The Application of TeeChart Control in UHV DC Converter Switch Test System Tiancheng Wang a, Jianfeng Zheng b, Hongyuan Wang c

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1 Advanced Materials Research Online: ISSN: , Vols , pp doi: / Trans Tech Publications, Switzerland The Application of TeeChart Control in UHV DC Converter Switch Test System Tiancheng Wang a, Jianfeng Zheng b, Hongyuan Wang c School of Information Science and Engineering, Changzhou University, Changzhou, Jiangsu, , China a wtc@cczu.edu.cn, b zjf@cczu.edu.cn, c hywang@cczu.edu.cn Keywords: TeeChart control; Waveform analysis; Multi-channel; Delphi Abstract. With the development of component technology, there are many powerful third party components. TeeChart control as one of them was widely used for waveform display and processing. Combining the software development of multi-channel waveform analysis, this paper introduces the characteristics and attributes method of TeeChart control. With using the control, it can realize graphical display of keeping historical data, contrast analyze of the multiple wave etc. And the waveform can be saved as picture or PDF format. Be given the correlation realization code in the Delphi 7.0 development environment. Introduction In UHV (ultra-high voltage) DC converter switch test system, it need display waveform of multiple voltage and current signals as well as analysis and process of these wave data. In programming, if you use your own design for the graphical user interface and write code of conventional methods to achieve time-consuming. Also the effect is not so good. Selecting an appropriate third-party component, this can significantly reduce the workload of programming and improve the work efficiency. Component technology is one of the pillars of the object-oriented programming technology. The third-party component is indispensable technical resources of all object-oriented programming platforms. TeeChart Pro component is unique in the family of a large number of third-party components. Excellent of its functionality is impressive. Combining with the software development of data analysis for the UHV dc switch test system, this paper introduces the TeeChart Pro in Delphi 7.0 development environment of applications. Profile of TeeChart control TeeChart Pro is the chart graphics components that developed by Steama Software company. TeeChart Pro VCL/CLX support Windows and Linux system platform as well we offer hundreds of 2D and 3D graphics style, more than 40 kinds of mathematical and statistical functions plus of unlimited shaft and various palettes components can be chosen and more than 20 kinds of tools for chart operation, which will get incisively and vividly in diagram production and operation function. It provide an efficient, intuitive and time-saving programming interface for programming and for end-user with follow one s inclinations play space. TeeChart Pro components as chart production field leader have the following features: (1) Chart. It is including TChart, TDBChart and TQRChart components and 22 components of TChart page. Total is 25. (2) Series. It is including standard, expansion, finance, statistics, three peacekeeping and six other types. Total is 49 types. That is covering twelve of standard, nine of expandable, eight of 3 d model, seven of statistics type, three of finance types and 10 of other type. (3) Function. It is including eleven of standard, 14 of standard function of finance and economics function and 12 of expansion of the statistics function. Total is 37. (4) ChartTools. It is including 14 of series operation class, 5 of coordinate transformation (Axes) operating and 8 of other tools. Total is 27. All rights reserved. No part of contents of this paper may be reproduced or transmitted in any form or by any means without the written permission of Trans Tech Publications, (ID: , Pennsylvania State University, University Park, USA-12/05/16,15:49:12)

Advanced Materials Research Vols. 503-504 1665 (5) Chart Export Format. It is including internal tee, PNG, GIF, BMP, WMF, EMF, JPEG, PCX, PDF, EPS, VML, SVG, GDI. Total is 13 formats.

2 Advanced Materials Research Vols (5) Chart Export Format. It is including internal tee, PNG, GIF, BMP, WMF, EMF, JPEG, PCX, PDF, EPS, VML, SVG, GDI. Total is 13 formats. (6) Data Export Format. It is including internal tee (binary or text), text (CSV), XML, Excel, HTML. Total is 5 kinds. (7) Other. It is including spin, amplification, rolling, printing, coloration and other auxiliary functions. Realization of Multi-channel waveform analysis software It has accurate and intuitive features to display data waveform and data analysis, which can guide engineering technical personnel to do qualitative and quantitative analysis. It is significant in the industrial control field. Waveform analysis software will read original data from EXCEL file to do pretreatment. Then these treated data will be sent to TeeChart component and display multi-channel waveform by TeeChart. The entire process flow is shown in Fig. 1: Read original data from EXCEL file Data pretreatment Custom axes Export& Print TeeChart component Scale setting Zoom Display multi-channel waveform Fig.1 Process flow of waveform analysis software TeeChart component is the core of the whole waveform analysis software. Most of the software function can be completed by TeeChart component. Developers only need to set up and a little program to the preparation of complex waveforms can be generated, which greatly reducing software development cycle and improve the reliability of the system compared with conventional methods. In software, waveforms can be guided into a picture format, also can print the waveform and to do stepless zoom of the waveform, you can also set up more than one scale to complete waveform measurement. Running interface of analysis software shown in Fig. 2. Fig.2 Running interface of analysis software Figure 2, article tools can realize the above all of the functions. The right of the waveform selection can select an arbitrary waveform with comparative analysis. The below form can be shown maximum value of different waveform. If the Y-axis direction of the scale, you can also display the value of the position of the different waveform scale. Scale location of the X-axis values are displayed in a rectangular box of axis.

