DE3249866C2 - Acoustic-electrical transducer for monitoring armoured rooms (spaces) - Google Patents
Acoustic-electrical transducer for monitoring armoured rooms (spaces)Info
- Publication number
- DE3249866C2 DE3249866C2 DE19823249866 DE3249866A DE3249866C2 DE 3249866 C2 DE3249866 C2 DE 3249866C2 DE 19823249866 DE19823249866 DE 19823249866 DE 3249866 A DE3249866 A DE 3249866A DE 3249866 C2 DE3249866 C2 DE 3249866C2
- Authority
- DE
- Germany
- Prior art keywords
- acoustic
- electrical
- sleeve
- electrical transducer
- monitoring
- 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
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
- G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
- G08B13/1672—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using sonic detecting means, e.g. a microphone operating in the audio frequency range
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05G—SAFES OR STRONG-ROOMS FOR VALUABLES; BANK PROTECTION DEVICES; SAFETY TRANSACTION PARTITIONS
- E05G1/00—Safes or strong-rooms for valuables
- E05G1/10—Safes or strong-rooms for valuables with alarm, signal or indicator
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Description
Die Erfindung betrifft einen akustisch-elektrischen Wandler zum Überwachen von gepanzerten Räumen nach dem Oberbegriff des Hauptanspruchs, wie er aus der DE-AS 27 21 880 bekannt ist.The invention relates to an acoustic-electrical Transducer for monitoring armored rooms after the Preamble of the main claim as it is from DE-AS 27 21 880 is known.
Bei akustisch-elektrischen Wandlern zur Überwachung von gepanzerten Räumen ist die Empfindlichkeit des piezo elektrischen Elements von entscheidender Bedeutung, da bei einer hohen Empfindlichkeit die elektrische Signal verstärkung in der Auswerteschaltung der Vorrichtung geringer sein kann, was einen größeren elektrischen Störabstand bedeutet.With acoustic-electrical transducers for monitoring armored spaces is the sensitivity of the piezo electrical element vital since at high sensitivity the electrical signal amplification in the evaluation circuit of the device may be less, which is a larger electrical S / N ratio means.
Der Erfindung liegt die Aufgabe zugrunde, einen aku stisch-elektrischen Wandler der eingangs genannten Art mit einer erhöhten Empfindlichkeit zu schaffen.The invention has for its object an aku table-electrical converter of the type mentioned to create with increased sensitivity.
Erfindungsgemäß wird diese Aufgabe durch die im kenn zeichnenden Teil des Hauptanspruchs angegebenen Merk male gelöst. Die Unteransprüche geben vorteilhafte Ausgestaltungen des vorgeschlagenen Wandlers an.According to the invention, this object is achieved by the drawing part of the main claim specified Merk times solved. The subclaims give advantageous Refinements of the proposed converter.
Weitere Merkmale und Vorteile dieses Wandlers ergeben sich aus der Beschreibung, in der ein Ausführungsbei spiel anhand einer Zeichnung erläutert wird.Additional features and advantages of this converter result derive from the description in which an execution example game is explained using a drawing.
Dabei zeigt die einzige Figur einen solchen Wandler in einer Schnittansicht.The only figure shows such a converter in one Sectional view.
Der Wandler weist eine mit einem Gewindebolzen 61 ver sehene Schallaufnahmehülse 60 aus Stahl auf, welche auf einer nicht gezeigten Grundplatte aus Stahl, die einen Teil eines zweiteiligen Gehäuses einer Vorrichtung zum Überwachen von gepanzerten Räumen bildet, mittels des Gewindebolzens 61 befestigt ist. Auf der Grundplatte ist eine Isolierplatte aus Glasepoxyd aufgeklebt, mit tels welcher die Grundplatte auf dem zu überwachenden Bauwerk aufliegt und mit zwei Bolzen auf diesem befe stigt ist.The transducer has a ver provided with a threaded bolt 61 sound absorption sleeve 60 made of steel, which is fastened on a steel base plate, not shown, which forms part of a two-part housing of a device for monitoring armored spaces, by means of the threaded bolt 61 . On the base plate, an insulating plate made of glass epoxy is glued, by means of which the base plate rests on the structure to be monitored and is fastened with two bolts on it.
In der Schallaufnahmehülse 60 sind ein Isolierrohr 62 und ein piezoelektrisches Element 63, z. B. aus Keramik angeordnet. Auf dem piezoelektrischen Ele ment 63 ist eine Messingscheibe 64 montiert. Zwischen einem Anschlußplättchen 66 und der Messingscheibe 64 befindet sich eine Feder 65. Die Wirkung der Feder 65 und der Messingscheibe 64 ist, daß der piezoelektri sche Effekt verstärkt wird. Die Verstärkung des piezo elektrischen Effekt verursacht eine wesentliche Verbes serung der Empfindlichkeit des akustisch-elektrischen Wandlers. Dadurch kann die elektrische Signalverstär kung in der Auswerteschaltung der Vorrichtung kleiner sein, was einen größeren elektrischen Störabstand er gibt.In the sound recording sleeve 60 , an insulating tube 62 and a piezoelectric element 63 , z. B. arranged from ceramic. On the piezoelectric element 63 , a brass disk 64 is mounted. A spring 65 is located between a connecting plate 66 and the brass disk 64 . The effect of the spring 65 and the brass disk 64 is that the piezoelectric effect is enhanced. The amplification of the piezoelectric effect causes a substantial improvement in the sensitivity of the acoustic-electrical transducer. As a result, the electrical signal amplification in the evaluation circuit of the device can be smaller, which gives a greater electrical signal-to-noise ratio.
Gegen äußere Beeinflussung der Funktionen der Vorrich tung wurden folgende Maßnahmen vorgesehen. Um eine gute elektrische und magnetische Abschirmung zu verwirkli chen, wurde das zweiteilige Gehäuse der Vorrichtung aus Stahl hergestellt, so daß es zusätzlich einen wirksamen mechanischen Schutz der ganzen Vorrichtung bildet. Um Einstreuung magnetischer und elektrischer Störungen in den Eingangskreis der Auswerteschaltung der Vorrichtung zu verhindern, ist das Gehäuse mit dem Null-Potential dieser Schaltung galvanisch verbunden.Against external influences on the functions of the device The following measures have been planned. To be a good one to confuse electrical and magnetic shielding Chen, the two-part housing of the device was made Steel made so that it is also an effective mechanical protection of the whole device forms. Around Interference with magnetic and electrical interference in the input circuit of the evaluation circuit of the device the housing with the zero potential must be prevented this circuit galvanically connected.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823249866 DE3249866C2 (en) | 1982-06-11 | 1982-06-11 | Acoustic-electrical transducer for monitoring armoured rooms (spaces) |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823221997 DE3221997A1 (en) | 1982-06-11 | 1982-06-11 | DEVICE FOR MONITORING ARMORED ROOMS, ESPECIALLY SAFE AND CABINETS, AND FOR GENERATING AN ALARM SIGNAL WHEN A BURGLAR ATTEMPT IS TAKEN |
DE19823249866 DE3249866C2 (en) | 1982-06-11 | 1982-06-11 | Acoustic-electrical transducer for monitoring armoured rooms (spaces) |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3249866C2 true DE3249866C2 (en) | 1988-07-14 |
Family
ID=25802368
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19823249866 Expired DE3249866C2 (en) | 1982-06-11 | 1982-06-11 | Acoustic-electrical transducer for monitoring armoured rooms (spaces) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3249866C2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29722430U1 (en) * | 1997-12-18 | 1998-02-26 | Siemens Ag | Room monitoring device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2721880B2 (en) * | 1976-05-17 | 1980-11-13 | Matsushita Electric Works, Ltd., Kadoma, Osaka (Japan) | Device for the detection of vibrations caused by attempts to damage buildings |
-
1982
- 1982-06-11 DE DE19823249866 patent/DE3249866C2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2721880B2 (en) * | 1976-05-17 | 1980-11-13 | Matsushita Electric Works, Ltd., Kadoma, Osaka (Japan) | Device for the detection of vibrations caused by attempts to damage buildings |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29722430U1 (en) * | 1997-12-18 | 1998-02-26 | Siemens Ag | Room monitoring device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
Q172 | Divided out of (supplement): |
Ref document number: 3221997 Ref country code: DE |
|
8101 | Request for examination as to novelty | ||
8110 | Request for examination paragraph 44 | ||
AC | Divided out of |
Ref country code: DE Ref document number: 3221997 Format of ref document f/p: P |
|
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |