CN103530997A - Fire alarm control system and control method thereof - Google Patents
Fire alarm control system and control method thereof Download PDFInfo
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Abstract
The invention relates to a fire alarm control system and a control method thereof. The fire alarm control system comprises a host unit, a battery unit, a direct control unit and a loop unit adopting a two-bus mode, wherein the loop unit comprises a switching circuit, a pulse modulation circuit, a return code current circuit, an analog-to-digital converter and field equipment. With the adoption of the fire alarm control system and the control method thereof, the problems that numerous multi-wire transmission lines exist and have high total failure rate and longer alarm time in the prior art are solved; and a digitized and non-polarized two-bus mode which is developed independently and integrates power supply, communication, control and alarm, so that the judgment for an alarming address only requires 8 ms on the premise that the baud rate is not increased, fire alarm information can be reported simultaneously in 2 seconds even through 255 detection points upload fire alarm information in the same polling period, and accordingly, the response time of fire alarm is shortened greatly.
Description
Technical field
The present invention relates to a kind of alarm control system, specifically a kind of fire alarm control system and control method thereof, belong to fire prevention field.
Background technology
Fire is one of common disaster, and its loss causing is huge, if can find in time and process as early as possible, loss can be reduced greatly.Therefore for region division fire detecting arrangement and the warning device of potential fire risk, at fire early period of origination or may form fire time, by fire detecting arrangement detect can suspect signal after, by warning device, carry out alarm, so that related personnel can process in time, will lose as far as possible and reduce.
After being provided with at the scene numerous detections and warning device, for the ease of management and control, the mode by all fire alarm installations by data communication is connected in control system, has formed fire alarm control system.In fire alarm control system, the signal that can return according to each on-the-spot fire detecting arrangement is monitored scene, when there is suspicious situation, control system is reported to the police by warning device, fire alarm control system can effectively judge on-the-spot Fires Occurred, by the mode of real-time monitoring, processes in time the condition of a disaster.
Fire alarm control unit is the heart of automatic fire alarm system, can power to detector, has following function: 1) be used for receiving fire signal and start fire alarm installation.This equipment also can be used to indicate fire position and record for information about.2) can start fire alarm signal or start self-extinguishing equipment and fire protection linkage control equipment by automatic fire control fire control unit by fire alarm dispensing device.3) the automatically true(-)running of surveillance and to specific fault spoken, light reports to the police.
Modern fire alarm control unit is in order to reduce wrong report, facilitate installation and debugging, reduce I&M expense, reduce connecting line number, the accurate location (position numbering) of knowing timely and accurately the fire detector that sends warning, all generally adopts pulse-code-odulation system, forms the bus structure of few line system, by microcomputer or one-chip computer, as master control core cell, be equipped with storer and digital interface device etc.Therefore modern alarm controller has stronger resisting in the ability of disturbing and flexible adaptability to changes.
The code detector that fire alarm control unit is constantly surveyed position to each sends coded pulse signal.When this signal and the detector of a part are encoded when identical, explorer response, return message, judges that whether this position is normal.If normal, the detector that main frame (cpu) continues to patrol and examine other position; If undesired, judgement is fault-signal or fire alarm, sends corresponding sound, visual alarm, and sends alerting signal to concentrated alarm controller.
As China Patent No. to be CN1125421C disclose in " a kind of two-bus communication and use the fire alarm system of the method " a kind of to fire fast response two-bus communication and adopt the fire alarm system of the method.The process that realizes response is fast by the addressed location grouping in each detection bus loop, when thering is the addressed location of fire alarm interrupt priority, produce after fire alarm, on the correspondence position of signaling position, by two buses, to alarm controller, return group number pulse, on returning code bit correspondence position, in passback group, number pulse, alarm controller calculates address number and the alarm of the addressed location that produces fire signal according to numbering in group number and group.
But in this invention, judge that a warning address just at least needs 50ms, when there is many alarm set points of N, controller just needs N * 50ms to process judgement warning address, needs the time longer, is unfavorable within the shortest time and alarm.
Summary of the invention
The present invention will solve multiple-way system transmission line of the prior art and have the problem that quantity is large, total failure rate is high, time of fire alarming is longer, the power supply that the present invention adopts independent research with communicate by letter, control and report to the police in nonpolarity two bus modes of digitizing of one, do not improving under the prerequisite of baud rate, judge a warning address as long as 8ms, even if provide a kind of has 255 sensing points to upload fire alarm information also can to realize within 2 second time and quoting, greatly improve fire alarm control system and the control method thereof of the response time of fire alarm in same polling period simultaneously
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
, comprising:
Main computer unit, described main computer unit sends address pulse signal and command pulse signal, and receives the digital signal of feedback, and signal is processed and each unit is controlled;
Battery unit, is connected with main computer unit, gives system power supply;
Straight control unit, is connected respectively with field apparatus with main computer unit, according to the instruction of described main computer unit, directly controls field apparatus;
Also comprise the circuit units that adopts two bus modes, described circuit units comprises on-off circuit, pulse modulated circuit, returns code current circuit, analog to digital converter, field apparatus;
On-off circuit, is connected with the output of pulse signal pin of described main computer unit by negater circuit, and is connected with two bus high level lines, and the field apparatus in two buses sends address pulse signal, and working power is provided;
Pulse modulated circuit, is connected with the command pulse signal output pin of described main computer unit by negater circuit, and is connected with two bus high level lines, and the field apparatus in two buses sends command pulse signal;
Return code current circuit; comprise high-side current mapping circuit, low side sample circuit and amplifying circuit; described high-side current mapping circuit is connected respectively with low level line with two bus high level lines; described low side sample circuit is connected with the low level line of described two buses, and described high-side current mapping circuit is connected with amplifying circuit after adopting circuit to be connected with described low side;
Analog to digital converter, is connected respectively with main computer unit with described time code current circuit, and the signal of described time decoding circuit is carried out inputting main computer unit after analog to digital conversion;
Field apparatus, is connected with low level line with the high level line of two buses, receives the signal in two buses.
Described circuit units also comprises pulse shaping circuit, is connected with pulse modulated circuit with described on-off circuit, will after described command pulse signal and address pulse signal shaping, export to field apparatus; Also comprise short-circuit detecting circuit, be connected respectively with described analog to digital converter with described two bus high level lines, detect the electric signal of described two buses and input described analog to digital converter; In described short-circuit detecting circuit, be provided with short circuit indicating device, when being short-circuited state, indicate.
Described circuit units, directly control unit, main computer unit connects by CAN bus.
Also comprise multicomputer net unit, described fire alarm control system can be realized a plurality of fire alarm control system networkings by multicomputer net unit and work.
Also comprise linkage unit, described linkage unit is also connected with CAN bus, and the start and stop key in described linkage unit can be associated with any one or one group of bus field apparatus by definition, completes the on off control to this bus field apparatus.
Also comprise communication processing unit, described communication processing unit is divided into internal communication unit and outer set net communication unit, described internal communication unit by two bus communication modes and described circuit units, directly control unit, linkage unit and main computer unit and carry out communication, described outer set net communication unit is by two bus communication modes and other fire alarm control system networking communications.
Described communication processing unit adopts CAN communication controller and CAN bus transceiver, and the two ends of described CAN bus transceiver are respectively equipped with two resistance, and the resistance input end of described CAN bus transceiver is connected with slope resistance.
Described straight control unit adopts two-wire system communication, and is provided with manual output control model and automatic linkage output mode.
Also comprise man-machine conversation unit, described man-machine conversation unit comprises liquid crystal display, keyboard, hummer, LED light, printer, touch-screen, loudspeaker.
Described on-off circuit comprises the first NAND gate circuit U2A, its first input end is connected with the address pulse signal output pin of main computer unit in described circuit units, describedly be connected with its first input end with the second input end of the first NAND gate circuit U2A, it is described on-off circuit input end that the output terminal of described the first Sheffer stroke gate U2A is connected to resistance R 5 one end, the other end of described resistance R 5 is connected to the base stage of triode T2, the collector of described triode T2 is connected to the base stage of power switch pipe T1 by resistance R 4, the collector of described power switch pipe T1 is connected with two bus high level line L+, the emitter of described power switch pipe T1 is connected with its base stage by resistance R 3, the emitter of described power switch pipe T1 is also connected with external 24V power supply.
