CN102901944A - B code clock synchronization device for field calibration of electronic mutual inductors - Google Patents
B code clock synchronization device for field calibration of electronic mutual inductors Download PDFInfo
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Abstract
The invention provides a B code clock synchronization device which is used for the clock synchronization and punctuality of electronic mutual inductor calibration systems. By using an FPGA (Field Programmable Gate Array)-based SOPC (System on Programmable Chip) system and a peripheral interface conversion circuit, the B code clock synchronization device is capable of receiving and decoding B code signals, generating B codes and synchronous second pulse signals, receiving optic input signals or electric input signals and outputting the optic signals and the electric signals of synchronous signals at the same time, and has forward and reverse functions; and the synchronization precision of the signals can be within 100ns, therefore, the B code clock synchronization device is adapted to the field calibration and laboratory calibration of the electronic mutual inductors of different factories and capable of providing guarantee for the reliable field calibration of the electronic mutual inductors.
Description
Technical field
The present invention relates to a kind of B code clock synchronization apparatus for electronic mutual inductor scene and laboratory verification, be specially the B code clock synchronization apparatus for electronic type transformer checking system, belong to photoelectric technology and electrical instrument technical field.
Background technology
The instrument and equipments such as digitizing electrical instrument such as electronic mutual inductor, number minor electric energy meter are the visual plants of building digital transformer substation.Because the digitized measurement products such as electronic mutual inductor and digital electric energy meter, what export is digital quantity signal, when needs it is carried out more punctual, merge cells and electronic transducer calibration instrument are sampled to same signal simultaneously, again the digital quantity of output compared, and obtain error, so Synchronization Clock is a pith in the digitized measurement equipment such as electronic transducer calibration instrument.At present the method for synchronization of transformer station generally adopt RS422 bus and GPS pulse per second (PPS) to the time, development along with intelligent grid, the IRIG-B code to the time because easy to use, information-carrying amount is large, to the time precision advantages of higher be promoted in transformer station, develop therefore that the IRIG-B code occurs and the clock synchronization apparatus of decoding function is of crucial importance.A kind of B code clock synchronization apparatus for the electronic mutual inductor field-checking also can be used for device calibration, calibrating and the detections such as digital electric energy meter simultaneously.
Existing B code clock synchronization apparatus mainly is the B code decoding device that adopts the frame design such as FPGA and single-chip microcomputer, the shortcoming of these class methods is: such device can only receive the B coded signal, can not send B code and pulse per second (PPS) synchronizing signal, the synchronization accuracy of signal is generally in the microsecond magnitude, and the input of incompatible light and electrical interface, can not be applied to on-site proving and the laboratory verification of electronic mutual inductor.
The present domestic B code Synchronization Clock that also is not applicable to electronic mutual inductor on-site proving and laboratory verification.Chinese utility model patent " gps satellite synchronizing clock time signal B code generating means " (application number: 200620086045.6) proposed a kind of gps satellite synchronizing clock time signal B code generating means, comprise crystal oscillating circuit, it is characterized in that: set up basic code element circuit, single-chip microcomputer, grouping of bits circuit and code element output circuit, wherein basic code element circuit comprises counter and frequency divider, the output termination counter of crystal oscillating circuit, counter connects the input end of grouping of bits circuit through frequency divider, input termination time message signals and the pps pulse per second signal of single-chip microcomputer, the output terminal of its output terminal and grouping of bits circuit together accesses the code element output circuit.This device can not be applied to on-site proving and the laboratory verification of electronic mutual inductor.
In view of this, the invention provides the B code clock synchronization apparatus for the electronic mutual inductor field-checking, to address the above problem.
Summary of the invention
The objective of the invention is the problem for the background technology proposition, a kind of B code clock synchronization apparatus is disclosed, be used for the clock synchronous of electronic type transformer checking system with punctual, employing is based on SOPC system and the peripheral interface change-over circuit of FPGA, can not only receive B coded signal and decoding, and possess B code and synchronous pps pulse per second signal occur, possess the light input signal of reception or electrical input signal, can export simultaneously light signal and the electric signal of synchronizing signal, and possesses forward and reverse function, the synchronization accuracy of signal reaches in the 100ns, can adapt to the field calibration of electronic mutual inductor and the laboratory calibration of different manufacturers, for the reliable calibrating at electronic mutual inductor scene provides safeguard.
