CN200941082Y - Portable braking performance detector - Google Patents
Portable braking performance detector Download PDFInfo
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- CN200941082Y CN200941082Y CN 200620088011 CN200620088011U CN200941082Y CN 200941082 Y CN200941082 Y CN 200941082Y CN 200620088011 CN200620088011 CN 200620088011 CN 200620088011 U CN200620088011 U CN 200620088011U CN 200941082 Y CN200941082 Y CN 200941082Y
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Abstract
The portable brake performance testing instrument belongs to the vehicle performance testing equipment field, comprising a sensor and a processing unit, which is characterized in that the sensor adopts the triaxial accelerometer, the output terminal of which connects the input terminal of the processing unit. The adoption of the triaxial accelerometer and the processing unit connected with the accelerometer makes the testing vehicle be braked without using the treadle. The triaxial accelerometer inputs the testing data into the processing unit to be treated and outputs, stores and transmits the result, which is of simple operation, high reliability and success rate.
Description
Technical field
The utility model relates to a kind of portable brake performance tester, belongs to vehicle performance checkout equipment field.
Background technology
The measuring vehicle braking ability of current use and the brake instrument of acceleration, palpus manual record license plate number, date etc. when detecting vehicle, detection efficiency is low, and must make the foot-switch of special detection brake usefulness, be installed on during detection on the foot-switch of automobile, when touching on the brake, the action simultaneously owing to the interlock effect, send brake signal to instrument, instrument just enters trace routine and detects.Thereby must connect instrument and foot-switch when detecting at every turn, and in operation, also can occur detecting inaccurate and detect the phenomenon of failure because of testing staff's installation and operational issue.
The utility model content
According to above deficiency of the prior art, the technical problems to be solved in the utility model is: provide a kind of simple to operate, and detecting reliability height, success ratio height, and need not the portable brake performance tester of pedal.
The technical scheme that its technical matters that solves the utility model adopts is: this portable brake performance tester, comprise sensor and processing unit, it is characterized in that: sensor adopts 3-axis acceleration sensor, the input end of the output terminal connection processing unit of 3-axis acceleration sensor.
Described processing unit comprises MCU processor circuit, keyboard circuit, power circuit, communication interface and output unit, the output terminal of MCU processor circuit connects output unit, communication interface connects the communication terminal of MCU processor circuit, keyboard connects the input end of MCU processor circuit, and power circuit connects MCU processor circuit, keyboard circuit, power circuit, communication interface and output unit.
Described output unit comprises display screen and printer.
Power circuit comprises regulator rectifier circuit, indicating circuit and voltage detecting circuit.
Regulator rectifier circuit comprises voltage stabilizer U6, U7, interface J4, J5, capacitor C 6-C12, resistance R 9-R18, operational amplifier U8, diode D1, triode Q3 and rectifier bridge B1.1 pin of interface J4 is connected 3 pin of rectifier bridge B1 with 2 pin, 3 pin are connected 1 pin of rectifier bridge B1 with 4 pin.1 pin and 3 pin of the 2 pin connecting interface J5 of rectifier bridge B1,4 pin ground connection.The 2 pin ground connection of interface J5,4 pin connect 1 pin of voltage stabilizer U6, U7, are connected with capacitor C 9 between 4 pin and the ground.The 2 pin ground connection of voltage stabilizer U6 are connected with between 1 pin and the ground between capacitor C 6,3 pin and the ground and are parallel with capacitor C 7, C8.The 2 pin ground connection of voltage stabilizer U7 are connected with between 1 pin and the ground between capacitor C 10,3 pin and the ground and are parallel with capacitor C 11, C12.
1 pin that indicating circuit comprises interface J4 and 2 pin also are connected 6 pin of pilot lamp LED1, and 3 pin and 4 pin also are connected 5 pin of pilot lamp LED1 with resistance R 9 by diode in series D1.1 pin of pilot lamp LED1 is connected VCC by resistance R 17 with resistance R 18 respectively with 3 pin, 2 pin ground connection.
