CN111267766B - Pedestrian protection system, method and vehicle comprising system - Google Patents
Pedestrian protection system, method and vehicle comprising system Download PDFInfo
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- CN111267766B CN111267766B CN202010149983.0A CN202010149983A CN111267766B CN 111267766 B CN111267766 B CN 111267766B CN 202010149983 A CN202010149983 A CN 202010149983A CN 111267766 B CN111267766 B CN 111267766B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
- B60R21/36—Protecting non-occupants of a vehicle, e.g. pedestrians using airbags
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Abstract
The invention discloses a pedestrian protection system for a vehicle, comprising: the system comprises a touch switch, a control unit and a control unit, wherein the touch switch is arranged on a center console screen of the vehicle and is configured to be operated by a user to start a pedestrian protection function on the vehicle in a usable state; a controller configured to acquire a switching state of the touch switch from the center console at predetermined intervals by means of a CAN bus technology and transmit the acquired switching state to an algorithm module, the switching state being a switching signal transmitted in a CAN message form; and an algorithm module configured to determine whether to activate a pedestrian protection function based on a switch state received from the controller, wherein the touch switch remains in an available state only if at least one of the following conditions is satisfied: the current vehicle speed is less than or equal to a predetermined value and within a predetermined period of time after ignition of the vehicle engine. The invention also discloses a corresponding pedestrian protection method and a vehicle comprising the pedestrian protection system.
Description
Technical Field
The present application relates to the field of vehicle safety, and more particularly, to a pedestrian protection system for a vehicle, a corresponding pedestrian protection method, and a vehicle including the pedestrian protection system.
Background
Nowadays, more and more vehicles are equipped with a Pedestrian Protection (PPS) function, which can provide effective protection for a collided pedestrian in the event of a traffic fault.
In the prior art, the PPS is controlled to be activated mainly by using a hard-wire switch. However, this method has the following problems: firstly, a hard-line switch and a wire harness need to be specially designed and developed, and the complexity of the vehicle integrated wire harness is increased; secondly, the installation position of the switch needs to be specially designed, the center console needs to be opened, and the cost is high; thirdly, the physical switch needs to be manually broken by a driver, and the operation experience is poor.
In addition, the triggering conditions that trigger the activation of the PPS function are too sensitive, which may cause the pedestrian protection system to be activated due to an abnormal collision, resulting in the need to replace system accessories, causing a loss to the vehicle owner. For example, when the vehicle head collides slightly or runs over a rough road surface, the pedestrian protection function may be accidentally/abnormally activated.
Disclosure of Invention
In order to solve the problems, the application provides a design scheme of a PPS soft switch based on a CAN bus technology, the switch is a virtual button arranged on a screen of a center console, the state of the virtual button CAN be sent to an Airbag Controller (ACU) through a CAN bus, and then the airbag controller CAN send the state to a PPS algorithm module through a preset algorithm interface, so that the algorithm module controls the starting of the PPS function of a vehicle based on the state.
According to a first aspect of the present invention, there is provided a pedestrian protection system for a vehicle, the system comprising: the system comprises a touch switch, a control unit and a control unit, wherein the touch switch is arranged on a center console screen of the vehicle and is configured to be operated by a user to start a pedestrian protection function on the vehicle in a usable state; the controller is configured to acquire the on-off state of the touch switch from the center console at preset intervals by means of a CAN bus technology and send the acquired on-off state to the algorithm module, wherein the on-off state is a switching signal sent in a CAN message form; and an algorithm module configured to determine whether to activate a pedestrian protection function on a vehicle based on a switch state received from the controller, wherein the touch switch remains in an available state only if at least one of the following conditions is satisfied: the current vehicle speed is less than or equal to a predetermined value and within a predetermined period of time after ignition of the vehicle engine.
Advantageously, the initial switch state of the touch switch at each ignition of the vehicle engine is set to be equal to the switch state at the last vehicle engine stall.
