Leakage protection device based on smart home

With the development of science and technology and the improvement of living standards, the concept of smart home system has begun to move towards the masses, and home intelligence will definitely be a hot topic in the field of automatic control for a long time to come. Due to its broad application prospects and potential huge market demand, market competition is slowly taking shape, which has promoted the further development of smart homes, but the safety of smart homes is the primary consideration, and the leakage of electrical appliances has always been a smart home Security risks. Based on the above considerations about the security deficiencies of smart homes, this subject aims to study and design a smart home leakage protection device, the core processor is based on Msp430, design the smallest system, complete the design of each sub-function module, for the hardware we Adopt zero-sequence current transformer, instrumentation amplification, active second-order filtering, reverse addition circuit, etc., try to convert the external signal into an analog quantity that can enter the single-chip microcomputer for control. For the software, we choose Msp430 single-chip microcomputer. Use Msp430 one-chip computer to carry on processing after A/D conversion. Through 12864 real-time display, when the residual current exceeds the parameters set within the Msp430 MCU, it will immediately perform actions to cut off the external circuit.