Multi-mode pedestrian safety sound warning system for electric vehicle

Abstract

The invention relates to a multi-mode pedestrian safety sound warning system for an electric vehicle and belongs to the technical field of automobile safety. The system comprises a pedestrian detection module, a vehicle condition detection module, an environmental noise detection module, a waveform storage module, a central processor and a sound output module, wherein the pedestrian detection module is used for detecting whether pedestrians appear right ahead the vehicle; the vehicle condition detection module is used for acquiring the operating working condition of the electric vehicle; the environmental noise detection module is used for acquiring an environmental noise signal; the waveform storage module is used for storing waveforms corresponding to each module; the central processor is used for selecting corresponding sound waveform signals after judging the acquired signals; and the sound output module is used for selecting sound to play. The sound warning system disclosed by the invention is used for automatically controlling the output warning sound according to the environmental noise so as to reduce unnecessary environmental noise; and the used sound waveforms are subjected to filtering processing, so that the interference of the sound signals on the surrounding environment is furthest weakened and the driving cheerfulness is also ensured.

Description

technical field [0001] The invention relates to a multi-mode pedestrian safety sound warning system for an electric vehicle, in particular to a practical warning system that can play multiple modes of sound to warn pedestrians when a pure electric vehicle or a hybrid vehicle is in pure electric mode, and belongs to the automobile industry. field of security technology. Background technique [0002] At present, many automobile factories in my country have produced pure electric vehicles and hybrid vehicles. The noise of these electric vehicles is very small when driving at low speeds. Laxity is not conducive to the driver's correct judgment of the driving state of the car, the feeling of normal driving is lost, and the driving comfort of the vehicle is reduced. This noise characteristic of electric vehicles may cause traffic accidents. Thereby it is necessary to add a warning sound on the electric vehicle to ensure the safety of drivers and pedestrians. [0003] At present,...

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Problems solved by technology

[0003] At present, there are related technical patents related to the warning sound of electric vehicles in China. For example, Shi Xin of Foton Motor Co., Ltd. applied for the sound warning system, method and vehicle of pure electric mode hybrid electric vehicles. The patent application number is 200910147446.6. This patent discloses A sound warning system for hybrid electric vehicles, but the system still has the following disadvantages: 1. It does not consider that pure electric vehicles also need warning sounds at low speeds; 2. It does not consider that environmental noise has a great impact on the effect of warning sounds; 3. . The warning sound does not reflect the vehicle's speed and acceleration and other working condition information; 4. The pedestrian detection module is not included, and pedestrians cannot be reminded in time

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