KR20160027462A - Apparatus for inspecting the quality of magnetization on a magnet specimen and method for inspecting the quality of magnetization on a magnet specimen with the same - Google Patents

Abstract

The present invention relates to an apparatus to inspect a magnetization quality of a magnet. The apparatus to inspect the magnetization quality of the magnet comprises: stage units (2, 4) equipped with an operable stage plate (4) and a stage base (2) to mount the magnetized target magnet to be inspected; sensing probes (3, 5, 6, 7, 50) including a magnetic field sensor (50) to inspect a magnetic field of the target magnet to be inspected, arranged on the stage plate (4); and a control unit (20) to determine the magnetization state of the target magnet to be inspected, by comparing a magnetic field output reference value stored in a storage unit with a magnetic field signal inspected from the magnetic field sensor (50). Provided are an apparatus to inspect the magnetization quality of the magnet; and a method to inspect the magnetization quality of the magnet. The apparatus is capable of reducing production costs, and securing reliability of detection by securing a uniformity of the magnetized magnet.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetism detection device and a magnetism detection method for detecting magnetism of a magnet,

The present invention relates to an apparatus and method for detecting magnetism of a magnet.

In general, as the steering wheel is rotated when the vehicle is running or stopped, the wheel in contact with the road surface also rotates. That is, when the steering wheel is rotated leftward or rightward, the wheel rotates in the same direction. Since the wheel is in contact with the road surface, the steering ratio between the steering steering wheel and the wheel is different from each other due to the friction between the wheel and the road surface, so that the driver needs a large force to operate the steering steering wheel. .

A power steering system (PS) is provided as a device for assisting the steering force, and an EPS system using an electric motor among power steering systems is expanding its application range in passenger vehicles used in real life.

In order to assist the power assist in such a power steering system, a torque sensor for measuring the rotational angle deviation between the input shaft side connected to the steering steering wheel and the output shaft side interlocked with the wheel side Respectively.

The torque sensor is largely classified into a contact type and a non-contact type. Recently, a non-contact type torque sensor is adopted as a contact type due to a problem of reduction in noise and durability. The non-contact type torque sensor is classified into a magnetoresistance detection method, a magnetostriction detection method, a capacitance detection method, and an optical detection method.

In particular, in the case of a non-contact type torque sensor, a magnet ring is disposed, which is manufactured by magnetizing a predetermined metal material. However, in the case of the magnet ring, it is difficult to detect the faulty state of the differential.

The uniformity of the magnetic path from the magnet ring must be maintained to ensure the sensitivity reliability of the sensor and the like. The uniformity of the magnetic path of the magnet ring is an important factor in the magnetizing process of the magnet ring.

However, in the case of the magnetizing apparatus according to the related art, there is a difficulty in securing the uniformity and the increase in the process cost, such as the verification of whether the magnetization is normal or complicated by manual operation.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems described above, and it is an object of the present invention to provide a magnet, which can detect the magnetization state with a simple structure and reduce the manufacturing cost and secure the sensing reliability in application of the magnetic field sensing structure by securing uniformity of magnetized magnet And to provide a method for manufacturing the same.

In order to achieve the above object, the magnetism detection device of the present invention is an apparatus for detecting the magnetization quality of a magnet. The magnetism detection device comprises a stage base (2) (3, 5, 6, 7, 50) including a magnetic field sensor (50) for detecting a magnetic field of a magnet to be detected disposed on the stage plate (4) And a control unit (20) for comparing the magnetic field signal detected from the magnetic field sensor (50) with a magnetic field output reference value stored in the storage unit to determine the magnetization state of the magnet to be detected.

In the magnet magnetization quality measuring apparatus of the present invention, the stage plate may be rotatable relative to the sensing probe.

Wherein the magnetic field sensor (50) is an Hall sensor, and the sensing probe comprises: a magnetic field sensor tool kit (7) on which the magnetic field sensor (50) is mounted; And a probe base 3 having an arm hinge drive unit 6 for rotating and supporting the other end of the probe arm 5 at one end.

The apparatus for detecting magnetism quality may further comprise a chamber (8) for accommodating the stage unit and the sensing probe and for blocking an external environmental influence.