Described pulse modulated circuit comprises the second Sheffer stroke gate U3A, its first input end is connected with the command pulse signal output pin of described main computer unit, the second input end of described the second Sheffer stroke gate U3A is connected with its first input end, the output terminal of described the second Sheffer stroke gate U3A is connected with one end of resistance R 10, the other end of described resistance R 10 is connected to the base stage of triode T5, the collector of described triode T5 is connected to external 24V power supply by resistance R 11, described external 24V power supply is also connected to the input end of three-terminal voltage-stabilizing pipe T11, the collector of described triode T5 is also connected to the base stage of triode T6, the emitter of described triode T6, after one end parallel connection of one end of resistance R 12 and capacitor C 2, be connected with the emitter of triode T5, the collector of described triode T6, after the other end parallel connection of the other end of resistance R 12 and capacitor C 2, be connected to the adjustment end of three-terminal voltage-stabilizing pipe T11, resistance R 13 is connected to the output terminal of three terminal regulator T11 and adjusts between end, the output terminal of described three terminal regulator T11 is also by the resistance R 15 of connecting successively, R16 is connected to the anode of diode D1, the negative electrode of described diode D1 is connected to the high level line L+ of two buses.
High-side current mapping circuit described in described time code current circuit is connected with two bus two ends, in described high-side current mapping circuit, the collector of triode T7 is connected with the low level line L-of described two buses, the emitter of described triode T7 is connected between resistance R 15 and the output terminal of three-terminal voltage-stabilizing pipe T11 by resistance R 14, the base stage of described triode T7 is connected with the output terminal of operational amplifier U4A, the reverse input end of described operational amplifier U4A is connected with the emitter of triode T7, the positive input of described operational amplifier U4A is connected between resistance R 15 and R16, the plus earth of described operational amplifier, its negative pole connects external 24V power supply, the positive input that the low level line L-of described two buses is also operational amplifier U4B with the input end of amplifying circuit is connected, described low side sample circuit is sampling resistor R19, after the anode of one end of described sampling resistor R19 and electric capacity D2 is in parallel, be connected to the positive input of described operational amplifier U4B, after the negative electrode of the other end of sampling resistor R19 and electric capacity D2 is in parallel, by resistance R 18, be connected to the input end anyway of described operational amplifier U4B, the point ground connection in parallel of described resistance R 18 and R19, resistance R 17 is connected to the output terminal of operational amplifier U4B and anyway between input end, the output terminal of described operational amplifier U4B is the output terminal of described amplifying circuit, it is connected to the IN0 input end of analog to digital converter U1.
Described pulse shaping circuit comprises resistance R 7, one end of described resistance R 7 is connected with the output terminal of described the second Sheffer stroke gate U3A, the output terminal of described the first NAND gate circuit U2A is one end of contact resistance R6 also, after the other end parallel connection of described resistance R 7 and R6, be connected with the base stage of triode T4, the parallel connection point of the emitter of described triode T4 and the emitter of triode T3 is connected and ground connection with the emitter of triode T2, after the base stage of the collector of described triode T4 and triode T3 is in parallel, by resistance R 8, be connected to two bus high level line L+, the collector of described triode T3 is connected to two bus high level line L+ by resistance R 9.
The input end of described short-circuit detecting circuit is that one end of resistance R 1 and the IN1 input end of described analog to digital converter U1 are connected, the other end of described resistance R 1 is connected to short circuit indicating device, described short circuit indicating device is luminotron L1, the negative electrode of described luminotron L1 is connected with resistance R 1, the anodic bonding of described luminotron L1 is to the high level line L+ of two buses, one end ground connection after resistance R 2 is in parallel with capacitor C 1, the other end is connected to the IN1 input end of analog to digital converter U1.
Battery unit comprises switching power supply, standby power unit, power supply automatic switch unit and power supply status collecting unit; Described switching power supply is to system power supply, and charges to the reserve battery in standby power unit, and described power supply automatic switch unit automatically switches to described standby power unit when described switching power supply power-off; Described power supply status collecting unit gathers the voltage in described battery unit, by judgement, is obtained a result and is shown by described man-machine conversation unit.
Described standby power unit comprises charging circuit of stand-by battery, the input end of described charging circuit of stand-by battery i.e. three terminal voltage voltage stabilizer UV2 is connected with primary power VAA+, the collector of triode TV3 is by the resistance R V17 output terminal that be connected to described three terminal voltage voltage stabilizer UV2s in parallel with the emitter of triode TV2, the collector of described triode TV3 is also connected with the adjustment end of described three terminal voltage voltage stabilizer UV2, the emitter of described triode TV3 is also connected with the adjustment end of described three end power regulator UV2 by resistance R V13, the collector of the collector of described triode TV2 by resistance R V15 and triode TVB1 is connected by the base stage with triode TV3 of resistance R V9 parallel connection, between the collector of described triode TVB1 and resistance R V9, be also connected with diode DVB1, resistance R V13 is connected between the base stage and emitter of triode TV2, the base stage of described triode TV2 also with the anodic bonding of diode DV2, the negative electrode of described diode DV2 is connected with standby power supply VBB+, the base stage of described triode TVB1 is connected with the negative electrode of diode ZVB1 by resistance R VB2, the anode of described diode ZVB1 is connected with standby power supply VBB+, described standby power supply VBB+ is connected with the first contact of relay R LY1 switch, the public contact of described relay R LY1 is connected with reserve battery by fuse FV2, the second contact of described relay R LY1 is connected with hummer one end, the adjustment end of described three terminal voltage voltage stabilizer UV2 is connected with the other end of described hummer with after the emitter of triode TV3 and the emitter parallel connection of triode TV1 by resistance R V18, the grounded emitter of described triode TV1, the collector of described triode TV1 is connected with coil one end of relay R LY1, the other end of the coil of described relay R LY1 is connected with the emitter of described triode TVB1, the base stage of described triode TV1 is connected to the anode of diode ZV1 by resistance R V5, the negative electrode of described diode ZV1 is connected between the coil of relay R LY1 and the emitter of triode TVB1 and external 1V voltage.
Described straight control unit comprises switching on/off circuit, current detecting amplifying circuit and voltage detecting circuit, described switching on/off circuit is connected with described main computer unit output terminal, the output terminal of described switching on/off circuit is connected with field apparatus, described current detecting amplifying circuit is connected with described circuit units with voltage detecting circuit, and be connected respectively to analog-digital conversion circuit as described, described main computer unit sends enabling signal to described switching on/off circuit, control the start and stop of field apparatus, the current signal of described circuit units is processed and is sent to analog-digital conversion circuit as described through described current detecting amplifying circuit, its voltage signal is processed and is sent to analog-digital conversion circuit as described through described voltage detecting circuit.
The input end of the switching on/off circuit of described straight control unit is that one end of coil and the signal output part of described main computer unit of relay 1JQ1 is connected, the other end ground connection of described relay 1JQ1 coil, diode 1DD7 is connected on relay 1JQ1 coil two ends, switch one end of described relay 1JQ1 is connected with external power supply CV+, described external power supply CV+ is also connected with one end of resistance 1DR1, the other end of described relay 1JQ1 switch connects the anode of diode 1DD2, the output terminal 10PR1 that the negative electrode of described diode 1DD2 is described switching on/off circuit by resistance 1DR20.
The input end of described voltage detecting circuit is that one end of resistance 1DR4 and the output terminal of described circuit units are connected, the anodic bonding of the other end of described resistance 1DR4 and diode 1DD1, the negative electrode of described diode 1DD1 is connected with one end of resistance 1DR7 respectively at resistance 1DR1, the other end of described 1DR7 is connected to the first input end 1AD0 of described analog to digital converter by resistance 1DR6, electric capacity 1DC2 is connected with the first input end 1AD0 of described analog to digital converter with one end after resistance 1DR5 parallel connection, another some ground connection in parallel.
The input end of described current detecting amplifying circuit is that one end of resistance 1DR20 is connected with the negative electrode of described diode 1DD1, diode 1DD10 is connected in parallel on the two ends of resistance 1DR20, the anode of described diode 1DD10 is connected to the positive input of operational amplifier DU5A by resistance 1DR21, the negative electrode of described diode 1DD10 is connected to the reverse input end of operational amplifier DU5A by resistance 1DR22, described operational amplifier DU5A is also by resistance 1DR23 ground connection, the plus earth of described operational amplifier DU5A, its negative pole connects external 24V power supply, its output terminal is connected to reverse input end by resistance 1DR24, the output terminal of current detecting amplifying circuit under the output terminal of described operational amplifier DU5A also consists of resistance 1DR11, it is connected to the 3rd input end 1AD3 of analog to digital converter, described the 3rd input end 1AD3 is also by resistance 1DR10 ground connection.
