CN2482162Y - Active theftproof alarm - Google Patents
Active theftproof alarm Download PDFInfo
- Publication number
- CN2482162Y CN2482162Y CN 01218679 CN01218679U CN2482162Y CN 2482162 Y CN2482162 Y CN 2482162Y CN 01218679 CN01218679 CN 01218679 CN 01218679 U CN01218679 U CN 01218679U CN 2482162 Y CN2482162 Y CN 2482162Y
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Abstract
The utility model relates to an active theftproof alarm which comprises a vibration sensor, a signal processing circuit, an alarm and time delay circuit, a voice circuit, an audio frequency amplification circuit, a loudspeaker, a light-operated switch, a reset switch K and a reset circuit. The utility model also comprises an electromagnetic interference resistance unit which is composed of an electromagnetic receiving circuit, an amplification circuit and a signal processing circuit which are connected orderly. After the electromagnetic interference signal is carried out the amplification process, the utility model controls an alarm circuit to stop working rather than filters the interference signal. The utility model thoroughly solves the problem of false alarm caused by the electromagnetic interference and has the advantages of simple structure and easy implement.
Description
The utility model relates to a kind of active burglar alarm, mainly contain oscillatory type, magnetic-type (Hall element), when people's illegal invasion (sled is pounded door and window), change vibration into electric signal by vibration transducer, or the magnet on the door will be opened the door by magneto sensor the time moves the transformation electric signal.When forcing open the door the window burglary, the robber sends the sound and light alarm signal.
At present, the active anti-intrusion alarm of selling on the market, treated then amplification (trigger or comparison amplifier are generally all arranged) removes to trigger warning circuit.This type of alarm is in order to prevent extraneous electromagnetism interference (as the various electromagnetism skin pulse in the pulse in the power supply, the environment), generally all in the signal input circuit of sensor, filtering circuit is set, as resistance capacity filter, ∏ mode filter etc., though obviously improved antijamming capability, but can't solve interference problem fully, still have a spot of undesired signal to cause false alarm, influence the application of alarm.
The purpose of this utility model just provides a kind ofly can eliminate electromagnetic interference (EMI), active burglar alarm that can false alarm.
The technical solution of the utility model is: increased an anti-electromagnetic interference (EMI) unit on the basis of existing technology, its circuit structure is: involving vibrations sensor, signal processing circuit, postponement warning and delaying circuit, sound circuit, maintenance warning and delaying circuit, audio amplifier circuit, loudspeaker, light-operated switch, reset switch K, reset circuit, have a plurality of vibration transducers to be installed in respectively on the door and window, the output of the vibration transducer on the door connects signal processing circuit A1 successively, postpones warning and delaying circuit, signal processing circuit B; The output of signal processing circuit B is divided into two-way, and one the tunnel is connected with keeping warning and delaying circuit, and another back, road connects sound circuit, audio amplifier circuit, loudspeaker successively; The output of the vibration transducer on the window is connected with the input end of signal processing circuit B behind signal processing circuit A2; Light-operated switch and the input end that is connected to reset circuit after reset switch K is in parallel, its output terminal is divided into two-way, one the road is connected to signal processing circuit B, another road is connected to the control end that keeps warning and delaying circuit, and the anti-electromagnetic interference (EMI) unit that the utility model increases is made of the electromagnetism receiving circuit, amplifying circuit, the signal processing circuit that connect successively.
Described electromagnetism receiving circuit is that the telefault L and the filter capacitor C18 in parallel with it that have high frequency magnetic core are fine into.
Described amplifying circuit comprises by BG11, BG12, BG13, BG17 level Four radio-frequency amplifier, the base stage of triode BG11 is connected with the end of the coil L of electromagnetism receiving circuit, its grounded emitter, its collector one tunnel is connected with positive source with R27 series connection back, another road connects R28, C20, the end of C21, the other end of R28 is connected with the other end of coil L and the end of C19, C19, the other end ground connection of C20, the other end of C21 connects the base stage of BG12, its emitter is through R29 ground connection, its collector is connected with the end of R31 and the base stage of BG13, R30 in parallel between the base stage of BG12 and collector, the other end of R31 is connected with electrode anode, and the emitter of BG13 is through R33 ground connection, collector connects positive source through R32, be connected with the base stage of BG17 through C23, also gone here and there R39 with positive interpolar, the emitter-base bandgap grading of BG17 is through the R41 and the C25 ground connection of parallel connection, its collector R40 that connects with positive interpolar, and be connected to the signal processing circuit input end through C26.
