From MEMS chips to smart sensor modules, China's sensor industry chain is undergoing profound structural transformation. This article systematically analyzes the core segments of upstream, midstream and downstream industries, and explores key opportunities in the localization process.

In the first half of 2026, the smart building industry entered a "deep-water transformation" phase driven by policy dividends, technological breakthroughs, and market restructuring. Sensor and IoT technologies evolved from "single-point applications" to "systematic integration," with AI empowerment, digital twins, and edge computing accelerating deployment. This article reviews the industry's development from five dimensions: policy environment, technological breakthroughs, market landscape, supply chain changes, and H2 outlook.

With the deep integration of IoT sensors and AI technologies, building operations are undergoing a revolutionary shift from reactive response to proactive prediction. This article explores the application value and technical pathways of AI+IoT in building operations.

Air conditioning energy efficiency,sensors,building automation,energy monitoring,intelligent control,temperature humidity sensors,CO2 sensors,differential pressure sensors,current sensors,VAV,demand response,predictive maintenance

Global smart building market surpasses USD 380 billion in 2026. This article analyzes competitive dynamics across China, US, and Europe, interpreting competitive landscape and future trends.

In building MEP systems, pumps are one of the most significant power consumers, accounting for 15%-25% of total building energy use. Traditional pumps operate at fixed frequency and constant speed, maintaining full power output regardless of load variation, resulting in substantial energy waste. The introduction of Variable Frequency Drive (VFD) technology provides a revolutionary solution for pump energy savings. Basic Principles of VFD Control Pump shaft power is proportional to the cube of rotational speed (P ∝ n³) and to the cube of flow rate. This means: a 20% flow reduction can lower power by approximately 49%; a 50% flow reduction can lower power by approximately 87.5%. VFD control adjusts motor supply frequency to change pump speed, precisely matching actual flow demand and avoiding the energy losses caused by traditional throttling valve regulation. Common VFD Control Strategies Constant Differential Pressure Control: Maintains constant supply-return water pressure differential, suitable for chilled water systems in central air conditioning. When end-load decreases, pump speed is automatically reduced to maintain the pressure differential. Constant Temperature Differential Control: Maintains constant supply-return water temperature differential, suitable for heating systems. Pump speed is adjusted based on temperature differential deviation to ensure optimal heat exchange efficiency. Multi-Pump Parallel Optimization: When multiple pumps operate in parallel, the system automatically starts/stops pump units based on load size and coordinates pump speeds to operate at the highest efficiency point. Measured Energy Saving Results Case study of a commercial complex chilled water system retrofit: - Before: 3 × 55kW pumps at fixed frequency, annual consumption ~385,000 kWh - After: VFD installation with constant differential pressure control - Annual consumption reduced to ~185,000 kWh, saving rate 52% - Investment payback period ~1.8 years Selection and Implementation Key Points VFD selection should consider: power margin (recommend one size larger), harmonic suppression (input/output reactors), protection rating (IP54 or higher), communication interfaces (BAS integration support). Sensor deployment: supply-return main pipe differential pressure sensor, temperature sensors, flow meter, signals connected to DDC controller. Important Considerations VFD control is not a universal solution. Note: minimum operating frequency limit (typically not below 30Hz to prevent motor overheating); minimum pump flow limit (to prevent cavitation and overheating); hydraulic balance retrofit (to ensure system stability within the VFD regulation range). Conclusion Pump VFD control is a mature and highly effective energy-saving technology in building MEP systems. Driven by the "dual carbon" goals, VFD retrofit of existing building pump systems will see tremendous market opportunity.

This article shares the construction practice of a university smart campus energy management system, covering system architecture design, sensor deployment strategies, platform functional modules, and implementation effects, providing a reference for educational building energy management.