The apparatus for detecting magnetism quality may further include a heat source unit 70 disposed inside the chamber and performing heat transfer with the magnet to be detected and operated by the control unit.

According to another aspect of the present invention, there is provided a stage unit including a stage unit (2, 4) having a stage base (2) and a movable stage plate (4) (3, 5, 6, 7, 50) including a magnetic field sensor (50) for detecting a magnetic field of a magnet to be detected disposed in the magnetic field sensor (50) And a control unit (20) for comparing the magnetic field output reference data with the magnetic field output reference data to determine a magnetized state of the magnet to be detected, and a step (S1) of initializing the magnetic field sensor And a control unit for controlling the magnetic field sensor based on a detection control signal from the control unit, A first calculation step of calculating a rotation angle signal through a magnet to be detected based on a magnetic field signal detected in the detection step; (S40) of determining whether the rotation angle signal is normal based on the magnetic field output reference data stored in the storage unit, and a first determination step (S40) of determining whether the rotation angle signal is normal based on the magnetic field output reference data stored in the storage unit. A second determination step of comparing a reference magnetic field strength as a magnetic field output reference data with a reference value and comparing a reference magnetic field intensity with a reference magnetic field strength; And a determination output step (S60) of outputting the magnetism detection result.

In the magnet magnetization quality measuring method, the second determining step (S50) may include: a magnetic field strength calculating step (S51) of confirming and calculating the detected magnetic field intensity through the detection control signal of the magnetic field sensor; S51) and a magnetic flux density comparing step (S53, S55, S57) for comparing the reference magnetic field strength as the magnetic field output reference data.

The magnet magnetization quality testing apparatus and magnet magnetization quality testing method according to the present invention having the above-described configuration have the following effects.

First, the magnet magnetization quality testing apparatus and the magnet magnetization quality testing method of the present invention can enable quick and accurate detection of the magnetization state using a simple magnetic field sensor.

Second, the magnet magnetization quality testing apparatus and the magnet magnetization quality testing method of the present invention can rapidly and precisely detect the magnetization state using a simple magnetic field sensor, thereby significantly reducing the manufacturing cost and the process cost.

Third, the magnet magnetization quality testing apparatus and the magnet magnetization quality testing method of the present invention can increase the reliability of detection by making it possible to grasp the non-uniform magnetization detection on the circumference and the magnetization center non-uniformity.

1 is a schematic exploded perspective view of a magnet magnetization quality measuring apparatus according to an embodiment of the present invention.
2 is a schematic exploded perspective view of a torque sensor device as an example in which a magnet to be detected by a magnet magnetization quality measuring apparatus according to an embodiment of the present invention is implemented.
3 is a schematic exploded perspective view of a magnet unit of a torque sensor device as an example in which a magnet to be detected by a magnet magnetization quality measuring apparatus according to an embodiment of the present invention is implemented.
FIGS. 4 to 6 are diagrams showing the magnetization patterns of the magnet rings as the magnets to be detected and the angular profiles and the magnetic field strength profile diagrams of the magnet magnetization quality measuring apparatus 1 through the magnetic field sensors 50. FIG.
FIG. 7 is a schematic flowchart of a magnet magnetization quality measuring method according to another embodiment of the present invention.
FIGS. 8 and 9 are BH diagrams and magnetic field intensity output diagrams of a magnet showing a magnetic field change according to an environmental change. FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus 10 for detecting magnetism quality of the present invention and a method of detecting the same will be described with reference to the accompanying drawings.

Fig. 1 shows an apparatus 1 for detecting the magnetization quality of a magnet according to an embodiment of the present invention. The magnetism detection device 1 includes a stage unit 2, 4, sensing probes 3, 5, 6, 7, 50 and a control unit 20, A storage unit 30 and an operation unit 40. The storage unit 30 may be connected to the storage unit 30, The storage unit 30 may store the preset data. The preset data may be used for determining whether the magnetization is normal by the control unit 20 or the like. And whether or not a predetermined operation is required during the determination process of whether or not it is normal.

In some cases, the output unit 60 may be further provided to output the magnetization result of the magnet on the display or may be output to an external storage device or the like.

