Tree Age Estimation Based on Resistograph Stationary Kalman Filter

[Objective] To study the application of Kalman filter in the anti-drilling resistance value sequence of the acupuncture instrument, to derive the stable Kalman filter of the acupuncture instrument to estimate the age of trees, and to provide a method and basis for the estimation of the age of standing trees. [Method] Take Shanxi Province Larix principis-rupprechtii in Yangjuangou Forest Farm was used as the research object. Acupuncture equipment was used to drill into Larix principis-rupprechtii at the same horizontal position and different directions to obtain 323 sets of drill resistance value sequence as the research sample, and 104 discs were intercepted within 5 cm of the acupuncture position. As a reference sample. The Kalman filter theory is applied to the acupuncture instrument, by analyzing the properties of the filter, simplifying the parameters, and deriving the smooth Kalman filter of the acupuncture instrument. The anti-drilling obtained by drilling into the North China larch with the acupuncture