JPS5539057A - Moving body detector using ultrasonic wave - Google Patents
Moving body detector using ultrasonic waveInfo
- Publication number
- JPS5539057A JPS5539057A JP11295378A JP11295378A JPS5539057A JP S5539057 A JPS5539057 A JP S5539057A JP 11295378 A JP11295378 A JP 11295378A JP 11295378 A JP11295378 A JP 11295378A JP S5539057 A JPS5539057 A JP S5539057A
- Authority
- JP
- Japan
- Prior art keywords
- signals
- frequency
- signal line
- frequencies
- transmitter
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/50—Systems of measurement, based on relative movement of the target
- G01S15/52—Discriminating between fixed and moving objects or between objects moving at different speeds
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Traffic Control Systems (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
PURPOSE:To make it possible to shorten the transmission period and to detect the received signals in a separate manner by alternately driving a plurality of transmitter-receivers using an oscillator in different frequencies through a common signal line. CONSTITUTION:A moving body detector is composed of: transmitter-receivers 20 and 21, which have their corresponding signal terminals connected through common signal lines and which are equipped with oscillators; oscillatory circuits 38 and 39 for generating frequencies f1 and f2; a transmission control circuit 40 for alternately feeding the signals of the frequencies f1 and f2 to the common signal line thereby to drive the transmitter-receiver 20 or 21; and a received wave selecting circuit 58 for selecting either the component of the frequency f1 of the receives signals, after the signals of the frequency f1 are fed to the signal line, or the component of the frequency f2 of the received signals after the signals of the frequency f2 are fed to the signal line. The reverberation signals of the oscillators are detected at 30 so that the frequencies f1 and f2 are adjusted.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11295378A JPS5539057A (en) | 1978-09-14 | 1978-09-14 | Moving body detector using ultrasonic wave |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11295378A JPS5539057A (en) | 1978-09-14 | 1978-09-14 | Moving body detector using ultrasonic wave |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5539057A true JPS5539057A (en) | 1980-03-18 |
Family
ID=14599654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11295378A Pending JPS5539057A (en) | 1978-09-14 | 1978-09-14 | Moving body detector using ultrasonic wave |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5539057A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57191580A (en) * | 1981-05-20 | 1982-11-25 | Omron Tateisi Electronics Co | Two-frequency type ultrasonic vehicle detector |
JPS58154682A (en) * | 1982-03-09 | 1983-09-14 | Mitsubishi Electric Corp | Detector of substance |
JPS62159078A (en) * | 1985-12-27 | 1987-07-15 | 株式会社クボタ | Control system of member following up moving body and automatic milking device and automatic milking method |
-
1978
- 1978-09-14 JP JP11295378A patent/JPS5539057A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57191580A (en) * | 1981-05-20 | 1982-11-25 | Omron Tateisi Electronics Co | Two-frequency type ultrasonic vehicle detector |
JPS58154682A (en) * | 1982-03-09 | 1983-09-14 | Mitsubishi Electric Corp | Detector of substance |
JPS62159078A (en) * | 1985-12-27 | 1987-07-15 | 株式会社クボタ | Control system of member following up moving body and automatic milking device and automatic milking method |
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