JPS5830633B2 - Vibration detector for security alarm - Google Patents
Vibration detector for security alarmInfo
- Publication number
- JPS5830633B2 JPS5830633B2 JP891276A JP891276A JPS5830633B2 JP S5830633 B2 JPS5830633 B2 JP S5830633B2 JP 891276 A JP891276 A JP 891276A JP 891276 A JP891276 A JP 891276A JP S5830633 B2 JPS5830633 B2 JP S5830633B2
- Authority
- JP
- Japan
- Prior art keywords
- vibration
- diaphragm
- case
- conversion element
- signal conversion
- 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
Links
- 238000006243 chemical reaction Methods 0.000 claims description 11
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 description 3
- 235000011006 sodium potassium tartrate Nutrition 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 210000004905 finger nail Anatomy 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Burglar Alarm Systems (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
Description
【発明の詳細な説明】
この発明は、物体に加えられたわずかな衝撃や音波等に
よる極めて微弱な振動をも検知できるようにした時相警
報器用のセンサーとして最適な振動検知器に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration detector that is suitable as a sensor for a time phase alarm and is capable of detecting even the slightest shock applied to an object or extremely weak vibrations caused by sound waves or the like.
従来、防札警報用の振動スイッチとして接点式の振動ス
イッチが存在している。Conventionally, a contact type vibration switch has been used as a vibration switch for a security alarm.
しかし、この種のものは接点式であるために接点作動の
ためには成る程度の大きさの機械振動が必要であり、極
めて微弱な振動や、音波等の振動を検知することができ
ない。However, since this type of device is a contact type, a certain amount of mechanical vibration is required for the contact to operate, and extremely weak vibrations or vibrations such as sound waves cannot be detected.
この発明の目的は、振動−電気信号変換素子を使用し、
無接点式の振動スイッチを構成することによって、従来
のものと違って極めて微弱な衝撃・音波振動をも十分に
検知することができる防札警報用振動検知器を提供する
ことである。The purpose of this invention is to use a vibration-electric signal conversion element,
To provide a vibration detector for a security tag alarm, which is capable of sufficiently detecting extremely weak shocks and sonic vibrations, unlike conventional ones, by configuring a non-contact type vibration switch.
以下、この発明の一実施例を図面にもとづいて詳細に説
明する。Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.
図面は、この発明の一実施例を示すもので、第１図は平
面図、第２図は第１図■−■線に沿う縦断側面図である
。The drawings show one embodiment of the present invention, and FIG. 1 is a plan view, and FIG. 2 is a longitudinal cross-sectional side view taken along line 1--2 in FIG. 1.
第１２図において、符号１はケースであって、このケー
ス１内に振動板２、振動−電気信号変換素子３を固定し
た弾性体よりなる素子保護板７、抵抗４などが収納され
ている。In FIG. 12, reference numeral 1 denotes a case, and the case 1 houses a diaphragm 2, an element protection plate 7 made of an elastic body to which a vibration-electric signal conversion element 3 is fixed, a resistor 4, and the like.
振動板２はその基部が弾力性のある固定部材５によりケ
ース１内に振動し易いように支持され、その中間部に折
曲形成された突部６ａがケース１の開口部６より外部に
所定量だけ突出されている。The base of the diaphragm 2 is supported by an elastic fixing member 5 so that it can easily vibrate inside the case 1, and a protrusion 6a formed by bending in the middle part is placed outside from the opening 6 of the case 1. Only a quantitative amount stands out.
この振動板２は、例えば振動を吸収、消耗しない弾力性
のある金属板で細長い短冊形に形成されている。The diaphragm 2 is, for example, an elastic metal plate that absorbs vibrations and does not wear out, and is formed into an elongated rectangular shape.
振動−電気信号変換素子３は素子保護板７０表面にＵ字
形に接着固定または該素子保護板の表面に面一に埋設固
定されている。The vibration-electrical signal conversion element 3 is adhesively fixed in a U-shape to the surface of the element protection plate 70 or embedded and fixed flush with the surface of the element protection plate.
