To ensure the real-time simulation, the step length of the paralleldigitalcomputer must be related not only to the complexity of the object but also to the number of the bigital computers selected.
A parallel arithmetic method for performing digital filtering in parallelcomputer or vector computer system is put forward in this paper. The calculation is fast and effective.
This kind of water meter adopts touching electric brush to convert code position of digital code wheel of water meter into voltage signal which will be input to micro-computer in parallel.