SU1065688A1 - Device for determination of deviation of movable object from the vertical - Google Patents

Abstract

A DEVICE FOR DETERMINATION OF THE ANGLE OF DEFLECTION OF A MOBILE OBJECT, FROM A VERTICAL, containing a sealed housing filled with a liquid, the measuring mat suspended in it. The hydraulic damper with a flap and angle transducer, characterized in that, in order to increase the measurement accuracy when subjected to alternating acceleration by ensuring the optimum degree of damping, the hydraulic damper flap in it is filled in the form of a truncated disk mounted in the housing an additional axis located in the same plane and on the same vertical with the axis of suspension of the measuring frame. about ate with oo os

Description

The invention relates to a measurement technique, more specifically to sensors measuring angular coordinates and intended for use in control systems for angular pairs of meters of moving objects. The sensors of the angle of inclination from the vertical are known, consisting of a sealed enclosure, partially filled with electrolyte, and four electrodes isolated together, arranged in pairs one against the other along the walls of the annular channel made in the enclosure. In the sensor for controlling the degree of damping in the annular channel, a rotary valve is installed, which together with the housing constitutes a throttle device. The flap has a fixed position, so the degree of damping, defined by the cross section of the gap between the flap and the housing, remains constant tl. However, with a large slit section, the degree of damping will be insignificant, and, as a result, the useful signal will be distorted due to interference in the form of alternating linear acceleration. Reducing the slit cross section increases the hydraulic resistance and increases the degree of damping. This leads to a decrease in the deviation of the tiger under the action of alternating linear acceleration, i.e. to reduce the distortion of the useful signal due to interference. However, an increase in the degree of damping distorts the useful signal — the angle of rotation of the object, measured by a dial, if the change in the angle of the rotation of the object is dynamic. 1It is obvious that the optimum degree of damping can be selected only for a specific mode of change of the useful signal i; interference. On mobile objects such a mode is not known in advance and is diverse. It follows from this that the VTO sensor of the deviation angle from the vertical type with a constant degree of damping does not guarantee minimal distortion from the effect of alternating linear acceleration. The closest to the invention to the technical essence and the achieved result is a device for determining the angle of deviation from the vertical of a movable object containing a housing filled with damping fluid, a pilot and a hydraulic damper that reduces the measurement error under the influence of accelerations 2. The disadvantage of this device is that that it limits the possibility of increasing the degree of damping with a change in the magnitude of the acceleration. The aim of the invention is to improve the measurement accuracy when exposed to alternating linear acceleration by providing an optimum degree of damping. The goal is achieved by the fact that in a device for determining the angle of deviation of a moving object from the vertical, containing a sealed housing filled with liquid, a measuring tube suspended in it, a hydraulic damper with a damper and an angle converter, the damper of the hydraulic damper is made in the form of a truncated tandem disk, suspended in the housing. on an additional axis located in the same plane and on the same vertical with the axis of suspension of the measuring instrument. Figure 1 shows the sensor, a general view; FIG. 2 shows the position of the measuring tiger and the tandem disk under the action of acceleration; fig.Z - the same, when turning the body; Fig. 4 shows the deviation of the measuring satellite under the action of linear acceleration (curve 7 corresponds to a device with a constant cross section of the slit, and curve 8 to a device with a disk disk; figure 5 shows the dependence of the oscillation amplitude of the measuring satellite (curve 9 corresponds to a device with a constant cross section of the slit, and curve 10 with a tandem disk. The device (Fig. 1) consists of a housing 1, inside which is placed a measuring template 2 with an axis of rotation O; a partition 3, a disk tnik 4 with the axis of rotation O; potentiometer 5 mounted on the body Sec 1, current collector brush b, connected to a tank 2, arresting device and electrical connector (not shown). The cylindrical cavity (body) of the device is sealed and filled with a damping fluid, such as transformer oil. Hydraulic: a damper consisting of a switch: A village 3 and a butterfly valve in the form of a truncated disk 4, serves to automatically adjust the degree of damping depending on the amplitude of the acceleration acting perpendicular to the axis of the tilt. The device works as follows. The disk-tambour 4, deflected under the action of acceleration, reduces the cross-section of the slit S through which the fluid flows (figure 2). The greater the magnitude of the acceleration, the larger the angle fb deflector 4 and the greater the reduction in the flow area S of the slit; The flow of fluid becomes difficult, and measuring pattern 2, having experienced increased resistance, will deviate by a smaller angle. Due to this, less distortion of the transducer is achieved. When the device case 1 is rotated at an oto angle (useful signal) in a clockwise direction (FIG. 3), the counter-flow of liquid, acting on dial 4, will tend to turn it clockwise too. The 14 section will decrease slightly, so the degree of damping will change.

In experimental verification, the statements made are fully confirmed. The graph (Fig. 4) shows the dependence of the deviation angle of the measuring instrument on the amplitude of the alternating acceleration, and curve 7 is obtained with a fixed disk 4, when the cross section of the throttle slit does not change, and curve 8 is obtained with a moving

disk tutorial 4. From the comparison of curves 7 and. 8 that with increasing acceleration, the amplitude of the deflection of the measuring frame is much smaller for the case of installing the valve in the form of a truncated fixed disk.

FIG. 5, where is the amplitude of the deviation angle of the device, cL of the device, shows the dependence of the relative amplitude -t-on the oscillation frequency of the case

oto

around the axis for the same chokes. Curve 9 corresponds to a fixed disk 5 and curve 10 to a movable one.

From the graph it can be seen that up to a frequency of 2 Hz C5 significant difference between

no curves are observed. The experiment shows that the error

the device is halved compared to the known acceleration of 2 m / s, and tripled with an acceleration of 6 m / cm.

L, 75

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9

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1.5

Claims (1)

DEVICE FOR DETERMINING AN ANGLE OF DEFLECTION OF A MOBILE OBJECT FROM A VERTICAL, containing a sealed housing filled with liquid, a suspended pendulum in it, a hydraulic damper with a damper and an angle transducer, characterized in that, in order to increase the accuracy of measurements when exposed to alternating acceleration by ensuring optimal * degree of damping, in it the damper of the hydraulic damper is made in the form of a truncated disengagement pendant suspended in the housing on an additional axis located in hydrochloric plane and on the same vertical with the axis of suspension of the pendulum measurement. FIG. 1