METHOD OF DYNAMIC MEASUREMENT OF ANGULAR DISPLACEMENTS Russian patent published in 1999 - IPC

FIELD: measurement technology. SUBSTANCE: method can be used to measure angles with the use of laser gyroscope with changeable support, for instance, while measuring profile of railway tracks of high-speed railways and in mix of fast platform-free inertial systems. Marking function and two sequences of counting pulses are formed from two analog signals picked off laser gyroscope with changeable support and shifted one relative to another by π/2,. Counting pulses are integrated with shift of integration start by time equal to half-period of marking function. Integration results are used to evaluate values of measured angular displacement across intervals multiple of integral number of periods of marking function. Function of changeable support is formed and sequences of counting pulses are additionally integrated across 2/h-1/time intervals formed in symmetry with reference to zero transfer of function of changeable support. In this case durations of intervals depend in certain way on period of function of changeable support. As a result of additional integration there are obtained values of increment of integral that do not depend on function of changeable support but depend on character of change of input angular speed which makes it possible to generate additional values of measured angular displacements with the aid of certain recursive algorithm. Given method makes it possible to carry out dynamic measurements of angular displacements with frequency exceeding frequency of vibrations of changeable support by factor of 2n and to increase accuracy of monitoring changes of angular displacements. EFFECT: increased monitoring accuracy of changes of angular displacements. 5 dwg