SU1462169A1 - Microwave device for measuring properties of materials - Google Patents

Abstract

This invention relates to measurement techniques on a SACh. The purpose of the invention is to increase the sensitivity and accuracy of measurements. The microwave device contains r-p 1 linearly varying voltage, microwave r-p 2, power divider 3, resonator 4 with reference material, resonator 5 with the material under study, SBCh detectors 6 and; 7, detection units 8 and 9 of the width of the resonance curve, r-10 clock pulses, elec-tors 11 and 12, compensation block 13, reversing digital counter 14, and recorder 15. Voltage 1 regulates the frequency of r-2 by g. 1. The received signal through the divider 3 goes to the resonators 4 and 5 and further through the detectors 6 and 7 - to the detection units 8 and 9. They form pulses, proportional to nye duration widths of the resonance curves of the level 0.7 of voltage. Further, these pulses through the electrodes And 11 and 12 arrive at the counter 14, which under the action of the compensation unit 13 determines the correct desired value. The result of the calculation is induced by the registrar 15. The goal is achieved by the introduction of the definition blocks 8 and 9, Mr. 10, Element I 11 and 12, the compensation block 13 and the counter 14. 1 Il. se (L

Description

The invention relates to a microwave measurement technique.

The aim of the invention is to increase the sensitivity and accuracy of the measurements.

The drawing shows the electrical structural diagram of a microwave device for measuring the properties of materials.

The microwave device for measuring the properties of materials contains a ramp generator 1, a microwave generator 2, a power divider 3, a resonator 4 with a reference material, a resonator 5 with the test material, a first microwave detector 6, a second microwave detector 7, a first block 8 determine the width of the resonance curve, the second block 9 determine the width of the resonance curve, the generator 10 clock pulses, the first element And 11, the second block 13 compensation, digital counter 14, peak detector 16, 17, comparator

The microwave device for measuring the properties of materials works as follows.

Generator 1 generates pulses of a linearly varying voltage with a repetition period T. time-out Go, t] ‘one

In the element And 12, a reversing recorder 15, a voltage divider

18.

During the measurement of the properties of materials, voltage is applied to the hour of the microwave generator 2. The process of changing the frequency of the .LFM signal comes to a moment when its frequency reaches a value. At this moment, resonance occurs in the resonator with the material under study 5, and a resonant response appears at the output of the microwave detector.

In the process of further increasing the frequency of the microwave generator 2, the next moment comes when the frequency of the microwave generator 2 reaches fp ₄ . At this moment, resonance occurs in the resonator with the reference material 4, and a resonant response appears at the output of the microwave detector '6.

Next, the signals are fed to blocks and 9, which form pulses proportional in duration to the widths of the resonance curves at a level of 0.7 in terms of voltage.

To this end, the resonant response from the output of the microwave detector is fed simultaneously to the second input of the comparator and to the input of the peak detector 16. The maximum value of the 'resonant response is stored and stored at the output of the latter. A voltage divider 17 with a division ratio of 0.7 is connected to the output of the peak detector 16. At the output of the voltage divider 17, a constant voltage is formed, the value of which is 0.7 from the maximum value of the resonant response. As a result, rectangular pulses are formed at the output of the comparator 18, the duration of which is equal to the width of the resonant response, at a voltage level of 0.7.

The clock pulses from the torus 10 work in a similar way through a swarm of elements 11 and 12 of residence on other inputs of the elements AND of rectangular pulses proportional to the width of the resonance curves at the first and second inputs of the reversible digital counter 14. The third (multi-bit) input of the reversible digital counter 14 receives a multi-bit the code from the compensation unit 13, which determines the correctness of the calculation by the digital counter 14 of the desired value. The result of the calculation is induced by the recorder 15.

block 9. exit the first and second - during su35

Claims (1)

Formula of the invention A microwave device for measuring the properties of materials, containing a serially connected linearly varying voltage generator, a 4Q microwave generator, a power divider, a resonator with a reference material and a first microwave detector, a series-connected resonator with a test material, the input of which is connected to the second output of the divider power, and a second microwave detector, as well as a registrar, cast in that, in order to increase the sensitivity and accuracy of measurements, the first and second blocks for determining the width are introduced resonance curve, clock, first and second AND elements, a compensation unit and a reversible digital counter, the inputs of the first and second blocks for determining the width of the resonance curve are connected to the outputs of the first and second microwave detectors Topoj3, and the outputs to the first inputs of the first and second, respectively And elements, the second inputs of which are connected to the clock generator, and the outputs, respectively, to the first and second inputs of a reversible digital counter, the output of which is connected to the recorder, the output of the block compensation is connected to the third input of the reversible digital counter, and the first and second units for determining the width of the resonance curve, contain in series a peak detector, a voltage divider and a comparator, the second input of which is connected to the input of the peak detector and is the input of the unit for determining the width of the resonance curve, and the output of the comparator is the 1Q output of the unit for determining the width of the resonance curve.