DAQ System Architecture
Hello,
I am confused about deciding design structure for a daq system. I would like to share my doubts and idea about the DAq system which I have been developing.
In the system, the hardware consists of vti ex1266 mainframe and multiplexers. There is test room and test room is divided in 6 stations. Each room has own daq system. Daq system will have a user interface, daq unit, log and display. User interface will decide to channels which is going to be scanned. Also, it will have buttons and some parameters (like combobox , string control) to form the test name. Finally , it looks like I have 4 main units. So, what design structure should I prefer here?
Queue based ? State machines ? or what ? I wonder what do you think ? what will be the best solution for the software design ?
"You live in a graphical world. Why not program in one?"
Use TestStand. Most of the structure is already done for you.
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Environment:SUN Solris 10
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Due to H/W failure one of our RAC node(prod1) got formatted.
We have deleted the node(prod1) from RAC successfully.
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Regards
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Hello,
I like to get your suggestion in setting up the DAQ system. I am very beginner in this issue.
These SCXI listed below are what we have in the laboratory. I will use DAQ card 6062E.
SCXI 1000
SCXI 1520
SCXI 1140
SCXI 1142
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SCXI 1122
SCXI 1100
I will use linear position sensor in my experiment. But I'm not sure which SCXI shoud I connect to this sensor.
This sensor gives 4-20mA output. it requires +13 to +28Vdc excitation.
I will use pressure transducer (strain gauge type) which gives 100mV output and requires 10Vdc supply.
I will use strain gauges 350 ohm.
Regarding to the number of channels used in my experiment, I will use 1 channel of pressure transducer, 1 channel of linear position sensor and 3 or 4 strain gauges.
Could you please suggest me which SCXI should be used with pressure transducer, linear position sensor and strain gauges.
Now I'm thinking to use SCXI 1520 with strain gauges and pressure transducer. Is that ok?
But I'm not so sure on the linear position sensor which gives current output.
And regarding to sampling rate, I like to get minimum of 60-70 KS/s for pressure transducer. And around 1KS/s for linear position sensor and 1KS/s for each channel of strain gauge are enough. Can I archieve these sampling rate from the available SCXI modules mentioned before? I attached the datasheet of pressure transducer and linear position sensor for you. Please see attached files.
I'm reallly look forward for your suggestion.
Thank you in advance,
Ganchai.
Attachments:
XPM6_mini. pr. transducer.pdf 115 KB
linear-position-sensor.pdf 1683 KBHi Ganchai,
I would recommend the 1520 with a 1314 terminal block for connecting your pressure transducer and strain gauge. It is designed for excitation, bridge completion and has many other features to fit these applications. For your linear position sensor, try using the 1100 module with an additional precision shunt resistor. For example, our 1308 terminal block has built in 249Ohm shunt resistors for taking current inputs for your 1100. These connections should give you the readings you would like.
As far as sampling rate goes, you should be fine with your requirements. Good luck and I hope you are succesful.
PBear
NI RF -
3-tier vs. 2-tier system architecture (DEV- QAS- PRD)
Dear Xperts,
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Thx.
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2 Tier architecture will have Presentation Layer and DataBase Layer. So each and every time we have to access the Database directly and this may affect the DB Performance and if the number of concurrent users are more then it will be worser.
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Hello,
Currently such a document is not available. That said, you can use the Ravebrook tool to check the DB documentation [1] or check the API documentation to get an idea of what the components are [2]. Not the best solution, but something that is workable I guess.
is there a specific need for this? Would suggest that you mail the bugzilla mailing list as they may be more helpful[3]
#[http://www.ravenbrook.com/tool/bugzilla-schema/ Bugzilla DB schema]
#[http://www.bugzilla.org/docs/4.4/en/html/api/ Bugzilla API docs]
#[https://groups.google.com/forum/#!forum/mozilla.support.bugzilla Google groups for bugzilla]
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Greetings everyone,
I have a signal conditioning application and I have been looking at the Compact DAQ Platform as a solution.
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Thomasalkaline3mc wrote:
NI, the home of dead links....
You probably noticed that these posts were written 9 years ago...
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Thank you.Hi - you should find what you are looking for here:
http://service.sap.com/~form/sapnet?_SHORTKEY=01100035870000660282&_SCENARIO=01100035870000000202&
Requires login to the SAP Service Marketplace
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I'm trying to figure out the current system architecture of a potiential client.
All I know is that they're running a JSP web application on Apache Tomcat against a MySQL database.
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2. Is it true they could be using an application server as well as Apache Tomcat?
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Todd1. If they're running Apache Tomcat does this mean
they are not using EJB?According to your information, it seems that they are not using EJBs. Tomcat does not handle that part of the J2EE specification.
2. Is it true they could be using an application
server as well as Apache Tomcat?A "full" J2EE application server would furnish the same functionality.
3. What is the best possible system architecture if
running only Apache Tomcat against an MySQL database?JSP, servlets, and POJC (Plain Ol' Java Classes). Possibly a Singleton or two to act as database "handlers" for connection pooling, etc.
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understand the best possible JSP design without using
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I have a DAQ system that crashes frequently. So far the pattern indicates that this is caused by another piece of being turned on, but the problem is erratic. I have been unable to prove that something else is causing the problem. I have attached a Word document with the latest sequence of events.
Duplicate question already answered here.
Robert Mortensen
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Basics of PXI system architecture
Hi
Can anyone suggest some links wher i would have the information about the PXI systems, its bus architecture and how this is useful in instrumentation.Hi Gops,
This links should give you a good starting point:
http://www.ni.com/swf/pxi/us/launch.htm
http://volt.ni.com/niwc/common.jsp?page=pxi_what_is&node=1525
http://volt.ni.com/niwc/common.jsp?page=pxi_right_choice&node=1525&node=1525
Regards,
Luca
Regards,
Luca
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