JPS63284483A - Distance measuring instrument - Google Patents

Distance measuring instrument

Info

Publication number
JPS63284483A
JPS63284483A JP11964187A JP11964187A JPS63284483A JP S63284483 A JPS63284483 A JP S63284483A JP 11964187 A JP11964187 A JP 11964187A JP 11964187 A JP11964187 A JP 11964187A JP S63284483 A JPS63284483 A JP S63284483A
Authority
JP
Japan
Prior art keywords
radio wave
wave
transmission
speed
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11964187A
Other languages
Japanese (ja)
Inventor
Takafumi Arai
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP11964187A priority Critical patent/JPS63284483A/en
Publication of JPS63284483A publication Critical patent/JPS63284483A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To measure the distance between two points without utilizing any reflected wave by finding the distance between the two points according to the difference in time required for transmission between two kinds of signals which differ in transmission speed.
CONSTITUTION: A transmitter 1 is equipped with a radio wave transmission part 1a which sends a radio wave and an acoustic wave transmission part 1b which sends an ultrasonic wave, and radiates the radio wave and ultrasonic waves at the same time. A receiver 2 inputs the outputs of a radio wave receiving circuit 5 and an acoustic wave receiving circuit 6 to a time difference detecting circuit 7, generates a start signal when the output level of the circuit 5 becomes L, and generates a stop signal when the output level of the circuit 6 becomes L. Here, the radio wave has a speed about 106 times as fast as that of the ultrasonic wave, so the time from the stop of the radio wave to the detection on the side of the receiver 2 is found on the side of the transmitter 1 and the distance between the transmitter and receiver 2 is found by considering the propagation speed of the ultrasonic speed.
COPYRIGHT: (C)1988,JPO&Japio
JP11964187A 1987-05-15 1987-05-15 Distance measuring instrument Pending JPS63284483A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11964187A JPS63284483A (en) 1987-05-15 1987-05-15 Distance measuring instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11964187A JPS63284483A (en) 1987-05-15 1987-05-15 Distance measuring instrument

Publications (1)

Publication Number Publication Date
JPS63284483A true JPS63284483A (en) 1988-11-21

Family

ID=14766478

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11964187A Pending JPS63284483A (en) 1987-05-15 1987-05-15 Distance measuring instrument

Country Status (1)

Country Link
JP (1) JPS63284483A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1314957A2 (en) * 2001-11-16 2003-05-28 General Electric Company Method and apparatus for measuring turbine blade tip clearance

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1314957A2 (en) * 2001-11-16 2003-05-28 General Electric Company Method and apparatus for measuring turbine blade tip clearance
EP1314957A3 (en) * 2001-11-16 2005-11-09 General Electric Company Method and apparatus for measuring turbine blade tip clearance
KR100806441B1 (en) * 2001-11-16 2008-02-21 제너럴 일렉트릭 캄파니 Method and apparatus for measuring turbine blade tip clearance
EP2275776A3 (en) * 2001-11-16 2011-09-28 General Electric Company Method and apparatus for measuring turbine blade tip clearance

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