JPS5426698A - Alarm unit using ultrasonic waves - Google Patents
Alarm unit using ultrasonic wavesInfo
- 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
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
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)
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 |
-
1977
- 1977-07-30 JP JP9265777A patent/JPS5426698A/en active Pending
Cited By (6)
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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