SU1462178A1 - Matrix of eddy-current converter - Google Patents

Abstract

The invention relates to non-destructive testing and can be used to determine the physicomechanical parameters of electrically conducting objects. The aim of the invention is to increase the reliability of control by increasing the number of monitored parameters and increasing the sensitivity to monitored geometrical parameters of objects. When the array is positioned over the object being monitored, the lines 1 of the excitation elements are sequentially scanned and the lines of 2.5 measuring elements are correspondingly scanned. The information coming from the adjacent pairs of rulers 2.5 measuring elements is compared to the mark itself. In the absence of defects, these signals will be equal to each other due to the symmetry of the circuit. According to the existing imbalance, the type of defect or the shape of the edge of the surface of the test product, 2 Cp, is determined by processing the data on the computational bus. f-ly, 2 ill. with (L

Description

FIG. 2

 The invention relates to non-destructive control and can be used to determine the physical and mechanical parameters of electrically conducting objects.

The aim of the invention is to increase the reliability of the control, by increasing the number of controlled pairs - Petrov and increasing the sensitivity k of controlled geometric parameters of eTpaM objects.

1 In FIG. Figure 1 shows the construction of a Matrix eddy current transducer with conditionally spaced vertices (crowded planes of measuring and exciting elements; Fig. 2 - (block device of the device that implements (matrix operation.

; The matrix eddy current transducer contains lines of 1 exciting elements arranged in parallel in the plane of control and forming rows of the matrix, lines of 2. N measuring elements, also located 1 parallel in the plane of control and forming the columns of the matrix. Structurally, the ruler 1 and 2 exciters and measuring elements contain, respectively, the pins 3.1. 1-3.N, N. and A.1.1.-4.NuN, where the first value of N determines the line number and the second the coil number in the line. The coils 3, i, k of the excitation rulers are wound counter to both the coils; 3.i.k + 1 and coils .k, and the coils Aik of the measuring lines are wound counter to the coils 4. i.k + and coils 4..k.

In addition, the transducer contains lines.5 measuring coils, executed in the form of long sides of the coils, the plane of which is orthogonal to the plane of the matrix of the eddy current transducer.

The device (Fig. 2), ensuring the operability of the matrix of the eddy current transducer, contains a series-connected generator 6 and switch 7 connected to the excitation element lines 1, an attenuator 8 connected between the output of the generator 6 and lines 2, 5 measuring elements, and connected in series unit control, the second, the output of which is connected to the mutator 7, the switch 10, to the switching inputs of which are connected the lines 2, 5 measuring elements, amp

0 5

About 5

five

The detector 1, analogue-1 converter 12, the second input, the second input of which is connected to the control unit 9, the interface 13 and the electronic computer 14, is lit.

The matrix works as follows. When inspecting the product edge (not shown), one of the pairs of adjacent lines 1 of exciting elements is connected to the generator 6 through the switch 7, and to the amplitude detector 11 through the switch 10 either a pair of adjacent lines 2 of the measuring elements or the corresponding line 5 of the measuring elements. In the absence of a control object, as well as in the presence of a defect-free surface, the state will be symmetrical, and the induced signals will be mutually compensated. As a result of the presence of the edge of the product, these signals will differ. Through an attenuator 8, a high-frequency component is added to these signals, allowing the amplitude detector 9 to be used to extract the information signal.

The control unit 9 organizes the operation of the switches 7 and 10 in such a way that line-by-line scanning of the object being monitored is performed. The information obtained after the amplitude detector 1) is converted into a digital code by an analog-digital converter 12 and through the interface 13 enters the electronic computer 14 for processing and visualization.

Claims (3)

1. The matrix of eddy current transducer, containing sensitive elements formed by the intersection of rows of parallel lines of exciting elements and columns of parallel lines of measuring elements, characterized in that, in order to increase the reliability of control, the columns of the matrix are made of two lines of measuring elements, lines of exciting elements made in the form of a chain of coils arranged linearly and wound oppositely, measure the second rulers, the full elements consist of linear conductors, pass Res cheg boiling point of contact of adjacent sides of coils in the lines excitation dayu1tsih elements. 31462178 2. The matrix under item 1, about tl and h and - 3. Matrix rio nn. 1 and 2, because of the fact that the second loudspeakers in the adjacent lines of the excitation measuring elements are made in the form of the long sides of the coils, the plane of which is orthogonal to the working plane of the matrix of vortexes elements are wound counter, and similar coils at the first lines of the measuring elements are wound according to. transducer, transducer,