The working principle of temperature measurement cables-INNO

Принцип роботи кабелів вимірювання температури

A temperature measurement cable is a cable that can monitor temperature changes in real time, measure the amplitude of temperature changes over time, and the monitored temperature is the highest temperature in the entire measured area. Temperature measurement cables can be connected with corresponding supporting equipment to achieve computer remote monitoring and measurement of multiple locations, large-scale temperature groups, and changes. They can be widely used in various storage industries, сільське господарство, mining, fisheries and other environments, operating equipment, preservation and other temperature monitoring and control system signal sensing systems. Загалом, temperature measurement cables are composed of temperature sensors, wires, tensile steel wire ropes, і піхви. Self temperature measuring cables are mainly used in densely populated hospitals, школи, shopping malls, and other scenarios. They have good fire resistance performance and can still ensure normal power supply in the event of a fire around the cable. Крім того, the cable produces almost no gas that poses a threat to human life during prolonged combustion; And the cable has a self temperature measurement function, which can give an alarm in advance when the cable temperature is abnormal, so as to evacuate people in a timely manner; It can accurately locate the location of temperature anomalies, promptly troubleshoot faults, avoid fires, and solve problems in existing technologies.

How to install temperature measurement cables

The widely used technologies in cable temperature measurement include thermocouple temperature measurement and fiber optic temperature measurement. The principle of thermocouple temperature measurement is that the resistance of the thermocouple changes with the temperature, in order to convert the temperature signal into an electrical signal and measure it. Thermocouple temperature measurement has a simple structure, низька вартість, and mature technology. Проте, due to the fact that thermocouples can only perform point type temperature measurement, they cannot monitor the temperature of the entire cable line online, so they have certain limitations. Fiber optic has the advantages of low cost, відсутність електромагнітних перешкод, small size and light weight, висока точність вимірювань, and easy installation. Розподілена волоконна оптика temperature measurement technology can achieve long-term monitoring of logarithmic kilometers of power lines using a single fiber optic cable

Requirements for temperature measurement cable sensors

In intelligent temperature measurement cables, the wires include: wire core, inner shielding layer, insulating material, outer shielding layer, protective sleeve, and metal shielding layer; The wire core is made of copper or aluminum wire, and the inner shielding layer is composed of semiconductor material, which surrounds the surface of the wire core and has an equal potential with the wire core to prevent partial discharge between the wire core and insulation material. The insulation material is cross-linked polyethylene, which surrounds the outside of the wire core and inner shielding layer. Зовнішній екрануючий шар складається з напівпровідникового матеріалу, який оточує поверхню ізоляційного матеріалу для запобігання часткового розряду між ізоляційним матеріалом і захисною оболонкою. Металевий екрануючий шар оточує зовнішню частину захисної оболонки для підключення струму витоку до сітки заземлення; В якості наповнювача використовуйте флізелін; Оптоволоконна канавка розміщена на осі трижильного кабелю живлення. У кабелі інтелектуального вимірювання температури, волокно для вимірювання температури розміщується в центрі канавки для розміщення волокна. Досягнуто вимірювання та зберігання температури в різних точках трижильного кабелю живлення. Для усунення зовнішніх перешкод використовується вбудоване оптоволокно, and the optical fiber is installed in the center of the three core cable, improving the uniformity and accuracy of temperature measurement. Одночасно, it has increased the service life of temperature measuring optical fibers. Provide implementation basis for power cable fault detection and current carrying capacity control

How much does a temperature measurement cable usually cost per meter

There are many prices for temperature measurement cables, and there are many manufacturers of cable temperature measurement devices with different technical capabilities. Please consult FJINNO for the latest quotation for temperature measurement cables.