JPH0446963U - - Google Patents
Info
- Publication number
- JPH0446963U JPH0446963U JP8879290U JP8879290U JPH0446963U JP H0446963 U JPH0446963 U JP H0446963U JP 8879290 U JP8879290 U JP 8879290U JP 8879290 U JP8879290 U JP 8879290U JP H0446963 U JPH0446963 U JP H0446963U
- Authority
- JP
- Japan
- Prior art keywords
- pressure level
- sound pressure
- vehicle interior
- sound
- difference
- 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
- 230000002265 prevention Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Burglar Alarm Systems (AREA)
Description
第１図は本考案の実施例に係わる盗難防止警報
装置を装着した車両の側面図である。第２図は同
盗難防止警報装置の制御内容を示すブロツク図で
ある。第３図は車室内における気柱共振を示す側
面説明図である。第４図は同盗難防止警報装置の
フローチヤートである。
主要な部分の符号の説明、１Ａ……車室、２…
…スピーカ（音波発生装置）、３……定在波、４
……音圧レベル検出手段、６……音圧レベル差判
断手段、７……記憶手段、８……警報手段。
FIG. 1 is a side view of a vehicle equipped with an anti-theft alarm device according to an embodiment of the present invention. FIG. 2 is a block diagram showing the control details of the theft prevention alarm device. FIG. 3 is an explanatory side view showing air column resonance in the vehicle interior. FIG. 4 is a flowchart of the theft prevention alarm device. Explanation of symbols of main parts, 1A...Car interior, 2...
...Speaker (sound wave generator), 3...Standing wave, 4
... Sound pressure level detection means, 6 ... Sound pressure level difference judgment means, 7 ... Storage means, 8 ... Alarm means.
Claims (1)
発振して車室が閉じた状態のとき車室内に定在波
を形成する音波発生装置と、車室内に設けられ音
波発生装置からの音波の音圧レベルを検出する音
圧レベル検出手段と、車室が閉じた状態のとき車
室内の定在波の固有の音圧レベルを記憶する記憶
手段と、音圧レベル検出手段により検出された音
波の音圧レベルと車室が閉じた状態のときの車室
内の定在波の固有の音圧レベルとの差を計算し、
その差が所定の差以上のとき車室の一部が開状態
にあると判断して警報手段を駆動させる音圧レベ
ル差判断手段とを備えていることを特徴とする盗
難防止警報装置。 (2) 音圧レベル検出手段は定在波の腹の部分に
設けられていることを特徴とする請求項１記載の
盗難防止警報装置。[Scope of Claim for Utility Model Registration] (1) A sound wave generator installed in a vehicle interior that oscillates a sound wave of a predetermined frequency to form a standing wave in the vehicle interior when the vehicle interior is closed; a sound pressure level detection means for detecting the sound pressure level of the sound wave from the sound wave generator, and a storage means for storing the unique sound pressure level of the standing waves in the vehicle interior when the vehicle interior is in a closed state; Calculating the difference between the sound pressure level of the sound wave detected by the sound pressure level detection means and the unique sound pressure level of the standing wave inside the passenger compartment when the passenger compartment is closed,
An anti-theft alarm device comprising sound pressure level difference determining means for determining that a part of the vehicle interior is in an open state and driving an alarm means when the difference is greater than a predetermined difference. (2) The anti-theft alarm device according to claim 1, wherein the sound pressure level detection means is provided at the antinode of the standing wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8879290U JPH0446963U (en) | 1990-08-24 | 1990-08-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8879290U JPH0446963U (en) | 1990-08-24 | 1990-08-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0446963U true JPH0446963U (en) | 1992-04-21 |
Family
ID=31822325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8879290U Pending JPH0446963U (en) | 1990-08-24 | 1990-08-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0446963U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013221901A (en) * | 2012-04-18 | 2013-10-28 | Mazda Motor Corp | Vehicle intrusion detection device |
-
1990
- 1990-08-24 JP JP8879290U patent/JPH0446963U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013221901A (en) * | 2012-04-18 | 2013-10-28 | Mazda Motor Corp | Vehicle intrusion detection device |
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