Data acquisition method

A data acquisition and data collector technology, which is applied in the fields of electrical digital data processing, structured data retrieval, special data processing applications, etc., can solve the problems of large workload and maintenance, inconvenient query, etc., and achieve the effect of reducing costs.

Active Publication Date: 2015-04-08
北海恒久天成技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It can be seen from the above description that this method of NI needs to manually establish the CVT variable table, which requires a lot of work and maintenance for large-scale systems; CDL components can be saved to NI’s own file system, which is not suitable for using SQL and other languages query, and it is not convenient to query with other information systems

Method used

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example 1

[0026] A data acquisition method, wherein the data acquisition system is connected with a plurality of data collectors, each of the plurality of data collectors includes a plurality of channels, and the plurality of channels correspond to a plurality of waiting devices of the equipment to be collected. collection volume,

[0027] like figure 1 and figure 2 shown, including the following steps:

[0028] 1) according to the address of each data collector, set up collector table in the database of data collection system, described collector table includes the IP address information of all collectors, each collector is distinguished by IP address;

[0029] 2) According to the collector table, scan the data collector to obtain the channel address and channel number of each channel, and generate a channel table for each collector according to the obtained channel address and channel number, and the channel table includes corresponding data collection The channel address and chan...

example 2

[0040] 1) Establish the collection equipment table of the distributed collection system;

[0041] 2) List the acquisition channels into the data table with the set format through NI tools or other methods, and associate them with the corresponding devices;

[0042] 3) Generate the XML format files of the CVT tables of each acquisition device respectively according to the CVT data format;

[0043] 4) Query the data table to generate the total CVT table when the LABVIEW system is loaded;

[0044] 5) Establish communication with each device through the CCC component, and update the total CVT table;

[0045] 6) Establish a permanent process, read the total CVT table according to the set time, and store the corresponding latest value in the data table according to the entry name;

[0046] 7) Other data presentation programs or related information integration systems read the corresponding data in the data table to realize query statistics and information integration.

example 3

[0048] The distributed system is CRIO9074, with a total of 8 slots, each with eight slots, four 32-channel temperature, four 16-channel analog, 192 channels per module, 1536 channels in total, and a device table needs to be defined to The IP address is distinguished, and then the channel table of each device is listed through the channel function to generate the device IO table. According to the device IO table and the device table, an XML variable file named after the device name is generated and sent to each CRIO, and each CRIO is loaded at startup. Variable file, LABVIEW program initializes the total CVT variable from the IO table at startup, reads the channel value of the sub-equipment regularly through CCC, and saves it to the corresponding SQL SERVER value table according to the set time, and queries the statistics program and other information system programs Access to the SQL SERVER value table allows access to current and historical collection values.

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Abstract

The invention discloses a data acquisition method. A data acquisition system is connected with a plurality of data acquisition devices, each data acquisition device comprises a plurality of channels, and the channels correspond to a plurality of values to be acquired of devices to be acquired. The data acquisition method comprises the following steps that (1) an acquisition device list is established in a database; (2) a channel list is generated for each acquisition device; (3) a total acquisition list is initialized; (4) variable files in the XML format are generated according to the channel lists, and are issued to the corresponding data acquisition devices; (5) each data acquisition device acquires data of the corresponding device to be acquired through the corresponding channel, and branch acquisition lists are generated; (6) all the branch acquisition lists are sent to the data acquisition system in an unified mode, and the acquired values are written into the total acquisition list; (7) the channels are scanned regularly to obtain the acquired values, each branch acquisition list is updated, and then the total acquisition list is updated. According to the data acquisition method, an existing mode that variable names are edited manually is replaced by the mode of automatic management and addition, and the cost of system establishment and maintenance is reduced.

Description

technical field [0001] The invention relates to the field of data collection, in particular to a data collection method. Background technique [0002] The use of CVT format files is a way to collect data between NI CRIO terminals or PXI terminals and Labview workstations. This method is efficient and fast, and is suitable for large-capacity data communication and large-scale data acquisition systems. NI provides The solution based on file storage, that is, manually edit the file conforming to the CVT format, the distributed terminal and the Labview terminal load the same file at the same time, and the terminal scans its own IO at a fixed rate, and updates its own CVT table, and then sends it to the Labview workstation, Labview workstation maintains a large CVT table, saves the CVT value collected from each workstation. National Instruments also provides a CDL component for saving CVT values ​​to a local data file. [0003] It can be seen from the above description that thi...

Claims

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Application Information

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IPC IPC(8): G06F17/30
CPCG06F16/21
Inventor 李春林
Owner 北海恒久天成技术开发有限公司
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