SU977741A1 - Inclinometer - Google Patents

Description

The invention relates to field geophysics and can be used in the technology of measuring zenith angles and azimuth angles to construct a profile of warped squigars.

Known inclinometers are available that contain a zenith angle meter (for example, a pinnacle type) and an azimuth meter (for example, a three-degree gyro) .1.

These inclinometers are not accurate enough to determine the azimuth. They cannot make continuous measurements while moving a well

Also known is an inclinometer for determining the zenith angle and azimuth, comprising a housing, a sensitive element made in the form of a tandem with zero intrinsicity, the suspension of which is driven into rotation, by a motor shaft, a device for picking up a signal 21.

The disadvantage of such an inclinometer is the presence of measurement errors due to the influence of angular accelerations, which WILL be able to achieve significant values, and the use of the natural frequency of oscillation of the sensitive element.

The purpose of the invention is to increase the natural frequency of oscillation of the sensitive element and the accuracy of measurements.

The goal is achieved by the fact that in the inclinometer containing the case the sensitive element, the suspension of which is set in rotation by the motor shaft,

10 removal of the sensor, the sensing element is made in the form of two inertial masses, kinematically connected with each other and provided with adjustable elastic angle limiters

15 turns.

The drawing shows a diagram of the inclinometer.

The inclinometer includes a housing 1, a sensing element, made

Claims (2)

20 in the form of two inertial masses - a ring 2, which sits freely on the axis 3, and a flywheel 4, located on the same axis inside the ring 2, a suspension 5, a sensitive element, an electric motor 6, a device 7 for removing the signal and adjustable elastic angle stops turning 8. The ring 2 is kinematically connected with the flywheel 4 (for example, by means of a gear transmission 9). Inklinrmetr works as follows. In the course of the movement of the inclinometer and the inclined borehole on the sensitive element in the suspension 5 rotating from the engine (ring 2 and flywheel 4) installed in body 1, the moments of centrifugal and Coriolis inertia forces start to act, under the influence of which the sensitive element begins to oscillate 51 rotation about the axis 3. The equation of the dynamics of such a mechanical system, taking into account the kinematic connection of the inertial masses 2 and by means of a gear transfer 9 (gear ratio -t), the following way: C3, fD.J)) | bvt; KvHDa- :))) V ё soy ffL-i) - 0 soy sit-e infLt), where 3, 0,, 3 are the moments of inertia of the ring with respect to the axes X, Y , 1,1 1 moments of inertia of the flywheel 4n ai zi relative to the respective axes; - the angle of rotation of the ring, measured by means of a device for removing the signal 7 K - the specific ratio of the elastic forces acting on the sensitive element from the side of the adjustable turn stops 8; L is the specific coefficient of the damping element, which is relative to axis 3 relative to the sensitive element; dL is the azimuth; & - zenith "angle. . If it is necessary that 1AL then the inertial moments of the ring 2 and the flywheel 4 from the portable accelerations 4, k are mutually compensated, and the motion equation of the sensitive element has the form, H) ib toib KH: JaO) ft ((: Zr-e X 5- 1i C and Si-t-ecosct-t) and the errors in measuring the angular velocities of the boom & m from portable accelerations J.JiH & K & no.According to the forced oscillations of the ring 2, the angular velocity About 01POI &, and then zenith angle and azimuth (2) .-. The range of often accurate measurement of angular velocity is determined by its own oscillation frequency of the sensitive element, which, taking into account (3), is expressed by the following formula:. -. -h, -KK ach-Zg-Eg) 1 ° L-3, 3) J The presence of elastic adjustable angle stops allows increase the natural frequency of oscillation of the sensitive element to a predetermined limit (10-20 Hz), thereby improving the accuracy and dynamic characteristics. It should also be noted that with the help of these limiters it is possible to adjust the maximum deflection angle of the sensitive element, which for a given measurement accuracy can be set (from several tens of minutes to 5-7), Thanks to the performance of a sensitive element in the form of two inertial masses, kinematically between themselves, and the presence of adjustable elastic limiters of the angle of rotation of the sensitive element, the proposed inclinometer differs favorably from the known ones. The invention Inclinometer, comprising a housing, a sensitive element, the suspension of which is connected with the motor shaft, a node for picking up a signal, characterized in that, in order to increase the natural frequency of oscillation and measurement accuracy, the sensitive element is made in the form of two inertial masses, kinematically connected between each other and equipped with adjustable angle stops. Sources of information taken into account during the examination 1. Mikhailovsky V.N. and Ivanov S.K. Measurement of the curvature of the wells. Edition of the Academy of Sciences of the Ukrainian SSR, I960. 2. USSR author's certificate number 663826, cl. E 21B 47/022, 1979,