A car electric horn pwm control device

Abstract

The invention provides a pulse width modulation (PWM) control device for an automotive electric whistle. The PWM control device for the automotive electric whistle comprises a single-chip microcomputer microcontroller unit (MCU), a switching power amplifier, a horn SP, an electric whistle relay driving circuit, a vehicle speed sensor, a pyroelectric sensor, an electric whistle button SB, a selective switch S1, a state indicating circuit and another selective switch S1. The PWM control device for the automotive electric whistle is scientific and reasonable in design and safe and reliable in work; on the premise that using safety is guaranteed, energy consumption is reduced, and secondary disasters caused by noise are reduced; the probability of the existing common road rage phenomenon can also be lowered, and the effect of constructing a harmonious society is achieved to a certain extent; and by the adoption of the control device, the sound volume and tone of the automotive electric whistle can be adjusted and controlled automatically according to the automobile speed and the traveling environment, so that the using function of an automobile is enhanced, and the good health and the harmonious environment are guaranteed.

Description

Technical field [0001] The present invention relates to the technical field of automobile electric whistle, in particular to a PWM control device for automobile electric whistle. The device can judge the influence of noise on the electric whistle by the surrounding environment and the speed of the vehicle, and then confirm the best electric whistle volume. With the ability to adjust the volume and tone at the same time, this device has a simple structure and a scientific design, which not only reduces the waste of electric energy, but also greatly improves the noise secondary disasters brought to the city due to the increasing number of vehicles and congestion, and improves the ecology The environment protects people's health. Background technique [0002] At present, all cars on the market are equipped with whistle horns, and some mid-to-high-end cars are also equipped with anti-theft horns. During the driving of the car, the driver triggers the whistle horn as needed to warn pe...

AI Technical Summary

Problems solved by technology

[0003] At present, the working methods of car electric horns on the market include traditional relay-controlled pronunciation methods, and electronic circuit control. If the vehicle speed and condition are adjusted to adjust the volume, when driving at low speed in the urban area, the car horn will generate high noise and cause noise pollution, which will easily cause pedestrians to frighten and damage the body organs, and this kind of car electric whistle will also cause waste of electric energy and occupy funds. pin;

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