KR101645312B1 - Hall sensor test apparatus - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hall sensor testing apparatus, and more particularly, to a hall sensor testing apparatus capable of testing operation performance and durability by driving a hall sensor used in CMPS, CKPS, and ATSS in a condition similar to an actual vehicle environment.
The Hall sensor test apparatus of the present invention includes: a measurement chamber that is disposed at a distance from a target wheel on at least one coaxial target wheel, Wow; A motor driving unit for rotating the shaft on which the at least one target wheel is mounted; An optical sensor disposed on an inner surface of the jig coaxially with a position where the hall sensor is mounted; And an operation unit for comparing the signal measured by the hall sensor and the signal measured by the optical sensor to determine whether the hall sensor is defective or not.

Description

[0001] HALL SENSOR TEST APPARATUS [0002]

[0001] The present invention relates to a Hall sensor tester, and more particularly to a camshaft position sensor (CMPS), a crankshaft position sensor (CKPS), an active transmission speed sensor (ATSS) To a Hall sensor test apparatus capable of testing operation performance and durability by driving the Hall sensor in a condition similar to an actual vehicle environment.

2. Description of the Related Art [0002] In recent years, magnetic sensors applied to automobiles have been increasing in application fields using magnetic sensors in various fields. In particular, it has already been applied to the brake safety system (ABS) through the detection of the speed and rotation state of the engine rotation of the vehicle and the rotation speed of the wheel. In addition, the electric current monitoring system of the electric system of the vehicle, Application of magnetic sensors has been applied.

Such a magnetic sensor for automobiles has advantages in that it has less malfunction rate and durability and can be made compact and lightweight as compared with optical sensors and detectors using coils due to its operating characteristics. However, due to problems such as temperature range and sensitivity, In particular, there is a possibility that a malfunction may occur when a high-temperature portion such as an engine portion is applied, and it is necessary to confirm whether or not a malfunction has occurred through a test beforehand in an operating environment (vibration condition, temperature condition, etc.) of an actual vehicle.

1. Korean Patent Publication No. 10-2003-0016117

It is an object of the present invention to provide a hall sensor test apparatus which can test the operation performance and the durability by driving the hall sensor in a condition similar to an actual vehicle environment.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to accomplish the above object, a hall sensor testing apparatus of the present invention includes a jig having a hall sensor mounted thereon, the hall sensor being spaced a predetermined distance from at least one target wheel disposed on a coaxial axis, A measurement chamber disposed inside the chamber; A motor driving unit for rotating the shaft on which the at least one target wheel is mounted; An optical sensor disposed on an inner surface of the jig coaxially with a position where the hall sensor is mounted; And an operation unit for comparing the signal measured by the hall sensor and the signal measured by the optical sensor to determine whether the hall sensor is defective or not.

A vibrating plate to which the jig is mounted in the measurement chamber, and a vibrating unit for vibrating the vibrating plate in the Z-axis direction, wherein the jig is detachably attachable to the vibrating plate.

The jig has a trapezoidal shape in which the jig is mounted on the vibrating plate and the length of the other surface is different.

And a separation distance adjusting means for adjusting a separation distance between a position where the target wheel is disposed and a position where the jig is disposed.

The motor driving unit includes a motor, a base panel for fixing the motor to the upper end of the measurement chamber, and a shaft support for supporting the rotation of the shaft.

A light reflection material is coated on any one of teeth formed on the outer diameter portion of the target wheel and the optical sensor measures an optical signal reflected from the reflection material.

Wherein the calculation unit compares the difference between the switching angle of the optical signal and the edge switching angle of the signal measured by the hall sensor with a predetermined critical angle and if the difference exceeds the critical angle, Is determined.

And the internal temperature of the measurement chamber is adjusted.

According to the hall sensor testing apparatus of the present invention as described above, the following effects can be obtained.

 It is possible to confirm whether or not the hall sensor is defective by testing the hall sensor in a substantially same environment as the vehicle before mounting the hall sensor on the vehicle.