Voltage detecting circuit comprises and is in series with resistance R 11 and resistance R 12 between DCIN and the ground, the common port of resistance R 11 and resistance R 12 is by 2 pin of resistance R 10 concatenation operation amplifier U8A, be in series with resistance R 14 and resistance R 15 between VCC and the ground, the common port of resistance R 14 and resistance R 15 is by 3 pin of resistance R 13 concatenation operation amplifier U8A, and 1 pin of operational amplifier U8A connects the base stage of triode Q3 by resistance R 16.The radio utmost point ground connection of triode Q3, collector connects 4 pin of pilot lamp LED1.
Principle of work: band A/D conversion in the 3-axis acceleration sensor, can directly link to each other with the MCU processor circuit, directly degree of will speed up value input MCU processor circuit has improved the reaction capacity of MCU processor circuit for calculating usefulness, can in time make judgement to the vehicle travel condition.
When detecting vehicle, portable brake performance tester is placed on position more smooth in the tested vehicle, the travel direction arrow direction on the instrument panel is the travel direction of vehicle, and portable brake performance tester is set level substantially.Start enters selects the interface, choose after the parameter that tested vehicle is capable to give it the gun and have certain speed, this brief acceleration 〉=0, after vehicle begins brake, the accekeration that this moment, 3-axis acceleration sensor transmitted becomes negative value, the MCU processor circuit judges that in time vehicle enters braking state, and initial velocity is stored and picked up counting and enters the brake trace routine at this moment.The MCU processor circuit constantly reads accekeration in the brake process, writes down maximum deceleration and judges whether to stop.When vehicle stops to stop timing after (this brief acceleration is zero), and according to the parameter of noting down, calculate the result such as initial velocity, brake time, maximum deceleration, MFDD of brake and on display screen LCD, show, also can or deposit the inner inquiry fully later on of single-chip microcomputer in, perhaps data are transmitted on the PC by the Max232 communication interface by printer prints.
Compared with prior art, the beneficial effect that the utility model portable brake performance tester is had is: by adopting 3-axis acceleration sensor and being attached thereto the processing unit that connects, make that need not pedal when detecting vehicle participates in braking, 3-axis acceleration sensor will detect the data input processing unit and handle, and the result can be exported, stores and transmits, simple to operate, reliability and success ratio height.
Description of drawings
Fig. 1 is a functional-block diagram of the present utility model;
Fig. 2 is a MCU processor circuit schematic diagram of the present utility model;
Fig. 3 is power circuit principle figure of the present utility model;
Fig. 4 is communication interface circuit theory diagrams of the present utility model.
Fig. 1-the 4th, the most preferred embodiment of the utility model portable brake performance tester, in Fig. 1-4: U1 single-chip microcomputer U2 bus is amplified chip U3 latch U4 storer U5 keyboard managing chip U6, U7 voltage stabilizer U8 operational amplifier U9 RS232 communication chip C1-C16 electric capacity R1-R18 resistance J1-J6 interface JP1, JP2 interface chip Q1-Q3 triode B1 rectifier bridge Y1 crystal oscillator PR1 exclusion D1, D2 diode (LED) 1 pilot lamp.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, the output terminal of sensor connects MCU processor input end, and the output terminal of MCU processor connects display screen and printer, and communication interface connects the communication terminal of MCU processor, and keyboard connects the input end of MCU processor, and power supply connects the MCU processor.
Sensor adopts 3-axis acceleration sensor.
