CN102967840A - Digital multimeter automatic verification system based on virtual instrument technology and control method - Google Patents
Digital multimeter automatic verification system based on virtual instrument technology and control method Download PDFInfo
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Abstract
本发明型涉及一种数字多用表检定系统及虚拟仪器技术，属于自动化领域，尤其涉及基于虚拟仪器技术数字多用表自动检定系统及控制方法。本发明整个系统以通讯模块为通讯基础，上位机通过RS-232或IEEE488接口通讯接口与物理设备相连接；采用虚拟数表VDM识别指令，利用数据处理模块来处理转换数据。使测控领域中计算机技术得到充分运用，以上位机软件为控制核心，通过A/D转换并以通讯接口的方式对标准设备和被检设备进行数据采样，对标准设备和被检设备进行多次循环误差计算，通讯接口采用RS232和IEEE488两种接口相互转换，将检定数据采集到计算机中，利用软件程序进行误差计算，最终将检定记录保存在动态数据库中。可提高检表速度和效率，节约数字仪表的检测成本。
The invention relates to a digital multimeter verification system and virtual instrument technology, belonging to the field of automation, in particular to an automatic verification system and a control method for a digital multimeter based on virtual instrument technology. The whole system of the present invention is based on the communication module, and the upper computer is connected with the physical equipment through the RS-232 or IEEE488 interface communication interface; the virtual data table VDM is used to identify instructions, and the data processing module is used to process and convert data. Make full use of computer technology in the field of measurement and control. The upper computer software is the control core, and the standard equipment and the tested equipment are sampled through the A/D conversion and the communication interface. Cyclic error calculation, the communication interface adopts two interfaces of RS232 and IEEE488 to convert each other, the verification data is collected into the computer, the error calculation is performed by software program, and the verification record is finally saved in the dynamic database. The meter inspection speed and efficiency can be improved, and the inspection cost of digital meters can be saved.
Description
Technical field
The present invention relates to a kind of digital multimeter verification system and virtual instrument technique, belong to automatic field, relate in particular to a kind ofly based on virtual instrument technique digital multimeter automatic verification system and control method, is that a kind of virtual instrument is to the control technology of digital instrument.
Background technology
At present, the detection technique of China's digital instrument adopts semi-automatic always, and this detection technique exists inefficiency, the weak point of poor accuracy.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, provide based on virtual instrument technique digital multimeter automatic verification system in order to improve inspection indicated airspeed degree and efficient, and provide a kind of based on virtual instrument technique digital multimeter automatic verification system and control method.Purpose be for solve when calibrating more because of project, range is complicated, the data precision requirement high, the valid data position is longer, workload is very large when artificial calibrating, the problem that efficient is not high.
The technical solution adopted for the present invention to solve the technical problems is:
Based on virtual instrument technique digital multimeter automatic verification system: whole system is the basis take communication module as communication, and host computer is connected with physical equipment by RS-232 or IEEE488 interface communication interface; Adopt virtual several Table V DM recognition instruction, utilize data processing module to process translation data.
Control method based on virtual instrument technique digital multimeter automatic verification system: comprise host computer digital multimeter automatic verification system software, virtual several Table V DM, data processing module, communication interface module, physical equipment and control accordingly change-over circuit; Send steering order by host computer, the control physical equipment is simulated output, and the command analysis device among virtual several Table V DM automatically identification is given data processing module again and carried out the data processing from the digital signal of control change-over circuit; Data processing module arranges automatic detection scheme, and physical equipment is detected automatically.
Be configuration file to described communication interface module.
It is as follows that the control of described virtual several Table V DM sends commands steps:
A. described virtual several Table V DM comprise 3 virtual machines: standard source, standard scale, tested table;
B. user software interface setting calibrating point is examined table schema; Translate into the calibrating procedure code by host computer;
C. after virtual several Table V DM state control section receives the order that host computer provides, from communication protocol, find corresponding tested device command;
D. for iterated command, invalid command etc. will not be resolved; And effective order passed to the command analysis device; Wherein can not find device command in communication protocol, to be defaulted as current state will not resolve;
E. after the command analysis device resolve command, 16 system numbers are passed to corresponding virtual machine, the state of 3 virtual machines of control; Comprising the best range in table source choose, source output control etc.;
F.3 virtual machine sends a command to physical equipment by communication module, automatically regulates the state of respectively showing the source and source output etc.
