Quick reset control method for vehicle-mounted zero-gravity seat backrest

Abstract

The invention discloses a quick reset control method for a vehicle-mounted zero-gravity seat backrest, which has the main design conception that collision signals of a vehicle are continuously monitored, and the current posture of a zero-gravity seat is detected in real time; when the vehicle collides or is about to collide, current seat fault information is read, and whether a preset firework type unlocking device is triggered to ignite or not is decided by combining the collision signal and the current posture, so that a limiting structure of a zero-gravity seat backrest is physically cut off, and the posture of the seat is reset. According to the method, whether the ignition condition of the unlocking device is met or not is accurately judged according to multiple factors, and the backrest of the zero-gravity seat can be quickly returned to a relatively safe posture after the ignition condition is met, so that personal injury of passengers is reduced or avoided as much as possible when the vehicle collision occurs.

Description

Technical Field

[0001] The present invention relates to the field of automobile safety technology, and in particular to a method for quickly resetting a vehicle-mounted zero-gravity seat backrest. Background Art

[0002] To ensure passenger comfort, some high-end models are equipped with zero-gravity seats. Generally speaking, zero-gravity seats offer three seating positions: normal sitting, reclining, and zero-gravity reclining. In the event of a collision, the normal sitting position is considered safe, the reclining position is relatively safe (but carries certain risks), and the zero-gravity reclining position is considered more dangerous (with a greater risk).

[0003] The above-mentioned risks mainly refer to the safety hazard that when a vehicle collides, the occupants may slide out of the seat and be free from the seat belt due to the impact force. Summary of the Invention

[0004] In view of the above, the present invention aims to provide a method for quickly resetting a vehicle-mounted zero-gravity seat backrest to solve the aforementioned technical problems.

[0005] The technical solution adopted in the present invention is as follows:

[0006] The present invention provides a method for quickly resetting a vehicle-mounted zero-gravity seat backrest, comprising:

[0007] Continuously monitor the vehicle for collision signals;

[0008] Real-time detection of the current posture of the zero-gravity chair;

[0009] When the vehicle collides or is about to collide, the current seat fault information is read, and combined with the collision signal and the current posture, a decision is made whether to trigger the ignition of the pre-set pyrotechnic unlocker to physically cut off the limit structure of the zero-gravity seat back and reset the seat posture.

[0010] In at least one possible implementation manner, the collision signal includes: a preset CAN message indicating whether there is a collision, and a PWM waveform indicating whether there is a collision through hard-wired high and low levels.

[0011] In at least one possible implementation, the decision of whether to trigger the ignition of a preset pyrotechnic unlocker specifically includes:

[0012] Only when the fault information, the collision signal and the current posture simultaneously meet predetermined conditions, the pyrotechnic unlocker is triggered to ignite to explode the limiting structure.

[0013] In at least one possible implementation, the predetermined condition comprises: the fault information represents no fault or a low-level fault, the collision signal represents that a collision is determined to occur, and the current posture represents that a working angle of the zero-gravity seat at present is greater than or equal to a preset backrest unlocking threshold.

[0014] In at least one possible implementation, the backrest unlocking threshold = a maximum angle of a seat backrest + 90° - a maximum angle of a seat cushion.

[0015] In at least one possible implementation, the collision signal represents that a collision is determined to occur, specifically: a CAN message represents that a collision occurs and / or at least two continuous and complete PWM waveforms are received.

[0016] Compared with the prior art, the main design concept of the present application is that the collision signal of the vehicle is continuously monitored, and the current posture of the zero-gravity seat is detected in real time; when the vehicle collides or is about to collide, the current seat fault information is read, and at the same time, the collision signal and the current posture are combined to determine whether to trigger the preset pyrotechnic unlocker to work to physically cut off the limiting structure of the backrest of the zero-gravity seat and reset the seat posture. The present application accurately judges whether the unlocking condition is met according to multiple factors, and can quickly reset the backrest of the zero-gravity seat to a relatively safe posture after the ignition condition is met, so as to minimize or avoid personal injury when the vehicle collides. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described below with reference to the drawings, in which:

[0018] Figure 1 A schematic diagram of the vehicle-mounted zero-gravity seat backrest rapid reset control method provided by the embodiment of the present application is shown. DETAILED DESCRIPTION

[0019] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, in which the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be interpreted as a limitation on the present application.

[0020] The present application proposes an embodiment of a vehicle-mounted zero-gravity seat backrest rapid reset control method, specifically as shown in Figure 1 , which includes:

[0021] Step S1, continuously monitoring a collision signal of a vehicle;

[0022] In actual operation, the airbag controller can provide the sensed collision signal to the seat safety control system through hard wires and CAN lines.

[0023] The specific output collision signal can be in two forms:

[0024] (1) CAN signal: 0x0 represents no collision, 0x1 represents collision, and 0x2 represents invalid signal;

[0025] (2) PWM signal: The collision state can be transmitted in the form of a pulse wave by changing the frequency of the hard line high and low levels.

[0026] Step S2: detecting the current posture of the zero-gravity chair in real time;

[0027] Specifically, the current posture can be determined by the angle between the seat back and the seat cushion, or directly based on the current setting gear of the seat.

[0028] Step S3: When the vehicle collides or is about to collide, the current seat fault information is read, and combined with the collision signal and the current posture, a decision is made whether to trigger the ignition of a preset pyrotechnic unlocker to physically cut off the limit structure of the zero-gravity seat back and reset the seat posture.

