YY0709-2009医用报警系统标准难点分析与解读

目的分析和解读医用电气设备和医用电气系统中报警系统的主要技术指标视觉报警信号特征和听觉报警信号特征的标准要求。方法结合设计实例和常见问题,对视觉报警信号特征的“距离”要求和“操作者的位置”要求,听觉报警信号的“时域特征”和“频域特征”进行分析,同时对报警信号设计提供建议。结果实现对视觉报警信号特征,听觉报警信号时频特征:脉冲数、脉冲间隔、脉冲群间期、脉冲振幅差异、脉冲有效持续时间、上升时间、下降时间、脉冲频率、谐波数量、谐频与基频幅值差异和音调的论述。结论正确理解标准要求,对产品设计和检验具有重要意义,有助于提高产品质量水平,保障人民群众用械安全。

Analysis and Interpretation for the Difficult Clauses of the YY0709-2009 Medical Alarm System Standard

Objective To analyze the main technical indicators of the alarm system in medical electrical equipment and medical electrical systems-the standard requirements for the characteristics of the visual alarm signal and the auditory alarm signal.Methods Combining the design instances and the common problems,the“distance”requirement and the“operator’s position”requirement of the visual alarm signal characteristics,the“time domain characteristic”and the“frequency domain characteristic”of the auditory alarm signals were analyzed.The suggestions on the design of the alarm signals were provided.Results The characteristics of the visual alarm signal and the time-frequency characteristics of the auditory alarm signal were discussed,including pulse number,pulse spacing,interburst interval,pulse amplitude difference,effective pulse duration,rise time,fall time,pulse frequency,harmonic quantity,the difference between harmonic and fundamental amplitude and melodies.Conclusion Correct understanding of the standard requirements is of great significance in the product design and inspection,which helps improve the product quality and ensure the safety of the people.