CN102163359A - Linear temperature sensor with spare loop - Google Patents
Linear temperature sensor with spare loop Download PDFInfo
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- CN102163359A CN102163359A CN2011100901822A CN201110090182A CN102163359A CN 102163359 A CN102163359 A CN 102163359A CN 2011100901822 A CN2011100901822 A CN 2011100901822A CN 201110090182 A CN201110090182 A CN 201110090182A CN 102163359 A CN102163359 A CN 102163359A
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Abstract
The invention provides a linear temperature sensor with a spare loop, and the linear temperature sensor provided by the invention is mainly composed of a temperature-sensing cable both ends of which are respectively connected with a microcomputer modulator. The temperature-sensing cable is formed by arranging a negative temperature coefficient thermal-sensitive material layer between and around two metal detecting conductors, and then arranging a metal shielding layer on the negative temperature coefficient thermal-sensitive material layer. When the detecting conductors in the linear temperature sensor with the spare loop are in short circuit, the microcomputer modulator can normally monitor the temperature-sensing fire detection alarm of the temperature-sensing cable after emitting a short-circuit fault alarm signal; and the linear temperature sensor provided by the invention has the advantages that the microcomputer modulator can start and take over the metal shielding layer of the temperature-sensing cable as a spare detecting loop to continue the temperature-sensing fire detection while emitting the short-circuit fault alarm signal between the detecting conductors when the short-circuit is generated between two metal detecting conductors, therefore, a function of continuing the temperature-sensing fire detection after the short-circuit fault is added, and the higher safety and reliability are provided.
Description
Technical field
The present invention relates to a kind of cable linear temperature sensing warning device, can continue to monitor the recovered cable linear different constant temperature fire detector of fire alarm after the short circuit of a kind of line type temperature perceptron.
Technical background
Cable linear temperature sensing warning device of the prior art is a kind of application heat fire detector very widely.The cable linear temperature sensing warning device comprises microcomputer modulator, temperature sensing cable, terminal resistance composition.Temperature sensing cable is by being provided with negative temperature coefficient thermistor composition layer 30 between two metal detection conductors 10,20, being provided with two metal detection conductors, 10,20 stranded being set together of negative temperature coefficient thermistor composition layer 30, then extrusion molding external sheath layer 40 together.Microcomputer modulator 50 detects the change in electric between two metal detection conductors in real time, when temperature sensing cable is heated, because negative temperature coefficient thermistor composition layer 30 resistance descend, resistance between two metal detection conductors 10,20 reduces, when change in electric less than one fixedly during threshold values, microcomputer modulator 50 sends the constant temperature alerting signal.Be subjected to the mechanical external force short circuit between two metal detection conductors 10,20, when microcomputer modulator 50 detected two resistances between the metal detection conductor less than terminal resistance, microcomputer modulator 50 sent detecting conductor short-circuit alarming signal.Because two detecting conductors the 10, the 20th, metal, has certain degree of hardness, the two metal detection conductors 10,20 that are provided with negative temperature coefficient thermistor composition layer 30 are often processed together with stranded form, in application process, very easily be short-circuited, if breaking out of fire when short circuit, the cable linear temperature sensing warning device can't send fire alarm signal.
Summary of the invention
In order to address the above problem, the invention provides a kind of line type temperature perceptron with back-up circuit.The detecting conductor short circuit is taking place in a kind of line type temperature perceptron with back-up circuit, and microcomputer modulator is after sending the short trouble alerting signal, and microcomputer modulator still can normally be monitored the temperature-sensing fire detecting of temperature sensing cable and be reported to the police.
In order to achieve the above object, a kind of line type temperature perceptron with back-up circuit provided by the invention mainly connects microcomputer modulator respectively by the temperature sensing cable two ends and forms.Temperature sensing cable be by between two metal detection conductors and around be provided with the negative temperature coefficient thermistor composition layer, metal screen layer is set outside then.Microcomputer modulator detects the change in electric between two metal detection conductors of temperature sensing cable in real time, when temperature sensing cable is heated, because the negative temperature coefficient thermistor composition resistance descends, resistance between two metal detection conductors reduces, when resistance was reduced to a constant temperature alarming threshold value, microcomputer modulator sent the constant temperature alerting signal.When short circuit between two metal detection conductors, microcomputer modulator detected two resistances between the metal detection conductor less than a short-circuit alarming threshold values, microcomputer modulator sent detecting conductor short trouble alerting signal.After microcomputer modulator sent detecting conductor short trouble alerting signal, microcomputer modulator switched to the change in electric that detects between two metal detection conductors and the metal screen layer.Microcomputer modulator detects two metal detection conductors of temperature sensing cable and the change in electric between the metal screen layer in real time, when temperature sensing cable is heated, because the layer resistance of negative temperature coefficient thermistor composition descends, resistance between two metal detection conductors and the metal screen layer reduces, when change in electric greater than one fixedly during threshold values, microcomputer modulator sends the constant temperature alerting signal.
