RFID Cable Joint Temperature Sensor
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Solution Overview
Problem
Existing methods for monitoring the temperature of underground cable joints are inadequate, as they often fail to accurately measure the temperature of conductor cores due to technical limitations, and the use of optical fibers is restricted by breakage and measurement inaccuracies, leading to potential fire hazards and economic losses.
Innovation Solution
A temperature measurement device comprising a built-in temperature measurer and an outside receiver that uses radio frequency identification (RFID) technology to measure conductor core temperatures without damaging the insulating layers, transmitting data through silicone rubber and providing real-time monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If optical fibers are implanted into cables to measure temperature, then temperature detection capability is improved, but measurement precision deteriorates because the measured values are temperatures of the parts where optical fibers are implanted, not the real temperatures of conductor cores
Solution Approach 1:
The patent introduces a temperature sensor as an intermediary element that directly contacts the conductor core to measure its temperature. This sensor is coupled to the RFID tag, allowing the temperature data to be wirelessly transmitted without requiring direct optical fiber contact with the conductor core, thus achieving accurate measurement while maintaining system integrity
Solution Approach 2:
The patent replaces the mechanical implantation of optical fibers into the cable structure with a wireless RFID-based measurement system. The temperature sensor measures the conductor core temperature directly, and the data is transmitted wirelessly via RFID tags and readers, eliminating the need for physical fiber optic integration that compromises measurement accuracy
2Productivity
If optical fibers are implanted into cables for temperature measurement, then on-line monitoring is enabled, but reliability deteriorates because optical fibers are liable to break off under traction force and flexural deformation
Solution Approach 1:
The patent introduces RFID tags and readers as intermediary components that enable wireless communication between the temperature sensor and the monitoring system. This eliminates the need for physical optical fiber connections that are susceptible to breakage, thereby maintaining on-line monitoring capability while significantly improving system reliability
Solution Approach 2:
The patent changes the physical state and communication method from wired optical fiber transmission to wireless RFID-based transmission. By using electromagnetic fields for data communication instead of physical fiber connections, the system maintains monitoring functionality while becoming resistant to mechanical stresses such as traction and flexural deformation
3Measurement precision
If temperature sensors are placed inside cable joints, then measurement precision is improved, but device complexity increases due to the need for integration within insulating layers
Solution Approach 1:
The patent merges the temperature sensor, RFID tag, and power supply into a single integrated temperature measurement device. This consolidated design simplifies the integration process within cable joints by reducing the number of separate components that need to be installed and coordinated, while still achieving accurate conductor core temperature measurement through direct sensor contact
4Ease of manufacture
If existing monitoring systems are used, then installation is simple, but measurement precision deteriorates because they fail to accurately measure conductor core temperatures
Solution Approach 1:
The patent uses RFID tags and readers as intermediaries to bridge the gap between simple installation requirements and accurate measurement needs. The temperature sensor directly contacts the conductor core for accurate measurement, while the RFID system enables wireless data transmission that maintains installation simplicity by eliminating complex wiring requirements
Solution Approach 2:
The patent replaces complex wired measurement systems with a wireless RFID-based system. This substitution maintains ease of installation by eliminating the need for extensive wiring and connection work, while simultaneously improving measurement precision through direct temperature sensor contact with the conductor core
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate, real-time temperature measurement of conductor cores in high-temperature and high-pressure environments, minimizing the risk of accidents and economic losses by providing timely warning and prevention measures.
Implementation Method 1
The temperature sensor contacts with the copper connection pipe of the cable joint directly
Implementation Method 2
all the inner circuits are supplied power by the outside receiver in the electromagnetic induction mode
Implementation Method 3
transmitting data through silicone rubber and providing real-time monitoring
Data Source
AI summary
The invention provides a method and a device for on-line measuring the inner temperature of a cable joint, the device includes a built-in temperature measurer and an outside receiver. The built-in temperature measurer measures the temperature of the cable joint or a core wire surface by means of direct contact measuring method, and transmits the data to the outside receiver through an insulating layer by means of the radio frequency identification technique. At the same time, the outside receiver supplies power energy to the built-in temperature measurer by means of the radio frequency signal, so it resolves the problem of supplying power to the built-in temperature measurer. The device of the invention has the advantage of accurately measuring temperature, small volume, superior applicability and so on.