CN107063155B - The initial failure of linear displacement transducer excludes experimental rig - Google Patents
The initial failure of linear displacement transducer excludes experimental rig Download PDFInfo
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- CN107063155B CN107063155B CN201710205095.4A CN201710205095A CN107063155B CN 107063155 B CN107063155 B CN 107063155B CN 201710205095 A CN201710205095 A CN 201710205095A CN 107063155 B CN107063155 B CN 107063155B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/042—Calibration or calibration artifacts
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The initial failure of linear displacement transducer excludes experimental rig and belongs to fault detection technique field, it is therefore intended that solves the problems, such as it is of the existing technology cannot be to linear displacement transducer progress initial failure inspection.The present invention includes failure excitation apparatus, and humiture test box therein is divided into upper layer and lower layer by partition, and shake table is located at humiture test box lower layer, and upper surface extend into upper layer, and frequency-variable controller is fixed on humiture test box upper surface；Positioned at humiture test box upper layer and it is fixed on the total environment erecting bed of shake table upper surface, environment erecting bed includes the identical environment subelement altogether of 2n structures arranged side by side altogether, each environment subelement altogether includes the opposite upper slide and lower skateboard being slidably matched, and two linear displacement transducers are arranged in parallel in upper slide upper surface along upper slide length direction；Driving and the stroke adjusting device that its reciprocating motion is connected and driven with the upper slide of total environment erecting bed, the distance of reciprocal number and movement is measured by movement detecting mechanism.
Description
Technical field
The invention belongs to fault detection technique fields, and in particular to a kind of based on the straight of the adjustable slider-crank mechanism of stroke
The initial failure of linear movement pick-up excludes experimental rig.
Background technique
Linear displacement transducer is a kind of very important displacement measurement sensor, its integrated optical is both mechanically and electrically led
The technology in domain is widely used in one in numerous areas such as radar, robot, numerically-controlled machine tools.As linear displacement transducer is answered
It is also higher and higher to its precision and reliability requirement with the change of range is wide and application field increases.Straight-line displacement passes
The practical service environment of sensor is more severe.Often subject that temperature, humidity, vibration, electromagnetic interference etc. are all multi-environment to answer
The influence of power, in addition defect present in itself manufacture assembly, it is easy to various failures occur.Linear displacement transducer once goes out
Existing failure, has uncertain influence for the operation of complete machine, this influence is possibly even catastrophic.Therefore, to straight
Linear movement pick-up carries out initial failure and excludes test, is had great significance with improving its reliability for society.
Currently, can be less to the device and experimental technique of linear displacement transducer progress initial failure exclusion test.Only
There is the relevant apparatus that exfactory inspection is carried out to linear displacement transducer in small part enterprise.For being specifically imposed by stress to excite its morning
The experimental rig of phase failure still counts blank.Cannot the initial failure to linear displacement transducer carry out inspection exclusion.
Summary of the invention
It is an object of the invention to propose that a kind of initial failure of linear displacement transducer excludes experimental rig, solve existing
The problem of cannot carrying out initial failure inspection to linear displacement transducer existing for technology, by applying to linear displacement transducer
Temperature, humidity, vibration and electromagnetic interference environment stress excite linear displacement transducer initial failure, and then sense to straight-line displacement
Device carries out detection test.
To achieve the above object, the initial failure exclusion experimental rig of linear displacement transducer of the invention includes:
Failure excitation apparatus, the failure excitation apparatus include humiture test box, shake table and frequency-variable controller, described
Humiture test box is divided into two regions, the shake table up and down by the partition of centre setting and is located at the humiture test box
Lower layer, upper surface pass through the partition and extend into upper layer, and the frequency-variable controller is fixed on the humiture test box upper surface,
Humiture test box and shake table are controlled by temperature and humidity case control system and vibration bench control system respectively；
Positioned at humiture test box upper layer and it is fixed on the total environment erecting bed of shake table upper surface, the environment installation altogether
Platform includes the identical environment subelement altogether of 2n structures arranged side by side, and each environment subelement altogether includes opposite is slidably matched
Upper slide and lower skateboard, two linear displacement transducers are arranged in parallel in upper slide upper surface along upper slide length direction, often
Corresponding position is provided with a linear displacement transducer reading head, the linear displacement transducer above a linear displacement transducer
Reading head is fixed on reading head positioning plate, and the side wall of the reading head positioning plate and the lower skateboard is fixed, the lower skateboard
It is fixed on the upper surface of the shake table；
External testing stand on the ground is set；
The driving simultaneously connected with the total environment erecting bed on external testing stand and stroke adjusting device, the drive are set
Dynamic and stroke adjusting device includes the identical driving of n structures arranged side by side and stroke adjustment subelement, each driving and
Stroke adjustment subelement include the main support platform for being fixed on external testing stand upper surface, motion work, slider-crank mechanism,
Movement detecting mechanism and push rod；Two the second parallel guide rails, the motion transmission is arranged in the main support platform along its length
Mechanism drives the second sliding block in two groups of slider-crank mechanisms to move back and forth along two the second guide rails simultaneously, every group of crank block machine
Structure is fixedly connected by one end of a push rod and the upper slide length direction of a total environment subelement, a movement inspection
The distance of second sliding block of survey mechanism one slider-crank mechanism of acquisition reciprocal number and movement；N driving and stroke adjustment
The power intake of the motion driving mechanism of subelement is sequentially connected by yielding coupling, and is driven and transported by servo motor
Dynamic, servo motor is connect with frequency-variable controller；
And control system, the control system respectively with linear displacement transducer reading head, movement detecting mechanism and change
The connection of frequency controller.
