CN107284404B - Seat belt device, seat belt prompting method, and vehicle - Google Patents
Seat belt device, seat belt prompting method, and vehicle Download PDFInfo
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- CN107284404B CN107284404B CN201610200721.6A CN201610200721A CN107284404B CN 107284404 B CN107284404 B CN 107284404B CN 201610200721 A CN201610200721 A CN 201610200721A CN 107284404 B CN107284404 B CN 107284404B
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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
- B60R2022/4816—Sensing means arrangements therefor for sensing locking of buckle
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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
- B60R2022/4825—Sensing means arrangements therefor for sensing amount of belt winded on retractor
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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
- B60R2022/4858—Sensing means arrangements therefor for sensing pressure on seat
-
- 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
- B60R2022/4866—Displaying or indicating arrangements thereof
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
The invention discloses a safety belt device, a safety belt prompting method and a vehicle, wherein the safety belt device is arranged on a seat of the vehicle, and the safety belt device comprises: a seat belt; the winding module is used for winding the safety belt; the signal output module is used for reflecting the winding amount of the safety belt in the winding process of the safety belt through output pulse signals; and a processing module for: when the acceleration of the vehicle is greater than a preset acceleration threshold, controlling a winding module to wind the safety belt, acquiring the number of first pulse signals output by a signal output module within a preset time period, and judging whether the number of the first pulse signals is less than a preset first pulse number threshold; and when the number of the first pulse signals is smaller than the first pulse number threshold value, sending a safety belt unfastening prompt. Whether a vehicle passenger fastens the safety belt or not can be detected, and the false fastening safety belt can be identified so as to give a prompt when the safety belt is not fastened, and the safety of the vehicle is improved.
Description
Technical Field
The invention relates to the field of vehicle safety, in particular to a safety belt device, a safety belt prompting method and a vehicle.
background
safety belts are a very critical component of vehicle safety systems. During normal high-speed running of the vehicle, the sitting posture of the passenger can shake due to the change of traffic and road conditions, such as braking and turning, or acceleration generated by the change of the road surface. Without the seatbelt restraint, the occupant may collide with the vehicle interior components when the acceleration is large. In extreme cases, such as a vehicle crash, the occupant may be thrown out of the vehicle due to extreme acceleration if there is no seatbelt restraint. When the air bag is ejected and unfolded, the passengers are contacted with the air bag which is not completely unfolded due to the forward movement of the sitting posture under the acceleration, and are subjected to superposition impact, so that the passengers are more seriously injured. Therefore, when riding a high-speed vehicle, it is necessary to fasten a seat belt.
Currently, most of the vehicle occupants, such as the driver and the passenger seat, are provided with a seatbelt apparatus, which includes: the safety belt, the safety belt lock catch, the reminding module and the like. When the passenger thinks that the restraint of the safety belt is uncomfortable due to insufficient safety consciousness, the passenger may choose not to fasten the safety belt, and the reminding module can send out the reminding that the safety belt is not fastened when the passenger is detected to be seated on the seat but the safety belt is not fastened.
However, some occupants may use a dummy belt tongue to insert into the belt buckle or to pass the belt around the back of the body and directly into the belt buckle to fool the reminder module. In contrast, the conventional seat belt apparatus may not be able to detect such a fraudulent conduct, and a seat belt unfastening prompt may not be generated, resulting in low safety of the vehicle.
disclosure of Invention
The invention provides a safety belt device, a safety belt prompting method and a vehicle, which are used for detecting whether a vehicle passenger fastens a safety belt or not so as to send out a safety belt unfastening prompt when the safety belt is unfastened, and improve the safety of the vehicle.