Technical scheme of the present invention is: a kind of B code clock synchronization apparatus for the electronic mutual inductor field-checking, described B code clock synchronization apparatus comprises that mainly SOPC system based on FPGA, light positive to signal output module, light reverse signal output module, electric forward signal output module, electric reverse signal output module, monitoring module, external electric signal load module and external optical signal load module, is characterized in that:
The electric signal of outside B code clock signal or light signal are by external electric signal load module or external optical signal load module input SOPC system; After the validity of SOPC system detection external signal and the frequency and dutycycle of measuring-signal, parse pulse per second (PPS) synchronizing signal and temporal information; The pulse per second (PPS) synchronizing signal is outputed to by synchronous electric mutual inductor or miscellaneous equipment to signal output module, light reverse signal output module, electric forward signal output module and electric reverse signal output module by light positive, the state of temporal information and device operation sends to monitoring module, wherein exports the dutycycle of pulse by the monitoring module setting;
The SOPC system can also produce synchronous B coded signal and pps pulse per second signal, pps pulse per second signal is exported to signal output module, electric forward signal output module by light positive, the B coded signal is by light reverse signal output module, the output of electric reverse signal output module, for the electronic mutual inductor calibration provides clock;
Aforesaid B code clock synchronization apparatus for the electronic mutual inductor field-checking is characterized in that the SOPC system mainly is divided into three parts: the B coded signal synchronously and parsing module, B coded signal generation module, Nios soft nucleus CPU.
The invention has the beneficial effects as follows: B code clock synchronization apparatus of the present invention, can receive B code electric signal or B code optical signal, and with its decoding, output forward and reverse pulse per second (PPS) electric signal and light signal, the sampling pulse that is used for synchronous electronics mutual-inductor tester, be applicable to the existing B coded signal of transformer station and electronic mutual inductor and connected the B coded signal, need not remove electronic mutual inductor and connect good synchronizing signal, also electronic transducer calibration instrument need not be moved near the electronic mutual inductor, can carry out field calibration work; It can also send B code optical signal and electric signal in addition, simultaneously can also send with it synchronous pulse per second (PPS) light signal and electric signal, be applicable to the laboratory verification electronic mutual inductor and on-the-spot do not support the B code to the time old-fashioned electronic mutual inductor.The dutycycle of this device is adjustable, and precision is high, and also have punctual function less than 100ns lock in time, and this device can also be used for electric energy meter calibration or be used as photoelectric signal converter and use.
Description of drawings
Fig. 1 is the principle schematic of the B code clock synchronization apparatus that is used for the electronic mutual inductor field-checking of the embodiment of the invention.
Embodiment
In order to understand better the present invention, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.Those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values are equally within the listed claims limited range of the application.
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, 6-monitoring module, the input of 7-external electric signal, the input of 8-external optical signal.
As shown in Figure 1, the electric signal of outside B code clock signal or light signal are by external electric signal input 7 or external optical signal input 8 input SOPC systems 5, after the validity of SOPC system 5 detection external signals and the frequency and dutycycle of measuring-signal, parse pulse per second (PPS) synchronizing signal and temporal information, the pulse per second (PPS) synchronizing signal is by output interface: light positive is to signal output 1, light reverse signal output 2, electricity forward signal output 3, electricity reverse signal output 4 outputs to by synchronous electric mutual inductor or miscellaneous equipment, the state of temporal information and device operation sends to monitoring module 6, wherein output (light, the forward and reverse signal of electricity) dutycycle of pulse arranges (by PC access and setting) by monitoring module 6.In addition, can also the use device inner high-precision time reference of SOPC system 5, produce synchronous B coded signal and pps pulse per second signal, pps pulse per second signal is by output interface: light positive is to signal output 1, electric forward signal output 3 outputs, the B coded signal is by output interface: light reverse signal output 2, electric reverse signal output 4 outputs, and for the electronic mutual inductor calibration provides clock.SOPC system 5 mainly is divided into three parts: the B coded signal synchronously and parsing module, B coded signal generation module, Nios soft nucleus CPU.
The content that is not described in detail in this instructions belongs to the known prior art of this area professional and technical personnel.
Claims (2)
1. B code clock synchronization apparatus that is used for the electronic mutual inductor field-checking, described B code clock synchronization apparatus comprises that mainly SOPC system based on FPGA, light positive to signal output module, light reverse signal output module, electric forward signal output module, electric reverse signal output module, monitoring module, external electric signal load module and external optical signal load module, is characterized in that:
The electric signal of outside B code clock signal or light signal are by external electric signal load module or external optical signal load module input SOPC system; After the validity of SOPC system detection external signal and the frequency and dutycycle of measuring-signal, parse pulse per second (PPS) synchronizing signal and temporal information; The pulse per second (PPS) synchronizing signal is outputed to by synchronous electric mutual inductor or miscellaneous equipment to signal output module, light reverse signal output module, electric forward signal output module and electric reverse signal output module by light positive, the state of temporal information and device operation sends to monitoring module, wherein exports the dutycycle of pulse by the monitoring module setting;
The SOPC system can also produce synchronous B coded signal and pps pulse per second signal, pps pulse per second signal is exported to signal output module, electric forward signal output module by light positive, the B coded signal is by light reverse signal output module, the output of electric reverse signal output module, for the electronic mutual inductor calibration provides clock.
2. the B code clock synchronization apparatus for the electronic mutual inductor field-checking according to claim 1 is characterized in that the SOPC system mainly is divided into three parts: the B coded signal synchronously and parsing module, B coded signal generation module, Nios soft nucleus CPU.
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| CN2012103678205A CN102901944A (en) | 2012-09-27 | 2012-09-27 | B code clock synchronization device for field calibration of electronic mutual inductors |
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Application publication date: 20130130 |