CN106643509A - System and method for measuring workpiece - Google Patents
System and method for measuring workpiece Download PDFInfo
- Publication number
- CN106643509A CN106643509A CN201710118843.5A CN201710118843A CN106643509A CN 106643509 A CN106643509 A CN 106643509A CN 201710118843 A CN201710118843 A CN 201710118843A CN 106643509 A CN106643509 A CN 106643509A
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- China
- Prior art keywords
- laser displacement
- displacement sensor
- workpiece
- controller
- measurement
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
Abstract
The invention discloses a system and method for measuring a workpiece. The system comprises a laser displacement sensor, a motion mechanism, a controller and an upper computer system, wherein the motion mechanism is used for driving the laser displacement sensor to move under the control of the controller; the laser displacement sensor is used for measuring under the control of the controller and sending the acquired measurement data to the upper computer system; the controller is used for receiving an input instruction, confirming a to-be-measured position on the workpiece according to the instruction, controlling the motion mechanism to drive the laser displacement sensor to move according to the position and controlling the laser displacement sensor to measure the position of the workpiece; and the upper computer system is used for confirming a data processing rule corresponding to a measurement item selected in advance, utilizing the confirmed data processing rule to process the measurement data collected by the laser displacement sensor and acquiring a measurement result. According to the invention, the invalid measurement data can be prevented from being collected, and the measurement cost can be lowered.
Description
Technical field
The present invention relates to fields of measurement, and especially, it is related to a kind of workpiece calibration system and method.
Background technology
Optical pickocff is the instrument measured according to optical principle, and this kind of sensor has many advantages, for example, can
Realize noncontact and non-destroyed measurement, measurement is almost interference-free, high-speed transfer can be realized and can remote measurement, remote control, can
The advantages of real-time processing.
Optical pickocff includes many types, wherein, the laser displacement sensor with laser triangulation as general principle is
One kind using laser be light source, by CMOS (Complementary Metal Oxide Semiconductor, complementary metal oxygen
Compound semiconductor) or CCD (Charge-coupled Device, charge coupled cell) sensors as receiver precision
Measuring instrument.This sensor can change in the non-contact case in the position of accurate measurement testee, displacement etc., and
The measurement of the geometric senses such as displacement, thickness, vibration, distance, the diameter of detection object can be applied to.
For example, Application No. 201010560382.5, entitled " the multi-parameter inner diameter measurement based on the coaxial positioning of high accuracy
System and measuring method " Chinese patent, discloses the scheme that workpiece diameter is measured using laser sensor.The patent is proposed
Solution although the internal diameter of workpiece can be measured, the measurement of the patent is all positions to workpiece inner wall
All measure.In fact, can there is groove or opening on the inwall of many workpiece, if when internal diameter is measured to being provided with
Measure where groove or opening, resulting data are nonsensical, normal analysis can be also affected on the contrary.
In addition, as it was previously stated, the parameter that laser displacement sensor can be measured has many kinds.Side disclosed in above-mentioned patent
Case is used only for measuring the internal diameter of workpiece, and its function is more single, does not actually give full play of laser displacement sensor
Effect.
For the problems referred to above, effective solution is not yet proposed at present.
The content of the invention
For the problem in correlation technique, the present invention proposes a kind of workpiece calibration system and method, can avoid collecting
Invalid measurement data position, and also the measurement of various projects can be realized.
According to an aspect of the invention, there is provided a kind of workpiece calibration system.
Workpiece calibration system of the invention includes laser displacement sensor, motion, controller and host computer
System.Wherein, motion drives under the control of the controller laser displacement sensor to move；Laser displacement sensor is used for
Measure under the control of controller, and the measurement data of acquisition is sent into master system；Controller is used for receives input
Instruction, the position for needing to measure on workpiece is determined according to instruction, also, controller is additionally operable to according to position, controls fitness machine
Structure drives laser displacement sensor motion, and controls laser displacement sensor the position of workpiece is measured；Master system
For the corresponding data processing rule of the measure the item for determining be pre-selected, and using the data processing rule for determining to swashing
The measurement data of Optical displacement sensor collection is processed, and obtains measurement result.
Wherein, various measure the items and the data corresponding to every kind of measure the item are provided with master system in advance
Process rule.
Additionally, master system can be also used for recording measurement result and be counted, and generated according to measurement result
Chart.
