CN115265355B - Parallelism measuring device and calibration method thereof - Google Patents
Parallelism measuring device and calibration method thereof Download PDFInfo
- Publication number
- CN115265355B CN115265355B CN202210802706.4A CN202210802706A CN115265355B CN 115265355 B CN115265355 B CN 115265355B CN 202210802706 A CN202210802706 A CN 202210802706A CN 115265355 B CN115265355 B CN 115265355B
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000523 sample Substances 0.000 claims abstract description 47
- 238000006073 displacement reaction Methods 0.000 claims abstract description 33
- 238000005259 measurement Methods 0.000 claims abstract description 23
- 238000007405 data analysis Methods 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000010146 3D printing Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000011326 mechanical measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a parallelism measuring device and a calibration method thereof, wherein the device comprises a data acquisition module, a data analysis module and a calibration table; the data acquisition module comprises an eddy current displacement sensor probe, an extension cable and a sensor mounting frame; the eddy current displacement sensor probes are paired in pairs, and the eddy current displacement sensor probes of a plurality of pairs are oppositely arranged on the sensor mounting frame; the data analysis module comprises an eddy current displacement sensor front end processor, a converter and an upper computer; the extension cable is connected with the eddy current displacement sensor probe and the front end processor; the converter completes data communication between the current vortex displacement sensor front-end processor and the upper computer; the upper computer is used for processing and analyzing data acquired by the eddy current displacement sensor probe so as to acquire the parallelism of two planes to be measured; the calibration stand comprises two surfaces to be measured which are parallel to each other, and the distance between the two surfaces to be measured is known. Compared with manual measurement, the invention not only simplifies the measurement flow, but also improves the measurement precision.
Description
Technical Field
The invention belongs to the technical field of measurement, and particularly relates to a parallelism measuring device and a calibration method thereof.
Background
For measuring the thickness of the gasket of the air bag vibration isolator, the traditional measuring mode is manual measurement, the distance between the lower mounting surface of the raft frame and the mounting surface of the base is measured through a mechanical ruler, and the height of the air bag vibration isolator is subtracted, so that the thickness of the gasket is adjusted, and the main measuring tools are calipers, micrometers, vernier calipers and the like.
The current practical measurement method is to measure four points at the corners of the mounting surface, then determine the thickness dimension of the gasket by the basic principle of three-point surface formation, pre-mount the gasket after manufacturing, and then manually grind the gasket until the mounting of the air bag vibration isolator meets the low-noise mounting requirement. The adjusting gasket manufactured by the mechanical ruler measuring method mainly has the following problems: ① Because of adopting manual mechanical measurement, the measurement precision cannot be ensured, and the manufacturing error of the adjusting gasket is large, so that the raft frame and the equipment are affected; ② Because the measurement sampling points of the adjusting gasket are only four points, the reconstruction of the gasket mounting surface is only determined by three points, and the effective contact between the adjusting gasket mounting surface and the mounting surface cannot be ensured; ③ The labor intensity of workers is high, the efficiency is low, and errors are extremely easy to occur.
Therefore, in order to improve the quality and efficiency of the installation of the airbag, it is very urgent and important to design a parallelism measuring apparatus capable of automatically measuring the plane gap.
Disclosure of Invention
The invention aims to provide a parallelism measuring device and a calibration method thereof, which solve the problem of automatic and accurate measurement of plane gaps.
The technical scheme adopted by the invention is as follows:
A parallelism measuring apparatus comprising: the device comprises a data acquisition module, a data analysis module and a calibration table. Wherein:
The data acquisition module comprises an eddy current displacement sensor probe, an extension cable and a sensor mounting frame and is used for acquiring data.
The data analysis module comprises an eddy current displacement sensor front end processor, a power supply, an upper computer and a data analysis module mounting frame and is used for processing acquired data to obtain measurement and analysis results.
The calibration table comprises a metal plate surface and bolts, wherein the metal plate surface and the bolts are the same as the plane to be measured in material, and the metal plate surface and the bolts are used for acquiring compensation data before measuring a target plane.
