CN113720530A - Hard disk troubleshooting method and hard disk troubleshooting device - Google Patents
Hard disk troubleshooting method and hard disk troubleshooting device Download PDFInfo
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- CN113720530A CN113720530A CN202110929351.0A CN202110929351A CN113720530A CN 113720530 A CN113720530 A CN 113720530A CN 202110929351 A CN202110929351 A CN 202110929351A CN 113720530 A CN113720530 A CN 113720530A
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- hard disk
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- centrifugal force
- offset
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- 238000013024 troubleshooting Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000001133 acceleration Effects 0.000 claims abstract description 96
- 230000000694 effects Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 7
- 238000009413 insulation Methods 0.000 description 6
- 230000035939 shock Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining unbalance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
Abstract
The invention discloses a hard disk failure troubleshooting method, which comprises the steps of respectively obtaining X-axis acceleration and Y-axis acceleration of a tested system which is composed of a positioning clamp and a hard disk through an acceleration sensor, calculating resultant acceleration to obtain the integral acceleration condition of the whole tested system, calculating the centrifugal force of the tested system according to the resultant acceleration to obtain the centrifugal force generated by the whole tested system due to eccentricity, finally calculating offset by the centrifugal force, obtaining the dynamic balance state of the hard disk according to the offset, judging whether the offset exceeds a set range or not, and determining that the hard disk causes failure due to unbalance if the offset exceeds the set range. The invention also provides a hard disk troubleshooting device, which can realize the same technical effect by using the measuring method.
Description
Technical Field
The invention relates to the field of hard disk detection, in particular to a hard disk troubleshooting method and a hard disk troubleshooting device.
Background
When any rotor rotates around a shaft center, centrifugal force is generated due to uneven mass distribution relative to the shaft axis, and the unbalanced centrifugal force acts on a rotor bearing to cause vibration, generate noise and accelerate bearing wear, so that the performance and the service life of a product are influenced.
During the working process of an HDD (Hard Disk Drive), an RRO (repeatable runout) parameter is abnormal during a high-speed operation of a SPM (Spindle Motor) due to unbalanced mounting of a rotor, so that a PES (Position Error Signal) is large; the magnetic head cannot accurately write data to a designated track due to inaccurate track seeking, and the read-write access performance of the hard disk is reduced.
Usually, a hard disk production line measures, compensates and corrects the unbalance amount of a motor rotor at an imbalance station before a top cover is installed on a hard disk. During use, hard disks fail due to vibration or wear factors from unbalanced centrifugal forces acting on the motor rotor bearings.
Failure analysis root causes that the abnormality of the RRO is usually found to be derived from the unbalance of the SPM many times, and the failure verification needs to be returned to the production line for measuring the imbalance rework, which is undoubtedly a great cost for expensive clean room production line resources.
For those skilled in the art, how to measure whether the hard disk fails due to unbalance offline and improve the judgment efficiency is a technical problem to be solved at present.
Disclosure of Invention
The invention provides a hard disk troubleshooting method and a hard disk troubleshooting device, which can judge whether a hard disk fails due to unbalance, improve the judgment efficiency, and have the following specific scheme:
a hard disk troubleshooting method comprises the following steps:
respectively acquiring the X-axis acceleration and the Y-axis acceleration of a tested system which is jointly composed of a positioning clamp and a hard disk through an acceleration sensor;
calculating resultant acceleration according to the X-axis acceleration and the Y-axis acceleration;
calculating the centrifugal force of the system to be measured according to the resultant acceleration;
calculating an offset from the measured system centrifugal force;
and judging whether the offset exceeds a set range, and if so, determining that the hard disk fails due to unbalance.
Optionally, the centrifugal force of the system under test is calculated using the following formula:
F＝M*a
wherein: f is the centrifugal force of the system to be measured, M is the mass of the system to be measured, and a is the resultant acceleration.
Optionally, the offset is calculated using the following formula:
m*e＝F/(ω^2)＝M*a/(ω^2)
wherein: m × e is the offset, m is the eccentric mass, e is the eccentricity, and ω is the rotational speed.
The invention also provides a hard disk troubleshooting device, which comprises a positioning clamp, a control module and an acceleration sensor, wherein the positioning clamp is used for clamping and fixing the detected equipment, the acceleration sensor is used for detecting the acceleration of a detected system which is composed of the positioning clamp and the hard disk, the control module is used for receiving the X-axis acceleration and the Y-axis acceleration which are detected by the acceleration sensor, and calculating the resultant acceleration according to the X-axis acceleration and the Y-axis acceleration; calculating the centrifugal force of the system to be measured according to the resultant acceleration; calculating an offset from the measured system centrifugal force; the control module can judge whether the offset exceeds a set range, so that whether the hard disk fails due to unbalance is determined.
