氧气浓缩器多参数测量装置的研制

Development of multiparameter measurement device for oxygen concentrators

目的研发一种氧气浓缩器的气体温度、压力、流量和氧气浓度的多参数测量装置,用于监测氧气浓缩器在标准YY 9706.269—2021中电磁兼容抗扰度实验时的基本性能。方法通过对氧气浓缩器电磁兼容抗扰度实验特点的分析,研发装置结构设计成回字型,由温度传感器、压力传感器、可调节流阀、质量流量计、顺磁氧传感器、电源模块、数据采集器和数据记录软件组成,其中测量模块要求精度高、响应快、稳定性好,数据采集器要求分辨率高、采样率高,数据记录软件基于LabVIEW开发的检测应用程序。再使用标准气体、数字多用表和质量流量计等测量仪器,对研发装置进行氧气校正和准确性验证。同时根据标准YY 9706.269—2021条款202.6.2.1.10要求,选择医用分子筛制氧机作为样品进行电磁兼容抗扰度测试,使用研发装置监测样品的基本性能。结果研发装置的参数测量达到如下指标,温度的量程是0~100℃,压力的量程是0~200 kPa,流量的量程是0~15 L/min,氧气浓度的量程是0~100%;温度的准确度是±0.5℃,压力准确至所测值的±2%以内,流量准确至所测值的±2%以内,氧气浓度准确至所测值的±1%以内。结论研发装置能够准确测量氧气浓缩器的气体温度、压力、流量和氧气浓度,各个参数的测量结果以Excel文件形式保存。研发装置符合标准YY 9706.269—2021对氧气浓缩器在电磁兼容抗扰度实验的相关要求。

Objective We develop a multiparameter measurement device for gas temperature,pressure,flow,and oxygen concentration of an oxygen concentrator,used to monitor the essential performance of the oxygen concentrator in electromagnetic compatibility immunity testing in standard YY 9706.269—2021.Methods By analyzing the electromagnetic compatibility immunity testing characteristics of oxygen concentrators,the development device structure is designed as a loop type,consisting of temperature sensors,pressure sensors,adjustable flow valves,mass flow meters,paramagnetic oxygen sensors,power modules,data collectors,and data recording software.The measurement modules require high accuracy,fast response,and good stability.The data collector requires high resolution and sampling rate.The data recording software is based on a detection application developed in LabVIEW.Then we use measurement instruments such as standard gas,digital multimeter,and mass flow meter to perform oxygen calibration and accuracy verification on the development device.At the same time,according to the requirements of YY 9706.269—2021 clause 202.6.2.1.10,a medical molecular sieve oxygen generator is selected as a sample for electromagnetic compatibility immunity testing,and the essential performance of the sample is monitored by using the development device.Results The parameter measurement of the device meets the following indicators,the temperature range is 0°to 100℃,the pressure range is 0 kPa to 200 kPa,the flow rate range is 0 to 15 L/min,and the oxygen concentration range is 0 to 100%.The measurement accuracy is that the temperature is±0.5℃,the pressure is accurate to within±2%of the measured value,the flow is accurate to within±2%of the measured value,and the oxygen concentration is accurate to within±1%of the measured value.Conclusions The development device can accurately measure the gas temperature,pressure,flow rate,and oxygen concentration of the oxygen concentrator,and the measurement results of each parameter are saved in Excel file format.The development device meets the relevant requirements of YY 9706.269—2021 for electromagnetic compatibility immunity testing of oxygen concentrators.