CN107014298A - A kind of motor synchronizing bar code displacement transducer and its measuring method - Google Patents

A kind of motor synchronizing bar code displacement transducer and its measuring method Download PDF

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Publication number
CN107014298A
CN107014298A CN201710391490.6A CN201710391490A CN107014298A CN 107014298 A CN107014298 A CN 107014298A CN 201710391490 A CN201710391490 A CN 201710391490A CN 107014298 A CN107014298 A CN 107014298A
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China
Prior art keywords
bar code
reading
striped
tape
displacement
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CN201710391490.6A
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CN107014298B (en
Inventor
徐传仁
王汉兵
陈彬
周金波
杨艳娟
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Wuhan Jingcishan Mechanical and Electrical Manufacturing Co Ltd
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Wuhan Jingcishan Mechanical and Electrical Manufacturing Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/02Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/022Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of tv-camera scanning

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  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The invention discloses a kind of new absolute type motor synchronizing bar code displacement transducer and its measuring method, there is specific one-dimensional bar code tape including one, one reading plotter is towards the reading box of specific one-dimensional bar code, and reading box is relatively moved with tape to carry out the coding reading of absolute location information to measure absolute location information;The coding reads sensor and is based on intelligent image treatment technology and striped differential principle, by the coding containing absolute location information, expressed using specific one-dimensional bar code, and read by reading box, it can accurately measure the displacement and absolute position values of object, almost the unrestricted tape is flexible tape to its range, straight line or curvilinear path can be followed to install, the contactless friction of relative motion, read gap adaptive, code length can be widely applied to the fields such as water conservancy and hydropower, industrial and mining enterprises, communications and transportation, environmental protection, war industry equipment almost without limitation.

Description

A kind of motor synchronizing bar code displacement transducer and its measuring method
Technical field
The present invention relates to a kind of new absolute type motor synchronizing bar code displacement transducer and its measuring method, belong to instrument Non-contact displacement transducer and its new measuring method in field of instrumentation technology.
Background technology
In Modern Water Conservancy engineering, the displacement sensor device of measurement gatage has a variety of forms, can substantially divide such as Lower three kinds:Wire rope rotating encoder, black ceramic piston rod add CMS stroke detections, the contactless displacement transducer of rigidity.
Wire rope rotating encoder displacement sensor device is product ripe earliest in hydraulic engineering, and it utilizes steel wire rope Roller girth measures the length and distance of object, and its main building block is rotary encoder, constant force spring, steel wire rope and volume Cylinder.Installation of the steel wire rope sensor on gate oil cylinder is divided into built-in and external.Built-in operation principle is to use steel wire Rope is as driving member, and one end is connected with cylinder piston rod, and the other end is wrapped on reel, and Mainspring type constant force bullet is housed on reel Spring, control steel wire rope is stretched back and forth with the piston movement of piston rod, and gatage is exported on the rotary encoder of reel connecting shaft Data.Which has the disadvantage maintenance trouble, once there is spring backrush power deficiency, steel wire rope, which is pulled off, to be pulled in oil cylinder Wall, not only needs more emat sensor in itself, especially needs detachable maintaining oil cylinder, costly.Although external steel wire rope sensor is tieed up Repair conveniently, but its is affected by environment larger, when especially in steel wire rope encroached water, water impact, floater, water-ice freeze etc. Factor causes measurement to be obstructed.
Black ceramic CMS device for detecting distance of travel small volumes, are combined installed in oil cylinder outer front end with black ceramic piston rod Portion.His operation principle is that piston rod has done quarter ring cutting pretreatment before ceramic coated, and CMS device for detecting distance of travel is by adopting Collect the pulse signal of these annular grooves movement to determine stroke.Black ceramic CMS device for detecting distance of travel shortcomings are that it is incremental Coding, needs to detect since zero-bit again, this is a major defect in commercial Application environment after power-off.
The contactless displacement transducer of rigidity is common for magnetostrictive technology, such sensor mostly using built-in, its Principle is that waveguide moves in magnetic field and sends electric signal to determine displacement.This kind of sensor shortcoming has:Detect that length is longer, Error is bigger, and current stroke detection is mostly in 5 meters, and stroke is long also restricted to cylinder efficient state, oil cylinder excessively level Waveguide can be caused to be worn and torn because of amount of deflection, shorten the service life of sensor, later maintenance is inconvenient.
