CN110580845A - A Virtual Instrument Embedded in the Comprehensive Teaching Experiment Platform - Google Patents

A Virtual Instrument Embedded in the Comprehensive Teaching Experiment Platform Download PDF

Info

Publication number
CN110580845A
CN110580845A CN201910997067.XA CN201910997067A CN110580845A CN 110580845 A CN110580845 A CN 110580845A CN 201910997067 A CN201910997067 A CN 201910997067A CN 110580845 A CN110580845 A CN 110580845A
Authority
CN
China
Prior art keywords
circuit
analog
power supply
virtual instrument
measurement function
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910997067.XA
Other languages
Chinese (zh)
Inventor
陈晓明
宁成军
闫超
高宝平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xi'an And Electronic Technology Co Ltd
Original Assignee
Xi'an And Electronic Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xi'an And Electronic Technology Co Ltd filed Critical Xi'an And Electronic Technology Co Ltd
Priority to CN201910997067.XA priority Critical patent/CN110580845A/en
Publication of CN110580845A publication Critical patent/CN110580845A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/06Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
    • G09B23/18Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
    • G09B23/187Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for measuring instruments

Landscapes

  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Business, Economics & Management (AREA)
  • Mathematical Physics (AREA)
  • Algebra (AREA)
  • Computational Mathematics (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Pure & Applied Mathematics (AREA)
  • Instructional Devices (AREA)

Abstract

the invention relates to a virtual instrument embedded in a comprehensive teaching experiment platform. The device comprises a high-precision measurement function circuit, a high-speed measurement function circuit and a power supply circuit, wherein the high-precision measurement function circuit, the high-speed measurement function circuit and the power supply circuit are respectively connected with a comprehensive teaching experiment platform. On the basis of meeting the requirements of teaching experiments on functions and performance, the invention can obviously reduce the purchasing cost of schools, reduce the waste of space resources of experiment stations, realize the integration of instruments and teaching equipment and improve the teaching effect.

Description

一种嵌入于综合教学实验平台的虚拟仪器A Virtual Instrument Embedded in the Comprehensive Teaching Experiment Platform

技术领域technical field

本发明涉及教学领域,尤其是一种嵌入于综合教学实验平台的虚拟仪器。The invention relates to the teaching field, in particular to a virtual instrument embedded in a comprehensive teaching experiment platform.

背景技术Background technique

在高等教育过程中,特别是工科和理科的教学过程中,为了让学生能够更好地理解书本上的理论知识,一般会开设相应的实验课程。一种方式是,由老师通过教学设备进行相关知识的演示;另一种方式是,由学生直接操作教学设备、进行动手实验,通过动手实验的过程,进一步加深对理论知识的理解。In the process of higher education, especially in the teaching process of engineering and science, in order to enable students to better understand the theoretical knowledge in books, corresponding experimental courses are generally offered. One way is that the teacher demonstrates relevant knowledge through the teaching equipment; the other way is that the students directly operate the teaching equipment and conduct hands-on experiments, and through the process of hands-on experiments, they can further deepen their understanding of theoretical knowledge.

目前,市面的教学实验设备以各种专用小型实验箱或大型实验台为主,这些试验箱或试验台只专注于某个具体的实验电路原理,而实验过程中需要的激励信号或观察信号,往往需要再配套独立的台式仪器配合使用,这样会带来较多问题,总结如下:At present, the teaching experimental equipment on the market is mainly a variety of special small test boxes or large test benches. These test boxes or test benches only focus on a specific experimental circuit principle, and the excitation signals or observation signals required in the experimental process, It often needs to be used in conjunction with an independent desktop instrument, which will bring more problems. The summary is as follows:

1)学校每采购一套实验箱或试验台,就得配套采购相应的台式仪器,增加了一定的采购成本;1) Every time a school purchases a set of experimental boxes or test benches, it has to purchase corresponding desktop instruments, which increases the purchase cost to a certain extent;

2)传统台式仪器的体积重量普遍比较大,使得原本就比较紧张的实验工位面积无法缩小,浪费较多的空间资源;2) The volume and weight of traditional desktop instruments are generally relatively large, which makes it impossible to reduce the area of the experimental workstation, which is already relatively tight, and wastes more space resources;

3)传统台式仪器一般针对科研和生产设计,仪器的指标普遍比较好,而针对教学应用,传统台式仪器的指标往往过高,形成大马拉小车的局面,造成一定程度上的资源浪费;3) Traditional desktop instruments are generally designed for scientific research and production, and the indicators of the instruments are generally better, but for teaching applications, the indicators of traditional desktop instruments are often too high, forming a situation of big horses and small carts, resulting in a certain degree of waste of resources;

4)传统台式仪器和实验箱之间通讯不便,不利于在实验过程中提高两者的相关度,进而不利于改善实验体验,如实验电路与仪器之间的同步性、实验电路数据与仪器数据的相关性以及实验报告的撰写等。4) The communication between the traditional desktop instrument and the experimental box is inconvenient, which is not conducive to improving the correlation between the two during the experiment process, which is not conducive to improving the experimental experience, such as the synchronization between the experimental circuit and the instrument, the experimental circuit data and the instrument data The relevance and writing of experimental reports, etc.

