vehicle approaching notification device

Abstract

The vehicle approach notification device is provided with: a first utterance voltage waveform signal generation unit, a first utterance output generation unit (27a) for generating a first signal corresponding to utterance data read from the memory device, and a device for controlling the first signal. a voltage level first volume variable (26a); a second utterance voltage waveform signal generator having a second utterance output generator for generating a second signal corresponding to the utterance data read from the memory device (27b), and a second volume changer (26b) that controls the voltage level of said second signal; a mixing circuit (24) that mixes said first and second signals; and an amplifier (25) A current corresponding to the voltage of the mixed signal flows to the sound emitting body (3) to emit a vehicle approach notification sound.

Description

[0001] Cross-reference of related applications [0002] This indication is based on the Japanese application number 2011-275998 for which it applied on December 16, 2011, and uses the description content here. technical field [0003] The present disclosure relates to a vehicle approach notification device that notifies surroundings that a vehicle is approaching by generating sound from the vehicle. Background technique [0004] In recent years, in electric vehicles (EV vehicles), hybrid vehicles (HV vehicles), etc., since the structure generates little noise and it is difficult for pedestrians to notice the approach of these vehicles, it is equipped with a A vehicle approach notification device that generates an approach notification sound based on the recognition that the vehicle is nearby (for example, refer to Patent Document 1). In this vehicle approach reporting device, as a sounding method, sounding data such as PCM (Pulse Code Modulation) stored in a memory of a mic...

AI Technical Summary

Problems solved by technology

[0006] However, since the utterance data is expressed in a form with "fluctuation" added, the amount of time necessary to store the utterance data, that is, the length of time of the utterance data increases, resulting in an increase in storage capacity.

In addition, due to the time limit of the storage capacity of the microcomputer, there is a problem that it is not possible to sufficiently add the "fluctuation" of the sound such as the "emphasis and inflection of the head" that is intended to be uttered.

[0007] In addition, even if "fluctuation" is added to the sound data, there is a problem that the way pedestrians hear the approaching sound will change depending on the installation location and sound insulation characteristics of the vehicle approaching sounding device in the vehicle.

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