CN101188037A - A linear temperature sensing detector with positive temperature coefficient and negative temperature coefficient feature - Google Patents
A linear temperature sensing detector with positive temperature coefficient and negative temperature coefficient feature Download PDFInfo
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- CN101188037A CN101188037A CNA2007101589668A CN200710158966A CN101188037A CN 101188037 A CN101188037 A CN 101188037A CN A2007101589668 A CNA2007101589668 A CN A2007101589668A CN 200710158966 A CN200710158966 A CN 200710158966A CN 101188037 A CN101188037 A CN 101188037A
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Abstract
The invention aims at providing a linear temperature-sensing detector that has positive temperature coefficient and negative temperature coefficient properties, realizes the analog-quantity temperature-fixing multi-level alarming function, and the short-circuit, the circuit-breaking and the power-failure alarming functions, and can be used repeatedly. The linear temperature-sensing detector that has the positive temperature coefficient and the negative temperature coefficient properties comprises a closed-circuit signal collection circuit that consists of a temperature-sensing cable with two ends respectively connected with a microcomputer modulator and a terminal resistor. The invention is characterized in the structure of the temperature-sensing cable that a material blocking layer having the positive temperature coefficient and the negative temperature coefficient properties is arranged between two metal conductors; the microcomputer modulator monitors the blocking layer of the positive temperature coefficient and the negative temperature coefficient properties of the temperature-sensing cable, and judges whether a multi-level alarming signal is outputted according to the designed value of the variation of the temperature and the resistance value.
Description
Technical field
The present invention relates to line-type heat detector, a kind of line-type heat detector with positive temperature coefficient (PTC) and negative temperature coefficient feature.
Background technology
A kind of analog linear temperature-sensing detector, the construction of cable is the plastic packets coating that two conductors all coat NTC characteristic (negative temperature coefficient feature) outward, twist then to after extrusion molding restrictive coating together, temperature rises when being heated, NTC plastics resistance between the conductor reduces, the degree relevant with temperature (being that resistance value is measurable analog quantity) that resistance reduces, analog linear constant temperature or rate-of-rise and fixed temperature detector are to measure the absolute value or the pace of change of resistance, see Figure 12.The shortcoming of this detector is: behind the alarm temperature that detector is heated and temperature arrival is certain, detector can be reported a fire in advance, alarm temperature uses length relevant with the length of being heated with detector, the length of being heated is long more, the alarm temperature value is low more, promptly can not right judgement fire and alarm temperature, make the accuracy of this detector alarm temperature lower.Advantage: can recover, the back detector temperature of reporting to the police arrives the fire alarm temperature, but does not surpass the temperature of being burnt fully, and temperature reduces the back detector and still can work on.
Summary of the invention
The purpose of this invention is to provide a kind of line-type heat detector, realize multistage warning function of analog quantity constant temperature and short circuit, open circuit, the disconnection fault warning function with positive temperature coefficient (PTC) and negative temperature coefficient feature, reusable.
A kind of line-type heat detector with positive temperature coefficient (PTC) and negative temperature coefficient feature, connect and compose the closed circuit signaling Acquisition Circuit with microcomputer modulator and terminal resistance respectively by the temperature sensing cable two ends, the structure that it is characterized in that temperature sensing cable: be provided with positive temperature coefficient (PTC) and negative temperature coefficient feature material barrier layer between two metallic conductors, microcomputer modulator is monitored the positive temperature coefficient (PTC) and the negative temperature coefficient feature material barrier layer of temperature sensing cable, and judges the multistage alerting signal of output according to temperature and change in resistance setting value.
Compared with the prior art the present invention has following advantage:
Because the present invention has adopted the barrier layer with positive temperature coefficient (PTC) and negative temperature coefficient feature on temperature sensing cable, when this barrier layer allows to use high ambient temperature following at temperature sensing cable, barrier layer shows as ptc characteristics, when the heating temperature of temperature sensing cable surpasses when allowing to use high ambient temperature, barrier layer changes negative temperature coefficient feature into by ptc characteristics, sees Figure 13.The present invention has overcome traditional analog amount linear temperature sensitive cable influences the defective of alarm temperature precision because of using length and environment temperature.