1666 Frontiers of Manufacturing Science and Measuring Technology II Custom axis Drag TeeChart control drag icon to window, double click to open TeeChart control attributes Settings window.

3 1666 Frontiers of Manufacturing Science and Measuring Technology II Custom axis Drag TeeChart control drag icon to window, double click to open TeeChart control attributes Settings window. In the tree menu of chart of the left of window, select the nodes of the Chart under Axis child nodes. The right of window will show all current axis. There have two buttons + and - under these axis. Via the two buttons, you can add and delete custom axis manually. It is shown in Fig. 3. Fig. 3 Attributes Setting Window When finished adding custom axes, Axis node under the left side of the window there will be newly added axis, select the axis, the right of the window can be setting the position of this axis, value of maximum and minimum, grid, title and the initial value of the various properties. Also you can set these attributes through the code to dynamically in the program based on actual needs. Dynamically set custom some of the attributes of axes of the sample code is as followed: Chart1. CustomAxes [0]. SetMinMax (Custom0_Min, Custom0_Max); / / set axis values Chart1. CustomAxes [0]. StartPosition: = Custom0_Start; / / set the starting position of the axis Chart1. CustomAxes [0]. EndPosition: = Custom0_End; / / set the end position of the axis Realization of waveform sequence and scale Open TeeChart control Settings window, choose Series node, in the right of the window can add or remove waveform sequence. According to the requirements of the system, we have added six waveform sequences. Adding sequence is completed, each of one sequence can be set the initial parameters. Sequence attribute and axis setting mode is similar, after selected each sequence on in the window on the right will appear related properties, these properties can be set directly in the window Settings, also can be modified dynamically in program through the code. Note that, because we should be in a coordinate system show multiple separate waveform, thus to each sequence be set up different axis. After the waveform sequence settings finished, you can write the shown data in system. In the program, firstly read input data from the EXCEL file, and then read needed parameter of data processing from a configuration file for pretreatment. Lastly these data will be displayed in sequence that transferred in sequence by cycle way. The relative part of code is as follows: Read its configuration file code: IniFile1:= TIniFile.create(ExtractFilePath(ParamStr(0)) + 'Setting.ini'); IO_K := IniFile1.ReadFloat('Default', 'IO_K', ); Waveform sequence shows part of the code: for i := 4 to F1Book61_tmp.MaxRow do begin ftmp := StrToFloatDef(TextRC[i,2], ); if ftmp > then Series1.AddXY(NumberRC[i,1], (IO_K* ftmp +IO_B)); end;

4 Advanced Materials Research Vols In order to analysis the different parts of the waveform, adding the scale of the X axis needed. First of all in TeeChart Settings window defined the scale as well as shows the scale location of the rectangular box, and then writing code in program to realize the dynamic of the scale and concealed shows. Note that, because the scale need run through all of the waveform sequence, so the scale is using Color Line type rod, not Cursor type. Relative part code of these programs is as follows: ChartTool8.Active := not ChartTool8.Active; ChartTool8.Value := Chart1.BottomAxis.Minimum + (Chart1.BottomAxis.Maximum Chart1.BottomAxis.Minimum) * 0.5; if (ChartTool8.Active) and (ChartTool9.Active) then str1:=format('x1=%.2f'#$d#$a'x2=%.2f'#$d#$a' X=%.2f', [ChartTool8.Value,ChartTool9.Value,(ChartTool9.Value - ChartTool8.Value)]) ; else if (ChartTool8.Active) then str1:= Format ('X1=%.2f', [ChartTool8.Value]) else if (ChartTool9.Active) then str1:= Format ('X2=%.2f', [ChartTool9.Value]) else str1:= ''; ChartTool1.Active:= ChartTool8.Active or ChartTool9.Active; ChartTool1.Text:= str1; Export and print waveform In the application, it need save the waveform as picture format. This need add this function in the waveform analysis software. TeeChart Pro component has this function, just need invoke the related events can be achieved. The program code of waveform will be converted to image format for saving is as followed: with mybmp do begin Width := Chart1.Width; Height:= Chart1.Height; Chart1.BufferedDisplay:=False; Chart1.Draw(Canvas,Rect(0,0,Chart1.Width,Chart1.Height)); sfilename := ChangeFileExt(SaveDialog.FileName, '.bmp); SaveToFile(sFileName);//Save path end; To realize the printing function of the waveform, firstly be drag TChart Previewer control to window, and then click chosen this control, in the Object inspector properties window it should associate this control and corresponding TChart control instance. Call relative events in the program then waveform print window pop-up. In this window, it can realize waveform print preview and print. Conclusion Combined with UHV DC converter switching waveform analysis of test system software development, this paper introduces the TeeChart application in Delphi7.0 development environment. Developers use TeeChart Pro component to realize different types of components chart drawing. It has some following characteristics of development code simple, shot cycle, high efficiency and reliability and getting satisfied results. References [1] J.H.Qu, TeeChart Application- Chart tools, Beijing, 2007 [2] S.B.Cai, J.F.Li, X.D.Mei, Application for TeeChart to complete the data analysis, Industrial control computer, 2006(09)

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