无损检测.声发射检测.压电声发射传感器接收灵敏度谱的验证

[中文适用范围]： 本文件规定了一种确定压电声发射传感器接收灵敏度谱的方法，以每个运动输入输出的伏特为绝对单位，其中运动可以是粒子位移（例如以纳米为单位）或粒子速度（例如以毫米/毫米为单位）。 第二）在用于声发射测试的频率范围内，从 20 kHz 到大约 1.5 MHz，其中传感器受到来自直接耦合压电发射器的沿传感器表面法线方向的运动脉冲的刺激。 本文件还规定了一种确定压电发射器发射灵敏度频谱的方法，以绝对单位表示，例如，通过测量发射器活动面上的粒子位移脉冲和发射器的输入电压频谱，以每伏输入的纳米输出为单位。 ，使用扫描激光测振仪。 当入射角不同于法线 (90°) 或当穿过传感器敏感面的波的长度短于传感器敏感面尺寸的约 10 倍时，本文档不包括对传感器响应的已知抵消效应。 敏感的脸。 本文件没有指定测量不同材料对传感器灵敏度影响的方法，但这种影响在附录 F 中得到解决。 注：本文件中描述的方法可以考虑与压电传感器以外的其他传感器一起使用，压电传感器检测运动平面且工作在相同的频率范围内。 [外文原描述]： This document specifies a method for the determination of the receiving sensitivity spectra of a piezoelectric acoustic emission sensor, in absolute units of volts output per motion input, whereby the motion can be particle displacement (e.g. in nanometres) or particle velocity (e.g. in millimetres per second) over a frequency range used for acoustic emission testing, from 20 kHz to about 1,5 MHz, whereby the sensor is stimulated by a motion pulse in normal direction to the sensor’s face from a directly coupled piezoelectric transmitter. This document also specifies a method for the determination of the transmitting sensitivity spectrum of a piezoelectric transmitter in absolute units, for example, in nanometres output per volt input, by measuring both the particle displacement pulse over the transmitter’s active face and the transmitter’s input voltage spectrum, using a scanning laser vibrometer. This document does not include the known cancellation effects on a sensor’s response, when the angle of incidence differs from normal (90°) or when the length of the wave passing across the sensor’s sensitive face is shorter than about 10 times the dimension of the sensor’s sensitive face. This document does not specify a method to measure the influence of different materials on a sensor’s sensitivity, but this effect is addressed in Annex F. NOTE The methods described in this document can be considered for use with other than piezoelectric sensors, which detect motion at a flat face and work in the same frequency range.