Weighting circuit for an electrical torque signal in a drilling

Details Weighting circuit for an electrical torque signal in a drilling Weighting circuit for an electrical torque signal in a drilling

1982-07-07

1984-01-17

Goldberg, Elliot A.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307350, H01H 3500

Patent

active

044265883

ABSTRACT:
A weighting circuit operates to process a torque signal which may be produced by a strain gauge located within the handle of a drilling machine. The circuit includes a first sensor device for receiving the torque signal, and an integrator which integrates the torque signal when the amplitude of the torque signal exceeds a certain level as determined by the first sensor device. The output of the integrator is applied to a second sensor device which operates to switch off the machine when a predetermined integration value produced by the integrator is exceeded. The torque signal thus can be evaluated very thoroughly with the present circuit, so that improved control over the response of a drilling machine during blocking, jamming or twisting conditions, can be obtained.

REFERENCES:
patent: 4030010 (1977-06-01), Schwartz
"FET Databook" National Semiconductor, Santa Clara, CA., 1977, pp. 6-26-6-36.
"Linear Applications, vol. 1", National Semiconductor, Santa Clara, CA., 1973, AN-63, pp. 1-12.

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