Control method for improving starting adjustment comfort of automobile seat

Abstract

The invention relates to a control method for improving the starting adjustment comfort of an automobile seat, and the method comprises the steps: S1, carrying out the information collection of a seat movement motor, and enabling the collected information to comprise the operation pulse width S of the motor, the power supply working voltage U and the movement direction D of the motor; s2, calculating the pulse width P of the motor in the next period according to the instruction for adjusting the seat motor; s3, the motion direction and the pulse width of the motor in the next period are determined according to the pulse width P, and finally the motion smoothness of the electric seat adjusting operation is achieved through the speed increasing and speed reducing operation of the motor; the method has the advantages that according to a pulse width calculation mode, a characteristic table of different motor stroke weight coefficients w is formulated for different strokes or other working intervals of the seat position motor, and different comfort requirements are flexibly met.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, and in particular to a control method for improving the comfort of starting and adjusting an automobile seat. Background Art

[0002] At present, most three-row seats are uncomfortable to sit in. The reason is that after the three-row backrest is unfolded, it cannot support large passengers when adjusted forward; there is a strong sense of frustration when adjusting the three-row backrest. For example, the existing patent CN201921956607.1 discloses a utility model patent named "A Comfortable Adjustable Car Seat". Although this mechanism can adjust the comfort of the car seat to prevent passengers from being pinched, it has the following problems: 1. It relies on soft inflatable bags, 2. It adds related control modules such as air sources, which increases the cost of the seat. Summary of the invention

[0003] In view of the above problems, the purpose of the present invention is to provide a control method for improving the comfort of automobile seat starting adjustment, which is used to adjust the smooth movement of the seat motor. The seat controls the motor operation in a periodic PWM manner to overcome the shortcomings of the above-mentioned prior art.

[0004] A control method for improving the comfort of starting and adjusting a car seat comprises the following steps:

[0005] Step S1: collecting information from the seat motion motor, wherein the collected information includes: motor operation pulse width S, power supply working voltage U and motor motion direction D;

[0006] Step S2, calculating the pulse width P of the motor in the next cycle according to the instruction for adjusting the seat motor;

[0007]

[0008] P=λ*(S+(w*DS)3*K1+(w*DS)*K2);

[0009] Among them, λ is the working voltage compensation coefficient at the current sampling moment, w is the motor stroke weight coefficient, 13.5 is the working default voltage, the slow change coefficient K1 is the first-level slow change coefficient, and K2 is the first-level slow change coefficient;

[0010] Step S3: Determine the motor's next cycle movement direction and pulse width based on the pulse width P, and ultimately achieve smoothness of the electric seat adjustment operation through motor speed increase and speed decrease operations.

[0011] As a preferred embodiment of the present invention, in step S2, the motor movement direction D has three states: forward, backward and stop; the forward and backward states indicate that the motor is in motion, and the value is 1; the stop state indicates that the motor should tend to a stationary state, so the value is 0.

[0012] As a preferred embodiment of the present invention, in step S2, the controller records the current pulse width S of the motor, that is, after calculating the pulse width P of the next cycle, the current P value is recorded and saved, and assigned to the S value of the next cycle.

[0013] As a preferred embodiment of the present invention, in step S2, the motor stroke weight coefficient w is greater than 100% and less than 0% at the two ends of the motor stroke, and the movement stops after exceeding the two ends of the motor stroke.

[0014] As a preferred embodiment of the present invention, in step S2, the value range of K1 is 0.00005-0.0001, and the value range of K2 is 0.1-2.

[0015] The advantages and positive effects of the present invention are:

[0016] 1. The present invention formulates a characteristic table of different motor stroke weight coefficients w for different motor strokes or other working ranges of the seat position motor based on the pulse width calculation method, so as to flexibly meet different comfort requirements.

[0017] 2. After the calibration coefficient λ is used for different seats, the present invention can save it in the seat controller to adapt to the mechanical or electrical characteristics of different seats.

[0018] 3. The present invention does not require additional mechanisms or devices, and improves the dynamic riding comfort of passengers based on the original static comfort design of the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the backrest adjustment range of this embodiment 2.

[0020] Figure 2 This is a comparison diagram of the backrest motor speed optimization of this embodiment 2.

[0021] Figure 3 This is the motor stroke weight trend diagram of this embodiment 3. DETAILED DESCRIPTION

[0022] Example 1

[0023] This embodiment provides a control method for improving the comfort of starting and adjusting a car seat, including the following steps:

[0024] Step S1: collecting information from the seat motion motor, wherein the collected information includes: motor operation pulse width S, power supply working voltage U and motor motion direction D;

[0025] Step S2, calculating the pulse width P of the motor in the next cycle according to the instruction for adjusting the seat motor;

[0026]

[0027] P=λ*(S+(w*DS)3*K1+(w*DS)*K2);

[0028] Among them, λ is the working voltage compensation coefficient at the current sampling moment, w is the motor stroke weight coefficient, 13.5 is the working default voltage, the slow change coefficient K1 is the first-level slow change coefficient, and K2 is the first-level slow change coefficient;

[0029] Step S3: Determine the motor's next cycle movement direction and pulse width based on the pulse width P, and ultimately achieve smoothness of the electric seat adjustment operation through motor speed increase and speed decrease operations.

[0030] Example 2

[0031] See also Figure 1-2 This embodiment provides a control method for improving the comfort of starting and adjusting automobile seats, so as to solve the problem that after the three rows of backrests are unfolded, they cannot be adjusted forward to support larger passengers; and there is a strong sense of frustration when adjusting the three rows of backrests.

