Patent ID: 9593965
Date: 2017-03-14
CPC Classifications: G01D

Claim:
1. A non-contact adjustable hysteretic magnetic encoder, comprising: a bipolar magnetic block disposed at a rotating shaft; two magnetic sensing components configured in a manner to generate two induction signals by sensing a magnetic field of the bipolar magnetic block, wherein the two induction signals differ from each other by a first predetermined phase; a storage for storing a rotation angle table of rotation angles corresponding to the two induction signals and storing a first phase signal code table and a second phase signal code table indicative of states corresponding to a first phase signal and a second phase signal at each said rotation angle; and a controller connected to the two magnetic sensing components and the storage so as to receive the two induction signals, retrieve a rotation angle of the rotating shaft in accordance with the rotation angle table, look up the first phase signal code table and the second phase signal code table for digital logical values corresponding to the first phase signal and the second phase signal in accordance with the rotation angle, and output the digital logical values, wherein the first phase signal code table requires the controller to output a first digital logical value if a code of the first phase signal is in a first state, a second digital logical value if the code of the first phase signal is in a second state, and a digital logical value corresponding to the preceding code if the code of the first phase signal is in a third or fourth state, wherein the second phase signal code table requires the controller to output a first digital logical value if a code of the second phase signal is in a first state, a second digital logical value if the code of the second phase signal is in a second state, and a digital logical value corresponding to the preceding code if the code of the second phase signal is in a third or fourth state.