CN108230595A - A kind of anti-intrusion warning device and system - Google Patents
A kind of anti-intrusion warning device and system Download PDFInfo
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- CN108230595A CN108230595A CN201810011269.8A CN201810011269A CN108230595A CN 108230595 A CN108230595 A CN 108230595A CN 201810011269 A CN201810011269 A CN 201810011269A CN 108230595 A CN108230595 A CN 108230595A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 13
- 230000009545 invasion Effects 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 8
- 230000006378 damage Effects 0.000 claims description 4
- 230000005622 photoelectricity Effects 0.000 claims 1
- 230000004224 protection Effects 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 4
- 208000032365 Electromagnetic interference Diseases 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/18—Prevention or correction of operating errors
- G08B29/185—Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system
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- Burglar Alarm Systems (AREA)
Abstract
The invention discloses a kind of anti-intrusion warning device and systems.Specially, the warning device includes detector, detection circuit, electro-optical conversion circuit, Transmission Fibers, photoelectric switching circuit and alarm terminal, optical signal is converted the electrical signal to by electro-optical conversion circuit, and it is transmitted using Transmission Fibers, electric signal is converted optical signals to using photoelectric converter access alarm terminal again in receiving terminal, carry out alert process, avoid the situation that electric signal alarm circuit encounters thunder and lightning weather disruptions and various electromagnetic interferences, and the protection distance of alarm system is expanded, improve the reliability of warning device.
Description
Technical field
The present invention relates to detection alarm field, more particularly to a kind of anti-intrusion warning device and system.
Background technology
With being continuously increased for security protection application, the key protections region such as some government bodies' unit, museum, exhibition center
Requirement of the unit to safety technological guards such as locality protection, perimeter protections is continuously improved, therefore these units can all install large size
Alarm system, including multiple alarm host machines and multiple monitoring probes, (these probes can be infrared, microwave, the double mirror of infrared microwave
Detector, vibration detector, standing wave detector etc.)；But alarm host machine is typically only capable to be directly connected to the probe of 10 or so, works as spy
When large number of, the expansion module i.e. defence area expansion board by alarm system is needed to access alarm host machine, usual every piece of defence area
Expansion board can access 8 probes, need to install 30 pieces of defence area expansion boards if an alarm system needs 250 probes of management
It realizes, each piece of defence area expansion board is connected respectively by two data lines and the data communication bus interface of alarm host machine, by
In the data communication bus interface of alarm host machine, only there are one interfaces, and 30 pieces of defence area expansion boards are simultaneously in use, be equivalent to data
Bus interface has been connected in parallel 30 data lines.But these data lines, which have, to be easily disturbed, has distance limitation (ordinary circumstance
Down for 1500 meters, but distance can be extended, but total length still can be restricted by increasing signal extender), encounter thunder and lightning
The shortcomings of weather is easily damaged, these shortcomings have all seriously affected the reliability of alarm system.
Invention content
The purpose of the invention is to which anti-intrusion alarm circuit is avoided to encounter thunder and lightning weather to be damaged, that improves alarm system can
By the protective range of property and expansion alarm system, a kind of anti-intrusion warning device and system are provided.
To achieve the above object, the present invention provides following schemes：
A kind of anti-intrusion warning device, the warning device include detector, detection circuit, electro-optical conversion circuit, transmission
Optical fiber, photoelectric switching circuit and alarm terminal.
The detector is connect with the detection circuit, and the detector is for detecting whether someone invades, when someone enters
When invading, the detector is open circuit, and when nobody invades, the detector is access.
The detection circuit is connect with the electro-optical conversion circuit, and the detection circuit is used to detect the shape of the detector
State, and the state of the detector is converted into switching signal, and the switching signal is exported to the electro-optical conversion circuit.
It is connected between the electro-optical conversion circuit and the photoelectric switching circuit by the Transmission Fibers, the electric light turns
Circuit is changed for the switching signal to be converted into optical signal, and the optical signal is conveyed to by the Transmission Fibers described
Photoelectric switching circuit.
The photoelectric switching circuit is connect with the alarm terminal, and the photoelectric switching circuit is used for the optical signal solution
Code is conveyed to the alarm terminal into electric signal, and by the electric signal.
