The cable trench is in an underground environment and the surrounding humidity is high. The cable intermediate joint is in this environment for a long time. If the airtightness of the cable intermediate joint is damaged, moisture enters the cable intermediate joint. Once the humidity of the intermediate joint exceeds the normal value, it may cause a power accident. By placing a humidity sensor at the cable intermediate joint, the humidity around the intermediate joint can be effectively monitored, and an alarm will be issued once the humidity is abnormal which can reduce losses. In this paper, an energy harvesting flexible humidity sensor with edge computing is proposed for the power cable scenario. The sensor end uses the median mean filtering algorithm to process the measured data, and then judges whether the humidity is abnormal, and transmits the measured data and judgment results to the monitoring system. The sensor does not need batteries, and the sensor power is collected by collecting the electric field energy and thermal energy around the intermediate joint which make sensors more sustainable. The flexible design allows the sensor to be placed arbitrarily in the narrow environment of the intermediate joint and can expand the measurement area which makes the humidity measurement more accurate.

Flexible humidity sensor based on edge computing and energy harvesting

In the current temperature measurement methods of various electrical equipment, such as distributed optical fiber temperature measurement, infrared thermal imager, temperature display wax temperature measurement technology, active wireless temperature measurement technology, etc., these technologies have corresponding bottlenecks restricting them development of. With the development and application of flexible temperature sensors, this paper proposes the application of flexible temperature sensors in the temperature measurement of cable intermediate joints. Due to the characteristics of the flexible sensor itself, it has many advantages in the temperature measurement of cable intermediate joints, such as easy installation and reliable performance. Compared with traditional distributed temperature sensors, the temperature measurement is more accurate and reliable, but considering the complexity and diversity of the environment in which the power grid is located, the universality of flexible temperature sensors needs to be improved in the future.

Application of temperature measurement in cable intermediate joint based on flexible sensor

In long-distance cable transmission lines, it is difficult to avoid induced voltages existing in the outer protective layer of the cable metal, so the existing safety hazards of cable transmission lines require us to conduct real-time temperature insulation monitoring of the cables. Compared with the fixed point sensor, this paper proposes a nano-flexible sensor that facilitates real-time infrared temperature monitoring of a certain area of cable in a complex environment, and timely early warning of faults at the cable joint through the Internet of Things architecture.

Application of nano-infrared flexible temperature sensor based on Internet of things in cables

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Flexible humidity sensor based on edge computing and energy harvesting

Application of temperature measurement in cable intermediate joint based on flexible sensor

Application of nano-infrared flexible temperature sensor based on Internet of things in cables