Design of Temperature and Humidity Remote Monitoring System Based on STC89C52 Single Chip Computer

Single chip microcomputer STM32L151CCU6

L0504-Murata muRata common mode inductor 90Ω 150mA

Temperature and humidity sensor STC89C52

Summary

This paper introduces a remote monitoring system for temperature and humidity inside the equipment cabin of an unmanned aerial platform. The system is built around the STC89C52 microcontroller as the main control unit and uses LabVIEW as the development environment. It enables real-time monitoring of environmental conditions during flight, ensuring that the equipment remains within safe operating limits. If the temperature or humidity exceeds predefined thresholds, the system triggers an alarm and automatically adjusts the conditions to maintain optimal performance. This ensures accurate data collection and reliable operation of the mission-critical equipment.

0 Preface

Unmanned aerial platforms have become essential in testing electronic systems. However, monitoring the internal environment of these platforms during flight has been challenging. Traditional ground-based meteorological methods are not sufficient for real-time data collection. As a result, there has been a gap in ensuring the accuracy and reliability of test data. To address this issue, a remote monitoring system was developed to continuously track and manage the temperature and humidity inside the equipment cabin of an unmanned aerial platform.

1 System Structure and Overall Design

The system consists of two parts: airborne and ground-based components. The airborne section includes a power module, core control unit, temperature and humidity sensors, digital display, keyboard interface, temperature control system, and communication module. On the ground, monitoring software runs on the command post to receive and analyze data. The core control module collects and processes sensor data, displays it on the digital screen, and sends it via a wireless link to the ground station. This allows operators to monitor and adjust conditions remotely, ensuring continuous and accurate data acquisition.

1.1 Power Module

The power module provides stable voltage to all components, ensuring reliable operation of the system under various conditions.

1.2 Core Control Module

The STC89C52 microcontroller serves as the central processing unit. It handles data acquisition, processing, and transmission, making it a flexible and efficient solution for real-time monitoring tasks.

1.3 Temperature and Humidity Sensor

A SHT10 sensor is used to measure both temperature and humidity. It offers high accuracy with a wide range, low power consumption, and reliable performance, making it ideal for this application.

1.4 Keyboard Module

The keyboard allows users to set thresholds, perform self-tests, and reset the system when needed.

1.5 Digital Tube Display Module

This module provides a visual output of current temperature and humidity readings, helping operators monitor the status during ground testing.

1.6 Communication Module

The communication module acts as a bridge between the onboard system and the ground station, enabling seamless data transfer and remote control commands.

1.7 Temperature and Humidity Control System

If conditions exceed the allowed range, the control system activates to bring the environment back to normal, ensuring consistent performance of the equipment.

2 System Software Design

2.1 Airborne Core Control Module Software

The software is written in C and manages all functions, including data acquisition, display, control, and transmission. It initializes the system, reads sensor data, and sends it to the ground station after processing.

2.2 Ground Monitoring Software

Developed using LabVIEW, the software provides a user-friendly interface for real-time monitoring. It displays dynamic graphs, alerts operators when thresholds are exceeded, and allows remote control of the system through a web server.

The system integrates LabVIEW’s web server technology to enable remote access from the command post. This makes it easy for operators to monitor and manage the system from different locations, improving overall efficiency and response time.

3 Conclusion

This system successfully combines the STC89C52 microcontroller with LabVIEW to create a robust, user-friendly solution for real-time temperature and humidity monitoring in unmanned aerial platforms. Its compact design, ease of use, and reliable performance make it an effective tool for ensuring data integrity and operational safety during field tests.