The alarm terminal is used to be alarmed according to the electric signal.
Optionally, the detection circuit includes window comparator and output relay.
The input terminal of the window comparator is connect with the detector, the output terminal of the window comparator with it is described defeated
Go out the control terminal connection of relay, the window comparator is used to the state of the detector is converted into voltage signal, and will
The voltage signal is exported to the output relay.
The output terminal of the output relay is connect with the electro-optical conversion circuit；The output relay is used for by described in
Voltage signal is converted into switching signal, and the switching signal is conveyed to the electro-optical conversion circuit.
Optionally, the warning device further includes power circuit, the power circuit respectively with detection circuit, electro-optic conversion
Circuit connects, and the power circuit is used to provide power supply for the detection circuit, electro-optical conversion circuit.
Optionally, the window comparator includes first resistor, second resistance and 3rd resistor, first comparator and second
Comparator；
The first resistor, second resistance and 3rd resistor are sequentially connected in series, the other end connection of the first resistor
The cathode of power supply, the anode of the other end connection power supply of the 3rd resistor；The common end of the first resistor and second resistance
The positive input terminal of the first comparator is connected, the second resistance connects second ratio with the common end of the 3rd resistor
Compared with the negative input end of device, the voltage of the first resistor and second resistance common end is lowest threshold voltage, the second resistance
Voltage with 3rd resistor common end is highest threshold voltage.
Optionally, the detection circuit further includes end resistance and reference resistance.
One end of the reference resistance and the cathode of power supply connect, the other end of the reference resistance and the end resistance
One end connection.
The detector is connected between the other end of the end resistance and the anode of the power supply.
The common end of the end resistance and the reference resistance is connect with the input terminal of the window comparator；
When someone invades, and the detector is open circuit or when the end resistance and the detector are switched off destroying
When, the output voltage of the end resistance and the output terminal of the reference resistance is zero, minimum less than the window comparator
Threshold voltage, the window comparator export low level, and the output relay disconnects.
When the end resistance and the detector are short-circuited destruction, the public affairs of the end resistance and the reference resistance
The output voltage held altogether is supply voltage, more than the highest threshold voltage of the window comparator, the window comparator output
Low level, the output relay disconnect.
When nobody's invasion and the not destroyed end resistance and detector, the detector is access, described
End resistance and the output voltage of the common end of the reference resistance are partial pressure of the reference resistance in series circuit, more than described
The lowest threshold voltage of window comparator and the highest threshold voltage for being less than the window comparator, the window comparator output
High level, the output relay are closed.
Optionally, the end resistance is encapsulated in the detector.
Optionally, the electro-optical conversion circuit includes LTX-510 electricals to optical converter.
Optionally, the photoelectric switching circuit includes ATX-525 photoelectric converters.
Optionally, the alarm terminal includes alarm and indicator light.
A kind of intrusion preventing alarm system, the alarm system include multiple anti-intrusion warning devices.
According to specific embodiment provided by the invention, the invention discloses following technique effects：
The invention discloses a kind of anti-intrusion warning device and system, the warning device include detector, detection circuit,
Electro-optical conversion circuit, Transmission Fibers, photoelectric switching circuit and alarm terminal convert the electrical signal to light by electro-optical conversion circuit
Signal, and be transmitted using Transmission Fibers, electric signal is converted optical signals to using photoelectric converter in receiving terminal, is connect
Receiving police, avoids electric signal alarm circuit and encounters the situation that thunder and lightning weather is damaged, improve the reliability of warning device.
The anti-intrusion warning device of the present invention by detector and detection circuit, can will invasion signal, short-circuit collapse state,
Breaking collapse state is converted into alarm signal, realizes the alarm to invasion, short circuit and open circuit, meets the requirement of security protection standard.
Description of the drawings
In order to illustrate the embodiments of the present invention more clearly, attached drawing required in embodiment will be briefly described below.
It is clear that drawings discussed below is only one embodiment of the present of invention, for those of ordinary skill in the art,
Under the premise of not making the creative labor, can also other accompanying drawings be obtained according to this attached drawing.
