|Table of Contents|

Design of portable miniature capacitance tester(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2019年02期
Page:
85-88
Research Field:
测控与实验
Publishing date:

Info

Title:
Design of portable miniature capacitance tester
Author(s):
DUAN Wenhao; MA Xin; GENG Weiguo
(Beijing Institute of Aerospace Testing Technology, Beijing 100074,China)
Keywords:
capacitance measurement;  portable;  MSP430 microcontroller;  intelligent instruments
PACS:
V433
DOI:
-
Abstract:
In order to conveniently measure the capacitance value of the capacitance level gauge in the tank of the liquid rocket engine test bench, a portable capacitance measuring instrument was designed.The system is a digital portable test instrument based on MSP430F449 microcontroller.It realizes high-precision data acquisition by using 12-bit high-speed A/D converter embedded in the single-chip microcomputer, and displays the capacitance value through LCD12864.In this paper, the design principle and implementation method of the intelligent measuring instrument were elaborated from three aspects: capacitance detection principle, system hardware circuit design and microcontroller software programming.The instrument has a three-terminal measuring function that can measure the capacitance of a capacitive sensor with a long cable.The capacitance measurement range is from 10～9 999 pF with accuracy of 1 pF.

References:

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Memo

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Last Update: 2019-04-30