CN1034426A - Automobile-carried monitoring and recording instrument - Google Patents
Automobile-carried monitoring and recording instrument Download PDFInfo
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- CN1034426A CN1034426A CN 88107140 CN88107140A CN1034426A CN 1034426 A CN1034426 A CN 1034426A CN 88107140 CN88107140 CN 88107140 CN 88107140 A CN88107140 A CN 88107140A CN 1034426 A CN1034426 A CN 1034426A
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Abstract
The vehicle speed signal that provides by vehicle speed sensor, brake failure signal that canting signal, the braking safety device excessively that the rollover sensor provides provides and the brake signal that provides by brake switch, input to processing of signal memory and storage, and can show and printout by signal picker, thereby can write down and show the speed of a motor vehicle, cross parameters such as canting, braking, parking interval, stroke, provide science data for analyzing traffic hazard and modern highway transportation management.The present invention also is provided with multiple alarm, and adopts high anti-interference stabilized voltage supply.And software fault-tolerant technology, to guarantee the reliable of record data.
Description
Automobile-carried monitoring and recording instrument is used for the monitoring and the record of motor vehicle accidents such as automobile, truck, motorcycle and ruuning situation.
Utility model 87202309 computer recording instrument for vehicle speed are a kind of simple computer recorders that only write down the speed of a motor vehicle, and the motor vehicle microcomputer velocity-measuring system of Beijing Aeronaution College's development recently also belongs to this type, and its programme of work as shown in Figure 1.1 is vehicle speed sensor among the figure, and 2 is shaping circuit, and 3 is counter, and 4 is parallel interface, and 5 is the signal memory, and 6 is signal picker, and 7 is printer, and 8 is display, and 9 is overspeed alarm; 10 is automobile power source, and 11 is voltage stabilizer, and wherein 1,2,3,4,5,9,10,11 is vehicle-mounted part, and 6,7,8 is data processing section.The vehicle speed sensor that constitutes by the photoelectric velocity measurement dish, convert the distance mechanical quantity to a series of pulsed quantities, after the shaping circuit shaping, by rolling counters forward, input to the signal memory by parallel interface, the signal memory is by single-chip microcomputer, address latch, ROM and RAM connect the microsystem that normal structure is formed, its power supply is supplied with after voltage stabilizing by vehicle-mounted automobile power source, when the speed of a motor vehicle surpasses fixing speed, the signal memory is connected overspeed alarm and is reported to the police, the signal that the signal memory is stored can be defeated by signal picker, to show and print form output that signal picker is by single-chip microcomputer, keyboard, the microsystem that printing interface and display interface are formed.
This scheme only can write down the variation of the speed of a motor vehicle and the vehicle speed data of first three minute of stopping in order, to the judgement accident is not enough fully, owing to brake failure or driver sail irrigation canals and ditches accidentally into slide-out is not all noted such as motor vehicles, and it more can not write down the long speed of a motor vehicle and change, down time and ruuning situation, driving distance etc., can not be as the foundation of vehicle management department statistics, examination and supervision, alarm also only limiting to the speed of a motor vehicle, does not all have for brake failure, may reporting to the police of tumbling.Its another critical weakness is a poor anti jamming capability, and the spark interference of motor vehicle etc. usually causes the misdescription record or writes down malfunctioning.
The objective of the invention is to design a kind of registering instrument that can write down a plurality of operational factors that comprise the speed of a motor vehicle, canting, braking, parking interval, stroke, provide the data of science for analyzing traffic hazard and modern highway transportation management, and multiple alarm is set, drive with caution to improve the driver.The present invention adopts a series of interference protection measures, to guarantee reliably and not losing of record data.
The vehicle speed sensor that constitutes by the photoelectric velocity measurement dish, convert the stroke mechanical quantity to electric pulse, after the shaping circuit shaping, by rolling counters forward, input to the signal memory by parallel interface, the data that the signal memory is stored can input to signal picker, to show and print form output, system is directly powered by vehicle power, feature of the present invention is the canting signal excessively of rollover sensor, the brake failure signal of braking safety device and the brake signal by brake switch are also after the shaping circuit shaping, input to the storage of signal memory, and can show and printout by signal picker.
The rollover sensor is to be equipped with a free rolling small ball in a V-shaped groove, thereby small ball is rolled into the output of certain some connection signal to the vehicle tilted orientation when the vehicle canting reaches certain angle.
The braking safety device is provided by patent 85201122, during car brakeing, at first open vehicle-mounted brake switch, brake before and after the gases at high pressure of total air pump enter through the braking safety device again, gases at high pressure promote paddle rotation wherein in the braking safety device, drive the driven gear that is engaged with the rotation of the coaxial gear of paddle, travel forward thereby make with the coaxial screw rod of driven gear, when braking is effective, the gases at high pressure air-flow no longer releases after checking vehicle, and screw motion is not enough to connect circuit, when brake failure, the gases at high pressure air-flow continues to release, and circuit provides the brake failure signal thereby screw rod moves on connection.
