TWI588823B - Dynamic low magnetic field demagnetization method and degaussing system - Google Patents
Dynamic low magnetic field demagnetization method and degaussing system Download PDFInfo
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Description
本發明是有關於一種消磁方法及消磁系統，特別是指一種動態低磁場的消磁系統，及利用該消磁系統進行消磁的消磁方法。 The invention relates to a degaussing method and a degaussing system, in particular to a dynamic low magnetic field degaussing system and a degaussing method for degaussing using the degaussing system.
目前市面主要有二種消磁系統：線圈式消磁機與永磁式靜磁場消磁系統。參閱圖1，線圈式消磁機如台灣第200511248核准公開號發明專利案公開一種磁性資料消去裝置1，主要包含一電源電路部11、一收容部12，及一消磁線圈13。該電源電路部11能產生一峰值隨時間遞減的交流電壓。該收容部12則收納一磁性紀錄裝置(圖未示)。當該交流電壓連通至該消磁線圈13，能在該收容部12造成一磁通量密度隨時間遞減的磁場，並藉由該磁場將靜置於該收容部12中的該磁性紀錄裝置，來消除該磁性紀錄裝置的磁疇(magnetic domain)。市面上如Orient HC3800SP硬碟消磁機也是屬於線圈式消磁機。 At present, there are mainly two kinds of degaussing systems in the market: coil type degaussing machine and permanent magnet static magnetic field degaussing system. Referring to Fig. 1, a coil type degaussing machine, such as the Taiwan Patent No. 200511248, discloses a magnetic data erasing device 1, which mainly comprises a power circuit portion 11, a receiving portion 12, and a degaussing coil 13. The power supply circuit portion 11 is capable of generating an alternating voltage whose peak value decreases with time. The accommodating portion 12 houses a magnetic recording device (not shown). When the alternating voltage is connected to the degaussing coil 13, a magnetic field whose magnetic flux density decreases with time is caused in the accommodating portion 12, and the magnetic recording device that is statically placed in the accommodating portion 12 is eliminated by the magnetic field. The magnetic domain of the magnetic recording device. Orient HC3800SP hard disk degaussing machine is also a coil type degaussing machine.
永磁式靜磁場消磁系統則利用永久磁鐵產生一強度大於寫入磁場的磁場，將磁性紀錄裝置中的每一磁疇寫入同一磁極化方向(magnetization)，達成消磁的目的。市面上如Fujitsu的MagEraSURE硬碟消除機即為此類型。然 而，此類型的消磁系統周圍環繞強大磁場，容易破壞隨身用的磁卡。 The permanent magnet static magnetic field degaussing system uses a permanent magnet to generate a magnetic field having a strength greater than the writing magnetic field, and writes each magnetic domain in the magnetic recording device into the same magnetic polarization direction to achieve the purpose of degaussing. The MagEraSURE hard disk elimination machine such as Fujitsu on the market is this type. Of course However, this type of degaussing system is surrounded by a strong magnetic field, which easily destroys the magnetic card that is used.
經上述說明可知，如何避免使用強大磁場以達成消磁的目的是此技術領域的相關技術人員所待突破的難題。 According to the above description, how to avoid the use of a strong magnetic field to achieve degaussing is a difficult problem to be solved by those skilled in the art.
因此，本發明之目的，即在提供一種動態低磁場的消磁系統。 Accordingly, it is an object of the present invention to provide a dynamic demagnetization system with a dynamic low magnetic field.
本發明之另一目的，即在提供一種動態低磁場的消磁方法。 Another object of the invention is to provide a dynamic demagnetization method with a dynamic low magnetic field.
於是，本發明動態低磁場的消磁系統，用以消除記錄於一磁性裝置的一磁性資料，該動態低磁場的消磁系統包含：一輸送裝置、一第一磁力組件，及一第二磁力組件。 Therefore, the dynamic low magnetic field degaussing system of the present invention is used for eliminating a magnetic material recorded on a magnetic device. The dynamic low magnetic field degaussing system comprises: a conveying device, a first magnetic component, and a second magnetic component.
該輸送裝置帶動該磁性裝置沿一輸送方向移動。 The conveying device drives the magnetic device to move in a conveying direction.
該第一磁力組件設置於該輸送裝置的相對兩側，並提供一垂直於該輸送方向且強度介於該磁性資料之矯頑磁力(coercive field)與寫入磁場間的第一磁場。 The first magnetic component is disposed on opposite sides of the conveying device and provides a first magnetic field perpendicular to the conveying direction and having a strength between a coercive field and a writing magnetic field of the magnetic data.
該第二磁力組件與該第一磁力組件相鄰設置，並提供一相反於該第一磁場且強度介於該磁性資料之矯頑磁力與寫入磁場間的第二磁場。該第一、二磁力組件能消除與該第一、二磁場反向的該磁性資料。 The second magnetic component is disposed adjacent to the first magnetic component and provides a second magnetic field opposite to the first magnetic field and having a strength between a coercive force of the magnetic material and a write magnetic field. The first and second magnetic components can eliminate the magnetic data that is opposite to the first and second magnetic fields.
此外，本發明動態低磁場的消磁方法，用以消 除記錄於一磁性裝置的一磁性資料，該動態低磁場的消磁方法包含以下步驟：(a)準備一消磁系統，該消磁系統包含：一輸送裝置，帶動該磁性裝置沿一輸送方向移動；一第一磁力組件，設置於該輸送裝置的相對兩側，並提供一垂直於該輸送方向且強度介於該磁性資料之矯頑磁力與寫入磁場間的第一磁場；及一第二磁力組件，與該第一磁力組件相鄰設置，並提供一相反於該第一磁場且強度介於該磁性資料之矯頑磁力與寫入磁場間的第二磁場；(b)利用該輸送裝置帶動該磁性裝置自一初始位置沿該輸送方向移動並停留於該第一磁力組件所提供的該第一磁場中，藉由該第一磁場消除與該第一磁場反向的該磁性資料；及(c)利用該輸送裝置帶動該磁性裝置沿該輸送方向移動並停留於該第二磁力組件所提供的該第二磁場中，藉由該第二磁場消除與該第二磁場反向的該磁性資料。 In addition, the dynamic low magnetic field degaussing method of the present invention is used for eliminating In addition to a magnetic material recorded on a magnetic device, the dynamic low magnetic field degaussing method comprises the following steps: (a) preparing a degaussing system, the degaussing system comprising: a conveying device for driving the magnetic device to move in a conveying direction; a first magnetic component disposed on opposite sides of the conveying device and providing a first magnetic field perpendicular to the conveying direction and having a strength between a coercive force and a writing magnetic field of the magnetic material; and a second magnetic component Arranging adjacent to the first magnetic component and providing a second magnetic field opposite to the first magnetic field and having a strength between a coercive force and a writing magnetic field of the magnetic data; (b) driving the device by the conveying device Moving the magnetic device from the initial position in the conveying direction and staying in the first magnetic field provided by the first magnetic component, and the magnetic field is reversed by the first magnetic field; and (c Using the conveying device to drive the magnetic device to move along the conveying direction and stay in the second magnetic field provided by the second magnetic component, and the second magnetic field is eliminated by the second magnetic field The magnetic data.
本發明之功效在於，藉由該輸送裝置帶動該磁性裝置至強度小於寫入磁場的該第一磁場與該第二磁場進行消磁，無須使用強大磁場以完成消磁。 The invention has the effect that the magnetic device is driven by the conveying device to demagnetize the first magnetic field having a lower intensity than the writing magnetic field and the second magnetic field without using a strong magnetic field to complete degaussing.
2‧‧‧磁性裝置 2‧‧‧Magnetic device
21‧‧‧磁性資料 21‧‧‧Magnetic information
3‧‧‧輸送裝置 3‧‧‧Conveyor
4‧‧‧第一磁力組件 4‧‧‧First magnetic component
5‧‧‧第二磁力組件 5‧‧‧Second magnetic component
X‧‧‧輸送方向 X‧‧‧ conveying direction
Z1‧‧‧第一磁場 Z 1 ‧‧‧first magnetic field
Z2‧‧‧第二磁場 Z 2 ‧‧‧second magnetic field
本發明之其他的特徵及功效，將於參照圖式的 實施方式中清楚地呈現，其中：圖1是一立體分解圖，說明由台灣第200511248核准公開號發明專利案公開一種磁性資料消去裝置；圖2是一組合示意圖，說明本發明動態低磁場的消磁系統的一實施例；圖3是一步驟流程圖，說明本發明動態低磁場的消磁方法的一實施例，該實施例用於消除一磁性裝置的一磁性資料；圖4是一步驟流程圖，說明該磁性資料的變化過程；圖5是一磁力顯微鏡影像圖，說明於消磁前該磁性資料的磁疇訊號；圖6是一磁力顯微鏡影像圖，說明於消磁後該磁性資料的磁疇訊號。 Other features and effects of the present invention will be described with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a magnetic data erasing device disclosed in Taiwan Patent No. 200511248 Approved Publication No. 200511248; FIG. 2 is a combined schematic view illustrating degaussing of a dynamic low magnetic field of the present invention. An embodiment of the system; FIG. 3 is a flow chart illustrating an embodiment of a dynamic low magnetic field degaussing method of the present invention, the embodiment is for eliminating a magnetic material of a magnetic device; FIG. 4 is a flow chart of a step. The change process of the magnetic data is illustrated; FIG. 5 is a magnetic force microscope image showing the magnetic domain signal of the magnetic data before degaussing; FIG. 6 is a magnetic force microscope image showing the magnetic domain signal of the magnetic data after degaussing.
