Realization of Remote Data Acquisition Based on C / S Structure in LabVIEW

Realization of Remote Data Acquisition Based on C / S Structure in LabVIEW

Introduce the method and characteristics of using Remote Panels technology, RDA technology, TCP technology and DataSocket technology to realize remote data acquisition (Remote DAQ) based on C / S structure in LabVIEW environment. Application provides a solution.
Keywords: remote data acquisition; Remote Panels; RDA; TCP; DataSock et; LabVIEW; virtual instrument?

Method one, software operation interface sharing method, use Remote Panels technology to realize remote data collection [1]; method two, DAQ equipment sharing method, adopt RDA technology to realize remote control of DAQ equipment [2]; method three, data release method, use TCP technology realizes remote data collection [1]; method four, data sharing method, using DataSocket technology to achieve remote data collection [1]. Either way, the system consists of a client and a server connected through a network. The DAQ device is installed on the server, and the client controls the DAQ device on the server to complete data collection through the network. The system composition is shown in Figure 1.
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The first step is to start the LabVIEW Web Server service on the LabVIEW Web Server computer:?
Before the client uses Remote Panels, you must first run LabVIEW on the Server computer, and use the LabVIEW OpTIons configuration dialog box to configure the Web Server file path and network parameters, client access rights, and VIs access rights. In order to provide web browser access, you must use the Web Publish Tool to publish web pages when configuring the server.
The second step is to connect and run Remote Panels on the client computer. There are two ways to operate Remote Panels:
Method 1: Use the Connect to Remote Panels tool in the LabVIEW environment to directly operate Remote Panels.
Method 2: Use the web browser to directly operate Remote Panels in the web page. If you enter the URL of the server in the address bar of the web browser of the client, you can directly operate Remote Panels in the web page. In the local area network, the format of the URL is: http: //PcName:Port/ViName.htm; on the Internet, the format of the URL is: http: // IpAddr: Port / ViName.htm. When Remote Panels appears on the browser, you can get control of Remote Panels by right-clicking the drop-down menu. It is not necessary to install LabVIEW to operate Remote Panels with a web browser, just install a LabVIEW Run? TIme Engine. Figure 2 shows the front panel of a virtual instrument on the server opened in the IE browser.
LabVIEW Remote Panels can not only be viewed, but can also be controlled in the LabVIEW environment or on the browser. This powerful feature allows developers to easily create remote applications, allowing users to sit in front of the computer at home on weekends to easily monitor various situations in the office, laboratory or even on the production line. The disadvantage of this method is that the test data is not available on the client.
RDA programming is exactly the same as using the native DAQ device. The steps of using RDA technology to realize remote data acquisition in LabVIEW are as follows:
The first step is to configure the RDA server. RDA server needs to install NI-DAQ6.0 (or higher version) and DAQ equipment, set the server's IP address, such as 192.168.0.1, and its subnet mask is 255.255.255.0. Then start the Remote Device Access Server on the server. If necessary, you can set the RDA access password in the properties dialog box of the DAQ device.
The second step is to set up the client. The RDA client should install the same version of NI-DAQ as the server, otherwise the DAQ device will not be able to connect. Set the client's IP address, such as 192.168.0.2, and its subnet mask is 255.255.255.0. The setting of the RDA client is more complicated, usually follow the steps below:
â–  Select "Create New" in the right-click pop-up menu of the Devices and Interfaces item in the left-side directory tree of the client's MAX (Measurement & Automation Explorer), and select RDA / Ethernet Device in the Create New window. â–  Enter the server's IP address or computer name in the Select Remote Computer dialog box that appears. â–  Set the device number in the System dialog box that appears. If the DAQ device on the server is set with an RDA access password, you must enter the correct password in the Password field.
At this point, the RDA device on the client is added, and the RDA device will appear in the tree on the left side of the client's MAX. From then on, the user can operate the device as if it were locally. Write DAQ software directly on the client to realize remote data collection.
The block diagram of the server-side software is shown in Figure 4, and the front panel and block diagram of the client-side software are shown in Figure 5.


In the LabVIEW version above LabVIEW6i, all controls have added a special property called DataSocket ConnecTIon. With this property, DataSocket communication between two or more corresponding controls of the same category on different computers can be achieved.
You can set the DataSocket URL address of the control in the configuration dialog box of the control's DataSocket Connection properties. The address format is as follows: dstp: // servername / dataname, for example: dstp: // lht / wave. If you set the same DataSocket ConnectionURL address for two LabVIEW controls of the same type on both computers (for example, both are dstp: // lht / wave), and the connection type (Connection Type) is set to Publish and Subscribe, these two The two controls are connected by DataSocket. The values ​​of the two controls will be completely synchronized, one of the controls will change, and the other will also change the same.
Using this feature of DataSocket, you can achieve remote data collection: use server-side software to control DAQ equipment to complete data collection, put the test data into an array control, and use the same array control in the client-side software to receive through DataSocket Server These data, and then carry out relevant processing on these data through further programming. This method actually uses DataSocket's data sharing to obtain server-side data.
Compared with the third method, the fourth method does not need to specifically write a program for sending and receiving data, but requires the installation of an additional DataSocket Server software on the server and client.
Remote Panels technology allows users to directly operate the DAQ software on the server through the IE browser through a shared software interface, which is suitable for on-site monitoring on the client. RDA technology makes it possible for users to directly control remote DAQ devices on the network by sharing hardware. TCP technology realizes data release and transmission through programming. Programming is slightly more complicated, but flexible. DataSocket technology transmits measurement and control parameters through data sharing. It is a simple and easy-to-use data transmission method. Its biggest feature is the release of high-speed real-time data. The above four technologies have their own advantages and disadvantages. Users can flexibly use these technologies to build powerful remote virtual instruments according to their respective characteristics.
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In order to meet the high-precision data collection under certain harsh experimental environment conditions. Mass storage for later analysis needs, designed with MSP430F ...

