Transportation Vehicle System and Charging Method for the Transportation Vehicle System

Abstract

A magnetic sensor array including a plurality of magnetic sensors detects a phase regarding a magnetic pole of a magnetic pole array including magnetic poles of N and S arranged alternately. A pitch identification unit detects a pitch number of the magnetic pole currently being detected by the magnetic sensor array, in the magnetic pole array.

1 . A magnetic pole detection system comprising:
 a magnetic pole array including a plurality of magnetic poles of N and S arranged alternately;   a magnetic sensor array including a plurality of magnetic sensors for detecting a magnetic pole of the magnetic pole array;   a phase detection head for detecting a phase regarding one magnetic pole currently being detected by the magnetic sensor array in the magnetic pole array according to a signal from the magnetic sensor array; and   a pitch identification unit for identifying a pitch number of the magnetic pole currently being detected in the magnetic pole array, based only on current detection data regardless of historical detection data.   
     
     
         2 . The magnetic pole detection system according to  claim 1 , further comprising:
 a plurality of marks arranged in parallel with the magnetic pole array, changing synchronously with the magnetic poles of the magnetic pole array; and   a mark sensor array including a plurality of mark detection sensors provided in parallel with the magnetic sensor array,   the pitch detection unit identifying the pitch number of the magnet pole in the magnet pole array based on a combination of signals from the mark detection sensors.   
     
     
         3 . The magnetic pole detection system according to  claim 2 , the marks each being configured at least by the magnetic poles of the magnet array extended in a first direction perpendicular to a second direction in which the magnet poles of the magnet array are arranged and magnetic poles of the magnet array un-extended in the first direction. 
     
     
         4 . The magnetic pole detection system according to  claim 2 , further comprising an offset correction unit for converting data regarding the pitch number of the magnetic pole in the magnetic pole array into a reference position of each magnetic pole, and converting the phase into a shift from the reference position to output an absolute position. 
     
     
         5 . A method of detecting a magnetic pole of a magnetic pole array comprising magnetic poles of N and S arranged alternately with a magnetic sensor array including a plurality of magnetic sensors, the method comprising the steps of:
 detecting a phase regarding one magnetic pole currently being detected by the magnetic sensor array in the magnetic pole array by a phase detection head; and   identifying a pitch number of the magnetic pole currently being detected in the magnetic pole array, by a pitch identification unit, based only on current detection data regardless of historical detection data.   
     
     
         6 . The method according to  claim 5 , a plurality of marks being arranged in parallel with the magnetic pole array, the marks changing synchronously with the magnetic poles of the magnetic pole array, a mark sensor array including a plurality of mark detection sensors being provided in parallel with the magnetic sensor array,
 the identifying step including identifying the pitch number of the magnetic pole in the magnetic pole array based on a combination of signals from the mark detection sensors.