JPS57152245A - Transmitter for ultrasonic signal - Google Patents

Transmitter for ultrasonic signal

Info

Publication number
JPS57152245A
JPS57152245A JP3757581A JP3757581A JPS57152245A JP S57152245 A JPS57152245 A JP S57152245A JP 3757581 A JP3757581 A JP 3757581A JP 3757581 A JP3757581 A JP 3757581A JP S57152245 A JPS57152245 A JP S57152245A
Authority
JP
Japan
Prior art keywords
transmitter
ultrasonic
ultrasonic wave
water
oscillating 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
JP3757581A
Other languages
Japanese (ja)
Inventor
Kiyoshi Sasaki
Takanori Fujisawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP3757581A priority Critical patent/JPS57152245A/en
Publication of JPS57152245A publication Critical patent/JPS57152245A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

PURPOSE:To disconnect a weight from a body dipped in water by an ultrasonic wave by throwing into water an ultrasonic-wave signal transmitter constituted of an ultrasonic wave transmitter driven with an oscillating circuit, and a battery supplying electric power to the transmitter, and oscillating circuit, which are sealed in a pressure-tight container. CONSTITUTION:A pressure-tight container 4 contains a battery 1, an ultrasonic wave oscillating circuit 2, and an ultrasonic wave transmitter 3. Then, an ultrasonic-wave transmitter 6 having the container 4 is thrown into water from a boat 5 and when it reaches some depth, an oscillation signal is received by a disconnecting device 8 to perform disconnecting operation.
JP3757581A 1981-03-16 1981-03-16 Transmitter for ultrasonic signal Pending JPS57152245A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3757581A JPS57152245A (en) 1981-03-16 1981-03-16 Transmitter for ultrasonic signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3757581A JPS57152245A (en) 1981-03-16 1981-03-16 Transmitter for ultrasonic signal

Publications (1)

Publication Number Publication Date
JPS57152245A true JPS57152245A (en) 1982-09-20

Family

ID=12501328

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3757581A Pending JPS57152245A (en) 1981-03-16 1981-03-16 Transmitter for ultrasonic signal

Country Status (1)

Country Link
JP (1) JPS57152245A (en)

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