SU1397712A1 - Method of measuring thickness - Google Patents

Abstract

The invention relates to a measuring technique and is aimed at ensuring the control of non-conductive easily deformable objects without damaging them, as well as preventing wear of the contact tip. When drying the method, an low-resistance electrically conductive coating is applied to the surface of the object with respect to material of the controlled object. The object is placed on the base surface of the electrocontact device and the contact tip is moved until the electrical contact between it and the surface of the monitored section is established, judged by the short circuit between the contact tip and the slip collector placed on the same surface of the object. By the magnitude of the movement of the contact tip, the thickness of the object is judged. By automatically fixing the moment of contact with the conductive coating, which simultaneously performs protective functions, the deformation of the object is eliminated and reduced. contact tip wear. 2 Il. § (L

Description

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The invention relates to a measurement technique and can be used to control the thickness of parts from easily deformable materials, such as naphler, rubber or brittle dielectric materials.

The aim of the invention is to control non-conductive easily deformable objects and to prevent their damage and wear of the contact tip of the electro-tact type measuring device used.

Fig. I shows a diagram of an electric contact thickness measuring device used in the implementation of this thickness measuring method; FIG. 2 shows a controlled object in the process of measurement, top view.

The device for measuring the thickness contains a movable contact tip 1, intended to interact with the object under monitoring 2.

Tact tip 1 is associated with unit 3 for measuring the amount of movement of the tip. For installation of a controlled object, a base table 4 of the used electrocontacting device is intended. To block 3 for measuring the amount of movement of the contact tip 1, an overhead collector electrode 5 is connected to be placed in series on the monitored sections 5.7 or 8 of object 2. During the measurements on sites 6–8 of object 2, electrically conductive coatings 9–11 are made of a low-resistance material with low electrical resistivity and high adhesion properties s with respect to a material object. For rubber objects, carbon black can be used as a coating. The coating can also be made, for example, by depositing a film of moisture on the surface of the object.

The measurement method is carried out in the following way.

The controlled object 2 is installed on the base surface A, in the area 6.7 or 8, the surface of the object is coated with 9.10 or 11 of electrically conductive low-resistance material with high adhesive properties in relation to the material of the object being monitored 2, Alternately

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on the corresponding controlled area with a deposited m; a coating of the slip current collector electrode 5 on it, after which the contact tip 1 is moved until its electrical contact with the electrically conductive coating 9,10 or 11 is established. The moment of contact is determined by the short circuit formed by the lug 1, the electrically conductive coating 9,10 or 11 and the overhead electrode 5 and the input of the measuring unit 3, With this block, we can determine the displacement of the contact tip 1 from the initial position the moment of contact, through which is judged on the thickness of the controlled object legkodeiyurmiruemogo. Due to the high adhesiveness of the coating, its low electrical resistance and thickness, its effect may be negligible and does not affect the measurement results. Since the moment when the tip touches the surface of an object with n, the coating of the coating onto it is automatically fixed, with high speed, the deformation of the object being monitored is prevented by the tip at the moment of contact and the error due to a delay in stopping the Tip, except for the tip reduces its wear and prevents the possibility of damage to the object of control due to its irreversible deformation. The stratum of contact between the tip and the surface of the object is passed through the electrically conductive coating, the controlled object to the mine. Thus, the electric current does not flow through the body of the easily deformable object, which eliminates its local strain and electrical erosion.

Claims (1)

Invention Formula A method for measuring the thickness of an object, which means that the object being monitored is mounted on the base surface of an electrocontact device, the contact tip is moved until electrical contact is established between it and the surface of the object and moves //////////////////////////. Fy / Yu X 77 Jjl jz: