CN105841732B - A kind of current vortex sensor static state automated calibration system - Google Patents
A kind of current vortex sensor static state automated calibration system Download PDFInfo
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- CN105841732B CN105841732B CN201610161625.5A CN201610161625A CN105841732B CN 105841732 B CN105841732 B CN 105841732B CN 201610161625 A CN201610161625 A CN 201610161625A CN 105841732 B CN105841732 B CN 105841732B
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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
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Abstract
A kind of current vortex sensor static state automated calibration system, including pedestal, static demarcating disk, for installing the clamp of sensor of corrected sensor, driving static demarcating disk is closer or far from the driving mechanism of corrected sensor and the guider of guiding static demarcating disk movement；Driving mechanism is installed in pedestal, and static demarcating disk is installed on by demarcating disc carrier in driving mechanism；Clamp of sensor is fixed on sliding block, pedestal is equipped with the guide rail of guide runner linear slide, be equipped on sliding block driving its slide determine torque knob, determine torque knob to be fixedly connected with miniature screw rod, determine torque knob to be arranged on block, miniature screw rod is engaged with miniature nut, and miniature nut is fixed on pedestal, when static demarcating disk props up corrected sensor, the idle running of torque knob is determined.The present invention has the advantages of corrected sensor can be made to be exactly zero with demarcating the distance between disk, improve calibration accuracy.
Description
The present invention is the applying date for 2014.02.13, Application No. 201410049861.9, a kind of entitled electric whirlpool
The divisional application of flow sensor static state automated calibration system.
Technical field
The present invention relates to test and sensor technical field, particularly a kind of static automatic calibration system of current vortex sensor
System.
Technical background
Current vortex sensor is a kind of non-cpntact measurement sensor, using sensing eddy current principle.When with high-frequency electrical
When the coil of stream is close to tested metal, electromagnetic field of high frequency caused by the high frequency electric on coil just generates sense on the metal surface
Induced current, the sensing electric current are known as current vortex.
Chinese patent application 20081036312.2 discloses a kind of full-automatic eddy current sensor dynamic/static checking instrument,
Including being popped one's head in by school, it is fore-lying device, static demarcating test specimen disk, static check probe mounting bracket, driven by stepper motors linear
Module, the packaged type guide rail extensible frame being driven by it, the positioning link stopper being correspondingly arranged on guide rail extensible frame and linear module
And on-mechanical contact position-sensing switch and the central control unit with touch-screen, wherein, static demarcating test specimen disk, which is arranged on, leads
On rail extensible frame, static check probe mounting bracket is arranged in tester disk, central control unit and on-mechanical contact
Position-sensing switch is connected through stepper motor driver with stepper motor, is popped one's head in by school and is connected through fore-lying device with central control unit；Its
Static test workflow includes at least：A, install in static check probe mounting bracket and popped one's head in by school, and connect phase
The signal connecting line answered；B, manually adjust makes its probe tip face be come into full contact with static demarcating test specimen panel surface by school probe；C、
Consecutive points displacement spacing and number of scan points are set by touch-screen；D, AUTOMATIC STATIC checking routine is started；E, center control is single
Member starts running through stepper motor driver control stepper motor；F, driving stepper motor is equipped with the static check spy of sensor
Head mounting bracket is moved to probe tip face and the increased direction of static demarcating dish gap；G, central control unit detection and record
Voltage output signal value and position according to the variation for output valve of being popped one's head in by school, judge whether it enters linear operating region；If H,
Linear operating region is entered by the output valve that school is popped one's head in, into next step, otherwise, repeats above-mentioned F, G step；I, record is by school
The linear initial clearance and the linear gap voltage value in linear work starting point of probe；J, according between the consecutive points pre-entered
Away from and number of scan points, calculate the single step run step-length of stepper motor；K, central control unit controls stepping according to the step-length of setting
Motor remains in operation, and drives static check probe mounting bracket to probe tip face and the increased direction of static demarcating test specimen dish gap
It is moved to next displacement point；L, record is popped one's head in by school in the linear gap voltage value of the displacement point；M, central control unit is automatic
The gap voltage value of record, storage each point；N, on a display screen using displacement as abscissa, gap voltage value is central control unit
Ordinate, real-time rendering, display treat the static linear characteristic curve and/or sensitivity error curve of school probe, while will be complete
Into number of scan points and/or the test shift length completed it is cumulative；If O, scanning element numerical value and/or total test displacement away from
From reaching pre-set value, into next step, otherwise repeatedly step K-N；P, central control unit calculates the linear starting of probe
Voltage, linear initial clearance, sensitivity, sensitivity error, nonlinearity erron, and output format report.This tester
Shortcoming is：1st, the position by school probe and static demarcating test specimen disk is adjusted manually, can not ensure the sound end of corrected sensor
Face is bonded just with static demarcating test specimen panel surface（That is the distance of probe tip face and static demarcating test specimen disk is exactly zero）, hold very much
Easily there is contact not enough or abut the phenomenon that too tight, reduce checking precision.2nd, a type of current vortex can only be verified to pass
Sensor.
The content of the invention
In order to overcome existing current vortex sensor static checking instrument that can not ensure between corrected sensor and calibration disk
Distance exactly zero the shortcomings that, the present invention provides one kind can make corrected sensor with calibration the distance between disk exactly
Zero, improve the current vortex sensor static state automated calibration system of calibration accuracy.
A kind of current vortex sensor static state automated calibration system, including pedestal, static demarcating disk is sensed for installing by school
The clamp of sensor of device, driving static demarcating disk is closer or far from the driving mechanism of corrected sensor and guiding static demarcating disk
Mobile guider；Driving mechanism and guider are installed in pedestal, and static demarcating disk is installed on by demarcating disc carrier
In driving mechanism；
It is characterized in that：Clamp of sensor is fixed on sliding block, and pedestal is equipped with the guide rail of guide runner linear slide, sliding
Be equipped on block driving its slide determine torque knob, determine torque knob and be fixedly connected with miniature screw rod, determine torque knob and wear
In on block, miniature screw rod is engaged with miniature nut, and miniature nut is fixed on pedestal, and static demarcating disk props up corrected sensor
When, determine the idle running of torque knob.
