CN108627191A - Position sensor automatic detection device and detection method - Google Patents
Position sensor automatic detection device and detection method Download PDFInfo
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- CN108627191A CN108627191A CN201810739247.3A CN201810739247A CN108627191A CN 108627191 A CN108627191 A CN 108627191A CN 201810739247 A CN201810739247 A CN 201810739247A CN 108627191 A CN108627191 A CN 108627191A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
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Abstract
A kind of position sensor automatic detection device and detection method.Since vehicle position sensor output signal is related with sensor performance and installation site, in order to test bent axle and camshaft-signal sensor, examines whether bent axle, camshaft meet the requirements, devise sensor automatic detection device.The present invention forms：Data collecting system and mechanical device, data collecting system include acquisition and control system（4）, acquisition and control system passes through CAN bus（3）With CAN analyzers（2）Connection, CAN analyzers pass through USB interface and computer（1）Connection, mechanical device includes servo motor（6）, servo motor by the axis in shaft coupling successively with holder（19）Internal gear B（18）, gear A（17）, code-disc B（16）, code-disc A（15）Connection, axis pass through bearing（14）With shaft coupling（11）It is connected, shaft coupling passes through connecting shaft and encoder（12）Connection.The present invention is used for position sensor automatic detection device.
Description
Technical field：
The present invention relates to a kind of position sensor automatic detection device and detection methods.
Background technology：
With being constantly progressive for automotive electronic technology, automotive circuit diagram degree is also higher and higher, as Auto Electronic Controlled System
Information source, automobile sensor become the indispensable important component of Auto Electronic Controlled System, it may be said that sensing vehicle
The quality of device directly affects the performance of entire automotive control system, and vehicle position sensor is mounted in automobile engine crankshaft
It is most important sensor in engine management system with the sensor on camshaft, thereby, it is ensured that vehicle position sensor
Validity is very necessary.
Since automotive field is higher and higher to the igniting of engine and oil spout performance requirement, within the engine, crank position
The accuracy of sensor and CMPS Camshaft Position Sensor directly affects fuel economy, and the function of crankshaft position sensor is acquisition
Crank rotation angle, and electronic control unit is inputted, determine ignition timing and injection timing, the effect of CMPS Camshaft Position Sensor
It is the position signal for acquiring distribution cam axle, judges the compression top center of cylinder, carries out sequential fuel injection control and ignition control, because
This, acquires in real time and accurately and analyzes crank position and camshaft-position signal, has to the control system of engine important
It influences, is of great significance to the power performance and the economy performance of engine.
Since vehicle position sensor output signal is related with sensor performance and installation site, in order to bent axle and cam
Axle sensor is tested, and to examine whether bent axle, camshaft meet production requirement, is badly in need of a kind of position sensor of design certainly
Motion detection device.
Invention content：
The object of the present invention is to provide a kind of position sensor automatic detection device and detection method based on bus marco, use
Automatic control mode, the functional test specifically for automobile crane position sensor and CMPS Camshaft Position Sensor are required and are developed
's.
Above-mentioned purpose is realized by following technical scheme：
A kind of position sensor automatic detection device, composition include：Data collecting system and mechanical device, it is characterized in that：Institute
The data collecting system stated includes acquisition and control system, the acquisition and control system by CAN bus with
CAN analyzers connect, and the CAN analyzers are connect by USB interface with computer, and the mechanical device includes servo electricity
Machine, the servo motor are connect with the gear B of internal stent, gear A, code-disc B, code-disc A successively by the axis in shaft coupling,
The axis is connected across bearing with shaft coupling, and the shaft coupling is connect by connecting shaft with encoder.
The position sensor automatic detection device is fixed with normal place sensors A, measured position on the holder
Sensors A, normal place sensor B, measured position sensor B are set, gear is installed below the normal place sensors A
B, the measured position sensors A lower section are equipped with the gear A, the normal place sensor B and the code
Disk B connections, the measured position sensor B are connect with the code-disc A.
The position sensor automatic detection device, the computer, the CAN analyzers, the data
Acquisition is sequentially fixed at control system, the servo motor, the holder, the encoder, oscillograph on base frame.
