Surface elevation measuring apparatus

Details Surface elevation measuring apparatus Surface elevation measuring apparatus

1979-05-15

1980-10-14

Myracle, Jerry W.

Measuring and testing

Surface and cutting edge testing

Roughness

73573, G01B 528

Patent

active

042274010

ABSTRACT:
A terrain probe for sensing the elevation of a terrain surface whose prof is being measured and followed. A two-phase induction motor will raise or lower the terrain probe in response to either an increase or decrease in the elevation of the terrain surface. A four arm bridge circuit, which has an arm enclosed within the terrain probe, in combination with a low frequency oscillator, a differential amplifier, and power amplifier generate a sinusoidal drive signal which controls the two-phase induction motor.

REFERENCES:
patent: 3153338 (1964-10-01), Kleesattel
patent: 3208272 (1965-09-01), Hall, Jr. et al.
patent: 3534596 (1970-10-01), Batts et al.

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