The structure that the first determines torque knob is as follows：Determining torque knob includes outer ring, ratchet, elastic parts and shaft；Outside
It encloses one end and is equipped with the holding tank for accommodating ratchet, the outer ring other end is fixedly connected with miniature screw rod, such as is fixedly connected by spline；
Elastic parts is equipped between ratchet and outer ring, elastic parts has multiple, and elastic parts is uniformly distributed along the inner wall of outer ring；Elastic group
Part includes being in compression shape with the wedge block of ratchet tooth contact and the elastic component being arranged between wedge block and outer ring, elastic component
State；The inclined-plane of hook tooth is bonded with the inclined-plane of wedge block, the equal rough surface in the inclined-plane of hook tooth and the inclined-plane of wedge block；Ratchet with
Shaft is fixed.Shaft can be fixed as the application object or shaft of external force with turncap, application of the turncap as external force
Object.
Further, multiple threaded holes are uniformly offered on outer ring, an elastic parts are set in each threaded hole, each
The outer end of threaded hole is closed by thread plug, and elastic component is between thread plug and wedge block.
When static demarcating disk does not contact with corrected sensor, during rotating shaft, since elastic component is by wedge type block and ratchet
It compresses, the torque acted in shaft is insufficient to allow wedge type block to slide, and outer ring follows pawl wheel, while outer ring band actuating miniature spiral shell
Bar rotates, and miniature screw rod drives corrected sensor to be translated to close to the direction of static demarcating disk.When static demarcating disk by school with being passed
When sensor is bonded, miniature screw rod can not continue to move to.Continue to increase rotation torque, be enough when rotation torque increases to by wedge type block
When slowly in press-in accommodating chamber, wedge block is slided along the inclined-plane of hook tooth, and elastic component decrement increase, wedge block enters accommodating chamber
Interior, until wedge block and hook tooth completely disengage, elastic component recovers original decrement, and wedge type block is made to be pasted with next hook tooth
It closes, i.e., ratchet skids, and dally a tooth pitch.Wedge block sends click sound when contacting next hook tooth, prompt static mark
Price fixing has been bonded with corrected sensor.
The structure for determining torque knob second is as follows：Determine torque knob include knob body, the first ratchet, the second ratchet,
Attachment screw, spring and sleeve；Attachment screw is included with the fixed connecting shaft of miniature screw rod, the transmission shaft being connected with the first ratchet
And the link block between connecting shaft and transmission shaft；First ratchet is slideably socketed on transmission shaft, and transmission shaft is equipped with
First limited block；First ratchet and the second ratchet include wheel teeth portion and sleeve part, wheel teeth portion and the second spine of the first ratchet respectively
Limiting slot is respectively equipped on the sleeve part of the wheel teeth portion engagement of wheel, the sleeve part of the first ratchet and the second ratchet；First limited block
It is inserted into the limiting slot of the first ratchet；Knob body includes turncap, shaft and the rounded stops between turncap and shaft, turns
Axis is equipped with the second limited block, and the second limited block is inserted into the limiting slot of the second ratchet；The link block of attachment screw leads to sleeve
Threaded connection is crossed, spring is located between the link block and the first ratchet of attachment screw, in compressive state；The other end of sleeve is set
There is the annular retaining ring to extend internally, rounded stops are located in sleeve, and turncap exposes to sleeve, and rounded stops push against annular retaining ring.
When static demarcating disk does not contact with corrected sensor, when rotating turncap, shaft and its limited block drive the second spine
Wheel rotation, since the second ratchet is engaged with the first ratchet, the first ratchet follows the second pawl wheel, at this point, transmission shaft and its limit
Position block makes attachment screw follow rotation, and attachment screw rotates miniature screw rod, and miniature screw rod is rotated while being passed with by school
Sensor is translated to close to the direction of static demarcating disk.
When corrected sensor is bonded with static demarcating disk, miniature screw rod can not continue to move to.When the torque that external force generates
Increase amount of spring compression, the second ratchet is slided with respect to the first ratchet, and the gear teeth of the second ratchet are from the gear teeth most bottom of the first ratchet
When place slides to highest point, into second position of engagement, spring recovers for the wheel teeth portion of the first ratchet and the wheel teeth portion of the second ratchet
Original decrement, the first ratchet and the engagement of the second ratchet, send click sound, corrected sensor are prompted to be pasted with static demarcating disk
It closes.
Guide rail uses crossed roller guide rail, to reduce frictional force when sliding.
Further, pedestal is equipped with the locking device of fixed slide position, and locking device includes lock-screw, lock bracket
With locking slide plate；Lock bracket is fixed on pedestal, and lock-screw is arranged in by screw pair on lock bracket, lock-screw
Head end is equipped with handle, and locking slide plate is fixed on the tail end of lock-screw, and locking slide plate is rounded, and the tail end of lock-screw exposes to
Lock bracket；When lock-screw is in first position, locking slide plate has gap with sliding block；When lock-screw is in the second position,
Locking slide plate is pressed in sliding block.After corrected sensor is bonded just with static demarcating disk, rotation lock screw makes it to close
The direction of sliding block screws in, and lock-screw reaches the second position, locks slide plate pressed slider, and the position of sliding block is fixed, and avoids school
Corrected sensor position changes during standard.When needing to adjust the position of corrected sensor, reset to lock-screw
First position, locking between slide plate and sliding block has gap, and sliding block can move freely.
Driving mechanism is linear motor.Calibration disc carrier is connected with linear motor.In order to ensure static demarcating disk is along straight line
Movement sets line slideway and the link block with line slideway cooperation on pedestal, and calibration disc carrier is fixed on link block, together
When link block and the output terminal of linear motor fix so that static demarcating disk is along straight line to away from or close to corrected sensor
Direction movement.