The content of the invention
The technical problem to be solved in the present invention is, for the above-mentioned use defect of prior art, proposes a kind of new nothing Contact motor synchronizing bar code displacement transducer, realizes that absolute position is read, is not afraid of power down;While theoretical code infinite in length System, can be used for rigidity measurement can be used for flexible measuring, and reading accuracy is high, it is possible to achieve the reading of big stroke and microspur; Applicability is wide.
On this basis, the present invention is further to provide a kind of measuring method, based on intelligent image treatment technology and bar Line differential principle, the coding containing absolute location information is expressed using specific one-dimensional bar code, and is read by reading box Take, can accurately measure the displacement and absolute position values of object, its range is almost unrestricted, and reading accuracy is high.
The present invention is in order to solve the above technical problems, adopt the following technical scheme that:
A kind of motor synchronizing bar code displacement transducer, including tape and moveable reading head;Reading head is separated by with tape Set and include camera device, it is characterised in that:Tape is arranged to camera device towards the surface of camera device to be recognized Specific one-dimensional bar code;The specific one-dimensional bar code, be in tape length range it is continuously distributed it is a plurality of it is chequered with black and white, The many bar codes that width differs be arranged parallel to each other composition fixed number position, non-duplicate rolling absolute coding, every bar shaped code length Degree is matched with camera device view-finder size.
Further, display screen, function button, microUSB data-interfaces, signal lamp are also set up on reading head, is read Several lower surfaces set the camera device, and reading head is fixed in the mobile device with test system displacement synchronous or directly solid It is scheduled in test system;Tape is arranged in the fixed component of tested displacement machine device, and length direction is moved with Kinematic part Direction is consistent.
Further, camera device remains parallel along direction where tape length surface with tape, and camera device is read Moving direction is consistent with tape length direction during code.
Further, the specific one-dimensional bar code, the minimum unusual fluctuation of coding is at intervals of two bar code centers of arbitrary neighborhood Axis spacing, coding theory displacement resolution is corresponding with this spacing;The rolling absolute coding, i.e. camera device view-finder are being moved Go out the first end that moves into simultaneously of coding and form this newly encoded or opposite motion process.
Further, in the specific one-dimensional bar code, every bar code includes at least one unit informal voucher code or unit The width of secret note code, unit informal voucher code or unit secret note code is equal, is to compile symbol value number, the volume symbol value number and coding theory Displacement resolution is related, and is determined by camera device accuracy of identification.
Further, the tape is made of the film of PC materials, it is adaptable to which plane or curved surface are installed, and being capable of spacing From being spliced;The specific one-dimensional bar code is printed upon in tape by UV, and tape is attached to the fixed part of tested machine On part, length direction is consistent with the Kinematic part direction of motion.
Further, camera device is ccd video camera.
A kind of displacement detecting method based on above-mentioned motor synchronizing bar code displacement transducer, it is characterised in that:
During work, it is tested displacement machine device or the device synchronous with tested displacement machine device drives reading head motion, reading head Camera device reads the specific one-dimensional bar code in tape, obtains the absolute position residing for current reading head, that is, is tested displacement machine The current location of device, difference is detection displacement result between current location and original position.
Further, in reading process, reading head successively carries out integer in setting time and read and decimal reading, reads Continued to move to after finishing and real-time update;Reading head or camera device are in moving process by taken specific one-dimensional barcode Code directly carries out simulation and turns to carry out integer reading after coding;Decimal reading process is based on intelligent image treatment technology and striped difference Principle, after the analog-converted coding containing absolute location information, is moved using striped differential principle in moving process and read.