Posted at 2013-06-08 14:51 • 754 views
High-precision mass data collection and storage system based on single chip microcomputer
Design and Research of Data Acquisition and Control System Based on Communication between Microcontroller and PC

In the process of industrial control, the real-time data of the controlled object needs to be collected, and according to the actual situation of the collected data, it is monitored in real time ...

Posted at 2013-06-08 14:16 • 1605 times read
Design and Research of Data Acquisition and Control System Based on Communication between Microcontroller and PC
Hardware Design of Intelligent Data Acquisition Terminal of Hydraulic System Based on ARM

According to the characteristics of the hydraulic system, an intelligent data acquisition terminal system based on ARM is designed. The system uses sensors to measure oil pressure, flow and temperature 3 ...

Posted at 2013-05-16 13:55 • 1063 views
Hardware Design of Intelligent Data Acquisition Terminal of Hydraulic System Based on ARM
Petroleum pipe composite based on NI PXI Express platform ...

Petroleum pipe composite squeezing test machine is used to apply axial load (tensile or compression), lateral bending, external pressure and internal pressure to the tubing and casing.

Posted at 2013-03-26 13:55 • 343 times read
Petroleum pipe composite based on NI PXI Express platform ...
Prospects for the main trends of data collection technology in 2013

"Data Acquisition Technology Trend Outlook" introduces the following trends, massive analog data â„¢ and data acquisition, the role of Moore's Law in data recording systems, new ...

Posted at 2013-03-20 13:48 • 563 times read
Prospects for the main trends of data collection technology in 2013
How to use ADC technology for data acquisition in MCU system

Embedded system designers and MCU manufacturers care about the three basic functions of the data acquisition system: capture, calculation, and communication. Understanding all functions is great for design ...

Posted at 2013-03-07 15:24 • 3393 times read
How to use ADC technology for data acquisition in MCU system
Low-cost, 16-bit, 250KSPS, 8-channel isolated data mining ...

The circuit shown is a cost-effective, highly integrated 16-bit, 250 kSPS, 8-channel data acquisition system that can handle ± 10 V industrial grade signals ...

Posted at 2013-01-11 17:03 • 1643 views
Low-cost, 16-bit, 250KSPS, 8-channel isolated data mining ...
ADI Lab Circuit: Ultra Low Power Data Acquisition System

The circuit is an ultra-low power data acquisition system, using AD7091R 12-bit, 1 MSPS SAR ADC and AD80 ...

Posted at 2013-01-11 14:11 • 652 views
ADI Lab Circuit: Ultra Low Power Data Acquisition System
Realization of Monitoring System for 89S52 Single Chip Computer Detecting and Controlling Temperature

The author uses D1S18B20 to collect digital signals, through Bluetooth wireless communication technology and USB interface technology. Implemented by 89S52 single chip microcomputer ...

Published on 2013-01-09 10:07 • 1772 views
Realization of Monitoring System for 89S52 Single Chip Computer Detecting and Controlling Temperature
Design large-capacity data acquisition system based on FPGA software and hardware

This article introduces the interface design of FPGA and CF card from the perspective of hardware and software, and gives the programming of accessing the CF card with dual RAM.

Posted at 2013-01-07 09:24 • 587 times read
Design large-capacity data acquisition system based on FPGA software and hardware
Use S3C2410 to solve the three major problems of network car anti-theft system

The popularization of cars has brought convenience to people's lives, and it also poses a big problem for people-car theft prevention. This design is to solve the past car anti ...

Posted on 2013-01-07 08:54 • 626 views
Use S3C2410 to solve the three major problems of network car anti-theft system
Avionics automatic test system? Hand it over to the virtual instrument!

Compared with GPIB, VXI, RS232 and other instruments, PXI modular instruments have the advantages of fast speed, small size and easy expansion, so ...

Posted at 2013-01-06 16:38 • 1045 views
Avionics automatic test system? Hand it over to the virtual instrument!
The design and acquisition of space electric field signal acquisition system based on Xilinx FPGA ...

The FPGA-based space electric field signal acquisition system proposed in this paper is applied to the sounding rocket payload-the signal acquisition and processing of the back end of the probe of the electric field instrument on the arrow ...

Posted at 2012-12-27 11:39 • 1605 times read
The design and acquisition of space electric field signal acquisition system based on Xilinx FPGA ...
Cloud computing bursts, Huawei wins bid for China Telecom Tianyi

Huawei recently announced that it won the bid for China Telecom's 2012 cloud computing-related centralized procurement project, including server virtualization software, cloud desktop system ...

Posted on 2012-12-21 09:10 • 486 views
Cloud computing bursts, Huawei wins bid for China Telecom Tianyi
Design principle and application scheme of displacement test system

Displacement testing technology has a wide range of applications in industrial production. Displacement detection is the basis of mechanical quantity detection. Converting mechanical quantity into displacement to detect is electromechanical ...

Published on 11:30 2012-11-21 • 1444 views
Design principle and application scheme of displacement test system
High-tech electronic new technology, new product intensive release

For the first time, the 14th Hi-Tech Fair opened a special venue to provide a platform for exhibitors to hold new technology and new product information release activities. From the morning of November 17 ...

Posted at 2012-11-20 10:10 • 300 views
High-tech electronic new technology, new product intensive release
Processing method of burr in data collection

When collecting a set of parallel interface signals, it was found that the received data was very unstable. Measure several control

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