Optionally, the positioning fixture further comprises a supporting base, wherein a rubber shock insulation block is arranged on the upper surface of the supporting base and used for supporting the positioning fixture.
Optionally, a grounding wire is arranged at a signal connection position of the acceleration sensor and the positioning clamp.
Optionally, the acceleration sensor is a three-axis acceleration sensor.
Optionally, the control module includes a data acquisition card, and the data acquisition card is connected to the acceleration sensor through a signal line and respectively acquires acceleration data in the directions of an X axis, a Y axis, and a Z axis.
The invention provides a hard disk failure troubleshooting method, which comprises the steps of respectively obtaining X-axis acceleration and Y-axis acceleration of a tested system which is composed of a positioning clamp and a hard disk through an acceleration sensor, calculating resultant acceleration to obtain the integral acceleration condition of the whole tested system, calculating the centrifugal force of the tested system according to the resultant acceleration to obtain the centrifugal force generated by the whole tested system due to eccentricity, finally calculating offset by the centrifugal force, obtaining the dynamic balance state of the hard disk according to the offset, judging whether the offset exceeds a set range or not, and determining that the hard disk causes failure due to unbalance if the offset exceeds the set range. The invention also provides a hard disk troubleshooting device, which can realize the same technical effect by using the measuring method.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a hard disk troubleshooting apparatus of the present invention.
The figure includes:
Detailed Description
The core of the invention is to provide a hard disk fault troubleshooting method and a hard disk fault troubleshooting device, which can judge whether a fault is caused by unbalance and have higher judgment efficiency.
In order to make those skilled in the art better understand the technical solution of the present invention, the hard disk troubleshooting method of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The hard disk fault troubleshooting method comprises the following steps:
s1, respectively acquiring the X-axis acceleration and the Y-axis acceleration of a tested system which is composed of the positioning clamp 1 and the hard disk through the acceleration sensor 3; the acceleration sensor 3 is arranged on a system to be tested to obtain the vibration condition of the system to be tested, the system to be tested comprises a positioning clamp 1 and a hard disk, the hard disk is clamped on the positioning clamp 1, the hard disk and the positioning clamp 1 vibrate synchronously when the hard disk works, and the acceleration sensor 3 detects the X-axis acceleration and the Y-axis acceleration of the whole system to be tested; the X axis and the Y axis are two axes which are mutually perpendicular and crossed in the horizontal direction, and the rotating shaft of the motor inside the hard disk rotates along the Z axis direction, so the vibration in the Z axis direction can be ignored.
S2, calculating the resultant acceleration according to the X-axis acceleration and the Y-axis acceleration; the resultant acceleration is the vector sum of the accelerations of the devices such as the hard disk, and represents the actual acceleration of the hard disk.
And S3, calculating the centrifugal force of the system to be measured according to the resultant acceleration.
S4, calculating the offset amount according to the centrifugal force.
And S5, judging whether the offset exceeds a set range, and if so, determining that the hard disk fails due to unbalance. And obtaining the offset by utilizing the steps, and evaluating whether the hard disk fails due to unbalance by taking the offset as a judgment basis. The selection of the setting range needs to be determined by a specific hard disk and can be determined through a plurality of tests.
The hard disk fault troubleshooting method provided by the invention detects the acceleration condition of the whole system to be detected, which is formed by the positioning fixture 1 and the hard disk together, further calculates the centrifugal force of the system by utilizing the acceleration value, further calculates the offset by utilizing the centrifugal force, if the offset exceeds the set range, the failure is generated due to the failure of the motor of the hard disk, the fault of the hard disk caused by the unbalance is determined, and the aging phenomenon caused by the SPM is conveniently screened out. Due to the fact that the aged SPM can have unstable rotating speed, abnormal peak values can appear on a power spectrum.
By adopting the measuring method, the off-line measurement can be realized, the hard disk does not need to utilize production line resources, and a large amount of rework cost is saved.