The upper slide and lower skateboard are slidably matched specifically: there are two the lower skateboard upper surface is arranged along its length
The first parallel guide rail, each first guide rail and first sliding block are slidably matched, first upper end of slide block face and upper slide
Lower end surface be fixedly connected.
Described two linear displacement transducers are arranged in parallel in upper slide upper surface along upper slide length direction specifically: institute
It states upper slide upper surface to be arranged along its length there are two locating slot, there are two the interior settings of each locating slot slides limited block, institute
It states sliding limited block and the locating slot is slidably matched, and fixed by puller bolt, linear displacement transducer setting is positioning
In slot, both ends pass through sliding limited block limit.
The motion work includes:
Big driving wheel, the big driving wheel and rear axle are connected by key, and the rear axle is connected with back seat by bearing, described
Back seat is fixed on main support platform；
The middle runner connected with the big driving wheel by belt, the middle runner and front axle are connected by key, before described
Axis is connected with front stall by bearing, and the front stall is fixed on main support platform；
And the two small driving wheels connected with the interference of front axle both ends, each small driving wheel and slider-crank mechanism
Crank connection；
The rear axle of n driving and the motion work in stroke adjustment subelement is sequentially connected by yielding coupling,
Rear axle positioned at side is connected by yielding coupling with servo motor.
The slider-crank mechanism includes:
Fixed arm, the fixed arm are provided with elongated slot along its length, and one end cap of fixed arm is in motion work
Front axle end, and be fixed by screws on small driving wheel, the end of the front axle is connected with shaft end limit block；
The telescopic arm that the elongated slot of one end and the fixed arm is slidably matched, described telescopic arm one end are provided with itself vertical axis
The through-hole of line, the positive locking plate with long axis passes through the elongated slot of fixed arm and secondary locking plate is threadedly coupled, and clamp or release is fixed
Arm, the long axis of the positive locking plate passes through the through-hole of telescopic arm end and stop nut is threadedly coupled, the telescopic arm end
The long axis of through-hole and the positive locking plate is rotatably assorted；
The forearm being slidably matched with the telescopic arm other end, the forearm are hollow structure, side wall relative position length
Direction is opened there are two notch, and the telescopic arm is deep into forearm, and the screwed ears lock sleeve of ears and telescopic arm go deep into
Welded to one end of antetheca, the ears of ears lock sleeve are stretched out from the two sides notch of forearm, and respectively with a locking wheel screw thread
The locking or release of telescopic arm and forearm relative position are realized in connection；
The reflecting target bracket being connected by a hinge with the forearm other end, the one of the reflecting target bracket and the push rod
End is fixedly connected；
And the second sliding block being fixedly connected with the reflecting target bracket, second on second sliding block and main support platform
Guide rail is slidably matched.
The movement detecting mechanism includes:
The reflecting target being fixed on reflecting target bracket, the reflecting target and the direction of motion are vertical；
The laser range finder being mounted on main support platform, the measuring head of the laser range finder and the reflecting target are opposite,
The laser range finder and control system electrical connection；
And it is mounted on the reciprocal counter of main support platform front end, push rod passes through the measurement port of the reciprocal counter,
The reciprocal counter and control system electrical connection.
The value of the n is 4.
A damper is provided on each push rod.
The humiture test box upper layer passes through closing door termination.
It is sealed between partition in the shake table upper surface and humiture test box with temperature insulating material.
