【摘要】 针对多功能声校准器校准过程中校准时间长、校准成本高的问题，论文提出了一种基于STM32单片机的自动校准系统，通过冲击实验和数学计算建立该设备的电声电传递函数，并针对系统的特点设计相关硬件和自适应PID算法，在误差处理方面采用分程放大减小电信号有效值转化时产生的误差，最后采用标准传感器对其进行测试，结果表明，校准装置可校准的声压级范围为130 dB～168 dB，校准频率范围为100 Hz～8 kHz，校准后声校准器的带内不平度小于1 dB。符合国家标准对声校准器的误差规定，在校准时间上，完成一个校准周期花费的时间比传统的PID算法快5倍到6倍，可以完成对多功能声校准器进行扫频校准和定点校准的工作。更多还原

【Abstract】 Aiming at the problems of long calibration time and high calibration cost in the calibration process of multi-function acoustic calibrator,an automatic calibration system based on STM32 single-chip microcomputer is proposed. The electroacoustic and electric transfer function of the device is established through impact experiment and mathematical calculation,and the related hardware and adaptive PID algorithm are designed according to the characteristics of the system. In terms of error processing,fractional amplification is used to reduce the error generated during the conversion of electrical signal effect value. Finally,standard sensors are used to test it. The results show that the sound pressure level range that can be calibrated by the calibration device is130 dB～168 dB,the calibration frequency range is 100 Hz～8 kHz,and the in-band unevenness of the sound calibrator is less than1 dB after calibration. In accordance with the national standard for the error of the acoustic calibrator,in terms of calibration time,the time spent to complete a calibration cycle is that 5 times to 6 times faster than the traditional PID algorithm,which can complete the sweep frequency calibration and fixed-point calibration of the multi-function acoustic calibrator.更多还原