CN105509773B - position sensor and system and position sensor and system for clutch master cylinder - Google Patents
position sensor and system and position sensor and system for clutch master cylinder Download PDFInfo
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- CN105509773B CN105509773B CN201410504564.9A CN201410504564A CN105509773B CN 105509773 B CN105509773 B CN 105509773B CN 201410504564 A CN201410504564 A CN 201410504564A CN 105509773 B CN105509773 B CN 105509773B
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Abstract
A kind of clutch plunger position sensor and system, for sensing and generate clutch plunger in cylinder top position signal, movement position signal and cylinder bottom position signal, including：Detection circuit, for sensing clutch plunger in cylinder top position, movement position and cylinder bottom position；Self-checking circuit, cylinder top position signal, movement position signal and cylinder bottom position signal for being sensed to the detection circuit carry out self-test；Diagnostic circuit, for carrying out fault diagnosis to the detection circuit.The present invention senses the movement of piston using detection circuit and obtains position signal, carries out signal and compares self-test by self-checking circuit, to judge whether clutch plunger top position signal, position motor message and bottom position signal mistake occur；Clutch plunger is individually sensed in cylinder bottom position using diagnosis and detection circuit simultaneously, and is compared in cylinder bottom position with the piston that detection circuit detects, judges whether that mistake occurs, to achieve the purpose that self diagnosis.
Description
Technical field
The present invention relates to position sensing apparatus, more particularly relate to generate monitoring letter according to the clutch position sensed
Number device.
Background technology
In present automobile control technology, need to sense automobile engine clutch position, and generate clutch position
Signal.Clutch position signal can be by being mounted on clutch master cylinder (Clutch Master Cylinder or CMC) at present
Sensor-based system generates.For example, stepping on clutch pedal, the existing sensor-based system on clutch master cylinder can produce
Raw at least two signals, i.e.,：Clutch top position signal and clutch bottom portion position signal.Clutch top position signal table
Show that clutch will or just be stepped on (that is, clutch friction plate will or be just gradually released；At this point, gear-box and hair
Motivation is also in meshing state), control unit of engine (ECU) prepares to start the engine of automobile.Clutch bottom position confidence
Number then indicating clutch is stepped on, (clutch friction plate is in disengaged position to bottom position；At this point, gear-box and engine have been located
In discrete state), control unit of engine can start the engine of automobile or realize shift.In addition, existing sensing system
System can also generate clutch motor message, indicate to move back and forth state and position between clutch is in bottom and top.
But clutch top position signal, the clutch position that current clutch plunger device can only provide move
Three signals of signal and clutch bottom portion position signal, but cannot be to self detection of the accurately progress of signal and to detection electricity
Road carries out self diagnosis, cannot meet the control requirement of high-performing car.
Invention content
An object of the present invention is to propose a kind of clutch plunger position sensor with self-test and self diagnosis ability
And system, to meet the higher requirement of automotive control system and needs.
In order to reach object above, the present invention provides a kind of generation clutch position with self-test and self-diagnosing function
The sensor of signal, specially：
A kind of clutch plunger position sensor, for sensing and generating clutch plunger in cylinder top position signal, movement
Position signal and cylinder bottom position signal, including：
Detection circuit, the signal generated on the move for sensing clutch plunger, the signal include corresponding clutch
Piston is in cylinder top position, the signal of movement position and cylinder bottom position；
Self-checking circuit, the signal for being sensed to the detection circuit carry out self-test, to judge clutch plunger cylinder
Whether top position signal, movement position signal and cylinder bottom position signal there is mistake；
Diagnostic module, for carrying out fault diagnosis to the detection circuit；
The diagnostic module sensing clutch plunger in cylinder bottom position and exports cylinder bottom position diagnostic signal；And
Cylinder bottom position diagnostic signal is compared the diagnostic module with the cylinder bottom position signal, judges whether
Diagnostic signal whether mistake occurs, and exports the clutch plunger position sensor abnormal state.
In order to reach object above, the present invention provides a kind of generation clutch position with self-test and self-diagnosing function
The sensing system of signal, specially：
A kind of clutch plunger position sensing system, for generating clutch plunger in cylinder top position signal, movement position
Signal and cylinder bottom position signal, including：
Clutch plunger cylinder；Including clutch plunger cylinder body and clutch plunger bar, clutch plunger bar can be in clutch
It is moved back and forth in piston/cylinder；
Magnet arrangement, the magnet arrangement are installed on clutch plunger bar, and with the round-trip of clutch plunger bar
And it moves back and forth；And：
Clutch plunger position sensor as the aforementioned, the relatively described magnet arrangement of clutch plunger position sensor
It moves back and forth.