虚拟仪器不同传统仪器,软件即仪器是其核心思想,虚拟仪器没有传统仪器的显示屏幕和操作面板,所有这些都通过虚拟软件面板实现。虚拟仪器相比传统仪器具有三大显著优势:一是由于去掉了显示屏、操作面板,仪器的体积、重量显著降低;二是由于将更多的功能交给上位机软件实现,可能充分发挥软件的能力,使得虚拟的实时和后期分析处理功能显著提高;三是设计和生产工艺简化,成本显著降低。随着仪器技术和信息技术的不断发展,虚拟仪器技术日趋成熟,已经在工业领域得到大规模应用,但目前仍未发现在教学实验上的应用。The virtual instrument is different from the traditional instrument. The software is the instrument is its core idea. The virtual instrument does not have the display screen and operation panel of the traditional instrument, and all these are realized through the virtual software panel. Compared with traditional instruments, virtual instruments have three significant advantages: first, because the display screen and operation panel are removed, the volume and weight of the instrument are significantly reduced; The ability of virtual real-time and post-analysis processing has been significantly improved; the third is the design and production process has been simplified, and the cost has been significantly reduced. With the continuous development of instrument technology and information technology, virtual instrument technology is becoming more and more mature, and has been widely used in the industrial field, but it has not yet been found in teaching experiments.

发明内容Contents of the invention

本发明为解决背景技术中存在的技术问题,而提供一种具有多种仪器功能的虚拟仪器,该虚拟仪器能够嵌入到小型化的综合教学实验平台主机中,与教学实验平台构成一个有机整体,为高等教育的理工科教学提供先进的教学设备。In order to solve the technical problems in the background technology, the present invention provides a virtual instrument with multiple instrument functions. The virtual instrument can be embedded in the host computer of the miniaturized comprehensive teaching experiment platform, and forms an organic whole with the teaching experiment platform. Provide advanced teaching equipment for science and engineering teaching in higher education.

本发明的技术解决方案是:本发明为一种嵌入于综合教学实验平台的虚拟仪器,其特殊之处在于:所述虚拟仪器包括高精度测量功能电路、高速测量功能电路和电源电路,高精度测量功能电路、高速测量功能电路、电源电路分别与综合教学实验平台连接。The technical solution of the present invention is: the present invention is a virtual instrument embedded in a comprehensive teaching experiment platform, and its special feature is that the virtual instrument includes a high-precision measurement function circuit, a high-speed measurement function circuit and a power supply circuit, and the high-precision The measurement function circuit, the high-speed measurement function circuit and the power supply circuit are respectively connected with the comprehensive teaching experiment platform.

优选的,高精度测量功能电路包括输入切换与保护电路,信号调理电路、高精度模数转换器和嵌入式处理器一,输入切换与保护电路接入信号调理电路,信号调理电路接入高精度模数转换器,高精度模数转换器接入嵌入式处理器一。Preferably, the high-precision measurement function circuit includes an input switching and protection circuit, a signal conditioning circuit, a high-precision analog-to-digital converter and an embedded processor 1, the input switching and protection circuit is connected to the signal conditioning circuit, and the signal conditioning circuit is connected to the high-precision Analog-to-digital converter, the high-precision analog-to-digital converter is connected to the embedded processor one.

优选的,高速测量功能电路包括嵌入式处理器二、双路14位高速模数转换器、双路14位高速数模转换器、可编程门阵列、方向控制电路和静态存储器,可编程门阵列分别与嵌入式处理器二、双路14位高速模数转换器、双路14位高速数模转换器、方向控制电路和静态存储器连接。Preferably, the high-speed measurement function circuit includes an embedded processor two, a dual-way 14-bit high-speed analog-to-digital converter, a dual-way 14-bit high-speed digital-to-analog converter, a programmable gate array, a direction control circuit and a static memory, and the programmable gate array It is respectively connected with the embedded processor 2, the dual-channel 14-bit high-speed analog-to-digital converter, the dual-channel 14-bit high-speed digital-to-analog converter, the direction control circuit and the static memory.

