CN105869339A - Line type heat fire detector - Google Patents
Line type heat fire detector Download PDFInfo
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- CN105869339A CN105869339A CN201610437968.XA CN201610437968A CN105869339A CN 105869339 A CN105869339 A CN 105869339A CN 201610437968 A CN201610437968 A CN 201610437968A CN 105869339 A CN105869339 A CN 105869339A
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- 238000012545 processing Methods 0.000 claims abstract description 67
- 238000012544 monitoring process Methods 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 19
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- 239000000523 sample Substances 0.000 claims description 70
- 239000000463 material Substances 0.000 claims description 18
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- 230000008569 process Effects 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 6
- 241001325280 Tricardia watsonii Species 0.000 claims description 4
- 239000000779 smoke Substances 0.000 claims description 4
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 238000013316 zoning Methods 0.000 abstract description 2
- 238000009529 body temperature measurement Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
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- 241001269238 Data Species 0.000 description 1
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- 238000005253 cladding Methods 0.000 description 1
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- 239000004615 ingredient Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000011540 sensing material Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0014—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation from gases, flames
- G01J5/0018—Flames, plasma or welding
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
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Abstract
The invention provides a line type heat fire detector. The line type heat fire detector comprises a signal processing unit and a sensitive component, wherein the sensitive component is connected with the signal processing unit; the sensitive component comprises one-stage or multi-stage detecting units; the detecting unit in each stage corresponds to one address region in field monitoring; a first-stage detecting unit is connected with the signal processing unit, and starting from a second-stage detecting unit, other detecting units are sequentially in cascade connection; the signal processing unit is used for supplying power to and sending an order to the detecting units, and each detecting unit is used for sending monitoring information, which is obtained by the detecting unit and at least comprises temperature data information, to the signal processing unit. The line type heat fire detector provided by the invention has the advantages that the cost is low, the detection range is wide, a zoning monitoring function is obtained, non-contact temperature measurement can be realized, and electromagnetic interference brought by contact type installation is avoided; the anti-electromagnetic interference ability and the early fire response ability are stronger.
Description
Technical field
The present invention relates to a kind of fire detector, the Multivariate combined-type linear temperature-sensing fire detector in a kind of safety engineering discipline.
Background technology
Line-type heat detector ripe in the industrial circles such as electric power, metallurgy, petrochemical industry is applied mainly to have 3 kinds at present: on-off value linear constant temperature fire detector, analog linetype temperature-fixing fire detecting device and analog linear different constant temperature fire detector.These 3 kinds of detectors all use temperature sensing material to be processed into cable; the structure of outer cladding sheath; detection mechanism is usually impedance variation principle; i.e. detector uses the cable material with distinct temperature coefficient to make; when the ambient temperature of detector protection zone changes; the impedance of cable changes the most accordingly, and testing circuit is according to the impedance variation of cable, it is judged that whether scene has fire to occur.Although some line-type heat detectors realize two-parameter or measuring multiple parameters by the quantity increasing internal temperature-sensitive cable, but its structure and detection mechanism do not have the change of essence.
Line-type heat detector is in current engineer applied; it is primarily present following problem: one is to be restricted by structure and detection mechanism, and the radius of protection of a detector is limited, so limiting the protection domain of detector; add engineering equipment cost, reduce engineer applied cost performance.Two is owing to application places is mostly strong electromagnetic place, line-type heat detector is easily by electromagnetic interference, in order to prevent false alarm, detector sensitivity is turned down, although part place is mounted with analog linear different constant temperature fire detector, the simpliest shields differential temperature function, only retain constant temperature warning function, cause detector cannot realize early fire detection, delay optimal warning and fire fighting and rescue opportunity.Three Effect on Detecting being to ensure that line-type heat detector, it is achieved the early detection of fire is reported to the police, project installation uses the mounting means that contact is laid, and the manner is readily incorporated electromagnetic interference, is also unfavorable for engineering maintenance and maintenance.Four is that currently used line-type heat detector does not possess monitored area temperature and warning position display function, therefore limits use length and the application places of detector.
Due to the existence of the problems referred to above, greatly limit the range of application of line-type heat detector, have impact on the fire responding ability in early days of detector.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of line-type heat detector, have low cost, investigative range is wide, possesses zoning monitoring function, it is possible to realize contactless temperature-measuring, it is to avoid contact installs the electromagnetic interference brought；There is stronger anti-electromagnetic interference capability and incipient fire responding ability；The technical solution used in the present invention is:
A kind of line-type heat detector, including signal processing unit, also includes the sensing unit being connected with signal processing unit；Described sensing unit includes one or more levels probe unit；Each class survey unit is corresponding to an address section of field monitoring；First order probe unit is connected with signal processing unit, from the beginning of the probe unit of the second level, and cascade successively；Signal processing unit is for powering to probe unit and sending order, and the monitoring information at least including temperature data information that this probe unit is obtained by probe unit is sent to signal processing unit.