Fig. 1 is a kind of composition frame chart of anti-intrusion warning device provided by the invention；
Fig. 2 is a kind of composition frame chart of the detection circuit of anti-intrusion warning device provided by the invention；
Fig. 3 is a kind of circuit diagram of the detection circuit of anti-intrusion warning device provided by the invention；
Fig. 4 is a kind of another circuit diagram of the detection circuit of anti-intrusion warning device provided by the invention.
Specific embodiment
It is an object of the present invention to provide a kind of anti-intrusion warning device and systems, encounter thunder and lightning to avoid anti-intrusion alarm circuit
Weather is damaged, and improves the reliability of alarm system.
To enable above-mentioned purpose of the present invention, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings and specific implementation
Mode is described in further detail this technology invention.
As shown in Figure 1, the present invention provides a kind of anti-intrusion warning device, the warning device includes detector 101, inspection
Slowdown monitoring circuit 102, electro-optical conversion circuit 103, Transmission Fibers 104, photoelectric switching circuit 105 and alarm terminal 106.
The detector 101 is connect with the detection circuit 102, the detector 101 for detecting whether someone invade,
When someone invades, the detector is open circuit, and when nobody invades, the detector is access.
The detection circuit 102 is connect with the electro-optical conversion circuit 103, and the detection circuit 102 is described for detecting
The state of detector 101, and the state of the detector is converted into switching signal, and the switching signal is exported to described
Electro-optical conversion circuit 103.
It is connected between the electro-optical conversion circuit 103 and the photoelectric switching circuit 105 by the Transmission Fibers 104,
The electro-optical conversion circuit 103 is used to the switching signal being converted into optical signal, and the optical signal is passed through the transmission
Optical fiber defeated 104 gives the photoelectric switching circuit 105.
The photoelectric switching circuit 105 is connect with the alarm terminal 106, and the photoelectric switching circuit 105 is used for institute
It states optical signal and is decoded into electric signal, and the electric signal is conveyed to the alarm terminal 106；
The alarm terminal 106 is used to be alarmed according to the electric signal.
Optionally, as shown in Fig. 2, the detection circuit 102 includes window comparator 201 and output relay 202.
The input terminal of the window comparator 201 is connect with the detector 101, the output of the window comparator 201
End is connect with the control terminal of the output relay 202, and the window comparator 202 is used to convert the state of the detector
It is exported into voltage signal, and by the voltage signal to the output relay.
The output terminal of the output relay 202 is connect with the electro-optical conversion circuit 103；The output relay 202
For the voltage signal to be converted into switching signal, and the switching signal is conveyed to the electro-optical conversion circuit 103.
Optionally, the warning device further includes power circuit, the power circuit respectively with detection circuit 102, electric light
Conversion circuit 103 connects, and the power circuit is used to provide power supply for the detection circuit 102, electro-optical conversion circuit 103.
Specifically, power circuit is Voltage stabilizing module including P1 in the Voltage stabilizing module P1, Fig. 3 for exporting burning voltage, use
In AC24V is converted to DC12V.In power circuit, resistance R2, light emitting diode D2 form power indicating circuit.Diode D4,
D5 forms isolation module, and effect is to realize detection circuit and the physical isolation of detector.Resistance R3, R4, varistor RV1,
Capacitance C4 forms lightning-protection module, plays lightning protection.
Optionally, as shown in figure 3, the window comparator 201 includes first resistor R15, second resistance R8,3rd resistor
R7, first comparator U2B and the second comparator U2A.
The first resistor R15, second resistance R8 and 3rd resistor R7 are sequentially connected in series, the first resistor R15's
The other end connects the cathode of power supply, the anode of the other end connection power supply of the 3rd resistor R7；The first resistor R15 and
The common end of two resistance R8 connects the positive input terminal of the first comparator U2B, the second resistance R8 and the 3rd resistor
The negative input end of common end connection the second comparator U2A of R7, the first resistor R15 and second resistance R8 common ends
Voltage is lowest threshold voltage, and the voltage of the second resistance R8 and 3rd resistor R7 common ends is highest threshold voltage.
The concrete mode that the first resistor R15, second resistance R8 and 3rd resistor R7 are sequentially connected in series is：Described
One end of one resistance R15 is connect with one end of the second resistance R8, the other end and the third electricity of the second resistance R8
Hinder one end connection of R7.
