PRESENCE-BASED VEHICLE ACCESS DOOR RELEASE USING DIGITAL KEY LEVERAGING ULTRASONIC SENSING

Smart overview of the Invention

The patent application describes a method for vehicle access control using a digital key and ultrasonic sensing. A digital key signal is generated via a mobile device, such as a smartphone, in possession of the vehicle user. This signal is received by a virtual key control module (VKCM) and communicated to a vehicle controller. The system detects the user's presence near the vehicle using ultrasonic sensors, which then communicate this information to the vehicle controller. The controller commands the door to release based on both the digital key signal and the user's detected presence.

Functionality

The system integrates a mobile device and vehicle technology to streamline vehicle access. The digital key signal, typically utilizing Bluetooth Low Energy (BLE), is sent from the user's mobile device. The VKCM receives this signal and wakes up the vehicle controller if it's in sleep mode. Ultrasonic sensors detect the user's proximity to the vehicle, ensuring they are close enough for door release. This dual verification—digital key and presence detection—enhances security and convenience.

Technical Components

The ultrasonic sensing arrangement includes an ultrasonic sensor and processing module (UPM). The UPM collects analog data around the vehicle's access door and converts it into digital echo data. This data is processed to verify user presence and is communicated to an access control module (ACP). The ACP transforms this data into object data, which is sent to the vehicle controller with a request to release the door if conditions are met, such as user proximity and stationary status.

Operational Details

The system's operation involves various states of readiness. Both the vehicle controller and ultrasonic sensing arrangement can be in sleep mode when the vehicle is parked. Upon receiving a digital key signal, these components are activated to perform their functions. The UPM evaluates user movement to determine if they are stationary within a defined threshold, ensuring that accidental or unauthorized access is minimized.

Vehicle Integration

The described system is integrated into vehicles with multiple access points, such as side doors and cargo enclosures. Each access door has a mechanism with a latch that can be released electronically. The system includes energy storage for power supply and may feature both exterior and interior release switches for convenience. This technology is applicable across different vehicle body styles, including sedans, SUVs, and vans, offering flexible solutions for modern vehicular access needs.