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新闻详情
微耕机的噪声测定及数据处理
时间:2012-12-05 来源:本站 作者:管理员

 依据国标的测定位置和方法,进行静态环境噪声和驾驶员位置处噪声的自动测定。将检测数据传送到计算机中,进行自动处理和分析。

 JB/T10266.2-2001微型耕耘机试验方法中规定的噪声测定方法有两种:一是有静态环境噪声测定;二是驾驶员操作位置处噪声测定。
 
静态环境噪声测定:被试微耕机停放在测试场地中心,声级计传声器置于微耕机驱动轴延长线上,距离被试微耕机纵向中心垂直面7.5m,离地高1.2m处,“A”计权网络和“快”档进行测量。被试微耕机处于空档状态,发动机预热达到正常工作温度后,在调速器所限定的最高转速下运转,记录此时的声级计的最大读数;
 
驾驶员操作位置处噪声测定:用声级计的“A”计权网络和“慢”档进行测量,将声级计传声器安放在驾驶员的头盔架上噪声较大的一侧,并使传声器朝前,与眼眉等高,距头盔架中心平面250mm±20mm的耳旁处。进行测试时,微耕机呈最大设计耕深旋耕状态,在每个档位上,发动机油门全开,待其稳定后,读取最大噪声值并测定其前进速度。最后测定微耕机发动机油门全开、空驶速度为4-6km/h 档位的最大空驶噪声值和速度。
 
左右两侧分别测三次,同侧三次测定值之差异不大于2dB(A),同侧三次测定值取平均值,取左右两侧平均值中较大者为被试微耕机静态环境噪声。
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