On the basis of the scheme, the centrifugal force of the system to be measured is calculated by using the following formula:
F＝M*a
wherein: f is the centrifugal force of the system to be measured, M is the mass of the system to be measured, and a is the resultant acceleration. The quality M of the system to be tested comprises the quality of the whole body formed by the hard disk and the positioning clamp 1, and the hard disk motor drives the hard disk body and the positioning clamp 1 to synchronously vibrate when vibrating.
The offset is calculated using the following equation:
m*e＝F/ω^2＝M*a/ω^2
wherein: m × e is offset, m is eccentric mass, e is eccentricity, and ω is rotation speed.
The centrifugal force F of the system to be measured is calculated in the previous step, the rotating speed omega is the rotating speed of the hard disk motor, and the offset m & lte & gt is obtained through measurement according to the formula and is used as the basis for judgment.
The invention also provides a hard disk troubleshooting device, which is shown in a schematic diagram in the figure 1; the device to be measured comprises a positioning clamp 1, a control module 2 and an acceleration sensor 3, wherein the positioning clamp 1 is a supporting structure and used for clamping and fixing a device to be measured, when the device to be measured, such as a hard disk, is clamped on the positioning clamp 1, the positioning clamp 1 and the hard disk vibrate synchronously, and the positioning clamp 1 and the hard disk jointly form a system to be measured. The positioning fixture 1 can be matched with clamping structures with different specifications according to the difference of the equipment to be detected, and can be matched with equipment with different external dimensions.
The acceleration sensor 3 is used for detecting the acceleration of the equipment, and the acceleration sensor 3 is fixed on the outer surface of the equipment to be detected through an adapter; the control module 2 receives the X-axis acceleration and the Y-axis acceleration detected by the acceleration sensor 3, and calculates resultant acceleration according to the X-axis acceleration and the Y-axis acceleration; calculating the centrifugal force of the system to be measured according to the resultant acceleration; calculating the offset by the centrifugal force of the system to be measured; the control module 2 can determine whether the offset exceeds the set range, thereby determining whether the hard disk fails due to the unbalance amount.
The control module 2 is used for receiving data, calculating to make a judgment result, and the calculation process is automatically completed by the control module 2, and the specific process refers to the hard disk fault troubleshooting method. By adopting the balance off-line measuring device of the invention and utilizing the hard disk fault troubleshooting method, the technical effect can be achieved.
The hard disk troubleshooting device further comprises a supporting base 4, wherein the supporting base 4 is a supporting structure, and the positioning clamp 1 is placed on the upper surface of the supporting base 4; the upper surface of support base 4 sets up rubber shock insulation piece 5, and rubber shock insulation piece 5 is used for supporting positioning fixture 1, makes the system under test that positioning fixture 1 and hard disk constitute through rubber shock insulation piece 5, reduces the interference that external factor caused to the system under test. The rubber shock insulation blocks 5 are arranged in an array shape and at least four are arranged.
The signal connection part of the acceleration sensor 3 and the positioning clamp 1 is provided with a grounding wire, signal interference is eliminated through grounding, noise is removed, and the accuracy of detected acceleration data is ensured.
The acceleration sensor 3 is a three-axis acceleration sensor, can detect accelerations of three dimensions of an X axis, a Y axis and a Z axis at the same time, and mainly uses acceleration data of the X axis and the Y axis for calculation.
The control module 2 comprises a data acquisition card (DAQ) which is connected with the acceleration sensor 3 through a signal line and respectively acquires acceleration data in the directions of an X axis, a Y axis and a Z axis.
The invention introduces a concept and a method for portable testing of HDD/SPM immbalance. And starting from the angle that the unbalanced centrifugal force acts on the rotor to cause vibration, the unbalance amount of the rotor is inversely calculated by measuring the acceleration of the system.
A method for rapidly and accurately judging the abnormal rotating speed of the motor is provided. The system reads the first-order frequency of the motor in stable rotation by a method of testing the power spectrum of the 3 Axis. The motor speed is accurately calculated by the first order Frequency, and the motor speed RPM is 60 times Frequency (first order).
A rapid diagnosis method for the failure of the rotating structure is provided. A test method for off-line solving motor imbalance test is provided. The system judges whether the structure is abnormal or not by tracking the rotation in real time aiming at the waveform and monitoring the power spectrum, is portable and easy to build, and can quickly test the unbalance of the motor on a client site and any occasions. Production line resources are greatly saved, and diagnosis efficiency is improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A hard disk troubleshooting method is characterized by comprising the following steps:
respectively acquiring the X-axis acceleration and the Y-axis acceleration of a tested system which is jointly composed of the positioning clamp (1) and the hard disk through an acceleration sensor (3);
calculating resultant acceleration according to the X-axis acceleration and the Y-axis acceleration;
calculating the centrifugal force of the system to be measured according to the resultant acceleration;
calculating an offset from the measured system centrifugal force;
and judging whether the offset exceeds a set range, and if so, determining that the hard disk fails due to unbalance.
