2) zero-crossing detection of electrical level
过零电平检测
1.
The results indicate that, even in case of high concentration of carbon dioxide, the flowmeter still maintains high measurement accuracy due to the techniques employed including zero-crossing detection of electrical level, averaging of multiple transit-time measurements randomly taken, and so forth.
文章设计了实验用以测试CO2的浓度含量对超声波气体流量计测量精度的影响,实验结果表明,由于在流量计中采用了"过零电平检测"、"随机多次测量声时后平均"等技术措施,即使在CO2的浓度较高的情况下,流量计依然可以保持在较高的测量精度。
3) zero-crossing detection
过零检测
1.
In order to solve those problems,this paper introduces a distortion measure algorithm based on DFT and zero-crossing detection.
为解决这些问题,介绍了一种基于DFT和过零检测的数字式失真度测量算法,在某型数字失真度测量仪中,采用基于TMS320C6713型DSP数字信号处理系统成功实现了该算法,结果表明该数字失真度测量仪结构简单,具有较高的测量精度和较快的测量速度。
2.
MCU get timing reference by zero-crossing detection.
单片机通过过零检测获取计时基准,比较当前转速反馈与目标反馈,采用脉宽调制PWM方式来控制三端双向可控硅开关器件的导通相位角及导通时间,实现交流PG电机的平稳调速。
3.
Based on 89S52 single-chip microcomputer,the continuously variable power control is achieved by the AC single zero-crossing detection and the synchronous control of the thyristor’s turn-on angle.
采用89S52单片机通过交流电信号过零检测、同步控制可控硅的导通角的方式实现功率的无级控制。
4) zero crossing detection
过零检测
1.
Wavelet transform zero crossing detection method can be used for the coding and recognition of human iris.
使用小波变换过零检测算法可实现人眼虹膜图像的编码和识别 。
2.
The whole construction graph and the zero crossing detection circuit map are presented.
阐述了系统结构和原理,详细介绍了系统的硬件构成,给出了总体结构图和过零检测电路原理图,并给出了控制用DSP开发板上加载的C程序流程图。
3.
Demodulation algorism is an improvement of zero crossing detection, which doesn t need complicate circuit.
其中解调算法是对过零检测法的改进,不需要传统过零检测法复杂的滤波电路,通过搜索3个参数适用于解调不同频率的2FSK解码,克服了常规解调器只能解调固定2FSK信号的问题。
6) photoelectric zero current detecting circuit
光电零电流检测电路
补充资料：零息票债券；零券息债券
零息票债券；零券息债券一种以低于票面价值的价格发行的债务工具。债券不支付任何票息；它在到期日是以面值赎回的。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条