RU1812524C - Method and device for measuring resistance of contacting conductors of high frequency circuit - Google Patents

Abstract

Usage: in radio engineering, in particular in radio measuring equipment, and can be used in measuring the resistance of the contacting conductors to high-frequency current. SUMMARY OF THE INVENTION: In a method including the operation of supplying electric current, measuring electric current, a high-frequency current of a certain magnitude is passed, a stationary thermal regime is established, keeping the necessary time, the magnitude of the effective value of the high-frequency current is measured, the temperature of the contacting conductors is measured by the non-contact method and calculated the resistance of the contacting conductors to a high-frequency current from the heat balance equation of the circuit according to the formula R -, - П where k - is known sensible heat of the material contacting the conductors; m - the mass of contacting conductors is known. The goal is also achieved by the fact that the device for determining the resistance of the contacting conductors comprises a non-contact temperature sensor, a stopwatch, a parallel resonant circuit, on which a high-frequency signal source is loaded, contacting conductors located at a point with a zero potential of the parallel resonant circuit, a meter of the effective value of the high-frequency current included in the high-frequency current circuit. 2 s.p. f-ls, 2 ill.

Description

The invention relates to the field of radio engineering, in particular to radio measurement technology, and can be used in measuring the resistance of contacting conductors to high-frequency current.

The aim of the invention is to increase the reliability of determining the resistance of contacting conductors in conditions of intense electromagnetic fields.

In FIG. 1 shows a section of a circuit of contacting conductors

the proposed method for determining the resistance to high frequency current; in FIG. 2 is a structural diagram of a device that implements the proposed method.

The device consists of a source of high-frequency signals 1 (for example, the end stage of the transmitter), a parallel resonant circuit 2, in which contacting conductors 3 are located at a point with zero potential, a meter for the effective value of the high-frequency current (for example, a thermoammeter), non-contact N3

Јь

temperature sensor 5 (for example, a directional infrared detector), stopwatch 6.

The device operates as follows.

The source of high-frequency signals 1 is loaded onto a parallel resonant circuit 2 tunable to appropriate frequencies, in which the contacting conductors 3 are connected to a point with zero potential. When setting the parallel resonant circuit 2 into resonance using a high-frequency current meter 4, the current value of current I is measured, and stationary thermal mode, keeping a certain time with a non-contact temperature sensor 5, the heating temperature T is measured, and with a stopwatch 6, the time t is set Yeni stationary thermal regime.

From the equation of the balance of power of heat release and heat loss (2Rt kmT, the resistance of the contacting conductors to the high-frequency current is calculated by the formula

R

k-m-T I2t

where k is the known heat capacity of the material of the conductors ;.

m - the mass of contacting conductors is known.

The proposed method and apparatus for determining the resistance of contacting conductors in a high-frequency circuit, in contrast to the known ones, can significantly increase the reliability of determining the resistance under conditions of an intense electromagnetic field. Such a positive effect of the proposed method and device that implements this method allows to obtain information about the resistance of the contacting conductors in the high frequency circuit and to judge the reliability of the contact connections in the high frequency circuit.

Claims (2)

Formula and Zobere. n and 1. A method for determining the resistance of contacting conductors in a high-frequency circuit, which consists in supplying electric current, measuring electric current, characterized in that, in order to increase the reliability of determining the resistance to high-frequency current, a high-frequency current is passed through the circuit of a certain value, the stationary thermal regime is established, keeping the necessary time, the value of the effective value of the high-frequency current I is measured, the temperature of the contacting conductors T is measured by the non-contact method, and the resistance of the contacting conductors R to the high-frequency current is calculated from the thermal balance equation using the formula k-m-T. R I2t where k is the specific heat material of contacting conductors; t is the time of establishment of the stationary thermal regime; m is the known mass of contacting conductors .; 2. A device for determining the resistance of contacting conductors in a high frequency circuit comprising a contact. the conductors forming an electric current circuit with a current source, an electric current meter, and it is tout by the fact that in order to increase the reliability of the distribution of resistance to high-frequency current, a stopwatch, a non-contact temperature sensor and a parallel resonant circuit connected with the output of a current source, which is used as a source of high-frequency signals, and the contacting conductors are located at a point with zero potential of a parallel resonant circuit, and as a meter of electric current, a meter of the effective value of the high-frequency current, included in the high-frequency current circuit, is used. . ft / af