The operation principle of the present invention is that: power supply is opened, humiture test box and shake table, temperature and humidity case control system are started
It is in Wait Order state with vibration bench control system, setting needs environmental stress conditions to be loaded, opens servo motor and frequency conversion
Controller after suitable rotary speed parameter is arranged, carries out initial failure and excludes test, the power of servo motor passes through rear axle and bearing
It passes to each driving and stroke adjustment subelement, big driving wheel imparts power to middle runner by belt, middle runner passes through
Power is forwarded to small driving wheel by front axle.The slider-crank mechanism of fixed arm, telescopic arm and forearm composition turns small driving wheel
Dynamic to move the reciprocating motion for being converted into push rod, push rod drives the movement of environment erecting bed upper slide altogether, to drive straight-line displacement
The reciprocating motion of sensor blade.The relative position conduct of real-time measurement reflecting target relative laser rangefinder in reciprocatory movement
The calibration value of corresponding linear displacement transducer relative motion moves back and forth number by reciprocal counter measures.
The invention has the benefit that
1, the initial failure exclusion experimental rig of linear displacement transducer of the invention is able to achieve to different length straight line position
The simultaneous test of displacement sensor, designed driving and stroke adjusting device can be according to the actual (tube) lengths of tested linear displacement transducer
Degree, adjusts the brachium of slider-crank mechanism, to meet the test trip of corresponding length linear displacement transducer.The present invention designs altogether
Four independent drivings and stroke adjustment subelement, each driving and stroke adjustment subelement can be simultaneously to two different lengths
Linear displacement transducer is tested.Once mounting can test the linear displacement transducer of 16 different lengths simultaneously, test
It is high-efficient；
2, the present invention fully considers the designed reliability of device, driving device and failure excitation apparatus is separated, master trip
Platform is placed in outside temperature and humidity case, and the environmental stress being applied on linear displacement transducer is avoided accidentally to act on Master Test Station, is improved
Service using life.Designed total environment erecting bed is exclusively used in installing fixed tested straight line position under temperature and humidity and vibration environment
Displacement sensor.
3, present invention design fully considers maintenance accessi bility, and using modularized design, four drivings and stroke adjustment are single
First independent operating, each driving and stroke adjustment subelement drive two linear displacement transducer operations.If there is some driving
And to meet failure impaired for stroke adjustment subelement, can individually dismantle maintenance, does not influence other and drives and stroke adjustment subelement
Operation test.
4, the calibration value that the higher laser displacement sensor of service precision of the present invention is displaced as linear displacement transducer, it is right
Than the output valve of linear displacement transducer, to analyze and determine that linear displacement transducer has fault-free.The reciprocal counting sensing of installation
Device can record the reciprocal time of linear displacement transducer reading head, refine test data, mention for the Data Analysis Services in later period
For basis.
5, high performance humiture test box and shake table used herein are as failure excitaton source, to tested straight line position
The environmental stress of displacement sensor application various dimensions.Frequency converter simulates complicated work in actual use as electromagnetic interference equipment
Condition.Simple mechanical slider-crank mechanism reliability is higher, improves the service life of testing stand itself.
Detailed description of the invention
Fig. 1 is that the initial failure of linear displacement transducer of the invention excludes axonometric drawing when experimental rig hides closing door；
Fig. 2 is that the initial failure of linear displacement transducer of the invention excludes experimental rig axonometric drawing；
Fig. 3 is that failure excitation apparatus structure is shown in the initial failure exclusion experimental rig of linear displacement transducer of the invention
It is intended to；
Fig. 4 is that the initial failure of linear displacement transducer of the invention excludes driving and stroke adjusting device in experimental rig
With total environment erecting bed overall structure diagram；
Fig. 5 is that environment sub-unit structure shows altogether in the initial failure exclusion experimental rig of linear displacement transducer of the invention
It is intended to；
Fig. 6 is that the initial failure of linear displacement transducer of the invention excludes to drive in experimental rig and stroke adjustment is single
Meta structure schematic diagram；
Fig. 7 is that the initial failure of linear displacement transducer of the invention excludes to drive in experimental rig and stroke adjustment is single
First part explosive view；
Wherein: 1, humiture test box, 2, shake table, 3, temperature and humidity case control system, 4, vibration bench control system, 5, change
Frequency controller, 6, external testing stand, 7, driving and stroke adjusting device, 8, total environment erecting bed, 9, servo motor, 10, damping
Device, 11, main support platform, 12, laser range finder, 13, reciprocal counter, 14, push rod, the 15, second guide rail, 16, reflecting target, 17,
