LabVIEW is a powerful development environment that uses a graphical programming language, offering many similarities to traditional text-based programming languages. It supports similar data types, control structures, and debugging tools. However, the key difference lies in its visual approach—instead of writing code, users build programs using icons, block diagrams, and wiring. This makes LabVIEW particularly user-friendly, especially for those who prefer a more intuitive, visual method of programming.
One of LabVIEW's major strengths is its ease of use and strong capabilities in data visualization and instrument control. It also provides a rich set of functions for file manipulation, allowing users to easily read and write various file formats such as text, binary, and data report files. When working with serial communication, for example, data obtained from VISARead must often be converted into table format before saving. The process typically involves two stages: first, displaying the data on the main interface with timestamps for real-time monitoring, and second, saving the data to an Excel file for later analysis or printing. If real-time display is not required, the data can also be saved directly to a .txt file, which can be opened in Excel.
The design of the data display module takes real-time performance into account. Each data frame is associated with a specific time, and users can set the time interval for both display and storage. Figure 1 shows a dynamic data table generated by a subVI. Considering the frequency of serial port reads, two scenarios are possible: either the host computer periodically reads the serial port, ensuring regular data updates, or it reads the port non-periodically, displaying data only when it arrives.
For periodic reading, the program includes a ComboBox control within a While Loop, allowing users to select different save intervals. As shown in Figure 2, the incoming serial data is processed through StringSubset, then merged and formatted into a table. This ensures that data is stored at regular intervals, such as every 3 seconds. In contrast, for non-periodic reading, the ComboBox can be removed, and a Case structure can be used to check if data is available before displaying it.
Each test parameter is connected to a WaveformChart, enabling real-time visualization of trends. This allows users to quickly assess whether test conditions meet requirements.
To save the form data displayed on the main program interface, a "Save Data" button (of Boolean type) is used. When enabled, all real-time data is saved to a specified file. This selective saving mechanism gives users full control over data retention. A similar example exists in the LabVIEW 7.1 help documentation, where the Table is replaced with the desired output, and row and column headers are included for clarity. This ensures that the saved file retains all necessary information for post-processing and analysis.
UL RHW-2
UL RHW-2,Lines for Construction,UL Certified Cable, Industrial Cables Wire
Jiangyin City Weicheng Special Cable Co.,Ltd , https://www.weichengcable.com