Sensor head of a code reader
OwnerHeikki Huomo, Esko Strommerinventors
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Abstract
A sensor head of a code reader for reading an at least partly conductive code, which said sensor head comprises a reading electrode, whose tip is arranged to couple to the code in a capacitive manner, as well as a measuring electronics. The measuring electronics is arranged to input signal to said reading electrode as well as to measure the response of said signal from the reading electrode in order to determine a change in the impedance between the reading electrode and its surroundings. In addition, the invention relates to a corresponding method, code reader, electronic device and mobile device.
Claims13
A sensor head of a code reader reading an at least partly conductive code, which said sensor head comprises a reading electrode, whose tip is arranged to couple to the code in a capacitive manner, as well as a measuring electronics, wherein the measuring electronics is arranged to input signal to said reading electrode as well as to measure the response of said signal from the reading electrode in order to determine a change in the impedance between the reading electrode and its environment.
A method for reading an at least partly conductive code with a code reader, whose sensor head comprises at least a reading electrode, whose tip can be arranged to couple to the code in a capacitive manner, as well as a measuring electronics, wherein a signal is input to said reading electrode with the measuring electronics and the response of said signal is measured from the reading electrode in order to determine a change in the impedance between the reading electrode and its surroundings.
A code reader for reading an at least partly conductive code, which said device comprises a reading electrode, whose tip is arranged to couple to the code in a capacitive manner, as well as a measuring electronics, wherein the measuring electronics is arranged to input signal to said reading electrode as well as to measure the response of said signal from the reading electrode in order to determine a change in the impedance between the reading electrode and its surroundings.
An electronic device, which comprises a sensor head for reading an at least partly conductive code, which said sensor head comprises a reading electrode, whose tip is arranged to couple to the code in a capacitive manner, as well as a measuring electronics, wherein the measuring electronics is arranged to input signal to said reading electrode as well as to measure the response of said signal from the reading electrode in order to determine a change in the impedance between the reading electrode and its surroundings.
A mobile device, which comprises a sensor head for reading an at least partly conductive code, which said sensor head comprises a reading electrode, whose tip is arranged to couple to the code in a capacitive manner, as well as a measuring electronics, wherein the measuring electronics is arranged to input signal to said reading electrode as well as to measure the response of said signal from the reading electrode in order to determine a change in the impedance between the reading electrode and its surroundings.
Dependencies are inferred from the claim text.