sample n. 1.样品,货样。 2.标本;榜样,实例。 3.【统计】典型取样,抽检查。 4.【电讯】信号瞬时值。 5.【冶金】 〔 pl. 〕 锌华。 That is a fair sample of his manners. 那就是他的典型态度。 a light sample 光脉冲。 up to sample 1. 和样品一样[相符]。 2. 可以接受的,可以同意的。 vt. 从…取样,从…抽样;提供;货样;对…进行抽样检查。
The hardware of system is the data acquisition equipment ( daq ) , daq includes three main functional modules : fpga , analog sampling and lcd controlling 系统的硬件部分是数据采集卡,数据采集卡在功能上分为fpga ,模拟采样和液晶驱动及控制三个组成部分。
Frequency source is widely used in today ' s electronic equipment and even refered as " a heart " of many electronic systems . the frequency synthesizer with a lot of channels and high frequency stability by means of theory of phase locking has almost been a necessary component in the modern electronic systems such as telecommunication , radar and electronic countermeasure . the phase - locked frequency synthesizer can be generally divided into two kinds : one is digital phase locked frequency synthesizer , the other is analog sampling phase locked frequency synthesizer . compared with the prior , the latter has many merits such as lower phase noise , samller volume , lighter weight and lower power consumption and has a wide foreground in the equipments of microwave band 利用锁相原理来获得波道数目众多、频率稳定度很高的频率合成器,几乎已成为现代通信、雷达和电子对抗等电子系统不可缺少的组成部分。锁相式频率合成器一般分为数字锁相频率合成器和模拟取样锁相频率合成器两类。取样锁相频率合成器与数字锁相频率合成器相比,具有相位噪声低、体积小、重量轻和功耗低等优点,尤其在微波波段的电子设备中,具有广阔的应用前景。
For the measurement of analog signals such as voltage and current of astg , a filter card for pre - disposing is designed , in order to improve real - time performance , algorithms for ac analog sampling is simplified , and a compensation algorithms for phase error due to sequence - sampling is brought forward . for the measurement of impulse - width signals such as rotor - speed and rotor - position - angle , an intelligent interface card based on isa bus is designed . all programs for measure and control based on c + + are compiled and debugged and the flow for system debugging is summarized 为了提高实时性,对交流采样算法进行了简化,并提出了由于非同步顺序采样所造成的相位误差的补偿算法;针对转速、转子位置角等脉冲宽度信号的测量,深入分析了测量原理,设计了基于isa总线的智能接口卡;编制和调试了基于c + +的全部测量控制程序;完成了整个系统的调试,并总结了调试方法。
Supported by heilongjiang province natural science foundation projects " research on the errors mechanism of time division a . c . power measurement " ( no . e9719 ) , " research on theory of analog digital mixed sampling power energy measurement " ( no . e01 - 15 ) and foundation for university key teacher by the ministry of education " the research on the low audio frequency a . c . power measurement smart instrument " ( no . 1087 ) , in this dissertation it is made that a systematic and deep study on power measurement model errors and instrument errors about analog sampling , digital sampling and mixed sampling measurement , and fully experiments about mixed sampling measurement 本学位论文在黑龙江省自然科学基金资助项目“时分割交流功率测量原理误差产生机理的理论研究” (编号: e9719 ) , “模拟数字混合采样功率与电能测量的理论研究” (编号: e01 - 15 )和教育部高等学校骨干教师资助计划项目“中频电功率测量智能仪器的研制” (编号: 1087 )的资助下,以电功率模拟采样测量、数字采样测量和混合采样测量方法为对象,对电功率测量的原理误差和仪器误差进行了系统和深入的理论研究和有关的实验研究。