JPH01151389U - - Google Patents
Info
- Publication number
- JPH01151389U JPH01151389U JP4786188U JP4786188U JPH01151389U JP H01151389 U JPH01151389 U JP H01151389U JP 4786188 U JP4786188 U JP 4786188U JP 4786188 U JP4786188 U JP 4786188U JP H01151389 U JPH01151389 U JP H01151389U
- Authority
- JP
- Japan
- Prior art keywords
- oscillation
- stopping
- signal
- receiver
- restarting
- 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
Links
- 230000010355 oscillation Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 4
- 230000005856 abnormality Effects 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Burglar Alarm Systems (AREA)
Description
第１図は本考案一実施例の回路図、第２図は同
上の動作説明図である。
１は発振器、２は送波器、３は受波器、４は信
号処理回路、９は警報手段である。
FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the same operation. 1 is an oscillator, 2 is a transmitter, 3 is a receiver, 4 is a signal processing circuit, and 9 is an alarm means.
補正 昭６３．６．３
実用新案登録請求の範囲を次のように補正する
。Amendment June 3, 1986 The scope of claims for utility model registration is amended as follows.
【実用新案登録請求の範囲】
送波用発振器にて駆動される送波器にてマイク
ロ波、超音波などを検知エリアに連続的に送波し
、検知エリア内の検知物体にて反射された反射波
を受波器にて受波し、信号処理回路にて受波信号
の送波信号に対する周波数偏移に基いて検知物体
の移動を検出するようにしたドツプラ方式の防犯
センサにおいて、送波用発振器の発振を一時的に
停止させる発振停止手段と、発振停止時点および
発振再開時点における送波器から受波器へのまわ
りこみ信号の周波数偏移およびそのレベルを検出
することにより送受波器の動作をチエツクする動
作チエツク手段を設け、発振停止および発振再開
時点に周波数偏移が検出されなかつたとき異常報
知手段を動作させるようにしたことを特徴とする
防犯センサ。[Scope of claim for utility model registration] Microwaves, ultrasonic waves, etc. are continuously transmitted to a detection area by a transmitter driven by a wave oscillator, and the waves are reflected by a sensing object within the detection area. In a Doppler type security sensor, a reflected wave is received by a receiver, and a signal processing circuit detects the movement of a sensing object based on the frequency deviation of the received signal with respect to the transmitted signal. oscillation stop means for temporarily stopping the oscillation of the transducer, and detecting the frequency shift and level of the wrap-around signal from the transmitter to the receiver at the point of stopping oscillation and the point of restarting oscillation. A crime prevention sensor characterized in that an operation check means is provided to check the operation, and when no frequency shift is detected at the time of stopping oscillation and restarting oscillation, an abnormality notification means is operated.
Claims (1)
ロ波、超音波などを検知エリアに連続的に送波し
、検知エリア内の検知物体にて反射された反射波
を受波器にて受波し、信号処理回路にて受波信号
の送波信号に対する周波数偏移に基いて検知物体
の移動を検出するようにしたドツプラ方式の防犯
センサにおいて、送波用発振器の発振を一時的に
停止させる発振停止手段と、発振停止時点および
発振再開時点における送波器から受波器へのまわ
りこみ信号の周波数偏移を検出することにより送
受波器の動作をチエツクする動作チエツク手段を
設け、発振停止および発振再開時点に周波数偏移
が検出されなかつたとき異常報知手段を動作させ
るようにしたことを特徴とする防犯センサ。 A transmitter driven by a transmitting oscillator continuously transmits microwaves, ultrasonic waves, etc. to the detection area, and the reflected waves from the sensing object within the detection area are received by the receiver. In a Doppler security sensor that receives a wave and uses a signal processing circuit to detect the movement of a sensing object based on the frequency deviation of the received signal with respect to the transmitted signal, the oscillation of the transmitting oscillator is temporarily suppressed. An oscillation stop means for stopping the oscillation, and an operation check means for checking the operation of the transducer by detecting the frequency deviation of the wrap-around signal from the transmitter to the receiver at the point of stopping the oscillation and the point of restarting the oscillation are provided. A crime prevention sensor characterized in that an abnormality notification means is operated when no frequency shift is detected at the time of stopping and restarting oscillation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4786188U JPH01151389U (en) | 1988-04-08 | 1988-04-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4786188U JPH01151389U (en) | 1988-04-08 | 1988-04-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01151389U true JPH01151389U (en) | 1989-10-19 |
Family
ID=31274038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4786188U Pending JPH01151389U (en) | 1988-04-08 | 1988-04-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01151389U (en) |
-
1988
- 1988-04-08 JP JP4786188U patent/JPH01151389U/ja active Pending
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