On-vehicle device and determination method
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- KYOSAN ELECTRIC MFG CO LTD
- Filing Date
- 2025-11-27
- Publication Date
- 2026-06-11
Smart Images
Figure JP2025041432_11062026_PF_FP_ABST
Abstract
Claims
1. An on-board device mounted on a vehicle traveling on a track, comprising: a magnetic sensor unit having a plurality of magnetic sensor elements arranged in a predetermined positional relationship to detect a magnetic field generated by the magnetism of a magnetic material constituting the track; a detection unit that detects a magnetic field distribution based on the detected values of each of the magnetic sensor elements; and a determination unit that determines that a predetermined set position has been passed when a combination of similarity degrees of magnetic field distributions detected by the detection unit to each of a plurality of reference magnetic field distributions satisfies a predetermined condition.
2. The on-board device according to claim 1, wherein the setting position has a plurality of positions where the magnetic field distribution detected by the detection unit is different, and the determination unit identifies the setting position and determines passage by determining whether or not the conditions related to the combination of similarity defined for each setting position are met.
3. The on-board device according to claim 1 or 2, wherein the setting position has a plurality of positions with different magnetic field distributions detected by the detection unit, the sequence in which these setting positions arrive as the vehicle travels is associated, and the determination unit determines whether the vehicle has passed the next setting position by determining whether the conditions corresponding to the next setting position that arrives after the setting position that was determined to have been passed in the most recent past are met among the conditions related to the combination of similarity determined for each setting position.
4. A reference similarity is defined for each of the reference magnetic field distributions at the setting position, the determination unit calculates a calculated similarity of the magnetic field distribution detected by the detection unit for each of the reference magnetic field distributions, and determines the exact passing timing of passing the setting position based on the comparison result obtained by comparing the calculated similarity with the corresponding reference similarity, according to any one of claims 1 to 3.
5. The on-board device according to any one of claims 1 to 4, wherein the magnetic sensor unit has at least a plurality of magnetic sensor elements arranged in the left-right direction of the vehicle.
6. The on-board device according to any one of claims 1 to 5, wherein the magnetic sensor unit has at least a plurality of magnetic sensors arranged in a planar shape along the front, rear, left, and right directions of the vehicle.
7. The on-board device according to any one of claims 1 to 6, wherein the magnetic material is a rail.
8. A determination method for determining the passing position of a vehicle equipped with a magnetic sensor unit having a plurality of magnetic sensor elements arranged in a predetermined positional relationship to detect a magnetic field generated by the magnetism of magnetic materials constituting a track, the method comprising: detecting a magnetic field distribution based on the detected value of each of the magnetic sensor elements; and determining that the vehicle has passed a predetermined set position when a combination of similarity degrees of the magnetic field distributions to each of a plurality of reference magnetic field distributions satisfies a predetermined condition.