阅读说明：本技术 全自动线纹尺检定方法 (Full-automatic linear scale calibration method ) 是由 陈敬盛 于 2019-09-03 设计创作，主要内容包括：本发明公开了一种全自动线纹尺检定方法,包括以下步骤：步骤T1：装夹钢卷尺和钢直尺；步骤T2：调节摄像系统使得线纹尺成像图像清晰易识别；步骤T3：选择执行自动检定步骤或者手动检定步骤,以获得线纹尺成像图像；步骤T4：基于线纹尺成像图像,利用金属光栅和图像识别步骤获取线纹尺在标称刻度线处的偏差量。发明公开的全自动线纹尺检定方法,基于金属光栅、图像识别等技术,提高线纹尺的自动化程度和检定精度。同时,通过软硬件配合,向使用者提供较为充分的显示信息和操作功能,提升使用者的操作体验。(The invention discloses a kind of full-automatic linear scale calibration methods, comprising the following steps: step T1: clamping steel tape and straight steel ruler；Step T2: adjusting camera system makes linear scale image clearly easy to identify；Step T3: selection executes automatic Verification step or manual verification step, to obtain linear scale image；Step T4: being based on linear scale image, obtains departure of the linear scale at nominal graduation mark using metal grating and image recognizing step.The full-automatic linear scale calibration method of disclosure of the invention improves the degree of automation and calibration accuracy of linear scale based on technologies such as metal grating, image recognitions.Meanwhile being cooperated by software and hardware, it is provided to user and more adequately shows information and operating function, promote the operating experience of user.)

1. a kind of full-automatic linear scale calibration method, which comprises the following steps:

Step S1: stirring the button handsetting positioned at linear scale fixture, so that linear scale fixture is changed to open state by closed state；

Step S2: the ruler head insertion of linear scale is located at the slot of linear scale fixture, while unclamping button handsetting, so that linear scale presss from both sides Has Automatic-clamping linear scale；

Step S3: by the groove of the linear scale fixture merging detecting platform equipped with linear scale, and one end of traction rope is connected To the tail portion of linear scale fixture, while the other end of traction rope is connected to the briquetting positioned at detecting platform；

Step S4: one end of linear scale is fixed by the first linear scale gripping means grips for being located at detecting platform；

Step S5: traction rope is connected with hanging standard test weight；

Step S6: being laid in detecting platform for straight steel ruler, and straight steel ruler locator is horizontally disposed with along the guide rail for being located at detecting platform, So that the head and the tail both ends of straight steel ruler are respectively aligned to the identical graduation line of straight steel ruler locator；

Step S7: camera system is vertically moved along the longitudinal rail for being located at detecting platform until linear scale is directed at, to lock Second fixed knob, to lock the one degree of freedom of camera system；

Step S8: making camera system be adjusted to suitable height by adjusting knob, to lock the first fixed knob, thus Lock second freedom degree of camera system；

Step S9: by light source and regulating device adjusts light source until suitable brightness；

Step S10: by focus adjustment button handsetting up to suitable lens focus, so that linear scale image is clearly easily known Not；

Step S11: selection executes automatic Verification step or manual verification step, to obtain linear scale image；

Step S12: being based on linear scale image, obtains linear scale in nominal scale using metal grating and image recognizing step Departure at line.

2. full-automatic linear scale calibration method according to claim 1, which is characterized in that the first linear scale clamping device packet The first linear scale fixed block and the second linear scale fixed block are included, so that the first linear scale fixed block and are protruded into one end of linear scale Between two linear scale fixed blocks, the both ends end of the first linear scale fixed block passes through fastening nut and the second linear scale respectively The corresponding end of fixed block is fixedly connected.

3. full-automatic linear scale calibration method according to claim 2, which is characterized in that traction rope is placed through first It is connected after the location hole of the both ends end of linear scale fixed block with hanging standard test weight.

4. a kind of full-automatic linear scale calibration method, which comprises the following steps:

Step T1: clamping steel tape and straight steel ruler；

Step T2: adjusting camera system makes linear scale image clearly easy to identify；

Step T3: selection executes automatic Verification step or manual verification step, to obtain linear scale image；

Step T4: being based on linear scale image, obtains linear scale in nominal scale using metal grating and image recognizing step Departure at line.

