JPS56794A - Ultrasonic wave switch - Google Patents

Ultrasonic wave switch

Info

Publication number
JPS56794A
JPS56794A JP7594079A JP7594079A JPS56794A JP S56794 A JPS56794 A JP S56794A JP 7594079 A JP7594079 A JP 7594079A JP 7594079 A JP7594079 A JP 7594079A JP S56794 A JPS56794 A JP S56794A
Authority
JP
Japan
Prior art keywords
directivity
transceiver
ambient temperature
change
oscillation frequency
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
Application number
JP7594079A
Other languages
Japanese (ja)
Other versions
JPS5856445B2 (en
Inventor
Mineo Okamoto
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP7594079A priority Critical patent/JPS5856445B2/en
Publication of JPS56794A publication Critical patent/JPS56794A/en
Publication of JPS5856445B2 publication Critical patent/JPS5856445B2/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/0207—Driving circuits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
    • B06B2201/40—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups with testing, calibrating, safety devices, built-in protection, construction details

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

PURPOSE:To enable to restrict the change in the directivity of the transceiver having trumpet horn, by changing the oscillated frequency of ultrasonic waves according to ambient temperature. CONSTITUTION:According to the ambient temperature, the directivity of the transceiver 3 having the cone of trumpet is changed. Negative characteristics thermister is used at a part of the resistor for time constant setting the oscillation frequency in the oscillator 4 provided for the transmitting circuit A, and the oscillation frequency is automatically changed according to the variation in the ambient temperature. That is, to prevent the change in the directivity of transceiver 3 due to ambient temperature, the oscillation frequency of ultrasonic waves is changed, allowing to keep the directivity of the transceiver 3 at almost constant. Thus, the change in the directivity can be suppressed.
JP7594079A 1979-06-15 1979-06-15 ultrasonic switch Expired JPS5856445B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7594079A JPS5856445B2 (en) 1979-06-15 1979-06-15 ultrasonic switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7594079A JPS5856445B2 (en) 1979-06-15 1979-06-15 ultrasonic switch

Publications (2)

Publication Number Publication Date
JPS56794A true JPS56794A (en) 1981-01-07
JPS5856445B2 JPS5856445B2 (en) 1983-12-15

Family

ID=13590729

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7594079A Expired JPS5856445B2 (en) 1979-06-15 1979-06-15 ultrasonic switch

Country Status (1)

Country Link
JP (1) JPS5856445B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005083464A1 (en) * 2004-02-27 2005-09-09 Technische Universität Wien Method and sensor device for detecting information on the position of an object by means of an ultrasound sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005083464A1 (en) * 2004-02-27 2005-09-09 Technische Universität Wien Method and sensor device for detecting information on the position of an object by means of an ultrasound sensor

Also Published As

Publication number Publication date
JPS5856445B2 (en) 1983-12-15

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