CN2203472Y - Burglar alarm - Google Patents
Burglar alarm Download PDFInfo
- Publication number
- CN2203472Y CN2203472Y CN 94246955 CN94246955U CN2203472Y CN 2203472 Y CN2203472 Y CN 2203472Y CN 94246955 CN94246955 CN 94246955 CN 94246955 U CN94246955 U CN 94246955U CN 2203472 Y CN2203472 Y CN 2203472Y
- Authority
- CN
- China
- Prior art keywords
- probe
- point
- transmission line
- collector
- integrated circuit
- 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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- Alarm Systems (AREA)
Abstract
The utility model relates to a burglar proof alarm which is composed of a probe, a transmission line and a host machine. The utility model is characterized in that the probe is connected with the host machine via the transmission line, the probe is composed of a time base circuit IC, a triode, a resistor and a light emitting diode, and the host machine is composed of three triodes, a resistor, a capacitor and a relay. When an alarm happens, the 'o' point electric potential of the host machine is either increased or reduced, and thus the relay J is moved and switched on to alarm. The utility model has the function that the burglar proof alarm can alarm when the transmission line lies in the states of circuit short, circuit break and stealing.
Description
The utility model relates to warning device, especially for antitheft, and the anti-ruined multichannel wired alarm of transmission line.
At present, the wireless anti-theft alarming device poor anti jamming capability that sell in market, the wrong report probability is treated coldly by the user greatly.Wired burglar alarm, as anti-transmission line is housed is artificially cut off or short circuit, must add anti-opening circuit and short-circuit preventing device in addition, it is too many to set up line, is not easy to multichannel and installs, and the phenomenon of main frame occurs burning out.
The purpose of this utility model be exactly provide at above-mentioned defective a kind of have transmission line by short circuit, open circuit, the stolen burglar alarm that all can report to the police.
The purpose of this utility model is achieved in that a kind of burglar alarm, is by main frame, and transmission line and probe are formed, and it is characterized in that: the A of probe, B two ends are connected with " O " point of positive supply and main frame respectively by transmission line;
(a) described probe is by integrated circuit (IC), resistance R
4, R
5, triode BG
4, and light emitting diode LD constitute, wherein the power input of integrated circuit (IC) connects A, B 2 points; The output termination triode BG of IC
4Base stage, BG
4Emitter connect " O " point of host circuit; Resistance R
5After being connected in series with light emitting diode LD again with R
4Be connected in parallel R
4, R
5Connection termination positive source, R
4The other end and the negative terminal parallel connection of LD after meet BG
4Collector;
(b) described main frame is by triode BG
1, BG
2, BG
3, relay J, resistance R, R
1, R
2, R
3, capacitor C and light emitting diode HD form, and wherein R is series between power cathode and " O " point, R
2One is terminated at " O " point, another termination BG
2Base stage, BG
2Collector meet BG
3Base stage and R
3An end, BG
2, BG
3Emitter connect power cathode, BG
3Collector and R
3An end succeed the end of electrical equipment J, another termination positive source of J jointly; R
1A termination " O " point, R
1The positive pole of other end sending and receiving optical diode HD, the negative pole of HD meets BG respectively
1Base stage and the positive pole of capacitor C, the negative pole of C and BG
1Emitter meet power cathode, BG jointly
1Collector connect the end of J.
Integrated circuit (IC) in the described probe is a time-base integrated circuit.
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the burglar alarm circuit theory diagrams.
Principle of work of the present utility model is like this: during the alarm operate as normal, because the working current of probe integrated circuit (IC) makes the R two ends keep a metastable voltage drop." O " some current potential is higher, and electric current passes through R
2Make BG
2Saturation conduction, BG
3Cutoff relay J does not work, because R
1, HD hypotensive effect, deficiency is so that BG
1Conducting also is in cut-off state, and relay J is not worked, and luminotron HD is not luminous, probe triode BG
4Because of IC confiscates alerting signal, its base stage is in electronegative potential and ends, and luminotron LD is not luminous, and complete machine is in waiting status.
When entering within the investigative range if any the people, IC is triggered, and the IC upset makes BG
4Base stage is in noble potential, BG
4Conducting, light emitting diode LD is through R
5Current limliting and luminous, R
4Be pull-up resistor, effect is that " O " some current potential is further improved, and electric current is through R
1, HD makes BG
1Saturation conduction, warning circuit or alarm lamp are connected in the relay J action, and the prompting staff has theft alarm, if steal to compose transmission line is cut off, and then " O " some current potential is reduced to electronegative potential, BG
2End, the positive electrical stream of power supply is through relay coil J, R
3Make BG
3Be in the saturation conduction state, alarm relay, action, if artificial the transmission line short circuit, then " O " puts current potential and is in more noble potential, electric current is through R
1, HD makes BG
1Saturation conduction, the relay J action is connected warning circuit or alarm lamp and is reported to the police.
Claims (2)
1, burglar alarm is by main frame, and transmission line and probe are formed, and it is characterized in that: the A of probe, B two ends are connected with " O " point of positive supply and main frame respectively by transmission line;
(a) described probe is by integrated circuit (IC), resistance R
4, R
5, triode BG
4, and light emitting diode LD formation, wherein the power input of integrated circuit (IC) connects A, B 2 points; The output termination triode BG of IC
4Base stage, BG
4Emitter connect " O " point of host circuit; Resistance R
5After being connected in series with light emitting diode LD again with R
4Be connected in parallel R
4, R
5Connection termination positive source, R
4The other end and the negative terminal parallel connection of LD after meet BG
4Collector;
(b) described main frame is by triode BG
1, BG
2, BG
3, relay J, resistance R, R
1, R
2, R
3, capacitor C and light emitting diode HD form, and wherein R is series between power cathode and " O " point, R
2One is terminated at " O " point, another termination BG
2Base stage, BG
2Collector meet BG
3Base stage and R
3An end, BG
2, BG
3Emitter connect power cathode, BG
3Collector and R
3An end succeed the end of electrical equipment J, another termination positive source of J jointly; R
1A termination " O " point, R
1The positive pole of other end sending and receiving optical diode HD, the negative pole of HD meets BG respectively
1Base stage and the positive pole of capacitor C, the negative pole of C and BG
1Emitter meet power cathode, BG jointly
1Collector connect the end of J.
2, burglar alarm according to claim 1 is characterized in that: the integrated circuit (IC) in the probe is a time-base integrated circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 94246955 CN2203472Y (en) | 1994-12-09 | 1994-12-09 | Burglar alarm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 94246955 CN2203472Y (en) | 1994-12-09 | 1994-12-09 | Burglar alarm |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2203472Y true CN2203472Y (en) | 1995-07-12 |
Family
ID=33852310
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 94246955 Expired - Fee Related CN2203472Y (en) | 1994-12-09 | 1994-12-09 | Burglar alarm |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN2203472Y (en) |
-
1994
- 1994-12-09 CN CN 94246955 patent/CN2203472Y/en not_active Expired - Fee Related
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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 |