JPH01135589U - - Google Patents
Info
- Publication number
- JPH01135589U JPH01135589U JP3000788U JP3000788U JPH01135589U JP H01135589 U JPH01135589 U JP H01135589U JP 3000788 U JP3000788 U JP 3000788U JP 3000788 U JP3000788 U JP 3000788U JP H01135589 U JPH01135589 U JP H01135589U
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic
- vehicle
- regular intervals
- reflected
- receives
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Burglar Alarm Systems (AREA)
- Emergency Alarm Devices (AREA)
- Transducers For Ultrasonic Waves (AREA)
Description
第１図は本考案の超音波式車両用盗難防止器の
一実施例によるブロツクダイヤグラムを示す図、
第２図は発振器から一定間隔で出てくるバースト
状の超音波信号を示す図、第３図は受信用超音波
マイクロホンで受信した受信波形を示す図、第４
図は検波回路を通したパルス状包絡線に対応した
パルス状波形を示す図、第５図は正常時および異
常時における判定値（率）の温度変化による推移
のグラフである。
１ａ……送信用超音波マイクロホン、１ｂ……
受信用超音波マイクロホン、２……基準信号発生
器、３……発振器、４……増幅回路、５……検波
回路、６……サンプルホールド回路、７……Ａ／
Ｄ変換回路、８……記憶回路、９……積分回路、
１０……温度検出素子、１１……変換回路、１２
……マイクロコンピユータ。
FIG. 1 is a diagram showing a block diagram of an embodiment of the ultrasonic vehicle anti-theft device of the present invention;
Figure 2 is a diagram showing burst-shaped ultrasonic signals emitted from the oscillator at regular intervals, Figure 3 is a diagram showing the received waveform received by the receiving ultrasonic microphone, and Figure 4 is a diagram showing the received waveform received by the receiving ultrasonic microphone.
The figure shows a pulse waveform corresponding to the pulse envelope passed through the detection circuit, and FIG. 5 is a graph of the transition of the determination value (ratio) due to temperature change in normal and abnormal conditions. 1a... Ultrasonic microphone for transmission, 1b...
Receiving ultrasonic microphone, 2... Reference signal generator, 3... Oscillator, 4... Amplification circuit, 5... Detection circuit, 6... Sample hold circuit, 7... A/
D conversion circuit, 8...memory circuit, 9...integrator circuit,
10... Temperature detection element, 11... Conversion circuit, 12
...Microcomputer.
Claims (1)
定間隔でパルス状超音波を放射してその反射波を
超音波マイクロホンで受信し、この反射波形を基
準パターンとして記憶し、一定間隔で受信する新
な反射波と比較判定するに当り、車両室内の温度
により判定基準を推移させて検知信号を出力する
ように構成した超音波式車両用盗難防止器。 A new type of reflected wave that emits pulsed ultrasonic waves at regular intervals from an ultrasonic microphone installed in the vehicle interior, receives the reflected waves with the ultrasonic microphone, stores this reflected waveform as a reference pattern, and receives it at regular intervals. An ultrasonic anti-theft device for a vehicle configured to output a detection signal by changing the determination criteria depending on the temperature inside the vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3000788U JPH01135589U (en) | 1988-03-07 | 1988-03-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3000788U JPH01135589U (en) | 1988-03-07 | 1988-03-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01135589U true JPH01135589U (en) | 1989-09-18 |
Family
ID=31254685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3000788U Pending JPH01135589U (en) | 1988-03-07 | 1988-03-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01135589U (en) |
-
1988
- 1988-03-07 JP JP3000788U patent/JPH01135589U/ja active Pending
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