Control device for headlamp motor and headlamp motor

Abstract

The utility model belongs to the technical field of motor control, and particularly relates to a control device for a headlamp motor and the headlamp motor, the control device for the headlamp motor comprises a microprocessor, an input unit, a reference voltage providing unit, a filtering unit and an output unit; the microprocessor converts input signals into PWM signals with different duty ratios under reference voltage and outputs the PWM signals to the filtering unit, and the PWM signals are filtered and amplified by the filtering unit and the output unit and then output to a headlamp motor. According to the utility model, through the input unit and the microprocessor, input signals are collected, reference voltage is provided for the microprocessor through the reference voltage, and the microprocessor can convert the input signals into PWM signals with different duty ratios under the reference voltage and output the PWM signals to the filtering unit. And a high-precision angle adjusting voltage signal is obtained through the output unit and is output to the headlamp motor, so that the light angle adjusting precision can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor control, and in particular relates to a control device for a headlamp motor and the headlamp motor. Background Art

[0002] The existing headlamp motor control method directly converts the input voltage into a dimming voltage signal, that is, the voltage ratio is converted into a PWM signal to control the switch tube.

[0003] However, when the input voltage is disturbed or fluctuates widely, the error of the converted dimming voltage signal will be large, affecting the rotation angle of the headlamp motor and thus the angle of light adjustment.

[0004] Therefore, it is urgent to develop a new headlamp motor control device and a headlamp motor to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a control device for a headlamp motor and a headlamp motor.

[0006] In order to solve the above technical problems, the present utility model provides a control device for a headlamp motor, which includes: a microprocessor, an input unit, a reference voltage providing unit, a filtering unit and an output unit; wherein the input unit and the reference voltage providing unit are respectively connected to the microprocessor, and the microprocessor, the filtering unit and the output unit are connected in sequence; the input unit is suitable for transmitting an input signal to the microprocessor, and the reference voltage providing unit is suitable for providing a reference voltage to the microprocessor, so that the microprocessor converts the input signal into a PWM signal with different duty cycles under the reference voltage and outputs it to the filtering unit, and after being filtered and amplified by the filtering unit and the output unit, it is output to the headlamp motor.

[0007] Specifically, the input unit includes: an input voltage acquisition circuit; an input end of the input voltage acquisition circuit is connected to a voltage sampling end, and an output end of the input voltage acquisition circuit is connected to a microprocessor.

[0008] Specifically, the voltage sampling terminal provides a 6-16V voltage signal.

[0009] Specifically, the reference voltage providing unit includes: a voltage stabilizing circuit; an input end of the voltage stabilizing circuit is connected to a voltage sampling end, and an output end of the voltage stabilizing circuit is connected to a microprocessor.

[0010] Specifically, a voltage stabilizer is provided in the voltage stabilization circuit.

[0011] Specifically, the voltage regulator is suitable for providing a reference voltage of 5V to the microprocessor.

[0012] Specifically, the filtering unit includes: a low-pass filtering circuit; an input end of the low-pass filtering circuit is connected to the microprocessor, and an output end of the low-pass filtering circuit is connected to the output unit.

[0013] Specifically, the output unit includes: an operational amplifier; an input end of the operational amplifier is connected to the filtering unit, and an output end of the operational amplifier is connected to the headlamp motor.

[0014] Specifically, the operational amplifier outputs a PWM signal within the range of 0-20V.

[0015] On the other hand, the present invention provides a headlamp motor, which includes: the control device for the headlamp motor as described above.

[0016] The beneficial effect of the present invention is that the present invention collects input signals through the input unit and the microprocessor, and provides a reference voltage to the microprocessor by the reference voltage. The microprocessor can convert the input signal into a PWM signal with different duty cycles under the reference voltage and output it to the filtering unit, and then obtain a high-precision angle adjustment voltage signal through the output unit and output it to the headlamp motor, which can improve the accuracy of light angle adjustment.

[0017] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present invention.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 The utility model is a circuit diagram of a control device for a headlamp motor. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0022] Example 1, in this embodiment, as Figure 1 As shown, this embodiment provides a control device for a headlamp motor, which includes: a microprocessor, an input unit, a reference voltage providing unit, a filtering unit and an output unit; wherein the input unit and the reference voltage providing unit are respectively connected to the microprocessor, and the microprocessor, filtering unit and output unit are connected in sequence; the input unit is suitable for transmitting an input signal to the microprocessor, and the reference voltage providing unit is suitable for providing a reference voltage to the microprocessor, so that the microprocessor converts the input signal into a PWM signal with different duty cycles under the reference voltage and outputs it to the filtering unit, and then outputs it to the headlamp motor after filtering and amplification by the filtering unit and the output unit.

[0023] In this embodiment, the input signal is collected through the input unit and the microprocessor, and the reference voltage is provided to the microprocessor by the reference voltage. The microprocessor can convert the input signal into a PWM signal with different duty cycles under the reference voltage and output it to the filtering unit, and then obtain a high-precision angle adjustment voltage signal through the output unit and output it to the headlamp motor, which can improve the accuracy of the light angle adjustment.

