CN111999527A - AK protocol wheel speed sensor test system - Google Patents
AK protocol wheel speed sensor test system Download PDFInfo
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- CN111999527A CN111999527A CN202010550219.4A CN202010550219A CN111999527A CN 111999527 A CN111999527 A CN 111999527A CN 202010550219 A CN202010550219 A CN 202010550219A CN 111999527 A CN111999527 A CN 111999527A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
- G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
Abstract
The invention belongs to the technical field of sensor testing, and provides an AK protocol wheel speed sensor testing system, which comprises: the system comprises a data analysis and judgment system, an LCR tester module, an oscilloscope module, a testing mechanism and a laser marking module which are respectively connected with the data analysis and judgment system; the method has the advantages that the waveform of the wheel speed signal is collected through the oscilloscope module and then analyzed, so that whether the wheel speed sensor reaches the performance index is judged according to the characteristics of each waveform; the LCR tester module can test the capacitance value and the capacitance loss value of the wheel speed sensor, high level, low level, test frequency and the like; still be equipped with the laser marking function, the qualified direct whole mark of beating of product test, the automatic date sign of beating that carries on when the defective products appear prevents that the product from flowing, does and traces back.
Description
Technical Field
The invention relates to the technical field of sensor testing, in particular to an AK protocol wheel speed sensor testing system.
Background
The wheel speed sensor is an important component in an automobile ABS system and is used for detecting a wheel rotating speed signal, converting the wheel rotating speed signal into an electric signal through the change of a Hall effect or a magnetic resistance effect and transmitting the electric signal to the ECU, and the ECU judges the speed of the automobile according to the change characteristics of the electric signal so as to regulate and control the work of the ABS system. At present, a wheel speed sensor adopting an AK protocol gradually replaces a general wheel speed sensor, and has a faster detection and communication function compared with the general wheel speed sensor. However, in the test before the wheel speed sensor product leaves the factory, a common test instrument cannot directly perform standard performance test on the output waveform and the capacitance value of the AK protocol wheel speed sensor.
Disclosure of Invention
The invention aims to provide a system for testing an AK protocol wheel speed sensor, which is used for solving the problem of standard performance test of the AK protocol wheel speed sensor before leaving a factory;
in order to achieve the purpose, the invention adopts the technical scheme that:
an AK protocol wheel speed sensor test system, comprising: the system comprises a data analysis and judgment system, an LCR tester module, an oscilloscope module, a testing mechanism and a laser marking module which are respectively connected with the data analysis and judgment system;
the testing mechanism is used for simulating the rotation of an automobile tire so that a wheel speed sensor of a tested AK protocol acquires a wheel speed signal;
the LCR tester module is used for collecting the capacitance value of the tested AK protocol wheel speed sensor and sending the capacitance value to the data analysis and judgment system;
the oscilloscope module is used for receiving a wheel speed signal sent by the wheel speed sensor of the AK protocol to be detected, converting the wheel speed signal into a wheel speed waveform and sending the wheel speed waveform to the data analysis and judgment system;
the data analysis and judgment system is used for receiving the capacitance value sent by the LCR tester module and the wheel speed waveform sent by the oscilloscope module, and judging whether the wheel speed sensor of the AK protocol to be tested reaches the standard;
if the mark reaches the standard, sending a complete marking signal to the laser marking module;
if the date does not reach the standard, a date reaching signal is sent to the laser marking module;
the laser marking module is used for receiving a marking signal sent by the data analysis and judgment system and marking the tested AK protocol wheel speed sensor; wherein the marking signal comprises the complete marking signal and the date compliance signal.
Further, the data analysis and judgment system comprises an analysis and judgment module, which is used for judging whether the wheel speed sensor of the tested AK protocol reaches the standard;
wherein, judging whether the detected AK protocol wheel speed sensor reaches the standard specifically comprises:
judging whether the capacitance value is within a preset capacitance value range and whether the wheel speed waveform is consistent with a preset waveform, if so, enabling the wheel speed sensor of the tested AK protocol to reach the standard;
and if the capacitance value is not in the preset capacitance value range and/or the wheel speed waveform is inconsistent with the preset waveform, judging that the wheel speed sensor of the tested AK protocol does not reach the standard.
Further, the data analysis and judgment system also comprises a display module;
the display module is used for displaying the test information of the tested AK protocol wheel speed sensor and the working state of the AK protocol wheel speed sensor test system.
