CN102564487A - Automobile sensor detection equipment and method for detecting performance of sensor by utilizing same - Google Patents
Automobile sensor detection equipment and method for detecting performance of sensor by utilizing same Download PDFInfo
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- CN102564487A CN102564487A CN2012100225006A CN201210022500A CN102564487A CN 102564487 A CN102564487 A CN 102564487A CN 2012100225006 A CN2012100225006 A CN 2012100225006A CN 201210022500 A CN201210022500 A CN 201210022500A CN 102564487 A CN102564487 A CN 102564487A
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Abstract
The invention discloses automobile sensor detection equipment and a method for detecting the performances of sensors by utilizing the same. The automobile sensor detection equipment comprises a working table, a digital circuit transmission system, a workpiece clamping mechanism, a detection-air-gap regulating and detection mechanism, a signal system, a control system, a data acquisition system and a signal analysis system, wherein the digital circuit transmission system is arranged on the working table; the control system is arranged in the working table; a signal wheel and a sensor power supply are arranged in the signal system; and an acquisition card and a current sensor are arranged in the data acquisition system. According to the invention, the performances of a crankshaft position sensor, an ABS (Anti-lock Brake System) sensor, a camshaft position sensor, a vehicle speed sensor and the like can be subjected to comprehensive and automatic detection; the performances of the sensors can be comprehensively and automatically detected; the automobile sensor detection equipment not only has high precision, high stability and high efficiency and is easy to operate, but also is not influenced by the subjectivity of an operator; and the requirement on the optimal control of the performances of the sensors in the development and manufacturing of the sensors can be met.
Description
Technical field
The present invention relates to the automobile sensor detection range, relate in particular to a kind of to automobile crane position transducer, anti-lock braking system (ABS:Anti-lock Braking System) sensor, CMPS Camshaft Position Sensor, and vehicle speed sensor performance carry out the Apparatus and method for of comprehensive detection.
Background technology
Development along with Domestic Automotive Industry; The application of automobile sensor more and more widely; Wherein crankshaft position sensor, CMPS Camshaft Position Sensor, vehicle speed sensor and abs sensor are one of sensors very crucial in automobile engine control system, the automobile safety system, and it is determining duty and performance, the automobile braking safety property of engine.Crankshaft position sensor is called engine speed and CKP again, and it is used for collecting crankshaft rotational angle and engine rotational speed signal, and input electronic control unit (ECU), so that confirm time of ignition and oil spout constantly.CMPS Camshaft Position Sensor is called the cylinder identification sensor again, and it is used to gather the position signalling of distribution cam axle, and input ECU, so that ECU identification cylinder compression top center, thereby carry out order oil spout control, time of ignition control and detonation control.Identify time of ignition for the first time when in addition, camshaft-position signal also is used for engine start.Vehicle speed sensor is used to detect the speed of a motor vehicle of electronic automobile, and ECU controls engine idle with this input signal, the torque converter locking of automatic transmission, other functions such as the switching of automatic gearbox gear shifting and cooling fan of engine and the constant speed of cruising.Abs sensor is the ABS that is applied in motor vehicle, abs sensor through with the gear ring effect of rotating synchronously with wheel, export one group of quasi sine ac signal; Its frequency is relevant with wheel speed with amplitude, and this output signal passes toward the ABS electronic control unit, to realize taking turns the real-time monitoring of speed; Prevent wheel locking; Automobile still can be turned under on-position, guarantee the braking direction stability of automobile, prevent to produce and break away and sideslip.
At present, automotive sensor technology is mainly grasped by states such as America and Europe, Japan and China is carried out blockade on new techniques.Though domesticly obtained very big development in recent years, receive the influence of product design technology and detection technique, dosimetric sensors also is in the low side level, awaits further to improve and development.With regard to sensor; The detection of domestic these several kinds of sensors also rests on more elementary level; It mainly adopts oscillograph and simple test fixture to carry out product and detects, and this exists and can not carry out the drawback that comprehensive and systematic detection, partial properties can't detect to the output performance of product, not only detect inconvenient, efficient is low; Simultaneously testing result receives that operator's subjective factor influences greatly, the product poor controllability, and product stability and reliability can not get assurance.
