Near-surface object sensing device and sensing method

摘要

Disclosed is a near-surface object sensing device, including a printed circuit board, a plurality of magnetic sensors arrayed on the printed circuit board to sense the magnetic field of an external magnetic object and generate a magnetic sensing signal, a multiplexer connected to the magnetic sensors for selecting and outputting the magnetic sensing signal, and a microprocessor connected to the multiplexer for receiving the magnetic sensing signal, wherein the microprocessor includes a sampling algorithm module for converting the magnetic sensing signal into a magnetic field distribution image, and a six-dimensional coordinate-calculating module for calculating six-dimensional coordinates of the external magnetic object. The sensing device of the invention is compact, low energy consuming and can accurately provide users with a convenient and intuitive user interface with three dimensional locations and position information in a near-surface space.

主权项

1. A near-surface object sensing device, comprising
a printed circuit board; a plurality of magnetic sensors arrayed on the printed circuit board to sense magnetic field of an external magnetic object and generate a plurality of magnetic sensing signals; a multiplexer electrically connected to the magnetic sensors for selecting at least one of the magnetic sensing signals to be output; and a microprocessor electrically connected to the multiplexer for receiving the at least one of magnetic sensing signals, wherein the microprocessor comprises:
a sampling algorithm module for converting the at least one of magnetic sensing signals into a magnetic field distribution image having north-polarity parts and south-polarity parts, anda six-dimensional coordinates-calculating module for calculating six-dimensional coordinates of the external magnetic object.