Further, the data analysis and judgment system also comprises a parameter setting module;
the parameter setting module is used for acquiring a test parameter value of a wheel speed sensor of a preset AK protocol.
Furthermore, the data analysis and judgment system further comprises a manual control module, which is used for acquiring the test information of the wheel speed sensor of the AK protocol to be tested under the preset working condition and informing a tester through the display module.
Furthermore, the data analysis and judgment system further comprises a data query module for storing the test information of the wheel speed sensor of the tested AK protocol.
Compared with the prior art, the invention at least comprises the following beneficial effects:
(1) the test system collects the waveform of the wheel speed signal through the oscilloscope module, and then analyzes the waveform to judge whether the wheel speed sensor reaches the performance index or not according to the characteristics of each waveform;
(2) the testing system can test the capacitance value and the capacitance loss value of the wheel speed sensor by arranging the LCR tester module, and also obtains information such as high level, low level, testing frequency and the like of the wheel speed sensor by the acquisition of the oscilloscope module and the analysis of the data analysis and judgment system;
(3) the test system is also provided with a laser marking function, the product is tested to be qualified, complete marking is directly carried out, and date code marking is automatically carried out when defective products appear, so that the product is prevented from flowing out, and the tracing is carried out;
(4) the test system comprises a data query module for recording all tested product data for query.
Drawings
FIG. 1 is a schematic diagram of an AK protocol wheel speed sensor testing system according to the present invention;
FIG. 2 is a flow chart of determining whether a product is qualified in an AK protocol wheel speed sensor testing system according to the present invention;
FIG. 3 is a flow chart of another method for determining whether a product is qualified in an AK protocol wheel speed sensor testing system according to the present invention;
FIG. 4 is a schematic diagram of a data analysis and determination system in an AK protocol wheel speed sensor test system according to the present invention;
fig. 5 is a functional diagram of AK protocol bit values of a wheel speed sensor of a measured AK protocol in an AK protocol wheel speed sensor testing system according to the present invention.
Detailed Description
The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the drawings, but the present invention is not limited to these embodiments.
Example one
As shown in fig. 1, the present invention provides a wheel speed sensor testing system of AK protocol, comprising: the system comprises a data analysis and judgment system, an LCR tester module, an oscilloscope module, a testing mechanism and a laser marking module which are respectively connected with the data analysis and judgment system; the LCR tester and the oscilloscope are also respectively connected with the testing mechanism;
the testing mechanism is used for simulating the rotation of an automobile tire to enable a wheel speed sensor of a tested AK protocol to acquire a wheel speed signal;
the testing mechanism comprises a servo motor which is used for driving the automobile wheel to rotate and simulating the working state of the automobile wheel in the running process.
The LCR tester module is used for collecting the capacitance value of the tested AK protocol wheel speed sensor and sending the capacitance value to the data analysis and judgment system;
the oscilloscope module is used for receiving the wheel speed signal sent by the wheel speed sensor of the AK protocol to be detected, converting the wheel speed signal into a wheel speed waveform and sending the wheel speed waveform to the data analysis and judgment system;
the data analysis and judgment system is used for receiving the capacitance value sent by the LCR tester module and the wheel speed waveform signal sent by the oscilloscope module and judging whether the wheel speed sensor of the tested AK protocol reaches the standard or not;
if the mark reaches the standard, sending a complete marking signal to the laser marking module;
if the date does not reach the standard, a date reaching signal is sent to the laser marking module;
the laser marking module is used for receiving marking signals sent by the data analysis and judgment system and marking the tested AK protocol wheel speed sensor; wherein, the marking signal comprises a complete marking signal and a date reaching signal;
this test system is equipped with the laser marking function, and the qualified complete mark of directly carrying on of product test is including product batch number, date of production etc. and carries out the date sign mark automatically when bad product appears, prevents that bad product from flowing, is convenient for trace back.
Preferably, the data analysis and judgment system comprises an analysis and judgment module for judging whether the wheel speed sensor of the tested AK protocol reaches the standard;
wherein, judging whether the detected AK protocol wheel speed sensor reaches the standard specifically comprises:
judging whether the capacitance value is within a preset capacitance value range and whether the wheel speed waveform signal is consistent with a preset waveform signal, if so, enabling the wheel speed sensor of the tested AK protocol to reach the standard;
and if the capacitance value is not in the preset capacitance value range or the wheel speed waveform signal is inconsistent with the preset waveform signal, judging that the wheel speed sensor of the tested AK protocol does not reach the standard.