Further, integer reading process is:The digit suitable with reading fringe zone length of original position spy's dimension bar code Binary coding information, into after the view-finder of camera device namely reading fringe region, reading head exports the position Absolute position values;When camera device obtains specific bar code, while also convert and to generate chequered with black and white, width equal equal For a millimeters of simulation striped, the absolute position values of acquired position are then calculated by simulating striped;When reading head moves right When reaching new position after dynamic setpoint distance, binary newly encoded information of digit suitable with reading fringe zone length is obtained, The newly encoded information just corresponds to the absolute position after now setpoint distance;The setpoint distance is encoding precision;Pass through start bit Put the absolute displacement of absolute position mathematic interpolation with new position;
Decimal reading process is:
Will be specific taken by view-finder or reading fringe region first in original position reading head or camera device One-dimensional bar code carries out analog-converted, forms the equal in width simulation striped that black and white strip width is a millimeters;
Simulate that a lot of overall width is suitable with simulation striped overall width again, arrange from left to right including black streaking and informal voucher Black streaking width is a millimeters in the difference striped of line, the difference striped, and white width of fringe is b millimeters, b < a;
Finally, from left to right, first black streaking of difference striped is alignd with first black streaking in simulation striped, The black streaking of difference striped is alignd with simulation the N articles informal voucher line of striped, then can now obtain difference striped white width of fringe b and Striped difference accuracy is
Difference striped is moved with reading head and finally overlapped with simulation striped, starts the exhausted of fractional part in the process Position is recognized and calculated.
Further, some technical term lexical or textual analysis in the present invention are as follows:
" motor synchronizing " lexical or textual analysis is as follows:
Because reading head is the binary system that the digit that is consistent with view-finder size is from left to right read from frame is read, institute all the time As long as so that clearly picture can be photographed within the scope of the camera automatic focusing of reading head, longitudinally namely perpendicular to tape surface Shake be not influence the degree of accuracy of reading, so referred to as motor synchronizing.
" specific one-dimensional bar code " lexical or textual analysis is as follows:
General one-dimensional bar code is with chequered with black and white, and the striped coding schedule that width differs defers to standard various up to numeral.But nothing By which kind of standard deferred to, using " initial code "-" numeric data code "-" end code " form.Specific one-dimensional bar for displacement detecting Shape code, is many striped pole strip shape codes of the distributing installation in the range of useful range, its length range is preferably at 40 to 60 millimeters Between, limited by ccd video camera window dimension, displacement is understood advantageously using specific one-dimensional bar code.
Specific one-dimensional bar code is that the bar shaped code length array that continuous a plurality of chequered with black and white, width differs is arranged parallel to each other structure Into every bar code includes at least one unit informal voucher code or unit secret note code, the width or unit secret note code of unit informal voucher code Width it is equal;The width of unit informal voucher code or the width of unit secret note code are volume symbol value, and compiling symbol value can original definition For the Arbitrary Digit in the middle of 2~9, show to participate in the primitive number of coding, this number is limited by ccd video camera resolution ratio.For example, When volume symbol value takes 3, the primitive number for participating in coding is 3, and motor synchronizing bar code should mutually have 3 kinds of different line widths;Such as when coding member When value takes 5, the primitive number for participating in coding is 5, and motor synchronizing bar code should mutually have 5 kinds of different line widths;
Motor synchronizing bar code displacement transducer is with the positioning of absolute position bar code plus difference mechanism for resolving cooperation. Ccd video camera form is limited in long flat view-finder, with quick effective tracking of intelligent focusing system, the encoding strip number of intake Can be with self-defining, it is ensured that when the gap between video camera and tape fluctuates widely, image clearly can be collected, bar number is equal And efficient coding striped placed in the middle.
The original print coding of strip encoding, is obtained using high-speed computer by specific tentative calculation program, and it is a lot of Fixed number position, non-duplicate, rolling absolute coding, encode minimum unusual fluctuation at intervals of two bar code central axis spacing of arbitrary neighborhood, Coding theory displacement resolution is corresponding with this spacing.
So-called rolling coding, implies that CCD view-finders are removing the first while moving into end forms newly encoded or opposite This motion process.