Specifically, the window comparator is LM393.
Optionally, the detection circuit further includes end resistance Rx and reference resistance R14.
One end of the reference resistance R14 and the cathode of power supply connect, the other end and the end of the reference resistance R14
Hold one end connection of resistance.
The detector 101 is connected between the other end of the end resistance Rx and the anode of the power supply.
The end resistance is connect with the common end of the reference resistance R14 with the input terminal of the window comparator 201.
When someone invades, and the detector 101 is open circuit or when 101 quilt of the end resistance Rx and the detector
When open circuit destroys, the output voltage of the output terminal of the end resistance Rx and reference resistance R14 is zero, less than the window
The lowest threshold voltage of comparator 201, the window comparator 201 export low level, and the output relay 202 disconnects；Institute
End resistance Rx disconnections or the detector 101 are stated as open circuit, voltage is 0V on reference resistance R14, and window comparator 201 exports
High level, the second triode Q2 conductings, the first triode Q1 cut-offs, output relay RL1 are disconnected.
When the end resistance Rx and the detector 101 are short-circuited destruction, the end resistance Rx and the reference
The output voltage of the common end of resistance R14 is supply voltage, described more than the highest threshold voltage of the window comparator 201
Window comparator 201 exports low level, and the output relay 202 disconnects；At this point, voltage is more than on the reference resistance R14
Highest threshold voltage, the window comparator 201 export high level, the second triode Q2 conductings, and the first triode Q1 is cut
Only, output relay 202 disconnects.
When nobody's invasion and the end resistance Rx and detector 101 no destroyed, the detector 101 is logical
Road, the output voltage of the common end of the end resistance Rx and reference resistance R14 is reference resistance R14 and end resistance Rx
Partial pressure, more than the window comparator 201 lowest threshold voltage and less than the window comparator highest threshold voltage,
The window comparator 201 exports high level, and the output relay 202 is closed.Specifically, the at this point, end resistance Rx
Bleeder circuit is formed with reference resistance R14, the voltage on reference resistance R14 is more than lowest threshold voltage and less than highest threshold value electricity
Pressure, the window comparator export low level, the second triode Q2 cut-offs, and the first triode Q1 is connected, and relay RL1 is closed
It closes.
Optionally, the end resistance Rx is encapsulated in the detector 101.
Optionally, the electro-optical conversion circuit 103 includes LTX-510 electricals to optical converter.
Optionally, the photoelectric switching circuit 105 includes ATX-525 photoelectric converters.
Optionally, the alarm terminal 106 includes alarm and indicator light.
A kind of intrusion preventing alarm system, the alarm system includes multiple anti-intrusion warning devices, specifically, the alarm
System can include 8 or 16 warning devices.
Such as Fig. 4, the present invention also provides another circuit diagram of detection circuit, specially：Detector, end resistance R10
It connects with reference resistance R9, and accesses the common end access window of the anode and cathode of power supply, end resistance R10 and reference resistance R9
The negative input end of mouth comparator；
First resistor R7 and second resistance R8 series connection, the other end of first resistor R7 connect through the anode of diode D1 and power supply
It connects, the other end of second resistance R8 and the collector of triode connect, and the cathode of three emitters taken over and power supply connects, three-level
The base stage of pipe is connect with the pin P2.7 of control chip (AT89S52), the common end and window of first resistor R7 and second resistance R8
The positive input terminal connection of mouth comparator, the output terminal of window comparator control chip with the pin P0.0 of chip is controlled to connect
Pin P1.0 controls output relay through triode Q3；
The level of the pin P2.7 output height variations of the control chip；
The control chip generates control signal according to the level change of pin P0.0, and passes through pin P1.0 control outputs
The open and close of relay.
