该段占用488ksa，而不是预期的500ksa。噪声基底升高，出现音调的副本（镜像中心频率），并且音调每秒打开和关闭许多次。对MATLAB代码的唯一更改是使用“phase =（2 * pi / 100
2019-07-24 15:02
的PWM波形（50us PWM周期）。令我懊恼的是，为了获得多个PWM周期的平均值，我发现需要达到很长的时间尺度。以下是我在示波器上获得的kSa / s读数： - 1s / div（10s /扫描
2018-12-20 16:44
本文介绍了一种三十二通道扫描数据采集模块的设计方案。该方案最高采样率为200KSa/s，存储深度IM×16bit ，垂直分辨率16bit，增益可编程为1、2、5、10、100五个等级的PCI数据采集模块的设计与实现。
2021-04-14 07:00
设计一套能连续采集但只记录故障电流的地铁馈线故障记录系统。另外，课题要求该系统采样率不低于1ksa/s，文件编号带日期和时间，且具有电流增量、电流变化率和频谱分析等功能。其中，采集可以先用电脑上
2015-05-17 10:52
我目前有一个旧系统，可以从HP3457数字万用表中获取电压，并将其与HP激光干涉仪的位置配对。这是一个使用HPIB，HPBasic的相当古老的系统，可以以每秒80到200对的速度获取数据（每个测量会话至少需要30,000对）。我希望通过将速度提高2倍到4倍来改进或替换它，但我也认为现代电子设备可以轻松地将数据收集速度提高10倍或100倍。这个系统不需要经常更改，所以如果不那么谨慎的话，我宁愿不使用Labview。我希望快100倍可能是昂贵的，这可能没问题。测量是; 3VDC至0.001VDC，在最小100mm的距离内，位置的线性分辨率为0.1um或更好。问题：以这种速度获得连续数据对的最佳接口是什么？ GPIB PCI卡？ USB GPIB能胜任这项任务吗？ GPIB以外的东西？任何真实的DVM建议，可以1000 /秒连续捕获3到0.001VDC（30,000个数据对）？在10,000 /秒？关于线性测量编码器的任何现实世界建议，可以输出0.1um分辨率的位置（我喜欢激光，但我怀疑即使是最新的输出位置也可以我想要的速度，因此可以考虑其他编码器）1000 /秒？在10,000 /秒？谢谢大家！ 以上来自于谷歌翻译 以下为原文I currently have an old system that grabs a voltage from a HP3457 DMM and pairs it with a position that comes from a HP laser interferometer.This is a rather old system using HPIB, HPBasic and can get data at 80 to 200 pairs per second (a minimum of 30,000 pairs is needed for eachmeasurement session). I am looking to improve or replace this with a mind of increasing the speed around 2x to 4x, but am also thinking modern electronics mayeasily permit 10x or 100x faster data gathering. This system will not need to be changed often so I would rather not use Labview if somethingless pricy will do. I expect that 100x faster might be pricy and that may be ok. Measurements are; 3VDC to 0.001VDC and linear resolution for position is 0.1um or better over a distance of 100mm minimum. Questions:What is the best interface to get continuous data pairs at this speed?GPIB PCI card?Is USB GPIB up to the task?Something other than GPIB? Any real world recommendations for a DVM that can capture 3 to 0.001VDC continuously (30,000 data pairs) at 1000/ sec? at 10,000/ sec? Any real world recommendations on a linear measuring encoder that can output position at 0.1um resolution (I like the laser, but have my doubts that even the newest can output position as fast as I want, so other encoders can be considered) at 1000/ sec? at 10,000/ sec? Thanks to all!
