| 摘要 |
FIELD: testing equipment.SUBSTANCE: invention relates to the method of ultrasonic testing of technical wood in the form of chucks, for instance, special logs in the form of resonant chucks, and may be used in certification of wood under conditions of lumbering, forestry and wood processing with control of chucks quality under different conditions of their storage, and also in engineering ecology during assessment of ecological quality of area by values of ultrasonic speed of wood in chucks logged in this area. The method includes storage of technical wood in the form of chucks with natural drying in stacks until stable moisture content is achieved, application of radial lines with marks onto ends of the chuck, installation of sensors of an ultrasonic device relative to marks at the ends, measurement of ultrasonic parameters of wood along the chuck at the marks. Directly in the stack at the ends of the tested chuck in addition to radial lines with marks they apply two lines in the form of concentric circumferences that mark near-core, ripe-wood and sapwood zones. Sensors of the ultrasonic device are installed relative to approximately symmetric marks at the ends of the chuck. After measurements they identify laws in change of ultrasonic parameters of wood along the chuck.EFFECT: method provides for simplification of the process and reduced labour intensiveness of an ultrasonic test and certification of technical wood in the form of chucks and short special logs in a stack, and also expansion of functional capabilities of the ultrasonic testing method on sapwood and ripe-wood zones of cross section of round timber.5 cl, 3 dwg, 3 tbl, 1 ex |
