The Gray code bus position detection unit comprises an address transmitting unit, an antenna box, an address detection unit, a Gray code bus and an installation accessory.
Gray code feature
Gray code belongs to reliability coding, which is a coding method with minimum error. Because, although the natural binary code can be directly converted into analog signal by digital-to-analog converter, in some cases, such as when the binary code is converted from decimal 3 to decimal 4, every bit will change, which can make the digital circuit produce a large peak current pulse. Gray code does not have this shortcoming. When switching between adjacent bits, only one bit changes. It greatly reduces the logical confusion from one state to the next.
Because there is only one bit difference between two adjacent code groups of this code, in the conversion from directional angular displacement to digital quantity, when the directional angular displacement changes slightly, which may cause the digital quantity to change, Gray code only changes one bit, which is more reliable than other codes that change two or more bits at the same time, and can reduce the possibility of errors.