A kind of outstanding advantage with line type temperature perceptron of back-up circuit of the present invention is: short circuit between the metal detection conductor, microcomputer modulator is sending between the detecting conductor in the short trouble alerting signal, start and use the conventional metal screen layer that uses of temperature sensing cable, continue to implement temperature-sensing fire detecting as standby detection circuit, therefore increased and behind short trouble, can continue to implement the temperature-sensing fire detecting function, had more higher security and reliability.
Description of drawings
Fig. 1 is the prior art synoptic diagram;
Fig. 2 is a kind of line type temperature perceptron synoptic diagram with back-up circuit of the present invention;
Fig. 3 is a kind of line type temperature perceptron synoptic diagram with back-up circuit of the present invention.
Embodiment
A kind of line type temperature perceptron with back-up circuit, embodiment 1, referring to Fig. 2, is to be connected to form signal acquisition circuit with microcomputer modulator 5 respectively by the temperature sensing cable two ends.Temperature sensing cable is to be provided with negative temperature coefficient thermistor composition layer 3 around reaching between the two strip metal detecting conductors 1,2,1, the 2 parallel clearance settings of two strip metal detecting conductors, the mode of extrusion molding coating is simultaneously made, again braiding or wrapped layer of metal screen layer 4 outside negative temperature coefficient thermistor composition layer 3.Microcomputer modulator 5 detects the change in electric between the two strip metal detecting conductors in real time, when temperature sensing cable is heated, because negative temperature coefficient thermistor composition layer 3 resistance descend, resistance between the two strip metal detecting conductors 1,2 reduces, when resistance is reduced to a constant temperature alarming threshold value, microcomputer modulator 5 sends the constant temperature alerting signal, and the constant temperature alarming threshold value of microcomputer modulator 5 can be established a plurality of temperature threshold values, realizes multistage constant temperature warning; When temperature sensing cable temperature rise temperature speed greater than 10 ℃/min, the resistance between two metal detection conductors reduces suddenly, microcomputer modulator 5 sends the differential temperature alerting signal according to the alarming threshold value of heating rate greater than the change in electric amount of the unit interval of 10 ℃/min; When environment temperature was got back to the normal temperature state, negative temperature coefficient thermistor composition layer 3 resistance that are provided with between two metal detection conductors raise, and the temperature-sensitive alerting signal is eliminated, and the line type temperature perceptron returns to the normal monitoring duty; When two strip metal detecting conductors 1, short circuit between 2, the short circuit resistance is during less than a short trouble alarming threshold value, microcomputer modulator 5 sends temperature sensing cable detecting conductor short trouble alerting signal, microcomputer modulator 5 is after sending temperature sensing cable detecting conductor short trouble alerting signal, microcomputer modulator 5 switches to and detects two strip metal detecting conductors 1,2 and metal screen layer 4 between change in electric, microcomputer modulator 5 detects two strip metal detecting conductors 1 of temperature sensing cable in real time, 2 and metal screen layer 4 between change in electric, when temperature sensing cable is heated, because negative temperature coefficient thermistor composition layer 3 resistance descend, two strip metal detecting conductors 1,2 and metal screen layer 4 between resistance reduce, when resistance was reduced to a constant temperature alarming threshold value, microcomputer modulator sent the constant temperature alerting signal.
When the resistance of temperature sensing cable A or another temperature sensing cable B during less than a short trouble alarming threshold value, microcomputer modulator 5 sends the two strip metal detecting conductor short trouble alerting signals of temperature sensing cable A or another temperature sensing cable B, microcomputer modulator 5 is after sending two metal detection conductor short trouble alerting signals of temperature sensing cable A or another temperature sensing cable B, microcomputer modulator 5 switches to a positive pole to two metal detection conductors of short circuit temperature sensing cable, the metal detection conductor 1 or 2 of another temperature sensing cable that does not have short circuit is as negative pole, constitute heat detection and detect the loop, can proceed detection, its principle of work is identical with embodiment 1.When the resistance of temperature sensing cable A and another temperature sensing cable B during simultaneously less than a short trouble alarming threshold value, it is two detecting conductors short circuit simultaneously of two detecting conductors and another temperature sensing cable B of temperature sensing cable A, microcomputer modulator 5 sends the detecting conductor short trouble alerting signal of temperature sensing cable A and another temperature sensing cable B, microcomputer modulator 5 switches to a positive pole to short circuit temperature sensing cable A and another temperature sensing cable B simultaneously, a negative pole, constitute heat detection and detect the loop, microcomputer modulator 5 continues to detect in real time the metal detection conductor 1 between temperature sensing cable A and another temperature sensing cable B, 2 and 1, change in electric between 2, its principle of work is identical with embodiment 1.
