Safety belt system, vehicle, reminding method and control method

Abstract

The invention relates to the technical field of safety belt control, in particular to a safety belt system, a vehicle, a reminding method and a control method.The system comprises a safety belt assembly and an alarm system; the deceleration sensor is used for collecting the deceleration of the vehicle; the recognition assembly is used for acquiring the image of the passenger in the vehicle and the weight data of the passenger, recognizing the body type data of the passenger according to the image of the passenger, recognizing the safety belt wearing result of the passenger according to the image of the passenger, and controlling the alarm system to generate correct wearing reminding information when the safety wearing result is a preset error result; and the safety belt controller is used for determining the explosion moment of the safety belt assembly according to the deceleration and the passenger body type data when the vehicle collision is determined according to the deceleration, determining the action threshold value of the safety belt assembly according to the passenger body type data, and controlling the safety belt assembly according to the explosion moment and the action threshold value. Therefore, the problems that in the related control technology, safety belt control parameters are unified, the protection effect is poor, and secondary damage is likely to be caused are solved.

Description

Technical Field

[0001] This application relates to the field of seat belt control technology, and in particular to a seat belt system, vehicle, reminder method, and control method. Background Technology

[0002] Car seat belts are crucial passive safety components, serving to restrain occupant movement and provide cushioning. However, related technologies have limited ability to effectively identify and intervene in cases where occupants are not wearing seat belts or are falsely wearing them, increasing the risk of strangulation and other serious injuries in accidents. Furthermore, seat belt control technologies are poorly adapted to the protection needs of occupants of different body types, potentially failing to protect some occupants or even causing severe injury. Summary of the Invention

[0003] This application provides a seat belt system, a vehicle, a reminder method, and a control method to solve problems such as the lack of uniformity in seat belt control parameters in related control technologies, which leads to poor protective effects and easy secondary injuries.

[0004] The first aspect of this application provides a seat belt system, including: a seat belt assembly and an alarm system; a deceleration sensor for collecting the deceleration of a vehicle; an identification component for acquiring occupant images and occupant weight data inside the vehicle, identifying occupant body shape data based on the occupant images and weight data, identifying the occupant's seat belt wearing result based on the occupant images, and controlling the alarm system to generate a first correct wearing reminder message when the seat belt wearing result is a preset error result; and a seat belt controller for determining the moment when a collision occurs based on the deceleration, determining the moment of ignition of the seat belt assembly based on the deceleration and occupant body shape data, determining the action threshold of the seat belt assembly based on the occupant body shape data, and controlling the seat belt assembly based on the moment of ignition and the action threshold.

[0005] According to one embodiment of this application, the seat belt assembly includes a latch, a buckle, a webbing, a height adjuster, a force sensor, and a retractor. The buckle is fixed to the seat, and the latch inserts into the buckle when the occupant is properly wearing the seat belt. The webbing is used to restrain the occupant to the seat. The height adjuster controls the position of the seat belt. The force sensor is located on the webbing and is used to obtain the occupant's shoulder strap force and lap belt force. The retractor is used to tighten and loosen the seat belt.

[0006] According to one embodiment of this application, the retractor includes a retracting device and a hydraulic device. The retracting device is used to tighten and loosen the seat belt, and the hydraulic device provides power to the retracting device in response to control commands from the seat belt controller.

[0007] According to one embodiment of this application, the hydraulic device includes a first chamber, a second chamber, a third chamber, a fourth chamber, a fifth chamber, a first valve, a second valve, a third valve, a piston, and a crank-connecting rod mechanism. When the occupant correctly wears the seatbelt, hydraulic oil in the first chamber is injected into the third chamber through the second valve, and the piston compresses the nitrogen gas in the second chamber. When the seatbelt is pre-tensioned, hydraulic oil is injected into the fourth chamber through the third valve in the third chamber. The hydraulic oil in the fourth chamber pushes the crank-connecting rod mechanism and compresses the nitrogen gas in the fifth chamber. The crank-connecting rod mechanism is connected to a retraction device to pre-tension the seatbelt. The pre-tension force of the seatbelt is controlled by controlling the amount of hydraulic oil injected into the fourth chamber. When the seatbelt is relaxed, hydraulic oil is injected into the first chamber through the first valve in the fourth chamber. The nitrogen gas in the fifth chamber compresses the crank-connecting rod mechanism. The pre-tension force and limiting force of the seatbelt are controlled by controlling the amount of hydraulic oil injected into the first chamber.

[0008] According to one embodiment of this application, the action threshold includes a pretensioning threshold and a force limiting threshold. When the seat belt controller detects that the shoulder strap force and lap belt force have reached the pretensioning threshold, it controls the retractor to stop pretensioning the seat belt. When the seat belt controller detects that the shoulder strap force and lap belt force have reached the force limiting threshold, it controls the retractor to loosen the seat belt.

[0009] According to one embodiment of this application, the alarm system is connected to a force sensor on the seat belt. When the vehicle is not in a collision, if the shoulder belt force and lap belt force exceed a preset comfort threshold, a second correct wearing reminder message is generated to remind the occupant to wear the seat belt correctly by adjusting the height adjustment device.

[0010] According to one embodiment of this application, the identification component includes an image sensor, a weight sensor, and a processor. The image sensor acquires images of occupants inside the vehicle, the weight sensor acquires occupant weight data, the processor identifies occupant body shape data based on the occupant images and occupant weight data, identifies the occupant's seatbelt wearing result based on the occupant images, and controls the alarm system to generate a first correct wearing reminder message when the seatbelt wearing result is a preset error result.

[0011] A second aspect of this application provides a vehicle including the aforementioned seatbelt system.

[0012] A third aspect of this application provides a seatbelt system reminder method, applied to a seatbelt system recognition component, comprising the following steps: acquiring an image of an occupant inside a vehicle; recognizing the occupant's seatbelt wearing result based on the occupant image; and controlling an alarm system to generate a first correct wearing reminder message when the seatbelt wearing result is a preset error result.

[0013] The fourth aspect of this application provides a control method for a seat belt system, applied to a seat belt controller of the seat belt system, comprising the following steps: acquiring the vehicle's deceleration and occupant body shape data identified by a recognition component; determining the moment when a collision occurs based on the deceleration; determining the moment of ignition of the seat belt assembly based on the deceleration and the occupant body shape data; determining the action threshold of the seat belt assembly based on the occupant body shape data; and controlling the seat belt assembly based on the moment of ignition and the action threshold.

[0014] Therefore, this application has the following beneficial effects: The seatbelt system comprises a seatbelt assembly, an alarm system, a deceleration sensor, a recognition component, and a seatbelt controller. The deceleration sensor accurately captures vehicle deceleration data. The recognition component integrates occupant images and weight data to identify occupant body shape and determine seatbelt wearing status. It can also trigger the alarm system to generate an initial correct wearing reminder when incorrect wearing is detected. The seatbelt controller, based on vehicle deceleration and occupant body shape data, accurately determines the seatbelt deployment moment and action threshold, and implements corresponding control. Through multi-component collaboration, this system determines the seatbelt force limit based on occupant body shape, providing protection for occupants of all sizes. The seatbelt deployment moment is determined based on a combination of occupant body shape and collision intensity, similarly protecting occupants of all sizes. It also reminds occupants of different body shapes to wear the seatbelt correctly, preventing secondary injuries. This solves the problem of inconsistent seatbelt control parameters in related control technologies, which leads to poor protective effects and a higher risk of secondary injuries.

[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a block diagram of a seat belt system according to an embodiment of this application; Figure 2 A schematic diagram of a member wearing a seatbelt according to an embodiment of this application; Figure 3 This is a schematic diagram of a hydraulic device according to an embodiment of this application; Figure 4 This is a flowchart illustrating the seatbelt detonation process according to an embodiment of this application. Figure 5 This is a flowchart of a seatbelt reminder method according to an embodiment of this application; Figure 6 This is a flowchart of a control method for a seatbelt system according to an embodiment of this application; Figure 7 This is a flowchart of an embodiment of a control method for a seatbelt system according to an embodiment of this application. Detailed Implementation

[0017] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0018] The following description, with reference to the accompanying drawings, describes an embodiment of the seatbelt system, vehicle, reminder method, and control method of this application. Addressing the problem mentioned in the background art where standardized seatbelt control parameters lead to poor protective effects and a high risk of secondary injuries, this application provides a seatbelt system. The system includes a seatbelt assembly and an alarm system; a deceleration sensor for collecting vehicle deceleration; an identification component for acquiring occupant images and weight data, identifying occupant body shape data based on the occupant images and weight data, identifying the occupant's seatbelt wearing result based on the occupant image, and controlling the alarm system to generate a first correct wearing reminder message when the seatbelt wearing result is a preset error; and a seatbelt controller for determining the moment of impact when a collision occurs based on deceleration, determining the detonation time of the seatbelt assembly based on deceleration and occupant body shape data, determining the action threshold of the seatbelt assembly based on the occupant body shape data, and controlling the seatbelt assembly based on the detonation time and action threshold. This solves the problems of standardized seatbelt control parameters in related control technologies, which lead to poor protective effects and a high risk of secondary injuries.

[0019] Specifically, Figure 1 This is a block diagram of a seat belt system provided in an embodiment of this application.

[0020] like Figure 1 As shown, the seat belt system 10 includes: a seat belt assembly 110, an alarm system 120, a deceleration sensor 130, an identification component 140, and a seat belt controller 150.

[0021] The system includes a deceleration sensor 130 for collecting vehicle deceleration data; an identification component 140 for acquiring occupant images and weight data, identifying occupant body shape data based on the occupant images and weight data, identifying seatbelt wearing results based on the occupant images, and controlling the alarm system 120 to generate a first correct wearing reminder message when the seatbelt wearing result is a preset error; and a seatbelt controller 150 for determining the moment when a collision occurs based on deceleration, determining the activation time of the seatbelt assembly 110 based on deceleration and occupant body shape data, determining the action threshold of the seatbelt assembly 110 based on occupant body shape data, and controlling the seatbelt assembly 110 based on the activation time and action threshold.

[0022] Understandably, during normal vehicle operation, the seatbelt system 10 uses the recognition component 140 to collect images and weight data of the occupants inside the vehicle. This data is used to generate occupant body shape data and to identify the seatbelt wearing status. If the identification result indicates a preset incorrect wearing condition, the alarm system 120 is triggered to generate and output the first correct wearing reminder message. When a collision occurs during vehicle operation, the deceleration sensor 130 collects vehicle deceleration data in real time and transmits it to the seatbelt controller 150. The seatbelt controller 150 first determines that a collision has occurred based on the deceleration data, and then combines the collision intensity corresponding to the deceleration data with the acquired occupant body shape data to determine the triggering time and action threshold of the seatbelt assembly 110. The triggering time refers to the starting time when the seatbelt transitions from a normal relaxed state to rapid tightening, and the action threshold refers to the upper limit of pre-tensioning and force that the seatbelt components can achieve. Finally, according to the determined triggering time and action threshold, the seatbelt assembly 110 is controlled to perform corresponding protective actions, thereby achieving personalized and precise protection for occupants of different body shapes.

[0023] According to one embodiment of this application, the seat belt assembly 110 includes a latch 1101, a buckle 1102, a webbing 1103, a height adjuster 1104, a force sensor 1105, and a retractor 1106. The buckle 1102 is fixed to the seat, and the latch 1101 is inserted into the buckle 1102 when the occupant is wearing the seat belt correctly. The webbing 1103 is used to restrain the occupant to the seat. The height adjuster 1104 controls the position of the seat belt. The force sensor 1105 is located on the webbing 1106 and is used to obtain the shoulder strap force and lap belt force of the occupant. The retractor 1106 is used to tighten and loosen the seat belt.

[0024] Understandably, the buckle 1102 is fixed to the seat and works with the inserted locking tongue 1101 to lock the seat belt. The webbing 1103, as the force transmission carrier, directly restrains the occupant's body. The height adjuster 1104 can adjust the height of the webbing 1103 according to the occupant's body shape to improve wearing comfort and protective fit. The force sensor 1105 is integrated into the webbing 1103, which collects shoulder strap force and lap belt force data in real time and feeds it back to the seat belt controller 150. The retractor 1106 responds to the instructions of the seat belt controller 150. In normal conditions, it stores excess webbing 1103. During the collision protection phase, it completes the precise tightening and force limiting relaxation of the webbing 1103 according to the preset detonation time and action threshold. At the same time, the seat belt controller 150 can form a closed-loop control based on the feedback data of the force sensor 1105 and dynamically adjust the action parameters of the retractor 1106 to ensure that the protective force is adapted to the occupant's body shape and collision intensity. Each component has a clear division of labor and works in concert to not only provide basic restraint for occupants, but also to support the personalized protection of the entire seat belt system 10.

[0025] For example, such as Figure 2 The diagram illustrates how an occupant wears a seatbelt. After being seated, the occupant inserts the latch 1101 into the seat buckle 1102 to secure the seatbelt. The height of the webbing 1103 is adjusted using the height adjuster 1104 to fit the occupant's shoulders. The retractor 1106 automatically collects excess webbing 1103. The force sensor 1105 collects initial data on shoulder strap and lap belt forces in real time and feeds it back to the seatbelt controller 150. When a collision occurs, the seatbelt controller 150, combining deceleration data and occupant body shape data, initiates the protection program. At a preset detonation moment, it issues a pre-tensioning command to the retractor 1106, which quickly tightens the webbing 1103 to bring the occupant's body into contact with the seat back. During the protection process, the force sensor 1105 continuously monitors the tension changes of the webbing 1103 and feeds them back to the controller. When the tension reaches a preset threshold, the controller instructs the retractor 1106 to enter a force-limiting relaxation mode, stabilizing the tension of the webbing 1103 within a reasonable range to prevent pressure injury to the occupant.

[0026] According to one embodiment of this application, the retractor 1106 includes a retractor 210 and a hydraulic device 220. The retractor 210 is used to tighten and loosen the seat belt, and the hydraulic device 220 provides power to the retractor 210 in response to control commands from the seat belt controller 150.