Additionally, after measurement result is obtained, master system is additionally operable to according to the calibration result being previously obtained to measurement knot
Fruit compensates.
Alternatively, motion can be straight line module, and motion includes servomotor, guide rail and slide block, laser position
Displacement sensor is arranged on slide block, and slide block is installed on guide rail and is moved along guide rail under the driving of servomotor.
Alternatively, controller is programmable logic controller (PLC) PLC.
According to a further aspect in the invention, there is provided a kind of workpiece measuring.
Workpiece measuring of the invention includes：The instruction of controller receives input, determines on workpiece according to instruction
Need the position of measurement；According to position, control motion drives laser displacement sensor motion to controller, and controls laser position
Displacement sensor is measured to the position of workpiece；Laser displacement sensor is measured under the control of the controller, and will be obtained
Measurement data be sent to master system；Master system determines the data processing corresponding with the measure the item being pre-selected
Rule, and the measurement data that laser displacement sensor is gathered is processed using the data processing rule for determining, measured
As a result.
Wherein, can be provided with advance in master system corresponding to various measure the items and every kind of measure the item
Data processing rule.
Additionally, said method of the invention may further include：
Master system is recorded to measurement result and counted, and generates chart according to measurement result.
Additionally, after measurement result is obtained, master system can be carried out according to advance calibration result to measurement result
Compensation.
The present invention is logical can to realize following beneficial effect：
(1) by driving laser displacement sensor to move and survey according to the position control motion for needing to measure on workpiece
Amount, can avoid collecting invalid measurement data, reduce unnecessary measurement, improve measurement efficiency；
(2) by configuring the data processing rule corresponding to different measuring project in master system so that host computer
After the data for obtaining laser displacement sensor collection, can be carried out according to the data processing rule corresponding to current measure the item
Process, obtain the measurement result of current measure the item, so as to allow laser displacement sensor to be applied to different measure the items,
The functionality advantage of laser displacement sensor is given full play to, measurement cost is reduced；
(3) measurement result is compensated by using calibration result, can be avoided because the factor such as equipment error, temperature error is led
The problem for causing accuracy of measurement to reduce, it is ensured that certainty of measurement, allows whole system to meet the demand of accurate measurement；
(4) master system can be counted to measurement result and recorded, and generate chart, so as to avoid artificial record
The troublesome operation such as enter, reduce workload, realize automatic measurement.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing that needs are used is briefly described, it should be apparent that, drawings in the following description are only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can be being obtained according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the block diagram of workpiece calibration system according to embodiments of the present invention；
Fig. 2 be workpiece calibration system according to embodiments of the present invention is calibrated after the calibration result curve map that obtains；
Fig. 3 is the flow chart of workpiece measuring according to embodiments of the present invention.
Specific embodiment
The description of this illustrated embodiment should be in combination with corresponding accompanying drawing, and accompanying drawing should be used as the one of complete specification
Part.In the accompanying drawings, the shape or thickness of embodiment can expand, and to simplify or conveniently indicate.Furthermore, respectively tie in accompanying drawing
The part of structure will be illustrated with describing respectively, it is notable that the unit not illustrated not shown in figure or by word
Part, is the form known to a person of ordinary skill in the art in art.
The description of embodiments herein, about any reference in direction and orientation, is for only for ease of description, and can not manage
Solution is any restriction to the scope of the present invention.Explanation below for preferred embodiment can be related to the combination of feature,
These features may be individually present or combine presence, and the present invention is not especially defined in preferred embodiment.The present invention
Scope be defined by the claims.
A kind of embodiments in accordance with the present invention, there is provided workpiece calibration system.
As shown in figure 1, workpiece calibration system according to embodiments of the present invention includes laser displacement sensor 1, motion
2nd, controller 3 and master system 4.
Wherein, motion 2 drives laser displacement sensor 1 to move under the control of controller 3；Laser displacement sensor
1 is used to be measured under the control of controller 3, and the measurement data of acquisition is sent into master system 4；Controller 3 is used
In the instruction of receives input, the position for needing to measure on workpiece is determined according to instruction, also, controller 3 is additionally operable to as needed
The position of measurement, control motion 2 drives laser displacement sensor 1 to move, and controls laser displacement sensor 1 on workpiece
The position for needing measurement measures；Master system 4 is used to determine at the data corresponding with the measure the item being pre-selected
Reason rule, and the measurement data that laser displacement sensor is gathered is processed using the data processing rule for determining, surveyed
Amount result.
