Device for multimeasurement of vertical position variation and a

Details Device for multimeasurement of vertical position variation and a Device for multimeasurement of vertical position variation and a

1989-07-31

1991-04-30

Cuchlinski, Jr., William A.

Measuring and testing

Liquid level or depth gauge

Hydrostatic pressure type

328235, 52421, G01F 2316

Patent

active

050107682

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention relates to a device for multimeasurement of vertical position variation and to a level-setting system equipped with a device of this type.
2. Description of the Prior Art
A measurement of vertical variation in position of one or a number of predetermined points of an industrial or scientific construction or installation, which makes it possible to follow a change in level of these points, often proves essential for good maintenance of said construction or installation. In fact, good operation of a structure such as a dam or an industrial or scientific installation such as a synchrotron is largely dependent on relative stability of its different parts. In point of fact, a construction or installation of this type often extends over a large land area whose structure, composition and hydrographic state may change from one location to another and cause unequal sliding of its strata or heterogeneous land subsidence which disturbs the operation or impairs the strength or good operation of the construction or installation considered. In a scientific installation such as that of a synchrotron, a variation in level by a value of one-tenth of a millimeter can already have an adverse effect on its operation or industrial or scientific exploitation. In order to overcome this drawback, some thought has been given to the possibility of controlling the variation in level of the principal points of an installation of this type by laser sighting. However, these points are often remote from each other or concealed with respect to each other. In order to obtain rapidly or at any moment data relating to the variation in level of these points, each point has to be equipped with a laser emitter and with an associated receiver. Equipment of this type entails the need for substantial capital outlay.
The present invention aims to circumvent these disadvantages by permitting the construction of an economical device for multimeasurement of vertical position variation which is capable of detecting variations of small values of the order of one-tenth of a millimeter and of an economical and effective level-setting system equipped with a device of this type which is capable of carrying out in an industrial or scientific installation even a position adjustment of its principal points by a small value of the order of one-tenth of a millimeter.


SUMMARY OF THE INVENTION

In accordance with the invention a device for multimeasurement of vertical position variation of one or a number of predetermined points of an industrial or scientific construction or installation essentially comprises means for measuring pressure which appears at the locations of said points and the variation of which is directly related to a variation in level of said points.
A system for level-setting of one or a number of predetermined points of an industrial or scientific installation such as that of a synchrotron equipped with a device for multimeasurement of vertical position variation of said points essentially comprises an assembly for level compensation involving dimensional change by thermal action, said assembly being inserted between said point or points and its support or their supports.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of a device constructed in accordance with the invention for multi-measurement of vertical position variation.
FIG. 2 is a partial schematic view to a different scale showing the device of FIG. 1.
FIG. 3 is a partial schematic view to a different scale showing an alternative embodiment of the device of FIG. 1.
FIG. 4 is a partial schematic view to a different scale showing a level-setting system constructed in accordance with the invention and equipped with the device of FIG. 1 for multimeasurement of vertical position variation.
FIG. 5 is a partial schematic view to a different scale showing an electron synchrotron in which are mounted the vertical position variation multimeasurement device of FIG. 1 and the level-setting system of FI

REFERENCES:
patent: 4026156 (1977-05-01), Bowditch et al.
patent: 4356639 (1982-11-01), Opazo
patent: 4651433 (1987-03-01), Mohr

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