KR100668488B1 - Steering Wheel Angular Velocity Sensor - Google Patents

Abstract

The present invention provides a main gear interlocked with the steering wheel, by providing a magnetic material in the interlocking gear that is rotated in engagement with the main gear to detect the magnetic force change of the magnetic material with a sensor to detect the high resolution angle and angular velocity of the steering device An angular velocity detection device for a vehicle steering apparatus, the roll connector having a sleeve pivotably mounted on a steering column of the vehicle, a main gear formed on the sleeve, a first interlocking gear rotating in engagement with the main gear; A first magnetic body interlocking with the first interlocking gear, a second interlocking gear interlocked with the main gear, and having a different rotation ratio from the first interlocking gear, a second magnetic body interlocking with the second interlocking gear, and It provides an angular velocity detection device for steering apparatus comprising a first, second detection sensor for detecting a change in magnetic force of the first, second magnetic material. It is.

Angle, angular velocity, steering wheel, steering wheel, magnetic material, magnet,

Description

Angular velocity sensor for automobile steering system {Steering Wheel Angular Velocity Sensor}

1 is a schematic view showing a conventional steering device.

2 is a schematic view showing an angle sensing device installed in FIG.

Figure 3 is a perspective view showing a preferred embodiment of the angular velocity sensor for a vehicle steering apparatus according to the present invention.

Figure 4 is an exploded perspective view showing an angular velocity sensor for a vehicle steering apparatus according to the present invention.

5 is a bottom view showing an angular velocity sensor for a vehicle steering apparatus according to the present invention.

FIG. 6 is a cross-sectional view of a portion “I-I” of FIG. 5.

* Explanation of symbols for main parts of drawings *

10: steering wheel 20: steering column

30: roll connector 40: sleeve

100: angular velocity sensor 110: main body

111: opening 112: space

120, 120 ': Interlocking gear 121, 121': Magnetic material

122, 122 ': Axis 130, 130': Sensor

140: holder 141, 141 ': shaft hole

150: main gear

The present invention relates to an angular velocity detecting device for a vehicle steering apparatus, and more particularly, to provide a main gear interlocked with a steering wheel, and to provide a magnetic body in an interlocking gear that is engaged with the main gear to detect a change in magnetic force of the magnetic body. The high resolution angle and angular velocity of the steering system can be detected.

In general, a steering device which is essentially applied to a vehicle is a device for changing a direction and a direction of a vehicle according to a user's request, and basically a steering wheel 2 operated by a user as shown in FIG. 1. In addition, the steering column 3 is rotated in the same manner as the steering wheel 2, and the cable is unrolled and wound repeatedly so that the steering wheel 1 can be installed to control various functions of the vehicle. The steering roll connector 4, which is so wound up, and the angle sensing device 1 installed on the steering column 3 to detect an angle of the steering wheel 2 are installed.

As shown in FIG. 2, the angle detecting device 1 rotates together with the steering column 3 by the rotation of the steering wheel 2 and forms a plurality of holes 1a 'on the surface thereof. It consists of an angle sensor (1b) to read this process by processing only the signal detected by the angle sensor (1b) was used to calculate the angle and direction of the steering wheel (2), the angular velocity and the like.

However, the angle detection device 1 has a resolution of the angle of about 2 to 5 degrees and could not obtain more accurate angle and angular velocity values due to structural limitations. In addition, there was an inadequate aspect for steering an unmanned vehicle that requires a resolution of at least 0.1 degrees in the future.

Therefore, in order to increase the resolution, Korean Patent Publication No. 54235, "Angle Sensing Device for Steering Shaft for Steering Device of Automobile," was proposed in 1998.

This simply reads the rotated angle along with the steering wheel from a compact disk containing neutral and angle, which slightly improves the resolution, but did not meet the required resolution. A separate control unit is required, and there is a problem in that information such as each rotated angle, neutral, and angle must be recorded on the compact disc.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide an angular velocity detection device for a vehicle steering apparatus which can minimize an error rate.

In addition, another object of the present invention to provide an angular velocity detection device for a vehicle steering apparatus that can exhibit a high resolution angular velocity performance according to the steering wheel rotation.

An angular velocity detecting device for a vehicle steering apparatus according to the present invention for achieving the above object includes a roll connector in which a sleeve is pivotally rotated on the steering column, a main gear formed in the sleeve, and a first rotation meshing with the main gear. An interlocking gear, a first magnetic body interlocking with the first interlocking gear, a second interlocking gear interlocking with the main gear, having a different rotation ratio from the first interlocking gear, and a second magnetic interlocking with the second interlocking gear; And, it characterized in that it comprises a first, second detection sensor for detecting a change in the magnetic force of the first, the second magnetic body.

