多功能声校准器  

Multifunctional Acoustic Calibrator

作　　者：陈剑林[1] 杨增丰[1] 张美娥[1] 黄强 

机构地区：[1]中国计量科学研究院

出　　处：《现代计量测试》1997年第3期29-33,14,共6页Modern Measurement and Test

摘　　要：由中国计量科学研究院研制的多功能声校准器能在多达１１个不同的频率点上进行声校准，并采用声压缩技术，使声压级不受环境、腔体积变化的影响，保证了校准量值的准确可靠。正弦信号源部分采用先进的数字合成技术并由５１系列单片机控制和多位点阵式液晶显示，不仅大大提高了频率准确度和猝发音持续时间的准确度，实现了相位零起，而且操作简便。经测试，样机的各项技术指标达到了ＩＥＣ９４２中规定的技术要求，属国际先进水平。The Multifunctional Acoustic Calibrator developed by the National Institute of Metrology can carry out the acoustic calibration at 11 different points of frequency. By using sound compression technique, the sound pressure levels are insensitive to environment and volume change of the coupler, thus, the accuracy and reliability of the calibration values can be guaranteed. Based on advanced digital wave synthetic technique, the sine signal generator is controlled by series 51 microprocessor and adopts multi digit LCD display, therefore, the accuracy of frequency and the accuracy of duration of the burst sound have been significantly improved, and phase start from zero has been realized. All the specifications of the prototypes have met the technical requirements of IEC 942, and reached international advanced level.

关 键 词：声校准器 声学测量仪器 校准声级计 

分 类 号：TB528[理学—物理]