In summary, the invention discloses a kind of new absolute type motor synchronizing bar code displacement transducer, including one Tape, a reading box.The tape base material is PC films, and specific one-dimensional bar code is printed on into its face using UV printers On, the reading box is that specific one-dimensional bar code is read and processing system, has display screen etc. above, there is ccd video camera below.Chi With being affixed on using gluing mode in the fixed component of tested displacement machine device, specific one-dimensional bar code is all the time towards the shooting of reading box Machine.During work, it is tested displacement machine device and drives the motion of reading box, ccd video camera reads the specific one-dimensional bar code in tape, obtains Absolute position residing for current ccd video camera, that is, be tested the current location of displacement machine device.
The tape is flexible tape, and straight line or curvilinear path can be followed to install, and gap is read in the contactless friction of relative motion Adaptively, code length can be widely applied to water conservancy and hydropower, industrial and mining enterprises, communications and transportation, environmental protection, army almost without limitation The field such as frock is standby.
Such as can by tape be arranged on water conservancy and hydropower gate edge, the lifting displacement of direct measurement gate plane or arcwall face, The various defects of existing displacement transducer can be solved well.
Relative to prior art, the present invention reads principle using specific one-dimensional bar code, develops a kind of new motor synchronizing Bar code displacement transducer, the motor synchronizing bar code displacement transducer is based on intelligent image treatment technology and striped differential principle, By the coding containing absolute location information, expressed, and read by reading box using specific one-dimensional bar code, can accurately surveyed The displacement and absolute position values of object are measured, its range is almost unrestricted.It has significantly than existing displacement transducer Advantage and beneficial effect:
1st, absolute reading code, does not influence reading after power down;
2nd, it is easy for installation, only need external fixed reading box and tape just can complete to install;
3rd, convenient later maintenance, tape setting distance is from being spliced, and breakage is pulled down without whole piece tape at one, only needs to change Corresponding region tape;
4th, have a wide range of application, flexible tape can curved surface attach, it is adaptable to multi-motion track occasion;
5th, in some specific application areas, such as water conservancy and hydropower gate vertical lifting, the shake of gate left and right directions is very serious, A variety of displacement detecting products on the market can not solve to shake the larger error in reading brought and bounce very well at present.Because this The reading head of invention is the binary system that the digit that is consistent with view-finder size is from left to right read from frame is read all the time, as long as so Clearly picture, longitudinal direction namely the shake perpendicular to tape surface can be photographed within the scope of the camera automatic focusing of reading head It is not influence the degree of accuracy of reading.
Brief description of the drawings
Fig. 1 is the three-dimensional view of motor synchronizing bar code displacement transducer of the present invention.
Fig. 2 is the counting principle figure of motor synchronizing bar code displacement transducer of the present invention.
Fig. 3 is the formation figure of simulation striped 12 in motor synchronizing bar code displacement transducer striped differential principle figure of the present invention.
Fig. 4 is the simulation striped 12 and difference bar in motor synchronizing bar code displacement transducer striped differential principle figure of the present invention The combination figure of line 13.
Fig. 5 is difference move of stripe procedure chart of the motor synchronizing bar code displacement transducer of the present invention in reading process.
In Fig. 1-5, each reference correspondence is as follows:1st, tape;2nd, specific one-dimensional bar code;3rd, reading box;4th, display screen; 5th, bar code reading device;6th, function button;7th, microUSB data-interfaces;8th, signal lamp;The 9th, fixing hole is installed;10th, read Take fringe area;11st, coding information;12nd, striped is simulated;13rd, difference striped.
Embodiment
The motor synchronizing bar code displacement sensor structure schematic diagram of the present invention is as shown in figure 1, motor synchronizing bar code of the present invention Displacement transducer, includes reading box 3, tape 1, the specific one-dimensional bar code 2 being imprinted in tape.The reading box 3 and tape 1 It is separated by a distance, and remain parallel, the direction of motion of reading box 3 is consistent with the length direction of tape 1.Wherein, on reading box 3 Bread contains display screen 4, function button 6, microUSB data-interfaces 7, signal lamp 8, is mounted below bar code and reads dress 5 (being ccd video camera in the present embodiment) are put, the right and left there are 2 installation fixing holes 9 respectively.
