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发表于
电子技术
内容:在操作上采用触摸屏与薄膜按键结合的方式,通过串行通信实现上下位机的协调,在实际应用中运行稳定,达到设计要求。,通信协议定义起始符字节数标志符数据校验码结束符@1个字节1个字节若干字节1个字节1个字节5 结论本文介绍了采用ATmgega128单片机作为主控芯片的智能电动跑步机控制器设计,在实现跑步机各种功能的基础上很好地保证了运行的稳定性,在此基础上,可研究将上下位机整合,采用SOPC技术自行设计整个控制系统的板卡,这将大大降低成本并且使整机的稳定性有进一步的提高。
充电电路设想
rb-sama
14年2个月前
回复于
电子技术
内容:【一个合格的充电电路不仅仅要高效,还需要绝对
稳定。
测量仪器总线标准与技术
mass_lynnxy
18年3个月前
发表于
软件综合
内容:VXI总线的出现,将高级测量与测试应用设备带入模块化领域,它拥有稳定的电源、强有力的冷却能力和严格的RFI/EMI屏蔽。
PCB工程师 分级
mass_lynnxy
18年5个月前
发表于
电子技术
内容:布线过程中能看出少量原理设计上低级错误并提出,并能正确进行引脚和门交换,能正确修改网络表和原理图; 5、能正确导入、导出机械图纸并基本看懂结构尺寸要求; 6、能在他人所制定规则或指导下进行一些高速和模拟PCB设计并基本稳定,80%以上不存在相关问题; 3、具备丰富的可制造性方面知识并用于实践和指导工作,所设计或指导他人设计板子90%以上可用于直接量产; 4、熟练高速规则控制下的高密度布局、布线,并且所布模块或板子在稳定可靠的同时能做到
大型分体式DRSSTC的图片鉴赏与设计剖析
rb-sama
8年5个月前
发表于
高电压技术
严肃内容: 专著/论述
内容:这样巨大的容量,可以保证母线钳位电压稳定,保证全桥的稳定工作。
一种空想社会模式
五毒散
14年10个月前
回复于
科学技术学
内容:,那就不可能再是楼主所想象中的社会了.这是其一.其二,除了物质的分配,在精神上则是不可能平均的.比如说,长得帅的和漂亮的,肯定能获得更多异性的青睐,那么这个方面的不平均,又如何能保持楼主所想象的社会的稳定呢
探讨发射小卫星的可行性及路线图问题
拔刀斋
13年9个月前
回复于
喷气推进
内容:操作系统必须选用已经通过可靠性检验的,常见的有uc/os-ii,vxworks,RTEMSwifi不稳定而且不适合高速移动的物体火箭第一级比冲可以比较低,对整体重量影响不大。
固液火箭发动机7s试车
清纯小萝莉
12年5个月前
回复于
喷气推进
内容:目前对于PP—GOX燃料体系的火箭发动机(不包含燃料的供给系统)在以下问题已解决 1.燃料的稳定燃烧 2.大致推移速率的测量 3.使用面板型喷注器提高燃料燃烧的均匀性 以下问题待解决 1.燃料的燃烧完全性
[转帖]锂电池的保养及误区释疑
mass_lynnxy
19年2个月前
发表于
电子技术
内容:化学反应原理虽然很简单,然而在实际的工业生产中,需要考虑的实际问题要多得多:正极的材料需要添加剂来保持多次充、放的活性,负极的材料需要在分子结构级去设计以容纳更多的锂离子;填充在正、负极之间的电解液,除了保持稳定,主要是正、负极材料本身的变化,从分子层面来看,正、负极上容纳锂离子的空穴结构会逐渐塌陷、堵塞;从化学角度来看,是正、负极材料活性钝化,出现副反应生成稳定的其他化合物。,现在只能说,在AC供电稳定的前提下,可以考虑取下电池,前提是养成数据随时备份的习惯。,如果你多数时间是在使用固定电源,交流电源又很稳定,则可以取下电池,将电池的剩余电量充放到40%后放在阴凉的地方保存,但切记不要放到冰箱里;7.
简单讲讲王阳明,顺带说说唯心论。
wink101495
15年10个月前
发表于
科学技术学
内容:就是在这个世界上生存的很适应,很游刃有余,什么事情都能做,都能做得好,而且在做的过程中,能时刻保持内心的平静
稳定。
【干货】磁阻炮杂谈
ChairmanC
7年2个月前
发表于
电磁炮
动手实践: 实验报导,严肃内容: 教程/课程
内容:这里忘了用智能填色,颜色区分有点不明显,不过不影响 中轴线上的分布,这里就可以看出定子铁芯的影响了,磁场明显变宽,明显变强(无铁芯时最高处1.98T,有铁芯是2.36T,提高了20%),无论对于加速的稳定性还是强度
常见的精密电阻
1211
15年3个月前
发表于
电子技术
内容:老化就是长期稳定性,也就是在常温常压下,放在货架子上,经过比较长的时间(比如1年),电阻的变化。
LED日光灯设计方案--PT4107 LED DRIVER
huangyi
13年5个月前
发表于
电子技术
内容:PT4107芯片由T1、D4、C4、R2~R4组成的电子滤波器降压稳压后供电,这个滤波器输入阻抗很高,输出阻抗很小,整流后近300V直流高压经此三极管降压向PT4107 Vin提供约18~20V稳定电压,,确保芯片在全电压范围里稳定工作。,为保证已调好电源板的稳定性,一定要选用涡轮涡杆微调电位器,并在调好后滴胶固封。
行业“老兵”职业生涯回顾
mass_lynnxy
16年3个月前
发表于
电子技术
内容:此后稳定了较长时间,之间也有过16位机但不普及。,如果工艺不改,提高速度是很难的,因为每个梯度都要在速度稳定下来测量,才能保证精度,由于电机的惯性作用,测量的周期已经达到极限。
基于AD9361的图传hdzero图传介绍
chuqiao
1年3个月前
回复于
极客DIY
内容:闭路测试环境测试说明测试频点:538MHz;测试设备:发射机(自研发射机)接收机(自研接收机、创维HD300T DTMB机顶盒)频谱仪(Agilent E4440A)测试标准:接收机最小接收功率下能够稳定锁定信号
学习求助,继---激光叠加另一问题!