Further, described signal processing unit is provided with terminal resistance R；
Described probe unit includes sensing cable and the TU Trunk Unit with temperature-sensitive ability；
Sensing cable includes two power supplys and signal multiplexing cable and two temperature-sensitive cables；Temperature-sensitive cable is separately provided with signal multiplexing cable with power supply, or at least power supply and signal multiplexing cable multiplexing temperature-sensitive cable；
A terminal resistance R is included equally in TU Trunk Unit；
TU Trunk Unit include front terminal row X and rear terminal row Y, and level shifting circuit, signal decoding circuit, response control circuit, cable signal sample circuit, filter circuit, amplifying circuit, microcontroller circuit, at least one detect sensor；Microcontroller circuit includes microcontroller and address encoding unit, has the unique address of TU Trunk Unit in this class survey unit in address encoding unit；Address in address encoding unit is corresponding with the address section of field monitoring；
The front end of two temperature-sensitive cables in first order probe unit connects the terminal resistance R two ends in signal processing unit, and the rear end of two temperature-sensitive cables connects the cable signal sample circuit of this grade；From the beginning of the probe unit of the second level, the front end of two temperature-sensitive cables in the probe unit of this grade connects terminal resistance R two ends in upper level probe unit, and the rear end of two temperature-sensitive cables connects the cable signal sample circuit of this grade；The analog temperature signal of cable signal sample circuit collection is by transmitting to microcontroller after filter circuit and amplifying circuit；
In TU Trunk Unit, the first terminal in front terminal row X, the second terminal arrange the first terminal in Y, the second terminal short circuit with rear terminal respectively；
Two power supplys in first order probe unit are connected signal processing unit with the front end of signal multiplexing cable, and rear end connects the front terminal row the first terminal of X, the second terminal in the TU Trunk Unit of this grade respectively；From the beginning of the probe unit of the second level, two power supplys in the probe unit of this grade are connected in the TU Trunk Unit of upper level rear terminal the row the first terminal of Y, the second terminal respectively with the front end of signal multiplexing cable, and rear end connects front terminal the row the first terminal of X, the second terminal in the TU Trunk Unit of this grade respectively；
The signal sent from signal processing unit, TU Trunk Unit is sent to by power supply and signal multiplexing cable, export to signal decoding circuit after being connected to level shifting circuit by the first terminal in front terminal row X, the second terminal, signal decoding circuit outputs signal to microcontroller input, the response message of microcontroller is transferred to two power supplys and signal multiplexing cable by the output of response control circuit to front terminal the row the first terminal of X, the second terminal, it is back to signal processing unit, it is achieved TU Trunk Unit and the bidirectional data transfers of signal processing unit；
Detection sensor in TU Trunk Unit at least includes a temperature sensor, and temperature sensor connects microcontroller.
It is an advantage of the current invention that:
1, the TU Trunk Unit that the present invention relates to, its built-in infrared temperature sensor and/or semiconductor temperature sensor, it is integrated on the sensing unit of line-type heat detector, match with temperature-sensitive cable, achieve two kinds of mechanism diverse temperature detection modes, both the characteristic of the continuous temperature-sensitive of line type fire detector had been remained, add infrared temperature sensor and/or semiconductor temperature sensor simultaneously, so remote non-contact measurement can be realized, line-type heat detector is made to work in higher grade of sensitivity, it is greatly improved incipient fire responding ability and the warning accuracy of line-type heat detector.
2, the line-type heat detector that the present invention relates to can use contactless mounting means; can effectively avoid electromagnetic interference; the protection domain of detector is expanded while reducing rate of false alarm; improve the engineering adaptability of detector; comparing with existing fire detector, engineering equipment cost can reduce by more than 50%.
3, the line-type heat detector that the present invention relates to can realize subregion positioning function, therefore can be accurately positioned incipient fire position so that monitoring personnel timely and effective can take treatment measures；
4, cascade installs the use length that improve detector, can expand products application place；And cascade is installed and is made site operation more convenient, can determine the total length after cascade according to customer demand；
5, carry out data transmission in real time between TU Trunk Unit and signal processing unit, real-time, flexible configuration, good stability, the requirement of Different field can be met, applied widely.
Accompanying drawing explanation
Fig. 1 is the structure composition schematic diagram of the quad of the present invention.
Fig. 2 is the sensing cable schematic diagram of the quadrature arrangement of the present invention.
Fig. 3 is the sensing cable schematic diagram of the three-core structure of the present invention.
Fig. 4 is the sensing cable schematic diagram of the two-chip structure of the present invention.
Fig. 5 is the structural representation of the TU Trunk Unit of the present invention.
Fig. 6 is a kind of integrated form schematic diagram of the sensing unit of the present invention.
Fig. 7 is the structure composition schematic diagram of three heart yearns of the present invention.