Reflecting target bracket, 18, hinge, the 19, second sliding block, 20, forearm, 21, locking wheel, 22, telescopic arm, 23, stop nut, 24, pair
Locking plate, 25, fixed arm, 26, positive locking plate, 27, shaft end limit block, 28, screw, 29, small driving wheel, 30, middle runner, 31,
Front stall, 32, belt, 33, big driving wheel, 34, upper slide, 35, sliding limited block, 36, linear displacement transducer, 37, straight line position
Displacement sensor reading head, 38, reading head positioning plate, the 39, first guide rail, 40, lower skateboard, the 41, first sliding block, 42, back seat, 43,
Rear axle, 44, ears lock sleeve, 45, front axle, 46, yielding coupling.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
Referring to attached drawing 1- attached drawing 4, the initial failure of linear displacement transducer of the invention excludes experimental rig and includes:
Failure excitation apparatus, the failure excitation apparatus include humiture test box 1, shake table 2 and frequency-variable controller 5,
The humiture test box 1 is divided into two regions, the shake table 2 up and down by the partition of centre setting and is located at the temperature and humidity
1 lower layer of chamber, upper surface pass through the partition and extend into upper layer, and the frequency-variable controller 5 is fixed on the Humidity Test
1 upper surface of case controls humiture test box 1 and shake table by temperature and humidity case control system 3 and vibration bench control system 4 respectively
2；1 upper layer of humiture test box passes through closing door termination；In 2 upper surface of shake table and humiture test box 1 every
It is sealed between plate with temperature insulating material；The humiture test box 1 uses the damp and hot combined test chamber of THV-600-A high/low temperature, temperature
Partition in humid test case 1 is equipped with through-hole, and through-hole diameter is greater than 2 upper surface of shake table.Chamber lower layer is for placing vibration
Dynamic platform 2, upper layer are 0.6m for placing total environment erecting bed 8, upper layer swept volume3, temperature regulating range is -40 degree~150
Degree, humidity control range are 20%~98%RH, and humiture test box 1 is swashed by temperature, humidity, temperature change, humidity variation
Send out all kinds of failures of linear displacement transducer 36；The shake table 2 uses DC-600-6 electric vibration table 2, the volume of shake table 2
Fixed sine thrust is 6KN, peak acceleration 980m/s2, maximum load 200kg.Shake table 2 is for exciting because vibration causes
All kinds of failures of linear displacement transducer 36；The frequency-variable controller 5 is the frequency converter of servo motor 9, mainly there is two aspects
Function.One is the speed control unit as motor, on the other hand, the electromagnetic interference as linear displacement transducer 36 fill
It sets and electromagnetic interference stress is applied to tested linear displacement transducer 36；
Positioned at 1 upper layer of humiture test box and it is fixed on the total environment erecting bed 8 of 2 upper surface of shake table, the environment altogether
Erecting bed 8 includes the identical environment subelement altogether of eight structures arranged side by side, and each environment subelement altogether includes relatively sliding
The upper slide 34 and lower skateboard 40 of dynamic cooperation, two linear displacement transducers 36 are arranged in parallel in along 34 length direction of upper slide
34 upper surface of slide plate, each 36 top corresponding position of linear displacement transducer are provided with a linear displacement transducer reading head
37, the linear displacement transducer reading head 37 is fixed on reading head positioning plate 38, the reading head positioning plate 38 and described
The side wall of lower skateboard 40 is fixed, and mounting hole is provided on the lower skateboard 40, and 2 upper surface of shake table is also equipped with installation
Lower skateboard 40 is fixed on the upper surface of the shake table 2 across the mounting hole of the lower skateboard 40 and shake table 2 by hole, bolt；
External testing stand 6 on the ground is set；
Be arranged on external testing stand 6 and and the driving that environment erecting bed 8 connects described altogether and stroke adjusting device 7, institute
Stating driving and stroke adjusting device 7 includes the identical driving of four structures arranged side by side and stroke adjustment subelement, each described
Driving and stroke adjustment subelement include main support platform 11, motion work, the crank for being fixed on external 6 upper surface of testing stand
Slide block mechanism, movement detecting mechanism and push rod 14；Two the second parallel guide rails are arranged in the main support platform 11 along its length
15, the motion work drives the second sliding block 19 in two groups of slider-crank mechanisms reciprocal along two the second guide rails 15 simultaneously
Movement, one end that every group of slider-crank mechanism passes through a push rod 14 and 34 length direction of upper slide of a total environment subelement
It is fixedly connected, the second sliding block 19 that a movement detecting mechanism acquires a slider-crank mechanism reciprocal number and movement
Distance；The power intake of the motion driving mechanism of four drivings and stroke adjustment subelement passes through yielding coupling 46 successively
Connection, and by the driving movement of servo motor 9, servo motor 9 and frequency-variable controller 5 connect, and servo motor 9 is by frequency-variable controller
5 control revolving speeds；
And control system, the control system respectively with linear displacement transducer reading head 37, movement detecting mechanism and
Frequency-variable controller 5 connects.
