High-precision sequence control unit and method for remote multi-point control

Abstract

The invention provides a high-precision sequence control unit and method for remote multi-point control. A rubidium atom clock module acquires time information highly precisely synchronized with GPS standard time, and acquires a second pulse signal serving as a time reference and a 100MHz frequency signal serving as a frequency reference; Zynq-7000 comprises a PS module and a PL module; the PS module receives standard time information and control instruction triggering time through software, subtracts the current time from the triggering time to obtain countdown information, calculates the count number, and sends the count number to the PL module; the PL module realizes multiple serial ports, a timer, a storage module and a logic output function through logic design. The PS module starts the PL module for counting; after the counting is completed, the PL module outputs a logic high level to drive an MAX4824 module to output a control instruction. The high-precision sequence control unit can be widely applied to sequence control occasions with relatively high requirements for the time accuracy, particularly the control occasions which are far away (like hundreds of kilometers) and require high-precision synchronization.

Description

technical field [0001] The invention belongs to the field of long-distance multi-point sequence control, and in particular relates to a high-precision sequence control unit and method for long-distance multi-point control. Background technique [0002] The sequence control unit is a synchronous trigger control device in the measurement and control system. It is mainly used to control various test equipment to work in a predetermined time sequence to ensure the normal progress of the test and the accurate acquisition of test data. It is an important type of equipment in many tests. . [0003] In the field of sequence control, the sequence control unit is traditionally implemented by PLC (programmable logic controller), which has stable performance and high reliability. However, PLC is limited by the scanning operation mode of its software program, and the time accuracy of sequential instructions is not high, generally not better than 100 microseconds. [0004] For high-prec...

AI Technical Summary

Problems solved by technology

At present, the sequential control unit realized by the above method has high time precision, but there are problems such as small time range

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