As shown in Figure 2, the MCU processor circuit comprises that single-chip microcomputer U1, bus amplification chip U2, latch U3, storer U4, capacitor C 1-C3, resistance R 1-R3, interface J1, J2, triode Q1, Q2 and exclusion PR1 form.The P1 mouth of single-chip microcomputer U1 meets VCC by exclusion PR1, and connecting interface J1, and capacitor C 1, C2 and crystal oscillator Y1 form X1 and the X2 pin that oscillatory circuit is connected single-chip microcomputer U1, and the P0 mouth connecting bus of single-chip microcomputer U1 amplifies the A mouth of chip U2.The B mouth that bus is amplified chip U2 connects the D mouth of latch U3 and the D mouth of storer U4.The P2 mouth part of the Q mouth of latch U3 and single-chip microcomputer U1, the A mouth of connected storage U4,16 pin of single-chip microcomputer U1,27 pin of 17 pin connected storage U4,22 pin.15 pin of single-chip microcomputer U1 connect the base stage of triode Q1 by capacitor C 3.Triode Q1, Q2, resistance R 1, R2 form driving circuit, 2 pin of the collector connecting interface J2 of triode Q2, and 1 pin of interface J2 connects VCC by resistance R 3.
Keyboard circuit comprises keyboard managing chip U5, capacitor C 4, C5, resistance R 4-R8 and interface J3.1 pin of interface J3 is by 16 pin of resistance R 5 connecting key disk management chip U5, and 1 pin also passes through resistance R 6 ground connection, 18 pin-22 pin of 2 pin-6 pin connecting key disk management chip U5, and 7 pin are by resistance R 7, R8 ground connection, and 7 pin also meet VCC by resistance R 7, capacitor C 5.27 pin of keyboard managing chip U5 meet VCC by resistance R 4, and also by capacitor C 4 ground connection, 28 pin, 1 pin, 2 pin meet VCC to 27 pin, 4 pin and 6 pin ground connection, 7 pin connect 28 pin of single-chip microcomputer U1, and 8 pin connect 27 pin of single-chip microcomputer U1, and 9 pin connect 12 pin of single-chip microcomputer U1.
Output unit comprises interface chip JP1, JP2, resistance R 9, R10.Interface chip JP1 is according to common printer interface connection wiring, and connecting bus amplifies the B mouth of chip U2.6 pin-16 pin the connecting bus of interface chip JP2 amplifies the B mouth of chip U2, and 1 pin is by resistance R 9 ground connection, and 2 pin, 4 pin and 17 pin meet VCC, and 3 pin and 17 pin ground connection are connected with resistance R 10 between 19 pin and 20 pin.
Interface J1 connects 3-axis acceleration sensor, and 1 pin and 2 pin provide power supply, and 3 pin-6 pin is a data line interface.J2 connects loudspeaker or hummer, reports to the police or auditory tone cues.Interface J3 connects button.
As shown in Figure 3, power circuit comprises regulator rectifier circuit, indicating circuit and voltage detecting circuit.
Regulator rectifier circuit comprises voltage stabilizer U6, U7, interface J4, J5, capacitor C 6-C12, resistance R 9-R18, diode D1, operational amplifier U8, triode Q3 and rectifier bridge B1.1 pin of interface J4 is connected 3 pin of rectifier bridge B1 with 2 pin, 3 pin are connected 1 pin of rectifier bridge B1 with 4 pin.1 pin and 3 pin of the 2 pin connecting interface J5 of rectifier bridge B1,4 pin ground connection.The 2 pin ground connection of interface J5,4 pin connect 1 pin of voltage stabilizer U6, U7, are connected with capacitor C 9 between 4 pin and the ground.The 2 pin ground connection of voltage stabilizer U6 are connected with between 1 pin and the ground between capacitor C 6,3 pin and the ground and are parallel with capacitor C 7, C8.The 2 pin ground connection of voltage stabilizer U7 are connected with between 1 pin and the ground between capacitor C 10,3 pin and the ground and are parallel with capacitor C 11, C12.