Description of drawings
Fig. 1 is a kind of traditional analog linear temperature-sensing panel detector structure synoptic diagram;
Fig. 2, Fig. 3, Fig. 4, be the structural representation of the present invention example 1-example 3;
Fig. 5 is the barrier layer temperature-sensitive effect curve figure that Conventional detectors has only the NTC characteristic;
Fig. 6 is the positive temperature coefficient (PTC) of a kind of line-type heat detector with positive temperature coefficient (PTC) and negative temperature coefficient feature of the present invention and the temperature-sensitive effect curve figure of negative temperature coefficient feature material barrier layer;
Embodiment
A kind of line-type heat detector with positive temperature coefficient (PTC) and negative temperature coefficient feature, example 1 is seen Fig. 2, being connected to form the closed circuit signaling Acquisition Circuit with microcomputer modulator 4 and terminal resistance R respectively by the temperature sensing cable two ends constitutes, the structure that it is characterized in that temperature sensing cable: two metallic conductor 1 parallel distances equate to be arranged on and a kind ofly have in positive temperature coefficient (PTC) and the negative temperature coefficient feature material barrier layer 2, when the temperature sensing cable resistance that has positive temperature coefficient (PTC) and negative temperature coefficient feature material barrier layer 2 between two metallic conductors 1 of being heated is positive temperature coefficient (PTC), when the temperature sensing cable heating temperature surpasses when allowing to use high ambient temperature, barrier layer 2 changes negative temperature coefficient feature into by ptc characteristics, when the resistance resistance is reduced to a range of set value, judge the multistage alerting signal of output by microcomputer modulator 4, and short circuit, open circuit, the output of disconnection fault alerting signal.When the temperature sensing cable temperature returns to when allowing to use high ambient temperature following, spacer material layer 2 resistances between two metallic conductors 1 raise, and temperature sensing cable returns to normal operating conditions again, so can reuse after reporting to the police.
Two metallic conductors 1 also can be multicores in the structure of the foregoing description 1～2 temperature sensing cable, with identical method setting.Outer extrusion molding external sheath layer of temperature sensing cable or braiding external sheath layer 3 can also coat one deck earlier in the coating external sheath layer 3 and cover plastic-aluminum or compound copper-plastics band or metal forming shielding material layer 5.
Below be the present invention used properties of materials and proportioning explanation:
1, the material specification of metallic conductor 1 is between Φ 0.2～3.0mm, can select the alloy material of steel wire, copper cash, iron wire, nickel wire, aluminum steel, platinum line, copper-clad aluminum conductor, ladle aluminum steel, stainless steel wire and above-mentioned material for use, wire external layer or zinc-plated, zinc-plated, copper facing, silver-plated, chromium plating, nickel plating.
2, the material of positive temperature coefficient (PTC) and negative temperature coefficient feature material barrier layer 2 can select for use butyl rubber, potassium base styrene-butadiene rubber and above-mentioned material by mixing conductive powder body or the semiconductor powder is made, and thickness is preferred between 0.01～3mm.
Positive temperature coefficient (PTC) and negative temperature coefficient feature tr pt A can be preferred between 40 ℃～100 ℃.
3, aluminium-plastic tape or compound copper-plastics band or metal forming clad 5 are versatile material.Width is at 5～25mm, and thickness is preferred between 0.01～1.0mm.
4, external sheath layer 3 materials can be selected Polyvinylchloride, tygon, fluoroplastic, Maranyl, polyamine fat plastics, polypropylene, polystyrene, haloflex, ethylene-vinyl acetate copolymer for use.Extrusion molding external sheath layer thickness is preferred between 0.1～2.0mm, and braiding external sheath layer plastic monofilament or metal filament diameter are preferred between 0.01～0.5mm.
