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TW201925824A - 用於可旋轉裝置定位之光學機構 - Google Patents

用於可旋轉裝置定位之光學機構 Download PDF

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Publication number
TW201925824A
TW201925824A TW106142281A TW106142281A TW201925824A TW 201925824 A TW201925824 A TW 201925824A TW 106142281 A TW106142281 A TW 106142281A TW 106142281 A TW106142281 A TW 106142281A TW 201925824 A TW201925824 A TW 201925824A
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light
light source
rotatable
photosensitive element
hole
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TW106142281A
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楊中鼎
蔡凱合
劉世寬
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原相科技股份有限公司
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Priority to TW106142281A priority Critical patent/TW201925824A/zh
Priority to US15/939,523 priority patent/US20190170542A1/en
Priority to CN201810993946.0A priority patent/CN109870179A/zh
Publication of TW201925824A publication Critical patent/TW201925824A/zh
Priority to US16/694,167 priority patent/US11175747B2/en
Priority to US17/502,237 priority patent/US11609643B2/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • G01D5/3473—Circular or rotary encoders

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

本發明係在一可旋轉裝置上鑽孔，以在預定位置上讓光穿過該孔洞之後，讓感光元件偵測到反射光之後，完成定位確認的技術。

Description

用於可旋轉裝置定位之光學機構
本發明係用於可旋轉裝置定位的光學機構。進一步言，本發明係在一可旋轉裝置上鑽孔，以在預定位置上讓光穿過該孔洞之後，讓感光元件偵測到反射光之後，完成定位確認的技術。
習知技術為了完成可旋轉裝置定位，多是採用對面式的光學感測機構，將光源與感光元件分別設置於可旋轉裝置的對面兩側，光源的位置對準感光元件的位置，同時可旋轉裝置上設置有能夠讓光線通過的孔隙，當孔隙旋轉到光源與感光元件中間時，光線就可以穿透孔隙，而被感光元件所感測，完成定位確認。
但這樣的結構需要將光源與感光元件分別置放於裝置的兩側，因為電路需要分別佈置於兩側，就增加了製造的工藝難度。同時在擺設光源、感光元件與旋轉裝置時，也需要考慮三者之間的準確對位關係，同樣也會增加製造的工藝難度。
本發明係用於可旋轉裝置定位的光學機構。其主要目的在於將感光元件與光源擺設在相同一側，並利用幾何設計，來達成僅在預定的定位位置上，讓感光元件能夠收到光源所發出光線的反射光。為了達成此目的，感光元件與光源必須很靠近可旋轉裝置，並同時在該裝置上設置一個孔洞。藉此，當該孔洞沒有對準光源時，光源即使產生光線，也會被該平面阻擋，使光線很快地被反射，而無法被感光元件所偵測。
當孔洞對準光源時，光源將會穿過孔洞，被設置在孔洞之後的其他物件反射，此時由於光線要經過的路徑較長，因此反射光將會具有較大的照射範圍，就可以被感光元件感測。值得注意的是，光源與感光元件可以對稱於光線的反射點設置，也可以不必。這是因為光線照射到物件上時，除了對稱的反射光以外，也會產生散射的反射光，而散射的方向性更發散，因此即使感光元件與光源並不對稱於反射點設置，感光元件依然可以偵測到反射光。
第1圖繪示的是本發明的第一實施例的剖面示意圖，在本圖式當中，可旋轉裝置為一平面，可旋轉平面107上開設有一孔洞101，可供光源103所產生的光線通過，光線會照射到位於可旋轉平面107另外一側的物件111而產生反射光，此時感測元件105可以偵測到反射光，便可產生一光感測電訊號，用來代表可旋轉平面107已經轉到預定的位置。該可旋轉平面107係圍繞一轉軸109旋轉。
在本實施例中，孔洞101的直徑並非限制本發明的重點，只要能夠讓光線通過，細小的孔洞也能適用本發明。不過為了讓光線在孔洞101並未對準光源103時，反射光線不會被感測元件105偵測到，可旋轉平面107與光源103的間隔必須要很小，最好是小於0.2mm，藉此能夠侷限光線的行進。藉此，當孔洞沒有經過光源上方時，反射光線不會被感測元件偵測到。
進一步言，雖然在本實施例中，感光元件105是設置在可旋轉平面107的外側，但是在孔洞較大的實施方式中，可以同時暴露出部份光源與部份感光元件時，感光元件也可以設置在可旋轉平面的下方。光源103、感光元件105與物件111彼此間的距離關係，可以彈性調整，只要讓感光元件105能夠感測到物件111反射回來的光線即可。
第2圖繪示的是本發明的第二實施例，與前一實施例最主要的差異在於，第2圖的可旋轉平面是複數的，並且在每一個可旋轉平面上都有至少一個孔洞，在本實施例中，只有當孔洞201a、201b、201c對齊的時候，光源203所發出的光線才能穿透這些孔洞，使得反射光可以被感測元件205偵測。亦即，此時可旋轉平面207a、207b、207c都轉到預定的位置，完成定位。在本實施例中，孔洞彼此之間只要具有互相重疊的部份，就可以讓光源通過，這是光學式偵測的好處，由於光線穿過孔洞沒有體積的限制，因此在製作孔洞的工藝技術方面，不必要求太高的精度。
進一步言，限制光源203的光線行進路線的最首要平面，就是可旋轉平面207a，因此最首要的條件就是可旋轉平面207a必須要如同第一實施例一般的很貼近光源203。
第3圖繪示的是本發明的第三實施例，與第一實施例最主要的差異，在於其在可旋轉平面不同的位置上設置了複數孔洞。孔洞之間的間距設置可用來定位不同的位置。例如在本實施例當中，孔洞301b與301c的位置很接近，因此如果當平面307旋轉時，感光元件305接續收到兩次反射光線，就代表平面307旋轉到301b或者301c的位置，視旋轉方向而定。而當平面307旋轉時，只收到一次反射光線的話，就代表平面307旋轉到301a的位置。
在前述實施例當中，為了讓光源的光線具有特殊性，也可以在感光元件上或者孔洞之間加裝濾光片，使得只有特定波長的光線成為需要被偵測的對象，增進感測效果。
本發明可以利用在手錶的對時，當手錶接收到一個正確的時間訊號時，可以藉著本發明讓指針移動到正確的位置上，就可以完成對時。本發明也可以用在迴轉式的儀表板或者齒輪歸零使用，例如計算流量或者計算電力使用度數的儀表板，或者利用齒輪帶動來輸送物品的輸送系統等。
101、201a 、201b、201c、301a、301b、301c‧‧‧孔洞
103、203、303‧‧‧光源
105、205、305‧‧‧感光元件
107、207a、207b、207c、307‧‧‧可旋轉平面
109‧‧‧轉軸
111‧‧‧物件
第1圖繪示本發明的第一實施例的剖面示意圖；
第2圖繪示本發明的第二實施例，具有多個可旋轉裝置；
第3圖繪示本發明的第三實施例，在不同位置設置有多個孔洞。