[0029] Specifically, the aforementioned pyrotechnic unlocking device (pyrotechnic generator), such as, but not limited to, an exhaust-type generator, is often used in vehicle safety systems. Upon triggering ignition, the high-temperature, high-pressure gas generated by the explosion of the pyrotechnic composition drives its associated components (actuators), thereby releasing the restraints on the locking mechanism. For example, the pyrotechnic unlocking device described herein, upon triggering ignition, can ignite the unlocking mechanism of the seat backrest, thereby returning the seat to its initial position (e.g., a normal, safe seating position) in a very short time.

[0030] Regarding an impending collision, in some vehicle control systems, an actual collision can be predicted in advance before the collision occurs. In such systems, the aforementioned collision signals can be preset so that once an unavoidable collision is predicted to occur, the corresponding CAN message and PWM waveform are set in advance to the signal state representing the occurrence of a collision, so as to trigger the seat reset as early as possible and provide safety protection in advance.

[0031] Regarding reading fault information, in actual operation, it may mean that the seat safety control system at least monitors the fault level (reflected by fault code) of the controllers related to the zero-gravity seat (such as the seat controller, airbag controller, etc.) and the circuit fault status.

[0032] The decision of whether to trigger the ignition of the preset pyrotechnic unlocker may specifically include:

[0033] Only when the fault information, the collision signal and the current posture simultaneously meet predetermined conditions, the pyrotechnic unlocker is triggered to ignite to explode the limiting structure.

[0034] In other words, if any of the three conditions are not met, the unlocking device cannot be triggered. These conditions include: the fault information indicating no fault or a low-level fault, the collision signal indicating a confirmed collision, and the current posture indicating that the zero-gravity seat's current operating angle is greater than or equal to a preset backrest unlocking threshold.

[0035] The backrest unlocking threshold (angle threshold of the trigger generator) described here can be specifically calibrated based on a sliding table test. In some preferred embodiments, the backrest unlocking threshold = the maximum angle of the seat back + 90° - the maximum angle of the seat cushion.

[0036] Finally, it should be noted that, in conjunction with the aforementioned embodiments, the collision signal indicating a collision can be specifically indicated by a CAN message indicating a collision and / or by receiving at least two consecutive and complete PWM waveforms. This approach demonstrates the redundant design of the PWM waveforms and CAN signals, ensuring timely, accurate, and effective unlocking, allowing the seat back to quickly return to a safe position. In actual applications, the seat safety control system can only determine that a collision has occurred (including the aforementioned imminent and unavoidable collision) upon detecting a CAN message indicating a collision returned by the airbag controller and / or receiving at least two consecutive complete PWM waveform changes.

[0037] In summary, the main design concept of the present invention is to continuously monitor the vehicle's collision signals and detect the current posture of the zero-gravity seat in real time. When the vehicle collides or is about to collide, it reads the current seat fault information and, based on the collision signal and the current posture, determines whether to trigger the ignition of a pre-set pyrotechnic unlocker, thereby physically disconnecting the zero-gravity seat backrest's limit structure and resetting the seat's posture. The present invention accurately determines whether the unlocker's ignition conditions are met based on multiple factors. Once the ignition conditions are met, the zero-gravity seat backrest can be quickly returned to a relatively safe position, ensuring that personal injury to the occupants is minimized or avoided in the event of a vehicle collision.

[0038] If the expressions expressing directions are mentioned in the embodiments of the present invention, they are relative concepts based on the embodiments. In addition, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can represent: a, b, c, a and b, a and c, b and c or a, b and c, where a, b, c can be single or multiple.

[0039] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings, but the above is only a preferred embodiment of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred modes can be reasonably combined and matched into a variety of equivalent schemes by those skilled in the art without departing from or changing the design ideas and technical effects of the present invention; therefore, the scope of implementation of the present invention is not limited to what is shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the scope of protection of the present invention.

Claims

1. A method for quickly resetting a vehicle-mounted zero-gravity seat backrest, characterized in that: include: Continuously monitor the vehicle for collision signals; Real-time detection of the current posture of the zero-gravity chair; When the vehicle collides or is about to collide, the current seat fault information is read, and combined with the collision signal and the current posture, a decision is made whether to trigger the ignition of the pre-set pyrotechnic unlocker to physically cut off the limit structure of the zero-gravity seat back and reset the seat posture.

2. The vehicle-mounted zero-gravity seat backrest rapid reset control method according to claim 1, characterized in that: The collision signal includes: a preset CAN message indicating whether there is a collision, and a PWM waveform indicating whether there is a collision through hard-wired high and low levels.

3. The vehicle-mounted zero-gravity seat backrest rapid reset control method according to claim 2, characterized in that: The decision of whether to trigger the ignition of the preset pyrotechnic unlocker specifically includes: Only when the fault information, the collision signal and the current posture simultaneously meet predetermined conditions, the pyrotechnic unlocker is triggered to ignite to explode the limiting structure.

4. The vehicle-mounted zero-gravity seat backrest rapid reset control method according to claim 3, characterized in that: The predetermined conditions include: the fault information indicates no fault or a low-level fault, the collision signal indicates a confirmed collision, and the current posture indicates that the current working angle of the zero-gravity seat is greater than or equal to a preset backrest unlocking threshold.

5. The vehicle-mounted zero-gravity seat backrest rapid reset control method according to claim 4, characterized in that: The backrest unlocking threshold=the maximum angle of the seat back+90°-the maximum angle of the seat cushion.

6. The vehicle-mounted zero-gravity seat backrest rapid reset control method according to claim 4, characterized in that: The collision signal indicates that a collision has occurred, which specifically means that a CAN message indicates that a collision has occurred and / or at least two continuous and complete PWM waveforms are received.

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