CN102944786B - Method for measuring volt-ampere characteristic of electric material - Google Patents
Method for measuring volt-ampere characteristic of electric material Download PDFInfo
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- CN102944786B CN102944786B CN201210449107.5A CN201210449107A CN102944786B CN 102944786 B CN102944786 B CN 102944786B CN 201210449107 A CN201210449107 A CN 201210449107A CN 102944786 B CN102944786 B CN 102944786B
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Abstract
The invention belongs to the technical field of measurement on a volt-ampere characteristic of an electric material and relates to a method for measuring the volt-ampere characteristic of the electric material. The method comprises the following steps of: firstly, inputting a voltage range and an interval of the electric material to be measured, which need to be measured, then carrying out automation control according to input information, inputting the proper interval and making a volt-ampere characteristic curve of the electric material; after measuring a current passing through the material by a pA meter, outputting and transmitting the current to a measurement equipment system, enabling the number grade of the current measured by the pA meter to reach pA and measuring the volt-ampere characteristic of the high-resistance electric material; and carrying out voltage input and judgment, i.e. inputting a voltage in the given voltage range by the measurement equipment system, applying the voltage to the electric material, gradually increasing the voltage, judging whether the voltage is in the range or not by the measurement equipment system, continuously carrying out measurement if the voltage is in the range and stopping the measurement if the volage goes beyond the range. The method has a reliable principle, is accurate to measure, is visual for carrying out data analysis, is simple to operate, is time-saving, is visual in result display, is low in cost and is suitable to measure the volt-ampere characteristics of various electric materials.
Description
Technical field:
The invention belongs to volt-ampere characteristic of electric material field of measuring technique, relate to a kind of method utilizing constant pressure source, Pi Anbiao, computing machine and LabVIEW software measurement volt-ampere characteristic of electric material, the method can indicate the curve of volt-ampere characteristic change and automatically preserve measurement data, and demonstrate the X-Y scheme of voltage-electric current, especially can the volt-ampere characteristic change of measuring resistance material or triode material, belong to a kind of volt-ampere characteristic of electric material measuring technique scheme based on LabVIEW.
Background technology:
Along with developing rapidly and widespread use of material science, new material constantly occurs, its relevant applied research has also attracted the interest of numerous researcher.Its volt-ampere characteristic change mostly will be known when a kind of performance test of new material and use.The volt-ampere characteristic (as triode) of some special materials can change along with the change of voltage, and when material application is under the environment that voltage constantly changes, the voltammetric characteristic measuring of material is just particularly important.Guarantee that the instrument under these environment can precise and safety use, usually need to know the variation tendency of some of them material volt-ampere characteristic and the roughly variation range of material volt-ampere characteristic, product is made to improve performance to carry out calibration to instrument, so the volt-ampere characteristic variation tendency measuring material just seems particularly important.Traditional voltammetric characteristic measuring device once can only survey one group of voltage, current value, need to material magnitude of voltage, then after reometer stable reading, while write down magnitude of voltage whilst reading current value, not only require great effort but also time-consuming, also not too accurate and data can not be preserved automatically, and also to carry out data processing after measurement terminates and resistance value is scaled resistivity, and more existing more advanced surveying instruments, as although PPMS can measure automatically, and its error is very little, but the investment of these equipment and instruments is larger, general unit and scientific research institution are difficult to bear economically, not easily popularity uses, and use operation steps complicated, so sum up to get up, it is complicated that existing voltammetric characteristic measuring technical scheme ubiquity device therefor, and measuring process is loaded down with trivial details, measures input cost high, the outstanding shortcomings such as measurement result and data accuracy difference.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art existence, seek design a kind of based on LabVIEW language, utilize constant pressure source, Pi Anbiao, GPIB line, RS232 line and detected materials, build a set of simple to operate, can the measuring method of volt-ampere characteristic of Measurement accuracy electricity material, for directly measuring the concrete constant voltage residing for electricity material and the volt-ampere characteristic under this constant voltage condition, and measurement result is stored in specified file, demonstrate voltage and current X-Y scheme in time on the display device, make data variation trend more directly perceived; Utilizing mensuration electricity material being made triode, voltage electricity material applying constant voltage and changes at equal intervals, obtaining the volt-ampere characteristic of material under this constant voltage according to gathering present current value when being interposed between change voltage between set transformation.