The fire alarm of above fire alarm control system is controlled a control method, comprises the steps:
(1) the unique address code of each field device configurations first connecting to circuit units;
(2) described battery unit is to system power supply, and system is started working, and by main computer unit, to two buses, sends synchronization pulse, and the signal returning by two buses records the background current size in two buses;
(3) main computer unit OPADD pulse signal, described address rushes signal after negater circuit second, by described on-off circuit, to the field apparatus in two buses, sends address pulse signal;
(4) field apparatus receive described synchronization pulse carry out synchronous after, receive after the described address pulse signal identical with own address code, by the code current circuit that returns in two buses, return back code current pulse, described time code current pulse sent into main computer unit and processed after analog to digital converter converts digital signal to, draws the duty of field apparatus;
(5) when described main computer unit is judged field apparatus and is sent warning message, prompting gives the alarm to described man-machine conversation unit by bus, and described main computer unit output command pulse signal, after oppositely, by pulse modulated circuit, send the straight control unit that command pulse signal connects to the field apparatus in two buses of correspondence, after described straight control unit receives this command pulse signal, start field apparatus.
A described address pulse pulsewidth is 8ms, in described address pulse, No. 0 address is used for measuring background current, described address pulse comprises the time slot of address/confession electric pulse and instruction/acceptance, described address/power supply pulse voltage is that 24V, pulsewidth are 4ms, and the time slot voltage of described instruction/reception is that 10V, pulsewidth are 4ms.
Described time code current pulse comprises the categorical data of 4Bit position 2ms pulsewidth and the status data of 4Bit position 2ms pulsewidth.
In described step (4), the disposal route of main computer unit is, while being 20mA after described time code current subtracting background electric current, described main computer unit is judged to be " 1 ", and during for 6mA, described main computer unit is judged to be " 0 ".
In described step (3), field apparatus transmission address pulse signal in two buses also comprises the step of carrying out shaping pulse by pulse shaping circuit before, in described step (5), send command pulse signal to also comprising the step of carrying out shaping pulse by pulse shaping circuit before the field apparatus in two buses of correspondence.
In whole process, also comprise that short-circuit detecting circuit detects the whether step of short circuit of two buses.
In whole process, also comprise by the step of multicomputer net unit and other fire alarm control system networking communications.
In whole process, also comprise by the step of linkage unit control bus field apparatus start and stop.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) fire alarm control system of the present invention, also comprises the circuit units that adopts two bus modes, and described circuit units comprises on-off circuit, pulse modulated circuit, returns code current circuit, analog to digital converter, field apparatus, on-off circuit, is connected with the output of pulse signal pin of described main computer unit by negater circuit, and is connected with two bus high level lines, and the field apparatus in two buses sends address pulse signal, and working power is provided, pulse modulated circuit, is connected with the command pulse signal output pin of described main computer unit by negater circuit, and is connected with two bus high level lines, and the field apparatus in two buses sends command pulse signal, return code current circuit, comprise high-side current mapping circuit, low side sample circuit and amplifying circuit, described high-side current mapping circuit is connected respectively with low level line with two bus high level lines, described low side sample circuit is connected with the low level line of described two buses, and described high-side current mapping circuit is connected with amplifying circuit after adopting circuit to be connected with described low side, described on-off circuit and pulse modulated circuit send to field apparatus by the address pulse signal of main computer unit and command pulse signal, by returning code current circuit, the numerical information of field apparatus feedback is fed back to main computer unit again, transmitting procedure adopts two bus transmission model, and not only circuit structure is simple, failure rate is low, do not improving under the prerequisite of baud rate, even if realized, in same polling period, reach up to a hundred sensing points and upload fire alarm information, also can realize within 2 second time and quoting simultaneously, having solved multiple-way system transmission line of the prior art exists quantity large, add up to failure rate high, the problem that time of fire alarming is longer, improved greatly the response time of fire alarm.
(2) fire alarm control system of the present invention and control method thereof, described circuit units comprises on-off circuit, pulse modulated circuit, returns code current circuit, analog to digital converter, field apparatus, described on-off circuit possesses function of supplying power simultaneously, simplify communication line, again can real-time detecting system equipment working state.
(3) fire alarm control system of the present invention and control method thereof, also comprise pulse shaping circuit, be connected with pulse modulated circuit with described on-off circuit, to after described command pulse signal and address pulse signal shaping, export to field apparatus, described pulse shaping circuit can be avoided the impact of capacitive load on two bus-structured circuit, thereby improves the anti-interference of data communication; Also comprise short-circuit detecting circuit, in described short-circuit detecting circuit, be provided with short circuit indicating device, when being short-circuited state, indicate, can react timely failure problems, so that quick solution circuit question, avoids not safeguarding and failing to report fire condition in time because of fault.
(4) fire alarm control system of the present invention and control method thereof, described circuit units, directly control unit, linkage unit, main computer unit and connect by CAN bus; That CAN bus has is real-time, transmission range is far away, anti-electromagnetic interference capability is strong, cost is low, and error detecing capability is strong, can in strong noise interference environment, work; Have right of priority and arbitration function, described fire alarm control system can be realized a plurality of fire alarm control system networkings by multicomputer net unit and work.
(5) fire alarm control system of the present invention and control method thereof, also comprise communication processing unit, with described circuit units, directly control unit, linkage unit and main computer unit and be connected, described communication processing unit adopts CAN communication controller and CAN bus transceiver, transmission data are anti-interference strong, also can determine to receive or shield this message according to the ID of message; And there is reliable wrong processing and error-detection mechanism, and can, by outer set net communication unit and other fire alarm control system networking communications, share information.
(6) fire alarm control system of the present invention and control method thereof, described straight control unit adopts two-wire system communication, and be provided with manual output control model and automatic linkage output mode, under manual mode, can utilize button to complete the manual control to field apparatus, when situation needs, by main computer unit, by the logic interlock straight control of the formula commander unit of scene establishment, carry out automatic linkage control, met more practical operation needs.
(7) fire alarm control system of the present invention and control method thereof, also comprise man-machine conversation unit, described man-machine conversation unit comprises liquid crystal display, keyboard, hummer, LED light, printer, touch-screen, loudspeaker, liquid crystal display and touch-screen make alarm indication content very clear, simple operation, clear, directly perceived, described hummer and loudspeaker can real-time prompting alarm condition and system failure problems, and described printer can carry out real time print to warning message, failure message as required.
(8) fire alarm control system of the present invention and control method thereof, at the two ends of CAN bus transceiver, be preferably provided with two resistance, these two resistance are for the coupling of bus impedance, play considerable effect, can improve anti-interference and the reliability of data communication, as lacked, can cause communicating by letter.The resistance that the resistance input end that CAN bus transceiver connects connects is called slope resistance, and the speed of communication depends on the resistance of slope resistance, and its resistance is less, and the speed of communication is faster.
(9) fire alarm control system of the present invention and control method thereof, in fire alarm control system control method of the present invention, described address cycle pulse is comprised of address/confession electric pulse of 24V voltage 4ms pulsewidth and the instruction/received pulse of 10V voltage 4ms pulsewidth; Each address cycle pulse is to take 8ms as an address cycle; The addressing field apparatus that 1 cycle is patrolled and examined in realization only needs 2.1s, has shortened greatly alarm cycle.
(10) fire alarm control system of the present invention and control method thereof, battery unit comprises switching power supply, standby power unit, power supply automatic switch unit and power supply status collecting unit; Described switching power supply is to system power supply, and charges to the reserve battery in standby power unit, and described power supply automatic switch unit automatically switches to described standby power unit when described switching power supply power-off; Described power supply status collecting unit gathers the voltage in described battery unit; by judgement, obtain a result and show by described man-machine conversation unit; guaranteed system power supply in all cases; and realized the automatic switchover between primary power and standby power supply; more intelligent protection system; save manpower, and battery electric quantity information can be shown to user by man-machine unit in time, maintain easily.
Accompanying drawing explanation
For content of the present invention is more likely to be clearly understood, below in conjunction with accompanying drawing, the present invention is further detailed explanation, wherein,
Fig. 1 is the structured flowchart of an embodiment of fire alarm control system of the present invention;
Fig. 2 is the structured flowchart of another embodiment of fire alarm control system of the present invention;
Fig. 3 is the structured flowchart of communication processing unit in fire alarm control system of the present invention;
Fig. 4 is the circuit diagram of circuit units described in fire alarm control system of the present invention;
Fig. 5 is the circuit diagram of battery unit described in fire alarm control system of the present invention;
Fig. 6 is the circuit diagram of the unit of straight control described in fire alarm control system of the present invention.
