CN101030315A - Linear temperature-sensing fire detector based on sensor network - Google Patents
Linear temperature-sensing fire detector based on sensor network Download PDFInfo
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- CN101030315A CN101030315A CN 200610022608 CN200610022608A CN101030315A CN 101030315 A CN101030315 A CN 101030315A CN 200610022608 CN200610022608 CN 200610022608 CN 200610022608 A CN200610022608 A CN 200610022608A CN 101030315 A CN101030315 A CN 101030315A
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Abstract
A linear temperature-sensing fire detector based on transducer network consists of temperature-sensing fire alarm cable including a grounding wire, a power supply wire, a data line, a plate temperature transducer at center layer, TFE wrapping belt, metal screen shielding layer and F plastic fire-resisting layer; and fire alarm controller connected to said cable.
Description
Technical field
The invention belongs to the fire alarm field, is a kind of line-type heat detector based on sensor network specifically, comprises fire alarm cable and fire alarm control unit.
Background technology
Line-type heat detector is as fire detector element with the line type temperature-sensitive cable, can in rugged surroundings such as pollution, dust, humidity and corrosion are arranged, finish the fire locating alarming, therefore be adapted at applications such as smelter, railway, tunnel, underground mine, chemical enterprise, large-scale storehouse.The line type fire detector that uses mainly is divided into electric resistance cable type temperature-sensitive alarm cables and optical fiber type temperature-sensitive alarm cables now.Resistor-type fire alarm cable partly is to adopt two elastic wires, and these two steel wires insulate under normal situation, when breaking out of fire, when scene temperature raises, has destroyed the insulation course of steel wire outside, and two steel wires are short-circuited, and alarm sends warning.This detector poor anti jamming capability, poor reliability, the part of reporting to the police needs excision, detects, safeguards difficulty, needs to select according to different object of protections the cable of different alarm temperatures, and versatility is poor.Also have the non-destructive alarm cables with the work of analog quantity mode that adopts four leads in addition, alarm temperature is adjustable, and fault-signal is complete.But because analog line type temperature-sensitive cable can only be with a certain local line segment as alarm unit; so it can't accurately locate out the alerting signal that a certain point produces; its part of reporting to the police needs excision to detect, safeguard difficulty simultaneously; need to select according to different object of protections the cable of different alarm temperatures, versatility is poor.Optical fiber type temperature-sensitive alarm cables can be set the alarm temperature point arbitrarily, can establish multistage type of alarms such as low-temperature warning, early warning and fire alarm, also can report to the police according to temperature rise rate.This system can carry out dynamic real-time monitoring to the residing change of temperature field of detector, and indicating positions and temperature value can be reported to the police and locate simultaneously the fire alarm on detector optional position and the sequential.System's antijamming capability is strong, the reliability height, but repetition of alarms detect, easy to maintenance, but the system principle complexity, particularly homemade goods is ripe not enough for product, Installation and Debugging difficulty, warning system investment cost costliness.The temperature detected by optical fiber alarm cables is not easy to carry out the topology expansion that many cable classifications connect in addition.
Summary of the invention
The objective of the invention is to overcome the deficiency of existing electric resistance cable type temperature-sensitive alarm cables and optical fiber type temperature-sensitive alarm cables, provide a kind of simple in structure, with low cost, intensity is high, temperature control is high, multistage temperature alarming, can carry out hierarchical topology expansion, installation line type temperature-sensitive fire alarm cable easily.
Another object of the present invention is to provide a kind of based on sensor network, bearing accuracy height, strong, the influenced by ambient temperature little line type temperature-sensitive fire alarm control unit of anti-electromagnetic interference capability.