Alternatively, driving mechanism includes stepper motor, the ball-screw and transmission nut being connected with stepper motor, transmission nut
The link block of the upper restricted nut rotation of fixation, link block one side are connected with transmission nut, and opposite side is connected with sliding block.Demarcate disk
Stent is fixed on link block.Driving stepper motor ball-screw rotates, and transmission nut is axially translated along ball-screw, so as to
Static demarcating disk is driven closer or far from corrected sensor.
Guider uses rolling guide, and guidance quality is good, coefficient of friction is small, rigid high-bearing capacity is big, stroke is long, is conducive to
Ensure motion control accuracy.
In order to limit the lift area of static demarcating disk, pedestal is equipped with the first extreme position travel switch and second limit
Position travel switch, static demarcating disk move between two extreme position travel switches.When the rolling being connected with static demarcating disk
When dynamic guide rail slide block or grating ruler reading head reach any one extreme position travel switch, driving mechanism stopping action.First
Extreme position travel switch and the second extreme position travel switch are opened respectively including Hall switch and mechanical limit switch, Hall
It closes as contactless limit switch.If during one switch failure of any of which, all there is another switch that can ensure static state
Disk is demarcated without departing from stroke range.
In order to avoid driving mechanism is disturbed be subject to external working environment, extend the service life of driving mechanism, by pedestal
Be arranged to be made of pedestal and shell, driving mechanism, guider and two kinds of extreme position travel switches be respectively positioned on pedestal with it is outer
In the chamber that shell surrounds.
Sliding slot is offered on shell, calibration disc carrier is slided in sliding slot；It demarcates and first is equipped between disc carrier and shell
Covering and the second covering, the first covering and the second covering are divided into calibration disc carrier both ends, two covering difference
One end is fixed with shell, and the other end is fixed with calibration disc carrier；Two coverings are in organ shape respectively；The both sides of sliding slot are set respectively
There is the guide rail for being oriented to covering stretching motion, calibration disc carrier is set up between guide rail.It demarcates disc carrier and two coverings is equal
It slides between the guide groove of guide rail.Guide rail is Z-shape, and the inner surface of guide rail and shell surrounds guide groove.First covering and second hides
Housing completely encloses sliding slot, and dust is avoided to fall into the chamber that shell is surrounded with pedestal.
Grating scale is provided on pedestal, link block is equipped with grating ruler reading head.The present invention utilizes grating scale and grating scale
Reading head obtains the displacement of static demarcating disk, and accuracy is high.Pedestal is equipped with grating scale installing plate, and grating scale is fixed on grating scale
On installing plate, reading head is fixed on by connecting plate on link block.First extreme position travel switch and the second extreme position row
Cheng Kaiguan is both secured on grating scale installing plate.
Further, clamp of sensor includes installing plate fixed with sliding block and the stent for installing sensor, stent lead to
Fastening screw lock is crossed on installing plate；The first mounting portion of mounting plane type sensor is useful on stent and for installing circle
Second mounting portion of cylindrical sensor, the first mounting portion include the T-slot being opened on stent and are slidably disposed in T-slot
Interior T-nut, T-nut are equipped with threaded hole, T-nut at least two；Planar shaped sensor passes through screw and T-shaped spiral shell
Mother is fixed；Second mounting portion includes the cylindrical hole being opened on stent, is set between cylinder shape sensor and cylindrical hole
Put various sizes of bushing, cradle top is equipped with threaded hole and the lock-screw of lock sensor coordinates, installing plate be equipped with
The kidney slot of cylindrical hole contraposition, cylinder shape sensor part is located in kidney slot.Design various sizes of bushing and can
The T-nut of slip makes clamp of sensor can be suitably used for various sizes of sensor.
When unclamping trip bolt, stent can be slided up and down along installing plate, and cylindrical hole aligns always with kidney slot.
In order to which guiding trestle slides, the both sides of stent are equipped with L-shaped wing plate, and installing plate is between stent and L-shaped wing plate, tightly
Gu screw is arranged on L-shaped wing plate.Gap between stent and L-shaped wing plate forms the guide groove that guiding trestle slides, so that branch
Frame can only be moved up and down along the side of installing plate, it is ensured that cylindrical hole aligns always with kidney slot.
Further, during verification, the initial distance of static demarcating disk and corrected sensor is, wherein,It is sensing
The starting point of device linear work section,It is the terminal of linear sensor active section, the measurement point of corrected sensor is with static demarcating disk
Initial position centered on it is symmetrical at equal intervals.
Further, calibration system has sensor voltage acquisition channel and sensor current acquisition channel, analog switch group
Selectively unlock sensor voltage acquisition channel and/or sensor current acquisition channel.
The beneficial effects of the present invention are：
1st, it can ensure that the distance of static demarcating disk and corrected sensor is exactly zero by determining torque knob, improve verification
Precision.
2nd, clamp of sensor can install cylinder shape sensor and mounting plane type sensor, applicability are wide.
3rd, calibration system can gather the voltage signal of sensor output and gather the current signal of sensor output,
Adjustable voltage output type, current-output type current vortex sensor and voltage and current while output type current vortex sensor are fitted
It is wide with scope.
4th, calibration system can automatically determine the linear working range of corrected sensor, and then be accurately positioned corrected sensor most
Good installation site.
5th, high certainty of measurement：The present invention uses the closed-loop control system using the displacement signal that grating scale exports as feedback
Precision ball screw and coefficient of friction with long stroke, without backhaul gap are small, rigidity is high, bearing capacity is big, the rolling of stroke length
Guide rail is used cooperatively, and calibration system is made to have high positioning accuracy, and stability is good, and systematic error is small, and calibration accuracy is high.