Here, the angular velocity sensing device for the steering apparatus is provided with a holder having two shaft holes for fixing the shaft of the first and second interlocking gears to fix the shafts of the first and second interlocking gears.

In addition, the first and second detection sensors are provided by selecting any one of an anisotropic magneto resistive (AMR) sensor or a giant magneto resistance (GMR) sensor.

In addition, the first and second detection sensors are respectively installed in the lower portion of the first, second interlocking gear to be spaced apart by less than 20mm.

Hereinafter, a preferred embodiment of the angular velocity sensor for a vehicle steering apparatus according to the present invention will be described with reference to the drawings.

In the following description of the present invention, the terms defined are defined in consideration of functions in the present invention, and should not be understood as a meaning of limiting the technical components of the present invention.

3 is a perspective view showing a preferred embodiment of the angular velocity sensor for a vehicle steering apparatus according to the present invention, Figure 4 is an exploded perspective view showing an angular velocity sensor for a vehicle steering apparatus according to the present invention, Figure 5 is a vehicle steering according to the present invention Bottom view showing the angular velocity sensor for the device from the bottom. 6 is a sectional view showing an angular velocity sensor for a vehicle steering apparatus according to the present invention.

As shown in FIG. 3, the vehicle steering apparatus sensor according to the present invention is installed as a roll connector 30 in a steering column 20 which is rotated by a user driving a steering wheel 10 directly in a vehicle interior.

The roll connector 30 has an airbag installed on an upper surface of the steering wheel 10 for the safety of the user, and a cable according to the rotation of the steering wheel 10 to enable the various functions to be operated. Not shown) is a structure that is smoothly wound or unwinded. Therefore, the sleeve 40 which is directly fixed to the steering column 20 and rotated is provided at the center of the roll connector 30 so that the twisting of the cable due to the rotation of the steering column 20 is not generated.

As shown in FIG. 4, the angular velocity detector 100 forms an main body 110 by providing an opening 111 to allow the steering column 20 and the main gear to be described later to enter and exit the center. And one side of the main body 110 is extended to form a space portion 112 of a predetermined size. In addition, a cover 110 ′ may be formed to cover the main body 110 except for the opening 111.

The opening 111 has a main gear 150 that is rotated by direct or indirect coupling with the steering column 20. Here, the main gear 150 is fixed to the steering column 20 is preferably formed integrally with the main gear 150 in the sleeve 40 is rotatably installed in the roll connector 30.

The space 112 on one side of the main body 110 is provided with first and second interlocking gears 120 and 120 'which are engaged with the main gear 150 and rotated apart from each other. In addition, the first and second interlocking gears 120 and 120 ′ are partially exposed to the inner opening 111 to engage with the main gear 150. In addition, the first interlocking gear 120 and the second interlocking gear 120 'may have different diameters or different numbers of teeth so that the first interlocking gear 120 and the second interlocking gear 120 may rotate in response to the rotation of the main gear 150. The rotation ratio of ') is installed differently.

In addition, first and second magnetic bodies 121 and 121 'are respectively provided below the first interlocking gear 120 and the second interlocking gear 120'. Here, the installation positions of the first and second magnetic bodies 121 and 121 'are installed on the shafts 122 and 122' or on the bottom or the upper surface of the interlocking gears 120 and 120 '. In another embodiment, the interlocking gears 120 and 120 'may be integrally formed of a magnetic material such as a magnet or a metal having magnetic properties.

Below the interlocking gears 120 and 120 ', first and second sensing sensors 130 and 130' are provided to detect a change in magnetic force of the magnetic bodies 121 and 121 'installed in the interlocking gears 120 and 120'. do. Here, the first and second detection sensors 130 and 130 'are magnetic sensors for detecting a change in magnetic force, and the type of the first and second detection sensors 130 and 130 ′ is selected by selecting one of an Aisotropic Magneto Resistive (AMR) sensor and a Giant Magneto Resistance (GMR) sensor. do.

As shown in FIG. 6, the detection sensor 130 may be installed below the interlocking gears 120 and 120 ′ so as to be spaced apart by 20 mm or less to detect a change in magnetic force.

Axes 122 and 122 'of the first and second interlocking gears 120 and 120' are disposed between the first and second interlocking gears 120 and 120 'and the first and second detection sensors 130 and 130'. ) Is preferably fixed by providing a holder 140 formed with two shaft holes 141 and 141 'for fixing and preventing play.