The objective of the invention is to realize by following technological means:
A kind of line-type heat detector based on sensor network, its fire alarm cable central core is made of an earth lead, a power lead, a data line and at least one chip temperature sensor.Described chip temperature sensor has 3 pins, be respectively earth terminal, power input and data I/O pin, wherein the earth terminal pin links to each other with described earth lead, and the power input pin is connected with described power lead, and data I/O pin is connected with described data line.Each chip temperature sensor inside is divided into sequence number, ram in slice, EEPROM and four parts of temperature sensing, and the sequence number that each chip temperature sensor is corresponding only, so can adopt mode in parallel that a plurality of chip temperature sensors are connected on the same cable, thereby the realization multi-point temp is gathered in real time.
Can be wrapped with tetrafluoroethene band, metal mesh shield layer and the fire-retardant external sheath layer of fluoroplastic successively according to from inside to outside order on the described alarm cables central core.Tetrafluoroethene band, metal mesh shield layer can strengthen physical strength of the present invention and anti-electromagnetic interference capability, the stability of improving the quality of products, and it is coated not relate to metal alloy, oxide semi-conductive layer and temperature-sensitive alloy etc.; The fire-retardant external sheath layer of fluoroplastic makes appearance of the present invention more attractive in appearance, and water resistance is good, and resistance to aging is stronger, longer service life.
Line type temperature-sensitive fire alarm cable based on sensor network of the present invention linked to each other with fire alarm control unit then constitute a kind of fire detection alarm system based on sensor network.According to actual needs, can adopt at least one adapter to realize linear, tree-like, the star and the mesh topology expansion of described cable, thereby protection domain is enlarged.Described adapter has an input adapter, and one or more out splice going splices, each joint comprise three line ends that are used for connecting respectively earth lead, power lead and data line.
The principle of work of fire detection alarm system of the present invention is as follows:
Fire alarm control unit sends a negative pulse that satisfies specific time sequence by data line to the chip temperature sensor, makes that all chip temperature sensors carry out initial reset on the data line, prepares to receive user's sequence number access instruction; By data line, send a specific serial number codes then, the chip temperature sensor number consistent with command sequence is activated, and can accept the internal storage access order; Start all activation line chip temperature sensors and do temperature A/D conversion, read the temperature data after the conversion of chip temperature sensor one by one, realize that the temperature to line type temperature-sensitive fire alarm cable monitoring range reads, temperature survey and dynamic refresh.
Described fire alarm control unit adopts single-chip microcomputer as main control unit, monitors number, sequence number and the monitoring each point temperature thereof of the chip temperature sensor of every cable connection automatically, and information is preserved so that read.But its isolated operation also can send computing machine at a distance to by communication lines such as RS485, Ethernet, CAN buses, networks with PC.Can be according to accepting the instruction and data that host computer PC or input keyboard are sent, the response temperature parameter and the time parameter of arbitrary temp grade are set, carry out temperature survey and report to the police, be line style continuous probe, dynamic refresh temperature data thereby the present invention is surveyed, have and be quick on the draw, the alarm temperature wide ranges, alarm set point is easily adjusted, and reports to the police accurately, advantages such as reuse is good, and is non-maintaining.
Fire alarm cable alarm temperature grade can be set arbitrarily according to chip temperature sensor temperature-measuring range, single fire alarm cable detection range and warning bearing accuracy are by the sheet number and the spacing decision of chip temperature sensor, the warning bearing accuracy reaches as high as below the 0.5m, and detection range can reach thousands of rice.The present invention can produce and its length corresponding temperature value signal of chip temperature sensor point in the scope in one's power continuously automatically, and temperature information is accurately shown in real time, can not only allow the user measure the amplitude and the speed of temperature mutation, and can determine the zone of temperature mutation.
To sum up, the present invention has following useful effect:
(1) line type temperature-sensitive fire alarm cable of the present invention is made up of power lead, earth lead, single bus and some chip temperature sensors, skin has tetrafluoroethene band, metal mesh shield layer and the fire-retardant external sheath layer of extrusion molding material fluoroplastic, simple and reasonable for structure, anti-electromagnetic interference capability is strong, with low cost, do not relate to the coating of materials such as metal alloy, oxide semi-conductive layer and temperature-sensitive alloy, manufacture easily;
(2) expansion of line type temperature-sensitive fire alarm cable of the present invention and fire detection alarm system topology is easy to connect, can select the expansion of linear, tree-like, star and network shape topology arbitrarily, it is big to have a protection domain, surveys to be the line style continuous probe, be quick on the draw, arbitrarily advantage such as grading extension;
(3) the alarm temperature grade of warning system of the present invention can be set arbitrarily according to chip temperature sensor temperature-measuring range, the alarm temperature wide ranges, alarm set point is easily adjusted, report to the police accurately, single fire alarm cable detection range and warning bearing accuracy are by the sheet number and the spacing decision of chip temperature sensor, BURN-THROUGH RANGE can reach thousands of rice, and precision and optic fibre fire are surveyed cable and reached same grade, and the warning bearing accuracy reaches as high as below the 0.5m;
(4) warning system of the present invention is influenced by ambient temperature little, can be widely used in inflammable and explosive hazardous areas such as oil depot, gas station, silo;
(5) warning system of the present invention can also be applied to need to measure the place of temperature except can making fire alarm usefulness, uses as the temperature sensing detection system.
Description of drawings
Below in conjunction with drawings and the specific embodiments the present invention is described in further details.
Fig. 1 is based on the structural drawing of the line type temperature-sensitive fire alarm cable of sensor network
Fig. 2 is based on the sectional view of the line type temperature-sensitive fire alarm cable of sensor network
Fig. 3 is chip arrangement of temperature sensor figure
Fig. 4 is a linear temperature-sensing fire detecting warning system connection diagram
Fig. 5 is a line type temperature-sensitive fire alarm cable adapter synoptic diagram
Fig. 6 is a line type temperature-sensitive fire alarm cable topology expander graphs
Embodiment
With reference to figure 1 and Fig. 2, earth lead 1, power lead 2 and data line 3 and some chip temperature sensors 4 corresponding pins are connected, and tie point is carried out insulation processing; Earth lead 1, power lead 2, data line 3 are fit together with chip temperature sensor 4, band tetrafluoroethene layer 5 in twining on its outer surface, looping metal mesh shield layer 6 outside interior band tetrafluoroethene layer 5, the fire-retardant external sheath layer 7 of extrusion molding fluoroplastic outside metal mesh shield layer 6, thus formation is based on the fire alarm cable of sensor network.Realized that technology is simple, with low cost, do not related to metal alloy, coated, the enhance mechanical strength and the anti-electromagnetic interference capability of material such as oxide semi-conductive layer and temperature-sensitive alloy, the stability of improving the quality of products, and appearance is more attractive in appearance, water resistance is good, resistance to aging is stronger, advantages such as longer service life.
With reference to figure 3, chip temperature sensor 4 has three pins, is respectively earth terminal, power input and data I/O pin.Corresponding respectively earth lead 1, power lead 2 and the data line 3 that connects of each pin is connected.Chip temperature sensor 4 can convert temperature signal to serial digital signal, carries out information communication by single bus 3 and fire alarm control unit 9.Each chip temperature sensor inside is divided into four parts: sequence number, ram in slice, EEPROM and temperature sensing part.Because each chip temperature sensor all has one only one sequence number,, gather and the signal transmission thereby the realization multi-point temp is real-time so a plurality of chip temperature sensor can be connected on the same cable.
With reference to figure 4, chip temperature sensor 4 is connected with fire alarm control unit 9 with data line 3 by earth lead 1, power lead 2, forms warning system.Fire alarm control unit 9 passes through the sequence number and the corresponding temperature value of data line 3 real-time read sensors, and according to the temperature alarming thresholding of setting, carries out fire alarm and position display.Fire alarm cable alarm temperature grade can be set arbitrarily according to chip temperature sensor 4 temperature-measuring ranges, single fire alarm cable detection range and warning bearing accuracy are by the sheet number and the spacing decision of chip temperature sensor 4, the warning bearing accuracy reaches as high as below the 0.5m, and detection range can reach thousands of rice.Fire alarm control unit 9 is finished the collection of chip temperature sensor 4 states, can send data at a distance computing machine by communication lines such as RS485, Ethernet, CAN buses, is convenient to the system integration.It is big to have protection domain, and the line style continuous probe is quick on the draw, alarm temperature wide ranges, advantage such as alarm set point is easily adjusted, and reports to the police accurately, and reuse is good, and is non-maintaining.
