An automobile electronic horn control device

Abstract

This utility model discloses an automotive electronic horn control device. A square wave generation module generates a square wave of a specific frequency, providing a precise signal reference for the control device. The MOSFET drive module precisely controls the on and off times of the MOSFET based on this square wave, thereby accurately adjusting the magnetic force and frequency of the electromagnet drive module. Since the vibration frequency of the diaphragm in the sound output module is closely related to the frequency of the electromagnet's magnetic force change, the horn's sound frequency can be output strictly according to the set parameters, achieving precise sound control. Simultaneously, the square wave signal can be quickly transmitted to the MOSFET drive module. As a high-speed switching device, the MOSFET transmits the signal to the electromagnet drive module with almost no delay. The electromagnet also quickly generates a change in magnetic force to drive the diaphragm to produce sound. The entire process involves fast signal transmission and timely module response, significantly shortening the time from control signal input to horn sound emission, improving horn response speed, and ensuring timely warning signals in emergency situations.

Description

Technical Field

[0001] This utility model relates to the field of automotive control technology, and in particular to an automotive electronic horn control device. Background Technology

[0002] With the rapid development of automotive electronics technology, higher requirements have been placed on the control of car horns. For example, more precise sound frequency control is needed to meet the warning needs of different car models and driving scenarios. At the same time, the response speed of the horn needs to be improved to ensure that warning signals can be issued in a timely manner in emergency situations.

[0003] However, traditional car horn control methods mostly use mechanical or simple electronic control circuits, which have many limitations in terms of sound control accuracy and response speed. Utility Model Content

[0004] In view of this, the present invention proposes an electronic horn control device for automobiles, which can effectively solve the many limitations of the existing technology in terms of sound control accuracy and response speed.

[0005] The technical solution of this utility model is implemented as follows:

[0006] An electronic horn control device for automobiles includes:

[0007] Square wave generation module, used to generate square waves of a certain frequency;

[0008] The MOSFET driver module is used to control the conduction and cutoff of the MOSFET based on the square wave signal generated by the square wave generation module, thereby driving the electromagnet driver module.

[0009] The electromagnet drive module is used to generate magnetic force under the drive of the MOSFET drive module to drive the sound output module;

[0010] The sound output module is used to generate sound waves by vibrating the diaphragm and causing the air to vibrate.

[0011] As a further optional embodiment of the automotive electronic horn control device, the control device further includes:

[0012] The protection and voltage regulation module is used to implement reverse connection protection of the power supply and prevent the electromagnet coil voltage from being too high, and to provide a stable operating voltage for the square wave generation circuit.

[0013] As a further optional embodiment of the automotive electronic horn control device, the device further includes:

[0014] The sound enhancement module is used to enhance the resonance effect of the sound waves generated by the sound output module through the resonant disk.

[0015] As a further alternative to the aforementioned automotive electronic horn control device, the square wave generation module employs an HD555 chip and its peripheral circuitry.

[0016] As a further optional solution to the aforementioned automotive electronic horn control device, the protection and voltage stabilization module includes:

[0017] The protection circuit is used to implement reverse connection protection of the power supply and prevent the electromagnet coil voltage from being too high.

[0018] A voltage regulator and filter circuit is used to provide a stable operating voltage for the square wave generation circuit.

[0019] The beneficial effects of this invention are as follows: The square wave generation module can generate square waves of a specific frequency, providing a precise signal reference for the entire control device. The MOSFET drive module precisely controls the on and off times of the MOSFET based on this square wave signal, thereby accurately adjusting the magnitude and frequency of the magnetic force generated by the electromagnet drive module. The vibration frequency of the diaphragm in the sound output module is closely related to the frequency of the electromagnet's magnetic force change, ultimately ensuring that the sound frequency emitted by the speaker is output strictly according to the frequency set by the square wave generation module, achieving precise sound control. Simultaneously, the square wave signal generated by the square wave generation module can be quickly transmitted to the MOSFET drive module. As a high-speed switching device, the MOSFET can quickly turn on or off upon receiving the square wave signal, transmitting the electrical signal to the electromagnet drive module with almost no delay. Upon receiving the drive signal, the electromagnet can also quickly generate a corresponding change in magnetic force, driving the diaphragm to vibrate and produce sound. The entire process involves rapid signal transmission and timely response from each module, greatly shortening the time from control signal input to speaker sound emission, improving the speaker's response speed, and ensuring timely warning signals in emergency situations. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a circuit diagram of an electronic horn control device for automobiles according to the present invention. Detailed Implementation

[0022] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] refer to Figure 1 An automotive electronic horn control device includes a square wave generation module, a MOSFET driving module, an electromagnet driving module, a sound output module, a sound enhancement module, and a protection and voltage regulation module, wherein:

[0024] A square wave generation module is used to generate a square wave of a certain frequency. In some embodiments, the square wave generation module uses an HD555 chip and its peripheral circuits.