In order to achieve the above object, as one aspect of the present invention, there is provided a seat belt device provided on a seat of a vehicle, the seat belt device including: a seat belt; the winding module is used for winding the safety belt; the signal output module is used for reflecting the winding amount of the safety belt in the winding process of the safety belt through output pulse signals; and a processing module for:
when the acceleration of the vehicle is greater than a preset acceleration threshold value, controlling the winding module to wind the safety belt, and acquiring the number of first pulse signals output by the signal output module within a preset time period, wherein the number of the first pulse signals is positively correlated with the winding amount of the safety belt;
Judging whether the number of the first pulse signals is smaller than a preset first pulse number threshold value or not;
And when the number of the first pulse signals is smaller than the first pulse number threshold value, sending out a safety belt unfastening prompt.
Optionally, the processing module is further configured to:
When a passenger is in the seat and the safety belt buckle is connected with the safety belt lock tongue, controlling the winding module to wind the safety belt to a preset limited winding amount according to a preset speed;
Acquiring the number of second pulse signals output by the signal output module in the process of rolling up the safety belt at a preset speed;
judging whether the number of the second pulse signals is smaller than a preset second pulse number threshold value or not;
and when the number of the second pulse signals is smaller than the second pulse number threshold value, sending out a safety belt unfastening prompt.
Optionally, the furling module includes: a motor, a transmission component, a clutch component and a tape winding drum,
The transmission assembly is respectively connected with the motor and the clutch assembly, the clutch assembly is connected with the belt winding drum, and the motor drives the transmission assembly to drive the clutch assembly to rotate so as to drive the belt winding drum to rotate, so that the belt winding drum winds the safety belt.
Optionally, the signal output module includes: a multi-pole magnetic ring and a magnetic field sensor,
the multi-pole magnetic ring is arranged on the outer side of the clutch assembly and can rotate coaxially with the clutch assembly;
The magnetic field sensor is arranged on the surface of the multistage magnetic ring, and when the clutch assembly rotates, the magnetic field sensor can collect magnetic signals generated by magnetic pole changes when the multistage magnetic ring rotates and convert the magnetic signals into pulse signals to be output.
optionally, the magnetic field sensor is a hall sensor.
Optionally, the transmission assembly includes: the driving gear is connected with the motor, and the transmission gear is meshed with the driving gear.
Optionally, the clutch assembly is connected with the transmission gear through a gear;
An inclined sliding block is arranged between the clutch assembly and the belt winding drum, and when the motor drives the transmission assembly to drive the clutch assembly to rotate along a first preset direction, the clutch assembly is connected with the belt winding drum through the inclined sliding block and drives the belt winding drum to rotate along the first preset direction so as to wind the safety belt; when the motor drives the transmission assembly to drive the clutch assembly to rotate along a second preset direction, the clutch assembly is separated from the tape winding drum.
as another aspect of the present invention, there is provided a seat belt reminder method including:
When the acceleration of the vehicle is larger than a preset acceleration threshold value, controlling a winding module to wind the safety belt, and acquiring the number of first pulse signals output by a signal output module within a preset time period, wherein the number of the first pulse signals is positively correlated with the winding amount of the safety belt;
judging whether the number of the first pulse signals is smaller than a preset first pulse number threshold value or not;
and when the number of the first pulse signals is smaller than the first pulse number threshold value, sending out a safety belt unfastening prompt.
Optionally, the method further includes:
When a passenger is in the seat and the safety belt buckle is connected with the safety belt lock tongue, controlling the winding module to wind the safety belt to a preset limited winding amount according to a preset speed;
acquiring the number of second pulse signals output by the signal output module in the process of rolling up the safety belt at a preset speed;
judging whether the number of the second pulse signals is smaller than a preset second pulse number threshold value or not;
And when the number of the second pulse signals is smaller than the second pulse number threshold value, sending out a safety belt unfastening prompt.
As still another aspect of the present invention, there is provided a vehicle including: according to the invention, the safety belt device is provided.
