Linear temperature sensor with spare circuit
A perceptron and line-type technology, applied in fire alarms with electrical effects, thermometers and thermometers with directly heat-sensitive electric/magnetic elements, can solve problems such as failure to send out fire alarm signals and easy short circuits, etc. Achieve high safety and reliability
Inactive Publication Date: 2015-04-29
XIAN ZAOXIN ELECTRONICS INFORMATION TECH
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Problems solved by technology
Since the two detection conductors 10, 20 are metal and have a certain hardness, the two metal detection conductors 10, 20 provided with the negative temperature coefficient heat-sensitive material layer 30 are often processed together in a twisted form, which is very easy in the application process. If a short circuit occurs, if a fire occurs during the short circuit, the cable-type linear temperature-sensing alarm device will not be able to send out a fire alarm signal
Method used
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Embodiment 2
[0010] Example 2, see image 3 , a linear temperature sensor with a backup loop, the two ends of a temperature-sensing cable A and another temperature-sensing cable B are respectively connected to a microcomputer modulator 5 to form an electrical signal acquisition circuit. The temperature-sensing cable A and the other temperature-sensing cable B are respectively provided with a negative temperature coefficient heat-sensitive material layer 3 between and around two metal detection conductors 1 and 2, wherein the two metal detection conductors 1 and 2 are arranged with a parallel gap, At the same time, it is manufactured by extrusion coating, and then the temperature-sensing cable A and another temperature-sensing cable B are twisted together. The microcomputer modulator 5 detects the electrical signal change between the two metal detection conductors of the temperature-sensing cable A and another temperature-sensing cable B in real time. The resistance between the metal detec...
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Abstract
The invention provides a linear temperature sensor with a spare circuit. The linear temperature sensor mainly includes temperature sensing cables with two ends being connected with a microcomputer modulator. The temperature sensing cables are formed by arranging a heat-sensitive material layer with a negative temperature coefficient between and on the periphery of two metal detection conductors and then arranging a metal shielding layer on the outer side of the heat-sensitive material layer. When a short circuit occurs on the detection conductors of the linear temperature sensor with the spare circuit, the microcomputer modulator can normally monitor a temperature sensing fire detection alarm of the temperature sensing cables after sending a short-circuit failure alarm signal. The linear temperature sensor provided by the invention has the advantages that when the short circuit occurs between the metal detection conductors, the microcomputer modulator can start borrowing the metal shielding layer of the temperature sensing cables as the spare detection circuit while sending the alarm signal of the short-circuit failure between the detection conductors, so as to continuously perform the temperature sensing fire detection; therefore, the function of continuously performing the temperature sensing fire detection after the short-circuit failure is additionally provided; the linear temperature sensor is relatively high in safety and reliability.
Description
technical field [0001] The invention relates to a cable-type linear temperature-sensing alarm device, which is a recoverable cable-type differential constant-temperature fire detector which can continue to monitor fire after the linear temperature sensor is short-circuited. technical background [0002] The cable-type linear temperature-sensing alarm device in the prior art is a widely used temperature-sensing fire detector. The cable-type linear temperature-sensing alarm device consists of a microcomputer modulator, a temperature-sensing cable, and a terminal resistor. The temperature-sensing cable is provided with a negative temperature coefficient heat-sensitive material layer 30 between two metal detection conductors 10 and 20, and the two metal detection conductors 10 and 20 with the negative temperature coefficient heat-sensitive material layer 30 are twisted and arranged together , and then extrude the outer sheath layer 40 together. The microcomputer modulator 50 d...
Claims
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IPC IPC(8): G08B17/06G01K7/22
CPCG08B17/06G01K7/22
Inventor 不公告发明人
Owner XIAN ZAOXIN ELECTRONICS INFORMATION TECH