seat belt detection system of claim 1, wherein the sensing device comprises:
a first sensing unit configured to scan the driver seat and/or the passenger seat to determine whether a driver and/or a passenger is present in the vehicle; and
a second sensing unit configured to scan a range of motion of the seat belt to determine a state of the sense-sensitive portion.
6. The seat belt detection system of claim 1, further comprising:
a microcontroller coupled with the processor and configured to:
generating a control command or a safety reminder based on a determination that the driver and/or the occupant is not wearing the seat belt.
7. The seat belt detection system of claim 6, the microcontroller configured to perform at least one of the following based on a determination that the driver and/or the occupant is not wearing the seat belt:
generating the control command to lock an accelerator pedal of the vehicle;
generating the safety reminder to alert the driver and/or the occupant.
8. The seat belt detection system of any one of claims 1 to 7, wherein the sense-and-sense portion employs a defined pattern comprising at least one of:
a cross; horizontal bars; a slash; a circle; point-like.
9. A sensing device based seat belt detection method comprising:
detecting with the sensing device whether a driver and/or an occupant is present in the vehicle;
detecting a state of a sensing-sensitive portion provided on the seatbelt set using the sensing device; the safety belt kit comprises a safety belt and a limiting device for fixing the safety belt;
based on the detection of the state of the sense-sensitive portion, generating a control command or a safety alert when it is determined that the driver and/or the occupant is not wearing the seat belt.
10. The method of claim 9, wherein the sensing device comprises an infrared sensor or a color pattern sensor, the method further comprising:
adjusting the infrared sensor or color pattern sensor to a first sensing angle to scan the driver seat and/or the passenger seat;
and adjusting the infrared sensor or the color pattern sensor to a second sensing angle so as to scan the moving range of the safety belt.
11. A machine-readable storage medium having stored thereon a collection of computer-executable instructions which, when executed by a processor, implement the method of claim 9 or 10.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011473524.4A CN114633718A (en) | 2020-12-15 | 2020-12-15 | Safety belt detection system based on sensing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011473524.4A CN114633718A (en) | 2020-12-15 | 2020-12-15 | Safety belt detection system based on sensing device |
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| CN114633718A true CN114633718A (en) | 2022-06-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105730392A (en) * | 2016-04-05 | 2016-07-06 | 上海汽车集团股份有限公司 | Reminding system and method for non-wearing of safety belt |
| JP2018118671A (en) * | 2017-01-26 | 2018-08-02 | アイシン精機株式会社 | Occupant monitoring device |
| JP2020006780A (en) * | 2018-07-06 | 2020-01-16 | パナソニックＩｐマネジメント株式会社 | Identification device, identification method, identification program, and non-transitory tangible recording medium recording identification program |
| DE102018122481A1 (en) * | 2018-09-14 | 2020-03-19 | Valeo Schalter Und Sensoren Gmbh | Method for determining the wearing status of a seat belt, and safety device for a vehicle |
| CN111422160A (en) * | 2020-05-23 | 2020-07-17 | 鲁法刚 | Automobile safety belt unbuckling reminding system integrated on safety belt lock catch |
| US20200298794A1 (en) * | 2019-03-18 | 2020-09-24 | Pony.ai, Inc. | Vehicle seat belt monitoring |
-
2020
- 2020-12-15 CN CN202011473524.4A patent/CN114633718A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105730392A (en) * | 2016-04-05 | 2016-07-06 | 上海汽车集团股份有限公司 | Reminding system and method for non-wearing of safety belt |
| JP2018118671A (en) * | 2017-01-26 | 2018-08-02 | アイシン精機株式会社 | Occupant monitoring device |
| JP2020006780A (en) * | 2018-07-06 | 2020-01-16 | パナソニックＩｐマネジメント株式会社 | Identification device, identification method, identification program, and non-transitory tangible recording medium recording identification program |
| DE102018122481A1 (en) * | 2018-09-14 | 2020-03-19 | Valeo Schalter Und Sensoren Gmbh | Method for determining the wearing status of a seat belt, and safety device for a vehicle |
| US20200298794A1 (en) * | 2019-03-18 | 2020-09-24 | Pony.ai, Inc. | Vehicle seat belt monitoring |
| CN111422160A (en) * | 2020-05-23 | 2020-07-17 | 鲁法刚 | Automobile safety belt unbuckling reminding system integrated on safety belt lock catch |
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