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多路数据采集与分析系统的设计及应用-外文翻译-外文文献-英文文献.doc
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多路数据采集与分析系统的设计及应用-外文翻译-外文文献-英文文献.doc
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第 1 页 共 50 页
附录五
中英文资料
Multi-channel data collection and analysis
of the design and application
Abstract:The Paper mainly introduces a multichannel data acquisition and
analysis system composed of one PC and one measuring instrument. The system can
test eight products parallelly. It reduces the test cost and improves work efficiency.
The paper also gives the hardware structure and software flow diagr am of the system.
The application in the gyro test is also introduced briefly.
Key words:communication prot;data acquisition; gyro; test
With the development of computer technology and the digital measuring
instrument, usually by computer and measuring instruments to communicate with
each other in real-time data collection and use of computer powerful computing
capability to conduct the analysis of the data processing. Particularly in the large
volume of data, measuring the length of time occasions, such as the Gyro-tilt test,
using computer for automatic control of measuring instruments, automatic data
acquisition and analysis it is particularly important, can save a lot of manpower and
material resources to improve work efficiency, reduce costs , The conventional
method of testing is usually a measuring instrument at the same time can only test a
product, namely a computer and a measuring instrument test system can only be
composed of serial testing. To test multiple products at the same time, they need
multiple systems, testing products in large volume, low efficiency, such as the
composition of several sets of test system, an increase of cost. First on a machine with
a PC and a measuring instrument consisting of 8-way data collection and analysis
第 2 页 共 50 页
system, which can carry out multiple sets of product testing, at no additional cost on
the basis of a computer give full play to the advantages of automatic test, Improve
work efficiency.
1 Principle
The system hardware and software system. A PC through a RS232 port and a
measuring instrument connected, PC-parallel port (LPT) and an 8-way channel
selector attached to a 8-way connector will channel selector were connected with a
number of test products.
The working principle as shown in Figure 1. The course of testing, computer
through the parallel port 8-way control channel selection, were open different
channels, each channel for data transmission by choosing to measuring instruments,
measuring instruments through the RS232 port to the computer data sent to save, A
complete cycle of all channels of data collection, and this has also tested a number of
product features.
Figure 1 system block diagram of work
第 3 页 共 50 页
Throughout the course of testing, all the control operations have completed the
software automatically, without human intervention.
2 hardware design
The system is mainly to use the computer onboard RS232 communication ports
and digital measuring instrument of communication port connecting communications,
re-use LPT parallel port on a 8-way channel selector for access control. 8-way
channel of choice for an 8-elected one of analog switches and related circuit, the
control signals from the computer's parallel port to provide and meet shown in table 1.
Table1 The relation between channel selection and port output
Communications port output
Binary code
Channel selection select
channel
0
000
1
1
001
2
2
010
3
3
011
4
4
100
5
5
101
6
6
110
7
7
111
8
8-way channel selector industry can use the SCM, subject to additional controls,
select RS232 serial port as data transmission, because the RS232 port is the computer
and measuring instruments on the standard configuration, communicate with each
other without additional hardware , Easy to use. In addition, a serial
communication-only a bit, with only a standard data-voltage potential, hence more
difficult in data errors. In a parallel port to transfer data 8-bit, data transmission speed,
but the data vulnerable to interference. Transmission distance in a shorter amount of
data transmission larger circumstances, may be parallel port (such as GPIB, LPT, etc.)
to communicate. In addition, since LPT parallel port may signal transmission, channel
selection is suitable for the control port.
System in the course of work, good access control modules and data acquisition
module synchronization is particularly important because different channels of data
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