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The principle and use of incremental encoder
2020 / 01 / 29
An encoder is a device that converts an angular displacement or a linear displacement into an electrical signal. According to the working principle, the encoder can be divided into two types: incremental (SPC) and absolute (APC). The incremental encoder converts the displacement into a periodic electrical signal, which is then converted into a counting pulse, and the number of pulses is used to represent the magnitude of the displacement. Here is some introduction to incremental encoders. 1. working principle The working principle of the photoelectric incremental encoder is as follows: the pulse code disc rotating together with the rotating shaft has a uniformly engraved grating, and a plurality of transparent sections and shading sections are evenly distributed on the code disc. Incremental encoders do not have a fixed starting zero. The output is a pulse proportional to the increment of the corner. A counter is required to count the number of pulses. Each time a light transmissive area is rotated, a pulse signal is sent, the current value of the counter is incremented by 1, and the count result corresponds to the increment of the cor
The working principle of the encoder
2020 / 01 / 22
The working principle of the encoder First, the photoelectric encoder works An optical encoder is a sensor that converts mechanical geometric displacements on an output shaft into pulses or digital quantities by photoelectric conversion. This is the head Before the most widely used sensor, the photoelectric encoder was composed of a grating disk and a photoelectric detection device. The grating disk is equally divided on a circular plate of a certain diameter Open a number of rectangular holes. Since the photoelectric encoder and the motor are coaxial, when the motor rotates, the grating disk rotates at the same speed as the motor and transmits A detection device composed of an electronic diode such as a photodiode detects and outputs a plurality of pulse signals, and a schematic diagram thereof is shown in FIG. 1; by calculating light per second The number of pulses output by the electric encoder can reflect the current motor speed. In addition, to determine the direction of rotation, the code disc can also provide phase difference 90o two-way pulse signal. According to the detection principle, encoders can be classified into optical, magnetic, inductive and capacitive. According to its calibration method and signal output form, it can be divided For the incremental, absolute and mixed three.
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