Advantageously, the algorithm module is configured to: and if the touch switch is in an on state, starting a pedestrian protection function on the vehicle.
Advantageously, the controller is an airbag controller.
Advantageously, said predetermined period of time is 5 minutes.
According to a second aspect of the present invention, there is provided a pedestrian protection method for a vehicle, the method comprising the steps of: determining whether the vehicle satisfies at least one of the following conditions: the current vehicle speed is less than or equal to a predetermined value and within a predetermined time period after ignition of the vehicle engine; keeping a touch switch arranged on a console screen of the vehicle in an available state under the condition that the vehicle meets at least one of the above conditions; acquiring the on-off state of the touch switch from a vehicle console at preset intervals by means of a CAN bus technology, wherein the on-off state is a switching signal transmitted in a CAN message form; and determining whether to activate a pedestrian protection function on the vehicle based on the acquired switch state.
Advantageously, if the touch switch is in an on state, a pedestrian protection function on the vehicle is activated.
Advantageously, the controller is an airbag controller.
Advantageously, said predetermined period of time is 5 minutes.
According to a third aspect of the invention, there is provided a vehicle comprising the pedestrian protection system described above.
Compared with the prior art, the PPS system and the method have the following advantages:
replacing the hard-wired switch with a CAN bus, adding only one switch signal to an existing CAN message, adding a PPS algorithm interface to an existing airbag controller, and calling the interface to execute a start judgment algorithm of the pedestrian protection function after the airbag controller receives the switch signal, so that the system CAN realize start control of the PPS function in a cost-effective manner;
the input control is realized by adding a virtual touch button on the screen of the existing center console, so that the cost is low and the operation is convenient;
the current vehicle speed is comprehensively considered in the enabling condition of the touch switch, so that the accidental starting of the PPS function caused by misoperation of a driver when the vehicle runs fast in a bumpy road condition is avoided; and
the ignition time of the engine (or the power-on time of the airbag controller) is comprehensively considered in the enabling condition of the touch switch, so that the PPS function is ensured to be started or closed by a driver when the driver starts driving, and the PPS function is prevented from being started randomly in the whole driving process.
Other features and advantages of the methods and systems of the present invention will be apparent from, or are more particularly, described in the accompanying drawings, which are incorporated herein, and in which specific embodiments are subsequently used to illustrate certain principles of the invention.
Drawings
Specific embodiments of the present invention will be further described with reference to the accompanying drawings, in which:
fig. 1 shows a block diagram of a pedestrian protection system according to an exemplary embodiment of the present invention; and
fig. 2 shows a flow chart of a pedestrian protection method according to an exemplary embodiment of the invention.
Detailed Description
A vehicle pedestrian protection method and system according to the present invention will be described below by way of embodiments with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention to those skilled in the art. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. Rather, it is contemplated that the invention may be practiced with any combination of the following features and elements, whether or not they relate to different embodiments. Thus, the following aspects, features, embodiments and advantages are merely illustrative and should not be considered elements or limitations of the claims except where explicitly recited in a claim(s).
Fig. 1 shows a block diagram of a Pedestrian Protection System (PPS) according to an exemplary embodiment of the present invention. As shown in fig. 1, the pedestrian protection system according to the embodiment includes a touch switch disposed on a center console screen of a vehicle for a user to operate to activate a pedestrian protection function on the vehicle.
The touch switch is operable (i.e., remains available) by a user only if at least one of the following conditions is met:
-the current vehicle speed is less than or equal to a predetermined value, e.g. the touch switch is kept disabled when the vehicle speed is too fast, thereby avoiding accidental activation of the PPS function due to driver misoperation when driving fast in rough road conditions; and
within a predetermined time period after ignition of the vehicle engine, for example, the touch switch is only available within 5 minutes of the start of the current driving cycle, beyond which time the airbag will keep the touch switch disabled by the controller, thereby avoiding inadvertent activation of the PPS function throughout the driving.