hefanghua
14年5个月前
回复于
强激光
内容:为使超短脉冲稳定,无论如何电场绝对相位的控制必须解决的问题。
国际视点:超导列车——德国的梦
大仙
16年5个月前
发表于
极客DIY
内容:这一俘获磁场与轨道磁场相互吸引,由于斥力和吸引力的同时存在,车体得以稳定地悬浮在轨道上方。
公民身份保障系统
玄明
11年9个月前
发表于
极客DIY
内容:这样我们的社会交往将获得更彻底稳固的保障,我们不必担心在街头偶遇的推销员第二天找不到踪迹,不用担心我们的老板或员工卷钱跑掉,也可以用来和家人保持更为稳定的联系。
转载文章:三级重接炮点火控制系统
ogoodcn
16年0个月前
发表于
电磁炮
内容:轨道式和线圈式起步较早.研究相对较多.而重接式是南1986年美国桑迪亚国立试验室的考恩等人最早提出.并申请了美国专利 与前两种相比较.重接型电磁发射具有发射体与线圈无接触、无烧蚀和欧姆损失相对小.发射体稳定性好,除了良好的开关结构设计外.触发脉冲的上升陡度、峰值电压以及触发脉冲注入能量都是很重要的因素 研究表明.随着触发脉冲上升陡度增加.开关延时及其分散性相应的减小:增加触发脉冲的能量将缩短开关的导通时延 :开关丁作稳定可靠也依赖于电压幅值高,对行输出高压脉冲变压器放电.负高压电平引导触发间隙导通.续流电容C,经过触发间隙,硅堆形成回路对间隙进行续流,从而完成主间隙的导通 这种触发方式可靠性高.可以保证系统稳定可靠的触发.但是这种触发方式得到的触发脉冲陡度不够高,在重接型电磁发射系统中.脉冲电源技术至关重要.对触发点火系统的要求也很高 文中给出了重接型电磁发射装置的原理和三级重接型电磁发射实验模型的组成框图.并设计了一套触发点火系统 经过实验.该触发点火系统可靠性高.工作稳定
地球电磁场与自然灾害
季东
2年0个月前
电波长电文
内容:等离子聚变(太阳耀斑现象,地球地震及火山爆发现象)是星体的元素形成从而保存能量,是星体结构稳定性并延长演化时间的重要方式。
真正的全金属复用发动机.难以企及的高效
ABC
16年10个月前
回复于
喷气推进
内容:密封是火箭安全的最 重要技术因素之一,很多重大航天事故都因密封失败.2.钢中就不锈钢和高碳钢是最不宜做喷管的,熔点低.钢喷管没有耐压问题3.硝镁更适合发光剂或炸药,极不适合做燃料 原因:燃料不稳定
【听我说瞎话】四级IGBT可关断加速器,咆哮烈骑!暴走来袭!
听我说瞎话
10年9个月前
发表于
电磁炮
动手实践: 实验报导
内容:[s:309] 最后我发先第一级的关断模块会影响后级,至于原因至今不明,索性把第一级换成可控硅无关断的,反正第一级关断后的效果也不明显[s:332] 更换以后干扰问题再也没有出现过,后级变得非常稳定!
翻译:阻抗测量简史----早期实验
RodTech
10年0个月前
发表于
仪器仪表
严肃内容: 专著/论述
内容:这是所知首个用检零的方法对比测量电阻,其精度与电压源电压无关,解决了困扰欧姆的电池电压不稳定问题。 ,检零计指零表示电势差计的电压与待测电压(两个电阻上的电压,Vx或Vs)相等,这种方法可以准确地对比两个相差很大的电阻阻值,但是所有电压源都要保持
稳定。
,这些用“表”完成的测量,精度是建立在电压、电流表的线性度与直流源的稳定性上。
多种新兴存储器技术的比较和选择策略
mass_lynnxy
16年1个月前
发表于
电子技术
内容:自由原子只有两个稳定位置,一个稳定位置用于表示逻辑1,另一个表示逻辑0。
VMOS场效应管检测的方法
超级用户
16年0个月前
发表于
电子技术
内容:此时栅极是开路的,管的反向电阻值是很不稳定的。,因为功率型场效应管在高负荷条件下运用,必须设计足够的散热器,确保壳体温度不超过额定值,使器件长期稳定可靠地工作。
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