CN108692697A - A kind of flatness checking device and method - Google Patents
A kind of flatness checking device and method Download PDFInfo
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- CN108692697A CN108692697A CN201810193847.4A CN201810193847A CN108692697A CN 108692697 A CN108692697 A CN 108692697A CN 201810193847 A CN201810193847 A CN 201810193847A CN 108692697 A CN108692697 A CN 108692697A
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- photo
- coupler
- workpiece
- detection
- pcb board
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/30—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring roughness or irregularity of surfaces
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention discloses a kind of flatness checking device, including detection pcb board, winding displacement, capture card and AD conversion module, multiple photo-couplers are provided on the detection pcb board, and multiple photo-couplers are arranged along the corresponding position of workpiece for measurement peripheral wall;The capture card is connect by the winding displacement with the detection pcb board;The AD conversion module is connect with the acquisition card signal.The invention also discloses a kind of methods carrying out flatness detection using the flatness checking device, include the following steps:S1, multiple photo-couplers are set on detection pcb board, and keep the shape that multiple photo-couplers surround consistent with the shape of workpiece for measurement peripheral wall;S2, workpiece is placed on photo-coupler, so that all photo-couplers is powered, capture card is used in combination to acquire the voltage value that each photo-coupler measures;S3, each voltage value is transmitted to AD conversion module, the voltage value that capture card is collected into is calculated and is converted to the measured value that can directly display planeness of workpiece by AD conversion module.
Description
Technical field
The present invention relates to flatness detection technique field more particularly to a kind of flatness checking device and methods.
Background technology
In the production of the electronic devices such as mobile phone, tablet computer, personal digital assistant and MP4, it usually needs production
The miniature workpiece of multiple frame-types or sheet, these workpiece include multiple peripheral walls, need to detect the flat of each peripheral wall in production
Face degree.
Existing measurement method is usually that the end face of multiple peripheral walls of workpiece is positioned in detection platform, is made by operator
It is measured with gap of the feeler gauge between the end face and detection platform of each peripheral wall of workpiece, and judges whether that reaching detection wants
It asks.However, most of workpiece size to be measured is smaller, the gap between workpiece peripheral wall end face and detection platform is smaller, manually
Detection is not easy and easy tos produce error very much, needs repeated measurement, expends more manpower and time, is unfavorable for improving production effect
Rate.
Invention content
The technical problem to be solved by the present invention is to:A kind of flatness checking device is provided and is detected using the flatness
The method that device carries out flatness detection, is not only simple in structure, cost is relatively low, and high certainty of measurement, and measuring speed is fast.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention one is:
A kind of flatness checking device, including detection pcb board, winding displacement, capture card and AD conversion module, the detection PCB
Multiple photo-couplers are provided on plate, and multiple photo-couplers are arranged along the corresponding position of workpiece for measurement peripheral wall;The capture card
It is connect with the detection pcb board by the winding displacement;The AD conversion module is connect with the acquisition card signal.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention two is:
A method of flatness detection, including following step are carried out using the flatness checking device described in technical solution one
Suddenly:
S1, the shape and workpiece for measurement that multiple photo-couplers are set, and multiple photo-couplers is made to surround on detection pcb board
The shape of peripheral wall is consistent;
S2, workpiece is placed on photo-coupler, all photo-couplers is made to be powered, capture card is used in combination to acquire each optical coupling
The voltage value that device measures;
S3, each voltage value is transmitted to AD conversion module, the voltage value that capture card is collected by AD conversion module calculates
The measured value of planeness of workpiece can be directly displayed by being converted to.
The beneficial effects of the present invention are:The flatness test device of the present invention, it is simple in structure, it is not necessarily to special no part, at
This is relatively low;Method measurement efficiency using the carry out flatness detection of the flatness checking device is high, does not have skill to survey crew
Art requirement, high certainty of measurement.
Description of the drawings
Fig. 1 is the overall structure diagram of the flatness checking device of the embodiment of the present invention;
Fig. 2 is the structural schematic diagram of the detection pcb board of the embodiment of the present invention;
Label declaration:
1, pcb board is detected;11, photo-coupler;2, PLC controller;3, control cabinet;31, capture card;32, trigger relay;
33, output relay;4, AD conversion module;5, jig plate;6, cylinder.
Specific implementation mode
To explain the technical content, the achieved purpose and the effect of the present invention in detail, below in conjunction with embodiment and coordinate attached
Figure is explained.
The design of most critical of the present invention is:Multiple photo-couplers, and multiple photo-coupler edges are set on detection pcb board
The peripheral wall of element under test is arranged;Setting capture card is connected with detection pcb board, can acquire the analog signal of each photo-coupler, if
It sets AD conversion module with capture card to be connected, the numerical signal of display plane degree can be converted analog signals into.
