Transcript 幻灯片 1 - 复旦大学物理教学实验中心 Fudan

INTRODUCTION TO
Jianmin
2011.11.30
CONTENTS
What is Labview and virtual instrument?
 Basic knowledge of Labview language
 Basic knowledge of instruments
 Get started！

knowledge learnt
 Problems facing

WHAT IS LABVIEW AND VIRTUAL
INSTRUMENT?
虚拟仪器
利用显示器模拟传统仪器的控制面板，用
鼠标和键盘控制就如同使用一台专业测量仪
器一样
WHAT IS LABVIEW AND VIRTUAL
INSTRUMENT?
Sweep Voltage
Measure Current
WHAT IS LABVIEW AND VIRTUAL
INSTRUMENT?
BASIC KNOWLEDGE OF LABVIEW
LANGUAGE
优点：
1.图形化编程语言，直观、形象。
2.编译、调试非常方便
3.搜索功能、及时帮助功能顺手
4.提供几十家仪器厂商的一起驱动程序源码
5.节省开发时间
Keithley
Zurich Lock-in
Example
Princeton instrument
Stanford Instrument IGC100
BASIC KNOWLEDGE OF LABVIEW
LANGUAGE
IGC 100
Keithley 2400
Computer
Zurich Lock-in
Other Instruments
BASIC KNOWLEDGE OF INSTRUMENTS
Keithley 2400
High precise multimeter.
 Source-measure DC and sweep capabilities.



V-source , I-source
Remote interface ports.
IEEE-488/GPIB
 RS-232C

BASIC KNOWLEDGE OF INSTRUMENTS
0V
0A
GET STARTED！
Finding Drivers
GET STARTED！
IGC Ion Gauge Controller
Measure pressure between 10^-11 and 1000 Torr
using a combination of gauges
Dual Pirani gauge 0.001 to 999Torr
 Dual ion gauge 0.1 to 100Torr
 Four Capacitance Manometers
 Remote interface ports.

IEEE-488/GPIB
 RS-232
 Ethernet 10BASET e-mail


Example just VI tree!
KNOWLEDGE LEARNT
Speed！

Auto Zero
Zero
 Reference
 Signal measurement

Auto range
 NPLC (number of power line cycles)

Integration time of the A/D converter.
 50Hz
 60Hz


Filters
时间积分
快速（0.416ms）
50Hz线循环（20ms） 60Hz线循环（16.7ms）
中速（5ms）
多重采样
B
B
1.60E-008
1.20E-008
B
B
1.40E-008
3.00E-008
1.00E-008
2.50E-008
2.00E-008
1.20E-008
1.50E-008
1.00E-008
1.00E-008
8.00E-009
2.00E-008
8.00E-009
6.00E-009
B
5.00E-009
B
0次
B
1.00E-008
B
1.50E-008
6.00E-009
5.00E-009
0.00E+000
4.00E-009
4.00E-009
-5.00E-009
0.00E+000
-1.00E-008
2.00E-009
2.00E-009
-5.00E-009
-1.50E-008
10
12
14
16
18
0.00E+000
20
10
12
14
A
16
18
0.00E+000
20
10
A
10
12
14
16
18
12
14
16
20
B
B
3.00E-008
0.0000012
2.50E-008
0.0000010
20
B
1.20E-008
B
1.60E-008
1.00E-008
1.40E-008
1.20E-008
2.00E-008
8.00E-009
0.0000008
B
1.00E-008
1.50E-008
0.0000006
1.00E-008
B
B
B
2次
18
A
A
0.0000004
6.00E-009
8.00E-009
4.00E-009
6.00E-009
5.00E-009
0.0000002
4.00E-009
2.00E-009
0.00E+000
2.00E-009
0.0000000
-5.00E-009
10
12
14
16
18
20
10
12
14
16
A
18
0.00E+000
0.00E+000
20
10
A
12
14
16
18
20
10
12
14
16
A
18
20
A
B
B
B
B
0.0000012
1.20E-008
1.20E-008
0.0000010
0.0000000
1.00E-008
1.00E-008
8.00E-009
8.00E-009
6.00E-009
6.00E-009
0.0000008
-0.0000005
B
B
B
8次
B
0.0000006
-0.0000010
0.0000004
4.00E-009
4.00E-009
-0.0000015
0.0000002
2.00E-009
-0.0000020
2.00E-009
0.0000000
0.00E+000
10
12
14
16
18
10
20
12
14
16
18
10
20
12
14
18
20
A
A
A
16
0.00E+000
10
12
14
16
18
20
A
B
B
B
0.000005
B
0.0000012
1.20E-008
1.20E-008
0.000004
32次
0.0000010
1.00E-008
1.00E-008
0.0000008
0.000003
8.00E-009
8.00E-009
B
B
0.000002
0.0000004
B
B
0.0000006
6.00E-009
4.00E-009
4.00E-009
0.000001
6.00E-009
0.0000002
2.00E-009
2.00E-009
0.000000
0.0000000
10
12
14
16
A
18
20
10
12
14
16
A
18
20
0.00E+000
0.00E+000
10
12
14
16
A
18
20
10
12
14
16
A
18
20
PROBLEMS FACING

Sweep problem

From 0V to 100V, step 0.01V
0V
10V
20V
…………
100V
PROBLEMS FACING

Sweep problem
From 0V to 100V, step 0.01V
 Get stop in GPIB send message very easily.

While
DC Example