SU1715958A1 - Device for controlling extent of soil thickening - Google Patents

Abstract

The invention relates to construction equipment, in particular, to means of controlling the degree of compaction of building soils, and makes it possible to increase accuracy and reliability. The device contains a sealing organ displacement transducer, made in the form of a high-frequency generator 1. an oscillatory circuit 2, the controlled reactive element of which is connected to a sealing body, an amplitude detector 3 and an amplifier 4, an oscillation analyzer made in the form of peak detectors 5 and 6, a divider 7 for example units, elements 8 and 9 of the comparison, generator 10 counting pulses, keys 11 and 12, counters 13 and 14, and register 15. 1 Il.

Description

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The invention relates to construction equipment, in particular to means of controlling the degree of compaction of building soils.

The purpose of the invention is to improve the accuracy and reliability of the control.

The drawing shows a block diagram of a device for controlling the degree of soil compaction.

The device contains a transducer movement of the sealing body (not shown). The converter is made in the form of a high-frequency generator 1, an oscillatory circuit 2 with a controlled reactive element, an amplitude detector 3 and an amplifier 4. In addition, the device contains an oscillation analyzer made in the form of the first 5 and second 6 peak detectors, the voltage divider 7, the first 8 and the second 9 comparison elements (comparators), the generator 10 counting pulses, the first 11 and second 12 controlled keys, the first 13 and second 14 pulse counters, register 15. From the analyzer output, the signal goes to the display unit 16 output signal. The output of the high-frequency generator 1 is connected to the input of the oscillating circuit 2, the controlled reactive element (not shown) of which is mechanically connected (for example, by pulling) to the sealing body.

The displacement transducer serves to convert the mechanical vibrations of the vibratory roll body into an analog electrical signal.

Next, the analog signal in the vibration analyzer is converted into a digital code and fed to the display unit 16.

The device works as follows.

With the start of operation of the vibratory roller, mechanical oscillations of the sealing body are fed to the capacitive transducer of the oscillatory circuit 2 fed by the high-frequency generator 1, and its frequency is shifted relative to the resonant frequency of the circuit 2 by about half of its passband. The oscillations of circuit 2, modulated by mechanical oscillations, are fed to an amplitude detector 3, which produces an electrical signal proportional to mechanical oscillations, having the form of a sinusoid with different curvature of negative (cavity) and positive (slide) half-waves. The degree of their difference clearly depends on the degree of compaction of the soil. Further, the electrical signal, after amplification by block 4 of its amplitude six times, is fed to the inputs

first 8 and second 9 elements of comparison and to the inputs of the first 5 and second 6 peak detectors, at the outputs of which constant potentials are formed, equal to the highest and lowest values of the input signal. Each potential, respectively, reduced and increased by a divider of 7 voltages, each for the same proportion equal to 0.13 (or 0.34) of the potential difference applied to it, goes to the second inputs of elements 8 and 9 of the comparison. The rectangular pulses formed by them, whose durations are equal, respectively, to the duration of the positive and negative half-wave of the signal outside the region bounded by the potentials formed by the voltage divider 7, include the first 11 and second 12 controlled keys. Wherein

through them from the generator 10 counting pulses, the 5-decade measuring counter 13 and the 4-decade controlling counter 14 counting pulses arrive. The last discharge pulse of the fourth decade of the control counter 14, which corresponds to the passage of the 10,000th pulse in it, includes a register 15, which captures the readings of the measuring counter 13 and transmits them to the output indicator 16. After that, the cycle repeats.

Improving accuracy and reliability is achieved by reducing the number of moving mechanical elements, the displacement transducer, and in addition, by converting the electrical signals generated at the outputs of the comparators into a digital code.

Claims (1)

Invention Formula Device for controlling the degree of compaction of soil, containing a transducer of the movement of the sealing body, the output of which is connected to the inlet an oscillation analyzer made in the form of a voltage divider, two comparison elements and two keys, the outputs of the voltage divider connected to the first inputs of the first and second comparison elements, the outputs of which are connected to one of the inputs of the first and second keys, the output of the vibration analyzer connected to the unit indications, characterized in that, in order to improve the accuracy and reliability of control, the displacement transducer is made in the form of a series-connected high-frequency generator, an oscillating circuit whose controlled reactive element is connected to a sealing unit, an amplitude detector and an amplifier whose output is the output of the displacement transducer, the vibration analyzer is equipped with a counting pulse generator, two peak detectors , two counters and a register, with the second inputs of the comparison elements and the inputs of the peak detectors being the input of the analyzer The oscillations of the outputs of the peak detectors are connected to the corresponding inputs of the divider, eg 0 The counter pulse generator is connected to other key inputs, the output of the first key is connected to one of the inputs of the first counter, the output of which is connected to one of the register inputs, the output of the second key is connected to the input of the second counter, the output of which is connected to another input of the first counter and another register input whose output is the output of the vibration analyzer.