Development of a Data Acquisition System for Monitoring Environmental Parameters of Laboratories

Abstract

Currently, industrial sensors employing RS-485 communication channel are widely used. A large variety of such sensors allows a wide range of tasks to be solved. The RS-485 communication link allows the simultaneous use of up to 128 sensors, which in turn leads to the need for a data acquisition system, as well as the output of these sensors in a convenient form for the end-user. In accordance with this, this paper is devoted to the development of a sensor data acquisition system using an RS-485 communication channel. This data acquisition system contains an RS-485 communication link, an Ethernet link for data output to the end user, and a USB link used for debugging and controlling the board firmware. The control board uses a single-board computer Raspberry PI compute Module 3. This article discusses the main protection schemes of the channels used, the main schemes necessary for the correct operation of Raspberry Pi Compute Module 3, as well as the basic principles of the data acquisition system.KeywordsData acquisition systemProtection circuitsRS-485EthernetUSB