Ultrasonic control unit for a travelling cutter

Details Ultrasonic control unit for a travelling cutter Ultrasonic control unit for a travelling cutter

1992-11-13

1994-05-03

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Returned signal used for control

404 8405, E02F 384

Patent

active

053094077

ABSTRACT:
Apparatus for controlling the cutting depth of a road grooving machine by vertical adjustment of both the front and rear travelling gear on the basis of a cutting depth control signal, which is generated by a tracer ski by sampling a reference plane, including at least three ultrasonic sensors arranged one behind the other in the direction of movement of the cutter, and an evaluation means for determining the distances between the ultrasonic sensors and a reference plane to derive therefrom an inclination signal as well as an averaged distance signal. The evaluation means controls the height of the two travelling gears such that the average distance of the cutter drum as well as the position of the machine relative to the reference plane are adjusted.

REFERENCES:
patent: 4041623 (1977-08-01), Miller et al.
patent: 4473319 (1984-09-01), Spangler
patent: 4573124 (1986-02-01), Seiferling
patent: 4722547 (1988-02-01), Kishi et al.
patent: 4924374 (1990-05-01), Middleton et al.
patent: 4943119 (1990-07-01), Zarniko et al.
patent: 4961173 (1990-10-01), Sehr et al.
patent: 5009546 (1991-04-01), Domenighetti et al.
patent: 5035290 (1991-07-01), Harms et al.

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