[0027] It is understandable that the schematic diagram of hydraulic device 220 is as follows: Figure 3As shown, the hydraulic device 220 serves as the power core, responding to the commands of the seat belt controller 150. During the pre-tensioning phase, it rapidly establishes high pressure to drive the retractor 210 to quickly tighten the webbing 1103. During the force limiting phase, it controls the retractor 210 to smoothly relax the webbing by adjusting the internal pressure to maintain the webbing tension within a safe range. During the reset phase, it releases pressure so that the retractor 210 automatically retracts the webbing 1103. This not only achieves differentiated pre-tensioning protection for occupants of different body types, but also reduces the pressure injury to occupants during collision protection, accurately adapting to the personalized protection needs of the seat belt system 10.

[0028] For example, when a vehicle collision occurs, the seat belt controller 150 combines deceleration data and occupant body size data to issue a pretensioning command to the retractor 1106. The hydraulic device 220 in the retractor 1106 responds quickly, rapidly establishes high-pressure power and transmits it to the retractor 210. The retractor 210 then drives the webbing 1103 to tighten instantly, firmly pressing the occupant's body against the seat back, reducing forward displacement in the initial stage of the collision.

[0029] According to one embodiment of this application, the hydraulic device 220 includes a first chamber 2201, a second chamber 2202, a third chamber 2203, a fourth chamber 2204, a fifth chamber 2205, a first valve 2206, a second valve 2207, a third valve 2208, a piston 2209, and a crank-connecting rod mechanism 2210. When the occupant correctly wears the seatbelt, hydraulic oil in the first chamber 2201 is injected into the third chamber 2203 through the second valve 2207, and the piston 2209 compresses nitrogen gas in the second chamber 2202. When the seatbelt is pre-tensioned, hydraulic oil in the third chamber 2203 is injected into the fourth chamber 2205 through the third valve 2208. Hydraulic oil is injected into cavity 2204. The hydraulic oil in the fourth cavity 2204 pushes the crank-connecting rod mechanism 2210 and compresses the nitrogen in the fifth cavity 2205. The crank-connecting rod mechanism 2210 is connected to the retraction device to pretension the seat belt. The pretension force of the seat belt is controlled by controlling the amount of hydraulic oil injected into the fourth cavity 2204. When the seat belt is loosened, hydraulic oil is injected into the first cavity 2201 through the first valve 2206 from the fourth cavity 2204. The nitrogen in the fifth cavity 2205 compresses the crank-connecting rod mechanism 2210. The pretension force and limiting force of the seat belt are controlled by controlling the amount of hydraulic oil injected into the first cavity 2201.

[0030] Understandably, the hydraulic device 220 constructs a hydraulic control system for energy storage, power output, and pressure recovery through multi-chamber partitioning, precise valve control, and transmission design of piston 2209 and crank-connecting rod mechanism 2210. The advantages of this design are that the precise coordination of multiple chambers and valves enables independent adjustment of preload and limit force values, the energy storage and buffering characteristics of the dual nitrogen chambers improve the stability and response speed of power output, and the closed-loop oil circulation structure enhances the reliability and service life of the device, which can accurately adapt to the personalized protection needs of occupants of different body sizes.

[0031] For example, after the occupant correctly wears the seatbelt, hydraulic oil in the first chamber 2201 is injected into the third chamber 2203 through the second valve 2207, and the piston 2209 compresses the nitrogen in the second chamber 2202. When the seatbelt is pre-tensioned, hydraulic oil is injected into the fourth chamber 2204 through the third valve 2208 in the third chamber 2203. The hydraulic oil in the fourth chamber 2204 pushes the crank-connecting rod mechanism 2210 and compresses the nitrogen in the fifth chamber 2205. The crank-connecting rod mechanism 2210 is connected to the retraction device to pre-tension the seatbelt. The pre-tension force of the seatbelt is controlled by controlling the amount of hydraulic oil injected into the fourth chamber 2204. When the seatbelt is loosened, hydraulic oil is injected into the first chamber 2201 through the first valve 2206 in the fourth chamber 2204, and the nitrogen in the fifth chamber 2205 compresses the crank-connecting rod mechanism 2210. The pre-tension force of the seatbelt is controlled by controlling the amount of hydraulic oil injected into the first chamber 2201.

[0032] According to one embodiment of this application, the action threshold includes a pretensioning threshold and a force limiting threshold. When the seat belt controller 150 detects that the shoulder strap force and lap belt force have reached the pretensioning threshold, it controls the retractor 1106 to stop the seat belt pretensioning. When the seat belt controller 150 detects that the shoulder strap force and lap belt force have reached the force limiting threshold, it controls the retractor 1106 to loosen the seat belt.