The safety belt device comprises a safety belt, a winding module, a signal output module and a processing module, wherein the processing module controls the winding module to wind the safety belt when the acceleration of a vehicle is greater than a preset acceleration threshold value, and acquiring the number of first pulse signals output by the signal output module within a preset time period, wherein the number of the first pulse signals is positively correlated with the furling amount of the safety belt, that is, the larger the number of the first pulse signals, the higher the retraction amount of the seat belt, the tighter the seat belt is, because the winding amount of the safety belt worn by the passenger is greatly different from the winding amount of the safety belt not worn by the passenger during the running process of the vehicle, correspondingly, whether the passenger fastens the safety belt or not can be effectively discriminated by comparing the number of the first pulse signals with a preset first pulse number threshold value, so that whether the number of the first pulse signals is smaller than the preset first pulse number threshold value or not is judged; and when the number of the first pulse signals is smaller than the first pulse number threshold value, sending out a safety belt unfastening prompt. Therefore, whether the vehicle passenger fastens the safety belt or not can be detected, the false fastening of the safety belt can be identified, and the safety belt unfastening prompt is sent when the safety belt is not fastened, so that the safety of the vehicle is improved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a block diagram of a seatbelt apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a seatbelt apparatus according to an embodiment of the present invention;
fig. 3 is a schematic circuit control diagram of a seatbelt apparatus according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a seat belt prompting method according to an embodiment of the present invention;
Fig. 5 is a schematic flow chart of another seatbelt prompting method according to an embodiment of the present invention.
Detailed Description
the following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
An embodiment of the present invention provides a seatbelt apparatus 10, as shown in fig. 1, in which the seatbelt apparatus 10 is provided on a seat of a vehicle, and the seatbelt apparatus 10 includes: a seat belt 101, said device 10 further comprising: a retraction module 102 for retracting the seat belt; the signal output module 103 is used for reflecting the retraction amount of the safety belt in the retraction process of the safety belt by outputting a pulse signal;
A processing module 104 configured to:
When the acceleration of the vehicle is greater than a preset acceleration threshold (for example, during emergency braking), controlling the retraction module 102 to retract the safety belt, and acquiring the number of first pulse signals output by the signal output module 103 within a preset time period, where the number of the first pulse signals is positively correlated to the retraction amount of the safety belt; the preset time period may be a time period from when the acceleration of the vehicle is detected to be greater than a preset acceleration threshold value to when the seat belt is locked (which may be understood as the seat belt is not retracted or the seat belt is retracted by a certain retraction amount).
Judging whether the number of the first pulse signals is smaller than a preset first pulse number threshold value or not;
And when the number of the first pulse signals is smaller than the first pulse number threshold value, sending out a safety belt unfastening prompt.
in the embodiment of the invention, the acceleration state of the vehicle can be acquired by querying an Electronic Stability Program (ESP) of the vehicle body, so as to detect whether the acceleration state of the vehicle is greater than a preset acceleration threshold.
Further, it may also be detected whether to fasten the seat belt when acceleration is not detected, for example, whether to actually fasten the seat belt may be detected by pre-tightening the seat belt when a passenger is detected on the seat and the seat belt buckle is connected to the seat belt tongue, and in particular, the processing module 104 may be configured to:
When a passenger is in the seat and the safety belt buckle is connected with the safety belt bolt, controlling the rolling module 102 to roll the safety belt to a preset limited rolling amount according to a preset speed;
Acquiring the number of second pulse signals output by the signal output module 103 in the process of rolling up the safety belt at a preset speed;
Judging whether the number of the second pulse signals is smaller than a preset second pulse number threshold value or not;
And when the number of the second pulse signals is smaller than the second pulse number threshold value, sending out a safety belt unfastening prompt.