[0032] The specific steps include:

[0033] Step S1: collecting information from the seat motion motor, wherein the collected information includes: motor operation pulse width S, power supply working voltage U and motor motion direction D;

[0034] Step S2, according to the instruction of adjusting the seat motor, calculating the pulse width P of the motor in the next cycle, wherein the instruction of adjusting the seat motor is to divide the backrest into support and anti-pinch intervals, the backrest motor outputs a larger torque in the support interval; and the motor torque is reduced in the anti-pinch interval;

[0035]

[0036] P=λ*(S+(w*DS)3*K1+(w*DS)*K2);

[0037] Among them, λ is the working voltage compensation coefficient at the current sampling moment, w is the motor stroke weight coefficient, 13.5 is the working default voltage, the slow change coefficient K1 is the first-level slow change coefficient, and K2 is the first-level slow change coefficient;

[0038] Step S3: Determine the direction of movement and pulse width of the motor in the next cycle according to the pulse width P, and finally achieve the adjustment operation of the motor speed increase and speed decrease to achieve a larger torque output of the backrest motor in the support area and a lower torque output of the motor in the anti-pinch area.

[0039] Example 3

[0040] In this embodiment, in order to improve the comfort of seat adjustment, the motor is controlled by precise PWM. The system working voltage is collected in real time, and the motor operation information of the next cycle is calculated based on the current duty cycle and movement direction of the motor, so as to achieve precise increase or decrease of the motor movement speed and improve the comfort of seat adjustment.

[0041] Step S1: collecting information from the seat motion motor, wherein the collected information includes: motor operation pulse width S, power supply working voltage U and motor motion direction D;

[0042] Step S2, calculating the pulse width P of the motor in the next cycle according to the instruction for adjusting the seat motor;

[0043] P=λ*(S+(w*DS)3*K1+(w*DS)*K2),

[0044] Step S2.1: Parameter selection,

[0045] The operating voltage U is collected and recorded in real time by the controller;

[0046] Compensation coefficient λ: The seat motor has different operating speeds under different operating voltages, and changes linearly with the supply voltage. To ensure that the motor movement speed is the same under different voltages, the calculation formula is as follows:

[0047]

[0048] Among them, 13.5 is the default working voltage, and all the following parameters are calibrated under this voltage condition;

[0049] Step S2.2: Motor movement direction D,

[0050] The motor movement direction has three states: forward, backward and stop. The forward and backward states indicate that the motor is in motion, and the calculation should be combined with the stroke weight coefficient, and the value is 1. The stop state indicates that the motor should tend to a stationary state, so the value is 0.

[0051] Step S2.3: Pulse width S,

[0052] The controller records the current pulse width of the motor, that is, after calculating the pulse width P of the next cycle, it records and saves the current P value and assigns it to the S value of the next cycle.

[0053] Step S2.4: Motor stroke weight coefficient w,

[0054] The relationship between motor travel weight and motor travel is as follows:

[0055]

[0056] In the above table, values ​​greater than 100% and less than 0% are the two ends of the motor stroke. If the stroke is exceeded, the motor should stop moving, so the value is 0. Other values ​​are obtained by measuring and calibrating the standard seat.

[0057] Step S2.5: Slow change coefficient K, the slow change coefficient K includes: primary slow change K1 and secondary slow change K2;

[0058] The value range of K1 is 0.00005 to 0.0001, and the value range of K2 is 0.1 to 2. After actual driving experience, K1 is selected as 0.000075 and K2 is selected as 0.13.

[0059] Step S3: Determine the motor's next cycle movement direction and pulse width based on the pulse width P, and ultimately achieve smoothness of the electric seat adjustment operation through motor speed increase and speed decrease operations.

[0060] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A control method for improving the comfort of starting and adjusting a car seat, characterized in that: Includes the following steps: Step S1: collecting information from the seat motion motor, wherein the collected information includes: motor operation pulse width S, power supply working voltage U and motor motion direction D; Step S2, calculating the pulse width P of the motor in the next cycle according to the instruction for adjusting the seat motor; P=λ*(S+(w*DS)3*K1+(w*DS)*K2); Among them, λ is the working voltage compensation coefficient at the current sampling moment, w is the motor stroke weight coefficient, 13.5 is the working default voltage, the slow change coefficient K1 is the first-level slow change coefficient, and K2 is the first-level slow change coefficient; Step S3: Determine the motor's next cycle movement direction and pulse width based on the pulse width P, and ultimately achieve smoothness of the electric seat adjustment operation through motor speed increase and speed decrease operations.

2. A control method for improving the comfort of vehicle seat startup adjustment according to claim 1, characterized in that: In step S2, the motor movement direction D has three states: forward, backward and stop; the forward and backward states indicate that the motor is moving, and the value is 1; the stop state indicates that the motor should move toward a stationary state, so the value is 0.

3. A control method for improving the comfort of vehicle seat startup adjustment according to claim 1, characterized in that: In step S2, the controller records the current pulse width S of the motor, that is, after calculating the pulse width P of the next cycle, the current P value is recorded and saved, and assigned to the S value of the next cycle.

4. A control method for improving the comfort of vehicle seat startup adjustment according to claim 1, characterized in that: In step S2, the motor stroke weight coefficient w is greater than 100% and less than 0% at the two ends of the motor stroke, and the motor stops moving after exceeding the two ends of the motor stroke.

5. A control method for improving the comfort of vehicle seat startup adjustment according to claim 1, characterized in that: In step S2, the value range of K1 is 0.00005-0.0001, and the value range of K2 is 0.1-2.

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