前記保護板７はその一端隅部が固定部材８によりケース
１内に固定され、その先端部は上記振動板２の先端コ字
形折曲部２ａで挾持されて、振動板２の振動がそのまま
伝達されて曲折し保持する素子３を歪曲するようになっ
ている。One end corner of the protection plate 7 is fixed in the case 1 by a fixing member 8, and its tip is held by the U-shaped bent portion 2a at the tip of the diaphragm 2, so that the vibration of the diaphragm 2 is directly transmitted. The element 3 which is bent and held is distorted by the bending.
すなわち、前記振動−電気信号変換素子３の感度は、素
子が歪曲しながら左右に揺れる動作状態の時が最大であ
ることから上記のような固定方法を採用したものである
。That is, since the sensitivity of the vibration-electrical signal converting element 3 is at its maximum when the element is in an operating state in which it is distorted and swings from side to side, the fixing method described above is adopted.
そして、前記振動−電気信号変換素子３は、例えばロッ
シェル塩等を基礎とした圧電率の高い圧電素子により形
成される。The vibration-electric signal conversion element 3 is formed of a piezoelectric element with a high piezoelectric constant based on, for example, Rochelle salt.
そして、前記振動−電気信号変換素子３０両端面にはそ
れぞれリード線９１０が接続され、出力端子ａｂを通じ
て警報用受信機１１の増幅段から出力信号が取出される
ようになっている。Lead wires 910 are connected to both end faces of the vibration-electrical signal conversion element 30, respectively, so that an output signal is taken out from the amplification stage of the alarm receiver 11 through the output terminal ab.
符号４の抵抗は出力端子間に接続された出力電圧を取出
すためのものである。A resistor 4 is for taking out the output voltage connected between the output terminals.
つぎに、このように構成された検知器のケース１の前面
１３には、例えば適当な厚さの両面テープ１４が貼着さ
れて、任意の被検知部１５に検知器を貼着して取付ける
ことができるようになっている。Next, double-sided tape 14 of an appropriate thickness is pasted, for example, on the front surface 13 of the case 1 of the detector configured in this way, and the detector is pasted and attached to any detected part 15. It is now possible to do so.
従って、前記振動板２の突部６ａは第２図鎖線示のよう
にこの両面テープ１４０表面よりも適当に突出していて
、検知器を被検知面１５に取付けたとき該被検知面に当
接してケース１内に押込まれて実線示のようになる。Therefore, the protrusion 6a of the diaphragm 2 appropriately protrudes from the surface of the double-sided tape 140, as shown by the chain line in FIG. is pushed into the case 1 as shown by the solid line.
つまり、振動板２の突部６ａが強く被検知面に当接し、
被検知面に生ずる小さな振動もロスなく有効に振動板２
に伝達されるようになる。In other words, the protrusion 6a of the diaphragm 2 strongly contacts the detected surface,
The diaphragm 2 can effectively handle small vibrations generated on the detection surface without any loss.
It will be transmitted to
従って、今例えば被検知部１５が床面であるとすると、
人が歩くことにより被検知部が振動し、この振動は直接
振動板２に伝達されて該振動板を振動させ、この振動板
２の振動により素子保護板７を固定部材８を支点に折曲
し、これによって振動−電気信号変換素子３を押圧して
ひずませる。Therefore, for example, if the detected part 15 is the floor surface,
When a person walks, the detected part vibrates, and this vibration is directly transmitted to the diaphragm 2, vibrating the diaphragm, and the vibration of the diaphragm 2 causes the element protection plate 7 to bend around the fixing member 8. As a result, the vibration-electric signal conversion element 3 is pressed and distorted.
すると、この振動−電気信号変換素子３には電気分極に
よって圧力に比例した電荷が生じ、抵抗４を通して所定
の電気信号として供給され、例えば時相用警報装置とし
て受信機を作動させることができる。Then, a charge proportional to the pressure is generated in the vibration-electrical signal conversion element 3 due to electrical polarization, and is supplied as a predetermined electrical signal through the resistor 4, which can operate a receiver as a time phase alarm device, for example.
上述したように、この発明によれば、被検知部のいかな
る微弱な振動も振動板を介してケース内の空間に支持さ
れた振動−電気信号変換素子に伝えられる。As described above, according to the present invention, any weak vibration of the detected part is transmitted via the diaphragm to the vibration-electrical signal conversion element supported in the space within the case.
しかも、振動−電気信号変換素子は、極めて圧電率の高
いロッシェル塩等により形成されているので極めて小さ
い圧力の変化も容易に検知して、電気信号に変換するこ
とができる。Furthermore, since the vibration-electrical signal converting element is made of Rochelle salt or the like having extremely high piezoelectricity, it can easily detect extremely small changes in pressure and convert them into electrical signals.
例えば、音波、小さな針、人間の爪、ドライバー等の先
端のわずかな接触、ガラス切り、火災による焼き切り等
を極めて静かに行ってもこれらによる振動を細大もらさ
ずキャッチすることができる。For example, vibrations caused by sound waves, small needles, human fingernails, the slightest contact with the tip of a screwdriver, cutting glass, burning due to fire, etc., can be detected in their entirety even when the process is performed very quietly.
しかも、敏感な性能にも拘らず設置面のみの異常を的確
にキャッチして、外部の雑音は全く受付けないので誤動
作の恐れはなく時相用警報器のセンサーとして最適をも
のである。Moreover, despite its sensitive performance, it accurately detects abnormalities only on the installation surface and does not accept any external noise, so there is no risk of malfunction, making it ideal as a sensor for time phase alarms.
なお、前記実施例においては、振動−電気信号変換素子
としてロッシェル塩を使用したが、その他チタン酸バリ
ウム等圧電効果の高い圧電素子の使用が可能であること
はいうまでもない。In the above embodiment, Rochelle salt was used as the vibration-electrical signal conversion element, but it goes without saying that other piezoelectric elements having a high piezoelectric effect, such as barium titanate, can be used.
第１図は、この発明の一実施例の開蓋状態の平面図、第
２図は、同中央縦断側面図である。
１・・・・・・ケース、２・・・・・・振動板、３・・
・・・・振動−電気信号変換素子、４・・・・・・抵抗
、６・・・・・・ケース開口部、６ａ・・・・・・突部
、８・・・・・・固定部、１１・・・・・・警報用受信
機。FIG. 1 is a plan view of an embodiment of the present invention in an open state, and FIG. 2 is a longitudinal sectional side view of the same. 1...Case, 2...Diaphragm, 3...
... Vibration-electrical signal conversion element, 4 ... Resistor, 6 ... Case opening, 6a ... Protrusion, 8 ... Fixed part , 11... Alarm receiver.
Claims (1)
板の振動を受けてその振動を電気信号に変換する振動−
電気信号変換素子とをケース内に収納するとともに、前
記振動板の一部を前記ケース外部に突出させて前記被検
知部に当接させるようにしたことを特徴とする防札警報
用振動検知器。1. A diaphragm that vibrates due to the vibration of the detected part, and a vibration that receives the vibration of this diaphragm and converts the vibration into an electrical signal.
An electric signal conversion element is housed in a case, and a part of the diaphragm protrudes outside the case and comes into contact with the detected part. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP891276A JPS5830633B2 (en) | 1976-01-29 | 1976-01-29 | Vibration detector for security alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP891276A JPS5830633B2 (en) | 1976-01-29 | 1976-01-29 | Vibration detector for security alarm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5292499A JPS5292499A (en) | 1977-08-03 |
| JPS5830633B2 true JPS5830633B2 (en) | 1983-06-30 |
Family
ID=11705862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP891276A Expired JPS5830633B2 (en) | 1976-01-29 | 1976-01-29 | Vibration detector for security alarm |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5830633B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4538140A (en) * | 1982-03-31 | 1985-08-27 | Gould Inc. | Fiber optic acoustic transducer intrusion detection system |
| JPH0280892U (en) * | 1988-12-07 | 1990-06-21 |
-
1976
- 1976-01-29 JP JP891276A patent/JPS5830633B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5292499A (en) | 1977-08-03 |
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