One kind of method and apparatus for veneer HPD

One kind of veneer HPD method and apparatus of the present invention is compared with a preset threshold duration detected by the duration of the board after the state change information bit, and the bit information is changed in accordance with the comparison result and snowboard state, determining the detection result of the board plug, the plug board on the valid and invalid operations were clearly distinguished, good to avoid misjudgment of the board HPD and false negatives, and the main control unit reduces the processing the burden is.