CN211668431U - Integrated composite probe for detecting deformation of pipeline - Google Patents

Abstract

The utility model discloses an integration pipeline warp internal test composite probe, including pulse eddy current testing module and magnetic rotary encoding detection module, its characterized in that: the upper portion of pulse eddy current test module is equipped with pulse eddy current deformation sensor, and pulse eddy current deformation sensor's sub-unit connection has the vortex detection unit casing, pulse eddy current deformation sensor's upper portion is equipped with compound magnetic field detecting element, the upper portion of magnetic rotation code detecting module is equipped with the magnetic rotation code detecting element protective housing, the inside magnetic rotation structure that is equipped with of magnetic rotation code detecting element protective housing, radial magnet is installed to a magnetic rotation structure tip, magnetic rotation code detecting element protective housing inboard is equipped with hall chip, the utility model discloses increase the magnetic detection component of two symmetric distributions on the probe protective housing, increase pipeline detection's circumference precision based on pulse eddy current detection's principle, realize the three-dimensional reconsitution of pipeline deformation profile to improve and detect the precision.

Description

An integrated pipeline deformation internal detection composite probe

technical field

The utility model relates to the technical field of pipeline deformation detection, in particular to an integrated pipeline deformation internal detection composite probe.

Background technique

Many pipelines are buried underground. Due to the influence of factors such as changes in geological conditions and pipeline corrosion, defects such as deformation, bending displacement and corrosion of the pipeline will occur. When these defects accumulate to a certain extent, the pipeline will rupture. It leads to accidents and endangers public property and life safety. Therefore, it is necessary to use pipeline inspection equipment to regularly inspect the inside of the pipeline, so as to ensure the safe operation of the pipeline, timely and accurate detection of problems in the pipeline, and prolong the pipeline's life. The traditional detection probe has low measurement accuracy and can only detect the maximum deformation of the pipeline, but cannot detect the deformation of the pipeline near the maximum deformation.

Utility model content

The purpose of the utility model is to provide an integrated pipeline deformation internal detection composite probe to solve the problem that the traditional detection probe has a relatively low measurement accuracy and can only detect the maximum deformation amount of the pipeline deformation, but cannot detect the pipeline deformation near the maximum deformation.

In order to achieve the above purpose, the utility model provides the following technical scheme: an integrated pipeline deformation inner detection composite probe, comprising a pulsed eddy current detection module and a magnetic rotation coding detection module, characterized in that: the upper part of the pulsed eddy current detection module is provided with A pulsed eddy current deformation sensor, and the lower part of the pulsed eddy current deformation sensor is connected with an eddy current detection unit casing, the upper part of the pulsed eddy current deformation sensor is provided with a composite magnetic field detection unit, and one end of the eddy current detection unit casing is fixedly connected with a connecting frame, And the other end of the connecting frame is connected with the clamping mechanism. The lower side of the clamping mechanism is connected with a four-bar mechanism. A magnetic rotation structure is arranged inside the protective shell of the coding detection unit, a radial magnet is installed at one end of the magnetic rotary structure, a Hall chip is arranged inside the protective shell of the magnetic rotary coding detection unit, and the protective shell of the magnetic rotary coding detection unit is provided. The lower part is connected to the base.

Preferably, the pulsed eddy current deformation sensor is composed of a TMR2503 magnetic flux tunnel chip, an amplifier circuit and a filter circuit, and the lower part of the pulsed eddy current deformation sensor is provided with two excitation coils wound with enameled wires, and the pulsed eddy current deformation sensor is used to detect the magnetic field. The size of the strength, and through the pulse excitation voltage to generate a magnetic field, the pipeline under test generates an eddy current field.

Preferably, the end of the four-bar mechanism is connected with a rotating shaft, so that the four-bar mechanism, the clamping mechanism and the eddy current deformation sensor base can form a parallelogram mechanism.

Preferably, the base can be connected with the rigid frame of the inner detector, which can improve the overall stability of the detection probe.

Preferably, the type of the Hall chip is AS5145 chip, and the Hall chip is connected to one end of the four-bar mechanism through a magnetic rotation structure. The Hall chip has the characteristics of high precision, small size and non-contact detection. A radially magnetized cylindrical magnet is placed at a certain height just above the chip. When the magnet rotates around the axis, the Hall chip can detect the corresponding rotation angle and transmit the signal to the data storage system of the detector in the pipeline, so as to achieve the purpose of detecting the maximum deformation of the pipeline.

