Process for monitoring the output signals from a transmitting de

Details Process for monitoring the output signals from a transmitting de Process for monitoring the output signals from a transmitting de

1992-01-21

1994-10-04

Peng, John K.

Communications: electrical

Continuously variable indicating

With calculation

34087021, 324 7682, 307355, 328 29, G08B 2900, G01R 2500

Patent

active

053530195

ABSTRACT:
By rectifying, comparing and X-OR gating two signals (A,B) from a transmitting device (G) that are to be sinusoidal and have a corresponding rotational frequency, of the same amplitude, and ideally offset from one another electrically by 90.degree., a binary signal (RD) is generated that is indicative of whether a disturbance of the two signals (A,B) exists. A processing device (VE) determines if errors exist with respect to the amplitude, the offset or the phase relationship of the signals (A,B) by monitoring the mark-to-space ratio of the binary signal (RD) for its adherence to a ratio of 1:1, and generates a signal indicative of a disturbance when an error is determined to exist. Additionally, by dividing the binary signal (RD) via a 1:8 convertor (U) and monitoring that signal, the processing device can determine if a change in the rotational frequency of the two signals (A,B) of the transmitting device occurs.

REFERENCES:
patent: 4267470 (1981-05-01), Kawakami et al.
patent: 4990767 (1991-02-01), Ernst et al.
Machine Design, vol. 58, No. 4, Feb. 1986, Cleveland, US, pp. 93-98; Sidney A. Wingate: Tracking Down Errors in Linear Encoders.

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