Wherein, for different measure the items, although all measured using laser displacement sensor, but for laser
The processing method (including computational methods) of the data that displacement tactility apparatus is collected is different.For example, internal diameter is carried out to workpiece
Measurement, for the data for collecting need different process, can just access corresponding result compared with the measurement of planeness is carried out.
Various measure the items and the data corresponding to every kind of measure the item can be provided with master system 4 in advance
Process rule.For example, if user selects to need to carry out the measurement of planeness, receive laser displacement in master system 4 and pass
After the data of the measurement of sensor 1, it will data are calculated according to process rule (including algorithm) corresponding to the measurement of planeness,
So as to obtain the flatness of measured workpiece.
In one embodiment, controller 3 can determine the position for needing to measure on workpiece according to the instruction of input.Specifically
Ground, controller can be received by touch-screen and instructed, and touch-screen can provide user interface, so as to user input instruction.This refers to
The information included in order can specify the position for needing to measure on workpiece, or, the information that the instruction is included can also be specified
The position that need not be measured on workpiece.For example, when the internal diameter of workpiece is measured, it is assumed that motion needs to drive laser displacement to pass
Sensor is from initial position along the final position being linearly moved at initial position 10cm；On the workpiece, distance is initial
These three position positions arrange fluted or opening at position 2cm, 4cm and 6cm, then when internal diameter is measured, without the need for measure this 3
Internal diameter size at individual position.By means of with the input equipment such as the touch-screen of the supporting setting of controller, user can be by instruction
The position input that this 3 need not be measured.After the instruction is received, controller, will not when motion motion is controlled
Can stop in above three position.For example, controller control motion move when, can allow motion move to away from
Stop respectively when away from initial position 1cm, 3cm, 5cm, 7cm, 8cm, 9cm, 10cm, and controller can each retention period all
Measurement instruction is sent to laser displacement sensor, allows laser displacement sensor to measure, controller can be after each measurement
Real-time Collection measurement data.
Additionally, in one embodiment, master system 4 is additionally operable to record measurement result and counted, and according to
Measurement result generates chart.This makes it possible to avoid the troublesome operations such as manual entry, reduce workload, realize automatic measurement.
Moreover, master system can also realize that import feature is derived in the inquiry of historical data, data, allow the looking into of measurement result
Ask, backtracking is more efficient, convenient.
Alternatively, above-mentioned motion can be straight line module (laser displacement sensor can be driven to move along a straight line),
Motion include servomotor, guide rail and slide block, laser displacement sensor be arranged on slide block on, slide block be installed on guide rail and
Moved along a straight line along guide rail under the driving of servomotor.Motion can also further using screw mandrel and bearing watched
In the presence of taking motor, laser displacement sensor motion is driven.
Alternatively, in one embodiment, controller noted above is programmable logic controller (PLC) (PLC).
In actual applications, workpiece calibration system can include that laser displacement sensor 1,1 set of straight line module (contain servo
Drive), straight line module bracket, PLC, touch-screen and Electric Appliance Cabinet；Measuring table can select 00 grade of marble platform；In order to
Measuring system is calibrated, can be with configuration standard ceramic gauge block；Upper computer software can be used to gather laser displacement sensor
Measurement data；PLC is then used for powered motion mechanism and drives laser displacement sensor to measure.
Before actual measurement is carried out, the straight line module after assembling can be placed on 00 grade of marble, and (straight line module is
Assembled by parts such as screw mandrel, guide rail, slide block, bearing, servomotors, laser displacement sensor is pacified after being fixed by mechanical device
Loaded on straight line module；
Further, since straight line module can produce deformation, so can also calibrate to straight line module first before measuring.
When being calibrated, can first start PLC, straight line module slide block resets；Start to start servomotor；PLC program is responsible for drive
Dynamic straight line module, straight line module often moves 2mm, and PLC is using level triggers laser displacement sensor to above-mentioned standard ceramic gauge block
Collection displacement data；Host computer reads the real time data of laser displacement sensor.It is alternatively possible to gather 200 points, (points can
It is self-defined to carry out according to actual needs), according to 200 point datas Yn for measuring, on the basis of origin Y0, each point makees difference just with Y0
Deviation (Δ n=Yn-Y0) is can be derived that, and then the deformation deviation figure of guide rail each point can be obtained (that is, it is determined that straight
Linearity at each position of line module), specifically may refer to Fig. 2.
