JPS5460596A - Ultrasonic vehicle sensor - Google Patents

Ultrasonic vehicle sensor

Info

Publication number
JPS5460596A
JPS5460596A JP12705677A JP12705677A JPS5460596A JP S5460596 A JPS5460596 A JP S5460596A JP 12705677 A JP12705677 A JP 12705677A JP 12705677 A JP12705677 A JP 12705677A JP S5460596 A JPS5460596 A JP S5460596A
Authority
JP
Japan
Prior art keywords
reception
signal
reflected wave
gate
wave
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
JP12705677A
Other languages
Japanese (ja)
Inventor
Koichi Yomogihara
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.)
Nippon Signal Co Ltd
Original Assignee
Nippon Signal Co 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 Nippon Signal Co Ltd filed Critical Nippon Signal Co Ltd
Priority to JP12705677A priority Critical patent/JPS5460596A/en
Publication of JPS5460596A publication Critical patent/JPS5460596A/en
Pending legal-status Critical Current

Links

Landscapes

  • Traffic Control Systems (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: To omit the transmission gate and thus to simplify the structure by transmitting the ultrasonic waves via the gate end signal of the reception reflected wave signal.
CONSTITUTION: The ultrasonic signals generated at ultrasonic signal generator circuit 3 are radiated through head 4. The reflected wave from the road surface or the vehicle is detected 6 via head 4 and amplifier 5, and the fall part of the reflected wave is differentiated (8) after waveform shaping 7 to control road surface reflected wave reception gate 9. Thus, the reception output of the reflected wave can be obtianed. In this case, gate signal generator circuit 1 generates the rectangular wave signal which has phase inversion with period T1 a little larger than the turnaround time of the sonic wave between the road surface and head 4 and at reflected wave reception time band T2. Then circuit 3 is driven by the differential output at the fall point of band T2 to transmit the ultrasonic waves. In this way, the transmission pulse is used for the differential output of the reception gate signal, and the reception signal is used for the fall differential output of the reflected pulse respectively. Thus, circuit 1 generates only the gate signal for the reception wave
COPYRIGHT: (C)1979,JPO&Japio
JP12705677A 1977-10-22 1977-10-22 Ultrasonic vehicle sensor Pending JPS5460596A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12705677A JPS5460596A (en) 1977-10-22 1977-10-22 Ultrasonic vehicle sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12705677A JPS5460596A (en) 1977-10-22 1977-10-22 Ultrasonic vehicle sensor

Publications (1)

Publication Number Publication Date
JPS5460596A true JPS5460596A (en) 1979-05-16

Family

ID=14950497

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12705677A Pending JPS5460596A (en) 1977-10-22 1977-10-22 Ultrasonic vehicle sensor

Country Status (1)

Country Link
JP (1) JPS5460596A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04123198A (en) * 1990-09-13 1992-04-23 Matsushita Electric Ind Co Ltd Vehicle sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04123198A (en) * 1990-09-13 1992-04-23 Matsushita Electric Ind Co Ltd Vehicle sensor

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