Vehicle-mounted headlamp height adjusting circuit, method and device

Abstract

The invention discloses a vehicle-mounted headlamp height adjusting circuit, method and device, and the circuit is provided with a filter circuit and a proportional amplification circuit, one end of a first resistor in the filter circuit is connected with a controller, the other end of the first resistor is connected with one end of a second resistor, the other end of the first resistor is connected with one end of a first capacitor, and the other end of the second resistor is connected with the other end of a second capacitor. The other end of the second resistor is connected with one end of the second capacitor; one end of a third resistor in the proportional amplification circuit is connected with one end of a second capacitor, the other end of the third resistor is connected with one end of a fourth resistor, and the other end of the third resistor is connected with the in-phase input end of an amplifier; the other end of the fifth resistor is connected with one end of the sixth resistor and is connected with the reverse input end of the amplifier, and the other end of the sixth resistor is connected with the output end of the amplifier. Through the circuit, an input headlamp height adjusting control signal can be divided more accurately, so that more voltage gears are obtained after amplification; the height of the vehicle lamp can be adjusted in a self-adaptive mode under different road conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile headlight control, and in particular to a circuit, method and device for adjusting the height of an automobile headlight. Background Art

[0002] At present, the headlight height adjustment switch on most models adopts a knob structure with a built-in potentiometer. By rotating the knob to change the resistance value and then divide the voltage to obtain different voltage values, the height of the car headlights can be adjusted. Or, by pressing a button, a transistor-mounted circuit can be used to obtain different voltage values ​​to adjust the height of the car headlights. However, the number of gears for headlight height adjustment in most models is fixed, that is, the adjustment degree is limited, and the headlight height adjustment under different road conditions cannot be achieved. In addition, the use of physical buttons or knobs has the problem of switch loss, which is prone to over-position failure, poor contact or button jamming due to physical wear. Summary of the invention

[0003] In order to solve the above technical problems, the embodiments of the present invention provide a circuit, method and device for adjusting the height of vehicle headlights, which can realize adaptive adjustment of the height of vehicle lights under different road conditions to ensure vehicle driving safety.

[0004] A first aspect of an embodiment of the present invention provides a vehicle headlight height adjustment circuit, the circuit comprising:

[0005] A filter circuit, the filter circuit comprising a first resistor, a second resistor, a first capacitor and a second capacitor,

[0006] Wherein, one end of the first resistor is connected to the controller, the other end of the first resistor is connected to one end of the second resistor, the other end of the first resistor is connected to one end of the first capacitor, and the other end of the second resistor is connected to one end of the second capacitor;

[0007] A proportional amplification circuit, the proportional amplification circuit includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and an amplifier,

[0008] One end of the third resistor is connected to one end of the second capacitor, the other end of the third resistor is connected to one end of the fourth resistor, and the other end of the third resistor is connected to the non-inverting input end of the amplifier;

[0009] The other end of the fifth resistor and one end of the sixth resistor are respectively connected to the inverting input terminal of the amplifier, the other end of the sixth resistor is connected to the output terminal of the amplifier, and one end of the fifth resistor is grounded.

[0010] In a possible implementation manner of the first aspect, the positive pole of the power supply of the amplifier is connected to the positive pole of the power supply, and the negative pole of the power supply of the amplifier is connected to the negative pole of the power supply.

[0011] In a possible implementation manner of the first aspect, an amplification gain of the amplifier is determined according to resistance values ​​of the third resistor and the fourth resistor.

[0012] In a possible implementation manner of the first aspect, the resistance value of the first resistor, the resistance value of the second resistor, the capacitance value of the first capacitor, and the capacitance value of the second capacitor are determined by a preset formula, wherein the preset formula is:

[0013] R1*C1=R2*C2

[0014] In the formula, R1 is the resistance value of the first resistor, R2 is the resistance value of the second resistor, C1 is the capacitance value of the first capacitor, and C2 is the capacitance value of the second capacitor.

[0015] In order to solve the same technical problem, a second aspect of an embodiment of the present invention provides a method for adjusting the height of a vehicle headlight, the method comprising:

[0016] Acquire light height position information, and output a control signal based on the light height position information;

[0017] The control signal is filtered by the regulating circuit to obtain a DC signal, the DC signal is amplified, and after obtaining the amplified DC signal, the amplified DC signal is sent to the vehicle light regulating controller so that the regulating controller adjusts the height of the vehicle light according to the amplified DC signal, wherein the regulating circuit is the above-mentioned vehicle headlight height regulating circuit.

[0018] In a possible implementation manner of the second aspect, obtaining light height position information includes:

[0019] Receiving the light height position information to be adjusted input by the vehicle user on the human-machine interaction device, and obtaining the light height position information;

[0020] Or obtain the inclination angle data between the vehicle and the horizontal plane, and use the inclination angle data to calculate the height position information of the light, wherein the horizontal plane refers to the plane perpendicular to the direction of gravity.

[0021] In a possible implementation manner of the second aspect, calculating and obtaining light height position information using the tilt angle data includes:

[0022] If the tilt angle data is a positive value, the light height position information is obtained based on the tilt angle data and the proportional coefficient, where the expression of the light height position information is:

[0023]

[0024] Where D is the light height position information, α is the tilt angle data, K is the proportional coefficient, and the proportional coefficient is a parameter that describes the quantitative relationship between the tilt angle data and the light height position information;

[0025] If the tilt angle data is a negative value, the absolute value of the tilt angle data and the proportional coefficient are used to obtain the light height position information, where the expression of the light height position information is:

[0026] D=|α|*K

[0027] Where D is the light height position information, α is the tilt angle data, K is the proportional coefficient, and the proportional coefficient is a parameter that describes the quantitative relationship between the tilt angle data and the light height position information.

[0028] In a possible implementation manner of the second aspect, filtering the control signal to obtain a DC signal includes:

[0029] The cut-off frequency is calculated according to the capacitance value of the first capacitor, the capacitance value of the second capacitor, the resistance value of the first resistor and the resistance value of the second resistor in the regulating circuit;

[0030] The high frequency components of the control signal are filtered according to the cut-off frequency to obtain a DC signal.

[0031] In order to solve the same technical problem, a third aspect of an embodiment of the present invention provides a vehicle headlight height adjustment device, the device comprising:

[0032] A control signal acquisition module, used to acquire light height position information and output a control signal based on the light height position information;

[0033] The regulating module is used to filter the control signal using the regulating circuit to obtain a DC signal, amplify the DC signal, and after obtaining the amplified DC signal, send the amplified DC signal to the headlight regulating controller so that the regulating controller adjusts the headlight height according to the amplified DC signal, wherein the regulating circuit is the vehicle headlight height adjustment regulating circuit proposed in the first aspect.

[0034] In a possible implementation manner of the third aspect, the control signal includes a first acquisition unit or a second acquisition unit,

[0035] The first acquisition unit is used to receive the light height position information to be adjusted input by the vehicle user on the human-computer interaction device, and obtain the light height position information;

[0036] The second acquisition unit is used to acquire the inclination angle data between the vehicle and the horizontal plane, and calculate the light height position information using the inclination angle data, wherein the horizontal plane refers to a plane perpendicular to the gravity direction.

[0037] The technical solution of the present invention has the following advantages:

[0038] The vehicle headlight height adjustment circuit provided in the embodiment of the present invention can divide the input headlight height adjustment control signal more accurately by setting a filtering circuit and a proportional amplifier circuit, so that the more voltage gears obtained after amplification, the higher the adjustment degree of the headlight. The vehicle headlight height adjustment circuit can be used in a vehicle headlight height adjustment device to realize adaptive adjustment of the headlight height under different road conditions and ensure the safety of vehicle driving.

