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[求助]
把一段英文翻译成中文！谢谢！急用！
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The research on MEMS Sensors show that current sensing techniques are a very effective method of detecting wire failure as there has been reported success of wire monitoring by Aegis Devices Inc. The Rogowski Coil Current Sensor shows huge promise in detecting arcing faults due to it being able to detect fast rising transients, and may also pick up other signals from the wire or connector that would signify if corrosion, contact fretting or aging of the wire insulation has occurred. The other advantages of being non-intrusive, providing excellent isolation, good linearity, not suffering saturation issues like current transformers or Hall effect current Sensors and not being influenced by temperature make it an excellent candidate for this application. Recent papers on LTCC have shown that sensors similar to what is desired for this project can be very easily fabricated and integrated into a unit. This can be adapted to make a coil that could wrap around each wire and monitor for faults. It is likely that the design would use two coils linked in opposite polarity so as to reduce the effects of cross over from adjacent wiring. Signal processing techniques would need to be used to process the signals that pass the Rogowski coil to enable accurate detection of faults. The rogowski coil will be tested to see if it can detect the triboelectric effect also. Humidity sensors are certain to be included in this solution as part of the environmental monitoring system to aid in wire aging prognosis. The capacitive polymer humidity based relative humidity sensor was evaluated as the best choice for this application as it is the best option for monolithic integration, and its fast response time and long term reliability in harsh environments result in continous monitoring in a rapidly changing environment. It has been shown also that it is possible to design a wireless humidity sensor for remote monitoring of humidity conditions in other parts of the aircraft that may not be easily accessible. Strain gauges will be examined to see if they can detect changes in material hardness in aged and new samples of wiring to see if a relationship can be established which can tell if the wire has aged to point of failure. It is well known that vibration exists within the aircraft and that this is transferred to the wiring, therefore by looking at vibration levels as well as the strain of the wiring then this could highlight potential sites of the wiring that has failed or is near to failing. Strain gauges have been utilised on the outer structure of aircraft to detect stresses where failure may occur, and MEMS Sensors have been previously designed to address this. |
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Mally89(金币+2): 感谢应助！~欢迎常来！~好运哦！~\(^o^)/~ 2012-03-12 07:47:50
shawmar(金币+50, 翻译EPI+1): ★★★★★最佳答案 2012-03-14 13:54:15
Mally89(金币+2): 感谢应助！~欢迎常来！~好运哦！~\(^o^)/~ 2012-03-12 07:47:50
shawmar(金币+50, 翻译EPI+1): ★★★★★最佳答案 2012-03-14 13:54:15
对微机电系统传感器的研究表明，有报道称由神盾设备公司研发的罗戈夫斯基线圈电流传感器在电流传感技术线故障检测方面很有作用。它能够检测电弧故障线，因为它能检测快速上升的瞬态，也可以接收来自线圈或连接器的腐蚀、接触微动或电线的绝缘层老化等其他信号。电流传感器还有很多其它有点，例如非侵入性可提供了极好的隔离、线性度好可以避免遭受由互感器或霍尔效应导致的饱和电流、同时它也不受受温度的影响，这些优点使得其可以在此应用领域具有广阔前景。基于低温共烧陶瓷的最新研究显示，所报道的传感器和这个项目阐述的传感器类似，制作过程简单，可集成到一个单元。这可以具有更高的适应性，使线圈环绕每根电线并监视故障。像这样使用两个极性相反的线圈连接的设计可以减少了邻近布线产生的相互影响。需要将信号处理技术用于处理通过罗戈夫斯基线圈的信号，使故障得到准确检测。同时也有必要测试罗戈夫斯基线圈，看它是否可以监测到摩擦起电效应。作为环境监测系统的一部分，湿度传感器是一个解决方案，它可以帮助预估电线老化。基于湿度容性聚合物的相对湿度传感器是的最佳选择，因为它可以单片集成，并且具有快速响应时间和长时间可靠性，在恶劣和迅速变化的环境中可连续监测结果。它也已被证明这是可用于飞机设计的无线湿度传感器，但也可能不容易获得其他区域湿度条件下的远程监控信息。将要检查应变片，看它们是否能够检测到接近老化的布线和新产品材料的硬度变化，看看是否可以建立一定的关系，是否可以检测出电线老化故障点。众所周知，飞机内存在振动，该震动可被转移到布线，因此，振动水平以及布线的应变可能反应附近未布线地点的失效。应变计已成功用于飞机的外部结构，以检测由于故障产生的应力，可采用前面提及的已微机电系统传感器设计来解决这个问题。 |
2楼2012-03-12 04:34:55
