CN102420666A

CN102420666A - Multifunctional clock synchronization device

Info

Publication number: CN102420666A
Application number: CN2011102460434A
Authority: CN
Inventors: 熊前柱; 李前; 胡浩亮; 李鹤; 李登云; 杨春燕
Original assignee: State Grid Electric Power Research Institute
Current assignee: State Grid Electric Power Research Institute
Priority date: 2011-08-25
Filing date: 2011-08-25
Publication date: 2012-04-18

Abstract

The invention relates to a multifunctional clock synchronization device used for clock synchronization and time keeping of an electronic transformer checking system. Without network, synchronous clock pulses can be provided to remote electronic transformers in real time by using an SOPC (System On Programmable Chip) system based on FPGA (Field Programmable Gate Array) and a peripheral interface conversion circuit so that long-distance connection of optical fibers or cables is avoided; meanwhile, the synchronous clock pulse delay caused by cable length is also avoided; and assurance is offered for reliable field calibration of the electronic transformers. The multifunctional clock synchronization device is characterized in that each electronic transformer in the checked system is connected with the SOPC system based on FPGA and the peripheral interface conversion circuit; and the peripheral interface conversion circuit comprises an external input GPS (Global Positioning System) light, an electric clock signal conversion circuit and forward and reverse light and electric conversion output circuit.

Description

The multifunction timepiece synchronizer

Technical field

The present invention relates to a kind of multifunction timepiece synchronizer, be specially the multifunction timepiece synchronizer that is used for electronic type transformer checking system, belong to photoelectric technology and electrical instrument technical field.

Background technology

[0002] instrument and equipments such as digitlization electrical instrument such as electronic mutual inductor, number minor electric energy meter are the visual plants of building digital transformer substation.Because digitlization measuring productses such as electronic mutual inductor and digital electric energy meter; Output be digital quantity signal, when needs carry out more on time to it, merge cells and electronic transducer calibration instrument are sampled simultaneously to same signal; Digital quantity to output compares again; And obtain error, so Synchronization Clock is a pith in the digitlization measuring equipments such as electronic transducer calibration instrument, a kind of multifunction timepiece synchronizer that is used for electronic type transformer checking system; Also can be used for simultaneously device calibration, calibratings and detection such as digital electric energy meter, and the light of output and clock synchronization, electric signaling device necessitate.

Existing clock synchronization apparatus mainly contains two types: a kind of is like Chinese invention patent " towards the clock synchronization apparatus of synchronous phase measuring in power system " (application number: 200810044872.2 applyings date: 2008-03-03) and Chinese utility model patent " GPS network clocking synchronization server " (application number: 200820122892.2 applyings date: 2008-10-14) disclosed; Be to adopt the GPS receiving time information; Then through carrier wave, optical fiber or LAN etc.; Respectively from setup time information, the shortcoming of these class methods is synchronously: need the device of optical fiber or cable connection two places, and cable or optical fiber receive distance affects; Delay phenomenon can appear in synchronised clock; Cause system accuracy to fall, construction and difficult in maintenance is invested higher relatively; Another kind of is like Chinese invention patent " a kind of clock source device and control method thereof based on the GPS pulse per second (PPS) " (application number: 201010261347.3 applyings date: 2010-08-24) disclosed; Adopt means such as feedback; The precision of output signal is improved; Be to belong to the high-precision applications environment, its construction and maintenance cost are high.The present domestic Synchronization Clock that also is not applicable to electronic mutual inductor on-site proving and laboratory verification.

Summary of the invention

The objective of the invention is problem to the background technology proposition; A kind of multifunction timepiece synchronizer is disclosed; The clock synchronization that is used for electronic type transformer checking system adopts SOPC system and peripheral interface change-over circuit based on FPGA with punctual, can for phase each other the electronic mutual inductor in long-range strange land synchronous clock pulse is provided in real time; Need not network; Avoid long distance to connect optical fiber or cable, the synchronous clock pulse of also having avoided simultaneously causing because of cable length postpones, and the reliable calibrating on-the-spot for electronic mutual inductor provides safeguard.

Technical scheme of the present invention is: the multifunction timepiece synchronizer; It is characterized in that: by each electronic mutual inductor in the system of verification; All be connected with SOPC system and peripheral interface change-over circuit based on FPGA, described peripheral interface change-over circuit comprises GPS light, electrical clock signal change-over circuit and forward and reverse light, the electric conversion output circuit of outside input.Its beneficial effect is this multifunction timepiece synchronizer, adopts the gps clock pulse per second (PPS) synchronous, and is that a plurality of GPS modules realizations are a plurality of synchronous in real time by the verification electric mutual inductor; Need not network; Its synchronization accuracy 100ns, and light output and electrical output signal interface are provided, possess the reverse output function of the light and the signal of telecommunication; Frequency and EDM Generator of Adjustable Duty Ratio also have punctual function.When the electric mutual inductor that uses when a plurality of strange lands carries out verification, need not connect the device of two places with optical fiber or cable, and the delay of synchronised clock is greatly improved also; On the other hand, this device can also be used for electric energy meter calibration or be used as photoelectric signal converter and use.

Description of drawings

Accompanying drawing 1 is an embodiment of the invention theory diagram.

Embodiment

Below in conjunction with accompanying drawing the embodiment of the invention is described further: the mark in the accompanying drawing: 1-light positive is exported to signal; The output of 2-light reverse signal, 3-electric forward signal output, 4-electric reverse signal output; 5-SOPC system; The PC software program of 6-monitoring, the input of 7-external electric signal, the input of 8-external optical signal.

Shown in accompanying drawing 1; The light signal of external GPS synchronizing clock signals or other synchronizing signal or the signal of telecommunication are through 7 or 8 input SOPC systems 5; SOPC system 5 detects the validity of external signal and the frequency of measuring-signal; And maintenance and external signal synchronously, frequency division and punctual after; Output to the electric mutual inductor or the miscellaneous equipment that are synchronized by output interface (light positive is to signal output 1, light reverse signal output 2, electric forward signal output 3, electric reverse signal output 4); Wherein frequency of output (light, electric forward and reverse signal) pulse and duty ratio are provided with by the PC software program 6 of monitoring, the frequency of the also real-time monitoring input signal of PC software program 6 of monitoring and the state of output.

The SOPC system mainly is divided into 10 major parts: second signal Synchronization module, 100Hz signal Synchronization module, Nios soft nucleus CPU, on-chip memory, sdram interface, Flash interface, timer (timer), Avalon bus, RS232 serial line interface and PIO interface.The peripheral interface change-over circuit mainly is the signal of telecommunication that the GPS photoelectricity clock signal process treatment circuit of outside input is processed the signal into the 3.3V level, and the signal of output is carried out light-to-current inversion and forward and reverse conversion output.100Hz signal Synchronization module is launched when input signal is the gps clock signal of 100Hz, it mainly accomplish to the 100Hz input signal carry out synchronously, frequency division and punctual function.Second, signal Synchronization module and signal processing module were launched when input signal is the gps clock signal of 1Hz, and it is mainly accomplished the 1Hz input signal is carried out synchronous and punctual function.The Nios soft nucleus CPU detects the validity of external signal and the frequency of measuring-signal, and controls each module work.The RS232 serial port module is used for and the PC communication, monitors the relevant parameter of Synchronization Clock in real time, and receives the instruction that is provided with of PC, changes output signal frequency and duty ratio; SOPC system configuration chip adopts the EPCS4 chip, and the external SDRAM of 8KB is used for doing Nios II program running space on the plate, and the Flash of 4MB is used for the storing software program, is enough to satisfy upgrading requirement from now on.

Claims

1. multifunction timepiece synchronizer; It is characterized in that: by each electronic mutual inductor in the system of verification; All be connected with SOPC system and peripheral interface change-over circuit based on FPGA, described peripheral interface change-over circuit comprises GPS light, electrical clock signal change-over circuit and forward and reverse light, the electric conversion output circuit of outside input.