Optionally, as shown in fig. 2, the furling module 102 includes: a motor 1021, a drive assembly 1022, a clutch assembly 1023, and a take-up spool 1024.
the transmission component 1022 is respectively connected with the motor 1021 and the clutch component 1023, the clutch component 1023 is connected with the belt winding drum 1024, and the motor 1021 drives the transmission component 1022 to drive the clutch component 1023 to rotate so as to drive the belt winding drum 1024 to rotate, so that the belt winding drum 1024 winds the safety belt 101. By way of example, the transmission assembly 1022 may include: a driving gear 1022a connected to the motor 1021, and a transmission gear 1022b engaged with the driving gear 1022 a. The clutch assembly 1023 and the transmission gear 1022b can be connected through a gear. An inclined sliding block is arranged between the clutch component 1023 and the belt winding drum 1024, when the motor 1021 drives the clutch component 1023 to rotate (rotate forward) along a first preset direction by driving the transmission component 1022, the clutch component 1023 is connected with the belt winding drum 1024 by the inclined sliding block and drives the belt winding drum 1024 to rotate along the first preset direction to wind up the safety belt 101; when the motor 1021 drives the clutch assembly 1023 to rotate (rotate reversely) in a second preset direction by driving the transmission assembly 1022, the clutch assembly 1023 is separated from the tape winding drum 1024.
It should be noted that, after the seatbelt non-fastening prompt is issued, if the detected acceleration of the vehicle is smaller than the preset acceleration threshold, the motor 1021 drives the transmission assembly 1022 to drive the clutch assembly 1023 to rotate in a second preset direction, so that the clutch assembly 1023 is separated from the take-up drum 1024. And when the seat belt 101 is wound to a locked state (which may be a predetermined limited winding amount or the winding is not moved) after the passenger is seated on the seat and the connection between the seat belt buckle and the seat belt tongue is detected, the motor 1021 drives the transmission assembly 1022 to drive the clutch assembly 1023 to rotate in a second predetermined direction, so that the clutch assembly 1023 is separated from the belt winding drum 1024.
optionally, as shown in fig. 2, the signal output module 103 includes:
The multi-pole magnetic ring 1031 can be embedded in the annular groove, so that effective fixation of the multi-pole magnetic ring 1031 is ensured on one hand, and the multi-pole magnetic ring 1031 can rotate coaxially with the clutch component 1023 on the other hand.
The magnetic field sensor 1032 is disposed on the surface of the multi-stage magnetic ring 1031, and has a small distance, for example, a distance within 2 mm, with the multi-stage magnetic ring 1031, and when the clutch assembly rotates, the magnetic field sensor 1032 can collect a magnetic signal generated by a magnetic pole change when the multi-stage magnetic ring 1031 rotates, and convert the magnetic signal into a pulse signal to be output. The magnetic field sensors 1032 are at least one, and the magnetic field sensors 1032 may be hall sensors. In practice, there may be two magnetic field sensors 1032, as shown in fig. 2, which are hall sensor 1032a and hall sensor 1032b, respectively. The hall sensor is a sensor that converts magnetic field intensity into an electric signal using the hall effect.
in the embodiment of the present invention, it is assumed that the processing module 104 is a Microprocessor (MCU)1041, fig. 3 is a circuit control schematic diagram of the seat belt apparatus 10 according to the embodiment of the present invention, and as shown in fig. 3, the hall sensors 1032a and 1032b are used to collect magnetic signals (also called rotating magnetic ring signals) generated by magnetic pole changes when the multi-pole magnetic ring rotates, and convert the magnetic signals into pulse signals for output. The power and communication module 301 includes: the voltage conversion module 3011, the communication module 3012, and the voltage conversion module 3011, configured to convert a voltage input by the vehicle power supply 302 into a voltage required by the microprocessor 1041; the communication module 3012 is configured to connect to a Controller Area Network (CAN) bus 303, modulate a differential signal transmitted by the CAN bus into a communication level signal supported by the microprocessor 1041, and the power supply and communication module 301 is connected to the microprocessor 1041 through the power supply and communication transmission line 304. The reverse polarity protection circuit 305 supplies power to the motor driving module 306, and is provided with a large capacitor to suppress electromagnetic Compatibility (EMC) disturbance. The motor driving module 306 is further designed with an overcurrent and overvoltage detection and protection function to prevent the system from being damaged due to an abnormal condition such as motor stalling, and the motor driving module 306 is used for driving the motor 307 (i.e. the motor 1021 in fig. 2).
