CN113567147A - EDR pulley test method and readable storage medium - Google Patents
EDR pulley test method and readable storage medium Download PDFInfo
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- CN113567147A CN113567147A CN202110811197.7A CN202110811197A CN113567147A CN 113567147 A CN113567147 A CN 113567147A CN 202110811197 A CN202110811197 A CN 202110811197A CN 113567147 A CN113567147 A CN 113567147A
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- 238000010998 test method Methods 0.000 title claims abstract description 19
- 230000001133 acceleration Effects 0.000 claims abstract description 27
- 230000008859 change Effects 0.000 claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 238000012795 verification Methods 0.000 claims abstract description 14
- 230000033001 locomotion Effects 0.000 claims abstract description 11
- 238000004364 calculation method Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 11
- 238000005070 sampling Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- 238000012546 transfer Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/0078—Shock-testing of vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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Abstract
The invention provides an EDR pulley test method, which comprises the following steps: s1, carrying the EDR on a pulley for the collision test, and carrying out function verification on the EDR; s2, setting a speed change value of the tackle within a time T according to the triggering threshold and the locking condition of the EDR, converting the speed change value into an acceleration control curve of the tackle through a calculation tool, and transmitting the acceleration control curve to tackle control equipment; s3, tensioning the battery wire of the EDR, reserving a weak and easily-broken part, and at the moment of movement of the pulley, the pulley can break the power wire of the EDR, so that the verification of the power-off storage function is realized. The invention also provides a readable storage medium. The invention has the beneficial effects that: the multi-round acceptance test of the EDR is realized, and the test cost is reduced; the trigger recording accuracy of EDR and the accuracy of data recording can be verified.
Description
Technical Field
The invention relates to a pulley test method, in particular to an EDR pulley test method and a readable storage medium.
Background
Automotive event data recording system (EDR), for monitoring, collecting and recording the functions of time series data of vehicles and occupant protection systems before, when and after an event occurs, aiming to extract data after the event occurs. EDR belongs to a new automobile controller, and currently, a special rack with ten million values in China automobile research is adopted for test verification.
The current EDR test has the following problems:
1) the bench test cost of the middle steam grinding is as high as 4 ten thousand times, the cost is high, and the test schedule cannot meet the requirement of multiple verification.
2) The existing test items only verify whether the EDR under 3 acceleration curves required by regulations can be triggered to record data, and cannot verify the triggering recording accuracy of the EDR and the accuracy of data recording.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an EDR pulley test method and a readable storage medium.
The invention provides an EDR pulley test method, which comprises the following steps:
s1, carrying the EDR on a pulley for the collision test, and carrying out function verification on the EDR;
s2, setting a speed change value of the tackle within a time T according to the triggering threshold and the locking condition of the EDR, converting the speed change value into an acceleration control curve of the tackle through a calculation tool, and transmitting the acceleration control curve to tackle control equipment;
s3, tensioning the battery wire of the EDR, reserving a weak and easily-broken part, and at the moment of movement of the pulley, the pulley can break the power wire of the EDR, so that the verification of the power-off storage function is realized.
As a further improvement of the present invention, in step S2, the change value of the speed of the carriage within the time T is set according to the boundary value and equivalence method.
As a further improvement of the present invention, in step S2, a carriage speed variation value of the carriage within 150ms is set according to a boundary value and equivalence method.
As a further improvement of the present invention, in step S2, the accuracy of EDR recorded data is verified by comparing the real-time acceleration values detected by the sled with the EDR recorded data.
As a further improvement of the present invention, in step S2, the trolley control device implements accurate control of the movement of the sliding trolley by using an acceleration sensor with a sampling frequency of 20000Hz and a PID algorithm.
As a further improvement of the present invention, in step S1, the installation level of the EDR is less than 1 °.
As a further development of the invention, in step S1, the EDR is fixed to the carriage via an adapter plate.
As a further improvement of the invention, in step S2, the EDR uses an acceleration sensor to perform periodic data acquisition for acquiring the speed change of the tackle in real time, and when the speed change reaches a collision record threshold value required by regulations, the EDR records and stores the vehicle state information before and after the collision.
The invention also provides a readable storage medium having stored thereon executable instructions for implementing the method as claimed in any one of the above when executed by a processor.
