CN112140960A - Adaptive headrest control method and device for vehicle and vehicle - Google Patents
Adaptive headrest control method and device for vehicle and vehicleDownload PDFInfo
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- CN112140960A CN112140960ACN202011041932.2ACN202011041932ACN112140960ACN 112140960 ACN112140960 ACN 112140960ACN 202011041932 ACN202011041932 ACN 202011041932ACN 112140960 ACN112140960 ACN 112140960A
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- headrest
- driver
- head
- distance
- vehicle
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- 230000003044adaptive effectEffects0.000titleclaimsabstractdescription32
- 238000000034methodMethods0.000titleclaimsabstractdescription29
- 238000001514detection methodMethods0.000claimsdescription9
- 230000006378damageEffects0.000abstractdescription5
- 208000027418Wounds and injuryDiseases0.000description3
- 238000010586diagramMethods0.000description3
- 208000014674injuryDiseases0.000description3
- 208000028373Neck injuryDiseases0.000description2
- 239000010985leatherSubstances0.000description2
- 230000001133accelerationEffects0.000description1
- 238000005452bendingMethods0.000description1
- 230000000694effectsEffects0.000description1
- 238000009434installationMethods0.000description1
- 238000012986modificationMethods0.000description1
- 230000004048modificationEffects0.000description1
- 230000001960triggered effectEffects0.000description1
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Classifications
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/80—Head-rests
- B60N2/888—Head-rests with arrangements for protecting against abnormal g-forces, e.g. by displacement of the head-rest
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Seats For Vehicles (AREA)
Abstract
Description
Technical Field
The invention relates to the technical field of vehicle control, in particular to a vehicle adaptive headrest control method and device and a vehicle.
Background
The neck part of the automobile is often damaged when the automobile is in a collision accident, and particularly in rear-end low-speed collision, the damage rate is larger. The reason is that when the seat headrest is designed, in order to ensure the moving space of the head of the passenger, the head and the headrest have certain clearance. A large number of rear-end collisions research finds that when the head and the headrest exceed a certain distance, the head is greatly injured.
The existing headrest is provided with an ejection type active headrest, namely when the collision reaches the preset collision strength, a pre-tightening spring in the headrest is loosened, the headrest moves forwards, and the head of a passenger can be supported by the headrest in advance. However, in this method, the headrest is activated after the collision, and the forward moving distance of the headrest is fixed when the collision occurs, and the head-to-headrest distance is not fixed due to the differences of the height of the passenger and the driving habits, so that the danger occurs when the head-to-headrest distance is accidentally triggered or is too small.
Disclosure of Invention
In view of the above, the present invention is directed to a method for controlling a vehicle adaptive headrest to reduce the neck injury of a driver in a rear-end collision or other accidents.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an adaptive headrest control method of a vehicle, the method comprising: detecting an expected time to collision; detecting a distance of the headrest from a head of a driver; and when the expected collision occurrence time is less than or equal to a first preset time, controlling the headrest to move towards the head of the driver so that the distance between the headrest and the head of the driver is less than or equal to a first preset distance.
Further, in controlling the movement of the headrest toward the head of the driver, the method further includes: when the expected collision occurrence time is less than or equal to a second preset time, controlling the headrest to move towards the head of the driver so that the headrest contacts the head of the driver; and when the expected collision occurrence time is equal to 0, controlling the headrest to be locked.
Further, after controlling the headrest to move towards the head of the driver so that the distance between the headrest and the head of the driver is smaller than or equal to a first preset distance, the method further comprises the following steps: and controlling the headrest to return to the original position when the expected collision occurrence time is greater than a first preset time.
Further, the first preset time is 3 seconds, and the second preset time is 1.2 seconds.
Further, the distance between the headrest and the head of the driver is detected by a capacitive sensor made of a flexible film, which is installed in the headrest.
Compared with the prior art, the adaptive headrest control method of the vehicle has the following advantages:
firstly, detecting the expected collision occurrence time; then detecting the distance between the headrest and the head of the driver; and finally, when the expected collision occurrence time is less than or equal to a first preset time, controlling the headrest to move towards the head of the driver so that the distance between the headrest and the head of the driver is less than or equal to a first preset distance. The invention can shorten the distance between the head and the headrest before a collision accident occurs, ensures that the headrest does not collide the head of a passenger, and reduces the injury of the neck of a driver caused by over bending in the accidents such as rear-end collision and the like.
