新的和引人注目的光学传感器解决方案
有时你不能使用传统的传感器。当你的设计涉及到布线挑战,噪声滤波问题,电不友好的条件下,或其他恶劣或危险的环境中,甚至当你试图处理多大的传感器可以在一个狭小的空间工作,总之这些问题可能足以让你远离传统的解决方案。在这些情况下,并在检测大面积多传感器的合理预算内的目标,工程师们不妨考虑光学传感器。
光学传感器具有重要的特性,如电磁抗扰性、电隔离、宽动态范围和多路复用能力,而且结构紧凑、重量轻。简单地说,光学传感器将光线转换成可以被仪器读取的电子信号。传感器、测量装置和光源通常集成并连接到电触发器,通过增加或减小电输出来响应信号变化。光纤或集成光学电路中的信号从电路切换到电路。这些开关或机械性质(包括磨损),电光,或磁光,其中最后两有更长的寿命。
ptical sensors measure changes in distance, force, and temperature. Four different modulations are used: intensity, phase, frequency, and polarization. Optical sensors feature a high dynamic range, are amenable to multiplexing, available in contact and non-contact modes, and have a price tag to fit every application.
Extrinsic sensors are those where light leaves the transmitting fiber to be changed before it continues to the detector via the return or receiving fiber. Extrinsic sensors are used in such applications as temperature, pressure, liquid level, and flow. They are less sensitive than their intrinsic counterpart, and easily multiplexed. They may, however, exhibit ingress/egress connection problems.
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