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爆炸冲击测量的信号滤波

爆炸冲击测量的信号滤波
Filtering for Pyroshock Measurements

PFI的电压、桥路、电荷及IEPE传感器信号调理插卡系列为困难的爆炸冲击测量提供了不可取代的优异性能。我们的产品提供了高压摆率、宽带宽以及陡峭、可程控的信号滤波。

 

Precision Filters' suite of signal conditioning cards for voltage, bridge, charge and IEPE sensors provide the high performance required for difficult pyroshock measurements. Our products offer high slew rate, wide bandwidth and sharp, programmable filtering.

 

在2013年2月版的声和振动杂志上,PFI的应用工程师Alan Szary和Doug Firth合作发表了一篇论文,提出了基于特定的冲击响应谱(SRS)误差目标,冲击测量系统频响的一系列设计标准。他们提出的方法并不拘泥测量系统参数的一套严格规则,而是允许工程师在滤波器类型、设置和加速度计共振频率之间进行权衡,以控制冲击响应谱误差小于允许的最大值。采用满足此设计标准的PFI LP8FP FLAT/PULSE低通滤波器,可有效使用低共振频率(≤100 kHz)的压电传感器或高共振频率的压阻传感器来完成一个有效的10kHz冲击响应谱。在这种设计方法的指导下,滤波器可以最优设定以满足所需的SRS误差,同时尽可能衰减加速度计的共振。

 

In the February 2013 edition ofSound and Vibration Magazine, Precision Filters' application engineers Alan Szary and Doug Firth co-authored a paper that proposed a set of design criteria for a shock measurement system frequency response based on a chosen Shock Response Spectrum (SRS) error target. Rather than follow a set of strict rules for measurement system specification, the methodology they propose allows the engineer to navigate the tradeoffs between the filter type and setting and the accelerometer resonant frequency in order to keep within a maximum SRS error. Using the Precision Filters LP8FP FLAT/PULSE low-pass filter in accordance with our criteria, either lower resonance (≤100 kHz) piezo-electric transducers or higher resonance piezo-resistive transducers may be effectively used to perform a valid 10 kHz SRS. Following the design methodology, the filter can be optimally set to achieve the desired SRS error while maximizing attenuation of accelerometer resonance.

 

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