Summary of the invention
A purpose of the present invention is; A kind of automobile sensor checkout equipment is provided; It can to crankshaft position sensor, abs sensor, CMPS Camshaft Position Sensor, and the performance of vehicle speed sensor carry out comprehensively detecting automatically, have the function of complete detection sensor performance;
Another object of the present invention is to; A kind of method of utilizing automobile sensor checkout equipment detecting sensor performance is provided; Can be comprehensively detecting sensor performance automatically, not only precision height, good stability, efficient height, easy to operate, and do not receive subjective effect of operators.
For realizing above-mentioned purpose; The present invention provides a kind of automobile sensor checkout equipment; Comprise: working plate, it also comprises several roads kinematic train of being installed on the working plate, clamping workpiece mechanism, detect air gap adjusting and testing agency, signal system, be located at control system, data acquisition system (DAS) in the working plate, reach Signal Analysis System; Include the signal wheel in the said signal system, reach probe power, include capture card in the data acquisition system (DAS), reach current sensor; Control system is used for test process is moved control; During test; Sensor to be measured is installed on the working plate through clamping workpiece mechanism; Probe power is this sensor power supply to be measured, and this sensor to be measured is crankshaft position sensor, abs sensor, CMPS Camshaft Position Sensor or vehicle speed sensor; Air gap is regulated and the mounting distance between sensor to be measured and the signal wheel is detected and adjusted in testing agency through detecting; When kinematic train drives the rotation of signal wheel; Sensor to be measured produces signal output; Capture card is gathered the signal of this signal output and current sensor, and is sent to Signal Analysis System analysis.
Wherein, include bearing seat, transmission shaft, motor in the kinematic train of said several roads and be installed on bearing seat and motor between shaft coupling, said signal wheel is installed on the transmission shaft, this signal wheel is through a signal wheel fast assembly and disassembly mechanism and transmission shaft dismounting mutually.
Clamping workpiece of the present invention mechanism includes the sensor mount pad, be located at replaceable clamping workpiece frock on the sensor mount pad, and clamping cylinder.
Include the air gap detecting sensor in said detection air gap adjusting and the testing agency, reach in order to the milscale of conditioning signal wheel with sensor distance to be measured, this air gap detecting sensor is a distance detecting laser instrument.
Control system of the present invention is a PLC control system or a single-chip computer control system, this PLC control system or single-chip computer control system respectively with kinematic train, detect the air gap adjusting with testing agency, reach Signal Analysis System and electrically get in touch.
The present invention also comprises a sensor signal connecting interface, and this sensor signal connecting interface one side electrically is connected with sensor to be measured, opposite side respectively with probe power, and data acquisition system (DAS) electrically connect.
Among the present invention, include host computer in the said Signal Analysis System, this host computer stored is useful on analytic curve shaft position sensor, abs sensor, CMPS Camshaft Position Sensor, reaches the respective algorithms of vehicle speed sensor output signal characteristic.
Further, the present invention also provides a kind of method of utilizing automobile sensor checkout equipment detecting sensor performance, and it comprises the steps:
Sensor to be measured is installed on the automobile sensor checkout equipment through clamping workpiece mechanism, starts test, this sensor to be measured is crankshaft position sensor, abs sensor, CMPS Camshaft Position Sensor or vehicle speed sensor;
Select sensor type to be measured, parameter is set, begin this sensor to be measured is tested when Pretesting;
Control system is controlled rotating speed of motor, treat that motor speed is stable after, Signal Analysis System reads the signal of capture card;
Signal Analysis System carries out data processing to signal, and preserves test result automatically;
Judge whether to proceed test, if then carry out the next round test; If not, then log off.
Wherein, the said step that parameter is set comprises: judge whether to revise parameter, if not, then directly begin this sensor to be measured is tested; If, then carry out parameter modification, deletion, reach and preserve operation, begin then this sensor to be measured is tested; In the parameter modification operation, according to the different sensor type, the test judgement condition is set, after selecting preservation, open program next time, under the condition that does not change the sensor type selection, test later on is same decision condition.
Among the present invention; Said Signal Analysis System reads in the signals step of capture card; The capture card signal that reads comprises the current signal and the output voltage signal of current sensor to be measured; Signal Analysis System carries out data processing to this output voltage signal, and this data processing comprises phase place judgement, peak-to-peak value, high level, low level, rise time, fall time, conducting electrical angle, signal symmetry degree, reaches curve display.
