JPS5426698A - Alarm unit using ultrasonic waves - Google Patents

Alarm unit using ultrasonic waves

Info

Publication number
JPS5426698A
JPS5426698A JP9265777A JP9265777A JPS5426698A JP S5426698 A JPS5426698 A JP S5426698A JP 9265777 A JP9265777 A JP 9265777A JP 9265777 A JP9265777 A JP 9265777A JP S5426698 A JPS5426698 A JP S5426698A
Authority
JP
Japan
Prior art keywords
ultrasonic waves
alarm unit
output
wave detector
amplifier
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
JP9265777A
Other languages
Japanese (ja)
Inventor
Hiroshi Ohashi
Hironobu Inoue
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.)
Panasonic Electric Works Co Ltd
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 JP9265777A priority Critical patent/JPS5426698A/en
Publication of JPS5426698A publication Critical patent/JPS5426698A/en
Pending legal-status Critical Current

Links

Landscapes

  • Burglar Alarm Systems (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: To reject the reflection from the fixed object, by comparing the wave detector output with the absence of mobile object and the amplitude of the variable gain amplifier output, and by controlling the amplifier so that the output of wave detector can always be increased.
COPYRIGHT: (C)1979,JPO&Japio
JP9265777A 1977-07-30 1977-07-30 Alarm unit using ultrasonic waves Pending JPS5426698A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9265777A JPS5426698A (en) 1977-07-30 1977-07-30 Alarm unit using ultrasonic waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9265777A JPS5426698A (en) 1977-07-30 1977-07-30 Alarm unit using ultrasonic waves

Publications (1)

Publication Number Publication Date
JPS5426698A true JPS5426698A (en) 1979-02-28

Family

ID=14060530

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9265777A Pending JPS5426698A (en) 1977-07-30 1977-07-30 Alarm unit using ultrasonic waves

Country Status (1)

Country Link
JP (1) JPS5426698A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61265899A (en) * 1985-05-21 1986-11-25 東芝ケミカル株式会社 Multilayer printed circuit board
JPS6428890A (en) * 1987-07-23 1989-01-31 Risho Kogyo Kk Manufacture of multi-layer (over 4 layers) printed wiring board
JPH0339190U (en) * 1989-08-28 1991-04-16
JPH1151558A (en) * 1997-07-28 1999-02-26 Daido Hoxan Inc Air separator
WO2016136371A1 (en) * 2015-02-23 2016-09-01 三菱電機株式会社 Movement distance measuring device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61265899A (en) * 1985-05-21 1986-11-25 東芝ケミカル株式会社 Multilayer printed circuit board
JPS6428890A (en) * 1987-07-23 1989-01-31 Risho Kogyo Kk Manufacture of multi-layer (over 4 layers) printed wiring board
JPH0339190U (en) * 1989-08-28 1991-04-16
JPH1151558A (en) * 1997-07-28 1999-02-26 Daido Hoxan Inc Air separator
WO2016136371A1 (en) * 2015-02-23 2016-09-01 三菱電機株式会社 Movement distance measuring device
JPWO2016136371A1 (en) * 2015-02-23 2017-08-03 三菱電機株式会社 Moving distance measuring device

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