The antenna part, the transmitting part and the receiving part in the signal transmission of the radar system are studied and designed in detail. In order to achieve antenna polarization and target high resolution, the antenna array and simulation are designed in detail. In the transmitting design part, the PLL+VCO scheme is adopted and the advantages of the solid-state transmitter are analyzed. According to the existing domestic research, the receiving and processing part is studied in detail, and the signal transmission of the radar system is realized.
In order to solve traffic accidents and traffic congestion, an electromagnetic radar system suitable for smart cities is designed. The key of electromagnetic radar is to realize the radiation and collection of ultra-wideband step-frequency continuous wave signal. The time-division transmitter generates an ultra-wideband step-frequency continuous wave signal, which enters into multiple transmitting antennas to radiate in time-division through the switch control signal, and provides local oscillator signals for the multi-channel receiver at the same time. Signal processing is carried out according to the radar algorithm, and the processing results are input into the display control system for display.
KEYWORDS: Light sources and illumination, Control systems, Control systems design, Intelligence systems, Image processing, Cameras, Switches, Automatic control, Signal processing, Light
Energy is an important component of a country's economic development, and power resources are also an indispensable energy in people's production and life. There is also a large amount of energy waste caused by low lighting management efficiency in universities. This paper has designed a new intelligent light control system based on IPV6 network, using the network camera installed in the classroom to transfer the classroom image to the server through the IPV6 network. Through image processing, the data in the classroom is obtained and sent to the light control module to control the switch of the classroom light, supplemented by the manual control module, clock control module and photosensitive module, etc., and finally realize the intelligent management of the classroom lighting. Through the test of the intelligent light control system based on IPv6 network, the system has high sensitivity to moving images. For classrooms with different lighting conditions, large changes in pedestrian density and large randomness of use time, the control of the system can achieve accurate regulation. The whole system has low cost and high reliability. It is very suitable for classroom lighting control in teaching units and has good application value.
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