SU1120247A1 - Direct voltage-to-pulse signal converter - Google Patents

Abstract

CONVERTER ELECTRICAL VOLTAGE CONVERTER INTO PULSE SIGNAL, containing conductive plates placed inside the hermetic cell. tic body parallel to the electric: women located at the ends of the body and forming closed cells filled with a liquid non-polar dielectric, each of which has a spherical electrically conductive particulate, the density of which is equal to the density of the liquid dielectric, the first resistive resistance connected to one of the electrodes , and a recording device, which is the one that, in order to increase the sensitivity and extend the measurement range, a source of reference voltage is introduced into it, through Second and second resistive resistances connected to. electrodes and inputs of a frequency comparison unit, the output of which is connected to a recording device, and the current-conducting plates are provided with current leads connected through a switch to the input of the converter.

Description

1 The invention relates to electrical measurements and can be used in chemical, textile and other industries to convert a constant voltage into a frequency signal. Converters of a constant voltage into a pulse signal are known, the principle of action of which is based on the circulation of conducting particles in the gaseous zone between two electrodes ij. Such devices have a relatively high sensitivity threshold, determined by the weight of the particle, and a malsh range of measurements. The closest technical solution to the invention is a converter of a constant electric voltage into a pulse signal containing conductive plates placed inside the hermetic case parallel to the electrodes located on the ends of the case and forming closed cells filled} 1st liquid a non-polar dielectric, in each of which a spherical electrically conducting macro particle is placed, whose density is equal to the density of a liquid dielectric, the first resistive resistance connected to one from the electrodes and the recording device 2j. The disadvantages of the known converter are low voltage sensitivity and a limited range of measurements, due to the fact that closed cells form a series of capacitance connections, in which the transformed voltage is distributed on individual cells. The purpose of the invention is to increase the sensitivity and expansion of the measurement range. The goal is achieved by converting a DC voltage to a pulse signal containing conductive plates placed inside a sealed enclosure parallel to the electrodes located along the ends of the housing and forming closed cells filled with a liquid non-polar dielectric, each of which has a spherical electrically conducting particulate whose density is equal to the density of a dielectric liquid, the first resistive resistance connected to one of the electrodes, and p gistriruyuschee device includes a source of reference voltage through first and second resistance rezistivnys Lonn connected to the electrodes and the inputs of comparing the frequency block whose output is connected to the recording device, and the conductive plates are provided tokopodvodamn, coupled through a switch to the input transducer. Figure 1a shows a functional circuit for converting a DC voltage to a pulse signal. The device comprises a housing 1, a housing cover 2, electrodes 3 and 4 mounted into the housing 1, a liquid dielectric 5 (for example, hexane) filling the interelectrode region, conductive plates 6 separating the interelectrode region into cells of series-connected capacitors, spherical Electron cable 1 of the particulate 7, each of which is placed in the appropriate cell, current leads 8-10, connected through a switch 11 to a source of converted voltage and connected through resistors 12 s a reference voltage source 13, as well as a frequency comparison unit 14 and a recording device 15. I The device operates as follows. When voltage is applied from source 1 3 to electrodes 3 and 4 through conductors 8 and 9, an electric field arises in a mezhzhelectrod gaps filled with dielectric 5. Under the action of an electric field, the electric wire of the particulate 7 oscillates. The oscillatory mode of motion of the particles is accompanied by the transfer of electrical charge, as a result of which electrical impulses are generated on resistive resistances 12. Before starting the measurement, by adjusting the source 13 of the reference voltage, such a voltage is selected on the electrodes 3 and 4 so that the pulse frequencies taken from the resistive resistances 12 are equal to each other. In this case, on in, 1 go

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block 14, the comparison frequency is zero.

When a measured voltage is applied through a switch 1I to one of the plates 6 through the current leads 10, the field strength is redistributed in the electrode gaps and, accordingly, one of the frequencies of the resistors 12 increases by f and the other decreases by the value of x. Comparison unit 14 generates a frequency difference at the output equal to 2 d .0 field p1202474

the measured voltage can be judged by the polarity of the pulses applied to the comparison unit 14.

. The proposed DC / DC converter to a pulsed signal has a high sensitivity and wide measuring limits, which can be adjusted using a reference source and a change in the number of parts in the interelectrode gaps.

Claims (1)

DC CONVERTER OF PULSE VOLTAGE IN PULSE SIGNAL, containing conductive plates placed inside the hermetic _:: sealed enclosure parallel to the electric: ladies located at the ends of the housing, and forming closed cells filled with a liquid non-polar dielectric, each of which contains a spherical electrically conductive particulate, the density of which is equal to the density of the liquid dielectric, the first resistive resistor connected to one of the electrodes, and a recording device, characterized in that, in order to increase the sensitivity and expand the limits of measurement, a reference voltage source is introduced into it, through the first and second resistive resistors it is connected come to. electrodes and inputs of the frequency comparison unit, the output of which is connected to a recording device, and the conductive plates are equipped with current leads connected through a switch to the input of the converter.