In the present embodiment, the tape 1 uses the film of PC materials, with good pliability, it is adaptable to plane or song Face is installed, and setting distance is from being spliced.Its base material weatherability is good, can be chronically in outdoor adverse circumstances and use.It is specific One-dimensional bar code 2 uses chequered with black and white, the specific one-dimensional bar code coded system that width differs, through striped difference Intelligent treatment Afterwards, its Measurement Resolution is up to 0.1 millimeter, the theory unlimited system of code length.Specific one-dimensional bar code 2 is beaten by UV printers It is imprinted in tape 1.In the fixed component that tape 1 is attached to tested machine with gluing mode, length direction and Kinematic portion The part direction of motion is consistent.
Reading box 3 is this Sensor core intelligently solution read apparatus.In Fig. 1 embodiment, reading box 3 installs solid by 4 Determine hole 9 to be fixed on the movable part of tested machine, have the one of bar code reading device 5 facing to tape 1, and keep a spacing From reading box 3 parallel to tape 1 and reads specific one-dimensional bar code 2 all the time during having a machine in operation.
In the present embodiment, three function buttons 6 respectively " switch ", " reset/clearing ", " setting/note on reading box 3 Recall ", " switch " button control bar code reading device switch, (whether should be bar code reading device, or other what sensors If please express) " reset/clearing " button be used for control position to reset, " setting/memory " button be used for store-memory measure number According to this and the operation such as other functions selection, whether three signal lamps 8 can be used for display sensor bar code reading device 5 normal Work, functional mode prompting, button prompts etc., display screen 4 then more intuitively shows present position values, battery electric quantity, unit The operation display of the various functions such as switching, mode of operation.
The present invention operation principle be:
Specific one-dimensional bar code 2 is continuous unduplicated barcode encoding, defines bar code reading device 5 and readsMIndividual unit bar Code, each unit bar code is black or white and width is a millimeters, and unit informal voucher code is Binary Zero, and unit secret note code is binary one, In the moving process of reading box 3,MIn individual unit bar code, while first place removes a unit bar code, end moves into a unit bar Code, so that new coding is formed, so continuous unduplicated code capacity n=2MIt is individual.
As shown in Fig. 2 in the present embodiment, the reading fringe region 10 of bar code reading device 5 is specific for reading in real time One-dimensional bar code 2, the reading length in reading fringe region 10 is 16 unit bar codes, that is, reads 16 binary coding informations 11, the coding information 11 just corresponds to the positional information in algorithm, when 16 that have read Fig. 2 left figures position binary codings After information 11, reading box 3 is the absolute position values for exporting Fig. 2 left figures positions, when reading head 3 move right a millimeter after, arrival During Fig. 2 right figures, the new corresponding coding information 11 of 16 binary codings is obtained, the new coding information 11 has just corresponded to this Absolute position after a millimeters of Shi Yidong.By that analogy, when 3 every positions of reading box, one can be corresponded to and do not repeated Binary coding, that is, export the absolute position of the position, at the same will also realize that the encoding precision be a millimeters.
In reading process, reading box 3 successively carries out integer in very short time and read and decimal reading, and in moving process In constantly carry out integer read and decimal reading process, the displacement that real-time update is detected.
In integer reading process, CCD obtain specific bar code 2 when, while also converted and generate it is chequered with black and white, it is wide Degree is a simulation striped 12 (such as Fig. 3), then calculates the absolute location information of the position by simulating stripe information, then lead to The difference of original position and new position is crossed, absolute displacement is calculated.
Integer part read-out resolution only has a, to obtain higher precision, in the integer reading of the certain precision of above-mentioned acquisition Intelligent difference processing is carried out to the striped of the specific one-dimensional bar code 2 of non-duplicate continuous programming code state on the basis of process, so as to Carry out the reading of fractional part.