[0033] Understandably, this application divides the action threshold of the seat belt assembly 110 into a pretension threshold and a force limiting threshold. The pretension threshold refers to the value corresponding to the upper limit of pretension that the shoulder force and the lap belt force can reach when the vehicle is involved in a collision; the force limiting threshold refers to the upper limit of the force that the shoulder force and the lap belt force can reach. The seat belt controller 150 uses the shoulder strap force and waist belt force collected by the force sensor 1105 as the basis for judgment. During the collision pretensioning phase, when the shoulder strap force and waist belt force reach the pretensioning threshold simultaneously, the controller 150 immediately instructs the retractor 1106 to terminate the webbing tightening action to avoid excessive pretension causing pressure injury to the occupant. During subsequent collisions, if the tension of the webbing 1103 continues to rise, causing the shoulder strap force and waist belt force to further reach the force limiting threshold, the controller 150 instructs the retractor 1106 to start the force limiting relaxation program to stabilize the tension of the webbing 1103 within the safe range. This dual-threshold layered control design not only achieves personalized protection parameter matching for occupants of different body types, but also improves the accuracy and reliability of protection through dual safety safeguards.

[0034] For example, the seat belt controller 150 pre-sets the corresponding pretensioning threshold and force limiting threshold based on the occupant body shape data acquired by the recognition component 140. After a collision, the retractor 1106 drives the webbing 1103 to begin pretensioning. The force sensor 1105 collects the shoulder strap force and waist belt force in real time and feeds them back to the seat belt controller 150. When the two force values ​​reach the pretensioning threshold simultaneously, the controller 150 immediately instructs the retractor 1106 to stop tightening the webbing 1103 to prevent excessive pretension from compressing the occupant's body. As the impact force continues to act, the occupant's body moves forward, causing the tension of the webbing 1103 to increase further. When the shoulder strap force and waist belt force continue to rise to the force limiting threshold, the controller 150 then instructs the retractor 1106 to start the force limiting relaxation program. The hydraulic device 220 adjusts the tension of the webbing 1103 to avoid excessive tension causing injury to the occupant's chest, waist, and other parts until the impact force dissipates, completing full-process protection.

[0035] According to one embodiment of this application, the alarm system 120 is connected to the force sensor 1105 on the seat belt. When the vehicle is not in a collision, if the shoulder belt force and lap belt force exceed a preset comfort threshold, a second correct wearing reminder message is generated to remind the occupant to wear the seat belt correctly by adjusting the height adjustment device.

[0036] Understandably, the alarm system 120 is linked with the force sensor 1105 on the seat belt. During normal driving when the vehicle is not in a collision, it monitors the changes in shoulder strap force and lap belt force in real time based on a preset comfort threshold. When the shoulder strap force and lap belt force exceed the comfort threshold, the alarm system 120 immediately generates a second correct wearing reminder message, clearly prompting the occupant to optimize the seat belt wearing position by adjusting the height adjustment device 1104. This design improves the occupant wearing comfort without increasing costs by reusing the existing force sensor 1105 hardware and providing precise adjustment guidance. At the same time, it avoids the potential risk of additional pressure injury during a collision due to wearing the seat belt too tightly during daily use.

[0037] For example, during vehicle operation, the force sensor 1105 connected to the alarm system 120 continuously monitors the shoulder strap force and waist belt force. Due to improper positioning of the height adjuster 1104, the webbing 1103 is too tight, causing the collected force value to exceed the preset comfort threshold. At this time, the alarm system 120 immediately generates a second correct wearing reminder message, prompting the occupant to adjust the height adjuster 1104. The occupant operates the height adjuster 1104 according to the reminder to change the height of the webbing 1103. The pressure of the webbing 1103 on the shoulders and waist is reduced, the force value collected by the force sensor 1105 drops back to the comfort threshold range, and the alarm system 120 stops reminding.

[0038] According to one embodiment of this application, the identification component 140 includes an image sensor, a weight sensor, and a processor. The image sensor acquires images of occupants inside the vehicle, the weight sensor acquires occupant weight data, the processor identifies occupant body shape data based on the occupant images and occupant weight data, and identifies the occupant's seatbelt wearing result based on the occupant images. When the seatbelt wearing result is a preset error result, the alarm system 120 is controlled to generate a first correct wearing reminder message.

[0039] It is understood that the recognition component 140 of this application consists of an image sensor, a weight sensor, and a processor, and adopts a recognition architecture of multi-sensor data fusion. The image sensor collects occupant images, the weight sensor collects occupant weight data, and the processor, on the one hand, fuses and analyzes the occupant images and weight data to generate accurate occupant body shape data, providing a basis for setting personalized protection parameters of the seat belt system 10. On the other hand, it judges the seat belt wearing status by recognizing the occupant image. When it is determined to be a preset incorrect wearing situation, it controls the alarm system 120 to generate the first correct wearing reminder information. This design improves the accuracy of body shape recognition and wearing status determination through dual-sensor collaboration.

