SU1337695A1 - Device for measuring impulse pressure - Google Patents

Abstract

This invention relates to a measurement technique. To improve the measurement accuracy, an additional flat electrode 5 placed between the dielectric plates 3 and 4 and connected to a constant voltage source is used. Before the pressure is applied to the sensor, a voltage is applied to the electrode 5 and then disconnected from the source. Simultaneously with the action of the pressure pulse, the time dependence of the potential difference at the main measuring electrodes I and 2, used to calculate the pressure, is removed. I il. (L from 00 and with the joint venture pesuc / rrpoifau

Description

one

The invention relates to a measurement technique, in particular to the measurement of a rapid pressure, in particular a measurement of a pulse pressure.

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

The drawing shows the design of the device that implements the proposed method.

The device consists of two measuring electrodes 1 and 2, between which is placed a dielectric material in the form of two plates 3 and 4 of the same TOLPTsNY separated by a flat electrode 5, which is connected via a switch to a voltage source (not shown).

The pressure is measured as follows.

A voltage is applied to the flat electrode 5 from a high voltage source, then the flat electrode is disconnected from the constant voltage source and a pressure pulse is applied to the sensor. At the same time remove the time dependence of the potential difference on the measuring electrodes 1 and 2,

The pressure is determined from the expression

R . -Uy

Av

where V is the value of the constant voltage applied to the flat electrode. AT; plate thickness, m; potential difference arising on the measuring electrodes when subjected to a pressure pulse. AT;

d

and

Editor M, Petrova

Compiled by And, Nevsky

Tehred M. Morgental Proofreader M, Sharoshi

Order 4119/37 Circulation 776 Subscription

VNSh1TI State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d, 4/5

11y: 1vodstvenno-polygraphic enterprise, Uzhgorod, ul, Proektna, 4

376952

A is constant for the material of the dielectric plate, m Pa P is the desired pressure. Pa. The device can significantly reduce the error in measuring pressure.

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Form

A method for measuring a pulse pressure using a pressure sensor having a dielectric plate with two main electrodes, characterized in that, in order to increase the measurement accuracy, an additional flat electrode is placed in the dielectric plate parallel to the main electrodes, a voltage is applied to the additional electrode then the additional electrode is disconnected from the constant voltage source, the sensor is influenced by a pulse of measured pressure, and at the same time the the time dependence of the potential difference at the main electrodes and determine the pressure from the expression

where V is the value of a constant voltage applied to a flat additional electrode;

d is the plate thickness; and - potential difference arising at the main electrodes when subjected to a pressure pulse;

A is constant for the material of the dielectric plate; P - the required giving.

R - tg.

Claims (1)

SUMMARY OF THE INVENTION A method for measuring pulsed pressure using a pressure sensor having a dielectric plate with two main electrodes, characterized in that, in order to increase the measurement accuracy, an additional flat electrode is placed in parallel with the main electrodes in the dielectric plate, a voltage from a constant source of 2θ is applied to the additional electrode voltage, then an additional electrode is disconnected from the DC voltage source, act on the sensor with a pulse of the measured pressure, one temporarily remove the potential difference temporal dependency on the main electrodes and the pressure determined from the expression P - ILS * 30 _υ where V is the magnitude of the constant voltage applied to the additional flat electric °; d is the plate thickness; 35 and - the potential difference that occurs on the main electrodes when exposed to a pressure pulse; A - constant for the material of di40 electric plate; P is the desired pressure.