Please refer to Fig. 1 and Fig. 2, a kind of flatness checking device, including detection pcb board, winding displacement, capture card and AD conversion
Module is provided with multiple photo-couplers on the detection pcb board, and multiple photo-couplers are along the corresponding position of workpiece for measurement peripheral wall
Arrangement;The capture card is connect by the winding displacement with the detection pcb board;The AD conversion module and the acquisition card signal
Connection.
Operation principle:Workpiece for measurement is placed on photo-coupler, the tested surface of workpiece and each photo-coupler on periphery
Contact, each photo-coupler can according between tested surface and photo-coupler light transmission capacity number be converted into corresponding voltage value, adopt
After truck collects the voltage value of these simulations, by these analog signal transmissions to AD conversion module, AD conversion module will be simulated
It is the numerical signal that can directly display flatness that signal, which turns to calculate,.
As can be seen from the above description, the beneficial effects of the present invention are:The flatness test device of the present invention, it is simple in structure,
Without special no part, cost is relatively low;Measurement efficiency is high, does not have a technology requirement to survey crew, high certainty of measurement, and can be direct
Ground obtains measurement data, manually need not be recorded and be calculated.
Further, the photo-coupler includes diode end and triode end, and the triode end of the photo-coupler is leaned on
The diode end of the outside setting of the nearly detection pcb board, the photo-coupler is arranged close to the inside of the detection pcb board.
Seen from the above description, the triode end is photon acceptor end, and the receiving terminal of photo-coupler is placed in optocoupler row
The outside of cloth keeps the detecting state of optocoupler close, to improve accuracy of detection.
Further, further include PLC controller and trigger relay, the trigger relay is connected to the PLC controls
Between device and the capture card.
Seen from the above description, PLC control program can be directly set, and it is real-time to automatically control capture card by trigger relay
Acquire analog signal.
Further, further include cylinder and output relay for removing defective products, the cylinder is set to the inspection
Survey the side of pcb board;The output relay is connected between the PLC controller and cylinder, the PLC controller with it is described
AD conversion module communication connection.
Seen from the above description, the PLC controller can send out corresponding control according to the result of calculation of AD conversion module
Signal, when the calculated numerical signal of AD conversion module meets the requirements, PLC controller exports OK signals, and cylinder remains stationary as;
When the calculated numerical signal of AD conversion module is undesirable, PLC controller exports NG signals, and the piston rod of cylinder is stretched
Go out, the workpiece detected on PCB is ejected to defective products area.
Further, the capture card includes multiple acquisition ports, the multiple acquisition port and the multiple optical coupling
Device connects one to one.
Seen from the above description, the voltage value of multiple photo-couplers is acquired respectively by multiple acquisition ports, behind pass through again
AD conversion module is individually calculated, and testing staff can directly judge that workpiece is each according to the numerical value that AD conversion module measures
The corresponding flatness in position.
Further, further include more than two calibrated bolcks for verifying accuracy of detection, the calibrated bolck and work to be measured
The shape of part is identical.
Seen from the above description, before detecting workpiece, first with calibrated bolck the detection device can be integrally detected and
Calibration, to ensure accuracy when workpiece sensing.
Further, further include storage device and display device, the storage device and display device are all connected to described
Computing device.
Seen from the above description, the correlation values for the workpiece surveyed can be recorded and preserved by the storage device,
So that testing staff is compared and analyzes to a collection of workpiece;The display device can directly show the result measured progress screen
Show, so that testing staff monitors in real time.
A method of flatness detection is carried out using above-mentioned flatness checking device, is included the following steps:
S1, the shape and workpiece for measurement that multiple photo-couplers are set, and multiple photo-couplers is made to surround on detection pcb board
The shape of peripheral wall is consistent;
S2, workpiece is placed on photo-coupler, all photo-couplers is made to be powered, capture card is used in combination to acquire each optical coupling
The voltage value that device measures;
S3, each voltage value is transmitted to AD conversion module, the voltage value that capture card is collected by AD conversion module calculates
The measured value of planeness of workpiece can be directly displayed by being converted to.
Seen from the above description, which requires the technology of testing staff relatively low, and accuracy of detection is high, and detects speed
Degree is fast, is conducive to improve production efficiency.
