App Note: Capacitive Proximity Sensor, Theory and Operation

This application note contains explanation about foreground suppression, switching range, voltage, switching frequency, echo, ultrasonic sensors, computer program, sensing distance, switching, operating range, operation, and load. Inside the application note you can learn info related to sonar sensors, mutual interference, dielectric, ultrasonic, blind zone, sensing range, sensors, analog version, sound velocity, transmitter, and proximity sensor.

Many info related to rated sensing distance, capacitive proximity sensor, sonar, angular alignment, proximity sensor family, pulses, signal evaluator, transducer, modular range, sound, sensing, and ultrasonic sensor are described inside the application note. Here are some excerpt from this application note:

The sensing surface of a capacitive sensor is formed by two concentrically shaped metal electrodes of an unwound capacitor. When an object nears the sensing surface it enters the electrostatic field of the electrodes and changes the capacitance in an oscillator circuit. As a result, the oscillator begins oscillating. The trigger circuit reads the oscillator’s amplitude and when it reaches a specific level the output state of the sensor changes. As the target moves away from the sensor the oscillator’s amplitude decreases, switching the sensor output back to its original state.

Giving more content, the application note tells the reader information around proximity, range, sensor, sensing surface, capacitive, dielectric constant, proximity sensors, capacitive sensor, distance, receiver, and ultrasonic proximity sensor.

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