1 is a structural view illustrating a Hall sensor testing apparatus according to an embodiment of the present invention.
FIG. 2 is an enlarged perspective view of the Hall sensor test apparatus according to the embodiment of the present invention,
3 is a schematic view showing an example of a state in which a jig and a target wheel are arranged in a hall sensor testing apparatus according to an embodiment of the present invention,
4 is a schematic view showing an example of a state in which an optical sensor is disposed inside a jig in a Hall sensor testing apparatus according to an embodiment of the present invention,
5 is a diagram for explaining a method of evaluating performance of a Hall sensor according to signals measured by a calculation unit in a Hall sensor testing apparatus according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. And is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined by the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that " comprises, " or "comprising," as used herein, means the presence or absence of one or more other components, steps, operations, and / Do not exclude the addition.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals refer to like elements throughout. In the drawings, like reference numerals are used to denote like elements, and in the description of the present invention, In the following description, a detailed description of the present invention will be omitted.

FIG. 1 is a structural view illustrating a Hall sensor testing apparatus according to an embodiment of the present invention. FIG. 2 is an enlarged perspective view of a Hall sensor testing apparatus according to an embodiment of the present invention, FIG. 3 is a schematic view showing an example of a state in which a jig and a target wheel are arranged in a Hall sensor testing apparatus according to an embodiment of the present invention, FIG. 4 is a schematic view of a Hall sensor testing apparatus according to an embodiment of the present invention, Fig. 3 is a schematic view showing an example of a state in which the sensor is disposed inside the jig.

1 to 4, the Hall sensor testing apparatus of the present invention includes a measuring chamber 10, a motor driving unit 20, a jig 31, a distance adjusting unit 32, a vibrating plate 41, An excitation unit 42, an operation unit (not shown), and the like.

The measurement chamber 10 is formed in a cylindrical or polygonal tube shape and a jig 31 is mounted in which the vibrating plate 41 and a hall sensor for testing are mounted.

The temperature inside the measurement chamber 10 is adjustable so that the hall sensor (a) disposed therein can be tested in various temperature environments.

At least one target wheel (11) is arranged coaxially in the measurement chamber (10), and the jig (31) is mounted on the vibrating plate (41) by a distance from the target wheel .

The motor driving unit 20 includes a base panel for fixedly supporting the motor 21 against vibrations in the x and y axis directions generated when the motor 21 disposed at the upper portion of the measurement chamber 10 is driven 22 for supporting the shaft 21-1 and a shaft support 23 for supporting the rotation of the shaft 21-1 so as to minimize shaft shaking of the shaft 21-1.

At least one target wheel 11 is coupled to the shaft 21-1 in the axial direction and when the motor 21 is driven to rotate the shaft 21-1, .

On the other hand, the Hall sensor (a) to be tested is attached to the jig 31. The jig 31 is fixed on the at least one target wheel 11, And is mounted on the vibrating plate 41 at a distance.

Here, the distance between the jig 31 and the target wheel 11 should be kept constant for the accuracy of the test. The motor driving unit 20 fixedly supports the movement of the motor 21 in the x and y axis directions through the base panel 22 and the shaft support 23 supports the x, y So that the movement in the axial direction is fixedly supported and the spacing distance can be maintained constant.

2, the distance between the jig 31 and the target wheel 11 can be adjusted by moving the jig 31 in the x- or y-axis direction, Adjust the separation distance.

In addition, the jig 31 may be manufactured in different shapes and structures depending on the types of hall sensors to be tested. For example, as shown in FIGS. 1 to 3, the jig 31 may be formed in a rectangular shape, or may be formed in a trapezoidal shape in which the length of the upper surface is different from that of the lower surface. An example in which the jig 31 is formed in a trapezoidal shape will be described later with reference to FIG.

As shown in FIG. 2, the jig 31 is detachably mountable on the vibrating plate 41, so that various types of Hall sensors can be tested.

The vibrating unit 42 applies vibrations in the z-axis direction to the jig 31 mounted on the vibrating plate 41. [ Accordingly, vibration in the z-axis direction is applied to the hall sensor mounted on the jig 31. In order to keep the jig 31 mounted on the vibrating plate 41 in a continuously applied vibration state It is preferable that the jig 31 has a trapezoidal shape having a length different from that of the other surface to which the jig 31 is attached to the vibrating plate 41. In Fig. 4, the shape of a preferred jig is illustrated by way of example.

As shown in FIG. 4, an optical sensor b is disposed on the inner surface of the jig 31 coaxially with the position where the hall sensor a is mounted. Here, it is preferable that the optical sensors (b) are arranged in the same number as the Hall sensors (a) to be tested.

On the other hand, a plurality of teeth are formed on the outer diameter portion of the target wheel 11, and one of the teeth is coated with a light reflecting material. The optical sensor (b) measures an optical signal reflected from the reflective material by the transmitted light.

The operation unit compares the signal measured by the hall sensor and the signal measured by the optical sensor to determine whether the hall sensor is defective or not. Hereinafter, a process for determining whether or not the hall sensor is defective by comparing the signal measured by the optical sensor with the signal measured by the hall sensor will be described in detail with reference to FIG.

5 is a view for explaining a method of evaluating the performance of a hall sensor according to a signal measured by a calculation unit in a Hall sensor testing apparatus according to an embodiment of the present invention.

5 shows the flow of signals measured by the photosensor, and the graph on the lower side shows the flow of signals measured by the hall sensor.

As described above, the outer diameter portion of the target wheel 11 is formed with a plurality of teeth, and a light reflection material is coated on any one of the plurality of teeth. The target wheel 11 is rotated in accordance with the operation of the motor driving unit 20 and when the tooth coated with the light reflecting material is disposed at a position facing the optical sensor, Lt; / RTI > 5 shows a state in which an optical signal reflected from the reflective material is received from a time point (Fm1) at which a signal is switched from Low to High in a graph to a time point (Fm2) when the signal is switched from High to Low do.

On the other hand, the hall sensor converts the magnetic field change generated in the measurement object into an electrical signal (e.g., voltage, etc.) and outputs it. For example, when there is no magnetic field change in the measurement object, a constant voltage value is output, but when a magnetic field change occurs, switching of the output signal occurs. Therefore, in the graph shown in the lower side of FIG. 5, a magnetic field change occurs primarily at a time point F1 when the output voltage is switched from High to Low, and when the output voltage changes from Low to High at the time point F2, Is a secondary occurrence.

For example, the Hall sensor can measure the magnetic field change caused by the shape change of the measurement object. If the tooth of the target wheel 11 has the same shape, there is no change in the magnetic field measured by the Hall sensor. Therefore, some or any one of the teeth formed on the target wheel 11 may have a different shape from the other teeth. At this time, it is preferable that the above-described light reflecting material is coated on a part or any one of the other shapes. The normal operation of the Hall sensor may be determined by whether the hall sensor detects a change in the magnetic field of the target wheel 11 at a position close to a position where the optical sensor senses the reflected optical signal.

For example, the arithmetic unit may calculate a first switching angle, which is an angle at which the target wheel 11 is rotated until the first switching point of the optical signal, until the first switching point of the signal measured by the hall sensor, 11) is rotated.

op)을 연산한다. The calculating unit may calculate a first difference between the first switching angle and the first edge switching angle

op).