Automobile sensor checkout equipment of the present invention and utilize the method for its detecting sensor performance; It can to crankshaft position sensor, abs sensor, CMPS Camshaft Position Sensor, and the performance of vehicle speed sensor carry out comprehensively detecting automatically; The all round properties to sensor of realizing high precision, high stability detects and data storage automatically; In satisfying sensor exploitation and making to the Optimal Control of sensor performance, not only precision height, good stability, efficient height, easy to operate, and do not receive subjective effect of operators; The product controllability is high, can effectively guarantee product stability and reliability.
Description of drawings
Fig. 1 is the external structure synoptic diagram of automobile sensor checkout equipment one specific embodiment of the present invention;
Fig. 2 is the internal module synoptic diagram of automobile sensor checkout equipment one specific embodiment of invention;
Fig. 3 for a kind of specific embodiment of the present invention in application with the mounting structure synoptic diagram of sensor to be measured;
Fig. 4 is the side structure synoptic diagram of clamping workpiece mechanism among Fig. 3;
Fig. 5 is the mounting structure synoptic diagram of another specific embodiment of clamping workpiece mechanism among the present invention and sensor to be measured;
Fig. 6 is the left side synoptic diagram of Fig. 5;
Fig. 7 utilizes the method flow diagram of automobile sensor checkout equipment detecting sensor performance for the present invention;
Fig. 8 utilizes the schematic flow sheet of a kind of specific embodiment of method of automobile sensor checkout equipment detecting sensor performance for the present invention.
Embodiment
Shown in Fig. 1-4; The present invention provides a kind of automobile sensor checkout equipment; It comprises: working plate 10 also comprises several roads kinematic train 11 of being installed on the working plate 10, clamping workpiece mechanism 12, detects air gap adjusting and testing agency, signal system, is located at control system 30, data acquisition system (DAS) in the working plate 10, reaches Signal Analysis System.Wherein, include signal wheel 13 in the said signal system, reach probe power 14, include capture card 32 in the said data acquisition system (DAS), reach current sensor 34.
Among the present invention, include bearing seat 112, transmission shaft 114, motor 116 in said several roads kinematic train 11 and be installed on bearing seat 112 and motor 116 between shaft coupling 118.Wherein, motor 116 can adopt servomotor or other motor all can.As a kind of selectivity embodiment of the present invention, one tunnel kinematic train 11 can be set; As a kind of preferred embodiment of the present invention, two-way kinematic train 11 can also be set, can realize so simultaneously the test of two sensors is improved testing efficiency greatly.
In the specific embodiment of the invention, clamping workpiece mechanism 12 includes sensor mount pad 122, be located at replaceable clamping workpiece frock 124 on the sensor mount pad 122, and clamping cylinder 126.Dissimilar sensors to be measured 20 is fixedly installed on the sensor mount pad 122 through this replaceable clamping workpiece frock 124 and clamping cylinder 126, thereby is installed on the automobile sensor checkout equipment of the present invention.Automobile sensor checkout equipment of the present invention goes for crankshaft position sensor, abs sensor, CMPS Camshaft Position Sensor, reaches the detection of vehicle speed sensor, and 20 of dissimilar sensors to be measured need to change corresponding replaceable clamping workpiece frocks 124 and can install mutually with sensor mount pad 122.As a kind of specific embodiment of the present invention, can the be shared same clamping workpiece of said crankshaft position sensor and CMPS Camshaft Position Sensor mechanism 12 clamps.As another kind of specific embodiment of the present invention, like Fig. 5, shown in 6, said sensor 20 ' to be measured is through clamping cylinder 126 ' and the 122 ' fixed installation of sensor mount pad, and this sensor 20 ' to be measured is a vehicle speed sensor.
Special, the present invention also is provided with adjusting of detection air gap and the testing agency that is used to detect gap between sensor 20 to be measured and the signal wheel 13.As a kind of specific embodiment of the present invention, include air gap detecting sensor 132 in said detection air gap adjusting and the testing agency, reach in order to the milscale 134 of conditioning signal wheel 13 with sensor 20 distances to be measured.This air gap detecting sensor 132 can be a distance detecting laser instrument, and it can detect the air gap between sensor 20 to be measured and the signal wheel 13 accurately, thereby through the distance between milscale 134 initial adjustments sensor 20 to be measured and the signal wheel 13.This detects, and air gap is regulated and the setting of testing agency, can guarantee to test conveniently, accurately the setting in gap, can be good at the control detection quality.