The vehicle center control station is connected in communication with a vehicle electronic control unit, which is preferably an airbag control unit in this context, by means of CAN bus technology. The determination of the "available/disabled" condition of the touch switch may be performed by the airbag controller, for example, the touch switch on the console screen may be maintained in an operable state each time the vehicle is ignited and the airbag controller is powered on, and the airbag controller may cause the touch switch on the console screen to assume a "grayed-out" state via the CAN bus when it is determined that the touch switch satisfies the disabled condition (the vehicle speed is too high and/or the ignition time exceeds a threshold value), thereby prohibiting the user from operating the touch switch.
According to a preferred embodiment, the vehicle center console screen has a memory function, CAN remember the state of the PPS function switch before the vehicle is turned off, and when the vehicle is powered on next time, the initial state of the touch switch is set to be the same state as that before the previous turn-off, and the initial state is sent to the airbag controller ACU in the form of a CAN message. When the ACU receives an initial switching signal sent by the console screen (the initial switching signal records the state of the PPS function before the last power failure memorized by the console screen), whether to close the PPS function or not is selected according to the signal. That is, the vehicle PPS function may adopt a state before the vehicle is turned off last time when the vehicle is ignited.
That is to say, the air bag controller can not record the operation habit of the user by itself, the PPS function is started by default when the ACU is powered on every time, and meanwhile, the vehicle central control system can execute an initialization process on the PPS function controlled by the ACU so as to ensure that the PPS function is consistent with the state when the ACU is powered off last time. For example, if the PPS function is in the off state before the vehicle is turned off, the center console screen initializes the PPS to the off state after the next vehicle power-on, and the ACU also turns off the PPS function of the vehicle accordingly after receiving the initialized state.
In the embodiment of the invention, a user can switch the PPS function to be turned on or off by operating a touch switch under a preset condition. For example, the touch switch may be enabled only when the current vehicle speed is less than or equal to a predetermined value and/or within a predetermined time period after ignition of the vehicle engine, and the touch switch may be operated by a user to control the PPS function to be turned on and off.
As shown in fig. 1, a switch signal indicating the on-off state of the touch switch may be added to a CAN message between the vehicle console and the airbag controller, and the airbag controller periodically obtains the current on-off state of the touch switch from the CAN message and transmits the current on-off state to the PPS algorithm module.
After receiving the switch state of the touch switch transmitted from the airbag controller, the PPS algorithm module may determine whether to activate the pedestrian protection function on the vehicle based on the switch state. If the switch state is 'off', the PPS function of the vehicle is not started; if the switch state is "on", the PPS function of the vehicle is started.
The system according to the present invention may also include a PPS actuator that automatically triggers the execution of a pedestrian protection operation in response to a vehicle collision event if the PPS function is activated. For example, the PPS actuators may be airbags, bumpers, impact beams, and other energy absorbing members (e.g., sponge bumpers) mounted at the front of the vehicle, which may effectively absorb energy generated by a collision by deforming, colliding, or displacing when the vehicle is involved in the collision, thereby protecting pedestrians from injury or reducing injury.
Fig. 2 shows a flow chart of a pedestrian protection method according to an exemplary embodiment of the invention. As shown in fig. 2, a specific work flow of the pedestrian protection method according to the present invention is described in detail below with reference to steps S101 to S106 in fig. 2.
When the cycle starts, first, in step S101, it is determined whether the vehicle satisfies a predetermined condition, which may include at least one of:
-the current vehicle speed is less than or equal to a predetermined value, e.g. the touch switch is kept disabled when the vehicle speed is too fast, thereby avoiding accidental activation of the PPS function due to driver misoperation when driving fast in rough road conditions; and
within a predetermined time period after ignition of the vehicle engine, for example, the touch switch is only available within 5 minutes of the start of the current driving cycle, beyond which time the airbag will keep the touch switch disabled by the controller, thereby avoiding inadvertent activation of the PPS function throughout the driving.
If the vehicle satisfies at least one of the above conditions, the touch switch provided on the vehicle console screen is kept in an available state (i.e., a state in which the user can operate) in which the user can control the on and off of the PPS function of the vehicle by operating the touch switch in step S102.
Conversely, if the vehicle does not satisfy at least one of the above conditions, the touch switch is disabled. I.e., to render it in a "gray-out state".
Subsequently, in step S103, the operating state of the touch switch, which is a switch signal transmitted in a CAN message form, is acquired from the vehicle console at predetermined intervals by means of the CAN bus technology, and the touch switch is disposed on the console screen.
Next, in step S104, it is determined whether or not the pedestrian protection function on the vehicle is activated based on the acquired switch state. Wherein, only when the touch switch is in an on state, the pedestrian protection function of the vehicle is started in step S105; otherwise, the pedestrian protection function of the vehicle is turned off in step S106.
In summary, the invention provides a design scheme of a PPS soft switch based on a CAN bus technology, the switch is a virtual button arranged on a screen of a center console, the state of the virtual button CAN be sent to an air bag safety controller (ACU) through a CAN bus, and then the air bag safety controller CAN send the state to a PPS algorithm module through a preset algorithm interface, so that the algorithm module controls the starting of the PPS function of a vehicle based on the state.
It is understood that, in one embodiment, step S101 and step S102 in fig. 2 may occur simultaneously, or step S102 may occur before step S101, i.e., each time the vehicle is ignited and powered on, the touch switch is activated and operable, because the condition that the ACU power-on time is less than the predetermined value is always satisfied.
Compared with the prior art, the PPS system provided by the invention has the following advantages:
replacing the hard-wired switch with a CAN bus, adding only one switch signal to an existing CAN message, adding a PPS algorithm interface to an existing airbag controller, and calling the interface to execute a start judgment algorithm of the pedestrian protection function after the airbag controller receives the switch signal, so that the system CAN realize start control of the PPS function in a cost-effective manner;
the input control is realized by adding a virtual touch button on the screen of the existing center console, so that the cost is low and the operation is convenient;
the current vehicle speed is comprehensively considered in the enabling condition of the touch switch, so that the accidental starting of the PPS function caused by misoperation of a driver when the vehicle runs fast in a bumpy road condition is avoided; and
the ignition time of the engine (or the power-on time of the airbag controller) is comprehensively considered in the enabling condition of the touch switch, so that the PPS function is ensured to be started or closed by a driver when the driver starts driving, and the PPS function is prevented from being started randomly in the whole driving process.
In the present application, one of ordinary skill in the art will appreciate that the disclosed system may be implemented in other ways. The above-described system embodiments are merely illustrative, for example, the division of the modules is only one logical division, and there may be other divisions in actual implementation, for example, the functions of a plurality of modules may be combined or the function of a module may be further split. Each module in the embodiments of the present application may be integrated into one processing unit, or each module may exist alone physically, or two or more modules may be integrated into one unit. The integrated module can be realized in a form of hardware or a form of a software functional unit.
In the embodiments of the methods of the present invention, the sequence numbers of the steps are not used to limit the sequence of the steps, and for those skilled in the art, the sequence of the steps is not changed without creative efforts.
Although the present invention has been described with reference to the preferred embodiments, it is not to be limited thereto. Various changes and modifications within the spirit and scope of the present invention will become apparent to those skilled in the art from this disclosure, and it is intended that the scope of the present invention be defined by the appended claims.