To achieve these goals, the main body step of the inventive method be included in select carry out inputting voltage range and interval, curent change and output, the voltage input of measuring needed for detected materials based on disposable in the measuring equipment system of LabVIEW and judge and electric current and voltage data storing; First input voltage range and the interval of the required measurement of electricity material to be measured, then carry out Automated condtrol according to the information of input, input suitable interval, make the volt-ampere characteristic of electricity material; Curent change and output are the change voltage owing to being applied on electricity material, constantly will be changed along with voltage by the electric current of electricity material, Pi Anbiao is utilized to measure electric current by material, recycling GPIB line exports and passes to measuring equipment system, Pi Anbiao measures the quantity rank of electric current to reach pA, measures the volt-ampere characteristic of high value electricity material; Voltage input and judgement, measuring equipment system is to given voltage range, input voltage, by this constant pressure source of RS232 line traffic control IDEC two passage output voltages, and voltage is added on electricity material, increase voltage gradually, measuring equipment system judges whether in scope, then continue to measure in scope, exceed, stop measuring; The storage of voltage and current data utilizes measuring equipment system automatically process the information measured and data and store; Its concrete measuring process is:
(1), on electricity material sample to be measured, node weld is selected to go out three terminals, electricity material sample to be measured is placed in a stable environment, according to electrical principles figure, electricity material sample to be measured three terminals are connected on two passages of constant pressure source respectively, then Pi Anbiao is connect in the line;
(2) on the measurement interface of measuring equipment system, input the title of electricity material sample to be measured, be added in constant voltage scope on electricity material sample to be measured and change interval, (interval is relative large to change voltage range and interval (size at interval determines the data-intensive degree of volt-ampere characteristic measured) and time interval of gathering current wait, voltage source output voltage is more stable, the electric current gathered is accurate), click keys starts the store path (being defaulted as desktop) starting the rear robot calculator according to a measuring equipment system prompting input measurement data;
(3), the currency initial value of voltage range (be for the first time change) of change voltage passes to this constant pressure source of IDEC by RS232 line by measuring equipment system, controls a passage and exports a burning voltage and be added on electricity material sample to be measured;
(4), after the time interval of input, Pi Anbiao samples to the electric current by electricity material sample to be measured, and passes to the robot calculator of measuring equipment system through GPIB bundle of lines current value;
(5), measuring equipment system compares the voltage change range of change voltage current value and input, if changing in voltage range, then change after magnitude of voltage increases transformation interval and perform (3) step; If exceed transformation scope, then perform the step of (6);
(6), measuring equipment system compares the constant voltage scope of constant voltage currency and input, if within the scope of constant voltage, then constant voltage values increases constant voltage interval, and transformation scope initial value is assigned to change voltage, then performs the step of (3); If exceed constant voltage scope, then terminate to run;
(7), the current value under the change voltage of collection and current voltage is formed in the file that step that one-dimension array is stored into (2) specifies, then line feed records once tested data immediately below this, finally form the array of capable 2 row of n, wherein n is pendulous frequency;
(8), repeat (3), (4), (5), (6) and (7) step until measure working procedure stopping, completing and measure and export.
The measuring equipment system that the present invention realizes voltammetric characteristic measuring comprises constant pressure source, Pi Anbiao, data acquisition board, GPIB line, RS232 line and robot calculator, is communicated with forms volt-ampere characteristic of electric material measuring equipment system according to telecommunications breath measuring principle; The value output voltage that constant pressure source is specified according to measuring equipment system, voltage range is 0-30V, input channel is three, be added in three ends of electricity material sample to be measured respectively, a passage is used to provide constant voltage, under its constant voltage, the voltage using another passage to provide to gradually change measures the electric current by electricity material to be measured; The program using LabVIEW to write, is added in the magnitude of voltage of constant pressure source two passages by RS232 line traffic control; Pi Anbiao gathers the electric current by detected materials sample when measuring equipment system awards signal, minimum current collection value is pA level, and flow to the robot calculator of measuring equipment system in digital form to carry out the data processing in later stage, Pi Anbiao can carry out program control, and precision is beneficial to the accurate of the volt-ampere characteristic of electricity material to be measured; By GPIB line, the robot calculator that the current value recorded passes to measuring equipment system is processed.
