CN2049001U - Anti theft alarm - Google Patents
Anti theft alarm Download PDFInfo
- Publication number
- CN2049001U CN2049001U CN 89207658 CN89207658U CN2049001U CN 2049001 U CN2049001 U CN 2049001U CN 89207658 CN89207658 CN 89207658 CN 89207658 U CN89207658 U CN 89207658U CN 2049001 U CN2049001 U CN 2049001U
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- China
- Prior art keywords
- alarm
- permanent magnet
- inductive coil
- magnet component
- coil
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- 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.)
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- Burglar Alarm Systems (AREA)
Abstract
The utility model relates to an anti-theft alarm, composed of an electromagnetic sensor, a signal amplifier and an alarm signal generator. The utility model is characterized in that the electromagnetic sensor is composed of a permanent magnet suspended by a steel wire and a spiral inducing coil with an iron core, and the permanent magnet and the inducing coil are slightly moved and oppositely displaced to generate an induced electromotive force which triggers a circuit to alarm. The utility model has lower manufacturing cost than various alarm devices adopting the high-scientific technique and strong anti-interference performance and is not easy to be identified, being suitable for being used for alarm occasions not allowing to be slightly moved, such as parking automobiles, tractors or strong boxes, strong rooms, etc.
Description
The utility model relates to a kind of burglar alarm, and particularly a kind of electronic alarm of fine motion relative displacement can be used for generally stealing warning or proof box, strong-room is antitheft and the stolen alarm of vehicle.
Now use burglar alarm, roughly can divide two classes, a class adopts the high-tech technology, report to the police as microwave, infrared alarming utilizes Hall element or magnetodiode for the type of alarm of sensor etc., this class warning device price is higher, debug loaded down with trivial details, higher to environmental requirement; The another kind of routine techniques that utilizes is reported to the police as infrared mutual-tube, induction or touch mode alarm, and tongue tube warning etc., though this class alarm cost is low, sensitivity is low, is subject to disturb, and is easily penetrated and destroys.
A kind of commercially available displacement-type alarm adopts the microcontact sensing, horizontal level is installed is had relatively high expectations, and needs during inclination can use through levelling, and the easy oxidation in contact simultaneously is malfunctioning, causes and fails to report.
The purpose of this utility model is to overcome the deficiency of above-mentioned alarm and provides a kind of cost muting sensitivity height, easy to use and reliable burglar alarm.
Task of the present utility model is to realize like this, with a special electromagnetic sensor and electronic signal amplifier, the alerting signal generator is connected, electromagnetic sensor is made up of the spiral pipe inductive coil of pendulum model permanent magnet component and ribbon core, permanent magnet component is suspended on the frame of alarm through filament, and and inductive coil between leave the gap.Adopt the electromagnetic sensor of this structure, higher fine motion relative displacement sensitivity is arranged, the induced electromotive force that coil produces can trigger general electronic circuit completely and report to the police.
Permanent magnet component and inductive coil can adopt following three kinds of modes to settle.First kind of mode is the outside that permanent magnet component is in a utmost point of inductive coil, iron core in the coil inserts in the coil from the end of coil away from permanent magnet component, it inserts length less than the coil total length, 2/3 of desirable coil total length, with prevent permanent magnet component directly with iron core adhesive mutually, can guarantee again that permanent magnet component is experienced in the coil can produce enough big induced current when fine motion.
The second way is the top, spiral inductive coil middle part that permanent magnet component is suspended on horizontally set, and iron core runs through the coil two ends.
The third mode is that permanent magnet component is made bell-type or hollow type right cylinder, and a utmost point of inductive coil upwards stretches into the central authorities of permanent magnet component, and the iron core in the coil then is in the outside of permanent magnet component.Adopt this mode sensor to have higher fine motion sensitivity.
Sensor can place in the magnetic shielding cover, to avoid the interference of extraneous magnetic bodies to sensor.
The electronic signal amplifier can be made with integrated component, and the little stability of volume is high, and is convenient to install, adopt and trigger the self-latching relay latching circuit, amplifier is triggered once the fine motion transducing signal, promptly be in alarm condition,, do not interrupt reporting to the police for cutting off the electricity supply without the people.The alerting signal generator can adopt general audio-frequency generator as required or adopt radio transmitter.
A kind of single unit system of alarm can be with sensor, and amplifier, alerting signal generator and power supply are placed in a rigid container sealing or lid with lock, prevents to destroy.