When nobody's invasion and the end resistance R10 and detector 101 no destroyed, the detector 101 is
Access, the output voltage of the common end of the end resistance R10 and reference resistance R9 is reference resistance R9 and end resistance
The partial pressure (3.4V) of R10, the i.e. voltage of the negative input end of window comparator are 3.4V；When the pin P2.7 of the control chip is defeated
When going out high level, the voltage of the positive input terminal of window comparator is the voltage after first resistor R7 and second resistance R8 partial pressures
(2.3V), less than the voltage (3.4V) of negative input end, window comparator output low level, i.e. pin P0.0 inputs are low level；
When the pin P2.7 of the control chip exports low level, the voltage of the positive input terminal of window comparator be through diode D3,
Resistance R5 and capacitance C6 is depressured filtered voltage (4.3V), and more than the voltage of the negative input end of window comparator, window compares
The output terminal of device is high level, i.e. pin P0.0 input high levels, i.e., when nobody's invasion and the end resistance R10 and detection
When device 101 is without being destroyed, pin P0.0 inputs the level of height variation, pin P1.0 output high level, and output relay closes
It closes.
When someone invades, and the detector 101 is open circuit or when 101 quilt of the end resistance R10 and the detector
When open circuit destroys, the voltage of the common end of the end resistance R10 and the reference resistance R9 is supply voltage, window comparator
Negative input end be supply voltage (5V)；The pin P2.7 output high level or low level, window for controlling chip compare
The voltage of the positive input terminal of device is respectively less than the voltage of negative input end, and window comparator output negative voltage, pin P0.0 is low level,
Pin P1.0 exports low level, and output relay disconnects.
When the end resistance R10 and the detector 101 are short-circuited destruction, the end resistance R10 and the ginseng
The voltage for examining the common end of resistance R9 is 0, at this point, the voltage of the negative input of window comparator is 0, no matter controls chip
Pin P2.7 exports high level or low level, the voltage of the positive input terminal of window comparator are all higher than the voltage of negative input end,
Window comparator exports positive voltage, and pin P0.0 is high level, and pin P1.0 exports low level, and output relay disconnects.
Specifically, the control chip generates control signal according to the level change of pin P0.0, and pass through pin P1.0
The control logic for controlling the open and close of output relay is as shown in table 1：
Table 1
| Pin P0.0 | Failure | Pin P1.0 | Output relay |
| It is high | Short circuit | It is low | It disconnects |
| Height changes | Fault-free is without invasion | It is high | It is closed |
| It is low | Open circuit or invasion | It is low | It disconnects |
The control chip can also generate control signal according to the level of pin P2.7 and P0.0, and pass through pin P1.0
Control the open and close of output relay；Specific control logic, as shown in table 2：
Table 2
According to specific embodiment provided by the invention, the invention discloses following technique effects：
The invention discloses a kind of anti-intrusion warning device and system, the warning device include detector, detection circuit,
Electro-optical conversion circuit, Transmission Fibers, photoelectric switching circuit and alarm terminal convert the electrical signal to light by electro-optical conversion circuit
Signal, and be transmitted using Transmission Fibers, electric signal is converted optical signals to using photoelectric converter in receiving terminal, is connect
Receiving police, avoids electric signal alarm circuit and encounters thunder and lightning weather and be damaged, and improves the reliability of warning device, and expand significantly
The protection distance of alarm system.
The anti-intrusion warning device of the present invention by detector and detection circuit, can by intrusion status, short-circuit collapse state,
Breaking collapse state is converted into switching signal (alarm signal), realizes the alarm to invasion, short circuit and open circuit, meets security protection
Standard requirement.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
Specific case used herein is expounded technical principle, embodiment, and the explanation of above example is
In order to help to understand the technology of the present invention method and core concept, the embodiment of description is only a example of the present invention, is not all of
Embodiment.Based on the embodiment of the present invention, what those of ordinary skill in the art were obtained without making creative work
Every other embodiment, belongs to the scope of the present invention.
Claims (10)
1. a kind of anti-intrusion warning device, which is characterized in that the warning device includes detector, detection circuit, electro-optic conversion
Circuit, Transmission Fibers, photoelectric switching circuit and alarm terminal；
The detector is connect with the detection circuit, the detector for detecting whether someone invade, when someone invades,
The detector is open circuit, and when nobody invades, the detector is access；
The detection circuit is connect with the electro-optical conversion circuit, and the detection circuit is used to detect the state of the detector,
And the state of the detector is converted into switching signal, and the switching signal is exported to the electro-optical conversion circuit；
It is connected between the electro-optical conversion circuit and the photoelectric switching circuit by the Transmission Fibers, the electro-optic conversion electricity
Road is used to the switching signal being converted into optical signal, and the optical signal is conveyed to the photoelectricity by the Transmission Fibers
Conversion circuit；
The photoelectric switching circuit is connect with the alarm terminal, and the photoelectric switching circuit is used to the optical signal being decoded into
Electric signal, and the electric signal is conveyed to the alarm terminal；
The alarm terminal is used to be alarmed according to the electric signal.