Advantage of the present invention is the variation that registering instrument can not only write down the speed of a motor vehicle, and can write down braking, brake failure, crosses signals such as canting, thereby the data of science are provided for crash analysis and vehicle management.The present invention is by the processing of software, but the data of continuous recording more than 36 hours also adopt high anti-interference stabilized voltage supply.And fault-tolerant technique, improved reliability, prove also unlikely obliterated data and misdescription record on old-fashioned "Liberation" truck through long-time running.
Fig. 2 is a system diagram of the present invention, and wherein 1 is vehicle speed sensor, and 2 is shaping circuit, 3 is counter, and 4 is parallel interface, and 5 is the signal memory, 6 is signal picker, and 7 is printer, and 8 is display, 10 is vehicle power, and 14 is high anti-interference stabilized voltage supply, and 12 are the rollover sensor, 13 is the braking safety device, 15 is brake switch, and 16 for exceeding the speed limit, cross canting, brake failure alarm, and 17 for exceeding the speed limit, cross canting, brake failure alarm lamp.
A writing time at interval during parking, shown in its program circuit was both in riotous profusion, behind the system initialization, at first judge whether to stop, if stop then writing time, then judge whether to drive, driving then stops writing time, and writing speed, the judgement first time and the negative then downward executive routine of judgement second time quilt, continue the shortcoming of the storage parking speed of a motor vehicle (note " 0 ") when this program mode (PM) has overcome parking, saved effective memory space.
The high anti-interference source of stable pressure that Fig. 4 adopts for system.10 is vehicle power among the figure, 18 for preventing that power supply connects anti-isolating diode, 19 is current-limiting resistance, 20 is Zener diode, 21 is relay, 22 is triode, 23 is emitter resistance, 24,25 is relay contact, 26 is 16 volts of Zener diodes, 27 is filter capacitor, 28 is inductance, 29 is electric capacity, 28,29 form anti-high frequency interference low-pass filter, 30 is integrated regulator, 31 is electric capacity, 32 is+5 volts of Zener diodes, 33 is diode, 34 is resistance, 35 is diode, 36 is standby power supply, vehicle-mounted 12 volts of power supplys 10 are given by 19 by commutation diode 18 backs, 20,21,22, the 23 relay circuit power supplies of forming, cross when low when supply voltage, the collector current of triode 22 is inhaled galvanization less than relay, and contact 25 resets the RESET(of single-chip microcomputer) ground connection resets, when supply voltage reaches the regulation requirement, relay is inhaled logical, and RESET connects to contact 24(noble potential), system works, Bing Lian voltage stabilizing diode 26 is stabilized in supply voltage below 16 volts with it, electric capacity 27 is in order to filtering, and then through 2 inductance 28, its end also connects electric capacity 29, with the retardance high-frequency harmonic, after passing through integrated regulator 30 voltage stabilizings again, and connect electric capacity 31 and 5 volts of zener diodes 32 in order to absorb surge voltage, diode 33 outputs that connect by forward again, the parallel network that standby power supply 36 is formed by resistance 34 and diode 35 is attempted by output terminal, when power down, standby power supply is by diode 35 output power supplies, and the voltage after the voltage stabilizing is by diode 33 at ordinary times, resistance 34 charges to standby power supply.
Fig. 5, Fig. 6, Fig. 7 are the program flow diagram of System Fault Tolerance software, as shown in Figure 5, after instantaneous velocity obtains, enter the determining program that whether exceeds variation range, give fixed variation range if exceed, then change level and smooth program over to, instantaneous value changes gets smooth value, changes down program then over to, if do not exceed, then directly change down program over to, this is that speed is fault-tolerant, thereby can correct the speed mistake that causes because of interference.As shown in Figure 6, braking, crossing the canting signaling interface, at first judging has not signal, if there is signal, enter determining program, whether judge its duration greater than the stipulated time, if greater than, then with the braking of last time or canting signal operation downwards after the joint account time excessively, if no signal, perhaps the duration is not then remembered signal less than official hour (duration of undesired signal is very short), directly operation downwards.This is braking with to cross canting fault-tolerant, disturbs the braking that causes and crosses the canting signal error thereby can correct.As shown in Figure 7, whether the determining program position in the program area, as in the program area, then the identifier with each program segment of program area judges whether in the regulated procedure section, if, then continue normal operation, if not in the program area, or, then go to beginning and carry out again not regulated procedure section (promptly run and fly).This is a program tolerance, disturbs the program that causes to make mistakes in order to correct.
Hypervelocity, brake failure, canting surpassed for ± 15 degree/times, signal by three kinds of different make-and-break time ratios of signal memory output is given alarm equipment alarm, during alarm, signal also can ignite the signal lamp of three kinds of different colours, arouses attention with the prompting driver.
