MOISTURE SENSOR FOR WOODEN MATERIAL AND AUTOMATIC MOISTURE CONTENT MEASURING DEVICE

摘要

A high-frequency capacitive moisture sensor comprises a first electrode in the form of a circular column adapted to rotate about an axis of rotation and having its diameter increasing gradually toward the center, and a second electrode provided opposed to the first electrode with a distance. An object to be measured is moved in contact with the first electrode for continuous measurement. In the case of a columnar object, the first electrodes of at least two moisture sensors are brought into contact with different sides of the object to continuously perform measurement so that a moisture content is found from measurements for the same cross section of the columnar object. At least one moisture sensor is disposed on the same plane of a relatively thin object, such as a cut stock for laminated lumber, sawing lumber products and the like.