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大家好,
我想知道我必须把什么样的参数放在仪器放大器中以获得输出信号。 我指定我使用肱二头肌的肌肉。 所以请帮助我同性恋 人工智能电路 23.4 K 以上来自于百度翻译 以下为原文 hello every one, I want to know exactly what i have to put like a parameter in the Instrumentation amplifier to get a signal in the output . i specify that i use a mesure of biceps muscle . so please help me gays
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17个回答
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首先你必须知道你的信号的大小。ECG信号在0.5至2 VPP的范围内。肌电信号通常较小。
设置你的PGA增益为50。不要使用差动到单端变换器。如果你直接从PGA输出到16位AdCdDelsig的差分输入,系统将工作得更好。你几乎肯定要把两个或三个无源滤波器的极点放在输入上,把频带限制设置为几百赫兹。为了保持共模抑制,应该仔细匹配极点位置。在EMG频率(小于100 Hz)下,信号滤波(输入滤波之后)最好在软件中完成,而不是模拟硬件。 ——丹尼斯,PSoC Apps 以上来自于百度翻译 以下为原文 First you have to know the size of your signal. ECG signals are in the range of 0.5 to 2.0 Vpp. EMG signals are ususally smaller. Set your PGAs gain of 50. Don't use the differential to single ended converter. The system will work better if you go directly from the PGA outputs to the differential input of a 16 bit ADC_Delsig. You will almost certainly want to put two or three poles of passive filter on the inputs to set a band limit to a few hundred Hz. The pole locations should be carefully matched in order to preserve the common-mode rejection. At EMG frequencies (less than 100 Hz), the signal filtering (after the input filtering) is best done in software, not analog hardware. ---- Dennis, PSoC Apps |
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谢谢您的宝贵信息,我还有一个关于滤光片的问题,我想使用一个带通滤波器的巴特沃思滤波器。
我有一个问题,使用带通滤波器在这个规模, 我使用了FIR滤波器,但是当我看到的范围内,50赫兹没有被移除!!!!!我使用128个STAP(MAX) 我想要一个不同的ID,关于如何实现这个过滤器&如何组合两个滤波器(高通和低通)来创建带通滤波器。 当做, 以上来自于百度翻译 以下为原文 Thank you sir for your precious information i have an other question about a filter bloc i want to use a butterworth filter which the band pass is between [50____500] HZ . i have a problem to use the Band pass filter in this scale, i used the FIR filter but when i saw in the scope the 50 hz was not removed!!!!. i use 128 staps (max) i want to have a different idéa about how can i implement this filter & how can i combine two filter (high pass & low pass ) to create band pass filter Regards, |
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你试过像附件中的设置了吗?
鲍勃 过滤器3JPG 101.6 K 以上来自于百度翻译 以下为原文 Did you try settings like in the attached picture. Bob
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Marloe先生,你测试过这个电路吗????
谢谢您,先生。 以上来自于百度翻译 以下为原文 Have you test this circuit Mr Marloe ??? thank you sir |
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不是我为您设置的配置,而是其他两个过滤器,它们都工作。
当您的过滤器不能按您的预期工作,您可以发布您的完整项目,以便我们都可以查看您的所有设置吗?要做到这一点,使用C造饰者和GT;文件-GT;创建工作区束(最小)并附加结果文件。鲍勃 以上来自于百度翻译 以下为原文 Not this configuration that I set up for you, but a couple of other filters and all of them work. When your filter does not work as you expect, can you post your complete project, so that we all can have a look at all of your settings? To do so, use Creator->File->Create Workspace Bundle (minimal) and attach the resulting file. Bob |
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您可以通过将WaveDAC8放置在示意图上并生成拐角来尝试过滤器。
频率和查看过滤器输出。改变其采样频率以获得另一个采样频率 角落。 问候,Dana。 以上来自于百度翻译 以下为原文 You can try the filter by placing WaveDAC8 onto the schematic and generate the corner frequencies and look at the filter output. Change its sample frequency to get the other corner. Regards, Dana. |
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如果你希望线性相位二阶可能不是最好的解决方案,请参阅相
曲线以下 以上来自于百度翻译 以下为原文 If you want linear phase BiQuad may not be best solution, see phase curve below - |
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另一种方法是使用2个opAMPS并做一个四阶Sallen Key(Ti SuffelPro),
免费下载) 以上来自于百度翻译 以下为原文 An alternative is to use 2 OpAmps and do a 4'th order Sallen-Key (TI Filtrerpro, free to download) - |
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如果你的滤波器是从50赫兹到500赫兹,那么根据定义,50赫兹不会被移除。标准滤波器规格是-3dB的角落频率,因此,与您50-500 BPF,在50 Hz的信号衰减只有30%。你真正需要的是什么,你想要摆脱什么?你考虑过50赫兹的陷波滤波器吗?这很容易在PSoC Creator中实现。