A kind of position sensor automatic detection device and detection method, this method comprises the following steps：Whole detection device
It is made of data collecting system and mechanical device two parts, crankshaft position sensor presses its electric signal with CMPS Camshaft Position Sensor
Mechanism of production is different, can be divided into magneto-electric, Hall-type and photoelectric sensor, magneto-electric and hall sensor can pass through gear
Rotation induces signal, and photoelectric sensor need to coordinate code-disc just to can be used, which can complete to above-mentioned three type
The detection of type position sensor；
Detection device mechanical part drives in-line gears and code-disc to rotate simulated engine working condition, and mould by servo motor
Quasi- sensor actual installation situation, by normal place sensor, measured position sensor and corresponding gear and code-disc same-phase
It is fixed on holder, by oscillograph observation caliber sensor output signal and tested sensor output signal, in rotary shaft
End coaxially be connected 16 absolute position encoders, the absolute position of gear and code-disc is detected, data acquisition
System, by the acquisition to sensor output signal and code device signal, carries out signal processing and meter based on mechanical device
It calculates, whether automatic decision sensor reaches requirement, while showing and storing test data；
Data collecting system can acquire the output signal of magneto-electric, Hall-type and photoelectric sensor, acquisition magneto-electric sensing
When device signal, need to constitute double limiting circuit using operational amplifier, when avoiding the high rotating speed of gear, magnetoelectric sensor signal
Amplitude is excessive to cause microcontroller to damage, while the sinusoidal signal that magnetoelectric sensor exports is changed into standard using shaping circuit
Pulse signal.The output of Hall-type and photoelectric sensor is pulse signal, can be directly accessed different disposal module and complete accordingly
Parameter calculates.According to absolute position encoder signal, it may be determined that the phase of gear or code-disc；According to sensor and gear, code
The installation gap of disk, the relationship of setting angle and rotating speed, it can be determined that influence the factor of sensor output signal；According to standard
Position sensor and the comparison of measured position sensor position signal, it can be determined that the working performance of sensor.
Programmed environment uses monitor and control system software, and microcontroller receives the instruction from TT＆C system by CAN bus, and leads to
The operation for crossing the corresponding interface control detection device, realizes multiple signals high speed synchronous sample and human-computer interaction, monitor and control system software
Corresponding control instruction is sent to foreground controller based on event structure, and aobvious with user management, parameter setting, waveform dynamic
Show, parameters number is shown, wave-shape amplitude is adjusted, the adjusting of figure markers, data dynamic playback, data analysis, fault alarm it is aobvious
Show function；
System uses CAN communication mode, and CAN analyzers are connected by USB interface with computer, it can be achieved that bus bi-directional data passes
It is defeated, the instruction of TT＆C system can be received, while collected data can be uploaded to TT＆C system, and on interface in real time
It has been shown that, microcontroller can instruct according to TT＆C system and export corresponding pulse signal control servomotor rotating speed, and by absolute
The feedback signal of position coder realizes the accurate closed-loop control of speed, switches number according to magneto-electric, Hall-type and photo-electric signal
According to treatment channel, alarmed according to detection data triggering sound, light.
Advantageous effect：
1. the position sensor automatic detection device that the present invention designs is mainly for crankshaft position sensor and cam
Shaft position sensor, but it is not limited to above two sensor, sensor signal mechanism of production angle is said, magnetoelectricity is suitable for
Formula, Hall-type and photoelectric sensor.Universal support can meet the installation requirement of a variety of gears, code-disc and sensor, can
Realize the accurate adjustment of sensor and gear and code-disc gap, deflection angle and axial position；Traditional sensor detecting device,
Standard signal is the standard block signal corresponding to bent axle and camshaft signal backlash edge generated by photoelectric sensor,
Its standard signal of the present apparatus is by being generated with the standard transducer of tested sensor same type, and standard signal is more accurate,
Test data is closer practical.
The detection device of the present invention can complete output waveform phase accuracy and be detected with repeatability precision, output waveform height,
Low level amplitude；The double limiter comparators of high speed can be utilized to complete the detection of output waveform rise and fall time.
Description of the drawings：
Attached drawing 1 is the structural schematic diagram of the present invention.
Attached drawing 2 is the structure diagram of the data collecting system of the application.
Attached drawing 3 is decaying and the sizing die block diagram of the application.
Specific implementation mode：
Embodiment 1：
A kind of position sensor automatic detection device, composition include：Data collecting system and mechanical device, it is characterized in that：Institute
The data collecting system stated includes acquisition and control system 4, and the acquisition and control system passes through CAN bus 3
It is connect with CAN analyzers 2, the CAN analyzers are connect by USB interface with computer 1, and the mechanical device includes watching
Take motor 6, the servo motor by the axis in shaft coupling successively with the gear B inside holder 19, gear A, code-disc B, code
Disk A connections, the axis are connected across bearing 14 with shaft coupling 11, and the shaft coupling is connect by connecting shaft with encoder.