5. full-automatic linear scale calibration method according to claim 4, which is characterized in that the step T1 is embodied as Following steps:

Step T1.1: stirring the button handsetting positioned at linear scale fixture, so that linear scale fixture is changed to opening state by closed state State；

Step T1.2: the ruler head insertion of linear scale is located at the slot of linear scale fixture, while unclamping button handsetting, so that linear scale Fixture Automatic-clamping linear scale；

Step T1.3: by the groove of the linear scale fixture merging detecting platform equipped with linear scale, and one end of traction rope is connected It is connected to the tail portion of linear scale fixture, while the other end of traction rope is connected to the briquetting positioned at detecting platform；

Step T1.4: one end of linear scale is fixed by the first linear scale gripping means grips for being located at detecting platform；Step T1.5: traction rope is connected with hanging standard test weight；

Step T1.6: being laid in detecting platform for straight steel ruler, and straight steel ruler locator is set along the guide rail level for being located at detecting platform It sets, so that the head and the tail both ends of straight steel ruler are respectively aligned to the identical graduation line of straight steel ruler locator.

6. full-automatic linear scale calibration method according to claim 4, which is characterized in that the step T2 is embodied as Following steps:

Step T2.1: camera system is vertically moved along the longitudinal rail for being located at detecting platform until linear scale is directed at, to lock Tight second fixed knob, to lock the one degree of freedom of camera system；

Step T2.2: making camera system be adjusted to suitable height by adjusting knob, to lock the first fixed knob, from And lock second freedom degree of camera system；

Step T2.3: by light source and regulating device adjusts light source until suitable brightness；

Step T2.4: by focus adjustment button handsetting up to suitable lens focus, so that linear scale image is clearly easily known Not.

7. full-automatic linear scale calibration method according to claim 4, it is characterised in that:

In the step T3, if selection executes automatic Verification step, it is embodied as following steps:

Step T3.1: starting full-automatic linear scale and examine and determine software, the user type and password that software verification user inputs, if It is proved to be successful and then enters software main interface, otherwise user is prompted to re-enter user type and password；

Step T3.2: linear scale information is inputted in the calibrating information module of software main interface and selects automatic Verification；

Step T3.3: select a groove as zero groove in linear scale image；

Step T3.4: the beginning assay module of software main interface is executed, so that the display field of software main interface is in verification process It shows the error amount and corresponding reading of this calibrating, and feeds back detailed data and verification result after calibrating；

Step T3.5: execute software main interface Print Preview module, so as to print or preview this calibrating detailed data And verification result；

In the step T3, if selection executes manual verification step, it is embodied as following steps:

Step TT3.1: starting full-automatic linear scale and examine and determine software, the user type and password that software verification user inputs, such as Fruit, which is proved to be successful, then enters software main interface, otherwise user is prompted to re-enter user type and password；

Step TT3.2: (correct) linear scale information is inputted in the calibrating information module of software main interface and selects inspection manually It is fixed；

Step TT3.3: it selects a groove as zero groove in linear scale image, is being popped up after reaching a certain calibrating point Input frame in input linear scale the calibrating point reading, and it is defeated in the input frame of pop-up after reaching next calibrating point Enter linear scale in the reading of the calibrating point；

Step TT3.4: executing groove calibration unit or the chessboard calibration unit in the setup module of software main interface, thus Detailed data and verification result (qualified or unqualified) are fed back after calibrating；

Step TT3.5: execute software main interface Print Preview module, so as to print or preview this calibrating detailed data And verification result.

8. full-automatic linear scale calibration method according to claim 7, it is characterised in that:

The automatic Verification step of the step T3 is further comprising the steps of:

Step T3.6: by the detailed data and verification result typing memory of this calibrating；

Step T3.7: executing the history module of software main interface, so that calling and showing the history for being stored in memory Calibrating record；

The manual verification step of the step T3 is further comprising the steps of

Step TT3.6: by the detailed data and verification result typing memory of this calibrating；

Step TT3.7: executing the history module of software main interface, so that calling and showing the history for being stored in memory Calibrating record.

9. full-automatic linear scale calibration method according to claim 7, which is characterized in that in step TT3.4:

Selection groove calibration unit specific steps include:

Gauge is placed in detecting platform, the focal length of adjusting camera system is until image clearly, selects groove to demarcate unit, in bullet Input calibration distance in dialog box out, in two grooves of the picture frame center phase selection neighbour of linear scale image, to complete Groove calibration；

Selection chessboard calibration unit specific steps include:

Standard chessboard is placed in detecting platform, the focal length of adjusting camera system is until image clearly, selects chessboard calibration unit, In Input angle points and indexing in the dialog box of pop-up, to complete chessboard calibration.