优选的,高速测量功能电路还包括输入保护电路,输入信号调理电源和输出信号调理电源,输入保护电路接入输入信号调理电源,输入信号调理电源接入双路14位高速模数转换器,双路14位高速数模转换器接入输出信号调理电源。Preferably, the high-speed measurement function circuit also includes an input protection circuit, an input signal conditioning power supply and an output signal conditioning power supply. The 14-bit high-speed digital-to-analog converter is connected to the output signal conditioning power supply.

优选的,电源电路包括嵌入式处理器三,数模转换器,降压转换器,DC/DC和输出监测与控制电路,嵌入式处理器三分别与数模转换器、DC/DC连接,与数模转换器、DC/DC分别通过降压转换器输出监测与控制电路连接。Preferably, the power supply circuit includes an embedded processor three, a digital-to-analog converter, a step-down converter, DC/DC and an output monitoring and control circuit, and the embedded processor three is respectively connected with the digital-to-analog converter and the DC/DC, and connected with the The digital-to-analog converter and the DC/DC are respectively connected to the monitoring and control circuit through the output monitoring of the step-down converter.

本发明通过对高等教育部分课程的研究分析,虚拟仪器部分应该具有万用表、示波器、信号源、频谱仪、逻辑分析仪、码型发生器、多功能数字IO、阻抗分析仪、程控电源等九种常用仪器功能,部分课程还会使用到矢量网络分析仪、高阻计等仪器,但是,考虑到不是大部分课程都用、而且实现成本偏高,因此,虚拟仪器的方案确定为常用的九种仪器功能。由于九种仪器功能中,部分仪器功能的硬件实现原理是相同的,差异主要在虚拟软面板的实现,最终确定使用三类功能电路实现九种仪器:高精度测量功能电路、高速测量功能电路以及电源电路。高精度测量功能电路实现万用表的硬件功能。高速测量功能电路实现模拟高速采集与输出以及数字量的高速采集与输出,用于实现示波器、信号源、频谱仪、逻辑分析仪、码型发生器、多功能数字IO和阻抗分析仪七种仪器的硬件功能。电源电路实现程控电源的硬件功能。本发明可以应用于中学和大学的电子、信息、机械、通信、仪器、电力等机电相关类课程的实验教学平台中。本发明具有以下优点:According to the research and analysis of some courses of higher education, the virtual instrument part should have nine types such as multimeter, oscilloscope, signal source, spectrum analyzer, logic analyzer, pattern generator, multifunctional digital IO, impedance analyzer, and program-controlled power supply. Commonly used instrument functions, some courses will also use vector network analyzers, high-resistance meters and other instruments, but considering that not most courses are used and the implementation cost is high, the virtual instrument scheme is determined to be the nine commonly used ones instrument function. Since the hardware implementation principles of some of the nine instrument functions are the same, and the difference is mainly in the realization of the virtual soft panel, it is finally determined to use three types of functional circuits to realize the nine instruments: high-precision measurement function circuit, high-speed measurement function circuit and power circuit. The high-precision measurement function circuit realizes the hardware function of the multimeter. The high-speed measurement function circuit realizes high-speed acquisition and output of analog and high-speed digital quantities, and is used to realize seven instruments of oscilloscope, signal source, spectrum analyzer, logic analyzer, code generator, multi-function digital IO and impedance analyzer hardware features. The power supply circuit realizes the hardware function of the program-controlled power supply. The invention can be applied to the experimental teaching platform of electromechanical related courses such as electronics, information, machinery, communication, instrument, electric power, etc. in middle schools and universities. The present invention has the following advantages:

1)三种虚拟仪器硬件电路,实现九种仪器功能,性能指标满足教学要求,具有很高的性价比,能够显著降低学校采购成本;1) Three kinds of virtual instrument hardware circuits realize nine kinds of instrument functions, the performance indicators meet the teaching requirements, have high cost performance, and can significantly reduce school procurement costs;

2)体积小、重量轻,便于潜入到教学设备内部,降低了对实验工位空间资源的需求;2) Small in size and light in weight, it is easy to sneak into the interior of the teaching equipment, reducing the demand for experimental station space resources;

3)与教学设备集成为一个整体,实现控制与数据的同步,显著改善教学效果。3) Integrate with teaching equipment as a whole, realize the synchronization of control and data, and significantly improve the teaching effect.