Embodiment 2：
According to position sensor automatic detection device described in embodiment 1, normal place sensor is fixed on the holder
A, measured position sensors A, normal place sensor B, measured position sensor B, the normal place sensors A lower section peace
Equipped with gear B, the gear A is installed below the described measured position sensors A, the normal place sensor B with
The code-disc B connections, the measured position sensor B are connect with the code-disc A.
Embodiment 3：
It is the computer, the CAN analyzers, described according to position sensor automatic detection device described in embodiment 1
Acquisition and control system, the servo motor, the holder, the encoder, oscillograph be sequentially fixed at
On base frame.
Embodiment 4：
A kind of detection method using the position sensor automatic detection device described in embodiment 1-3, this method are：Whole detection
Device is made of data collecting system and mechanical device two parts, includes mainly：Computer (TT＆C system), CAN analyzers, number
According to acquisition with control system (including microcontroller constituted data collecting system, power supply, servomotor controller), servo electricity
The parts groups such as machine, normal place sensor, measured position sensor, gear, code-disc, absolute position encoder, oscillograph, base frame
At；Crankshaft position sensor is different by its electric signal mechanism of production from CMPS Camshaft Position Sensor, can be divided into magneto-electric, Hall-type
And photoelectric sensor, magneto-electric and hall sensor can be rotated by gear and induce signal, photoelectric sensor need to match
It closes code-disc just to can be used, which can complete the detection to above-mentioned three types position sensor；
Detection device mechanical part drives in-line gears and code-disc to rotate simulated engine working condition, and mould by servo motor
Quasi- sensor actual installation situation, by normal place sensor, measured position sensor and corresponding gear and code-disc same-phase
It is fixed on holder, by oscillograph observation caliber sensor output signal and tested sensor output signal, in rotary shaft
End coaxially be connected 16 absolute position encoders, the absolute position of gear and code-disc is detected, data acquisition
System, by the acquisition to sensor output signal and code device signal, carries out signal processing and meter based on mechanical device
It calculates, whether automatic decision sensor reaches requirement, while showing and storing test data；
Data collecting system can acquire the output signal of magneto-electric, Hall-type and photoelectric sensor, acquisition magneto-electric sensing
When device signal, need to constitute double limiting circuit using operational amplifier, when avoiding the high rotating speed of gear, magnetoelectric sensor signal
Amplitude is excessive to cause microcontroller to damage, while the sinusoidal signal that magnetoelectric sensor exports is changed into standard using shaping circuit
Pulse signal.The output of Hall-type and photoelectric sensor is pulse signal, can be directly accessed different disposal module and complete accordingly
Parameter calculates.According to absolute position encoder signal, it may be determined that the phase of gear or code-disc；According to sensor and gear, code
The installation gap of disk, the relationship of setting angle and rotating speed, it can be determined that influence the factor of sensor output signal；According to standard
Position sensor and the comparison of measured position sensor position signal, it can be determined that the working performance of sensor.
Programmed environment uses monitor and control system software, and microcontroller receives the instruction from TT＆C system by CAN bus, and leads to
The operation for crossing the corresponding interface control detection device, realizes multiple signals high speed synchronous sample and human-computer interaction, monitor and control system software
Corresponding control instruction is sent to foreground controller based on event structure, and aobvious with user management, parameter setting, waveform dynamic
Show, parameters number is shown, wave-shape amplitude is adjusted, the adjusting of figure markers, data dynamic playback, data analysis, fault alarm it is aobvious
Show function；
System uses CAN communication mode, and CAN analyzers are connected by USB interface with computer, it can be achieved that bus bi-directional data passes
It is defeated, the instruction of TT＆C system can be received, while collected data can be uploaded to TT＆C system, and on interface in real time
It has been shown that, microcontroller can instruct according to TT＆C system and export corresponding pulse signal control servomotor rotating speed, and by absolute
The feedback signal of position coder realizes the accurate closed-loop control of speed, switches number according to magneto-electric, Hall-type and photo-electric signal
According to treatment channel, alarmed according to detection data triggering sound, light；
The application is the position sensor automatic detection device based on bus marco,, will be by when test using automatic control mode
It surveys sensor to be fixed on holder, after detection function is opened, servo motor will be risen to the ladder speed of 200r/min by 0
6000r/min keeps 5s invariablenes turning speeds in each test node, and within this time, data collecting system is completed to measured signal
Calculating, upload and judge the junction sensor performance；
It is Platform Designing host computer interface using virtual instrument of LabVIEW, detection device is mainly completed following specific
Task：Show that gear is arranged by the cooperation of mechanical device in sensor output waveform, gear, the setting of code-disc rotating speed in software
With the initial position (zero) of code-disc, the form of gear tooth that different engines use is different, and what the number of teeth was most at present is 36 teeth (36
Decile lacks two teeth), minimum 1 tooth, therefore may be selected which tooth edge or integrated testability individually tested, software has permission
Setting, can set different administrator rights, and the test index for needing to preserve can be arranged, and setting data retention over time preserves
Format, tester's work number, examine batch number, can by date, batch inquiry；It can be manually entered angle value, test sensor
The position relationship of output signal and this angle；Data sampling time can be set, show the maximum of test data, minimum value, be averaged
Value, can be arranged product acceptance criteria value；With sound, light warning function when batch detection product.
