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CN-122017006-A - Contact material electroablation morphology in-situ extraction system and method

CN122017006ACN 122017006 ACN122017006 ACN 122017006ACN-122017006-A

Abstract

An in-situ extraction system and method for electric ablation morphology of contact materials belong to the fields of electric performance test and electric contact failure analysis of contact materials. The invention comprises a bottom plate, a Z-axis electric sliding table, a movable contact clamp, a movable contact, a spring, an X-axis electric sliding table, a Y-axis manual sliding table, a fixed contact clamp, a fixed contact, a reference ruler, an industrial camera for shooting the movable contact, a three-dimensional shape measuring instrument for shooting the movable contact, an industrial camera for shooting the fixed contact, a three-dimensional shape measuring instrument for shooting the fixed contact, a displacement sensor, a power supply, a load, a control switch, an industrial control computer and a singlechip. The invention aims to provide an in-situ extraction system of the electric ablation morphology of a contact material and an in-situ contact state evaluation method, so as to realize in-situ extraction of surface morphology features of the contact material in the electric life test process and evaluate the contact state corresponding to the pairing position in the test process according to the electric ablation morphology of the contact material.

Inventors

  • REN WANBIN
  • LU SIYU
  • ZHANG CHAO
  • HE YUBIN

Assignees

  • 哈尔滨工业大学

Dates

Publication Date
20260512
Application Date
20260210

Claims (8)

  1. 1. The contact material electroablation morphology in-situ extraction system is characterized by comprising a bottom plate (1), a Z-axis electric sliding table (2), a movable contact clamp (3), a movable contact (4), a spring (5), an X-axis electric sliding table (6), a Y-axis manual sliding table (7), a fixed contact clamp (8), a fixed contact (9), a reference ruler (10), an industrial camera (11) for shooting a perturbation contact, a three-dimensional morphology measuring instrument (12) for shooting the perturbation contact, an industrial camera (13) for shooting the fixed contact, a three-dimensional morphology measuring instrument (14) for shooting the fixed contact, a displacement sensor (15), a power supply (16), a load (17), a control switch (18), an industrial control computer (19) and a singlechip (20); An X-axis electric sliding table (6) is arranged on the bottom plate (1), a Y-axis manual sliding table (7), an industrial camera (11) for shooting a perturbation contact and a three-dimensional morphology measuring instrument (12) for shooting the perturbation contact are arranged on the X-axis electric sliding table (6), and a static contact (9) is arranged on the Y-axis manual sliding table (7) through a static contact clamp (8); an industrial camera (13) for shooting the stationary contact, a three-dimensional shape measuring instrument (14) for shooting the stationary contact and a displacement sensor (15) are also arranged on the bottom plate (1); the Z-axis electric sliding table (2) is fixedly arranged on the bottom plate (1), the Z-axis electric sliding table (2) is provided with a movable contact (4) through a movable contact clamp (3), and the spring (5) is arranged in the movable contact clamp (3) and used for providing flexible contact for contact closure; the reference ruler (10) is fixed on the bottom plate (1) and is positioned between the movable contact (4) and the fixed contact (9), and the length direction of the reference ruler is consistent with the movement direction of the X-axis electric sliding table (6); The industrial control computer (19) is respectively and electrically connected with the industrial camera (11) for shooting the perturbation contact, the industrial camera (13) for shooting the static contact, the three-dimensional morphology measuring instrument (12) for shooting the perturbation contact and the three-dimensional morphology measuring instrument (14) for shooting the static contact, and is used for controlling the acquisition and the processing of the image and the point cloud data; The single chip microcomputer (20) is electrically connected with the industrial control computer (19), the Z-axis electric sliding table (2), the X-axis electric sliding table (6), the displacement sensor (15) and the control switch (18) respectively; The power supply (16), the load (17) and the control switch (18) are connected in series to form a load circuit, and two ends of the load circuit are respectively and electrically connected with the movable contact clamp (3) and the static contact clamp (8).
  2. 2. An in-situ extraction system of electroablative features of a contact material according to claim 1, characterized in that the direction parallel to the plane of the front face of a reference ruler (10) is defined as XY plane, the direction perpendicular to the plane and pointing away from the base plate (1) is +z direction, said reference ruler (10) is made of transparent material, and the front face with graduation marks printed thereon is parallel to said XY plane and oriented in +z direction.
  3. 3. The in-situ extraction system of the electroablation morphology of the contact material according to claim 2, wherein the industrial camera (11) for shooting the moving contact and the three-dimensional morphology measuring instrument (12) for shooting the moving contact are both fixed on the X-axis electric sliding table (6), and the shooting directions of the industrial camera (11) and the three-dimensional morphology measuring instrument are perpendicular to an XY plane and face to the-Z direction.
  4. 4. The in-situ extraction system of contact material electroablation morphology according to claim 3, wherein the industrial camera (13) for shooting the stationary contact and the three-dimensional morphology measuring instrument (14) for shooting the stationary contact are both fixed on the base plate (1), and the shooting directions of the industrial camera and the three-dimensional morphology measuring instrument are perpendicular to the XY plane and face to the +Z direction.
  5. 5. An in situ extraction system of electroablative features of contact materials as defined in claim 4, wherein: the three-dimensional morphology measuring instrument (12) for shooting the perturbation contact and the three-dimensional morphology measuring instrument (14) for shooting the static contact are both snapshot type three-dimensional morphology measuring instruments.
  6. 6. The system for in-situ extraction of contact material electroablation morphology according to claim 5, wherein the movement direction of the X-axis electric sliding table (6) is parallel to the extending direction of scale marks on the front surface of the reference ruler (10), and the X-axis electric sliding table (6) drives the Y-axis manual sliding table (7), the industrial camera (11) for shooting the perturbation contact and the three-dimensional morphology measuring instrument (12) for shooting the perturbation contact to synchronously move when in movement.
  7. 7. An in situ extraction system of electroablative features of contact material according to claim 5, wherein said movable contact holder (3) and stationary contact holder (8) are electrically conductive, and wherein an electrical connection is made when the movable contact (4) and stationary contact (9) are closed.
  8. 8. An in-situ extraction method of the electric ablation morphology of a contact material, which is realized by the in-situ extraction system of the electric ablation morphology of the contact material according to any one of claims 2 to 7, and is characterized by comprising the following steps: and S1, calibrating an industrial camera (11) for shooting a perturbation contact, an industrial camera (13) for shooting a static contact, a three-dimensional morphology measuring instrument (12) for shooting the perturbation contact, a three-dimensional morphology measuring instrument (14) for shooting the static contact, an X-axis electric sliding table (6) and a Z-axis electric sliding table (2), and establishing a global coordinate system. And S2, extracting visual image data and three-dimensional point cloud data of the electric ablation characteristics of the movable contact (4) and the fixed contact (9) in situ. And S3, restoring the real space position relation of the movable contact (4) and the fixed contact (9), and extracting the electric ablation characteristic parameters of the movable contact (4) and the fixed contact (9). And S4, establishing virtual contact between the movable contact (4) and the static contact (9), and extracting characteristic parameters of a contact interface.