附图说明Description of drawings

图1为本发明应用的综合教学实验平台结构框图;Fig. 1 is the structural block diagram of the comprehensive teaching experiment platform that the present invention applies;

图2为本发明应用的综合教学实验平台结构布局图;Fig. 2 is the structural layout diagram of the comprehensive teaching experiment platform applied by the present invention;

图3是本发明的高精度测量功能电路原理框图;Fig. 3 is a functional block diagram of the high-precision measurement function circuit of the present invention;

图4是本发明的高速测量功能电路原理框图;Fig. 4 is the functional block diagram of the high-speed measurement function circuit of the present invention;

图5是本发明的电源电路原理框图。Fig. 5 is a functional block diagram of the power supply circuit of the present invention.

附图标记如下:The reference signs are as follows:

1、电源模块;2、多功能模块;3、虚拟仪器;4、主控模块;5、扩展接口;6、壳体;7、实验面包板;8、控制计算机;9、课程软件管理环境。1. Power module; 2. Multifunctional module; 3. Virtual instrument; 4. Main control module; 5. Expansion interface; 6. Shell; 7. Experimental breadboard; 8. Control computer; 9. Course software management environment.

具体实施方式Detailed ways

下面结合附图和具体实施方式对本发明进行详细说明。The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

参见图1、2,本发明虚拟仪器3应用的综合教学实验平台由电源模块1、多功能模块2、本发明虚拟仪器3、扩展接口5、主控模块4、壳体6和实验面包板7组成。主控模块4分别与电源模块1、多功能模块2、扩展接口5和本发明虚拟仪器3连接。电源模块1为多功能模块2和本发明虚拟仪器3的工作提供电源。多功能模块2主要与主机上扩展的实验电路配合,通过上位机软件、在主控模块4的控制下,实现实验的电路原理。本发明虚拟仪器3通过安装于上位机虚拟软面板、在主控模块4的控制下,为实验电路提供需要的各种源激励和信号测量。扩展接口5实现教学实验平台主机与实验电路之间的扩展连接。主控模块4接收上位机指令,实现对主机内部多功能电路和本发明虚拟仪器3的控制与数据交互。壳体6实现各模块的安装与防护。实验面包板7插拔在扩展接口5上,其中主控模块4主要实现USB数据交换功能,实现1路USB通讯与4路USB通讯之间的数据交换,基于常用的USB交换控制器进行实现,这里采用TUSB4041进行实现。多功能模块2采用32位单片机处理器STM32F446为核心,配套常规的模拟量采集电路、模拟量输出电路、数字量输入输出电路以及定时计数器电路进行整体功能实现。多功能模块通过USB接口与主控模块进行通讯,USB接口电路也是基于STM32F446的USB接口进行实现。Referring to Figures 1 and 2, the comprehensive teaching experiment platform for the application of the virtual instrument 3 of the present invention consists of a power supply module 1, a multi-function module 2, a virtual instrument 3 of the present invention, an expansion interface 5, a main control module 4, a housing 6 and an experimental breadboard 7 composition. The main control module 4 is respectively connected with the power supply module 1, the multi-function module 2, the expansion interface 5 and the virtual instrument 3 of the present invention. The power module 1 provides power for the work of the multi-function module 2 and the virtual instrument 3 of the present invention. The multifunctional module 2 mainly cooperates with the extended experimental circuit on the host computer, and realizes the circuit principle of the experiment through the host computer software and under the control of the main control module 4 . The virtual instrument 3 of the present invention is installed on the virtual soft panel of the upper computer and under the control of the main control module 4, it provides various source excitations and signal measurements required for the experimental circuit. The expansion interface 5 realizes the expansion connection between the host computer of the teaching experiment platform and the experimental circuit. The main control module 4 receives instructions from the upper computer, and realizes the control and data interaction of the multifunctional circuit inside the host computer and the virtual instrument 3 of the present invention. The housing 6 realizes the installation and protection of each module. The experimental breadboard 7 is plugged and unplugged on the expansion interface 5, wherein the main control module 4 mainly realizes the USB data exchange function, and realizes the data exchange between the 1-way USB communication and the 4-way USB communication, which is realized based on a commonly used USB exchange controller. Here adopt TUSB4041 to realize. The multi-function module 2 uses a 32-bit single-chip processor STM32F446 as the core, and is equipped with conventional analog acquisition circuits, analog output circuits, digital input and output circuits, and timer counter circuits for overall function realization. The multi-function module communicates with the main control module through the USB interface, and the USB interface circuit is also implemented based on the USB interface of STM32F446.

