Design of Ultrasonic Liquid Level Sensor Based on STM32 with MODBUS Protocol

DOI

10.2991/isaeece-16.2016.11How to use a DOI?

Keywords

Artificial Liver; STM32; Ultrasonic; MODBUS Protocol

Abstract

In the process of blood transfusion in artificial liver, the liquid level of blood inside the dropper must be monitored in real time to ensure the stability and safety of transfusion. According to the requirement of the liquid level detection, we designed a kind of ultrasonic liquid level sensor based on STM32 and MODBUS protocol. Combined with 40KHz ultrasonic transceiver probes and signal amplification circuits, real-time monitor was implemented by STM32 with its built-in PWM and AD convert modules. The parameters of sensor can be modified by MODBUS commands to adjust the sensitivity, stability and reliability. The sensor had the advantages of simple structure, low cost, high sensitivity. And the experimental results showed that the sensor was applicable to artificial liver systems.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yanlong He
AU  - Changzhe Wu
AU  - Xiaolin Huo
PY  - 2016/04
DA  - 2016/04
TI  - Design of Ultrasonic Liquid Level Sensor Based on STM32 with MODBUS Protocol
BT  - Proceedings of the 2016 International Symposium on Advances in Electrical, Electronics and Computer Engineering
PB  - Atlantis Press
SP  - 51
EP  - 55
SN  - 2352-5401
UR  - https://doi.org/10.2991/isaeece-16.2016.11
DO  - 10.2991/isaeece-16.2016.11
ID  - He2016/04
ER  -