This paper describes a sensing technique that has been entirely built from off-the-shelf electronic components, with the aim of providing its construction and programming guidelines as an open-source platform which can be continuously updated. The assessments carried out in this investigation indicate that the proposed sensor is suitable for deployment as an accelerograph for seismic monitoring of structural systems. The results show low levels of self- noise, considering the nature of the MEMS analogue accelerometer embedded in the sensor. The amplitude transfer functions exhibit a flat behaviour for the full range of frequencies tested, whose boundaries were limited by the installed capacity within the laboratory. However, this flat behaviour is expected to be coherent up to the resonant frequency of the MEMS accelerometer, whose absolute value is much higher than the bandwidth of frequencies of interest for seismologists and structural earthquake engineers. The clipping tests demonstrate a high linearity of the amplitude transfer function from low acceleration levels up to the vicinity of the maximum nominal recordable acceleration of ±3 g at which a typical roll-off is observed. Under long-time operations, the sensor produces a robust performance, maintaining a steady pace of sampling. The performance of the sensor was finally tested considering non-stationary signals, using a linear shake table to reproduce a wide ensemble of strong-motion recordings from actual earthquakes. Intensity measures of strong-motion commonly used in earthquake engineering were appraised, such as horizontal spectral acceleration, Arias Intensity, and transient peaks of response.

本文介绍了一种传感技术，该技术完全由现成的电子组件构建而成，目的是提供其构造和编程指南，并将其作为可以连续更新的开源平台。在这项调查中进行的评估表明，所提出的传感器适合作为加速度计部署用于结构系统的地震监测。考虑到传感器中嵌入的MEMS模拟加速度计的性质，结果表明自噪声水平较低。振幅传递函数在测试的整个频率范围内表现出平坦的行为，其边界受实验室内安装容量的限制。但是，这种平坦的行为在MEMS加速度计的谐振频率下是一致的，其绝对值远高于地震学家和结构地震工程师所关注的频率带宽。削波测试表明，振幅传递函数从低加速度水平到最大可记录最大加速度±3 g的附近都具有很高的线性度，在该范围内观察到典型的滚降。在长时间运行下，该传感器可产生稳定的性能，并保持稳定的采样速度。最终，在考虑了非平稳信号的情况下，使用线性摇表对传感器的性能进行了测试，以从实际地震中重现大范围的强运动记录。评估了地震工程中常用的强运动强度度量，例如水平频谱加速度，Arias强度和响应的瞬态峰值。