Embodiment
The specific embodiment of fire alarm control system of the present invention and control method thereof is provided below.
embodiment 1
As shown in Figure 1, it comprises the structure of fire alarm control system of the present invention:
Main computer unit, described main computer unit sends address pulse signal and command pulse signal, accepts feedback signal, and signal is processed and each unit is controlled;
Battery unit, is connected with main computer unit, gives system power supply;
Straight control unit, is connected respectively with field apparatus with main computer unit, according to the instruction of described main computer unit, directly controls field apparatus;
Also comprise the circuit units that adopts two bus modes, described circuit units comprises on-off circuit, pulse modulated circuit, returns code current circuit, analog to digital converter, field apparatus; First described circuit units sends to field apparatus by address pulse signal, field apparatus is according to actual conditions feedback signal, by returning code current electric circuit inspection described in circuit units and amplifying, send back described main computer unit, described main computer unit sends corresponding command pulse signal to straight control unit according to this digital signal, and described straight control unit is according to the corresponding field apparatus of command pulse signal controlling.
On-off circuit, is connected with the output of pulse signal pin of described main computer unit by negater circuit, and is connected with two bus high level lines, and the field apparatus in two buses sends address pulse signal, and working power is provided;
Pulse modulated circuit, is connected with the command pulse signal output pin of described main computer unit by negater circuit, and is connected with two bus high level lines, and the field apparatus in two buses sends command pulse signal;
Return code current circuit; comprise high-side current mapping circuit, low side sample circuit and amplifying circuit; described high-side current mapping circuit is connected respectively with low level line with two bus high level lines; described low side sample circuit is connected with the low level line of described two buses, and described high-side current mapping circuit is connected with amplifying circuit after adopting circuit to be connected with described low side;
Analog to digital converter, is connected respectively with main computer unit with described time code current circuit, and the signal of described time decoding circuit circuit is carried out inputting main computer unit after analog to digital conversion;
Field apparatus, is connected with low level line with the high level line of two buses, receives the signal in two buses.
On the basis of the fire alarm control system described in embodiment 1, described circuit units also comprises pulse shaping circuit, be connected with pulse modulated circuit with described on-off circuit, to after described command pulse signal and address pulse signal shaping, export to field apparatus, described pulse shaping circuit can be avoided the impact of capacitive load on two bus-structured circuit, thereby improves the anti-interference of data communication; Also comprise short-circuit detecting circuit, be connected respectively with described analog to digital converter with described two bus high level lines, detect the electric signal of described two buses and input described analog to digital converter; In described short-circuit detecting circuit, be provided with short circuit indicating device, when being short-circuited state, indicate, can react timely failure problems, so that quick solution circuit question is avoided not safeguarding and failing to report fire condition in time because of fault.
On the basis of the fire alarm control system described in above embodiment, described circuit units, directly control unit, main computer unit connects by CAN bus; That CAN bus has is real-time, transmission range is far away, anti-electromagnetic interference capability is strong, cost is low, and error detecing capability is strong, can in strong noise interference environment, work; Have right of priority and arbitration function, described fire alarm control system can be realized a plurality of fire alarm control system networkings by multicomputer net unit and work.
Also comprise linkage unit, described linkage unit is also connected with CAN bus, start and stop key in described linkage unit can be associated with any one or one group of bus field apparatus by definition, complete the on off control to this bus field apparatus, adopt Modular Structure Design, and can control and count according to requirement of engineering flexible configuration, simple to operate, flexible configuration, user can open/stop single bus field apparatus with a button, also an available button opens/stops one group of bus field apparatus, can visual indication go out the current startup of bus field apparatus and feedback states, facilitate user to check, directly do not connect bus field apparatus, without external cabling.
embodiment 4
On the fire alarm control system basis described in above embodiment, also comprise communication processing unit, as shown in Figure 2, with described circuit units, directly control unit, linkage unit and main computer unit and be connected, described communication processing unit is divided into internal communication unit and outer set net communication unit, described internal communication unit by two bus communication modes and described circuit units, directly control unit, linkage unit and main computer unit and carry out communication, described outer set net communication unit is by two bus communication modes and other fire alarm control system networking communications.
Described communication processing unit adopts CAN communication controller and CAN bus transceiver, adopts the independent CAN communication controller SJA1000 of PHILIPS company and the CAN bus communication interface that high-performance CAN bus transceiver PCA82C250 forms in described communication processing unit.
CAN communication controller SJA1000 has had the desired complete characteristic of CAN communication protocol, and the CAN communication controller SJA1000 connecting through simple bus can complete the Physical layer of CAN bus and all functions of data link layer.
Described main computer unit is responsible for the initialization of CAN communication controller SJA1000, by controlling CAN communication controller SJA1000, realize reception and the transmission of data, CAN communication controller SJA1000 is responsible for receiving and sending the data in CAN bus, and CAN bus transceiver 82C250 is physical interface and the driving element of CAN bus.While sending data, the data that fire alarm control unit transmits needs write the transmission buffer zone of CAN controller, start and send, and data send in bus by CAN transceiver; While receiving data, CAN controller receives data by CAN transceiver from bus, deposits people reception buffer zone after processing, and provides receive interruption signal.At this moment, fire-alarm just can be taken data away from the reception buffer zone of CAN controller.
At the two ends of CAN bus transceiver, be preferably provided with the resistance of two 20 Ω, these two resistance, for the coupling of bus impedance, play considerable effect, can improve anti-interference and the reliability of data communication, as lacked, can cause communicating by letter.Resistance between CAN bus transceiver 82C250 the 8th pin and ground is called slope resistance, and the speed of communication depends on the resistance of slope resistance, and its resistance is less, and the speed of communication is faster.
embodiment 5
On the basis of the fire alarm control system described in above embodiment, described straight control unit adopts two-wire system communication, and be provided with manual output control model and automatic linkage output mode, under manual mode, can utilize button to complete the manual control to field apparatus, when situation needs, by main computer unit, by the logic interlock straight control of the formula commander unit of scene establishment, carry out automatic linkage control, met more practical operation needs.
Also comprise man-machine conversation unit, described man-machine conversation unit comprises liquid crystal display, keyboard, hummer, LED light, printer, touch-screen, loudspeaker, for facilitate user clear and intuitive check fire alarm control unit running status and carry out parameter setting, system is preferably provided with the complete Chinese liquid crystal display of LCD, various operations provide prompting with menu-style, and can carry out address annotation by special software; The address annotation of changing for scene, can directly modify by panel button, to address points, can adopt Chinese character and character to mix pattern of annotated information, maximum 8 Chinese characters or 16 characters; And can show and concrete equipment, the room number of fault or warning make alarm indication content very clear, operate convenient, clear, directly perceived, realized good man-machine conversation; In described keyboard, be preferably provided with special function keys, as " noise reduction " key is eliminated the sound alarm signal of watch-dog for reporting to the police, under malfunction; When having new warning or failure message to occur, the sound alarm of watch-dog will be sent again, " reset " key is for making supervisory system soft reboot operation, these keys can complete interactive input function well, the indication of some important process states is set, as states such as operation, warning, faults, hummer and loudspeaker are set and can point out fire alarm control unit fault, alarm condition, described printing function automatic printing is controlled function, the real time print that switch carries out operational information recordings such as warning, faults as required.When having warning, fire alarm control unit sends fire alarm acoustical signal and reminds staff to solve in time processing, and this signal can manually be eliminated, when having again alerting signal input, fire alarm acoustical signal can start again, and gives maintenance, until fire alarm control unit resets.
embodiment 6
On the basis of the fire alarm control system described in above embodiment, as shown in Figure 3, described on-off circuit comprises the first NAND gate circuit U2A, its first input end is connected with the address pulse signal output pin of described main computer unit, described main computer unit preferably comprises single-chip microcomputer, the preferred W78E516 single-chip microcomputer that adopts, describedly be connected with its first input end with the second input end of the first NAND gate circuit U2A, it is described on-off circuit input end that the output terminal of described the first Sheffer stroke gate U2A is connected to resistance R 5 one end, the other end of described resistance R 5 is connected to the base stage of triode T2, the collector of described triode T2 is connected to the base stage of power switch pipe T1 by resistance R 4, the collector of described power switch pipe T1 is connected with two bus high level line L+, the emitter of described power switch pipe T1 is connected with its base stage by resistance R 3, the emitter of described power switch pipe T1 is also connected with external 24V power supply.