丹尼斯 以上来自于百度翻译 以下为原文 If your filter is from 50 Hz to 500 Hz, then by definition, 50 Hz is not removed. The standard filter spec is -3dB at the corner frequencies, so that with you 50-500 BPF, the signal at 50 Hz is attenuated by only 30%. What do you really need and what are you trying to get rid of? Have you considered a notch filter at 50 Hz? This is easily implemented in PSoC Creator. ---- Dennis |
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肌电图,心率,当然你想要50拍/秒,甚至更低的一部分。
范围。正如SEG建议的也许是一个缺口,以摆脱你的50赫兹电力线问题, 或者在差分放大器的良好CMR,如果是源,和LPF。 问候,Dana。 以上来自于百度翻译 以下为原文 Being EMG, heart rate, surely you want 50 beats/sec or even lower as part of the range. As seg suggests maybe a notch to get rid of your 50 Hz power line problem, or good CMR at the diff amp if thats the source, and a LPF. Regards, Dana. |
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谢谢你的回答,
当我使用3放大器或(2 PGA和1运算放大器)的仪表放大器 增益为1200,因为信号在0.5 mV附近,所以在我方信号范围内没有显示EMG信号。 我用差分运算放大器中的0.5%的28增益,PGA为50。 所以帮助我同性恋吧!!!!! 以上来自于百度翻译 以下为原文 thank you for your answer , when i use the instrumentation amplifier with 3 op amp or (2 pga and 1 op amp) and a gain of 1200 because the signal is near of 0.5 mv i see in the scope that i have square signal and no emg signal was displayed i use the 0.5 % of tolérance in the differantial op amp with 28 gain and the PGA was at 50 both so help me gays !!!! |
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你不能在PSoC中使用PGA来做IA(除非你不关心你没有)。
可识别的CMR) 你必须使用外部IA来完成CMR和信号路径G。 HTTP://www. CyPress?COM/?APP=论坛和ID ID=2492和RID=82151 IA CMR分析 问候,Dana。 SBA160A2.ZIP 以上来自于百度翻译 以下为原文 You CANNOT use PGAs in a PSOC to do an IA (unless you do not care you have no appreciable CMR) - You will have to use external IA to accomplish CMR and signal path G. http://www.cypress.com/?app=forum&id=2492&rID=82151 IA CMR Analysis Regards, Dana. ***aa160a2.zip |
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这也是有用的,附上。
问候,Dana。 CMR分析IA1.PDF 170.7 K 以上来自于百度翻译 以下为原文 This is also useful, attached. Regards, Dana.
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感谢dana knight的贡献和宝贵的信息,
现在我想通过使用过滤模块中的蓝牙模块发送数据(ADC Delsig+DMA+过滤器+VDAC) 我该怎么办????? 这就是我所做的 此外,在程序中,我已经集成了UART和删除VDAC,但是我在终端中接收到的不同字符,当我在图形界面中绘制它们时,我看不到我使用VDAC时看到的相同的信号。 邮政编码 1.3 K 以上来自于百度翻译 以下为原文 Thank you dana knight for your contribution and your precious information , Now i want to send the data by using the bluetooth module from the filtring bloc (ADC delsig + DMA + FILTER + VDAC how I can proceed ???? this is what I did Also in the programme i have integrate the UART and deleting the Vdac but what i received in the terminal different character when i plot them in the graphical interface i dindn't see the same signal that i have seen when i was using the Vdac .
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这里有一个线程讨论DUMA到UART。
HTTPS://SeCUR.CyPress?COM/?APP =论坛和ID ID=2233和;RID=111484 关于DMA的一些通用AP注释 HTTP://www. CyPress?COM/?RID=37793 AN51705开始使用DMA HTTP://www. CyPress?COM/?RID=82680 AN848 10 PSoC®3和PSoC 5LP高级DMA主题 HTTP://www. CyPress?COM/?RID=44335 AN6102PSoC®3和使用DMA的PSoC 5LP ADC数据缓冲 在DMA上的HTTP//Vio.CyPress HTTPS://www. Youtube?COM/结果?在DMA上搜索SkyCHQue= DMA+PSoC视频(一些重叠) 问候,Dana。 以上来自于百度翻译 以下为原文 Here is a thread discussing DMA out to a UART - https://secure.cypress.com/?app=forum&id=2233&rID=111484 Some general ap notes on DMA - http://www.cypress.com/?rID=37793 AN52705 Getting Started with DMA http://www.cypress.com/?rID=82680 AN84810 PSoC® 3 and PSoC 5LP Advanced DMA Topics http://www.cypress.com/?rID=44335 AN61102 PSoC® 3 and PSoC 5LP - ADC Data Buffering Using DMA http://video.cypress.com/video-library/search/dma/ Videos on DMA https://www.youtube.com/results?search_query=dma+psoc Videos on DMA (some overlap) Regards, Dana. |
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