CN104057825A - Device and method for preventing mistaken stepping of accelerator of vehicle - Google Patents
Device and method for preventing mistaken stepping of accelerator of vehicle Download PDFInfo
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- CN104057825A CN104057825A CN201310083942.6A CN201310083942A CN104057825A CN 104057825 A CN104057825 A CN 104057825A CN 201310083942 A CN201310083942 A CN 201310083942A CN 104057825 A CN104057825 A CN 104057825A
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- protocol conversion
- accelerator
- vehicle
- control unit
- conversion apparatus
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Abstract
The invention provides a device and a method for preventing mistaken stepping of an accelerator and belongs to the field of vehicle braking control. The device for preventing mistaken stepping of the accelerator comprises a protocol conversion device, a data acquisition and control unit and an accelerator relay, wherein the protocol conversion device is connected with an OBD (on-board diagnostics) II interface on a vehicle; the data acquisition and control unit is connected with the protocol conversion device and the accelerator relay respectively; the accelerator relay is arranged on an engine oil way of the vehicle. The device adopts a full electronic type, and the vehicle is not required to be transformed, that is, mechanical equipment or a sensor is not required to be installed on an accelerator pedal or a brake, so that the installation cost and the cost of mechanical parts are reduced.
Description
Technical field
The invention belongs to vehicle braking control field, be specifically related to a kind of device and method that prevents wrong step on the accelerator.
Background technology
Society, driving to go on a journey has become a kind of general mode of transportation, and the people who much begins to learn automobile is mishandling in the situation that running into road conditions complexity, accident, and mistaking accelerator becomes brake to step on, thereby caused a lot of accidents, brought the person and loss property to other people and household.
Existing anti-false step on device adopts mechanical system mostly, then the acceleration/accel that for example adopts acceleration pick-up detection throttle to step on will step on the throttle to move and change brake into by linkage moment, but these modes all need vehicle itself to transform, such as mechanical equipment or sensor (as acceleration pick-up) being installed again in Das Gaspedal or brake, this just causes may occurring producing due to Rig up error the situation of erroneous judgement.
Summary of the invention
The object of the invention is to solve the difficult problem existing in above-mentioned prior art, a kind of device and method that prevents wrong step on the accelerator is provided, the OBD interfacing of utilizing current most of automobile all to adopt, realizes the in the situation that of wrong step on the accelerator flame-out at once.
The present invention is achieved by the following technical solutions:
Prevent a device for wrong step on the accelerator, it comprises protocol conversion apparatus, data collection and control unit and throttle relay;
Described protocol conversion apparatus is connected with the OBDII interface on vehicle; Data collection and control unit is connected with throttle relay with protocol conversion apparatus respectively; Described throttle relay is arranged on the engine oil path of vehicle.
Described data collection and control unit sends sampling instruction by protocol conversion apparatus to described OBDII interface, and described OBDII interface is according to the rotary speed data of described sampling instruction acquisition vehicle, and rotary speed data is transferred to protocol conversion apparatus;
After described protocol conversion apparatus is changed the rotary speed data receiving, the rotary speed data after conversion is transferred to data collection and control unit;
Described data collection and control unit is controlled throttle relay according to the rotary speed data after conversion.
Described throttle relay is normally off, disconnects, and then block engine oil path when receiving the control command of sending data collection and control unit, makes vehicle flame-out.
Described protocol conversion apparatus adopts the protocol conversion device that has the protocol conversion device of serial ports or have USB interface.
Utilization prevents that the device realization of wrong step on the accelerator from preventing a method for wrong step on the accelerator, comprises the following steps:
(1): one end of described protocol conversion apparatus is connected to the OBDII interface of vehicle, described throttle relay is arranged in the engine oil path of vehicle; Make to prevent that throttle relay in the device of wrong step on the accelerator is in normally off;
(2): described data collection and control unit sends sampling instruction to protocol conversion apparatus, by protocol conversion apparatus, sampling instruction is issued to OBDII interface, thereby obtain present engine rotary speed data;
(3) described data collection and control unit is processed the rotary speed data collecting, and according to the result of processing, throttle relay is transmitted control signal;
(4) throttle relay receives after the control signal of sending data collection and control unit, disconnects, and then blocks engine oil path, makes vehicle flame-out.
Described step (3) is achieved in that
(31), ask for the difference of the engine speed data that every two continuous samplings arrive, then the threshold value of this difference and setting is compared;
(32), if this difference surpasses threshold value, transmit control signal to throttle relay, if this difference does not surpass threshold value, do not transmit control signal.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the present invention adopts full electronic, without vehicle itself is transformed, without in Das Gaspedal or brake, mechanical equipment or sensor being installed again, thereby has reduced the cost of installation and mechanics, and the simple installation of apparatus of the present invention.
(2) for user, can according to vehicle, require to adjust voluntarily the susceptibility of wrong step on the accelerator, namely can adjust vehicle rotating speed acceleration rate threshold.
Accompanying drawing explanation
Fig. 1 is acceleration and wrong step on the accelerator (throttle as brake stepped on) the formed vehicle rotation speed change figure of vehicle in normal driving process.
Fig. 2 is the structural representation (please the data collection and control system in Fig. 2 being revised as to data collection and control unit) that the present invention prevents the device of wrong step on the accelerator.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Vehicle accelerates in normal driving process, step on the action of step on the accelerator and relatively releive, even if urgent speed-raising can be as emergency braking yet moment step on.And mistaking accelerator becomes brake to step down and will engine speed be increased in moment." engine speed acceleration/accel " increases.As shown in Figure 1, acceleration in Fig. 1 in normal driving process is shown in dotted line, the formed vehicle rotating speed of wrong step on the accelerator is as shown in heavy black line, contrasting two curves can find out, acceleration and wrong step on the accelerator (throttle as brake stepped on) the formed vehicle rotation speed change of vehicle in normal driving process has obvious difference.
The present invention utilizes this principle, accurately and timely obtains this information, when vehicle engine speed acceleration/accel moment increase in the process of moving, and surpass while setting threshold value, to cut off oil circuit, and cause vehicle flame-out, to avoid or to reduce accident and the infringement causing due to mis-accelerator pressing.
Device of the present invention must be realized on the vehicle of following national OBDII technical interface, and OBD interface is that car running computer carries out the standard detection interface that vehicle failure, quantity discharged etc. are taken stopgap measures.Pattern/the service of OBD system output information comprises following content:
1, Mode1: request dynamical system current data (wherein comprise engine speed data, specifically please refer to OBDII agreement)
2, Mode2: the auspicious data of request for freezing
3, Mode3: the dynamical system diagnostic trouble code (DTC) that request discharge is relevant
4, Mode4: remove/reset the diagnostic message that discharge is relevant
5, Mode5: request exhaust gas oxygensensor monitoring test result
6, Mode6: ask discontinuous monitoring system OBD test result
7, Mode7: request continuous monitor system OBD test result
8, Mode8: Request Control onboard system, test or parts
9, Mode9: read vehicle and demarcate identifier.
The present invention prevent wrong step on the accelerator device concrete structure as shown in Figure 2, comprise protocol conversion apparatus, data collection and control unit and throttle relay;
Described protocol conversion apparatus is connected with the OBDII interface on vehicle; Data collection and control unit is connected with throttle relay with protocol conversion apparatus respectively; Described throttle relay is arranged on the engine oil path of vehicle.
Described data collection and control unit sends sampling instruction by protocol conversion apparatus to described OBDII interface, and described OBDII interface is according to the rotary speed data of described sampling instruction acquisition vehicle, and rotary speed data is transferred to protocol conversion apparatus;
After described protocol conversion apparatus is changed the rotary speed data receiving, the rotary speed data after conversion is transferred to data collection and control unit;
Described data collection and control unit is controlled throttle relay according to the rotary speed data after conversion.
Described throttle relay is normally off, disconnects, and then block engine oil path when receiving the control command of sending data collection and control unit, makes vehicle flame-out.
The Mode1 pattern that described OBDII interface is used in image data.
Described protocol conversion apparatus adopts the protocol conversion device that has the protocol conversion device of serial ports or have USB interface.
Described data collection and control unit adopts Programmable Logic Controller (PLC) to develop, first it send sampling instruction by serial ports to protocol conversion apparatus, the protocol conversion apparatus instruction of sampling again sends coefficient of dynamic force according to request instruction by OBDII interface, then rotary speed data data collection and control unit being returned is preserved, by data collection and control unit, calculate rotating speed acceleration/accel (being the value of rotation speed change difference/transformation period), and judge whether rotating speed acceleration/accel surpasses the threshold value of setting, if surpassed, being considered as is wrong step on the accelerator extremely, sending controling instruction is to throttle relay switch, make its disconnection, and then block engine oil path, thereby cause vehicle flame-out, if do not surpassed, do not carry out any operation.
The principle of work of apparatus of the present invention is as follows:
First, obtaining dynamical system current data from OBDII interface, because OBDII belongs to special purpose interface, is to utilize external protocol conversion device if want to gather the mode that wherein data are the easiest.Nowadays popular interface has three kinds: bluetooth approach, serial mode, usb mode.Protocol conversion device in the present invention adopts serial mode, and its advantage has two, first: due to institute's image data amount little, for K level (timing acquiring, each data that gather are no more than 1K byte) to compare with usb mode, the difficulty of developing is less, and technology maturation is higher.If data volume is excessive, need to consider to use usb mode.Secondly: from the reliability aspect connecting, wired mode is more reliable than wireless mode, and the possibility that is subject to radio frequency interference reduces greatly.What the protocol conversion device in the present invention adopted is the ELM327 serial equipment of supporting OBDII agreement.
In OBDII interface Real-time Obtaining dynamical system, the instruction of Vehicle Driving Cycle rotating speed has specific definition (to comprise the conversion of data and form etc. in ISO15031-5.), be summarized as follows:
Read engine speed rpm MODE 01 PID 0C
Send: 010C
＞01 0C
Return: 41 0C1A F8
1AF8 is 16 hex value of 2 bytes, and being converted to 10 system numbers is 6904, and every lattice 1/4rpm rotating speed is 6904/4=1726rpm
Serial ports by ELM327 sends instruction to OBDII interface, and baud rate is 38400B/S, a stop bit, and a bit check position, port numbers is COM1.
Data collection and control unit gathers engine speed by sending sampled signal, and the sampling period is Millisecond.
Data collection and control unit is handled as follows gathering the data of coming in:
One, ask the difference of every two engine speed continuous sampling values, then compare with threshold value '
Two, if the difference of engine speed continuous sampling value surpasses threshold value, in control system, transmit control signal to throttle relay, turn-off throttle, force vehicle stall until stop.
The using method of apparatus of the present invention specifically comprises the following steps:
Step 1: connect each hardware device, one end of ELM327 is connected to car running computer hardware interface, and (generally this interface is positioned at main driving bearing circle bottom left side body, this interface comprises OBDII interface), other end serial ports (com port) is connected on the serial ports of the protocol conversion apparatus in apparatus of the present invention; Make throttle relay in apparatus of the present invention in normally off;
Step 2: apparatus of the present invention (send request of data to protocol conversion apparatus, by protocol conversion apparatus ELM327, this request is issued to OBDII) send the request of data of Mode1 mode after powering up to car running computer.Thereby obtain present engine rotary speed information.And the data that request obtains at every turn are temporarily preserved.
During concrete enforcement, rotating speed turns following data 1,000 and will be considered as just having lighted a fire or low speed driving, and such sampled data is only kept in and do not done other processing.If rotating speed is more than 1,000, and suddenly raise at level time second intrinsic motivation rotating speed, show that steerman has been stepped on throttle and for sharply stepping on, data collection and control unit calculates the difference of every 2 sampling engine speeds that obtain, it is rotating speed acceleration/accel, if rotating speed acceleration/accel reaches after threshold value, carry out driver output, transmit control signal (being switching value signal) is to throttle relay.
Step 3: throttle relay receives that control signal moves, cuts off oil circuit, causes vehicle flame-out.
During actual use, user can adjust vehicle rotating speed acceleration rate threshold, specifically, for the driving of begining to learn Vehicle Driving Cycle, enters the student of steerman qualification (or also do not obtain), can be by this Threshold lower.Because it is all lower that beginner generally tramples the rotating speed acceleration/accel of throttle speed-raising, the situation generation rotating speed acceleration change of stepping on once wrong will be fairly obvious.For the chaufeur of skilled driving, can by the suitable raising of this threshold value some, so long as not rotating speed cataclysm, just can think that vehicle is normally giving it the gun.
In nowadays municipal highway traffic and express highway very flourishing today all, the trip of driving has become the form of riding instead of walk that people accept extensively.Every year due to throttle mistake, to step on caused traffic accident countless, brings very large hidden danger to people's safety of life and property, and GD-2 equipment provides an actv. solution for reducing from now on this type of event.To safeguarding that traffic safety has important practical meaning.
Technique scheme is one embodiment of the present invention, for those skilled in the art, the invention discloses on the basis of application process and principle, be easy to make various types of improvement or distortion, and be not limited only to the described method of the above-mentioned specific embodiment of the present invention, therefore previously described mode is just preferred, and does not have restrictive meaning.
Claims (6)
1. a device that prevents wrong step on the accelerator, is characterized in that: described in prevent that the device of wrong step on the accelerator from comprising protocol conversion apparatus, data collection and control unit and throttle relay;
Described protocol conversion apparatus is connected with the OBDII interface on vehicle; Data collection and control unit is connected with throttle relay with protocol conversion apparatus respectively; Described throttle relay is arranged on the engine oil path of vehicle.
2. the device that prevents wrong step on the accelerator according to claim 1, it is characterized in that: described data collection and control unit sends sampling instruction by protocol conversion apparatus to described OBDII interface, described OBDII interface is according to the rotary speed data of described sampling instruction acquisition vehicle, and rotary speed data is transferred to protocol conversion apparatus;
After described protocol conversion apparatus is changed the rotary speed data receiving, the rotary speed data after conversion is transferred to data collection and control unit;
Described data collection and control unit is controlled throttle relay according to the rotary speed data after conversion.
3. the device that prevents wrong step on the accelerator according to claim 2, is characterized in that: described throttle relay is normally off, when receiving the control command of sending data collection and control unit, disconnects.
4. the device that prevents wrong step on the accelerator according to claim 3, is characterized in that: described protocol conversion apparatus adopts the protocol conversion device that has the protocol conversion device of serial ports or have USB interface.
5. utilize the device that prevents wrong step on the accelerator described in claim 4 to realize a method that prevents wrong step on the accelerator, it is characterized in that: said method comprising the steps of:
(1), one end of described protocol conversion apparatus is connected to the OBDII interface of vehicle, described throttle relay is arranged in the engine oil path of vehicle; Make to prevent that throttle relay in the device of wrong step on the accelerator is in normally off;
(2), described data collection and control unit sends sampling instruction to protocol conversion apparatus, by protocol conversion apparatus, sampling instruction is issued to OBDII interface, thereby obtains present engine rotary speed data;
(3), described data collection and control unit is processed the rotary speed data collecting, and according to the result of processing, throttle relay is transmitted control signal;
(4), throttle relay receives after the control signal of sending data collection and control unit, disconnects, and then blocks engine oil path, makes vehicle flame-out.
6. method according to claim 5, is characterized in that: described step (3) is achieved in that
(31), ask for the difference of the engine speed data that every two continuous samplings arrive, then the threshold value of this difference and setting is compared;
(32), if this difference surpasses threshold value, transmit control signal to throttle relay, if this difference does not surpass threshold value, do not transmit control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310083942.6A CN104057825A (en) | 2013-03-18 | 2013-03-18 | Device and method for preventing mistaken stepping of accelerator of vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310083942.6A CN104057825A (en) | 2013-03-18 | 2013-03-18 | Device and method for preventing mistaken stepping of accelerator of vehicle |
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| Publication Number | Publication Date |
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| CN104057825A true CN104057825A (en) | 2014-09-24 |
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ID=51545857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310083942.6A Pending CN104057825A (en) | 2013-03-18 | 2013-03-18 | Device and method for preventing mistaken stepping of accelerator of vehicle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105034990A (en) * | 2015-09-11 | 2015-11-11 | 哈尔滨佰世盛达科技开发有限公司 | Automobile electronic throttle mis-treading preventing control device |
| CN105150847A (en) * | 2015-08-19 | 2015-12-16 | 武汉光谷西铂科技有限公司 | Protective device and method for preventing false start of vehicle |
| CN108799483A (en) * | 2018-07-06 | 2018-11-13 | 盛瑞传动股份有限公司 | The deliberately guard method of damage automatic transmission |
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| JP2006123878A (en) * | 2004-10-29 | 2006-05-18 | Akimitsu Tanahashi | System for preventing accident due to erroneous stepping on accelerator and brake |
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| CN102555903A (en) * | 2012-03-15 | 2012-07-11 | 北京科技大学 | Detection method for mistakenly pedaling of throttle pedal of automobile and detection device thereof |
| CN202357876U (en) * | 2011-09-27 | 2012-08-01 | 上海汽车集团股份有限公司 | Safety protection device and automobile |
| CN202669492U (en) * | 2012-03-21 | 2013-01-16 | 毛建平 | Electron gas accelerator controller emergency brake system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006123878A (en) * | 2004-10-29 | 2006-05-18 | Akimitsu Tanahashi | System for preventing accident due to erroneous stepping on accelerator and brake |
| CN101118694A (en) * | 2007-05-18 | 2008-02-06 | 李克明 | Vehicle intellectualized management system |
| CN202357876U (en) * | 2011-09-27 | 2012-08-01 | 上海汽车集团股份有限公司 | Safety protection device and automobile |
| CN102555903A (en) * | 2012-03-15 | 2012-07-11 | 北京科技大学 | Detection method for mistakenly pedaling of throttle pedal of automobile and detection device thereof |
| CN202669492U (en) * | 2012-03-21 | 2013-01-16 | 毛建平 | Electron gas accelerator controller emergency brake system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105150847A (en) * | 2015-08-19 | 2015-12-16 | 武汉光谷西铂科技有限公司 | Protective device and method for preventing false start of vehicle |
| CN105034990A (en) * | 2015-09-11 | 2015-11-11 | 哈尔滨佰世盛达科技开发有限公司 | Automobile electronic throttle mis-treading preventing control device |
| CN108799483A (en) * | 2018-07-06 | 2018-11-13 | 盛瑞传动股份有限公司 | The deliberately guard method of damage automatic transmission |
| CN108799483B (en) * | 2018-07-06 | 2020-11-06 | 盛瑞传动股份有限公司 | Protection method for intentionally damaging automatic transmission |
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Application publication date: 20140924 |