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參數(shù)資料
| 型號(hào)： | HEDL-6402-IT11 |
| 英文描述： | Optical Incremental Housed Encoders |
| 中文描述： | 光電編碼器增量外套 |
| 文件頁(yè)數(shù)： | 3/8頁(yè) |
| 文件大小： | 464K |
| 代理商： | HEDL-6402-IT11 |
3
Theory of Operation
The HEDL- 64XX translates
rotary motion of a shaft into a
two or three channel digital
output. The HEDL- 64XX series
has four key parts: a single light
emitting diode (LED) light
source, a photodetector IC with
a set of uniquely configured
photodiodes , a line drive IC
and a pair of lenses. The lens
over the LED focuses light onto
the codewheel. As the codewheel
rotates, an alternating pattern of
light and dark corresponding to
the pattern of the codewheel
falls upon the photodiodes.
This light is used to produce
internal signals A and A’, and B
and B’.
As part of this “push- pull”
detector system, these signals
are fed through comparators and
line driver that are part of the
signal processing circuitry to
produce the final outputs for
channels A and B and index.
Definitions
Count (N): For rotary motion,
the number of bar and window
pairs or counts per
revolution(CPR) of the
codewheel. For linear motion,
the number of bar and window
pairs per unit length (lines per
inch[LPI] or lines per mm
[LPmm]).
One Cycle(C): 360 electrical
degree(
°e), 1 bar and window
pair.
One Shaft Rotation: 360
mechanical degrees, N cycles
(rotary motion only).
Line Density: The number of
reflective and non- reflective
pairs per unit length, expressed
as either lines per inch(LPI) or
lines per mm (LPmm).
Cycle error(
C):: An indication
of cycle uniformity. The
difference between an observed
shaft angle which gives rise to
one electrical cycle and the
nominal angular increment of 1/
N of a revolution
LENS
LED
Vcc
Gnd
Ch A
Ch B
I
RESISTOR
PHOTODIODE
SIGNAL
PROCESSING
CIRCUITY
CODEWHEEL
Pulse Width (P): The number of
the electrical degrees that an
output is high during one cycle,
nominally 180
°e or 1/2 a cycle.
Pulse Width Error(
P): The
deviation in electrical degrees of
the pulse width from its ideal
value of 180
°e.
State Width (S): The number of
the electrical degrees between a
transition in the output of the
channel B. There are 4 states
per cycle, each nominally 90
°e.
State Width Error (
S): The
deviation in electrical degrees of
each state width from its ideal
value of 90
°e.
Phase (f): The number of
electrical degrees between the
center of the high state on the
channel A and the center of the
high state of channel B. This
value is nominally 90
°e.
Phase error (
f): The deviation
in electrical degrees of the phase
from its ideal value of 90
°e.
Position error (
q):: The
normalized angular difference
between the actual shaft position
and the position indicated by
the encoder cycle count.
Index Pulse Width (Po): The
number of electrical degrees that
an index is high during one full
shaft rotation. This value is
nominally
90°e or cycle.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HEDL-6403-AP01 | Optical Incremental Housed Encoders |
| HEDL-6443-IP02 | Optical Incremental Housed Encoders |
| HEDL-6443-IP11 | Optical Incremental Housed Encoders |
| HEDL-6443-IT01 | Optical Incremental Housed Encoders |
| HEDM-5600 | Quick Assembly Two and Three Channel Optical Encoders |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HEDL-6403-AP01 | 制造商:Avago Technologies 功能描述:OPTICAL INCREMENTAL HOUSED ENCODER - Bulk 制造商:Avago Technologies 功能描述:ENCODER 2CH 500CPR 2MM |
| HEDL-6403-AP02 | 制造商:Avago Technologies 功能描述:OPTICAL INCREMENTAL HOUSED ENCODER - Bulk 制造商:Avago Technologies 功能描述:ENCODER 2CHANNEL 500CPR 3MM |
| HEDL-6403-AP11 | 制造商:Avago Technologies 功能描述:OPTICAL INCREMENTAL HOUSED ENCODER - Bulk 制造商:Avago Technologies 功能描述:ENCODER 2CH 500CPR 4MM |
| HEDL-6403-AT01 | 制造商:Avago Technologies 功能描述:OPTICAL INCREMENTAL HOUSED ENCODER - Bulk |
| HEDL-6403-AT02 | 制造商:Avago Technologies 功能描述:OPTICAL INCREMENTAL HOUSED ENCODER - Bulk |
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