Multi-temperature impedance characteristic sensing cable and temperature-sensitive detector using the same

An impedance characteristic and multi-temperature technology, applied in the field of positionable temperature detectors, can solve problems such as inaccurate temperature, insensitive response, and inability to accurately alarm

Inactive Publication Date: 2009-02-18
侯荣琴
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  • Abstract
  • Description
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Problems solved by technology

However, the disadvantages of the distributed optical fiber detection system are: the life of the host and the risk caused by a single loop spanning too many fire compartments. In addition, for heating with a small length, such as heating below 1m, the temp

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  • Multi-temperature impedance characteristic sensing cable and temperature-sensitive detector using the same
  • Multi-temperature impedance characteristic sensing cable and temperature-sensitive detector using the same
  • Multi-temperature impedance characteristic sensing cable and temperature-sensitive detector using the same

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Embodiment Construction

[0030] The above and other technical features and advantages of the invention will be described in more detail below in conjunction with the accompanying drawings.

[0031] Referring to Fig. 2A, the sensing cable of the present invention is made of 4 metal conductors 12, two by two heat-sensitive material insulation layers 11, 13 of different temperature resistance characteristics, each wire core is twisted (as shown in Fig. 2B) or parallel (as shown in Fig. 2B ). Fig. 2C) placed, and then coated with 1 to 2 layers of outer sheaths 14, 15 to make. The metal conductor is copper wire, stainless steel wire, thermocouple wire, alloy resistance wire, other metal conductors or a combination of different conductor materials. The heat-sensitive material is NTC (negative temperature is a number), PTC (positive temperature is a number), other non-melting "tunneling effect" recoverable heat-sensitive materials, or meltable materials. The purpose of the design is: first, to ensure that t...

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Abstract

The invention discloses a multi-temperature impedance characteristic sensing cable, and a temperature detector using the sensing cable; the sensing cable is composed of 2 to 6 metal conductors, recoverable insulating layers with different temperature impedance characteristics, as well as 1 to 2 layers of outer jackets; each metal conductor sequentially comprises 1 to 2 insulation layers which are twisted into ropes; the twisted ropes are arranged in the 1 to 2 layers of outer jackets; the temperature detector is composed of a temperature sensing interface unit, sensing cables corresponding to the temperature impedance characteristics, and the cable terminal units; and the temperature sensing interface unit is mainly composed of a signal amplification and linearization circuit, an analog/digital conversion circuit, a microprocessor circuit (MCU), a display and operation circuit, a pulse output circuit and a timer circuit. The temperature detector can achieve the differential temperature, stationary temperature or differential stationary temperature alarm of the low, medium, high temperature ranges.

Description

technical field [0001] The invention relates to a sensing cable and a positionable temperature-sensitive detector composed of the sensing cable. Background technique [0002] Since the 1970s, linear temperature-sensitive detectors have been developed and widely used abroad. They have advantages that ordinary typical temperature-sensitive detectors do not have: continuous monitoring of areas along the line, strong ability to withstand harsh environments, etc. . The development of linear temperature detectors has also gone through multiple stages, from switching linear temperature detectors to analog linear temperature detectors, to continuous thermocouple temperature detectors, and the development in the past ten years Of course, the detectors at each stage of development have their own advantages and disadvantages. [0003] The recently developed continuous temperature measurement and positioning detector and distributed optical fiber temperature measurement and detection ...

Claims

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Application Information

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IPC IPC(8): G01K7/00G01K7/02G01K7/16G08B17/06
Inventor 侯荣琴
Owner 侯荣琴
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