A Speed Acquisition Method Based on Photoelectric Pulse Coder
A photoelectric pulse and encoder technology, which is applied to devices using optical methods, etc., can solve problems such as reducing the accuracy of speed measurement, and achieve the effects of fast dynamic response speed and short speed refresh time.
Inactive Publication Date: 2017-11-10
SHANGHAI UNIV +1
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0008] The M / T speed measurement method described above has limitations in practical applications. When measuring the motor speed, the sampling time should be increased , can improve the response speed, and at the same time reduce the speed measurement accuracy; reduce the sampling time , can improve the speed measurement accuracy and reduce the response speed at the same time, so the M / T speed measurement method is used to measure the motor speed, and there is a contradiction between the measurement accuracy and the response speed
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0034] Below in conjunction with accompanying drawing, a preferred embodiment of the present invention is described in detail: figure 1 It is a schematic structural diagram of the speed acquisition system based on the photoelectric pulse encoder applied in this embodiment. The system consists of DSP controller (1), motor (2), photoelectric pulse encoder (3), FPGA controller (4), and PC (5). The DSP controller (1) is connected to the motor (2), and the DSP controller (1) controls the speed of the motor (2). The photoelectric pulse encoder (3) is coaxially connected with the motor (2), and the photoelectric pulse encoder (3) rotates synchronously with the motor (2). The FPGA controller (4) is connected to the photoelectric pulse encoder (3), and the pulse edge of the signal A and signal B sent by the photoelectric pulse encoder (3) triggers the high-frequency clock pulse timer in the FPGA controller for timing. The timing time of the frequency clock pulse timer has not reached...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a speed acquisition method based on a photoelectric pulse encoder. The method comprises the steps that (1) the sampling periodic time of an M / T speed measurement method is equally divided into N parts and marked as, the calculation formula (please see the formula in the specification) is provided, wherein N is the equally-divided number of the sampling periodic time in the M / T speed measurement method; (2) the equally-divided sampling periodic time is ordered in sequence and marked as ; (3) the pulse number of the photoelectric pulse encoder and the pulse number of a high frequency clock are recorded in the ordered sampling periodic time; (4) in each ordered sampling periodic time, summation is each performed on the pulse number of the photoelectric pulse encoder in the first N sampling periodic time and the pulse number of the high frequency clock in the first N sampling periodic time; (5) speed is calculated by the pulse number of the photoelectric pulse encoder in the first N sampling periodic time and the pulse number of the high frequency clock in the first N sampling periodic time. According to the speed acquisition method, not only can the speed measurement accuracy of the M / T speed measurement method be maintained, but also the dynamic response speed can be improved and the dynamic measurement error can be reduced, and the accuracy of motor speed measurement is improved.
Description
technical field [0001] The invention relates to a speed acquisition method, in particular to a speed acquisition method applied to a servo system based on a photoelectric pulse encoder. Background technique [0002] The measurement of position and speed signals is the key technology of the servo system, and the measurement quality of the signal determines the performance of the servo system. [0003] The motor speed is obtained indirectly by detecting the output pulse number of the photoelectric pulse encoder coaxially connected with the motor. According to the detected pulse frequency and pulse timing of the photoelectric pulse encoder, the motor speed is calculated and the direction of motor rotation is judged. [0004] The main methods to realize the measurement of motor speed are: period measurement method (T method), frequency measurement method (M method), frequency period self-adaptive method (M / T method). [0005] Using the T method to measure the motor speed is to ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/36
Inventor 王爽李伟伟黄苏融张琪李光耀朱文举
Owner SHANGHAI UNIV