LINEAR MOVEMENT TRANSDUCER Russian patent published in 2009 - IPC G01B7/00 

FIELD: physics, measurements.

SUBSTANCE: invention is related to the field of instrumentation equipment. Transducer comprises differentially-transformer detector 3, which consists of primary supplying winding 2, two secondary half-windings 4, 5, movable anchor 15, fixed on object of measurement. Unit of detector supply 1 provides for supply of primary supplying winding 2. Outlet of clock oscillator 12 is connected to inlet of synchronisation unit 13. Outlet of synchronization unit 13 is connected to supply unit 1 and to synchronous input of selection/storage device 10. Inlet of the first amplifier 9 is connected to outlet of matching divider 8, and outlet - to metering input of selection/storage device 10. Outlet of selection/storage device 10 is connected to inlet of the second amplifier 11, and outlet of the second amplifier 11 is outlet of transducer. Compensation secondary half-winding 5 of detector 3 is connected by single outlet to zero bus and with the second outlet to the first outlet 21 of the first switching unit 6 and the second outlet 19 of the second switching unit 7. Working secondary half-winding 4 of detector 3 is connected by one outlet to inlets of the first 6 and second 7 units of switching. The second input 16 of the first switching unit 6 is connected to the first outlet of the first resistor R1 of matching divider 8. The first inlet 20 of the second switching unit 7 is connected to the first outlet of the second resistor R2 of matching divider 8. The second outlets of matching resistors R1 R2 are connected to load resistor R3 and inlet of the first amplifier 9. With the help of switching units 6 and 7 of secondary half-windings 4, 5 their changeover takes place from opposite connection (mode-"measurement") to matching connection (mode-"control"). In mode "control" with the help of matching divider 8 it is possible to establish specified value of working and control output signals.

EFFECT: improved reliability due to control of transducer condition.

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