Described pulse modulated circuit comprises the second Sheffer stroke gate U3A, its first input end is connected with the command pulse signal output pin of described main computer unit, the second input end of described the second Sheffer stroke gate U3A is connected with its first input end, the output terminal of described the second Sheffer stroke gate U3A is connected with one end of resistance R 10, the other end of described resistance R 10 is connected to the base stage of triode T5, the collector of described triode T5 is connected to external 24V power supply by resistance R 11, described external 24V power supply is also connected to the input end of three-terminal voltage-stabilizing pipe T11, the collector of described triode T5 is also connected to the base stage of triode T6, the emitter of described triode T6, after one end parallel connection of one end of resistance R 12 and capacitor C 2, be connected with the emitter of triode T5, the collector of described triode T6, after the other end parallel connection of the other end of resistance R 12 and capacitor C 2, be connected to the adjustment end of three-terminal voltage-stabilizing pipe T11, resistance R 13 is connected to the output terminal of three terminal regulator T11 and adjusts between end, the output terminal of described three terminal regulator T11 is also by the resistance R 15 of connecting successively, R16 is connected to the anode of diode D1, the negative electrode of described diode D1 is connected to the high level line L+ of two buses.
High-side current mapping circuit described in described time code current circuit is connected with two bus two ends, in described high-side current mapping circuit, the collector of triode T7 is connected with the low level line L-of described two buses, the emitter of described triode T7 is connected between resistance R 15 and the output terminal of three-terminal voltage-stabilizing pipe T11 by resistance R 14, the base stage of described triode T7 is connected with the output terminal of operational amplifier U4A, the reverse input end of described operational amplifier U4A is connected with the emitter of triode T7, the positive input of described operational amplifier U4A is connected between resistance R 15 and R16, the plus earth of described operational amplifier, its negative pole connects external 24V power supply, the positive input that the low level line L-of described two buses is also operational amplifier U4B with the input end of amplifying circuit is connected, described low side sample circuit is sampling resistor R19, after the anode of one end of described sampling resistor R19 and electric capacity D2 is in parallel, be connected to the positive input of described operational amplifier U4B, after the negative electrode of the other end of sampling resistor R19 and electric capacity D2 is in parallel, by resistance R 18, be connected to the input end anyway of described operational amplifier U4B, the point ground connection in parallel of described resistance R 18 and R19, resistance R 17 is connected to the output terminal of operational amplifier U4B and anyway between input end, the output terminal of described operational amplifier U4B is the output terminal of described amplifying circuit, it is connected to the IN0 input end of analog to digital converter U1.
Described pulse shaping circuit comprises resistance R 7, one end of described resistance R 7 is connected with the output terminal of described the second Sheffer stroke gate U3A, the output terminal of described the first NAND gate circuit U2A is one end of contact resistance R6 also, after the other end parallel connection of described resistance R 7 and R6, be connected with the base stage of triode T4, the parallel connection point of the emitter of described triode T4 and the emitter of triode T3 is connected and ground connection with the emitter of triode T2, after the base stage of the collector of described triode T4 and triode T3 is in parallel, by resistance R 8, be connected to two bus high level line L+, the collector of described triode T3 is connected to two bus high level line L+ by resistance R 9.
The input end of described short-circuit detecting circuit is that one end of resistance R 1 and the IN1 input end of described analog to digital converter U1 are connected, the other end of described resistance R 1 is connected to short circuit indicating device, described short circuit indicating device is luminotron L1, the negative electrode of described luminotron L1 is connected with resistance R 1, the anodic bonding of described luminotron L1 is to the high level line L+ of two buses, one end ground connection after resistance R 2 is in parallel with capacitor C 1, the other end is connected to the IN1 input end of analog to digital converter U1.
Each circuit working principle of fire alarm control unit circuit units of the present invention is as follows:
Described main computer unit send address pulse signal after reverse with the first not circuit U2 to P1 port, through the resistance R 3 of power switch pipe T1 and periphery, the on-off circuit that R4, R5 form, field apparatus on two bus high level line L+ sends address pulse signal, simultaneously for detector, module etc. provides working power.When P1 mouth signal is high level, by resistance R 5, make triode T2 conducting, thereby make power switch pipe T1 conducting, P1 mouth signal makes triode T4 conducting by resistance R 5 simultaneously, triode T3 cut-off, high level line L+ output 24V high level.When P1 mouth signal is low level, triode T2 cut-off, triode T3 conducting, thus power switch pipe T1 is also ended, high level line L+ output 0V low level.
Described main computer unit send command pulse signal after reverse with the second not circuit U3 to P0 port, after the pulse modulated circuit being formed by three-terminal voltage-stabilizing pipe T11, triode T5, T6 and peripheral resistance R 10, R11, R12, R13 and capacitor C 2, export 0-10V voltage, field apparatus in two buses sends command pulse signal, supplies back the work of code receiving test circuit simultaneously.Described three-terminal voltage-stabilizing pipe preferably adopts LM317, and filter capacitor C2 Main Function is to reduce the pulse voltage of output with radio-frequency component, suppresses self-sustained oscillation and reduces the ripple that external interference is brought.When P0 mouth signal is high level, by resistance R 10, make triode T5 conducting, triode T6 cut-off, thus make three-terminal voltage-stabilizing pipe T11 output 10.6V high level, high level line L+ output 10V high level; When P0 mouth signal is low level, triode T5 cut-off, triode T6 conducting, thus make three-terminal voltage-stabilizing pipe T11 output 1.2V low level, high level line L+ output 0V low level.After the pulse shaping circuit that high level line L+ output forms through resistance R 6, R7, R8, the R9 of triode T3, T4 and periphery again, send into detector detector, module etc., shaping circuit can be avoided the impact of capacitive load on bus-structured circuit.
The code reception signal that returns of described circuit units is by returning code current circuit, comprising what high-side current mapping circuit, low side sample circuit and amplifying circuit were realized, return code current one tunnel two bus low level line end L-, after sampling sampling resistor R19, form pulse voltage, another road is through resistance R 15 samplings, operational amplifier U4A and triode T7, the high level line end electric current mapping circuit that resistance R 14 forms, be added on sampling sampling resistor R19 with the electric current of low level line end L-, current signal transfers voltage signal to, again through operational amplifier U4B and resistance R 17, the amplifying circuit that R18 forms amplifies output S0 by signal, S0 sends into main computer unit and processes after analog to digital converter U1 conversion, the background current value that main computer unit was adopted the different periods, marking current value, magnitude of voltage carries out fuzzy intelligence Algorithm Analysis processing, draw accurately the various running state information of field apparatus.
Described short-circuit detecting circuit is comprised of resistance R 1, R2 and capacitor C 1, in bus during circuit normal operation, L+ upper pulse voltage in loop is lighted luminotron L1, indication normal operating condition, again through resistance R 1, R2 dividing potential drop, after capacitor C 1 filtering, output 2.5V pulse, enters analog to digital conversion circuit U1 from S1 port and converts to and send into main computer unit digital signal and carry out analyzing and processing.When bus short circuit, L+ upper pulse voltage in loop is through diode D2 ground connection, thereby make power switch pipe T1 cut-off, output low level, luminotron L1 is extinguished, indication short trouble state, the S1 Port detecting of analog to digital conversion circuit U1 is to 0V voltage, converts to send into main computer unit after digital signal and carry out analyzing and processing.
embodiment 7
Battery unit comprises switching power supply, standby power unit, power supply automatic switch unit and power supply status collecting unit; Described switching power supply is to system power supply, and charge to the reserve battery in standby power unit, described power supply automatic switch unit automatically switches to described standby power unit during main electric power-off in described switching power supply, after switching power supply powers on again, power supply automatic switch unit automatically switches to Switching Power Supply power supply.
Described power supply status collecting unit gathers the voltage in described battery unit, by judgement, is obtained a result and is shown by described man-machine conversation unit, and when main electricity power supply, panel " main electricity " lamp is bright; During standby electricity power supply, " standby electricity " lamp is bright and report main electric fault.
On start-up mode, for the protection to reserve battery, do particular design,, the in the situation that of dereliction electricity, used separately reserve battery cannot start controller start.
