技术与服务热线:400 820 0372

中国CN  

How can I Read and Access the Data of a DL850 FLD File?

The DL850 FLD file extension contains the acquired waveform data in IEEE 32-bit floating point format. You can analyze the floating point format using the low-level file I/O commands in MATLAB. FLD file format contains only the raw measurement values and does not contain any of the header information such as channel count, sample rate, timestamps, date, etc. 
 
The commands to open and read an FLD file in MATLAB is:
  • fileID = fopen('filename');
    include the single quotation marks
  • A = fread( fileID, inf, 'float');

The format and size of the data values in an FLD file is a float precision and 32-bits (8 bytes) respectively. Data values are stored in an M-by-N matrix, where M is the number of acquired data points and N is 1. In the Workspace Window, you can open the matrix A to view all the measurement values. Each data value is stored in a new row in the MxN matrix. If multiple channel or sub-channel waveforms are stored, the waveforms are not stored in a new column, instead it is appended to a new row at the end of the list.

For example, if 1 channel is saved with a record length of 10k then the FLD data will be in a 10010x1 matrix. If 2 channels are recorded with a record length of 10k, the file will be a 20020x1 matrix where the first data point of channel 2 begins at row 10011. 

In addition, the DL850 can save waveform data to a ASCII MATLAB type format. When the Waveform Save -> Data Type is in ASCII, you can select either the csv or MATLAB extension. Please note that the MATLAB extension is simply .TXT, a text file not the MATLAB .M. The only difference between an FLD and MATLAB .TXT file is the file size and header information. FLD file size is significantly smaller than a TXT file, since only the measurement values is saved for FLD files.
The MATLAB TXT file extension can be accessed using typical text file commands such as fileread, csvread, csvwrite, etc.

相关产品和解决方案

数据采集设备

Yokogawa数据采集系统具备出众的灵活性和性能,能测量、显示、存储甚至促动各种物理和电气现象。

波形测量仪器

Yokogawa提供世界一流的数字示波记录仪:数字示波记录仪具有高速采样能力和大测量带宽,可用于设计和开发电子设备。示波记录仪集数字示波器和多通道数据记录仪的优点于一身。

示波器应用软件

使用Yokogawa的示波器应用软件查看、导出、分析和管理数据。

示波记录仪

我们的示波记录仪是灵活、强大的多通道测试和测量解决方案,将高精度示波器和传统有纸图表记录仪的优点集于一身。Yokogawa的示波记录仪除了能在它的大显示屏上显示信号之外,还可以将信号保存到记录纸和/或存储介质中以便长期储存(如30天或更长),此外它还可以捕捉并分析非常快的瞬变信号。

高速数据采集器和数采仪

Yokogawa高速数据采集系统提供业界领先的隔离、位分辨率、采样速率和存储长度,带有独立的通道硬件和使用简单的软件。是示波记录仪中最领先的技术。

返回顶部
WeChat QR Code
微信扫一扫
获得更多专业服务