The inventive method adopts LabVIEW virtual instrument as platform, the measuring equipment system of efficient volt-ampere characteristic of electric material to be measured is connected into by constant pressure source, Pi Anbiao, computing machine, GPIB line and RS232 line, input constant voltage scope and interval and transformation scope and interval, just automatically can measure the change curve of electric current along with voltage, measuring voltage is automatically measured in the interval of 0-30V; Measurement data is directly stored in txt textual form in the robot calculator of measuring equipment system, and make the two-dimensional diagram of voltage and current, save time and the complicacy of post-processed data, find out the trend of electric current with change in voltage according to chart during measurement, simple, intuitive; Its overall measurement Method And Principle is reliable, and measure accurately, data analysis is directly perceived, and simple to operate, save time, result intuitive display, cost is low, is suitable for the voltammetric characteristic measuring to multiple electricity material.
Accompanying drawing illustrates:
Fig. 1 is workflow structural principle schematic block diagram of the present invention.
Embodiment:
Also be described further by reference to the accompanying drawings below by embodiment.
Embodiment:
The step of the concrete measurement testing resistance material sample of the present embodiment is as follows:
(1), by detected materials sample weld out three terminals, sample is placed in a stable environment, according to circuit diagram, sample three terminals are connected on two passages of this constant pressure source of IDEC respectively, and Keithley 6485 Pi Anbiao is connect in the line;
(2), title interface inputting detected materials sample is being measured, need to be added in the constant voltage scope on sample and change interval, change voltage range and interval, gather the time interval of current wait, click and start the store path (being defaulted as desktop) that the rear prompting according to robot calculator inputs a measurement data;
(3), the currency initial value of voltage range (be for the first time change) of change voltage passes to this constant pressure source of IDEC by RS232 line by program, controls a passage and exports a burning voltage and be added on sample;
(4), after the time interval of input, Keithley 6485 Pi Anbiao samples to the electric current by sample, and passes to robot calculator through GPIB bundle of lines current value;
(5), program compares change voltage current value and the transformation scope of input, if within the scope of transformation, then changes after magnitude of voltage increases transformation interval and performs (3) step; If exceed transformation scope, then perform (6) step;
(6), program compares the constant voltage scope of constant voltage currency and input, if within the scope of constant voltage, then constant voltage values increases constant voltage interval, and transformation scope initial value is assigned to change voltage, then performs (3) step; If exceed constant voltage scope, then terminate program;
(7), the current value gathered under change voltage and current voltage composition one-dimension array is stored in the file that (2) step specifies, then line feed records once tested data immediately below this, finally become the array of capable 2 row of n, wherein n is pendulous frequency;
H, repeat (3), (4), (5), (6) and (7) step until program stopped, in specified file, demonstrate result.
The device that the present embodiment realizes comprises selects this constant pressure source of IDEC, Keithley 6485 Pi Anbiao, robot calculator, GPIB line and RS232 line, and each parts electricity information communication forms volt-ampere characteristic of electric material measuring equipment system; Use two passages of this constant pressure source of IDEC, the voltage of stable output respectively, voltage source is provided to stablize, applying voltage range is 0-30V, as the accurate volt-ampere characteristic of electricity material to be measured that will measure, only voltage spaces need be reduced, make image data intensive, use two passages of a Pi Anbiao, simplify power supply number, cost-saving, easy and simple to handle, be easy to connect; Use this constant pressure source of RS232 line traffic control IDEC simultaneously, program exports the order of a required voltage value, and pass to constant pressure source by RS232 line, constant pressure source is made a response immediately, exporting relevant voltage is added on electricity material to be measured, RS232 line low price, is connected simply with computer; Keithley 6485 Pi Anbiao, according to magnitude of voltage added on electricity material to be measured, export the current electric current by electricity material to be measured, the minimal level can surveying electric current is 1pA, record the minimum current flowing through electricity material sample to be measured less, measuring accuracy is higher, be conducive to the volt-ampere characteristic of the electricity material measuring large resistance value, and flow to the computing machine of measuring equipment system in digital form to carry out the data processing in later stage, Pi Anbiao can carry out program control and precision is beneficial to greatly the accurate of volt-ampere characteristic; Utilize GPIB line, the computing machine that the data recorded by Pi Anbiao return to measuring equipment system is further processed, and value rapidly, fast.
