KR101869841B1

KR101869841B1 - Wiper drive

Info

Publication number: KR101869841B1
Application number: KR1020170049332A
Authority: KR
Inventors: 이영민; 김태헌; 황혜련
Original assignee: 주식회사 캐프
Priority date: 2017-04-17
Filing date: 2017-04-17
Publication date: 2018-06-22

Abstract

Disclosed is a wiper driving apparatus. The wiper driving apparatus comprises: a wiper motor providing a wiper arm with a rotational force; a motor controller controlling the speed of the wiper motor; and a rotating input unit transferring an electrical signal to the motor controller. The rotating input unit can be rotated in the both directions and continuously generate an acceleration signal and a reduction signal when rotating in one direction and the other direction, respectively. Moreover, the motor controller can continuously change the speed of the wiper motor in response to the continuous acceleration signal and the reduction signal.

Description

Wiper drive < RTI ID = 0.0 >

The present invention relates to a wiper drive apparatus.

Generally, in the case of an automobile in operation, contamination of the windshield surface due to dust or various foreign substances in the air or snow due to the weather condition makes it difficult to secure visibility, which hinders safe operation. Accordingly, the automobile is provided with a vehicle wiper for wiping snow, rain or foreign matter on the windshield side as means for securing the watch for safe driving of the driver.

However, since the conventional wiper driving apparatus operates at a predetermined number of steps, it is not enough for the user to operate the wiper at a desired speed.

SUMMARY OF THE INVENTION The present invention provides a wiper drive device that allows a user to operate a wiper at a desired speed.

A wiper motor for providing a rotational force to the wiper arm, a motor control unit for controlling a speed of the wiper motor, and a rotary input unit for transmitting an electric signal to the motor control unit, wherein the rotary input unit is rotatable in both directions, And the motor control unit continuously changes the speed of the wiper motor in accordance with the continuous acceleration signal and the deceleration signal.

The wiper drive apparatus according to the present invention can continuously change the speed of the wiper so that the user can set a desired wiper operation speed.

In addition, the wiper driving apparatus according to the present invention can quickly search a wiper speed desired by the user.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view for explaining a configuration of a wiper drive apparatus according to an embodiment of the present invention; Fig.
2 is a view for explaining a non-contact type sensor of a wiper drive apparatus according to an embodiment of the present invention.
FIGS. 3 and 4 are diagrams illustrating changes in the speed and acceleration of the wiper according to the rotation amount and rotation speed of the rotary input unit in the wiper drive apparatus according to the embodiment of the present invention. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view for explaining a configuration of a wiper driving apparatus according to an embodiment of the present invention.

The wiper driving apparatus according to an embodiment of the present invention includes a wiper motor 10, a motor control unit 20, and a rotary input unit 30.

The wiper motor 10 is a portion that provides a rotational force so that the wiper arm 5 connected to the wiper 6 reciprocates. The wiper motor 10 may be connected to the wiper arm 5 through a wiper linkage (not shown) or the like. The wiper motor 10 includes an electric motor, and the rotational speed of the electric motor is changed in accordance with the characteristics of the current and voltage to be transmitted.

For example, a direct current (DC) motor is used as the wiper motor 10, and a direct current motor can be controlled in a pulse-width modulation (PWM) mode in which a voltage is applied. On the other hand, the wiper motor 10 is not limited to a DC motor, but includes various types of motors capable of providing a rotational force to the wiper arm 5.

The motor control unit 20 controls the speed of the wiper motor 10. The motor control unit 20 can adjust the current and the voltage according to the manner of the wiper motor 10. [

For example, when the DC motor is used as the wiper motor 10, the motor control unit 20 can control the duty ratio of the voltage applied to the motor by using the PMW control. Specifically, the rotation speed of the direct current motor can be adjusted by forming a pulse for turning on / off the motor driving power at regular intervals and changing the duty ratio of the pulse (ratio of On time to Off time).

The rotary input unit 30 is capable of bi-directional rotation and senses rotation to generate an acceleration signal and a deceleration signal. Since the rotary input unit 30 is bi-directionally rotatable, an acceleration signal can be generated when it rotates in one direction and a deceleration signal can be generated when it is rotated in another direction.

Referring to FIG. 1, the rotary input unit 30 may include a jog dial 32. For example, the jog dial 32 may be rotated in the clockwise direction to generate an electrical signal in the clockwise direction, and a signal generated in the clockwise direction may be used as the acceleration signal. Then, the jog dial 32 is rotated in the counterclockwise direction to generate an electrical signal in the counterclockwise rotation, and a signal generated in the counterclockwise rotation can be used as the deceleration signal.

At this time, the jog dial 32 may include a rotary encoder for recognizing the rotation direction and the rotation angle and generating an electric signal. A rotary encoder is a sensor used to measure the rotation angle or rotation speed of a rotating mechanism. The incremental expression of a rotary encoder can generate a pulse every time the axis rotates a certain amount of angle, and can detect the rotation angle by counting the number of pulses. The jog dial 32 using the incremental rotary encoder can rotate in both directions in an infinite direction and generates an electric signal by detecting only the rotation direction and the rotation amount relative to the current position of the jog dial 32 . In addition, the absolute rotary encoder can detect the absolute position of the rotary shaft in relation to a specific portion of the rotary shaft and the signal line.

