JPH0339190U - - Google Patents

Info

Publication number
JPH0339190U
JPH0339190U JP9999189U JP9999189U JPH0339190U JP H0339190 U JPH0339190 U JP H0339190U JP 9999189 U JP9999189 U JP 9999189U JP 9999189 U JP9999189 U JP 9999189U JP H0339190 U JPH0339190 U JP H0339190U
Authority
JP
Japan
Prior art keywords
detecting
crime prevention
ultrasonic waves
monitoring space
state
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
JP9999189U
Other languages
English (en)
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 filed Critical
Priority to JP9999189U priority Critical patent/JPH0339190U/ja
Publication of JPH0339190U publication Critical patent/JPH0339190U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Burglar Alarm Systems (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Description

【図面の簡単な説明】
第１図は本考案の一実施例を示すブロツク図、
第２図は同上の送波駆動部の回路図である。 １……送波駆動部、２……送波器、３……受波
器、４……受波信号処理部、５……制御部である
。

Claims (1)

    【実用新案登録請求の範囲】
  1. 発振器から出力される送波信号により駆動され
    て監視空間に超音波を送波する送波器と、前記監
    視空間内に存在する物体からの反射波を受波する
    受波器と、前記物体が移動したときにドツプラー
    効果によつて受波信号に生じる周波数偏移成分を
    検出して、侵入物体を検知する信号処理手段とか
    らなる防犯警戒器において、警戒状態と非警戒状
    態との動作モードの切換機能を有し、非警戒状態
    では超音波の送波を停止させる手段を備えたこと
    を特徴とする防犯警戒器。
JP9999189U 1989-08-28 1989-08-28 Pending JPH0339190U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9999189U JPH0339190U (ja) 1989-08-28 1989-08-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9999189U JPH0339190U (ja) 1989-08-28 1989-08-28

Publications (1)

Publication Number Publication Date
JPH0339190U true JPH0339190U (ja) 1991-04-16

Family

ID=31649016

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9999189U Pending JPH0339190U (ja) 1989-08-28 1989-08-28

Country Status (1)

Country Link
JP (1) JPH0339190U (ja)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5426698A (en) * 1977-07-30 1979-02-28 Matsushita Electric Works Ltd Alarm unit using ultrasonic waves
JPS5532179A (en) * 1978-08-28 1980-03-06 Sharp Kk Device for detecting intercepting member
JPS62147382A (ja) * 1985-12-23 1987-07-01 Matsushita Electric Works Ltd 移動物体検知装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5426698A (en) * 1977-07-30 1979-02-28 Matsushita Electric Works Ltd Alarm unit using ultrasonic waves
JPS5532179A (en) * 1978-08-28 1980-03-06 Sharp Kk Device for detecting intercepting member
JPS62147382A (ja) * 1985-12-23 1987-07-01 Matsushita Electric Works Ltd 移動物体検知装置

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