Horn for environment protection digifax pulsewidth modulation vehicle

Abstract

The environment friendly digital and analog pulse width modulation (PWM) vehicle horn is one electronic horn as one vehicle part. The electronic horn includes two vibrators, PWM modulator, PWM driving stage, class-D amplifier and loudspeaker connected successively. It has two vibrators and thus can generate two tones, so that it may be used to replace available two vehicle horns for lowered making cost. It has digital and analog pulse width modulation technology adopted, so that it has high electric-to-sound conversion efficiency, relatively lower sound pressure level, and less noise interference and environmental pollution. In addition, it has also the advantages of stable performance, no need of regulation and compact structure, and may be used in automatic, motorcycle, electrically driven vehicle, ship, etc.

Description

technical field [0001] The invention relates to a vehicle electronic horn among vehicle parts. Background technique [0002] Car horns are necessary components for safe driving of vehicles. There are generally two types of car horns: contact electric horns and non-contact electronic horns. The existing contact-type electric horn adopting a relay contact structure has disadvantages such as low electro-acoustic conversion efficiency, short service life, high relative sound pressure level, and serious interference environment. Although the existing non-contact electronic horn has overcome some disadvantages of the contact type electric horn, it still has the disadvantages of complex circuit structure, poor reliability, high cost and difficulty in commercialization. And above-mentioned existing two types of car horns all can not produce 2 groups of audio frequencies, to make car horns send two groups of audio frequencies, must install two loudspeakers, as the patent No. is 9625...

AI Technical Summary

Problems solved by technology

The existing contact-type electric horn with a relay contact structure has disadvantages such as low electro-acoustic conversion efficiency, short service life, high relative sound pressure level, and serious interference environment.

Although the existing non-contact electronic horn has overcome some disadvantages of the contact type electric horn, it still has the disadvantages of complex circuit structure, poor reliability, high cost and difficulty in commercialization

And above-mentioned existing two types of car horns all can not produce 2 groups of audio frequencies, to make the car horns send two groups of audio frequencies, must install two loudspeakers, as the patent No. is 96250803.9 "automotive electronic horn", the patent No. is 03224163.1 "environmental protection Type car electronically controlled horns", when they are installed in the car, two horns must be installed in order to send out two sets of audio

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