Hereinafter will be described the operation of the angular velocity sensor for a vehicle steering apparatus according to an embodiment of the present invention configured as described above. In addition, since the rotation of both sides of the steering wheel 10 operates in the same path, the operation of the angular velocity sensor 100 will be described by way of example only by rotating the steering wheel 10 clockwise.

When the user rotates the steering wheel 10 in the vehicle clockwise, the steering column 20 which rotates in the same direction as the steering wheel 10 rotates in the clockwise direction, and the steering column 10 and the fixed sleeve 40 are fixed. ) And the main gear 150 installed in the sleeve 40 rotates clockwise.

Thereafter, the two first and second interlocking gears 120 and 120 'meshing with the main gear 150 are rotated counterclockwise by the rotation of the main gear 150, and the first and second interlocking are rotated counterclockwise. The first and second magnetic bodies 121 and 121 'installed under the gears 120 and 120' also rotate together.

Thereafter, the first and second detection sensors 130 and 130 ', which detect the change in the magnetic force of the first and second magnetic bodies 121 and 121', which are rotated, detect the change in the magnetic force and process the change in the magnetic force generated at this time. The angle and acceleration will be measured.

In this case, when an anisotropic magneto resistive (AMR) sensor is provided in the first and second detection sensors 130 and 130 ', an angle and an angular velocity of 0.1 ° or more can be detected, and when a magnetor magneto resistance (GMR) sensor is provided. Will be more precise.

The maximum detection range of the angle and the angular velocity is determined by the number of teeth of the first and second interlocking gears 120 and 120 'and the main gear 150 having different teeth. That is, the rotation angle at which the first and second interlocking gears 120 and 120 'are initially positioned by continuously rotating the steering column 20 is the maximum sensing range.

The maximum sensing range is calculated by dividing the first and second interlocking gears 120 and 120 'and the main gear 112 by the greatest common divisor so that the number of teeth becomes an integer. The number of rotations of the maximum detection range can be calculated by multiplying the number of teeth of the first interlocking gear 120 by the number of teeth of the second interlocking gear 120 'and dividing it by the number of teeth of the main gear 150.

For example, if the number of teeth of the first interlocking gear 120 is 56, the number of teeth of the second interlocking gear 120 'is 52, and the main gear 150 is 112, the number of teeth is the greatest common factor of 4. Handing out. 14:13:28, which is calculated as (14 × 13) ÷ 28 = 6.5 (number of revolutions in the maximum detection range).

By converting the maximum detectable range into degrees, the angle and angular velocity can be measured with resolutions of 0.1 ° or more up to 6.5 × 360 ° = 2340 °.

Although the technical idea of the angular velocity detecting device for a vehicle steering apparatus according to the present invention has been described with the accompanying drawings, this is illustrative of the best embodiment of the present invention and is not intended to limit the present invention. Therefore, it is apparent that any person skilled in the art can make various modifications and imitations such as dimensions, shapes, structures, etc. without departing from the scope of the technical idea of the present invention.

As described above, the angular velocity detection device for an automobile steering apparatus of the present invention configured by forming an interlocking gear having a magnetic body, a sensing sensor detecting a change in magnetic force of the magnetic body, and a main gear driving the interlocking gear in a sleeve is as follows. Provides the same effect.

First, the main gear is formed in the sleeve to remove the error due to the play of the key (key) when installing the main gear directly to the steering column.

Second, the main gear is formed in the sleeve to reduce the number of parts.

Third, there is an effect of exhibiting high resolution angular velocity performance by detecting a change in magnetic force due to the steering wheel rotation.

Claims (4)

A first gear interlocked with the main gear and the first gear and a second interlocking gear having a different rotation ratio, and a first interlocking gear that rotates in engagement with the main gear in a lower portion of the roll connector with which the sleeve is pivoted on the steering column of the vehicle. In the angular velocity detection device comprising a second magnetic body, the first and second detection sensors for detecting a change in the magnetic force of the first and second magnetic bodies, The main gear is formed integrally with the sleeve provided in the roll connector, The first and second interlocking gears may be provided with a holder having two shaft holes for fixing the first and second interlocking gear shafts, thereby detecting the angular velocity of the first and second interlocking gears. Device. delete The angular velocity detection device of claim 1, wherein the first and second detection sensors are provided by selecting any one of an anisotropic magneto resistive (AMR) sensor and a giant magneto resistance (GMR) sensor. The angular velocity detection device of claim 1, wherein the first and second detection sensors are respectively disposed below the first and second interlocking gears by 20 mm or less.

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