Klaxon primary sound pressure level stabilization control method

An electric horn, sound pressure level technology, applied in the direction of sounding equipment, sound signal devices, instruments, etc., can solve the problems of inconvenience for drivers and pedestrians, poor practicability, inconvenient use, etc., to achieve high sound production efficiency, strong real-time performance, and economical Effects of Electric Resonance State

Inactive Publication Date: 2011-01-05
曹志才
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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
[0004] 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 acr

Method used

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Examples

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Example Embodiment

[0034] A primary sound pressure level control method for electric horns. First, the power supply voltage is detected by the analog-to-digital conversion function of the single-chip microcomputer. Then, the single-chip microcomputer determines the current power according to the corresponding relationship between the detected value of the power supply voltage and the duty cycle of the electric horn drive signal. The duty cycle of the horn driving signal, and the natural frequency value of the electric horn stored in the single-chip microcomputer or non-volatile data memory is used as the frequency of the current electric horn driving signal. Then, the single-chip microcomputer outputs the electric horn driving signal. After the power is amplified, the electric horn is driven to work, and the electric horn drive signal is a square wave signal.

[0035] The corresponding relationship between the power supply voltage detection value and the duty cycle of the electric horn driving signa...

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Abstract

The invention relates to a klaxon control method. A klaxon primary sound pressure level stabilization control method comprises that: firstly, a power supply voltage is detected by utilizing an analogue-to-digital conversion function of a singlechip; secondly, the singlechip determines the duty ratio of a current klaxon drive signal according to corresponding relationships between detected power supply voltage values and the duty ratios of klaxon drive signals, and adopts a natural frequency value of a klaxon stored in the singlechip or a nonvolatile data memory as the frequency of the current klaxon drive signal; and finally, the singlechip outputs the klaxon drive signal which is subjected to power amplification to drive the klaxon to work and is a square signal. The invention provides the klaxon primary sound pressure level stabilization control method through which a sound pressure level can be automatically stabilized, and a klaxon intelligent control method with the advantages of environmentally-friendly sound-production function and capability of automatically adjusting drive frequency in real time and automatically stabilizing the sound pressure level.

Description

technical field [0001] The invention relates to a horn control method, in particular to a control method for the primary stable sound pressure level of an electric horn. Background technique [0002] 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 frequenc...

Claims

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Application Information

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IPC IPC(8): B60Q5/00G10K9/12
Inventor 曹志才
Owner 曹志才
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