Micro Flow Sensor Based on Frequency Measurement of Micro Whistles
| Periodical | Advanced Materials Research (Volumes 468 - 471) |
|---|---|
| Main Theme | Automation Equipment and Systems |
| Edited by | Wenzhe Chen, Pinqiang Dai, Yonglu Chen, Dingning Chen and Zhengyi Jiang |
| Pages | 2061-2064 |
| DOI | 10.4028/www.scientific.net/AMR.468-471.2061 |
| Citation | Yan Bin Di et al., 2012, Advanced Materials Research, 468-471, 2061 |
| Online since | February, 2012 |
| Authors | Yan Bin Di, Ying Miao |
| Keywords | Flow Sensor, Fluid Properties, Frequency, Micro Whistle, Oscillator, Polymer |
| Price | US$ 28,- |
In this work, several millimeter sized micro whistles have been tested as potential frequency analog gas flow sensors. The characteristic curves of the whistles were systematically investigated as a function of geometrical dimensions, the kind of gas applied, and temperature. Both a micro¬phone and a PVDF foil were employed to record the frequencies. The relation be¬tween oscillation frequency and volume flow rate only shows a weak function of fluid properties and temperature. At a given flow rate, the difference of argon and nitrogen is 120 Hz on average, which is corresponding to 1.4 %. For air flow at a given flow rate, frequency rises approximately 380 Hz (2.73 %) per 10 °C. This kind of micro whistle could be employed as gas flow sensor which is insensitive to fluid properties.
