Growth experience electron is white board essence locates test technology introd

Actor inferior position of the technology is analysed

Advantage:

1, location is relatively exact

2, adaptability is strong, can use on the equipment of different area

Inferior position:

1, fixed position precision is inhomogenous

2, suffer temperature the impact is bigger

3, need to be written with special drawing

Use the main manufacturer of this technology

HITACHI, IBEAM

At present market share shows this skill downtrend

5: CCD light scans (video dogs)

Principle of CCD light scanning is: The sets two fixed spaces at the same time CCD line in active area blast detector and infra-red emitter, target active area. In the additionally 3 edges of active area the setting can reflex reflection film of the light, when be held back without the object, line blast what CCD detects is a whole smooth area. When the object holds off the light to spread way in active area, online a meeting in the smooth belt that CCD detects appear without glance area, the response of keep out region that distributings to detect respectively in the CCD of two horn is online the corresponding area of a CCD, according to corresponding area computation gives an object to be in the position of active area, it is way of orientation of test of a kind of crossing. This technology is newer technology, mature not completely, its biggest advantage is to be able to do much dot to be felt at the same time, outside trying a gender to use except a few manufacturer, gain ground not completely still, usable material is not much.