JPS5468200A - Vehicle detector using ultrasonic wave - Google Patents
Vehicle detector using ultrasonic waveInfo
- Publication number
- JPS5468200A JPS5468200A JP13549877A JP13549877A JPS5468200A JP S5468200 A JPS5468200 A JP S5468200A JP 13549877 A JP13549877 A JP 13549877A JP 13549877 A JP13549877 A JP 13549877A JP S5468200 A JPS5468200 A JP S5468200A
- Authority
- JP
- Japan
- Prior art keywords
- detector
- circuit
- output
- inputted
- constituted
- 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.)
- Granted
Links
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Traffic Control Systems (AREA)
Abstract
PURPOSE: To prevent chattering without deteriorating S/N by outputting vehicle detection signals when the output signal of a detector circuit is longer than a fixed time width and expanding the transmitted wave width of ultrasonic waves after outputting.
CONSTITUTION: This detector is constituted by ultrasonic wave transmitting and receiving head 1, amplifier 2 to amplify the ultrasonic wave received by head 1, detector 3 where the output of amplifier 2 is inputted, receiving wave width detector 4 where the output of detector 3 is inputted, vehicle decision circuit 5 where the output of detector 4 is inputted, ultrasonic transmitting wave width switching circuit 7 where the output of circuit 5 is inputted, oscillator 8 for driving head 1, gate 9 for the output of oscillator 8, and gate controller 11 which receives signals from circuit 7 and switches the length of the gate opening time. Here, a vehicle detector circuit is constituted by detector 4 and circuit 5, and a transmitting wave width control circuit is constituted by circuit 7 and controller 11.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13549877A JPS5468200A (en) | 1977-11-10 | 1977-11-10 | Vehicle detector using ultrasonic wave |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13549877A JPS5468200A (en) | 1977-11-10 | 1977-11-10 | Vehicle detector using ultrasonic wave |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5468200A true JPS5468200A (en) | 1979-06-01 |
JPS5637600B2 JPS5637600B2 (en) | 1981-09-01 |
Family
ID=15153140
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13549877A Granted JPS5468200A (en) | 1977-11-10 | 1977-11-10 | Vehicle detector using ultrasonic wave |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5468200A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62154999A (en) * | 1985-12-27 | 1987-07-09 | Oki Electric Ind Co Ltd | Ultrasonic transmitter-receiver |
-
1977
- 1977-11-10 JP JP13549877A patent/JPS5468200A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5637600B2 (en) | 1981-09-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS53140079A (en) | Automatic recognizing system for moving sound source | |
US4885588A (en) | Radar transponder | |
JPS5468200A (en) | Vehicle detector using ultrasonic wave | |
FR2313827A1 (en) | Binary elements train transmission system - has simple means of synchronising receiver timer, this timer having multiphase circuit | |
JPS5397714A (en) | Signal holding circuit | |
JPS6412285A (en) | Alarm transmitting method and apparatus for working vehicle | |
JPS56152396A (en) | Voice start control system by ear microphone | |
SE8700329D0 (en) | RADARANLEGGNING | |
EP0258874A3 (en) | An object detecting switch | |
JPS5451559A (en) | Mimic target | |
JPS5855775A (en) | Object detector | |
JPS5749857A (en) | Ultrasonic flaw-detecting device | |
JPS5521668A (en) | Tone detection system | |
JPS5734469A (en) | Automatic gain control device in ultrasonic pulse transmission | |
JPS5621481A (en) | Automatic gain control circuit | |
JPS5612631A (en) | Remote control unit of camera | |
JPS5460596A (en) | Ultrasonic vehicle sensor | |
JPS5576965A (en) | Acoustic device for fish detector | |
SU856022A2 (en) | Device for automatic monitoring of noise level in communication channels | |
JPS5692480A (en) | Radio wave transmitter | |
JPS53117925A (en) | Frequency control circuit | |
SU1480136A1 (en) | Radiorelay communication device | |
SU849073A1 (en) | Article quality control device | |
JPS5593330A (en) | Receiver | |
JPS568576A (en) | Radar device |