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Development of Biomedical Transducer by Use of Optical Fiber Sensor and Actuator

利用光纤传感器和执行器开发生物医学传感器

基本信息

批准号：
63044037
负责人：
TOGAWA Tatsuo
金额：
$ 3.65万
依托单位：
Institute for Medical and Dental Engineering, Tokyo Medical and Dental University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63044037/
关键词：
Optical fiber Solar cells Laser diode Power-feed IC temperature sensor Temperature measurement Fiber optic communication

项目摘要

Fiber optic sensors have advantages in a number of application, especially in the medical field. An optical power-feed system has been designed to supply power to devices which can be used in hazardous and noisy environment such as high voltage power systems. However, the available power of the earlier reported system was around 150 muW and was too low for the power supply to conventional devices. The aim of this work is to develop an optical power-feed system in order to sypply enough power to a conventional sensor element such as temperature monitors.Laser light was transmitted to solar cells where the energy is accumulated. A laser diode (SLD304XT, the wave length 813 mm, maximum optical power 800 mW) was used as a light source. A laser diode with graded-index fiber (230mum in core diameter) was used. Eight solar cells connected in series are assembled around the fiber end. Each solar cell (S-4V, United Detector Technology) had an active area was 0.5 x 0.27 cm. The maximum optical power measured in the tip of a graded-index optical fiber was 800 mW. The temperature measurement circuit with IC temperature sensor was tested. The output signal was converted into a digitized, coded signal by the optical transmitting circuit. The digitized signal was transmitted along another optical fiber to the light-measuring instrument. A light link diode (SFH 751, Siemens) was used for optical signal transmission.The open-circuit voltage of the eight solar cell was about 4 V and the short-circuit was about 6 mA. Total current consumption of the sensor circuit was about 3 mA. The digitized signal could be trans-mitted by a light-link diode feeded with less than 2 mA. The result indicates that the system can be used as power supply for conventional sensor elements, especially with potentially long transmission distance and immunity to electromagnetic interference.

光纤传感器在许多应用中具有优势，特别是在医疗领域。设计了一种光学馈电系统，用于向高压电力系统等危险和噪声环境中使用的设备供电。然而，较早报道的系统的可用功率为约150 μ W，并且对于传统设备的功率供应来说太低。本研究的目的是开发一种光学供电系统，以向传统的传感器元件（如温度监测器）提供足够的能量，激光传输到太阳能电池，在那里能量被积累。使用激光二极管（SLD 304 XT，波长813 mm，最大光功率800 mW）作为光源。使用具有渐变折射率光纤（芯直径为230 μ m）的激光二极管。八个串联的太阳能电池组装在光纤端部周围。每个太阳能电池（S-4V，United Detector Technology）具有0.5 X 0.27cm 2的有效面积。在梯度折射率光纤的尖端中测量的最大光功率为800 mW。对采用IC温度传感器的温度测量电路进行了测试。输出信号由光发射电路转换成数字化的编码信号。数字化的信号沿沿着另一光纤传输到光测量仪器。光连接二极管（SFH 751，Siemens）用于光信号传输，八个太阳能电池的开路电压约为4V，短路电压约为6 mA。传感器电路的总电流消耗约为3 mA。数字化后的信号可通过一个电流小于2 mA的光链路二极管传输。结果表明，该系统可以作为传统传感器元件的电源，特别是具有潜在的长传输距离和抗电磁干扰。