Multi-loop sectional monitoring temperature-sensing electrical signal cable type linear temperature-sensitive detector

Abstract

The invention aims to provide a cable type linear temperature-sensing detector for sectionally monitoring a temperature-sensing electric signal with multi-circuit, consisting of a closed-circuit signal acquisition circuit formed by an electric signal detection device and a terminating resistance which are connected with two ends of a temperature-sensing cable respectively. The temperature-sensingcable has two or more than two detecting conductors which are sectionally coated with an NTC characteristic material layer and an insulation material layer respectively; the length of each section detecting conductor coated by the insulation material layer is twice the length of each section detecting conductor coated by the NTC characteristic material layer; two detecting conductors with coatings are alternately arranged, the arrangement can be parallel, intertwisted or wound;, and a conducting layer is wrapped or extruded, and an outer restrictive coating is extruded to manufacture the temperature-sensing cable. The cable type linear temperature-sensing detector can realize functions of differential temperature warning, fixed temperature warning, differential-fixed temperature warning, and the warning for short circuit, open circuit and outage failure, and can be used repeatedly.

Description

technical field [0001] The invention relates to a cable-type linear temperature-sensing detector for monitoring temperature-sensing electric signals in sections with multiple loops, in particular to a type of temperature-sensing detector that reduces the influence of the heating length on the alarm temperature, and the environmental temperature has little influence on the alarm temperature, which can avoid Recoverable linear heat detectors for false alarm problems. technical background [0002] The linear temperature-sensitive fire detector in the prior art is a fire detector with a wide range of uses, and the recoverable linear temperature-sensitive detector currently used: see figure 1 , the detector is composed of a temperature-sensing cable and a resistance signal measuring device. The temperature-sensing cable is respectively covered with an NTC plastic layer 11 by two detection conductors 10, and the two detection conductors are twisted together with an outer sheath 12...

AI Technical Summary

Problems solved by technology

The disadvantage of this detector is: the alarm temperature of the detector is related to factors such as the heating length, heating temperature, ambient temperature and service length of the temperature-sensing cable, and it cannot correctly judge the fire alarm temperature, so that the accuracy of the detector alarm temperature, less reliable

The disadvantage of this detector is that during the use of the detector, with the increase of the number of alarms, the cumulative length of the contact conduction area will continue to increase, so that the alarm temperature of the detector and the heated length, heated temperature and It is related to factors such as the length of use, and the fire alarm temperature cannot be correctly judged, which makes the accuracy and reliability of the detector alarm temperature lower.

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