1 control system of humiture test box in the present invention includes temperature sensor, capacitive humidity sensor and UMC1200
Controller.
The temperature sensor is SUS304 armouring twin-core Pt100 sensor, to measure the temperature inside the box.
The humidity sensor is Finland VAISALA capacitance type humidity sensor, is used to Relative Humidity Measuring.
The UMC1200 controller, is equipped with 32 railway digital I/O modules and I/O module is simulated on 2 tunnels, has 9th area high-precision
PID arithmetic function, can carry out 3 kinds of Self-tuning Systems, and automatic operation obtains best PID control coefficient.RJ45 interface realize controller with
The connection of detection device ensure that the real-time Transmission of data, realize Centralized Monitoring.
The vibration bench control system 4 is RC-2000 vibrating controller, and distributed architecture is used in design, and
Use Low-noise Design Technology, floating number filtering technique and 24 bit resolution ADC/DAC.
Referring to attached drawing 5, the upper slide 34 and lower skateboard 40 are slidably matched specifically: 40 upper surface of lower skateboard is along length
Direction setting is spent there are two the first parallel guide rail 39, and each first guide rail 39 and first sliding block 41 are slidably matched, described
First sliding block, 41 upper surface is fixedly connected with the lower end surface of upper slide 34.
Described two linear displacement transducers 36 are arranged in parallel in 34 upper end mask of upper slide along 34 length direction of upper slide
Body are as follows: 34 upper surface of upper slide is arranged along its length there are two locating slot, sliding that there are two the interior settings of each locating slot
Limited block 35, the sliding limited block 35 and the locating slot are slidably matched, and are fixed by puller bolt, straight-line displacement sensing
Device 36 is arranged in locating slot, and both ends are limited by sliding limited block 35, and the data line of linear displacement transducer 36 is from reading head
String holes on positioning plate 38 picks out.
When carrying out the exclusion test of 36 initial failure of linear displacement transducer, linear displacement transducer reading head 37 and reading head
Positioning plate 38 and lower skateboard 40 are relatively fixed in failure excitation apparatus.Upper slide 34 under the push rod 14 of connection acts on before realizing
After move back and forth, while the blade of linear displacement transducer 36 being driven to move reciprocatingly.The reading head of linear displacement transducer 36
It does relatively reciprocating motion relative to blade.
Referring to attached drawing 6 and attached drawing 7, the motion work includes:
Big driving wheel 33, the big driving wheel 33 and rear axle 43 are connected by key, and the rear axle 43 and back seat 42 pass through axis
Connection is held, the back seat 42 is fixed on main support platform 11；
Pass through the middle runner 30 that belt 32 connects, the middle runner 30 and front axle 45 with the big driving wheel 33 to connect by key
It connects, the front axle 45 is connected with front stall 31 by bearing, and the front stall 31 is fixed on main support platform 11；
And the two small driving wheel 29 connected with 45 both ends interference of front axle, each small driving wheel 29 and a crank block
The crank of mechanism connects；
The rear axle 43 of four drivings and the motion work in stroke adjustment subelement passes through yielding coupling 46 successively
Connection, the rear axle 43 positioned at side are connected by yielding coupling 46 and servo motor 9.
The slider-crank mechanism includes:
Fixed arm 25, the fixed arm 25 are provided with elongated slot along its length, and 25 1 end cap of fixed arm is in motion transmission
45 end of front axle of mechanism, and be fixed on small driving wheel 29 by screw 28, the end of the front axle 45 and shaft end limit block
27 connections；
The telescopic arm 22 that the elongated slot of one end and the fixed arm 25 is slidably matched, described 22 one end of telescopic arm are provided with vertically
The through-hole of own axes, the positive locking plate 26 with long axis passes through the elongated slot of fixed arm 25 and secondary locking plate 24 is threadedly coupled, folder
Tight or release fixed arm 25, the long axis of the positive locking plate 26 passes through the through-hole of 22 end of telescopic arm and 23 screw thread of stop nut connects
It connects, the through-hole of 22 end of telescopic arm and the long axis of the positive locking plate 26 are rotatably assorted；In the state of not tightening, just
Locking plate 26 and secondary tight disk can freely adjust the position in elongated slot, in the locked condition, positive locking plate 26 and secondary tight disk two
Side is adjacent to the side section of fixed arm 25, and positive locking plate 26 and secondary tight disk two sides all use friction material, constitute locking state；
The forearm 20 being slidably matched with 22 other end of telescopic arm, the forearm 20 are hollow structure, and side wall is with respect to position
It sets length direction to open there are two notch, the telescopic arm 22 is deep into forearm 20, the screwed ears lock sleeve 44 of ears
One end welding of antetheca is deep into telescopic arm 22, the ears of ears lock sleeve 44 are stretched out from the two sides notch of forearm 20, and point
It is not threadedly coupled with a locking wheel 21, realizes the locking or release of telescopic arm 22 and 20 relative position of forearm；Locking wheel 21 is twisted
Next, locking wheel 21 and 20 contact portion of forearm generate frictional force, cause telescopic arm 22 and forearm 20 relatively fixed；
Pass through the reflecting target bracket 17 that connects of hinge 18 with 20 other end of forearm, the reflecting target bracket 17 and described
One end of push rod 14 is fixedly connected, and a damper 10 is provided on each push rod 14；The forearm 20 and the reflecting target 16
Between connected by hinge 18, so far, power passes to middle runner 30 by big driving wheel 33, then has front axle 45 to pass to small driving
Wheel 29.The rotational motion of small driving wheel 29 is converted into the reciprocal of reflecting target bracket 17 by fixed arm 25, telescopic arm 22 and forearm 20
Movement, then total environment erecting bed 8 is connected to by push rod 14, realize the reciprocating motion of linear displacement transducer 36.Meanwhile fixed arm
25 all can adjust with telescopic arm 22, telescopic arm 22 and the relative position of forearm 20, so that crank block different trips are achieved；
And the second sliding block 19 being fixedly connected with the reflecting target bracket 17, second sliding block 19 and main support platform 11
On the second guide rail 15 be slidably matched.
The movement detecting mechanism includes:
The reflecting target 16 being fixed on reflecting target bracket 17, the reflecting target 16 are vertical with the direction of motion；
The laser range finder 12 being mounted on main support platform 11, the measuring head of the laser range finder 12 and the reflecting target
16 is opposite, the laser range finder 12 and control system electrical connection；
And it is mounted on the reciprocal counter 13 of 11 front end of main support platform, push rod 14 passes through the survey of the reciprocal counter 13
Measure port, the reciprocal counter 13 and control system electrical connection.
Control system of the invention includes: control cabinet and the PLC in control cabinet, industrial personal computer, data collecting card, frequency conversion
Controller 5 and power supply；
The PLC downstream end and laser range finder 12, reflecting target 16, reciprocal counter 13, UMC1200 controller, RC-
2000 vibrating controllers, frequency-variable controller 5, power supply connection.1 control system of humiture test box and humiture test box 1
Connection, 2 controller of shake table are connect with shake table 2, the power interface and encoder interfaces of frequency-variable controller 5 and servo motor 9
Connection, power supply are that tested linear displacement transducer 36 provides power supply.
The PLC upstream ends are connect with upper industrial personal computer, installation data capture card in industrial personal computer, and upper computer software is selected
Labview, temperature value, humidity value, temperature acceleration value, the humidity acceleration of software display interface integrative display temperature and humidity case
Value, the travel. value of the vibration values of shake table 2, laser range finder 12 and reflecting target 16, reciprocal sensor for countering umber of reciprocation
Value.The settable temperature variation of control interface, humidity variable quantity, the vibratory output of shake table 2.
The initial failure of linear displacement transducer 36 of the invention excludes the specific installation process of experimental rig are as follows: first will be straight
Linear movement pick-up 36 is installed in total environment erecting bed 8, and 36 blade of linear displacement transducer, which is positioned on upper slide 34, to be determined
In the slot of position, 36 blade both ends of linear displacement transducer are fixed by sliding limited block 35.It is straight according to corresponding length to slide limited block 35
After linear movement pick-up 36 adjusts good position, it is fixedly connected with bolt with upper slide 34.
The reading head of linear displacement transducer 36 is fixed on reading head positioning plate 38, the data of linear displacement transducer 36
Line is picked out from the string holes in reading head fixed plate.
After after linear displacement transducer 36, environment erecting bed 8 is fixedly connected together, by total environment erecting bed 8 installation to temperature
In humid test case 1, the main through-hole being arranged by 40 bottom end of erecting bed lower skateboard uses screw 28 and 2 table top phase of shake table
Connection, is allowed to be fixed in temperature and humidity case.
According to corresponding length linear displacement transducer 36, its corresponding driving and stroke adjusting device 7 are adjusted.It unclamps first
Positive locking plate 26 and secondary locking plate 24, adjust telescopic arm 22 and opposite position of 25 connecting portion of fixed arm in 25 elongated slot of fixed arm
It sets.After the completion of adjustment, positive locking plate 26 and secondary locking plate 24 are tightened, positive locking plate 26 and 24 two sides of secondary locking plate are all using friction
Property material and be adjacent to fixed arm 25 side section, constitute locking state, at this point, telescopic arm 22 can be in relatively fixed position around fixation
Arm 25 rotates.