As a kind of specific embodiment of the present invention; Include host computer 40 in the said Signal Analysis System, this host computer stored is useful on analytic curve shaft position sensor, abs sensor, CMPS Camshaft Position Sensor, reaches the respective algorithms of vehicle speed sensor output signal characteristic.Control system 30 returns to host computer 40 with the data of gathering, and host computer 40 can be provided with the rotating speed of motor 116 through control system 30.In addition, this host computer 40 can also read the signal of capture card 32 and the parameter of capture card 32 is provided with.As a kind of preferred embodiment of the present invention, this automobile sensor checkout equipment can adopt man-machine interface, this man-machine interface by action button, pilot lamp, digital display meter, and display (not shown) form.Structural design of the present invention has good operability fully from human engineering, can reduce operator's work fatigue degree to greatest extent, enhances productivity and guarantees the quality of production.Simultaneously, the man-machine interface that it is friendly can succinctly, accurately be provided with test parameter according to dissimilar sensors to be measured, and test data is returned to operating personnel in real time accurately, makes whole test process accurately directly perceived more.
In addition, in this automobile sensor checkout equipment, also be provided with sensor signal connecting interface (not shown), this sensor signal connecting interface one side and sensor to be measured 20 electrically connects, opposite side respectively with probe power 14, and data acquisition system (DAS) electrically connect.A kind of selectivity embodiment as invention can also be provided with storer and mini-printer (not shown) in this automobile sensor checkout equipment, make automobile sensor checkout equipment of the present invention have data storage function and testing result printing function.
Automobile sensor checkout equipment of the present invention, it can detect and judge crankshaft position sensor, abs sensor, CMPS Camshaft Position Sensor, the voltage output value that reaches vehicle speed sensor and the technical indicator whether working current satisfies product automatically; It can also detect and judge whether the installation of crankshaft position sensor and vehicle speed sensor inner member is correct automatically; And the phase place of crankshaft position sensor detected and judge automatically; Can detect and judge whether the frequency of abs sensor meets the technical indicator of product automatically, can also detect and judge whether the response time of CMPS Camshaft Position Sensor and vehicle speed sensor meets the technical indicator of product automatically.In the present invention, electric current is the project that each sensor to be measured must detect, and it is that the signal of gathering current sensor 34 through capture card 32 then obtains through current sensor 34 of series connection in test loop.Voltage output, response time, phase place, and these technical indicators such as frequency all be that capture card 32 is gathered the signal of sensor 20 to be measured and drawn through corresponding algorithm; Signal Processing all can be customized according to client's real needs; The client wants to understand which characteristic of signal, and it is just passable that Signal Analysis System provides the corresponding algorithm of these signal characteristics.
When automobile sensor checkout equipment of the present invention uses; Sensor 20 to be measured is installed on the test position of working plate 10 through clamping workpiece mechanism 12; Probe power 14 is these sensor 20 power supplies to be measured, and this sensor 20 to be measured can be crankshaft position sensor, abs sensor, CMPS Camshaft Position Sensor or vehicle speed sensor.Air gap is regulated and the mounting distance between sensor 20 to be measured and the signal wheel 13 is detected and adjusted in testing agency through detecting; When kinematic train 11 drives 13 rotations of signal wheel; Sensor 20 to be measured produces signal output; Capture card 32 is gathered the signal of this signal output and current sensor 14, and is sent to Signal Analysis System analysis, thereby the over-all properties of sensor 20 to be measured is tested accurately; And test data preserved, judge automatically according to test result whether the performance of sensor is qualified.
Further, as shown in Figure 7, the present invention also provides a kind of method of utilizing automobile sensor checkout equipment detecting sensor performance, and it comprises the steps:
Step 1, sensor to be measured is installed on the automobile sensor checkout equipment through clamping workpiece mechanism, starts test, this sensor to be measured is crankshaft position sensor, abs sensor, CMPS Camshaft Position Sensor or vehicle speed sensor.
