CN104143244A - Communication method for automatic fire alarm system and automatic fire alarm system - Google Patents
Communication method for automatic fire alarm system and automatic fire alarm system Download PDFInfo
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- CN104143244A CN104143244A CN201310408129.1A CN201310408129A CN104143244A CN 104143244 A CN104143244 A CN 104143244A CN 201310408129 A CN201310408129 A CN 201310408129A CN 104143244 A CN104143244 A CN 104143244A
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Abstract
The invention discloses a communication method for an automatic fire alarm system and the automatic fire alarm system. A controller sends codes to bus assemblies one by one in the mode of a positive voltage pulse through a bus to conduct polling and receives feedback codes of the corresponding bus assemblies. The bus assemblies make a response and feed back codes according to the current signal superposition method. The controller judges whether a fire alarm needs to be reported according to the value of the feedback codes of the corresponding bus assemblies. If the feedback codes of certain bus assemblies are not received within the polling time lasting for 90 seconds, it is determined that the bus assemblies are in the fault state. The voltage on the bus is always higher than a power source nominal voltage. By the adoption of the communication method for the automatic fire alarm system and the automatic fire alarm system, the manufacturing cost of the bus assemblies is reduced, the size is reduced, a needed power source is small, heat dissipation does not need to be considered, forced ventilation is not needed, and the wire diameter of a wire can be reduced appropriately during on-site construction.
Description
Technical field
The present invention relates to automatic fire alarm field, relate in particular to a kind of automatic fire alarm system communication modes and fire alarm automatic alarm system.
Background technology
Automatic fire alarm system is generally connected with it by fire alarm control unit (abbreviation controller) and is distributed in each monitoring point, the fire detector at reference mark, combustible gas probe, appliance fire detector, manual fire alarm call point, fire hydrant button, load module, input/output module, trunk module, acoustooptic alarm, the compositions such as fire display panel (being called for short bus parts), between controller and each bus parts, by two bus modes, be connected, generally, nearly 200 of the bus parts that can carry in two buses, under perfect condition, controller must respond each detector fast, the alarm condition of button and load module, start quickly and accurately input/output module, acoustooptic alarm etc., and reflect in time its feedback states.
In the automatic fire alarm system of existing two bussing techniques, all that the data line of bus parts and power lead are shared, controller sends by employing the state that mode that address poll searches is monitored each bus parts, controller sends the three level voltage modes for data acquisition of bus parts to, bus parts send the data acquisition current system of controller to, and the variation by bus current sends bus parts data to controller.For guaranteeing controller and the exchange of bus parts data, signal waveform is defined to conventional way as shown in Figure 1, be characterized in voltage in bus be +24V and+pulse between 5V, therefore in order to give the power supply of bus parts, have to adopt a jumbo electrolytic condenser to carry out storage power in each bus parts, to obtain more stable voltage, thus cause the volume of bus parts large, power consumption is high, manufacturing cost rises; Because each the bus parts in bus have a large electric capacity, when start powers on, to large capacitor charging, can make the impact of bus voltage very large simultaneously, too many for avoiding bus voltage to decline, when deisgn product and on-the-spot installation, not only to strengthen the power supply power of whole system, also the wire diameter of necessary overstriking on-site transfer wire.
Summary of the invention
In view of this, the object of this invention is to provide a kind of automatic fire alarm system communication modes and fire alarm automatic alarm system, to solve the problems of the prior art.
In order to achieve the above object, the object of the invention is to be achieved through the following technical solutions:
On the one hand, a kind of automatic fire alarm system communication modes is provided, realizes the intercommunication mutually between fire alarm control unit and bus parts, between described fire alarm control unit and a plurality of described bus parts, form bus communication network, wherein, comprise the following steps:
Described fire alarm control unit is is normally patrolled and examined to described bus parts signaling with the form of positive voltage pulse one by one by bus, and described fire alarm control unit receives the code that returns of described bus parts according to described signaling;
Described bus parts are replied back code with the method for superimposed current signal;
If do not receive in certain monitoring time that any one above-mentioned bus parts returns code, confirm that described bus parts are in malfunction always;
Voltage in described bus is all the time higher than power supply nominal voltage.