1 pin that indicating circuit comprises interface J4 and 2 pin also are connected 6 pin of pilot lamp LED1, and 3 pin and 4 pin also are connected 5 pin of pilot lamp LED1 with resistance R 9 by diode in series D1.1 pin of pilot lamp LED1 is connected VCC by resistance R 17 with resistance R 18 respectively with 3 pin, 2 pin ground connection.
Voltage detecting circuit comprises and is in series with resistance R 11 and resistance R 12 between DCIN and the ground, the common port of resistance R 11 and resistance R 12 is by 2 pin of resistance R 10 concatenation operation amplifier U8A, be in series with resistance R 14 and resistance R 15 between VCC and the ground, the common port of resistance R 14 and resistance R 15 is by 3 pin of resistance R 13 concatenation operation amplifier U8A, and 1 pin of operational amplifier U8A connects the base stage of triode Q3 by resistance R 16.The radio utmost point ground connection of triode Q3, collector connects 4 pin of pilot lamp LED1.
Interface J4 connects the AC power of 9V.Interface J5 connects power switch.Pilot lamp LED1 indicates whether in charging or cell voltage deficiency.Interface J5 connects power switch, the control power supply.
As shown in Figure 4, the communication interface circuit connects capacitor C 13-C16, RS232 communication chip U8, diode D2 and interface J6 according to normal RS232 serial communication standard.1 pin of 14 pin of RS232 communication chip U8 by diode D2 connecting interface J6,2 pin of 13 pin connecting interface J6,11 pin and 12 pin are connected 11 pin and 10 pin of single-chip microcomputer U1 respectively.The 3 pin ground connection of interface J6.
Band A/D conversion in the 3-axis acceleration sensor, can directly link to each other with single-chip microcomputer U1, by interface J1 directly degree of will speed up value input single-chip microcomputer U1 use for calculating, thereby make the single-chip microcomputer U1 can current acceleration and the speed of very fast calculating, improved the reaction capacity of single-chip microcomputer U1, can in time make judgement the vehicle travel condition.
Single-chip microcomputer U1 carries E
2The high-speed microprocessor of Prom, result calculated can be preserved at any time, power down is not also lost, guaranteed the reliability of measurement result, the accekeration that transmits by 3-axis acceleration sensor is calculated and is judged that vehicle is in acceleration mode, at the uniform velocity state still is braking state (a retarded velocity state) like this, after vehicle stops, the MCU processor circuit according to calculate and preserve value calculate last test result, and the result is presented on the display screen LCD, but user's selective printing, storage or data are uploaded to PC by the communication interface circuit.
By above several measures, guaranteed that after removing foot pedal every performance of brake instrument testing vehicle brake has accurately and conveniently not only been simplified operation but also improved the accuracy rate that detects.Using by a large amount of experiments and client, prove that all novel no pedal brake instrument has very high reliability, is significant improvement and raising to existing brake instrument.
But when the user detects vehicle in addition also vehicle information such as incoming inspection person number, date, license plate number so that inquiry and management.
Comprehensive for the ease for operation that improves detection and information, we fully excavate the resource of single-chip microcomputer, designed detection person's numbering input function, date input function, license plate number input function, and when print result printable detection unit, make the last information of detection more complete comprehensively.If select storage in addition, then detection person number and date and license plate number are stored in the lump with detected parameters, in order to checking.Thereby improved the operability that detects greatly.
3-axis acceleration sensor is sent into the P1 mouth of single-chip microcomputer U1 by interface J1 degree of will speed up value, and single-chip microcomputer U1 is converted to velocity amplitude by calculating and is presented on the LCD display, judges present speed for the testing staff.If the acceleration that transmits on the occasion of, then vehicle is to quicken to advance; If acceleration be zero vehicle at the uniform velocity advancing or static; If acceleration is a negative value then vehicle enters braking state.
