Antenna layout and coordinate positioning method for electromagnetic-induction systems

An antenna layout method for electromagnetic-induction systems, said antenna layout method comprising:

• providing a plurality of antenna loops;
• using said plurality of antenna loops to form a plurality of antenna circuitries, wherein each of said plurality of antenna circuitries comprises four antenna loops;
• using said plurality of antenna circuitries to form a plurality of antenna groups in different directions, wherein each of said plurality of antenna groups in different directions comprises one antenna loop;
• and
• placing said plurality of antenna groups of different directions into an antenna sub-circuitry of said electromagnetic-induction system in an equal spacing manner for forming said antenna layout of said electromagnetic-induction system.

A five-stage coordinate positioning method of electromagnetic-induction systems, said five-stage coordinate positioning method comprising:

• carrying out a first universal scanning procedure for scanning an universal antenna group of having a first coordinate direction, and obtaining a first largest voltage amplitude of each antenna signal accordingly;
• using a micro-processing sub-circuitry to carry out a first comparative procedure for comparing said first largest voltage amplitude to a standard minimum signal recognition value, and confirming a first antenna position of having said first largest voltage amplitude greater than said standard minimum signal recognition value;
• using said first antenna position as a first scanning basis to proceed a mid-terrain confirmation scanning procedure for scanning said antenna group having said first coordinate direction in a half region, thus obtaining a plurality of second largest voltage amplitudes within said half region;
• using said micro-processing sub-circuitry to carry out a second comparative procedure for comparing said second largest voltage amplitudes to said standard minimum signal recognition value, and reconfirming a second antenna position of having said second largest voltage amplitude greater than said standard minimum signal recognition value;
• using said second antenna position as a second scanning basis to proceed a first partial confirmation scanning procedure for scanning said antenna group having said first coordinate direction in a first partial region, thus obtaining a plurality of third largest voltage amplitudes within said first partial region;
• carrying out a second universal scanning procedure for scanning an universal antenna group of having a second coordinate direction, and obtaining a fourth largest voltage amplitude of each antenna signal accordingly;
• using said micro-processing sub-circuitry to carry out a third comparative procedure for comparing among said fourth largest voltage amplitudes, and obtaining a third antenna position of having the largest voltage amplitude;
• using said third antenna position as a second scanning basis to proceed a second partial confirmation scanning procedure for scanning said antenna group having said second coordinate direction in a second partial region, thus obtaining a plurality of fifth largest voltage amplitudes within said second partial region;
• using said second antenna position and said plurality of third largest voltage amplitudes to proceed a first coordinate positioning procedure for obtaining a first coordinate value of said first coordinate direction;
• and
• using said third antenna position and said plurality of fifth largest voltage amplitudes to proceed a second coordinate positioning procedure for obtaining a second coordinate value of said second coordinate direction.

A five-stage coordinate positioning method of electromagnetic-induction systems, said five-stage coordinate positioning method comprising:

• providing a 4-4 distribution antenna layout, said 4-4 distribution antenna layout comprising a x-axis antenna group and a y-axis antenna group;
• carrying out a x-axis universal scanning procedure for scanning a plurality of antenna loops within said x-axis antenna group on a time-division basis, and obtaining a plurality of first voltage amplitude;
• using a micro-processing sub-circuitry to carry out a first comparative procedure for comparing each of said first voltage amplitude to a standard minimum signal recognition value, thus obtaining a first antenna position of having a first largest voltage amplitude greater than said standard minimum signal recognition value;
• using said first antenna position as the center of scanning to proceed a x-axis mid-terrain confirmation scanning procedure for scanning a half of said antenna loops within said x-axis antenna group, and obtaining a plurality of second voltage amplitudes;
• using said micro-processing sub-circuitry to carry out a second comparative procedure for comparing each of said second voltage amplitudes to said standard minimum signal recognition value, thus obtaining a second antenna position of having a second largest voltage amplitude greater than said standard minimum signal recognition value;
• using said second antenna position as the center of scanning to proceed a x-axis partial confirmation scanning procedure for scanning said second antenna position and four other antennas neighboring said second antenna position, thus obtaining five third voltage amplitudes and the relative antenna positions;
• carrying out a y-axis universal scanning procedure for scanning another plurality of antenna loops within said y-axis antenna group on a time-division basis, and obtaining a plurality of fourth voltage amplitude;
• using said micro-processing sub-circuitry to carry out a third comparative procedure for comparing among said fourth voltage amplitudes, thus obtaining a third antenna position of having a fourth largest voltage amplitude;
• using said third antenna position as the center of scanning to proceed a y-axis partial confirmation scanning procedure for scanning said third antenna position and four other antennas neighboring said third antenna position, thus obtaining five fifth voltage amplitudes and the relative antenna positions;
• using said second antenna position and said five third voltage amplitudes to proceed a fourth comparative procedure for obtaining first, second and third largest values of said five third voltage amplitudes, and a fourth antenna position of the largest value accordingly;
• using the first, second and third largest values of said five third voltage amplitudes to proceed a first calculation procedure for obtaining a x-axis relative coordinate value;
• using said fourth antenna position to proceed a second calculation procedure for obtaining a x-axis fundamental coordinate value;
• using said x-axis relative coordinate value and said x-axis fundamental coordinate value to proceed a third calculation procedure for obtaining a x-axis absolute coordinate value;
• using said second antenna position and said five fifth voltage amplitudes to proceed a fifth comparative procedure for obtaining first, second and third largest values of said five fifth voltage amplitudes, and a fifth antenna position of the largest value of said five fifth voltage amplitudes accordingly;
• using the first, second and third largest values of said five fifth voltage amplitudes to proceed a fourth calculation procedure for obtaining a y-axis relative coordinate value;
• using said fourth antenna position to proceed a fifth calculation procedure for obtaining a y-axis fundamental coordinate value;
• and
• using said y-axis relative coordinate value and said y-axis fundamental coordinate value to proceed a sixth calculation procedure for obtaining a y-axis absolute coordinate value.