Design Of Infrared/Microwave Signal Inducing And Processing Chip For Intelligent Buildings

In recent years,with the improvement of social production level and quality of living,the function of housing has changed,people's demand for housing is not just satisfied with working or living,comfort and convenience have become more and more important.Because of that,intelligent buildings and smart home have become the focus of research in the new century.As an important research hotspot among them,the intelligent equipment has been highly concerned.The focal point of intelligent equipment is automatic induction and control,which means using sensors to get inductive signals,and then controlling devices through signal processing.This thesis designs a control chip used for inducing and disposing microwave and infrare signal,which can detect and respond to external microwave and infrared signals,and then process and do logical operations on the induction signal thus generate driving signals of power tube,so as to achieve the purpose of controlling equipment automatically.This thesis puts emphasis on microwave and infrared induction signal processing circuit,digital drive signal generation circuit and delay control circuit.The frequency of received signal is very high,but the magnitude is very weak and with a lot of noise,amplification,denoising,reducing frequency,filtering and demodulation process is needed before it can be converted into digital signal;infrared signal acquisition and conversion between it and the electrical signal is also essential;in addition,the timing accuracy of the chip has a great impact on the practical application of the chip.The detection range is about 5?10m.It can get wider using range and stronger anti-interference ability when working in the 2.4GHz band,timing mode is divided into 7.5s,30s and 60s in order to meet needs of the different situation.The peripheral circuit of the chip is relatively simple,which makes it more convenient to use.The infrared signal and the microwave signal are processed at the same time can not only improve the output precision,expand applicable places of the chips,but also reduce the cost so as to meet the requirement of low cost in industrial and civil fields.The chips can meet the control requirements of some situation such as induction door and public places lighting.