In summary, in the seat belt device provided in the embodiment of the present invention, when the acceleration of the vehicle is greater than the preset acceleration threshold, the retraction module is controlled to retract the seat belt, and the number of the first pulse signals output by the signal output module in the preset time period is obtained, because the greater the number of the first pulse signals is, the higher the retraction amount of the seat belt is, the tighter the seat belt is, and in the driving process of the vehicle, the difference between the retraction amount of the seat belt worn by the passenger and the retraction amount when the seat belt is not worn by the passenger is large, accordingly, by comparing the number of the first pulse signals with the preset first pulse number threshold, whether the passenger wears the seat belt can be effectively discriminated, and therefore, whether the number of the first pulse signals is smaller than the preset first pulse number threshold is determined; and when the number of the first pulse signals is smaller than the first pulse number threshold value, sending out a safety belt unfastening prompt. Therefore, whether the vehicle passenger fastens the safety belt or not can be detected, the deceptive behavior of the safety belt which is not fastened can be identified, the safety belt unfastening prompt is sent when the safety belt is not fastened, and the safety of the vehicle is improved.
The embodiment of the invention provides a safety belt prompting method, as shown in fig. 4, comprising the following steps:
step 401, when the acceleration of a vehicle is greater than a preset acceleration threshold, controlling a retraction module to retract the safety belt, and acquiring the number of first pulse signals output by a signal output module within a preset time period, wherein the number of the first pulse signals is positively correlated with the retraction amount of the safety belt;
step 402, judging whether the number of the first pulse signals is smaller than a preset first pulse number threshold value;
and 403, sending a belt unfastening prompt when the number of the first pulse signals is smaller than the first pulse number threshold value.
An embodiment of the present invention provides another seat belt prompting method, as shown in fig. 5, where the method may be executed by the processing module 104 of the seat belt apparatus provided in the embodiment of the present invention, and the method includes:
Step 501, detecting whether a passenger is on the seat. Step 502 is executed when there is an occupant in the seat, and step 501 is executed when there is no occupant in the seat.
after the seatbelt apparatus is powered on, it may be determined whether an occupant is in a seat of the vehicle by querying the status of the occupancy sensor.
Step 502, detecting the states of a seat belt bolt and a seat belt buckle. When the belt tongue is connected to the belt buckle, step 503 is executed, and when the belt tongue is not connected to the belt buckle, step 502 is executed.
The state of the belt buckle tongue in latching with the belt may include a buckled state and an unbuckled state. One end of the safety belt is provided with a safety belt lock catch, a detection sensor can be arranged at the lock catch position and used for detecting whether a safety belt lock tongue is inserted into the safety belt lock catch, and usually, when the safety belt lock tongue is inserted into the safety belt lock catch, the detection sensor sends a corresponding indication signal to the processing module and is used for indicating that the safety belt lock tongue and the safety belt lock catch are in a buckling state.
And 503, rolling up the safety belt to a preset limited rolling-up amount according to a preset speed. Step 504 is performed.
