Technical background
Analog linear temperature-sensing detector of the prior art, it is a kind of broad-spectrum fire detector, accompanying drawing 1 is a Chinese patent application number: 200510104904.X, disclose a kind of double-criterion simulation quantity linear temperature-sensitive five fire and visited cable, form by two kinds of detecting conductors, NTC characteristic barrier layer, sensitive characteristic barrier layer, between the described a pair of parallel detecting conductor NTC characteristic barrier layer is set, constitutes and survey cable A '; Described another between the parallel detecting conductor sensitive characteristic barrier layer being set, constitute and survey cable B '; Described detection cable A ' and described detection cable B ' are combined with each other; The temperature coefficient of described NTC characteristic barrier layer is α
TA, the temperature coefficient of described sensitive characteristic barrier layer are α
TB, α
TA is not equal to α
TB, described sensitive characteristic barrier layer are a kind of in NTC characteristic barrier layer, ptc characteristics barrier layer, the CTR characteristic barrier layer.The electrical signal detection device detects the variation of two kinds of different temperature coefficients barrier layers, after analytical calculation is confirmed, and output alarm signal;
Accompanying drawing 2 is a China Patent No.: 200510114819.1, and a kind of fire detector and method thereof that prolongs maximal use length uses a temperature sensing element A as an alerting signal generator; Use a temperature sensing element B as another alerting signal generator; Make the electric signal measurement device detect the variable quantity P in the time period of setting in a certain moment in real time
AAnd variable quantity Pb; The variable quantity P of design temperature induction element A
AWith the function of the variable quantity Pb of temperature sensing element B, f (P
a, P
b), with f (P
a, P
b) with the corresponding data input electrical signal measurement mechanism that changes Pb; With a constant d input electrical signal measurement mechanism; The variable quantity P that makes the electric signal measurement device obtain according to actual detected
a, variable quantity P
bAnd with formerly the input described f (P
a, P
b) data operation produce a f (P
a, P
b) fixed number value really, and this numerical value and described constant d compared, according to comparative result, send the differential temperature alerting signal by the electric signal measurement device.And Chinese patent application number: 200510134667.1, the alarm method of a kind of composite line type temperature sensing fire detector and data fusion thereof, by a linear temperature sensor A, linear temperature sensor B, an electric signal measurement device constitute; Described linear temperature sensor A, linear temperature sensor B are set together; Described linear temperature sensor A, linear temperature sensor B respectively have at least one and survey body and two electrical quantity signal output terminals, and described electrical quantity signal output terminal is electrically connected with the electric signal measurement device respectively; Described linear temperature sensor A, linear temperature sensor B output to the electrical quantity signal inequivalence of electric signal measurement device., and can reduce the rate of false alarm of detector effectively.The 3rd, the third formation: adopt at least one linear temperature sensor at a time to detect and produce the electrical parameter values of at least two kinds of inequivalences, these two electrical parameter values are transferred to the electric signal measurement device, and by installing a functional value of trying to achieve this moment according to the predetermined function that comprises described two electrical quantitys, again the value and a predetermined value of being tried to achieve compared, determine fire.This detector all will be subjected to the influence of environment temperature, its setting value of different environment temperatures all need change, the length of being heated simultaneously also can influence the judgement of its acquired signal, the telltale of every kind of detector all needs to gather two or more different parameter value, function algorithm by complexity judges that complicated algorithm causes wrong report easily and fails to report.Therefore, need a kind of judgement relation simple, not influenced by ambient temperature, the detector of the effect length of not being heated.
