Torquemeter circuit
US3984701A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 10, 1975 |
| Grant date | Oct 5, 1976 |
| Priority date | — |
| Expiry date | Jan 10, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L3/109
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit for generating a potential indicative of torque. The circuit responds to the phase angle between the AC signals generated by two generating coils or magnetoelectric pickups, each excited by a toothed wheel. The two toothed wheels are connected to different points along a shaft transmitting power between an engine and its load. The windup or torsion of the shaft is proportional to torque; therefore, the relative phase angle of the signals from the two pickups is also proportional to torque. Each generating coil is connected to a high-gain input amplifier which generates a square-wave signal in phase with the signal from the coil. Each input amplifier triggers a pulse generator which generates a pulse the leading edge of which is in fixed phase relation to the pickup signal. The two pulse generator outputs are connected to a flip-flop circuit to generate a zero output signal during the interval between the two inputs to the flip-flop. The duty cycle of this signal is indicative of torque. The flip-flop output signal is transmitted through two driver circuits to an averaging circuit including two integrating circuits in series which provides an output potential proportional …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.