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Research on Electronic Measurement Station Software Integration Techniques Base on Virtual Instrument Architecture

Author: XiaoHao
Tutor: LiJinTao；OuYangJianQuan
School: Xiangtan University
Course: Applied Computer Technology
Keywords: Virtual instrument Software Integration Command interface Data interface Driver interface layer
CLC: TP311.52
Type: Master's thesis
Year: 2008
Downloads: 98
Quote: 0
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Abstract

Virtual instrument test technology development technology is an epoch-making product, it has played a great role in promoting the development and application of electronic measurement technology. Virtual instrument software is the new concept of the instrument, the virtual instrument system, the software is the core of the entire test system, it will be the core of the software system platform with specific functional modules of phase separation between the agreed software interface interrelated, the function of the instrument can be user defined and design, and then change, enhanced functionality and scale to meet the special requirements of the instrumentation system. Development of virtual instrument technology makes building a multi-module integration testing equipment possible, and the complexity of the object to be measured and the measured target study with multi-parameter test the multifunctional integration testing equipment become necessary. To this end, the article focuses on multi-module integration technology of virtual instrument software research mainly involving multi-module Virtual Instrument Software Architecture, drive technology, synchronization and linkage technology and multi-module interface technology. Based on the analysis of existing methods to obtain the following key findings: 1, the virtual instrument software integrated multifunction modules collaborative way from single-function modules to be extended. The proposed multi-module integrated multiple measurement functions module work together top-level framework, the relationship between the top-level architecture and modules simplify the management interface calls. Integration framework based on the top-level interface, the two-level interface isolation module can easily increase or decrease, or module upgrading to meet the openness, scalability requirements. Configuration management software interface based on XML document technology to achieve the dynamic configuration of the interface. Can automate the deployment and display of the of different resolutions interface program, flexible multi-module and single-module function interface conversion. 2, based on the instruction queue the the instruction interface between the the upper software and driver. Equipment operation between the the upper functional software driver instruction buffer instruction queue, the instruction parser parse instruction queue instructions and by the instruction scheduler scheduling. Command interface simplifies the upper functional software driver interface, isolated from the upper and lower software driver, multifunction modules work together mutually exclusive and competitive equipment resources into orderly access, while increasing the instrument module can be alternative. 3, based on the data queue data interface between the driver layer and the upper layer module software layer. A measurement after the work is completed, the data interface from the device to read the measurement data of all the functional modules stored in the data queue, the data distribution device to remove data from the data queue data separator in accordance with the instrument modules, and then the data distribution, to complete a measurement process . Use the data queue sampling data cache, the separation and distribution, based instrument functions to achieve the synchronization between the software modules in multi-module collaboration. 4, based on the instruction interface and data interface for the proposed driver abstraction layer - drive interface layer. The drive interface layer abstraction and encapsulation of each instrument module driver command interface for device operation mechanism between the upper layer software modules and drivers, data interface for data notification mechanism between the upper software modules and drivers. Drive interface layer between the upper software module driver working mechanism for queuing notification mechanism improved by the query wait mechanism. The experiments show that the notification mechanism to solve the problem of competition in the bus and equipment resources, and improve the efficiency of the drive.

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