2. The hard disk troubleshooting method of claim 1, wherein the measured system centrifugal force is calculated using the following formula:
F＝M*a
wherein: f is the centrifugal force of the system to be measured, M is the mass of the system to be measured, and a is the resultant acceleration.
3. The hard disk troubleshooting method of claim 2 wherein the offset is calculated using the formula:
m*e＝F/(ω^2)＝M*a/(ω^2)
wherein: m × e is the offset, m is the eccentric mass, e is the eccentricity, and ω is the rotational speed.
4. The hard disk troubleshooting device is characterized by comprising a positioning clamp (1), a control module (2) and an acceleration sensor (3), wherein the positioning clamp (1) is used for clamping and fixing detected equipment, the acceleration sensor (3) is used for detecting the acceleration of a detected system which is jointly composed of the positioning clamp (1) and a hard disk, the control module (2) receives the X-axis acceleration and the Y-axis acceleration which are detected by the acceleration sensor (3), and the resultant acceleration is calculated according to the X-axis acceleration and the Y-axis acceleration; calculating the centrifugal force of the system to be measured according to the resultant acceleration; calculating an offset from the measured system centrifugal force; the control module (2) can judge whether the offset exceeds a set range, so that whether the hard disk fails due to unbalance is determined.
5. The hard disk troubleshooting device of claim 4, further comprising a support base (4), wherein a rubber shock-proof block (5) is arranged on the upper surface of the support base (4), and the rubber shock-proof block (5) is used for supporting the positioning fixture (1).
6. The hard disk troubleshooting device of claim 4, characterized in that a ground wire is provided at a signal connection of the acceleration sensor (3) and the positioning jig (1).
7. Hard disk troubleshooting device according to claim 4 characterized in that the acceleration sensor (3) is a triaxial acceleration sensor.
8. The hard disk troubleshooting device of claim 7, wherein the control module (2) comprises a data acquisition card, and the data acquisition card is connected to the acceleration sensor (3) through a signal line and respectively acquires acceleration data in X-axis, Y-axis and Z-axis directions.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110929351.0A CN113720530A (en) | 2021-08-13 | 2021-08-13 | Hard disk troubleshooting method and hard disk troubleshooting device |
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| CN202110929351.0A CN113720530A (en) | 2021-08-13 | 2021-08-13 | Hard disk troubleshooting method and hard disk troubleshooting device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6094047A (en) * | 1997-12-02 | 2000-07-25 | Guzik Technical Enterprises | Method and apparatus for balancing rotating components of a spinstand of a magnetic head and disk tester |
| JP2001332008A (en) * | 2000-05-19 | 2001-11-30 | Hitachi Ltd | Disk device |
| JP2002071503A (en) * | 2000-09-04 | 2002-03-08 | Hitachi Ltd | Umbalance correction mechanism and its method, disk device and information apparatus |
| US20040095669A1 (en) * | 2002-11-20 | 2004-05-20 | Samsung Electronics Co. Ltd. | Hard disk balancing apparatus and method for hard disk drive |
| CN201514306U (en) * | 2009-09-23 | 2010-06-23 | 东莞市杰创电子测控科技有限公司 | Dynamic balance testing device |
-
2021
- 2021-08-13 CN CN202110929351.0A patent/CN113720530A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6094047A (en) * | 1997-12-02 | 2000-07-25 | Guzik Technical Enterprises | Method and apparatus for balancing rotating components of a spinstand of a magnetic head and disk tester |
| JP2001332008A (en) * | 2000-05-19 | 2001-11-30 | Hitachi Ltd | Disk device |
| JP2002071503A (en) * | 2000-09-04 | 2002-03-08 | Hitachi Ltd | Umbalance correction mechanism and its method, disk device and information apparatus |
| US20040095669A1 (en) * | 2002-11-20 | 2004-05-20 | Samsung Electronics Co. Ltd. | Hard disk balancing apparatus and method for hard disk drive |
| CN201514306U (en) * | 2009-09-23 | 2010-06-23 | 东莞市杰创电子测控科技有限公司 | Dynamic balance testing device |
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