The invention also discloses a kind of object of which movement sensing sensors.Specially：
A kind of position sensor, for sensing and generating testee in initial position signal, centre position signal and most
Whole position signal, including：
Detecting element, the signal generated on the move for sensing testee, the signal include initial position, centre
The signal of position and final position；
Self-checking circuit, the signal for being sensed to the detecting element carry out self-test；
Diagnostic circuit, for carrying out fault diagnosis to the detection circuit.
The invention also discloses a kind of position sensing systems, specially：
A kind of position sensing system, for sense and generate testee initial position signal, centre position signal and
Final position signal, including：
Position sensor as described in aforementioned；And
Magnet arrangement, the magnet arrangement are installed on testee, and with the relatively described position sensor of testee
It is moved back and forth.
The present invention senses the movement of piston using detection circuit and obtains position signal, carries out signal and passes through self-checking circuit
Self-test is compared, to judge whether clutch plunger top position signal, position motor message and bottom position signal mistake occur
Accidentally；Clutch plunger is sensed in cylinder bottom position using diagnostic circuit simultaneously, and the piston detected with detection circuit is in cylinder bottom position
It sets and is compared, judge whether that mistake, diagnostic signal whether output position sensor states are abnormal, to reach self occurs
The purpose of diagnosis.
Description of the drawings
Fig. 1 is the partial schematic sectional view of clutch main piston device；
Fig. 2 indicates sensing device circuit functional block diagram of the present invention；
Fig. 3 shows one embodiment block diagram of the first processing unit concrete structure；
Fig. 4 shows one embodiment block diagram of second processing device concrete structure；
Fig. 5 indicates defeated to the cosine-shaped voltage for handling the first hall sensing unit senses by processor in the first processing unit
Go out the Linear voltage output for being handled and being generated with sinusoidal-shaped voltage output.
Specific implementation mode
The various specific implementation modes of the present invention are described below with reference to the attached drawing for constituting this specification part.
Although it should be understood that be used in the present invention indicate direction term, such as "front", "rear", "upper", "lower", " left side ",
The various example features and element of the description such as " right side " present invention, but use these terms merely for convenience of description herein
Purpose, the determination based on the example orientations shown in attached drawing.Since disclosed embodiment of this invention can be according to difference
Direction setting, so these indicate directions term be intended only as illustrate and should not be considered as limiting.In the conceived case,
The identical or similar reference numeral used in the present invention refers to identical component.
Fig. 1 be clutch main piston device 106 partial schematic sectional view, show the internal structure of piston/cylinder 108 with
And the signal matching relationship of clutch plunger bar 109 and piston/cylinder 108.As shown in Figure 1, clutch main piston device 106 wraps
Include piston/cylinder 108.There is cavity 161, piston rod 109 are stretched into piston/cylinder 108 in piston/cylinder cavity 161, it can be in work
It moves linearly back and forth in plug cylinder body cavity 161.For example, the proximal end 109a of piston rod 109 is by clutch pedal (not shown) institute
Driving, stepping on and decontroling with clutch pedal, piston rod 109 makees straight reciprocating motion.On the distal end 109b of piston rod 109
It is provided with magnet arrangement 166 (can be annular magnet such as around piston rod 109 as one embodiment magnet 166), and
The magnet arrangement 166 is suitable for reciprocating in piston/cylinder 108 with the linear movement of piston rod 109.In such as Fig. 1 institutes
In the embodiment shown, magnet arrangement 166 is done with piston rod 109 between cylinder top position (positions S2) and cylinder bottom position (positions S3)
It moves back and forth.Although not shown in the drawings, magnet arrangement 166 can be also arranged mounted on the axial other positions of piston rod 109.Due to
The proximal end 109a of piston rod 109 is driven by clutch pedal, so corresponding position of the magnet arrangement 166 in piston cylinder 104
The operating position for reflecting clutch pedal, to reflect the corresponding operating position of clutch.
In Fig. 1, the magnet arrangement 166 on piston rod 109 moves in the cavity 161 of piston/cylinder 108, can
Mobile total distance is L1+L2.What the displacement distance L1 between wherein S1 to S2 indicated clutch moves freely stroke, i.e. clutch
The movement of device applies separating force to clutch friction plate not yet.When magnet arrangement 166 has arrived at S2, clutch is in and is stepped on
To just departing from free state, i.e., separating force just is applied to clutch friction plate, at this moment magnet arrangement 166 is in cylinder top position
It sets (positions S2).Stroke L2 expressions from S2 to S3 gradually apply separating force to clutch friction plate, until clutch friction plate
It is kept completely separate, at this moment magnet arrangement 166 is in cylinder bottom position (positions S3).
