声级计电性能自动检定系统的设计与实现

Design And Implementation Of Automatic Verification System For Electrical Performance Of Sound Level Meter

摘要:

目前人们对噪声污染越来越重视，送检的声级计日益增多，传统的手动检定方式的效率已经很难应付，因此提出设计一款基于LabVIEW软件平台的声级计自动检定系统,以实现声级计的自动检定。系统依据JJG188-2017《声级计检定规程》设计，通过控制标准信号源 (KeySight33520B)和程控精密衰减器生成标准检点信号传输到声级计电信号输入端，声级计响应以后将检定结果返回给系统，文章介绍了系统的设计方案。经过实验，系统可测量声级计频率范围10 Hz～20 KHz，声压级动态范围110 dB；在实际应用中能很好的完成仪器自动控制、数据采集、数据分析处理、检定原始数据记录报告生成等自动化检定工作，提高了声级计检定的工作效率、减少人为误差确保了检定结果的准确可靠。

Abstract:

At present, people pay more attention to noise pollution and more sound level meters are sent for inspection. The efficiency of traditional manual verification method is difficult to cope with. Therefore, an automatic verification system of sound level meter based on LabVIEW software platform is proposed to realize the automatic verification of sound level meter. The system is designed according to JJG188-2017“Verification Regulation of Sound Level Meter”，By controlling the standard function signal generator (KeySight 33520B) and program-controlled precision attenuator to generate the checkpoint signal and transmit it to the electrical signal input terminal of the sound level meter. After the sound level meter responds to the response, the test results are returned to the system,this paper introduces the design scheme of the system. Through the experiment, the system can measure the frequency range of sound level meter from 10 Hz to 20 KHz, and the dynamic range of sound pressure level is 110 dB. In practical application, the system can complete the automatic verification of instrument automatic control, data acquisition, data analysis and processing, and verification of original data record, which improves the work efficiency of sound level meter verification, reduces human error, and ensures the accuracy and reliability of verification results.