GRAVITY THREE-COMPONENT GRADIOMETER Russian patent published in 1995 - IPC

FIELD: gravimetric instrumentation engineering. SUBSTANCE: gravity three-component gradiometer has measuring device and accelerometer encapsulated in case incorporating sensitive system with flexibly jointed inertial mass. In this case sensitivity axis of accelerometer forms angle with direction of vertical and case of accelerometer is mounted for turning relative to vertical axis. Inertial mass of accelerometer is manufactured in the form of permanent magnet, magnetic circuit and pole piece and is suspended in case with the aid of guiding springs and screw spring which upper is installed for movement over vertical. Mass of sensitive system is provided with movement indicator and additional force pickup which windings are connected to D. C. source. Measuring device is manufactured in the form of current meter placed in supply circuit of winding of additional force pickup. Case of accelerometer is mounted for additional movement along direction towards sensitivity axis of accelerometer. EFFECT: simplified design, enhanced reliability. 2 dwg