Fig. 8 is the structure composition schematic diagram of two heart yearns of the present invention.
Fig. 9 is that the sensing cable of the present invention passes through pluggable terminals connection diagram with TU Trunk Unit.
Figure 10 is the signal processing unit routine inspection mode flow chart of the present invention.
Figure 11 is the TU Trunk Unit software flow pattern of the present invention.
Detailed description of the invention
Below in conjunction with concrete drawings and Examples, the invention will be further described.
The deficiency existed for current line-type heat detector, several TU Trunk Units integrated on the temperature-sensitive cable of line-type heat detector can be used, form a kind of low cost and there is the Multivariate combined-type linear temperature-sensing fire detector of stronger anti-electromagnetic interference capability and incipient fire responding ability to solve more existing problems.
As it is shown in figure 1, the line-type heat detector that the present invention provides, the sensing unit being connected with signal processing unit including signal processing unit；In Fig. 1, signal processing unit right-hand side assembly is sensing unit ingredient；
Sensing unit is generally formed by multistage probe unit cascade；In the case of the shortest, sensing unit can also only have one-level probe unit and constitute, but the most less appearance；Each class survey unit is corresponding to an address section of field monitoring；First order probe unit is connected with signal processing unit, from the beginning of the probe unit of the second level, and cascade successively；Signal processing unit is for powering to probe unit and sending order, and the monitoring information at least including temperature data information that this probe unit is obtained by probe unit is sent to signal processing unit.
Probe unit includes sensing cable 1 and the TU Trunk Unit 2 with temperature-sensitive ability；At monitoring field, arranging a TU Trunk Unit 2 at a certain distance, spaced apart can be 0.5～200m；Being coupled together by sensing cable 1 between TU Trunk Unit 2, the TU Trunk Unit 2 of first order probe unit is connected with signal processing unit by sensing cable 1；At most can reach 2048 TU Trunk Units, say, that at most allow 2048 probe unit cascades；
Sensing cable 1 includes two power supplys and signal multiplexing cable 101 and two temperature-sensitive cables 102；
Sensing cable 1 can use quadrature arrangement, as in figure 2 it is shown, include the first heart yearn 1a, the second heart yearn 1b, the 3rd heart yearn 1c and quad 1d；Quad is conductor；First heart yearn 1a and the second heart yearn 1b appearance parcel insulant, as two power supplys and signal multiplexing cable 101；3rd heart yearn 1c and quad 1d appearance parcel NTC negative temperature coefficient material 1e, and the 3rd the NTC negative temperature coefficient material of heart yearn 1c and quad 1d appearance connect continuously or be connected as a single entity, there is interval between 3rd heart yearn 1c and quad 1d, constitute two temperature-sensitive cables 102；The most when the temperature is changed, the NTC material resistance between the 3rd heart yearn 1c and quad 1d line raises with temperature and declines, and forms the temperature-sensitive cable with sense of continuity temperature function；Quad additional waterproof insulation set 3；Quad can be arranged in parallel as shown in Figure 2 or be twisted into lay configuration；
Sensing cable 1 may be used without three-core structure, as it is shown on figure 3, include the first heart yearn 1a, the second heart yearn 1b, the 3rd heart yearn 1c；Three heart yearns are conductor, and the first heart yearn 1a appearance parcel insulant, as a power supply and signal multiplexing cable 101；Second heart yearn 1b and the 3rd heart yearn 1c appearance parcel NTC negative temperature coefficient material 1e, the NTC negative temperature coefficient material of the second heart yearn 1b and the 3rd heart yearn 1c appearance connects continuously or is connected as a single entity, there is interval between the second heart yearn 1b and the 3rd heart yearn 1c, constitute two temperature-sensitive cables 102；Second heart yearn 1b concurrent multiplexing of appearance parcel NTC negative temperature coefficient material, uses with signal multiplexing cable 101 as another root power supply；Three heart yearns can be arranged in parallel as shown in Figure 3 or be twisted into lay configuration；
Sensing cable 1 may be used without two-chip structure, as shown in Figure 4, including the first heart yearn 1a, the second heart yearn 1b；Two heart yearns are conductor；First heart yearn 1a and the second heart yearn 1b appearance parcel NTC negative temperature coefficient material 1e, and first the NTC negative temperature coefficient material of heart yearn 1a and the second heart yearn 1b appearance connect continuously or be connected as a single entity, there is interval between first heart yearn 1a and the second heart yearn 1b, constitute two temperature-sensitive cables 102；Two power supplys and signal multiplexing cable 101 and the multiplexing of two temperature-sensitive cables 102；Two heart yearns can be arranged in parallel as shown in Figure 4 or be twisted into lay configuration；
In first order probe unit, the terminal resistance R of temperature-sensitive cable 102 is arranged on signal processing unit.Include a terminal resistance R in each TU Trunk Unit 2 equally, connect for the temperature-sensitive cable 102 in rear stage probe unit；
As it is shown in figure 5, TU Trunk Unit 2 includes front terminal row X and rear terminal row Y, and level shifting circuit, signal decoding circuit, response control circuit, cable signal sample circuit, filter circuit, amplifying circuit, microcontroller circuit and respectively detect sensor；Microcontroller circuit includes microcontroller and address encoding unit, has the unique address of TU Trunk Unit 2 in this class survey unit in address encoding unit；Address in address encoding unit is corresponding with the address section of field monitoring；Having four terminals on front terminal row X, terminal 1, terminal 2, terminal 3, terminal 4 are that front terminal arranges the first terminal of X, the second terminal, the 3rd terminal, the 4th terminal respectively；Also having four terminals, terminal a, terminal b, terminal c, terminal d on rear terminal row Y is that rear terminal arranges the first terminal of Y, the second terminal, the 3rd terminal, the 4th terminal respectively；Detection sensor in TU Trunk Unit 2 includes infrared temperature sensor, semiconductor temperature sensor, Smoke Sensor, harmful gas sensor (such as firedamp sensor), flame sensor etc.；Owing to Fig. 5 scope of charting is limited, only depict infrared temperature sensor, semiconductor temperature sensor；Front terminal row's terminal 1 of X, terminal 2 and rear terminal row the terminal a of Y, terminal b short circuit respectively in TU Trunk Unit；Terminal resistance R two ends in TU Trunk Unit connect rear terminal row the 3rd terminal of Y, the 4th terminal；The input of level shifting circuit connects front terminal the row the first terminal of X, the second terminal；The input of cable signal sample circuit connects front terminal row the 3rd terminal of X, the 4th terminal；
When sensing cable 1 uses quadrature arrangement, as it is shown in figure 1, TU Trunk Unit 2 and the explanation of signal processing unit connected mode:
In first order probe unit, the front end of the first heart yearn 1a and the second heart yearn 1b of sensing cable 1 connects signal processing unit, and rear end is connected respectively on front terminal the row the first terminal of X, second terminal of the TU Trunk Unit of this grade；The front end of the 3rd heart yearn 1c and quad 1d of sensing cable 1 connects the two ends of resistance R on signal processing unit, and rear end is connected respectively to front terminal row the 3rd terminal of X, the 4th terminal of the TU Trunk Unit of this grade, thus connects cable signal sample circuit；
From the beginning of the probe unit of the second level, the front end of the first heart yearn 1a and the second heart yearn 1b that sense cable 1 in this class survey unit connects rear terminal the row the first terminal of Y, second terminal of the TU Trunk Unit of upper level respectively, and the rear end of the first heart yearn 1a and the second heart yearn 1b connects TU Trunk Unit front terminal the row the first terminal of X, second terminal of this grade respectively；The front end of the 3rd heart yearn 1c and quad 1d of sensing cable 1 connects rear terminal row the 3rd terminal of Y, the 4th terminal of the TU Trunk Unit of upper level respectively, and the rear end of the 3rd heart yearn 1c and quad 1d connects TU Trunk Unit front terminal row the 3rd terminal of X, the 4th terminal of this grade respectively；
When sensing cable 1 uses three-core structure, as it is shown in fig. 7, TU Trunk Unit 2 and the explanation of signal processing unit connected mode:
In first order probe unit, the front end of the first heart yearn 1a and the second heart yearn 1b of sensing cable 1 connects signal processing unit, and rear end is connected respectively on front terminal the row the first terminal of X, second terminal of the TU Trunk Unit of this grade；The front end of the second heart yearn 1b and the 3rd heart yearn 1c of sensing cable 1 connects the two ends of resistance R on signal processing unit, and rear end is connected respectively to front terminal row second terminal of X, the 3rd terminal of the TU Trunk Unit of this grade；
From the beginning of the probe unit of the second level, the front end of the first heart yearn 1a and the second heart yearn 1b that sense cable 1 in this class survey unit connects rear terminal the row the first terminal of Y, second terminal of the TU Trunk Unit of upper level respectively, and the rear end of the first heart yearn 1a and the second heart yearn 1b connects TU Trunk Unit front terminal the row the first terminal of X, second terminal of this grade respectively；The front end of the 3rd heart yearn 1c of sensing cable 1 connects the 3rd terminal of the rear terminal row Y of the TU Trunk Unit of upper level, and the rear end of the 3rd heart yearn 1c connects the 3rd terminal of the TU Trunk Unit front terminal row X of this grade；
In each TU Trunk Unit, front terminal row the second of X, the 4th terminal short circuit；Rear terminal row the second of Y, the 4th terminal short circuit；
When sensing cable 1 uses two-chip structure, as shown in Figure 8, TU Trunk Unit 2 and the explanation of signal processing unit connected mode:
In first order probe unit, the front end of the first heart yearn 1a and the second heart yearn 1b of sensing cable 1 connects signal processing unit and connects with the two ends of resistance R on signal processing unit；The rear end of the first heart yearn 1a and the second heart yearn 1b is connected respectively to front terminal the row the first terminal of X, second terminal of the TU Trunk Unit of this grade；