The stage units (2, 4) are provided with a stage base (2) on which the magnets to be magnetized are mounted and the movable stage plate (4) is movable. The sensing probes The control unit 20 compares a magnetic field signal detected from the magnetic field sensor 50 with a magnetic field output reference value stored in the storage unit to detect the magnetic field of the magnet And determines the magnetization state of the target magnet.

The stage units 2 and 4 of the magnetism measuring apparatus 1 include a stage base 2 and a stage plate 4. The stage base 2 is provided with a stage plate 4 on one surface, Thereby supporting the plate 4. On one surface of the stage plate 4, a magnet ring 2210 to be detected is arranged.

Although not shown in this embodiment, the stage plate 4 may further include a fixed rib or the like for fixing the magnet ring 2210 on one surface thereof. The stage plate 4 on which the magnet ring 2210 is disposed can be rotated in a predetermined direction and the stage plate 4 is provided with a stage plate driving section 22a for generating a rotating driving force for rotating the stage plate 4, (Not shown) may be provided.

In some cases, the magnetism measuring apparatus 1 may be arranged to be accommodated in a separate chamber 8. The chamber 8 can be prevented from being influenced by the external environment. In the chamber 8, unnecessary exposure is prevented from being caused to the object magnet to be detected by the external environment cutoff, thereby enabling a more accurate magnetization state check.

The chamber 8 may further include a heat source unit 70, which can change the internal environment of the chamber 8. The heat source unit 70 is connected to the control unit 20 and operates according to a heat source control signal of the control unit 20 to operate as a high temperature heat source to heat the internal environment in which the magnet rings 220 and 2210, Or the heat source unit 70 may be operated by a low temperature heat source to absorb the heat of the internal environment and discharge the heat to the outside so that the magnet ring 220 is exposed to the low temperature environment, And the like to check the strength of the magnetic field so as to faithfully perform a predetermined sensing function even when the various devices equipped with the magnet ring as the magnet to be detected, for example, the torque sensor device are mounted on the vehicle and are exposed to the external cryogenic temperature environment Whether or not it can be kept within a permissible range, and the like. 8 and 9 are a diagram showing a potato phenomenon according to a temperature change of a magnet to be detected and a potato output state due to a change in temperature and temperature. 8 shows the BH diagram of the magnet. As the temperature changes on the load line, the operating point OP1 at the temperature T1 is shifted to the other operating point OP2 for the temperature T2 (T2 <T1) As shown in FIG. 9, in the case of low temperature change, a demagnetization phenomenon in which the maximum value is lowered can be confirmed. Through the configuration of the chamber 8 and the heat source unit 70, it is possible to check whether the increase or the decrease of the magnetization phenomenon occurs due to the change of the environment of the magnet to be detected, and to check whether the allowable reference value is exceeded or permissible.

Sensing probes 3, 5, 6, 7 and 50 are provided in the vicinity of the stage plate 4. Sensing probes 3, 5, 6, 7 and 50 are disposed on the stage plate 4, Magnetic field sensor tool kit 7, probe arm 5, and probe base 3, as well as magnetic field sensor 50 for detecting the magnetic field of magnetic field sensor 220 (2210).

The magnetic field sensor 50 is embodied as a hall sensor in this embodiment. The magnetic field sensor 50 may be implemented as an anisotropic magnetoresistive sensor or the like as the case may be. However, the magnetic field sensor 50 may detect the change state when the magnetized magnet is exposed to various environments, It is preferable that the Hall sensor exhibits robustness against the exposure environment of heat.

The magnetic field sensor tool 50 can be connected via the magnetic field sensor tool kit 7 and the magnetic field sensor tool kit 7 can be positioned and fixed to one end of the probe arm 5, It is possible to actively cope with a change in the size of the magnet to be detected, which is disposed on the stage plate 4, so that it is possible to smoothly adjust the position of the magnetic field sensor under various inspection environments.

The other end of the probe arm 5 is connected to the probe base 3. The arm hinge drive unit 6 is provided between the probe arm 50 and the probe base 3 to enable a predetermined position adjustment. The hinge driving unit 6 may be realized by a predetermined motor that rotates the probe arm 5. In some cases, the arm hinge driving unit 6 may be formed as a simple hinge shaft without a motor as a separate driving element have.