Preferably, the eddy current displacement sensor probe is secured to the sensor mounting frame by two nut and two washer clamps.
Preferably, the sensor mounting frame forms an integral frame structure by 3D printing of non-metallic material.
Preferably, the sensor mounting frame is provided with 22 eddy current displacement sensor probe mounting holes, 11 holes are respectively arranged between the upper plate and the lower plate, and the positions are in a group correspondingly from top to bottom; four bearing columns are positioned at four corners of the data acquisition module; 22 support columns in total, wherein each two support columns are positioned at the left and right sides of a pair of probe mounting holes; the 8 cable fixing holes are positioned at four corners of the data acquisition module.
Preferably, the bearing posts should have bolt mounting holes for securing the data acquisition module during measurement.
Preferably, the calibration table is composed of two high-precision metal plates and four full-grain bolts, and the metal plates are clamped and fixed through nuts so as to adjust the metal plate gap of the calibration table.
Preferably, the frame of the data analysis module should be able to mount 22 sensor pre-ambles for processing the entire sensor signal.
Preferably, an extension cable of the sensor is used to connect the probe with the pre-processor.
Preferably, the data analysis module should include an RS232 to RS485 converter, and the communication between the host computer and the eddy current displacement sensor is realized by connecting the host computer and the converter through a communication cable.
Preferably, the power module of the data analysis module can convert alternating current 220V into direct current 12V to supply power for the eddy current displacement sensor.
The invention also provides a calibration method of the parallelism measuring device, so as to obtain more accurate calibration data and measurement results, comprising the following steps:
S1, placing a calibration table in a relatively flat place;
s2, completely placing the data acquisition module into a calibration table;
Step S3, turning on a power supply and turning on a device to obtain the distance h 1 from the probe 1 of each group of sensors to the surface 1 to be measured, and the distance h 2 from the probe 2 to the surface 2 to be measured;
And S4, knowing the metal layout gap H of the calibration table, wherein the installation distance between each group of probes, namely the calibration data is H 3＝H-h1-h2.
Compared with the prior art, the invention has the following advantages:
According to the invention, by installing 11 pairs of eddy current displacement sensors, the distance between each group of sensor probes and the surface of a metal object to be measured is measured, and the distance between the group of sensor probes is added to obtain the relative position of the measuring point between two planes of a target. The eddy current displacement sensor senses the relative position and processes the relative position into corresponding electric signals to output, so that the eddy current displacement sensor has the advantages of high sensitivity, strong anti-interference capability, non-contact measurement, high response speed, no influence by factors such as oil water and the like. When in measurement, firstly, the data acquisition module is put into a calibration table, and a power key is pressed to acquire calibration data, namely the distance between each group of sensor probes; and secondly, putting the data acquisition module into a target plane to acquire measurement data, and displaying measurement and analysis results on a software interface of the upper computer. The data acquisition module mounting frame of the device adopts a 3D printing nonmetallic material to form an integrated frame structure, has the advantages of good rigidity and portability, and ensures the service performance of the device; the method is simple and portable in use, and compared with manual measurement, the method not only simplifies the measurement flow, but also improves the measurement accuracy.
Drawings
FIG. 1 is a schematic diagram of a data acquisition module;
fig. 2 is a calibration schematic.
In the figure: the sensor comprises a 1-sensor mounting frame, a 2-sensor probe, a 3-nut, a 4-sensor mounting hole, a 5-support column, a 6-bolt mounting hole, a 7-sensor cable fixing hole and an 8-bearing column.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The invention aims to provide a parallelism measuring device and a calibration method thereof, wherein the distance between two planes of a measuring point is obtained by measuring the distance between a probe and a measured plane through a sensor, so that the parallelism of a symmetrical metal plane is calculated.
The parallelism measuring device of the embodiment of the invention, as shown in fig. 1, comprises a data acquisition module, a data analysis module and a calibration table. The data acquisition module comprises a sensor mounting frame 1 and an eddy current displacement sensor probe 2; the sensor probe 2 is fixed on the sensor mounting frame 1 through the sensor probe mounting hole 4 by the nut 3, the rigidity of the device is kept by two support columns 5 on the left and right of the sensor probe 2, and the sensor mounting frame 1 comprises a sensor cable fixing hole 7 and a bearing column 8; the bearing post 8 should contain a bolt mounting hole 6 through which the data acquisition module is secured in use.
