电流是基本物理量之一,以安培(A)为单位。当1A恒定电流保持在真空中相距 1米的两无限长、圆截面可忽略的平行直导线内时,在此两条导线之间在每米长度上所产生的力为2×10-7牛顿。由于无法实现这一理论定义,实际上采用尽可能接近于定义条件的装置来复现安培。
... electric current density 电流密度 electric current measurement 电流测量 electric current sensor 电流传感器 ...
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测控技术杂志社,测控在线—磁力矩器测试设备中关键技术的研究 关键词:磁力矩器;电流测量;误差补偿 [gap=1004]Key words:magnetorquer;current measure;error compensation
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...感应线圈炮;电流测量;速度测量;弹丸初速度 [gap=1392]Keywords: single stage induction coil launchers; current measuring; velocity measuring; muzzle velocity of armature ..
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Conventional electromagnetic current transformers(CT) possess high accuracy of steady-state electrical current measurement, but produce problems caused by magnetic saturation. By comparison, optical current transducers(OCT)have many advantages over CT and can measure fault transient current.
传统电磁式CT具有较高稳态电流测量精度,但存在饱和问题;而光学电流互感器(简称OCT)无此缺点,能测量故障暂态电流,但受温度应力引起的线性双折射的影响大,精度较低。
参考来源 - 基于自适应技术的组合式光学电流互感器的研究This article is a very good attempt of studying the large current FBG sensors, provided a reference for the fiber grating sensing technology into the high current measurement.
本文是研究光纤光栅直流大电流传感器的一次很好的尝试,为光纤光栅传感技术进入大电流测量领域提供一定的参考。
参考来源 - 光纤光栅直流大电流传感器研究·2,447,543篇论文数据,部分数据来源于NoteExpress
湿度也能影响弱电流测量。
这种电流能够大大降低弱电流测量的准确度。
These currents can degrade the accuracy of low current measurements considerably.
若干误差源会对弱电流测量的准确度产生严重的影响。
A number of error sources can have serious impacts on low current measurement accuracy.
We know that charge is equal to the integral of current times the time. And he knows the current, he knows how much time and then he weighs this.
我们知道电量等于电流,对时间的积分,他知道电流,他也知道时间,然后他测量这个。
And he measures how much charge is required.
他也测量出了需要多少电流。
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