Described standby power unit comprises charging circuit of stand-by battery, as shown in Figure 4, the input end of described charging circuit of stand-by battery i.e. three terminal voltage voltage stabilizer UV2 is connected with primary power VAA+, the collector of triode TV3 is by the resistance R V17 output terminal that be connected to described three terminal voltage voltage stabilizer UV2s in parallel with the emitter of triode TV2, the collector of described triode TV3 is also connected with the adjustment end of described three terminal voltage voltage stabilizer UV2, the emitter of described triode TV3 is also connected with the adjustment end of described three end power regulator UV2 by resistance R V13, the collector of the collector of described triode TV2 by resistance R V15 and triode TVB1 is connected by the base stage with triode TV3 of resistance R V9 parallel connection, between the collector of described triode TVB1 and resistance R V9, be also connected with diode DVB1, resistance R V13 is connected between the base stage and emitter of triode TV2, the base stage of described triode TV2 also with the anodic bonding of diode DV2, the negative electrode of described diode DV2 is connected with standby power supply VBB+, the base stage of described triode TVB1 is connected with the negative electrode of diode ZVB1 by resistance R VB2, the anode of described diode ZVB1 is connected with standby power supply VBB+, described standby power supply VBB+ is connected with the first contact of relay R LY1 switch, the public contact of described relay R LY1 is connected with reserve battery by fuse FV2, the second contact of described relay R LY1 is connected with hummer one end, the adjustment end of described three terminal voltage voltage stabilizer UV2 is connected with the other end of described hummer with after the emitter of triode TV3 and the emitter parallel connection of triode TV1 by resistance R V18, the grounded emitter of described triode TV1, the collector of described triode TV1 is connected with coil one end of relay R LY1, the other end of the coil of described relay R LY1 is connected with the emitter of described triode TVB1, the base stage of described triode TV1 is connected to the anode of diode ZV1 by resistance R V5, the negative electrode of described diode ZV1 is connected between the coil of relay R LY1 and the emitter of triode TVB1 and external 1V voltage.
embodiment 8
On the basis of the fire alarm control system described in above embodiment, as shown in Figure 5, described straight control unit comprises switching on/off circuit, current detecting amplifying circuit and voltage detecting circuit, described switching on/off circuit is connected with described main computer unit output terminal, the output terminal of described switching on/off circuit is connected with field apparatus, described current detecting amplifying circuit is connected with described circuit units with voltage detecting circuit, and be connected respectively to analog-digital conversion circuit as described, described main computer unit sends enabling signal to described switching on/off circuit, control the start and stop of field apparatus, the current signal of described circuit units is processed and is sent to analog-digital conversion circuit as described through described current detecting amplifying circuit, its voltage signal is processed and is sent to analog-digital conversion circuit as described through described voltage detecting circuit.
The input end of the switching on/off circuit of described straight control unit is that one end of coil and the signal output part of described main computer unit of relay 1JQ1 is connected, the other end ground connection of described relay 1JQ1 coil, diode 1DD7 is connected on relay 1JQ1 coil two ends, switch one end of described relay 1JQ1 is connected with external power supply CV+, described external power supply CV+ is also connected with one end of resistance 1DR1, the other end of described relay 1JQ1 switch connects the anode of diode 1DD2, the output terminal 10PR1 that the negative electrode of described diode 1DD2 is described switching on/off circuit by resistance 1DR20.
The input end of described voltage detecting circuit is that one end of resistance 1DR4 and the output terminal of described circuit units are connected, the anodic bonding of the other end of described resistance 1DR4 and diode 1DD1, the negative electrode of described diode 1DD1 is connected with one end of resistance 1DR7 respectively at resistance 1DR1, the other end of described 1DR7 is connected to the first input end 1AD0 of described analog to digital converter by resistance 1DR6, electric capacity 1DC2 is connected with the first input end 1AD0 of described analog to digital converter with one end after resistance 1DR5 parallel connection, another some ground connection in parallel.
The input end of described current detecting amplifying circuit is that one end of resistance 1DR20 is connected with the negative electrode of described diode 1DD1, diode 1DD10 is connected in parallel on the two ends of resistance 1DR20, the anode of described diode 1DD10 is connected to the positive input of operational amplifier DU5A by resistance 1DR21, the negative electrode of described diode 1DD10 is connected to the reverse input end of operational amplifier DU5A by resistance 1DR22, described operational amplifier DU5A is also by resistance 1DR23 ground connection, the plus earth of described operational amplifier DU5A, its negative pole connects external 24V power supply, its output terminal is connected to reverse input end by resistance 1DR24, the output terminal of current detecting amplifying circuit under the output terminal of described operational amplifier DU5A also consists of resistance 1DR11, it is connected to the 3rd input end 1AD3 of analog to digital converter, described the 3rd input end 1AD3 is also by resistance 1DR10 ground connection.
Interlock starting outfit, single-chip microcomputer sends enabling signal RUN1 after signal being detected, makes relay 1JQ1 closed, and output 24V voltage CV+ to 1OPR1 brings in opertaing device and starts field apparatus action.The current detecting amplifying circuit that the current signal in straight control unit controls loop forms through resistance 1DR20,1DR21,1DR22,1DR23,1DR24, diode 1DD10, amplifier DU5A is input to AD0, the voltage signal of control loop is inputted AD3 through resistance 1DR4, diode 1DD1,1DR1,1DR7,1DR5,1DR6, and AD0 and AD3 carry out data analysis processing to single-chip microcomputer after by A/D analog to digital conversion.
embodiment 9
A fire alarm control method for fire alarm control system described in above embodiment, is characterized in that, comprises the steps:
(1) the unique address code of each field device configurations first connecting to circuit units;
(2) described battery unit is to system power supply, and system is started working, and by main computer unit, to two buses, sends synchronization pulse, and the signal returning by two buses records the background current size in two buses;
(3) main computer unit OPADD pulse signal, described address rushes signal after negater circuit second, by described on-off circuit, to the field apparatus in two buses, sends address pulse signal;
(4) field apparatus receive described synchronization pulse carry out synchronous after, receive after the described address pulse signal identical with own address code, by the code current circuit that returns in two buses, return back code current pulse, described time code current pulse sent into main computer unit and processed after analog to digital converter converts digital signal to, draws the duty of field apparatus;
(6) when described main computer unit is judged field apparatus and is sent warning message, prompting gives the alarm to described man-machine conversation unit by bus, and described main computer unit output command pulse signal, after oppositely, by pulse modulated circuit, send the straight control unit that command pulse signal connects to the field apparatus in two buses of correspondence, after described straight control unit receives this command pulse signal, start field apparatus.
embodiment 10
A described address cycle pulse is 8ms, as shown in Figure 4, a polling period preferably comprises 1 synchronizing cycle and 256 address cycle pulses, in described address cycle pulse, No. 0 address is used for measuring background current, in described address cycle pulse voltage be 24V pulsewidth be 4ms be address/confession electric pulse, wherein voltage be 10V pulsewidth be 4ms be the time slot of instruction/reception, the addressing field apparatus that one-period is patrolled and examined in realization only needs 2.1s, and the address of patrolling and examining of circuit units of the present invention is only formed with 1 4ms high level and the low level square wave of 4ms, there is pulsewidth wide, only have the address of a baud position to patrol and examine code, interference free performance is very high, patrol and examine per-word error probability extremely low.
In described step (3), the field apparatus transmission address pulse signal in two buses also comprises the step of carrying out shaping pulse by pulse shaping circuit before; In described step (5), send command pulse signal to also comprising the step of carrying out shaping pulse by pulse shaping circuit before the field apparatus in two buses of correspondence; In whole process, also comprise that short-circuit detecting circuit detects the whether step of short circuit of two buses; When detecting two bus short circuits, described short-circuit detecting circuit indicates by short circuit indicating device.
Described main computer unit sends 100ms synchronizing pulse and measures background current, when the background current that first records bus can be avoided next receiving addressing field apparatus and returns coded signal, avoid the working current of field apparatus, insulation leakagel volume leakage electric currents etc. are on detecting back the impact of code data signal, field apparatus receives after the address code identical with own address, the 8Bit bit data being preferably comprised of type and status code with the passback of digitizing current system respectively according to the order of sequence at bus DC10V pulse groove is on bus, described time code current pulse preferably comprises the categorical data of 4Bit position 2ms pulsewidth and the status data of 4Bit position 2ms pulsewidth, the disposal route of described step (4) main computer unit judgement field apparatus duty is described returning while being 20mA after code current subtracting background electric current preferably, and described main computer unit is judged to be " 1 ", and during for 6mA, described main computer unit is judged to be " 0 ".
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And the apparent variation of being extended out thus or change are still among the protection domain in the invention
.
