Linear temperature sensor with spare circuit
A perceptron and line-type technology, applied in the direction of electric fire alarms, etc., can solve problems such as failure to send out fire alarm signals, easy short circuits, etc., and achieve high safety and reliability.
Inactive Publication Date: 2015-04-29
XIAN QUNFENG 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
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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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The invention provides a linear temperature sensor with a spare circuit. The temperature sensor mainly consists of a temperature sensing cable, and microcomputer modulators which are respectively connected with both ends of the temperature sensing cable, wherein the temperature sensing cable is formed in a manner that negative temperature coefficient heat-sensitive material layers are arranged between two metal detection conductors and at the peripheries of the metal detection conductors and metal shielding layers are arranged outside the metal detection conductors. For the linear temperature sensor with the spare circuit, when the detection conductors are short-circuited and after the short-circuited fault warning signal is sent by the microcomputer modulators, the microcomputer modulators can normally monitor the temperature sensing fire detection warning of the temperature sensing cable. The temperature sensor has the advantages that when the metal detection conductors are short-circuited, the short-circuited fault warning signal between the detection conductors is sent by the microcomputer modulators, and at the same time, the metal shielding layers of the temperature sensing cable are started to be used as the spare detecting circuit to continuously carry out the temperature sensing fire detection, and therefore, the function of the temperature sensing fire detection can be continuously carried out after the short-circuited fault is added, and the safety and the reliability are higher.
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...
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IPC IPC(8): G08B17/06
CPCG08B17/06
Inventor 不公告发明人
Owner XIAN QUNFENG ELECTRONICS INFORMATION TECH