The invention has the beneficial effects that: the multi-round acceptance test of the EDR is realized, and the test cost is reduced; the trigger recording accuracy of EDR and the accuracy of data recording can be verified.
Drawings
FIG. 1 is a graph of acceleration curves for the sled test method of an EDR of the present invention.
Detailed Description
The invention is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.
As shown in fig. 1, a pulley test method of EDR includes the following processes:
1) and (4) carrying out EDR function verification on a pulley of a collision laboratory of an EDR carrying company so as to meet the requirement of multiple system tests of the EDR.
2) And setting a speed change value of the tackle within 150ms according to a triggering threshold value and a locking condition of the EDR according to a boundary value and an equivalence method, converting the speed change value into an acceleration control curve of the tackle through a calculation tool, and transmitting the acceleration control curve to tackle control equipment. The trigger recording accuracy of the EDR can be verified by this method. And the accuracy of EDR recorded data can be verified by comparing the acceleration real-time value detected by the pulley with the EDR recorded data.
3) The EDR power cord was pulled tight leaving 1 weak and easily breakable. When the pulley moves instantly, the power line of the EDR can be torn off, and the verification of the power-off storage function is realized.
The EDR controller adopts an acceleration sensor to perform periodic data acquisition and is used for acquiring the speed change of the vehicle in real time. When the vehicle speed change reaches a collision record threshold value required by regulations, the EDR records and stores vehicle state information before and after collision.
In order to meet the requirement of multiple system tests of the EDR, a collision test pulley is adopted to carry the EDR controller for testing. The collision test pulley verifies the sampling precision of the acceleration, the precision of the trigger threshold value and the precision of the locking condition in a real scene by controlling the accumulated change of the speed.
In order to fix the EDR controller to the crash test block, a transfer iron plate is designed and processed. The iron plate is fixed with the sliding trolley through bolts and is connected with the EDR controller through bolts. The installation levelness of the EDR controller is ensured to be less than 1 degree.
External leads are required to provide power input to the EDR controller without affecting the trolley motion. The program control power supply is placed at a position far away from the sliding trolley, a 30 m-long double-wire power line is selected to be connected with the power supply and the EDR controller, and the power line reserves the movement distance of the sliding trolley.
In order to trigger a collision scene, the movement of the tackle is designed and accurately controlled. And designing a speed change curve within 150ms according to the requirements of a law, converting the speed change curve into an acceleration curve through a calculation tool, and transmitting the acceleration curve to driving equipment of the sliding trolley. The sliding trolley driving device realizes the accurate control of the movement of the sliding trolley through an acceleration sensor with the sampling frequency of 20000Hz and a PID algorithm.
In order to verify the triggering recording precision of the EDR controller, the motion curve of the multi-wheel sliding trolley is designed. And according to the triggering threshold value and the locking condition of the EDR, setting a trolley speed change curve within 150ms according to a boundary value and an equivalence method, converting the curve into an acceleration curve, and transmitting the acceleration curve to the sliding trolley driving equipment.
In order to verify the recording accuracy of the collision data of the EDR controller, the recording data of the EDR controller is extracted. After collision is finished, the PC end extracts the EDR recorded data through a USB-to-serial port tool, then compares the recorded data with the sliding trolley driving acceleration data, and verifies the zero position of the recorded data and the accuracy of the data as shown in figure 1.
In order to verify the power-off storage function of the EDR controller, a power line breaking mode is designed, and whether data can be stored after power-off is verified. The EDR power cord was pulled tight leaving 1 weak and easily breakable. When the pulley moves instantly, the power line of the EDR can be torn off, and the verification of the power-off storage function is realized.
The invention provides an EDR pulley test method which has the following characteristics:
and 1, verifying an EDR system, and realizing through a collision pulley test.
2. The change value of the speed of the pulley within 150ms is set through a boundary value and an equivalence method, and is converted into an acceleration control curve of the pulley, so that the triggering record accuracy verification of the EDR is realized.
3. And comparing the detected acceleration real-time value with the EDR recorded data through a high-precision sensor for pulley 2000 times/s sampling so as to verify the accuracy of the EDR recorded data.
4. The power line is torn off by the movement of the pulley, so that the design of a power-off storage test is realized, and the problem that the power-off and collision triggering cannot be synchronous is solved.
The EDR pulley test method provided by the invention has the following advantages:
the system verification cost of the EDR is greatly reduced, and the limit of test scheduling is eliminated.