Clutch main piston device 106 is provided with sensing device further 200 on 108 outer wall of piston/cylinder.Sensing device further 200 can
It is fixed in several ways on piston/cylinder 108.For example, sensing device further 200 is to be mounted on piston cylinder by mounting bracket 110
On 108 outer wall of body.In the embodiment shown in fig. 1, sensing device further 200 corresponds to magnetic in the axial position of piston/cylinder 108
The region that iron device 166 moves back and forth between cylinder top position (positions S2) and cylinder bottom position (positions S3).When magnet arrangement 166
When any position between cylinder bottom position and cylinder top position, the detection circuit sensing magnet arrangement 166 in sensing device further 200 produces
Raw magnetic field (or magnetic flux).
In operating process, when magnet arrangement 166 is as piston rod 109 is in the top position S2 of piston/cylinder 108 and bottom
When being moved between the S3 of position, respective change occurs for the magnetic field (or magnetic flux) that magnet arrangement 166 generates at sensing device further 200.If
Set the magnetic field (or magnetic flux) that detection circuit in the sensing device further 200 on 108 outer wall of piston master cylinder senses magnet arrangement 166
Variation picks up corresponding data to generate the signal for being used to indicate clutch position in specific time.One in the present invention is excellent
It selects in embodiment, the signal of instruction clutch position caused by sensing device further 200 includes：Clutch top position signal CTS
(being generated when magnet arrangement 166 is moved in piston/cylinder 108 at S2), clutch bottom portion position signal CBS (work as magnet arrangement
166 be moved in piston/cylinder 108 at S3 generate) and motor message EPB (when magnet arrangement 166 is at piston/cylinder 108
It is generated between position S2 and position S3).Clutch top position signal CTS indicate clutch be in stepped on to departing from
Free state, magnet arrangement 166 have arrived the cylinder body top position for just applying separating force to clutch friction plate, but clutch at this time
Device friction plate is in abutment location, and gear-box and engine are in meshing state.Clutch bottom portion position signal CBS then indicates magnetic
Iron device 166 has arrived cylinder base position, and (that is, clutch friction plate is in disengaged position, gear-box and engine divide completely
From).Motor message EPB indicates that magnet arrangement 166 be between position S2 and position S3, and clutch friction plate is in from being engaged to
The transition state of separation.
Fig. 2 indicates 200 structure diagram of sensing device further of the present invention.In an embodiment as illustrated in figure 2, sensing device further 200 is wrapped
Include the first detection circuit (main detection circuit), the second detection circuit (auxiliary detection circuit) and third detection circuit.According to the present invention
A preferred embodiment in, the detection circuit in sensing device further 200 includes multiple hall sensing units.Show in as shown in Figure 2
In example, the first hall sensing unit 301, the second hall sensing unit 302 and third hall sensing unit 303 are corresponding respectively to be sensed
The first detection circuit, the second detection circuit in device 200 and third detection circuit, and form corresponding detection circuit.This is more
A hall sensing unit is arranged and operates independently of each other.For example, the first hall sensing unit 301, the second hall sensing unit 302
With 303 independent work of third hall sensing unit, sense respectively magnetic flux density that magnet arrangement 166 is generated in different location with/
Or magnetic field, the corresponding analog voltage signal for meeting function line is then generated and exports, for example, sinusoidal or cosine-shaped simulation electricity
Press signal.
Each hall sensing unit 301,302,303 can one or more dimension directions (such as：X, Y, Z-dimension) on sense
The magnetic flux density and/or magnetic field that magnet arrangement 166 is generated in different location.For example, the first hall sensing unit 301 is 2D Halls
Sensing unit can sense the magnetic flux density on two dimension directions (such as X and Y dimensions) and/or magnetic field.Show in as shown in Figure 2
In example, sensing device further 200 includes the first 2D hall sensings unit 301, the 2nd 2D hall sensings unit 302 and the 3rd 2D Hall senses
Answer unit 303.302 respective (e.g., Bx in the two-dimensional direction of first 2D hall sensings unit 301 and the 2nd 2D hall sensings unit
With By dimensions) synchronous (or simultaneously) sense change in magnetic flux density and/or changes of magnetic field, and the mould for meeting two function lines generated
(for example, a curve of output exports for cosine-shaped analog voltage signal, another curve of output is sine for quasi- voltage signal output
Shape analog voltage signal exports).First 2D hall sensings unit 301, the 2nd 2D hall sensings unit 302 and the 3rd 2D Halls
Sensing unit 303 can sense the magnetic field (or magnetic flux) that different location generates in piston/cylinder 108 of magnet arrangement 166.
In addition, multiple hall sensing units 301,302,303 in sensing device further 200 can sense at least one identical dimensional
Magnetic flux density on direction (for example, X or Y dimensions) and/or magnetic field.In one example, the first hall sensing unit 301 and
Two hall sensing units 302 can sense magnetic flux density and/or magnetic at least one identical dimensional direction (for example, X or Y dimensions)
.In another example, third hall sensing unit 303 and the second hall sensing unit 302 can sense identical dimensional direction
Magnetic flux density in (for example, X or Y dimensions) and/or magnetic field.