Further, further include step S0 before step S1:Three calibrated bolcks are placed individually on photo-coupler, point
The voltage value for not acquiring photo-coupler with capture card, is used in combination AD conversion module to calculate the measured value of each calibrated bolck, while AD
Conversion module demarcates three measured values respectively, then takes one of calibrated bolck to be positioned over photo-coupler again enterprising
Row measures, and whether the measured value seen is consistent with the numerical value demarcated before, if inconsistent, to AD conversion module or optocoupler
Clutch is adjusted, and is then repeated the above steps;If consistent, carry out in next step.
Seen from the above description, before measuring workpiece, detection device is integrally verified with calibrated bolck, sees the detection
How are the sensitivity of device and accuracy, in the survey for carrying out workpiece under the premise of ensureing sensitivity and the accuracy of detection device
Amount, ensures the accuracy of workpiece calibration.
Further, further include step S4:Obtained measured value and preset numberical range are compared, if
Obtained measured value is fallen in preset numberical range, then the workpiece is put into certified products area;If obtained measurement number
Value exceeds preset numberical range, then the workpiece is put into defective products area.
Embodiment one
Referring to Fig.1 and 2, the embodiment of the present invention one is:A kind of flatness checking device, for detecting workpiece for measurement
The flatness of peripheral wall.
The flatness checking device includes control cabinet 3, winding displacement, detection pcb board 1, multiple photo-couplers 11,5 and of jig plate
Computer.The jig plate 5 is fixed on a board, and the detection pcb board 1 is fixed on the jig plate 5, the multiple optocoupler
The shape that is surrounded of the clutch 11 on detection pcb board 1 is consistent with the shape of the peripheral wall of workpiece for measurement.The photo-coupler 11 wraps
Diode end and triode end are included, the diode end is infrared emitting end, and the triode end is infrared receiver end, institute
The triode end for stating photo-coupler 11 is arranged close to the outside of the detection pcb board 1, and the diode end of the photo-coupler 11 is leaned on
The inside setting of the nearly detection pcb board 1.That is the receiving terminal of photo-coupler 11 is placed in optocoupler arrangement outside, makes light
The state of coupling detection is close, to improve accuracy of detection.The multiple photo-coupler 11 is connected with the detection pcb board 1 by circuit
It connects, the control cabinet 3 is connect by winding displacement with the detection pcb board 1.
Specifically, including capture card 31 and power supply in the control cabinet 3, the power supply is used to detect to entire flatness and fill
Power supply is set, the capture card 31 includes multiple acquisition ports, and the multiple acquisition port and the multiple photo-coupler 11 are one by one
It is correspondingly connected with.In the present embodiment, the number of the photo-coupler 11 is 24, then the number of acquisition port is also the same
It it is 24,24 ports separately acquire the analog signal of each photo-coupler 11.Testing staff will be to be measured
Workpiece is placed on detection pcb board 1, and keeps the peripheral wall of workpiece for measurement corresponding with each photo-coupler 11, each photo-coupler
11 can according to light transmission capacity number so that loop current in detection pcb board 1 is generated variation, so as to cause the change of loop voltage value
Change.
The computer includes AD conversion module 4, storage device and display device, the AD conversion module 4 and the acquisition
Block the connection of 31 signals, the AD conversion module 4 is used to the analog signal (voltage value) that capture card 31 is collected into being converted to number
Signal (measurement of planeness numerical value).The storage device and display device are all connected to the computing device, the storage device
4 calculated data of AD conversion module can be stored, so that testing staff consults at any time;The display device can turn AD
Mold changing 4 calculated data of block are shown on computer screen, so that testing staff monitors in real time.
Further, which further includes PLC controller 2, the cylinder 6 for removing defective products, output
Relay 33, trigger relay 32,5V power supplys and 24V power supplys, the output relay 33, trigger relay 32,5V power supplys and
24V power supplys may be contained in the control cabinet 3, and the 24V power supplys are connected to trigger relay 32, for being trigger relay 32
Power supply, the trigger relay 32 are connected between the PLC controller 2 and the capture card 31, and PLC controller 2 passes through journey
Sequence controls the switch of trigger relay 32, and situation is acquired to the data of photo-coupler 11 to control capture card 31.The cylinder 6
It is set to a side of the detection pcb board 1, the piston rod face check bit of the cylinder 6, that is to say, that when workpiece for measurement is put
When being placed on photo-coupler 11, the piston rod face workpiece for measurement of cylinder 6.Another side of the detection pcb board 1 is provided with not
Non-defective unit concentration zones.The 5V power supplys are connected to the output relay 33, for powering for output relay 33.It is described output after
Electric appliance 33 is connected between the PLC controller 2 and cylinder 6, and the PLC controller 2 connects with the communication of the AD conversion module 4
It connects.When 4 calculated measurement data of AD conversion module exceeds allowable range of error, the PLC controller 2 sends out NG signals,
The output relay 33 controls cylinder 6 and acts, and the workpiece detected on pcb board 1 is headed into defective products concentration zones.