On the other hand, the rotary input unit 30 can detect rotation using a non-contact type sensor. The jog dial 32 using the non-contact type sensor can also be configured to rotate in both directions in an infinite manner. 2 is a view for explaining a non-contact type sensor of a wiper driving apparatus according to an embodiment of the present invention.

The non-contact type sensor may include a metal body 34 rotatable with respect to the coil 37 and the coil 37. [ Referring to FIG. 2, the metal body 34 may be rotated on the substrate 36 on which the coil 37 is formed, and the area of the metal body 34 passing over the coil 37 may be changed. For example, a through area 35 may be formed in the metal body 34 to change the area of the metal body 34 passing over the coil 37 when the metal body 34 rotates. At this time, when the alternating current is supplied to the coil 37, the inductance of the coil 37 changes according to the change of the area of the metal body 34. Accordingly, the change in inductance of the coil 37 can be sensed, and the amount of rotation and rotation of the metal body 34 can be detected.

Referring to FIG. 1, in this embodiment, the substrate 36 on which the coil 37 is formed is installed on the operation lever, and the jog dial 32 is provided with the metal body 34.

The rotary type input unit 30 may include a rotary encoder, a non-contact type sensor, and various rotation detection sensors capable of recognizing the rotation direction and the rotation angle.

In the present invention, the rotary input unit 30 can continuously generate an electrical signal while being rotated. At this time, the motor control unit 20 can detect a continuous electric signal generated in the rotary input unit 30 and calculate the rotation angle and the rotation speed of the rotary input unit 30 according to the time. In accordance with this, the speed of the wiper motor 10 can be continuously controlled.

For example, when the jog dial 32 rotates twice in the clockwise direction, the wiper can be set to operate at the maximum speed. The angle of 720 degrees which is twice the angle of rotation of the jog dial 32 can be divided into a very large number of angles and the rotational speed of the wiper motor 10 can be set in accordance with each segmented angle. Accordingly, the user can experience a continuous increase in the speed of the wiper during the two-turn rotation of the jog dial 32, and set the most appropriate wiper speed. Conversely, if the user rotates the jog dial 32 in the counterclockwise direction, a continuous decrease of the wiper speed can be sensed.

FIGS. 3 and 4 are views illustrating changes in the speed and acceleration of the wiper according to the rotation amount and the rotation speed of the rotary input unit in the wiper driving apparatus according to the embodiment of the present invention.

Referring to FIG. 3, the rotation angle of the jog dial 32 may be linearly proportional to the rotation speed of the wiper motor 10. That is, the motor control unit 20 can be set such that the wiper speed is increased / decreased to the same degree as the amount of turning the jog dial 32. On the other hand, it is also possible to set various proportional relationships such as early or delayed wiper speed increase.

Referring to FIG. 4, the rotational speed of the jog dial 32 may be linearly proportional to the rotational acceleration of the wiper motor 10. That is, the motor control unit 20 can be set so that the wiping speed is changed more rapidly as the jog dial 32 is turned rapidly. Accordingly, if the user rotates the jog dial 32 slowly, the change in the speed of the wiper can be checked slowly. If the user quickly turns the wiper, the speed of the desired wiper can be reached quickly. On the other hand, in the initial stage, various proportional relationship setting such as speeding up or slowing down the wiper speed change is possible.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims And changes may be made without departing from the spirit and scope of the invention.

Many embodiments other than the above-described embodiments are within the scope of the claims of the present invention.

5: Wiper arm
6: Wiper
10: Wiper motor
20: Motor control section
30: Rotary input unit

Claims

A wiper motor for providing rotational force to the wiper arm;
A motor control unit for controlling a speed of the wiper motor; And
And a rotary input unit for transmitting an electric signal to the motor control unit,
Wherein the rotary input unit is capable of rotating in both directions and generates an acceleration signal and a deceleration signal continuously when the rotary input unit is rotated to one side and the other side,
Wherein the motor control unit continuously changes the speed of the wiper motor in accordance with the continuous acceleration signal and the deceleration signal,
Wherein the rotary input unit includes a jog dial, a coil, and a non-contact type sensor having a metal body mounted on the jog dial so as to be rotatable with respect to the coil,
Wherein the non-contact type sensor senses a change in inductance of the coil when the metal body rotates.

delete

The method according to claim 1,
Wherein the jog dial includes a rotary encoder for recognizing a rotation direction and a rotation angle.

delete

The method according to claim 1,
The rotation angle of the jog dial is proportional to the rotation speed of the wiper motor,
Wherein the rotation speed of the jog dial is proportional to the rotation acceleration of the wiper motor.

The method according to claim 1,
The motor control unit controls the speed of the wiper motor by a PWM (Pulse-Width Modulation) method.