CN112344862A - Corrugated pipe waveform testing device and testing method - Google Patents
Corrugated pipe waveform testing device and testing method Download PDFInfo
- Publication number
- CN112344862A CN112344862A CN202011558813.4A CN202011558813A CN112344862A CN 112344862 A CN112344862 A CN 112344862A CN 202011558813 A CN202011558813 A CN 202011558813A CN 112344862 A CN112344862 A CN 112344862A
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- China
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- electric cylinder
- corrugated pipe
- servo electric
- base
- test piece
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
Abstract
The invention discloses a corrugated pipe waveform testing device, which is characterized in that: the test device comprises a base, wherein a rotary mounting disc for mounting a to-be-tested piece is arranged on the base, a support with a track is further arranged on the base, a lifting motor with a lead screw is arranged above the support, the lead screw is matched with a servo electric cylinder which is connected onto the track in a sliding mode, a high-speed camera is arranged on a cylinder body of the servo electric cylinder, and a distance measuring sensor matched with the to-be-tested piece is arranged at the movable end of the servo electric cylinder. The structure of the invention can effectively solve the complex work of manual clamping, measuring and recording for many times in the high-frequency waveform testing work of the corrugated pipe in the corrugated pipe production enterprises and related detection mechanisms at present. The measurement and recording processes are automatically completed by equipment, the influence of different checking tools of different people on the measurement result in the past manual measurement is changed, and the efficient, accurate and stable measurement of the waveform of the corrugated pipe is realized.
Description
Technical Field
The invention belongs to the technical field of corrugated pipe testing equipment, and particularly relates to a corrugated pipe waveform testing device and a corrugated pipe waveform testing method, which are used for measuring waveform changes of a corrugated pipe under pressure.
Background
The expansion joint is a compensation element for absorbing the size change of a pipeline by utilizing the telescopic deformation of a corrugated pipe, and the waveform size of the corrugated pipe and the change of the waveform under the action of pressure are important parameters for judging whether the expansion joint is qualified or not.
The existing corrugated pipe waveform is mainly measured by manually marking wave crests, and measuring and recording are carried out manually and repeatedly for many times by using calipers and the like, so that the measuring result is greatly influenced by human factors. Even if an optical measurement method is adopted, the problem that after the pressure of the corrugated pipe is applied, the original wave peak point is shifted, the distance is changed and identified cannot be solved, so that the deviation of the measurement result is caused, and the performance index of the corrugated pipe cannot be accurately reflected.
Disclosure of Invention
The invention aims to provide a corrugated pipe waveform testing device and a corrugated pipe waveform testing method, which are used for solving the existing problems.
The invention is realized by the following technical scheme: a corrugated pipe waveform testing device is characterized in that: the test device comprises a base, wherein a rotary mounting disc for mounting a to-be-tested piece is arranged on the base, a support with a track is further arranged on the base, a lifting motor with a lead screw is arranged above the support, the lead screw is matched with a servo electric cylinder which is connected onto the track in a sliding manner, and a distance measuring sensor and a high-speed camera which are matched with the to-be-tested piece are arranged on the servo electric cylinder.
The invention also discloses a corrugated pipe waveform testing method, which adopts the device and is characterized in that: comprises the following steps of (a) carrying out,
s1, vertically mounting the test piece on a rotating table,
s2, adjusting the focal distance of laser ranging by the servo electric cylinder according to the drift diameter of the test piece, inputting the length of the test piece, driving the measuring device to move to the top end of the test piece by the vertical servo, starting the servo to move downwards slowly from the top, finding the minimum value and the maximum value of the distance, namely the wave crest and the wave trough, and marking;
s3, when the device is operated to the bottom of the device, marking is finished, and meanwhile, laser measurement data and vertical servo data in the whole process are combined to generate an initial waveform curve;
s4, after the test piece is subjected to other tests, the test piece is reinstalled,
and S5, operating the lifting motor to drive the servo electric cylinder to move from top to bottom, identifying the mark position through the high-speed camera, feeding back to the distance measuring sensor, collecting data of the servo electric cylinder vertically operating when a feedback signal is generated, comparing the data with the previous measured data, and calculating the wave distance change rate.
The invention has the advantages that: the structure of the invention can effectively solve the complex work of manual clamping, measuring and recording for many times in the high-frequency waveform testing work of the corrugated pipe in the corrugated pipe production enterprises and related detection mechanisms at present. The measurement and recording processes are automatically completed by equipment, the influence of different checking tools of different people on the measurement result in the past manual measurement is changed, and the efficient, accurate and stable measurement of the waveform of the corrugated pipe is realized.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
The sequence numbers in the figures illustrate: 1-a lifting motor; 2-a distance measuring sensor; 3-servo electric cylinder; 4-a high-speed camera; 5-a lead screw; 6-rotating the mounting disc; 7-a rotating electrical machine; 8-a base; 9-track.
