1.适用范围 本标准适用于工具、机械等振动源传至手上振动测量用的手持式工具振动度计(以下称作工具振动度计)。 2.术语定义 本标准所用术语的含义如下。 (1)工具振动度 用20log(a/a_0)来定义加速度级的修正值。单位用分贝(dB)表示。式中,a_0是基准振动加速度,为10~(-5)m/s~2。 此外,a是已作频率修正的振动加速度有效值(m/s~2),利用表1及图所示的频率响 1. Scope This standard applies to tools, machinery and other sources of vibration transmitted to hand vibration measurement hand-held tool vibration meter (hereinafter referred to as tool vibration meter). 2. Definitions of terms The meaning of terms used in this standard are as follows. (1) Vibration of the tool Use 20log (a / a_0) to define the correction value for the acceleration level. Units are expressed in decibels (dB). Where, a_0 is the reference vibration acceleration, is 10 ~ (-5) m / s ~ 2. In addition, a is the frequency-corrected vibration acceleration rms (m / s ~ 2), and the frequency response shown in Table 1 and the figure