[0025] Specifically, the HD555 chip can generate a precise square wave signal according to preset parameters with minimal frequency error. In automotive electronic horn control, this stable square wave signal serves as a control reference, ensuring that the subsequent MOS transistor drive module, electromagnet drive module, and sound output module operate in a consistent and stable manner. This results in accurate and stable sound frequency emitted by the horn, avoiding sound distortion or instability caused by signal frequency fluctuations.

[0026] By adjusting the parameters of components such as resistors and capacitors in the peripheral circuit of the HD555 chip, the frequency and duty cycle of the square wave can be easily changed. This feature allows car electronic horns to flexibly adjust the frequency and characteristics of the sound according to different needs, such as different car models, driving scenarios, or warning requirements. For example, in scenarios requiring more urgent warnings, the square wave frequency can be quickly adjusted to emit a higher frequency sound. The HD555 chip can achieve multiple operating modes, such as monostable and astable, and different operating modes can generate different types of square wave signals, providing car electronic horns with more control options. For example, under certain special functional requirements, different operating modes can be used to achieve effects such as intermittent sound emission and gradual increase / decrease in volume, enriching the horn's functionality. It should be noted that adjusting the resistance parameters of resistors R1, R3, and RX can allow the HD555 chip to output a fixed frequency of 416±5Hz or 496±5Hz.

[0027] The MOSFET driver module is used to control the conduction and cutoff of MOSFET Q1 based on the square wave signal generated by the square wave generation module, thereby driving the electromagnet driver module.

[0028] Specifically, the MOSFET has fast switching characteristics, enabling it to precisely turn on and off according to a square wave signal. This allows the electromagnet drive module to accurately control the current flow according to the rhythm of the square wave, thereby generating precise magnetic force changes corresponding to the square wave frequency. For example, when a specific frequency sound alarm is required, it can ensure that the electromagnet's magnetic force changes are consistent with the preset value, providing a stable driving foundation for the sound output module and achieving precise control of the sound frequency. By rationally designing the MOSFET drive circuit, the current flowing through the MOSFET Q1 can be finely adjusted. According to different speaker operating requirements, such as different volume levels or sound characteristic requirements, the current intensity supplied to the electromagnet can be accurately controlled, thereby adjusting the amplitude and force of the diaphragm vibration and achieving fine control of sound intensity and sound quality.

[0029] MOSFETs have extremely fast switching speeds, enabling them to quickly turn on or off the signal upon receiving a square wave signal. This significantly shortens the time interval between the generation of the square wave signal and the start of electromagnet action, allowing the horn to respond quickly to control commands and issue warning sounds promptly, thus improving the safety warning efficiency of the vehicle in emergency situations. Due to the fast response characteristics of MOSFETs, the signal delay time during the driving process is reduced, ensuring that the square wave signal can be transmitted to the electromagnet drive module in a timely and accurate manner, avoiding problems such as delayed or inaccurate sound output caused by signal delay.

[0030] The electromagnet drive module is used to generate magnetic force under the drive of the electromagnet coil L1 of the MOSFET drive module, thereby driving the sound output module.

[0031] Specifically, since the MOSFET drive module can precisely control the on / off state and magnitude of the current in the electromagnet coil L1, the electromagnet drive module can generate magnetic force with corresponding intensity and frequency. This precise magnetic force adjustment makes the driving of the diaphragm in the sound output module more accurate, and can generate stable sound vibration according to the preset square wave frequency and requirements, thereby achieving accurate control of sound frequency and intensity.

[0032] The stable magnetic force generated by the electromagnet provides a continuous and uniform driving force to the diaphragm, making the diaphragm vibrate more regularly. This, in turn, drives the air to vibrate and generate stable sound waves. This helps improve the quality of the sound emitted by the horn, reduces sound distortion and noise, and makes the warning sound clearer and louder. By changing the current parameters of the electromagnet coil, such as the magnitude and direction of the current, the strength and direction of the magnetic force can be adjusted, thereby achieving flexible control over the amplitude and mode of diaphragm vibration. This allows the car electronic horn to emit sounds of different intensities and characteristics according to different needs, such as different warning levels or scenarios.

[0033] The sound output module is used to generate sound waves by vibrating the diaphragm and causing the air to vibrate.