Compared with the prior art, the beneficial effects of the present utility model are: the utility model utilizes the pulse eddy current deformation sensor and the eddy current deformation sensor base, and is applied to the detection of the pipeline deformation amount based on the magnetic rotation coding detection technology and the eddy current ranging principle, Increase the effective information of pipeline circumferential detection and improve the detection accuracy. Through the four-bar mechanism, the pulse eddy current deformation sensor and the eddy current deformation sensor base can be kept level at all times. The pipeline deformation detector adds two symmetrically distributed magnetic detections on the probe protective shell. Based on the principle of pulsed eddy current detection, the circumferential precision of pipeline detection is increased, and the three-dimensional reconstruction of pipeline deformation contour is realized.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

FIG. 2 is a schematic view of the front structure of the utility model.

Figure 3 is a schematic view of the structure of the utility model viewed from the bottom.

FIG. 4 is a schematic structural diagram of the magnetic rotation structure of the present invention.

In the figure: 1- pulse eddy current deformation sensor, 2- eddy current detection unit shell, 3- clamping mechanism, 4- four-bar mechanism, 5- Hall chip, 6- base, 7- compound magnetic field detection unit, 8- connection Frame, 9-radial magnet, 10-magnetic rotation structure, 11-magnetic rotation coding detection unit protective shell.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Referring to FIGS. 1 to 4 , in an embodiment of the present invention, an integrated pipeline deformation internal detection composite probe includes a pulsed eddy current detection module and a magnetic rotation coding detection module. The upper part of the pulsed eddy current detection module is provided with a pulsed eddy current deformation Sensor 1, the pulse eddy current deformation sensor 1 can detect the strength of the composite magnetic field, and the lower part of the pulse eddy current deformation sensor 1 is connected with an eddy current sensor housing 2, and the eddy current sensor housing 2 provides a mechanical support structure for the excitation coil and the pulse eddy current deformation sensor. The upper part of the eddy current deformation sensor 1 is provided with a composite magnetic field detection unit 7. The composite magnetic field detection unit 7 can place excitation signals and magnetic detection elements. One end of the eddy current sensor shell 2 is fixedly connected with a connecting frame 8, which can improve the stability of the detection probe. , and the other end of the connecting frame 8 is connected with the clamping mechanism 3, the clamping mechanism 3 can be connected with the four-bar mechanism and the probe, the lower side of the clamping mechanism 3 is connected with the four-bar mechanism 4, and the four-bar mechanism 4 can hold the The protective shell of the detection probe is always level with the base, and the accuracy of the eddy current detection deformation is improved. The upper part of the magnetic rotary coding detection module is provided with a magnetic rotary coding detection unit protective shell 11, and the magnetic rotary coding detection unit protective shell 11 has a storage magnetic rotary The function of the coding chip, the magnetic rotary coding detection unit protective shell 11 is provided with a magnetic rotary structure 10, and one end of the magnetic rotary structure 10 is installed with a radial magnet 9, and the inner side of the magnetic rotary coding detection unit protective shell 11 is provided. There is a Hall chip 5, and the Hall chip 5 can detect the rotation angle of the radial magnet 9 to detect the maximum deformation amount of the pipeline. The lower part of the protective shell 11 of the magnetic rotation coding detection unit is connected with the base 6, and the base 6 can be The entire probe provides a mechanical support structure.

The pulsed eddy current deformation sensor 1 is composed of a TMR2503 magnetic flux tunnel chip, an amplifier circuit and a filter circuit, and the lower part of the pulsed eddy current deformation sensor 1 is provided with two excitation coils wound with enameled wires, and the pulsed eddy current deformation sensor 1 is used to detect the magnetic field. The size of the strength, and through the pulse excitation voltage to generate a magnetic field, the pipeline under test generates an eddy current field.

The end of the four-bar mechanism 4 is connected with a rotating shaft, so that the four-bar mechanism 4 , the clamping mechanism 3 and the eddy current deformation sensor base 6 can form a parallelogram mechanism.

The base 6 can be connected with the rigid frame of the inner detector, which can improve the overall stability of the detection probe.