Specifically, as shown in fig. 2, the method for determining whether the wheel speed waveform is consistent with the preset waveform includes:
assuming that the low pulse width of the waveform is 2000 mus under the condition that the waveform is not changed, if the current waveform has the condition that the waveform is changed, the current waveform must have a low pulse width of at least 4000 mus, judging that the waveform is changed by calculating whether the low pulse width of the current waveform is larger than 3000 mus or not and judging that the current wheel speed waveform is inconsistent with the preset waveform if the low pulse width of the current waveform is larger than 3000 mus; if the low pulse width is not larger than 3000 mus, the waveform is judged not to be changed, and then the current wheel speed waveform is judged to be consistent with the preset waveform.
Preferably, the data analysis and judgment system further includes:
the device comprises a display module, a test module and a control module, wherein the display module is used for displaying the test information of the tested AK protocol wheel speed sensor and the working state of the AK protocol wheel speed sensor test system;
the test information of the tested AK protocol wheel speed sensor comprises the batch number of the tested AK protocol wheel speed sensor, the serial number of the current tested AK protocol wheel speed sensor, the wheel speed waveform collected by the tested AK protocol wheel speed sensor, the capacitance value of the tested AK protocol wheel speed sensor, the judgment result of whether the current tested AK protocol wheel speed sensor is qualified, the AK protocol bit value of the tested AK protocol wheel speed sensor and the like;
as shown in fig. 5, the AK protocol bit value of the wheel speed sensor of the AK protocol to be detected has nine bytes, which are 0-8, each byte is encoded to output 1 or 0, each byte represents a performance parameter of the wheel speed sensor of the AK protocol to be detected, whether the code output by each byte of the AK protocol bit value is consistent with the preset AK protocol bit standard value is judged through the acquired waveform, if so, the current wheel speed sensor of the AK protocol to be detected has good performance, and the AK protocol bit value data is displayed through the display module.
Preferably, the parameter setting module is configured to obtain a test parameter value of a wheel speed sensor of a preset AK protocol;
the test parameters comprise product names, upper and lower wave high level limits, upper and lower wave medium level limits, upper and lower wave low level limits, upper and lower duty ratio limits, upper and lower capacitance value limits, upper and lower capacitance loss value limits, upper and lower parking time limits, high, medium and low level compensation values, capacitance compensation values, AK protocol bit standard values, wheel rotating speeds and the like.
Through the setting of the test parameters, clearer wheel speed waveform images and capacitance values of the wheel speed sensor of the tested AK protocol can be obtained conveniently, and whether the wheel speed waveform is consistent with a preset waveform or not can be judged better;
in addition, corresponding test parameters can be set according to the name of the product, the test parameters can be called next time after the test parameters are set and stored by clicking; the product name can be added by itself.
Preferably, the manual control module is used for acquiring test information of the wheel speed sensor of the AK protocol to be tested under a preset working condition and informing a tester through the display module;
the manual control module can carry out the independent analysis to single AK agreement wheel speed sensor that is surveyed, can study the operating condition of AK agreement wheel speed sensor under conditions such as different voltage, work air gap, angle, rotational speed, make things convenient for research personnel to research and develop the improvement to the product.
And the data query module is used for storing the test information of the wheel speed sensor of the tested AK protocol.
In the data query module, an operator can check the past detection information, check the past detection information according to time and product names, and can export the test information in a table form for checking; in addition, the waveforms corresponding to each set of data can also be queried.
Example two
As shown in fig. 1, the present invention provides a wheel speed sensor testing system of AK protocol, comprising: the system comprises a data analysis and judgment system, an LCR tester module, an oscilloscope module, a testing mechanism and a laser marking module which are respectively connected with the data analysis and judgment system;
the testing mechanism is used for acquiring a wheel speed signal by the wheel speed sensor of the AK protocol to be tested and sending the wheel speed signal to the oscilloscope module;
the testing mechanism comprises a servo motor which is used for controlling the rotating speed of the wheel and simulating the working state of the automobile wheel in the running process.