And secondly, the triggering recording accuracy of the EDR and the accuracy of data recording are verified, so that the system verification of the EDR is more comprehensive.
And thirdly, the design of a power-off storage test is realized, and the problem that the power-off and collision triggering cannot be synchronized is solved.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (9)
1. A pulley test method of EDR is characterized by comprising the following steps:
s1, carrying the EDR on a pulley for the collision test, and carrying out function verification on the EDR;
s2, setting a speed change value of the tackle within a time T according to the triggering threshold and the locking condition of the EDR, converting the speed change value into an acceleration control curve of the tackle through a calculation tool, and transmitting the acceleration control curve to tackle control equipment;
s3, tensioning the battery wire of the EDR, reserving a weak and easily-broken part, and at the moment of movement of the pulley, the pulley can break the power wire of the EDR, so that the verification of the power-off storage function is realized.
2. The tackle test method of EDR according to claim 1, characterized in that: in step S2, the vehicle speed change value of the carriage within the time T is set by the boundary value and equivalence method.
3. The EDR sled test method of claim 2, wherein: in step S2, the vehicle speed change value of the carriage within 150ms is set by the boundary value and equivalence method.
4. The tackle test method of EDR according to claim 1, characterized in that: in step S2, the accuracy of EDR recorded data is verified by comparing the real-time acceleration value detected by the sled with the EDR recorded data.
5. The tackle test method of EDR according to claim 1, characterized in that: in step S2, the trolley control device realizes accurate control of the movement of the sliding trolley through an acceleration sensor with a sampling frequency of 20000Hz and a PID algorithm.
6. The tackle test method of EDR according to claim 1, characterized in that: in step S1, the installation level of EDR is less than 1 °.
7. The tackle test method of EDR according to claim 1, characterized in that: in step S1, the EDR is fixed to the carriage via the adapter plate.
8. The tackle test method of EDR according to claim 1, characterized in that: in step S2, the EDR performs periodic data acquisition using an acceleration sensor for acquiring the speed change of the trolley in real time, and records and stores the vehicle state information before and after the collision when the speed change reaches a collision record threshold required by the regulations.
9. A readable storage medium, characterized by: the readable storage medium stores executable instructions which, when executed by a processor, are adapted to implement the method of any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110811197.7A CN113567147A (en) | 2021-07-19 | 2021-07-19 | EDR pulley test method and readable storage medium |
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| CN202110811197.7A CN113567147A (en) | 2021-07-19 | 2021-07-19 | EDR pulley test method and readable storage medium |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080043948A (en) * | 2006-11-15 | 2008-05-20 | 현대모비스 주식회사 | Data extracting apparatus in car |
| CN110335370A (en) * | 2019-06-03 | 2019-10-15 | 浙江吉利控股集团有限公司 | A kind of urgent lane keeps update method, device and the automobile of miscellaneous function |
| CN112710911A (en) * | 2020-11-27 | 2021-04-27 | 中汽研汽车检验中心（天津）有限公司 | Power-off storage testing device and method for automobile event data recording system |
| CN112747941A (en) * | 2021-02-22 | 2021-05-04 | 桂林电子科技大学 | Testing device and testing method for EDR system of automobile event data record |
-
2021
- 2021-07-19 CN CN202110811197.7A patent/CN113567147A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080043948A (en) * | 2006-11-15 | 2008-05-20 | 현대모비스 주식회사 | Data extracting apparatus in car |
| CN110335370A (en) * | 2019-06-03 | 2019-10-15 | 浙江吉利控股集团有限公司 | A kind of urgent lane keeps update method, device and the automobile of miscellaneous function |
| CN112710911A (en) * | 2020-11-27 | 2021-04-27 | 中汽研汽车检验中心（天津）有限公司 | Power-off storage testing device and method for automobile event data recording system |
| CN112747941A (en) * | 2021-02-22 | 2021-05-04 | 桂林电子科技大学 | Testing device and testing method for EDR system of automobile event data record |
Non-Patent Citations (1)
| Title |
|---|
| 丁元文，王启波， 崔杰， 杨敦逸， 童兵亮: "基于实车碰撞试验的EDR数据有效性研究", 2020 中国汽车工程学会年会论文集, pages 2064 - 2069 * |
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