The only flat machine technical foreword of interference rejection
Along with only flat personal computer in the sphere of each application more and more extensive, for its reliability requirement, it is also high. The reliability of single flat machine system is decided by various factor , is the important index of reliability in which the systematic performance of interference rejection. Industrial environment has strong electromagnetism to disturb , therefore must be hard to stabilize otherwise with the measure of interference rejection , reliable operation.
Industrial environment in disturb is normally with pulse form enter the system of personal computer, channel has Sub_clause of 3 mainly.
Space disturbs （ site disturb ）, electromagnetism signal enters system through space radiation.
It is entered that course interference between channels disturbs to pass through the forward passageway that is linked with system, backward passageway and the mutual passageway with other system.
Power supply system disturbs , electromagnetism signal enters system through the line of power supply.
Usually space disturb in strength on is smaller than other two, so in the system of personal computer, it should be key to prevent course passageway with power supply system disturb.
The measure of interference rejection has hardware measure and software measure. If hardware measure is proper, but will unique most of disturb the door that resisted besides, but can still have few disturb to enter the system of personal computer, so, it is essential that software measure is second road defence line. Since the software measure of interference rejection is price with CPU, if have no hardware to eliminate the most, disturbs , CPU will be weighed down with work , has no time to take normal work into account , is serious to affect systematic working efficiency and real time. Therefore a successful system of interference rejection is formed from hardware and software.