Preferably, which further includes more than two calibrated bolcks for teaching and research accuracy of detection, described
Calibrated bolck is identical as the shape of workpiece for measurement, only flatness difference.In the present embodiment, the number of the calibrated bolck is
Three, before detection, first three calibrated bolcks is respectively placed on the check bit of detection pcb board 1, then uses capture card 31, AD
The measurement data of three calibrated bolcks of conversion module 4 and memory module pair is demarcated and is preserved.Check block is taken out after the completion of calibration,
After only successfully demarcating, detection plate could measure workpiece, so, it is possible the accuracy of detection for ensureing the detection device.
Embodiment two
The present embodiment is a kind of method that the flatness checking device using described in embodiment one carries out flatness detection, packet
Include following steps:
S1, multiple photo-couplers 11 are set on detection pcb board 1, and make the shape that multiple photo-couplers 11 surround and waits for
The shape for surveying workpiece peripheral wall is consistent.
S2, three calibrated bolcks are placed individually on photo-coupler 11, use capture card 31 to acquire photo-coupler 11 respectively
Voltage value calculates the measured value of each calibrated bolck with AD conversion module 4 respectively and is demarcated, then takes one of standard
Block is positioned on photo-coupler 11 and measures again, and whether the measured value seen and the numerical value demarcated before are consistent, if
It is inconsistent, then AD conversion module 4 or photo-coupler 11 are adjusted, are then repeated the above steps;If consistent, carry out next
Step.
The calibrated bolck is identical as the shape of workpiece for measurement, only flatness difference.
S3, workpiece is placed on photo-coupler 11, so that all photo-couplers 11 is powered, is used in combination capture card 31 to acquire each
The voltage value that photo-coupler 11 measures.
S4, voltage value is transmitted to AD conversion module 4, the voltage value that capture card 31 is collected by AD conversion module 4 calculates
Be converted to the measured value for directly displaying planeness of workpiece.
S5, obtained measured value and preset numberical range are compared, if obtained measured value is fallen
In preset numberical range, then the workpiece is put into certified products area;If obtained measured value exceeds preset number
It is worth range, then the workpiece is put into defective products area.
S6, obtained measured value is preserved, and is merely able to be shown in display device.
In conclusion flatness checking device device provided by the invention, simple in structure, be not necessarily to special no part, cost compared with
It is low;It is high using the measurement method measurement efficiency of the measuring device, there is no technology requirement, high certainty of measurement to survey crew.
Example the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this hair
Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, include similarly
In the scope of patent protection of the present invention.
Claims (10)
1. a kind of flatness checking device, which is characterized in that including detection pcb board, winding displacement, capture card and AD conversion module, institute
It states and is provided with multiple photo-couplers on detection pcb board, and multiple photo-couplers are arranged along the corresponding position of workpiece for measurement peripheral wall;Institute
Capture card is stated to connect with the detection pcb board by the winding displacement;The AD conversion module is connect with the acquisition card signal.
2. flatness checking device as described in claim 1, which is characterized in that the photo-coupler includes diode end and three
The triode end at pole pipe end, the photo-coupler is arranged close to the outside of the detection pcb board, the diode of the photo-coupler
Inside setting of the end close to the detection pcb board.
3. flatness checking device as described in claim 1, which is characterized in that further include PLC controller and trigger relay,
The trigger relay is connected between the PLC controller and the capture card.
4. flatness checking device as claimed in claim 3, which is characterized in that further include for remove the cylinder of defective products and
Output relay, the cylinder are set to the side of the detection pcb board;The output relay is connected to the PLC controls
Between device and cylinder, the PLC controller is connected with AD conversion module communication.
5. flatness checking device as described in claim 1, which is characterized in that the capture card includes multiple acquisition ports,
The multiple acquisition port connects one to one with the multiple photo-coupler.
6. flatness checking device as described in claim 1, which is characterized in that further include it is more than two for verify detection
The calibrated bolck of precision, the calibrated bolck are identical as the shape of workpiece for measurement.
7. flatness checking device as described in claim 1, which is characterized in that further include storage device and display device, institute
It states storage device and display device is all connected to the computing device.