Detailed Description
Fig. 1 shows a corrugated pipe waveform testing device of the present invention, which includes a base 8, a rotary mounting plate 6 is arranged on the base, a rotary shaft is arranged at the lower part of the rotary mounting plate, the rotary shaft is matched with the base through a bearing, the rotary shaft penetrates through the upper surface of the base to be matched with a rotary motor 7 arranged in the base and is driven to rotate by the rotary motor, and a fixing structure, such as a flange hole, etc., matched with a to-be-tested piece is arranged on the rotary mounting plate; the base is further fixed with a support, a track 9 is vertically arranged on the support, a lifting motor 1 with a lead screw 5 is arranged above the support, the lead screw is matched with a servo electric cylinder 3 which is connected on the track in a sliding mode, a distance measuring sensor 2 matched with a to-be-tested part is arranged at the free end of the servo electric cylinder, and a high-speed camera 4 is arranged on the lower side of the servo electric cylinder. The distance measuring sensor adopts a high-speed high-precision LK-G402 focusing light spot type laser displacement sensor of Kenzhi company, the sampling frequency of the sensor is as high as 50KHz, the repetition precision is 2 mu m, and reliable real-time data can be provided for motion modeling. The cameras are Keynes CA-H2100MX, 2100 ten thousand pixels and 16 times speed black and white cameras, the vision system main unit adopts a Keynes XG-X product, and the Visoneditor software is used for image processing, so that the rapid detection and processing of images can be ensured.
The invention also discloses a corrugated pipe waveform testing method, which adopts the device and comprises the following steps,
s1, vertically mounting the test piece on a rotating table,
s2, adjusting the focal distance of laser ranging by the servo electric cylinder according to the drift diameter of the test piece, inputting the length of the test piece, driving the measuring device to move to the top end of the test piece by the vertical servo, starting the servo to move downwards slowly from the top, finding the minimum value and the maximum value of the distance, namely the wave crest and the wave trough, and marking; the mark can be carried out by a manual or automatic code spraying mode;
s3, when the device is operated to the bottom of the device, marking is finished, and meanwhile, laser measurement data and vertical servo data in the whole process are combined to generate an initial waveform curve;
s4, after the test piece is subjected to other tests, the test piece is reinstalled;
and S5, operating the lifting motor to drive the servo electric cylinder to move from top to bottom, identifying the mark position through the high-speed camera, feeding back to the distance measuring sensor, acquiring data of vertical operation and horizontally extending data of the servo electric cylinder when a feedback signal is generated, comparing the data with the previous measured data, and calculating the wave distance change rate.
The present invention will be further described with reference to the principles and operation of the illustrated construction.
The structure of the invention mainly comprises a test piece rotating mechanism and a sensor moving mechanism. The test piece rotating mechanism comprises a main body support and a rotating disc, wherein a servo motor is connected with the test piece mounting disc through a coupling structure to drive the disc to rotate, the disc can accurately move at a constant speed and a constant angle of 360 degrees, and the requirement of multi-angle and multi-time measurement of the same test piece is met. The design of the test piece mounting disc is that the meter-shaped mounting groove can be suitable for mounting and testing corrugated pipes of various sizes. The sensor moving mechanism mainly uses two-axis movement with the sensor, the vertical movement is used for measuring waveform data, and the horizontal movement is used for adjusting the distance between the sensor and a tested piece. The horizontal movement adopts an electric cylinder structure to drive the sensor, so that the optimal working distance between the sensor and a workpiece is ensured, and meanwhile, no mechanism is interfered with the tested piece when the sensor retreats. The vertical motion adopts a precise screw slide seat structure, and the slide seat drives a horizontal motion mechanism to further drive a sensor to complete the measurement of the waveform in the vertical direction. The two shafts are driven by servo to complete the precise motion at constant speed and distance.
A waveform curve database is established by collecting the measurement data of the laser displacement sensor and the movement distance data in the servo vertical direction, and then wave distance change rates under different conditions are calculated by comparing the data of multiple waveforms before and after the marking position of the high-speed camera.
The core of the measurement is that the high-precision laser displacement sensor completes relative motion in the vertical direction of the corrugated pipe at a proper measurement distance, the measurement data of the laser displacement sensor and the motion distance data in the servo vertical direction are collected into an upper computer in real time, a corresponding curve, namely the waveform of the corrugated pipe, is generated through a program designed by LabVIEW software, and the extraction and storage of the wave distance data of the test piece are completed. The lower computer adopts Schneider PLC as a platform, is provided with 40 digital quantity input and output interfaces to complete the control of other sensors, air valves, alarm devices and the like, and is provided with a CAN bus interface for communicating with the rotary platform and three servos in the vertical and horizontal directions of the sensors to complete the high-speed control and monitoring of a plurality of servos.