Push rod 14 is installed, environment erecting bed 8 altogether and driving and stroke adjusting device 7 are connected.
Initial failure exclusion is carried out due to different length for the linear displacement transducer 36 of different brands, different model
When test, each 36 reciprocating stroke of linear displacement transducer is different.It is long that the present apparatus is suitable for different linear displacement transducers 36
Each opposite sex is spent, realizes that, to different brands, the linear displacement transducer 36 of different model carries out initial failure simultaneously and excludes test.This
Invention design a kind of structure that movement travel adjusting can be carried out according to the specific length model of linear displacement transducer 36, it can be achieved that
It is tested while to 16 different length linear displacement transducers 36.
Claims (8)
1. the initial failure of linear displacement transducer excludes experimental rig characterized by comprising
Failure excitation apparatus, the failure excitation apparatus include humiture test box (1), shake table (2) and frequency-variable controller
(5), the humiture test box (1) is divided into two regions, the shake table (2) up and down by the partition of centre setting and is located at institute
Humiture test box (1) lower layer is stated, upper surface passes through the partition and extend into upper layer, and the frequency-variable controller (5) is fixed on institute
Humiture test box (1) upper surface is stated, passes through temperature and humidity case control system (3) and vibration bench control system (4) control temperature respectively
Humid test case (1) and shake table (2)；
Positioned at humiture test box (1) upper layer and it is fixed on the total environment erecting bed (8) of shake table (2) upper surface, the ring altogether
Border erecting bed (8) includes the identical environment subelement altogether of 2n structures arranged side by side, and each environment subelement altogether includes phase
To the upper slide (34) and lower skateboard (40) being slidably matched, two linear displacement transducers (36) are along upper slide (34) length direction
It is arranged in parallel in upper slide (34) upper surface, corresponding position is provided with a straight line position above each linear displacement transducer (36)
Displacement sensor reading head (37), the linear displacement transducer reading head (37) is fixed on reading head positioning plate (38), described
The side wall of reading head positioning plate (38) and the lower skateboard (40) is fixed, and the lower skateboard (40) is fixed on the shake table (2)
Upper surface；
External testing stand (6) on the ground is set；
The driving simultaneously connected with described total environment erecting bed (8) and stroke adjusting device (7) are set on external testing stand (6),
The driving and stroke adjusting device (7) include the identical driving of n structures arranged side by side and stroke adjustment subelement, Mei Gesuo
It states driving and stroke adjustment subelement includes main support platform (11), the motion transmission machine for being fixed on external testing stand (6) upper surface
Structure, slider-crank mechanism, movement detecting mechanism and push rod (14)；The main support platform (11) is arranged two in parallel along its length
The second guide rail (15), the motion work simultaneously drive two groups of slider-crank mechanisms in the second sliding block (19) along two
Second guide rail (15) moves back and forth, the upper cunning that every group of slider-crank mechanism passes through a push rod (14) and a total environment subelement
One end of plate (34) length direction is fixedly connected, and the second of one slider-crank mechanism of a movement detecting mechanism acquisition is sliding
The distance of block (19) reciprocal number and movement；The power input of the motion driving mechanism of n driving and stroke adjustment subelement
End is sequentially connected by yielding coupling (46), and passes through servo motor (9) driving movement, servo motor (9) and frequency control
Device (5) connection；
And control system, the control system respectively with linear displacement transducer reading head (37), movement detecting mechanism and change
Frequency controller (5) connection；
The upper slide (34) and lower skateboard (40) are slidably matched specifically: lower skateboard (40) upper surface is set along its length
It sets there are two parallel the first guide rail (39), each first guide rail (39) and first sliding block (41) are slidably matched, and described the
One sliding block (41) upper surface is fixedly connected with the lower end surface of upper slide (34)；
The motion work includes:
Big driving wheel (33), the big driving wheel (33) and rear axle (43) are connected by key, the rear axle (43) and back seat (42)
It is connected by bearing, the back seat (42) is fixed on main support platform (11)；
Pass through the middle runner (30) that belt (32) connect with the big driving wheel (33), the middle runner (30) and front axle (45) are logical
Key connection is crossed, the front axle (45) is connected with front stall (31) by bearing, and the front stall (31) is fixed on main support platform (11)；
And the two small driving wheel (29) connected with front axle (45) both ends interference, each small driving wheel (29) and a slide crank
The crank of block mechanism connects；
The rear axle (43) of n driving and the motion work in stroke adjustment subelement is successively connected by yielding coupling (46)
It connects, the rear axle (43) positioned at side is connected by yielding coupling (46) and servo motor (9).