Another object of the present invention is to provide an adaptive headrest control apparatus for a vehicle to reduce injury to the neck of a driver in the event of a rear-end collision or the like.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an adaptive headrest control apparatus of a vehicle, the apparatus comprising: the collision detection device comprises a detection unit and a control unit, wherein the detection unit is used for detecting the expected collision occurrence time; detecting a distance of the headrest from a head of a driver; the control unit is used for controlling the headrest to move towards the head of the driver when the expected collision occurrence time is less than or equal to a first preset time, so that the distance between the headrest and the head of the driver is less than or equal to a first preset distance.
Further, the control unit is configured to: when the expected collision occurrence time is less than or equal to a second preset time, controlling the headrest to move towards the head of the driver so that the headrest contacts the head of the driver; and when the expected collision occurrence time is equal to 0, controlling the headrest to be locked.
Further, after controlling the headrest to move toward the head of the driver so that the distance between the headrest and the head of the driver is less than or equal to a first preset distance, the control unit is configured to: and controlling the headrest to return to the original position when the expected collision occurrence time is greater than a first preset time.
Further, the distance between the headrest and the head of the driver is detected by a capacitive sensor made of a flexible film, which is installed in the headrest.
Compared with the prior art, the vehicle adaptive headrest control device and the vehicle adaptive headrest control method have the same advantages, and are not repeated herein.
Another object of the present invention is to provide a vehicle to reduce the neck injury of the driver in the event of a rear-end collision or the like.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle comprising an adaptive headrest control apparatus of the vehicle described above.
Compared with the prior art, the vehicle and the adaptive headrest control method of the vehicle have the same advantages, and are not described again.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of an adaptive headrest control method of a vehicle according to an embodiment of the present invention;
fig. 2 is a flowchart of an adaptive headrest control method of a vehicle according to another embodiment of the present invention;
fig. 3 is a schematic structural view of a headrest according to an embodiment of the present invention;
fig. 4 is a block diagram showing a configuration of an adaptive headrest control apparatus for a vehicle according to an embodiment of the present invention.
Description of reference numerals:
1detection unit 2 control unit
Detailed Description
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 1 is a flowchart of an adaptive headrest control method for a vehicle according to an embodiment of the present invention. As shown in fig. 1, the method includes:
step S11, detecting an expected collision occurrence time;
for example, the method of performing the embodiment of the present invention should satisfy the conditions that a driver should be detected in the driving seat first, whether the driver is present or not can be detected by, for example, a pressure sensor mounted on a vehicle seat, and then an automatic mode of automatically moving the headrest should be detected to be turned on. In addition, it is necessary to receive a signal indicating the relative speed of the host vehicle and the nearby vehicle detected by an automatic Braking system (AEB) to indicate that the two vehicles are approaching each other. The method of the present embodiment may be performed when two vehicles are coming closer together and may send a collision.
Then, when a collision is likely to occur, the expected collision occurrence time can be detected by AEB, the principle of which is calculated by the following kinematic formula:
0.5×a×t2+ v × t + d0 ═ dt, where,
a is the relative acceleration of the two vehicles, t is the time (when dt is 0, t is the expected Time To Collision (TTC)); v is the relative velocity of the two vehicles, d0 is the current relative distance of the two vehicles, and dt is the relative distance of the two vehicles after t seconds. D0, v and a are monitored by the AEB system through a camera or a millimeter wave radar, dt in the formula is assumed to be 0 (namely collision occurs), and at the moment, the TTC can be solved through the above formula.
Step S12, detecting the distance between the headrest and the head of the driver;
for example, the distance of the headrest from the head of the driver may be detected by a capacitive sensor made of a flexible film, which is installed in the headrest, and the specific installation position and structure will be described in detail below. In the embodiment of the invention, the distance between the headrest and the head of the driver needs to be detected in real time, and the distance between the headrest and the head of the driver changes along with the movement of the headrest.
And step S13, when the expected collision occurrence time is less than or equal to a first preset time, controlling the headrest to move towards the head of the driver so that the distance between the headrest and the head of the driver is less than or equal to a first preset distance.
