Research And Development Of Intelligent High-frequency Power Line Carrier Channel Test Device

The electric wire high frequency carrier wave technology is very important and widely used in electric power industry and other fields. However the existing testing instruments for high frequency carrier wave channels are lagged and in creasing need for improving. As a result, a kind of new testing instrument for electric wire high frequency carrier wave channels is investigated and developed in this paper.The characteristics and shortcomings of the existing testing instruments are analyzed, and a new intelligentized testing instrument based on DSP technology is designed. Many of digital circuit technologies are adopted in the hardware circuit design, such as DSP technology, DDS technology, digital potentiometer technology and so on. In the software design, a digital filter is used to filter signals, and the filter's parameters are digital dynamic adjustable. The value of the input signals' frequency and voltage can be obtained after digital signal processing. The designed testing instrument has the functions of many instruments, such as frequency selective level meter, oscillator, frequency meter, millisecond meter and so on. All measuring and data processing are accomplished by the application software that is installed in a computer. At last, an intelligentized testing instrument for electric wire high frequency carrier wave channels is developed. The detecting results show that all the technical indexes are satisfied and coincide with the designed values.The testing instrument designed in this paper is a vitally important progress and of innovation. It is assessed that the testing instrument has met advanced world standards.