Blind Spot Monitoring (BSM or BLIS for short) primarily employs three technical types: ultrasonic, millimeter-wave radar, and vision-based systems. Vision-based systems capture images via cameras; while they provide intuitive blind spot visualization, their imaging performance deteriorates in rain, fog, or low-light conditions. The current mainstream solution is 77GHz millimeter-wave radar, which features strong penetration capability and environmental adaptability, achieves a detection range exceeding 70 meters, reliably identifies the movement status of side and rear vehicles, and alerts drivers through multi-stage warnings (such as indicator flashes, audible alerts, or steering wheel vibrations). Some premium models additionally adopt a sensor fusion approach combining radar and cameras, utilizing image recognition algorithms to reduce false positives, and may even incorporate automatic steering intervention functionality. Installation typically requires rearview mirror lens replacement for seamless integration, while routine maintenance involves keeping sensors clean to ensure optimal performance. This system proves particularly valuable during high-speed lane changes, in adverse weather conditions, and for nighttime driving, though drivers must still maintain active situational awareness rather than relying solely on electronic assistance.
