CN101373168B - Dynamic calibration method of portable brake tester - Google Patents
Dynamic calibration method of portable brake tester Download PDFInfo
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- CN101373168B CN101373168B CN2008102184502A CN200810218450A CN101373168B CN 101373168 B CN101373168 B CN 101373168B CN 2008102184502 A CN2008102184502 A CN 2008102184502A CN 200810218450 A CN200810218450 A CN 200810218450A CN 101373168 B CN101373168 B CN 101373168B
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- control treatment
- time curve
- brake tester
- turning axle
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Abstract
The invention discloses a dynamic calibration method for a portable braking tester and comprises the following steps: a. an acceleration sensor of the braking tester to be calibrated is mounted on a fixed mechanism of the acceleration sensor; b. a control processing module controls a driving mechanism, and a rotating shaft is driven by the driving mechanism to rotate; c. an angle sensor transmitsangle signals of the rotating shaft tested at different times to the control processing module, and the braking tester transmits acceleration signals tested at different times to the control processing module; d. the control processing module calculates an actual deceleration-time curve according to the input angle signals and an actual measurement deceleration-time curve of the braking tester according to the input acceleration signals, and by comparing the two curves, calculates the MFDD indication error. The method has the advantages of exact and reliable calibration result, high calibration efficiency, high operability and repeatability, can guarantee the personal and property safety, and greatly reduces the cost of dynamic calibration.
Description
Technical field
The present invention relates to a kind of dynamic calibration method of portable brake tester.
Background technology
The dynamic calibration of portable brake performance tester, can carry out according to 7.2 of JJF 1168-2007 " portable brake performance tester calibrating standard " in theory at present, that is: select the test vehicle of a stable performance, by the requirement of related description book car speed is taken into account by the school portable brake performance tester and to be installed on the test vehicle together, and connect foot pedal.
Test site and method are pressed GB7258-2004 " motor vehicle security of operation technical conditions " respective specified.
When car speed is about 30km/h, 50km/h, carry out brake test, the average retardation rate that fully sends (be MFDD, below the identical) error of indication of each point, each time measurement is calculated in each duplicate measurements 3 times.
But there are the following problems for this calibration steps:
1, the test findings influence of factors such as vehicle performance, test site situation, vehicle driver's skill level and driving habits, weather that is put to the test is difficult to guarantee good test repeatability;
2, introduced metrograph in the test, be used for the speed and the operating range of experiment with measuring vehicle, the actual performance of metrograph directly influences test findings, and this dynamic calibration method belongs to relative method.
Therefore, domestic Measuring and testing mechanism only does static calibration to portable brake performance tester present stage, is difficult to carry out dynamic calibration.
Summary of the invention
The object of the present invention is to provide a kind of calibration steps of portable brake tester, this method can be carried out dynamic calibration to portable brake tester, calibration result accurately and reliably, the calibration efficiency height, operability and good reproducibility, can ensure the person and property safety, reduce the cost of dynamic calibration significantly.
The present invention is achieved through the following technical solutions:
A kind of dynamic calibration method of portable brake tester, this method comprises the steps: at least
A, the acceleration transducer of brake tester to be calibrated is installed on the acceleration transducer fixed mechanism;
B, control treatment module controlling and driving mechanism are rotated by the drive mechanism turning axle;
C, angular transducer transfer to control treatment module with the angle signal of turning axle that different time is surveyed, and brake tester transfers to control treatment module with different time institute measuring acceleration signal;
D, control treatment module are according to the angle signal of being imported, calculate actual deceleration degree-time curve, control treatment module is according to the acceleration signal of being imported, calculate brake tester actual measurement retarded velocity-time curve, and with actual deceleration degree-time curve with the actual measurement retarded velocity-time curve compare, by calculating the MFDD error of indication of brake tester.
Wherein, in described a step, described acceleration transducer is installed on the described acceleration transducer fixed mechanism, and described acceleration transducer is positioned at directly over the axis of described turning axle, in described b step, under the control of described control treatment module, described turning axle adopts relatively low rotating speed rotation.
The used dynamic calibration apparatus of the present invention is, this calibrating installation comprises control treatment module and frame, the turning axle of the movable level that is provided with reaches and this is rotated shaft-driven driving mechanism on frame, on turning axle, be provided with the acceleration transducer fixed mechanism, also be provided with the angular transducer that is synchronized with the movement with turning axle, driving mechanism, angular transducer all are electrically connected with control treatment module, are provided with the connectivity port that can be electrically connected with brake tester to be calibrated on control treatment module.
Described control treatment module comprises PC and the single-chip microcomputer that is electrically connected mutually; PC is a PC, as desktop computer or laptop computer.
Described driving mechanism comprises stepper motor and the motor driver that is electrically connected with stepper motor, and this motor driver and described control treatment module are electrically connected.
