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在歐洲木材的強(qiáng)度是根據(jù)EN-338標(biāo)準(zhǔn)來確定的.我們的產(chǎn)品是根據(jù)這個標(biāo)準(zhǔn)設(shè)計的;根據(jù)木材的彈性模量(MOE)和平均密度來分級.

系統(tǒng)配置:

-----秤,

-----麥克風(fēng)

-----電腦

-----分級分析軟件

-----泡沫支撐件

-----小錘

-----手提箱

MOE=密度*應(yīng)力波速度的平方.

分級程序非常簡單:

將尺寸,節(jié)疤的直徑和濕度差輸入到設(shè)置窗口,操作人員用小錘子敲擊木頭,評價時間需要1秒.

技術(shù)參數(shù):

秤:dimensions, 300*150*90 mm
    capacity: 25 kg
    resolution: 1g, histeresis max. 9g
    output: RS232 signal
    powered by 220 V AC

麥克風(fēng):

unidirectional
    sensitivity: -57 dB (0dB = 1V/mbar at 1000 Hz)
    frequency range: 100-15000 Hz
    operational temperature 5 - 40 Co
小錘重量:

木材重量的:0.1-3%

電腦要求:

mass and MOE determination,
    grading table identical to EN-338 norm
    grading time is about 1 second
    Grading software is a windows based software
    The PC or lap-top is not a part of the Portable Lumber Grader package
    The requirements for the PC or laptop

    - operation system: Windows 95/98/ME/2000
    - processor speed: 100 MHz, (higher speed results quicker grading)
    - monitor resolution: min. 600*800 pixel
    - 16 bit (or higher) sound card installed properly,
      better resolution doesn't effects the grading process
    - free RS-232 serial port  (if you have only USB port a converter is necessary)
    - 1 Mbytes free space on your hard disk