Boots – shoes – and leggings
Patent
1984-11-28
1987-07-14
Lall, Parshotam S.
Boots, shoes, and leggings
324160, 328133, 364484, 364550, G01P 342, G01R 2300
Patent
active
046807217
ABSTRACT:
The circuit arrangement processes two input signals which are periodically variable as a function of the position of a moving part and particularly of the angle of rotation of a rotating part and which are phase-shifted by approximately 90.degree. with respect to each other and have a sinusoidal or sine wave-like characteristic. In an inverting circuit, inverted input signals are generated. A curve change-over switch assembles from the input signals and the inverted input signals two sequences of similar signals sections which are divided in a divider circuit which forms quotient signals which represent the variation of the tangent function. The y signals are then converted in a tangent/arc tangent converter by forming the arc tangent function into an at least approximately sawtooth-shaped voltage signal which consists of path-proportional path signals. These path signals are differentiated with respect to time in a differentiating circuit and finally the step positions of the differentiating operation are removed from the signals in a circuit. The result analog output signal is a voltage u which is proportional to the speed of the moving part and which can be supplied as actual speed of rotation to a servo control loop.
REFERENCES:
patent: 3496565 (1970-02-01), Jenkins
patent: 4019145 (1977-04-01), Rathe
patent: 4380733 (1983-04-01), Yano et al.
Lall Parshotam S.
Mavilor Systemes S.A.
Teska Kevin J.
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