The reading principles and methods of the present invention are illustrated in figure 3, will be specific one-dimensional taken by it first in reading box 3 Bar code 2 (part on Fig. 3) carries out analog-converted, forms the equal in width simulation (figure of striped 12 that black and white strip width is a millimeters 3 times parts), then in enlarged drawing as shown in Figure 4, then simulate black streaking in a lot of difference striped 13, the difference striped 13 Width is a millimeters, and white width of fringe is b millimeters, b < a;Finally, from left to right, by first black streaking of difference striped 13 with First black streaking alignment in striped 12 is simulated, makes the black streaking and simulation the N articles informal voucher line pair of striped 12 of difference striped 13 Together, then the white width of fringe b of difference striped 13 can now be obtained:
Then now striped difference accuracy is:
In the present embodiment, N is natural number, takes N=10, a=1mm, (a scope can be 0-10mm, this reality in theory Apply example and take 1mm) then the white width of fringe of difference striped 13 be 0.9mm, now difference accuracy be 0.1mm.Fig. 2 integer part is read Afterwards, difference striped 13 is moved with reading box 3 and overlapped with simulation striped 12, starts the identification of fractional part.Such as Fig. 5, by (a) to (c) three figures are the start to finish that difference striped 13 is moved in the range of 1mm, the black streaking of difference striped 13 respectively gradually with mould The informal voucher line intended in striped 12 is overlapped, such as second figure in Fig. 5, the black streaking of difference striped 13 and the in simulation striped 12 4 informal voucher lines coincide, then now fractional part reading in absolute position is 0.4mm.When obtaining specific bar code 2 due to CCD, Also converted simultaneously and generate chequered with black and white, width is a simulation striped 12 (such as Fig. 3), and difference striped 13 is by computer Generation, and all the time with reading box geo-stationary, read fractional part when, equivalent to " finite length " difference striped 13 and " nothing Limit for length's degree " simulation striped 12 overlap, to every a millimeter carry out difference reading.
Thus, the present invention carries out the reading embodiment of integer precision by above-mentioned continuous unduplicated barcode encoding, and The embodiment that integer precision and decimal precision are combined, resolution ratio base is recognized by intelligent difference processing in non-duplicate continuous programming code displacement The enterprising step refining of plinth, it is in the nature the smart electronicsizationes processing of mechanical slide measure difference micrometer mechanism.
The present invention is compared with other prior arts, and its advantage is as follows:
1st, while bar code reading device is moved, contactless tape is arranged in the form of specific one-dimensional bar code In the shift motion of bar code reading device, specific one-dimensional bar code is not repeated continuously, realizes the simultaneous of big stroke and micro-stroke Hold, wide adaptability.
2nd, the reading of integer precision is carried out using continuous unduplicated barcode encoding, and identification point is being moved in non-duplicate code bit Bar code intelligent difference processing is carried out on the basis of resolution and carries out decimal precision identification, realizes and is surveyed based on mechanical slide measure difference The smart electronicses processing mode of micro- principle, reading accuracy is high.
3rd, using absolute addressing mode, reading is not influenceed after power down.The reading in the reading fringe region of bar code reading device Length is corresponding with the absolute location information of bar code;After have read binary coding information of original position, reading box is defeated Go out the absolute position values of the position, when reading head, which is moved, reaches new barcode position after a width of fringe, obtained newly The corresponding coding information of binary coding, the new coding information just corresponds to the absolute position after now moving.
4th, theoretical code infinite in length system, as long as tape carrier is supported, the displacement measurement available for extra long distance.
5th, simple in construction, it is that can be achieved that reading device configures compact processor by ccd video cameras, and tape carrier is easy to system Acquisition is made, to the less demanding of space enrironment during setting, wide application, simple installation.
6th, it is easy to manufacture and assemble, prepares maintenance cost cheap.

Claims (10)

1. a kind of motor synchronizing bar code displacement transducer, including tape and moveable reading head;Reading head is separated by with tape to be set Put and include camera device, it is characterised in that:Tape is arranged to what camera device can be recognized towards the surface of camera device Specific one-dimensional bar code;The specific one-dimensional bar code, is continuously distributed a plurality of chequered with black and white, width in tape length range The narrow many bar codes differed be arranged parallel to each other composition fixed number position, non-duplicate rolling absolute coding, every Barcode Length Matched with camera device view-finder size.
2. motor synchronizing bar code displacement transducer according to claim 1, it is characterised in that:Display is also set up on reading head Screen, function button, microUSB data-interfaces, signal lamp, reading head lower surface set the camera device, and reading head is solid It is scheduled in the mobile device with test system displacement synchronous or is directly anchored in test system;Tape is arranged at tested displacement machine In the fixed component of device, length direction is consistent with the Kinematic part direction of motion.
