Cleanroom Monitoring Solution Based on ARM Edge Controller

Cleanrooms, as highly controlled environments, are widely used in industries such as semiconductor manufacturing, biopharmaceuticals, and medical device production, where stringent requirements for environmental cleanliness and safety are paramount. In particular, real-time, precise data collection and rapid response mechanisms are critical for leak detection and access control in cleanrooms. Traditional centralized monitoring systems often suffer from data transmission delays and insufficient device integration, making them inadequate for meeting the demands of modern cleanrooms for efficient and intelligent management.

With the advancement of Industrial Internet of Things (IIoT) and edge computing technologies, ARM-based edge controllers have emerged as key devices for enhancing environmental safety and intelligent management in cleanrooms.

Solution Architecture

Core Device: ARMxy Edge Computing Controller

The ARMxy series edge controller is equipped with a high-performance ARM processor and versatile interfaces (e.g., Ethernet, RS485/RS232, DI/DO/AIO), supporting multiple industrial communication protocols to accommodate diverse field devices. This controller not only enables local data acquisition and real-time control but also seamlessly integrates with central control systems via network connectivity for remote monitoring and management.

Key Sensor Modules

• Liquid Leak Sensors: Real-time detection of liquid leaks on the cleanroom floor or at critical equipment, ensuring environmental safety.
• Temperature and Humidity Sensor Modules: Continuous monitoring of cleanroom environmental parameters to ensure compliance with process standards.
• Access Control Card Readers: Enable secure and organized personnel access management for cleanroom entry and exit.

Communication Protocols and Data Transmission

Field devices communicate with the ARM edge controller using standard protocols such as Modbus RTU (serial) or Modbus TCP (Ethernet). The controller preprocesses data, performs alarm logic judgments, and transmits the processed data to upper-level central control systems (e.g., SCADA, DCS, or cloud platforms) via the network.

Specific Functions and Advantages

• Real-Time Environmental Data Acquisition and Monitoring
  The ARM edge controller periodically collects data from liquid leak sensors and environmental sensors, displaying real-time environmental conditions. Upon detecting anomalies (e.g., excessive leaks or deviations in temperature/humidity), it immediately triggers local alarms (e.g., audible-visual alarms) and synchronously notifies the central control system for rapid response.
• Automated Logic Control
  The controller features flexible logic programming, allowing automated control strategies to be configured based on site-specific process requirements. For example, in the event of a leak alarm, it can automatically close relevant valves or activate exhaust systems to minimize risks.
• Access Control Management
  Integrated with access control card readers, the controller monitors cleanroom access status in real-time, logs personnel entry/exit records, and supports hierarchical access authorization. Access event data is uploaded to the central system via standard protocols for security auditing and tracking.
• Remote Monitoring and Centralized Data Management
  As an intelligent on-site node, the edge controller aggregates environmental and access data, transmitting it via Ethernet or wireless networks. Combined with upper-level platforms, it enables unified monitoring and historical data analysis, supporting continuous optimization of cleanroom environments.

Application Case Study

In a semiconductor cleanroom project, the ARMxy edge controller was deployed to connect over 20 liquid leak sensors, 10 temperature and humidity modules, and multiple access control card readers. The system successfully achieved real-time multi-point data acquisition, automated alarms, and access control management, significantly enhancing the cleanroom’s safety and operational efficiency.

Conclusion

The cleanroom leak detection and access control solution based on the ARM edge controller, with its high integration, reliability, and scalability, enables intelligent management of cleanrooms, ensuring environmental safety and production continuity. It represents a vital technological approach for modern cleanroom management.