10. full-automatic linear scale calibration method according to claim 4, which is characterized in that the step T4 specific implementation For following steps:

Step T4.1: the camera pixel of camera system is calibrated by standard calibration figure；

Step T4.2: pretreatment linear scale image, to form pretreatment image；

Step T4.3: the edge contour information of the groove in pretreatment image is extracted；

Step T4.4: secondary treatment is carried out for the edge contour information of groove, to form the center line information of groove；

Step T4.5: capturing zero point groove and terminates groove, to calculate zero point groove and terminate the pixel number between groove；

Step T4.6: using the actual displacement of metal grating record moving image acquisition system walking to form grating reading, In Fitting shape at groove is terminated in line, to measure the straight line and actual distance of the zero point groove in the visual field obtains indicating value mistake Grating reading and error of indication summation are obtained the true measurement terminated at groove, then acquire the inclined of nominal graduation mark by difference Difference.

Technical field

The invention belongs to strain line class tool measurer Calibration Technology fields, and in particular to a kind of full-automatic linear scale calibrating side Method.

Background technique

Publication No. CN204854506U, subject name are linear scale calibrating installation, and technical solution discloses " in board (5) left slide unit (4) and right slide unit (6) are installed on；Left slide unit (4) is pulled by the screw rod (2) on left motor (I) axis, on a left side Ruler folder (3) is respectively mounted on slide unit (4) and right slide unit (6)；Ruler folder (3) is internally provided with mutual corresponding upper magnetic force pressing aid piece (32) With lower electromagnet (33), gap and ruler between upper magnetic force pressing aid piece (32) and lower electromagnet (33) press from both sides the ruler slot (31) on (3) It is corresponding, it is equipped with infrared inductor (34) on the ruler folder (3) of ruler slot (31) corresponding position, the gap of infrared inductor (34) (35) corresponding with ruler slot (31)；Ruler folder (3) on right slide unit (6) is connected by the counterweight (71) of bracing wire and Gravity support mechanism (7) It connects, is fixedly installed with swivel nut (73) on the counterweight (71) of Gravity support mechanism (7), screw rod (74) is inserted in swivel nut (73) internal screw thread company Connect, screw rod (74) is coaxially fixed with motor (75) axis, Gravity support mechanism (7) two sides be equipped with uplink limit switch (72) and Downlink limit switch (76) ".

By taking above-mentioned utility model patent as an example, in strain line class tool measurer Calibration Technology field, machine automatization is generallyd use Change control mode, although can be made by introducing infrared inductor etc. when steel tape is put into slidingtype clamper ruler slot, by Infrared inductor, which generates signal and is delayed through N (adjustable) second, makes slidingtype clamper electromagnet action that steel tape be sucked.On however, It states mechanical automation control mode to be only limitted to really examine and determine the position fixing process of the steel tape before starting, although to a certain extent can The positioning accuracy of steel tape is enough improved, but due to being not introduced into the contents such as metal grating technology, image recognition technology, leads to essence Property improve the calibration accuracy of object (for example, steel tape) to be checked, it is therefore desirable to be further improved.

Summary of the invention

The present invention is directed to the situation of the prior art, overcomes disadvantages described above, provides a kind of full-automatic linear scale calibration method.

The main purpose of the present patent application is, based on technologies such as metal grating, image recognitions, improves the automatic of linear scale Change degree and calibration accuracy.

The another object of the present patent application is, is cooperated by software and hardware, provides to user and more adequately shows letter Breath and operating function, promote the operating experience of user.

The present invention use following technical scheme, the full-automatic linear scale calibration method the following steps are included:

Step S1: stirring the button handsetting positioned at linear scale fixture, so that linear scale fixture is changed to open by closed state State；

Step S2: the ruler head insertion of linear scale is located at the slot of linear scale fixture, while unclamping button handsetting, so that strain line Ruler fixture Automatic-clamping linear scale；

Step S3: will be equipped with the groove of the linear scale fixture merging detecting platform of linear scale, and by one end of traction rope It is connected to the tail portion of linear scale fixture, while the other end of traction rope is connected to the briquetting positioned at detecting platform；

Step S4: one end of linear scale is fixed by the first linear scale gripping means grips for being located at detecting platform；

Step S5: traction rope is connected with hanging standard test weight；

Step S6: being laid in detecting platform for straight steel ruler, and straight steel ruler locator is horizontal along the guide rail for being located at detecting platform Setting, so that the head and the tail both ends of straight steel ruler are respectively aligned to the identical graduation line of straight steel ruler locator；

Step S7: by camera system along the longitudinal rail longitudinal movement positioned at detecting platform up to being directed at linear scale, so as to The second fixed knob is locked, to lock the one degree of freedom of camera system；

Step S8: making camera system be adjusted to suitable height by adjusting knob, to lock the first fixed knob, To lock second freedom degree of camera system；

Step S9: by light source and regulating device adjusts light source until suitable brightness；

Step S10: by focus adjustment button handsetting up to suitable lens focus, so that linear scale image is clearly easy Identification；

Step S11: selection executes automatic Verification step or manual verification step, to obtain linear scale image；

Step S12: being based on linear scale image, obtains linear scale nominal using metal grating and image recognizing step Departure at graduation mark.

According to the above technical scheme, further preferred technical solution as above-mentioned technical proposal, the first linear scale clamp Device includes the first linear scale fixed block and the second linear scale fixed block, so that one end of linear scale is protruded into the first linear scale and fixed Between block and the second linear scale fixed block, the both ends end of the first linear scale fixed block passes through fastening nut and second respectively The corresponding end of linear scale fixed block is fixedly connected.

According to the above technical scheme, traction rope is passed through position by further preferred technical solution as above-mentioned technical proposal It is connected after the location hole of the both ends end of the first linear scale fixed block with hanging standard test weight.

Present patent application also discloses a kind of full-automatic linear scale calibration method, comprising the following steps:

Step T1: clamping steel tape and straight steel ruler；

Step T2: adjusting camera system makes linear scale image clearly easy to identify；

Step T3: selection executes automatic Verification step or manual verification step, to obtain linear scale image；

Step T4: being based on linear scale image, obtains linear scale nominal using metal grating and image recognizing step Departure at graduation mark.

According to the above technical scheme, further preferred technical solution as above-mentioned technical proposal, the step T1 are specific It is embodied as following steps:

Step T1.1: stirring the button handsetting positioned at linear scale fixture, so that linear scale fixture is changed to out by closed state Open state；

Step T1.2: the ruler head insertion of linear scale is located at the slot of linear scale fixture, while unclamping button handsetting, so that line Line ruler fixture Automatic-clamping linear scale；

Step T1.3: will be equipped with the groove of the linear scale fixture merging detecting platform of linear scale, and by the one of traction rope End is connected to the tail portion of linear scale fixture, while the other end of traction rope is connected to the briquetting positioned at detecting platform；

Step T1.4: one end of linear scale is fixed by the first linear scale gripping means grips for being located at detecting platform；

Step T1.5: traction rope is connected with hanging standard test weight；

Step T1.6: being laid in detecting platform for straight steel ruler, by straight steel ruler locator along the guide rail water for being located at detecting platform Flat setting, so that the head and the tail both ends of straight steel ruler are respectively aligned to the identical graduation line of straight steel ruler locator.

According to the above technical scheme, further preferred technical solution as above-mentioned technical proposal, the step T2 are specific It is embodied as following steps:

Step T2.1: by camera system along the longitudinal rail longitudinal movement positioned at detecting platform up to being directed at linear scale, with Just the second fixed knob is locked, to lock the one degree of freedom of camera system；

Step T2.2: making camera system be adjusted to suitable height by adjusting knob, to lock the first fixed rotation Button, to lock second freedom degree of camera system；

Step T2.3: by light source and regulating device adjusts light source until suitable brightness；

Step T2.4: by focus adjustment button handsetting up to suitable lens focus, so that linear scale image is clear It is easy to identify.

According to the above technical scheme, further preferred technical solution as above-mentioned technical proposal, in the step T3, such as Fruit selection executes automatic Verification step, then is embodied as following steps:

Step T3.1: starting full-automatic linear scale and examine and determine software, the user type and password that software verification user inputs, Enter software main interface if being proved to be successful, otherwise user is prompted to re-enter user type and password；

Step T3.2: linear scale information is inputted in the calibrating information module of software main interface and selects automatic Verification；

Step T3.3: select a groove as zero groove in linear scale image；

Step T3.4: the beginning assay module of software main interface is executed, so that the display field of software main interface was being examined and determine The error amount and corresponding reading of this calibrating are shown in journey, and detailed data and verification result are fed back after calibrating；

Step T3.5: execute software main interface Print Preview module, so as to print or preview this calibrating it is detailed Data and verification result；

In the step T3, if selection executes manual verification step, it is embodied as following steps:

Step TT3.1: starting full-automatic linear scale calibrating software, the user type of software verification user input and close Code enters software main interface if being proved to be successful, and otherwise user is prompted to re-enter user type and password；

Step TT3.2: (correct) linear scale information is inputted in the calibrating information module of software main interface and selects hand Dynamic calibrating；

Step TT3.3: selecting a groove as zero groove in linear scale image, reach after a certain calibrating point Linear scale is inputted in the input frame of pop-up in the reading of the calibrating point, and in the input frame of pop-up after reaching next calibrating point Reading of the middle input linear scale in the calibrating point；

Step TT3.4: executing groove calibration unit or the chessboard calibration unit in the setup module of software main interface, from And detailed data and verification result (qualified or unqualified) are fed back after calibrating；

Step TT3.5: execute software main interface Print Preview module, so as to print or preview this calibrating it is detailed Data and verification result.

