Evolution of Mass Concrete
Temperature Monitoring Technology

Temperature control in mass concrete construction determines structural safety and durability. Since 1994, the Huanyuduobiao® team has pioneered this field, driving the complete transformation of China's mass concrete temperature monitoring from "manual reading" to "cloud-based intelligence".

1. Pre-1994: The Manual Era

Before 1994, temperature monitoring relied entirely on mercury and alcohol thermometers. Workers inserted thermometers into pre-embedded pipes and manually recorded readings — inefficient, error-prone, and unable to provide real-time data.

2. 1994: Analog Signal Breakthrough (Jinan Bank Building)

In 1994, the team deployed China's first online real-time mass concrete temperature monitoring system at the Jinan Bank Building Project, using analog signal transmission and 8-bit PIC17F microcontrollers. This established the "sensor + signal transmission + automatic recording" paradigm.

3. Infrared Wireless — Audit Office Building

Infrared transmission technology was introduced to solve on-site wiring challenges, enabling distributed multi-point temperature monitoring without cables.

4. RS485 Bus — Zhengzhou Jianye Plaza

The RS485 communication protocol was formally adopted with 8051-series microcontrollers, enabling long-distance, multi-node networking and making full-field temperature monitoring of large raft foundations a reality.

5. Chip & Transmission Generational Leap

AVR series → Lora distributed field communication → 32-bit STM32 (ARM Cortex-M) with edge computing capability, laying the foundation for networking and intelligence.

6. Storage Revolution: TR Logger (SD Card + USB)

The TR high-capacity timer logger innovatively integrated SD card storage with USB interfaces, enabling "plug-and-play" data physical backup — engineers could export data via USB drives without network connectivity.

7. 2016: Cloud Era Dawn — TG System R&D

With nationwide 4G commercialization and declining IoT data costs, the TG (Cloud Timer Logger) system was launched. Core concept: "inherit existing strengths + overlay cloud capabilities" for "anytime, anywhere data access".

8. TG System Commercialization & Ecosystem

• Direct cloud connectivity — no local PC required
• Multi-mode positioning — GPS, BeiDou, and cellular triangulation
• Flexible configuration — web-based parameter adjustments
• Triple data redundancy — cloud + mini-SD + USB 2.0
• Multi-platform access — web, WeChat, Android app

TG has been deployed in landmark projects: Donghai Bridge, Hong Kong-Zhuhai-Macao Bridge, Shenzhen-Zhongshan Link, as well as overseas Belt & Road projects in Laos and Sri Lanka.

9. Post-2018: DG Data Gateway — Full-Factor Intelligent Curing

The DG (Data Gateway) system expands monitoring from temperature alone to nearly all on-site physical quantities, achieving closed-loop intelligent curing through cloud-based custom logic.

Multi-source sensing: Concrete temperature, cooling water systems (flow meters, inlet/outlet temperature differentials), atmospheric parameters (full weather station), and structural/equipment states (osmotic pressure, frequency, valve positions).

Edge control: DG links to 16-channel relay controllers, CDI-E100 variable frequency drives (pump speed), and electric proportional ball valves (flow control), forming a complete "sense → decide → execute" loop.

Technology Leap Overview

Conclusion

From the first embedded code in 1994 to DG's full-factor intelligent curing, Huanyuduobiao® has evolved across four dimensions:

As 5G, edge computing, and AI algorithms further integrate, the technology will continue evolving toward greater intelligence and autonomy.