For example, the first preset time may be 3 seconds, and the first preset distance may preferably be 35mm, but is not limited thereto. When the expected collision occurrence time is less than or equal to the first preset time, the possibility of collision of the vehicle is indicated, and at the moment, the headrest is required to be automatically moved towards the head of the driver, and the distance between the headrest and the head of the driver is required to be reduced so as to prepare for collision. However, when the headrest is relatively close to the head of the driver, for example, when the value of the capacitance sensor is greater than or equal to 30, it indicates that the headrest has reached the desired position, and the headrest may not be moved.
It is understood that if the expected collision occurrence time is greater than the first preset time or one of the above conditions is not satisfied, the manual mode of the headrest is entered and the movement of the headrest is manually operated by the driver.
Fig. 2 is a flowchart of an adaptive headrest control method for a vehicle according to another embodiment of the present invention. As shown in fig. 2, the method includes:
step S21, detecting an expected collision occurrence time;
step S22, detecting the distance between the headrest and the head of the driver;
step S23, judging whether the expected collision occurrence time is less than or equal to a first preset time and greater than a second preset time;
and step S24, when the expected collision occurrence time is less than or equal to a first preset time and greater than a second preset time, controlling the headrest to move towards the head of the driver so that the distance between the headrest and the head of the driver is less than or equal to a first preset distance.
The embodiments of the above steps S21-S24 are similar to the above, and are not repeated herein.
Step S25, when the expected collision occurrence time is less than or equal to a second preset time, controlling the headrest to move towards the head of the driver so that the headrest contacts the head of the driver;
for example, if the expected collision occurrence time continues to be shortened, i.e., less than the second preset time (preferably, but not limited to, the second preset time being 1.2 seconds) after the distance between the headrest and the driver's head is reduced to the first preset distance, or there is an emergency situation such that the expected collision occurrence time is directly less than the second preset time, it will not be possible to merely reduce the distance between the headrest and the driver's head to the first preset distance, but it will be necessary to continue to be shortened until the headrest contacts the driver's head (or the distance 3mm ± 2mm) in order to cope with the impending collision. However, when the headrest is very close to the head of the driver, for example, the value of the capacitive sensor is greater than or equal to 80, it is indicated that the headrest is only a small distance, for example, 3mm ± 2mm, from the head of the driver, and the headrest may not be moved.
And step S26, when the expected collision occurrence time is equal to 0, controlling the headrest to be locked.
For example, after step S25, if the expected collision occurrence time is equal to 0, a collision occurs at this time, and therefore the headrest is locked to protect the driver. It will be appreciated that the head restraint can be directly locked if a very urgent situation occurs, i.e. when a collision directly occurs resulting in no movement of the head restraint. If it is desired to unlock the headrest, the unlock button may be pressed for a long preset time (e.g., 3 seconds) to effect unlocking, or the vehicle may be powered up again.
And step S27, controlling the headrest to return to the original position when the expected collision occurrence time is greater than a first preset time.
For example, after step S24, if no risk of collision is found, i.e., the expected collision occurrence time is greater than the first preset time, the headrest may be controlled to return to the home position.
Fig. 3 is a schematic structural diagram of a headrest according to an embodiment of the present invention. As shown in fig. 3, a motor and a Micro Controller Unit (MCU) are provided in the headrest, the motor may be used to move the headrest up and down or forward and backward, and the MCU may be used to control the motor to move the headrest. The outermost layer of the headrest is leather, and a capacitance sensor made of a flexible film is arranged behind the leather. Due to the adoption of the flexible film, no other injury is caused to the passengers in collision, and holes do not need to be formed in the surface of the headrest.
Fig. 4 is a block diagram showing a configuration of an adaptive headrest control apparatus for a vehicle according to an embodiment of the present invention. As shown in fig. 4, the apparatus includes: the collision detection device comprises adetection unit 1 and acontrol unit 2, wherein thedetection unit 1 is used for detecting the expected collision occurrence time; detecting a distance of the headrest from a head of a driver; thecontrol unit 2 is configured to control the headrest to move towards the head of the driver when the expected collision occurrence time is less than or equal to a first preset time, so that the distance between the headrest and the head of the driver is less than or equal to a first preset distance.
