TWI241063B - Thin magnetic rotary encoder for detection of absolute position of a rotary device - Google Patents

Thin magnetic rotary encoder for detection of absolute position of a rotary device Download PDF

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Publication number
TWI241063B
TWI241063B TW93140077A TW93140077A TWI241063B TW I241063 B TWI241063 B TW I241063B TW 93140077 A TW93140077 A TW 93140077A TW 93140077 A TW93140077 A TW 93140077A TW I241063 B TWI241063 B TW I241063B
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Taiwan
Prior art keywords
magnetic
ring
encoder
magnetic ring
absolute position
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TW93140077A
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Chinese (zh)
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TW200623604A (en
Inventor
Wei-Cheng Chen
Kun-Wei Lin
Jin-Yu Lee
Ying-Chi Chuo
Chien-Sheng Liu
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Ind Tech Res Inst
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Publication of TW200623604A publication Critical patent/TW200623604A/en

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Abstract

A thin magnetic rotary encoder for detection of absolute position of a rotary device is provided, having at least one circular magnetic ring module. The magnetic ring module is arranged with at least one axial magnetic ring and at least one radial magnetic ring in a manner of concentric circles. Interlaced arrangement of the axial magnetic ring and the radial magnetic ring can reduce the magnetic interference between two magnetic rings. Therefore, a structure with smaller size than prior art is obtained under the same resolution.

Description

1241063 九、發明說明: 【發明所屬之技術領域】 性編石^㈣係關於—種磁性編碼器,特別是—種薄型絕對位置磁 【先前技術】 通當上彳f如:馬達或機構軸,的絕對位置時, 碼,此而產生如第1圖所示之二進位編 ^轉動。詈ί r感f凡件所輸出電壓的高低而產生對 應轉,ι置的母一位置之二進位識別碼。 主光;if 之光學編碼器之概要結構圖,係由一 光ί = iL 士先極體光源(led iiiumi_r) 13〇、 部分112與不透光部分114交錯排列:先==巧由透士 體光源130發出光線並照射至主^ f亟 部分112經由副光柵片!20到逵弁=^/刀先線牙過透先 JΠ4 ^ , 與不透光部分114的交錯排列,可作112 識別碼之根據,進而決定轉動裝產生二進位 編碼器之光源和光接收器置。然而,由於光學 於封㊣塵、_惡劣環s干擾,因此 ttz^TmjK23° 之外層披復一層水久磁石212。而於永夂磁;於磁豉21〇 不同磁極數之磁環,且相異之磁環間為一 徑向充磁著 第4圖中之磁鼓210上具有二極f ^舉例來說,於 犯卜迎、助、簡依序堆疊,;:二極^個磁環 ,。而於感測模、组230上具有相應磁4數^^中=袠2!4 而產生二進位編碼,進而;知,磁她1241063 IX. Description of the invention: [Technical field to which the invention belongs] Sexual knitting stone is related to a magnetic encoder, especially a thin absolute position magnet. [Prior technology] When used as a motor, such as a motor or mechanism shaft, When the absolute position of the code is turned, the binary code rotation as shown in Figure 1 is generated.感 ί r senses the output voltage of each component and generates a binary identification code corresponding to the two positions of the mother and the position. The main light; the general structure diagram of the optical encoder of the if, which consists of a light ί = iL 士 先 极 体 光 灯 (led iiiumi_r) 13〇, part 112 and opaque part 114 are staggered: first == qiaoyou toshi The volume light source 130 emits light and irradiates the main frame 112 through the sub-grating plate! 20 to 逵 弁 = ^ / The knife first floss passes through the first JΠ4 ^, and the staggered arrangement with the opaque part 114 can be used as the basis for the 112 identification code, and then it is decided to rotate the light source and light receiver to generate the binary encoder. . However, due to the interference of the optical dust and the harsh ring s, the outer layer of ttz ^ TmjK23 ° is covered with a layer of hydrous magnet 212. And Yu Yongzheng magnetic; in magnetic 豉 21〇 different magnetic poles of the magnetic ring, and between the different magnetic rings is a radial magnetization of the magnetic drum 210 in Figure 4 with two poles f ^ For example, Yu Fubu welcomed, assisted, and Jane stacked in sequence;;: two poles ^ a magnetic ring. And on the sensing module, the group 230 has a corresponding magnetic number of 4 ^^ 中 = 袠 2! 4 to generate a binary code, and further, know that magnetic her

^431918J 1241063 易且耗時,相對成本自純就提高許《:邮加工,而此加工不 久磁環所形成之二永久磁環組31G、^1; 同直$之永 磁環個數之複數個感測元件33(),如320 ’ 均ίί有度^3=631502及相鄰磁環、g2 到避免二磁環之ί性相互^擾之作用,f t定ί度足以達 外筒342和下蓋344所組成之y|d33H,由上蓋340、 f片320相傳動,並且於永f | g由穿過磁遮 會配置一感測元件330,以伯測缠312中之母一磁環均 圖所示。舉例來說,於第8 以置,如第5、8 個磁環,其訊號分別由四個U 〇、3i2共具有四 如欲再增加其解析唐:?:以::個3置,應-組特定之編碼。 六分割,則可增加永、久磁方分割,即二百五十 更高之解析度,如;9 構’即增加高度以獲得 或者是再以-磁遮蔽片^不2J兩層結構間需相距-定距離 之磁性編碼器其磁環間可 互磁場干擾。於此架構下 鼓式於堆疊製作過式固定,藉以取代磁 然而,現今各裝iir萬式’進而降低製造成本。 同解析度下,使磁性編碼哭更薄小之趨勢,因此如何能於相 仍然係此研究使其獅顧更為廣泛, 【發明内容】 垔要之研九方向。 鑒於以上的問題,本發 位置石ϋ編碼器,藉以於 供一種薄型絕對 本發明所揭露之薄型絕對更.溥型,裝置。 罝兹性編碼态,可節省成本。 1241063 碼器Si許===?對位置磁性編 _充磁表面設扁平圓盤狀結構’並且於每-磁 殼體内。""件可°又置於由—非導磁承座和一導磁外殼所組成之 向之=環可為交錯·。若當相同充磁方 中性可?之謚磁—=隔離, 磁環組所相^應方f堆疊,且相鄰之 向時則以—向;料姻之充磁方 明如下。〗本彳x骑特欲與貫作,兹配合圖示作最佳實施例詳細說 【實施方式】 為辅逆方伊容’並以圖示作 4101〜4104的充磁表面分別配置一感測元 且於各個磁環 性,進而得知應用此磁性編碼器之〜轉動务貞測磁環之磁 件均谷置於由一非導磁承座430和一導日厂=,各兀 开,。於此’係藉由非導磁承座工上之薄圓 1〜4104 ’以及藉由導磁外殼描來導-磁環 磁之磁裱交錯排列以避免二磁環間之相互3幸^σ f磁和徑向充 若相鄰之磁環為相同充磁方向時,則磁“^_圖^^環 1241063 離之關係設置上亚且’此中性環432可以-體不可分 為二極nnun之,環交錯排列來說,磁環4101係 4!〇4 ' f ^ 4103 依序為軸向磁環41〇1、 中,此磁環組410由内向外可 環4104,如第12圖示41⑽、、軸向磁環4103、徑向磁 環4102、徑向磁環41〇3、^磁徑向磁環4101、軸向磁 而就具有相鄰二相同充4104,如第13圖所示。 極數亦是由内向夕;增力,门以曰方向,_來說,磁環組中的磁環 分別為二極、四極卜:i口梅t;二磁環,卜侧、侧、麵 二排列方式為由内向外依序為^_環組41G中磁環 向磁環4103、徑向磁環41f441〇1、軸向磁環4102、軸 如问上述可以一體不 弟丨4圖所不。亚且,此中性環 j,二磁環係徑向離:承座上。若中性環所隔 中性環上。然而,同様地了應徑向磁環之感測元件鑲嵌於 ^物3、畅门二以:向方 ,磁環仏:ί 示 f4102、伽間以一中性環432 ^離,ί%相 攻太於此例中,共使用四個磁環,可緙π ' 獲得轉^置的件感測而得知的四位數位置碼: 示’其中感測'合:f:C加磁環,如第16圖 3由雙層磁環誕之配I m巧感测元件。另外圖^ 431918J 1241063 It is easy and time-consuming, and the relative cost is increased from pure. Xu: Post processing, and the two permanent magnetic ring groups 31G, ^ 1 formed by the magnetic ring shortly after this processing; Each of the sensing elements 33 (), such as 320 ′ ίί have degrees ^ 3 = 631502 and adjacent magnetic rings, g2 to avoid the mutual interference of the two magnetic rings, the ft set degree is sufficient to reach the outer tube 342 and The y | d33H composed of the lower cover 344 is driven by the upper cover 340 and f flakes 320, and the Yu Yong f | g is provided with a sensing element 330 through a magnetic shield to measure the mother-magnetic ring in 312. Both are shown in the figure. For example, at the 8th position, such as the 5th and 8th magnetic rings, the signals are respectively composed of four U 0 and 3i2. If you want to increase the resolution, you can add: :::: 3 positions, should -Group-specific encoding. Six divisions can increase the permanent and long magnetic square divisions, that is, a higher resolution of 250, such as; 9 structure 'that is, increase the height to obtain or use-magnetic shielding sheet ^ not 2J between the two-layer structure Phase-to-distance magnetic encoders can interfere with each other by magnetic fields. Under this structure, the drum type is stacked and fixed on the stack to replace the magnetic type. However, each type is now installed to reduce the manufacturing cost. At the same resolution, the magnetic code tends to be thinner and thinner. Therefore, how this can be done is still related to this study to make it more extensive. [Summary of the Invention] The nine directions of research. In view of the above problems, the present position stone ballast encoder is used to provide a thin type. The thin type disclosed in the present invention is definitely more thin. It is easy to encode the state, which can save costs. 1241063 Encoder Si Xu ===? Position magnetic encoder _ The magnetizing surface is provided with a flat disc-shaped structure ′ and is inside each magnetic case. " " Pieces can be placed in the direction consisting of a non-magnetically permeable bearing seat and a magnetically permeable shell. The rings can be staggered. If the same magnetization side is neutral? The magnetic field of the magnetic ring is isolated, and the corresponding ring groups are stacked in the corresponding direction f, and the adjacent directions are oriented in the same direction. 〖This 彳 x riding special desire and implementation, here are the best examples with the illustrations in detail [Implementation] as the auxiliary inverse party Yirong ', and the illustration of the magnetic surface of 4101 ~ 4104 is configured with a sensor In addition, it is known that the magnetic parts of the magnetic ring that is used to rotate this magnetic encoder are placed in a non-magnetically-conductive holder 430 and a guide-iron factory. . Here, 'the thin circles 1 ~ 4104 on the non-magnetically permeable bearing carrier' and the staggered arrangement of the magnetic-magnetic ring magnets by the magnetically permeable shell drawing to avoid mutual interaction between the two magnetic rings ^ σ f Magnetic and radial charging If the adjacent magnetic rings are in the same magnetizing direction, the magnetic "^ _ 图 ^^ 环 1241063" relationship is set to Shangya and 'this neutral ring 432 can-the body cannot be divided into two poles nnun In the staggered arrangement of the rings, the magnetic ring 4101 is 4! 04 'f ^ 4103, which is an axial magnetic ring 4101 in order. This magnetic ring group 410 can ring 4104 from the inside to the outside, as shown in Figure 12. 41⑽ ,, axial magnetic ring 4103, radial magnetic ring 4102, radial magnetic ring 4103, ^ magnetic radial magnetic ring 4101, axial magnetic and have adjacent two same charge 4104, as shown in Figure 13 The number of poles is also from the inside to the evening; Zengli, the direction of the gate, for example, the magnetic rings in the magnetic ring group are two poles and four poles: i 口 梅 t; two magnetic rings, side, side, The arrangement of the surface two is in order from the inside to the outside. In the ring group 41G, the magnetic ring to the magnetic ring 4103, the radial magnetic ring 41f441101, the axial magnetic ring 4102, and the shaft can be integrated as described above. No. And, this neutral ring j, The magnetic ring system is radially separated: on the seat. If the neutral ring is separated by the neutral ring. However, the sensing element that should be the radial magnetic ring is embedded in ^ 3, Changmen II: Xiangfang, Magnetic ring ί: ί shows f4102, Gamma is separated by a neutral ring 432 ^% phase attack too. In this example, a total of four magnetic rings are used. Known four-digit position code: Shows 'where sensing' is combined: f: C plus magnetic ring, as shown in Figure 16 with a double-layer magnetic ring equipped with a smart sensor element.

為經向磁環^it7磁^時’,於另—磁環組G 環、徑向二、不向匕:=磁環組由= 1241063 以一遮ί片可環排列方式,且於二磁環組間 亦配合磁環個數而增加, 8圖所不。同時,感測元件之個數 元件。於此實施例中,丑可生f合磁環而為-多頭式感測 可獲得之解析度為二的用八個磁裱搭配八個感測元件,因此, 欲再提高解析度時,亦f二即二百五十六個位置。同樣地, Γ :::,可將對應軸為方⑼⑽以 獲得較高之解析!所而之知析度而採用軸向擴充或徑向擴充ϋ ,免二磁環j 充磁之磁環交錯排列以 2 器 或射出之製程, 從度。再者,本;明可使 定本發日^^习,述^較佳實施例揭露如^ 内,當可作些許者闲3脫離本“精神和範# ίΚί,ί】申請專利範圍所界之專利保護範圍須視 ϊ2 “ίϊί 2¾¾¾ 2ί 二置之二進位_碼; ί ; 自之顧式絕對型編碼器的概要結構 型編碼_炸圖; 弟7圖係為第5圖中另一=ΐ,、、、°構圖, 第8圖物 10 $ 9圖 圖; 第 :、為兄月再另—習知之扁平式絕對型編碼器的截面 _生'^碼器^^根據本發明之第-實施例之薄型絕對位置 磁性^ i 據本發明之第二實施例之義絕對位置 圖; 圖; 圖;々Θ系為°兒明10圖中之磁環叙之-實施例的概要結構 弟13圖係為說明10圖中之磁環組之另一實施例的概要結構 ""®係為5兒明11圖中之磁環組之一實施例的概要結構 圖;弟15圖係為說明u圖中之磁環組之另一實施例的概要結構 磁性、根據本發H實施例之_絕對位置 磁性明根據本發明之第四實施例之薄型絕iH立置 磁性本㈣之#五實施例之_絕對位置 ,編弟的圖 牛符號說明】 119 .....................................光柵片 114 120 130 140 150 210 212 ……· 2121〜2124 ,不透光區域 •副光栅片 •二極體光源 •光接收器 •主軸 •磁鼓 •永久磁石 •磁環 … ......................透光區域 1241063 214 ....................... .............中性環 220 ....................... .............轉車由 230 ....................... .............感測模組 232 ....................... .............感測元件 310 、 312 ................ .............永久磁環組 3101 > 3102 ............ .............磁環· 3121 ^ 3122 ............ 314 、 316 ................ .............中性環 320 ....................... 330 ....................... .............感測元件 340 ....................... .............上蓋 342 ....................... .............外筒 344 ....................... .............下蓋 350 ....................... .............主軸 410 ....................... .............磁環組 4101〜4106.............. .............磁環 412 ....................... .............磁環組 414 ....................... .............磁環組 416 ....................... .............磁環組 420 ....................... .............感測元件 430 ....................... 432 ....................... .............中性環 440 ....................... .............導磁外殼 442 ....................... .............固定座 450 .......................For the meridional magnetic ring ^ it7 magnetic ^ h ', in another—magnetic ring group G ring, radial two, non-directional dagger: = magnetic ring group from = 1241063 can be arranged in a ring-like manner with a cover, and The number of magnetic rings is also increased between the ring groups, which is not shown in Figure 8. At the same time, the number of sensing elements. In this embodiment, the ugly can generate a magnetic ring and a multi-headed sensor can obtain eight resolutions with two magnetic mounts and eight sensing elements. Therefore, when you want to increase the resolution, f two is two hundred and fifty-six positions. Similarly, Γ :::, the corresponding axis can be squared to obtain a higher resolution! Therefore, it is known that the axial expansion or the radial expansion is adopted, and the magnetic rings free of the two magnetic rings j are arranged in a staggered arrangement with two devices or injection processes. In addition, the book can clearly make the issue date ^ ^ study, described ^ the preferred embodiment disclosed in ^, when you can make a little bit of leisure 3 to depart from the "spirit and scope # ίΚί, ί] patents within the scope of patent The scope of protection shall be based on ϊ2 "ίϊί 2¾¾¾ 2ί Two binary carry_codes; ί; Self-care type absolute encoder outline structure coding_exploded picture; Figure 7 is another in Figure 5 = ΐ, ,,, °, Figure 8 Figure 10 $ 9 Figure; Figure :, for another month-another section of the conventional flat absolute encoder _ raw '^ coder ^^ according to the first-implementation of the present invention Example of a thin absolute position magnetism ^ i According to the definition of the absolute position of the second embodiment of the present invention; Figure; Figure; 々Θ is the magnetic ring described in Figure 10-the schematic structure of the embodiment It is a schematic structural diagram illustrating another embodiment of the magnetic ring group in FIG. 10 " " ® is a schematic structural diagram of one embodiment of the magnetic ring group in FIG. 5 and FIG. 11; FIG. 15 is an explanation The outline structure of another embodiment of the magnetic ring group in the u figure is magnetic. According to the _absolute position magnetism of the embodiment H of the present invention, the magnetic position according to the fourth embodiment of the present invention is shown. Example of the thin absolute iH standing magnetic book # 5 of the _absolute position, editor's illustration of the symbol of the cattle] 119 .......... ....... Gratings 114 120 130 140 150 210 212 ...... · 2121 ~ 2124, opaque areas • Sub-gratings • Diode light source • Light receiver • Spindle • Magnetic drum • Permanent magnet • Magnetic ring ............... Transparent area 1241063 214 ........... ........................ Neutral ring 220 ........... .............. Transfer by 230 ............... .... sensing module 232 ..................... sensing element 310 、 312 .................. Permanent magnetic ring group 3101 > 3102 ............ ............. Magnetic ring 3121 ^ 3122 ............ 314, 316 ...... ............. Neutral ring 320 ............. 330 ......... .......................... Sensor element 340 ......... ................ Cover 342 ................... ..... outer tube 344 ..................... Cover 350 ......................... Spindle 410 ............ ......................... Magnet ring group 4101 ~ 4106 .................... ......... Magnetic ring 412 ................... Magnetic ring Group 414 .................... Magnet ring group 416 ............. ........................... Magnet ring group 420 ........ ................. sensing element 430 ............ 432 ................ neutral ring 440 .............. ..................... Magnetically permeable housing 442 ............. ............ 450 450

1212

Claims (1)

I24l〇63 ι· 利範圍: 編碼器,包括: 之徑向磁環以鬥磁%組,係由一個以上之軸向磁严4父 及…问心圓之方式排列而形成一扁平 2· 如申’係設置於每-該磁環之充磁表 ;· ίΐ5ίί;ϊ向磁《錯排列。 碼器’其中 更包括:、乾弟1項所狀_絕對位置磁性編碼器,其中 於相同充磁方向之二該磁環間, 5.' i相鄰之該磁 ,.$申睛專利範圍第!項所述之薄刑= 8 ίΐ環組和,測元件容置於·— 編碼器,其中 .該°殼12範圍第7項所述之薄型絕對位置磁性編碼器,其中 二及門用 每-該磁環之磁場。 仏械U〗’用以導% 座上,以隔離相同充磁方向之該刀石 1^·。關係§又置於該非導磁承 編碼器,其中 u.i^iS以㈣型絕對位置磁性編碼器,其中 13 1241063 12.如申請專利範圍第1項所述之薄型絕對位置磁性編碼器,其中 該感測元件係為一多頭式感測元件。I24l〇63 ι · Benefit range: The encoder includes: The radial magnetic ring is in the group of magnetic field%, which is arranged by one or more axial magnetic cores and 4 cores to form a flat 2 · Rushen 'Department set at each-the magnetizing table of this magnetic ring; · ίΐ 5 ί; ϊ direction magnetic "wrong arrangement. The encoders also include: 1st position of the god_absolute position magnetic encoder, which is between the two magnetic rings in the same magnetization direction, 5. 'i adjacent to the magnetic,. Number! The thin punishment described in item = 8 ί ΐ ring group, and the measuring element is housed in an encoder, in which the thin shell absolute position magnetic encoder described in item 7 of the 12 range of the ° shell, in which the two sum gates use each- The magnetic field of the magnetic ring.仏 机 U〗 is used to guide the% seat to isolate the blade 1 ^ · in the same magnetization direction. The relationship § is also placed in the non-conductive magnetic encoder, where ui ^ iS is a ㈣-type absolute position magnetic encoder, of which 13 1241063 12. The thin absolute-position magnetic encoder described in item 1 of the scope of patent application, where the sensor The sensing element is a multi-head sensing element. 1414
TW93140077A 2004-12-22 2004-12-22 Thin magnetic rotary encoder for detection of absolute position of a rotary device TWI241063B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI623189B (en) * 2016-12-15 2018-05-01 Kwang Yang Motor Co Encoder alignment method and device
DE102018219142A1 (en) 2018-11-09 2020-05-14 Hiwin Mikrosystem Corp. MAGNETIC ENCODER AND DEVICE WITH THE SAME
DE102018219144A1 (en) 2018-11-09 2020-05-14 Hiwin Mikrosystem Corp. MAGNETIC ENCODER AND DEVICE WITH THE SAME

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JP6489746B2 (en) * 2014-03-04 2019-03-27 山洋電気株式会社 Magnetic shield cover for magnetic detection encoder and magnetic detection encoder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI623189B (en) * 2016-12-15 2018-05-01 Kwang Yang Motor Co Encoder alignment method and device
DE102018219142A1 (en) 2018-11-09 2020-05-14 Hiwin Mikrosystem Corp. MAGNETIC ENCODER AND DEVICE WITH THE SAME
DE102018219144A1 (en) 2018-11-09 2020-05-14 Hiwin Mikrosystem Corp. MAGNETIC ENCODER AND DEVICE WITH THE SAME

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