Sensing device further 200 further includes the first processing unit (DSP) 305.In fig. 2,301 He of the first 2D hall sensings unit
The output of 2nd 2D hall sensings unit 302 is connected to the first processing unit (DSP) 305.As magnet arrangement 166 is in piston cylinder
Cavity 161 in it is periodically mobile back and forth, the first processing unit (DSP) 305 reaches cylinder bottom and cylinder top in magnet arrangement 166
The clutch bottom portion position signal CBS and clutch top position signal CTS of skip signal form are generated when position, while in magnetic
The acquisition that mechanical periodicity signal is generated in 166 motion process of iron device generates motor message EPB.
Fig. 3 shows one embodiment block diagram of 305 concrete structure of the first processing unit.As shown in figure 3, the first processing dress
It includes comparator 387, modulus (A/D) conversion circuit 362, processor 364 and V/P conversions (i.e. voltage/PMW conversions) electricity to set 305
Road 366.The circuit structure of Fig. 3 indicates that the first processing unit 305 carries out signal the process of self-test.For example, the one of the present invention
In preferred embodiment, the first 2D hall sensings unit 301 and the identical two-dimensional directional of each leisure of the 2nd 2D hall sensings unit 302
Upper (such as Bx with By dimensions) synchronous (or simultaneously) senses change in magnetic flux density and/or changes of magnetic field and generate meet two letters
Analog voltage signal (motor message EPB) output of number line is (for example, a curve of output is that cosine-shaped analog voltage signal is defeated
Go out, another curve of output exports for sinusoidal analog voltage signal).First 2D hall sensings unit 301 and the 2nd 2D Halls
The output of its cosine-shaped analog voltage signal and the output of sinusoidal analog voltage signal are respectively transmitted at first by sensing unit 302
Manage device 305.
Comparator 388 and modulus (A/D) conversion circuit 362 in first processing unit 305 are simultaneously from the first 2D Hall senses
Answer reception respectively generates at unit 301 and the 2nd 2D hall sensings unit 302 two cosine-shaped analog voltage signals export (or
Two sinusoidal analog voltage signal outputs)；Comparator 388 exports two cosine-shaped analog voltage signals (or sinusoidal mould
Quasi- voltage signal output) periodically (for example, using 0.8ms as interval) sampling is carried out, then two sampled values are compared.
If two voltage values sampled are equal or difference is in permissible value, (for example the difference of two signal peaks is super
It crosses 5%), indicates that sensing signal self-test is normal.When self-detection result shows normal, self-detection result is sent to by comparator 388.Place
Reason device 364 sends out order in the first 2D hall sensings unit 301 and the 2nd 2D hall sensings to modulus (A/D) conversion circuit 362
Choose one group in two groups of outputs of unit 302, by connection 370 and 371, by the cosine-shaped digital voltage signal chosen output and
Sinusoidal analog voltage signal is transported to processor 364.By connection 367 and 368, processor 364 respectively believes control
Number and Linear voltage output be transported to V/P conversion circuits 366.Under the control of processor 364, V/P conversion circuits 366 will be handled
The Linear voltage output that the conveying of device 364 comes changes into pulse width modulation (Pulse Width Modulation or PMW) signal.Tool
Body：The cosine digital voltage signal and sinusoidal number electricity that the processing of processor 364 comes from the conveying of modulus (A/D) conversion circuit 362
Signal is pressed, to output one linear voltage output (i.e. motor message EPB).By line 368, processor 364 will be linear
Voltage output is transmitted to V/P conversion circuits 366；By line 367, processor 364 controls V/P conversion circuits 366 will linear electricity
It is 10%~90%PWM signals that pressure output, which is converted to change in duty cycle range,；Then, it is exported by output end 345, is exported simultaneously
Clutch bottom portion position signal CBS, the clutch top position signal CTS of switching signal form.V/P conversion circuits 366 will account for
Sky is that 10%~90%PWM signals (motor message EPB) are respectively transmitted to ECU than variation range.Work as duty ratio when ECU is received
Variation range be 10%~90%PWM output signal when and switching signal form clutch bottom portion position signal CBS, from
Clutch top position signal CTS, learns that self-test state is normal.
