Liquid level sensor

• Main Authors: CUI JIN, QU YUFENG, DONG SHAOPENG, JIAO ZONGXIA, KONG FANXING, YIN YUANQING, YUAN MEI
• Format: Patent
• Language: Chinese; English
• Published: 25.10.2022
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING

The invention relates to the technical field of liquid level measurement, in particular to a liquid level sensor which comprises a first diaphragm, a second diaphragm and a tubular shell, the first diaphragm and the second diaphragm are connected with two open ends of the shell in a sealed mode respectively, and the gas pressure intensity of an inner space defined by the first diaphragm, the second diaphragm and the shell is the same as the atmospheric pressure intensity; the shell is a rigid member, and the first diaphragm and the second diaphragm have the same stress-strain property; the surfaces, located in the internal space, of the first diaphragm and the second diaphragm are each provided with a fiber bragg grating, the fiber bragg gratings are connected with a measuring instrument through optical fibers, and the liquid level is measured through the sensitivity of the first diaphragm and the second diaphragm to the internal pressure change of liquid and the sensitivity of the fiber bragg gratings to the