[0039] The vehicle headlight height adjustment method provided in the embodiment of the present invention obtains light height position information, outputs a control signal based on the light height position information, and then uses an adjustment circuit to filter the control signal to obtain a DC signal, amplifies the DC signal, and after obtaining the amplified DC signal, sends the amplified DC signal to a headlight adjustment controller, so that the adjustment controller adjusts the headlight height according to the amplified DC signal. Any height adjustment can be achieved through this method, thereby realizing adaptive adjustment of the headlight height under different road conditions to ensure vehicle driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific implementation methods of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 Schematic diagram of the circuit structure of the adjustment circuit for adjusting the height of vehicle headlights in an embodiment of the present invention;

[0042] Figure 2 Flow chart of a vehicle headlight height adjustment method according to an embodiment of the present invention;

[0043] Figure 3 The following is a control circuit flow chart of a vehicle headlight height adjustment method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The vehicle headlight height adjustment circuit provided by the embodiment of the present invention is as follows: Figure 1 As shown, the vehicle headlight height adjustment circuit includes a filtering circuit and a proportional amplification circuit, wherein the filtering circuit includes a first resistor, a second resistor, a first capacitor and a second capacitor, one end of the first resistor is connected to the controller, the other end of the first resistor is connected to one end of the second resistor, the other end of the first resistor is connected to one end of the first capacitor, and the other end of the second resistor is connected to one end of the second capacitor;

[0048] The proportional amplification circuit includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and an amplifier, one end of the third resistor is connected to one end of the second capacitor, the other end of the third resistor is connected to one end of the fourth resistor, and the other end of the third resistor is connected to the in-phase input terminal of the amplifier; the other end of the fifth resistor and one end of the sixth resistor are connected to the inverting input terminal of the amplifier respectively, the other end of the sixth resistor is connected to the output terminal of the amplifier, and one end of the fifth resistor is grounded.

[0049] In this embodiment, the adjustment circuit receives an input PWM pulse signal. The input PWM pulse signal is filtered twice through resistor R1 and capacitor C1, resistor R2 and capacitor C2 to filter out the high-frequency AC and retain the DC part, and then the DC signal is amplified through a negative feedback network composed of amplifier U1 and resistors R3, R4, R5 and R6 to obtain the amplified signal, and then the amplified signal is input to the headlight height adjustment controller through the signal port.

[0050] Resistor R3 is connected to resistor R4 and the in-phase (+) input terminal of amplifier U1, and the inverting (-) input terminal of amplifier U1 is connected to resistor R5 and resistor R6, wherein the other end of resistor R6 is connected to the output terminal of amplifier U1, thereby forming a proportional amplifier circuit.

[0051] The vehicle headlight height adjustment circuit provided by the embodiment of the present invention can divide the input headlight height adjustment control signal more accurately by setting a filter circuit composed of resistors R1, R2, capacitors C1 and C2, and a proportional amplification circuit composed of resistors R3, R4, R5, R6 and an amplifier, so that the more voltage gears obtained after amplification, the higher the adjustment degree of the headlight. The vehicle headlight height adjustment circuit can be used in a vehicle headlight height adjustment device to realize adaptive adjustment of the headlight height under different road conditions to ensure vehicle driving safety.

[0052] In one embodiment, the positive pole of the power supply of the amplifier is connected to the positive pole of the power supply, and the negative pole of the power supply of the amplifier is connected to the ground.

[0053] In this embodiment, if Figure 1 As shown, the positive pole of the power supply of the amplifier U1 is connected to the positive pole of the power supply, and the negative pole of the power supply of the amplifier U1 is connected to the ground.

[0054] In one embodiment, the amplification gain of the amplifier is determined according to the resistance values ​​of the third resistor and the fourth resistor.

[0055] In this embodiment, the PWM pulse signal is filtered through a filter circuit to remove the high-frequency components in the signal, thereby retaining the DC signal. Then the DC signal is amplified by the above-mentioned proportional amplifier circuit to amplify the DC signal with a voltage range of only 0 to 5V into a DC signal adapted to the headlight height adjustment controller, for example, 0 to 12V. First, R3+R4=R5+R6 is preset, where R3=R5, R4=R6. According to the characteristics of "virtual short" and "virtual break" in the amplifier, it can be known that the amplification gain AV=R4 / R3, and the specific amplification gain can be determined by the actual selected values ​​of R3 and R4.

[0056] In one embodiment, the resistance value of the first resistor, the resistance value of the second resistor, the capacitance value of the first capacitor, and the capacitance value of the second capacitor are determined by a preset formula, wherein the preset formula is:

[0057] R1*C1=R2*C2

[0058] In the formula, R1 is the resistance value of the first resistor R1, R2 is the resistance value of the second resistor R2, C1 is the capacitance value of the first capacitor C1, and C2 is the capacitance value of the second capacitor C2.

[0059] In this embodiment, if Figure 1 As shown, in the secondary low-pass filter composed of resistor R1, capacitor C1, resistor R2 and capacitor C2, the resistance value and the capacitance value can be selected in the manner of R1*C1=R2*C2. Then, the cut-off frequency can be calculated according to the selected resistance value and capacitance value, and the high-frequency component in the received PWM pulse signal can be filtered out in combination with the cut-off frequency, thereby retaining the DC signal.

[0060] The vehicle headlight height adjustment method provided by the embodiment of the present invention is as follows: Figure 2 As shown, it is a flow chart of the vehicle headlight height adjustment method provided by an embodiment of the present invention, including steps S201 to S202, each step is specifically as follows:

[0061] S201: Acquire light height position information, and output a control signal based on the light height position information;

[0062] In this embodiment, the height of the headlight is at the lowest position in the initial state, and the light height position information can be obtained in two ways: one is to select the manual mode and set the position degree through the human-machine interaction device of the vehicle, such as setting the position of 5%. The vehicle controller MCU receives the height position information to be adjusted and outputs the corresponding PWM pulse signal to the adjustment circuit. The second is to select the automatic mode, the vehicle controller MCU obtains the inclination angle data of the level sensor installed in front of the vehicle, processes the inclination angle data to obtain the height position information to be adjusted, and then inputs the corresponding PWM pulse signal to the adjustment circuit according to the height position information to be adjusted. The adjustment circuit is responsible for converting the PWM pulse signal sent by the controller MCU into the voltage signal required by the headlight height adjustment controller, and then controls the headlight to reach the corresponding height through this voltage signal.

[0063] It should be noted that the control signal is a PWM pulse signal, which is a digital signal that can be used to control the speed of the device motor, thereby achieving rotation, forward, backward and speed adjustment in all directions of the controlled device.

[0064] As an example of an embodiment of the present invention, Figure 3 As shown, in the vehicle lighting control system, it includes a voltage stabilizer 1, a controller 2, an adjustment circuit 3, a headlight height adjustment controller 4 and a power supply 5. After the voltage stabilizer 1 receives power from the external power supply 5, it outputs power 1-1 to supply power to the headlight height adjustment circuit 3 and the headlight height adjustment controller, and outputs power 1-2 to supply power to the controller MCU system.

[0065] The controller MCU can process the input central control screen control signal 2-2 or the input level sensor signal 2-3, and then output the PWM pulse signal to the headlight height adjustment circuit 3 at the IO port 2-1. The input PWM pulse signal is filtered twice by the resistor R1 and the capacitor C1, the resistor R2 and the capacitor C2 to filter out the high-frequency AC and retain the DC part. After that, the DC signal is amplified by the negative feedback network composed of the amplifier U1 and the resistors R3, R4, R5 and R6, and then input to the headlight height adjustment controller 4 through the 4-2 signal port.

[0066] The headlight height adjustment controller 4 receives the amplified DC voltage signal and controls the motor to rotate so that the headlight reaches the corresponding position. According to the above control process, the finer the PWM pulse signal output by the controller MCU is divided, the more voltage levels are obtained after amplification, and the higher the adjustment degree of the headlight is.

[0067] In one embodiment, obtaining light height position information includes:

[0068] Receiving the light height position information to be adjusted input by the vehicle user on the human-machine interaction device, and obtaining the light height position information;

[0069] Or obtain the inclination angle data between the vehicle and the horizontal plane, and use the inclination angle data to calculate the height position information of the light, wherein the horizontal plane refers to the plane perpendicular to the direction of gravity.

[0070] In this embodiment, if the vehicle user selects the manual mode on the human-machine interaction device, the vehicle user selects the position degree on the human-machine interaction device to obtain the height position information of the light to be adjusted, that is, the light height position information is obtained.

[0071] After the vehicle user selects the automatic mode on the human-computer interaction device, the vehicle controller MCU obtains the inclination angle data of the level sensor installed in front of the vehicle, and obtains the height position information to be adjusted after processing the inclination angle data, wherein the inclination angle data refers to the inclination angle data between the vehicle and the horizontal plane, and the horizontal plane refers to the plane perpendicular to the direction of gravity. Specifically, a level sensor is placed in the front part of the car, and the level sensor is parallel to the horizontal plane at the same time, that is, when the vehicle is in a flat state, the angle between the level and the plane is zero. When the vehicle encounters a pothole section, uphill or downhill during driving, the angle between the vehicle and the horizontal plane changes. The level sensor can detect the inclination angle of the vehicle and the horizontal plane, so that the headlights can be lowered or raised according to the inclination angle information, so that the driver can be more aware of the road conditions ahead and ensure the safety of vehicle driving.

[0072] In one embodiment, the light height position information is calculated using the tilt angle data, including:

[0073] If the tilt angle data is a positive value, the light height position information is obtained based on the tilt angle data and the proportional coefficient, where the expression of the light height position information is:

[0074]

[0075] Where D is the light height position information, α is the tilt angle data, K is the proportional coefficient, and the proportional coefficient is a parameter that describes the quantitative relationship between the tilt angle data and the light height position information;

[0076] If the tilt angle data is a negative value, the absolute value of the tilt angle data and the proportional coefficient are used to obtain the light height position information, where the expression of the light height position information is:

[0077] D=|α|*K

[0078] Where D is the light height position information, α is the tilt angle data, and K is the proportional coefficient, which is a parameter that describes the quantitative relationship between the tilt angle data and the light height position information.

[0079] In this embodiment, within the normal range of headlight height adjustment, for example, when the controller MCU obtains the angle data of the level sensor, that is, the inclination angle data of the vehicle and the horizontal plane is α, the following can be divided into two cases: one is when the inclination angle data α is a positive value, that is, the vehicle is in an uphill situation, at this time, the inclination angle data α and the PWM pulse signal duty cycle are inversely proportional, that is, the larger the inclination angle data α, the smaller the corresponding PWM pulse signal duty cycle, that is, α=K / D, where K is the proportional coefficient, and D is the light height position information, that is, the PWM pulse signal duty cycle;

[0080] Second, when the tilt angle data α is a negative value, that is, the car is in a downhill situation, the absolute value of the tilt angle data |α| is positively proportional to the duty cycle, that is, the larger the absolute value of the tilt angle data α, the larger the corresponding PWM pulse signal duty cycle, that is, |α|=K*D, where K is the proportional coefficient and D is the light height position information, that is, the PWM pulse signal duty cycle.

[0081] It should be noted that K is a proportionality coefficient, which is a parameter describing the quantitative relationship between the tilt angle data and the light height position information, that is, a key parameter in the linear equation obtained when the tilt angle and the light height position information are in a linear relationship.

[0082] The proportional coefficient can be obtained through experiments. An experimental device that can accurately measure the tilt angle is built, and the corresponding PWM duty cycle can be recorded at the same time. After linear fitting of multiple tilt angle data and corresponding PWM duty cycles, the linear relationship between the two is obtained and then verified. If the error is large, recheck whether there is an error source in the experimental device and make adjustments to obtain the final proportional coefficient, or consider whether the relationship between them is not a simple linear relationship. If it is a nonlinear relationship, polynomial fitting or other more complex function fitting methods may be required. Therefore, the proportional coefficient can be determined according to actual needs.

[0083] S202: Filter the control signal using the regulating circuit to obtain a DC signal, amplify the DC signal, and after obtaining the amplified DC signal, send the amplified DC signal to the vehicle light regulating controller so that the regulating controller adjusts the vehicle light height according to the amplified DC signal, wherein the regulating circuit is the vehicle headlight height adjustment regulating circuit proposed in the above-mentioned embodiment.

[0084] In this embodiment, a corresponding PWM pulse signal is input to the adjustment circuit according to the height position information to be adjusted, and the filter circuit in the adjustment circuit filters the PWM pulse signal to obtain a DC signal. The DC signal is then amplified by a negative feedback network composed of an amplifier U1 and resistors R3, R4, R5, and R6. After obtaining the amplified DC signal, the amplified DC signal is sent to the headlight adjustment controller, so that the adjustment controller adjusts the headlight height according to the amplified DC signal.

[0085] In one embodiment, filtering the control signal to obtain a DC signal includes:

[0086] The cut-off frequency is calculated according to the capacitance value of the first capacitor, the capacitance value of the second capacitor, the resistance value of the first resistor and the resistance value of the second resistor in the regulating circuit;

[0087] The high frequency components of the control signal are filtered according to the cut-off frequency to obtain a DC signal.

[0088] In this embodiment, the cut-off frequency is obtained by calculating the cut-off frequency by selecting the resistance values ​​of the resistor R1 and the resistor R2 and the capacitance values ​​of the capacitor C1 and the capacitor C2 in the regulating circuit according to the method of R1*C1=R2*C2. The calculation formula is:

[0089]

[0090] In the formula, R1 is the resistance value of the resistor R1, R2 is the resistance value of the resistor R2, C1 is the capacitance value of the capacitor C1, and C2 is the capacitance value of the capacitor C2.

[0091] The high-frequency component in the PWM pulse signal output by the controller MCU can be filtered out by the cut-off frequency, thereby retaining the DC signal.

[0092] The vehicle headlight height adjustment device provided by the embodiment of the present invention comprises:

[0093] A control signal acquisition module is used to acquire light height position information and obtain a control signal according to the light height position information;

[0094] The regulating module is used to filter the control signal using the regulating circuit to obtain a DC signal, amplify the DC signal, and after obtaining the amplified DC signal, send the amplified DC signal to the vehicle light regulating controller so that the regulating controller adjusts the height of the vehicle light according to the amplified DC signal, wherein the regulating circuit is the regulating circuit for adjusting the height of the vehicle headlights proposed in the embodiment of the present invention.

[0095] In one embodiment, the control signal includes a first acquisition unit or a second acquisition unit,

[0096] The first acquisition unit is used to receive the light height position information to be adjusted input by the vehicle user on the human-computer interaction device, and obtain the light height position information;

[0097] The second acquisition unit is used to acquire the inclination angle data between the vehicle and the horizontal plane, and calculate the light height position information using the inclination angle data, wherein the horizontal plane refers to a plane perpendicular to the gravity direction.

[0098] In one embodiment, the light height position information is calculated using the tilt angle data, including:

[0099] If the tilt angle data is a positive value, the light height position information is obtained based on the tilt angle data and the proportional coefficient, where the expression of the light height position information is:

[0100]

[0101] Where D is the light height position information, α is the tilt angle data, K is the proportional coefficient, and the proportional coefficient is a parameter that describes the quantitative relationship between the tilt angle data and the light height position information;

[0102] If the tilt angle data is a negative value, the absolute value of the tilt angle data and the proportional coefficient are used to obtain the light height position information, where the expression of the light height position information is:

[0103] D=|α|*K

[0104] Where D is the light height position information, α is the tilt angle data, and K is the proportional coefficient.

[0105] In one embodiment, filtering the control signal to obtain a DC signal includes:

[0106] The cut-off frequency is calculated according to the capacitance value of the first capacitor, the capacitance value of the second capacitor, the resistance value of the first resistor and the resistance value of the second resistor in the regulating circuit;

[0107] The high frequency components of the control signal are filtered according to the cut-off frequency to obtain a DC signal.

[0108] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0109] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vehicle headlight height adjustment circuit, characterized in that: include: A filter circuit, wherein the filter circuit comprises a first resistor, a second resistor, a first capacitor and a second capacitor, Wherein, one end of the first resistor is connected to the controller, the other end of the first resistor is connected to one end of the second resistor, the other end of the first resistor is connected to one end of the first capacitor, and the other end of the second resistor is connected to one end of the second capacitor; A proportional amplification circuit, wherein the proportional amplification circuit comprises a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and an amplifier, Wherein, one end of the third resistor is connected to one end of the second capacitor, the other end of the third resistor is connected to one end of the fourth resistor, and the other end of the third resistor is connected to the non-inverting input end of the amplifier; The other end of the fifth resistor and one end of the sixth resistor are respectively connected to the inverting input end of the amplifier, the other end of the sixth resistor is connected to the output end of the amplifier, and one end of the fifth resistor is grounded.

2. The vehicle headlight height adjustment circuit according to claim 1, characterized in that: The positive pole of the power supply of the amplifier is connected to the positive pole of the power supply, and the negative pole of the power supply of the amplifier is connected to the ground.

3. The vehicle headlight height adjustment circuit according to claim 1, characterized in that: The amplification gain of the amplifier is determined according to the resistance values ​​of the third resistor and the fourth resistor.

4. The regulating circuit for adjusting the height of vehicle headlights as claimed in claim 1, characterized in that: The resistance value of the first resistor, the resistance value of the second resistor, the capacitance value of the first capacitor, and the capacitance value of the second capacitor are determined by a preset formula, wherein the preset formula is: R1*C1=R2*C2 In the formula, R1 is the resistance value of the first resistor, R2 is the resistance value of the second resistor, C1 is the capacitance value of the first capacitor, and C2 is the capacitance value of the second capacitor.

5. A method for adjusting the height of a vehicle headlight, characterized in that: include: Acquire light height position information, and output a control signal based on the light height position information; The control signal is filtered by an adjustment circuit to obtain a DC signal, the DC signal is amplified to obtain the amplified DC signal, and then the amplified DC signal is sent to a headlight adjustment controller so that the adjustment controller adjusts the headlight height according to the amplified DC signal, wherein the adjustment circuit is an adjustment circuit for adjusting the vehicle headlight height as described in any one of claims 1 to 4.

6. The vehicle headlight height adjustment method according to claim 5, characterized in that: The step of obtaining the light height position information includes: Receiving the light height position information to be adjusted input by the vehicle user on the human-machine interaction device, and obtaining the light height position information; Or obtain the inclination angle data between the vehicle and the horizontal plane, and use the inclination angle data to calculate and obtain the light height position information, wherein the horizontal plane refers to a plane perpendicular to the direction of gravity.

7. The vehicle headlight height adjustment method according to claim 5, characterized in that: The step of calculating the light height position information by using the tilt angle data includes: If the tilt angle data is a positive value, the light height position information is obtained based on the tilt angle data and the proportional coefficient, wherein the expression of the light height position information is: Wherein, D is the light height position information, α is the tilt angle data, and K is the proportionality coefficient, which is a parameter describing the quantitative relationship between the tilt angle data and the light height position information; If the tilt angle data is a negative value, the light height position information is obtained by using the absolute value of the tilt angle data and the proportional coefficient, wherein the light height position information is expressed as: D=|α|*K Wherein, D is the light height position information, α is the tilt angle data, and K is the proportionality coefficient, which is a parameter describing the quantitative relationship between the tilt angle data and the light height position information.

8. The vehicle headlight height adjustment method according to claim 5, characterized in that: The filtering process of the control signal to obtain a DC signal includes: Calculating a cutoff frequency according to a capacitance value of a first capacitor, a capacitance value of a second capacitor, a resistance value of a first resistor, and a resistance value of a second resistor in the regulating circuit; The high frequency component of the control signal is filtered according to the cut-off frequency to obtain a direct current signal.

9. A vehicle headlight height adjustment device, characterized in that: include: A control signal acquisition module, used to acquire light height position information and output a control signal based on the light height position information; The regulating module is used to filter the control signal using the regulating circuit to obtain a DC signal, amplify the DC signal, and after obtaining the amplified DC signal, send the amplified DC signal to the headlight regulating controller so that the regulating controller adjusts the headlight height according to the amplified DC signal, wherein the regulating circuit is the headlight height regulating circuit as described in any one of claims 1 to 4.

10. The vehicle headlight height adjustment device according to claim 9, characterized in that: The control signal includes a first acquisition unit or a second acquisition unit, Wherein, the first acquisition unit is used to receive the light height position information to be adjusted input by the vehicle user on the human-computer interaction device, and obtain the light height position information; The second acquisition unit is used to acquire the inclination angle data between the vehicle and the horizontal plane, and use the inclination angle data to calculate and obtain the light height position information, wherein the horizontal plane refers to a plane perpendicular to the direction of gravity.

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