JPS54157100A - Ultrasonic warning unit - Google Patents
Ultrasonic warning unitInfo
- Publication number
- JPS54157100A JPS54157100A JP6556378A JP6556378A JPS54157100A JP S54157100 A JPS54157100 A JP S54157100A JP 6556378 A JP6556378 A JP 6556378A JP 6556378 A JP6556378 A JP 6556378A JP S54157100 A JPS54157100 A JP S54157100A
- Authority
- JP
- Japan
- Prior art keywords
- absolute value
- circuit
- reflection signal
- output end
- fixed reflection
- 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)
- Emergency Alarm Devices (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6556378A JPS54157100A (en) | 1978-05-31 | 1978-05-31 | Ultrasonic warning unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6556378A JPS54157100A (en) | 1978-05-31 | 1978-05-31 | Ultrasonic warning unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54157100A true JPS54157100A (en) | 1979-12-11 |
Family
ID=13290597
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6556378A Pending JPS54157100A (en) | 1978-05-31 | 1978-05-31 | Ultrasonic warning unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54157100A (ja) |
-
1978
- 1978-05-31 JP JP6556378A patent/JPS54157100A/ja active Pending
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