Method for measuring volt-ampere characteristic of electric material

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: [0001] The invention belongs to the technical field of measurement of volt-ampere characteristics of electrical materials, and relates to a method for measuring the volt-ampere characteristics of electrical materials by using a constant voltage source, a picoammeter, a computer and LabVIEW software. Save the measurement data, and display the two-dimensional graph of voltage-current, especially the change of the volt-ampere characteristic of the resistance material or the triode material, which belongs to a technical scheme of measuring the volt-ampere characteristic of electrical materials based on LabVIEW. Background technique: [0002] With the rapid development and wide application of materials science, new materials are constantly emerging, and their related application research has also attracted the interest of many researchers. The performance test and use of a new material mostly need to know its volt-ampere characteristic change. The volt-ampere ch...

AI Technical Summary

Problems solved by technology

The traditional volt-ampere characteristic measuring instrument can only measure a set of voltage and current values ​​at a time. It is necessary to give a voltage value to the material, and then read the current value while recording the voltage value after the ammeter reading is stable, which is laborious and time-consuming. It is too accurate and the data cannot be automatically saved, and after the measurement is completed, data processing is required to convert the resistance value into resistivity. However, some existing relatively advanced measuring instruments, such as PPMS, can measure automatically, and their errors are very small. However, the investment in these equipment and instruments is relatively large, and it is unaffordable for general units and scientific research institutions, and it is not easy to popularize and use them, and the operation steps are complicated; The measurement steps are cumbersome, the measurement input cost is high, and the measurement results and data accuracy are poor, etc.

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