According to the above technical scheme, further preferred technical solution as above-mentioned technical proposal, the step T3 from Dynamic verification step is further comprising the steps of:

Step T3.6: by the detailed data and verification result typing memory of this calibrating；

Step T3.7: executing the history module of software main interface, is stored in memory so that calling and showing History calibrating record；

The manual verification step of the step T3 is further comprising the steps of

Step TT3.6: by the detailed data and verification result typing memory of this calibrating；

Step TT3.7: executing the history module of software main interface, is stored in memory so that calling and showing History calibrating record.

According to the above technical scheme, further preferred technical solution as above-mentioned technical proposal, in step TT3.4:

Selection groove calibration unit specific steps include:

Gauge is placed in detecting platform, the focal length of adjusting camera system selects groove to demarcate unit up to image clearly, The input calibration distance in the dialog box of pop-up, in two grooves of the picture frame center phase selection neighbour of linear scale image, thus Complete groove calibration；

Selection chessboard calibration unit specific steps include:

Standard chessboard is placed in detecting platform, the focal length of adjusting camera system is until image clearly, selects chessboard calibration list Member, input angle points and indexing in the dialog box of pop-up, to complete chessboard calibration.

According to the above technical scheme, further preferred technical solution as above-mentioned technical proposal, the step T4 are specific It is embodied as following steps:

Step T4.1: the camera pixel of camera system is calibrated by standard calibration figure；

Step T4.2: pretreatment linear scale image, to form pretreatment image；

Step T4.3: the edge contour information of the groove in pretreatment image is extracted；

Step T4.4: secondary treatment is carried out for the edge contour information of groove, to form the center line information of groove；

Step T4.5: capturing zero point groove and terminates groove, to calculate zero point groove and terminate the pixel number between groove；

Step T4.6: using the actual displacement of metal grating record moving image acquisition system walking to form grating reading Number in line, measures the straight line and is shown with actual distance of the zero point groove in the visual field terminating fitting shape at groove It is worth error, grating reading and error of indication summation is obtained into the true measurement terminated at groove, then acquire nominal graduation mark Deviation.

Full-automatic linear scale calibration method disclosed by the invention, the beneficial effect is that, it is based on metal grating, image recognition Etc. technologies, improve the degree of automation and calibration accuracy of linear scale.Meanwhile being cooperated by software and hardware, it is provided more to user Adequately display information and operating function, promote the operating experience of user.

Specific embodiment

The invention discloses a kind of full-automatic linear scale calibration methods, below with reference to preferred embodiment, to tool of the invention Body embodiment is further described.

Preferred embodiment.

Preferably, the full-automatic linear scale calibration method the following steps are included:

Step S1: stirring the button handsetting positioned at linear scale fixture, so that linear scale fixture is changed to open by closed state State (i.e. slot of the exposure positioned at linear scale fixture)；

Step S2: the ruler head insertion of (tested, similarly hereinafter) linear scale is located to the slot of linear scale fixture, while unclamping and dialling Dynamic button, so that linear scale fixture Automatic-clamping linear scale；

Step S3: will be equipped with the groove of the linear scale fixture merging detecting platform of linear scale, and by one end of traction rope It is connected to the tail portion of linear scale fixture, while the other end of traction rope is connected to the briquetting positioned at detecting platform；

Step S4: one end of linear scale is fixed by the first linear scale gripping means grips for being located at detecting platform；

Step S5: traction rope is connected with hanging standard test weight；

Step S6: being laid in detecting platform for straight steel ruler, and straight steel ruler locator is horizontal along the guide rail for being located at detecting platform Setting, so that the head and the tail both ends of straight steel ruler are respectively aligned to the identical graduation line of straight steel ruler locator；

Step S7: by camera system along the longitudinal rail longitudinal movement positioned at detecting platform up to being directed at linear scale, so as to (1) second fixed knob is locked, to lock the one degree of freedom of camera system；

Step S8: camera system is made to be adjusted to (corresponding with tested linear scale) by adjusting knob suitable high Degree, to lock (4) first fixed knob, to lock second freedom degree of camera system；

Step S9: by light source and regulating device adjusts light source until suitable brightness；

Step S10: by focus adjustment button handsetting up to suitable lens focus, so that linear scale image is clearly easy Identification；

Step S11: selection executes automatic Verification step or manual verification step, with the imaging of acquisition (qualified) linear scale Image；

Step S12: being based on linear scale image, obtains linear scale nominal using metal grating and image recognizing step Departure at graduation mark.