[0024] In this embodiment, the input unit includes: an input voltage acquisition circuit; an input end of the input voltage acquisition circuit is connected to a voltage sampling end, and an output end of the input voltage acquisition circuit is connected to a microprocessor.

[0025] Specifically, the input voltage is collected by the input voltage collection circuit and then sent to the microprocessor for processing, which can effectively filter out interference signals in the input voltage and adjust the duty cycle of the output PWM signal at any time according to the voltage change.

[0026] In this embodiment, the voltage sampling terminal provides a 6-16V voltage signal.

[0027] In this embodiment, the reference voltage providing unit includes: a voltage stabilizing circuit; an input end of the voltage stabilizing circuit is connected to a voltage sampling end, and an output end of the voltage stabilizing circuit is connected to a microprocessor.

[0028] In this embodiment, a voltage stabilizer is provided in the voltage stabilization circuit.

[0029] Specifically, the input voltage in the range of 6-16V is stabilized by the voltage regulator to obtain a reference voltage of 5V. The microprocessor collects the input voltage, processes it through algorithms such as filtering, and outputs a 20KHz signal with a duty cycle adjusted according to the required voltage ratio. The PWM signal passes through the filtering unit to obtain a 0-5V DC voltage signal, and then passes through the output unit to obtain an angle adjustment voltage signal in the range of 0-20V.

[0030] In this embodiment, the voltage regulator is suitable for providing a reference voltage of 5V to the microprocessor.

[0031] In this embodiment, the filtering unit includes: a low-pass filtering circuit; an input end of the low-pass filtering circuit is connected to the microprocessor, and an output end of the low-pass filtering circuit is connected to the output unit.

[0032] In this embodiment, the output unit includes: an operational amplifier; an input end of the operational amplifier is connected to the filter unit, and an output end of the operational amplifier is connected to the headlamp motor.

[0033] In this embodiment, the operational amplifier outputs a PWM signal within the range of 0-20V.

[0034] Specifically, the 0-5V DC voltage obtained after modulation is amplified to the range of 0-20V by an operational amplifier, meeting the 6-16V operating voltage range requirement of the vehicle lamp.

[0035] Example 2: Based on Example 1, this example provides a headlamp motor, which includes: a control device for the headlamp motor as provided in Example 1.

[0036] To sum up, the present invention collects input signals through the input unit and the microprocessor, and provides the reference voltage to the microprocessor. The microprocessor can convert the input signal into a PWM signal with different duty cycles under the reference voltage and output it to the filtering unit. Then, the output unit obtains a high-precision angle adjustment voltage signal and outputs it to the headlamp motor, which can improve the accuracy of light angle adjustment.

[0037] All components used in this application (without specific structural descriptions) are standard components or components known to those skilled in the art. Their structures and principles are readily known to those skilled in the art through technical manuals or routine experimental methods. Furthermore, the software programs involved in this application are all prior art, and this application does not involve any improvements to the software programs.

[0038] In the description of the embodiments of the present invention, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interface, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0041] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0042] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0043] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A control device for a headlamp motor, characterized in that: include: A microprocessor, an input unit, a reference voltage providing unit, a filtering unit and an output unit; in The input unit and the reference voltage providing unit are respectively connected to the microprocessor, and the microprocessor, the filtering unit and the output unit are connected in sequence; The input unit is suitable for transmitting the input signal to the microprocessor, and the reference voltage providing unit is suitable for providing the reference voltage to the microprocessor, so that the microprocessor converts the input signal into a PWM signal with different duty cycles under the reference voltage and outputs it to the filtering unit, and then outputs it to the headlamp motor after filtering and amplification by the filtering unit and the output unit.

2. The headlamp motor control device according to claim 1, wherein: The input unit includes: an input voltage acquisition circuit; The input end of the input voltage acquisition circuit is connected to the voltage sampling end, and the output end of the input voltage acquisition circuit is connected to the microprocessor.

3. The headlamp motor control device according to claim 2, wherein: The voltage sampling terminal provides a 6-16V voltage signal.

4. The headlamp motor control device according to claim 1, wherein: The reference voltage providing unit includes: a voltage stabilizing circuit; The input end of the voltage stabilizing circuit is connected to the voltage sampling end, and the output end of the voltage stabilizing circuit is connected to the microprocessor.

5. The headlamp motor control device according to claim 4, wherein: A voltage stabilizer is provided in the voltage stabilizing circuit.

6. The headlamp motor control device according to claim 5, wherein: The voltage regulator is suitable for providing a reference voltage of 5V to the microprocessor.

7. The headlamp motor control device according to claim 1, wherein: The filtering unit includes: a low-pass filtering circuit; The input end of the low-pass filter circuit is connected to the microprocessor, and the output end of the low-pass filter circuit is connected to the output unit.

8. The headlamp motor control device according to claim 7, wherein: The output unit includes: an operational amplifier; The input end of the operational amplifier is connected to the filter unit, and the output end of the operational amplifier is connected to the headlamp motor.

9. The headlamp motor control device according to claim 8, wherein: The operational amplifier outputs a PWM signal within the range of 0-20V.

10. A headlamp motor, characterized in that: include: A headlamp motor control device according to any one of claims 1 to 9.

Images