In the embodiment of the invention, the preset speed is set according to specific conditions, and the speed is slow on the premise of not influencing the wearing comfort of passengers. The limited rolling amount is set according to specific conditions, and the length of the limited rolling amount is adaptively adjusted according to the body type of the passenger so as not to influence the wearing comfort of the passenger. For example, the predetermined length corresponding to a child is less than the predetermined length corresponding to an adult. When the safety belt is furled to the preset limited furling amount, the motor can automatically block rotation, and the furling action is stopped.
and step 504, acquiring the number of second pulse signals output by the signal output module in the process of winding the safety belt at the preset speed.
when the structure of the safety belt device is as shown in fig. 2, in the process of winding the safety belt at a preset speed, because the magnetic poles of the multi-pole magnetic ring are continuously changed in the rotating process, a plurality of magnetic signals are correspondingly generated, and the hall sensor converts the magnetic signals into a plurality of second pulse signals. And accumulating and counting the second pulse signals generated by the Hall sensor to obtain the number of the second pulse signals output by the signal output module in the process of winding the safety belt at the preset speed.
And 505, judging whether the number of the second pulse signals is smaller than a preset second pulse number threshold value. When the number of the second pulse signals is smaller than the preset second pulse number threshold, step 506 is executed. When the number of the second pulse signals is not less than the preset second pulse number threshold, step 507 is executed.
in the embodiment of the present invention, the second pulse number threshold may be a number determined in a situation where a passenger is in the seat in advance, the seat belt buckle is connected to the seat belt tongue, and the passenger does not actually wear the seat belt.
in practical applications, in a situation where there is a passenger in the seat and the seat belt buckle is connected to the seat belt tongue, and actually the passenger wears the seat belt, the number of the second pulse signals is usually hundreds of times, and if the passenger does not wear the seat belt, the number of the second pulse signals is usually within ten, which are obviously different from each other.
Step 506, sending out a belt unfastening prompt.
when the number of the second pulse signals is smaller than the preset second pulse number threshold value, the safety belt does not effectively protect the passenger. Even if the safety belt buckle is connected with the safety belt lock tongue, the safety belt fastening situation also belongs to the false safety belt fastening situation, and therefore the safety belt prompting method provided by the embodiment of the invention can effectively identify the false safety belt fastening situation.
In the embodiment of the invention, the processing module CAN send out the belt unfastening prompt through the CAN bus, and the prompt CAN be played in a sound form (such as warning sound, voice prompt and the like) or CAN be displayed on a display screen of the vehicle in a text or image form.
and step 507, detecting whether the acceleration state of the vehicle is larger than a preset acceleration threshold value. Step 508 is executed when the acceleration of the vehicle is greater than the preset acceleration threshold, and step 507 is executed when the acceleration of the vehicle is not greater than the preset acceleration threshold.
in the embodiment of the invention, the acceleration state of the vehicle can be acquired by querying the ESP, so as to detect whether the acceleration state of the vehicle is greater than a preset acceleration threshold.
and step 508, acquiring a first pulse signal output by the signal output module within a preset time period. Step 509 is performed. The preset time period may be a time period from when the acceleration of the vehicle is detected to be greater than a preset acceleration threshold until the stalling of the seat belt (which may be understood as the seat belt being retracted immovably, or the seat belt roll having received a certain retraction amount, which may be different from the defined retraction amount in the pretensioning process).
The signal output module is used for reflecting the tightness change of the safety belt in the winding process of the safety belt through output pulse signals.
Step 509, determining whether the number of the first pulse signals is smaller than a preset first pulse number threshold. When the number of the first pulse signals is less than the preset first pulse number threshold, step 506 is executed, and when the number of the first pulse signals is not less than the preset first pulse number threshold, step 508 is executed.
In the embodiment of the present invention, the first pulse number threshold may be a number determined in advance in a situation where the vehicle is running, the occupant is in the seat, the seatbelt buckle is connected to the seatbelt tongue, and the occupant does not actually wear the seatbelt.
