In the case of welding with a small current, the temperature and the degree of gas ionization can even be increased by adding a current pulse just before the polarity exchange. 小电流焊接时,在电流极性切换之前叠加电流脉冲,以提高电弧空间的温度和电离度;
When the triggering light goes, the avalanche impact ionization and recombination radiation in the domain result in the formation of the carriers 'conductive channel in the body of the devices and control the current of the Lock-on switching. 当触发光脉冲消失后,单极电荷畴内雪崩电离和辐射复合在开关体内形成了载流子高导电通道,成为了载流子倍增的源泉,控制着Lock-on电流。
This article expoundes the method and course of ionization capacitor filtering test, by analyzing the mechanism or capacitor nullity, the author found out the basic reason of over-capacity, current leakage overfolw and other kinds of nullities. 阐述了电解电容器的老化筛选试验方案和试验过程,并对筛选失效的电容进行了初步的机理分析,找到了容量超差,漏电流超值及其它失效的基本原因。
The remainder molecules in the vacuum tube will be ionized by X-ray irradiation, the ionization current can be detected at a constant DC voltage. 利用X射线对气体分子的电离作用,在一定电压下用一束X射线照射真空灭弧室,使灭弧室内产生电离电流。
As a relatively simple and cheap method to invest the combustion inside an internal combustion engine, spark plug gap ionization current receives more and more interests from different groups. 火花塞离子电流作为研究内燃机中燃烧过程的方法受到越来越多的重视。
This paper describes a new type γ radiation monitoring system with wide range and multi function. It consists of high pressure ionization chamber, electrometer type amplifier, voltage current converter and STD bus. 本文介绍了一种多功能、宽量程的新型γ辐射监测系统,它由高压充气电离室、静电计型放大器、电压/电流变换器及STD监控系统组成。
By two photon resonant three photon ionization in atomic potassium, the ion current decay curve was measured. 在钾蒸气中用双光子共振三光子电离法测出了钾原子6S态的电离流随时间的衰减曲线。
This paper describes mechanism detective methods and the application to engine diagnosis and control of spark plug ionization current. 描述火花塞离子电流产生机理、检测方法及其在发动机控制、诊断中的应用。
Beyond the upper limit of the linear region of an ionization gauge, there is a falloff in the ion current with the increase of the measured pressure. 在电离真空规的线性测量上限部分,离子流随着压强上升而衰降。
The working principle and structure of a surface ionization ion source with high current is described systematically. 本文系统地描述了强流表面电离离子源的工作原理和结构。
The voltage and gas ionization with current zero-crossing and the electron emission ability of the electrode are the principal factors of re-ignition of alternating-current welding arc. 交流电弧再引燃主要影响因素是电流换向瞬间的电压、电弧空间的电离度和电极发射电子的能力。
The continuous monitoring system consists of a high pressurized ionization chamber, integrated weak current amplifier, V/ F converter and intelligent data recorder. 该系统由高气压电离室,集成化弱电流放大器,V/F变换器和智能化数据记录仪组成。
Research on combustion diagnosis system based on spark plug ionization current 基于火花塞离子电流的燃烧诊断系统研究概述
The stability of the welding arc depends mainly on the voltage and the gas ionization when current zero-crossing as well as the electron emission ability of the electrode. 其电弧稳定与否,主要取决于电流过零瞬间的电弧空间电离度、电极发射电子能力及再引燃电压的上升速度。
For the current in the ionization chamber is not amplified, so it is hard to collect the electric signal, in this paper, a direct I/ F convertor is used to convert the electric current signal into frequent signal. 由于电离室本身不对电流放大,因此信号的采集较为困难,本文另外介绍了用I/F直接变换的电路以达到信号的转换。
After the glass surface is treated some suitable insulating material by ionization method, a film which is water-repellent can be formed on the surface of glass, so that the leakage current on the glass surface is decreased about 10 times in humid condition. 选择合适的处理剂对玻璃进行离子表面处理后.能在它的表面生成一层牢固的憎水膜,使玻璃在潮湿条件下的泄漏电流减小10倍左右;
Measurement of pulse ionization electron current for electron impact ion source 电子轰击离子源脉冲离化电子流的测量
The mobility of charged particles in the outer layers of ionization region plays a certain role in discharge current formation. 电离区外层离子迁移对电流形成起一定作用;迁移区内,电流强度与原点的距离无关。
Therefore, based on the consideration of both photocurrent increase factor due to transient ionization effects and threshold current density decrease factor due to displacement effects, we obtain an integrated LD optical response model of radiation effect. 因此,在综合考虑了瞬态电离效应的光电流增加因素和位移效应的阈值电流密度衰减因素的基础上,获得了LD辐射效应综合光学响应模型。
The traditional detecting method is based on the strong gas ionization current, which will destroy the nano structure of the electrode. 传统的击穿电压和击穿电流的气体检测方法建立在气体剧烈放电基础上,会对电极的纳米结构造成严重破坏。
The radiation will lead to the ionization of outer election in LD, and generate photocurrent in LD; this kind of current has no difference with the injection current, thus leading to an optical power increases. 瞬态电离效应是辐射导致外层电子电离,并在LD中产生光电流,这种电流与电源注入电流是无差别的,因此进一步导致光功率增加。
In this work, dark discharge current of gas ionization sensor and the character of the pulse current after breakdown were studied other than the decrease of breakdown voltage and breakdown current value, which were main methods for previous research. 本论文避开传统的依靠击穿电压下降和击穿电流值来检测气体的方法,重点研究了场致电离传感器的暗电流和气体击穿后脉冲电流特性。
A more precise model of the pinch-off voltage of 4H-SiC MESFET is given, with the effects of incomplete ionization of dopants, the interface states and the reverse current are considered. 给出了一种计算4H-SiCMESFET夹断电压的精确模型,考虑杂质的非完全离化、界面态、反向漏电流等的影响。