SU575516A1 - Load cell for measuring pressure of loose media - Google Patents

Description

one

The invention relates to devices for measuring the pressure of flowing media, preferably soils.

Mesdoses are known for measuring the flow of solids containing a membrane associated with a transducer of its movement into an electrical signal.

However, insufficient rigidity of the structure leads to measurement errors. Closest to the invention is a pressure meter for measuring the pressure of flowing media, including throttling magnetoelastic sensitive elements installed between the pressure sensing disk and the bottom of the cylindrical body 2.

However, due to the large height of the body of the dose dozens, it cannot be used to measure the pressure in the bulk solid array, since the stress field is distorted at the place where the dozens are installed, resulting in an unacceptably large error.

The purpose of the invention is to increase the measurement accuracy by decreasing the ratio of the thickness of the mesdose to its transverse size.

To achieve this, the sensitive dosimets of the dose dozens are mixed in glasses placed outside the plates that receive the medium.

The drawing shows the proposed arrangement in two projections.

Plates 1 and 2, for example, in the form of disks are connected along the contour by a flexible insert

3. On the outside of the plates are installed glasses 4 closing holes in the plates 1 and 2.

Inside the glasses there are installed magnetoelastic sensitive elements of the throttle type, each of which is made in the form of a magnetic circuit 5 with an inductance roll 6. The ends of the magnetic cores abut against the inner surfaces of the glasses

4. In order to reduce the height of the mesos, plates 1 and 2 are installed with a minimum gap between them.

Claims (2)

Mesdose works as follows. The pressure of the medium applied to the plates 1 and .2 squeezes them. The total force through the cups 4 is applied to the magtetrucks 5 and defo}) relieves them. In this case, a variable voltage is formed on the windings 6, which is proportional to the applied pressure. The case of the mesdoza has a small height, due to the fact that the plates that perceive the pressure of the medium are located in close proximity to each other. In addition, the sensing elements are mainly located outside the volume, which is limited by the outer surfaces of the plates that absorb the pressure of the medium. The ratio of the transverse dimension of the mesdosa to its height can be 10–15, which provides an increase in the measurement accuracy in the bulk solid array. The area of the protruding surface of the glasses is small in comparison with the surface of the plates. Therefore, despite their relatively high altitude, they have virtually no effect on the error. The invention of a Mesdoz for measuring the pressure of bulk media, mainly of soils, including pressure sensitive plates and magnetoelastic sensitive ones; elements, characterized in that, in order to increase the measurement accuracy by reducing the ratio of the thickness of the dose to its transverse size, the sensitive elements are placed in the glasses installed outside the plates, which reproduce the pressure of the medium. Sources of information, given into account in the examination: 1. Author's registration number 49440, cl. G 01 L 7/08, 1936. 2. Recommendations on the fabrication and application of contact pressure sensors of the soil. Publication of NIISP Gosstro of the Ukrainian SSR, K., 1974, 4.