[0034] Specifically, the diaphragm vibrates under the magnetic force generated by the electromagnet drive module. This vibration directly drives the surrounding air to vibrate and generate sound waves. A well-designed diaphragm material and structure can ensure the stability and regularity of the vibration, thereby producing a clear and loud sound. This allows the warning signal of the car horn to be accurately received, improving the effectiveness of driving safety warnings. By selecting appropriate diaphragm materials and shapes, the timbre of the sound can be optimized to a certain extent. For example, diaphragms made of certain special materials can make the sound softer or sharper to adapt to different warning needs and scenarios, improving the sound's recognizability and auditory effect.

[0035] The sound enhancement module is used to enhance the resonance effect of the sound waves generated by the sound output module through the resonant disk.

[0036] Specifically, the resonance plate can resonate with the sound waves generated by the sound output module, converging and amplifying the energy of the sound waves. By rationally designing the shape, size, and material of the resonance plate, its resonance frequency can be matched with the horn's sound frequency, thereby effectively increasing the sound intensity and making the warning sound emitted by the car horn travel farther and louder, improving the warning effect in complex environments. The enhanced resonance effect not only increases the volume of the sound but also enhances its penetrating power. In urban traffic noise or when encountering obstacles, the sound amplified by the resonance plate can better penetrate interference, allowing surrounding people and vehicles to receive the warning signal more clearly, ensuring driving safety.

[0037] A protection and voltage regulation module is used to implement reverse connection protection of the power supply and prevent excessive voltage in the electromagnet coil, and to provide a stable operating voltage for the square wave generation circuit. In some embodiments, the protection and voltage regulation module includes:

[0038] The protection circuit is used to realize reverse connection protection of the power supply and prevent the electromagnet coil voltage from being too high. Among them, diode D4 is used for reverse connection protection of the power supply, and varistor YM is used to protect MOSFET Q1 and prevent the electromagnet coil voltage from being too high.

[0039] The voltage regulator and filter circuit is used to provide a stable operating voltage for the square wave generation circuit. The resistor R6 and diode D2 form a voltage regulator circuit to generate a constant voltage for the HD555 chip, and the capacitor C4 is used for voltage regulation and filtering.

[0040] Specifically, diode D4 has unidirectional conductivity. When the positive and negative terminals of the power supply are reversed, diode D4 is in the cut-off state, preventing the current from flowing in the opposite direction. This effectively avoids damage to subsequent circuit components caused by reverse power supply, improves the reliability and stability of the entire control device, and reduces the cost of repairing faults caused by misoperation.

[0041] The varistor YM is sensitive to voltage changes. When the voltage of the electromagnet coil is too high, the resistance of the varistor YM will decrease rapidly, diverting the excessive voltage and protecting the MOSFET Q1 from the impact of excessive voltage. This ensures that the MOSFET Q1 operates within a safe voltage range, extends its service life, and ensures the normal operation of the electromagnet drive module.

[0042] The voltage regulator circuit composed of resistor R6 and diode D2 can generate a constant voltage for the HD555 chip. A stable voltage input is crucial for the HD555 chip to accurately generate square wave signals, ensuring the stability of the frequency and duty cycle of the square wave signals, thereby making the working rhythm of the entire control device more precise and the sound output more stable.

[0043] Capacitor C4 serves as an energy storage and filter, smoothing voltage fluctuations and filtering out high-frequency noise and interference signals in the power supply. It provides a clean and stable power supply for the square wave generation circuit, which helps reduce distortion and noise in the square wave signal, improves the quality of sound output, and makes the warning sound emitted by the speaker clearer and purer.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A car electronic horn control device, characterized in that, include: Square wave generation module, used to generate square waves of a certain frequency; The MOSFET driver module is used to control the conduction and cutoff of the MOSFET based on the square wave signal generated by the square wave generation module, thereby driving the electromagnet driver module. The electromagnet drive module is used to generate magnetic force under the drive of the MOSFET drive module to drive the sound output module; The sound output module is used to generate sound waves by causing the air to vibrate due to the vibration of the diaphragm.

2. The automotive electronic horn control device according to claim 1, characterized in that, The control device further includes: The protection and voltage regulation module is used to implement reverse connection protection of the power supply and prevent the electromagnet coil voltage from being too high, and to provide a stable operating voltage for the square wave generation circuit.

3. The automotive electronic horn control device according to claim 2, characterized in that, The manufacturing device further includes: The sound enhancement module is used to enhance the resonance effect of the sound waves generated by the sound output module through the resonant disk.

4. The automotive electronic horn control device according to claim 3, characterized in that, The square wave generation module uses the HD555 chip and its peripheral circuitry.

5. The automotive electronic horn control device according to claim 4, characterized in that, The protection and voltage regulation module includes: The protection circuit is used to implement reverse connection protection of the power supply and prevent the electromagnet coil voltage from being too high. A voltage regulator and filter circuit is used to provide a stable operating voltage for the square wave generation circuit.

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