Description

Contact material electroablation morphology in-situ extraction system and method Technical Field The invention relates to an in-situ extraction system and method for an electric ablation morphology of a contact material, and belongs to the fields of electric performance test and electric contact failure analysis of contact materials. Background The contact material is a carrier for completing the current conducting and breaking functions in the electric switch, and the electrical property of the contact material particularly refers to parameters capable of reflecting breaking arc performance (including arcing time, arcing energy and the like) and electrical contact performance (including contact resistance, contact temperature rise and the like). The arc discharge generated in the contact opening and closing action process can generate ablation phenomenon on the surface of the contact, and the contact is particularly expressed as contact quality loss, material alloying, morphology change and the like in an electric life experiment. This will cause a gradual degradation of the electrical contact performance after each contact closure until failure. In addition, the surface topography of the contact material and the state of the contact interface will also affect the contact breaking arcing behavior. It can be seen that the arcing, the electric ablation and the electric contact behavior which cyclically occur in the electric life test process have a mutual influence relationship. Therefore, the in-situ extraction of the surface morphology features of the contact material in the electric life test process is researched, and the contact state corresponding to the pairing position in the test process is evaluated according to the electric ablation morphology of the contact material, so that the method has important value for testing and evaluating the electric performance of the contact material. The contact state evaluation of the contact material in the electric life test process needs to meet the following conditions that 1, the contact state of the contact material can be evaluated in real time in the electric life test with the contact action times reaching tens of thousands times without taking out the contact from an experimental device, 2, the contact state of the contact material in the electric life test and the contact state of the contact material in closing can be accurately reduced, and 3, key information of a contact interface of the contact material in a microscopic scale can be obtained, wherein the key information comprises the number of the contact points, the positions of the contact points and the generated contact area. The method for evaluating the contact state of the contact material mainly comprises the following steps of firstly, using industrial CT to scan the contact in the closed state, directly obtaining the shape of a contact interface of the contact material, extracting the electroablation characteristic of the contact material, secondly, giving a contact force to test the contact resistance, reflecting the contact area and the contact state of the contact material by comparing the contact resistance, thirdly, using an existing Chinese patent with the publication number CN104061881B to invent an optical device for observing and analyzing the contact area of the contact and calculating the actual contact area, using a transparent flat plate material to replace one contact to shoot an image of the contact material while simulating the contact, fourthly, using the traditional Chinese patent with the publication number CN111347187B to invent an experimental device capable of acquiring fusion welding parameters of the contact material in real time in a contact electric life experiment, and using an industrial camera to shoot the image of a static contact in situ. In the evaluation method, firstly, a contact material sample is required to be taken out of a working environment, the evaluation of the contact state of the contact material in an electric life experiment with more contact action times cannot be met, secondly, the number, the position and the contact area of the contact point cannot be obtained, so that the reasonable evaluation cannot be realized under the condition that the contact resistance of the contact material is the same or close to that of the contact point, thirdly, a transparent flat plate is used for replacing one contact point, fourthly, only a static contact point can be shot in situ, and both methods cannot restore the real condition of the contact interface of a movable contact point and the static contact point, so that the contact state of the contact point material in the electric life experiment cannot be evaluated. The prior art is not capable of extracting the morphological characteristics of the contact material and performing in-situ evaluation of the contact state in an electric life experiment. Therefore, it is needed to provide an in-situ extracti