Described signal processing circuit comprises multiplication of voltage detecting circuit and three grades of phase inverters, the rear end of the C26 of higher level's amplifying circuit is connected with the negative pole of diode D1 and the positive pole of D2, the plus earth of D1, the negative pole of D2 are through C27 ground connection, and D1, D2 and C27 constitute the multiplication of voltage detecting circuit; The negative pole of D2 also is connected with the base stage of G20, its emitter grounding, its collector is connected with the end of R43 and the base stage of BG19, another termination positive source of R43, between the base stage of G20 and collector, be parallel with R42, the emitter grounding of BG19, collector connects positive source through R44, and is connected with 2 pin of IC5, the 1 pin ground connection of IC5,5,6,7 pin are through C28 ground connection, 4,8 pin connect positive source, and the LED of connect between 3 pin and the ground R45 and forward, 3 pin also are connected to the control end of signal processing circuit B through R47, make it or be in cut-off state, or be in normal operating conditions.
Described signal processing circuit B is 555 time-base integrated circuits, and the output terminal of anti-electromagnetic interference (EMI) unit is connected to 4 pin of this 555 time base circuit.
The utility model has the advantages that: electromagnetic interference signal is removed to control warning circuit after processing and amplifying it is quit work, rather than simple filtering interference signals.Thoroughly solved the false alarm problem that electromagnetic interference (EMI) causes, its simple in structure, easy enforcement.
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is a circuit block diagram of the present utility model;
Fig. 2 is the circuit diagram of anti-electromagnetic interference (EMI) of the present utility model unit.
Referring to Fig. 1, prior art part involving vibrations sensor of the present utility model, signal processing circuit, postponement warning and delaying circuit, maintenance warning and delaying circuit, sound circuit, audio amplifier circuit, loudspeaker, light-operated switch, reset switch K, reset circuit, have a plurality of vibration transducers to be installed in respectively on the door and window, the output of the vibration transducer 1 on the door connects signal processing circuit A1 successively, the postponement warning is prolonged is circuit, signal processing circuit B; The output of signal processing circuit B is divided into two-way, and one the tunnel is connected with keeping warning and delaying circuit, and another back, road connects sound circuit, audio amplifier circuit, loudspeaker successively; The output of the dynamic sensor 2 on the window is connected with the input end of signal processing circuit B behind signal processing circuit A2; Light-operated switch and the input end that is connected to reset circuit after reset switch K is in parallel, its output terminal is divided into two-way, and one the road is connected to signal processing circuit B, and another road is connected to the control end that keeps warning and delaying circuit.The anti-electromagnetic interference (EMI) unit that increases of the present utility model is made of the electromagnetism receiving circuit, amplifying circuit, the signal processing circuit that connect successively.The output terminal of this unit is connected with the control end of above-mentioned signal processing circuit B.
Referring to Fig. 2, the anti-electromagnetic interference (EMI) unit of the utility model design is made of the electromagnetism receiving circuit, amplifying circuit, signal processing circuit three parts that connect successively.Wherein:
First is the electromagnetism receiving circuit, and its structure is to have the telefault L of high frequency magnetic core and the filter capacitor C18 composition in parallel with it.
Second portion is an amplifying circuit, it comprises by BG11, BG12, BG13, BG17 level Four radio-frequency amplifier, the base stage of triode BG11 is connected with the end of the coil L of electromagnetism receiving circuit, its grounded emitter, its collector one tunnel is connected with positive source with R27 series connection back, another road connects R28, C20, the end of C21, the other end of R28 is connected with the other end of coil L and the end of C19, C19, the other end ground connection of C20, the other end of C21 connects the base stage of BG12, its emitter is through R29 ground connection, and its collector is connected with the end of R31 and the base stage of BG13, R30 in parallel between the base stage of BG12 and collector, the other end of R31 is connected with electrode anode, the emitter of BG13 is through R33 ground connection, and collector connects positive source through R32, is connected with the base stage of BG17 through C23, also gone here and there R39 with positive interpolar, the emitter-base bandgap grading of BG17 is through the R41 and the C25 ground connection of parallel connection, its collector R40 that connects with positive interpolar, and be connected to the signal processing circuit input end through C26.
