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Composite linear temperature digital quantity and analog quantity sensing detector in two-chip structure

A technology of temperature-sensitive detector and switching value, which is applied in the direction of measuring heat, using directly heat-sensitive electric/magnetic elements, thermometers, instruments, etc., which can solve the problem of low accuracy of alarm temperature and inability to correctly judge fire alarm temperature, etc. problem, to achieve high security and reliability

Active Publication Date: 2007-10-03
SHENYANG P T SECURITY TECH
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AI Technical Summary

Problems solved by technology

The disadvantage of this detector is: the alarm temperature set by the analog signal is related to the service length and the ambient temperature, and the fire alarm temperature cannot be correctly judged, so that the accuracy of the alarm temperature of the detector is low

Method used

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  • Composite linear temperature digital quantity and analog quantity sensing detector in two-chip structure
  • Composite linear temperature digital quantity and analog quantity sensing detector in two-chip structure
  • Composite linear temperature digital quantity and analog quantity sensing detector in two-chip structure

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Embodiment Construction

[0010] A two-core structure switching value and analog compound linear temperature-sensing detector, the two ends of the temperature-sensing cable are respectively connected with the microcomputer modulator and the terminal resistors R1, R2, R3 to form a closed-circuit signal acquisition circuit, which is characterized in that the sensor The structure of the warm cable, see Figure 2 and Figure 3 for Example 1: it uses two elastic metal conductors 1, one of which is covered with an insulating material layer 2 with a Vicat softening point of 40°C to 180°C, Then wrap aluminum-plastic composite tape or copper-plastic composite tape, metal foil or conductive material layer 4, another elastic metal conductor 1 wraps semiconductor layer 3, and then wraps insulating material with a Vicat softening point of 40°C to 180°C Layer 2. Two wire cores with different covering layers are twisted together, and the twisting pitch is preferably between 20 mm and 200 mm, and then the outer sheath l...

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Abstract

The composite linear temperature sensing detector consists of one temperature sensing cable, one microcomputerized modulator and three terminal resistors connected together to form one closed circuit signal acquiring circuit. It features the structure of the temperature sensing cable comprising two stranded elastic metal conductor wires, including one covered with one insulating layer of 40-180 deg.c Vicat softening point and one outer metal foil or other conducting material layer serving as common pole, and the other covered with one semiconductor layer and one outer insulating layer of 40-180 deg.c Vicat softening point. These two wires are stranded in the pitch of 20-200 mm and covered with extruded plastic shield layer. The composite linear temperature sensing detector has high temperature sensing sensitivity, no dependence on the length, high reliability and low cost.

Description

technical field [0001] The invention relates to a cable-type linear temperature-sensing alarm device, a composite linear temperature-sensing detector with a two-core structure of switch value and analog value. technical background [0002] The linear temperature-sensitive fire detector in the prior art is a kind of fire detector that is not widely used. The linear temperature-sensitive detector currently used: consists of a switching value linear temperature-sensitive fire detector and an analog linear temperature detector. The temperature-sensitive fire detector constitutes a four-core structure temperature-sensitive detector, see Figure 1. The two conductors 11 are coated with NTC plastic layers 9 respectively, and the two conductors are twisted together, and the other two elastic conductors 12 are respectively coated with meltable plastic layers 10 and twisted together. There is an outer sheath 14 on the outside, and the signal input end of the resistance signal measurin...

Claims

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Application Information

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IPC IPC(8): G01K7/16
Inventor 张陈王文江
Owner SHENYANG P T SECURITY TECH
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