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Method for controlling infrared learning

An infrared learning and control method technology, applied in the field of infrared remote control, can solve the problems of poor learning ability of projectors, unfixed carrier frequency, unfixed position of synchronization code and frame interval code, etc., and achieve good accuracy and wide frequency range , The effect of high signal accuracy

Inactive Publication Date: 2009-12-23
SHANGHAI CHUANGJIAN ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the positions where the synchronization code and the frame interval code appear are not fixed
For these flexible and changeable pattern formats, it is difficult to distinguish the meaning of various pulse streams
[0004] (2) The carrier frequency is not fixed: commonly used remote controllers use 38KHz as the carrier frequency, and some use 36KHz-42KHz
[0007] Due to the above problems, the commonly used infrared learning is generally developed and researched for a certain category of products such as TVs, and compared with other electrical products such as air conditioners and projectors, the learning ability is poor.

Method used

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  • Method for controlling infrared learning
  • Method for controlling infrared learning
  • Method for controlling infrared learning

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0019] The present invention is realized through the following steps:

[0020] 1. Use TFDU4100 infrared data transmission module as the collection of infrared signals;

[0021] 2. After 74LS14 shaping, the external interrupt 0 pin of ATMEGA8515 receives the signal;

[0022] 3. Measure and calculate the period of the infrared carrier wave and the time of the actual high and low levels after demodulation through the timers T0 and T1.

[0023] The circuit of the hardware part (wherein the hardware part is a part of the prior art) of the present invention is as figure 1 , figure 2 As shown, the infrared receiving part uses the TFDU4100 data transmission module, which can reach a maximum data transmission rate of 115.2Kbps, which is enough to meet the detection requirements of the carrier frequency (36KHz ~ 42KHz) of general infrared remote contr...

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Abstract

The invention relates to a method for controlling infrared learning, which is achieved by the following steps: using a TFDU4100 infrared data transmission module to acquire infrared signals; after 74LS14 shaping, using ATMEGA8515 external interrupt 0 pin to receive signals; and using timers T0 and T1 to measure and calculate out the period of infrared carriers and the time of actual high-low level after demodulation. The method has the advantages that the frequency range width of infrared carrier signals can be recognized, the learned signal precision is high, and the accuracy is good.

Description

technical field [0001] The invention relates to an infrared remote control, in particular to a control method for infrared learning. Background technique [0002] In the prior art, there is no uniform standard for the infrared remote control encoding method and code stream of various electrical appliance manufacturers, and the main differences are: [0003] (1) Various code types: the pulse stream generally includes: frame header, system code, operation code, synchronization code, frame interval code, and frame tail. Moreover, the positions where the synchronization code and the frame interval code appear are not fixed. With these flexible pattern formats, it is difficult to distinguish the meaning of the various pulse streams. [0004] (2) The carrier frequency is not fixed: commonly used remote controllers use 38KHz as the carrier frequency, and some use 36KHz-42KHz. [0005] (3) The codes are of different lengths: color TV products generally only have dozens of charact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08C23/04
Inventor 吴小龙
Owner SHANGHAI CHUANGJIAN ELECTRONICS
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