Sensor Device And Method For Capacitive Approximation Detection

摘要

A capacitive sensor device with an electrode system has a first transmitting electrode and a first reception electrode, wherein the first transmitting electrode can be brought into capacitive coupling with the first reception electrode, and a second transmitting electrode and a second reception electrode, wherein the second transmitting electrode can be brought into capacitive coupling with the second reception electrode, a signal generator for feeding the first transmitting electrode with a first electric alternating signal and the second transmitting electrode with a second electric alternating signal, and a signal processing device, which is coupled with the first reception electrode and with the second reception electrode, and which is adapted to form a first measurement variable from the difference between a first electric value tapped at the first reception electrode and a second electric value tapped at the second reception electrode

主权项

1. Capacitive sensor device with
an electrode system, comprising:
a first transmitting electrode and a first reception electrode, wherein the first transmitting electrode can be brought into capacitive coupling with the first reception electrode, anda second transmitting electrode and a second reception electrode, wherein the second transmitting electrode can be brought into capacitive coupling with the second reception electrode,a signal generator for feeding the first transmitting electrode with a first electric alternating signal and the second transmitting electrode with a second electric alternating signal, anda signal processing device, which is coupled with the first reception electrode and with the second reception electrode, and which is adapted to form a first measurement variable from the difference between a first electric value tapped at the first reception electrode and a second electric value tapped at the second reception electrode.