In the long-term unattended condition, the continuous operation of bridge safety monitoring micro-system (BSMMS) in mountain areas has the issue of insufficient energy supply. Therefore, a photovoltaic-thermoelectric hybrid power generation system (PV-TEG) is proposed to power the temperature, wind speed, and tilt sensors of BSMMS. The power generation performance and characteristics of PV and TEG are experimentally investigated to find the operation mode to match the bridge monitoring. In addition, the intermittent operation mode of BSMMS is optimized to achieve longer running times. The experimental results show that the output voltage and power generation of the PV-TEG can meet the energy consumption demands of all sensors. TEG power generation is linear with bridge temperature, which can trigger TEG to support the temperature sensor operation. The energy storage battery supports the BSMMS to run for 8.99 days in the mode of running 5 min every 5-min intervals. Optimizing the operation time and interval of the BSMMS to run once in half an hour, it can run continuously for up to 17.97–22.46 days. This work provides a reference for the design of an unattended self-powered energy supply system for a multi-parameter integrated bridge safety monitoring system.

中文翻译：

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桥梁安全监测微系统光伏热电供电系统的性能和运行优化

山区桥梁安全监测微系统（BSMMS）在长期无人值守的情况下持续运行，存在能源供应不足的问题。因此，提出了一种光伏热电混合发电系统（PV-TEG）来为BSMMS的温度、风速和倾斜传感器供电。对PV和TEG的发电性能和特性进行实验研究，寻找与桥梁监测相匹配的运行模式。此外，对BSMMS的间歇运行模式进行了优化，以实现更长的运行时间。实验结果表明，PV-TEG的输出电压和发电量能够满足所有传感器的能耗需求。 TEG发电量与电桥温度呈线性关系，可触发TEG支持温度传感器运行。储能电池支持BSMMS在每5分钟运行5分钟的模式下运行8.99天。优化BSMMS的运行时间和间隔为半小时运行一次，可连续运行长达17.97-22.46天。该工作为多参数综合桥梁安全监测系统无人值守自供电供能系统的设计提供参考。