Design of a capacitive-sensor signal processing system with high accuracy and short conversion time

Hou, An Sang; Su, Susan Xiao-Ping

doi:10.1016/j.sna.2004.09.012

Cited by 11 publications

(3 citation statements)

References 7 publications

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“…[22] an interface circuit based on a three-phase time sequence is described, applied to a differential capacitive sensor pair. [22] an interface circuit based on a three-phase time sequence is described, applied to a differential capacitive sensor pair.…”

Section: Interfacingmentioning

confidence: 99%

Capacitive Sensors

Regtien

2012

Sensors for Mechatronics

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Section: Interfacingmentioning

confidence: 99%

Capacitive Sensors

Regtien

2012

Sensors for Mechatronics

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“…In addition, regardless of the resistive, piezoelectric, capacitive or optical sensing methods, their outputs are weak analog electrical signals that are susceptible to noise. Thus, a complex signal processing system with the functions of amplification and filtering is required to condition these signals [27], which is critical to the sensor characteristics. As a result, the above problems limit their scope of applications.…”

Section: Introductionmentioning

confidence: 99%

A Variable Configuration Force Sensor With Adjustable Resolution for Robotic Applications

Sun

Chen

Xiong

et al. 2023

IEEE Trans. Ind. Electron.

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Multitask measurements with different measuring ranges and resolutions have put forward higher requirements for force sensors. This paper presents a novel variable configuration approach to develop an adjustableresolution force sensor with a compact force-sensitive structure. Unlike the traditional strain gauge-based force measurement, the external force is detected through measuring the displacement of the deformed structure with a precision optical linear encoder. This approach can enable variable measuring range and force resolution through the continuous adjustment of structural stiffness. Specifically, the stiffness adjustment is implemented by changing the second moment of area of the sensor structure through rotating its build-in flexure beam shafts. Analytical models are established to provide the theoretical basis for analysis and design of the sensor. Further, the validity of the design is evaluated with finite element simulations. Finally, a sensor prototype is developed for performance evaluation and applied for the wire bond pull tests to evaluate the bond strength on the printed circuit board assembly. Experimental results show that it is effective to change the measuring range and force resolution of the developed force sensor through the stiffness adjustment.

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“…In general, emphasis in this field has been placed on developing new signal processing systems [4,5] and sensor interfaces [4,6,7] in order to increase the accuracy of capacitance measurement. Nearly all of the existing applications are based on planar or cylindrical metallic electrodes.…”

Section: Introductionmentioning

confidence: 99%

Mesoporous gold electrodes for sensors based on electrochemical double layer capacitance

Mortari

Maaroof

Martin

et al. 2007

Sensors and Actuators B: Chemical

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The use of mesoporous gold as electrode material for measurement of electrochemical capacitance is investigated. The electrodes possess a pore size in the range of 10 to 30 nm and are prepared by de-alloying films of AuAl x , where x≥2. Analyses conducted with X-ray photoelectron spectra (XPS) show that their surfaces are essentially pure gold, with only traces of aluminium remaining. The electrodes show near-ideal capacitor behaviour under both cyclic voltammetry and potential-step conditions. The higher capacitance of the mesoporous electrodes leads to a better dynamic range in potential-step experiments, resulting in improved accuracy of measurement. The sensitivity of the new material as a capacitive sensor is demonstrated in a milk fouling experiment, and is improved by up to 30 times compared to the control sample of ordinary planar gold. We propose that the use of mesoporous gold electrodes offer a convenient way to sensitively and accurately amplify the capacitance signal of an electrochemical sensor.

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Design of a capacitive-sensor signal processing system with high accuracy and short conversion time

Cited by 11 publications

References 7 publications

Capacitive Sensors

Capacitive Sensors

A Variable Configuration Force Sensor With Adjustable Resolution for Robotic Applications

Mesoporous gold electrodes for sensors based on electrochemical double layer capacitance

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