During the running process of a vehicle and during braking, the ESP can detect that the acceleration exceeds a preset acceleration threshold value, so that the winding drum can be triggered to wind the safety belt, the multistage magnetic ring on the clutch assembly connected with the winding drum rotates synchronously, and the Hall sensor detects a first pulse signal and continuously accumulates and counts. In practical applications, the number of the first pulse signals determined in a situation where the occupant wears the seat belt is usually more than tens of times, and if the occupant does not wear the seat belt, the number of the first pulses is usually within ten (it can be understood that, in a situation where the occupant wears the seat belt, the seat belt is usually not fastened tightly, so that the change of the amount of take-up at take-up is large, and in a situation where the occupant does not fasten the seat belt, the seat belt is usually fastened tightly, so that the change of the amount of take-up at take-up is small), which are significantly different from each other. For example, the first pulse count threshold may be set to 5 or 10.
When the number of the first pulse signals in the preset time period is lower than the first pulse number threshold value, the safety belt does not effectively protect the passenger. Even if the safety belt buckle is connected with the safety belt lock tongue, the safety belt fastening situation also belongs to the false safety belt fastening situation, and therefore the safety belt prompting method provided by the embodiment of the invention can further effectively identify the false safety belt fastening situation.
in the embodiment of the invention, the processing module CAN send out the belt unfastening prompt through the CAN bus, and the prompt CAN be played in a sound form (such as warning sound and a voice prompt lamp) or CAN be displayed on a display screen of a vehicle in a text or image form.
In summary, in the seat belt prompting method provided in the embodiment of the present invention, when the acceleration of the vehicle is greater than the preset acceleration threshold, the seat belt is retracted, and the number of the first pulse signals output in the preset time period is obtained, since the greater the number of the first pulse signals indicates that the retraction amount of the seat belt is higher, the tighter the seat belt is, and in the vehicle driving process, the retraction amount of the seat belt worn by the passenger is greatly different from the retraction amount of the seat belt not worn by the passenger, whether the passenger fastens the seat belt can be effectively discriminated by comparing the number of the first pulse signals with the preset first pulse number threshold, so that whether the number of the first pulse signals is smaller than the preset first pulse number threshold is determined; and when the number of the first pulse signals is smaller than the first pulse number threshold value, sending out a safety belt unfastening prompt. Therefore, whether the vehicle passenger fastens the safety belt or not can be detected, the deceptive behavior of the safety belt which is not fastened can be identified, the safety belt unfastening prompt is sent when the safety belt is not fastened, and the safety of the vehicle is improved.
An embodiment of the present invention further provides a vehicle, including: the seatbelt apparatus 10 according to the embodiment of the present invention is provided. The vehicle may also include various modules in the circuit control schematic shown in fig. 3.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
it should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. a seatbelt apparatus, characterized in that the seatbelt apparatus is provided on a seat of a vehicle, the seatbelt apparatus comprising: a seat belt; the winding module is used for winding the safety belt; the signal output module is used for reflecting the winding amount of the safety belt in the winding process of the safety belt through output pulse signals; and a processing module for:
When the acceleration of the vehicle is greater than a preset acceleration threshold value, controlling the winding module to wind the safety belt, and acquiring the number of first pulse signals output by the signal output module within a preset time period, wherein the number of the first pulse signals is positively correlated with the winding amount of the safety belt;
Judging whether the number of the first pulse signals is smaller than a preset first pulse number threshold value or not;
And when the number of the first pulse signals is smaller than the first pulse number threshold value, sending out a safety belt unfastening prompt.
2. The seatbelt apparatus according to claim 1, wherein the processing module is further configured to:
when the acceleration of the vehicle is not detected, and a passenger is on the seat and the safety belt buckle is connected with the safety belt lock tongue, controlling the rolling module to roll the safety belt to a preset limited rolling amount according to a preset speed;
Acquiring the number of second pulse signals output by the signal output module in the process of rolling up the safety belt at a preset speed;
Judging whether the number of the second pulse signals is smaller than a preset second pulse number threshold value or not;
and when the number of the second pulse signals is smaller than the second pulse number threshold value, sending out a safety belt unfastening prompt.