[0040] For example, an image sensor captures images of the occupants' appearance inside the vehicle, while a weight sensor simultaneously collects their weight data. After both types of data are transmitted to the processor, the processor fuses and analyzes the body contours and weight data in the images to generate corresponding occupant body shape data. This data will be used for the subsequent personalized setting of seat belt pretension and force limiting thresholds. At the same time, the processor identifies the captured images to determine if the seat belt is incorrectly worn, such as the latch 1101 not being inserted into the buckle 1102 or the webbing 1103 slipping below the shoulder. If an incorrect wearing condition is determined, the processor immediately sends a command to the alarm system 120, triggering the system to generate the first correct wearing reminder message, urging the occupant to adjust the wearing method to ensure that the seat belt is in the correct protective state.

[0041] The following examples illustrate the seatbelt system proposed in this application: 1. When occupants are wearing seat belts correctly and no accident has occurred, the seat belts will not be pre-tensioned; 2. In the event of an accident, the speed sensor transmits a deceleration signal to the seatbelt controller; 3. The recognition component transmits the occupant's body shape signal to the seatbelt controller; 4. The force sensors on the webbing transmit the shoulder strap force and waist belt force signals to the seat belt controller; 5. The seatbelt controller determines the collision intensity based on the deceleration signal and, in conjunction with the occupant's body shape, determines the moment the seatbelt deploys. Figure 4 Flowchart for seatbelt detonation; 6. After determining the detonation time, pre-tighten the seat belt. The seat belt controller sends a signal to the retractor, the hydraulic system starts working, and the seat belt begins to tighten. When the shoulder belt force and waist belt force reach the preset pre-tightening threshold, the seat belt controller sends a signal and the hydraulic system stops working. 7. As the collision progresses, the shoulder belt force and lap belt force continuously increase. When the preset force limit threshold is reached, the seat belt controller sends a signal, the hydraulic system works, and the seat belt begins to loosen to prevent excessive tension from causing injury to the ribs.

[0042] The seatbelt system proposed in this application includes a seatbelt assembly, an alarm system, a deceleration sensor, an identification component, and a seatbelt controller. The deceleration sensor accurately collects vehicle deceleration data; the identification component fuses occupant images and weight data to identify occupant body shape and determine seatbelt wearing status; and it can trigger the alarm system to generate a first correct wearing reminder when incorrect wearing is detected. The seatbelt controller, based on vehicle deceleration and occupant body shape data, accurately determines the activation moment and action threshold of the seatbelt assembly and implements corresponding control. Through multi-component collaboration, this system determines the seatbelt force limit based on occupant body shapes, providing protection for occupants of all body types. The seatbelt activation moment is determined based on a combination of occupant body shape and collision intensity, also providing protection for occupants of all body types. It can remind occupants of different body types to wear the seatbelt correctly, preventing secondary injuries from the seatbelt. Therefore, it solves the problem in related control technologies where uniform seatbelt control parameters lead to poor protective effects and a high risk of secondary injuries.

[0043] A second aspect of this application provides a vehicle that includes the aforementioned seatbelt system.

[0044] Figure 5 This is a flowchart illustrating a seatbelt system reminder method provided in an embodiment of this application.

[0045] like Figure 5 As shown, the reminder method of this seat belt system includes the following steps: In step S501, images of the occupants inside the vehicle are acquired. Understandably, the seatbelt system's reminder method, based on visual image recognition, can directly observe the details of seatbelt wearing. Compared to traditional buckle switches, which can only detect "whether the latch is inserted," it can identify more incorrect wearing scenarios, such as the webbing slipping off the shoulder and wearing it backwards, thus eliminating the potential for safety failure at the source.

[0046] In step S502, based on the occupant image recognition of the occupant's seatbelt wearing result, if the seatbelt wearing result is a preset error result, the alarm system is controlled to generate a first correct wearing reminder message.

[0047] Understandably, incorrect seatbelt use can cause seatbelts to become completely ineffective in a collision. This method proactively identifies and reminds passengers to correct their seatbelts during normal driving, avoiding the passive situation of discovering ineffective protection only after an accident occurs, and significantly improving the actual protective effect of seatbelts. The reminder information directly points to the clear goal of "correct wearing," and combined with the accuracy of image recognition, it allows occupants to quickly understand the problem without having to repeatedly try to adjust it, reducing driving and riding interference caused by ineffective operations.

