Fogging windows are a common and dangerous driving hazard. When the air conditioner blows cold air directly onto the side windows, and the window glass temperature is lower than the dew point temperature of the air inside the car, moisture will condense on the glass surface, forming fog. Once the side windows and rearview mirror area fogs up, the driver will not be able to clearly see the rearview mirror and the road conditions to the side, greatly increasing the risk when changing lanes, reversing, and turning.
Traditional defogging methods rely entirely on manual operation: the driver needs to detect fogging → assess the severity → manually turn on the defroster button → adjust the airflow and temperature. This process is not only cumbersome, but more importantly, it distracts the driver while driving, which is itself a safety hazard. Furthermore, manual defogging often involves strong cold or hot air blowing directly onto the windows, causing a sudden change in the interior temperature and affecting passenger comfort.
A Technological Leap from "Passive Defogging" to "Active Antifogging"
MFrontier Technology has launched a fusion sensing solution combining an infrared thermopile array and an absolute humidity sensor to achieve predictive active antifogging, intervening before fog forms.
The system consists of three core modules:
Comprehensive Temperature Field Sensing: An infrared thermopile array collects real-time temperature distribution data across the entire glass surface, including side windows, front windows, and rearview mirrors, accurately identifying temperature differences in different areas and pinpointing "low-temperature zones"—the locations most prone to fogging.
Coordinated Temperature and Humidity Monitoring: Combined with an absolute humidity sensor, the system monitors the absolute humidity and ambient temperature inside the cabin in real time, obtaining key parameters needed for fogging risk calculations.
Intelligent Dew Point Prediction: The system incorporates a dedicated dew point algorithm that compares glass surface temperature data with the cabin dew point temperature in real time to calculate the critical fogging conditions for each glass area. When the glass temperature in a certain area is about to fall below the dew point temperature, the system issues an early warning and locks onto the target area.
Precise Intervention
Before the windows fog up, the system automatically activates the vehicle's HVAC system, intelligently adjusting the airflow angle, direction, and hot/cold air ratio to precisely direct airflow towards the fog-prone glass areas. By intervening with airflow, it balances the temperature and humidity on the glass surface, disrupting the conditions for fog formation.
The entire process requires no manual operation from the driver; the air conditioning system automatically handles all decisions and execution. This truly achieves permanently fog-free side windows and rearview mirrors, maintaining clear visibility at all times, ensuring every journey is clear, safe, and comfortable.
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