Claims (7)
1, automobile-carried monitoring and recording instrument, the vehicle speed sensor that constitutes by the photoelectric velocity measurement dish, convert the stroke mechanical quantity to electric pulse, after the shaping circuit shaping, by rolling counters forward, input to the signal memory by parallel interface, the data that the signal memory is stored can input to signal picker, to show and print form output, system is directly powered by vehicle power, feature of the present invention is the canting signal excessively of rollover sensor, the brake failure signal of braking safety device and the brake signal by brake switch also after the shaping circuit shaping, are transported to the storage of signal memory, and can be shown and printout by signal picker.
2, according to the automobile-carried monitoring and recording instrument of claim 1, it is characterized in that a writing time at interval when stopping, program circuit is, behind the system initialization, at first judge whether to stop, if stop then writing time, then judge whether to drive, drive then to stop writing time, and writing speed, judging for the first time and judging is for the second time negated then to carry out downwards.
3, according to the automobile-carried monitoring and recording instrument of claim 1 or 2, it is characterized in that power supply supplied with through the anti-interference source of stable pressure of height by vehicle power, as shown in Figure 4, vehicle power is by giving behind the commutation diode by relay coil, triode collection emitter-base bandgap grading, the power supply of dropping resistor series circuit, the base stage of triode with connect the commutation diode negative pole after sparkproof diode and resistance are connected in series, the RESET(of single-chip microcomputer resets) hold by contact 25 ground connection, when supply voltage reaches the regulation requirement, relay is inhaled logical, RESET connects to contact 24, and contact 24 communicates with the triode emitter-base bandgap grading.The triode circuit also connects voltage stabilizing diode and electric capacity, then through two series inductances, its end also connects electric capacity, after passing through integrated regulator again, and connect electric capacity and Zener diode, the diode output that connects by forward again, the parallel network that standby power supply is formed by resistance and diode is attempted by output terminal.
4, automobile-carried monitoring and recording instrument according to claim 3, it is characterized in that system adopts fault-tolerant software, speed fault-tolerant flow process is, obtain is after speed per hour becomes, enter the determining program that whether exceeds variation range, give fixed variation range if exceed, then change level and smooth program over to, be that the speed per hour variate changes and gets smooth value, change down program then over to, if do not exceed, then directly change down program over to, braking with mistake canting fault-tolerant flow process is, in braking, cross the canting signaling interface, at first judging has not signal, if there is signal, then enters determining program, judge that whether its duration is greater than the stipulated time, if greater than, then with the braking of last time or canting signal operation downwards after the joint account time excessively, if no signal, perhaps the duration is less than official hour, then do not remember signal, directly operation downwards, the program tolerance flow process is, at first whether the determining program position is in the program area, as in the program area, then the identifier with each program segment of program area judges whether in the regulated procedure section, if, then continue normal operation, if not in the program area, or, then go to beginning and carry out again not in the regulated procedure section.
5, according to the automobile-carried monitoring and recording instrument of claim 1 or 2, it is characterized in that the signal memory is when hypervelocity, brake failure, canting are spent above ± 15, the signal of three kinds of different make-and-break time ratios of output is given alarm equipment alarm, outputs signal to the signal lamp of three kinds of different colours simultaneously.
6, according to the automobile-carried monitoring and recording instrument of claim 3, it is characterized in that the signal memory is when hypervelocity, brake failure, canting are spent above ± 15, the signal of three kinds of different make-and-break time ratios of output is given alarm equipment alarm, outputs signal to the signal lamp of three kinds of different colours simultaneously.
7, according to the automobile-carried monitoring and recording instrument of claim 4, it is characterized in that the signal memory is when hypervelocity, brake failure, canting are spent above ± 15, the signal of three kinds of different make-and-break time ratios of output is given alarm equipment alarm, outputs signal to the signal lamp of three kinds of different colours simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88107140 CN1034426A (en) | 1988-10-26 | 1988-10-26 | Automobile-carried monitoring and recording instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88107140 CN1034426A (en) | 1988-10-26 | 1988-10-26 | Automobile-carried monitoring and recording instrument |
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| Publication Number | Publication Date |
|---|---|
| CN1034426A true CN1034426A (en) | 1989-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88107140 Pending CN1034426A (en) | 1988-10-26 | 1988-10-26 | Automobile-carried monitoring and recording instrument |
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| CN (1) | CN1034426A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135691B (en) * | 2007-08-01 | 2011-12-07 | 宁波工程学院 | Vehicle mounted method and apparatus for testing operating parameter or pollutant discharged of motor vehicle |
-
1988
- 1988-10-26 CN CN 88107140 patent/CN1034426A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135691B (en) * | 2007-08-01 | 2011-12-07 | 宁波工程学院 | Vehicle mounted method and apparatus for testing operating parameter or pollutant discharged of motor vehicle |
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