[0048] The seatbelt reminder method proposed in this application first acquires images of the occupants inside the vehicle. Using image recognition as the core, compared to traditional methods that only monitor the buckle switch, it can identify more diverse incorrect wearing scenarios such as webbing slippage and backwards wearing, eliminating potential safety failures at the source. When the seatbelt wearing result is a preset incorrect result, the alarm system generates a first correct wearing reminder message, proactively reminding occupants to correct their wearing method during normal driving, avoiding seatbelt failure due to improper wearing during a collision, and significantly improving protective effectiveness. This solves the problems in related technologies where it is impossible to effectively identify and intervene in incorrect or false wearing behaviors of occupants, and where such behaviors can easily cause secondary injuries to occupants.

[0049] Figure 6 This is a flowchart of a control method for a seat belt system provided in an embodiment of this application.

[0050] like Figure 6 As shown, the control method of this seat belt system includes the following steps: In step S601, the vehicle's deceleration and the occupant body size data identified by the recognition component are obtained. Understandably, deceleration is a key quantitative indicator for determining whether a collision has occurred and the severity of the collision, accurately reflecting the real-time state of the collision. Occupant body shape data is the core basis for achieving personalized protection, avoiding the uniform fixed protection mode of traditional seat belts. The simultaneous acquisition of these two types of data ensures that subsequent control decisions not only conform to the actual collision conditions but also adapt to the different body characteristics of occupants, improving the accuracy and targeting of control logic from the source.

[0051] In step S602, when a vehicle collision occurs, the deceleration is determined, the detonation time of the seat belt assembly is determined based on the deceleration and occupant body size data, and the action threshold of the seat belt assembly is determined based on the occupant body size data.

[0052] Understandably, determining the detonation time by combining deceleration and occupant body size data avoids unnecessary pre-tightening pressure caused by premature detonation, and also prevents the problem of ineffective occupant restraint caused by delayed detonation. Setting action thresholds separately based on occupant body size data can define exclusive safety protection boundaries for occupants of different body sizes, completely solving the drawback of traditional fixed thresholds that cannot take into account the protection needs of different groups, and improving the safety and comfort of protection.

[0053] In step S603, the seat belt assembly is controlled according to the detonation time and the action threshold.

[0054] Understandably, on the one hand, actions are triggered according to the moment of detonation to ensure seamless coordination between protective actions and the collision process; on the other hand, the pretensioning stop and force-limiting release points are controlled according to action thresholds to avoid over-protection or under-protection. This closed-loop control logic can respond to parameter changes during the collision process in real time, ensuring that the seat belt is always in the optimal protective state, minimizing the risk of injury to occupants in a collision.

[0055] The following examples illustrate the control method of the seat belt system proposed in this application.

[0056] like Figure 7 The diagram shows a flowchart of an embodiment of the control method for a seatbelt system.

[0057] In step S701, the occupant first sits in the vehicle seat.

[0058] In step S702, shoulder belt force and waist belt force are measured in parallel, while the camera recognition component captures and processes the images.

[0059] In step S703, when the occupant is wearing the seat belt, step S604 is executed; when the occupant is not wearing the seat belt correctly, the alarm system will sound a buzzer to remind the occupant to wear the seat belt properly.

[0060] In step S704, if the occupant is wearing a seatbelt, the camera recognition component determines whether the occupant is wearing the seatbelt correctly. The shoulder strap should cross the shoulder and chest, and the lap belt should fit snugly against the hip. If the occupant is not wearing the seatbelt correctly, the camera recognition component transmits a signal to the alarm system, which will then emit a buzzer to remind the occupant to adjust the height adjustment device according to their body shape until the occupant is wearing the seatbelt correctly.

[0061] In step S705, if the occupant is wearing a seat belt, the alarm system determines whether the shoulder strap force and lap belt force on the seat belt have reached the preset comfort threshold. If they have reached or exceeded the threshold, the alarm system will activate and remind the occupant to adjust the height adjustment device until the shoulder strap force and lap belt force are within the comfortable wearing range.

[0062] The control method for the seat belt system proposed in this application involves first acquiring vehicle deceleration and occupant body shape data identified by a recognition component. Then, when a vehicle collision is determined based on deceleration, the seat belt assembly's detonation moment is determined by combining the deceleration and occupant body shape data. An action threshold is also determined based on the occupant body shape data. Finally, the seat belt assembly is controlled according to the detonation moment and action threshold. This achieves precise and personalized control of the seat belt assembly's collision protection actions, avoiding the problems of insufficient or excessive protection caused by traditional fixed protection parameters. It improves the accuracy and effectiveness of the seat belt system's protection in collision scenarios. Therefore, it solves the problem in related control technologies where uniform seat belt control parameters lead to poor protective effects and are prone to causing secondary injuries.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0065] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0066] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (FPGAs), field-programmable gate arrays (FPGAs), etc.