6th, pedestal is arranged to be made of pedestal and shell, and driving mechanism and two kinds of extreme position travel switches are respectively positioned on pedestal
In the chamber surrounded with shell, meanwhile, design covering closing provides the calibration sliding slot that disc carrier slides, and chamber is made to be in always
Completely enclosed state reduces the interference effect of outer bound pair calibration system, extends the service life of calibration system.
7th, range ability is big：The present invention has used linear grating ruler as displacement measurement element, and measuring range scope is big.This
Invention measurement range is 0 ~ 100mm, and it is short to overcome calibrating installation can only calibrate caused by the limitation of displacement measurement element
The defects of range current vortex sensor.
8th, calibration process safety：Static calibration device is equipped with Hall in the first extreme position and the second extreme position and opens
It closes and mechanical limit switch.Static demarcating disk moves between two limit positions.When the rolling being connected with static demarcating disk is led
Driving mechanism stopping acts when rail sliding block or grating ruler reading head reach any one extreme position.If any one switch loses
During effect, all there is another limit switch to ensure that static demarcating disk without departing from stroke range, has double protection.
Description of the drawings
Fig. 1 is the schematic diagram of the present invention.
Fig. 2 is the structure diagram of the present invention.
Fig. 3 is that the first determines the schematic diagram that torque knob is connected with miniature screw rod, miniature nut.
Fig. 4 is the stereogram that the first determines torque knob.
Fig. 5 is the axial sectional view that the first determines torque knob.
Fig. 6 is the radial cross-section that the first determines torque knob.
Fig. 7 is second of structure principle chart for determining torque knob.
Fig. 8 is the schematic diagram of retaining mechanism.
Fig. 9 is the schematic diagram of driving mechanism and static demarcating disk on pedestal.
Figure 10 is the schematic diagram that the first covering, the second covering and shell and calibration disc carrier are connected.
Figure 11 is clamp of sensor installation cylindrical type current vortex sensor schematic diagram.
Figure 12 is the schematic diagram of bushing.
Figure 13 is clamp of sensor mounting plane type current vortex sensor schematic diagram.
Figure 14 is the static characteristic curve of current vortex sensor.
Figure 15 is the definite procedure chart of corrected sensor linear work section and best position.
Figure 16 is closed-loop control system functional block diagram.
Specific embodiment
Referring to the drawings, further illustrate the present invention：
As shown in Figure 1, 2, a kind of current vortex sensor static state automated calibration system, including pedestal, static demarcating disk 20 is used
In the clamp of sensor of installation corrected sensor, driving static demarcating disk 20 closer or far from corrected sensor driving mechanism and
It is oriented to the guider of static demarcating disk movement；Driving mechanism and guider are installed in pedestal, and static demarcating disk 20 is worn
It on calibration disc carrier 22, and is fixed with lock-screw 21, calibration disc carrier 22 is installed in driving mechanism；
Clamp of sensor is fixed on sliding block 8, and pedestal is equipped with the guide rail 10,11 of 8 linear slide of guide runner, sliding block 8
On be equipped with driving its slide determine torque knob, determine torque knob and be fixedly connected with miniature screw rod 15, determine torque knob and wear
In on block 9, miniature screw rod 15 is engaged with miniature nut 16, miniature nut 16 is fixed on pedestal, and static demarcating disk 20 supports
Firmly during corrected sensor, the idle running of torque knob is determined.
As in Figure 3-5, the first determine torque knob 14 structure it is as follows：Determining torque knob includes outer ring 14-1, ratchet
14-5, elastic parts and shaft 14-6；Outer ring 14-1 one end is equipped with the holding tank for accommodating ratchet 14-5, the outer ring 14-1 other ends with
Miniature screw rod 15 is fixedly connected, such as is fixedly connected by spline；Elastic parts, bullet are equipped between ratchet 14-5 and outer ring 14-1
Property component has multiple, and elastic parts is uniformly distributed along the inner wall of outer ring 14-1；Elastic parts includes the wedge shape with ratchet tooth contact
The block 14-4 and elastic component 14-3 being arranged between wedge block 14-4 and outer ring 14-1；The inclined-plane of hook tooth is with wedge block 14-4's
Inclined-plane is bonded, the equal rough surface in inclined-plane on the inclined-plane and wedge block 14-4 of hook tooth；Ratchet 14-5 is fixed with shaft 14-6.Shaft
14-6 can be fixed as the application object or shaft 14-6 of external force with turncap, application object of the turncap as external force.
Multiple threaded holes are uniformly offered on the 14-1 of outer ring, threaded hole top half is threaded, and the latter half is logical
Hole forms the accommodating chamber of wedge type block 14-4.An elastic component 14-3 is set in each threaded hole, the outer end of each threaded hole is by spiral shell
Line plug 14-2 is closed, and elastic component 14-3 is between thread plug 14-2 and wedge block 14-4, in compressive state.
When static demarcating disk 20 does not contact with corrected sensor, during rotating shaft 14-6, since elastic component 14-3 will be carved
Shape block 14-4 and ratchet 14-5 is compressed, and the torque acted on shaft 14-6 is insufficient to allow wedge type block 14-4 to slide, outer ring 14-1
Ratchet 14-5 is followed to rotate, while outer ring 14-1 bands actuating miniature screw rod 15 rotates, miniature screw rod 15 drive corrected sensor to by
The direction translation of nearly static demarcating disk 20.When static demarcating disk 20 is bonded with corrected sensor, miniature screw rod 15 can not continue
It is mobile.Rotation torque increases, when rotation torque, which increases to, to be enough wedge type block 14-4 being slowly pressed into accommodating chamber, wedge block
14-4 is slided along the inclined-plane of hook tooth, and the decrement increase of elastic component 14-2, wedge block 14-4 enters in accommodating chamber, until wedge shape
Block 14-4 is completely disengaged with hook tooth, and elastic component 14-2 recovers original decrement, and wedge type block 14-4 is made to be pasted with next hook tooth
It closes, i.e. ratchet 14-5 skids, and dally a tooth pitch.Wedge block 14-4 sends click sound when contacting next hook tooth, carries
Show that static demarcating disk 20 has been bonded with corrected sensor.In the present embodiment, elastic component 14-3 uses cylindrical spring.