软件管理环境9加载在控制计算机8中,实验课程软件通过课程软件管理环境9调用本发明的主机硬件驱动,通过USB总线与主机中的主控模块4进行数据通讯,发送控制指令、读取采集的数据。控制计算机8采用普通的基于windows操作系统的商业计算机。主控模块4接收到控制计算机8的指令后,将其转换为内部局部总线数据,并实现与电源模块1、多功能模块2和本发明虚拟仪器3的通讯。各模块的功能在主控模块4的控制下,可以同时运行、互不影响,通过多条DMA通道实现与上位计算机之间的数据交互,模块的所有输入输出信号通过扩展接口5与实验面包板7进行交互。The software management environment 9 is loaded in the control computer 8, and the experimental course software calls the host hardware driver of the present invention through the course software management environment 9, and carries out data communication with the main control module 4 in the host computer through the USB bus, sends control instructions, reads and collects The data. Control computer 8 adopts common business computer based on windows operating system. After the main control module 4 receives the instruction of the control computer 8, it converts it into internal local bus data, and realizes the communication with the power supply module 1, the multi-function module 2 and the virtual instrument 3 of the present invention. Under the control of the main control module 4, the functions of each module can run at the same time without affecting each other. Data interaction with the upper computer is realized through multiple DMA channels. All input and output signals of the module are connected to the experimental breadboard through the expansion interface 5 7 to interact.

本发明虚拟仪器3包括高精度测量功能电路、高速测量功能电路、和电源电路,高精度测量功能电路、高速测量功能电路、电源电路分别与综合教学实验平台中的主控模块4连接。The virtual instrument 3 of the present invention includes a high-precision measurement function circuit, a high-speed measurement function circuit, and a power supply circuit, and the high-precision measurement function circuit, the high-speed measurement function circuit, and the power supply circuit are respectively connected to the main control module 4 in the comprehensive teaching experiment platform.

本发明虚拟仪器3具有万用表、双通道示波器、双通道信号源、单通道万用表、16通道逻辑分析仪、16通道码型发生器、16通道多功能数字IO、单通道阻抗分析仪以及双路程控电源等九种常用仪器功能,本发明虚拟仪器3的使用需要配合控制计算机8中安装的虚拟仪器软件一起使用,本发明虚拟仪器3的分析、显示、存储等功能均基于软件实现,为用户提供界面友好强大的虚拟面板。本发明虚拟仪器3的测试激励信号,一方面通过扩展接口5与实验面包板7交互,一方面直接引到壳体6面板上,方便用户直接使用。The virtual instrument 3 of the present invention has a multimeter, a dual-channel oscilloscope, a dual-channel signal source, a single-channel multimeter, a 16-channel logic analyzer, a 16-channel pattern generator, a 16-channel multifunctional digital IO, a single-channel impedance analyzer, and a dual-channel controller. Nine commonly used instrument functions such as power supply, the use of the virtual instrument 3 of the present invention needs to be used together with the virtual instrument software installed in the control computer 8, and the functions such as analysis, display, and storage of the virtual instrument 3 of the present invention are all based on software. User-friendly and powerful virtual panel. The test excitation signal of the virtual instrument 3 of the present invention interacts with the experimental breadboard 7 through the expansion interface 5 on the one hand, and directly leads to the panel of the housing 6 on the one hand, which is convenient for users to use directly.

参见图3,万用表功能能够实现直流电压、直流电流、交流电压、交流电流、电阻、导通、二极管等测试功能,万用表功能基于高精度测量功能电路实现,根据软件选择的测试功能,输入切换与保护电路首先实现测量通道的切换,同时为了防止过载信号对后端电路的损坏,这里还设计有过压和过流保护电路。信号切换至对应的信号调理电路输入端,信号调理电路对信号进行滤波、变换,将其变换至高精度模数转换器输入范围并由高精度模数转换器进行采集。高精度模数转换器采用24位高精度模数转换器,能够确保系统整体精度满足要求。高精度模数转换器采集输出经嵌入式处理器一处理后,通过局部总线与主控模块4之间进行指令与数据的交互。See Figure 3, the multimeter function can realize DC voltage, DC current, AC voltage, AC current, resistance, continuity, diode and other test functions. The multimeter function is realized based on the high-precision measurement function circuit. According to the test function selected by the software, input switching and The protection circuit first realizes the switching of the measurement channel. At the same time, in order to prevent the damage of the overload signal to the back-end circuit, an overvoltage and overcurrent protection circuit is also designed here. The signal is switched to the corresponding input terminal of the signal conditioning circuit, and the signal conditioning circuit filters and transforms the signal, transforms it to the input range of the high-precision analog-to-digital converter and collects it by the high-precision analog-to-digital converter. The high-precision analog-to-digital converter adopts a 24-bit high-precision analog-to-digital converter, which can ensure that the overall accuracy of the system meets the requirements. After the high-precision analog-to-digital converter collects and outputs are processed by the embedded processor, commands and data are exchanged between the local bus and the main control module 4 .