Claims (9)
1. A pedestrian protection system for a vehicle, comprising:
the system comprises a touch switch, a control unit and a control unit, wherein the touch switch is arranged on a center console screen of the vehicle and is configured to be operated by a user to start a pedestrian protection function on the vehicle in a usable state;
the controller is configured to acquire the on-off state of the touch switch from the center console at preset intervals by means of a CAN bus technology and send the acquired on-off state to the algorithm module, wherein the on-off state is a switching signal sent in a CAN message form; and
an algorithm module configured to determine whether to activate a pedestrian protection function on the vehicle based on the switch state received from the controller,
wherein the touch switch remains in an available state only if at least one of the following conditions is met:
-the current vehicle speed is less than or equal to a predetermined value, an
-within a predetermined period of time after ignition of the vehicle engine.
2. The pedestrian protection system according to claim 1, wherein an initial switch state of the touch switch at each ignition of the vehicle engine is set to be equal to a switch state at a last vehicle engine stall.
3. The pedestrian protection system of claim 1 or 2, wherein the algorithm module is configured to: and if the touch switch is in an on state, starting a pedestrian protection function on the vehicle.
4. A pedestrian protection system in accordance with claim 1 or 2 wherein the controller is an airbag controller.
5. A pedestrian protection system in accordance with claim 1 or 2, characterized in that the predetermined period of time is 5 minutes.
6. A pedestrian protection method for a vehicle, characterized by comprising the steps of:
determining whether the vehicle satisfies at least one of the following conditions:
-the current vehicle speed is less than or equal to a predetermined value, an
-within a predetermined period of time after ignition of the vehicle engine;
keeping a touch switch arranged on a console screen of the vehicle in an available state under the condition that the vehicle meets at least one of the above conditions;
acquiring the on-off state of the touch switch from a vehicle console at preset intervals by means of a CAN bus technology, wherein the on-off state is a switching signal transmitted in a CAN message form; and
whether to activate a pedestrian protection function on the vehicle is determined based on the acquired switch state.
7. The pedestrian protection method according to claim 6, wherein if the touch switch is in an on state, a pedestrian protection function on the vehicle is activated.
8. The pedestrian protection method according to claim 6 or 7, wherein the predetermined period of time is 5 minutes.
9. A vehicle comprising a pedestrian protection system according to any one of claims 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010149983.0A CN111267766B (en) | 2020-03-06 | 2020-03-06 | Pedestrian protection system, method and vehicle comprising system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010149983.0A CN111267766B (en) | 2020-03-06 | 2020-03-06 | Pedestrian protection system, method and vehicle comprising system |
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| CN111267766A CN111267766A (en) | 2020-06-12 |
| CN111267766B true CN111267766B (en) | 2021-03-12 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2815585B1 (en) * | 2000-10-19 | 2003-02-07 | Faurecia Sieges Automobile | ADJUSTING DEVICE FOR VEHICLE SEAT AND VEHICLE SYSTEM INCLUDING A SEAT EQUIPPED WITH SUCH A DEVICE |
| DE102007018468A1 (en) * | 2007-04-19 | 2008-10-23 | Robert Bosch Gmbh | Device and method for controlling personal protection devices |
| JP4842301B2 (en) * | 2008-07-01 | 2011-12-21 | 株式会社豊田中央研究所 | Pedestrian detection device and program |
| CN100572150C (en) * | 2008-07-07 | 2009-12-23 | 奇瑞汽车股份有限公司 | Pedestrian protection |
| CN104670149A (en) * | 2013-11-26 | 2015-06-03 | 陈训宏 | Automobile device capable of automatically protecting pedestrians |
| CN203805841U (en) * | 2014-04-14 | 2014-09-03 | 聊城大学 | Intelligent outside-automobile safety air bag device capable of protecting pedestrian |
| US20160207495A1 (en) * | 2015-01-20 | 2016-07-21 | Ford Global Technologies, Llc | Velocity based pedestrian sensing |
| CN206049597U (en) * | 2016-09-20 | 2017-03-29 | 北京新能源汽车股份有限公司 | A kind of pedestrian protection system and automobile |
| CN110395206A (en) * | 2019-07-26 | 2019-11-01 | 陕西汽车集团有限责任公司 | A kind of intelligent commercial vehicle front underrun protection device and working method |
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