CN2418535Y - Anti-theft anti-lose alarm - Google Patents
Anti-theft anti-lose alarm Download PDFInfo
- Publication number
- CN2418535Y CN2418535Y CN 00207698 CN00207698U CN2418535Y CN 2418535 Y CN2418535 Y CN 2418535Y CN 00207698 CN00207698 CN 00207698 CN 00207698 U CN00207698 U CN 00207698U CN 2418535 Y CN2418535 Y CN 2418535Y
- Authority
- CN
- China
- Prior art keywords
- receiving system
- circuit
- alarm
- transmitting
- crystal oscillator
- 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 - Fee Related
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- Burglar Alarm Systems (AREA)
Abstract
The utility model provides a long distance alarm, which comprises a transmitting system and a receiving system, wherein the transmitting system is arranged on valuables, and the receiving system is carried about by a master. The transmitting system is a transmitting circuit composed of a crystal oscillator, a triode, an adjustable medium frequency transformer and a transmitting antenna, and the receiving system comprises a frequency selection circuit, an amplifying circuit and an alarm circuit. When the transmitting system is beyond the receiving range of the receiving system, the receiving system can send out an alarm sound. The utility model has the advantages of simple structure and convenient operation.
Description
The utility model relates to a kind of alarm, relates in particular to a kind of alarm that alerting signal will take place outside certain scope that exceeds.
Be used at present antitheft, anti-lose alarm is many, the modal alarm that is used on the vehicle, need send alerting signal by touch, and the alerting signal generator often is installed on one's body the valuables, the robber is very easy to find the position of warning, and the destruction warning system, when article are far away, then can't hear chimes of doom as owner in addition.
The purpose of this utility model is exactly at above-mentioned deficiency, and a kind of novel alarm is provided, and this alarm be with oneself by owner, when article leave owner above the scope stipulated, will send alerting signal.
The purpose of this utility model can realize by following scheme, comprises emission coefficient and receiving system two parts, wherein the radiating circuit be made up of crystal oscillator, triode, adjustable mean frequency transformer and emitting antenna of emission coefficient; Receiving system then comprises frequency selection circuit, amplifying circuit and warning circuit three parts, emission coefficient is installed on the valuables, receiving system then is with oneself by owner, in specialized range, the rectangular wave that emission coefficient is sent can be received system and receive, in case when surpassing this scope, then send alerting signal.
Below in conjunction with accompanying drawing utility model is further described.
The schematic diagram of Fig. 1, the utility model emission coefficient.
The schematic diagram of Fig. 2, the utility model receiving system.
The rectangular wave that sends referring to Fig. 1, crystal oscillator KG1 is through the amplification of triode BG1, again by being I.F.T. B1 coupling after antenna Y1 launches, in addition with crystal oscillator KG1 mutually and that connect is variable resistor W1, its effect is the distance of regulating emission.
Comprise by antenna Y2 the frequency selection circuit that magnetic antenna B2 and capacitor C 1 are formed referring to Fig. 2, receiving system; BG2, resistance R 3, R4, capacitor C 2 and variable resistor W2 form amplifying circuit, and the warning circuit of capacitor C 3, crystal oscillator KG2 and ceramic horn RL composition.The rectangular wave that is sent by emission coefficient is when the receivable scope of receiving system, the system that is received receives, after frequency-selecting is amplified, enter warning circuit, because crystal oscillator BG2 connects, ceramic horn RL can not send alarm sound, in case when emission coefficient had been left the scope that receiving system can receive, crystal oscillator BG2 can not connect, ceramic horn RL will send alarm sound, the utility model is simple in structure, and is convenient and practical.
Claims (1)
1, a kind of antitheft, anti-lose alarm comprises emission coefficient and receiving system, it is characterized in that: described emission coefficient by crystal oscillator KG1, triode BG1, be the radiating circuit that I.F.T. B1 and emitting antenna Y1 form; Described receiving system comprises the frequency selection circuit of being made up of antenna Y2, magnetic antenna B2 and capacitor C 2, warning circuit three parts that amplifying circuit that triode BG2, resistance R 3, R4, capacitor C 2 and variable resistor W2 form and capacitor C 3, crystal oscillator KG2 and ceramic horn RL form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00207698 CN2418535Y (en) | 2000-04-12 | 2000-04-12 | Anti-theft anti-lose alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00207698 CN2418535Y (en) | 2000-04-12 | 2000-04-12 | Anti-theft anti-lose alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2418535Y true CN2418535Y (en) | 2001-02-07 |
Family
ID=33575285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00207698 Expired - Fee Related CN2418535Y (en) | 2000-04-12 | 2000-04-12 | Anti-theft anti-lose alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2418535Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107610412A (en) * | 2017-09-30 | 2018-01-19 | 中山市民众镇民众中心小学 | A kind of wireless anti-loss device |
-
2000
- 2000-04-12 CN CN 00207698 patent/CN2418535Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107610412A (en) * | 2017-09-30 | 2018-01-19 | 中山市民众镇民众中心小学 | A kind of wireless anti-loss device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |