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参数资料
| 型号： | AEDT-9140F00 |
| 元件分类： | 编、解码器及复用、解复用 |
| 英文描述： | ROTARY OPTICAL POSITION ENCODER |
| 封装： | PLASTIC PACKAGE-5 |
| 文件页数： | 2/9页 |
| 文件大小： | 203K |
| 代理商： | AEDT-9140F00 |
2
Theory of Operation
The AEDT-9140 is an emitter/detector module. Coupled
with a codewheel, these modules translates rotary motion
of a shaft into a three-channel digital output.
As seen in Figure 1, the modules contain a single Light
Emitting Diode (LED) as its light source. The light is col-
limated into a parallel beam by means of a single poly-
carbonate lens located directly over the LED. Opposite the
emitter is the integrated detector circuit. This IC consists
of multiple sets of photodetectors and the signal process-
ing circuitry necessary to produce the digital waveforms.
The codewheel rotates between the emitter and detector,
causing the light beam to be interrupted by the pattern of
spaces and bars on the codewheel.
The photodiodes which detect these interruptions are
arranged in a pattern that corresponds to the radius and
design of the code-wheel. These detectors are also spaced
such that a light period on one pair of detectors corre-
sponds to a dark period on the adjacent pair of detectors.
The photodiode outputs are then fed through the signal
processing circuitry resulting in A, A-bar, B, B-bar, I and I-
bar. Comparators receive these signals and produce the
nal output for channels A and B. Due to this integrated
phasing technique, the digital output of channel A is
in quadrature with that of channel B (90 degrees out of
phase).
Denitions
Note: Refer to Figure 2
Cycles (N): The number of electrical cycles per revolution
(CPR). Note: CPR refers to the raw signal from encoder, that
is the cycles before 4x decode.
One Cycle (C): 360 electrical degrees (
qe).
One Shaft Rotation: 360 mechanical degrees, N cycles.
Cycle Error (
'C): An indication of cycle uniformity. The dier-
ence between an observed shaft angle which gives rise to
one electrical cycle, and the nominal angular increment of
1/N of a revolution.
Pulse Width (S): The number of electrical degrees that an
output is high during 1 cycle. This value is nominally
180°e or 1/2 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 electrical degrees between a
transition in the output of channel A and the neighboring
transition in the output of 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 Error (
'I): The deviation of the phase from its ideal
value of 90°e.
Direction of Rotation: When the codewheel rotates in the
clockwise direction viewing from top of the module (di-
rection from V to G), channel A will lead channel B. If the
codewheel rotates in the opposite direction, channel B
will lead channel A.
Optical Radius (Rop): The distance from the codewheel’s cen-
ter of rotation to the optical center (O.C) of the encoder
module.
Index Pulse Width (Po): The number of electrical degrees that
an index is high during one full shaft rotation. This value is
nominally 90
qe or 1/4 cycle.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AEDT-9140-F00 | 功能描述:编码器 3 Channel 256CPR RoHS:否 制造商:Avago Technologies 产品:Optical Encoders 类型:Absolute 每转脉冲: 制动器数量: 通道数量:2 安装风格:Through Hole 端接类型:Solder Pin 输出: 轴类型: 带开关: 电源电压:5 V 工作温度范围:- 40 C to + 115 C |
| AEDT-9140-G00 | 功能描述:编码器 3 Channel 360CPR RoHS:否 制造商:Avago Technologies 产品:Optical Encoders 类型:Absolute 每转脉冲: 制动器数量: 通道数量:2 安装风格:Through Hole 端接类型:Solder Pin 输出: 轴类型: 带开关: 电源电压:5 V 工作温度范围:- 40 C to + 115 C |
| AEDT-9140-H00 | 功能描述:编码器 3 Channel 400CPR RoHS:否 制造商:Avago Technologies 产品:Optical Encoders 类型:Absolute 每转脉冲: 制动器数量: 通道数量:2 安装风格:Through Hole 端接类型:Solder Pin 输出: 轴类型: 带开关: 电源电压:5 V 工作温度范围:- 40 C to + 115 C |
| AEDT-9140-I00 | 功能描述:编码器 3 Channel 512CPR RoHS:否 制造商:Avago Technologies 产品:Optical Encoders 类型:Absolute 每转脉冲: 制动器数量: 通道数量:2 安装风格:Through Hole 端接类型:Solder Pin 输出: 轴类型: 带开关: 电源电压:5 V 工作温度范围:- 40 C to + 115 C |
| AEDT-9340-B00 | 功能描述:编码器 6 Channel 1000CPR RoHS:否 制造商:Avago Technologies 产品:Optical Encoders 类型:Absolute 每转脉冲: 制动器数量: 通道数量:2 安装风格:Through Hole 端接类型:Solder Pin 输出: 轴类型: 带开关: 电源电压:5 V 工作温度范围:- 40 C to + 115 C |
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