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1-the 3rd, three kinds of forms of electromagnetic sensor.Permanent magnet 2 hangs on the frame 3 through finer wire 1 among Fig. 1, one end of coil 4 is near permanent magnet 2, leave the 5-10mm gap, the iron core 5 that soft iron is made is provided with away from permanent magnet 2, and the effective length of iron core 5 in coil 4 is about coil 4 total lengths 2/3.When the sensor installation has inclination slightly, still can keep fine motion sensitivity like this, and permanent magnet 2 can adhesive with iron core 5.Permanent magnet 2 is suspended on coil 4 tops through finer wire 1 among Fig. 2, is as the criterion not bump.Iron core 5 runs through coil 4 two ends.This mode requires lower to the sensor installation position, allow inclined degree bigger.Permanent magnet 2 is the bell-type cylinder among Fig. 3, is suspended on coil 4 tops through finer wire 1, and coil 4 one ends stretch into the central authorities of permanent magnet 2, keeps a segment distance between iron core 5 in the coil 4 and the permanent magnet 2.Permanent magnet 2 also can be made into hollow cylinder.This mode transducer sensitivity is higher, requires to want strict but settle.
Fig. 4 is a kind of one-piece construction synoptic diagram of alarm.Sensor 6, circuit parts assembly 7, sound generator 8 and battery 9 are placed in the rigid container 10, lid 11 is used for device to be installed, and changes battery or stirs starting switch (not shown) usefulness, and lock 12 can pin lid 11, and can with the starting switch interlock, sensor 6 is placed the centre of radome 13.This alarm can be placed in the inside of the facility that maybe need insure in the automobile, opens the burglar alarm switch, and alarm is on the alert, and disturbs in case sensor 6 is subjected to fine motion, and sound generator 8 is just reported to the police.
Fig. 5 is a kind of circuit block diagram of alarm.The coil of sensor 6 is connected with signal amplification circuit, and the power electronic switch circuit of alerting signal generator is controlled by signal amplification circuit, and the energy self-locking, does not cut off general supply after the warning and does not then interrupt reporting to the police.Whole device seals with rigid material, and alarm is fixed on to be needed on the antitheft facility.This alarm cost is lower, but safe and reliable, is difficult for being identified and destroying.
The utility model is owing to adopt high-sensitive electromagnetic sensor, and cost is far below all kinds of alarms that adopt the high-tech technology, and anti-tampering performance is strong, and is easy to use; Be difficult for being identified, can be used for the stolen warning of automobile and tractor and safety box, strong-room burglar alarm, also can be used as general theft, stealing or intruder report to the police, and need only the occasion that does not allow to take place fine motion in the warning phase, all can use.
Claims (6)
1, a kind of burglar alarm.Mainly by sensor.Electronic signal amplifier and alerting signal generator are formed.It is characterized in that described sensor is an electromagnetic sensor.It is made up of the spiral pipe inductive coil of pendulum model permanent magnet component and ribbon core.Permanent magnetic unit is suspended on the alarm frame through filament.And and inductive coil between leave the gap.Inductive coil and signal amplifier input end are electrically connected and connect.
2, the alarm of stipulating according to claim 1, it is characterized in that described permanent magnet component is in the outside of a utmost point of inductive coil, iron core less than the coil length overall, for example is 2/3 of loop length from the length of inserting coil inside away from inductive coil one utmost point of permanent magnet component.
3, according to the alarm of claim 1 regulation, it is characterized in that described permanent magnet component is in the upside at the inductive coil middle part of horizontally set, iron core runs through inductive coil the two poles of the earth.
4, according to the alarm of claim 1 regulation, it is characterized in that described permanent magnet component is hollow or bell-type right cylinder, a utmost point of inductive coil upwards stretches into right cylinder permanent magnet component core, and the iron core in the inductive coil is in the outside of permanent magnet component.
5, according to the alarm of claim 1,2,3 or 4 regulations, it is characterized in that described sensor is provided with a magnetic shielding cover.
6, according to the alarm of claim 5 regulation, it is characterized in that described electromagnetic sensor and signal amplifier, alerting signal generator, power supply are installed in the rigid seal container, perhaps are installed in the rigid container of a lid with lock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89207658 CN2049001U (en) | 1989-05-25 | 1989-05-25 | Anti theft alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89207658 CN2049001U (en) | 1989-05-25 | 1989-05-25 | Anti theft alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2049001U true CN2049001U (en) | 1989-12-06 |
Family
ID=4864479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89207658 Withdrawn CN2049001U (en) | 1989-05-25 | 1989-05-25 | Anti theft alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2049001U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105311893A (en) * | 2015-11-07 | 2016-02-10 | 常州大学 | Monitoring terminal for bag-type dust collection facilities |
| CN109887207A (en) * | 2018-11-14 | 2019-06-14 | 国网新疆电力有限公司奎屯供电公司 | Vibration induction formula wireless power equipment alarm device |
-
1989
- 1989-05-25 CN CN 89207658 patent/CN2049001U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105311893A (en) * | 2015-11-07 | 2016-02-10 | 常州大学 | Monitoring terminal for bag-type dust collection facilities |
| CN109887207A (en) * | 2018-11-14 | 2019-06-14 | 国网新疆电力有限公司奎屯供电公司 | Vibration induction formula wireless power equipment alarm device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |