CN103253134A - Data collecting and controlling system and application thereof - Google Patents
Data collecting and controlling system and application thereof Download PDFInfo
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- CN103253134A CN103253134A CN2013101506957A CN201310150695A CN103253134A CN 103253134 A CN103253134 A CN 103253134A CN 2013101506957 A CN2013101506957 A CN 2013101506957A CN 201310150695 A CN201310150695 A CN 201310150695A CN 103253134 A CN103253134 A CN 103253134A
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- output circuit
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Abstract
The invention provides a data collecting and controlling system and application of the data collecting and controlling system and belongs to the field of vehicle brake control. The data collecting and controlling system is applicable to a device preventing a driver from wrongly stepping on an accelerator. The device preventing the driver from wrongly stepping on the accelerator comprises a protocol conversion device and an accelerator relay. The data collecting and controlling system comprises a power source circuit, a serial port, a single-chip microcomputer CPU and memory unit, a driving output circuit and a relay output circuit, wherein the power source circuit is used for supplying a power source, the serial port is used for being connected with the protocol conversion device, the driving output circuit is used for amplifying a signal, and the relay output circuit is used for being connected with the accelerator relay.
Description
Technical field
The invention belongs to the vehicle braking control field, be specifically related to a kind of data acquisition and control system and application thereof.
Background technology
Current 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 under the situation that runs 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 for other people and household.
Existing anti-false step on device adopts mechanical system mostly, the acceleration/accel that for example adopts acceleration pick-up detection throttle to step on will be stepped on the throttle then to move and be changed brake into by linkage moment, but these modes all need vehicle itself is transformed, such as in Das Gaspedal or brake mechanical equipment or sensor (as acceleration pick-up) being installed again, this may occur owing to the improper situation that produces erroneous judgement is installed with regard to causing.
Summary of the invention
The objective of the invention is to solve a difficult problem that exists in the above-mentioned prior art, a kind of data acquisition and control system and application thereof are provided, the OBD interfacing of utilizing current most of automobile all to adopt is implemented under the situation of wrong step on the accelerator flame-out at once.
The present invention is achieved by the following technical solutions:
A kind of data acquisition and control system, be used for preventing the device of wrong step on the accelerator, the described device of wrong step on the accelerator that prevents comprises protocol conversion apparatus and throttle relay, and described data acquisition and control system comprise power circuit, serial ports, singlechip CPU and memory cell, driving output circuit and relay output circuit;
Described power circuit is used for providing power supply;
Described serial ports is used for being connected with protocol conversion apparatus;
Described driving output circuit is used for amplifying signal;
Described relay output circuit is used for being connected with the throttle relay.
Described data acquisition and control system further comprise house dog, are used for the monitoring total system.
Described data acquisition and control system at first send the sampling instruction by serial ports to protocol conversion apparatus, protocol conversion apparatus will be sampled to instruct again and be sent coefficient of dynamic force according to request instruction by the OBDII interface, receive rotary speed data that protocol conversion apparatus transmission comes then and store by memory cell, calculate the rotating speed acceleration/accel by singlechip CPU again, and handle according to the rotating speed acceleration/accel.
Describedly calculate the rotating speed acceleration/accel by singlechip CPU, and handle according to the rotating speed acceleration/accel and may further comprise the steps:
(1) ask the difference of per two engine speed continuous sampling values, this difference is the rotating speed acceleration/accel;
(2) judge whether the rotating speed acceleration/accel surpasses predefined fault value, if surpass, then by driving output circuit and relay output circuit sending controling instruction to the throttle relay switch, block engine oil path, thereby cause vehicle flame-out, if do not surpass, then do not carry out any operation.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the present invention adopts full electronic, need not vehicle itself is transformed, and namely need not in Das Gaspedal or brake, mechanical equipment or sensor to be installed again, thereby reduced the cost of installation and mechanics, and the simple installation of apparatus of the present invention.
(2) for the user, can require to adjust voluntarily the susceptibility of wrong step on the accelerator according to vehicle, just can adjust vehicle rotating speed acceleration rate threshold.
Description of drawings
Fig. 1 is the structural representation of data acquisition of the present invention and control system.
Fig. 2 is acceleration and wrong step on the accelerator (namely throttle as brake stepped on) the formed vehicle rotation speed change figure of vehicle in normal driving process.
Fig. 3 is to use the structural representation of the device of data acquisition of the present invention and control system
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail:
Vehicle accelerates in normal driving process, steps on the action of step on the accelerator and relatively releives, even if urgent speed-raising can not stepped on as emergency braking moment yet.And mistaking accelerator becomes brake to step down and will engine speed be increased in moment.Namely " engine speed acceleration/accel " increases.As shown in Figure 2, acceleration among Fig. 2 in the normal driving process is shown in dotted line, the formed vehicle rotating speed of wrong step on the accelerator is shown in heavy black line, contrast two curves as can be seen, acceleration and wrong step on the accelerator (namely 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 when setting threshold value, to cut off oil circuit, and cause vehicle flame-out, to avoid or to reduce because accident and the infringement that mis-accelerator pressing causes.