Above-mentioned automatic fire alarm system communication modes, wherein, described in the address code of patrolling and examining be 1 frame, described in the order of patrolling and examining be 1 frame or field
Above-mentioned automatic fire alarm system communication modes, wherein, each frame of the signaling that described controller sends is 11, comprises 1 start bit, 8 bit address positions and 2 order of the bit positions, a high position is first sent out; Time each frame of code that described bus parts send is 9, comprises 1 start bit, 8 bit data positions, and a high position is first sent out.
Above-mentioned automatic fire alarm system communication modes, wherein, described signaling is asymmetric pulses ripple, and wherein start bit waveform is that 2ms high level adds 0.7ms low level, 0 waveform is that 0.6ms high level adds 1.2ms low level, and 1 waveform is that 1.5ms high level adds 0.4ms low level.
Above-mentioned automatic fire alarm system communication modes, wherein, described time code is asymmetric pulses ripple, and wherein start bit waveform is that 2.6ms high level adds 0.8ms low level, 0 waveform is that 0.9ms high level adds 1.5ms low level, and 1 waveform is that 1.7ms high level adds 0.8ms low level.
Above-mentioned automatic fire alarm system communication modes, wherein, waveform 1 level in described bus is 30V, 0 level is that 24v. so bus voltage are always higher than power supply nominal voltage 24V.
Above-mentioned automatic fire alarm system communication modes, it is characterized in that, described bus parts comprise: fire detector, combustible gas probe, appliance fire detector, manual fire alarm call point, fire hydrant button, load module, input/output module, trunk module, acoustooptic alarm and fire display panel.
On the other hand, provide a kind of fire alarm automatic alarm system, wherein, adopt automatic fire alarm system communication modes as described in above-mentioned any one.
Compared with the prior art, beneficial effect of the present invention is:
Voltage in bus is all the time higher than power supply nominal voltage 24V, so just make not need to adopt in bus parts jumbo electrolytic condenser, advantage be reduce manufacturing cost, reduced volume, the power consumption of bus parts can be lower than 400 μ A; When start powers on, can bus voltage not produced and be impacted.The benefit of bringing is apparent, and system power supply power supply needn't be considered the impact that powers on of start, thereby the power supply needing is less, need not consider heat radiation, without forced draft etc.; During site operation, can suitably reduce the wire diameter of wire.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the bus communication oscillogram on fire alarm control unit in prior art;
Fig. 2 is the bus communication oscillogram on fire alarm control unit of the present invention;
Fig. 3 is fire alarm control unit signaling form of the present invention;
Fig. 4 is that bus parts of the present invention return a yard form;
Fig. 5 is fire alarm control unit signaling waveform definition of the present invention;
Fig. 6 is that bus parts of the present invention return a yard waveform definition;
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the present invention can combine mutually.
Please refer to shown in Fig. 1 to Fig. 6, fire alarm communication modes of the present invention is realized the intercommunication mutually between controller and bus parts, between controller and a plurality of bus parts, forms bus communication network, in communication modes of the present invention, comprises the following steps:
Controller is is normally patrolled and examined to bus parts signaling with the form of positive voltage pulse one by one by bus, and controller receives the code that returns of bus parts according to signaling;
Bus parts are replied back code with the method for superimposed current signal.
If (in 90 seconds) do not receive that some bus parts returns code in certain monitoring time always, confirm that bus parts are in malfunction;
Voltage in bus is all the time higher than power supply nominal voltage.
The address code of patrolling and examining is 1 frame, and the order of patrolling and examining is 1 frame or field.
Each frame of the signaling that controller sends is 11, comprises 1 start bit, 8 bit address positions and 2 order of the bit positions, and a high position is first sent out; Time each frame of code that bus parts send is 9, comprises 1 start bit, 8 bit data positions, and a high position is first sent out.
Signaling is asymmetric pulses ripple, and wherein start bit waveform is that 2ms high level adds 0.7ms low level, and 0 waveform is that 0.6ms high level adds 1.2ms low level, and 1 waveform is that 1.5ms high level adds 0.4ms low level.Returning code is asymmetric pulses ripple, and wherein start bit waveform is that 2.6ms high level adds 0.8ms low level, and 0 waveform is that 0.9ms high level adds 1.5ms low level, and 1 waveform is that 1.7ms high level adds 0.8ms low level.
Waveform 1 level in bus is 30V, and 0 level is 24v, so bus voltage is always higher than power supply nominal voltage 24V.
In fire alarm communication modes, signaling is asymmetric pulses ripple, and wherein start bit waveform is that 2ms high level adds 0.7ms low level, and 0 waveform is that 0.6ms high level adds 1.2ms low level, and 1 waveform is that 1.5ms high level adds 0.4ms low level.Return also asymmetric pulses ripple of code, wherein start bit waveform is that 2.6ms high level adds 0.8ms low level, and 0 waveform is that 0.9ms high level adds 1.5ms low level, and 1 waveform is that 1.7ms high level adds 0.8ms low level.Such waveform is extremely conducive to the differentiation to " 1 " and " 0 " of microcomputer in bus parts.Method of discrimination is: at circuit, receive behind the forward position of each bit, the microcomputer software trigger in bus parts, after the about 1.1ms of time delay, the level of detection waveform again, as throw away as high level, can judge that this bit is as " 1 ", otherwise should judge that this bit is as " 0 ".In fact the arbitrary value change that delay time can be between 0.5ms and 1.4ms and do not affect the accuracy of judgement, in other words, the Shi Jike of the microcomputer in bus parts allows in very large range to fluctuate, the reason of Here it is bus parts are able to low cost fabrication.
In addition, the time of each bit is more than or equal to 1.8ms, and this just makes transmission medium needn't adopt the high twisted-pair feeder of price or concentric cable to guarantee that the front and back of waveform degenerate along unlikely, thereby has greatly reduced construction costs.
Equally owing to adopting broad pulse waveform, make bus parts needn't adopt complicated receipt decoding circuit, as differential amplification reshaper used in RS-485 bus system, and only need adopt an electric capacity and a resistance just can isolate the communications protocol waveform being included in 24V power supply bus, this has just further reduced the cost of bus parts.
The purpose that start bit is set is, with bus parts time base to start bit timing, so that the inconsistency of correcting controller and bus parts timebase frequency used, it is positive and negative 15% that the time base error of permission can reach, this just make bus parts can adopt cheap RC oscillator as time base.Because the quantity of bus parts is very huge, in a set of automatic fire alarm system, bus number of components is individual to up to ten thousand from hundreds of, so greatly reduced the cost of whole system, has also improved the reliability of communication simultaneously.
Voltage in bus is always higher than power supply nominal voltage 24V.Because the voltage in bus is all the time higher than power supply nominal voltage 24V, so just make not need to adopt in bus parts jumbo electrolytic condenser, advantage be reduce manufacturing cost, reduced volume, the power consumption of bus parts can be lower than 400 μ A; When start powers on, can bus voltage not produced and be impacted.The benefit of bringing is apparent, and system power supply power supply needn't be considered the impact that powers on of start, thereby the power supply needing is less, need not consider heat radiation, without forced draft etc.; During site operation, can suitably reduce the wire diameter of wire.
On the other hand, provide a kind of fire alarm automatic alarm system, wherein, adopt automatic fire alarm system communication modes as described above.
Above specific embodiments of the invention be have been described in detail, but the present invention is not restricted to specific embodiment described above, it is just as example.To those skilled in the art, any equivalent modifications and alternative also all among category of the present invention.Therefore, equalization conversion and the modification done without departing from the spirit and scope of the invention, all should contain within the scope of the invention.
Claims (8)
1. an automatic fire alarm system communication modes, realizes the intercommunication mutually between fire alarm control unit and bus parts, between described fire alarm control unit and a plurality of described bus parts, forms bus communication network, it is characterized in that, comprises the following steps:
Described fire alarm control unit is is normally patrolled and examined to described bus parts signaling with the form of positive voltage pulse one by one by bus, and described fire alarm control unit receives the code that returns of described bus parts according to described signaling;
Described bus parts are replied back code with the method for superimposed current signal;
If do not receive in certain monitoring time that any one above-mentioned bus parts returns code, confirm that described bus parts are in malfunction always;
Voltage in described bus is all the time higher than power supply nominal voltage.
2. automatic fire alarm system communication modes according to claim 1, is characterized in that, described in the address code of patrolling and examining be 1 frame, described in the order of patrolling and examining be 1 frame or field.
3. automatic fire alarm system communication modes according to claim 1, is characterized in that, each frame of the signaling that described fire alarm control unit sends is 11, comprises 1 start bit, 8 bit address positions and 2 order of the bit positions, and a high position is first sent out; Time each frame of code that described bus parts send is 9, comprises 1 start bit, 8 bit data positions, and a high position is first sent out.