参见图4,其余虚拟仪器功能由高速测量功能电路实现,高速测量功能电路能够实现双通道示波器、双通道信号源、单通道万用表、16通道逻辑分析仪、16通道码型发生器、16通道多功能数字IO和单通道阻抗分析仪。示波器的核心是采用双路14位高速模数转换器,双路14位高速模数转换器由可编程门阵列FPGA进行同步采样控制,双路14位高速模数转换器输出的数据通过SPI总线进入FPGA的FIFO进行缓冲,然后传输至嵌入式处理二。信号源的核心是采用双路14位高速数模转换器,需要输出的数据由嵌入式处理二下发至板载内存中,FPGA控制双路14位高速数模转换器将内存中的数据按顺序转换成模拟信号,经过平滑滤波后输出,两路输出之间可由FPGA进行相位控制。阻抗分析仪基于双通道示波器和信号源配合实现,硬件上借用这两种仪器的电路,其余由软件算法实现。逻辑分析仪、码型发生器和多功能数字IO在硬件上均基于FPGA的IO口实现,三者的差别在于协议波形和信号方向不同,协议波形由软件生成并下载至静态存储器(SRAM),输入输出方向控制由电路的前端设计的方向控制电路实现。See Figure 4, the other virtual instrument functions are realized by the high-speed measurement function circuit, which can realize dual-channel oscilloscope, dual-channel signal source, single-channel multimeter, 16-channel logic analyzer, 16-channel pattern generator, 16-channel multi- Functional digital IO and single channel impedance analyzer. The core of the oscilloscope is to use dual 14-bit high-speed analog-to-digital converters. The dual-channel 14-bit high-speed analog-to-digital converters are controlled by the programmable gate array FPGA for synchronous sampling. The data output by the dual-channel 14-bit high-speed analog-to-digital converters passes through the SPI bus. Enter the FIFO of FPGA for buffering, and then transfer to embedded processing two. The core of the signal source is a dual-channel 14-bit high-speed digital-to-analog converter. The data to be output is sent to the onboard memory by the embedded processor. FPGA controls the dual-channel 14-bit high-speed digital-to-analog Sequentially converted into analog signals, output after smoothing and filtering, and the phase control between the two outputs can be performed by FPGA. The impedance analyzer is implemented based on the cooperation of a dual-channel oscilloscope and a signal source. The hardware uses the circuits of these two instruments, and the rest is implemented by software algorithms. The logic analyzer, pattern generator and multi-function digital IO are all implemented based on the IO port of the FPGA in hardware. The difference between the three is that the protocol waveform and signal direction are different. The protocol waveform is generated by software and downloaded to the static memory (SRAM). The input and output direction control is realized by the direction control circuit designed at the front end of the circuit.

参见图5,电源电路实现0-+15V、-15V-0V双路程控电源。双路程控电源作为虚拟仪器功能的一部分,采用宽输入电压的降压转换器(LDO)为核心实现,电路中的DC/DC为降压转换器提供输入电源,使用DA输出模拟信号控制降压转换器的输出电压,输出监测与控制电路能够监测输出电压与电流并反馈至控制端,嵌入式处理三接收局部总线过来的控制指令,实现输出电压、电流检测及反馈控制。Referring to Fig. 5, the power supply circuit realizes 0-+15V, -15V-0V dual program-controlled power supply. As a part of the virtual instrument function, the dual-program-controlled power supply is implemented with a wide input voltage step-down converter (LDO) as the core. The DC/DC in the circuit provides input power for the step-down converter, and uses DA to output analog signals to control the step-down The output voltage of the converter, the output monitoring and control circuit can monitor the output voltage and current and feed back to the control terminal, and the embedded processing three receives the control command from the local bus to realize the output voltage and current detection and feedback control.

本发明提供了多仪器功能的虚拟仪器,可以嵌入到综合教学实验平台中使用,在满足教学实验对功能、性能要求的基础上,能够显著降低学校的采购成本、减少实验工位的空间资源浪费,并实现仪器与教学设备的一体化、改善教学效果。The invention provides a virtual instrument with multi-instrument functions, which can be embedded into the comprehensive teaching experiment platform for use, and can significantly reduce the purchase cost of the school and reduce the waste of space resources of the experimental station on the basis of meeting the functional and performance requirements of the teaching experiment , and realize the integration of instruments and teaching equipment, and improve the teaching effect.

以上,仅为本发明公开的具体实施方式,但本发明公开的保护范围并不局限于此,本发明公开的保护范围应以权利要求的保护范围为准。The above are only specific implementations disclosed by the present invention, but the scope of protection disclosed by the present invention is not limited thereto, and the scope of protection disclosed by the present invention should be based on the scope of protection of the claims.

