The invention discloses a
rotating disc type sensing element with a plurality of unevenly distributed
magnet blocks, belongs to the technical field of providing signals through magnetic induction, and in particular relates to the technology of providing a
control signal through multi-point position magnetic induction on a rotating part. A plurality of permanent magnets distributed annularly are fixedly arranged on a
rotating disc, and the spacings between the plurality of permanent magnets are different; the adjacent permanent magnets are opposite in
magnetic polarity on one surface of the
rotating disc; in other words, the distribution manner of the magnetic polarities of all permanent magnets on one surface of the rotating disc are pole N, pole S, pole N...; and a hall is arranged in a position in the vicinity of the permanent magnets. The rotating disc type sensing element with the plurality of unevenly distributed
magnet blocks has the following advantages that with the opposite N-
S distribution manner of the magnetic polarities of the adjacent permanent magnets, the hall is capable of obtaining a rectangular wave
signal, thereby facilitating digital
processing of the
signal; and as the spacings between the plurality of permanent magnets are different, the rectangular wave
signal is capable of indicating the positions of the permanent magnets on the rotating disc; and therefore, the uses of different rectangular
waves are determined.