Infrared remote data communication device

A data communication and long-distance technology, applied in the field of data communication, can solve the problems of large duty cycle of carrier signal and difficult to achieve precise control, and achieve the effect of increasing effective power, increasing transmission distance and wide application.

Inactive Publication Date: 2006-11-01
DAHENG SCI & TECH SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide an infrared long-distance data communication device, which mainly solves the technical problem that the duty cycle of the carrier signal in the data transmission of the existing infrared data communication device is generally large, and it is difficult to achieve precise control

Method used

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Embodiment Construction

[0017] see figure 2 , an infrared long-distance data communication device, which includes an infrared transmitting module and a receiving module, and its transmitting signal is transmitted through a carrier signal after being modulated. There is a CPU in the device, and the generation of the carrier signal and the duty cycle of the carrier signal are determined by CPU direct control.

[0018] The transmitting module transmits after modulating the TXD of the asynchronous serial port at 38KHz, and the output of the receiving module directly enters the RXD of the asynchronous serial port.

[0019] This IR receiver has a filter.

[0020] This infrared receiver is a receiver with lens focus.

[0021] By adopting the transmission circuit of the present invention, the average transmission power can be reduced, the transmission distance can be increased, and the anti-pulse interference ability can be enhanced to a certain extent, which serves multiple purposes.

[0022] In summary...

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Abstract

The apparatus comprises an infrared emitting module, an infrared receiving module and a CPU; wherein, the emitting signal is emitted out through a modulation by a carrier signal; the generation and the duty ration of carrier signal is controlled by the CPU. The invention can solves the problem that is the carrier signal in existed infrared communication device has a large duty ratio so as to hardly make precise control.

Description

Technical field: [0001] The invention relates to the technical field of data communication, in particular to an infrared long-distance data communication device. Background technique: [0002] At present, infrared is mainly used in two aspects: remote control and data communication. It is a relatively new technology that has just emerged in recent years. It has the characteristics of large data transmission volume and high transmission rate. The popular IrDA is a standard for this type of technology. The infrared communication port designed according to the IrDA standard generally has a transmission rate of 2400bps-115.2kbps, and some can even reach 4Mbps, but it has a weakness that the transmission distance is relatively short, and can only reach 1m at most, which is not suitable for long-distance data transmission using infrared. Words are far from enough to meet the needs. [0003] The infrared transceiver devices on the existing market are nothing more than IrDA devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/11H04B10/50H04B10/60
Inventor 郭震海
Owner DAHENG SCI & TECH SHANGHAI
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