Claims (5)

1. The utility model provides a virtual instrument in comprehensive teaching experiment platform which characterized in that: the virtual instrument comprises a high-precision measurement function circuit, a high-speed measurement function circuit and a power supply circuit, wherein the high-precision measurement function circuit, the high-speed measurement function circuit and the power supply circuit are respectively connected with the comprehensive teaching experiment platform.
2. The virtual instrument embedded in the comprehensive teaching experiment platform according to claim 1, wherein: the high-precision measurement function circuit comprises an input switching and protecting circuit, a signal conditioning circuit, a high-precision analog-to-digital converter and a first embedded processor, wherein the input switching and protecting circuit is connected to the signal conditioning circuit, the signal conditioning circuit is connected to the high-precision analog-to-digital converter, and the high-precision analog-to-digital converter is connected to the first embedded processor.
3. The virtual instrument embedded in the comprehensive teaching experiment platform according to claim 2, wherein: the high-speed measurement function circuit comprises a second embedded processor, a two-way 14-bit high-speed analog-to-digital converter, a two-way 14-bit high-speed digital-to-analog converter, a programmable gate array, a direction control circuit and a static memory, wherein the programmable gate array is respectively connected with the second embedded processor, the two-way 14-bit high-speed analog-to-digital converter, the two-way 14-bit high-speed digital-to-analog converter, the direction control circuit and the static memory.
4. the virtual instrument embedded in the comprehensive teaching experiment platform according to claim 3, wherein: the high-speed measurement functional circuit further comprises an input protection circuit, an input signal conditioning power supply and an output signal conditioning power supply, wherein the input protection circuit is connected to the input signal conditioning power supply, the input signal conditioning power supply is connected to the 14-bit high-speed double-circuit analog-to-digital converter, and the 14-bit high-speed double-circuit digital-to-analog converter is connected to the output signal conditioning power supply.
5. The virtual instrument embedded in the comprehensive teaching experiment platform according to any one of claims 1 to 4, wherein: the power supply circuit comprises a third embedded processor, a DA (digital-to-analog) processor, a buck converter, a DC/DC (direct current/direct current) and an output monitoring and control circuit, wherein the third embedded processor is respectively connected with the DA and the DC/DC, and the third embedded processor is respectively connected with the DA and the DC/DC through the buck converter and the output monitoring and control circuit.
CN201910997067.XA 2019-10-21 2019-10-21 A Virtual Instrument Embedded in the Comprehensive Teaching Experiment Platform Pending CN110580845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910997067.XA CN110580845A (en) 2019-10-21 2019-10-21 A Virtual Instrument Embedded in the Comprehensive Teaching Experiment Platform

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910997067.XA CN110580845A (en) 2019-10-21 2019-10-21 A Virtual Instrument Embedded in the Comprehensive Teaching Experiment Platform

Publications (1)

Publication Number Publication Date
CN110580845A true CN110580845A (en) 2019-12-17

Family

ID=68815099

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910997067.XA Pending CN110580845A (en) 2019-10-21 2019-10-21 A Virtual Instrument Embedded in the Comprehensive Teaching Experiment Platform

Country Status (1)

Country Link
CN (1) CN110580845A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111025131A (en) * 2020-02-24 2020-04-17 浙江师范大学 Characteristic parameter measuring instrument for triode amplifying circuit
CN113804937A (en) * 2020-06-16 2021-12-17 普源精电科技股份有限公司 Multifunctional measuring equipment, resource allocation method, measuring method, device and medium

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5863229A (en) * 1981-10-13 1983-04-15 Nec Corp Testing device for analog-digital converter
CN2715114Y (en) * 2004-05-13 2005-08-03 戴戈 Multifunctional handheld intelligent virtual instrument
CN101051219A (en) * 2006-04-04 2007-10-10 李佳林 Full function data collecting system based on virtual technology
CN101668057A (en) * 2009-09-09 2010-03-10 深圳华为通信技术有限公司 Terminal and system with function of multimeter
US8417856B1 (en) * 2008-07-03 2013-04-09 Streamline Automation, Llc High speed sensor data transfer interface
KR101503880B1 (en) * 2014-05-15 2015-03-19 (주)청파이엠티 General measuring type Education platform
CN205375936U (en) * 2016-01-08 2016-07-06 武汉理工大学 Automatic change and relevant speciality comprehensive experiment teaching platform
CN106884809A (en) * 2017-03-20 2017-06-23 中国矿业大学 A kind of Coal Mine Ventilator real-time fault diagnosis and prior-warning device based on virtual instrument development platform
CN107449986A (en) * 2017-08-30 2017-12-08 中国地质大学(武汉) A kind of multifunctional virtual instrument and its data processing end
CN107633720A (en) * 2017-11-10 2018-01-26 北京时代行云科技有限公司 A kind of high in the clouds intelligent platform for electronic circuit experimental teaching
CN207181570U (en) * 2017-12-08 2018-04-03 吉林大学 A kind of electronic surveying integrated system
CN210925145U (en) * 2019-10-21 2020-07-03 西安与或电子科技有限公司 Virtual instrument embedded in comprehensive teaching experiment platform

