一种YY 0709—2009中听觉报警信号测试系统的设计

Design of Audible Alarm Signal Test System Based on YY 0709-2009 Standard

目的:设计一种听觉报警信号测试系统,以满足YY 0709—2009标准的测试要求。方法:采用心型指向的电容式麦克风作为听觉报警信号的采集模块。选取采样率达90 kHz的外置模数转换卡作为信号转换模块并直接连接于麦克风输出端,将采集到的数字信号传入计算机。在计算机中编写分析软件对数据进行分析,从而得到待测结果。结果:可实现对YY 0709—2009标准条款的高效准确测试。结论:该系统具有集成度高、操作简便、显示结果直观等优点,但仍需多次移动游标以完成测试,如可实现软件自动测量,从而直接给出待测参数数值将可进一步提升测试的效率和准确性,这也是课题组的下一步研究重点。

Objective To design an audible alarm signal test system based on YY 0709--2009 Standard. Methods A capacitor microphone was used as the acquisition module of the audible alarm signal. An external analogue-to-digital converter with a sampling rate of 90 kHz was connected with the outlet end of the microphone. The acquired digital signals were transmitted into the computer, then the software was developed to analyze the data to get the results. Romt~ The items in YY 0709--2009 Stan- dard were tested efficiently and accurately. C onlugion The system is highly integrated and operated easily; furthermore it can display the results visually. But it still needs to complete the test by moving the cursor for several times, and the software has to be developed to enhance the efficiency and accuracy.