Monitoring apparatus

Details Monitoring apparatus Monitoring apparatus

1990-09-28

1992-01-21

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Returned signal used for control

367 13, G01S 1500

Patent

active

050832980

ABSTRACT:
A monitoring apparatus is described for the contact-free monitoring of a region adjacent to a service robot of a ring spinning machine. The apparatus includes an electro-acoustic converter for transmitting a sonic signal which is divided into a sonic measurement signal S.sub.SM and a sonic reference signal S.sub.SR. An electronic control unit delivers a fault signal if no sonic signal has been received by the expiry of a reference transit time. If, on the other hand, a sonic measurement signal is received prior to the expiry of the reference transit time, the control unit delivers a recognition signal to indicate the presence of an object in the monitored region.

REFERENCES:
patent: 3220005 (1965-11-01), Benoit
patent: 3851168 (1974-11-01), Erbstein
patent: 3876969 (1975-04-01), Price
patent: 4120389 (1978-10-01), Erickson
patent: 4706227 (1987-11-01), DuVall et al.
Biehi, Karl-Ernst, Contact-Free Distance Measurement, Elecktronic, vol. 32, No. 26/1983.
Ahrens, U.: Moglichkeiten and Grenzen des Einsatzes Van Luft--Ultraschallsensoren in Der Montage--und Handhabungstechnik. In: Roboter-Systeme, 1.203-210, 1985.

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