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Short circuit alarming method for non-recoverable linear temperature sensing detector

A technology for temperature-sensitive detectors and short-circuit alarms, which can be used in electric fire alarms, thermometers and instruments with directly heat-sensitive electric/magnetic elements, and can solve problems such as separation, poor reliability, and false alarms , to achieve the effect of improving reliability

Active Publication Date: 2007-08-15
SURELAND IND FIRE SAFETY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this short-circuit alarm method is relatively simple, whether it is due to mechanical or other (rat bite) external forces that cause complete conductive contact between the detection conductors 3 in the linear temperature sensing element, that is, a short-circuit fault situation, or due to fire As a result, complete conductive contact occurs between the detection conductors 3 in the linear temperature sensing element, that is, a short-circuit fire situation. This short-circuit alarm method cannot distinguish these two situations, but can only send a short-circuit fire alarm signal, which will Causes false alarms, so reliability is poor

Method used

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  • Short circuit alarming method for non-recoverable linear temperature sensing detector

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Embodiment 1

[0015] The non-recoverable linear temperature-sensing detector adopted in the short-circuit alarm method provided by the present invention mainly includes a linear temperature-sensing element, a conversion box and a terminal resistor. As shown in FIG. 3 and FIG. 4 , the linear temperature sensing element mainly includes two detection conductors 4 and 5 arranged in parallel and an NTC characteristic barrier layer 6 arranged in parallel between the detection conductors 4 and 5 . The detection conductors 4 and 5 can be arranged in parallel, winding or coaxial manner, and at least one of them is an elastic conductor, such as elastic steel wire or memory alloy wire, and the other one can be a metal wire. The memory alloy wire can adopt nickel-titanium memory alloy, nickel-titanium-copper memory alloy, iron-based memory alloy, copper-based memory alloy and other materials with memory function, etc., and the design value of its martensitic reverse phase transformation final temperatur...

Embodiment 2

[0020] This embodiment is an improvement on the basis of the previous embodiment: one of the detection conductors 4 and 5 in the linear temperature sensing element is made of thermocouple wire, so that when a short circuit occurs in the linear temperature sensing element, it is connected with the other detection conductor. The conductors form a temporary thermocouple. In this case, the conversion box will detect the voltage (or potential) value or the rate of change of the voltage value on the linear temperature sensing element with the ambient temperature in real time, and based on the voltage (or potential) of the linear temperature sensing element ) value or the rate of change of the voltage value sends out different alarm signals. In addition, the thermocouple wire can be one of metal materials such as constantan (copper-nickel), nickel silicon, tungsten, chemically pure iron, copper, molybdenum, chemically pure copper, nickel chromium, nickel, platinum, silver, etc. , an...

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Abstract

This invention relates to one shortcut alarm method for in-restorable linear temperature detector, which comprises the following steps: processing the real time testing, memory by use of the switch case of the sensor element on detector conductor; when it tests the shortcut, the switch case is to separately send out shortcut fault and fire situations alarms when in advance certain inner electricity parameters memory value is super one valve value so to avoid error alarm to improve the alarm reliability.

Description

technical field [0001] The invention relates to a short-circuit alarm method for a linear temperature-sensitive detector, in particular to a short-circuit alarm method for a non-recoverable linear temperature-sensitive detector. Background technique [0002] The linear temperature sensing detector is a widely used fire detector at present. It usually consists of a linear temperature sensing element and one end connected to the linear temperature sensing element. Value) for detection, and according to the size or change rate of the alarm electric parameter (or sampled value) of the conversion box that outputs the fire alarm signal, the other end of the line-type temperature sensing element can be open or connected to a sensor that can activate under normal conditions Terminal resistance for open circuit monitoring, and according to the structure of the linear temperature sensing element, it is divided into two types: recovery type and non-recovery type. Fig. 1 and Fig. 2 are...

Claims

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Application Information

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IPC IPC(8): G08B17/06G01K7/00H01B7/00
Inventor 张卫社李刚进
Owner SURELAND IND FIRE SAFETY
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