JPS6488282A - Ultrasonic switch - Google Patents

Ultrasonic switch

Info

Publication number
JPS6488282A
JPS6488282A JP24653087A JP24653087A JPS6488282A JP S6488282 A JPS6488282 A JP S6488282A JP 24653087 A JP24653087 A JP 24653087A JP 24653087 A JP24653087 A JP 24653087A JP S6488282 A JPS6488282 A JP S6488282A
Authority
JP
Japan
Prior art keywords
ultrasonic vibrator
transmission
circuit
reception
detected
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
JP24653087A
Other languages
Japanese (ja)
Inventor
Toshinobu Fujita
Hiroaki Furushima
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.)
Azbil Corp
Original Assignee
Azbil Corp
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 Azbil Corp filed Critical Azbil Corp
Priority to JP24653087A priority Critical patent/JPS6488282A/en
Publication of JPS6488282A publication Critical patent/JPS6488282A/en
Pending legal-status Critical Current

Links

Landscapes

  • Switches Operated By Changes In Physical Conditions (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To enable the detection of an object to be detected at a short distance, by driving a switching element at the time of the end of a transmission period of an ultrasonic vibrator, so as to damp reverberation vibrations of transmission waves caused by the ultrasonic vibrator. CONSTITUTION:An ultrasonic vibrator 1 driven by a drive circuit 2 oscillates an ultrasonic wave, while receiving a reflected wave from an object 3 to be detected. A transmission-reception switching circuit 7 switches over a reception circuit 4 and the drive circuit 2 periodically. A series circuit of a switching element 10 composed of a resistor having a relatively low resistance value and a transistor is connected in parallel with the ultrasonic vibrator 1, and it is driven by the transmission-reception switching circuit 7. The switching element 10 is driven at the time of the end of the transmission period of the ultrasonic vibrator 1, so as to damp the reverberation vibrations of transmission waves caused by the ultrasonic vibrator 1. Thereby reception waves are prevented from dissipating together with the reverberation vibrations of the transmission waves even when a distance to the object 3 to be detected is short.
JP24653087A 1987-09-30 1987-09-30 Ultrasonic switch Pending JPS6488282A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24653087A JPS6488282A (en) 1987-09-30 1987-09-30 Ultrasonic switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24653087A JPS6488282A (en) 1987-09-30 1987-09-30 Ultrasonic switch

Publications (1)

Publication Number Publication Date
JPS6488282A true JPS6488282A (en) 1989-04-03

Family

ID=17149778

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24653087A Pending JPS6488282A (en) 1987-09-30 1987-09-30 Ultrasonic switch

Country Status (1)

Country Link
JP (1) JPS6488282A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7228220B2 (en) * 2002-11-02 2007-06-05 Robert Bosch Gmbh Device for adaptive distance and speed control with having torque dampening
WO2010012845A1 (en) 2008-08-01 2010-02-04 Natraceutical, S.A. Obtainment of cocoa extracts rich in bioactive peptides with inhibiting activity of ace and pep enzymes
JP2017508962A (en) * 2014-04-11 2017-03-30 エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ Proximity sensing system and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7228220B2 (en) * 2002-11-02 2007-06-05 Robert Bosch Gmbh Device for adaptive distance and speed control with having torque dampening
WO2010012845A1 (en) 2008-08-01 2010-02-04 Natraceutical, S.A. Obtainment of cocoa extracts rich in bioactive peptides with inhibiting activity of ace and pep enzymes
JP2017508962A (en) * 2014-04-11 2017-03-30 エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ Proximity sensing system and method
US10852130B2 (en) 2014-04-11 2020-12-01 SZ DJI Technology Co., Ltd. Proximity sensing systems and methods

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