CN107180508A - A kind of system and method for alarm defence area multiplication - Google Patents
A kind of system and method for alarm defence area multiplication Download PDFInfo
- Publication number
- CN107180508A CN107180508A CN201710361700.7A CN201710361700A CN107180508A CN 107180508 A CN107180508 A CN 107180508A CN 201710361700 A CN201710361700 A CN 201710361700A CN 107180508 A CN107180508 A CN 107180508A
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- Prior art keywords
- resistance
- defence area
- alarm
- signal
- tamper
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B19/00—Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
Abstract
The present invention provides a kind of system and method for alarm defence area multiplication, the control keyboard being connected including alarm host machine and respectively with the alarm host machine and some defence areas, the defence area includes defence area loop and some signal normal-closed ends, the signal normal-closed end connects the defence area loop, the defence area loop is sequentially ingressed into a resistance by the adjacent signal normal-closed end, the signal normal-closed end of the resistance both sides connects the alarm host machine, and the judgement to two kinds of signals of detector is realized using the circuit resistance of different times in circuit.The present invention realizes two kinds of signals of alarm and tamper of Division identification detector simultaneously, cost is low and can reach the defence area utilization rate of maximum when alarm host machine accesses detector.
Description
Technical field
The invention belongs to warning system technical field, and in particular to a kind of system and method for alarm defence area multiplication.
Background technology
In warning system, front-end detector has two kinds of signal outputs, and one is alarm signal, and two be tamper signal, if by two
Plant signal and access alarm host machine, current two kinds of signals of Division identification have following settling mode：
First, two signals are respectively connected to a defence area, then each detector is accomplished by taking two defence areas, visits
Survey after device is disassembled, can navigate to which specific detector, but the defence area quantity of warning system access will reduce one times, and
Each detector is needed to utilize 6 coring circuits, and cost certainly will be doubled；
Second, in order to ensure the maximum utilization rate in alarm host machine defence area, by the tamper signal of all detectors and access
Among one defence area, after such defence area only takes up a defence area, but detector is disassembled, it is impossible to navigate to it is specific which visit
Device is surveyed, and same each detector needs to utilize 6 coring circuits, cost increase.
Patent Serial defense area expander (publication number：CN1199881 one kind) is disclosed for expanded series burglar alarm control
The defence area number of device processed and support the use, the defence area number such as 4.8.12.16 is extended to any defence area of alarm controller, this
Sample according to user need any plus-minus defence area number, so as in constituting, large-scale crime prevention system.Although this patent adds anti-
Area's quantity, alarm and two kinds of signals of tamper in defence area can not be really recognized simultaneously, prevent the defence area that warning system is accessed from reaching most
Big utilization rate.
A kind of defence area input circuit (publication number of warning system of patent：CN203606935U) disclose a kind of including collection
Input circuit, the collection input circuit is by defence area inputs Z1-IN ends, RC filter circuits, to be transported to AD Acquisition Circuit OUT defeated
Go out end composition, diode D1, the RC provided with protection Acquisition Circuit between the defence area input Z1-IN ends and RC filter circuits
Resistance R2, the resistance R2 are connected on filter circuit and connects VCC ends, the defence area input Z1-IN external resistance MOV1 in end is arrived
Ground.The AD Acquisition Circuit that this utility model is carried using chip, gathers defence area voltage, reduces peripheral cell, reduces failure
Point, it is cost-effective, but can only achieve the effect of convenient collection defence area voltage, it is impossible to alarm and tamper in identification measurement defence area
Two kinds of signals.
The content of the invention
To overcome drawbacks described above, the present invention provides a kind of system and method for alarm defence area multiplication, when alarm host machine access
During detector, two kinds of signals of alarm and tamper of Division identification detector simultaneously are realized, cost is low and can reach the defence area of maximum
Utilization rate.
The invention provides following technical scheme：
A kind of system of alarm defence area multiplication, including alarm host machine and the operating key that is connected respectively with the alarm host machine
Disk and some defence areas, the defence area include defence area loop and some signal normal-closed ends, and the signal normal-closed end connects the defence area
Loop, the defence area loop is sequentially ingressed into a resistance, the letter of the resistance both sides by the adjacent signal normal-closed end
Number normal-closed end connects the alarm host machine；
The defence area loop includes defence area sample circuit, input voltage of the defence area sample circuit to the defence area loop
Carry out sampled measurements and obtain sampled voltage signal；
The alarm host machine obtains the sampled voltage signal by the signal normal-closed end, so as to the defence area loop
Termination resistance judged, differentiation is identified to alarm signal and tamper signal by the judgement of the termination resistance；
The control keyboard, for display alarm information, tamper information and anti-area code.