The structure of described data acquisition and control system comprises power circuit, serial ports, house dog, singlechip CPU and memory cell, driving output circuit and relay output circuit as shown in Figure 1.
Data acquisition and control system adopt micro controller system to develop, this equipment at first sends the sampling instruction by serial ports (being the serial ports COM among Fig. 1) to protocol conversion apparatus, protocol conversion apparatus will be sampled to instruct again and be sent coefficient of dynamic force according to request instruction by the OBDII interface, the rotary speed data that data acquisition and control system are returned is preserved then, calculate rotating speed acceleration/accel (being the value of rotation speed change difference/transformation period) by micro controller system, and judge whether the rotating speed acceleration/accel surpasses the fault value of setting, if surpass, then being considered as is wrong step on the accelerator unusually, sending controling instruction is to the throttle relay switch, block engine oil path, thereby cause vehicle flame-out, if do not surpass, then do not carry out any operation.
Data acquisition of the present invention and control system are carried out following processing to gathering the data of coming in:
One, ask the difference of per two engine speed continuous sampling values, compare with threshold value then '
Two, if the difference of engine speed continuous sampling value surpasses threshold value then transmits control signal to the throttle relay, turn-off throttle in control system, force vehicle stall until parking.
Data acquisition of the present invention and control system are to use and are preventing on the device of wrong step on the accelerator, prevent wrong step on the accelerator device concrete structure as shown in Figure 3, comprise protocol conversion apparatus, data acquisition and control system and throttle relay.
Described protocol conversion apparatus is connected with OBDII interface on the vehicle; Data acquisition and control system are connected with the throttle relay with protocol conversion apparatus respectively; Described throttle relay is arranged on the engine oil path of vehicle.
Data acquisition of the present invention and control system send the 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 was changed the rotary speed data that receives, the rotary speed data after root will be changed was transferred to data acquisition and control system;
Described data acquisition and control system are controlled the throttle relay according to the rotary speed data after changing.
Described throttle relay is normally open, then disconnects when receiving the control command that data data acquisition and control system send, and then blocks engine oil path, makes vehicle flame-out.
The Mode1 pattern that described OBDII interface uses 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.
The device that prevents wrong step on the accelerator must realize that the OBD interface is that car running computer carries out the standard detection interface that vehicle failure, quantity discharged etc. are taken stopgap measures at the vehicle of following national OBDII technical interface.Pattern/the service of OBD system output information comprises following content:
1, Mode1: request dynamical system current data (wherein comprising engine speed data, specifically please referring to the OBDII agreement)
2, Mode2: the auspicious data of request for freezing
3, Mode3: the relevant dynamical system diagnostic trouble code (DTC) of request discharging
4, Mode4: remove/reset the relevant diagnostic message of discharging
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 principle of work of device that prevents wrong step on the accelerator is as follows:
At first, obtaining the dynamical system current data from the 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.Apparatus of the present invention adopt serial mode, and its advantage has two, at first: because institute's image data amount and little, be K level (timing acquiring, each data of gathering are no more than the 1K byte) to compare with usb mode, the difficulty of developing is less, and technology maturation is higher.Need consider to use usb mode if data volume is excessive.Secondly: from the reliability aspect that connects, wired mode is more reliable than wireless mode, and the possibility that is subjected to radio frequency interference reduces greatly.This installs employed serial mode equipment for supporting the ELM327 serial equipment of OBDII.
Obtaining the travel instruction of rotating speed of vehicle in the dynamical system in real time by the OBDII interface 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 0C 1A F8
1AF8 is 16 hex value of 2 bytes, and being converted to 10 system numbers is 6904, every lattice 1/4rpm
Rotating speed is 6904/4=1726rpm
Serial ports by ELM327 sends instruction to the OBDII interface, and baud rate is 38400B/S, a stop bit, and a bit check position, port numbers is COM1.
Data acquisition of the present invention and control system receive the rotary speed data that protocol conversion apparatus transmits, and send the sampling instruction to protocol conversion apparatus, and data acquisition simultaneously and control system are controlled the throttle relay.Data acquisition and control system are gathered engine speed, and the sampling period is Millisecond.Data acquisition and control system do not need again to adopt into signal carries out analogue to digital conversion because what import into by the OBDII interface has been exactly digital signal.This digital signal hexadecimal representation.