Claims (10)
1. a fire alarm control system, comprising:
Main computer unit, described main computer unit sends address pulse signal and command pulse signal, and receives the digital signal of feedback, and signal is processed and each unit is controlled;
Battery unit, is connected with main computer unit, gives system power supply;
Straight control unit, is connected respectively with field apparatus with main computer unit, according to the instruction of described main computer unit, directly controls field apparatus;
It is characterized in that, also comprise the circuit units that adopts two bus modes, described circuit units comprises on-off circuit, pulse modulated circuit, returns code current circuit, analog to digital converter, field apparatus;
On-off circuit, is connected with the output of pulse signal pin of described main computer unit by negater circuit, and is connected with two bus high level lines, and the field apparatus in two buses sends address pulse signal, and working power is provided;
Pulse modulated circuit, is connected with the command pulse signal output pin of described main computer unit by negater circuit, and is connected with two bus high level lines, and the field apparatus in two buses sends command pulse signal;
Return code current circuit; comprise high-side current mapping circuit, low side sample circuit and amplifying circuit; described high-side current mapping circuit is connected respectively with low level line with two bus high level lines; described low side sample circuit is connected with the low level line of described two buses, and described high-side current mapping circuit is connected with amplifying circuit after adopting circuit to be connected with described low side;
Analog to digital converter, is connected respectively with main computer unit with described time code current circuit, and the signal of described time decoding circuit is carried out inputting main computer unit after analog to digital conversion;
Field apparatus, is connected with low level line with the high level line of two buses, receives the signal in two buses.
2. fire alarm control system according to claim 1, it is characterized in that, described circuit units also comprises pulse shaping circuit, is connected with pulse modulated circuit with described on-off circuit, will after described command pulse signal and address pulse signal shaping, export to field apparatus; Also comprise short-circuit detecting circuit, be connected respectively with described analog to digital converter with described two bus high level lines, detect the electric signal of described two buses and input described analog to digital converter; In described short-circuit detecting circuit, be provided with short circuit indicating device, when being short-circuited state, indicate.
3. fire alarm control system according to claim 1 and 2, is characterized in that, described circuit units, directly control unit, main computer unit connects by CAN bus;
Fire alarm control system according to described in claim 1-3 any one, is characterized in that, also comprises multicomputer net unit, and described fire alarm control system can be realized a plurality of fire alarm control system networkings by multicomputer net unit and work;
According to the fire alarm control system described in claim 1-4 any one, it is characterized in that, also comprise linkage unit, described linkage unit is also connected with CAN bus, start and stop key in described linkage unit can be associated with any one or one group of bus field apparatus by definition, completes the on off control to this bus field apparatus.
4. according to the fire alarm control system described in claim 1-5 any one, it is characterized in that, also comprise communication processing unit, described communication processing unit is divided into internal communication unit and outer set net communication unit, described internal communication unit by two bus communication modes and described circuit units, directly control unit, linkage unit and main computer unit and carry out communication, described outer set net communication unit is by two bus communication modes and other fire alarm control system networking communications;
According to the fire alarm control system described in claim 1-6 any one, it is characterized in that, described communication processing unit adopts CAN communication controller and CAN bus transceiver, the two ends of described CAN bus transceiver are respectively equipped with two resistance, and the resistance input end of described CAN bus transceiver is connected with slope resistance;
Fire alarm control system according to described in claim 1-7 any one, is characterized in that, described straight control unit adopts two-wire system communication, and is provided with manual output control model and automatic linkage output mode;
Fire alarm control system according to described in claim 1-8 any one, is characterized in that, also comprises man-machine conversation unit, and described man-machine conversation unit comprises liquid crystal display, keyboard, hummer, LED light, printer, touch-screen, loudspeaker.
5. according to the fire alarm system described in claim 1-9 any one, it is characterized in that, described on-off circuit comprises the first NAND gate circuit U2A, its first input end is connected with the address pulse signal output pin of main computer unit in described circuit units, describedly be connected with its first input end with the second input end of the first NAND gate circuit U2A, it is described on-off circuit input end that the output terminal of described the first Sheffer stroke gate U2A is connected to resistance R 5 one end, the other end of described resistance R 5 is connected to the base stage of triode T2, the collector of described triode T2 is connected to the base stage of power switch pipe T1 by resistance R 4, the collector of described power switch pipe T1 is connected with two bus high level line L+, the emitter of described power switch pipe T1 is connected with its base stage by resistance R 3, the emitter of described power switch pipe T1 is also connected with external 24V power supply,
According to the fire alarm control system described in claim 1-10 any one, it is characterized in that, described pulse modulated circuit comprises the second Sheffer stroke gate U3A, its first input end is connected with the command pulse signal output pin of described main computer unit, the second input end of described the second Sheffer stroke gate U3A is connected with its first input end, the output terminal of described the second Sheffer stroke gate U3A is connected with one end of resistance R 10, the other end of described resistance R 10 is connected to the base stage of triode T5, the collector of described triode T5 is connected to external 24V power supply by resistance R 11, described external 24V power supply is also connected to the input end of three-terminal voltage-stabilizing pipe T11, the collector of described triode T5 is also connected to the base stage of triode T6, the emitter of described triode T6, after one end parallel connection of one end of resistance R 12 and capacitor C 2, be connected with the emitter of triode T5, the collector of described triode T6, after the other end parallel connection of the other end of resistance R 12 and capacitor C 2, be connected to the adjustment end of three-terminal voltage-stabilizing pipe T11, resistance R 13 is connected to the output terminal of three terminal regulator T11 and adjusts between end, the output terminal of described three terminal regulator T11 is also by the resistance R 15 of connecting successively, R16 is connected to the anode of diode D1, the negative electrode of described diode D1 is connected to the high level line L+ of two buses,
According to the fire alarm control system described in claim 1-11 any one, it is characterized in that, high-side current mapping circuit described in described time code current circuit is connected with two bus two ends, in described high-side current mapping circuit, the collector of triode T7 is connected with the low level line L-of described two buses, the emitter of described triode T7 is connected between resistance R 15 and the output terminal of three-terminal voltage-stabilizing pipe T11 by resistance R 14, the base stage of described triode T7 is connected with the output terminal of operational amplifier U4A, the reverse input end of described operational amplifier U4A is connected with the emitter of triode T7, the positive input of described operational amplifier U4A is connected between resistance R 15 and R16, the plus earth of described operational amplifier, its negative pole connects external 24V power supply, the positive input that the low level line L-of described two buses is also operational amplifier U4B with the input end of amplifying circuit is connected, described low side sample circuit is sampling resistor R19, after the anode of one end of described sampling resistor R19 and electric capacity D2 is in parallel, be connected to the positive input of described operational amplifier U4B, after the negative electrode of the other end of sampling resistor R19 and electric capacity D2 is in parallel, by resistance R 18, be connected to the input end anyway of described operational amplifier U4B, the point ground connection in parallel of described resistance R 18 and R19, resistance R 17 is connected to the output terminal of operational amplifier U4B and anyway between input end, the output terminal of described operational amplifier U4B is the output terminal of described amplifying circuit, it is connected to the IN0 input end of analog to digital converter U1,
According to the fire alarm control system described in claim 1-12 any one, it is characterized in that, described pulse shaping circuit comprises resistance R 7, one end of described resistance R 7 is connected with the output terminal of described the second Sheffer stroke gate U3A, the output terminal of described the first NAND gate circuit U2A is one end of contact resistance R6 also, after the other end parallel connection of described resistance R 7 and R6, be connected with the base stage of triode T4, the parallel connection point of the emitter of described triode T4 and the emitter of triode T3 is connected and ground connection with the emitter of triode T2, after the base stage of the collector of described triode T4 and triode T3 is in parallel, by resistance R 8, be connected to two bus high level line L+, the collector of described triode T3 is connected to two bus high level line L+ by resistance R 9,
According to the fire alarm control system described in claim 1-13 any one, it is characterized in that, the input end of described short-circuit detecting circuit is that one end of resistance R 1 and the IN1 input end of described analog to digital converter U1 are connected, the other end of described resistance R 1 is connected to short circuit indicating device, described short circuit indicating device is luminotron L1, the negative electrode of described luminotron L1 is connected with resistance R 1, the anodic bonding of described luminotron L1 is to the high level line L+ of two buses, one end ground connection after resistance R 2 is in parallel with capacitor C 1, the other end is connected to the IN1 input end of analog to digital converter U1.
