CPLD-based delayed turning off method for electromagnet in computer horizontal loom controller
A control method and electromagnet technology, applied in the direction of computer control, program control, general control system, etc., can solve problems such as speed limitation, achieve the effect of improving running speed, reducing later maintenance costs, and preventing burnout
Inactive Publication Date: 2013-07-17
HANGZHOU DIANZI UNIV
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, to propose a method for delaying the shutdown of the electromagnet in the controller of a computerized flat loom based on CPLD, and to solve the problem of delaying the shutdown of the electromagnet in the control of the existing computerized flat loom. Disadvantages of speed limitation in break method
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[0039] The method for delaying the shutdown of the electromagnet in the CPLD-based computer flat loom controller of the present invention depends on the following hardware devices: single-chip microcomputer control circuit, custom bus buffer, CPLD control circuit, decoding circuit, photoelectric coupler circuit , Electromagnet drive circuit. The invention adopts CPLD as hardware delay, which is accurate and reliable, can effectively reduce the CPU occupancy rate of a single-chip microcomputer or ARM, and the delay time is accurate and reliable. At the same time, the delay time is controllable, and the electromagnet can be accurately turned off to prevent the electromagnet from being burned.
[0040] Such as figure 1 As shown, the microcontroller control circuit is connected to the custom bus buffer, the custom bus buffer is connected to the CPLD control circuit, an output terminal of the CPLD is connected to the input terminal of the decoding circuit, and the output terminal o...
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The invention discloses a CPLD (Complex Programmable Logic Device)-based delayed turning off method for an electromagnet in a computer horizontal loom controller. In the prior art, the delayed turning off time of the electromagnet is processed by chips, such as ARM and the like; the turning off speed is limited by the efficiency of the ARM chip and the frequency, high speed cannot be realized, and modification on turning off delayed time is affected by other tasks, so the turning off time is not accurate. In the method of the invention, a singlechip transmits the delayed turning off time of the electromagnet, after receiving the time, the CPLD compares a numerical value of an internal counter with an output end numerical value of a data storage queue, if the two numerical values are equal, the CPLD turns off the corresponding electromagnet, and simultaneously deletes the numerical value of the output end of the data storage queue. The method shortens a program modification cycle, improves the speed of delayed turning off of the electromagnet, and completely eradicates the phenomenon of burning down the electromagnet.
Description
technical field [0001] The invention relates to the field of computerized flat looms, in particular to a method for delayed shutdown of an electromagnet in a controller of a computerized flat loom, specifically a method for delayed shutdown of an electromagnet in a controller of a computerized flat loom based on CPLD . Background technique [0002] In the existing technology, the electromagnet delay shutdown method in the computer flat loom controller is usually based on a single-chip microcomputer or ARM as the core, and the algorithm is implemented by software. Excessive use of delay will limit the speed of the controller and cannot It meets the requirements of high-speed operation of computerized flat looms. Secondly, the delay of the electromagnet in the software algorithm of the single-chip microcomputer or ARM is complicated, and it is easily disturbed by other tasks. Once the electromagnet is not turned off within the specified delay, it will cause the electromagnet ...
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IPC IPC(8): G05B19/042
Inventor 黄继业高明煜黄健曾毓何志伟
Owner HANGZHOU DIANZI UNIV