The sensor type to be measured of Pretesting is worked as in step 2, selection, and parameter is set, and begins this sensor to be measured is tested.It is the condition that detection is set that parameter is set, as shown in Figure 8 as a kind of specific embodiment of the present invention, and this step that parameter is set also comprises: judge whether to revise parameter, if not, then directly begin this sensor to be measured is tested; If, then carry out parameter modification, deletion, reach and preserve operation, begin then this sensor to be measured is tested.In the parameter modification operation, according to the different sensor type, the test judgement condition is set, after selecting preservation, open program next time, under the condition that does not change the sensor type selection, test later on is same decision condition.Because automobile sensor checkout equipment of the present invention can be provided with repeatedly test condition identical and different rotating speeds and correspondence thereof simultaneously; After the preservation; The each test of acquiescence is all undertaken by current parameter under the situation that does not change modification; When only needing a rotating speed once to test, then need the unwanted rotating speed of deletion down be set in parameter.
Step 3, control system are controlled rotating speed of motor, treat that motor speed is stable after, Signal Analysis System reads the signal of capture card.Wherein, motor can adopt servomotor or other motor all can, said control system can be PLC control system or single-chip computer control system.In the present invention, said Signal Analysis System reads in the signals step of capture card, and the capture card signal that reads comprises the current signal and the output voltage signal of current sensor to be measured.Current signal only need show; Signal Analysis System carries out data processing to this output voltage signal, and this data processing comprises phase place judgement, peak-to-peak value, high level, low level, rise time, fall time, conducting electrical angle, signal symmetry degree, reaches curve display.
Step 4, Signal Analysis System carry out data processing to signal, and preserve test result automatically.As a kind of selectivity embodiment of the present invention, can also print to make things convenient for paper spare to consult this test result.
Step 5, judge whether to proceed test, if then carry out next round test; If not, then log off.As a kind of specific embodiment of the present invention, before judging whether to proceed test, also comprise the judgement of whether preserving curve data, if judge whether to proceed test again after then curve data being preserved; If not, then directly judge whether to begin the next round test.Further, when proceeding next round when test, whether the condition that at first need select to test with last is consistent, if consistent, then direct entering begins step that this sensor to be measured is tested; If inconsistent, then get into the step of selecting when the sensor type to be measured of Pretesting.
In sum; Automobile sensor checkout equipment of the present invention and utilize the method for its detecting sensor performance; It can to crankshaft position sensor, abs sensor, CMPS Camshaft Position Sensor, and the performance of vehicle speed sensor carry out comprehensively detecting automatically, realize that all round properties to sensor of high precision, high stability detects and data storage automatically, in satisfying the sensor exploitation and making to the Optimal Control of sensor performance; Not only precision height, good stability, efficient are high, easy to operate; And do not receive subjective effect of operators, the product controllability is high, can effectively guarantee product stability and reliability.
The above; For the person of ordinary skill of the art; Can make other various corresponding changes and distortion according to technical scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection domain of accompanying Claim of the present invention.
Claims (10)
1. automobile sensor checkout equipment; Comprise working plate; It is characterized in that, also comprise several roads kinematic train of being installed on the working plate, clamping workpiece mechanism, detect air gap adjusting and testing agency, signal system, be located at control system, data acquisition system (DAS) in the working plate, reach Signal Analysis System; Include the signal wheel in the said signal system, reach probe power, include capture card in the data acquisition system (DAS), reach current sensor; Control system is used for test process is moved control; During test; Sensor to be measured is installed on the working plate through clamping workpiece mechanism; Probe power is this sensor power supply to be measured, and this sensor to be measured is crankshaft position sensor, abs sensor, CMPS Camshaft Position Sensor or vehicle speed sensor; Air gap is regulated and the mounting distance between sensor to be measured and the signal wheel is detected and adjusted in testing agency through detecting; When kinematic train drives the rotation of signal wheel; Sensor to be measured produces signal output; Capture card is gathered the signal of this signal output and current sensor, and is sent to Signal Analysis System analysis.
2. automobile sensor checkout equipment as claimed in claim 1; It is characterized in that; Include bearing seat, transmission shaft, motor in the kinematic train of said several roads and be installed on bearing seat and motor between shaft coupling; Said signal wheel is installed on the transmission shaft, and this signal wheel is through a signal wheel fast assembly and disassembly mechanism and transmission shaft dismounting mutually.
3. automobile sensor checkout equipment as claimed in claim 1 is characterized in that, said clamping workpiece mechanism includes the sensor mount pad, be located at replaceable clamping workpiece frock on the sensor mount pad, and clamping cylinder.
