Six-sensor style encoder
A sensor and encoder technology, which is applied in the field of photoelectric sensing, can solve the problems of low precision, high processing cost, and poor anti-interference of the encoder, and achieve high-precision measurement and achieve the effect of measurement
Inactive Publication Date: 2008-02-27
威海华东电源有限公司
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Problems solved by technology
[0008] In order to overcome the technical deficiencies of existing encoders such as poor anti-interference, low precision, high processing cost, and limited scope of application, the present invention provides a six-sensor encoder, which utilizes magnetic sensitive elements fixed on the circumference of the stator to sense and fix The change of magnetic field intensity caused by the rotation of the magnet on the shaft outputs voltage signals with different phase changes, and the voltage value is used to judge the rotation angle of the shaft. This type of sensor can realize high-precision measurement of rotation speed and absolute position
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[0016] In Fig. 1, six magnetic sensors are equidistantly arranged on the same circle at the quadrant position, the angle between two adjacent sensors is 60°, and the two magnetic sensors 211, 214 on the same diameter direction The output signals A1 and A2 of A1 are connected to the differential amplifier 1, the output signals B1 and B2 of the two magnetic sensors 213 and 216 in the same diameter direction are connected to the differential amplifier 2, and the two magnetic sensors 212 and 215 in the same diameter direction The output signals C1 and C2 are connected to the differential amplifier 3, and the three output signals A0, B0 and C0 of the three differential amplifiers 1, 2 and 3 are respectively connected to the input terminals of the three AD converters 4, 5 and 6, and the three The three output signals Ad, Bd, and Cd of the AD converters 4, 5, and 6 are respectively connected to one input terminal of the three multipliers 7, 8, and 9, and the three output signals of th...
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This invention relates to the photoelectric technology characterizing that six magnetic sensors are set uniformly spaced on a same circumference at the quadrant position, the output signals of two sensors on a same diameter are connected with an amplifier separately, the output signals of the three amplifiers are connected with an AD converter connected with a multiplier, the output signal of a factor corrector is connected with the other input of the multiplier, the output signal of which is connected with the input of a synthesizer, the output signal of which is taken as the input of the first and second storages, the other output signals of the synthesizer and the second storage are connected with the input of the factor corrector, the output signal of first storage is connected with an angle converter.
Description
Technical field [0001] The invention belongs to the technical field of photoelectric sensing, in particular to a magnetic encoding circuit capable of measuring the rotation angle of a shaft. Background technique [0002] Rotary photoelectric encoder is a speed and displacement sensor integrating optical, mechanical and electrical technologies. When the encoder shaft drives the code disc to rotate, the light emitted by the light-emitting element passes through the open and dark areas of the code disc (or circular grating and indicating grating), and is divided into intermittent light and received by the receiving element to generate an initial signal. After the signal is processed by the subsequent circuit, a pulse signal is output. [0003] Photoelectric encoders have experienced a development process from incremental to absolute. [0004] When the shaft of the incremental encoder rotates, it drives the grating disk to rotate. The light emitted by the light-emitting elemen...
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IPC IPC(8): G01D5/347
Inventor 郝双晖郝明晖
Owner 威海华东电源有限公司