Advanced acoustic pressure level stabilizing control method of electric horn

Abstract

The invention relates to a control method of an electric horn, in particular to an advanced acoustic pressure level stabilizing control method of an electric horn. The method comprises the following steps: firstly, the vibration strength of the vibration membrane of the electric horn is detected by a detecting device; the output signal value of the detecting device is compared with the set outputsignal value by utilizing a singlechip; the duty ratio of the driving signals of the electric horn is enlarged if the actual vibration strength of the vibration membrane of the electric horn is less than the set vibration strength, and otherwise, the duty ratio of the driving signals of the electric horn is reduced; the adjusting course is repeated until the deviation between the output signal value of the detecting device and the set output signal value is less than or equal to the set deviation value; the currently determined duty ratio value is taken as the duty ratio value of the current driving signals of the electric horn; and the driving signals of the electric horn is square wave signals. The invention provides the advanced acoustic pressure level stabilizing control method of theelectric horn capable of automatically stabilizing the acoustic pressure level and an intelligent control method of the electric horn capable of automatically adjusting the driving frequency in real time, automatically stabilizing the acoustic pressure level and with the functions of environment protection and sound production.

Description

technical field [0001] The invention relates to a horn control method, in particular to an electric horn [0002] Advanced steady sound pressure level control method. Background technique [0003] At present, the driving frequency of electric horns of motor vehicles is fixed before leaving the factory, and the natural frequency of electric horns will change due to changes in environmental conditions during use (for example: changes in temperature between winter and summer, air pressure between plains and plateaus) Changes, etc.) and changes in the mechanical properties of the electric horn can cause its change. Since the resonant peak of the electric horn diaphragm is very sharp, if the driving frequency cannot be adjusted in time, it may cause a sharp drop in the sound pressure level of the electric horn , or even be scrapped, which will affect the prompting effect and increase the energy consumption. For example: Patent No. 98807769.8 The method and device for frequency ...

AI Technical Summary

Problems solved by technology

Patent No. 97219874.1 The motor vehicle non-contact electric horn stabilizes the sound pressure level by adjusting the input signal strength of the power amplifier, so that the power amplifier will be in the amplified state, and the power amplifier tube will generate heat, which is easy to burn and has poor practicability

[0005] Electric horn is a necessary safety signal device on motor vehicles. With the rapid increase of the number of motor vehicles, the sound of electric horns has become one of the main sources of traffic noise. In order to reduce this noise, major and medium cities across the country , especially the bustling roads have implemented banning, although this can reduce noise, but it has brought a lot of inconvenience to drivers and pedestrians, and traffic accidents occur from time to time

At present, special devices are usually used to change the sound pressure level of electric horns. For example, the sound pressure level adjustment device for low-noise motor vehicle electric horns with patent No. 85204415 adjusts the sound pressure level by adjusting the size of the resonance cavity with screws. The adjustment process is complicated. Inconvenient to use