After calibration, can start to measure testee.At this point it is possible to standard ceramic gauge block is removed, will be by
Survey thing and be positioned over 00 grade of marble platform, measured object is positioned in the middle of the support of straight line module.PLC control straight line module slide blocks are answered
Position；When true measurement is started, PLC control servomotors, servomotor will drive slide block movement, movement space during measurement and
Movement space during calibration is consistent, or, the integral multiple of movement space when movement space during measurement can also be calibration.
Master system real-time data collection, and carried out using deviation data (for example, the deviation map shown in Fig. 2) pointwise that obtains of calibration
Compensation, and image is shown as in real time.
Although the process calibrated is illustrated by taking straight line module as an example before, in fact, the fitness machine that the present invention can be adopted
Structure is not limited to straight line module, and the method for calibration is also not limited to said method.When compensating, for different motions
Mechanism, can compensate according to other errors in its frame for movement to measurement result.Furthermore it is also possible to according to measuring environment
In the parameter such as temperature, humidity measurement result is compensated.
Embodiments in accordance with the present invention, additionally provide a kind of workpiece measuring.
As shown in figure 3, workpiece measuring according to embodiments of the present invention includes：
Step S301, the instruction of controller receives input determines the position for needing to measure on workpiece according to the instruction；
Step S303, according to above-mentioned position, control motion drives laser displacement sensor motion to controller, and controls
Laser displacement sensor is measured to the above-mentioned position of workpiece；
Step S305, laser displacement sensor is measured under the control of the controller, and the measurement data for obtaining is sent out
Give master system；
Step S307, master system determines the data processing rule corresponding with the measure the item being pre-selected, and profit
The measurement data that laser displacement sensor is gathered is processed with the data processing rule for determining, obtains measurement result.
Wherein, can be provided with advance in master system corresponding to various measure the items and every kind of measure the item
Data processing rule.
In one embodiment, measuring method of the invention may further include：
Master system is recorded to measurement result and counted, and generates chart according to measurement result.
Additionally, carrying out data processing to the measurement data from laser displacement sensor in host computer obtains measurement result
Afterwards, master system is compensated according to advance calibration result to measurement result, using the result after compensation as final measurement
As a result.
In sum, the invention provides a kind of cheap, efficient, accurate measurement scheme, the program is based on laser displacement
The automatic measurement mechanism of sensor, PLC and motion (straight line module).Straight line module is driven using PLC and drive
Laser displacement sensor realizes automatic measurement operation, and the data of collection are automatically uploaded to host computer, generate measurement result curve,
For example, when the present invention is for the measurement of planeness, flatness curve can be generated.Technical scheme can simplify user
Operation, realizes full-automatic measurement, including：Automation motion sampling site, automation generate datagraphic and a key obtains high-precision
Degrees of data；
The measurement scheme of the present invention possesses versatility, except the measurement of planeness, applies also for flat article, various industry originals
The thickness measure of material etc., can be also used for the accurate dimensional measurement such as object distance, diameter.Dotted line is only needed in master system
In in advance logging data process rule and select the project to be measured in measurement, just can direct measurement, the survey needed for obtaining
Amount result.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of workpiece calibration system, it is characterised in that including laser displacement sensor, motion, controller and upper
Machine system, wherein：
The motion drives the laser displacement sensor to move under the control of the controller；
The laser displacement sensor is used to be measured under the control of the controller, and the measurement data for obtaining is sent
To the master system；
The controller is used for the instruction of receives input, and the position for needing to measure on workpiece, also, institute are determined according to the instruction
State controller to be additionally operable to according to the position, control the motion and drive the laser displacement sensor motion, and control
The laser displacement sensor is measured to the position of the workpiece；
The master system is used to determine the data processing rule corresponding with the measure the item being pre-selected, and utilizes determination
The data processing rule measurement data that the laser displacement sensor is gathered is processed, obtain measurement knot
Really.
2. workpiece calibration system according to claim 1, it is characterised in that be provided with advance in the master system many
Data processing rule corresponding to kind measure the item and every kind of measure the item.
3. workpiece calibration system according to claim 1, it is characterised in that the master system is additionally operable to the survey
Amount result is recorded and counted, and generates chart according to measurement result.
