SU1420351A1 - Device for non-destructive non-contact check of thickness of article film coating - Google Patents

Abstract

The invention relates to instrumentation engineering, in particular to automated devices for non-destructive testing and measuring the thickness of the film coating of an article. The purpose of the invention is to expand the functionality by measuring the thickness of the coatings and improving the accuracy - by introducing heat sources 11, and 13, the reference sample 3 and the second thermal receiver 14. Measurement of the thickness of the coating on the product 2 is carried out by aligning the readings of the thermal receivers 12 and 14 when the thermal receiver 14 is displaced along the generatrix of reference sample 3, having a linearly varying thickness of the film coating. 1 il. ABOUT)

Description

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The digital solution relates to the instrumentation technology, namely, to automated devices for non-disruptive control and measurement of film coating thickness of products,

The purpose of the invention is the expansion of functional capabilities by measuring the thickness of the coating and the use of accuracy.

The drawing shows a diagram of the device.

A device for non-destructive control of the thickness of the film coating 1 of article 2 contains a reference sample of weedles in an oide of a cylindrical drum 3 of the same material as product 2, on the surface of drum 3 a film coating 4 is applied with a thickness that increases linearly from minimum (zero) to maximum values in the range of investigated coating thicknesses. Above the surface of the product 2, parallel to it, and above the surface of the drum 3, parallel to its core, are fixed platforms 5 and 6,

Arrangement | The structure contains two drives 7 and 8 with electric motors 9 and 10, Drive 7 is kinematically connected with the axis of the drum. The first concentrated source of heat energy 11 and the first thermal receiver 12 are fixed on the drive belt 7 and are installed on the platform 5 through it. The second source of heat energy 13 and the second thermal receiver 14 are fixed on the tape of the drive 8 and installed on the platform 6 through it. Distance x between the paired sources and 1 receiver are the same. Platforms 5 and 6 have through holes in the line of movement of sources and thermal detectors, Thermal receptacles 12 and b (through amplifiers 15 and 16 are connected to the device 17 compared, the output of which is connected to the control unit 18 of the reversing / engine 10 drive 8. Unit 19 power supply provides power to the sources 11 and 13 of thermal energy, engines 9 and 10 of drives 7 and 8 and the engine 20 of the recording device 21,

VcTpoiicTBO works as follows.

The test article 2 is located under the platform 5 so that the optical axes of the concentrated source 11 of heat and the thermal receiver 12 are perpendicular to the surface of the device.

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LIA and focused on it. At the same time, the distance x between the heating spot and the Temperature Measuring Point on the surface of the product 2 must be equal to the distance between the heating spot from the source 13 and the temperature measuring point of the thermal receiver 14 on the surface of the control sample. In the control process, the actuator 7 moves the source 11 and the thermal receiver 12 relative to the product 2 at a constant velocity V and rotates the drum 3. In this case, the displacement speed of the thermal receiver 12 relative to the product surface is equal to the displacement speed of the surface of the drum 3 relative to the thermal receiver 14.

The temperature values from the thermal receivers 12 and 14 through the amplifiers 15 and 16 are fed to the comparison device 17, from the output of which the difference signal is fed to the control unit 18 of the reversing motor 10, the latter using the drive 8 moves the source 13 and the thermal receiver 14 along the reference drum 3 to as long as the temperatures on the surface of the product and the reference sample become equal. This equality of surface temperatures is possible only when the thickness of the film coating on the test article and the control sample is the same. The location of the thermal receiver 14 is displayed on a recording device, calibrated in accordance with the thickness of the film coating on the reference sample. Thus, this device allows you to quickly and with high accuracy to obtain the value of the thickness of the film coating on the entire surface of the investigated product.

Claims (1)

Formula invented and. A device for nondestructive contactless control of the film thickness of the product, containing two thermal receivers, the first platform to be placed above the product surface, the first drive for moving one thermal receiver, a recording device and a power supply unit, in order to extend the functionality by measurement of the thickness of the coating and increase accuracy, it is equipped with a reference sample, made in the form of a cylindrical drum, installed with the ability to rotate relative to its axis, kinematically associated with the first drive, a film coating is applied on the drum surface with a thickness varying linearly along the drum generator from the minimum to the maximum value in the range of Controlled coating thickness, with a second platform, parallel to the drum axis, with two concentrated sources of thermal energy placed at the same distance each 20351 from its thermal receiver, the first source and the first fepary receiver paired with it are mounted on the first platform and are arranged sequentially in the direction of their movement, the second source and the second thermal receiver paired with it to the second platform and are located in a plane, Q perpendicular to the axis of the drum, the second drive - with a control unit for moving the second source and the second thermal receiver parallel to the drum axis, the comparison unit, to the 15th input of which the thermal receivers are connected through amplifiers, and to the output - the control unit a second drive motor.