It is preferred that, the signal normal-closed end includes warning end and tamper end, the warning end and tamper end connection institute
Defence area loop is stated, the resistance includes first resistor and second resistance, and the warning end includes the first warning end and the second alarm
End, accesses the first resistor between first warning end and second warning end, the tamper end includes the first tamper
End and the second tamper end, access the second resistance, first report between second warning end and the first tamper end
Alert end and the second tamper end connect the alarm host machine respectively, are realized by normal-closed end output signal to defence area loop
Termination resistance judges.
It is preferred that, the defence area includes door sensor and some infrared detectors, and the door sensor also includes idle end, described first
Resistance is accessed between the idle end and first warning end, and the second resistance accesses first warning end and described
Between second warning end, the idle end and second warning end connect the alarm host machine respectively, by measuring the door
The termination resistance in the loop of magnetic judges the alarm signal and tamper signal of the door sensor.
It is preferred that, the infrared detector also includes supply terminals, and the supply terminals connects the alarm host machine,
Detector is powered.
It is preferred that, the defence area sample circuit includes input voltage sample circuit, reference resistance unit, the electricity being sequentially connected
Protection circuit and driving voltage sample circuit, are accessed between the input voltage sample circuit and the reference resistance unit
Terminal resistance binding post, measures input voltage by this defence area sample circuit and is sampled, so that it is determined that terminal resistance
Resistance.
It is preferred that, the input voltage sample circuit includes eight tunnels analogies and switchs and switched with eight tunnels analogy
Single-chip microcomputer, input voltage circuit and the power circuit of interconnection, the input/output interface connection of the eight tunnels analogies switch
There is 3rd resistor, the other end of the 3rd resistor connects the resistance, the input/output interface of the eight tunnels analogies switch
The 4th resistance is accessed between the 3rd resistor, the eight tunnels analogies switch is by single-chip microcomputer control successively circulation pair
Each input circuit sampling, 3rd resistor and the 4th resistance are realized and input voltage partial pressure are sampled.
It is preferred that, the power protecting circuit includes the 5th resistance and diode for being sequentially connected in series access driving voltage, institute
The other end for stating diode connects the driving voltage sample circuit and the reference resistance unit, the reference resistance respectively
A discharge tube is accessed between unit and the driving voltage sample circuit, prevents external high pressure from entering.
It is preferred that, the driving voltage sample circuit include series connection the 6th resistance and the 7th resistance, the 6th resistance it is another
One end connects the power protecting circuit, the other end ground connection of the 7th resistance, the 6th resistance and the 7th resistance
Between access reference voltage, the two ends parallel connection access current protecting circuit of the 7th resistance prevents exciting current excessive.
A kind of method of alarm defence area multiplication, comprises the following steps：
S1：A resistance, detector end output two are accessed in the defence area loop of warning system by the signal normal-closed end of detector
Individual normally closed signal is to alarm host machine；
S2：The input voltage in the defence area loop is sampled using the defence area sample circuit in defence area loop described in S1
Measurement obtains sampled voltage signal；
S3：The alarm host machine obtains the sampled voltage signal described in S2 by the normally closed signal described in S1, so that
The termination resistance in the defence area loop is judged, by the judgement of the termination resistance to alarm signal and tamper signal
Differentiation is identified；
S4：The alarm host machine is connected with control keyboard, and the alarm signal described in S3 and tamper signal are shown.
The beneficial effects of the invention are as follows：Using the terminal resistance in the loop of defence area, the judgement to two kinds of unlike signals is realized,
The limitation that each coring circuit of detector 6 accesses defence area is changed, i.e., can be completed using 4 coring circuits, reduce the use of wire rod
Cost；The tamper signal of detector is accessed without the need for extra defence area, 100% defence area utilization rate is reached.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for specification, the reality with the present invention
Applying example is used to explain the present invention together, is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is present system structural representation；
Fig. 2 is connection principle schematic diagram of the present invention；
Fig. 3 is sample circuit principle schematic in defence area of the present invention；
Fig. 4 is the actual defence area sample circuit schematic diagram of the present invention；
Marked in figure：1. alarm host machine；2. door sensor；21. idle end；3. infrared detector；31. warning end；32. it is anti-
Tear end open；33. supply terminals；4. input voltage sample circuit；5. terminal resistance binding post；6. reference resistance unit；7. electricity
Protection circuit；8. driving voltage sample circuit；R126. 3rd resistor；R41. the 4th resistance；R38. the 5th resistance；R125.