If two voltage values (including clutch bottom portion position signal CBS, the clutch top position signal that sample
CTS and motor message EPB) not etc. and person's difference is more than permissible value (for example the difference of two signal peaks is more than 5%), table
Show that sensing signal self-test is abnormal, by line 367, control voltage/PMW (V/P) conversion circuit of processor 364 generates constant
The pwm signal of 5% duty ratio；Then, constant 5% is accounted for by three output ends 353,354,355, V/P conversion circuits 366
The pwm signal of empty ratio sends ECU to.When ECU is received when the output signal for the PWM that duty ratio is constant 5% duty ratio, obtain
Know self-test abnormal state；If it is desired, ECU (or processor 364) to intermittent abnormality send out word report information or
Audible alert signal.
It should be noted that when V/P conversion circuits 366 export the pwm signal of 5% constant duty ratio, first is represented
The working condition of 2D hall sensings unit 301 and/or the 2nd 2D hall sensings unit 302 is in intermittent abnormality, and
It is not representing the first 2D hall sensings unit 301 and the 2nd 2D hall sensings unit 302 is in permanent fault.This intermittence
Abnormality may be interim or instantaneous due to certain operating condition caused by (such as vehicle under steam suddenly jolt,
Vibrations cause sensing element or magnet original paper position transient change or vehicle temporary improper of internal temperature carries under steam
It is high).That is, although the cylinder top position signal (CTS) currently measured, movement position signal (EPB) and cylinder bottom position signal
(CBS) it is unsuitable for using；Once operating condition restores normal, cylinder top position signal (CTS), the movement position signal measured later
(EPB) and cylinder bottom position signal (CBS) or can normal use.It is this report an error mode the advantages of one of be omitted individually
Error signal channel, for exporting error signal, and the mode that reports an error is compatible with existing ECU performances.Moreover, to the first 2D Halls
At sensing unit 301 and the 2nd 2D hall sensings unit 302 generate two cosine-shaped analog voltage signals output (or two just
String shape analog voltage signal exports) it is compared, precision is high, circuit is relatively easy.
As previously mentioned, the position moved back and forth with magnet arrangement 166 in the cavity 161 of piston cylinder, the first 2D is suddenly
Respectively (for example, Bx and By dimensions) senses magnetic flux in the two-dimensional direction for that sensing unit 301 and the 2nd 2D hall sensings unit 302
(curve of output is cosine-shaped electricity for variable density and/or changes of magnetic field and the voltage output for meeting two function lines that generates
Pressure output, another curve of output export for sinusoidal-shaped voltage).First 2D hall sensings unit 301 (or the 2nd 2D hall sensings
Unit 302) its cosine-shaped voltage output and sinusoidal-shaped voltage output be transmitted to modulus (A/D) in the first processing unit 305
Conversion circuit 362.Modulus (A/D) conversion circuit 362 will be from the first 2D hall sensings unit 301 (or the 2nd 2D hall sensing lists
302) cosine analog voltage signal and sinusoidal analog voltage signal that member senses is converted to digital signal, then by cosine digital
Voltage signal and sinusoidal digital voltage signal are transported to processor 364.Processor 364 will be defeated from modulus (A/D) conversion circuit 362
The cosine digital voltage signal and sinusoidal digital voltage signal sent are converted to a Linear voltage output, and computational methods are for example following
Shown in formula：
(1) function of output voltage (V)=angle=m x (angle)+b=m x θ+b
(2) function of output voltage (V)=stroke=m x (stroke)+b=m x S+b
(3) tan (θ)=sin (θ)/cos (θ)=Bx/By
(4) θ=arctan (θ)=arc (sin (θ)/cos (θ))=arc (Bx/By)
(5) output voltage (V)=m x arc ((sin (θ)/cos (θ))+b=m x arc (Bx/By)+b
(6) conversion of per stroke and angle=(L x 2)/360 °.
In above-mentioned 6 calculation formula, magnet arrangement 166 effective travel Lx2, (i.e. (S3-S2 in piston cylinder cavity 161
The distance between) x2) correspond to a circumferential periodic；I.e.：It can correspond to the upper half of circumference phase into stroke (from S2 to S3),
And exit the lower half that stroke (from S3 to S2) can correspond to the circumference phase.M and b (b can be 0) is two constant parameters, wherein m tables
The slope of linear function.Parameter b and m can according to for the first hall sensing unit 301, the second hall sensing unit 302 it is practical
The device used is obtained by simulation.θ is that the rectilinear path of magnet arrangement 166 is converted to the rotation angle after circumferential periodic,
BxAnd ByMagnetic flux respectively in X reversely and in Y-direction, L are the stroke in piston cylinder cavity 161 of magnet arrangement 166.
