Search found 11 matches

by liming
Wed Oct 31, 2018 9:05 am
Forum: BioSemi Software (ActiView executable)
Topic: Sending Frequency of data from TCP/IP
Replies: 7
Views: 15149

Re: Sending Frequency of data from TCP/IP

The TCP_samples/channel is generated in ActiView and linked to the packet size that is used to read the ringbuffer and the minimum step size for scrolling the data on screen. You can change only the value by editing the (open-source) LabVIEW code of ActiView (LabVIEW programming environment require...
by liming
Sat Oct 27, 2018 3:36 pm
Forum: BioSemi Software (ActiView executable)
Topic: Sending Frequency of data from TCP/IP
Replies: 7
Views: 15149

Re: Sending Frequency of data from TCP/IP

I open the ‘Active707-Lores’ using LabVIEW and I find the wiring terminal related to the ‘TCP samples/channel’, but I don't know how to modify the value. So do you know how to modify it?


Regards,
Ming
by liming
Sun Oct 21, 2018 8:06 am
Forum: BioSemi Software (ActiView executable)
Topic: Sending Frequency of data from TCP/IP
Replies: 7
Views: 15149

Re: Sending Frequency of data from TCP/IP

The data is buffered (in the ringbuffer and in ActiView and in the TCP/IP protocol) so the sending rate over TCP/IP fluctuates. Collect 4096 samples in your receive program, and you have exact 2 seconds of data. Best regards, Coen (BioSemi) I have another question. When I select a sampling rate, 'T...
by liming
Tue Oct 16, 2018 2:30 am
Forum: BioSemi Software (ActiView executable)
Topic: Sending Frequency of data from TCP/IP
Replies: 7
Views: 15149

Re: Sending Frequency of data from TCP/IP

Thanks for your help. It solves my problem :D .
by liming
Mon Oct 15, 2018 4:39 am
Forum: BioSemi Software (ActiView executable)
Topic: Sending Frequency of data from TCP/IP
Replies: 7
Views: 15149

Sending Frequency of data from TCP/IP

Dear all, I wrote a C++ program to receive data from ActiView software in two seconds. I set a timer to ensure the time period of my program is precisely two seconds.The sampling rate was 2048 Hz, and TCP samples/channel was 16. So it means that the data sending frequency was 128Hz. However, the num...
by liming
Tue Aug 21, 2018 4:16 pm
Forum: EEG data analysis
Topic: TCP/IP EEG data transform
Replies: 1
Views: 10450

TCP/IP EEG data transform

Dear all, I'm writing a program to receive EEG data from ActiView through TCP/IP communication. Then I convert the 24 bit data into decimal number. But I'm confused about the correspondence between the decimal number and the real-time data shown in ActiView. The maximum amplitude of data shown in Ac...
by liming
Fri Apr 20, 2018 3:03 am
Forum: ECG/EMG data analysis
Topic: offline heart rate extraction from ECG signal
Replies: 13
Views: 34364

Re: offline heart rate extraction from ECG signal

Hi,Coen Your reply is very useful to me.One last question. In the Bipolar Leads display mode, i could see very good ECG diagram like obvious R peaks and stable T wave(row EX7 - EX8).However, in Monopolor Display mode,the diagrams of EX7 and EX8 look like noise(no obvious peaks and troughs).Neverthel...
by liming
Thu Apr 19, 2018 4:22 am
Forum: ECG/EMG data analysis
Topic: offline heart rate extraction from ECG signal
Replies: 13
Views: 34364

Re: offline heart rate extraction from ECG signal

Hi, Coen Thank you for your reply! Now I am using EX7 and EX8 which are placed under my left and right collarbone to acquire ECG data. Reference electrode CMS on my left thumb and DRL on my right thumb, is that connection correct? I used c++ algorithm to get 24bits ECG data from Actiview via TCP/IP....
by liming
Tue Apr 17, 2018 11:57 am
Forum: ECG/EMG data analysis
Topic: offline heart rate extraction from ECG signal
Replies: 13
Views: 34364

Re: offline heart rate extraction from ECG signal

Hi I am using EX8 electrode and CMS,DRL as reference to get my ECG data. However, i had some problem. The ECG diagram is good and R peaks were obvious in Actiview Two but when i receive the voltage data by c++ algorithm ,it seems not so clear,such as -35768, -25674,- 9.25596e+61,3.4825567e+06. As fa...
by liming
Mon Jun 26, 2017 9:05 am
Forum: EEG data analysis
Topic: MatLab code to read BioSemi BDF format data files. (Scholte)
Replies: 1
Views: 13651

MatLab code to read BioSemi BDF format data files. (Scholte)

I download this matlab code but I don't know how to use it to open a BDF file. I wonder if it is possible for you guys to provide me with detailed method to use this code. Best wishes.
by liming
Wed Jun 21, 2017 8:20 am
Forum: BioSemi Software (LabVIEW programming)
Topic: Data analysis
Replies: 0
Views: 13520

Data analysis

Hello,
I want to know how to calculate the data using Hanning function and FFT function in labview.Should I adjust the source code of Actiview software? :shock: