Vehicle Access Activation With Obstacle-Aware Transceiver Polling
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Solution Overview
Problem
Existing vehicle access systems using cell phones for authentication consume excessive battery power due to repeated polling for UWB or BLE signals, leading to potential vehicle starting issues when parked for extended periods.
Innovation Solution
A method and device that utilize a driver assistance system to detect stationary obstacles and adjust transceiver transmission parameters, such as range and frequency, to optimize polling and identification phases, reducing power consumption by deactivating or modifying transceivers facing obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repeated polling for UWB or BLE signals is performed to detect portable access equipment, then the reliability of hands-free access is improved, but the battery power consumption increases excessively
Solution Approach 1:
The patent applies dynamics by making the polling frequency adaptive rather than static. The system dynamically adjusts the polling frequency based on whether an obstacle is detected: using a first (higher) frequency when no obstacle is present and a second (lower) frequency when an obstacle is detected. This dynamic adjustment resolves the contradiction by maintaining high detection reliability when possible while reducing power consumption when obstacles are present.
Solution Approach 2:
The patent changes the parameter of polling frequency based on obstacle detection conditions. By switching between a first polling frequency (when no obstacle is detected) and a second polling frequency (when obstacle is detected), the system optimizes the balance between detection reliability and power consumption, directly addressing the technical contradiction.
2Area of stationary object
If transceivers are activated in all directions to ensure comprehensive detection coverage, then the detection coverage is improved, but the power consumption increases
Solution Approach 1:
The patent applies local quality by making transceiver activation conditional on local environmental conditions (obstacle presence). Instead of uniformly activating all transceivers, the system selectively activates only those transceivers whose transmission paths are not blocked by obstacles. This resolves the contradiction by maintaining adequate detection coverage in unobstructed areas while reducing power consumption by deactivating transceivers facing obstacles.
3Use of energy by moving object
If polling frequency is reduced to save battery power, then the power consumption is reduced, but the user wait time increases
Solution Approach 1:
The patent uses dynamic polling frequency adjustment to resolve the time-power contradiction. When no obstacle is detected, the system uses a higher first polling frequency that reduces user wait time. When obstacles are detected, it switches to a lower second polling frequency that saves power. This dynamic approach ensures that the system maintains responsive detection when conditions permit while conserving energy when necessary.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces battery discharge by selectively activating transceivers not obstructed by stationary objects, enhancing detection reliability and extending vehicle readiness without prolonged user wait times.
Implementation Method 1
a driver assistance system with means for detecting and identifying obstacles by means of radar, lidar or camera
Implementation Method 2
a driver assistance system with means for detecting and identifying obstacles by means of radar, lidar or camera
Implementation Method 3
The vehicle repeatedly transmits UWB or BLE signals in a predetermined wide area around the vehicle
Data Source
AI summary
A method for activating a function of a motor vehicle by an activation device including a plurality of transceivers capable of transmitting to the world outside the vehicle, from portable access equipment carried by a user. Activation of the function being triggered by detection of the presence of the user in a predetermined area around the vehicle during a polling phase, and depending on a result of authentication of the portable access device by the vehicle during an identification phase, the vehicle being equipped with a driver assistance system including a device for detecting and identifying obstacles in an environment nearby the vehicle. The method including: detection by the driver assistance system of at least one stationary obstacle in the predetermined area, and identification of the obstacle; and polling and identifying, modification of the transmission parameters of the transceivers transmitting in the direction of the obstacle thus detected and identified.