Claims (1)

  1. 一用於可旋轉裝置定位的光學機構，具有： 一光源，用以發射一光線，可穿透一可旋轉裝置上的一孔洞，並照射在一物件上，該物件位於該可旋轉裝置之另一側，並產生一反射光； 一感光元件，用以接收該反射光，並產生一定位訊號；其中 該光源與該感光元件設置在該可旋轉裝置的同一側，該光源非常靠近該可旋轉裝置，使得當該孔洞沒有經過該光源上方時，該感光元件無法偵測到反射光。
TW106142281A 2013-02-04 2017-12-01 用於可旋轉裝置定位之光學機構 TW201925824A (zh)

Priority Applications (5)

Application Number Priority Date Filing Date Title
TW106142281A TW201925824A (zh) 2017-12-01 2017-12-01 用於可旋轉裝置定位之光學機構
US15/939,523 US20190170542A1 (en) 2017-12-01 2018-03-29 Optical structure for rotation positioning
CN201810993946.0A CN109870179A (zh) 2017-12-01 2018-08-29 用于旋转定位的光学机构
US16/694,167 US11175747B2 (en) 2013-02-04 2019-11-25 Optical processing apparatus and operating method thereof
US17/502,237 US11609643B2 (en) 2013-02-04 2021-10-15 Optical processing apparatus and operating method of watch

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TW106142281A TW201925824A (zh) 2017-12-01 2017-12-01 用於可旋轉裝置定位之光學機構

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US11175747B2 (en) * 2013-02-04 2021-11-16 Pixart Imaging Inc. Optical processing apparatus and operating method thereof
JP7066987B2 (ja) * 2017-06-19 2022-05-16 船井電機株式会社 光走査装置及び光走査装置における反射部の角度検出方法
JP7338442B2 (ja) * 2019-12-16 2023-09-05 船井電機株式会社 光スキャナユニットおよび光学機器

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