The LCR tester module is used for collecting the capacitance value of the tested AK protocol wheel speed sensor and sending the capacitance value to the data analysis and judgment system;
the oscilloscope module is used for receiving the wheel speed signal sent by the testing mechanism, converting the wheel speed signal into a wheel speed waveform signal and sending the wheel speed waveform signal to the data analysis and judgment system;
the data analysis and judgment system is used for receiving the capacitance value sent by the LCR tester module and the wheel speed waveform signal sent by the oscilloscope module and judging whether the wheel speed sensor of the tested AK protocol reaches the standard or not;
if the mark reaches the standard, sending a complete marking signal to the laser marking module;
if the date does not reach the standard, a date reaching signal is sent to the laser marking module;
the laser marking module is used for receiving marking signals sent by the data analysis and judgment system and marking the tested AK protocol wheel speed sensor; wherein, the marking signal comprises a complete marking signal and a date reaching signal;
this test system is equipped with the laser marking function, and the qualified complete mark of directly carrying on of product test is including product batch number, date of production etc. and carries out the date sign mark automatically when bad product appears, prevents that bad product from flowing, is convenient for trace back.
Preferably, the data analysis and judgment system comprises an analysis and judgment module for judging whether the wheel speed sensor of the tested AK protocol reaches the standard;
as shown in fig. 3, the step of determining whether the wheel speed sensor of the measured AK protocol reaches the standard specifically includes:
judging whether the capacitance value is within a preset capacitance value range and whether the wheel speed waveform signal is consistent with a preset waveform signal, if so, enabling the wheel speed sensor of the tested AK protocol to reach the standard;
and if the capacitance value is not in the preset capacitance value range or the wheel speed waveform signal is inconsistent with the preset waveform signal, judging that the wheel speed sensor of the tested AK protocol does not reach the standard.
Specifically, the method for determining whether the wheel speed waveform is consistent with the preset waveform comprises the following steps:
judging whether the waveform is changed or not through the pulse number under one frame, obtaining the pulse number of the current frame through a manual control module, then setting the upper and lower limit ranges of the number of high pulse widths through a parameter setting module, and judging that the waveform is changed when the number of the high pulse widths in the waveform obtained by testing is not in the preset range, thereby judging that the current wheel speed waveform is inconsistent with the preset waveform; when the number of high pulse widths in the waveform obtained by testing is within a preset range, judging that the waveform is not changed, and further judging that the current wheel speed waveform is consistent with a preset waveform;
preferably, the data analysis and judgment system further includes:
the device comprises a display module, a test module and a control module, wherein the display module is used for displaying the test information of the tested AK protocol wheel speed sensor and the working state of the AK protocol wheel speed sensor test system;
the test information of the tested AK protocol wheel speed sensor comprises the batch number of the tested AK protocol wheel speed sensor, the serial number of the current tested AK protocol wheel speed sensor, the wheel speed waveform collected by the tested AK protocol wheel speed sensor, the capacitance value of the tested AK protocol wheel speed sensor, the judgment result of whether the current tested AK protocol wheel speed sensor is qualified, the AK protocol bit value of the tested AK protocol wheel speed sensor and the like;
as shown in fig. 5, the AK protocol bit value of the wheel speed sensor of the AK protocol to be detected has nine bytes, which are 0-8, each byte is encoded to output 1 or 0, each byte represents a performance parameter of the wheel speed sensor of the AK protocol to be detected, whether the code output by each byte of the AK protocol bit value is consistent with the preset AK protocol bit standard value is judged through the acquired waveform, if so, the current wheel speed sensor of the AK protocol to be detected has good performance, and the AK protocol bit value data is displayed through the display module.
Preferably, the parameter setting module is configured to obtain a test parameter value of a wheel speed sensor of a preset AK protocol;
the test parameters comprise product names, upper and lower wave high level limits, upper and lower wave medium level limits, upper and lower wave low level limits, upper and lower duty ratio limits, upper and lower capacitance value limits, upper and lower capacitance loss value limits, upper and lower parking time limits, high, medium and low level compensation values, capacitance compensation values, AK protocol bit standard values, wheel rotating speeds and the like.
Through the setting of the test parameters, clearer wheel speed waveform images and capacitance values of the wheel speed sensor of the tested AK protocol can be obtained conveniently, and whether the wheel speed waveform is consistent with a preset waveform or not can be judged better;
in addition, corresponding test parameters can be set according to the name of the product, the test parameters can be called next time after the test parameters are set and stored by clicking; the product name can be added by itself.
