| 发明名称 | Self calibrating micro-fabricated load cells | ||
| 摘要 | Self calibrating micro-fabricated load cells are disclosed. According to one embodiment, a self calibrating load cell comprises a resonant double ended tuning fork force sensor and a phase locked loop circuit for detection of frequency changes upon external load application to the resonant double ended tuning fork force sensor. | ||
| 申请公布号 | US9228916(B2) | 申请公布日期 | 2016.01.05 |
| 申请号 | US201313842152 | 申请日期 | 2013.03.15 |
| 申请人 | THE REGENTS OF THE UNIVERSITY OF CALIFORNIA | 发明人 | Valdevit Lorenzo;Azgin Kivanc |
| 分类号 | G01L25/00;G01L1/00;G01L1/10;G01N33/20 | 主分类号 | G01L25/00 |
| 代理机构 | One LLP | 代理人 | One LLP |
| 主权项 | 1. A self calibrating load cell, comprising: a resonant double ended tuning fork force sensor; and a phase locked loop circuit for detection of frequency changes upon external load application to the resonant double ended tuning fork force sensor; wherein the resonant double ended tuning fork sensor has a zero-load resonance frequency (ωn,o,op) and a zero-load scale factor (αo,op); and wherein, during calibration, a load on the resonant double ended turning fork force sensor is obtained according to a calibration curve equation: Fappl=(ω2n,0p−ω2n,o,0p)/(2*αo,op*ωn,o,0p). | ||
| 地址 | Oakland CA US | ||