With reference to figure 5, line type temperature-sensitive fire alarm cable is carried out cascade with adapter, adapter has an input adapter, wherein comprises to be used to connect three line ends that earth lead 1, power lead 2 are connected with data line 3; Have one or more out splice going splices, each out splice going splice comprises and is used to connect three line ends that earth lead 1, power lead 2 are connected with data line 3.By a plurality of adapters line type temperature-sensitive fire alarm cable is carried out linear, tree-like, star or mesh topology expansion.
With reference to figure 6, with multistage line type temperature-sensitive fire alarm cable, by earth lead 1, the power lead 2 and data line 3 corresponding link to each other of adapter 8 with cable, classification according to adapter connects, can carry out linear, tree-like, star and network shape topology expands to line type temperature-sensitive fire alarm cable, more multistage temperature sensing fire alarm cables is connected with alarm controller.The realization protection domain is big, and the application place is wide, can be used for numerous application places that need the monitoring of multiple branches fire alarm such as silo, oil depot.
Claims (4)
1, a kind of line-type heat detector based on sensor network, it is characterized in that, an earth lead (1) of the alarm cables central core of described line-type heat detector, a power lead (2), a data line (3) and at least one chip temperature sensor (4) link to each other, and wherein the earth terminal pin of chip temperature sensor (4), power input pin and data I/O end pin link to each other with earth lead (1), power lead (2) and data line (3) respectively.
2, the line-type heat detector based on sensor network according to claim 1, it is characterized in that, be tied with tetrafluoroethene band (5), metal mesh shield layer (6) and the fire-retardant external sheath layer of fluoroplastic (7) successively by from inside to outside direction on the described alarm cables central core.
3, a kind of line-type heat detector based on sensor network is characterized in that, comprises line type temperature-sensitive fire alarm cable as claimed in claim 1 or 2 and a fire alarm control unit (9) that is connected on this cable.
4, the line-type heat detector based on sensor network according to claim 1 is characterized in that, described line type temperature-sensitive fire alarm cable is realized linear, tree-like, star and netted topology expansion by adapter (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610022608 CN101030315A (en) | 2006-12-25 | 2006-12-25 | Linear temperature-sensing fire detector based on sensor network |
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| CN 200610022608 CN101030315A (en) | 2006-12-25 | 2006-12-25 | Linear temperature-sensing fire detector based on sensor network |
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| CN101030315A true CN101030315A (en) | 2007-09-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101794498A (en) * | 2010-02-10 | 2010-08-04 | 成都森盛智能科技有限公司 | Network system of temperature sensor |
| GB2578103A (en) * | 2018-10-15 | 2020-04-22 | Perry Of Oakley Holdings Ltd | An industrial crop dryer incorporating a fire detection system |
| CN111754717A (en) * | 2019-03-29 | 2020-10-09 | 空中客车运营有限公司 | Smoke and fire detection system and method and fire protection system |
-
2006
- 2006-12-25 CN CN 200610022608 patent/CN101030315A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101794498A (en) * | 2010-02-10 | 2010-08-04 | 成都森盛智能科技有限公司 | Network system of temperature sensor |
| GB2578103A (en) * | 2018-10-15 | 2020-04-22 | Perry Of Oakley Holdings Ltd | An industrial crop dryer incorporating a fire detection system |
| GB2578103B (en) * | 2018-10-15 | 2022-06-29 | Perry Of Oakley Holdings Ltd | An industrial crop dryer incorporating a fire detection system |
| CN111754717A (en) * | 2019-03-29 | 2020-10-09 | 空中客车运营有限公司 | Smoke and fire detection system and method and fire protection system |
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