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The method of suppressing interference based on the extended repeater of dmx512 protocol

A DMX512, interference suppression technology, applied in transmission noise suppression, digital transmission systems, electrical components, etc., can solve the problems of high complexity of the system and communication protocol, rising cost of line materials and laying, and poor generality of the scheme. Low rollout, design and manufacturing costs, reduced operational errors

Inactive Publication Date: 2017-01-25
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

The advantage of this method is that it provides developers with flexible expansion methods and excellent comprehensive effects, but the disadvantages are also obvious: the system and communication protocols are highly complex, the development cycle is long and the program is not universally Low reusability, difficult to popularize
In addition, in terms of cost, it will bring about a substantial increase in the cost of line materials and laying, and the need to purchase supporting equipment.

Method used

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  • The method of suppressing interference based on the extended repeater of dmx512 protocol

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Embodiment

[0025] As shown in the figure, a repeater based on the DMX512 protocol expansion includes: a master control single-chip microcomputer and a level conversion and isolation circuit; the receiving end and the sending end of the master control single-chip communication interface are respectively level converted and isolated Access to the DMX network.

[0026] The repeater uses the Mcrochip PIC24 series single-chip microcomputer for protocol conversion and other processing. According to the basic requirements of the DMX512-A protocol, the level conversion and isolation circuit uses SP485 for level conversion, and uses 6N137 and an isolated DC / DC converter Isolate communication lines and power supplies. The invention uses a PIC24 low-cost 16-bit RISC microcontroller designed and produced by MicroChip. This MCU adopts an improved Harvard architecture with 32KB Flash and 4KBRAM memory. It can reach a maximum operating speed of 16MIPS when the system clock is 32MHz. It has abundant perip...

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Abstract

The invention relates to a repeater based on DMX512 protocol extension and an interference restraining method and discloses the repeater based on the DMX512 protocol extension. The relay comprises a main control single chip microcomputer and a level switching and isolation circuit. The receiving end and the transmitting end of a single chip microcomputer communication interface are connected into a DMX512 network after level switching and isolation. The phenomenon that the system loses control information under pulse interference can be greatly reduced. Meanwhile, the DMX512 protocol extension is simple, and the communication protocol complexity is not increased obviously.

Description

Technical field [0001] The invention relates to a repeater and a method for suppressing interference, in particular to a repeater based on DMX512 protocol extension and a method for suppressing interference. Background technique [0002] The DMX512 communication protocol is a general control protocol for digital entertainment lighting equipment, which is widely used in the entertainment lighting industry. Because of its simple, practical and efficient characteristics, this communication protocol has been used in various stage lighting equipment including computer lights, dimming controllers, consoles, color changers, electric booms and other stage lighting equipment. Wide range of applications. However, the frame structure of the DMX512 communication protocol lacks verification means, and the data can only be sent from the master to all slaves in one direction. The slaves cannot recognize the errors generated during the communication process, and cannot feedback the error status...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L1/00H04B15/00
Inventor 朱学莉朱树先郭胜辉
Owner SUZHOU UNIV OF SCI & TECH