摘要
铁路数字语音记录仪是一种可实时记录、调听、显示铁路行车调度工作中通话的重要电子设备,具有电子化、无机械磨损、功能全面等特点,近年来得到广泛应用。为保证对铁路数字语音记录仪检测结果的可靠性,研究铁路数字语音记录仪的检测技术,分析铁路数字语音记录仪数字音频自动增益控制原理和ADC采样芯片产生的信噪比公式,探讨2kHz频率幅频特性和系统底噪的测试方法,并对测试方法提出优化建议。
The railway digital voice recorder, an important electronic device that can record, listen and display in real time during railway dispatching. It has distinguishing features, such as electronic, no mechanical wear and full featured, which is being used widely in recent years. In order to ensure the reliability of the test results of railway digital voice recorder, this article aims to discuss the detection technology of railway digital voice recorder, the principle of automatic gain control of digital audio for railway digital voice recorder and the formula of signal-to-noise ratio produced by ADC sampling chip are analyzed as well. The test method of 2 kHz frequency amplitude-frequency characteristic and system-base noise is explored, and the optimization recommendation of the test method is being raised.
作者
乔静怡
董成文
姚珍富
张强
李苏雯
QIAO Jingyi;DONG Chengwen;YAO Zhenfu;ZHANG Qiang;LI Suwen
出处
《铁道技术监督》
2019年第8期25-27,共3页
Railway Quality Control
基金
国家自然科学基金(U1534208)
关键词
数字语音记录仪
检测技术
音频自动增益控制
幅频特性
ADC信噪比
Digital Voice Recorder
Detection Techeology
Audio Automatic Gain Control
Amplitude-Frequency Characteristics
ADC Signal-to-Noise Ratio
作者简介
乔静怡,工程师;董成文,高级工程师;姚珍富,高级工程师;张强,工程师;李苏雯,助理研究员