8. a kind of method carrying out flatness detection using claim 1-7 any one of them flatness checking devices, special
Sign is, includes the following steps:
S1, multiple photo-couplers are set on detection pcb board, and make the shape that multiple photo-couplers surround and workpiece for measurement peripheral wall
Shape it is consistent;
S2, workpiece is placed on photo-coupler, all photo-couplers is made to be powered, be used in combination capture card to acquire each photo-coupler and survey
The voltage value obtained;
S3, each voltage value is transmitted to AD conversion module, the voltage value that capture card is collected by AD conversion module calculates conversion
For the measured value of planeness of workpiece can be directly displayed.
9. the method for carrying out flatness detection as claimed in claim 8, which is characterized in that before step S2 further include step
S12:Three calibrated bolcks are placed individually on photo-coupler, the voltage value of photo-coupler is acquired with capture card respectively, uses respectively
AD conversion module calculates the measured value of each calibrated bolck and is demarcated, and one of calibrated bolck is then taken to be positioned over light again
It is measured on coupler, whether the measured value judged and the numerical value demarcated before are consistent, if inconsistent, turn to AD
Mold changing block or photo-coupler are adjusted, and then repeat step S12;If consistent, carry out in next step.
10. the method for carrying out flatness detection as claimed in claim 8, which is characterized in that further include step S4:By what is obtained
Measured value is compared with preset numberical range, if obtained measured value is fallen in preset numberical range
It is interior, then the workpiece is put into certified products area;Otherwise, then the workpiece is put into defective products area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810193847.4A CN108692697A (en) | 2018-03-09 | 2018-03-09 | A kind of flatness checking device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810193847.4A CN108692697A (en) | 2018-03-09 | 2018-03-09 | A kind of flatness checking device and method |
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| Publication Number | Publication Date |
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| CN108692697A true CN108692697A (en) | 2018-10-23 |
Family
ID=63844460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810193847.4A Pending CN108692697A (en) | 2018-03-09 | 2018-03-09 | A kind of flatness checking device and method |
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| CN (1) | CN108692697A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117781959A (en) * | 2023-12-26 | 2024-03-29 | 成都宏明双新科技股份有限公司 | Shielding cover Pin Pin flatness detection device and calibration method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10160455A (en) * | 1996-11-27 | 1998-06-19 | Sankyu Inc | System for measuring deformation amount of flange face |
| CN202255263U (en) * | 2011-07-28 | 2012-05-30 | 南昌航空大学 | Visual calibration device for displacement sensor |
| CN102642075A (en) * | 2011-02-22 | 2012-08-22 | 株式会社极动 | Apparatus of determining whether electrode tip is up to standard |
| TW201416641A (en) * | 2012-10-17 | 2014-05-01 | Fih Hong Kong Ltd | Flatness measuring instrument |
| CN205403733U (en) * | 2016-02-16 | 2016-07-27 | 昆山元诚电子材料有限公司 | Lid roughness detection device behind cell -phone |
| CN106441708A (en) * | 2016-12-07 | 2017-02-22 | 贵州黎阳航空动力有限公司 | Double-blade lever type barycenter measuring device and measuring method thereof |
| CN205981177U (en) * | 2016-07-27 | 2017-02-22 | 深圳市森川科技有限公司 | Flatness testing apparatus |
| CN107564463A (en) * | 2016-06-30 | 2018-01-09 | 乐金显示有限公司 | Calibrating installation and method and the OLED including calibrating installation |
-
2018
- 2018-03-09 CN CN201810193847.4A patent/CN108692697A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10160455A (en) * | 1996-11-27 | 1998-06-19 | Sankyu Inc | System for measuring deformation amount of flange face |
| CN102642075A (en) * | 2011-02-22 | 2012-08-22 | 株式会社极动 | Apparatus of determining whether electrode tip is up to standard |
| CN202255263U (en) * | 2011-07-28 | 2012-05-30 | 南昌航空大学 | Visual calibration device for displacement sensor |
| TW201416641A (en) * | 2012-10-17 | 2014-05-01 | Fih Hong Kong Ltd | Flatness measuring instrument |
| CN205403733U (en) * | 2016-02-16 | 2016-07-27 | 昆山元诚电子材料有限公司 | Lid roughness detection device behind cell -phone |
| CN107564463A (en) * | 2016-06-30 | 2018-01-09 | 乐金显示有限公司 | Calibrating installation and method and the OLED including calibrating installation |
| CN205981177U (en) * | 2016-07-27 | 2017-02-22 | 深圳市森川科技有限公司 | Flatness testing apparatus |
| CN106441708A (en) * | 2016-12-07 | 2017-02-22 | 贵州黎阳航空动力有限公司 | Double-blade lever type barycenter measuring device and measuring method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117781959A (en) * | 2023-12-26 | 2024-03-29 | 成都宏明双新科技股份有限公司 | Shielding cover Pin Pin flatness detection device and calibration method |
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