Claims (2)
1. a measuring method for volt-ampere characteristic of electric material, is characterized in that concrete measuring process is:
(1), on electricity material sample to be measured, node weld is selected to go out three terminals, electricity material sample to be measured is placed in a stable environment, according to electrical principles figure, electricity material sample to be measured three terminals are connected on two passages of constant pressure source respectively, then Pi Anbiao is connect in the line;
(2) on the measurement interface of measuring equipment system, input the title of electricity material sample to be measured, be added in constant voltage scope on electricity material sample to be measured and change interval, change voltage range and interval (size at interval determines the data-intensive degree of volt-ampere characteristic measured) and gather time interval of current wait, click keys starts the store path starting the rear robot calculator according to a measuring equipment system prompting input measurement data, is defaulted as desktop;
(3), measuring equipment system will change voltage currency or be that the initial value of change voltage range passes to constant pressure source by RS232 line for the first time, control a passage and export a burning voltage and be added on electricity material sample to be measured;
(4), after the time interval of input, Pi Anbiao samples to the electric current by electricity material sample to be measured, and passes to the robot calculator of measuring equipment system through GPIB bundle of lines current value;
(5), measuring equipment system compares the voltage change range of change voltage current value and input, if changing in voltage range, then change after magnitude of voltage increases transformation interval and perform (3) step; If exceed transformation scope, then perform the step of (6);
(6), measuring equipment system compares the constant voltage scope of constant voltage currency and input, if within the scope of constant voltage, then constant voltage values increases constant voltage interval, and transformation scope initial value is assigned to change voltage, then performs the step of (3); If exceed constant voltage scope, then terminate to run;
(7), the current value under the change voltage of collection and current voltage is formed in the file that step that one-dimension array is stored into (2) specifies, then line feed records once tested data immediately below this, finally form the array of capable 2 row of n, wherein n is pendulous frequency;
(8), repeat (3), (4), (5), (6) and (7) step until measure working procedure stopping, completing and measure and export.
2. the measuring method of volt-ampere characteristic of electric material according to claim 1, the measuring equipment system that it is characterized in that realizing voltammetric characteristic measuring comprises constant pressure source, Pi Anbiao, data acquisition board, GPIB line, RS232 line and robot calculator, is communicated with forms volt-ampere characteristic of electric material measuring equipment system according to telecommunications breath measuring principle; The value output voltage that constant pressure source is specified according to measuring equipment system, voltage range is 0-30V, input channel is three, be added in three ends of electricity material sample to be measured respectively, a passage is used to provide constant voltage, under its constant voltage, the voltage using another passage to provide to gradually change measures the electric current by electricity material to be measured; The program using LabVIEW to write, is added in the magnitude of voltage of constant pressure source two passages by RS232 line traffic control; Pi Anbiao gathers the electric current by detected materials sample when measuring equipment system gives signal, minimum current collection value is pA level, and flow to the robot calculator of measuring equipment system in digital form to carry out the data processing in later stage, Pi Anbiao can carry out program control, and precision is beneficial to the accurate of the volt-ampere characteristic of electricity material to be measured; By GPIB line, the robot calculator that the current value recorded passes to measuring equipment system is processed.
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| CN106291401A (en) * | 2016-10-14 | 2017-01-04 | 北京东方计量测试研究所 | A kind of sun square formation simulator C-V characteristic method of testing and test system |
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| US6816349B1 (en) * | 2002-06-27 | 2004-11-09 | Micrel, Inc. | Integrated power switch with current limit control and a method of use |
Non-Patent Citations (3)
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| 基于LabVIEW的三极管特性测试仪的设计;靳莹瑞;《科技信息》;20111231(第22期);第113、116页 * |
| 基于NI Multisim 10与LabVIEW的单结晶体管伏安特性测试;宗爱芹;《现代电子技术》;20101231(第10期);第149-151页 * |
| 隋琦.虚拟三极管伏安特性测试仪的设计.《山东理工大学学报(自然科学版)》.2008,第22卷(第5期),第88-90页. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106291401A (en) * | 2016-10-14 | 2017-01-04 | 北京东方计量测试研究所 | A kind of sun square formation simulator C-V characteristic method of testing and test system |
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Inventor after: Xu Sheng Inventor after: Chang Qing Inventor after: Zhang Changshuai Inventor after: Wang Yuehao Inventor after: Yuan Feng Inventor after: Xu Xiangang Inventor after: Xu Dan Inventor after: Jin Yali Inventor before: Xu Sheng Inventor before: Chang Qing Inventor before: Zhang Changshuai Inventor before: Wang Yuehao Inventor before: Yuan Feng Inventor before: Xu Xiangang Inventor before: Xu Dan Inventor before: Jin Yali |
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