220v power line broadband high frequency signal injection equipment

Abstract

The invention relates to a broadband high-frequency signal injection device on a 220V power line, and belongs to the field of electronic information. The device is characterized in that a keyboard, a signal display screen LCD (Liquid Crystal Display), an ATMEGA 1280 processor, an AD9850 signal generator, a 400K-20M broadband signal amplifier and a 220V power filter module are integrated on an Arduino Mega development board, wherein the ATMEGA 1280 processor, as a central controller of the injection device, receives a frequency numeric value input via the keyboard by a user, and transmits the frequency numeric value to the display screen LCD for display, and the ATMEGA 1280 processor converts the input frequency numerical value into an output frequency control word for transmission to the AD9850 signal generator; the AD9850 signal generator performs digital-analog conversion according to the output frequency control word and outputs a high frequency sinusoidal signal with a frequency range of 400K -20M Hz, and outputs the high frequency sinusoidal signal to the 400K-20M Hz broadband signal amplifier; and the 400K-20M Hz broadband signal amplifier is connected with the AD9850 signal generator, and the 220V power filter module is connected with the 400K-20M Hz broadband signal amplifier. By using the broadband high-frequency signal injection device on the 220V power line provided by the invention, during working, the user can input any signal with the frequency range of 400k-20M Hz as required, thus realizing amplification and gain control of the signal.

Description

technical field [0001] The invention belongs to the field of electronic information, and specifically relates to a device for injecting 400K-20M HZ broadband high-frequency signals into a 220V power line. Background technique [0002] Some of the existing wireless indoor positioning technologies require precise synchronization between the base station and the sensing node; some technologies require the sensing node to carry expensive receiving / sending equipment; Wi-Fi, GSM and other wireless positioning technologies need to be installed and configured before use. , higher requirements on terminal equipment. The above factors restrict the promotion of wireless indoor positioning technology. Aiming at the fact that the power cord is an indispensable infrastructure in the home environment, Professor Abowd from the Georgia Institute of Technology has studied indoor positioning technology based on power cords and location fingerprints since 2008. Indoor positioning technology b...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of 220V / 50Hz strong electric signal, fast signal attenuation and many interference signals on the power line, the present invention provides a 400K-20M Hz broadband signal injection device on the 220V power line

Images