Yang Cheng-Hao, Chien Jui-Hung, Wang Bo-Yan, Chen Ping-Hei, Lee Da-Sheng
Department of Mechanical Engineering, National Taiwan University, No. 1, Roosevelt Rd Sec. 4, Taipei 10617, Taiwan.
Biomed Microdevices. 2008 Feb;10(1):47-54. doi: 10.1007/s10544-007-9108-9. Epub 2007 Jul 31.
This paper presents a flexible wetness sensor whose detection signal, converted to a binary code, is transmitted through radio-frequency (RF) waves from a radio-frequency identification integrated circuit (RFID IC) to a remote reader. The flexible sensor, with a fixed operating frequency of 13.56 MHz, contains a RFID IC and a sensor circuit that is fabricated on a flexible printed circuit board (FPCB) using a Micro-Electro-Mechanical-System (MEMS) process. The sensor circuit contains a comb-shaped sensing area surrounded by an octagonal antenna with a width of 2.7 cm. The binary code transmitted from the RFIC to the reader changes if the surface conditions of the detector surface changes from dry to wet. This variation in the binary code can be observed on a digital oscilloscope connected to the reader.
本文介绍了一种柔性湿度传感器，其检测信号被转换为二进制代码，通过射频（RF）波从射频识别集成电路（RFID IC）传输到远程读取器。该柔性传感器的固定工作频率为13.56 MHz，包含一个RFID IC和一个传感器电路，该传感器电路采用微机电系统（MEMS）工艺制造在柔性印刷电路板（FPCB）上。传感器电路包含一个梳状传感区域，该区域被一个宽度为2.7厘米的八角形天线包围。如果探测器表面的表面条件从干燥变为潮湿，从RFIC传输到读取器的二进制代码就会改变。这种二进制代码的变化可以在连接到读取器的数字示波器上观察到。