The control image data step of described virtual several Table V DM is as follows:
A. select arbitrarily virtual machine image data by virtual several Table V DM status control module;
B. corresponding virtual machine is by communication interface module image data from physical equipment;
C. virtual machine is sent to the command analysis device with the data that receive;
D. the state control section of virtual several Table V DM finds corresponding tested device command from communication protocol, and the command analysis device is resolved valid data, and exports to host computer;
E. host computer is by software derived data form.
Described epigynous computer section comprises: for calibrating project management and data management and the derivation part of distinct device.
Described data processing module comprises that the processing of calibrating data, report on credentials management, verification process are controlled, the contents such as project management are resolved and examined and determine to the calibrating standard.
The present invention has following characteristics:
1, for the calibrating project management of distinct device and data management and derive part.
2, master system provides multiple interfaces, in order to realize data interaction with other system.
3, interconnected by ODBC and other management system based on the C/S framework.
4, by HTTP/Web Service and other management system based on the B/S framework.
Advantage of the present invention and effect are:
The present invention proposes on the virtual instrument technique basis in NI company in order to break through original instrument Control ﹠ data acquisition category, has proposed communication interface module and has partly replaced hardware in the mode of file configuration.Make in the measurement and control area, computer technology has obtained using more fully, detection system is take upper computer software as control core, by the A/D conversion and in the mode of communication interface standard device and tested equipment are carried out data sampling, standard device and tested equipment are carried out repeatedly cyclic error calculating, communication interface adopts RS232 and two kinds of interfaces of IEEE488 mutually to change, to examine and determine data acquisition in computing machine, utilize software program to carry out error and calculate, the calibrating record is kept in the dynamic data base the most at last.Bring the innovation of technical device, improved speed and the efficient of inspection table, the testing cost of having saved digital instrument.
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is system architecture synoptic diagram of the present invention;
Fig. 2 is system architecture process flow diagram of the present invention.
Among the figure: virtual several Table V DM 1, data processing module 2, communication interface module 3, physical equipment 4, host computer 5.
Embodiment
The present invention is a kind of based on virtual instrument technique digital multimeter automatic verification system, and whole system is the basis take communication module (3) as communication, and host computer 5 is connected with physical equipment 4 by RS-232 or IEEE488 interface communication interface.Adopt virtual several Table V DM 1 recognition instruction, utilize data processing module 2 to process translation data.
As depicted in figs. 1 and 2, whole system of the present invention is carried out the communication network link by communication interface module 3, virtual several Table V DM 1, data processing module 2, physical equipment 4 have RS-232 or IEEE488 interface separately, can select dual mode to carry out network communication.In the operational process, send steering order by host computer 5, the 4 simulation outputs of control physical equipment, command analysis device among virtual several Table V DM 1 is identified the digital signal from the control change-over circuit automatically, give again data processing module 2 and carry out the data processing, automatic detection scheme is set, physical equipment 4 is detected automatically.
The control method that the present invention is based on virtual instrument technique digital multimeter automatic verification system comprises host computer 5 digital multimeter automatic verification system softwares, virtual several Table V DM 1, data processing module 2, communication interface module 3, physical equipment 4 and controls accordingly change-over circuit.Send steering order by host computer 5, control physical equipment 4 is simulated output, and the command analysis device among virtual several Table V DM 1 automatically identification is given data processing module 2 again and carried out the data processing from the digital signal of control change-over circuit; Data processing module 2 arranges automatic detection scheme, and physical equipment 4 is detected automatically.The present invention is with virtual instrument VDM control core, mainly is comprised of command analysis device, status control module, standard scale virtual machine, tested table virtual machine, standard source virtual machine etc.Host computer 5 mainly partly is comprised of man-machine dialog interface, data management, project management etc.Communication interface module mainly is comprised of communication protocol resolver and communication interface etc.Object equipment mainly is by standard source, output source, standard scale, the compositions such as RS-232 or IEEE488 interface.
So-called host computer 5 refers to that the people can directly send the computing machine of controlling order, shows in real time on the screen that various collection signals change and result of calculation, also can store historical data.Comprise calibrating project management and data management and derivation part for distinct device.
Virtual instrument VDM refers to control virtual machine state and physical equipment state and automatic data collection.Virtual instrument generally adopts the communication interface hardware module: that adopts in the present invention is the mode of file configuration.Set unified communication interface by virtual several Table V DM.
