GIÁO TRÌNH Mô đun: KỸ THUẬT CẢM BIẾ ?· Bài 3: Cảm biến tiệm cận và một số loại cảm biến xác định vị trí và ... YÊU CẦU VỀ ĐÁNH GIÁ KẾT QUẢ HỌC TẬP BÀI 2

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    30-Jan-2018

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  • B LAO NG THNG BINH V X HI

    TNG CC DY NGH

    GIO TRNH M un: K THUT CM BIN NGH: IN T CNG NGHIP

    TRNH : CAO NG

    Ban hnh km theo Quyt nh s:120/Q-TCDN ngy 25 thng 02 nm 2013 ca Tng cc trng Tng cc Dy ngh

    Nm 2013

  • - 1 -

    TUYN B BN QUYN

    Ti liu ny thuc loi sch gio trnh nn cc ngun thng tin c th c

    php dng nguyn bn hoc trch dng cho cc mc ch v o to v tham

    kho.

    Mi mc ch khc mang tnh lch lc hoc s dng vi mc ch kinh

    doanh thiu lnh mnh s b nghim cm.

  • - 2 -

    LI GII THIU

    thc hin bin son gio trnh o to ngh in t cng nghip

    trnh Cao ng Ngh v Trung Cp Ngh, gio trnh cm bin l mt trong

    nhng gio trnh m un o to chuyn ngnh c bin son theo ni dung

    chng trnh khung c B Lao ng Thng binh X hi v Tng cc Dy

    Ngh ph duyt.

    Khi bin son, nhm bin son c gng cp nht nhng kin thc

    mi c lin quan n ni dung chng trnh o to v ph hp vi mc tiu

    o to, ni dung l thuyt v thc hnh c bin son gn vi nhu cu thc

    t trong sn xut ng thi c tnh thc tin cao.

    Ni dung gio trnh c bin son vi dung lng thi gian o to

    180 gi gm c:

    Bi 1: Bi m u cc khi nim c bn v b cm bin

    Bi 2: Cm bin nhit

    Bi 3: Cm bin tim cn v mt s loi cm bin xc nh v tr v khong

    cch khc

    Bi 4: Phng php o lu lng

    Bi 5: o vn tc vng quay v gc quay

    Bi 6: Cm bin quang in

    Trong qu trnh s dng gio trnh, tu theo yu cu cng nh khoa hc

    v cng ngh pht trin c th iu chnh thi gian v b sung nhng kin

    thc mi cho ph hp. Trong gio trnh, chng ti c ra ni dung thc tp

    ca tng bi ngi hc cng c v p dng kin thc ph hp vi k nng.

    Tuy nhin, tuy theo iu kin c s vt cht v trang thit b, cc trng c

    th s dng cho ph hp.

    Mc d c gng t chc bin son p ng c mc tiu o to

    nhng khng trnh c nhng khim khuyt. Rt mong nhn c ng gp

    kin ca cc thy, c gio, bn c nhm bin son s hiu chnh hon

    thin hn. Cc kin ng gp xin gi v Trng Cao ng ngh Lilama 2,

    Long Thnh ng Nai.

    ng Nai, ngy 10 thng 06 nm 2013

    Tham gia bin son

    1. Ch bin TS. L Vn Hin

    2. KS. L Phc Tuy

  • - 3 -

    MC LC

    MC

    TRANG

    LI GII THIU ........................................................................................ 2

    MC LC .................................................................................................... 3

    M UN K THUT CM BIN............................................................. 6

    BI M U

    KHI NIM C BN V CC B CM BIN ...................................... 8

    1. Khi nim c bn v cc b cm bin:........................................................ 8

    2. Phm vi s dng ca cm bin ................................................................. 10

    3. Phn loi cm bin: .................................................................................. 10

    YU CU V NH GI KT QU HC TP BI M U .......... 12

    BI 1

    CM BIN NHIT ............................................................................. 13

    1.1 i cng ............................................................................................... 13

    1.1.1 Thang o nhit ............................................................................ 13

    1.1.2 Nhit cn o v nhit c o ................................................ 14

    1.2 Nhit in tr Platin v Niken ................................................................ 14

    1.2.1 in tr kim loi thay i theo nhit ........................................... 14

