SU1673895A1 - Load cell for measuring pressure - Google Patents

Abstract

The invention relates to a measurement technique, in particular, to pressure gauges used in studies of the stress-strain state of various media, in particular, unpaved media. The purpose of the invention is to increase the sensitivity of the mass dose and increase the accuracy by reducing the temperature error. Messdoza is equipped with a rigid partition 2, dividing body 1 in height into two equally sized compartments, covered from above with working die 3, and from the bottom with a similar auxiliary die 4. In each of the working volumes there are also two isolated from the body and diets of the piezoresistor 5 and 6 in the form of flat rings of activated carbon with collector plates 7. In addition, the massdose is provided with a bottom cover 9, creating a third additional volume in the massdose in which the flat spring 10 is placed, due to which the bottom auxiliary w The tampon 4 is pressed against the lower piezoresistor 6, while the lower auxiliary stamp 4 is pivotally coupled to the upper working die 3 by means of a support screw 11, and both piezoresistors 5, 6 are interconnected in series and included in the measuring circuit in the form of a half bridge. 4 il.

Description

Aa

6-B

FIG. 2

ftat (/ n

ft / r0M,

h

v-

- -Јй / л / 49

-Z o

FIG. 3

l #J

R

I

n

FIG. four

Claims (1)

Claim A pressure meter for measuring pressure, comprising a housing, a power transmitting first stamp and a sensing element in the form of a first disk with electrodes on flat faces and insulating gaskets, characterized in that, in order to increase accuracy by reducing temperature error and increasing sensitivity, it is equipped with a second disk identical to the first disk, the second strain with the support screw in the center, a flat spring and a cover, while the disks are made of sealed activated carbon and provided with central holes, and inside three cases, a partition with a central hole is installed, dividing the case into two cavities, the first of which is closed by the first die and the first disk is installed in it, and the second cavity is closed by the second die and the second disk is installed in it, while the cover is attached to the case from the second die which forms a chamber with it, in which a flat spring is mounted, pressing the second stamp against the second disk, and the first stamp contacts the end of the support screw, which is passed through the central hole of the partition. L-l 6-B FIG. 2 FIG. 3 FIG. 4