| Title |
A Study on a Highly Sensitive Strain Sensor based on Rayleigh Wave |
| Authors |
이기정(Lee, Ki Jung) ; 조민욱(Jo, Minuk) ; Fu, Chen(Fu, Chen) ; 은경태(Eun, Kyoungtae) ; 오해관(Oh, Haekwan) ; 좌성훈(Choa, Sung-Hoon) ; 양상식(Yang, Sang Sik) |
| DOI |
https://doi.org/10.5370/KIEE.2014.63.4.495 |
| Keywords |
Surface acoustic wave ; Strain sensor ; YX-LiNbO_3 ; Finite element method |
| Abstract |
Piezoresistive-type, capacitive-type, and optical-type sensors have mainly been used for measuring a strain. However, in building a sensor network for remote monitoring using these conventional sensors there are disadvantages such as the complexity of a measuring system including wireless communication circuitry and high cost. In this paper, we demonstrates a highly-sensitive surface acoustic wave (SAW) strain sensor which is advantageous to harsh environments and wireless network. We designed and fabricated the SAW strain sensor. The SAW strain sensor attached on a specimen was tested with a tensile tester. The strain on the sensor surface was measured with a commercial strain gauge and compared with that obtained from strain analysis. The central frequency shift of the SAW sensor was measured with a network analyzer. The sensitivity of the SAW strain sensor is 134 Hz/με which is high compared to previous results. |