2. the initial failure of linear displacement transducer according to claim 1 excludes experimental rig, which is characterized in that described
Two linear displacement transducers (36) are arranged in parallel in upper slide (34) upper surface along upper slide (34) length direction specifically: institute
It states upper slide (34) upper surface to be arranged along its length there are two locating slot, there are two the interior settings of each locating slot slides limited block
(35), the sliding limited block (35) and the locating slot are slidably matched, and are fixed by puller bolt, linear displacement transducer
(36) it is arranged in locating slot, both ends pass through sliding limited block (35) limit.
3. the initial failure of linear displacement transducer according to claim 1 excludes experimental rig, which is characterized in that described
Slider-crank mechanism includes:
Fixed arm (25), the fixed arm (25) are provided with elongated slot along its length, and (25) one end cap of fixed arm is passed in movement
Front axle (45) end of motivation structure, and being fixed on small driving wheel (29) by screw (28), the end of the front axle (45) and
Shaft end limit block (27) connection；
The telescopic arm (22) that the elongated slot of one end and the fixed arm (25) is slidably matched, described telescopic arm (22) one end are provided with vertical
The through-hole of straight own axes, the positive locking plate (26) with long axis pass through the elongated slot and secondary locking plate (24) screw thread of fixed arm (25)
Connection, clamp or release fixed arm (25), the long axis of the positive locking plate (26) pass through the through-hole and limit of telescopic arm (22) end
Position nut (23) is threadedly coupled, and the through-hole of telescopic arm (22) end and the long axis of the positive locking plate (26) are rotatably assorted；
The forearm (20) being slidably matched with the telescopic arm (22) other end, the forearm (20) are hollow structure, and side wall is opposite
Position length direction is opened there are two notch, and the telescopic arm (22) is deep into forearm (20), the screwed ears lock of ears
Fixed (44) and telescopic arm (22) are deep into one end welding of antetheca, the two sides of the ears of ears lock sleeve (44) from forearm (20)
Notch stretches out, and is threadedly coupled respectively with a locking wheel (21), realizes the lock of telescopic arm (22) and forearm (20) relative position
Tight or release；
With the forearm (20) other end pass through hinge (18) connect reflecting target bracket (17), the reflecting target bracket (17) and
One end of the push rod (14) is fixedly connected；
And the second sliding block (19) being fixedly connected with the reflecting target bracket (17), second sliding block (19) and main support platform
(11) the second guide rail (15) on is slidably matched.
4. the initial failure of linear displacement transducer according to claim 3 excludes experimental rig, which is characterized in that described
Movement detecting mechanism includes:
The reflecting target (16) being fixed on reflecting target bracket (17), the reflecting target (16) and the direction of motion are vertical；
The laser range finder (12) being mounted on main support platform (11), the measuring head and the reflection of the laser range finder (12)
Relatively, the laser range finder (12) and control system are electrically connected target (16)；
And it is mounted on the reciprocal counter (13) of main support platform (11) front end, push rod (14) passes through the reciprocal counter (13)
Measurement port, the reciprocal counter (13) and the control system electrical connection.
5. according to claim 1, the initial failure of linear displacement transducer described in 3 or 4 excludes experimental rig, feature exists
In the value of the n is 4.
6. the initial failure of linear displacement transducer according to claim 1 excludes experimental rig, which is characterized in that each
A damper (10) is provided on push rod (14).
7. the initial failure of linear displacement transducer according to claim 1 excludes experimental rig, which is characterized in that described
Humiture test box (1) upper layer passes through closing door termination.
8. the initial failure of linear displacement transducer according to claim 1 excludes experimental rig, which is characterized in that described
It is sealed between partition in shake table (2) upper surface and humiture test box (1) with temperature insulating material.
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| CN109030952B (en) * | 2018-08-09 | 2022-04-29 | 中国电力科学研究院有限公司 | Mandrel volume resistivity measuring equipment for insulator |
| CN111157267A (en) * | 2020-01-03 | 2020-05-15 | 江苏大学 | Detection device and detection method for vortex spring type constant tension compensation device |
| CN114111668A (en) * | 2021-12-07 | 2022-03-01 | 北京蔚海明祥科技有限公司 | Be used for stay-supported displacement sensor reliability cycle testing arrangement |
| CN114485514A (en) * | 2021-12-31 | 2022-05-13 | 北京航天益森风洞工程技术有限公司 | Life test bed and life test method for displacement sensor |
| CN115406391B (en) * | 2022-11-01 | 2023-02-28 | 四川中科川信科技有限公司 | Array type deep displacement meter |
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