[0067] Those skilled in the art will understand that all or part of the steps of the methods implementing the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0068] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A seatbelt system, characterized in that, include: Seat belt assembly and alarm system; A deceleration sensor is used to collect the deceleration of a vehicle. The recognition component is used to acquire occupant images and occupant weight data inside the vehicle, recognize occupant body shape data based on the occupant images and occupant weight data, recognize the occupant's seat belt wearing result based on the occupant images, and control the alarm system to generate a first correct wearing reminder message when the seat belt wearing result is a preset error result; A seatbelt controller is configured to determine the moment when a collision occurs in the vehicle based on the deceleration, determine the moment of ignition of the seatbelt assembly based on the deceleration and the occupant body size data, determine the action threshold of the seatbelt assembly based on the occupant body size data, and control the seatbelt assembly based on the moment of ignition and the action threshold.

2. The seatbelt system according to claim 1, characterized in that, The seat belt assembly includes a latch, buckle, webbing, height adjuster, force sensor, and retractor. The buckle is fixed to the seat, and the latch inserts into the buckle when the occupant is wearing the seat belt correctly. The webbing is used to restrain the occupant to the seat. The height adjuster controls the position of the seat belt. The force sensor is located on the webbing and is used to obtain the occupant's shoulder strap force and lap belt force. The retractor is used to tighten and loosen the seat belt.

3. The seatbelt system according to claim 2, characterized in that, The retractor includes a retracting device and a hydraulic device. The retracting device is used to tighten and loosen the seat belt, and the hydraulic device provides power to the retracting device in response to control commands from the seat belt controller.

4. The seatbelt system according to claim 3, characterized in that, The hydraulic device includes a first chamber, a second chamber, a third chamber, a fourth chamber, a fifth chamber, a first valve, a second valve, a third valve, a piston, and a crank-connecting rod mechanism. When the occupant correctly wears the seatbelt, hydraulic oil in the first chamber is injected into the third chamber through the second valve, and the piston compresses the nitrogen gas in the second chamber. When the seatbelt is pre-tensioned, hydraulic oil is injected into the fourth chamber through the third valve in the third chamber. The hydraulic oil in the fourth chamber pushes the crank-connecting rod mechanism and compresses the nitrogen gas in the fifth chamber. The crank-connecting rod mechanism is connected to the retraction device to pre-tension the seatbelt. The pre-tension force of the seatbelt is controlled by controlling the amount of hydraulic oil injected into the fourth chamber. When the seatbelt is loosened, hydraulic oil is injected into the first chamber through the first valve in the fourth chamber. The nitrogen gas in the fifth chamber compresses the crank-connecting rod mechanism. The pre-tension force and limiting force of the seatbelt are controlled by controlling the amount of hydraulic oil injected into the first chamber.

5. The seatbelt system according to claim 2 or 4, characterized in that, The action thresholds include a pretensioning threshold and a force limiting threshold. When the seat belt controller detects that the shoulder strap force and lap belt force reach the pretensioning threshold, it controls the retractor to stop the seat belt pretensioning. When the seat belt controller detects that the shoulder strap force and lap belt force reach the force limiting threshold, it controls the retractor to loosen the seat belt.

6. The seatbelt system according to claim 2, characterized in that, The alarm system is connected to the force sensor on the seat belt. When the vehicle is not in a collision, if the shoulder strap force and the lap belt force exceed a preset comfort threshold, a second correct wearing reminder message is generated to remind the occupant to wear the seat belt correctly by adjusting the height adjustment device.

7. The seatbelt system according to claim 1, characterized in that, The recognition component includes an image sensor, a weight sensor, and a processor. The image sensor acquires images of occupants inside the vehicle, the weight sensor acquires the weight data of the occupants, the processor identifies the occupant's body shape data based on the occupant images and the occupant's weight data, and identifies the occupant's seatbelt wearing result based on the occupant images. When the seatbelt wearing result is a preset error result, the processor controls the alarm system to generate a first correct wearing reminder message.

8. A vehicle, characterized in that, Includes the seat belt system as described in any one of claims 1-7.

9. A method for reminding passengers using a seatbelt system, characterized in that, The method is applied to the identification component of the seatbelt system according to any one of claims 1-7, wherein the method comprises: Acquire images of the occupants inside the vehicle; Based on the occupant image recognition result of the occupant's seat belt wearing, when the seat belt wearing result is a preset error result, the alarm system is controlled to generate a first correct wearing reminder message.

10. A control method for a seatbelt system, characterized in that, The method is applied to the seat belt controller of the seat belt system according to any one of claims 1-7, wherein the method includes: Acquire vehicle deceleration and occupant body shape data identified by the recognition component; The timing of a vehicle collision is determined based on the deceleration, the timing of seatbelt deployment is determined based on the deceleration and the occupant body size data, and the activation threshold of the seatbelt assembly is determined based on the occupant body size data. The seat belt assembly is controlled based on the detonation time and the action threshold.

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