【摘要】 为提高锂电池温度在线监测能力，通过双路解调方案构建分布式拉曼光纤温度测试系统，采用外部触发方式，实现相互协调的工作状态。温度测试结果表明，常温状态下系统各通道距离10 m范围的温度精度达到±1℃。经过8次测试后温度值误差均在0.17℃内，表明系统常温条件下可以保持良好的稳定性，满足设计条件。该系统能够满足锂电池的测温要求，能够对锂电池局部温度异常情况进行准确反馈，有效预防锂电池各类事故。10 m传感距离内行程误差最大值只有2 m,符合锂电池测温要求。模拟试验测试结果表明，该系统能够对故障进行准确辨别与定位，表明系统具备优异的分布式测试性能。DTS系统可以达到±1 m的分辨能力，可以快速响应锂电池故障引起的温度变化。更多还原

【Abstract】 To improve the on-line monitoring ability for lithium battery temperature, a distributed Raman fiber temperature measurement system was set up by dual-channel demodulation scheme, which adopted an external trigger mode to realize the coordinated working state. Results show that the temperature accuracy of each direction reaches ±1 ℃ within the distance of 10 m at normal temperature. After 8 tests, the temperature errors are all within 0.17 ℃, indicating that the system can maintain good stability at room temperature and meet the design conditions. The system can meet the requirements of temperature measurement for lithium battery, accurately feedback the abnormal local temperature, and effectively prevent various accidents cause by lithium battery. Within 10 m sensing distance, the maximum error is only 2 m, which meets the temperature measurement requirements of lithium batteries. Simulation test results show that the system can identify and locate faults accurately, which proves that the system has excellent distributed testing performance. The DTS system can achieve a resolution of ±1 m that can quickly respond to the temperature change caused by lithium battery failure.更多还原