From the beginning of the probe unit of the second level, the front end of the first heart yearn 1a and the second heart yearn 1b that sense cable 1 in this class survey unit connects rear terminal the row the first terminal of Y, second terminal of the TU Trunk Unit of upper level respectively, and the rear end of the first heart yearn 1a and the second heart yearn 1b connects TU Trunk Unit front terminal the row the first terminal of X, second terminal of this grade respectively；
In each TU Trunk Unit, front terminal row the first of X, the 3rd terminal short circuit, the second, the 4th terminal short circuit；Rear terminal row the first of Y, the 3rd terminal short circuit, the second, the 4th terminal short circuit；
The signal sent from signal processing unit, TU Trunk Unit is sent to by power supply and signal multiplexing cable 101, the first terminal in X is arranged by the front terminal of every one-level TU Trunk Unit, second terminal exports to signal decoding circuit after being connected to level shifting circuit, signal decoding circuit outputs signal to microcontroller input, the response message of microcontroller is by the first terminal of response control circuit output to front terminal row X, two power supplys and signal multiplexing cable 101 it is transferred to after second terminal, it is back to signal processing unit, realize the bidirectional data transfers of TU Trunk Unit 2 and signal processing unit；The output of the detection sensor such as infrared temperature sensor, semiconductor temperature sensor, Smoke Sensor, harmful gas sensor connects microcontroller, microcontroller is controlled by software, realize the signals collecting to various detection sensing datas, and signal processing unit can be returned to；
Terminal resistance R is conducive to detecting the variations in temperature of an on-the-spot section, and under room temperature, the resistance of the NTC material between two heart yearns of temperature-sensitive cable 102 is very big, is unfavorable for constituting loop；After connecting terminal resistance R, the initial resistance of cable signal sampling circuit samples is substantially equal to R, along with temperature rises, between heart yearn, NTC material resistance diminishes, the resistance being equivalent to terminal resistance R two ends in parallel diminishes, then the resistance at temperature-sensitive cable two ends diminishes, cable signal sample circuit is by the resistance at temperature-sensitive cable two ends of sampling, it is changed into corresponding voltage signal, and after filtering, the voltage range that microcontroller can be sampled is become after amplifying circuit, microcontroller is by sampling this voltage signal carry out correlation analysis and algorithm process, extrapolate the change of resistance, thus extrapolate the value of information of temperature；
Sensing cable 1 can be by being welded to connect with TU Trunk Unit 2, or connected by pluggable terminals, as it is shown in figure 9, set public plug 4 and mother socket 5 respectively on the such as termination of sensing cable 1 and the terminal block of TU Trunk Unit 2, when connecting, as long as pluggable terminals being coupled together the most permissible；
When sensing cable 1 is welded to connect with TU Trunk Unit 2, sensing unit has two kinds of integrated forms；The first is, such as Fig. 7 or as depicted in figure 8, TU Trunk Unit 2 adds shell in order to protect, and the detection sensor corresponding site windowing on shell exposing needs so that such as infrared temperature sensor exposes；Sensing cable 1 outer layer adds waterproof insulation set 3；The second is, as shown in Figure 6, after the heart yearn of sensing cable 1 welds with the terminal block terminal of TU Trunk Unit 2, on all sensing cables 1 and TU Trunk Unit 2, the unified waterproof insulation that adds overlaps 3, process stranding together, and make to need the detection sensor exposed to expose at cable uplifting window；
Sensing cable 1 is when being connected by pluggable terminals with TU Trunk Unit 2, and the common integrated form of sensing unit is, TU Trunk Unit 2 adds shell in order to protect, and to needing detection sensor corresponding site windowing on shell of exposing；Sensing cable 1 outer layer adds waterproof insulation set 3；The advantage of pluggable terminals integration mode is, facilitates TU Trunk Unit later period maintenance and replacement, and motility is high, disadvantageously, its tensile property does not use welding procedure integration mode good.In actual applications, choosing of technique and structure can be carried out according to practical situation；
Signal processing unit and TU Trunk Unit 2 are carried out the transmitted in both directions of data by the first heart yearn of sensing cable 1 and the second heart yearn and are communicated, and signal processing unit is powered to TU Trunk Unit 2 by the first heart yearn and the second heart yearn and sent order；
For i-th section of probe unit, TU Trunk Unit i obtains the temperature-sensitive cable i signal with variation of ambient temperature, after process, information is returned to signal processing unit by the first heart yearn and the second heart yearn, the presence states information that signal processing unit returns according to TU Trunk Unit i, corresponding status information is sent out, including operation, fault, State of alarm information after carrying out a series of process.
Temperature-sensitive cable i has the function at monitored section (i.e. an address section of field monitoring) temperature-sensitive continuously, and TU Trunk Unit 2 has the non-contact high-sensitivity temperature sensing function in TU Trunk Unit 2 position；TU Trunk Unit can use infrared temperature sensor and/or semiconductor temperature sensor to realize non-contact temperature measuring, compensate for the deficiency of the mounting means that temperature-sensitive cable must use contact to lay；Other Smoke Sensor, harmful gas sensor etc. also can be set in TU Trunk Unit, it is achieved the monitoring of on-the-spot multiple ambient condition；
For the sensing unit of the present invention, the probe unit of cascade can realize subregion position monitor, monitoring silicon carbide and display alarm position, and cascade is also beneficial to improve the length of fire detector；
Signal processing unit routine inspection mode communication process illustrates, as shown in Figure 10: arrange unique address in advance each TU Trunk Unit i, is designated as add_i, i≤2048, in each polling period, numbers ascending order according to TU Trunk Unit and patrol and examine successively；Signal processing unit sending mode position and address bit add_i, mode bit represents concrete and patrols and examines order, TU Trunk Unit receives mode bit and address bit add_i information, after the address bit matches of self, the monitoring information including temperature data information that this TU Trunk Unit is obtained by corresponding TU Trunk Unit i is sent back to as response message, signal processing unit receives the response message of TU Trunk Unit i loopback, and be correspondingly processed, then carrying out patrolling and examining of next TU Trunk Unit, it patrols and examines process ibid；After all of TU Trunk Unit has been patrolled and examined by signal processing unit successively, a polling period terminates, and enters next polling period, and the process of each polling period is ibid.
TU Trunk Unit software flow explanation, as shown in figure 11: the microcontroller of TU Trunk Unit is the most in a dormant state, it is waken up when signal processing unit sends and patrols and examines order, start to receive mode bit and address bit, after the address bit received mates with the machine address add_i, by the monitoring information including temperature data information of acquisition back to signal processing unit, microcontroller starts to gather new temperature data, prepare for data communication next time after process, reenter resting state afterwards.Due to time-sharing work and the dormancy working method of microcontroller, making the power consumption of TU Trunk Unit effectively reduce, substantially increase the load capacity of signal processing unit, on the premise of guaranteeing fire alarm response real-time, the quantity of TU Trunk Unit is up to 2048.
Claims (9)
1. a line-type heat detector, including signal processing unit, it is characterised in that: also include the sensing unit being connected with signal processing unit；
Described sensing unit includes one or more levels probe unit；Each class survey unit is corresponding to an address section of field monitoring；First order probe unit is connected with signal processing unit, from the beginning of the probe unit of the second level, and cascade successively；
Signal processing unit is for powering to probe unit and sending order, and the monitoring information at least including temperature data information that this probe unit is obtained by probe unit is sent to signal processing unit.
2. line-type heat detector as claimed in claim 1, it is characterised in that:
Described signal processing unit is provided with terminal resistance R；
Described probe unit includes sensing cable (1) and the TU Trunk Unit (2) with temperature-sensitive ability；
Sensing cable (1) includes two power supplys and signal multiplexing cable (101) and two temperature-sensitive cables (102)；Temperature-sensitive cable (102) is separately provided with signal multiplexing cable (101) with power supply, or at least power supply and signal multiplexing cable (101) multiplexing temperature-sensitive cable (102)；
A terminal resistance R is included equally in TU Trunk Unit (2)；
TU Trunk Unit (2) include front terminal row X and rear terminal row Y, and level shifting circuit, signal decoding circuit, response control circuit, cable signal sample circuit, filter circuit, amplifying circuit, microcontroller circuit, at least one detect sensor；Microcontroller circuit includes microcontroller and address encoding unit, has the unique address of TU Trunk Unit (2) in this class survey unit in address encoding unit；Address in address encoding unit is corresponding with the address section of field monitoring；
The front end of two temperature-sensitive cables (102) in first order probe unit connects the terminal resistance R two ends in signal processing unit, and the rear end of two temperature-sensitive cables (102) connects the cable signal sample circuit of this grade；From the beginning of the probe unit of the second level, the front end of two temperature-sensitive cables (102) in the probe unit of this grade connects terminal resistance R two ends in upper level probe unit, and the rear end of two temperature-sensitive cables (102) connects the cable signal sample circuit of this grade；The analog temperature signal of cable signal sample circuit collection is by transmitting to microcontroller after filter circuit and amplifying circuit；
In TU Trunk Unit, the first terminal in front terminal row X, the second terminal arrange the first terminal in Y, the second terminal short circuit with rear terminal respectively；
Two power supplys in first order probe unit are connected signal processing unit with the front end of signal multiplexing cable (101), and rear end connects the front terminal row the first terminal of X, the second terminal in the TU Trunk Unit (2) of this grade respectively；From the beginning of the probe unit of the second level, two power supplys in the probe unit of this grade are connected in the TU Trunk Unit (2) of upper level rear terminal the row the first terminal of Y, the second terminal respectively with the front end of signal multiplexing cable (101), and rear end connects front terminal the row the first terminal of X, the second terminal in the TU Trunk Unit (2) of this grade respectively；
The signal sent from signal processing unit, TU Trunk Unit is sent to by power supply and signal multiplexing cable (101), by the first terminal in front terminal row X, second terminal exports to signal decoding circuit after being connected to level shifting circuit, signal decoding circuit outputs signal to microcontroller input, the response message of microcontroller is by the first terminal of response control circuit output to front terminal row X, two power supplys and signal multiplexing cable (101) it is transferred to after second terminal, it is back to signal processing unit, realize the bidirectional data transfers of TU Trunk Unit (2) and signal processing unit；
Detection sensor in TU Trunk Unit (2) at least includes a temperature sensor, and temperature sensor connects microcontroller.
3. line-type heat detector as claimed in claim 2, it is characterised in that:
Sensing cable (1) uses quadrature arrangement, including the first heart yearn (1a), the second heart yearn (1b), the 3rd heart yearn (1c) and quad (1d)；Quad is conductor；First heart yearn (1a) and the second heart yearn (1b) appearance parcel insulant, as two power supplys and signal multiplexing cable (101)；3rd heart yearn (1c) and quad (1d) appearance parcel NTC negative temperature coefficient material (1e), and the 3rd the NTC negative temperature coefficient material of heart yearn (1c) and quad (1d) appearance connect continuously or be connected as a single entity, there is interval between 3rd heart yearn (1c) and quad (1d), constitute two temperature-sensitive cables (102)；
Terminal resistance R two ends in TU Trunk Unit connect rear terminal row the 3rd terminal of Y, the 4th terminal；The input of level shifting circuit connects front terminal the row the first terminal of X, the second terminal；The input of cable signal sample circuit connects front terminal row the 3rd terminal of X, the 4th terminal；
In first order probe unit, first heart yearn (1a) of sensing cable (1) and the front end of the second heart yearn (1b) connect signal processing unit, and rear end is connected respectively on front terminal the row the first terminal of X, second terminal of the TU Trunk Unit of this grade；3rd heart yearn (1c) of sensing cable (1) and the front end of quad (1d) connect the two ends of resistance R on signal processing unit, rear end is connected respectively to front terminal row the 3rd terminal of X, the 4th terminal of the TU Trunk Unit of this grade, thus connects cable signal sample circuit；
From the beginning of the probe unit of the second level, the front end of the first heart yearn (1a) and the second heart yearn (1b) that sense cable (1) in this class survey unit connects rear terminal the row the first terminal of Y, second terminal of the TU Trunk Unit of upper level respectively, and the rear end of the first heart yearn (1a) and the second heart yearn (1b) connects TU Trunk Unit front terminal the row the first terminal of X, second terminal of this grade respectively；3rd heart yearn (1c) of sensing cable (1) and the front end of quad (1d) connect rear terminal row the 3rd terminal of Y, the 4th terminal of the TU Trunk Unit of upper level respectively, and the rear end of the 3rd heart yearn (1c) and quad (1d) connects TU Trunk Unit front terminal row the 3rd terminal of X, the 4th terminal of this grade respectively.
4. line-type heat detector as claimed in claim 2, it is characterised in that:
Sensing cable (1) uses three-core structure, including the first heart yearn (1a), the second heart yearn (1b), the 3rd heart yearn (1c)；Three heart yearns are conductor, and the first heart yearn (1a) appearance parcel insulant, as a power supply and signal multiplexing cable (101)；Second heart yearn (1b) and the 3rd heart yearn (1c) appearance parcel NTC negative temperature coefficient material (1e), the NTC negative temperature coefficient material of the second heart yearn (1b) and the 3rd heart yearn (1c) appearance connects continuously or is connected as a single entity, there is interval between the second heart yearn (1b) and the 3rd heart yearn (1c), constitute two temperature-sensitive cables (102)；Second heart yearn (1b) concurrent multiplexing of appearance parcel NTC negative temperature coefficient material, as another root power supply and signal multiplexing cable (101)；
Terminal resistance R two ends in TU Trunk Unit connect rear terminal row the 3rd terminal of Y, the 4th terminal；The input of level shifting circuit connects front terminal the row the first terminal of X, the second terminal；The input of cable signal sample circuit connects front terminal row the 3rd terminal of X, the 4th terminal；
In first order probe unit, first heart yearn (1a) of sensing cable (1) and the front end of the second heart yearn (1b) connect signal processing unit, and rear end is connected respectively on front terminal the row the first terminal of X, second terminal of the TU Trunk Unit of this grade；Second heart yearn (1b) of sensing cable (1) and the front end of the 3rd heart yearn (1c) connect the two ends of resistance R on signal processing unit, and rear end is connected respectively to front terminal row second terminal of X, the 3rd terminal of the TU Trunk Unit of this grade；
From the beginning of the probe unit of the second level, the front end of the first heart yearn (1a) and the second heart yearn (1b) that sense cable (1) in this class survey unit connects rear terminal the row the first terminal of Y, second terminal of the TU Trunk Unit of upper level respectively, and the rear end of the first heart yearn (1a) and the second heart yearn (1b) connects TU Trunk Unit front terminal the row the first terminal of X, second terminal of this grade respectively；The front end of the 3rd heart yearn (1c) of sensing cable (1) connects the 3rd terminal of the rear terminal row Y of the TU Trunk Unit of upper level, and the rear end of the 3rd heart yearn (1c) connects the 3rd terminal of the TU Trunk Unit front terminal row X of this grade；
In each TU Trunk Unit, front terminal row the second of X, the 4th terminal short circuit；Rear terminal row the second of Y, the 4th terminal short circuit.
5. line-type heat detector as claimed in claim 2, it is characterised in that:
Sensing cable (1) uses two-chip structure, including the first heart yearn (1a), the second heart yearn (1b)；Two heart yearns are conductor；First heart yearn (1a) and the second heart yearn (1b) appearance parcel NTC negative temperature coefficient material (1e), and first the NTC negative temperature coefficient material of heart yearn (1a) and the second heart yearn (1b) appearance connect continuously or be connected as a single entity, there is interval between first heart yearn (1a) and the second heart yearn (1b), constitute two temperature-sensitive cables (102)；Two power supplys and signal multiplexing cable (101) and the multiplexing of two temperature-sensitive cables (102)；
Terminal resistance R two ends in TU Trunk Unit connect rear terminal row the 3rd terminal of Y, the 4th terminal；The input of level shifting circuit connects front terminal the row the first terminal of X, the second terminal；The input of cable signal sample circuit connects front terminal row the 3rd terminal of X, the 4th terminal；
In first order probe unit, first heart yearn (1a) of sensing cable (1) and the front end of the second heart yearn (1b) connect signal processing unit and connect with the two ends of resistance R on signal processing unit；The rear end of the first heart yearn (1a) and the second heart yearn (1b) is connected respectively to front terminal the row the first terminal of X, second terminal of the TU Trunk Unit of this grade；
From the beginning of the probe unit of the second level, the front end of the first heart yearn (1a) and the second heart yearn (1b) that sense cable (1) in this class survey unit connects rear terminal the row the first terminal of Y, second terminal of the TU Trunk Unit of upper level respectively, and the rear end of the first heart yearn (1a) and the second heart yearn (1b) connects TU Trunk Unit front terminal the row the first terminal of X, second terminal of this grade respectively；
In each TU Trunk Unit, front terminal row the first of X, the 3rd terminal short circuit, the second, the 4th terminal short circuit；Rear terminal row the first of Y, the 3rd terminal short circuit, the second, the 4th terminal short circuit.
6. the line-type heat detector as described in claim 2,3,4 or 5, it is characterised in that:
Sensing cable (1) and TU Trunk Unit (2) are by being welded to connect, or are connected by pluggable terminals.
7. line-type heat detector as claimed in claim 6, it is characterised in that:
When sensing cable (1) and TU Trunk Unit (2) are welded to connect, sensing unit includes following integrated form；
The first is, TU Trunk Unit (2) adds shell in order to protect, and the detection sensor corresponding site windowing on shell exposing needs；Sensing cable (1) outer layer adds waterproof insulation set (3)；
Or, the second is, after the heart yearn of sensing cable (1) welds with the terminal block terminal of TU Trunk Unit (2), waterproof insulation set (3) is added in the upper unification of all sensing cables (1) and TU Trunk Unit (2), process stranding together, and make to need the detection sensor exposed to expose at cable uplifting window.
8. line-type heat detector as claimed in claim 6, it is characterised in that:
When sensing cable (1) is connected by pluggable terminals with TU Trunk Unit (2); the integrated form of sensing unit is; TU Trunk Unit (2) adds shell in order to protect, and the detection sensor corresponding site windowing on shell exposing needs；Sensing cable (1) outer layer adds waterproof insulation set (3).
9. the line-type heat detector as described in claim 2,3,4 or 5, it is characterised in that:
Detection sensor in TU Trunk Unit (2) includes: the one or more combination in infrared temperature sensor, semiconductor temperature sensor, Smoke Sensor, harmful gas sensor, flame sensor.
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| CN111696302A (en) * | 2020-07-03 | 2020-09-22 | 青鸟消防股份有限公司 | Temperature sensing cable, temperature sensing fire detection system comprising same and temperature detection method |
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