A stage plate 4 is disposed in the vicinity of the probe arm where the magnetic field sensor 50 is disposed and a magnet ring 2210 serving as a magnet to be detected is disposed on one surface of the stage plate 4, The magnetic field sensor 50 can be brought close to the magnet side by the positional variation of the arm and the stage plate 4 can be rotated to detect the intensity of the magnetic field or the biased magnetization from the magnet to be detected according to the predetermined rotation angle.

The magnet to be detected by the magnet magnetization quality measuring apparatus of the present invention can be realized as a magnet ring of the magnet unit of the torque sensor device. FIG. 2 shows a torque sensor device as an example in which a magnet to be detected by the magnet magnetization quality measuring apparatus 1 according to an embodiment of the present invention is provided. 2, the torque sensor device 10 includes a housing 100, a magnet unit 200, a collector unit 300, a sensing unit 400, and a shield ring unit 500. The torque sensor device 10 includes a housing 100, a magnet unit 200, The torque sensor device 10 according to the present invention is disposed between the input shaft 2 and the output shaft 3 and rotatably supported by the input shaft 2 and the output shaft 3 through the relative rotational displacement of the input shaft 2 and the output shaft 3, And senses a torque between the output shaft 3 and the output shaft 3.

The housing 100 accommodates the end portions of the input shaft 2 and the output shaft 3 and is positionally fixed and movable relative to the input shaft 2 and the output shaft 3.

The magnet unit 200 includes a magnet ring 220 housed in the housing 100 and connected to one end of the input shaft 2 and accommodated in the housing 100 so as to be rotatable within the housing 100 .

The collector unit 300 is fixed to the housing 100 and disposed on the outer side of the magnet unit 200 to focus the magnetic field of the magnet unit 200.

The sensing unit 400 includes a torque sensor 410 disposed on the outer circumferential side of the collector unit 300 and sensing a magnetic field to be focused through the collector unit 300.

The shield ring unit 500 is disposed between the collector unit 300 and the magnet unit 200 and is connected to one end of the output shaft 3 so that the magnetic field of the magnet unit 200 converged through the collector unit 300 is And is changed by relative rotation between the input shaft 2 and the output shaft 3.

More specifically, the housing 100 includes a housing cover 110 and a housing base 120. The housing cover 110 is fastened to the housing base 120 to form an interior space for receiving other components.

The housing cover 110 is disposed on the input shaft side and the housing base 120 is disposed on the output shaft 3 side facing the housing cover 110.

A housing cover mounting portion is provided on the outer periphery of the housing cover 110, and a housing base mounting portion is disposed on the outer periphery of the housing base 120 to form a structure in which the housing base mounting portions are engaged with each other.

The housing cover 110 and the housing base 120 are provided with a housing cover through hole and a housing base through hole respectively at the center to directly connect the input shaft 2 and the output shaft 3 and the input shaft 2 and the output shaft 3 Thereby enabling the torsion bar 5 to be disposed in the through-hole.

Other components are disposed in the inner space formed by the housing cover 110 and the housing base 120. At least a part of the magnet unit 20 is disposed in the inner space formed by the housing cover and the housing base.

2) is accommodated in the housing 100 and connected to one end of the input shaft 2 to be housed in the housing 100 so as to be rotatable inside the housing 100. The magnet unit 200 The magnet unit 200 includes a magnet holder 210, a magnet ring 220 and a magnet cover 230 and may further include a magnet buffer unit 240 as occasion demands. You may.

One end of the magnet holder 210 is connected to the input shaft 2 side and the magnet ring 220 is spaced apart from the magnet holder 210 with the magnet holder 210 interposed therebetween. The magnet cover 230 is disposed between the magnet holder 210 and the magnet holder 210 The magnet buffer 220 is disposed between the magnet cover 230 and the magnet ring 220 so that the magnet cover 220 and the magnet ring 220 are disposed to be connected to the magnet holder 210. The magnet buffer 220 is disposed between the magnet cover 220 and the magnet cover 220, 220).

The magnet holder 210 includes a magnet holder shaft 2110 and a magnet holder base 2120. One end of the magnet holder shaft 2110 is connected to the input shaft 2, and at least a portion of the magnet holder shaft 2110 connected to the input shaft 2 side has a cylindrical structure. The magnet holder base 2120 is disposed at the other end of the magnet holder shaft 2110 and the magnet rings 220 are disposed on both sides.