Wherein, the first linear scale clamping device includes the first linear scale fixed block and the second linear scale fixed block, so that line One end of line ruler is protruded between the first linear scale fixed block and the second linear scale fixed block, and the two of the first linear scale fixed block End end passes through fastening nut respectively and is fixedly connected with the corresponding end of the second linear scale fixed block.

Wherein, traction rope is placed through after the location hole of the both ends end of the first linear scale fixed block and hanging standard Counterweight is connected.

Wherein, standard test weight preferably uses 5kg standard test weight.

Wherein, detecting platform preferably uses marble platform.

Further, in the step S11, if selection executes automatic Verification step, following steps are embodied as:

Step S11.1: starting full-automatic linear scale calibrating software, the user type of software verification user input and close Code enters software main interface if being proved to be successful, and otherwise user is prompted to re-enter user type and password；

Step S11.2: (correct) linear scale information is inputted in the calibrating information module of software main interface and is selected certainly Dynamic calibrating；

Step S11.3: select a groove as zero groove in linear scale image；

Step S11.4: the beginning assay module of software main interface is executed, so that the display field of software main interface was being examined and determine The error amount and corresponding reading of this calibrating are shown in journey, and detailed data and verification result are fed back after calibrating (qualified or unqualified)；

Step S11.5: execute software main interface Print Preview module, so as to print or preview this calibrating it is detailed Data and verification result.

It is noted that in step S11.4, it is further comprising the steps of:

In verification process, freeze other function module of the software main interface in addition to stopping assay module (in addition to stopping Other function module can not execute operation except calibrating functional module).

Further, the step S11 is further comprising the steps of:

Step S11.6: by the detailed data and verification result typing memory of this calibrating；

Step S11.7: executing the history module of software main interface, is stored in memory so that calling and showing History calibrating record (i.e. the detailed data and verification result of the secondary calibrating).

Further, in the step S11, if selection executes manual verification step, following steps are embodied as:

Step SS11.1: starting full-automatic linear scale calibrating software, the user type of software verification user input and close Code enters software main interface if being proved to be successful, and otherwise user is prompted to re-enter user type and password；

Step SS11.2: (correct) linear scale information is inputted in the calibrating information module of software main interface and selects hand Dynamic calibrating；

Step SS11.3: select a groove as zero groove in linear scale image, after reaching a certain calibrating point Linear scale is inputted in the input frame of pop-up in the reading of the calibrating point, and in the input of pop-up after reaching next calibrating point Linear scale is inputted in frame in the reading of the calibrating point；

Step SS11.4: executing groove calibration unit or the chessboard calibration unit in the setup module of software main interface, To feed back detailed data and verification result (qualified or unqualified) after calibrating；

Step SS11.5: execute software main interface Print Preview module, so as to print or preview this calibrating it is detailed Count evidence and verification result accurately.

Further, in step SS11.4, the specific steps for selecting groove to demarcate unit include:

Gauge is placed in detecting platform, the focal length of adjusting camera system selects groove to demarcate unit up to image clearly, Input calibration distance (unit: mm), wire is adjacent in the picture frame of linear scale image two in the dialog box of pop-up Groove, to complete groove calibration.

Further, in step SS11.4, the specific steps of selection chessboard calibration unit include:

Standard chessboard is placed in detecting platform, the focal length of adjusting camera system is until image clearly, selects chessboard calibration list Member, input angle points (X*X) and indexing (unit: mm) in the dialog box of pop-up, to complete chessboard calibration.

It is noted that in step SS11.4, it is further comprising the steps of:

In verification process, freeze other function module of the software main interface in addition to stopping assay module (in addition to stopping Other function module can not execute operation except calibrating functional module).

