A proximity alarm device includes a microcomputer, a speaker, an electric board, and a board temperature sensor housed in a housing of the proximity alarm device. The board temperature sensor is mounted on a sensor mounting surface of the electric board, and outputs board temperature information indicating the detected board temperature to the microcomputer. An arithmetic unit of the microcomputer estimates and calculates the speaker temperature based on the board temperature information, and a correcting unit corrects the approach notification sound based on the estimated and calculated speaker temperature.
PROXIMITY ALARM DEVICE
2024-08-29
Patent
Electronic Resource
English
IPC: | B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES |
European Patent Office | 2017
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