2025年04月06日 星期日 首页   |    期刊介绍   |    编 委 会   |    投稿指南   |    期刊订阅   |    统合信息   |    联系我们
计量学报  2024, Vol. 45 Issue (7): 1064-1072    DOI: 10.3969/j.issn.1000-1158.2024.07.17
  声学计量 本期目录 | 过刊浏览 | 高级检索 |
基于FPGA的宽带ADCP流速校准系统
陈奕基1,郭世旭1,王萧博2,焦君圣1,赵鹏1
1. 中国计量大学原位计量教育部重点实验室, 浙江 杭州 310018
2. 浙江省计量科学研究院国家市场监管重点实验室 (声学振动精密测量技术), 浙江 杭州 3100632
Broadband ADCP Flow Rate Calibration System Based on FPGA
CHEN Yiji1,GUO Shixu1,WANG Xiaobo2,JIAO Junsheng1,ZHAO Peng1
1.Key Laboratory of In Situ Metrology Ministry of Education, China Jiliang University, Hangzhou, Zhejiang 310018, China
2. Zhejiang Institute of Metrology, Key Laboratory of Acoustics and Vibration Precision Measuring Technology for State Market Regulation, Hangzhou, Zhejiang 310063, China
全文: PDF (606 KB)   HTML (1 KB) 
输出: BibTeX | EndNote (RIS)      
摘要 声学多普勒流速剖面仪(ADCP)可采用声学应答并发射模拟回波的方式开展流速校准,但其校准精度和校准流速下限受系统时钟精度影响,目前基于该方式的ADCP流速校准系统难以针对1m/s以下小流速进行校准。提供了一种低成本、水池环境可实施的宽带ADCP流速校准系统方案,即基于FPGA设计一套宽带ADCP流速校准系统,采集ADCP发射声波信号并进行处理,再向ADCP发射携带水体流速信息的模拟回波信号,通过模拟流速值与实际输出值的比较,实现ADCP的流速校准。校准系统通过直接数字频率合成和锁相频率合成(DDS+PLL)的技术合成高精度时钟信号,时钟信号驱动信号采集与回放产生高精度模拟回波信号。最后,在小型消声水池内针对中心频率为300kHz的宽带ADCP开展(0.2~1)m/s小流速校准实验,结果表明,该校准系统的测量不确定度达到(0.5%模拟流速值+0.005)m/s,验证了校准系统的可靠性。
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
陈奕基
郭世旭
王萧博
焦君圣
赵鹏
关键词 水声计量声学多普勒流速剖面仪;流速校准频偏应答FPGA时钟合成不确定度评定    
Abstract:The ADCP (acoustic Doppler velocity profiler) can use the method of acoustic response and emission of simulated echoes to carry out flow calibration,but the calibration accuracy and the lower limit of calibration flow velocity are affected by the system clock precision.At present,the ADCP flow calibration system based on this method is difficult to calibrate the small flow velocity of less than 1 m/s.To provides a low-cost,water pool environment implementable broadband ADCP flow calibration system scheme,which is to design a broadband ADCP flow calibration system based on FPGA,collect and process the ADCP transmitted acoustic wave signal,and then transmit the simulated echo signal carrying water flow velocity information to the ADCP.By comparing the simulated velocity value with the actual output value,the flow calibration of the ADCP can be realized.The calibration system uses DDS+PLL (direct digital frequency synthesis and phase-locked frequency synthesis) technology to synthesize high-precision clock signals.The clock signals drive signal acquisition and playback to generate high-precision simulated echo signals.Finally,in a small anechoic water pool,the calibration experiments are carried out for the broadband ADCP with a center frequency of 300 kHz in the small flow velocity range of (0.2~1)m/s.The results show that the measurement uncertainty of this calibration system reaches (0.5% simulated flow velocity + 0.005)m/s,which verifies the reliability of the calibration system.
Key wordshydroacoustic measurement    acoustic doppler current profiler    flow rate clibration    frequency offset response    FPGA    clock synthesis    uncertainty assessment
收稿日期: 2023-07-26      发布日期: 2024-07-04
PACS:  TB95  
  TB937  
通讯作者: 郭世旭(1987-),河南平顶山人,中国计量大学副教授,从事水声计量测试技术研究。Email: guoshixu@cjlu.edu.cn     E-mail: guoshixu@cjlu.edu.cn
作者简介: 陈奕基(1999-),广东汕头人,中国计量大学硕士研究生,研究方向为水声计量测试技术。Email: easy199911@163.com
引用本文:   
陈奕基,郭世旭,王萧博,焦君圣,赵鹏. 基于FPGA的宽带ADCP流速校准系统[J]. 计量学报, 2024, 45(7): 1064-1072.
CHEN Yiji,GUO Shixu,WANG Xiaobo,JIAO Junsheng,ZHAO Peng. Broadband ADCP Flow Rate Calibration System Based on FPGA. Acta Metrologica Sinica, 2024, 45(7): 1064-1072.
链接本文:  
http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2024.07.17     或     http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2024/V45/I7/1064
京ICP备:14006989号-1
版权所有 © 《计量学报》编辑部
地址:北三环东路18号(北京1413信箱)  邮编:100029 电话:(010)64271480
本系统由北京玛格泰克科技发展有限公司设计开发  技术支持:support@magtech.com.cn