Guide rail uses crossed roller guide rail 10,11, to reduce frictional force when sliding.
Pedestal is equipped with the locking device of fixed slide position, as shown in figure 8, locking device includes lock bracket 17, lock
Tight screw 18 and locking slide plate 19；Lock bracket 17 is fixed on pedestal, and lock-screw 18 is arranged in locking branch by screw pair
On frame 17, the head end of lock-screw 18 is equipped with handle, and locking slide plate 19 is fixed on the tail end of lock-screw, and locking slide plate 19 is in circle
Shape, the tail end of lock-screw 18 expose to lock bracket 17；When lock-screw 18 is in first position, slide plate 19 and sliding block are locked
8 have gap；When lock-screw 18 is in the second position, locking slide plate 19 is pressed in sliding block 8.When corrected sensor and static demarcating
For disk 20 just after fitting, rotation lock screw 18 makes it be screwed in close to the direction of sliding block 8, and lock-screw 18 reaches second
It puts, locks 19 pressed slider 8 of slide plate, the position of sliding block 8 is fixed, and corrected sensor position in calibration process is avoided to change
Become.When needing to adjust the position of corrected sensor, lock-screw 18 is made to reset to first position, locking slide plate 19 and sliding block 8
Between have gap, sliding block 8 can move freely.
Driving mechanism is linear motor.Calibration disc carrier 22 is connected with linear motor.In order to ensure 20 edge of static demarcating disk
Linear motion, sets line slideway and the link block 26 with line slideway cooperation on pedestal, and calibration disc carrier 22 is fixed on company
It connects on block 26, while link block 26 and the output terminal of linear motor are fixed, so that static demarcating disk 20 is along straight line to separate
Or it is moved close to the direction of corrected sensor.
Certainly, those skilled in the art it is contemplated that driving mechanism using stepper motor 30 and ball-screw 28 come real
It is existing.Specifically, as shown in figure 9, driving mechanism includes stepper motor 30, the ball-screw 28 being connected with stepper motor and transmission
Nut 27 fixes the link block 26 of restricted nut rotation on transmission nut 27, and 26 one side of link block is connected with transmission nut 27,
Opposite side is connected with rolling guide sliding block 31.Calibration disc carrier 22 is fixed on link block 26.Driving stepper motor ball-screw
28 rotations, transmission nut 27 is along 28 axial translation of ball-screw, so as to which static demarcating disk 20 be driven to be passed closer or far from by school
Sensor.
Guider uses rolling guide 31,32, and guidance quality is good, coefficient of friction is small, rigid high-bearing capacity is big, stroke is long,
Advantageously ensure that motion control accuracy.
As shown in figure 9, in order to limit the lift area of static demarcating disk 20, pedestal is opened equipped with the first extreme position stroke
It closes and the second extreme position travel switch, static demarcating disk moves between two extreme position travel switches.It is marked when with static state
When the rolling guide sliding block 31 or reading head 34 that price fixing 20 connects reach any one extreme position travel switch, driving mechanism is stopped
Stop is made.First extreme position travel switch and the second extreme position travel switch include mechanical limit switch 37 and suddenly respectively
You switch 38, and Hall switch 37 is contactless limit switch.If during one switch failure of any of which, all there is another
Switch can ensure static demarcating disk 20 without departing from stroke range.
In order to avoid driving mechanism is disturbed be subject to external working environment, extend the service life of driving mechanism, by pedestal
It is arranged to be made of pedestal 29 and shell 13, driving mechanism, guider and two kinds of extreme position travel switches are respectively positioned on pedestal
In 29 chambers surrounded with shell 13.
Sliding slot is offered on shell 13, calibration disc carrier 22 is slided in sliding slot；As shown in Figure 10, demarcate disc carrier 22 with
25-2 points of the first covering 25-1 and the second covering 25-2, the first covering 25-1 and the second covering are equipped between shell 13
Arranged on 22 both ends of calibration disc carrier, two coverings 25 are distinguished one end and are fixed with shell 13, and the other end and calibration disc carrier 22 are solid
Fixed, two coverings 25-1,25-2 are in organ shape respectively；The both sides of sliding slot, which are respectively equipped with, is oriented to leading for covering stretching motion
Rail, calibration disc carrier 22 are set up between guide rail.Calibration disc carrier 22 and two coverings 25 slide on guide rail guide groove it
Between.Guide rail is Z-shape, and the inner surface of guide rail and shell 13 surrounds guide groove.First covering 25-1 and the second covering 25-2 are complete
Sliding slot is closed, dust is avoided to fall into the chamber that shell 13 is surrounded with pedestal 29.
It is provided with grating scale 35 on pedestal 29, grating ruler reading head 34 is provided with by connecting plate 33 on link block 26.This
Invention obtains the displacement of static demarcating disk 20 using grating ruler reading head 34 and grating scale 35, and accuracy is high.Pedestal 29 is equipped with
Grating scale installing plate 36, grating scale 35 are fixed on grating scale installing plate 36.First extreme position travel switch and second limit
Position travel switch is both secured on grating scale installing plate 36.
As figs 11-13, clamp of sensor includes fixing the lock-screw 1 of corrected sensor, for installing quilt
The stent 2 of school sensor and installing plate fixed with sliding block 3, stent 2 is lock onto by trip bolt 6 on installing plate 3；Stent 2
On be useful for the first mounting portion of mounting plane type sensor and the second mounting portion for installing cylinder shape sensor, the first peace
Dress portion includes the T-slot being opened on stent 2 and the T-nut 7 being slidably disposed in T-slot, and T-nut 7 is equipped with
Threaded hole, T-nut 7 at least two；Planar shaped sensor is fixed by screw and T-nut 7；Second mounting portion includes opening
Cylindrical hole on stent 2 sets various sizes of bushing 4, stent between cylinder shape sensor and cylindrical hole
Top is equipped with threaded hole and the lock-screw 1 of lock sensor coordinates, and installing plate 3 is equipped with the kidney-shaped with cylindrical hole contraposition
Slot, cylinder shape sensor part are located in kidney slot.Various sizes of bushing 4 and slidable T-nut 7 are designed, biography can be made
Sensor fixture is suitable for various sizes of sensor.