The calculation unit may calculate a second switching angle that is an angle at which the target wheel 11 is rotated until the second switching point of the optical signal, 11) is rotated.

rel)을 연산한다.The calculation unit may calculate a second difference between the second switching angle and the second switching angle

rel).

op)을 기 설정된 임계각도와 비교하고, 비교결과, 상기 차분이 상기 임계각도를 초과하면 상기 홀센서를 불량으로 판정한다.Specifically, the arithmetic unit calculates a first switching angle, which is an angle at which the target wheel 11 is rotated from a low to a high switching point (Fm1) of the optical signal, and a second switching angle, Of the first edge switching angle (i.e., the angle at which the target wheel 11 rotates)

op) with a predetermined critical angle, and determines that the hall sensor is defective when the difference exceeds the critical angle.

rel)을 기 설정된 임계각도와 비교하고, 비교결과, 상기 차분이 상기 임계각도를 초과하면 상기 홀센서를 불량으로 판정한다.In addition, the operation unit may be configured to switch between a second switching angle, which is an angle at which the target wheel 11 is rotated from a high-to-low switching point Fm2 of the optical signal, to a low- The second difference of the second edge switching angle (i.e., the angle at which the target wheel 11 rotates until the time point F2)

rel is compared with a predetermined critical angle, and if the difference exceeds the critical angle as a result of the comparison, it is determined that the hall sensor is defective.

At this time, when the calculated difference of any one of the first difference and the second difference exceeds a predetermined critical angle, it is possible to determine that the hall sensor is defective, and as another example, the first difference and the second difference When all of the differences exceed the predetermined critical angle, it is possible to judge that the hall sensor is defective.

With this configuration, it is possible to test whether or not the hall sensor is defective under circumstances where the hall sensor is actually mounted on the vehicle.

The present invention constructed as above operates as follows.

First, the hall sensor to be tested is mounted on the jig 31 and mounted on the plate 41 having the hall sensor.

Then, the excitation unit 42 is operated to apply vibration to the hall sensor mounted on the jig 31.

Then, the motor driving unit 20 is operated to rotate the target wheel, and the hall sensor and the signal measured by the optical sensor are collected in a state where vibration is applied to the hall sensor.

The operation unit compares the signal measured by the hall sensor and the signal measured by the optical sensor to determine whether or not the hall sensor is defective.

At this time, it is possible to test whether the hall sensor is defective even in various temperature environments by adjusting the internal temperature of the measurement chamber 10.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the scope of the claims and their equivalents shall be construed as being included within the scope of the present invention.

Claims (8)

A measurement chamber disposed at a distance from the at least one target wheel disposed on a coaxial axis with a predetermined distance therebetween, the jig having a hole sensor mounted thereon; A motor driving unit for rotating the shaft on which the at least one target wheel is mounted; An optical sensor disposed on an inner surface of the jig coaxially with a position where the hall sensor is mounted; And an operation unit for comparing the signal measured by the hall sensor and the optical signal measured by the optical sensor to determine whether the hall sensor is defective,
An oscillating plate on which the jig is mounted in the measurement chamber,
Further comprising: a vibrating unit for vibrating the vibrating plate in the Z-axis direction, wherein the jig is removably attachable to the vibrating plate.
delete The method according to claim 1,
Wherein the jig has a trapezoidal shape in which the jig is mounted on the vibrating plate and the length of the other surface is different.
The method according to claim 1,
Further comprising a separation distance adjusting means for adjusting a separation distance between a position where the target wheel is disposed and a position where the jig is disposed.
The method according to claim 1,
The motor drive unit includes:
A motor, a base panel for fixing the motor to the upper end of the measurement chamber, and a shaft support for supporting the rotation of the shaft.
The method according to claim 1,
Wherein a light reflection material is coated on one of teeth formed on an outer diameter portion of the target wheel and the light sensor measures an optical signal reflected from the reflection material. Test device.
The method according to claim 1,
The operation unit,
To said first switching time of the optical signal to a first switch timing of the target wheels are computed for the angle of a first switching angle of rotation, and that the hall sensor corresponding to the first switching time of the optical signal measured signal Calculating a first difference between the first switching angle and the first edge switching angle, and calculating a first difference between the first switching angle and the first edge switching angle,
And determines that the hall sensor is defective when the first difference exceeds a predetermined critical angle.
The method according to claim 1,
Wherein an internal temperature of the measurement chamber is adjusted.

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