Smart Optic Fiber Mattress for Animal Sleep Continuous Monitoring Based Multi-Modal Interferometer

A smart optic fiber mattress for animal sleep continuous monitoring based on a multi-modal interferometer is presented. The sensor is fabricated by splicing two single mode fibers (SMFs) and a multimode fiber (MMF) with a grid structure. Due to the network structure of the sensor, it has wider contact surface for monitoring vital signs and reduces the detection difficulty caused by the change of measured object position. The sensing unit can be placed under the dog mattress. Experimental results show that it can continuously monitor the sleeping activities and respiration of the dog. The detected information includes activity rhythm, sleeping state and sleeping respiratory rates (SRR). This technique avoids some potential problems such as injuring caused by the sensor appendage and dispute caused by moral principles. It is qualified to be widely used in health care of pets and protection of wildlife.