The magnet ring 220 is formed of a ring type magnet. In the present embodiment, the magnet ring 220 is formed by multipolar magnetization in the circumferential direction, for example, in the order of N, S, N, S, Are formed of magnets of alternating arrangement. In the present embodiment, the magnet ring 220 includes a magnet upper ring 2210 and a magnet lowering ring 2220. The magnet ring 220 may have the same structure as that of the magnet ring 220, Modification is possible.

The magnet upper ring 2210 and the magnet lowering ring 2220 each include a magnet upper ring body 2211 and a magnet lowering body 2221. The magnet upper ring body 2211 is disposed in the direction of the input shaft, The ring body 2221 is disposed in the direction of the output shaft.

Magnet ring body pits 2213 and 2223 are disposed on the inner circumferential surface of the magnet ring 220. The magnet upper ring 2210 and the magnet lower ring 2220 are provided with magnet upper ring body pits 2213, (2223). The magnet upper ring and the magnet lowering may be made identical to each other and mounted upside down to take up the respective upper / lower structure. The magnet upper ring body pit 2213 and the magnet lowering body pit 2223 are disposed on one side of the end portion of the inner circumferential surface of each magnet ring. Such a structure prevents unnecessary material waste, minimizes unnecessary fluctuations in magnetic flux, It is possible to adopt a structure that minimizes interference with other components when the magnet ring is mounted on the input shaft and the output shaft on the same element.

The magnet upper ring body pit and the magnet lowering body pit may be formed in a groove structure. However, in this embodiment, the magnet upper ring body pit may be formed in a protruding structure and may have various configurations in the range of engaging between the magnet ring and the magnet holder.

The magnet cover 230 is formed so that a magnet ring 220 is disposed between the magnet holder 210 and the magnet holder 210. The magnet cover 230 includes a magnet upper cover 2310 and a magnet lower cover 2320).

The magnet upper cover 2310 is disposed on the input shaft 2 side and the magnet lower cover 2320 is disposed on the output shaft 3 side while the magnet upper cover 2310 is disposed on the input shaft 2 side of the magnet holder 210 And the magnet lower cover 2320 is fastened to one surface of the magnet holder 210 facing the output shaft 3.

As described above, the magnet rings 220 (2210 and 2220) provided in the torque sensor device are required to realize an accurate magnetized state in which the centers of the magnet rings are uniform and the detection reliability of the torque sensor device and the like provided with the magnet ring can be secured.

FIGS. 4 to 6 show magnetization patterns of the magnet rings as magnetometers to be detected, and thus the angular profiles and the magnetic field intensity profiles of the magnet magnetization quality measuring apparatus 1 through the magnetic field sensors 50. FIG.

Fig. 4 shows the magnetization state (a), the angular profile b and the magnetic field intensity profile c for the magnet ring in the ideal case. First, in the ideal case of the magnet ring, the N pole and the S pole are equally divided at an angle of 2? / N. Where n represents the total number of pulses. In this case, the angle profile obtained according to the rotation of the magnet ring exhibits a stable sinusoidal shape and is outputted, and even when the magnetic field intensity is applied, the structure has a uniform maximum value and minimum value relative to the relative rotation of the magnet ring.

5 and 6 show a case where the magnetization is in a defective state. First, FIG. 5 shows a state in which the magnetization centers on the circumference of the magnet ring are unequal The angular profile is output from the normal sinusoidal output with a certain error state and is output. Even in the case of the magnetic field strength, the maximum value and the minimum value are not constant but relative to the relative rotation of the magnet ring. .

Fig. 6 shows a structure in which the magnetization centers are different from each other with respect to the N poles and the S poles magnetized, and the magnetization centers are different from each other, and in some cases, the magnetization length on the circumference of the magnet ring is unequal The maximum value and the minimum value are not constant and fluctuate relative to the relative rotation of the magnet ring even in the case of the intensity of the magnetic field and the output The waveform is changed to be close to the shape of a square wave and output.

A detection method using the apparatus for detecting magnetism quality of the present invention is described as follows.