2. anti-intrusion warning device according to claim 1, which is characterized in that the detection circuit includes window comparator
And output relay；
The input terminal of the window comparator is connect with the detector, the output terminal of the window comparator with it is described output after
The control terminal connection of electric appliance, the window comparator are used to the state of the detector is converted into voltage signal, and by described in
Voltage signal is exported to the output relay；
The output terminal of the output relay is connect with the electro-optical conversion circuit；The output relay is used for the voltage
Signal is converted into switching signal, and the switching signal is conveyed to the electro-optical conversion circuit.
3. anti-intrusion warning device according to claim 2, which is characterized in that the warning device further includes power supply electricity
Road, the power circuit are connect respectively with the detection circuit, the electro-optical conversion circuit, and it is described that the power circuit, which is used for,
Detection circuit, the electro-optical conversion circuit provide power supply.
4. anti-intrusion warning device according to claim 3, which is characterized in that the window comparator includes the first electricity
Resistance, second resistance and 3rd resistor, first comparator and the second comparator；
The first resistor, second resistance and 3rd resistor are sequentially connected in series, the other end connection power supply of the first resistor
Cathode, the 3rd resistor the other end connection power supply anode；The first resistor is connected with the common end of second resistance
The positive input terminal of the first comparator, the second resistance and the common end of the 3rd resistor connect second comparator
Negative input end, the voltage of the first resistor and second resistance common end is lowest threshold voltage, the second resistance and the
The voltage of three resistance common ends is highest threshold voltage.
5. anti-intrusion warning device according to claim 4, which is characterized in that the detection circuit further includes end resistance
And reference resistance；
One end of the reference resistance and the cathode of power supply connect, the other end of the reference resistance and the one of the end resistance
End connection；
The detector is connected between the other end of the end resistance and the anode of the power supply；
The common end of the end resistance and the reference resistance is connect with the input terminal of the window comparator；
When someone invades, and the detector is open circuit or when the end resistance and the detector are switched off destroying, institute
The output voltage for stating end resistance and the output terminal of the reference resistance is zero, less than the lowest threshold electricity of the window comparator
Pressure, the window comparator export low level, and the output relay disconnects；
When the end resistance and the detector are short-circuited destruction, the common end of the end resistance and the reference resistance
Output voltage for supply voltage, more than the highest threshold voltage of the window comparator, the window comparator exports low electricity
Flat, the output relay disconnects；
When nobody invasion and the end resistance and detector not be destroyed when, the detector be access, the end
Resistance and the output voltage of the common end of the reference resistance are partial pressure of the reference resistance in series circuit, more than the window
The lowest threshold voltage of comparator and the highest threshold voltage for being less than the window comparator, the high electricity of window comparator output
Flat, the output relay is closed.
6. anti-intrusion warning device according to claim 5, which is characterized in that the end resistance is encapsulated in the detection
In device.
7. anti-intrusion warning device according to claim 1, which is characterized in that the electro-optical conversion circuit includes LTX-
510 electricals to optical converter.
8. a kind of anti-intrusion warning device according to claim 1, which is characterized in that the photoelectric switching circuit includes
ATX-525 photoelectric converters.
9. a kind of anti-intrusion warning device according to claim 1, which is characterized in that the alarm terminal includes alarm
And indicator light.
10. a kind of intrusion preventing alarm system, which is characterized in that the alarm system includes multiple claim 1-9 any one
The anti-intrusion warning device.
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| CN201810011269.8A CN108230595B (en) | 2018-01-05 | 2018-01-05 | Intrusion prevention alarm device and system |
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| CN201810011269.8A CN108230595B (en) | 2018-01-05 | 2018-01-05 | Intrusion prevention alarm device and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109035728A (en) * | 2018-09-11 | 2018-12-18 | 厦门立林科技有限公司 | A kind of anti-camouflage formula intrusion alarm system |
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