在本發明被詳細描述之前，應當注意在以下的說明內容中，類似的元件是以相同的編號來表示。 Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.
參閱圖2，本發明動態低磁場的消磁系統的一實施例，用以消除記錄於一磁性裝置2的一磁性資料21。該磁性裝置2可為獨立硬碟或是內建磁性紀錄裝置的電腦，在本實施例中是獨立硬碟為例作說明，但不以此為限。在圖2中該磁性裝置2與該磁性資料21是以假想線表示。 Referring to Figure 2, an embodiment of the dynamic low magnetic field degaussing system of the present invention is used to eliminate a magnetic material 21 recorded on a magnetic device 2. The magnetic device 2 can be a stand-alone hard disk or a computer with a built-in magnetic recording device. In the embodiment, the independent hard disk is described as an example, but not limited thereto. In Fig. 2, the magnetic device 2 and the magnetic material 21 are represented by imaginary lines.
該消磁系統包含一輸送裝置3、一第一磁力組件4，及一第二磁力組件5。 The degaussing system comprises a conveying device 3, a first magnetic component 4, and a second magnetic component 5.
該輸送裝置3帶動該磁性裝置2沿一輸送方向X 移動，並依序通過該第一磁力組件4與該第二磁力組件5。較佳地，該輸送裝置3能為滑軌或傳送帶，且其空間分布可為開放式或迴閉式，在本實施例中是開放式的滑軌為例作說明，但不以此為限。 The conveying device 3 drives the magnetic device 2 along a conveying direction X Moving, and sequentially passing the first magnetic component 4 and the second magnetic component 5. Preferably, the conveying device 3 can be a slide rail or a conveyor belt, and the space distribution thereof can be an open type or a closed type. In the embodiment, the open type slide rail is exemplified, but not limited thereto.
該第一磁力組件4設置於該輸送裝置3的相對兩側，並提供一垂直於該輸送方向X且強度介於該磁性資料21之矯頑磁力與寫入磁場間的第一磁場Z1。一般而言，該磁性資料21之寫入磁場大小約1.3至1.4特斯拉，且該磁性資料21之矯頑磁力大小約為寫入磁場的一半。 The first magnetic component 4 is disposed on opposite sides of the conveying device 3 and provides a first magnetic field Z 1 perpendicular to the conveying direction X and having an intensity between the coercive force of the magnetic material 21 and the writing magnetic field. In general, the magnetic field 21 has a write magnetic field of about 1.3 to 1.4 Tesla, and the magnetic data 21 has a coercive force of about half the write magnetic field.
該第二磁力組件5與該第一磁力組件4相鄰設置，並提供一相反於該第一磁場Z1且強度介於該磁性資料21之矯頑磁力與寫入磁場間的第二磁場Z2。 The second magnetic component 5 is disposed adjacent to the first magnetic component 4 and provides a second magnetic field Z opposite to the first magnetic field Z 1 and having a strength between the coercive force of the magnetic material 21 and the writing magnetic field. 2 .
較佳地，該第一磁力組件4與第二磁力組件5可選自永久磁鐵或電磁鐵，且可相同或不同。於本實施例中，該第一、二磁力組件4、5是分別以一對永久磁鐵為例。 Preferably, the first magnetic component 4 and the second magnetic component 5 may be selected from permanent magnets or electromagnets, and may be the same or different. In the embodiment, the first and second magnetic components 4 and 5 are respectively exemplified by a pair of permanent magnets.
參閱圖3與圖4，本發明動態低磁場的消磁方法的一實施例，包含一步驟(a)、一步驟(b)，及一步驟(c)。 Referring to FIG. 3 and FIG. 4, an embodiment of the dynamic low magnetic field degaussing method of the present invention comprises a step (a), a step (b), and a step (c).
該步驟(a)準備一如上所述的消磁系統。 This step (a) prepares a degaussing system as described above.
該步驟(b)利用該輸送裝置3帶動該磁性裝置2自一初始位置沿該輸送方向X移動並停留於該第一磁力組件4所提供的該第一磁場Z1中，藉由該第一磁場Z1消除與該第一磁場Z1反向的該磁性資料21。由於該第一磁場Z1的強度是介於該磁性資料21之矯頑磁力與寫入磁場間，因 此，該第一磁場Z1重設與該第一磁場Z1反向的該磁性資料21為無磁訊號狀態。 The step (b) uses the transport device 3 to drive the magnetic device 2 to move from the initial position along the transport direction X and stay in the first magnetic field Z 1 provided by the first magnetic component 4, by the first The magnetic field Z 1 cancels the magnetic data 21 that is opposite to the first magnetic field Z 1 . Since the intensity of the first magnetic field Z 1 is between the coercive force and the write magnetic field of the magnetic data 21, the first magnetic field Z 1 resets the magnetic data 21 opposite to the first magnetic field Z 1 . It is in the state of no magnetic signal.
該步驟(c)利用該輸送裝置3帶動該磁性裝置2沿該輸送方向X移動並停留於該第二磁力組件5所提供的該第二磁場Z2中。藉由該第二磁場Z2消除與該第二磁場Z2反向的該磁性資料21。由於該第二磁場Z2的強度是介於該磁性資料21之矯頑磁力與寫入磁場間，該第二磁場Z2重設與該第二磁場Z2反向的該磁性資料21為無磁訊號狀態。 The step (c) uses the conveying device 3 to move the magnetic device 2 along the conveying direction X and stay in the second magnetic field Z 2 provided by the second magnetic component 5. By eliminating the second magnetic field Z 2 Z 2 opposite the magnetic material 21 and the second magnetic field. Since the intensity of the second magnetic field Z 2 is between the coercive force and the write magnetic field of the magnetic data 21, the second magnetic field Z 2 resets the magnetic data 21 that is opposite to the second magnetic field Z 2 to be Magnetic signal status.
補充說明的是，於步驟(c)之後還可包含一步驟(d)。在該步驟(d)中，該輸送裝置3將該磁性裝置2重新導回該初始位置。然而，若無須將該磁性裝置2重新導回該初始位置，亦可省略此步驟。 In addition, a step (d) may be further included after the step (c). In this step (d), the transport device 3 redirects the magnetic device 2 back to the initial position. However, this step can also be omitted if the magnetic device 2 does not have to be redirected back to the initial position.
具體地說，當該磁性裝置2依序通過該第一磁力組件4與該第二磁力組件5時，該消磁系統能消除與該第一、二磁場反向的該磁性資料21。由於該第一磁場Z1與該第二磁場Z2的強度僅須介於該磁性資料21之矯頑磁力與寫入磁場間，不像習知的永磁式靜磁場消磁系統需要超過寫入磁場的強度，因此本發明可使用較低磁場強度以達成消磁的目的。 Specifically, when the magnetic device 2 sequentially passes the first magnetic component 4 and the second magnetic component 5, the degaussing system can eliminate the magnetic material 21 reversed from the first and second magnetic fields. Since the intensity of the first magnetic field Z 1 and the second magnetic field Z 2 only needs to be between the coercive force and the written magnetic field of the magnetic data 21, unlike the conventional permanent magnet static magnetic field degaussing system, the writing needs to be exceeded. The strength of the magnetic field, therefore, the present invention can use a lower magnetic field strength for the purpose of degaussing.
參閱圖5與圖6，為了進一步證實該實施例可利用低磁場完成消磁，茲以磁力顯微鏡(magnetic force microscopy)偵測消磁前(如圖5所示)與消磁後(如圖6所示)該磁性資料21的磁疇訊號。 Referring to FIG. 5 and FIG. 6, in order to further prove that the demagnetization can be completed by using a low magnetic field, magnetic force microscopy is used to detect the demagnetization (as shown in FIG. 5) and after degaussing (as shown in FIG. 6). The magnetic domain signal of the magnetic data 21.
參閱圖6並配合圖3，該第一磁場強度為0.7特斯拉，該第二磁場強度為0.7特斯拉，且該磁性裝置2停留於該第一磁場Z1的時間為至少一秒，該磁性裝置2停留於該第二磁場Z2的時間為至少一秒。由圖6可明顯看出，消磁前周期性排列的磁力圖樣在經過消磁後皆顯示為無磁訊號狀態，故可證實利用本發明的消磁系統的確可利用低磁場完成消磁。 Referring to FIG. 6 and FIG. 3, the first magnetic field strength is 0.7 Tesla, the second magnetic field strength is 0.7 Tesla, and the magnetic device 2 stays at the first magnetic field Z 1 for at least one second. The magnetic device 2 stays at the second magnetic field Z 2 for at least one second. As is apparent from Fig. 6, the magnetic patterns periodically arranged before degaussing are displayed as non-magnetic signals after degaussing, so it can be confirmed that the degaussing system using the present invention can indeed achieve degaussing using a low magnetic field.
綜上所述，本發明動態低磁場的消磁方法及其消磁系統藉由該輸送裝置3帶動該磁性裝置2至強度介於該磁性資料21之矯頑磁力與寫入磁場的該第一磁場Z1與該第二磁場Z2進行消磁，無須使用強大磁場消磁，且因使用低磁場消磁，消磁後的該磁性裝置2還可重覆使用，故確實能達成本發明之目的。 In summary, the dynamic low magnetic field degaussing method and the degaussing system of the present invention drive the magnetic device 2 to the first magnetic field Z having a strength between the coercive force and the write magnetic field of the magnetic data 21 by the transport device 3 1 Degaussing with the second magnetic field Z 2 eliminates the need for demagnetization using a strong magnetic field, and the magnetic device 2 after degaussing can be reused by using a low magnetic field demagnetization, so that the object of the present invention can be achieved.
惟以上所述者，僅為本發明之實施例而已，當不能以此限定本發明實施之範圍，即大凡依本發明申請專利範圍及專利說明書內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。 However, the above is only the embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and the patent specification of the present invention are still It is within the scope of the patent of the present invention.
2‧‧‧磁性裝置 2‧‧‧Magnetic device
21‧‧‧磁性資料 21‧‧‧Magnetic information
3‧‧‧輸送裝置 3‧‧‧Conveyor
4‧‧‧第一磁力組件 4‧‧‧First magnetic component
5‧‧‧第二磁力組件 5‧‧‧Second magnetic component
X‧‧‧輸送方向 X‧‧‧ conveying direction
Z1‧‧‧第一磁場 Z 1 ‧‧‧first magnetic field
Z2‧‧‧第二磁場 Z 2 ‧‧‧second magnetic field
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| TW104113257A TWI588823B (en) | 2015-04-24 | 2015-04-24 | Dynamic low magnetic field demagnetization method and degaussing system |
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| TWI588823B true TWI588823B (en) | 2017-06-21 |
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| TW104113257A TWI588823B (en) | 2015-04-24 | 2015-04-24 | Dynamic low magnetic field demagnetization method and degaussing system |
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| TW200809799A (en) * | 2006-02-09 | 2008-02-16 | Orient Instr Comp Co Ltd | Magnetic information erasing device |
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| CN203150117U (en) * | 2013-03-18 | 2013-08-21 | 黄通领 | Novel hard disk demagnetizing machine |
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| US20140285025A1 (en) * | 2013-03-22 | 2014-09-25 | Ppc Broadband, Inc. | Device and method for generating a corrective magnetic field for ferrite-based circuits |
| TWM508775U (en) * | 2015-04-24 | 2015-09-11 | Pandora Technology Inc | Dynamic low magnetic field degaussing system |
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| TW200511248A (en) * | 2003-08-29 | 2005-03-16 | Orient Instr Comp Co Ltd | Apparatus for erasing magnetic data and method for erasing magnetic data |
| WO2006077929A1 (en) * | 2005-01-21 | 2006-07-27 | Orient Instrument Computer Co., Ltd. | Data storage medium discarding method and containing box |
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|---|---|
| TW201638935A (en) | 2016-11-01 |
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