The model of the Hall chip 5 is AS5145 chip, and the Hall chip 5 is connected with one end of the four-bar mechanism 4 through the magnetic rotation structure 10. The Hall chip 5 has the characteristics of high precision, small size and non-contact detection, A radially magnetized cylindrical magnet is placed at a certain height just above the Hall chip 5 . When the magnet rotates around the axis, the Hall chip 5 can detect the corresponding rotation angle and transmit the signal to the data storage system of the detector in the pipeline, so as to achieve the purpose of detecting the maximum deformation of the pipeline.

The deformation detection of the pipeline deformation detection probe of the utility model mainly includes a magnetic rotary encoder and an eddy current detection probe. The size of the magnetic sensitive element is very small, and the number of detection points can be increased in the circumferential direction of the pipeline, thereby improving the detection accuracy of deformation in the pipeline. At the same time, an excitation coil and a detection element are placed on the upper part of the probe protective shell 7 to induce the chip by inducing the change of the composite magnetic field intensity. The change of the output voltage is used to calibrate the deformation information of the pipeline. The pulsed eddy current deformation sensor 1 is used to generate a primary magnetic field through the pulse excitation voltage. The measured pipeline generates an eddy current field, and the eddy current field generates a secondary magnetic field. When the pipeline is deformed, the eddy current field changes and the composite magnetic field As the value changes, the Hall chip 5 detects the change of the composite magnetic field. When the pipeline is deformed, the distance between the excitation coil and the pipeline changes. The Hall chip 5 calibrates the deformation information of the pipeline by detecting the change of the composite magnetic field, so as to achieve the deformation of the pipeline. For the purpose of detection, the magnetic rotary coding detection chip in the housing 5 of the magnetic rotary coding mechanism records the angle change of the four-bar mechanism caused by the deformation of the pipeline, so that the output voltage of the detection chip changes, and the later data processing calibrates the shape of the pipeline through the change of the voltage value. The size of the variable can ensure the detection accuracy of the pipeline.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention may be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, with the scope of the invention being defined by the appended claims rather than the foregoing description. Any reference signs in the claims shall not be construed as limiting the involved claim.

Claims (5)

1. An integrated pipeline deformation inner detection composite probe, comprising a pulsed eddy current detection module and a magnetic rotation coding detection module, it is characterized in that: the upper part of the pulsed eddy current detection module is provided with a pulsed eddy current deformation sensor (1), and the pulsed eddy current The lower part of the deformation sensor (1) is connected with an eddy current detection unit casing (2), the upper part of the pulsed eddy current deformation sensor (1) is provided with a composite magnetic field detection unit (7), and the eddy current detection unit casing (2) is provided with a composite magnetic field detection unit (7). One end is fixedly connected with a connecting frame (8), and the other end of the connecting frame (8) is connected with a clamping mechanism (3), the lower side of the clamping mechanism (3) is connected with a four-bar mechanism (4), so The upper part of the magnetic rotary coding detection module is provided with a magnetic rotary coding detection unit protective shell (11), and the magnetic rotary coding detection unit protective shell (11) is provided with a magnetic rotary structure (10) inside, and the magnetic rotary structure (10) ) is installed with a radial magnet (9) at one end, a Hall chip (5) is arranged inside the protective shell (11) of the magnetic rotary coding detection unit, and the lower part of the protective shell (11) of the magnetic rotary coding detection unit is connected to the base (6) Connected. 2. An integrated pipeline deformation inner detection composite probe according to claim 1, characterized in that: the pulsed eddy current deformation sensor (1) is composed of a TMR2503 magnetic flux tunnel chip, an amplifier circuit and a filter circuit, and the pulse The lower part of the eddy current deformation sensor (1) is provided with two excitation coils wound with enameled wires. 3 . The integrated pipeline deformation internal detection composite probe according to claim 1 , wherein a rotating shaft is connected to the end of the four-bar mechanism ( 4 ). 4 . 4 . The integrated pipeline deformation internal detection composite probe according to claim 1 , wherein the base ( 6 ) can be connected with the rigid frame of the internal detector. 5 . 5. A kind of integrated pipeline deformation inner detection composite probe according to claim 1, is characterized in that: the model of described Hall chip (5) is AS5145 chip, and Hall chip (5) passes through magnetic rotation structure ( 10) Connect with one end of the four-bar mechanism (4).

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