仪表技术与传感器
儀錶技術與傳感器
의표기술여전감기
INSTRUMENT TECHNIQUE AND SENSOR
2015年
5期
24-27
,共4页
DSP%电磁流量计%FIR滤波%粒子群优化%ADC%噪声干扰
DSP%電磁流量計%FIR濾波%粒子群優化%ADC%譟聲榦擾
DSP%전자류량계%FIR려파%입자군우화%ADC%조성간우
Kye words:DSP%electromagnetic flowmeter%FIR filter%particle swarm optimization%ADC%noise interference
针对电磁流量计在抑制噪声干扰和测量性能等方面的不足，研究设计了一种基于DSP的电磁流量计。仪表基于DSP芯片BF504F和高分辨率ADC芯片AD7173，通过DSP实现粒子群优化的FIR滤波和励磁频率可调功能。介绍了电磁流量计各部分的硬件实现和基于DSP软件滤波的实现。流量校准结果表明，该仪表具有良好的线性度、重复性和稳定性，基本误差小于0．2％，重复性误差小于0．1％。仪表根据工况，可设置励磁频率及对应FIR滤波系数，应用灵活，适用于对流量精确度要求较高场合。
針對電磁流量計在抑製譟聲榦擾和測量性能等方麵的不足，研究設計瞭一種基于DSP的電磁流量計。儀錶基于DSP芯片BF504F和高分辨率ADC芯片AD7173，通過DSP實現粒子群優化的FIR濾波和勵磁頻率可調功能。介紹瞭電磁流量計各部分的硬件實現和基于DSP軟件濾波的實現。流量校準結果錶明，該儀錶具有良好的線性度、重複性和穩定性，基本誤差小于0．2％，重複性誤差小于0．1％。儀錶根據工況，可設置勵磁頻率及對應FIR濾波繫數，應用靈活，適用于對流量精確度要求較高場閤。
침대전자류량계재억제조성간우화측량성능등방면적불족，연구설계료일충기우DSP적전자류량계。의표기우DSP심편BF504F화고분변솔ADC심편AD7173，통과DSP실현입자군우화적FIR려파화려자빈솔가조공능。개소료전자류량계각부분적경건실현화기우DSP연건려파적실현。류량교준결과표명，해의표구유량호적선성도、중복성화은정성，기본오차소우0．2％，중복성오차소우0．1％。의표근거공황，가설치려자빈솔급대응FIR려파계수，응용령활，괄용우대류량정학도요구교고장합。
As the problems electromagnetic flowmeter has including noise interference and measurement performance ,an elec-tromagnetic flowmeter was designed based on DSP .FIR filter and adjustable excitation frequency were optimized by particle swarm optimization algorithm through DSP based on DSP chip BF504F and high-resolution ADC chip AD7173.The hardware and software were implemented and described.Flow calibration results show that it has good linearity ,repeatability and stability.The fundamen-tal error is less than 0.2%.The repetition error is within 0.1%.Exciting frequency and FIR filter coefficients can be set according to the working condition,so the meter has flexible application and can be used in the situation with high accuracy.