4. workpiece calibration system according to claim 1, it is characterised in that after the measurement result is obtained, it is described on
Position machine system is additionally operable to compensate the measurement result according to the calibration result being previously obtained.
5. workpiece calibration system according to claim 1, it is characterised in that the motion is straight line module, described
Motion includes servomotor, guide rail and slide block, and the laser displacement sensor is arranged on the slide block, the slide block peace
Moved along the guide rail loaded on guide rail and under the driving of the servomotor.
6. workpiece calibration system according to claim 1, it is characterised in that the controller is programmable logic controller (PLC)
PLC。
7. a kind of workpiece measuring, it is characterised in that include：
The instruction of controller receives input, the position for needing to measure on workpiece is determined according to the instruction；
According to the position, control motion drives laser displacement sensor motion to the controller, and controls the laser
Displacement transducer is measured to the position of the workpiece；
The laser displacement sensor is measured under the control of the controller, and the measurement data of acquisition is sent into institute
State master system；
The master system determines the data processing rule corresponding with the measure the item being pre-selected, and using the institute for determining
State data processing rule to process the measurement data that the laser displacement sensor is gathered, obtain measurement result.
8. workpiece measuring according to claim 7, it is characterised in that be provided with advance in the master system many
Data processing rule corresponding to kind measure the item and every kind of measure the item.
9. workpiece measuring according to claim 7, it is characterised in that further include：
The master system is recorded and counted to the measurement result, and generates chart according to measurement result.
10. workpiece measuring according to claim 7, it is characterised in that after the measurement result is obtained, it is described on
Position machine system is compensated according to advance calibration result to the measurement result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710118843.5A CN106643509A (en) | 2017-03-01 | 2017-03-01 | System and method for measuring workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710118843.5A CN106643509A (en) | 2017-03-01 | 2017-03-01 | System and method for measuring workpiece |
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| Publication Number | Publication Date |
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| CN106643509A true CN106643509A (en) | 2017-05-10 |
Family
ID=58846766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710118843.5A Pending CN106643509A (en) | 2017-03-01 | 2017-03-01 | System and method for measuring workpiece |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109282715A (en) * | 2018-09-21 | 2019-01-29 | 苏州市计量测试院 | A kind of calliper automatic measurement system and method |
| CN109685054A (en) * | 2018-12-26 | 2019-04-26 | 广东工业大学 | Object detecting method, device, medium and equipment based on 3 D scanning system |
| CN111964594A (en) * | 2020-07-15 | 2020-11-20 | 中国电子科技集团公司第二十九研究所 | System and method for intelligently selecting heat-conducting insulating pad of radiator on board-level device |
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| CN101354241A (en) * | 2008-07-11 | 2009-01-28 | 长安大学 | Method and system for evaluating aggregate digital image |
| CN102095384A (en) * | 2010-11-25 | 2011-06-15 | 天津大学 | Multiparameter internal-diameter measurement system and method based on high-precision coaxial positioning |
| CN104930970A (en) * | 2015-06-12 | 2015-09-23 | 上海大学 | Large workpiece laser measuring system and measuring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1031165A (en) * | 1996-07-16 | 1998-02-03 | Olympus Optical Co Ltd | Image input device and scanning type microscope device |
| CN101354241A (en) * | 2008-07-11 | 2009-01-28 | 长安大学 | Method and system for evaluating aggregate digital image |
| CN102095384A (en) * | 2010-11-25 | 2011-06-15 | 天津大学 | Multiparameter internal-diameter measurement system and method based on high-precision coaxial positioning |
| CN104930970A (en) * | 2015-06-12 | 2015-09-23 | 上海大学 | Large workpiece laser measuring system and measuring method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109282715A (en) * | 2018-09-21 | 2019-01-29 | 苏州市计量测试院 | A kind of calliper automatic measurement system and method |
| CN109685054A (en) * | 2018-12-26 | 2019-04-26 | 广东工业大学 | Object detecting method, device, medium and equipment based on 3 D scanning system |
| CN111964594A (en) * | 2020-07-15 | 2020-11-20 | 中国电子科技集团公司第二十九研究所 | System and method for intelligently selecting heat-conducting insulating pad of radiator on board-level device |
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| CB03 | Change of inventor or designer information |
Inventor after: Lv Xin Inventor after: Feng Jiajie Inventor before: Feng Jiajie Inventor before: Lv Xin |
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Application publication date: 20170510 |
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