Holder-Pearson Lui, Chase J Geoffrey
Centre for Bioengineering, University of Canterbury, New Zealand.
HardwareX. 2021 Sep 7;10:e00227. doi: 10.1016/j.ohx.2021.e00227. eCollection 2021 Oct.
A low-cost but reliable flow and pressure sensor is an impediment to development of medical equipment, and studies of human respiratory function, which is characterised by relatively low pressures and flows. A Venturi tube ( ) connected to a differential pressure sensor (SDP816-125 Pa) allows accurate measurement of flow between , with Pearson Correlation over 4 min at , and distance correlation . The pressure measurement was similarly accurate using a MPVZ4006GW7U. Both sensors provide an analogue output from a supply, aiding compatibility and customisation. Each populated PCB costs approximately $50USD, and each Venturi sensor costs approximately $1USD. Multiple configurations exist, allowing flow rates up to , increased resolution for specific ranges, and different physical characteristics.
低成本但可靠的流量和压力传感器是医疗设备发展以及人体呼吸功能研究的一个障碍，人体呼吸功能的特点是压力和流量相对较低。连接到差压传感器（SDP816 - 125 Pa）的文丘里管能够精确测量0至[具体数值]之间的流量，在[具体数值]下4分钟内的皮尔逊相关系数以及距离相关系数[具体数值]。使用MPVZ4006GW7U进行压力测量同样准确。两个传感器均从[具体电源数值]电源提供模拟输出，有助于实现兼容性和定制。每个组装好的印刷电路板成本约为50美元，每个文丘里传感器成本约为1美元。存在多种配置，可实现高达[具体流量数值]的流速、特定范围内更高的分辨率以及不同的物理特性。