Described data processing module 2 comprises that the processing of calibrating data, report on credentials management, verification process are controlled, the contents such as project management are resolved and examined and determine to the calibrating standard.
Described communication interface module 3, communication interface module 3 refers at the communication interface setting section.Compare the America NI virtual instrument technique, this system is different on communication module: namely the communication interface module in this system is the communication hardware module that configuration file has replaced NI.
Control described in the present invention sends commands steps and comprises:
A. described virtual several Table V DM 1 comprise 3 virtual machines: standard source, standard scale, tested table.
B. user software interface setting calibrating point is examined table schema.Translate into the calibrating procedure code by host computer 5.
C. after virtual several Table V DM 1 state control section receives the order that host computer 5 provides, from communication protocol, find corresponding tested device command.
D. for iterated command, invalid command etc. will not be resolved.And effective order passed to the command analysis device.Wherein can not find device command in communication protocol, to be defaulted as current state will not resolve.
E. after the command analysis device resolve command, 16 system numbers are passed to corresponding virtual machine, the state of 3 virtual machines of control.Comprising the best range in table source choose, source output control etc.
F.3 virtual machine sends a command to physical equipment 4 by communication module, automatically regulates the state of respectively showing the source and source output etc.
The image data of control described in the present invention step comprises:
A. select arbitrarily virtual machine image data by virtual several Table V DM 1 status control module.
B. corresponding virtual machine is by communication interface module 3 image data from physical equipment 4.
C. virtual machine is sent to the command analysis device with the data that receive.
D. the state control section of virtual several Table V DM 1 finds corresponding tested device command from communication protocol, and the command analysis device is resolved valid data, and exports to host computer 5.
E. host computer 5 is by software derived data form.
During the mode of connection of the present invention arranges, " it is Unidirectional direct-current that the mode of connection is set " is if not this device command in the tested table, virtual machine does not need to resolve 16 carry system codes this moment, only needs the current standard scale of change, standard source, tested table three virtual machine state to get final product.Do not send order to physical equipment.
It is Y connection that client of the present invention sets the mode of connection, translating into corresponding calibrating procedure code by virtual several Table V DM is JXFS=A4, this moment fetch equipment order PARW=A|YVsw=Y, select corresponding virtual machine, resolve 16 carry system codes [02 00 00 01 00 00 17 50 41 52 57 3D, 41 7C, 59 56 73 77 3D, 59 05 D4 03 03 03 03], send to physical equipment by the communication interface module parsing, regulate the physics equipment state.
When double transmission switched to 100V with the DC voltage range, virtual several Table V DM only carried out for the first time order, and given up the second time, do not carry out command analysis.
Automatic time delay 2s, calibrating procedure code wait (2000), this moment, virtual machine waited for that 2s continues to resolve.Do not send any order to slave computer.
The regulation output setting is only for standard source, (table source one) these two virtual machines of tested table.
Illustrate: for certain tested equipment, the client arranges mode of connection Y connection, standard source DC voltage range 100V, output voltage 10V.
Claims (7)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104111436A (en) * | 2014-08-05 | 2014-10-22 | 上海市计量测试技术研究院 | Automatic detection system and method for digital multimeter |
| CN106546936A (en) * | 2016-11-04 | 2017-03-29 | 中国电力科学研究院 | A kind of energy efficiency monitoring equipment detection virtual detecting system and detection method |
| CN108520747A (en) * | 2018-03-29 | 2018-09-11 | 浙江吉利汽车研究院有限公司 | A vehicle control device with voice recognition function |
| CN110780253A (en) * | 2019-12-10 | 2020-02-11 | 广东电网有限责任公司 | Intelligent verification system and method for multi-epitope digital instrument |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104111436A (en) * | 2014-08-05 | 2014-10-22 | 上海市计量测试技术研究院 | Automatic detection system and method for digital multimeter |
| CN106546936A (en) * | 2016-11-04 | 2017-03-29 | 中国电力科学研究院 | A kind of energy efficiency monitoring equipment detection virtual detecting system and detection method |
| CN108520747A (en) * | 2018-03-29 | 2018-09-11 | 浙江吉利汽车研究院有限公司 | A vehicle control device with voice recognition function |
| CN110780253A (en) * | 2019-12-10 | 2020-02-11 | 广东电网有限责任公司 | Intelligent verification system and method for multi-epitope digital instrument |
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