When unclamping trip bolt 6, stent 2 can be slided up and down along installing plate 3, and cylindrical hole aligns always with kidney slot.
In order to which guiding trestle 2 slides, the both sides of stent 2 are equipped with L-shaped wing plate 5, and installing plate 3 is located at stent 2 and L-shaped wing plate 5
Between, trip bolt 6 is arranged on L-shaped wing plate 5.Gap between stent 2 and L-shaped wing plate 5 forms leading for the slip of guiding trestle 2
Slot, so that stent 2 can only be moved up and down along the side of installing plate 3, it is ensured that cylindrical hole aligns always with kidney slot.
During verification, static demarcating disk 20 and the initial distance of corrected sensor are, wherein,It is linear sensor
The starting point of active section,It is the terminal of linear sensor active section, the measurement point of corrected sensor is with the first of static demarcating disk 20
It is symmetrical at equal intervals centered on beginning position.
Calibration system has sensor voltage acquisition channel and sensor current acquisition channel, and analog switch group selection is opened
Open sensor voltage acquisition channel and/or sensor current acquisition channel.
With reference to Figure 14, the output of current vortex sensor and the relation curve in gap are known as gap-voltage/gap-electric current song
Line, the part substantially close to straight line on curve are referred to as the range of linearity of sensor, and the slope of linearity range is that current vortex passes
Sensor sensitivity, it corresponds to the variation of sensor output when per unit gap changes.The displacement range of pick up calibration is
Linear work section starting pointTo the terminal of linear work sectionBetween.
Due to only having the output of preferable current vortex sensor with gap in absolute linear relationship, actual current vortex passes
Sensor output is approximate linear relationship in the range of linearity with gap, minimum in the midpoint linearity of the range of linearity, sensitive
Spend highest.Using the midpoint of the range of linearity as the midpoint of calibration range, in the linear working range of sensor, selecting test point
When symmetrical at equal intervals centered on the midpoint by the range of linearity, calibration accuracy higher.Therefore sensor best position
It is the point midway of its linear working range, i.e., sensor is with static demarcating dish gapPlace.
Therefore important process before calibration sensor be to determine sensor linear working range and sensor most
Good installation site.As shown in figure 15, the linear work section of current vortex sensor and the definite method of best position are as follows：
（1）According to the shape of corrected sensor the first mounting portion of clamp of sensor or the second mounting portion is selected to complete electric whirlpool
The installation of flow sensor.
（2）By determining torque knob gap between current vortex sensor and static demarcating disk 20 is made to be zero, while pass through electricity
Eddy current sensor static state automated calibration system gathers and records displacement at this time and sensor output.
（3）Gap between current vortex sensor and static demarcating disk 20, Zhi Daochuan are slowly increased by step-length of 0.01mm
Until sensor output valve hardly changes.The position of the current vortex sensor static state automated calibration system meeting each step of automatic collection
Shifting value and sensor output, record number of test points N, and store data into controller.
（4）The controller of calibration system is by step（3）The data two-end-point connection of middle acquisition is found out farthest with line distance
Test point, be then divided into 2 sections from the test point by the data of acquisition.
（5）In the same way the data being segmented are continued to be segmented, until so cyclingIt is secondary.
（6）Linear fit is carried out to each segment data with least square method, sensor in each segment data is obtained and exports with position
Move variationValue.
（7）By step（6）Middle numerical value is less than 0.5It rejects, compares remaining after rejecting, it is mutually inclined to extract size
One group within 95% of differenceValue, this groupCorresponding displacement rangeThe as linear work model of corrected sensor
It encloses.For current vortex sensor linear work section starting point,For the terminal of current vortex sensor linear work section.
（8）When will verify, static demarcating disk 20 and the initial distance of corrected sensor are arranged to。
（9）Initial position when linear work section is being verified using static demarcating disk is as calibration midpoint, with initial position
Centered on symmetrical equally spaced several test points is taken to calibrate sensor.
With reference to Figure 16, the displacement signal of controller is sent to by communication module in count comparator, as a reference
Amount, FPGA according to controller instruct control stepper motor driver work, stepper motor 30 drive ball-screw 28 rotate from
And the linear motion of static demarcating disk 20 is driven, grating scale 34 feeds back to the displacement signal of acquisition in the count comparator of FPGA
Compared with reference quantity, decided whether to send pulse signal and direction signal and pulse signal again according to the size of deviation
Number.So as to achieve the purpose that accurate control sensor displacement.
Calibration system has sensor voltage acquisition channel and sensor current acquisition channel, and analog switch group selection is opened
Open sensor voltage acquisition channel and/or sensor current acquisition channel.
When carrying out pick up calibration, the type of signal is exported in the control interface of controller according to sensor is calibrated
Selection is calibrated the type of sensor, and passes through serial communication module and transmit commands to the control simulation of FPGA control systems and open
It closes.It is as follows to implement step：
（1）When it is voltage output type sensor to be calibrated sensor, selected in the sensor type on controller interface
Voltage-type is selected, FPGA control systems make analog switch select cut-in voltage acquisition channel, acquisition sensing according to the instruction of controller
The voltage signal of device output, calibration system is according to calibration of the displacement, voltage signal realization of acquisition to voltage output type sensor.
（2）When it is current-output type sensor to be calibrated sensor, selected on controller interface in sensor type
Current mode, FPGA control systems make analog switch select firing current acquisition channel according to the instruction of controller, gather sensor
The current signal of output, calibration system is according to calibration of the displacement, current signal realization of acquisition to current-output type sensor.
（3）When it is voltage and current output type sensor to be calibrated sensor, on controller interface in sensor type
Current/voltage type is selected, FPGA control systems instruct control analog switch firing current acquisition channel and electricity simultaneously according to controller
Acquisition channel is pressed, is gathered while realizing the electric current to sensor output, voltage signal.Calibration system according to the displacement of acquisition,
Electric current, voltage data calibrate Current Voltage output type sensor.
Embodiment 2
The present embodiment in place of the difference of embodiment 1 with being：The concrete structure for determining torque knob is different.Except determining torque knob
Structure in addition is same as Example 1.
As shown in fig. 7, second of structure for determining torque knob is as follows：Determining torque knob 12 includes attachment screw 12-1, bullet
Spring 12-2, the first ratchet 12-3, the second ratchet 12-4, knob body 12-5 and sleeve 12-6；Attachment screw 12-1 include with it is micro-
15 fixed connecting shaft of type screw rod, with the first ratchet 12-3 transmission shafts being connected and the connection between connecting shaft and transmission shaft
Block；First ratchet 12-3 is slideably socketed on transmission shaft, and transmission shaft is equipped with the first limited block；First ratchet 12-3 and
Two ratchet 12-4 include wheel teeth portion respectively and sleeve part, the wheel teeth portion of the first ratchet 12-3 and the wheel teeth portion of the second ratchet 12-4 are nibbled
It closes, limiting slot is respectively equipped on the sleeve part of the sleeve part of the first ratchet 12-3 and the second ratchet 12-4；First limited block is inserted into
In the limiting slot of first ratchet 12-3；Knob body 12-5 includes turncap, shaft and the circular gear between turncap and shaft
Block, shaft are equipped with the second limited block, and the second limited block is inserted into the limiting slot of the second ratchet；The link block of attachment screw 12-1
It is connected through a screw thread with sleeve 12-6, spring 12-2 is located between the link block of attachment screw and the first ratchet 12-3, in pressure
Contracting state；The other end of sleeve 12-6 is equipped with the annular retaining ring to extend internally, and rounded stops are located in sleeve 12-6, and turncap is exposed
In sleeve 12-6, rounded stops push against annular retaining ring.
When static demarcating disk does not contact with corrected sensor, when rotating turncap, shaft and its limited block drive the second spine
12-4 rotations are taken turns, since the second ratchet 12-4 is engaged with the first ratchet 12-3, the first ratchet 12-3 follows 12-4 turns of the second ratchet
Dynamic, at this point, transmission shaft and its limited block make attachment screw 12-1 follow rotation, attachment screw 12-1 rotates miniature screw rod 15,
Miniature screw rod 15 is rotated while being translated with corrected sensor to close to the direction of static demarcating disk 22.
When corrected sensor is bonded with static demarcating disk 22, miniature screw rod 15 can not continue to move to.At this point, applied moment
Increase, when the torque that external force generates increases spring 12-2 decrements, the second ratchet 12-4 is slided with respect to the first ratchet 12-3, the
When the gear teeth bottom position of the gear teeth of two ratchet 12-4 from the first ratchet 12-3 slide to highest point, the wheel teeth portion of the first ratchet 12-3 and
The wheel teeth portion of second ratchet 12-4 enters second position of engagement, and spring 12-2 recovers original decrement, the first ratchet 12-3 and
Second ratchet 12-4 is engaged, and sends click sound, and corrected sensor is prompted to be bonded just with static demarcating disk 22.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Scope is not construed as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention is also and in art technology
Personnel conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (7)
1. a kind of current vortex sensor static state automated calibration system, including pedestal, static demarcating disk, for installing corrected sensor
Clamp of sensor, driving static demarcating disk closer or far from corrected sensor driving mechanism and be oriented to static demarcating disk and move
Dynamic guider；Driving mechanism and guider are installed in pedestal, and static demarcating disk is installed on drive by demarcating disc carrier
On motivation structure；It is characterized in that：
Clamp of sensor is fixed on sliding block, and pedestal is equipped with the guide rail of guide runner linear slide, and guide rail uses crossed roller
Guide rail, be equipped on sliding block driving its slide determine torque knob, determine torque knob and be fixedly connected with miniature screw rod, determine torque and revolve
Button is arranged on block, and miniature screw rod is engaged with miniature nut, and miniature nut is fixed on pedestal, and static demarcating disk is propped up by school
During sensor, the idle running of torque knob is determined；
Pedestal is made of pedestal and shell, driving mechanism, guider and two extreme position travel switches be respectively positioned on pedestal with
In the chamber that shell surrounds；Sliding slot is offered on shell, calibration disc carrier is slided in sliding slot；It demarcates between disc carrier and shell
Equipped with the first covering and the second covering, the first covering and the second covering are divided into calibration disc carrier both ends, two screenings
Housing respectively with shell fix by one end, and the other end is fixed with calibration disc carrier；Two coverings are in organ shape respectively：The two of sliding slot
Side is respectively equipped with the guide rail for being oriented to covering stretching motion, and calibration disc carrier is set up between guide rail, demarcates disc carrier and two
Covering is slided between the guide groove of guide rail, and guide rail is Z-shape, and the inner surface of guide rail and shell surrounds guide groove；It is set on pedestal
Grating scale sets grating ruler reading head on link block.
