SU1401419A1 - Method of locating and detecting the nature of flaws in electric circuit - Google Patents

Abstract

The invention relates to electrical measuring technique and serves to shorten the measurement time and increase the reliability of determining the location and nature of the defect. The device implementing the method comprises a test broadband signal generator 1, an induction sensor 3, a recorder 4, an energy spectrum meter 5 and a decoder 6. The tested circuitry 2 is affected by a white noise test signal. Registered reactions of scheme 2 are compared with the reference. 2 Il.

Description

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11401419

The invention relates to electrical measuring equipment and can be used in the search for defects in radio engineering and electrical circuits.

The purpose of the invention is to reduce the measurement time and increase the reliability of determining the location and nature of the defect.

FIG. 1 shows a structural jg diagram of an apparatus for carrying out the method; n.a fig. 2 - induction sensor.

. The device consists of a generator 1 test broadband signal connected to the test (including the reference) circuitry 2, which emits an electromagnetic field perceived by the induction sensor 3 which is connected to the recorder 4 through the series-connected meter 5 of the electromagnetic radiation energy spectrum and decoder 6,

Recorder 4 is a system for recording the results of comparing energy spectra and gathering information about the nature and location of the defect. The decoder 6 serves to compare the shapes of the energy spectra of the electromagnetic radiation of the test and the reference. electrical circuits. The reference electrical circuit is an electrical circuit of this class, on which the most common defects are modeled. Induction sensor 3 is a frameless. Coil, the dimensions of which correspond to the dimensions of the tested electric circuit 2.

The method is carried out as follows.

Before examining the tested electrical circuit 2, the generator 1 of the test broadband signal is connected to the input of the reference electric circuit with the simulated most frequently encountered defects

into electrical signals. Using the induction sensor 3 and the energy spectrum meter 5 in the decoder 6, they record the energy spectra of the electromagnetic radiation of the reference circuit with the simulated most frequently encountered defects. Connected to the generator output t of the test broadband signal of the tested electric circuit 2.

Using the induction sensor 3 and the meter 5 of the energy spectrum in the decoder 6 serves the shape of the energy spectrum of the electromagnetic radiation of the test electric circuit 2 during the flow of the test broadband signal. In de 2Q encoder 6, the obtained form of the energy spectrum of electromagnetic radiation is compared with the reference ones.

The results of the comparison of the forms of the energy spectra of electromagnetic radiation, when a test signal flows in the electric circuit 2, enter the recorder 4, which records the results of the comparison and gives information about the location and nature of the defect. In order to reduce the effect of external electromagnetic interference, the electrical circuit 2 and the inductive sensor 3 are tested by an electromagnetic shield.

The application of the proposed method will allow reducing the measurement time and increasing the reliability of determining the defects of the electrical circuit.

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Claims (1)

Invention Formula The method of determining the location and nature of defects in an electrical circuit, is that the circuit under test is influenced by a test signal, the circuit responses are recorded and the registered signals are compared with the reference ones, characterized in that, in order to shorten the time wideband test signal, pre-50 measurement and reliability five g into electrical signals. Using the induction sensor 3 and the energy spectrum meter 5 in the decoder 6, they record the energy spectra of the electromagnetic radiation of the reference circuit with the simulated most frequently encountered defects. Connected to the generator output t of the test broadband signal of the tested electric circuit 2. Using the induction sensor 3 and the meter 5 of the energy spectrum in the decoder 6 serves the shape of the energy spectrum of the electromagnetic radiation of the test electric circuit 2 during the flow of the test broadband signal. In de Q encoder 6, the obtained form of the energy spectrum of electromagnetic radiation is compared with the reference ones. The results of the comparison of the forms of the energy spectra of electromagnetic radiation, with the flow of the test signal in the electric circuit 2, enter the recorder 4, which records the results of the comparison and gives information about the location and nature of the defect. In order to reduce the effect of external electromagnetic interference, the test circuitry 2 and the induction sensor 3 are protected by an electromagnetic shield. The application of the proposed method will allow reducing the measurement time and increasing the reliability of determining the defects of the electrical circuit. five 0 five 40 Invention Formula The method of determining the location and nature of defects in an electrical circuit, consisting in that the circuit under test is influenced by a test signal, the circuit responses are recorded and the registered signals are compared with the reference ones, characterized in that, in order to shorten the time measure and improve reliability Yupryy SZGMMU put harmonic oscillations of all frequencies that have the same amplitude dispersion. Electromagnetic radiation emitted by electrical circuit 2 is converted in induction sensor 3 determining the location and nature of the defect, affecting the circuit with a test signal such as white noise and recording the energy spectrum of the electromagnetic radiation of the circuit under test.