Between described stepper motor and described turning axle, be provided with shaft coupling, between described angular transducer and described turning axle, also be provided with shaft coupling.
Between described stepper motor and described shaft coupling, be provided with speed reduction unit.
Described acceleration transducer fixed mechanism comprises overturn platform and is located at fixture on this overturn platform.
Between described overturn platform and described turning axle, be provided with governor motion.
It should be noted that described brake tester is a portable brake tester to be calibrated, described acceleration transducer is the acceleration transducer of this portable brake tester.
Description of drawings
Fig. 1 is the front elevation of the dynamic calibration apparatus of portable brake tester;
Fig. 2 is the stereographic map of Fig. 1;
Fig. 3 is the structured flowchart of the present invention when calibrating;
Description of reference numerals:
1, stepper motor, 2, speed reduction unit, 3, shaft coupling, 4, frame, 5, turning axle, 6, overturn platform, 7, governor motion, 8, shaft coupling, 9, angular transducer, 10, motor driver, 11, PC, 12, single-chip microcomputer, 13, brake tester, 14, the connectivity port, 15, acceleration transducer.
Embodiment
As shown in Figure 1 to Figure 3, a kind of dynamic calibration method of portable brake tester, this method comprises the steps:
A, the acceleration transducer 15 of brake tester to be calibrated 13 is installed on the overturn platform 6;
Single-chip microcomputer 12 in b, the control treatment module is by motor driver 10 controlling and driving mechanisms, by 5 rotations of drive mechanism turning axle;
C, angular transducer 9 transfer to PC 11 with the angle signal of institute's turning axle that different time is surveyed 5, and brake tester 13 transfers to PC 11 with different time institute measuring acceleration signal;
D, PC 11 are according to the angle signal of being imported, calculate actual deceleration degree-time curve, PC 11 is according to the acceleration signal of being imported, calculate brake tester actual measurement retarded velocity-time curve, and with actual deceleration degree-time curve with the actual measurement retarded velocity-time curve compare, by calculating the MFDD error of indication of brake tester 13.
Wherein, in aforementioned a step, described acceleration transducer 15 is installed on the overturn platform 6, and described acceleration transducer 15 is positioned at directly over the axis of turning axle 5, in aforementioned b step, under the control of single-chip microcomputer 12, turning axle 5 adopts relatively low rotating speed rotation.
The used dynamic calibration apparatus of this method is, this calibrating installation comprises control treatment module and frame 4, on frame 4 turning axle 5 of the movable level that is provided with and and driving mechanism that this turning axle 5 is driven, on turning axle 5, be provided with the acceleration transducer fixed mechanism, also be provided with the angular transducer 9 that is synchronized with the movement with turning axle 5, driving mechanism, angular transducer 9 all are electrically connected with control treatment module, are provided with the connectivity port 14 that can be electrically connected with brake tester 13 to be calibrated on control treatment module.
Described control treatment module comprises PC 11 (being commonly called as host computer) and the single-chip microcomputer 12 (being commonly called as slave computer) that is electrically connected mutually, described driving mechanism comprises stepper motor 1 and the motor driver 10 that is electrically connected with stepper motor 1, and this motor driver 10 is electrically connected with single-chip microcomputer 12; Between stepper motor 1 and turning axle 5, be provided with speed reduction unit 2 and shaft coupling 3, between angular transducer 9 and turning axle 5, also be provided with shaft coupling 8; Described acceleration transducer fixed mechanism comprises overturn platform 6 and is located at fixture (not shown) on this overturn platform 6, be provided with governor motion 7 between overturn platform 6 and turning axle 5.
Dynamic calibration method of the present invention:
Particularly, the technical solution adopted in the present invention is: the variation of acceleration is by acceleration transducer 15 low speed rotation realization continuously in perpendicular of portable brake performance tester 13, according to retarded velocity in the car brakeing process and time relation, several desirable braking deceleration-time curves have been designed according to different initial velocity, PC 11 is converted into the control data coding, by single-chip microcomputer 12 control motor drivers 10, drive stepping motor 1 and speed reduction unit 2 drive overturn platform 6 low speed rotation (the initial and done state of overturn platform 6 is a horizontality) in perpendicular; PC 11 interconnects with angular transducer 9, the angle signal value of sampling angle sensor 9, and the corner-time data of record overturn platform 6 is converted to retarded velocity-time curve subsequently; When the acceleration transducer 15 of brake tester 13 is followed overturn platform 6 rotations, brake tester 13 is noted the retarded velocity-time curve of measurement, be transferred to PC 11, retarded velocity-time curve obtains speed-time curve by integration, integration can get distance-time curve once more, and then can calculate the initial speed of braking of GB7258-2004 " motor vehicle security of operation technical conditions " (or its latest edition) and GA/T 485-2004 " portable brake performance tester " (or its latest edition) regulation, braking distance, the brake coordination time, braking ability evaluating values such as MFDD, by relatively drawing the various errors of indication of brake tester 13, finish the calibration of brake performance tester 13.
