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Questions tagged [data-acquisition]

Data acquisition deals with accessing, collecting, configuring and controlling external hardware such as sensors, computer ports, various instruments and measurement devices for the purpose of data synchronization, storage or further analysis.

Data acquisition (DAQ) deals with accessing, collecting, configuring and controlling external hardware such as sensors, computer ports, various electronic instruments and measurement devices for the purpose of synchronization, storage or further analysis.

Though there ere are several platforms specializing in DAQ such as Labview, and Matlab's DAQ toolbox, practically any programming language have access to the hardware level from which data can be gathered.

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Pandas with sampled data (engineering)

I am new to Pandas. I see it is useful for time series data but only when the sampled interval is a standard unit (eg., minutes, hours, days). What if I have data sampled at much faster but unusual rates such as data acquisition? eg. 512 Hz (sample…
Andrew Walsh
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Should I keep a file handler open between append writes?

I am working in a project involving data acquisition. One very important requisite is described like this: At the beginning of the recording, a file must be created, and its headers must be written; As soon as the data-acquisition starts, the…
heltonbiker
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Adlink PCI-7250 eventcallback

I just wrote a simple C# to get an eventcallback from PCI-7250 (Data Acquisition Card) when any of the digital inputs go high. Here is my code: public delegate void ReadDelegate(uint value) public void Form1_Load(object sender, EventArgs e) { …
user726720
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MEX-File to Output Pulse in a Loop to a DAQ-Board

i figured I must use a MEX-File to output Digital pulses in a loop (40 kHz) from Matlab to my DAQ-Board, I have some APIs from the DAQ-Board vendor, but I really dont know if they are useful. It´s a big documentation on the Mathworks website about…
Amin
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Matlab Data Acquisition, PCI card incorrectly detected as a PXI Chassis card

In Matlab 2014b,2014a,2013b,2013a (not using simulink) Windows7 64-bit session based data acquisition toolbox Using NI-DAQmx 14.1 and NI-DAQmx 14.0 I have a PCI card that is being incorrectly detected as being present in a PXI chassis. This causes…
St-Ste-Ste-Stephen
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C# Break point, selection of frame kinect v2

I m using the sdk 2, sample face basic.(C# programming) I would like to insert a breakpoint or flow only a predefinite number of frame, or use a predefinite frame as image for analyze it. Where and how can I get in the code to do this? I am in…
Skipper
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PyVISA missing methods

I am running Win 7 x64, NI 488.2, PyVISA 1.5, and python with numpy/scipy/ipython. I am attempting to contact a Keithley instrument through a GPIB-USB connection and send simple commands. However, when I attempt to create the instrument object, I…
Steve R
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receive wireless data through laptop network card in matlab

i am doing a project in which i have to acquire the wireless signal transmitted through wifi/router. But the signal acquisition has to be done in MATLAB, for doing frequency operations. Can anyone give me some useful link or some MATLAB guideline…
user7526
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Ethernet Endpoints, Frames and Triggers

We are designing a point-to-point ring Ethernet network for a data acquisition system. Due to physical system constraints, star/mesh networks are out of the question. For data transmission to a host, we are using point-to-point links to daisy chain…
user2286899
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data acquisition systems

what is meant by instrument resolution and precision and how they are calculated
mohammed
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High speed data acquisiton using REST Services

We need to develop a high speed REST based WCF Service , which will be used for updating 2000 datapoint , each data point changing at 25 msec . Is it possible to implement such high speed data acquisition using WCF
Sabarish Sathasivan
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Script to crawl through different pages and acquire data

I am planning to do a network analysis of bmtc bus connectivity network... So i need to acquire data regarding bus routes. The best website as far as i know is http://www.narasimhadatta.info/bmtc_query.html Under the "search by route " option the…
Chandrashekar Kuyyamudi
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Getting matrix of data from LabVIEW into C# .NET

I am running a simultaneous data acquisition and hardware control. The data acquisition is with an NI-DAQmx device. The hardware control is already written in C#.NET and we would like to synchronize our acquisition with the control, i.e. wait for…
Diggy Doggit
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Atalasoft DotImage Licensing

I have been trying to find decent Image Acquisition + Image Processing solution at a bargain price. I have looked at names like Kodak, Global360, Iris. What I found with all these vendors is that they are very, very, very expensive. I have also…
Koekiebox
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Long term instrument data acquisition with Python - Using "While" loops and threaded processes

I will have 4 hardware data acquisition units connected to a single control PC over a hard-wired Ethernet LAN. The coding for this application will reside on the PC and is entirely Python-based. Each data acquisition unit is identically configured…
Red Spanner
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