. : .3 
Figure.2 
Table 2 Specifications of CCD camera 
Figure.3 
Scanning system 
CCIR standard, 625TV Lines, 
50fields/sce 
Image device 
1/2” frame transfer CCD 
Picture Elements 
800(H)X600(V) 
Resolution 
Horizontal: more than 570TV Lines 
Vertical: more than 400TV Lines 
Electronic shutter 
1/120-1/40000 sec 
Gain control 
NOR/LIGHT (+6db) 
Environmental 
Temperature: -10°c to 50°c 
Table 3 Specifications of image process board 
Resolution of image 
768X576 
Computer bus 
PCI 
Data of input 
256X8 bit 
Windows of collection 
User installation 
Number of input channel 
4 
Mode of use 
Plug & play 
Environment of use 
Dos,Windows, WindowsNT 
2.2 GPS unit 
The GPS receiver is selected under consideration of 
both capacity and price. Following details need to be 
checked such as the accuracy of positioning, capability 
of fracing and dynamic function etc. Motorola GPS 
receiver is designed for high performance and maximum 
flexibility in a wide range of OEM configuration. The 
highly integrated digital receiver uses the Zodiac chip 
set composed of two custom devices (Digital signal 
Processor). These two chips together with suitable 
memory devices and a minimum of external 
components form a complete low-power, high- 
performance and cost effective GPS receiver solution 
for OEMs. 
The main specifications are shown in Table 4. 
Table i 
Specification of GPS 
Ability of tracking 
12 satellites 
Dynamic features 
Speed: 950 meters/sec acceleration: 6g 
Requisition 
2 seconds typical with 10 seconds 
blockage 
Position accuracy 
Less than 25 meters (SA off) 
Less than 100 meters (SA off) 
Timing accuracy 
0.001 second (1 pps output) 
Solution Update Rate 
Once per second 
Time Mark 
Once per second 
2.3 Laser Range Finder 
Leica DATA DIS TO RS232 Laser finder is selected in 
this MMS. The features is: 
• The cooperate target is needless 
• Non-contact, spot-on measurement 
With the RS232 interface, not only the DATA DISTO 
can be operated from the computer, but also storable 
data can be transferred without restriction. 
One camera combining with DATA DISTO completes 
3D surveying of vertical plate of structure easily. The 
technical data are shown in Table 5. 
Table 5 Technical data of laser range finder 
Typical measuring accuracy 
±3mm 
Smallest unit displayed 
0.1mm across interface 
Measuring range to natural surfaces 
0.2m to 30m 
Measuring range to target plate 
20m to 100m 
Time for a measurement 
2.5sec to 10 sec 
Operation temperature 
-10“C to +50 U 
3 SYETEM FUNCTIONS 
WUMMS is a multi-purpose mobile mapping system, 
based on GPS, GIS and CCD camera. It can realize car- 
1-3-3