2. current vortex sensor static state automated calibration system as described in claim 1, it is characterised in that：Determining torque knob includes
Knob body, the first ratchet, the second ratchet, attachment screw, spring and sleeve；Attachment screw includes and the fixed company of miniature screw rod
Spindle, the transmission shaft being connected with the first ratchet and the link block between connecting shaft and transmission shaft；First ratchet is slideably
It is socketed on transmission shaft, transmission shaft is equipped with the first limited block；First ratchet and the second ratchet include wheel teeth portion and sleeve respectively
Portion, the wheel teeth portion of the first ratchet are engaged with the wheel teeth portion of the second ratchet, the sleeve part of the sleeve part of the first ratchet and the second ratchet
On be respectively equipped with limiting slot；First limited block is inserted into the limiting slot of the first ratchet；Knob body includes turncap, shaft and is located at
Rounded stops between turncap and shaft, shaft are equipped with the second limited block, and the second limited block is inserted into the limiting slot of the second ratchet
It is interior；The link block of attachment screw is connected through a screw thread with sleeve, and spring is between link block and the first ratchet；Sleeve it is another
End is equipped with the annular retaining ring to extend internally, and rounded stops are located in sleeve, and turncap exposes to sleeve, and rounded stops push against annular gear
Circle.
3. current vortex sensor static state automated calibration system as claimed in claim 1 or 2, it is characterised in that：Pedestal is equipped with
The locking device of fixed slide position, locking device include lock-screw, lock bracket and locking slide plate；Lock bracket is fixed on
On pedestal, lock-screw is arranged in by screw pair on lock bracket, and the head end of lock-screw is equipped with handle, and locking slide plate is fixed
Rounded in the tail end locking slide plate of lock-screw, the tail end of lock-screw exposes to lock bracket；Lock-screw is in first
During position, locking slide plate has gap with sliding block；When lock-screw is in the second position, locking slide plate is pressed in sliding block.
4. current vortex sensor static state automated calibration system as claimed in claim 3, it is characterised in that：Pedestal is equipped with first
Extreme position travel switch and the second extreme position travel switch, static demarcating disk are transported between two extreme position travel switches
It is dynamic.
5. current vortex sensor static state automated calibration system as claimed in claim 4, it is characterised in that：Clamp of sensor includes
Installing plate fixed with sliding block and the stent for installing sensor, stent are lock onto by trip bolt on installing plate；Installation
The second mounting portion on plate for the first mounting portion of mounting plane type sensor and for installing cylinder shape sensor, the first peace
Dress portion includes the T-slot being opened on stent and the T-nut being slidably disposed in T-slot, and T-nut is equipped with screw thread
Hole, T-nut at least two；Planar shaped sensor is fixed by screw and T-nut；Second mounting portion includes being opened in branch
Cylindrical hole on frame, sets bushing between cylinder shape sensor and cylindrical hole, cradle top is equipped with lock sensor
Lock-screw, installing plate be equipped with cylindrical hole contraposition kidney slot, cylinder shape sensor part is located in kidney slot；
The both sides of stent are equipped with L-shaped wing plate, and between stent and L-shaped wing plate, trip bolt is arranged on L-shaped wing plate installing plate.
6. current vortex sensor static state automated calibration system as claimed in claim 5, it is characterised in that：During verification, static state mark
Price fixing and the initial distance of corrected sensor areWherein, δ1It is the starting point of linear sensor active section, δ2It is sensor
The terminal of linear work section, equidistantly symmetrical point centered on the initial position of static demarcating disk of the measurement point of corrected sensor
Cloth.
7. current vortex sensor static state automated calibration system as claimed in claim 6, it is characterised in that：Calibration system, which has, to be passed
Sensor voltage acquisition passage and sensor current acquisition channel, analog switch group selection turn on sensor voltage acquisition passage
And/or sensor current acquisition channel.
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| CN201610161625.5A CN105841732B (en) | 2014-02-13 | 2014-02-13 | A kind of current vortex sensor static state automated calibration system |
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| CN201410049861.9A CN103776481B (en) | 2014-02-13 | 2014-02-13 | The static automated calibration system of a kind of current vortex sensor |
| CN201610161625.5A CN105841732B (en) | 2014-02-13 | 2014-02-13 | A kind of current vortex sensor static state automated calibration system |
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| CN104309793B (en) * | 2014-11-21 | 2016-06-29 | 武汉理工大学 | Adjustable sensor installing platform |
| CN108534650B (en) * | 2018-04-04 | 2019-05-14 | 大连理工大学 | The linearity optimization method of the high-precision calibration of current vortex sensor curve of output |
| CN108636836A (en) * | 2018-05-04 | 2018-10-12 | 江苏羿骏自动化科技有限公司 | A kind of internal thread automatic detection device |
| CN108981893B (en) * | 2018-07-27 | 2023-07-25 | 华电电力科学研究院有限公司 | Dynamic and static characteristic verification bracket and method for electric vortex sensor |
| CN109631738B (en) * | 2018-12-20 | 2020-07-24 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Water film thickness monitoring system and method for water lubricated bearing |
| CN110645872A (en) * | 2019-08-19 | 2020-01-03 | 河南工业和信息化职业学院 | Portable measuring device for mining engineering |
| CN111203759B (en) * | 2020-01-20 | 2021-06-22 | 重庆大学 | On-line calibration device and method for eddy current sensor machine tool |
| CN111506002B (en) * | 2020-05-26 | 2021-07-16 | 国网湖南省电力有限公司 | Thermal power generating unit regulating valve regulating characteristic linearization processing method, system and medium |
| CN113188491B (en) * | 2021-03-16 | 2023-07-25 | 中国科学院高能物理研究所 | Rotary table rotating shaft error measurement and correction method based on displacement sensor |
| CN113074767A (en) * | 2021-03-30 | 2021-07-06 | 宁夏计量质量检验检测研究院 | Eddy current sensor dynamic and static integrated calibrating device |
| CN113074768B (en) * | 2021-03-30 | 2023-05-09 | 宁夏计量质量检验检测研究院 | Dynamic and static continuous calibration method for electric vortex sensor |
| CN114485759B (en) * | 2022-01-25 | 2024-03-01 | 北京航空航天大学宁波创新研究院 | Sensor calibration device and calibration method thereof |
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| CN105841732A (en) | 2016-08-10 |
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