Multi-sensor data fusion-based self-powered online monitoring system for transmission line

A multi-sensor data fusion-based self-powered online monitoring system for a transmission line, comprising at least one detection node, an optical communication receiving and demodulation module, and a data processing module, wherein the detection nodes each comprise a vibration energy harvesting module, a sensing module, and an optical communication modulation and transmitting module;

• the vibration energy harvesting module is configured to harvest vibration energy and convert it into electric energy for storage, to supply power to the detection node;
• the sensing module is configured to acquire a plurality of types of sensing data at a position of the detection node;
• the optical communication modulation and transmitting module is configured to modulate the plurality of types of sensing data acquired by the sensing module into an optical signal and radiate the optical signal into the air;
• the optical communication receiving and demodulation module is configured to acquire the optical signal radiated into the air, perform optoelectronic conversion and demodulation on the acquired optical signal, and send demodulated data to the data processing module;
• and
• the data processing module is configured to use a weighted least square method to fuse each type of sensing data to obtain a first fusion parameter corresponding to each type of sensing data;
• and use a fuzzy comprehensive evaluation method to analyze the first fusion parameter to obtain a monitoring result;
• wherein the vibration energy harvesting module adopts a vertical contact-separation mode triboelectric nanogenerator (TENG) to harvest the vibration energy;
• wherein the vibration energy harvesting module comprises the TENG and an electric energy management unit (3), the electric energy management unit (3) comprises a rectifier bridge and a filter circuit, an output terminal of the TENG is connected to the rectifier bridge, the rectifier bridge is connected to the filter circuit, and charges are input to the filter circuit for rectification.