As shown in fig. 2, the present embodiment further provides a calibration method of the parallelism measuring apparatus, specifically, the distance h3 between each group of sensor probes is obtained, and the steps of obtaining calibration data include:
S1, placing a calibration table in a relatively flat place;
s2, completely placing the data acquisition module into a calibration table;
Step S3, turning on a power supply and turning on a device to obtain the distance h 1 from the probe 1 of each group of sensors to the surface 1 to be measured, and the distance h 2 from the probe 2 to the surface 2 to be measured;
And S4, knowing the metal layout gap H of the calibration table, wherein the installation distance between each group of probes, namely the calibration data is H 3＝H-h1-h2.
The using method of the parallelism measuring device comprises the following steps:
The method comprises the steps that a data acquisition module provided with 11 pairs of eddy current displacement sensors is placed in a calibration table, a power key is pressed to start a parallelism measuring device, an alternating current is provided for a probe inner coil by a front-end device through an extension cable, a magnetic field is formed around the probe inner coil, an eddy current is excited by a conductor around the magnetic field, the eddy current is opposite to the magnetic field direction of the coil, and therefore the impedance value of the probe inner coil is changed and is directly related to the distance from the coil to a measured object; the change of the impedance of the coil, namely the change of the distance between the head body coil and the metal conductor is converted into the change of voltage or current through the processing of the electronic circuit of the front-end processor, the corresponding distance value is calculated and processed into corresponding electric signal output, RS232 is converted into RS485 through the converter, and the converter and the upper computer are connected through a communication cable to transmit signals. The software part of the upper computer obtains the distance H 1 from the probe 1 of each group of sensors to the surface 1 to be measured, the distance H 2 from the probe 2 to the surface 2 to be measured, and the standard height H of the calibration platform is known, namely calibration data H 3＝H-h1-h2; then the data acquisition module is put between two planes to be measured for measurement, the distance H 1 between the probe 1 of each group of sensors and the measured surface 1 is measured, the distance H 2 between the probe 2 and the measured surface 2 is measured, and the gap H between the two planes on the measuring point is obtained as follows: h=h 1+h2+h3.
In summary, the invention discloses a parallelism measuring device and a calibration method thereof, which are used for solving the problem of automatically measuring the multipoint distance between two planes. The device is divided into a data acquisition module, a data analysis module and a calibration table; meanwhile, a calibration method of the parallelism measuring device is provided. Before measuring the target plane, placing the data acquisition module into a calibration table, starting a device, transmitting the acquired target data into the data analysis module, and storing the data; and then the calibrated data acquisition module is placed between two planes to be measured to acquire measurement data, the data is transmitted to the data analysis module for processing, and the analysis results after the measurement data and the data compensation are displayed on a software interface of the data analysis module. The data acquisition module mounting frame of the device adopts a 3D printing nonmetallic material to form an integrated frame structure, has the advantages of good rigidity and portability, and ensures the service performance of the device; the invention is simple, flexible and convenient to operate in use; the method has the advantages of high measurement accuracy and high reaction speed in the result.
It will be readily appreciated by those skilled in the art that the foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The parallelism measuring device is characterized by comprising a data acquisition module, a data analysis module and a calibration table;
The data acquisition module comprises an eddy current displacement sensor probe, an extension cable and a sensor mounting frame; the eddy current displacement sensor probes are pairwise paired, and the eddy current displacement sensor probes of a plurality of pairs are oppositely arranged on the sensor mounting frame and are used for collecting data;
The data analysis module comprises an eddy current displacement sensor front end processor, a converter and an upper computer; the extension cable is connected with the eddy current displacement sensor probe and the eddy current displacement sensor front-end processor; the converter completes data communication between the current vortex displacement sensor front-end processor and the upper computer; the upper computer is used for processing and analyzing data acquired by the eddy current displacement sensor probe so as to acquire the parallelism of two planes to be measured;
the calibration platform comprises two surfaces to be tested which are parallel to each other, and the distance between the two surfaces to be tested is known; the calibration platform is used for calibrating the parallelism measuring device so as to acquire the installation distance between the probe pairs of the eddy current displacement sensor and transmit the installation distance to the upper computer.