3. motor synchronizing bar code displacement transducer according to claim 1, it is characterised in that:Camera device is along tape surface Direction where length remains parallel with tape, and moving direction is consistent with tape length direction during camera device reading code.
4. motor synchronizing bar code displacement transducer according to claim 1, it is characterised in that:The specific one-dimensional barcode Code, the minimum unusual fluctuation of coding at intervals of two bar code central axis spacing of arbitrary neighborhood, coding theory displacement resolution with around here Away from correspondence;The rolling absolute coding, i.e. camera device view-finder are removing coding first place while moving into end forms newly encoded Or this opposite motion process.
5. motor synchronizing bar code displacement transducer according to claim 1, it is characterised in that:The specific one-dimensional bar code In, every bar code includes the width of at least one unit informal voucher code or unit secret note code, unit informal voucher code or unit secret note code It is equal, it is to compile symbol value number, the volume symbol value number is related to coding theory displacement resolution, and by camera device accuracy of identification It is determined that.
6. motor synchronizing bar code displacement transducer according to claim 1, it is characterised in that:The tape uses PC materials Film be made, it is adaptable to plane or curved surface are installed, and can set a distance be spliced;The specific one-dimensional bar code passes through UV It is printed upon in tape, in the fixed component that tape is attached to tested machine, length direction and the Kinematic part direction of motion Unanimously.
7. motor synchronizing bar code displacement transducer according to claim 1, it is characterised in that:Camera device images for CCD Machine.
8. a kind of displacement detecting method of one of the use the claims 1-7 motor synchronizing bar code displacement transducer, its It is characterised by:
During work, it is tested displacement machine device or the device synchronous with tested displacement machine device drives reading head motion, the shooting of reading head Device reads the specific one-dimensional bar code in tape, obtains the absolute position residing for current reading head, that is, is tested displacement machine device Current location, difference is detection displacement result between current location and original position.
9. displacement detecting method according to claim 8, it is characterised in that:In reading process, reading head is in setting time Interior priority carries out integer and read and decimal reading, and reading is continued to move to and real-time update after finishing;Reading head or camera device exist Taken specific one-dimensional bar code is directly carried out into simulation in moving process to turn to carry out integer reading after coding;Decimal is read Process is based on intelligent image treatment technology and striped differential principle, after the analog-converted coding containing absolute location information, Moved and read using striped differential principle in moving process.
10. displacement detecting method according to claim 9, it is characterised in that:Integer reading process is:Original position spy's dimension Binary coding information of the digit suitable with reading fringe zone length of bar code, view-finder namely reading into camera device Take after fringe area, reading head exports the absolute position values of the position;When camera device obtains specific bar code, while also will It is a millimeters of simulation striped that it, which converts and generates chequered with black and white, width equal, then by simulate striped calculate it is acquired The absolute position values of position;When reaching new position after reading head moves right setpoint distance, obtain long with reading fringe region Binary newly encoded information of suitable digit is spent, the newly encoded information just corresponds to the absolute position after now setpoint distance;Should Setpoint distance is encoding precision;Pass through the absolute displacement of the absolute position mathematic interpolation of original position and new position;
Decimal reading process is:
Will be specific one-dimensional taken by view-finder or reading fringe region first in original position reading head or camera device Bar code carries out analog-converted, forms the equal in width simulation striped that black and white strip width is a millimeters;
Simulate that a lot of overall width is suitable with simulation striped overall width again, arrange from left to right including black streaking and informal voucher line Black streaking width is a millimeters in difference striped, the difference striped, and white width of fringe is b millimeters, b < a;
Finally, from left to right, first black streaking of difference striped is alignd with first black streaking in simulation striped, makes difference The black streaking of fractional fringes aligns with simulation the N articles informal voucher line of striped, then can now obtain the white width of fringe b and striped of difference striped Difference accuracy is
Difference striped is moved with reading head and finally overlapped with simulation striped, starts the absolute position of fractional part in the process Put identification and calculate.
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