JPH0226824B2 - - Google Patents

Info

Publication number
JPH0226824B2
JPH0226824B2 JP56083664A JP8366481A JPH0226824B2 JP H0226824 B2 JPH0226824 B2 JP H0226824B2 JP 56083664 A JP56083664 A JP 56083664A JP 8366481 A JP8366481 A JP 8366481A JP H0226824 B2 JPH0226824 B2 JP H0226824B2
Authority
JP
Japan
Prior art keywords
ultrasonic
waves
circuit
comparator
output
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.)
Expired - Lifetime
Application number
JP56083664A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57197926A (en
Inventor
Takeshi Kuryama
Takashi Ikehara
Akira Kurita
Takashi Myahara
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP8366481A priority Critical patent/JPS57197926A/ja
Publication of JPS57197926A publication Critical patent/JPS57197926A/ja
Publication of JPH0226824B2 publication Critical patent/JPH0226824B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches

Landscapes

  • Electronic Switches (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Burglar Alarm Systems (AREA)
JP8366481A 1981-05-30 1981-05-30 Ultrasonic sense switch device Granted JPS57197926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8366481A JPS57197926A (en) 1981-05-30 1981-05-30 Ultrasonic sense switch device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8366481A JPS57197926A (en) 1981-05-30 1981-05-30 Ultrasonic sense switch device

Publications (2)

Publication Number Publication Date
JPS57197926A JPS57197926A (en) 1982-12-04
JPH0226824B2 true JPH0226824B2 (enExample) 1990-06-13

Family

ID=13808720

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8366481A Granted JPS57197926A (en) 1981-05-30 1981-05-30 Ultrasonic sense switch device

Country Status (1)

Country Link
JP (1) JPS57197926A (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120026029A1 (en) * 2009-02-11 2012-02-02 Koninklijke Philips Electronics N.V. Motion detection system and method with null points

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52152146A (en) * 1976-06-14 1977-12-17 Matsushita Electric Works Ltd Multistage amplifier circuit
US4261843A (en) * 1979-06-28 1981-04-14 Chevron Research Company Reaction product of acidic molybdenum compound with basic nitrogen compound and lubricants containing same

Also Published As

Publication number Publication date
JPS57197926A (en) 1982-12-04

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