2. The parallelism measuring apparatus according to claim 1, wherein the sensor mounting frame includes an upper mounting plate, a lower mounting plate, a support column, and a bearing column; the upper mounting plate and the lower mounting plate are provided with opposite probe mounting holes for mounting paired eddy current displacement sensor probes; the support column is located relative probe mounting hole both sides and connects mounting panel and mounting panel down for support mounting panel and mounting panel down, and the spanners are located mounting panel four corners down, and every spanners still is equipped with a bolt locating hole for fixed sensor mounting frame when measuring.
3. The parallelism measuring apparatus according to claim 2, wherein each of the eddy current displacement sensor probes is clamped and fixed at the probe mounting hole by two nuts and two washers.
4. The parallelism measuring apparatus according to claim 2, wherein the sensor mounting frame is an integrated frame structure formed by 3d printing of a nonmetallic material.
5. The parallelism measuring apparatus of claim 1, wherein the data analysis module further comprises a data analysis module mounting frame for mounting the stationary eddy current displacement sensor head, the transducer and the host computer.
6. The parallelism measuring apparatus according to claim 1, wherein the calibration stage comprises two high-precision metal plates and four full-grain bolts; the space between the two metal plates of the calibration table is adjusted by clamping and fixing the metal plates through nuts on the full-grain bolts.
7. A method for calibrating a parallelism measuring apparatus according to any one of claims 1 to 6, characterized by comprising the steps of:
S1, placing a calibration table in a relatively flat place;
S2, placing the data acquisition module into a calibration table;
S3, obtaining distances h 1 and h 2 between each pair of eddy current displacement sensor probes and two measured surfaces of the calibration table;
And S4, calibrating the space between the two measured surfaces of the table to be H, wherein the mounting distance between each pair of eddy current displacement sensor probes, namely the calibration data is H 3＝H-h1-h2.
8. The method for calibrating a parallelism measuring apparatus according to claim 7, wherein the data acquisition module is placed between two planes to be measured during measurement to acquire the distances between each pair of eddy current displacement sensor probes and the two surfaces to be measured, and the distances between the two planes to be measured are obtained by adding the distances to the calibration data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210802706.4A CN115265355B (en) | 2022-07-07 | 2022-07-07 | Parallelism measuring device and calibration method thereof |
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| CN202210802706.4A CN115265355B (en) | 2022-07-07 | 2022-07-07 | Parallelism measuring device and calibration method thereof |
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| CN115265355A CN115265355A (en) | 2022-11-01 |
| CN115265355B true CN115265355B (en) | 2024-09-20 |
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| CN116625280B (en) * | 2023-07-26 | 2023-10-10 | 中国汽车技术研究中心有限公司 | Collision dummy shoulder joint rotating shaft parallelism and coaxiality measuring tool and measuring method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1217327A2 (en) * | 2000-12-20 | 2002-06-26 | Laboratoire Central Des Ponts Et Chaussees | Method and device for the measurement of the evenness of a surface |
| CN106989660A (en) * | 2017-05-24 | 2017-07-28 | 大连理工大学 | A kind of space three-dimensional information acquisition method of complicated position metal flat |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1141654B1 (en) * | 1998-12-18 | 2005-03-02 | Micro-Epsilon Messtechnik GmbH & Co. KG | Operating an eddy current sensor |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1217327A2 (en) * | 2000-12-20 | 2002-06-26 | Laboratoire Central Des Ponts Et Chaussees | Method and device for the measurement of the evenness of a surface |
| CN106989660A (en) * | 2017-05-24 | 2017-07-28 | 大连理工大学 | A kind of space three-dimensional information acquisition method of complicated position metal flat |
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