6. according to the fire alarm control system described in claim 1-14 any one, it is characterized in that, battery unit comprises switching power supply, standby power unit, power supply automatic switch unit and power supply status collecting unit; Described switching power supply is to system power supply, and charges to the reserve battery in standby power unit, and described power supply automatic switch unit automatically switches to described standby power unit when described switching power supply power-off; Described power supply status collecting unit gathers the voltage in described battery unit, by judgement, is obtained a result and is shown by described man-machine conversation unit;
According to the fire alarm control system described in claim 1-15 any one, it is characterized in that, described standby power unit comprises charging circuit of stand-by battery, the input end of described charging circuit of stand-by battery i.e. three terminal voltage voltage stabilizer UV2 is connected with primary power VAA+, the collector of triode TV3 is by the resistance R V17 output terminal that be connected to described three terminal voltage voltage stabilizer UV2s in parallel with the emitter of triode TV2, the collector of described triode TV3 is also connected with the adjustment end of described three terminal voltage voltage stabilizer UV2, the emitter of described triode TV3 is also connected with the adjustment end of described three end power regulator UV2 by resistance R V13, the collector of the collector of described triode TV2 by resistance R V15 and triode TVB1 is connected by the base stage with triode TV3 of resistance R V9 parallel connection, between the collector of described triode TVB1 and resistance R V9, be also connected with diode DVB1, resistance R V13 is connected between the base stage and emitter of triode TV2, the base stage of described triode TV2 also with the anodic bonding of diode DV2, the negative electrode of described diode DV2 is connected with standby power supply VBB+, the base stage of described triode TVB1 is connected with the negative electrode of diode ZVB1 by resistance R VB2, the anode of described diode ZVB1 is connected with standby power supply VBB+, described standby power supply VBB+ is connected with the first contact of relay R LY1 switch, the public contact of described relay R LY1 is connected with reserve battery by fuse FV2, the second contact of described relay R LY1 is connected with hummer one end, the adjustment end of described three terminal voltage voltage stabilizer UV2 is connected with the other end of described hummer with after the emitter of triode TV3 and the emitter parallel connection of triode TV1 by resistance R V18, the grounded emitter of described triode TV1, the collector of described triode TV1 is connected with coil one end of relay R LY1, the other end of the coil of described relay R LY1 is connected with the emitter of described triode TVB1, the base stage of described triode TV1 is connected to the anode of diode ZV1 by resistance R V5, the negative electrode of described diode ZV1 is connected between the coil of relay R LY1 and the emitter of triode TVB1 and external 1V voltage.
7. according to the fire alarm control system described in claim 1-16 any one, it is characterized in that, described straight control unit comprises switching on/off circuit, current detecting amplifying circuit and voltage detecting circuit, described switching on/off circuit is connected with described main computer unit output terminal, the output terminal of described switching on/off circuit is connected with field apparatus, described current detecting amplifying circuit is connected with described circuit units with voltage detecting circuit, and be connected respectively to analog-digital conversion circuit as described, described main computer unit sends enabling signal to described switching on/off circuit, control the start and stop of field apparatus, the current signal of described circuit units is processed and is sent to analog-digital conversion circuit as described through described current detecting amplifying circuit, its voltage signal is processed and is sent to analog-digital conversion circuit as described through described voltage detecting circuit,
According to the fire alarm control system described in claim 1-17 any one, it is characterized in that, the input end of the switching on/off circuit of described straight control unit is that one end of coil and the signal output part of described main computer unit of relay 1JQ1 is connected, the other end ground connection of described relay 1JQ1 coil, diode 1DD7 is connected on relay 1JQ1 coil two ends, switch one end of described relay 1JQ1 is connected with external power supply CV+, described external power supply CV+ is also connected with one end of resistance 1DR1, the other end of described relay 1JQ1 switch connects the anode of diode 1DD2 by resistance 1DR20, the negative electrode of described diode 1DD2 is the output terminal 10PR1 of described switching on/off circuit,
According to the fire alarm control system described in claim 1-18 any one, it is characterized in that, the input end of described voltage detecting circuit is that one end of resistance 1DR4 and the output terminal of described circuit units are connected, the anodic bonding of the other end of described resistance 1DR4 and diode 1DD1, the negative electrode of described diode 1DD1 is connected with one end of resistance 1DR7 respectively at resistance 1DR1, the other end of described 1DR7 is connected to the first input end 1AD0 of described analog to digital converter by resistance 1DR6, electric capacity 1DC2 is connected with the first input end 1AD0 of described analog to digital converter with one end after resistance 1DR5 parallel connection, another some ground connection in parallel,
According to the fire alarm control system described in claim 1-19 any one, it is characterized in that, the input end of described current detecting amplifying circuit is that one end of resistance 1DR20 is connected with the negative electrode of described diode 1DD1, diode 1DD10 is connected in parallel on the two ends of resistance 1DR20, the anode of described diode 1DD10 is connected to the positive input of operational amplifier DU5A by resistance 1DR21, the negative electrode of described diode 1DD10 is connected to the reverse input end of operational amplifier DU5A by resistance 1DR22, described operational amplifier DU5A is also by resistance 1DR23 ground connection, the plus earth of described operational amplifier DU5A, its negative pole connects external 24V power supply, its output terminal is connected to reverse input end by resistance 1DR24, the output terminal of current detecting amplifying circuit under the output terminal of described operational amplifier DU5A also consists of resistance 1DR11, it is connected to the 3rd input end 1AD3 of analog to digital converter, described the 3rd input end 1AD3 is also by resistance 1DR10 ground connection.
8. the fire alarm of the fire alarm control system described in right to use requirement 1-20 is controlled a control method, it is characterized in that, comprises the steps:
(1) the unique address code of each field device configurations first connecting to circuit units;
(2) described battery unit is to system power supply, and system is started working, and by main computer unit, to two buses, sends synchronization pulse, and the signal returning by two buses records the background current size in two buses;
(3) main computer unit OPADD pulse signal, described address rushes signal after negater circuit second, by described on-off circuit, to the field apparatus in two buses, sends address pulse signal;
(4) field apparatus receive described synchronization pulse carry out synchronous after, receive after the described address pulse signal identical with own address code, by the code current circuit that returns in two buses, return back code current pulse, described time code current pulse sent into main computer unit and processed after analog to digital converter converts digital signal to, draws the duty of field apparatus;
(5) when described main computer unit is judged field apparatus and is sent warning message, prompting gives the alarm to described man-machine conversation unit by bus, and described main computer unit output command pulse signal, after oppositely, by pulse modulated circuit, send the straight control unit that command pulse signal connects to the field apparatus in two buses of correspondence, after described straight control unit receives this command pulse signal, start field apparatus.
9. control method according to claim 21, it is characterized in that, a described address pulse pulsewidth is 8ms, in described address pulse, No. 0 address is used for measuring background current, described address pulse comprises the time slot of address/confession electric pulse and instruction/acceptance, described address/power supply pulse voltage is that 24V, pulsewidth are 4ms, and the time slot voltage of described instruction/reception is that 10V, pulsewidth are 4ms;
Control method according to described in claim 21 or 22, is characterized in that, described time code current pulse comprises the categorical data of 4Bit position 2ms pulsewidth and the status data of 4Bit position 2ms pulsewidth;
Control method according to described in claim 21-23 any one, is characterized in that, in described step (4), the disposal route of main computer unit is, while being 20mA after described time code current subtracting background electric current, described main computer unit is judged to be " 1 ", and during for 6mA, described main computer unit is judged to be " 0 ".
10. according to the control method described in claim 21-24 any one, it is characterized in that, in described step (3), field apparatus transmission address pulse signal in two buses also comprises the step of carrying out shaping pulse by pulse shaping circuit before, in described step (5), send command pulse signal to also comprising the step of carrying out shaping pulse by pulse shaping circuit before the field apparatus in two buses of correspondence;
Control method according to described in claim 21-25 any one, is characterized in that, in whole process, also comprises that short-circuit detecting circuit detects the whether step of short circuit of two buses;
Control method according to described in claim 21-26 any one, is characterized in that, in whole process, also comprises by the step of multicomputer net unit and other fire alarm control system networking communications; Control method according to described in claim 21-27 any one, is characterized in that, in whole process, also comprises by the step of linkage unit control bus field apparatus start and stop.
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Address after: Yueqing City, Liushi town Zhejiang city Wenzhou province 325604 Willow Road No. 168 Patentee after: Zhejiang aide intelligent Polytron Technologies Inc Address before: 325604 Liushi Town Station Road, Yueqing City, Wenzhou, Zhejiang Province, No. 628 Patentee before: Zhejiang EIT Electron Co., Ltd. |