A vehicle approach warning apparatus for abnormality detection in various abnormal modes is provided. In the vehicle approach warning apparatus, a sound generator output from the microcomputer (21) passes an AMP (22) and HPF (24), and an output voltage VOUT corresponding to the sound generator output is applied to a speaker 3 to emit vehicle approach sound. The vehicle approach warning apparatus includes a voltage sensor circuit (25) and outputs a check usage output as the sound generator output at the abnormality detection. A single frequency output that is within a resonance frequency band of the speaker and that can be poorly reproduced by the speaker is used as the check usage output. The abnormality detection is performed based on whether an integration circuit voltage outputted from the voltage sensor circuit 25 is within a voltage range being an abnormality determination threshold.
VEHICLE APPROACH WARNING APPARATUS
VORRICHTUNG ZUR WARNUNG VOR EINER FAHRZEUGANNÄHERUNG
DISPOSITIF D'AVERTISSEMENT DE L'APPROCHE D'UN VÉHICULE
2017-05-17
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 / B06B GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL , Erzeugen oder Übertragen mechanischer Schwingungen allgemein / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G08B SIGNALLING OR CALLING SYSTEMS , Signalisier- oder Rufsysteme / H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS , Lautsprecher, Mikrofone, Schallplatten-Tonabnehmer oder ähnliche akustische, elektromechanische Wandler |