Claims (6)
1. a kind of line-type heat detector according to claim 1 with positive temperature coefficient (PTC) and negative temperature coefficient feature, the structure that it is characterized in that temperature sensing cable: what it adopted is that two metallic conductors (1) coat a kind of have positive temperature coefficient (PTC) and negative temperature coefficient feature material barrier layer (2) respectively, parallel then or stranded or be intertwined, pitch stranded or that twine is preferred between 20mm～200mm.
2. line-type heat detector with temperature coefficient and negative temperature coefficient feature, be connected to form the closed circuit signaling Acquisition Circuit with microcomputer modulator (4) and terminal resistance R respectively by the temperature sensing cable two ends and constitute, it is characterized in that the structure of temperature sensing cable: what it adopted is to be provided with a kind of have positive temperature coefficient (PTC) and negative temperature coefficient feature material barrier layer (2) between two metallic conductors (1).
3. a kind of line-type heat detector with positive temperature coefficient (PTC) and negative temperature coefficient feature according to claim 1, it is characterized in that the structure of temperature sensing cable: two metallic conductors (1) also can be multicores, with identical method setting.
4. a kind of outer all right extrusion molding external sheath layer of line-type heat detector temperature sensing cable or braiding external sheath layer (3) according to claim 1 with positive temperature coefficient (PTC) and negative temperature coefficient feature.Coat in the external sheath layer (3) and can also cover plastic-aluminum or compound copper-plastics band or metal forming shielding material layer (5) by elder generation's coating one deck.
5. a kind of line-type heat detector according to claim 1 with positive temperature coefficient (PTC) and negative temperature coefficient feature, the structure that it is characterized in that temperature sensing cable: what it adopted is that a metallic conductor 1 coats positive temperature coefficient (PTC) and negative temperature coefficient feature material barrier layer (2), coat one deck again and cover plastic-aluminum or the compound copper-plastics band or the metal foil bed of material (5), the outer one deck external sheath layer (3) that coats again of layer.
6. a kind of line-type heat detector with positive temperature coefficient (PTC) and negative temperature coefficient feature according to claim 1 is characterized in that positive temperature coefficient (PTC) and negative temperature coefficient feature tr pt A can be preferred between 40 ℃～100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101589668A CN101188037A (en) | 2007-12-18 | 2007-12-18 | A linear temperature sensing detector with positive temperature coefficient and negative temperature coefficient feature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101589668A CN101188037A (en) | 2007-12-18 | 2007-12-18 | A linear temperature sensing detector with positive temperature coefficient and negative temperature coefficient feature |
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| CN101188037A true CN101188037A (en) | 2008-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007101589668A Pending CN101188037A (en) | 2007-12-18 | 2007-12-18 | A linear temperature sensing detector with positive temperature coefficient and negative temperature coefficient feature |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101996466A (en) * | 2010-11-11 | 2011-03-30 | 李萍 | Line-type temperature sensor |
| CN107328485A (en) * | 2017-07-06 | 2017-11-07 | 厦门安斯通微电子技术有限公司 | A kind of optional TEMP chip of single-chip integration Positive and Negative Coefficient Temperature |
| CN107978121A (en) * | 2017-12-29 | 2018-05-01 | 江苏中实电子有限公司 | A kind of reusable line-type heat detector and its alarm method |
-
2007
- 2007-12-18 CN CNA2007101589668A patent/CN101188037A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101996466A (en) * | 2010-11-11 | 2011-03-30 | 李萍 | Line-type temperature sensor |
| CN107328485A (en) * | 2017-07-06 | 2017-11-07 | 厦门安斯通微电子技术有限公司 | A kind of optional TEMP chip of single-chip integration Positive and Negative Coefficient Temperature |
| CN107978121A (en) * | 2017-12-29 | 2018-05-01 | 江苏中实电子有限公司 | A kind of reusable line-type heat detector and its alarm method |
| CN107978121B (en) * | 2017-12-29 | 2024-02-09 | 江苏中实电子有限公司 | Reusable linear temperature-sensing fire detector and alarm method thereof |
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