Described temperature sensing cable can be a multiloop.The metal detection conductor of described temperature sensing cable also can be a multicore.Described metal screen layer can be the public pole or the alternate polarities of multicore temperature sensing cable.
Material that the present invention adopts is:
1, negative temperature coefficient thermistor composition layer: cable linear temperature sensing fire detector is used routine techniques material very widely.
2, detecting conductor: choose the common metal material between diameter 0.1～2mm.
3, resistance: resistance value is chosen between 0～100M Ω.
4, braided metal layer: diameter 0.1～0.3mm, between the choosing, the common metal material.
5, wrapped metal level: thick 0.01～0.05mm, select copper metal tape, aluminum metal band between wide 5～10mm.
Claims (3)
1. line type temperature perceptron with back-up circuit, be to be connected to form signal acquisition circuit with microcomputer modulator (5) respectively by the temperature sensing cable two ends, it is characterized in that: be provided with negative temperature coefficient thermistor composition layer (3) between two strip metal detecting conductors (1) of temperature sensing cable and (2) and the metal screen layer (4), after opening circuit between two strip metal detecting conductors (1) of temperature sensing cable and (2), microcomputer modulator (5) automatically switches to the change in electric that detects between two strip metal detecting conductors (1) and (2) and the metal screen layer (4), continues to carry out in real time temperature-sensing fire detecting.
2. line type temperature perceptron with back-up circuit, be to be connected to form signal acquisition circuit with microcomputer modulator (5) respectively by the temperature sensing cable two ends, it is characterized in that: temperature sensing cable (A), another temperature sensing cable (B) have coated negative temperature coefficient thermistor composition layer (3) respectively, temperature sensing cable (A) is parallel with another temperature sensing cable (B) or twist together, and is connected with microcomputer modulator (5) then; Short circuit between two strip metal conductors (1) of temperature sensing cable (A) and (2), microcomputer modulator (5) automatically switches to the two strip metal conductors (1) that detect temperature sensing cable (A) and (2) as the metal detection conductor of anodal and another temperature sensing cable (B) the electrical signal detection loop as the negative pole formation, proceeds temperature-sensing fire detecting;
Two strip metal detecting conductors short circuit simultaneously when two strip metal detecting conductors of temperature sensing cable (A) and another temperature sensing cable (B), microcomputer modulator (5) automatically switches to the electrical signal detection loop that two strip metal conductors of the two strip metal conductors that detect temperature sensing cable (A) and another temperature sensing cable (B) constitute, and temperature-sensing fire detecting is carried out in continuation in real time.
3. it is characterized in that according to claim 1 or the described a kind of line type temperature perceptron with back-up circuit of claim 2: the metal detection conductor of described temperature sensing cable can be a multicore; Described metal screen layer can be the public pole or the alternate polarities of multicore temperature sensing cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100901822A CN102163359A (en) | 2011-04-12 | 2011-04-12 | Linear temperature sensor with spare loop |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100901822A CN102163359A (en) | 2011-04-12 | 2011-04-12 | Linear temperature sensor with spare loop |
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| CN102163359A true CN102163359A (en) | 2011-08-24 |
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| CN2011100901822A Pending CN102163359A (en) | 2011-04-12 | 2011-04-12 | Linear temperature sensor with spare loop |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636734A (en) * | 2012-05-08 | 2012-08-15 | 广西达科建筑智能工程有限公司 | Low-voltage electric fire prevention and detection device |
| CN103198603A (en) * | 2013-03-27 | 2013-07-10 | 李萍 | Temperature variation alarm line of coaxial structure |
| 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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| CN101667318A (en) * | 2009-10-22 | 2010-03-10 | 曾学义 | Linear heat fire detector and method for improving non-operating temperature rating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102636734A (en) * | 2012-05-08 | 2012-08-15 | 广西达科建筑智能工程有限公司 | Low-voltage electric fire prevention and detection device |
| CN102636734B (en) * | 2012-05-08 | 2014-01-29 | 广西达科建筑智能工程有限公司 | Low-voltage electric fire prevention and detection device |
| CN103198603A (en) * | 2013-03-27 | 2013-07-10 | 李萍 | Temperature variation alarm line of coaxial structure |
| CN103198603B (en) * | 2013-03-27 | 2016-01-06 | 李萍 | A kind of temperature variation alarm line of coaxial configuration |
| 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 |
| CN111696302B (en) * | 2020-07-03 | 2024-02-02 | 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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Application publication date: 20110824 |