When detecting vehicle, portable brake performance tester is placed on position more smooth in the tested vehicle, the travel direction arrow direction on the instrument panel is the travel direction of vehicle, and portable brake performance tester is set level substantially.Start enters selects the interface, choose after the parameter that tested vehicle is capable to give it the gun and have certain speed, this brief acceleration 〉=0, after vehicle begins brake, the accekeration that this moment, 3-axis acceleration sensor transmitted becomes negative value, the MCU processor circuit judges that in time vehicle enters braking state, and initial velocity is stored and picked up counting and enters the brake trace routine at this moment.The MCU processor circuit constantly reads accekeration in the brake process, writes down maximum deceleration and judges whether to stop.When vehicle stops to stop timing after (this brief acceleration is zero), and according to the parameter of noting down, calculate the result such as initial velocity, brake time, maximum deceleration, MFDD of brake and on display screen LCD, show, also can or deposit the inner inquiry fully later on of single-chip microcomputer in, perhaps data are transmitted on the PC by the Max232 communication interface by printer prints.The average retardation rate that fully sends for the average retardation rate that fully sends of MFDD wherein, its computing formula is as follows:
MFDD＝(Vb
2-Ve
2)/25.92(Se-Sb)
In the last formula: V0 is an initial speed at brake application, unit K m/h; Vb is the speed of 0.8V0 vehicle, unit K m/h; Ve is the speed of 0.1V0 vehicle, unit K m/h; Sb is the distance that vehicle crosses between speed V0 and Vb, the m of unit; Se is the distance that vehicle crosses between speed V0 and Ve, the m of unit;
Initial speed at brake application: the present speed that is meant tested vehicle when pin is stepped on brake pedal.
Braking distance: be meant from the tested vehicle that begins to brake to stop the distance that whole braking procedure is advanced fully.
Braking T.T.: be meant from the tested vehicle that begins to brake to stop the needed time of whole braking procedure fully.
The brake coordination time: be meant to reach 75% o'clock required time of mean deceleration (MFDD) that vehicle fully sends from beginning to brake.
After date, license plate number and detection person number input was finished, single-chip microcomputer U1 was stored in the data register temporarily, as selects deposit data, and then the signal that measurement is obtained and imported deposits in, even like this after the power down, data are not also lost.
Claims (7)
1, portable brake performance tester comprises sensor and processing unit, it is characterized in that: sensor adopts 3-axis acceleration sensor, the input end of the output terminal connection processing unit of 3-axis acceleration sensor.
2, portable brake performance tester according to claim 1, it is characterized in that: processing unit comprises MCU processor circuit, keyboard circuit, power circuit, communication interface and output unit, the output terminal of MCU processor circuit connects output unit, communication interface connects the communication terminal of MCU processor circuit, keyboard connects the input end of MCU processor circuit, and power circuit connects MCU processor circuit, keyboard circuit, power circuit, communication interface and output unit.
3, portable brake performance tester according to claim 1 is characterized in that: output unit comprises display screen and printer.
4, portable brake performance tester according to claim 2 is characterized in that: power circuit comprises regulator rectifier circuit, indicating circuit and voltage detecting circuit.
5, portable brake performance tester according to claim 4 is characterized in that: regulator rectifier circuit comprises voltage stabilizer U6, U7, interface J4, J5, capacitor C 6-C12, resistance R 9-R18, operational amplifier U8, triode Q3, diode D1 and rectifier bridge B1; 1 pin of interface J4 is connected 3 pin of rectifier bridge B1 with 2 pin, 3 pin are connected 1 pin of rectifier bridge B1 with 4 pin; 1 pin and 3 pin of the 2 pin connecting interface J5 of rectifier bridge B1,4 pin ground connection; The 2 pin ground connection of interface J5,4 pin connect 1 pin of voltage stabilizer U6, U7, are connected with capacitor C 9 between 4 pin and the ground; The 2 pin ground connection of voltage stabilizer U6 are connected with between 1 pin and the ground between capacitor C 6,3 pin and the ground and are parallel with capacitor C 7, C8; The 2 pin ground connection of voltage stabilizer U7 are connected with between 1 pin and the ground between capacitor C 10,3 pin and the ground and are parallel with capacitor C 11, C12.
