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| 1 | 基于光纤动态感知技术在电缆通道在线监控中的研究与实现显示文摘面对大量需管控的施工工地、快速增长的电缆通道长度,仅靠传统的人工巡检模式已无法满足24小时全方位、不间断的监控要求,各类外力损坏、外部人员非法入侵偷盗等偶发性故障日益增多,严重威胁高压电缆的安全运营及电缆通道的有序管理。针对上述问题,对高压电缆通道采用综合监控管理技术,本文基于分布式光纤振动传感系统的理论依据,并结合一起上海中环中心建筑爆破对周边110kV电缆及通道的影响,提出了相应的预防措施。通过建立复杂振动的数学模型,再结合光纤传输振动信号的原理,分析不同类型的振动波形并建立数据库,从而对电缆通道内外的各类外破信号进行全方位监控、智能分析和精确定位并实时报警。现场结果表明,提出的监测方案和应对措施是有效的,成功解决了建筑爆破中电缆防外破的问题。 | 严其强 朱亦凡 郭婉华 宣辰扬 张曹锋 何邦乐 | 2022 | 电力大数据2022，25，10： | 0 |
| 2 | Effect of irradiation on temperature performance of dispersioncompensation no-core cascade optical-fiber sensor coated with polydimethylsiloxane film显示文摘A temperature measurement device can produce data deviations and can even be damaged in a high-dose radiation environment.To reduce the radiation damage to such a device and improve the temperature measurement accuracy in a radiation environment,a temperature sensor based on optical-fiber sensing technology is proposed.This sensor has a cascade structure composed of a single-mode fiber(SMF),a dispersion-compensation fiber(DCF),a nocore fiber(NCF),and another SMF(SDNS).The DCF and NCF are coated with a polydimethylsiloxane(PDMS)film,which is a heat-sensitive material with high thermal optical and thermal expansion coefficients.In experiments,PDMS was found to produce an irradiation crosslinking effect after irradiation,which improved the temperature sensitivity of the SDNS sensor.The experimental results showed that within a range of 30–100℃,the maximum temperature sensitivity after irradiation was 62.86 pm/℃,and the maximum transmission sensitivity after irradiation was 3.353×10^(-2)dB/℃,which were 1.22 times and 2.267 times the values before irradiation,respectively.In addition,repeated temperature experiments verified that the SDNS sensor coated with the PDMS film had excellent temperature repeatability.Furthermore,it was found that with an increase in the irradiation intensity,the irradiation crosslinking degree of PDMS increased,and the temperature sensitivity of the sensor was improved.The proposed sensor could potentially be applied to temperature measurement in a nuclear-radiation environment. | Fang Wang Qiu-Feng Wu Yu-Rong Jiang Chan Jin Xiao-Hui Wang Ben-Shang Zhang Chun-Wang Ma | 2022 | Nuclear Science and Techniques2022，33，9： | 0 |
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