1. The system collects coplanarity data of the sensor by a data acquisition card.

2. The paper presented the LASER measurement system of coplanarity. In the system, a motion card is used to drive two servo motors of the X-Y table, and the LASER sensor is on the table.

3. And an evaluating method for coplanarity is adopted, which is based on least condition principle.

4. The use of round instead of elevator guide rail, double head plate facade on a more sophisticated degree of coplanarity.

5. But the method presented is not only capable of the coplanarity measurement of the BGA, but also all other SMT chips(Sentence dictionary), in which exist the coplanarity problems.

6. The results indicate that the kind and position of the substituents in aniline ring greatly affected the conjugation system and coplanarity of the products.

7. The electronic properties of the polymers and their model compounds are well correlated with the acceptor strength, coplanarity of the backbone, and intramolecular charge transfer.

8. There are more than three operations to test the coplanarity of two guide rails though it is so small size.

9. ABSTRACT The dissertation is based on the"Study on BGA Coplanarity On-line Measurement", a research subject sponsored by...

10. The creative research works of this dissertation applied the line structured light sensor to the on-line measurement of BGA coplanarity .

11. This is a newly emerged problem in new technology. The dissertation focuses on the method of online measurement for BGA coplanarity .

12. All-orientation detection in underground mines can be implemented by uncoplanarity coaxial off-set loops, coplanarity coaxial off-set loops, or central loops in PROTEM-47 system made in Canada.