Preferably, the manual control module is used for acquiring test information of the wheel speed sensor of the AK protocol to be tested under a preset working condition and informing a tester through the display module;
the manual control module can carry out the independent analysis to single AK agreement wheel speed sensor that is surveyed, can study the operating condition of AK agreement wheel speed sensor under conditions such as different voltage, work air gap, angle, rotational speed, make things convenient for research personnel to research and develop the improvement to the product.
And the data query module is used for storing the test information of the wheel speed sensor of the tested AK protocol.
In the data query module, an operator can check the past detection information, check the past detection information according to time and product names, and can export the test information in a table form for checking; in addition, the waveforms corresponding to each set of data can also be queried.
The testing system collects the waveform of the wheel speed signal through the oscilloscope module, and then analyzes the waveform to judge whether the wheel speed sensor reaches the performance index or not through the characteristic of each waveform; the capacitance value and the capacitance loss value of the wheel speed sensor can be tested through the LCR tester module, and information such as high level, low level, testing frequency and the like of the wheel speed sensor is obtained through acquisition of the oscilloscope module and analysis of the data analysis and judgment system; this test system still is equipped with the laser marking function, and the qualified direct whole mark of beating of product test carries out the date sign indicating number voluntarily when the defective products appear, prevents that the product from flowing, does to trace back.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (6)
1. An AK protocol wheel speed sensor test system, comprising: the system comprises a data analysis and judgment system, an LCR tester module, an oscilloscope module, a testing mechanism and a laser marking module which are respectively connected with the data analysis and judgment system;
the testing mechanism is used for simulating the rotation of an automobile tire and enabling a wheel speed sensor of a tested AK protocol to acquire a wheel speed signal;
the LCR tester module is used for collecting the capacitance value of the tested AK protocol wheel speed sensor and sending the capacitance value to the data analysis and judgment system;
the oscilloscope module is used for receiving a wheel speed signal sent by the wheel speed sensor of the AK protocol to be detected, converting the wheel speed signal into a wheel speed waveform and sending the wheel speed waveform to the data analysis and judgment system;
the data analysis and judgment system is used for receiving the capacitance value sent by the LCR tester module and the wheel speed waveform sent by the oscilloscope module, and judging whether the wheel speed sensor of the AK protocol to be tested reaches the standard;
if the mark reaches the standard, sending a complete marking signal to the laser marking module;
if the date does not reach the standard, a date reaching signal is sent to the laser marking module;
the laser marking module is used for receiving a marking signal sent by the data analysis and judgment system and marking the tested AK protocol wheel speed sensor; wherein the marking signal comprises the complete marking signal and the date compliance signal.
2. The AK protocol wheel speed sensor testing system as claimed in claim 1, wherein the data analysis and determination system comprises an analysis and determination module for determining whether the AK protocol wheel speed sensor under test is up to standard;
wherein, judging whether the detected AK protocol wheel speed sensor reaches the standard specifically comprises:
judging whether the capacitance value is within a preset capacitance value range and whether the wheel speed waveform is consistent with a preset waveform, if so, enabling the wheel speed sensor of the tested AK protocol to reach the standard;
and if the capacitance value is not in the preset capacitance value range and/or the wheel speed waveform is inconsistent with the preset waveform, judging that the wheel speed sensor of the tested AK protocol does not reach the standard.
3. The AK protocol wheel speed sensor testing system as claimed in claim 2, wherein the data analysis and determination system further comprises a display module;
the display module is used for displaying the test information of the tested AK protocol wheel speed sensor and the working state of the AK protocol wheel speed sensor test system.
4. The AK protocol wheel speed sensor testing system as claimed in claim 2, wherein the data analysis and determination system further comprises a parameter setting module;
the parameter setting module is used for acquiring a test parameter value of a wheel speed sensor of a preset AK protocol.
5. The AK protocol wheel speed sensor testing system of claim 2, wherein the data analysis and determination system further comprises a manual control module for obtaining early-stage debugging information of the AK protocol wheel speed sensor testing system and informing a tester through a display module.
6. The system of claim 2, wherein the data analysis and determination system further comprises a data query module for storing the testing information of the wheel speed sensor under AK protocol.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113093567A (en) * | 2021-03-24 | 2021-07-09 | 一汽奔腾轿车有限公司 | Simulation system and simulation method of AK protocol wheel speed sensor |
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