D/A data acquisition and analysis method based on remote frequency spectrograph communication

文档序号：1566494 发布日期：2020-01-24 浏览：7次中文

阅读说明：本技术 基于远程频谱仪通信的d/a数据采集分析方法 (D/A data acquisition and analysis method based on remote frequency spectrograph communication ) 是由李继秀孟真田易刘谋钟燕清张兴成阎跃鹏于 2019-10-29 设计创作，主要内容包括：本发明提供一种基于远程频谱仪通信的D/A数据采集分析方法,包括：采用上位机对嵌入式设备和频谱仪进行参数设置；所述嵌入式设备依据所述上位机设置的参数产生模拟信号并发送给频谱仪；所述上位机控制所述频谱仪在线采集所述模拟信号并进行分析。本发明基于远程频谱仪通信的D/A数据采集分析方法中,上位机通过与频谱仪进行通讯并控制频谱仪进行信号采集及在线数据分析,从而实现对产生的模拟信号的性能指标科学定量直观的测试和界面化显示。(The invention provides a D/A data acquisition and analysis method based on remote spectrometer communication, which comprises the following steps: setting parameters of the embedded equipment and the spectrometer by using an upper computer; the embedded equipment generates an analog signal according to the parameters set by the upper computer and sends the analog signal to the frequency spectrograph; and the upper computer controls the frequency spectrograph to collect and analyze the analog signals on line. In the D/A data acquisition and analysis method based on remote spectrometer communication, the upper computer communicates with the spectrometer and controls the spectrometer to acquire signals and analyze data on line, so that scientific, quantitative and visual testing and interface display of performance indexes of generated analog signals are realized.)

1. A D/A data acquisition and analysis method based on remote spectrometer communication is characterized by comprising the following steps: the method comprises the following steps:

setting parameters of the embedded equipment and the spectrometer by using an upper computer;

the embedded equipment generates an analog signal according to the parameters set by the upper computer and sends the analog signal to the frequency spectrograph;

and the upper computer controls the frequency spectrograph to collect and analyze the analog signals on line.

2. The remote spectrometer communication-based D/a data acquisition and analysis method as claimed in claim 1, wherein: and the parameters set for the embedded equipment by adopting the upper computer comprise frequency points and/or amplitudes.

3. The remote spectrometer communication-based D/a data acquisition and analysis method as claimed in claim 1, wherein: and the upper computer calls MATLAB to set parameters of the frequency spectrograph through Windows platform application program development software.

4. The remote spectrometer communication-based D/a data acquisition and analysis method of claim 3, wherein: the parameters set by the MATLAB to the spectrometer include one or more of the starting frequency, resolution, and level for that frequency or level.

5. The remote spectrometer communication-based D/a data acquisition and analysis method of claim 3, wherein: the MATLAB connection spectrometer process comprises:

the MATLAB establishes an m file, and a directory package where the m file is located

VISA _ instrument.m library file;

the MATLAB establishes connection with the frequency spectrograph and accesses a serial number of the frequency spectrograph;

initializing the frequency spectrograph by the MATLAB and setting parameters;

the MATLAB starts scanning the frequency spectrograph, and obtains scanning point power and converts the scanning point power into ASCii code values;

and the MATLAB calculates SNR and SFDR by using the ASCii code value of the scanning point power conversion, and acquires and stores a frequency spectrum picture of the spectrometer.

6. The remote spectrometer communication-based D/a data acquisition and analysis method as claimed in claim 1, wherein: the upper computer accesses an IO library VISA of the frequency spectrograph through VXI-11Protocol based on a TCP/IP communication Protocol.

7. The remote spectrometer communication-based D/a data acquisition and analysis method as claimed in claim 1, wherein: the communication of the upper computer accessing the VISA is based on an information synchronization mode, and the command architecture of the communication is short for Simple Commands for Programmable Instruments (SCPI).

8. The remote spectrometer communication-based D/a data acquisition and analysis method as claimed in claim 1, wherein: the embedded device sends the D/A data to the frequency spectrograph through a special data cable.

9. The remote spectrometer communication-based D/a data acquisition and analysis method as claimed in claim 1, wherein: the host is in communication connection with the frequency spectrograph through a network cable.