Further, the step SS11 is further comprising the steps of:

Step SS11.6: by the detailed data and verification result typing memory of this calibrating；

Step SS11.7: executing the history module of software main interface, is stored in memory so that calling and showing History calibrating record (i.e. the detailed data and verification result of the secondary calibrating)

Further, the step S12 is embodied as following steps:

Step S12.1: the camera pixel of camera system is calibrated by standard calibration figure；

Step S12.2: pretreatment (by the camera system acquisition by calibration) linear scale image, to form pre- place Manage image；

Step S12.3: the edge contour information of the groove in pretreatment image is extracted；

Step S12.4: secondary treatment is carried out for the edge contour information of groove, to form the center line information of groove；

Step S12.5: capturing zero point groove and terminates groove, to calculate zero point groove and terminate the pixel between groove Number；

Step S12.6: using the actual displacement of metal grating record moving image acquisition system walking to form grating reading Number in line, measures the straight line and is shown with actual distance of the zero point groove in the visual field terminating fitting shape at groove It is worth error, grating reading and error of indication summation is obtained into the true measurement terminated at groove (nominal graduation mark), then asked Obtain the deviation of nominal graduation mark.

First embodiment.

Preferably, the full-automatic linear scale calibration method the following steps are included:

Step T1: clamping steel tape and straight steel ruler；

Step T2: adjusting camera system makes linear scale image clearly easy to identify；

Step T3: selection executes automatic Verification step or manual verification step, with the imaging of acquisition (qualified) linear scale Image；

Step T4: being based on linear scale image, obtains linear scale nominal using metal grating and image recognizing step Departure at graduation mark.

Further, the step T1 is embodied as following steps:

Step T1.1: stirring the button handsetting positioned at linear scale fixture, so that linear scale fixture is changed to out by closed state Open state (i.e. slot of the exposure positioned at linear scale fixture)；

Step T1.2: the ruler head insertion of (tested, similarly hereinafter) linear scale is located to the slot of linear scale fixture, is unclamped simultaneously Button handsetting, so that linear scale fixture Automatic-clamping linear scale；

Step T1.3: will be equipped with the groove of the linear scale fixture merging detecting platform of linear scale, and by the one of traction rope End is connected to the tail portion of linear scale fixture, while the other end of traction rope is connected to the briquetting positioned at detecting platform；

Step T1.4: one end of linear scale is fixed by the first linear scale gripping means grips for being located at detecting platform；

Step T1.5: traction rope is connected with hanging standard test weight；

Step T1.6: being laid in detecting platform for straight steel ruler, by straight steel ruler locator along the guide rail water for being located at detecting platform Flat setting, so that the head and the tail both ends of straight steel ruler are respectively aligned to the identical graduation line of straight steel ruler locator.

Wherein, the first linear scale clamping device includes the first linear scale fixed block and the second linear scale fixed block, so that line One end of line ruler is protruded between the first linear scale fixed block and the second linear scale fixed block, and the two of the first linear scale fixed block End end passes through fastening nut respectively and is fixedly connected with the corresponding end of the second linear scale fixed block.

Wherein, traction rope is placed through after the location hole of the both ends end of the first linear scale fixed block and hanging standard Counterweight is connected.

Wherein, standard test weight preferably uses 5kg standard test weight.

Wherein, detecting platform preferably uses marble platform.

Further, the step T2 is embodied as following steps:

Step T2.1: by camera system along the longitudinal rail longitudinal movement positioned at detecting platform up to being directed at linear scale, with Just (1) second fixed knob is locked, to lock the one degree of freedom of camera system；

Step T2.2: camera system is made to be adjusted to (corresponding with tested linear scale) by adjusting knob suitable high Degree, to lock (4) first fixed knob, to lock second freedom degree of camera system；

Step T2.3: by light source and regulating device adjusts light source until suitable brightness；

Step T2.4: by focus adjustment button handsetting up to suitable lens focus, so that linear scale image is clear It is easy to identify；

Further, in the step T3, if selection executes automatic Verification step, following steps are embodied as:

Step T3.1: starting full-automatic linear scale and examine and determine software, the user type and password that software verification user inputs, Enter software main interface if being proved to be successful, otherwise user is prompted to re-enter user type and password；

Step T3.2: (correct) linear scale information is inputted in the calibrating information module of software main interface and is selected automatic Calibrating；

Step T3.3: select a groove as zero groove in linear scale image；

Step T3.4: the beginning assay module of software main interface is executed, so that the display field of software main interface was being examined and determine The error amount and corresponding reading of this calibrating are shown in journey, and detailed data and verification result are fed back after calibrating (qualified or unqualified)；

Step T3.5: execute software main interface Print Preview module, so as to print or preview this calibrating it is detailed Data and verification result.