6th resistance；R40. the 7th resistance；D12. diode.
Embodiment
As depicted in figs. 1 and 2, the system of a kind of alarm defence area multiplication, including alarm host machine 1 and respectively with alarm host machine
The control keyboard of 1 connection and defence area, defence area include defence area loop and signal normal-closed end, and signal normal-closed end connection defence area loop is prevented
Area loop is sequentially ingressed into 2K Ω resistance, the signal normal-closed end connection alarm of 2K Ω resistance both sides by adjacent signal normal-closed end
Main frame 1；Defence area loop includes defence area sample circuit, and defence area sample circuit carries out sampled measurements to the input voltage in defence area loop
Obtain sampled voltage signal；Alarm host machine 1 obtains sampled voltage signal by signal normal-closed end, so as to the end in defence area loop
End resistance value is judged, differentiation is identified to alarm signal and tamper signal by the judgement of termination resistance；Control keyboard,
For display alarm information, tamper information and anti-area code, realize that warning system can the alarm of Division identification detector simultaneously and anti-
Tear two kinds of signals open.
As shown in figure 1, signal normal-closed end includes warning end 31 and tamper end 32, warning end 31 and the connection defence area of tamper end 32
Loop, 2K Ω resistance includes the first 2K Ω resistance and the 2nd 2K Ω resistance, and warning end 31 includes the first warning end and the second alarm
End, accesses the first 2K Ω resistance between the first warning end and the second warning end, tamper end 32 includes the first tamper end and second and prevented
Tear end open, the 2nd 2K Ω resistance is accessed between the second warning end and the first tamper end, the first warning end and the second tamper end connect respectively
Main frame 1 taking alarm, is realized by normal-closed end output signal and the termination resistance in defence area loop is judged.Defence area includes door sensor 2 and red
External detector 3, door sensor 2 is also included between idle end 21, the idle warning end of end 21 and first of the first 2K Ω resistance access, and second
2K Ω resistance is accessed between the first warning end and the second warning end, and the idle warning end of end 21 and second connects alarm host machine respectively
1, the alarm signal and tamper signal of door sensor 2 are judged by measuring the termination resistance in loop of door sensor 2.Further, infrared spy
Surveying device 3 also includes supply terminals 33, and supply terminals 33 connects the AUX ports of alarm host machine 1, detector is powered.
As shown in figure 3, the present invention measures input voltage by ADC, R4, R5 sample to input voltage vin partial pressure, obtained
Sampled voltage Vsam, reference voltage network is made up of R2, R3.Power supply in storage battery power supply voltage change range more than 30%,
So reference voltage Vref is supplied directly to ADC reference edge, it is to avoid driving voltage Vexc changes produce influence to measurement.Survey
Amount process is as follows： By (1),
(2), (3) formula can obtain R1 resistances, thenIf divider resistance R2/R3 and R4/R5 ratio is identical,
Above formula is reduced toIf then Vsam=0, Rin short circuit；Vsam=Vref, Rin open circuits.Rin is defence area loop
Terminal resistance, judges it is alarm circuit or tamper loop, such as according to obtained resistanceDefence area is ready
State,OrFor alarm condition, then display alarm information and anti-area code on control keyboard；7R1
<RinFor tamper, then tamper information and anti-area code are shown on control keyboard, i.e., different type loop can be shown by keyboard
The information content.
As shown in figure 4, this circuit is actual defence area sampling principle figure, altogether comprising 8 defence areas, R10 is 2K reference resistances,
J4 is the external terminal resistance of binding post, and R125 and R40 sample to driving voltage, and R126 and R41 sample to input voltage.U9
Switched for 8 tunnels analogies, circulated successively by single-chip microcomputer control and each input circuit is sampled, D12, R15, G2 constitutes power supply and protected
Protection circuit, prevents external high pressure from entering.
As shown in Figure 3 and Figure 4, defence area sample circuit includes input voltage sample circuit 4, the 2K Ω benchmark electricity being sequentially connected
Hinder unit 6, power protecting circuit 7 and driving voltage sample circuit 8, input voltage sample circuit 4 and 2K Ω reference resistance units
Access terminal resistor wiring terminal 5 between 6, measures input voltage by this defence area sample circuit and is sampled, so that it is determined that
The resistance of terminal resistance.Input voltage sample circuit 4 includes eight tunnels analogies and switchs and mutually interconnected with eight tunnels analogies switch
Single-chip microcomputer, input voltage circuit and the power circuit connect, the input/output interface of eight tunnels analogies switch is connected with resistance
R126, resistance R126 other end connection 2K Ω resistance, between the input/output interface and resistance R126 of eight tunnels analogies switch
Resistance R41 is accessed, eight tunnels analogies switch is circulated successively by single-chip microcomputer control samples to each input circuit, and R126 and R41 are real
Now input voltage partial pressure is sampled.Power protecting circuit 7 includes the resistance R38 and diode for being sequentially connected in series access driving voltage
D12, diode the D12 other end connect driving voltage sample circuit 8 and 2K Ω reference resistances unit 6,2K Ω benchmark electricity respectively
A discharge tube is accessed between resistance unit 6 and driving voltage sample circuit 8, prevents external high pressure from entering.Driving voltage sample circuit
8 include the resistance R125 and resistance R40 of series connection, and the resistance R125 other end connects power protecting circuit 7, and resistance R40's is another
End ground connection, accesses reference voltage between resistance R125 and resistance R40, resistance R40 two ends parallel connection accesses current protecting circuit,
Prevent exciting current excessive.
A kind of method of alarm defence area multiplication, comprises the following steps：
S1：2K Ω resistance, the output of detector end are accessed in the defence area loop of warning system by the signal normal-closed end of detector
Two normally closed signals are to alarm host machine；
S2：Sampled measurements are carried out using the defence area sample circuit in defence area loop in S1 to the input voltage in defence area loop to obtain
Sampled voltage signal；
S3：Alarm host machine obtains the sampled voltage signal in S2 by the normally closed signal in S1, so as to defence area loop
Termination resistance is judged, differentiation is identified to alarm signal and tamper signal by the judgement of termination resistance；
S4：Alarm host machine is connected with control keyboard, and the alarm signal in S3 and tamper signal are shown.
As Figure 1-Figure 4, when detector end is exported in two normally closed signals, access warning system, defence area loop is utilized
In defence area resistance, by realizing signal identification to the judgement of circuit resistance in loop.2 2K Ω resistance are accessed in defence area, are returned
Lu Zhong, when defence area resistance is in the range of 2K Ω ± 20%, the detector belongs to normal operating conditions, when detector is triggered, report
When alert end is changed into 4K Ω -10K Ω from the closed circuit resistance being changed into open circuit, defence area, system identification is to system circuit resistance
During 4K Ω, system is defined as detector alarm signal；When detector is disassembled, the resistance in defence area is changed into ∞, system
When recognizing system circuit resistance for ∞, system is defined as detector tamper signal.The present invention is that a kind of warning system passes through reality
When monitoring detector loop in resistance, realized using the circuit resistance of different times in circuit to two kinds of detector
The determination methods of signal.Warning system real-time monitoring system loop resistance value, it is real using 4K Ω -10K Ω and ∞ two kinds of resistances
Now to the judgement of two kinds of unlike signals, the limitation that each coring circuit of detector 6 accesses defence area is changed, i.e., is using 4 coring circuits
It can complete, reduce the use cost of wire rod, the tamper signal of detector is accessed without the need for extra defence area, is reached
100% defence area utilization rate.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, although with reference to foregoing reality
Apply example the present invention is described in detail, for those skilled in the art, it still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic.All essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (9)
1. a kind of system of alarm defence area multiplication, it is characterised in that connect including alarm host machine and respectively with the alarm host machine
The control keyboard connect and some defence areas, the defence area include defence area loop and some signal normal-closed ends, and the signal normal-closed end connects
The defence area loop is connect, the defence area loop is sequentially ingressed into a resistance, the resistance two by the adjacent signal normal-closed end
The signal normal-closed end of side connects the alarm host machine；
The defence area loop includes defence area sample circuit, and the defence area sample circuit is carried out to the input voltage in the defence area loop
Sampled measurements obtain sampled voltage signal；
The alarm host machine obtains the sampled voltage signal by the signal normal-closed end, so as to the end in the defence area loop
End resistance value is judged, differentiation is identified to alarm signal and tamper signal by the judgement of the termination resistance；
The control keyboard, for display alarm information, tamper information and anti-area code.