For induction type, Hall-type and photoelectric sensor, output signal is different, and processing method is also different；Induction
Formula sensor, output are sinusoidal signal, need to can be just received by the system through overdamping, Shaping Module, and decaying and Shaping Module are such as
Shown in lower attached drawing 3.
For original signal input terminal, two voltage-stabiliser tube differential concatenations constitute double limiting circuit, voltage stabilizing with operational amplifier
Pipe is in parallel with negative feedback resistor, and when Ui is smaller, amplifier output voltage is smaller, and voltage-stabiliser tube does not have breakdown, amplifier at this time
Output voltage changes with Ui；When Ui increases to voltage-stabiliser tube breakdown voltage, voltage-stabiliser tube breakdown, output voltage remains unchanged, circuit
Into clipping operation state.Capacitance-resistance filter is then carried out, then sinusoidal signal can be changed into pulse signal by comparing device, most
Data are uploaded to TT＆C system after microcontroller calculates afterwards.TT＆C system can be to standard transducer and tested sensor
Phase is compared, and can export quality to signal by oscillograph and be disturbed situation and be observed.
Hall-type and photoelectric sensor, since its output is pulse signal, major parameter detection method is：
1. output waveform phase accuracy and repeatability precision
Phase accuracy is the error of sensor output signal (rising edge and failing edge) and gear teeth edge physical location.Repeat essence
Degree is the error of sensor itself output signal position when identical product turns over gear every time.The two calculation formula is identical.
According to systematic error calculation formula, when the amount of required acquisition has including motor speed n, delay
Between td;
Motor speed n：It is measured by absolute value optoelectronic encoding device, specific method is the interrupt function using general purpose timer, timing
Enter after 1ms and interrupt, 16 output valves of record absolute value optoelectronic encoding device at this time go out after interrupting after timing 1ms again under entering
It is primary to interrupt, the output valve of this moment encoder is read, position calculates motor speed twice using this.
Delay time td：The difference between the rising edge or failing edge of waveform is detected for reference waveform and real sensor
Value；Reference waveform obtains the numerical value that the corresponding absolute value encoder output in all edges of gear can be recorded by mechanical means,
The positional value of these numerical value, that is, reference waveform rising edge and failing edge；The output waveform of tested sensor can utilize catching for microcontroller
Obtain the rising edge and failing edge of function acquisition waveform；The difference of standard value and tested waveform is calculated using timer.
The output waveform rise and fall time
The signal rise and fall time refers to output signal amplitude from the time needed for the 10% to 90% of end value, signal rise with
Fall time is Microsecond grade, data collecting system can not direct measuring signal the rise and fall time, need to utilize at high speed
Circuit is managed, the pulse signal of measurable same time width is transformed into.With high-speed comparator to rising edge and failing edge into
Row acquisition, window bound reference voltage are 0.5v and 4.5v, and the part of rising edge voltage between the windows will convert into pulse
The high level of signal is acquired the rising edge and failing edge of this pulse signal using the capturing function of microcontroller, and calculates
Pulse width, and then the output signal rise and fall time is obtained, high-speed processing circuits are as shown in Fig. 4.
UH is upper limit voltage (4.5v) in attached drawing 4, and UL is lower voltage limit (0.5v), and Ui is input voltage； Ui>UH or Ui<
When UL, comparator A1 or A2 export high level, and triode saturation conduction exports U0≈0V；Work as UL<Ui<When UH, comparator A1 and
A2 exports low level, triode cut-off, output U0 ≈ 5V.Two-way clamp diode in circuit added by the input terminal of A1, A2,
It shields.
The high and low level magnitude of output waveform
The high and low level magnitude of output signal is read out using analog/digital (AD) conversion function of microcontroller, to sentence
Whether disconnected output voltage reaches requirement.