First, a providing step S1 is performed in which a magnet magnetization quality measuring apparatus 1 for detecting the quality of a magnet is provided. In order to avoid redundant explanations, the concrete configuration of the magnet magnetism quality testing apparatus 1 is replaced with the above do.

After the magnetism detection device 1 is provided, the control section 20 executes the initialization step S10. In the initialization step S10, the control unit 20 initializes the magnetic field sensor 50 to check the initial data of the initial state output from the magnetic field sensor 50. [ That is, the control unit 20 confirms the initial output curve of the magnetic field sensor 5 implemented by the Hall IC and uses the preset data stored in the storage unit 30 and including the initial correction data of the magnetic field sensor 50 The output value from the magnetic field sensor 5 can be corrected and the reference value adjustment such as the zero point adjustment can be executed.

Then, after the initialization step S10 is executed, the control unit 20 places the magnet ring 2210, which is the magnet to be detected, on the stage plate 4 and executes a predetermined detection process. The transfer of the magnet ring to the stage plate can also be carried out automatically through an automatic facility.

The intensity of the magnetic field generated by the magnet ring 2210 through the magnetic field sensor 50 connected to the probe arm 5 side in accordance with the control signal of the control unit 20, And the like. At this time, the magnetic field sensor implemented by the Hall IC can sense the magnitude of the magnetic field in three axial directions, that is, the X-Y-Z axial direction, by using the three-axis sensing structure.

Thereafter, the control unit 20 performs a first arithmetic operation (step S13) of calculating a rotation angle (Ang, sens) sensed by the magnetic field sensor using the signal output from the magnetic field sensor 50 and the preset data of the storage unit 30 S30).

The difference between the actual rotation angle (Ang, real) between the magnet ring 2210 and the magnetic field sensor 50, that is, the rotation angle difference DELTA Ang can be calculated physically in the first calculation step S0, , The control unit 20 compares the rotation angle difference? Ang obtained in the first calculation step S30 with the rotation angle tolerance? Ang, s included in the preset data stored in the storage unit 30 .

When the rotation angle difference DELTA Ang is equal to or greater than the rotation angle tolerance DELTA Ang, s, the control unit proceeds to the control flow to step S63. On the other hand, if the rotation angle difference DELTA Ang is less than the rotation angle tolerance DELTA Ang, s, the control unit proceeds to step S50.

In the second determination step (S50), the control unit 20 confirms the detected magnetic field intensity through the detection control signal of the magnetic field sensor 50 and compares the reference magnetic field intensity as the magnetic field output reference data. That is, the second determination step S50 includes the magnetic field strength calculation step S51 and the magnetic flux density comparison steps S53, S55, and S57,

In the magnetic field strength calculation step S51, the control unit 20 confirms and calculates the detection magnetic field strength detected by the magnetic field sensor 50 through the detection control signal for the magnetic field sensor 50. The magnetic field sensor 50 Outputs individually the voltage value generated by the magnetic induction by the magnetic field of the magnet ring with respect to each X, Y, and Z axis directions, and outputs the magnetic field intensity corresponding to the induced voltage together with the preset data stored in the storage unit 30. [

The controller 20 then compares the magnetic field strength values Bx, By, Bz for each axis obtained in the magnetic field strength calculation step S51 with the reference magnetic field strength values Bx, Compare with the strengths (Bxi, Bxy, Bxz).

That is, the control unit 20 causes the operation unit 40 to calculate the magnetic field intensity values Bx, By, and Bz for the respective axes and the reference magnetic field strengths Bxi, Bxy, and Bxz obtained in the magnetic field strength calculation step S51, To calculate the magnetic field errors (DELTA Bx, DELTA By, DELTA Bz). Then, the control unit 20 compares the preset reference magnetic field errors (DELTA Bxs, DELTA Bys, DELTA Bzs) included in the preset data of the storage unit 30 to perform individual comparison steps (S53, S55, and S57) do.

After the individual comparison step, the control flow advances to step S61 or S63 in accordance with the comparison result, and a decision output step S60 is performed to output a predetermined comparison result.

In the decision output step S60, when the magnetic field errors (DELTA Bx, DELTA By, DELTA Bz) for each axis are smaller than predetermined reference magnetic field errors DELTA Bxs, DELTA Bys, DELTA Bzs (S61) so that it is possible to confirm that the magnetization of the magnet ring is in the normal magnetization state within the tolerance range.

On the other hand, in the decision output step S60, the controller 20 determines whether any one of the magnetic field errors (DELTA Bx, DELTA By, DELTA Bz) for each axis in each step is equal to or smaller than a predetermined reference magnetic field error DELTA Bxs, DELTA Bys, Bzs, or if it is determined in step S41 that the rotation angle difference DELTA Ang is greater than or equal to the rotation angle tolerance DELTA Ang, s, it is output in a defective output state (S63) and the magnetized ring It is possible to confirm that the defective magnetism state is out of the tolerance range.

As described above, an embodiment of the present invention has been described with respect to a magnet ring included in an automotive torque sensor device. However, the present invention can be applied and implemented variously in a range of detecting uniformity of a magnetized state of a magnet, This is possible.

1 ... Magnet sputtering quality inspection system
2 ... stage base 4 ... stage plate
5 ... Probe arm 6 ... Arm hinge drive
7 ... magnetic field sensor tool kit 20 ... control section
30 ... storage unit 40 ... operation unit
50 ... magnetic field sensor 60 ... output section

Claims (7)

An apparatus for detecting the magnetization quality of a magnet,
A stage unit (2, 4) having a stage base (2) on which a movable stage plate (4) on which a magnetized magnet to be magnetized is placed,
A sensing probe (3, 5, 6, 7, 50) including a magnetic field sensor (50) for detecting a magnetic field of a magnet to be detected disposed on the stage plate (4)
And a control unit (20) for comparing the magnetic field signal detected from the magnetic field sensor (50) with a magnetic field output reference value stored in the storage unit to determine the magnetization state of the magnet to be detected. The method according to claim 1,
Wherein the stage plate is relatively rotatable with respect to the sensing probe. The method according to claim 1,
The magnetic field sensor 50 is a hall sensor,
The sensing probe includes:
A magnetic field sensor tool kit 7 on which the magnetic field sensor 50 is mounted,
A probe arm 5 to which the magnetic field sensor tool kit 7 is fixed and rotatable at one end,
And a probe base (3) having an arm hinge drive part (6) for rotatably supporting the other end of the probe arm (5) at one end. 3. The method of claim 2,
Further comprising a chamber (8) accommodating the stage unit and the sensing probe and shielding the external environmental influence. 5. The method of claim 4,
Further comprising a heat source unit (70) disposed inside the chamber to heat-transfer the target magnet and to be operated by the control unit. A stage unit (2, 4) having a movable stage plate (4) holding a magnetized object magnet to be magnetized and a stage base (2) mounted thereon, and a magnetic field detecting unit (3, 5, 6, 7, 50) including a magnetic field sensor (50), magnetic field output reference data stored in a storage unit and a magnetic field signal detected from the magnetic field sensor (50) And a control unit (20) for determining a magnetizing state of the magnet for magnetizing the magnet,
An initialization step (S10) of initializing the magnetic field sensor to check initial data,
A detecting step (S20) of detecting the magnetizing state of the magnet to be detected through the relative rotation of the magnetic field sensor with the magnet to be detected according to the detection control signal of the controller,
A first calculating step of calculating a rotation angle signal through the magnet to be detected based on the magnetic field signal detected in the detecting step;
A first determination step (S40) of determining whether the rotation angle signal is normal based on the rotation angle signal calculated in the first calculation step and the magnetic field output reference data stored in the storage,
A second determination step (S50) of checking the detected magnetic field intensity through the detection control signal of the magnetic field sensor and comparing the detected magnetic field strength and the reference magnetic field intensity as the magnetic field output reference data,
And a determination output step (S60) of outputting whether or not the normal magnetization of the magnet for detection is outputted according to the determination result of the first determination step (S40) and the second determination step (S50) . The method according to claim 6,
The second determination step (S50) includes:
A magnetic field intensity calculation step (S51) of confirming and calculating the detected magnetic field intensity through the detection control signal of the magnetic field sensor,
(S53, S55, S57) for comparing the detected magnetic field strength calculated in the magnetic field strength calculation step (S51) with the reference magnetic field strength as the magnetic field output reference data .

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