2. the system of a kind of alarm defence area multiplication according to claim 1, it is characterised in that the signal normal-closed end includes
Warning end and tamper end, the warning end and the tamper end connect the defence area loop, the resistance include first resistor and
Second resistance, the warning end includes the first warning end and the second warning end, first warning end and second warning end
Between access the first resistor, the tamper end includes the first tamper end and the second tamper end, second warning end and institute
State and access the second resistance between the first tamper end, first warning end and the second tamper end connect the report respectively
Alert main frame.
3. a kind of system of alarm defence area multiplication according to claim 2, it is characterised in that the defence area include door sensor and
Some infrared detectors, the door sensor also includes idle end, and the first resistor accesses the idle end and first alarm
Between end, the second resistance is accessed between first warning end and second warning end, the idle end and described the
Two warning ends connect the alarm host machine respectively.
4. the system of a kind of alarm defence area multiplication according to claim 3, it is characterised in that the infrared detector is also wrapped
Supply terminals is included, the supply terminals connects the alarm host machine.
5. a kind of system of alarm defence area multiplication according to claim 1, it is characterised in that the defence area sample circuit bag
The input voltage sample circuit being sequentially connected, reference resistance unit, power protecting circuit and driving voltage sample circuit are included, it is described
Access terminal resistor wiring terminal between input voltage sample circuit and the reference resistance unit.
6. a kind of system of alarm defence area multiplication according to claim 5, it is characterised in that the input voltage sampling electricity
Road includes eight tunnels analogies and switchs and switch the single-chip microcomputer, input voltage circuit and the electricity that are connected with each other with eight tunnels analogy
Source circuit, the input/output interface of the eight tunnels analogies switch is connected with 3rd resistor, and the other end of the 3rd resistor connects
The resistance is connect, the 4th resistance, institute are accessed between the input/output interface and the 3rd resistor of the eight tunnels analogies switch
Eight tunnels analogies switch is stated to be circulated successively to the sampling of each input circuit by single-chip microcomputer control.
7. a kind of system of alarm defence area multiplication according to claim 5, it is characterised in that the power protecting circuit bag
The 5th resistance and diode for being sequentially connected in series access driving voltage are included, the other end of the diode connects the excitation electricity respectively
Sample circuit and the reference resistance unit are pressed, one is accessed between the reference resistance unit and the driving voltage sample circuit
Discharge tube.
8. a kind of system of alarm defence area multiplication according to claim 5, it is characterised in that the driving voltage sampling electricity
Road includes the 6th resistance and the 7th resistance of series connection, and the other end of the 6th resistance connects the power protecting circuit, the described 7th
The other end ground connection of resistance, accesses reference voltage, the two of the 7th resistance between the 6th resistance and the 7th resistance
End access current protecting circuit in parallel.
9. a kind of method of alarm defence area multiplication, comprises the following steps：
S1：A resistance is accessed in the defence area loop of warning system by the signal normal-closed end of detector, and detector end exports two often
Signal is closed to alarm host machine；
S2：Sampled measurements are carried out to the input voltage in the defence area loop using the defence area sample circuit in defence area loop described in S1
Obtain sampled voltage signal；
S3：The alarm host machine obtains the sampled voltage signal described in S2 by the normally closed signal described in S1, so as to institute
The termination resistance for stating defence area loop is judged, alarm signal and tamper signal are known by the judgement of the termination resistance
Do not distinguish；
S4：The alarm host machine is connected with control keyboard, and the alarm signal described in S3 and tamper signal are shown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710361700.7A CN107180508A (en) | 2017-05-22 | 2017-05-22 | A kind of system and method for alarm defence area multiplication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710361700.7A CN107180508A (en) | 2017-05-22 | 2017-05-22 | A kind of system and method for alarm defence area multiplication |
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| Publication Number | Publication Date |
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| CN107180508A true CN107180508A (en) | 2017-09-19 |
Family
ID=59832253
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710361700.7A Pending CN107180508A (en) | 2017-05-22 | 2017-05-22 | A kind of system and method for alarm defence area multiplication |
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Cited By (1)
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| CN111489531A (en) * | 2019-01-29 | 2020-08-04 | 杭州海康威视数字技术股份有限公司 | Method for adapting to line tail resistance of alarm host, electronic device and storage medium |
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Application publication date: 20170919 |