Title:
APPARATUS FOR DETECTING POSITION OF OBJECT BEING MEASURED
Document Type and Number:
WIPO Patent Application WO/1984/004961
Kind Code:
A1
Abstract:
An apparatus for detecting the position of an object being measured comprises a means which transmits and receives ultrasonic waves by an ultrasonic wave transmitter-receiver element (53, 73, 93) with respect to an object (65, 82, 103) being measured, such as a small-diameter hole or a narrow groove in a surface, a means (50, 72, 91) which changes the relative positional relationship between the object (65, 82, 103) and the ultrasonic wave transmitter-receiver element (53, 73, 93), and a signal-processing means which detects the position of the object (65, 82, 103) using changes in reflected signal intensity (P1, P2, P3) near the central position of the object (65, 82, 103) when the relative positional relationship is changed, thereby enabling a highly-accurate detection of the position of the object.
Inventors:
OTSUKI TOSHINORI (JP)
MARUYAMA TERUO (JP)
MARUYAMA TERUO (JP)
Application Number:
PCT/JP1984/000287
Publication Date:
December 20, 1984
Filing Date:
June 05, 1984
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
International Classes:
G01B17/00; G01S15/06; (IPC1-7): G01B17/00
Foreign References:
| JPS58167483U | 1983-11-08 | |||
| JPS53133481A | 1978-11-21 | |||
| JPS50954B1 | 1975-01-13 |
Other References:
See also references of EP 0148952A4
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