Further, after controlling the headrest to move towards the head of the driver so that the distance between the headrest and the head of the driver is less than or equal to a first preset distance, thecontrol unit 2 is configured to: when the expected collision occurrence time is less than or equal to a second preset time, controlling the headrest to move towards the head of the driver so that the headrest contacts the head of the driver; and when the expected collision occurrence time is equal to 0, controlling the headrest to be locked.
Further, thecontrol unit 2 is configured to: and controlling the headrest to return to the original position when the expected collision occurrence time is greater than a first preset time.
Further, the distance between the headrest and the head of the driver is detected by a capacitive sensor made of a flexible film, which is installed in the headrest.
Embodiments of the present invention also provide a vehicle including the adaptive headrest control apparatus of the vehicle described above.
The embodiments of the adaptive headrest control apparatus for a vehicle and the vehicle described above are similar to the embodiments of the adaptive headrest control method for a vehicle described above, and are not described again here.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. An adaptive headrest control method of a vehicle, characterized by comprising:
detecting an expected time to collision;
detecting a distance of the headrest from a head of a driver;
and when the expected collision occurrence time is less than or equal to a first preset time, controlling the headrest to move towards the head of the driver so that the distance between the headrest and the head of the driver is less than or equal to a first preset distance.
2. The adaptive headrest control method of a vehicle according to claim 1, characterized by further comprising:
when the expected collision occurrence time is less than or equal to a second preset time, controlling the headrest to move towards the head of the driver so that the headrest contacts the head of the driver;
and when the expected collision occurrence time is equal to 0, controlling the headrest to be locked.
3. The adaptive headrest control method of a vehicle according to claim 1, wherein after controlling the headrest to move toward the head of the driver so that the distance between the headrest and the head of the driver is equal to or less than a first preset distance, the method further comprises:
and controlling the headrest to return to the original position when the expected collision occurrence time is greater than a first preset time.
4. The adaptive headrest control method of a vehicle according to claim 2, wherein the first preset time is 3 seconds and the second preset time is 1.2 seconds.
5. The adaptive headrest control method of a vehicle according to claim 1, wherein a distance of the headrest from a driver's head is detected by a capacitive sensor made of a flexible film, the capacitive sensor being installed in the headrest.
6. An adaptive headrest control apparatus for a vehicle, characterized by comprising:
a detection unit and a control unit, wherein,
the detection unit is used for detecting the expected collision occurrence time; detecting a distance of the headrest from a head of a driver;
the control unit is used for controlling the headrest to move towards the head of the driver when the expected collision occurrence time is less than or equal to a first preset time, so that the distance between the headrest and the head of the driver is less than or equal to a first preset distance.
7. The adaptive headrest control apparatus for a vehicle according to claim 6, characterized in that the control unit is configured to:
when the expected collision occurrence time is less than or equal to a second preset time, controlling the headrest to move towards the head of the driver so that the headrest contacts the head of the driver;
and when the expected collision occurrence time is equal to 0, controlling the headrest to be locked.
8. The adaptive headrest control device for a vehicle according to claim 6, wherein after controlling the headrest to move toward the head of the driver so that the distance between the headrest and the head of the driver is equal to or less than a first preset distance, the control unit is configured to:
and controlling the headrest to return to the original position when the expected collision occurrence time is greater than a first preset time.
9. The adaptive headrest control apparatus for vehicles according to claim 6, wherein a distance of the headrest from a driver's head is detected by a capacitive sensor made of a flexible film, the capacitive sensor being installed in the headrest.
10. A vehicle characterized by comprising an adaptive headrest control apparatus of the vehicle claimed in any one of claims 6 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011041932.2ACN112140960A (en) | 2020-09-28 | 2020-09-28 | Adaptive headrest control method and device for vehicle and vehicle |
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| CN202011041932.2ACN112140960A (en) | 2020-09-28 | 2020-09-28 | Adaptive headrest control method and device for vehicle and vehicle |
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Cited By (1)
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| CN113103937A (en)* | 2021-04-30 | 2021-07-13 | 东风汽车集团股份有限公司 | Method and system for controlling active headrest in rear-end collision and vehicle |
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