4. automatic fire alarm system communication modes according to claim 1, is characterized in that, described signaling is asymmetric pulses ripple, and wherein 0 waveform is that 0.6ms high level adds 1.2ms low level, and 1 waveform is that 1.5ms high level adds 0.4ms low level.
5. automatic fire alarm system communication modes according to claim 1, is characterized in that, described time code is asymmetric pulses ripple, and wherein 0 waveform is that 0.9ms high level adds 1.5ms low level, and 1 waveform is that 1.7ms high level adds 0.8ms low level.
6. automatic fire alarm system communication modes according to claim 1, is characterized in that, waveform 1 level in described bus is 30V, and 0 level is that 24v. so bus voltage are always higher than power supply nominal voltage 24V.
7. automatic fire alarm system communication modes according to claim 1, it is characterized in that, described bus parts comprise: fire detector, combustible gas probe, appliance fire detector, manual fire alarm call point, fire hydrant button, load module, input/output module, trunk module, acoustooptic alarm and fire display panel.
8. a fire alarm automatic alarm system, is characterized in that, adopts automatic fire alarm system communication modes as described in any one in claim 1 to 7.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105245736A (en) * | 2015-09-29 | 2016-01-13 | 深圳市泛海三江电子有限公司 | Bus type fire-fighting communication system |
| CN105425695A (en) * | 2015-11-04 | 2016-03-23 | 深圳市泛海三江电子有限公司 | Inspection type monitoring communication method of fireproof door monitoring system and related equipment |
| CN106846762A (en) * | 2017-02-17 | 2017-06-13 | 四川赛科安全技术有限公司 | The method that code is returned in a kind of self checking of operated type industrial bus |
| CN107230993A (en) * | 2017-08-02 | 2017-10-03 | 四川赛科安全技术有限公司 | The remote constant pressure method of supplying power to of fire-fighting bus based on input/output module |
| CN107369306A (en) * | 2017-06-15 | 2017-11-21 | 深圳市泰和安科技有限公司 | A kind of repeated code detection method, repeated code detection means and electronic equipment |
| CN107453378A (en) * | 2017-08-02 | 2017-12-08 | 四川赛科安全技术有限公司 | The remote constant pressure method of supplying power to realized the method for fire-fighting bus output variable power and be made up of it |
| CN110225215A (en) * | 2019-06-06 | 2019-09-10 | 四川赛科安全技术有限公司 | A method of realizing that signal transmits between fire telephone host and extension set |
| CN115273435A (en) * | 2022-07-28 | 2022-11-01 | 阳江核电有限公司 | Test system and test device of fire detection equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105425695A (en) * | 2015-11-04 | 2016-03-23 | 深圳市泛海三江电子有限公司 | Inspection type monitoring communication method of fireproof door monitoring system and related equipment |
| CN105425695B (en) * | 2015-11-04 | 2018-07-24 | 深圳市泛海三江电子股份有限公司 | Inspection type monitoring communication method of fireproof door monitoring system and related equipment |
| CN106846762A (en) * | 2017-02-17 | 2017-06-13 | 四川赛科安全技术有限公司 | The method that code is returned in a kind of self checking of operated type industrial bus |
| CN107369306A (en) * | 2017-06-15 | 2017-11-21 | 深圳市泰和安科技有限公司 | A kind of repeated code detection method, repeated code detection means and electronic equipment |
| CN107230993A (en) * | 2017-08-02 | 2017-10-03 | 四川赛科安全技术有限公司 | The remote constant pressure method of supplying power to of fire-fighting bus based on input/output module |
| CN107453378A (en) * | 2017-08-02 | 2017-12-08 | 四川赛科安全技术有限公司 | The remote constant pressure method of supplying power to realized the method for fire-fighting bus output variable power and be made up of it |
| CN107453378B (en) * | 2017-08-02 | 2020-06-16 | 四川赛科安全技术有限公司 | Method for realizing variable power output of fire-fighting bus and remote constant-voltage power supply method |
| CN110225215A (en) * | 2019-06-06 | 2019-09-10 | 四川赛科安全技术有限公司 | A method of realizing that signal transmits between fire telephone host and extension set |
| CN115273435A (en) * | 2022-07-28 | 2022-11-01 | 阳江核电有限公司 | Test system and test device of fire detection equipment |
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