【作者】 胡妙漩； 曾岳南； 唐雄民；

【Author】 HU Miao-xuan,ZENG Yue-nan,TANG Xiong-min (Institute of Automation,Guangdong University of Technology,Guangzhou,510006,China)

【机构】 广东工业大学自动化学院；

【摘要】 针对目前现有的刚体固有频率测试仪器价格昂贵、便携性差和难以测量刚体多个谐振频率的缺点,利用微机的声卡和虚拟仪器开发平台LabVIEW,以价廉易得的耳塞作为声音采集设备,并采用功率谱分析的方式,提出了一种基于声卡的测量刚体固有频率方法。采用该方法构成的测量系统具有结构简单、价格低廉、易于实现和便携性好等优点。实验结果表明本文提出的检测方法具有较高的精度。更多还原

【Abstract】 At present,a lot of apparatus can be used for testing rigid nature frequency;however these apparatus are very expensive,badly portable and difficult to measure multiple resonant frequencies.Aim to these questions,a new method based on PC’s sound card and virtual instrument development platform is presented. Cheap earplugs are used to sample voice,and power spectrum analyses are adopted in the method.There are lots of merits,such as simple structure,low price,being easy to realize and good portability,in the measurement system composed of the new method.Experiment results validate that the new method is accurate to detect nature frequency.更多还原