3. the safety belt device according to claim 1 or 2, characterized in that the retraction module comprises: a motor, a transmission component, a clutch component and a tape winding drum,
the transmission assembly is respectively connected with the motor and the clutch assembly, the clutch assembly is connected with the belt winding drum, and the motor drives the transmission assembly to drive the clutch assembly to rotate so as to drive the belt winding drum to rotate, so that the belt winding drum winds the safety belt.
4. The seatbelt apparatus according to claim 3, wherein the signal output module comprises: a multi-pole magnetic ring and a magnetic field sensor,
The multi-pole magnetic ring is arranged on the outer side of the clutch assembly and can rotate coaxially with the clutch assembly;
the magnetic field sensor is arranged on the surface of the multi-pole magnetic ring, and when the clutch assembly rotates, the magnetic field sensor can acquire magnetic signals generated by magnetic pole changes when the multi-pole magnetic ring rotates and convert the magnetic signals into pulse signals to be output.
5. The seatbelt apparatus according to claim 4, wherein the magnetic field sensor is a Hall sensor.
6. The seatbelt apparatus according to claim 4, wherein the transmission assembly comprises: the driving gear is connected with the motor, and the transmission gear is meshed with the driving gear.
7. the seatbelt apparatus according to claim 6, wherein the clutch assembly is connected with the transmission gear through a gear;
An inclined sliding block is arranged between the clutch assembly and the belt winding drum, and when the motor drives the transmission assembly to drive the clutch assembly to rotate along a first preset direction, the clutch assembly is connected with the belt winding drum through the inclined sliding block and drives the belt winding drum to rotate along the first preset direction so as to wind the safety belt; when the motor drives the transmission assembly to drive the clutch assembly to rotate along a second preset direction, the clutch assembly is separated from the tape winding drum.
8. A seat belt reminder method, the method comprising:
when the acceleration of the vehicle is larger than a preset acceleration threshold value, controlling a winding module to wind the safety belt, and acquiring the number of first pulse signals output by a signal output module within a preset time period, wherein the number of the first pulse signals is positively correlated with the winding amount of the safety belt;
Judging whether the number of the first pulse signals is smaller than a preset first pulse number threshold value or not;
And when the number of the first pulse signals is smaller than the first pulse number threshold value, sending out a safety belt unfastening prompt.
9. The method of claim 8, further comprising:
when the acceleration of the vehicle is not detected, a passenger is in a seat, and a safety belt buckle is connected with a safety belt bolt, controlling the winding module to wind the safety belt to a preset limited winding amount according to a preset speed;
acquiring the number of second pulse signals output by the signal output module in the process of rolling up the safety belt at a preset speed;
judging whether the number of the second pulse signals is smaller than a preset second pulse number threshold value or not;
and when the number of the second pulse signals is smaller than the second pulse number threshold value, sending out a safety belt unfastening prompt.
10. A vehicle, characterized in that the vehicle comprises: the seat belt device according to any one of claims 1 to 7.
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| CN201610200721.6A CN107284404B (en) | 2016-03-31 | 2016-03-31 | Seat belt device, seat belt prompting method, and vehicle |
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| CN201610200721.6A CN107284404B (en) | 2016-03-31 | 2016-03-31 | Seat belt device, seat belt prompting method, and vehicle |
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|---|---|---|---|---|
| DE102018102724A1 (en) * | 2018-02-07 | 2019-08-08 | Autoliv Development Ab | Belt retractor and method for determining a seatbelt for a motor vehicle |
| CN108437928B (en) * | 2018-03-15 | 2021-07-30 | 上海艾铭思汽车控制***有限公司 | Control system and control method of safety belt |
| CN110217188A (en) * | 2019-07-02 | 2019-09-10 | 广州小鹏汽车科技有限公司 | A kind of exchange method, device and vehicle |
| CN110435587A (en) * | 2019-07-08 | 2019-11-12 | 宁波诚泰汽车部件有限公司 | A kind of automobile safety-belt untying-state system for prompting and method |
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