US 11,774,521 B2
Position measuring mechanism and measuring method of linear motion system
Mikhail Tiapkin, Taichung (TW); Oleg Tolstykh, Taichung (TW); Sergey Volkov, Taichung (TW); Gennady Tyapkin, Taichung (TW); and Aleksandr Balkovoi, Taichung (TW)
Assigned to HIWIN MIKROSYSTEM CORP., Taichung (TW)
Filed by HIWIN MIKROSYSTEM CORP., Taichung (TW)
Filed on Jan. 20, 2021, as Appl. No. 17/153,628.
Prior Publication US 2022/0229123 A1, Jul. 21, 2022
Int. Cl. G01R 33/022 (2006.01); H02P 25/064 (2016.01); H02K 16/04 (2006.01); G01D 5/14 (2006.01); H02P 6/00 (2016.01)
CPC G01R 33/022 (2013.01) [G01D 5/145 (2013.01); H02K 16/04 (2013.01); H02P 25/064 (2016.02); H02P 6/006 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A position measuring mechanism comprising:
a base;
a moving portion capable of moving relative to the base;
at least one magnet array disposed in the moving portion;
a first sensing portion and a second sensing portion respectively disposed on the base at intervals for sensing a magnetic field of the magnet array;
a third sensing portion having a signal unit disposed on the moving portion, and a sensitive element disposed on the base for sensing the signal unit; and
a processing portion receiving sensing signals of the first sensing portion and the second sensing portion respectively, calculating a subcycle corresponding to the magnet array, and performing operation in conjunction with sensing data of the sensitive element to obtain a movement path of the moving portion, and then feeding the movement path back to a driver to adjust a movement pattern of the moving portion;
wherein the magnet array has a plurality of magnets, a minimum distance between the two magnets of a same magnetism is a magnetic period of the magnet array, and a length of the magnet array is an integral multiple of the magnetic period of the magnet array;
wherein a quantity of the magnet array is two, and the magnet arrays are arranged adjacent to each other on the moving portion, and a spacing between the two adjacent magnet arrays is at least two magnetic periods.