Capacitive Sensor Operation Part 2: System Optimization!!!

Capacitive Sensor Operation Part 2: System Optimization

June 1, 2009

By: Mark Kretschmar

Sensors

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Part 2 of this two-part article focuses on how to optimize the performance of your capacitive sensor, and to understand how target material, shape, and size will affect the sensor's response.

Last month we discussed the basics of capacitive sensing, both how the sensor works and explanations of the important terminology. Now it's time to apply this knowledge and explain how to optimize the performance of capacitive sensors.

Effects of Target Size: The target size is a primary consideration when selecting a probe for a specific application. When the sensing electric field is focused by guarding, it creates a slightly conical field that is a projection of the sensing area. The minimum target diameter is usually 130% of the diameter of the sensing area. The further the probe is from the target, the larger the minimum target size.

Range of Measurement: The range in which a probe is useful is a function of the size of the sensing area. READ MORE..............

     Segunda parte de Tutotial de Sensores Capacitivos, Versión en ingles...   Si tienes dudas o comentarios envialos a  nuestro email... Saludos!!! =)

From Carlos's Desk...
dircasa@prodigy.net.mx

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Capacitive Sensor Operation Part 1: The Basics!!

Capacitive Sensor Operation Part 1: The Basics

May 1, 2009
By: Mark Kretschmar
Sensors
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Part 1 of this two-part article reviews the concepts and theory of capacitive sensing to help to optimize capacitive sensor performance.

     Noncontact capacitive sensors measure the changes in an electrical property called capacitance. Capacitance describes how two conductive objects with a space between them respond to a voltage difference applied to them. A voltage applied to the conductors creates an electric field between them, causing positive and negative charges to collect on each object (Figure 1). If the polarity of the voltage is reversed, the charges will also reverse.     READ MORE.............

     En esta ocasión presento a uds. in link con la información técnica de los Sensores Capacitivos, Versión en Ingles.  Si tienen duadas o comentarios no duden en enviarlas.... Saludos!! =)

From Carlos's Desk...

dircas@prodigy.net.mx

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