SU1261454A1 - Device for measuring acceleration - Google Patents

Description

(46) 10/07/90. Bksh. № 37 (21) 3833897 / 24-10 (22) 02.01.85 (71) Moscow Engineering Physics Institute (72) S.A. Gonchukov, E.D. Protsenko. and PA Usov (53) 531.768 (088.8) (56). Laser measuring systems Ed. F.P. Lukov, M .: Radio and Communications, 1981, Ch. 7.4 and 7.7. U.S. Patent No. 4,048,859, cl. 73-516 1980. (54) (57) 1. DEVICE FOR MEASUREMENT. ACCELERATION, which contains an optically matched laser with a solid-state laser in an emergency resonator element, which is in contact with an inertial mass; a polarizing light filter and a photodetector connected by an output to the main input; a master phase detector and an indication unit characterized in that. that, in order to increase accuracy, two inertial mass drives are introduced into it, one of which is fixed to the laser body, and the other is pivotally connected to the sensitive element, as well as the keystone generator, the driver of the cix pulse and the matching and subtraction unit, Keystone generator. Connected by a balanced output opposite to the drive electrodes and connected to the input of the driver controlled by these signals and with the first input of the phase detector, the second input of which is connected to the output ohm of the matching and subtracting unit and with the display unit, and the output of the command pulse generator is connected to the control input of the frequency meter. 2. The device according to claim I, characterized in that the drives are filled with piezoelectric meters. The invention relates to non-tequel technique and can be used in the field of navigation, geodesy, cartography and travel. The aim of the invention is to improve accuracy. FIG. is a block diagram of the present device; on fng. 2 times above the charts that show his work. The device consists of a laser 1;; an internal resonator solid-state sensor element 2, a control mass 3, two piezodrives A and 5, an elastic membrane (hinge) 6, a multiplex optical filter 7, a photoelectric detector 8, a frequency meter 9, a phase detector 10 of generator 1 control signal, driver 12 and electronic 13 block matching, subtraction and display. The output laser radiation is supplied through a polarization filter 7 to a photodetector 8 connected to a frequency meter 9. Generator II is connected to two piezo actuators A and 5 and connected also to the inputs of the phase detector 10 and the former 12. The latter is connected to the frequency meter 9. The output of the frequency meter is connected to 3 a matching and subtracting unit, which is connected to the fa, a call detector 10 and a display unit 4. The device works as follows. . The output radiation of laser 1, whose spectrum when using phase-anisotropic resonator. And consisting of modes with linear and mutually orthogonal polarizations, enters the photodetector 3, which emits an inter-mode beat beating. In order to obtain the maximum amplitude of the beat signal in front of the photodetector, a polarization filter 7, oriented at an angle of 45 to the area of polarization modes, was used. Frequency of faintings (allocated by photodetectors, recorded at frequency counter 9. The operation control of the PA can be viewed using the time dial shown in FIG. 2. The Ugra (U) signal (FIG. 2a) from the balanced output of the generator 11 is fed to piezodrives 4 and 5, for example, having the form of rings.Connecting the control signal to the electrodes of the upper and lower piezoprivs A - 1 is opposite, which provides the opposite phase change in their internal diameters Dg and DH (Fig. 2b) Behavior of Dg (t) and) in the case of The displacement of the reference mass, 1 medium-shaped cylinder with external diameter D inside the piezodrive is shown in FIG. 2c. At the moment of time t (, n both drives are connected to the control mass. This state is maintained until time t ,. Then, over a time interval, the lower servo ;: disconnects from the control mass (B is increased to the maximum value mchs and the top drive enters in a reliable connection with the reference mass (at the same time). During the time of the next switching of the control signal, from the time t to the time tg both drives are connected to the control mass. From the time t, only the bottom drive pivotally connected to the sensitive By means of an element, etc. Thus, in time, the control mass is periodically connected to the body, then to the sensitive element, and the transfer of the control mass from one drive to another takes place in a short switching time of the control signal. without slippage, it is obviously required that the magnitude of the control signal corresponding to the contact of the actuators with a kok-troll mass should be different (), and the amplitude of the control signal more than doubled this value (U. . () The measurement of the frequency of the beats is carried out with in the time intervals (), (), etc., close to the popuperiode of the control signal T / 2. (Fig. 2d), Therefore, the generator 1 is connected o. shaper 12 pulses of the beginning and end of the count-, postavshchln on the start input of the frequency 9. The output signal of the frequency meter is fed to the electronic unit 13, which matches the voltage levels in the two-ten-one output code. the signal of the frequency meter with the electronic system, reading the values of the frequency of the bi-linear ujfi in the adjacent half-periods, receives the values of the information signal and sends it to the display. In block 14, to obtain the acceleration sign

31261454

faect detector 10 is supplied to the polarization light at

as a reference signal, the sign of the acceleration sign. Sign

generator 11, and as a speed accelerator, the effective ssh of the relative signal from the subtractive phase system (O or 1 G) between the supports of the 13 G block allows you to refuse and examine both the signals from the second receiver and the Btoporo detector .

FIG. 2