6, portable brake performance tester according to claim 4, it is characterized in that: 1 pin that indicating circuit comprises interface J4 and 2 pin also are connected 6 pin of pilot lamp LED1, and 3 pin and 4 pin also are connected 5 pin of pilot lamp LED1 with resistance R 9 by diode in series D1; 1 pin of pilot lamp LED1 is connected VCC by resistance R 17 with resistance R 18 respectively with 3 pin, 2 pin ground connection.
7, portable brake performance tester according to claim 4, it is characterized in that: voltage detecting circuit comprises and is in series with resistance R 11 and resistance R 12 between DCIN and the ground, the common port of resistance R 11 and resistance R 12 is by 2 pin of resistance R 10 concatenation operation amplifier U8A, be in series with resistance R 14 and resistance R 15 between VCC and the ground, the common port of resistance R 14 and resistance R 15 is by 3 pin of resistance R 13 concatenation operation amplifier U8A, and 1 pin of operational amplifier U8A connects the base stage of triode Q3 by resistance R 16; The radio utmost point ground connection of triode Q3, collector connects 4 pin of pilot lamp LED1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620088011 CN200941082Y (en) | 2006-08-16 | 2006-08-16 | Portable braking performance detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620088011 CN200941082Y (en) | 2006-08-16 | 2006-08-16 | Portable braking performance detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200941082Y true CN200941082Y (en) | 2007-08-29 |
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ID=38747258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620088011 Expired - Fee Related CN200941082Y (en) | 2006-08-16 | 2006-08-16 | Portable braking performance detector |
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| Country | Link |
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| CN (1) | CN200941082Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217301A (en) * | 2013-04-11 | 2013-07-24 | 奇瑞汽车股份有限公司 | Device and method for detecting brake performance of automobile |
| CN103335800A (en) * | 2013-06-08 | 2013-10-02 | 哈尔滨工业大学 | Vibration fault detection method and device for wind turbine |
| CN103454093A (en) * | 2013-08-22 | 2013-12-18 | 深圳市特尔佳科技股份有限公司 | Handheld type retarder general-purpose tester |
| CN107963069A (en) * | 2017-08-16 | 2018-04-27 | 常州信息职业技术学院 | Speech control car brake system |
| CN110702428A (en) * | 2019-06-10 | 2020-01-17 | 辽宁龙马安泰网络技术有限责任公司 | Method for detecting instantaneous braking performance of automobile during running |
-
2006
- 2006-08-16 CN CN 200620088011 patent/CN200941082Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217301A (en) * | 2013-04-11 | 2013-07-24 | 奇瑞汽车股份有限公司 | Device and method for detecting brake performance of automobile |
| CN103335800A (en) * | 2013-06-08 | 2013-10-02 | 哈尔滨工业大学 | Vibration fault detection method and device for wind turbine |
| CN103454093A (en) * | 2013-08-22 | 2013-12-18 | 深圳市特尔佳科技股份有限公司 | Handheld type retarder general-purpose tester |
| CN103454093B (en) * | 2013-08-22 | 2016-02-03 | 深圳市特尔佳科技股份有限公司 | A kind of handheld type retarder general-purpose tester |
| CN107963069A (en) * | 2017-08-16 | 2018-04-27 | 常州信息职业技术学院 | Speech control car brake system |
| CN110702428A (en) * | 2019-06-10 | 2020-01-17 | 辽宁龙马安泰网络技术有限责任公司 | Method for detecting instantaneous braking performance of automobile during running |
| CN110702428B (en) * | 2019-06-10 | 2021-06-04 | 辽宁龙马安泰网络技术有限责任公司 | Method for detecting instantaneous braking performance of automobile during running |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070829 Termination date: 20090916 |