Claims (4)
1. a kind of position sensor automatic detection device, composition include：Data collecting system and mechanical device, it is characterized in that：
The data collecting system includes acquisition and control system, and the acquisition and control system passes through CAN bus
It is connect with CAN analyzers, the CAN analyzers are connect by USB interface with computer, and the mechanical device includes servo
Motor, the servo motor are connected with the gear B of internal stent, gear A, code-disc B, code-disc A successively by the axis in shaft coupling
It connects, the axis is connected across bearing with shaft coupling, and the shaft coupling is connect by connecting shaft with encoder.
2. position sensor automatic detection device according to claim 1, it is characterized in that：Mark is fixed on the holder
Level sets sensors A, measured position sensors A, normal place sensor B, measured position sensor B, the normal place
Gear B is installed below sensors A, the gear A, the standard are installed below the measured position sensors A
Position sensor B is connect with the code-disc B, and the measured position sensor B is connect with the code-disc A.
3. position sensor automatic detection device according to claim 1, it is characterized in that：It is the computer, described
CAN analyzers, the servo motor, the holder, the encoder, show the acquisition and control system
Wave device is sequentially fixed on base frame.
4. a kind of detection method using the position sensor automatic detection device described in one of claim 1-3, it is characterized in that：
This method comprises the following steps：
Whole detection device is made of data collecting system and mechanical device two parts, crankshaft position sensor and camshaft location
Sensor is different by its electric signal mechanism of production, can be divided into magneto-electric, Hall-type and photoelectric sensor, magneto-electric and Hall-type
Sensor can be rotated by gear and induce signal, and photoelectric sensor need to coordinate code-disc just usable, which can be with
Complete the detection to above-mentioned three types position sensor；
Detection device mechanical part drives in-line gears and code-disc to rotate simulated engine working condition, and mould by servo motor
Quasi- sensor actual installation situation, by normal place sensor, measured position sensor and corresponding gear and code-disc same-phase
It is fixed on holder, by oscillograph observation caliber sensor output signal and tested sensor output signal, in rotary shaft
End coaxially be connected 16 absolute position encoders, the absolute position of gear and code-disc is detected, data acquisition
System, by the acquisition to sensor output signal and code device signal, carries out signal processing and meter based on mechanical device
It calculates, whether automatic decision sensor reaches requirement, while showing and storing test data；
Data collecting system can acquire the output signal of magneto-electric, Hall-type and photoelectric sensor, acquisition magneto-electric sensing
When device signal, need to constitute double limiting circuit using operational amplifier, when avoiding the high rotating speed of gear, magnetoelectric sensor signal
Amplitude is excessive to cause microcontroller to damage, while the sinusoidal signal that magnetoelectric sensor exports is changed into standard using shaping circuit
Pulse signal.The output of Hall-type and photoelectric sensor is pulse signal, can be directly accessed different disposal module and complete accordingly
Parameter calculates.According to absolute position encoder signal, it may be determined that the phase of gear or code-disc；According to sensor and gear, code
The installation gap of disk, the relationship of setting angle and rotating speed, it can be determined that influence the factor of sensor output signal；According to standard
Position sensor and the comparison of measured position sensor position signal, it can be determined that the working performance of sensor.
LabVIEW programmed environments use monitor and control system software, microcontroller to receive the instruction from TT＆C system by CAN bus,
And the operation of detection device is controlled by the corresponding interface, realize multiple signals high speed synchronous sample and human-computer interaction, TT＆C system
Software is based on event structure and sends corresponding control instruction to foreground controller, and dynamic with user management, parameter setting, waveform
State is shown, parameters number is shown, wave-shape amplitude is adjusted, the adjusting of figure markers, data dynamic playback, data analysis, fault alarm
Display function；
System uses CAN communication mode, and CAN analyzers are connected by USB interface with computer, it can be achieved that bus bi-directional data passes
It is defeated, the instruction of TT＆C system can be received, while collected data can be uploaded to TT＆C system, and on interface in real time
It has been shown that, microcontroller can instruct according to TT＆C system and export corresponding pulse signal control servomotor rotating speed, and by absolute
The feedback signal of position coder realizes the accurate closed-loop control of speed, switches number according to magneto-electric, Hall-type and photo-electric signal
According to treatment channel, alarmed according to detection data triggering sound, light.
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| CN201810739247.3A CN108627191A (en) | 2018-07-06 | 2018-07-06 | Position sensor automatic detection device and detection method |
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