4. automobile sensor checkout equipment as claimed in claim 1; It is characterized in that; Include the air gap detecting sensor in said detection air gap adjusting and the testing agency, reach in order to the milscale of conditioning signal wheel with sensor distance to be measured, this air gap detecting sensor is a distance detecting laser instrument.
5. automobile sensor checkout equipment as claimed in claim 1; It is characterized in that; Said control system is a PLC control system or a single-chip computer control system, this PLC control system or single-chip computer control system respectively with kinematic train, detect the air gap adjusting with testing agency, reach Signal Analysis System and electrically get in touch.
6. automobile sensor checkout equipment as claimed in claim 1; It is characterized in that; Also comprise a sensor signal connecting interface, this sensor signal connecting interface one side electrically is connected with sensor to be measured, opposite side respectively with probe power, and data acquisition system (DAS) electrically connect.
7. automobile sensor checkout equipment as claimed in claim 1; It is characterized in that; Include host computer in the said Signal Analysis System, this host computer stored is useful on analytic curve shaft position sensor, abs sensor, CMPS Camshaft Position Sensor, reaches the respective algorithms of vehicle speed sensor output signal characteristic.
8. a method of utilizing automobile sensor checkout equipment detecting sensor performance in the claim 1 is characterized in that, comprises the steps:
Sensor to be measured is installed on the automobile sensor checkout equipment through clamping workpiece mechanism, starts test, this sensor to be measured is crankshaft position sensor, abs sensor, CMPS Camshaft Position Sensor or vehicle speed sensor;
Select sensor type to be measured, parameter is set, begin this sensor to be measured is tested when Pretesting;
Control system is controlled rotating speed of motor, treat that motor speed is stable after, Signal Analysis System reads the signal of capture card;
Signal Analysis System carries out data processing to signal, and preserves test result automatically;
Judge whether to proceed test, if then carry out the next round test; If not, then log off.
9. the method for utilizing automobile sensor checkout equipment detecting sensor performance as claimed in claim 8 is characterized in that, the said step that parameter is set comprises: judge whether to revise parameter, if not, then directly begin this sensor to be measured is tested; If, then carry out parameter modification, deletion, reach and preserve operation, begin then this sensor to be measured is tested; In the parameter modification operation, according to the different sensor type, the test judgement condition is set, after selecting preservation, open program next time, under the condition that does not change the sensor type selection, test later on is same decision condition.
10. the method for utilizing automobile sensor checkout equipment detecting sensor performance as claimed in claim 8; It is characterized in that; Said Signal Analysis System reads in the signals step of capture card; The capture card signal that reads comprises the current signal and the output voltage signal of current sensor to be measured; Signal Analysis System carries out data processing to this output voltage signal, and this data processing comprises phase place judgement, peak-to-peak value, high level, low level, rise time, fall time, conducting electrical angle, signal symmetry degree, reaches curve display.
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| CN103954801A (en) * | 2014-05-19 | 2014-07-30 | 无锡隆盛科技股份有限公司 | Measuring device of rotating speed sensor |
| CN104006782A (en) * | 2014-06-12 | 2014-08-27 | 北京华电天仁电力控制技术有限公司 | Dynamic detection device for position sensor sensing section |
| CN104614005A (en) * | 2015-02-16 | 2015-05-13 | 爱德森（厦门）电子有限公司 | Electromagnetic sensor response time and resolution detection device and method |
| CN105043432A (en) * | 2015-08-18 | 2015-11-11 | 安徽日正新源电气技术有限公司 | Method for detecting camshaft phase sensor |
| CN105277743A (en) * | 2015-11-13 | 2016-01-27 | 桂林电子科技大学 | Pulse type engine rotating speed measuring instrument full-automatic detection device and method |
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| CN103954801A (en) * | 2014-05-19 | 2014-07-30 | 无锡隆盛科技股份有限公司 | Measuring device of rotating speed sensor |
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| CN105277743A (en) * | 2015-11-13 | 2016-01-27 | 桂林电子科技大学 | Pulse type engine rotating speed measuring instrument full-automatic detection device and method |
| CN106896240A (en) * | 2015-12-17 | 2017-06-27 | 大陆汽车电子(长春)有限公司 | A kind of automotive speed sensor test experimental bed and its method of testing |
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| CN109374035A (en) * | 2018-12-05 | 2019-02-22 | 贝兹维仪器(苏州)有限公司 | A kind of sensor detector with vibration rotation function |
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