Technical Field

The invention relates to an analog signal online analysis technology, in particular to a D/A data acquisition and analysis method based on remote spectrometer communication.

Background

At present, data acquisition and analysis based on digital signals are performed, and performance analysis of analog signals can be performed only by means of manual setting and observation of external tools such as a frequency spectrograph, or by means of hardware and an additional A/D converter to generate digital signals, so that data acquisition and subsequent analysis are performed. This is not conducive to the realization of automated testing of analog signals, particularly for batch products, in real applications, and it is also difficult to directly quantify some performance indicators of analog signals in the products for evaluation and testing.

Disclosure of Invention

The D/A data acquisition and analysis method based on the remote spectrometer communication provided by the invention realizes the on-line quantitative evaluation and test of the analog signal.

The invention provides a D/A data acquisition and analysis method based on remote spectrometer communication, which comprises the following steps:

setting parameters of the embedded equipment and the spectrometer by using an upper computer;

the embedded equipment generates an analog signal according to the parameters set by the upper computer and sends the analog signal to the frequency spectrograph;

and the upper computer controls the frequency spectrograph to collect and analyze the analog signals on line.

Optionally, the parameters set for the embedded device by the upper computer include frequency points and/or amplitudes.

Optionally, the upper computer calls MATLAB to set the parameters of the spectrometer through Windows platform application program development software.

Optionally, the parameter set by the MATLAB on the spectrometer includes one or more of a start frequency, a resolution, a signal frequency, or a level.

Optionally, the MATLAB-connected spectrometer process includes:

the MATLAB establishes an m file, and a directory package VISA _ INSTRUMENT.M library file where the m file is located;

the MATLAB establishes connection with the frequency spectrograph and accesses a serial number of the frequency spectrograph;

initializing the frequency spectrograph by the MATLAB and setting parameters;

the MATLAB starts scanning the frequency spectrograph, and obtains scanning point power and converts the scanning point power into ASCii code values;

and the MATLAB calculates SNR and SFDR by using the ASCii code value of the scanning point power conversion, and acquires and stores a frequency spectrum picture of the spectrometer.

Optionally, the upper computer accesses an IO library VISA of the spectrometer through VXI-11Protocol based on a TCP/IP communication Protocol.

Optionally, the communication of the upper computer accessing the VISA is based on an information synchronization mode, and a command architecture of the communication is short for Simple Commands for Programmable Instruments (SCPI).

Optionally, the embedded device sends the D/a data to the spectrometer over a dedicated data cable.

Optionally, the host is in communication connection with the frequency spectrograph through a network cable.

In the D/A data acquisition and analysis method based on remote spectrometer communication, the upper computer communicates with the spectrometer and controls the spectrometer to acquire signals and analyze data on line, so that scientific, quantitative and visual testing and interface display of performance indexes of generated analog signals are realized.

Drawings

FIG. 1 is a block connection diagram of an upper computer, an embedded device and a frequency spectrograph in the remote frequency spectrograph communication-based D/A data acquisition and analysis method of the invention;

FIG. 2 is a diagram of the working flow of the method for collecting and analyzing D/A data based on remote spectrometer communication according to the present invention, in which the upper computer software calls MATLAB;

FIG. 3 is a flow chart of the MATLAB remote spectrometer communication work flow in the remote spectrometer communication-based D/A data acquisition and analysis method of the present invention;

fig. 4 is a display interface of the spectrometer captured in the D/a data acquisition and analysis method based on remote spectrometer communication according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, the present embodiment provides a D/a data acquisition and analysis method based on remote spectrometer communication, the method including:

setting parameters of the embedded equipment and the spectrometer by using an upper computer;

optionally, the upper computer sets the frequency point, the amplitude and the like of the embedded device through the serial port, and after the setting is successful, the embedded device sends an effective analog signal to the frequency spectrograph;

optionally, the upper computer remote frequency spectrograph communication is remote communication to the frequency spectrograph by invoking MATLAB through Windows platform application development software, where the remote communication includes: the MATLAB call is initialized, and parameters are set as follows: the method comprises the following steps of (1) calling MATLAB to be remotely connected with a frequency spectrograph at an initial frequency, a resolution, a signal frequency, a level and the like;