Referring now to Figure 2, three output ends 343,344 and 345 of the first processing unit 305 are respectively by cylinder top position signal
(CTS), movement position signal (EPB) and cylinder bottom position signal (CBS) are separately input to three current amplification circuits (three field effects
Should manage) 353,354 and 355, by the cylinder top position signal (CTS), movement position signal (EPB) and cylinder bottom position signal of output
(CBS) driving current amplification is carried out.Sensing device further 200 further includes current protecting circuit 311, three of them input terminal and three electric currents
Amplifying circuit 353,354 is connected with 355 output.Current protecting circuit 311 is to the first processing unit 305 and second
It manages device 306 and carries out the circuit of EMC protections, and clutch bottom portion position signal CBS is output to power amplifier 386, through work(
It is exported again after rate amplification.The function of power amplifier 386 is to enable cylinder bottom switching signal that high power load is driven for example to be driven
Chain relay.Pass through current protecting circuit 311, clutch top position signal CTS, motor message EPB and clutch bottom
Position signal CBS is output on three leading-out terminals 472,373 and 374.
Illustrate the diagnostic module in sensing device further 200 below in conjunction with Fig. 2 and Fig. 4.Diagnostic module includes：Diagnosis and detection electricity
Road, second processing device 306 and diagnostic circuit 310.Diagnosis and detection circuit is for sensing clutch plunger in cylinder bottom position.
According to an example of the present invention, third hall sensing unit 303 is a part for diagnosis and detection circuit.
Also with reference to Fig. 2, third hall sensing unit 303 can be with the first 2D hall sensings unit 301 and the 2nd 2D suddenly
Your sensing unit 302 synchronizes cylinder bottom position of the sensing magnet arrangement 166 in piston/cylinder 108, for believing as cylinder bottom position
The diagnostic signal (CBS+) of number (CBS).The output phase of the 346 third hall sensing unit 303 of input terminal of second processing device 306
Connection, and the diagnostic signal (CBS+) of cylinder bottom position signal (CBS) is transported to by current amplification circuit by its output end 347
(field-effect tube) 356 carries out driving current amplification.The cylinder bottom position signal (CBS) exported from current amplification circuit 355 is connected
To current stabilization circuit (regulator) 357；And the diagnostic signal of the cylinder bottom position signal (CBS) exported from current amplification circuit 356
(CBS+) it is connected to current stabilization circuit (regulator) 358.Current stabilization circuit (regulator) 357 and 358 is so that the sensor
It can apply in the classes client vehicle power-supply system environment such as 5V, 12V, 24V or 42V, improve the universality of product.The two
Current stabilization circuit is for being adapted to diagnostic process chip circuit, diagnostic module being made to work normally.In addition, the processing that the present invention uses
Chip is that can demarcate type, and terminal 377 (teaching) is chip programming interface, for being programmed to chip.
The cylinder bottom position signal that the cylinder bottom position signal (CBS) and current stabilization circuit 358 exported from current stabilization circuit 357 exports
(CBS) diagnostic signal (CBS+) is transported to diagnostic circuit (XOR circuit) 310 respectively, to cylinder bottom position signal (CBS) with
Cylinder bottom position diagnostic signal (CBS+) carries out exclusive or comparison.When signal CBS is identical as diagnostic signal CBS+, diagnostic circuit is (different
Or circuit) 310 output systems diagnosis (diagnosis) correct signal (can be high level signal or low level signal)；Work as letter
When number CBS is with diagnostic signal CBS+ differences, 310 output system diagnostic error signal of diagnostic circuit (XOR circuit) (can be low
Level signal or high level signal).By leading-out terminal 376, CBS diagnostic signals are transported to ECU by diagnostic circuit 310；If any
It needs, ECU (or processor 364) sends out word report information or audible alert signal to intermittent abnormality.
Fig. 4 shows one embodiment block diagram of 306 concrete structure of second processing device.As shown in figure 4, second processing fills
It includes modulus (A/D) conversion circuit 472 and processor 474 to set 306.Modulus (A/D) conversion circuit in second processing device 306
472 and processor 474 can in the first processing unit 305 modulus (A/D) conversion circuit 362 and processor 364 it is similar, therefore not
It repeats again.With the position that moves back and forth of the magnet arrangement 166 in the cavity 161 of piston cylinder, third hall sensing unit 303
(e.g., Bx and/or By dimensions) sensing change in magnetic flux density and/or changes of magnetic field and meeting for generating on one or more dimensions direction
The voltage output of function line.For example, third hall sensing unit 303 is 2D hall sensing units, the magnetic of two-dimensional directional can be sensed
Flux density changes and/or changes of magnetic field, and generates and meet the voltage outputs of two function lines (curve of output is cosine-shaped electricity
Pressure output, another curve of output export for sinusoidal-shaped voltage).Third hall sensing unit 303 is by its cosine-shaped voltage output
It is transmitted to second processing device 306 with sinusoidal-shaped voltage output.In order to facilitate being further processed for sensing signal, third processing dress
306 are set according to mathematical formulae listed above (1)-(6), the cosine-shaped voltage of coming will be conveyed from third hall sensing unit 303
Output and sinusoidal-shaped voltage output are converted to a Linear voltage output.
Fig. 5 shows processor 364 according to 6 formula listed above, to the first 2D hall sensings unit 301 (or second
2D hall sensings unit 302) caused by cosine-shaped analog voltage signal output and sinusoidal analog voltage signal output carry out
Processing, to generate a Linear voltage output 500.In Figure 5, abscissa indicates magnet arrangement 166 in piston cylinder cavity 161
In travel position, and ordinate indicate corresponding to 166 travel position of magnet arrangement relevant voltage export.As shown in figure 5, right
Should be in the travel position of the S2 in piston cylinder cavity 161 of magnet arrangement 166, the output voltage of processor 364 is VCTS；Correspond to
The output voltage of the travel position of the S3 in piston cylinder cavity 161 of magnet arrangement 166, processor 364 is VCBS；Corresponding to magnet
The voltage of travel position of the device 166 in piston cylinder cavity 161 between S2 and S3, the output of processor 364 is VEPB, (exist
Voltage VCTSWith voltage VCBSBetween voltage all indicate voltage be VEPB)。
Although present invention is described for the specific implementation mode shown in refer to the attached drawing, but it is to be understood that not
Away from present invention teach that spirit and scope and background under, clutch plunger position sensor of the invention and system can have perhaps
More versions.Art technology those of ordinary skill will additionally appreciate different modes to change reality disclosed in this invention
Apply the parameter in example, such as the type of size, shape or element or material, each fall within the present invention and claim spirit and
In range.
Claims (15)
1. a kind of clutch plunger position sensor, for sensing and generating clutch plunger in cylinder top position signal, motion bit
Confidence number and cylinder bottom position signal, it is characterised in that including：
Detection circuit, the signal generated on the move for sensing clutch plunger, the signal include corresponding clutch plunger
In cylinder top position, the signal of movement position and cylinder bottom position；
Self-checking circuit, the signal for being sensed to the detection circuit carry out self-test, to judge clutch plunger cylinder top position
Whether confidence number, movement position signal and cylinder bottom position signal there is mistake；
Diagnostic module, for carrying out fault diagnosis to the detection circuit；
The diagnostic module sensing clutch plunger in cylinder bottom position and exports cylinder bottom position diagnostic signal；And
Cylinder bottom position diagnostic signal is compared the diagnostic module with the cylinder bottom position signal, judges whether to occur
Mistake, and diagnostic signal whether export the clutch plunger position sensor abnormal state.
2. clutch plunger position sensor as described in claim 1, it is characterised in that：
The detection circuit includes：Main detection circuit and auxiliary detection circuit；
The main detection circuit is used for synchronous sensing clutch plunger generated signal on the move with the auxiliary detection circuit.
3. clutch plunger position sensor as claimed in claim 2, it is characterised in that further include：
First processing unit connect with the output of the main detection circuit and the auxiliary detection circuit, main detection circuit is felt
The signal measured is compared with the signal that the auxiliary detection circuit is sensed；
If the signal value matching or poor that signal and the auxiliary detection circuit that the main detection circuit is sensed are sensed
When value is in permissible value, then first processing unit exports the signal of the first form；
If signal value that signal and the auxiliary detection circuit that the main detection circuit is sensed are sensed mismatch or
When difference exceeds permissible value, then first processing unit exports the signal of the second form.
4. clutch plunger position sensor as claimed in claim 3, it is characterised in that：
The signal of first form includes the cylinder top position signal and cylinder bottom position signal of switching signal form；And duty
Than the movement position signal for the pwm signal form that variation range is 10%-90%；
The signal of the second form, including duty ratio be 5% pwm signal form cylinder top position signal, cylinder bottom position letter
Number and movement position signal.
5. such as claim 1, the clutch plunger position sensor described in 2,3 or 4, it is characterised in that the diagnostic module packet
It includes：
Diagnosis and detection circuit in cylinder bottom position and exports sensing signal for synchronous sensing clutch plunger；
Second processing device is connect with the output of the diagnosis and detection circuit, will be from the sensing of the diagnosis and detection circuit output
Signal processing is at cylinder bottom position diagnostic signal；
Diagnostic circuit, for the cylinder bottom position signal to be compared with cylinder bottom position diagnostic signal.
6. clutch plunger position sensor as claimed in claim 5, it is characterised in that：
If being matched from the cylinder bottom position signal with cylinder bottom position diagnostic signal, the diagnostic circuit output position sensing
The diagnostic signal of device normal condition,
If the cylinder bottom position signal is mismatched with cylinder bottom position diagnostic signal, the diagnostic circuit output position sensing
The diagnostic signal of device abnormality.
7. a kind of clutch plunger position sensing system, for generating clutch plunger in cylinder top position signal, motion bit confidence
Number and cylinder bottom position signal, it is characterised in that including：
Clutch plunger cylinder, including clutch plunger cylinder body and clutch plunger bar, clutch plunger bar can be in clutch plungers
It is moved back and forth in cylinder body；
Magnet arrangement, the magnet arrangement are installed on clutch plunger bar, and are done with the round-trip of clutch plunger bar
It moves back and forth；And
Such as clutch plunger position sensor according to any one of claims 1 to 6, the magnet arrangement is relative to institute
Clutch plunger position sensor is stated to move back and forth.
8. clutch plunger position sensing system as claimed in claim 7, it is characterised in that：
The clutch plunger position sensor is fixedly mounted on the clutch plunger cylinder.
9. a kind of position sensor, for sensing and generating testee in initial position signal, centre position signal and final
Position signal, it is characterised in that including：
Detecting element, the signal generated on the move for sensing testee, the signal include initial position, centre position
With the signal of final position；
Self-checking circuit, the signal for being sensed to the detecting element carries out self-test, to judge initial position signal, centre
Whether position signal and final position signal there is mistake；
Diagnostic module, for carrying out fault diagnosis to the detecting element, sensing testee in final position signal and exports
Final position diagnostic signal, and be compared with the final position signal, judge whether that mistake occurs, exports the position and pass
Diagnostic signal whether sensor abnormal state.
10. position sensor as claimed in claim 9, it is characterised in that：
The detection circuit includes：Main detection circuit and auxiliary detection circuit；
The main detection circuit is used for synchronous sensing testee generated signal on the move with the auxiliary detection circuit.
11. position sensor as claimed in claim 10, it is characterised in that：
First processing unit connect with the output of the main detection circuit and auxiliary detection circuit, and main detection circuit is sensed
To signal be compared with the signal that auxiliary detection circuit is sensed；
If the signal value matching or poor that signal and the auxiliary detection circuit that the main detection circuit is sensed are sensed
When value is in permissible value, then first processing unit exports the signal of the first form；
If signal value that signal and the auxiliary detection circuit that the main detection circuit is sensed are sensed mismatch or
When difference exceeds permissible value, then first processing unit exports the signal of the second form.
12. position sensor as claimed in claim 11, it is characterised in that：
The signal of first form includes the cylinder top position signal and cylinder bottom position signal of switching signal form；And duty
Than the movement position signal for the pwm signal form that variation range is 10%-90%；
The signal of the second form, including duty ratio be 5% pwm signal form cylinder top position signal, cylinder bottom position letter
Number and movement position signal.
13. the position sensor as described in any one of claim 9 to 12, which is characterized in that further include：
Diagnosis and detection circuit for the synchronous final position for sensing testee and exports sensing signal；
Second processing device is connect with the output of diagnosis and detection circuit, will be handled from the sensing signal of diagnosis and detection circuit output
At final position diagnostic signal；
Diagnostic circuit, for the final position signal to be compared with the final position diagnostic signal.
14. position sensor as claimed in claim 13, it is characterised in that：
If being matched from the final position signal with the final position diagnostic signal, the diagnostic circuit output position sensing
The diagnostic signal of device normal condition,
If the final position signal is mismatched with the final position diagnostic signal, the diagnostic circuit output position sensing
The diagnostic signal of device abnormality.
15. a kind of position sensing system, for sensing and generating testee in initial position signal, centre position signal and most
Whole position signal, it is characterised in that including：
Position sensor as described in any one of claim 9 to 14；And
Magnet arrangement, the magnet arrangement are installed on testee, and are carried out with the relatively described position sensor of testee
It moves back and forth.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410504564.9A CN105509773B (en) | 2014-09-26 | 2014-09-26 | position sensor and system and position sensor and system for clutch master cylinder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410504564.9A CN105509773B (en) | 2014-09-26 | 2014-09-26 | position sensor and system and position sensor and system for clutch master cylinder |
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| CN105509773A CN105509773A (en) | 2016-04-20 |
| CN105509773B true CN105509773B (en) | 2018-07-13 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796291A (en) * | 2016-09-05 | 2018-03-13 | 大陆汽车电子(长春)有限公司 | Clutch master cylinder position sensor detection means and method |
| CN110823565B (en) * | 2019-11-29 | 2024-05-31 | 杭州沃镭智能科技股份有限公司 | Clutch master cylinder detection method and device |
| CN112610385A (en) * | 2020-12-31 | 2021-04-06 | 重庆隆鑫通航发动机制造有限公司 | Device and method for measuring ignition advance angle of engine |
| CN114294416B (en) * | 2021-12-08 | 2023-05-12 | 东风柳州汽车有限公司 | Clutch sensor fault diagnosis method, device, equipment and storage medium |
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