    1.2.2 Nhit in tr Platin ......................................................................... 15

    1.2.3 Nhit in tr Niken ........................................................................ 17

    1.3 Cm bin nhit vi vt liu Silic ........................................................ 20

    1.4 IC cm bin nhit ............................................................................... 24

    1.5 Nhit in tr NTC ................................................................................. 26

    1.6 Nhit in tr PTC ................................................................................. 29

    1.7 Thc hnh vi cm bin nhit Platin Pt 100, Pt1000 v ADT70 ........ 31

    1.8 Thc hnh vi cm bin LM35............................................................... 33

    1.9 Thc hnh vi cm bin nhit in tr NTC ........................................... 34

    1.10 Thc hnh vi cm bin nhit in tr PTC ......................................... 36

    YU CU V NH GI KT QU HC TP BI 1 ........................ 38

    BI 2

    CM BIN TIM CN V CC LOI CM BIN XC NH V TR

    , KHONG CCH ..................................................................................... 39

    2.1 Cm bin tim cn (Proximity Sensor) ................................................... 39

    2.1.1 Cm bin tim cn in cm (Inductive Proximity Sensor) ............. 43

    2.1.2 Cm bin tim cn in dung (Capacitive Proximity Sensor) ........... 47

    2.2 Mt s loi cm bin xc nh v tr, khong cch khc .......................... 50

    2.2.1 Xc nh v tr v khong cch dng bin tr ................................... 50

  • - 4 -

    2.2.2 Xc nh v tr khong cch bng t cm (Inductance Transducers) . 53

    2.2.3. Xc nh v tr khong cch bng cm bin in dung (Capacitance

    Transducers ) ............................................................................................ 57

    2.2.4 Cm bin t ..................................................................................... 60

    2.2.5 Cm bin phn loi mu ................................................................... 62

    2.3 Thc hnh vi cm bin tim cn in cm ............................................ 63

    2.4 Thc hnh vi cm bin tim cn in dung........................................... 64

    2.5 Thc hnh vi cm bin t ..................................................................... 65

    2.6 Thc hnh vi cm phn loi mu .......................................................... 66

    YU CU V NH GI KT QU HC TP BI 2 ........................ 64

    BI 3

    PHNG PHP O LU LNG ........................................................ 68

    3.1. i cng .............................................................................................. 68

    3.2. Phng php o lu lng theo nguyn tc chnh lch p sut ............. 71

    3.3. Phng php o lu lng bng tn s dng xoy ................................ 76

    3.3.1. Nguyn tc hot ng ..................................................................... 76

    3.3.2. Cc u, nhc im ca phng php o lu lng dng nguyn tc

    tn s dng xoy ....................................................................................... 77

    3.3.3. Mt s ng dng ca cm bin o lu lng dng nguyn tc tn s

    dng xoy ................................................................................................. 78

    3.4. Thc hnh vi cm bin o lu lng ................................................... 78

    3.4.1. Ghi nhn cc thng s ca cm bin ............................................... 78

    3.4.2. Thit lp cc thng s cho cm bin ................................................ 80

    YU CU V NH GI KT QU HC TP BI 3 ........................ 81

    BI 4

    O VN TC VNG QUAY V GC QUAY ...................................... 83

    4.1. Mt s phng php o vn tc vng quay c bn ................................ 83

    4.2. o vn tc vng quay bng phng php Analog ................................. 83

    4.3. o vn tc vng quay bng phng php quang in t ....................... 85

    4.4. o vn tc vng quay vi nguyn tc in tr t................................... 88

    4.5. Cm bin o gc vi t hp c in tr t ............................................. 92

    4.6. My o gc tuyt i (Resolver) ........................................................... 93

    4.7. Thc hnh o gc vi encoder tng i v tuyt i ........................... 94

    4.8. Thc hnh vi cm bin o vng quay .................................................. 96

    4.8.1 Cm bin KMI15/1 .......................................................................... 96

    4.8.2 Cm bin o vng quay KMI16/1 .................................................... 97

    4.8.3 Thc hnh vi cm bin o gc KM110BH/2430, KM110BH/2470

    ................................................................................................................ .98

  • - 5 -

    YU CU V NH GI KT QU HC TP BI 4 ........................ 98

    BI 5

    CM BIN QUANG IN ..................................................................... 100

    5.1 i cng ............................................................................................. 100

    5.1.1 Tnh cht nh sng ......................................................................... 100

    5.1.2 Cc loi ngun sng ....................................................................... 101

    5.1.3 Cc cm bin quang ....................................................................... 102

    5.1.4 Mt s cm bin quang thng dng................................................ 108

    5.2 Cm bin quang loi thu pht c lp ................................................... 109

    5.3 Cm bin quang loi phn x gng ..................................................... 112

    5.4 Cm bin quang loi phn x khuch tn .............................................. 115

    5.5. Mt s ng dng ca cm bin quang in .......................................... 116

    5.6. Thc hnh vi cm bin quang ............................................................ 120

    5.6.1 Thc hnh vi cm bin quang loi ph