Telemetry system for floor maintenance machines

Details Telemetry system for floor maintenance machines Telemetry system for floor maintenance machines

1986-03-14

1988-08-23

Caldwell, Sr., John W.

Communications: electrical

Continuously variable indicating

With meter reading

3408251, 34087007, 340679, 340518, 340525, 15339, H04Q 900, G08B 536

Patent

active

047664320

ABSTRACT:
A telemetry system for a surface maintenance machine such as a scrubber or a sweeper has a plurality of sensors which monitor machine operating conditions. The sensors are periodically scanned and repetitive outputs indicative of sensor condition are used to provide tone coded telemetry signals. The tone coded signals are modulated on a suitable carrier frequency and are sent to a receiver which is remote from the sensors. The receiver decodes the tone coded signals to provide a display of the conditions being monitored by the sensors. The tone coded outputs from the transmitter also include an identification of the particular machine which is providing information for the display at the receiver.

REFERENCES:
patent: 3530434 (1970-09-01), Stites et al.
patent: 3803594 (1974-04-01), Klein et al.
patent: 3812492 (1974-05-01), Gotanda
patent: 3952361 (1976-04-01), Wilkins
patent: 4020477 (1977-04-01), Holland
patent: 4207649 (1980-06-01), Bates
patent: 4306329 (1981-12-01), Yoki
patent: 4511974 (1985-04-01), Nakane et al.
patent: 4675935 (1987-06-01), Kasper et al.
patent: 4679271 (1987-07-01), Field et al.
IEEE Standard Dictionary of Electrical and Electronics Terms, Third Edition, 8/10/84, p. 922.

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