Design of level and pressure monitoring system for liquid oxygen tank
10.19745/j.1003-8868.2025044
- VernacularTitle:液氧罐液位及压力监控系统设计
- Author:
Xu YIN
1
;
Guan-jun CHEN
1
Author Information
1. 江苏省省级机关医院临床医学工程科,南京 210024
- Publication Type:Journal Article
- Keywords:
liquid oxygen tank;
liquid level monitoring;
pressure monitoring;
liquid oxygen
- From:
Chinese Medical Equipment Journal
2025;46(3):27-34
- CountryChina
- Language:Chinese
-
Abstract:
Objective To design an easy-to-operate and cost-effective liquid oxygen tank level and pressure monitoring system to achieve real-time monitoring and automatic alarm for liquid oxygen level and oxygen pressure.Methods A liquid oxygen tank level and pressure monitoring system was developed with a STC89C52 microcontroller as the core control unit and the components of a master machine and a slave machine.The hardware part of the system was composed of a liquid oxygen level detection module,an oxygen pressure measurement module,a wireless transmission module and an alarm module.The liquid oxygen level detection module consisted of a CYJ-3 electronic differential pressure gauge and an I/V conversion circuit;the oxygen pressure measurement module involved in a LST-131 pressure transmitter;the wireless transmission module adopted an ANT-E31-T50S2 chip;the alarm module was made up of a buzzer and the GSM.The software of the system was programmed with C language and compiled by Keil software.The system had its performance verified by testing its functions for data transmission,data accuracy and analog alarm.Results The experiments proved the system developed gained advanta-ges in data transmission and real-time display;the system had the data accuracy not lower than 95％;the system behaved well in analog alarm with the rate of missed SMS not higher than 5％.Conclusion The system developed can be used for liquid oxygen level and pressure monitoring,and provides support for the stable operation of the central oxygen supply system.[Chinese Medical Equipment Journal,2025,46(3):27-34]
