SU731291A1 - Inclination meter testing device - Google Patents

Description

one

The invention relates to a measurement technique and can be used when checking the parameters of precision tilt angle meters with respect to the horizon.

Apparatus for testing tilt meters with the help of an optical dividing head are known, comprising a housing, a movable part with a test tiltmeter, angular displacement meters of the moving part and an output signal of the tiltmeter 1.

These devices have a non-linear characteristic of defining tilt angles, which makes them difficult to use.

Also known are devices analogous to JCH4Horo assignment, equipped with a drive for moving the movable part to a predetermined destination 2.

The closest to the invention to the technical essence is a device comprising a housing, a movable part with a test tiltmeter, a transducer of linear displacements of the movable part to its angular displacement, a gauge of linear displacements of the movable part and

tiltmeter output signal meter 13.

However, this device does not provide adequate accuracy of the definition of Lenin nonlinearity -characteristics of precision tiltmeters. The latter is explained by the error in calculating the nonlinearity associated with the zero drifts and the scale factor of the tiltmeter as a result of the destabilizing factors during the determination of the static characteristic of the test tiltmeter.

15 The purpose of the invention is to improve the accuracy of determining the nonlinearity of the tiltmeter characteristic.

This goal is achieved in that a device for testing tiltmeters, comprising a housing, a movable part with a tilt meter under test, a transducer of linear movements of the movable part to its angular movement, a gauge of linear displacements of the moving part, and an output meter of the tiltmeter, is driven to evenly move the movable part into horizontal direction

30 and twice differentiating link.

connected between the tiltmeter and the meter of its Bwxofltioro signal, and the linear displacement transducer of the movable part to its angular displacement is made in the form of two planes inclined to the horizon in contact with the movable part through the slide supports.

The drawing shows a schematic diagram of the device ..

The device consists of a housing 1, a movable part 2, with the test tiltmeter 3, a linear displacement transducer of the movable part .2 into its angular displacement, made in the form of two planes 4 inclined to the horizon, contacting through the slide supports 5 with the movable part 2, the linear meter displacement of the movable part 2 in the form of a movable rotor 6 and a stator 7 fixed on the body 1, the meter 8 of the output signal of the inclinometer 3 and the twice differentiating link 9 connected between the inclinometer 3 and the meter 8. The movable part 2 using a spring 10 is pressed against the movable rod 11 of the actuator 12 to evenly move the movable part in the horizontal direction.

The device works as follows.

Uniform horizontal displacement ;;. A blade 11 with a speed from the actuator 12 causes a uniformly increasing rotation of the movable part 2 with the test tilt meter 3. around the axis, perpendicular to the plane of the drawing, at an angle .р determined at small angles) of the planes 4 to the horizon by the expression

.

(one)

li is the distance between slip surfaces 5; ; t is the time of movement of the movable part;

22, conversion factor - -V v

e vani device. At the output of the tested cyclone gage 3, a continuous increase in the output signal is observed.

Limiting with sufficient accuracy for practical purposes, taking into account only the quadratic component of the nonlinearity of the static characteristic of the inclinometer, we can write the expression for. its output signal, taking into account (1 as

(2)

where K,. - zero tiltmeter signal;

K. — inclinometer conversion factor;

K - quadratic coefficient

tiltmeter nonlinearity; Tiltmeter nonlinearity is found as a quotient

R

(3)

Thus, to determine the nonlinearity of the test subject's characteristics, the tiltmeter, you must set a uniform rotation speed of the movable part 2, measure the output signal of the tiltmeter after twice differentiation and the signal of the l-linear displacement meter of the movable part, then carry out the nonlinearity calculations according to the relation (3) for points of interest, tiltmeter characteristics. The device allows the determination by reference points of the static characteristics of the tiltmeter and its sensitivity threshold according to the indications of the linear displacement meter of the moving part based on the use of relation (1).

Entering into the drive device 12 for uniform movement of the movable part 2 with the test tiltmeter 3 and twice differentiating link 9 connected between tiltmeter 3 and the meter 8 of its output signal, and performing this linear displacement transducer into the angular movement of the movable part 2.in the form Inclined - to the horizon planes 4, which come into contact through the sliding supports 5 with the moving part, allows to increase the accuracy of determining the nonlinearity of the tilt-meter characteristic due to the reduced error in the reference the speed of rotation of the movable part 2 with the tiltmeter 3 and the shortening of the measurement time.

Reducing the measurement time, achieved by eliminating the inconsistency of building a point-based static characteristic of the tiltmeter and then calculating its non-linearity, allows proportionally (almost more than an order of magnitude) to reduce the error from zero drift and, scaling factor, of the tiltmeter.

Claims (1)

Invention Formula A device for testing nakLonomerov, containing a housing, a movable bed with a test n. Inclinometer, a transducer of linear displacements of a movable part into its angular displacement, a linear displacement meter of the movable part, and a tilt meter signal output indicator, accuracy of determining the nonlinearity of the tiltmeter characteristics; a drive for uniform moving the moving part in the horizontal direction and a twice differentiating element connected between the klonomerom and the output meter and the linear displacement Vatel mobility hydrochloric portion in its angular displacement is in the form of two inclined to the horizontal plane, I will contact them via sliding bearings with podizhnoy part. Sources of information, rintye taken into account in the examination: 1. Copyright "" I ° d; o. -G .; oG. . Mr. .fe ::% r “developmental science. M., Nedra,, p. 99-10-1 (prototype). I / n /: i // / 2 U v