在欧洲木材的强度是根据EN-338标准来确定的.我们的产品是根据这个标准设计的;根据木材的弹性模量(MOE)和平均密度来分级.

系统配置:

-----秤,

-----麦克风

-----电脑

-----分级分析软件

-----泡沫支撑件

-----小锤

-----手提箱

MOE=密度*应力波速度的平方.

分级程序非常简单:

将尺寸,节疤的直径和湿度差输入到设置窗口,操作人员用小锤子敲击木头,评价时间需要1秒.

技术参数:

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

麦克风:

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

木材重量的:0.1-3%

电脑要求:

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