SU1565209A1 - Automatic gyrocompass - Google Patents

Abstract

The invention relates to instrumentation and can be used in mine surveying in the construction of subways and tunnels, in topographic preparation of the area. The purpose of the invention is to improve the accuracy of the gyrocompass by implementing an additional measurement mode near the direction to the South. The invention allows a permissible initial precession speed of the sensing element 1 and a tolerable deviation of the sensing element from the orientation to the South, which determines the logical device 9. The switching device 10 according to information from the logical device 9 sends a command to the torque sensor 8 to translate the sensitive element 1 to a predetermined position . 1 il.

Description

The invention relates to instrumentation and can be used in surveying during the construction of the subway and tunnels, with topographic preparation of the terrain.

The purpose of the invention is to increase the accuracy of the gyrocompass (GK) by implementing an additional measurement mode near the south-jq direction (determining an unstable equilibrium position by uncontrolled precession movement of a sensitive element (SE).

The drawing shows a functional diagram of the proposed gyrocompass.

The gyrocompass contains a suspended SE 1, an autocollimation tracking system (ASO) 2, a sensor 3 20 an output angle code associated with a computing device 4, a control panel 5 connected to an autocollimation tracking system, a locking mechanism 6, 25 a damping system 7 with a sensor 8 moment, a logical device 9 associated with a computing device, with an autocollimation tracking system and with a switching device 1E jq. Device-U is connected to system 7 and sensor 8.

The gyrocompass operates as follows.

at once. ,

After 1 .razarretirovaniya CHE mechanism 6 activated simultaneously systemic _d threads 2 and 7. 2 AFR tracking dvizhg-. ChE 1, generates a signal depending on the tracking speed, and which is fed to system 7 as an output signal. The system 7 with the sensor 8 imposes a vertical moment of force on the SE 1 proportional to the ASO 2 signal or monotonically dependent on it. Under the action of the me- nent 45, the force of the SE 1 stops almost after some time. However, SE 1 stops from the initial position by a certain angle at which sizing occurs. The value of the stop angle depends on the energy of the SE received by him at the time of sizing, and in practice amounts to tens of arc minutes. To ensure the measurement in the South, it is required that the initial permissible deviation from the position of unstable equilibrium дор dHeN does not exceed 1 angle, mia_ at the maximum permissible: speed

About To p 1 angular.s / s. This task of translating the CE from the position stopped by the system 7 to the orientation position near the south direction is performed in the automatic gyrocompass of the device 9 and 10. The logic device 9 determines the deviation of the CE 1+ from the position in which it was until the moment of sizing and damping of the oscillations (from the orientation position on sub & Media, calculates the path traversed ChE $ r = 1 - (^ _op q-, generates a signal corresponding to the sign of the deviation of the orientation of the SE to South, and delivers it to the device 10. The device 10 connects the appropriate power field NOSTA or phasing of the sensor 8 and includes autocollimation system 2. The moment of transition in SE count recorded in the logic device 9 and the speed estimated CHE in this position, which is compared with C / d _ap. When _{θό τε! <έ _ · ^} ^ Additional logical device ^ 9 disables the 2nd autocollimation system through device 10 — sensor 8 ^1. The process of translating the CE ends. If Loss> To add »Device 10 issues a command to system 7 to retamp the CE.

The invention allows for an initial velocity allowable ChE On DoC tolerance ^and SE of orientation 'that makes it possible to achieve tracking speed tracking system of autocollimation / d _Co <5 ang / s. near the direction of the SE orientation to the South at the time of processing information about the uncontrolled movement of the SE near the direction to the South, equal to the period of the oscillations of the SE.

The possibility of implementing the regime for determining the unstable equilibrium position 43 by uncontrolled tracking near the south orientation makes it possible to increase accuracy by eliminating errors in the proposed GC caused by the action of systematic harmful moments on the CE, while the GC performance does not deteriorate, since the measurement is close to the South orientation makes it possible to exclude systematic errors, including the error due to the instability of the zero of the suspension of the SE. The time spent on the operation of zeroing the suspension in the well-known Civil Code is commensurate with the time spent on the additional measurement near the South.

At the same time, the accuracy of the HA increases due to the compensation of the following systematic errors:

due to the displacement of the center of gravity of the SE;

due to convection air flows f due to external and internal magnetic inhomogeneities, etc., the parameters of which do not remain unchanged in time, in the temperature and latitudinal ranges.

Claims (1)

SUMMARY OF THE INVENTION An automatic gyrocompass containing a sensing element, a tracking system, an output angle sensor associated with a computing device, a damping system and a torque sensor, characterized in that, in order to improve accuracy, a logical device and a switching device are introduced into it, and the input of the logical device connected to the computing device, the output of the logical device is connected to the switching device and the tracking system, and the output of the switching device is connected to the damping system anija and torque sensor.