摘要
为了提高动态轴重式汽车衡称重的精度,提出一种采用过采样的方式提高A/D转换有效位数方法。A/D转换的位数决定了信噪比,提高信噪比可以提高A/D转换的精度。在利用相同的A/D采样速率的条件下,采用过采样技术可减小量化误差,并获得与高分辨率相应的信噪比,增加被测数据的有效位数,提高A/D的分辨率。对实验结果的分析表明:通过过采样方法处理后的采样信号,可使动态轴重式汽车衡在保证其称量达1%精度时,提高称重过车速度。
In order to improve the accuracy of weigh-in-motion,the way of over-sampling is presented to increase the MD＇s effective digitals. The convertible digital determines the signal noise rate （SNR） while to improve the SNR consequently, the precision of AID is increased;when making the best of the A/D＇s speed,the over-sampling can reduce the error,and gain the equal SNR with high resolving power. By this way,the A/D＇s resolving power increases through improving the effective digitals of metrical data. The experimental results of the analysis show that： by choosing sampling signals by the way of the over-sampling, the metrical speed of dynamic automotive metrical can be increased when holding the accuracy of weigh-in-motion within one percent.
出处
《电子设计工程》
2010年第8期36-38,共3页
Electronic Design Engineering
关键词
过采样
有效位数
信噪比
分辨率
精度
over-sampling
effective digital
the signal noise rate
resolving power
accuracy