Third part is a signal processing circuit, comprise multiplication of voltage detecting circuit and three grades of phase inverters, the rear end of the C26 of higher level's amplifying circuit is connected the plus earth of D1 with the negative pole of diode D1 and the positive pole of D2, the negative pole of D2 is through C27 ground connection, and D1, D2 and C27 constitute the multiplication of voltage detecting circuit; The negative pole of D2 also is connected with the base stage of G20, its emitter grounding, its collector is connected with the end of R43 and the base stage of BG19, another termination positive source of R43, between the base stage of G20 and collector, be parallel with R42, the emitter grounding of BG19, collector connects positive source through R44, and is connected with 2 pin of IC5, the 1 pin ground connection of IC5,5,6,7 pin are through C28 ground connection, 4,8 pin connect positive source, and the LED of connect between 3 pin and the ground R45 and forward, 3 pin also are connected to the control end of signal processing circuit B through R47, make it or be in cut-off state, or be in normal operating conditions.
Described signal processing circuit B is 555 time-base integrated circuits, and the output terminal of anti-electromagnetic interference (EMI) unit is connected to 4 pin of this 555 time base circuit.
Principle of work of the present utility model: when the stranger forced open the door, its vibration wave was converted to electric signal by vibration transducer 1, and this signal is transformed to switching signal after the amplification multiplication of voltage detection of signal processing circuit A1.This signal through time-delay (can the be set at 1 minute) back of postpone reporting to the police by signal processing circuit B rear drive voice IC, and after the audio frequency amplification by the loudspeaker y alerting signal of sounding.The purpose of postponing the time-delay of reporting to the police is in order to reserve the time that the people on one's own side opens the door and enters.In 1 minute, the light-operated switch on the trigger gate that opens the door resets alarm and does not send alerting signal before reporting to the police.In case after reporting to the police, stop automatically again behind the time of fire alarming (as 10 minutes) that keeps warning and delaying circuit to make alarm keep setting, so that cause people's attention on every side.
Vibration transducer 2 is arranged on the window, is not provided with on this circuit to postpone the time-delay of reporting to the police, in case there is sound just to report to the police immediately.
Reset switch K resets to alarm and is provided with for be subjected to known vibration (people on one's own side or child's collision) back at vibration transducer.
The principle of work of anti-electromagnetic interference (EMI) of the present utility model unit is: when mixed and disorderly Electromagnetic Interference signal is arranged in the air, received by the telefault L on the high frequency magnetic core, signal amplifies through transistor BG11 high frequency, the pulse electrical signal that amplifies is coupled to BG12 through capacitor C 21, BG13, BG17, amplify after deliver to diode D1 after the capacitor C 26, detection becomes direct current signal to be added in the base stage of transistor BG20 to D2 with the C27 multiplication of voltage, make the BG20 conducting, BG19 ends, make 2 pin of IC5 become high level, 3 pin transfer low level to, 3 pin of IC5 are connected with the 4th pin of signal processing circuit B (555) time base circuit, make this circuit be output as low level, if this moment this noise jamming signal triggering the signal processing circuit A1 and the A2 of front, but because circuit B is exported in electronegative potential by this noise jamming signal clamper, it can not trigger the warning circuit of back, has reached the not purpose of false alarm of anti-electromagnetic interference (EMI).
When no Electromagnetic Interference, transistor BG19 conducting, 2 pin of IC5 are electronegative potential, and 3 pin are high level, and making the 4th pin of signal processing circuit B (555 time base circuit) is noble potential, makes it be in normal operating conditions (monitoring state).