Accompanying drawing 3 is a Chinese patent application number: 200510137648.4, and line type fire detector data fusing alarm system and method.Adopt at least one linear temperature sensor 21 or 22 at a time to detect and produce the first kind of electrical quantity of at least two kinds of inequivalences and the numerical value of second kind of electrical quantity; The numerical value of detected two kinds of inequivalence electrical quantitys of this moment is transferred in the electric signal measurement device 23, and by data fusion device 24 by computing unit 26 according to a predetermined function that comprises described first kind of electrical quantity and second kind of electrical quantity at least, try to achieve a functional value in this moment, again the functional value and a predetermined value of being tried to achieve compared 25; Judge that according to comparative result whether will get angry calamity reports to the police, if report to the police, then starts fire alarm installation 20.Further technical scheme can also adopt two linear temperature sensors 21 and 22, detects and produce first kind of electrical quantity and second kind of electrical quantity of two kinds of inequivalences respectively.Can also one after the other detect the electrical quantity of latter two different two kinds of inequivalences constantly earlier.
Summary of the invention
The purpose of this invention is to provide a kind of recoverable cable type linear temperature-sensing detector, the influence of environment temperature is reduced to zero, the influence of the length of being heated also is zero, two groups of electrical quantitys of normal operating conditions are relative equivalent electrical parameters, when the difference of two groups of electrical quantitys during greater than a setting value, send the differential temperature alerting signal, and realize reusable.
A kind of recoverable cable type linear temperature-sensing detector, form by microcomputer modulator and temperature sensing cable and terminal handler, the structure that it is characterized in that temperature sensing cable in the detector mainly is to be made of a linear temperature sensor C and a linear temperature sensor D, described linear temperature sensor C, linear temperature sensor D can produce two detected equivalent electrical parameter signals, and described electrical quantity signal can be voltage, resistance, electric current, electric capacity etc.Be provided with identical NTC or CTR or ptc characteristics material barrier layer between two metallic conductors of described linear temperature sensor C, linear temperature sensor D, wherein a linear temperature sensor coats one deck outer jacket or insulation material layer again.After coating outer jacket or insulation material layer, linear temperature sensor C or stranded put together parallel with linear temperature sensor D.During less than 10 ℃/min, microcomputer modulator detects the absolute value of two electrical quantity value differences of linear temperature sensor C and linear temperature sensor D in real time at the heating rate of environment temperature, is normal condition during less than predetermined alarming value.When heating rate met or exceeded 10 ℃/min, the absolute value of detected two the electrical quantity value differences of microcomputer modulator was more than or equal to predetermined value, and then output alarm signal is realized the differential temperature warning.
A kind of recoverable cable type linear temperature-sensing detector of the present invention compared with prior art has following advantage:
1, be not subjected to the influence of environment temperature fully, during any environment temperature, detector electrical quantity value difference absolute
2, irrelevant with the length of being heated, because the value of same a kind of electrical quantity that linear temperature sensor C and linear temperature sensor D produce, temperature sensing element C and linear temperature sensor D export approximately uniform electrical quantity signal, so reliability is higher under the identical length of being heated.
3, only consider a kind of variation and collection of electrical quantity, by simply relatively realizing, need not to consider variation, the collection of two kinds of inequivalence parameters, saved the judgment processing of complicated function algorithm, thereby reduce because of wrong report that complicated deterministic process produces, fail to report, further improved the accuracy and the reliability of reporting to the police again.
Differential temperature warning heating rate: 10 ℃/min (response in 20s~140s), 20 ℃/min (response in 22.5s~90s), 30 ℃/min (response in 15s~60s), be suitable for wider temperature range, be particularly useful for fire temperature rise ratio place faster.The product quality reliability height, cost is low, and temperature-sensitive warning sensitivity height can satisfy the performance requirement of GB16280-2005 " line-type heat detector " and supplementary provision.
Embodiment
A kind of recoverable cable type linear temperature-sensing detector, example 1 is seen Fig. 4, form by microcomputer modulator 5 and temperature sensing cable and terminal handler 6, the structure that it is characterized in that temperature sensing cable: be to constitute by linear temperature sensor C and linear temperature sensor D, described linear temperature sensor C and linear temperature sensor D all be by two identical metals lead between 1 be parallel to each other, spacing equates to be arranged at identical NTC or CTR or ptc characteristics material 2 in, linear temperature sensor C also coats one deck outer jacket or insulation material layer 3 then.After coating outer jacket or insulation material layer, linear temperature sensor C or stranded put together parallel with linear temperature sensor D.
Embodiment 2, a kind of recoverable cable type linear temperature-sensing detector, see Fig. 5, it is characterized in that the structure of temperature sensing cable is to be made of linear temperature sensor C and linear temperature sensor D in the detector, two metals of described linear temperature sensor C and linear temperature sensor D are led 1 and are coated identical NTC or CTR or ptc characteristics material 2 respectively, twist respectively then to or parallel placement, wherein linear temperature sensor C coats one deck outer jacket or insulation material layer 3 again.Wherein one coat outer jacket or insulation material layer 3 after, linear temperature sensor C or stranded put together parallel with linear temperature sensor D.
Embodiment 3, a kind of recoverable cable type linear temperature-sensing detector, see Fig. 6, the structure that it is characterized in that temperature sensing cable is: linear temperature sensor C is identical NTC or CTR or the ptc characteristics macromolecule polymer material layer 2 of a metallic conductor 1 outer coating with linear temperature sensor D, then along putting or twine one or one with upper conductor 8, coat plastic-aluminum or copper again and mould compound band or metal foil layer 7, the outer jacket or the insulation material layer 3 that coat different-thickness are at last respectively formed.Linear temperature sensor C or stranded put together parallel with linear temperature sensor D.
The structure of above-mentioned example 3 temperature sensing cables can also be: linear temperature sensor C is identical NTC or CTR or the ptc characteristics macromolecule polymer material layer 2 of a metallic conductor 1 outer coating with linear temperature sensor D, coat plastic-aluminum or copper then and mould compound band or metal foil layer 7, again along putting or twine one or one with upper conductor 8, the outer jacket or the insulation material layer 3 that coat different-thickness are at last respectively formed linear temperature sensor C or stranded put together parallel with linear temperature sensor D.
Temperature sensing cable in above-mentioned example 1~example 3 can produce detected, and two voltages, resistance, electric capacity are the electrical quantity signal.
Embodiment 4, a kind of recoverable cable type linear temperature-sensing detector, see Fig. 7, form by microcomputer modulator 5 and temperature sensing cable and terminal handler 6, the structure that it is characterized in that temperature sensing cable: be to constitute by linear temperature sensor C and linear temperature sensor D, described linear temperature sensor C and linear temperature sensor D are parallel to each other between leading 1 by two metals inequality, spacing equates to be arranged in identical NTC or the CTR characteristic material 2, after wherein single line type temperature sensing element C coats one deck outer jacket or insulation material layer 3 then, linear temperature sensor C or stranded put together parallel with linear temperature sensor D.Based on the thermoelectrical potential principle that thermoelectric effect produces, it is voltage that described linear temperature sensor C, linear temperature sensor D can produce detected thermoelectrical potential.
Its mode of connection: the positive pole of the end of the linear temperature sensor C of temperature sensing cable is linked to each other with the same end negative pole of linear temperature sensor D, link to each other with the positive pole of induction element D with the negative pole of end induction element C; The positive and negative electrode of other end induction element D links to each other with a resistance R, and induction element C positive and negative electrode is connected respectively on the test side of microcomputer modulator 5.
When linear temperature sensor C, D were in the temperature that does not have variation, C, D produced identical thermoelectrical potential, and link to each other because of C, D both positive and negative polarity this moment, and the thermoelectrical potential of generation is cancelled out each other, and the test side voltage of microcomputer modulator 5 is zero or is similar to zero; When the environment temperature heating rate meets or exceeds 10 ℃/min, because induction element C has outer jacket or insulation material layer 3, so the heat-conduction coefficient of induction element C is less than induction element D, then induction element C thermoelectrical potential is less than induction element D thermoelectrical potential, and it is non-vanishing or be not approximately zero that this moment, the test side detected voltage.When alarming value that the detected magnitude of voltage in test side is set in more than or equal to microcomputer modulator 5, microcomputer modulator 5 sends alerting signal.
Company's mode two of embodiment 4 is seen Fig. 9, and the metallic conductor 1 of induction element C, D one end connects terminal handler 6 corresponding terminal resistance R two ends respectively; The positive pole of other end induction element C is connected with the negative pole of induction element D, and the negative pole of induction element C is connected with the positive pole of induction element D, and then connects respectively on the test side of microcomputer modulator 5.
Embodiment 5, a kind of recoverable cable type linear temperature-sensing detector, see Fig. 8, the structure that it is characterized in that temperature sensing cable is: be to be made of linear temperature sensor C and linear temperature sensor D, described linear temperature sensor C is identical NTC or the CTR characteristic macromolecule polymer material layer 2 of a metallic conductor 1 outer coating with linear temperature sensor D, then along putting or twine one or one with upper conductor 8, coat plastic-aluminum or copper again and mould compound band or metal foil layer 7, the outer jacket or the insulation material layer 3 that coat different-thickness are at last respectively formed.Linear temperature sensor C or stranded put together parallel with linear temperature sensor D.
The structure of above-mentioned example 5 temperature sensing cables can also be: linear temperature sensor C is identical NTC or the CTR characteristic macromolecule polymer material layer 2 of a metallic conductor 1 outer coating with linear temperature sensor D, coat plastic-aluminum or copper then and mould compound band or metal foil layer 7, along putting or twine one or one with upper conductor 8, the outer jacket or the insulation material layer 3 that coat different-thickness are at last respectively formed again.Linear temperature sensor C or stranded put together parallel with linear temperature sensor D.
It connects mode: the conductor 8 of induction element C one end is linked to each other with holding the metallic conductor 1 of induction element D together, link to each other with the conductor 8 of induction element D with the metallic conductor 1 of holding induction element C; The metallic conductor 1 of other end induction element C and conductor 8 are connected to the test side of microcomputer modulator 5, and the metallic conductor 1 of induction element D and conductor 8 link to each other with resistance R, and its principle of work is identical with embodiment 4.
Company's mode two of embodiment 5: see Figure 10, induction element C, D one end metallic conductor 1 and connect terminal handler 6 corresponding terminal resistance R two ends respectively along putting conductor 8; The metallic conductor 1 of other end induction element C links to each other with the conductor 8 of induction element D, and the metallic conductor 1 of other end induction element D and the conductor 8 of induction element C join, and are connected respectively on the test side of microcomputer modulator 5 again.
Company's mode three of embodiment 4,5 can also be, sees Figure 11, Figure 12, and the metallic conductor 1 of induction element C, D one end or metallic conductor 1 and conductor 8 meet the terminal resistance R of terminal handler 6 respectively; The other end, C, D connect respectively on the detection terminal of microcomputer modulator 5.It is magnitude of voltage that linear temperature sensor C, linear temperature sensor D can produce two detected identical equivalent thermoelectrical potential values, the alarming value of setting in the absolute value of these two value differences and the microcomputer modulator 5 relatively sends alerting signal during more than or equal to this alarming value.
Embodiment 6, a kind of recoverable cable type linear temperature-sensing detector, see Figure 13, form by microcomputer modulator 5 and temperature sensing cable, the structure that it is characterized in that temperature sensing cable, constitute by linear temperature sensor C and linear temperature sensor D, described linear temperature sensor C and linear temperature sensor D be respectively by be parallel to each other between two identical thermal resistance tinsels 1 ', spacing equates to be arranged in the insulation material layer 9, wherein single line type temperature sensing element C coats one deck outer jacket or insulation material layer 3 then.Two linear temperature sensor C or stranded put together parallel that different clads are arranged with linear temperature sensor D.Two thermal resistance tinsels 1 ' of linear temperature sensor C, linear temperature sensor D one end are linked together separately, and the thermal resistance tinsel 1 ' of the other end links to each other with the test side of microcomputer modulator 5 respectively.Linear temperature sensor C, linear temperature sensor D can produce two detected identical effective thermal resistances.
The linear temperature sensor C of above-mentioned example 6 and the thermal resistance tinsel 1 ' of linear temperature sensor D can be more than two, the head and the tail serial connection; Thermal resistance tinsel 1 ' can also be a helical structure.
Embodiment 7, a kind of recoverable cable type linear temperature-sensing detector, see Figure 14, form by microcomputer modulator 5 and temperature sensing cable, the structure that it is characterized in that temperature sensing cable, be by linear temperature sensor C, linear temperature sensor D and linear temperature sensor F constitute, linear temperature sensor C, linear temperature sensor D and linear temperature sensor F are three thermal resistance tinsels 1 ' coated insulation material layers 9 respectively, and then of coating one deck outer jacket or insulation material layer 3 is linear temperature sensor C, one of no outer jacket or insulation material layer 3 as linear temperature sensor D, and another root does not have outer jacket or insulation material layer 3 linear temperature sensor F as public pole.Linear temperature sensor C, linear temperature sensor D and linear temperature sensor F can parallel or stranded putting together.Three thermal resistance tinsels 1 ' of linear temperature sensor C, linear temperature sensor D and linear temperature sensor F one end are connected together, and three hot wires 1 ' of the other end are connected respectively on the test side of microcomputer modulator 5.
The structure of above-mentioned example 7 can also be: linear temperature sensor C and linear temperature sensor F outside coat one deck outer jacket at the same time or separately again or insulation material layer 3 constitutes.
Can to produce the thermal resistance of the metal material of two detected same equivalent when environment temperature be the electrical quantity signal for linear temperature sensor C, linear temperature sensor D in above-mentioned example 6~example 7.The alarming value of setting in the absolute value of these two thermal resistance value differences and the microcomputer modulator 5 relatively sends alerting signal during more than or equal to this alarming value.
The structure of the cable in above-mentioned example 1~example 7 can also be: the outermost layer of temperature sensing cable also can coat external sheath layer or braiding external sheath layer 10 again.
Material and behavioral illustrations that conductor of the present invention and conductor clad are adopted:
1, metallic conductor 1: specification is selected for use between Φ 0.2~3.0mm.
Material can be selected steel wire, copper cash, iron wire, stainless steel wire and all tinsels for use.
2, NTC or CTR or ptc characteristics macromolecule polymer material layer:
Select the performance of material to be; Vicat softening point is 40 ℃~180 ℃ the melting NTC or all plastics, the elastomeric material of CTR or ptc characteristics.
3, insulation material layer: material can be the low macromolecule polymer material of any heat-conduction coefficient.
4, external sheath layer: material can be high molecular polymer insulating material or PTC, NTC, CTR characteristic macromolecule polymer material, also can be the semiconductor macromolecule polymer material.The thickness of extrusion molding restrictive coating is selected between 0.1~5.0mm.
5, plastic-aluminum or compound copper-plastics band: the thickness of aluminium-plastic tape or compound copper-plastics band or metal forming can be selected for use between 0.01~1.0mm.Plastic-aluminum or compound copper-plastics band or metal forming width are preferred between 5mm-20mm.The cross section structure of plastic-aluminum/compound copper-plastics band is: upper and lower layer is a metal level, and the centre is a plastic layer.
6, twine or along putting conductor: can be copper conductor, copper cladding aluminum conductor, iron wire, steel wire, nickel wire, platinum line, stainless steel wire.The conductor skin can be zinc-plated, zinc-plated, copper facing, silver-plated, chromium plating, nickel plating.The line footpath is selected for use between 0.01~3.0mm.
7, insulation material layer: Vicat softening point is 40 ℃~180 ℃, and specific insulation is 10
10~10
18All plastics, elastomeric material or the insullac of Ω cm.