A novel interface circuit for grounded capacitive sensors with feedforward-based active shielding

Measurement Science and Technology

Volumn 19, Issue 2, 2008, Pages

  Reverter, Ferran ^a,b   Li, Xiujun ^b   Meijer, Gerard C M ^b  

^a UNIVERSITAT POLITÈCNICA DE CATALUNYA   (Spain)

^b DELFT UNIVERSITY OF TECHNOLOGY   (Netherlands)

Author keywords

Active shielding; Capacitive sensor; Relaxation oscillator; Sensor electronic interface

Indexed keywords

CALIBRATION; ELECTRIC POWER SYSTEM INTERCONNECTION; ERROR ANALYSIS; NONLINEAR ANALYSIS;

CAPACITIVE SENSOR; RELAXATION OSCILLATOR; SENSOR ELECTRONIC INTERFACE;

SENSORS;

CALIBRATION; ELECTRIC POWER SYSTEM INTERCONNECTION; ERROR ANALYSIS; NONLINEAR ANALYSIS; SENSORS;

EID: 42549096514     PISSN: 09570233     EISSN: 13616501     Source Type: Journal    
DOI: 10.1088/0957-0233/19/2/025202     Document Type: Article

References (16)

1. Puers R 1993 Capacitive sensors: when and how to use them Sensors Actuators A 37-38 93-105
2. Baxter L K 1997 Capacitive Sensors. Design and Applications (Piscataway, NJ: IEEE)
3. Huang S M, Stott A L, Green R G and Beck M S 1988 Electronic transducers for industrial measurement of low value capacitances J. Phys. E: Sci. Instrum. 21 242-50
4. Marioli D, Sardini E and Taroni A 1993 High-accuracy measurement techniques for capacitance transducers Meas. Sci. Technol. 4 337-43
5. Ross P J 1983 A water-level sensor using a capacitance to frequency converter J. Phys. E: Sci. Instrum. 16 827-8
6. Bera S C, Ray J K and Chattopadhyay S 2006 A low-cost noncontact capacitance-type level transducer for a conducting liquid IEEE Trans. Instrum. Meas. 55 778-86
7. Haase W C 2004 Digital measurement circuit and system using a grounded capacitive sensor US Patent 6,700,392
8. Kondo K and Watanabe K 1989 A switched-capacitor interface for capacitive sensors with wide dynamic range IEEE Trans. Instrum. Meas. 38 736-9
9. Kolle C and Leary P O 1998 Low-cost, high-precision measurement system for capacitive sensors Meas. Sci. Technol. 9 510-7
10. Goes F M L and Meijer G C M 1996 A novel low-cost capacitive-sensor interface IEEE Trans. Instrum. Meas. 45 536-40
11. Li X and Meijer G C M 2002 An accurate interface for capacitive sensors IEEE Trans. Instrum. Meas. 51 935-9
12. Bracke W, Merken P, Puers R and Van Hoof C 2005 On the optimization of ultra low power front-end interfaces for capacitive sensors Sensors Actuators A 117 273-85
13. Palls-Areny R and Webster J G 2001 Sensors and Signal Conditioning 2nd edn (New York: Wiley)
14. Reverter F, Li X and Meijer G C M 2006 Stability and accuracy of active shielding for grounded capacitive sensors Meas. Sci. Technol. 17 2884-90
15. Herzog M 1988 Circuit for measuring capacitance by charging and discharging capacitor under test and its shield US Patent 4,743,837
16. Reverter F, Li X and Meijer G C M 2007 Liquid-level measurement system based on a remote grounded capacitive sensor Sensors Actuators A 138 1-8