Claims (5)
1, a kind of active burglar alarm, involving vibrations sensor, signal processing circuit, postponement warning and delaying circuit, maintenance warning and delaying circuit, sound circuit, audio amplifier circuit, loudspeaker, light-operated switch, reset switch K, reset circuit, have a plurality of vibration transducers to be installed in respectively on the door and window, the output of the vibration transducer on the door connects signal processing circuit A1 successively, postpones warning and delaying circuit, signal processing circuit B; The output of signal processing circuit B is divided into two-way, and one the tunnel is connected with keeping warning and delaying circuit, and another back, road connects sound circuit, audio amplifier circuit, loudspeaker successively; The output of the vibration transducer on the window is connected with the input end of signal processing circuit B behind signal processing circuit A2; Light-operated switch and the input end that is connected to reset circuit after reset switch K is in parallel, its output terminal is divided into two-way, one the road is connected to signal processing circuit B, another road is connected to the control end that keeps warning and delaying circuit, it is characterized in that: also comprise anti-electromagnetic interference (EMI) unit, it is made of the electromagnetism receiving circuit, amplifying circuit, the signal processing circuit that connect successively.
2, active burglar alarm according to claim 1 is characterized in that: described electromagnetism receiving circuit is to have the telefault L of high frequency magnetic core and the filter capacitor C18 composition in parallel with it.
3, active burglar alarm according to claim 1, it is characterized in that: described amplifying circuit comprises by BG11, BG12, BG13, BG17 level Four radio-frequency amplifier, the base stage of triode BG11 is connected with the end of the coil L of electromagnetism receiving circuit, its grounded emitter, its collector one tunnel is connected with positive source with R27 series connection back, another road connects R28, C20, the end of C21, the other end of R28 is connected with the other end of coil L and the end of C19, C19, the other end ground connection of C20, the other end of C21 connects the base stage of BG12, its emitter is through R29 ground connection, its collector is connected with the end of R31 and the base stage of BG13, R30 in parallel between the base stage of BG12 and collector, the other end of R31 is connected with electrode anode, the emitter of BG13 is through R33 ground connection, collector connects positive source through R32, be connected with the base stage of BG17 through C23, also gone here and there R39 with positive interpolar, the emitter-base bandgap grading of BG17 is through the R41 and the C25 ground connection of parallel connection, its collector R40 that connects with positive interpolar, and be connected to the signal processing circuit input end through C26.
4, active burglar alarm according to claim 1, it is characterized in that: described signal processing circuit comprises multiplication of voltage detecting circuit and three grades of phase inverters, the rear end of the C26 of higher level's amplifying circuit is connected with the negative pole of diode D1 and the positive pole of D2, the plus earth of D1, the negative pole of D2 is through C27 ground connection, and D1, D2 and C27 constitute the multiplication of voltage detecting circuit; The negative pole of D2 also is connected with the base stage of G20, its emitter grounding, its collector is connected with the end of R43 and the base stage of BG19, another termination positive source of R43, between the base stage of G20 and collector, be parallel with R42, the emitter grounding of BG19, collector connects positive source through R44, and is connected with 2 pin of IC5, the 1 pin ground connection of IC5,5,6,7 pin are through C28 ground connection, 4,8 pin connect positive source, and the LED of connect between 3 pin and the ground R45 and forward, 3 pin also are connected to the control end of signal processing circuit B through R47, make it or be in cut-off state, or be in normal operating conditions.
5, according to claim 1 or 4 described active burglar alarms, it is characterized in that: described signal processing circuit B is 555 time-base integrated circuits, and the output terminal of anti-electromagnetic interference (EMI) unit is connected to 4 pin of this 555 time base circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01218679 CN2482162Y (en) | 2001-04-16 | 2001-04-16 | Active theftproof alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01218679 CN2482162Y (en) | 2001-04-16 | 2001-04-16 | Active theftproof alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2482162Y true CN2482162Y (en) | 2002-03-13 |
Family
ID=33636674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01218679 Expired - Fee Related CN2482162Y (en) | 2001-04-16 | 2001-04-16 | Active theftproof alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2482162Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108733022A (en) * | 2017-04-14 | 2018-11-02 | 横河电机株式会社 | Safety instrument control device, factory control method and safety instrumented systems |
-
2001
- 2001-04-16 CN CN 01218679 patent/CN2482162Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108733022A (en) * | 2017-04-14 | 2018-11-02 | 横河电机株式会社 | Safety instrument control device, factory control method and safety instrumented systems |
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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 |