The using method that prevents the device of wrong step on the accelerator specifically may further comprise the steps:
Step 1: connect each hardware device, the end of ELM327 is connected to car running computer hardware interface (generally this interface is positioned at the main bearing circle bottom left side body of driving), and other end serial ports (com port) is connected on the serial ports of the protocol conversion apparatus in apparatus of the present invention; Make the throttle relay in apparatus of the present invention be in normally off;
Step 2: apparatus of the present invention are powering up the back sends request of data from the Mode1 mode to car running computer.Thereby obtain the present engine rotary speed information.And the data that will at every turn ask to obtain are temporarily preserved.The data of rotating speed below 1,000 commentaries on classics 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 raise suddenly at level time second intrinsic motivation rotating speed, show then that steerman has been stepped on throttle and for sharply stepping on, data acquisition and control system are calculated per 3 sampling engine speed acceleration/accels that obtain, the rotating speed acceleration/accel then drives output after reaching threshold value, and transmit control signal (being the switching value signal) gives the throttle relay.
Step 3: the throttle relay receives that control signal moves, and cuts off oil circuit, causes vehicle flame-out.
During actual the use, the user can adjust vehicle rotating speed acceleration rate threshold, and specifically, for begining to learn the steerman that vehicle the travels student of steerman qualification (or also do not obtain), that this threshold value can be set is low.Because it is all lower that the beginner generally tramples the rotating speed acceleration/accel of throttle speed-raising, in case the wrong situation generation rotating speed acceleration change of stepping on will be fairly obvious.For the chaufeur of skilled driving, raising that can this threshold value is suitable some, just can think that so long as not the rotating speed cataclysm vehicle is normally giving it the gun.
In municipal highway traffic nowadays and express highway very flourishing today all, driving to go on a journey has become the form of riding instead of walk that people accept extensively.It is countless that annual because throttle mistake is stepped on the traffic accident that causes, and brings very big hidden danger for people's safety of life and property, and GD-2 equipment provides an actv. solution for reducing this type of event from now on.To safeguarding that traffic safety has important practical meaning.
Technique scheme is one embodiment of the present invention, for those skilled in the art, on the basis that the invention discloses 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 (4)
1. a data acquisition and control system, be used for preventing the device of wrong step on the accelerator, the described device of wrong step on the accelerator that prevents comprises protocol conversion apparatus and throttle relay, and it is characterized in that: described data acquisition and control system comprise power circuit, serial ports, singlechip CPU and memory cell, driving output circuit and relay output circuit;
Described power circuit is used for providing power supply;
Described serial ports is used for being connected with protocol conversion apparatus;
Described driving output circuit is used for amplifying signal;
Described relay output circuit is used for being connected with the throttle relay.
2. data acquisition according to claim 1 and control system, it is characterized in that: described data acquisition and control system further comprise house dog, are used for the monitoring total system.
3. the using method of a claim 1 or 2 described data acquisitions and control system, it is characterized in that: described data acquisition and control system at first send the sampling instruction by serial ports to protocol conversion apparatus, protocol conversion apparatus will be sampled to instruct again and be sent coefficient of dynamic force according to request instruction by the OBDII interface, receive rotary speed data that protocol conversion apparatus transmission comes then and store by memory cell, calculate the rotating speed acceleration/accel by singlechip CPU again, and handle according to the rotating speed acceleration/accel.
4. method according to claim 3 is characterized in that: describedly calculate the rotating speed acceleration/accel by singlechip CPU, and handle according to the rotating speed acceleration/accel and may further comprise the steps:
(1) ask the difference of per two engine speed continuous sampling values, this difference is the rotating speed acceleration/accel;
(2) judge whether the rotating speed acceleration/accel surpasses predefined fault value, if surpass, then by driving output circuit and relay output circuit sending controling instruction to the throttle relay switch, block engine oil path, thereby cause vehicle flame-out, if do not surpass, then do not carry out any operation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101506957A CN103253134A (en) | 2013-04-27 | 2013-04-27 | Data collecting and controlling system and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101506957A CN103253134A (en) | 2013-04-27 | 2013-04-27 | Data collecting and controlling system and application thereof |
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| CN103253134A true CN103253134A (en) | 2013-08-21 |
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| CN2013101506957A Pending CN103253134A (en) | 2013-04-27 | 2013-04-27 | Data collecting and controlling system and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN202033886U (en) * | 2011-03-22 | 2011-11-09 | 江苏天泽环保科技有限公司 | Data acquisition and transmission instrument |
| 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 |
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2013
- 2013-04-27 CN CN2013101506957A patent/CN103253134A/en active Pending
Patent Citations (6)
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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 |
| CN101118694A (en) * | 2007-05-18 | 2008-02-06 | 李克明 | Vehicle intellectualized management system |
| CN201562973U (en) * | 2009-11-04 | 2010-08-25 | 南京因泰莱配电自动化设备有限公司 | High-voltage power reactive compensation comprehensive protection controller |
| CN202033886U (en) * | 2011-03-22 | 2011-11-09 | 江苏天泽环保科技有限公司 | Data acquisition and transmission instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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: 20130821 |
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