The present invention has following advantage:
1, need not special test road surface, test vehicle, driver and metrograph, whole dynamic calibration process is finished in the laboratory, and has realized automation, the efficient height, and operability and good reproducibility can ensure the person and property safety;
2, owing to adopt absolute calibration, calibration result accurately and reliably;
3, can test with higher vehicle initial velocity (speed of a motor vehicle is greater than 50km/h);
4, decrease the cost of dynamic calibration.
Claims (1)
1. the dynamic calibration method of a portable brake tester is characterized in that, this method comprises the steps: at least
A, the acceleration transducer of brake tester to be calibrated is installed on the acceleration transducer fixed mechanism, and acceleration transducer is positioned at directly over the axis of turning axle;
B, control treatment module controlling and driving mechanism are rotated by the drive mechanism turning axle;
C, angular transducer transfer to control treatment module with the angle signal of turning axle that different time is surveyed, and brake tester transfers to control treatment module with different time institute measuring acceleration signal;
D, control treatment module are according to the angle signal of being imported, calculate actual deceleration degree-time curve, control treatment module is according to the acceleration signal of being imported, calculate brake tester actual measurement retarded velocity-time curve, and with actual deceleration degree-time curve with the actual measurement retarded velocity-time curve compare, by calculating the average retardation rate error of indication of fully sending;
Wherein,, designed several desirable braking deceleration-time curves, be converted into the control data coding by control treatment module according to different initial velocity according to retarded velocity in the car brakeing process and time relation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102184502A CN101373168B (en) | 2008-10-17 | 2008-10-17 | Dynamic calibration method of portable brake tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102184502A CN101373168B (en) | 2008-10-17 | 2008-10-17 | Dynamic calibration method of portable brake tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101373168A CN101373168A (en) | 2009-02-25 |
| CN101373168B true CN101373168B (en) | 2010-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102184502A Expired - Fee Related CN101373168B (en) | 2008-10-17 | 2008-10-17 | Dynamic calibration method of portable brake tester |
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| Country | Link |
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| CN (1) | CN101373168B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419191A (en) * | 2011-09-09 | 2012-04-18 | 陆科 | Tool for calibrating and programming sensor |
| CN103344787A (en) * | 2013-07-03 | 2013-10-09 | 中国海洋石油总公司 | Device for calibrating ultra-low frequency response characteristics of acceleration sensor |
| CN105716880B (en) * | 2016-05-04 | 2018-02-23 | 广州计量检测技术研究院 | Drum reaction brake test bench dynamic calibration apparatus and its calibration method |
| CN107024357B (en) * | 2017-05-04 | 2019-03-29 | 河南省计量科学研究院 | A kind of portable brake performance tester calibrating installation and its calibration method |
| CN108519501B (en) * | 2018-07-05 | 2023-09-05 | 河南省计量测试科学研究院 | Sliding time detector, calibrating device for non-contact speedometer and calibrating method |
| CN110567731B (en) * | 2019-08-15 | 2021-06-04 | 吉林大学 | Double-rotation brake performance tester inspection bench |
| CN111735616B (en) * | 2019-12-24 | 2021-09-21 | 吉林大学 | Mechanical automatic dynamic balance brake performance tester inspection bench |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2432102Y (en) * | 2000-06-13 | 2001-05-30 | 公安部交通管理科学研究所 | Portable braking proterty tester |
| CN101173878A (en) * | 2007-11-27 | 2008-05-07 | 上海西派埃自动化仪表工程有限责任公司 | Static and dynamic acceleration testing device |
| CN201066322Y (en) * | 2007-06-08 | 2008-05-28 | 江苏大学 | A braking stability detection device based on the car joint braking system |
| CN101285738A (en) * | 2007-12-17 | 2008-10-15 | 周速帆 | Automobile braking road test instrument inspection instrument |
-
2008
- 2008-10-17 CN CN2008102184502A patent/CN101373168B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2432102Y (en) * | 2000-06-13 | 2001-05-30 | 公安部交通管理科学研究所 | Portable braking proterty tester |
| CN201066322Y (en) * | 2007-06-08 | 2008-05-28 | 江苏大学 | A braking stability detection device based on the car joint braking system |
| CN101173878A (en) * | 2007-11-27 | 2008-05-07 | 上海西派埃自动化仪表工程有限责任公司 | Static and dynamic acceleration testing device |
| CN101285738A (en) * | 2007-12-17 | 2008-10-15 | 周速帆 | Automobile braking road test instrument inspection instrument |
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| CN101373168A (en) | 2009-02-25 |
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