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5863229A (en) * 1981-10-13 1983-04-15 Nec Corp Testing device for analog-digital converter
CN2715114Y (en) * 2004-05-13 2005-08-03 戴戈 Multifunctional handheld intelligent virtual instrument
CN101051219A (en) * 2006-04-04 2007-10-10 李佳林 Full function data collecting system based on virtual technology
US8417856B1 (en) * 2008-07-03 2013-04-09 Streamline Automation, Llc High speed sensor data transfer interface
CN101668057A (en) * 2009-09-09 2010-03-10 深圳华为通信技术有限公司 Terminal and system with function of multimeter
KR101503880B1 (en) * 2014-05-15 2015-03-19 (주)청파이엠티 General measuring type Education platform
CN205375936U (en) * 2016-01-08 2016-07-06 武汉理工大学 Automatic change and relevant speciality comprehensive experiment teaching platform
CN106884809A (en) * 2017-03-20 2017-06-23 中国矿业大学 A kind of Coal Mine Ventilator real-time fault diagnosis and prior-warning device based on virtual instrument development platform
CN107449986A (en) * 2017-08-30 2017-12-08 中国地质大学(武汉) A kind of multifunctional virtual instrument and its data processing end
CN107633720A (en) * 2017-11-10 2018-01-26 北京时代行云科技有限公司 A kind of high in the clouds intelligent platform for electronic circuit experimental teaching
CN207181570U (en) * 2017-12-08 2018-04-03 吉林大学 A kind of electronic surveying integrated system
CN210925145U (en) * 2019-10-21 2020-07-03 西安与或电子科技有限公司 Virtual instrument embedded in comprehensive teaching experiment platform

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
杨江平: "电子装备维修技术与应用", 31 March 2006, 国防工业出版社, pages: 231 - 232 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111025131A (en) * 2020-02-24 2020-04-17 浙江师范大学 Characteristic parameter measuring instrument for triode amplifying circuit
CN113804937A (en) * 2020-06-16 2021-12-17 普源精电科技股份有限公司 Multifunctional measuring equipment, resource allocation method, measuring method, device and medium

Similar Documents

Publication Publication Date Title
CN101403789B (en) High-voltage three-phase combined transformer verification standard device
CN106053981A (en) Electric energy quality acquisition terminal and related method
CN207198253U (en) A kind of servo rotary transformer analog device based on FPGA
CN110580845A (en) A Virtual Instrument Embedded in the Comprehensive Teaching Experiment Platform
CN203149382U (en) Virtual apparatus bus product calibration platform
CN103377580A (en) Comprehensive universal type modular single-chip microcomputer test bench
CN106249038A (en) A kind of General portable far-end high-power rudder electromechanics pressure, current measurement and calibrating installation
CN201689582U (en) Miniature electrical and electronic experimental table
CN210347827U (en) Integrated tester for automation equipment of transformer substation
CN105785197A (en) Distribution automation device integrated tester
CN210925145U (en) Virtual instrument embedded in comprehensive teaching experiment platform
CN110610639A (en) A Comprehensive Teaching Experiment Platform with Extensible Curriculum
CN204882753U (en) Automatic test equipment
CN103474966A (en) Capacitor harmonic resonance overvoltage detection method and protection device
CN210925146U (en) Course extensible comprehensive teaching experiment platform
Redfern et al. A personal computer based system for the laboratory evaluation of high performance power system protection relays
Yu et al. A PC oriented interactive and graphical simulation package for power system study
CN202221449U (en) Microcomputer relay protection tester
CN201311489Y (en) Standard detection device for high-voltage three-phase combined transformer
CN102707117A (en) Relay Protection Multifunction Tester
CN205720467U (en) A kind of distributing automation apparatus comprehensive tester
Zhu et al. Development and analysis of electronic and electrical experiment simulation technology
CN102279573A (en) Movable laboratory
CN201639489U (en) Frequency conversion power supply experiment platform and its monitoring system
CN201600440U (en) Comprehensive energy efficiency quality test device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination