CN100495455C - Recoverable cable type linear temperature difference-sensing detector - Google Patents

Recoverable cable type linear temperature difference-sensing detector Download PDF

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CN100495455C
CN100495455C CNB2007100123995A CN200710012399A CN100495455C CN 100495455 C CN100495455 C CN 100495455C CN B2007100123995 A CNB2007100123995 A CN B2007100123995A CN 200710012399 A CN200710012399 A CN 200710012399A CN 100495455 C CN100495455 C CN 100495455C
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temperature sensor
linear temperature
linear
conductor
material layer
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CN101105885A (en
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张陈
王文江
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Shenyang Putaian Technology Co.,Ltd.
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张陈
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Abstract

A restorable cable-type temperature difference and sensing detector consists of a microcomputer modulator and a temperature sensing cable, and a terminal processor. The detector is characterized in that the temperature sensing cable in the detector is composed of a line-type temperature sensing component C and a line-type temperature sensing component D, which can generate two same equivalent electric parameter signals. The electric parameter signals can be voltage, resistance, capacitance, etc. When the temperature rising speed reaches or exceeds 10 Celsius system/min, the electric parameter values of the line-type temperature sensing component C and D have unequal changes, since the temperature sensing component C or D with external protection layer or heat insulation layer has the different heat transmission coefficient with the sensing component C or D without external protection layer or heat insulation layer. If the absolute difference between the two electric parameters collected by the microcomputer modulator is above or equal to the preset value, the detector will send alarm signals to realize alarm of temperature difference.

Description

A kind of recoverable cable type linear temperature-sensing detector
Technical field
The present invention relates to fire alarm installation, a kind of recoverable cable type linear temperature-sensing detector.
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.
Description of drawings
Fig. 1～Fig. 3 is existing three kinds of line-type heat detector structural representations;
Fig. 4～Fig. 6 is that heat detector of the present invention is the structural representation of three embodiment of the example 1～example 3 of electrical quantity signal with voltage, resistance, electric capacity;
Fig. 7～Figure 12 is that the present invention is the example 4 of electrical quantity signal, three kinds of wiring schematic diagrams of 5 two kinds of structures of example with the thermoelectrical potential that thermoelectric effect produces;
Figure 13～Figure 14 is the present invention with the metal material thermal resistance is the two kinds of structures and the wiring schematic diagram of example 6, the example 7 of electrical quantity signal;
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.

Claims (11)

1, a kind of renewable type cable linear differential temperature heat detector, form by microcomputer modulator (5) and temperature sensing cable and terminal handler (6), the structure that it is characterized in that temperature sensing cable is to be made of linear temperature sensor C and linear temperature sensor D, described linear temperature sensor C and linear temperature sensor D, wherein single line type temperature sensing element coats one deck outer jacket or insulation material layer (3), linear temperature sensor C or stranded put together parallel with linear temperature sensor D, described linear temperature sensor C and linear temperature sensor D produce two equivalent electrical parameters, microcomputer modulator (5) detects the absolute value of two electrical quantity value differences of linear temperature sensor C and linear temperature sensor D in real time, absolute value is then exported the differential temperature alerting signal more than or equal to predetermined value; The electrical quantity signal is voltage, resistance, electric capacity, electric current;
When the heating rate of environment temperature during less than 10 ℃/min, microcomputer modulator (5) detects the absolute value of two electrical quantity value differences of linear temperature sensor C and linear temperature sensor D in real time, is normal condition during less than predetermined value; When the heating rate of environment temperature during more than or equal to 10 ℃/min, the absolute value of detected two the electrical quantity value differences of microcomputer modulator (5) is more than or equal to predetermined value, and output alarm signal then realizes that differential temperature reports to the police.
2, renewable type cable linear differential temperature heat detector according to claim 1 is characterized in that the structure of temperature sensing cable: described linear temperature sensor C and linear temperature sensor D by be parallel to each other between two metallic conductors (1), spacing equates to be arranged at identical NTC or CTR or ptc characteristics material layer (2) in; Coat respectively twist respectively behind identical NTC or CTR or the ptc characteristics material layer (2) to or parallel placement constitute, wherein linear temperature sensor C also is coated with one deck outer jacket or insulation material layer (3) then; Linear temperature sensor C or stranded put together parallel with linear temperature sensor D.
3, renewable type cable linear differential temperature heat detector according to claim 1, the structure that it is characterized in that temperature sensing cable is: be made of linear temperature sensor C and linear temperature sensor D, linear temperature sensor C is identical NTC or CTR or the ptc characteristics macromolecule polymer material layer (2) of the outer coating of a metallic conductor (1) 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), coat the outer jacket or the insulation material layer (3) of different-thickness at last respectively; Perhaps linear temperature sensor C is identical NTC or CTR or the ptc characteristics macromolecule polymer material layer (2) of the outer coating of a metallic conductor (1) 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, coat the outer jacket or the insulation material layer (3) of different-thickness at last respectively again with upper conductor (8); Linear temperature sensor C or stranded put together parallel with linear temperature sensor D.
4, renewable type cable linear differential temperature heat detector according to claim 1, the structure that it is characterized in that temperature sensing cable is: be made of linear temperature sensor C and linear temperature sensor D, described linear temperature sensor C and linear temperature sensor D be by be parallel to each other between two identical metallic conductors (1), spacing equates to be arranged at identical NTC or CTR or ptc characteristics material (2) in, wherein single line type temperature sensing element coats one deck outer jacket or insulation material layer (3) then; 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.
5, renewable type cable linear differential temperature heat detector according to claim 1 is made up of microcomputer modulator (5) and temperature sensing cable and terminal handler (6), and the thermoelectrical potential principle based on thermoelectric effect produces is characterized in that the structure of temperature sensing cable is:
(1): constitute by linear temperature sensor C and linear temperature sensor D, described linear temperature sensor C and linear temperature sensor D be by be parallel to each other between two metallic conductors inequality (1), spacing equates to be arranged at identical NTC or CTR characteristic material (2) in, after wherein single line type temperature sensing element 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; It is magnitude of voltage that described linear temperature sensor C, linear temperature sensor D produce one or two detected thermoelectrical potential, and the absolute value of magnitude of voltage or its difference is a normal condition during less than predetermined value; The absolute value of magnitude of voltage or its difference is then exported the differential temperature alerting signal more than or equal to predetermined value;
Mode of connection a: 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, and the negative pole of same end induction element C links to each other with the positive pole of induction element D; 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 environment temperature that does not have variation, C, D produced identical voltage, and link to each other because of C, D both positive and negative polarity this moment, and the voltage of generation is cancelled out each other, and the magnitude of voltage that microcomputer modulator (5) detects is zero or is similar to zero; When the heating rate of environment temperature during less than 10 ℃/min, microcomputer modulator (5) detects the magnitude of voltage of the generation of linear temperature sensor C and linear temperature sensor D in real time, is normal condition during less than predetermined value; When the heating rate of environment temperature during more than or equal to 10 ℃/min, microcomputer modulator (5) detects the magnitude of voltage of the generation of linear temperature sensor C and linear temperature sensor D in real time, when magnitude of voltage during more than or equal to predetermined value microcomputer modulator (5) send the differential temperature alerting signal;
Mode of connection b: the metallic conductor (1) of the end of induction element C, D 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, connects respectively on the test side of microcomputer modulator (5) again;
(2): the structure of temperature sensing cable is: linear temperature sensor C is identical NTC or the CTR characteristic macromolecule polymer material layer (2) of the outer coating of a metallic conductor (1) 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; Perhaps linear temperature sensor C is identical NTC or the CTR characteristic macromolecule polymer material layer (2) of the outer coating of a metallic conductor (1) with linear temperature sensor D, coat plastic-aluminum or copper 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 then; Linear temperature sensor C or stranded put together parallel with linear temperature sensor D;
Mode of connection a: the conductor (8) of induction element C one end is linked to each other with the metallic conductor (1) of same end D, and the metallic conductor (1) of same end induction element C links to each other with the conductor (8) of D; 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 of induction element D (1) links to each other with resistance R with conductor (8);
Mode of connection b: the metallic conductor (1) of induction element C, D one end and conductor (8) connect terminal handler (6) corresponding terminal resistance R two ends respectively; The metallic conductor (1) of other end induction element C and the conductor (8) of induction element D link to each other, 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;
(1) with the mode of connection c of (2): 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).
6, renewable type cable linear differential temperature heat detector according to claim 1, form by microcomputer modulator (5) and temperature sensing cable, thermal resistance principle based on metal material, the structure that it is characterized in that temperature sensing cable is to be made of linear temperature sensor C and linear temperature sensor D, described linear temperature sensor C and linear temperature sensor D are respectively by being parallel to each other between two identical thermal resistance tinsels (1 '), spacing equates to be arranged in the insulating material (9) or coats identical insulating material (9) respectively, and wherein single line type temperature sensing element is coated with 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;
Its mode of connection: two thermal resistance tinsels (1 ') of linear temperature sensor C, linear temperature sensor D one end are connected separately, the thermal resistance tinsel (1 ') of the other end links to each other with the test side of microcomputer modulator (5) respectively, when linear temperature sensor C, linear temperature sensor D are in the environment temperature that does not have variation, produce two detected identical effective thermal resistance values; When the heating rate of environment temperature during less than 10 ℃/min, microcomputer modulator (5) detects the absolute value of two thermal resistance value differences that linear temperature sensor C and linear temperature sensor D produce in real time, and absolute value is a normal condition during less than predetermined value; When the heating rate of environment temperature during more than or equal to 10 ℃/min, the absolute value of two thermal resistance value differences of generation that microcomputer modulator (5) detects linear temperature sensor C and linear temperature sensor D in real time is during greater than predetermined value, and microcomputer modulator (5) sends the differential temperature alerting signal.
7, renewable type cable linear differential temperature heat detector according to claim 6, it is characterized in that the structure of temperature sensing cable: linear temperature sensor C and linear temperature sensor D thermal resistance tinsel (1 ') they are more than two, the head and the tail serial connection; Thermal resistance tinsel (1 ') is a helical structure.
8, renewable type cable linear differential temperature heat detector according to claim 1, the structure that it is characterized in that temperature sensing cable is: 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, other two no outer jackets or insulation material layer (3) be linear temperature sensor D and linear temperature sensor F, wherein linear temperature sensor F is as public pole; Linear temperature sensor C, linear temperature sensor D or stranded put together parallel with linear temperature sensor F; 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 of the other end (1 ') are connected respectively on the test side of microcomputer modulator (5).
9, renewable type cable linear differential temperature heat detector according to claim 8 is characterized in that: linear temperature sensor C and linear temperature sensor F outside coat one deck outer jacket or insulation material layer (3) at the same time or separately again and constitute.
10,, it is characterized in that the outermost layer of temperature sensing cable coats external sheath layer or braiding external sheath layer (10) again according to the described renewable type cable linear of claim 1 differential temperature heat detector.
11, renewable type line style cable formula differential temperature heat detector according to claim 1 is characterized in that the temperature sensing cable material therefor:
(1) metallic conductor: specification is selected for use between Φ 0.2～3.0mm;
Material is 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) outer jacket or insulation material layer: material is the low macromolecule polymer material of any heat-conduction coefficient;
(4) external sheath layer: material is high molecular polymer insulating material or PTC, NTC, CTR characteristic macromolecule polymer material, or 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 is selected for use between 0.01～1.0mm; Plastic-aluminum or compound copper-plastics band width are 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: be copper conductor, copper cladding aluminum conductor, iron wire, steel wire, nickel wire, platinum line, stainless steel wire; The conductor skin is 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.
CNB2007100123995A 2007-08-07 2007-08-07 Recoverable cable type linear temperature difference-sensing detector Active CN100495455C (en)

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CN101776490A (en) * 2010-03-12 2010-07-14 蒋陆肆 Method for real-timely monitoring cable working temperature
CN104200617A (en) * 2014-08-26 2014-12-10 安徽蓝德仪表有限公司 Recoverable type linear temperature-sensing detecting instrument
CN104198076A (en) * 2014-08-26 2014-12-10 安徽蓝德仪表有限公司 Multifunctional linear temperature sensor
CN104198075A (en) * 2014-08-26 2014-12-10 安徽蓝德仪表有限公司 Recoverable type linear temperature detecting system
CN113380010A (en) * 2021-06-16 2021-09-10 国家电网有限公司 High-temperature early warning system of power equipment
CN113470331B (en) * 2021-07-08 2023-05-02 哲弗智能系统（上海）有限公司 Differential temperature detection method and device of temperature sensing detector, temperature sensing detector and medium

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