2018-09-26 15:16
万用表DM3068 为例，利用DM3068 的DCV 档的1000V 量程和10Ksa/s采样速度对市电信号采集，利用USB 接口上传采集的数据，借助C 语言和Visa 驱动实现对电力信号的全自动采集
2019-07-19 07:29
嗨，我正在使用带有VEE Pro，SCPI命令和仪器管理器的直接I / O窗口的U2353A型号。 （我把问题放在最底层）我的目标是为电压值制作一个模拟输入连续数据采集程序，这样我就可以设置电压范围，采样率和每次数据传输的采样数（来自FIFO）。然后将来自FIFO的数据存储在我想要的位置，扫描将重复，直到满足任意条件。 -------------------------------------------------- -------------------------------------------------- -----------------------------------------------目前我的节目看起来有点像这样：WRITE TEXT * RST，* CLS EOL WRITE TEXT“ROUT：SCAN（@ 101）”EOL WRITE TEXT“ROUT：CHAN：RANG”，（变量），“，（@ 101）”EOL WRITE TEXT“ ROUT：CHAN：POL BIP，（@ 101）“EOL WRITE TEXT”ROUT：CHAN：STYPE NRS，（@ 101）“EOL WRITE TEXT”WAV：POIN“，（变量）EOL WRITE TEXT”ACQ：SRAT“，（变量）EOL WRITE TEXT“RUN”EOL //进入连续循环WRITE TEXT“WAV：STAT？” EOL READ TEXT x如果x ==“DATA”// DATA表示WAV：POIN的指定点数满足并准备从FIFO传输然后，WRITE TEXT“STOP”EOL WRITE TEXT“WAV：数据？” EOL READ BINBLOCK x INT 16 ARRAY。* NOEND //然后我将16位数组转换为等效电压值array => folmula“（asReal64（Data）/ 32768）* 10”==> alphanumeric ==> break - -------------------------------------------------- -------------------------------------------------- ---------------------------------------------问题在于什么时候我将6.2V DC电池连接到适当的通道（作为测试），我得到的电压值偏差约为+/- .2V，平均电压约为7.0。 （我正在寻找非常接近6.2V的测量值）//还要注意我的采样率是400k样本/秒，数据块是4mill样本。但我确实尝试改变采样率。有帮助吗？请？ -麦克风 以上来自于谷歌翻译 以下为原文Hi, I'm using a U2353A model with VEE Pro, SCPI commands, and a Direct I/O window from instrument manager. (I put my problem at the bottom) My goal is to make a program for Analog Input continuous data acquisition for Voltage values, such that I will be able to set the voltage range, the sampling rate, and the sample number per data transfer (from FIFO). This Data from the FIFO will then be stored in the location that I desire and the scan will repeat till some arbitrary condition is met. --------------------------------------------------------------------------------------------------------------------------------------------------- Currently my program looks somewhat like this: WRITE TEXT *RST, *CLS EOL WRITE TEXT "ROUT:SCAN (@101)" EOL WRITE TEXT "ROUT:CHAN:RANG ", (variable),", (@101)" EOL WRITE TEXT "ROUT:CHAN:POL BIP, (@101)" EOL WRITE TEXT "ROUT:CHAN:STYPE NRS, (@101)" EOL WRITE TEXT "WAV:POIN ", (variable) EOL WRITE TEXT "ACQ:SRAT ", (variable) EOL WRITE TEXT "RUN" EOL //enters continuous loop WRITE TEXT "WAV:STAT?" EOL READ TEXT x if x=="DATA"//DATA is an indicator that the number of specified points by WAV:POIN is met and ready to be transferred from the FIFO then, WRITE TEXT "STOP" EOL WRITE TEXT "WAV:DATA?" EOL READ BINBLOCK x INT 16 ARRAY.* NOEND //I then convert to 16 bit array to its equivalent voltage valuesarray=>folmula "(asReal64(Data)/32768)*10" ==> alphanumeric ==> break --------------------------------------------------------------------------------------------------------------------------------------------------- The problem is that when I connect a 6.2V DC battery to the appropriate channels (as a test), I get voltage values that have a deviation of about +/- .2V and an average voltage around 7.0. (I was looking for measurements very close to 6.2V)//Also take note that my Sampling rate is 400k samples/sec and the data block is 4mill samples. but I did try varying the sample rate. Any help? Please? -Mike附件Continous mode Continuous DAQ 4 (Closest).vee11.6 KB
2019-03-05 06:40
全差分仪表放大器具有其他单端输出放大器所没有的优势，它具有很强的共模噪声源抗干扰性，可减少二次谐波失真并提高信噪比，还可提供一种与现代差分输入ADC连接的简单方式。低功耗全差分仪表放大器电路怎么设计？
2021-04-06 08:11
我有一个DSO-X2014A，我有一个问题。如何记录USB记忆棒中的长时间连续，不是一个事件而是连续波或信号数字，直接而不是停止。 以上来自于谷歌翻译 以下为原文I have one DSO-X2014A, and I have a question. How make for record a long time continuos in USB memorystick, not a one event but continuos wave or signal digital, direct and not stop.
2018-10-24 11:23
怎么实现基于stm32的数字示波器的设计？
2021-10-12 06:02
