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硕士学位论文
ABSTRACT
ABSTRACT
As
China
gradually
become
high-speed
railway
locomotives,
locomotive
running
fester
and
faster,
locomotives
running
at
high
speed,
the
air
vent
on
the
locomotive,
running
resistance
to
the
effects
of
major
changes
will
occur,
accurate
real-time
detection
of
locomotive
air
Content
on
the
development
of
high-speed
trains
of
high
significance.
For
our
self^developed
operating
speed
over
200km
/
h
high
speed
train,
as
the
core
of
locomotive
traction
motor
po
wer,
p
erformance
and
op
eration
of
a
vehicle
directly
determines
the
reliability
of
performance.
Which
affect
the
traction
motor
cooling
ventilation
performance
is
one
of
the
factors,
the
temperature
rise
test
is
a
very
important
element.
Traction
motor
temperature
rise
test
can
not
only
check
the
motor
manufacturing
and
assembly
process
quality,
and
traction
motor
on
the
approved
hours
of
continuous
fixed
quotas
and
whether
it
is
an
essential
design
requirement
is
the
key
link.
At
present,
China
is
still
widely
used
locomotive
with
forced
ventilation
of
the
traction
motor,
the
continuous
po
wer
rating
to
a
large
extent
dep
endent
on
the
ventilation
and
cooling
effect.
Therefore,
to
measure
accurately
the
effective
ventilation
is
very
important.
The
traditional
method
of
air
flow
measurement
there
are
some
deficiencies
in
the
current
domestic
traction
motor
ventilation
air
flow
test
device
for
testing
is
to
use
L-Pitot
ring
under
the
equal-area
multi-point
measurement
of
velocity
measurement
principle.
This
is
not
only
time
consuming,
and
because
artificial
reading
accuracy
is
not
high.
By
the
installation
location
and
piping
layout
shape,
size
restrictions,
the
original
some
test
methods
can
not
meet
the
required
standard
blower
flow
measurement,
therefore,
this
paper
presents
a
Shige
traction
motor
wind
measuring
of
smart
uniform
Guan
flow
measuring
system.
Firstly,
in-depth
study
of
the
uniform
pipe
flow
measuring
the
working
principle
of
the
theoretical
analysis
focuses
on
the
detection
rod
of
uniform
cross-section
tube
shape
and
the
mathematical
model
of
the
election.
Detection
of
the
comprehensive
analysis
of
the
status
of
traffic
and
similar
products
based
on
advanced
through
a
variety
of
classical
and
modem
methods
of
system
testing,
analyze
and
summarize
the
pros
and
cons
of
II
硕上学位论文
ABSTRACT
various
methods.
Pipe
inspection
system
proposed
new
uniform
design
project.
This
transmitter
system
for
software
and
hardware
design.
Hardware
design
of
the
sensor,
ADC
module,
the
microprocessor
core
of
digital
signal
processing
chip
is
TPs
MSP430.
Completion
of
the
system
software
design,
the
paper
gives
the
system
block
diagram.
Finally,
the
system
tests
and
results
analysis.
Experiments
show
that
the
design
of
the
new
uniform
pipe
flow
detection
system
is
well
meet
the
design
requirements.
KEY
WORDS
Air
flow
testing
,
uniform
management
,
mathematical
model
,
the
transmi
社
er
III
硕士学位论文
目录
摘要
.........................................................
ABSTRACT
............................................................................................
目录
.........................................................
第一章绪论
..................................................
1.1
弓丨言
..................................................
1.1.1
课题的来源
.....................................
1.1.2
设计的背景
.......................... ............
1.2
流量检测
..............................................
1.2.1
气体流量检测
...................................
1.2.2
各种方法的比较
................................
1.3
匀速管流量检测的研究现状
、
关键技术原理及研究意义
131
国内外研究现状和关键技术原理
.................
132
研究意义
........................................
14
本文的主要工作
.......................................
第二章匀速管流量检测的原理及结构
........................
2.1
弓
I
言
...................................................
2.2
工作特点
..............................................
2.3
工作原理
..............................................
231
充分发展管流的速度方程
........................
232
管道中的平均流速点
.............................
233
速度面积法
......................................
234
匀速管检测的测量原理
..........................
235
检测杆截面形状
.................................
2.3.6
总压检测孔的位置及数目
........................
2.3.7
总压检测孔的孔径及形状
........................
238
匀速管内部的流动
...............................
2.4
本章小结
..............................................
第三章新型匀速管流量检测系统的研究设计
..................
3.1
弓丨言
...................................................
3.2
新型匀速管结构的研究设计
............................
321
检测杆截面形状的选取
..........................
3.2.2
防淤槽的位置选择
...............................
目录
II
,7
,7
8
,8
.10
.10
J1
.12
.12
.13
.15
.15
.16
.17
.18
.19
20
.21
.21
,21
21
,22
硕士学位论文
目录
3.3
323
新型匀速管的全压孔开孔位置的计算
324
新型匀速管的全压检测孔的孔径•
…
•
…
新型匀速管的数学模型
..................
331
伯努利方程
.........................
332
匀速管的基本计算公式
.............
新型匀速管流量检测工作原理
...........
本章小结
................................
.22
,23
,24
.24
,26
3.4
3.5
第四章智能变送器的设计
....................
4.1
系统概述
..............................
4.2
压力传感器的选型
.....................
421
压电式压力传感器
...............
4.2.2
金属应变片式压阻传感器
........
423
半导体压阻式传感器
.............
4.2.4
电感式压力传感器
...............
4.2.5
电容式压力传感器
...............
4.3
变送器硬件设计
.......................
431
信号调理电路
....................
4.3.2
微控制器芯片的选型及性能
......
433
微控制器在变送器中的应用与连接
4.4
微控制器软件设计
.....................
4.4.1
软件设计思路
...................
442
系统初始化
......................
443
非线性自校正
.....
:
..............
444
校零
、
调满与校准
................
445
数字滤波
........ ................
4.5
本章小结
...............................
电磁兼容设计
..........................
电磁干扰及特性
.......................
5.1.1
电磁干扰源
.......................
5.1.2
干扰的耦合途径
..................
5.1.3
敏感设备
.........................
屏蔽设计
..............................
521
屏蔽技术
.........................
滤波电路设计
..........................
531
EMI
共模与差模信号干扰
.........
532
基本原理及特性指标
.............
.27
,28
.29
.29
29
第五章
5.1
.30
•30
.31
・
.31
.31
.32
.32
35
.36
.36
.37
38
38
.39
.40
.41
42
42
42
.42
5.2
5.3
[|
43
.44
.44
A5
45
46
硕士学位论文
目录
533
滤波器与滤波效率问题
…
534
输入输出
EMI
滤波器设计
535
信号隔离器
..............
54
本章小结
......................
第六章实验结果
.....................
6
・
1
测试结果
......................
6.2
风速测试系统
.................
第七章总结与展望
...................
7
」
本文工作总结
..................
7.2
展望
...........................
参考文献
..............................
致谢
...................................
攻读硕士期间发表的论文及科研情况••
…
.48
.49
.52
.54
.55
.55
.56
.58
.58
.58
60
63
,64
111
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