It is noted that in step T3.4, it is further comprising the steps of:

In verification process, freeze other function module of the software main interface in addition to stopping assay module (in addition to stopping Other function module can not execute operation except calibrating functional module).

Further, the step T3 is further comprising the steps of:

Step T3.6: by the detailed data and verification result typing memory of this calibrating；

Step T3.7: executing the history module of software main interface, is stored in memory so that calling and showing History calibrating record (i.e. the detailed data and verification result of the secondary calibrating).

Further, in the step T3, if selection executes manual verification step, following steps are embodied as:

Step TT3.1: starting full-automatic linear scale calibrating software, the user type of software verification user input and close Code enters software main interface if being proved to be successful, and otherwise user is prompted to re-enter user type and password；

Step TT3.2: (correct) linear scale information is inputted in the calibrating information module of software main interface and selects hand Dynamic calibrating；

Step TT3.3: selecting a groove as zero groove in linear scale image, reach after a certain calibrating point Linear scale is inputted in the input frame of pop-up in the reading of the calibrating point, and in the input frame of pop-up after reaching next calibrating point Reading of the middle input linear scale in the calibrating point；

Step TT3.4: executing groove calibration unit or the chessboard calibration unit in the setup module of software main interface, from And detailed data and verification result (qualified or unqualified) are fed back after calibrating；

Step TT3.5: execute software main interface Print Preview module, so as to print or preview this calibrating it is detailed Data and verification result.

Further, in step TT3.4, the specific steps for selecting groove to demarcate unit include:

Gauge is placed in detecting platform, the focal length of adjusting camera system selects groove to demarcate unit up to image clearly, The input calibration distance (unit: mm) in the dialog box of pop-up, at two of the picture frame center phase selection neighbour of linear scale image Groove, to complete groove calibration.

Further, in step TT3.4, the specific steps of selection chessboard calibration unit include:

Standard chessboard is placed in detecting platform, the focal length of adjusting camera system is until image clearly, selects chessboard calibration list Member, input angle points (X*X) and indexing (unit: mm) in the dialog box of pop-up, to complete chessboard calibration.

It is noted that in step TT3.4, it is further comprising the steps of:

In verification process, freeze other function module of the software main interface in addition to stopping assay module (in addition to stopping Other function module can not execute operation except calibrating functional module).

Further, the step T3 is further comprising the steps of:

Step TT3.6: by the detailed data and verification result typing memory of this calibrating；

Step TT3.7: executing the history module of software main interface, is stored in memory so that calling and showing History calibrating record (i.e. the detailed data and verification result of the secondary calibrating).

Further, the step T4 is embodied as following steps:

Step T4.1: the camera pixel of camera system is calibrated by standard calibration figure；

Step T4.2: pretreatment (by the camera system acquisition by calibration) linear scale image, to form pre- place Manage image；

Step T4.3: the edge contour information of the groove in pretreatment image is extracted；

Step T4.4: secondary treatment is carried out for the edge contour information of groove, to form the center line information of groove；

Step T4.5: capturing zero point groove and terminates groove, to calculate zero point groove and terminate the pixel number between groove；

Step T4.6: using the actual displacement of metal grating record moving image acquisition system walking to form grating reading Number in line, measures the straight line and is shown with actual distance of the zero point groove in the visual field terminating fitting shape at groove It is worth error, grating reading and error of indication summation is obtained into the true measurement terminated at groove (nominal graduation mark), then asked Obtain the deviation of nominal graduation mark.

According to the above technical scheme, full-automatic linear scale calibration method disclosed in present patent application, can be used for examining and determine Using steel tape as the linear scale of representative, working principle is described below.

Specifically, the scale of image recognition technology identification linear scale is used as measurement standard using metal grating.Automatically Read measured value, the automatic actual measured value for showing linear scale.Meanwhile can also be achieved measurement result it is real-time record, processing and Storage, automatically forms original record and calibration certificate etc..It is noted that being also convenient to carry out using metal grating technology Number display and subdivision.

It is noted that the technical characteristics such as detailed process for the image preprocessing that present patent application is related to should be regarded For the prior art, the specific structures of these technical characteristics, working principle and the control mode that may relate to, space layout side Formula uses the conventional selection of this field, is not construed as where the inventive point of the invention patent, the invention patent do not do into One step is specifically unfolded to be described in detail.

For a person skilled in the art, technical solution documented by foregoing embodiments can still be repaired Change or equivalent replacement of some of the technical features, it is all within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should be included in protection scope of the present invention.