SU1518741A1 - Radioelectronic pickup of length - Google Patents

Abstract

This invention relates to radio measurement. The purpose of the invention is to improve the measurement accuracy. The electronic length sensor contains a master r-1 microwave, whose frequency-setting circuit includes a microwave resonator 2, made in the form of a waveguide segment, one end of which is short-circuited, and the other has a short-circuiting coupling 3, as well as a low-frequency frequency 4 connected through a filter The 5 low frequencies and the dividing chain 6 to the anode of the diode g. 1. To measure the distance between two planes A and B between them, resonator 2 is placed. By adjusting the short circuit 3, increase the length of the waveguide section of the resonator 2 to p until it becomes equal to the distance between planes A and B. Next, using frequency meter 4, the frequency Ω is measured, depending on the length L of resonator 2, and taking into account the constant length ΔL, the measured length is calculated. 1 il.

Description

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This invention relates to a technique of radio measurements and can be used in mechanical engineering and robotics.

The purpose of the invention is to improve the measurement accuracy.

The drawing shows the design of the proposed radio wavelength sensor.

A radio wavelength sensor contains a master oscillator microwave 1, for example, on an avalanche-span diode or Gunn diode, a microwave resonator made in the form of a long line segment - waveguide 2 length 1, one end of which is short-circuited, and the other has a short-circuit 3 , allowing to change the length of the waveguide section, the diode of the master microwave generator 1 can be installed at the short-circuited end of the waveguide section 2, the low-frequency frequency meter 4 connected through the low-pass filter 5 and the separator chain 6 to node microwave oscillator diode, while the lower filter 5

frequency tuned to frequency

Ln

where CJ is the microwave generation frequency, N is the natural frequency number of the microwave resonator 2,

The use of a segment of a long line, which is a segment of a waveguide 2, leads to multi-frequency generation with eigenfrequencies located through equidistant (equidistant) frequency intervals fl determined by the delay value in a long line f.j (multi-frequency comb filter, while

So 9 depends

14

from the length of the microwave resonator 1, and its value iJ (l) can be separated from the anode of the microwave generator 1.

Electronic length sensor works as follows.

For example, it is necessary to measure the distance between two planes A and B (see drawing). The microwave resonator is placed between these planes and by adjusting the moving short-circuit 3 increases the length of the waveguide 2 until it becomes equal to the distance between the planes A and B. Next, using the low-frequency frequency meter, the value of il (l) is measured and of a constant length L1, the measured length is calculated.

Claims (1)

Invention Formula An electronic length sensor containing a master oscillator, whose frequency-dependent circuit includes a microwave resonator, and a low-frequency frequency meter, characterized in that, in order to improve measurement accuracy, the microwave resonator is designed as a waveguide section, one end of which is short-circuited and the other end a moving short-cutter is installed in contact with the object under study; a low-pass filter is introduced, tuned to the frequency  ---, where are the microwave generation frequency, N is the natural frequency number of the microwave resonator, while the low-pass filter is connected to the anode circuit of the microwave master oscillator and connected to the input of the low-frequency frequency meter.