公开(公告)号：US09628104B2

公开(公告)日：2017-04-18

申请号：US14657323

申请日：2015-03-13

Applicant: Rosemount Inc.

Inventor： Rongtai Wang ,  John Paul Schulte

IPC: G01L9/12 ,  H03M3/00 ,  G01D5/24

CPC classification number: H03M3/39 ,  G01D5/24 ,  G01L9/0072 ,  G01L9/0075 ,  G01L9/12 ,  H03M3/356 ,  H03M3/376 ,  H03M3/494

Abstract: A single plate capacitance sensor includes a sensor capacitor and a reference capacitor that share common plate. A capacitance-to-digital sigma delta modulator provides separate sensor excitation and reference excitation signals to the sensor capacitor and the reference capacitor to provide high resolution detection. Programmable ratio-metric excitation voltages and adaptive excitation voltage sources can be used to enhance modulator performance.

公开(公告)号：US20160265995A1

公开(公告)日：2016-09-15

申请号：US14657323

申请日：2015-03-13

Applicant: Rosemount Inc.

Inventor： Rongtai Wang ,  John Paul Schulte

IPC: G01L9/00 ,  H03M3/00

CPC classification number: H03M3/39 ,  G01D5/24 ,  G01L9/0072 ,  G01L9/0075 ,  G01L9/12 ,  H03M3/356 ,  H03M3/376 ,  H03M3/494

Abstract: A single plate capacitance sensor includes a sensor capacitor and a reference capacitor that share common plate. A capacitance-to-digital sigma delta modulator provides separate sensor excitation and reference excitation signals to the sensor capacitor and the reference capacitor to provide high resolution detection. Programmable ratio-metric excitation voltages and adaptive excitation voltage sources can be used to enhance modulator performance.

Abstract translation: 单板电容传感器包括传感器电容器和共用共用板的参考电容器。 电容数字Σ-Δ调制器向传感器电容器和参考电容器提供单独的传感器激励和参考激励信号，以提供高分辨率检测。 可编程比率公制激励电压和自适应激励电压源可用于增强调制器性能。