In the testing process, a test piece is vertically installed on the rotating table, the servo electric cylinder operates to adjust the focal distance of laser ranging according to the drift diameter of the test piece, the vertical servo drives the measuring device to move to the top end of the test piece according to the length of the test piece, the servo starts to move downwards slowly from the top, the wave crest and the wave trough are found, the light spot of the laser ranging stops, a marking line is made according to the position of the light spot, when the test piece operates to the bottom of the device, the marking is finished, and meanwhile, laser measuring data and vertical servo data in the whole process are combined to generate an initial waveform curve. And after other tests and pressing are finished, the test piece is reinstalled, the measuring device runs at a low speed, the high-speed camera feeds back and stops the measuring device from top to bottom according to the number of the marking lines, the vertically running data is collected and compared with the previous measured data, and the wave distance change rate is calculated.
The structure of the invention can effectively solve the complex work of manual clamping, measuring and recording for many times in the high-frequency waveform testing work of the corrugated pipe in the corrugated pipe production enterprises and related detection mechanisms at present. The measurement and recording processes are automatically completed by equipment, the influence of different checking tools of different people on the measurement result in the past manual measurement is changed, and the efficient, accurate and stable measurement of the waveform of the corrugated pipe is realized.
Claims (5)
1. A corrugated pipe waveform testing device is characterized in that: the test device comprises a base, wherein a rotary mounting disc for mounting a to-be-tested piece is arranged on the base, a support with a track is further arranged on the base, a lifting motor with a lead screw is arranged above the support, the lead screw is matched with a servo electric cylinder which is connected onto the track in a sliding mode, a high-speed camera is arranged on a cylinder body of the servo electric cylinder, and a distance measuring sensor matched with the to-be-tested piece is arranged at the movable end of the servo electric cylinder.
2. The bellows waveform testing apparatus of claim 1, wherein: the rotary mounting disc is connected to the base in a rotating mode, and a rotary motor used for driving the rotary mounting disc to rotate is further arranged on the base.
3. The bellows waveform testing apparatus of claim 1, wherein: the piece to be tested is fixed on the rotary mounting disc through a flange.
4. The bellows waveform testing apparatus of claim 1, wherein: and a marker is also arranged at the movable end of the servo electric cylinder.
5. A corrugated pipe waveform testing method using the apparatus of claim 1 or 2 or 3, wherein: comprises the following steps of (a) carrying out,
s1, vertically mounting the test piece on a rotating table,
s2, adjusting the focal distance of the distance measuring sensor by the servo electric cylinder according to the drift diameter of the test piece, driving the measuring device to move to the top end of the test piece by the vertical servo according to the length of the test piece, starting the servo to move downwards slowly from the top, finding the minimum value and the maximum value of the distance, namely the wave crest and the wave trough, and marking;
s3, when the device is operated to the bottom of the device, marking is finished, and meanwhile, laser measurement data and vertical servo data in the whole process are combined to generate an initial waveform curve;
s4, after the test piece is subjected to other tests, the test piece is reinstalled,
and S5, operating the lifting motor to drive the servo electric cylinder to move from top to bottom, identifying the mark position through the high-speed camera, feeding back to the distance measuring sensor, collecting data of the servo electric cylinder vertically operating when a feedback signal is generated, comparing the data with the previous measured data, and calculating the wave distance change rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011558813.4A CN112344862A (en) | 2020-12-25 | 2020-12-25 | Corrugated pipe waveform testing device and testing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011558813.4A CN112344862A (en) | 2020-12-25 | 2020-12-25 | Corrugated pipe waveform testing device and testing method |
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| Publication Number | Publication Date |
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| CN112344862A true CN112344862A (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011558813.4A Pending CN112344862A (en) | 2020-12-25 | 2020-12-25 | Corrugated pipe waveform testing device and testing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115290002A (en) * | 2022-10-10 | 2022-11-04 | 江苏新恒基特种装备股份有限公司 | Device and method for quickly and accurately detecting shape and size of large-diameter multi-corrugated pipe |
-
2020
- 2020-12-25 CN CN202011558813.4A patent/CN112344862A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115290002A (en) * | 2022-10-10 | 2022-11-04 | 江苏新恒基特种装备股份有限公司 | Device and method for quickly and accurately detecting shape and size of large-diameter multi-corrugated pipe |
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Address after: 110000 No.85, No.23, Kaifa Road, Shenyang Economic and Technological Development Zone, Liaoning Province Applicant after: Zhongliao testing (Liaoning) Co.,Ltd. Address before: 110000 No.85, No.23, Kaifa Road, Shenyang Economic and Technological Development Zone, Liaoning Province Applicant before: SHENYANG ZHONGHE DETECTION Co.,Ltd. |