Calibration for wireless localization and detection of vulnerable road users
AssigneeNEC Corporation
InventorsGurkan Solmaz, Jonathan Fuerst
Life of this patent
Estimating the term…
Abstract
A method for localization of a vulnerable road user (VRU) includes receiving a received signal strength indication (RSSI) level of a wireless signal of a mobile device carried by the VRU detected by a wireless sensor in an area of interest. The detected RSSI level is compared to RSSI fingerprints stored in a fingerprinting database (DB) so as to identify an RSSI fingerprint having a closest match to the detected RSSI level. The VRU is localized at a position stored in the fingerprinting DB for the identified RSSI fingerprint.
Claims20
A method for localization of a vulnerable road user (VRU), the method comprising:
- calibrating for wireless localization by:
- labelling an object at or near an area of interest, wherein the object is a person or a robot carrying one or more mobile devices;
- tracking the object as it moves in the area of interest using one or more cameras;
- detecting received signal strength indication (RSSI) levels of the one or more mobile devices as the object moves in the area of interest;
- estimating, for each time one of the RSSI levels is detected, a location of the object based on the tracking of the object;
- and
- saving the detected RSSI levels together with the corresponding estimated locations as RS SI fingerprints in a fingerprinting database (DB);
- detecting an RSSI level of a wireless signal of a mobile device carried by the VRU detected by a wireless sensor in the area of interest;
- comparing the detected RSSI level of the wireless signal of the mobile device carried by the VRU to the RSSI fingerprints stored in a fingerprinting database (DB) so as to identify one of the RSSI fingerprints having a closest match to the detected RSSI level of the wireless signal of the mobile device carried by the VRU;
- and
- localizing the VRU at a position stored in the fingerprinting DB for the identified RSSI fingerprint.
A method of calibrating for wireless localization and building a fingerprinting database (DB), the method comprising:
- labelling an object at or near the area of interest, wherein the object is a person or a robot carrying one or more mobile devices;
- tracking the object as it moves in the area of interest using one or more cameras;
- detecting received signal strength indication (RSSI) levels of the one or more mobile devices as the object moves in the area of interest;
- estimating, for each time one of the RSSI levels is detected, a location of the object based on the tracking of the object;
- and
- saving the detected RSSI levels together with the corresponding estimated locations as RSSI fingerprints in the fingerprinting DB.
A calibration system for wireless localization, the system comprising:
- one or more cameras disposed in an area of interest and configured to track an object as it moves in an area of interest using a label applied to the object, wherein the object is a person or a robot carrying one or more mobile devices;
- at least one wireless sensor disposed in the area of interest and configured to detect received signal strength indication (RSSI) of the one or more mobile devices;
- a computer vision-based module configured to estimate, for each time one of the RSSI levels is detected, a location of the object based on the tracking of the object;
- and
- a fingerprinting database (DB) storing the detected RSSI levels together with the corresponding estimated locations as RSSI fingerprints.
Dependencies are inferred from the claim text.