CN103401629A - Special-purpose RS422 clock expanded output system - Google Patents
Special-purpose RS422 clock expanded output system Download PDFInfo
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- CN103401629A CN103401629A CN2013102292090A CN201310229209A CN103401629A CN 103401629 A CN103401629 A CN 103401629A CN 2013102292090 A CN2013102292090 A CN 2013102292090A CN 201310229209 A CN201310229209 A CN 201310229209A CN 103401629 A CN103401629 A CN 103401629A
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Abstract
The invention discloses a special-purpose RS422 clock expanded output system, relating to network time synchronizing equipment. The system comprises an input signal processing and managing module, main/standby local clock modules, a passive backboard bus module, an output module, an NTP (Network Time Protocol) expanded output module and an RS422 expanded output module, wherein the passive backboard bus module, the output module, the NTP expanded output module and the RS422 expanded output module are successively connected with special customized signal lines. The special-purpose RS422 clock expanded output system includes a redundant clock module which locks GPS (Global Positioning System)/Beidou satellite signals, thereby providing a primary time source; a time phase measuring and algorithm maintaining circuit is provided, so that excellent maintenance features are provided; and the invention defines a time expansion format for the special customized signal lines, so that time output formats and quantity can be flexibly configured for various systems.
Description
Technical field
The present invention relates to the network time synchronization device, related in particular to a kind of special-purpose RS422 clock expansion output system.
Background technology
Along with the development of information technology and electronic product with in the extensive use of all trades and professions, deep transformation has also been occurred in requirement and the demand of time synchronized.in subway system, in the track traffics such as high-speed railways, the dispatcher of control centre, Platform attendant, the temporal information that all departments relevant to driving and passenger need to seek unity of standard, other each systems, as signal system, automatic ticket checking system, video monitoring system, broadcast system, passenger's standing system, automatic fire alarm system, safety-protection system, wireless and wired communication scheduling system, mistake record system etc. all needs the accurately temporal information of unified standard, this is for guaranteeing track traffic operation accurate timing, improve efficiency of operation and play very important effect.
In electric power system, the places such as power communication scheduling net, power plant and transformer station all need point-device time synchronized to control.The time synchronized deviation of millisecond or Microsecond grade can cause the interruption of system, and the even paralysis of electrical network brings huge loss for client and Utilities Electric Co..Therefore, high-precision clock synchronization system is to ensure power plant, transformer station and the unimpeded essential condition of power communication.
In financial sector, real-time transaction system, communication system and the disaster recovery system of each big bank, card Securities system all need time synchronized to control, and the high frequency transaction can realize buying and sell millions of stock with the speed of millisecond.
The method of generally using in the world at present is the UTC(universal time by the satellite navigation system of clock synchronization system download GPS, the Big Dipper or GLONASS GLONASS) and be applied to each and need the communication apparatus of precision clock signal, realize the time synchronized of various communication apparatus.
In above-mentioned various systems, various form and quantity by the temporal information of synchro system and equipment needs are all different, and as the track traffics such as subway needs is Network Time Protocol time signal and RS422 time code signal; Electric power system needs Network Time Protocol time signal, RS422 time code signal, 1PPS, 1PPM, the pulse of 1PPH timing code and IRIG-B timing code; Intelligence hospital needs the Network Time Protocol time signal, the RS422 time code signal, and the Bank Danamon system needs the Network Time Protocol time signal.In view of this, a kind of precision of the urgent need of above-mentioned various systems is high, expense is low, output signal form and flexible, the safe time synchronism apparatus of quantity.
Summary of the invention
Technical problem to be solved by this invention is multiple time output format and the expansion way of output of synchronizer settling time, and a kind of special-purpose RS422 clock expansion output system is provided.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
A kind of special-purpose RS422 clock expansion output system, comprise input signal processing and administration module, standby usage local clock module, passive backplane bus module, output module, NTP expansion output module and RS422 expansion output module, passive backplane bus module, output module, NTP expansion output module are connected output module and are connected successively by self-defined signal special line with RS422:
Input signal is processed and administration module: reception ﹠ disposal gps satellite signal or Big Dipper satellite signal also provide reference clock to standby usage local clock module, and input signal is processed and administration module is managed whole system simultaneously;
Standby usage local clock module: for NTP time protocol and RS422 timing code agreement receiving system provide local reference clock; This module can be completed monitoring, measurement and processing, the retention data of signal input time, and the stable accurate output that keeps is provided;
Passive backplane bus: realize that the seamless switching of master/backup clock signal and internal signal are mutual;
Output module: the signal of port redundancy, not only the direct two-way RS422 time signal of port redundancy, can output to the self-defined signal special line spread signal of expansion output module simultaneously to NTP expansion output module and RS422 expansion output module;
RS422 expands output module: be received from the definition signal special line, output 24 tunnel independence RS422 time signals, have by transmission channel and manage by the ability of synchronizer; Self-defined signal special line is sent to next expansion output module; Realize the cascade of NTP expansion output module and RS422 expansion output module;
NTP expands output module: be received from the definition signal special line, can export simultaneously 8 independently NTP time signals, and have by transmission channel and manage by the ability of synchronizer; Simultaneously self-defined signal special line is sent to next expansion output module, realize the cascade of NTP expansion output module and RS422 expansion output module;
, by the self-defined signal special line of spread signal, can provide various output time signal format and quantity at the different expansion output module of this foundational development, to meet other different time synchronized demands.
Preferably, active and standby local clock module comprises the local clock oscillator, and active and standby local clock module selects different local clock oscillators to realize different synchronization accuracies and stability.In this device, active and standby local clock module,, for device provides local reference clock, be the basis of device precision; Device adopts master-slave redundancy configuration and seamless switching technique, has guaranteed the safety and stability of device; Configure the time signal that different local oscillators can obtain different accuracy, frequency, phase place and time that the measuring circuit that module adopts MPU and field programmable gate array (FPGA) to form is measured input signal, historical phase data and the temperature data of study, provide remarkable retention.
Preferably, the whole system device can configure NTP expansion output module and the RS422 expansion output module of varying number according to the demand of reality.Can select different local clock oscillators to synchronization accuracy and stability and the precision of frequency output and the requirement of stability according to receiving system place system thus, the quantity of one-level expansion module maximizes to reach cost benefit.
The present invention, owing to having adopted above technical scheme, has significant technique effect:
The present invention has redundancy local clock module locking GPS/ Big Dipper satellite signal, and the one-level time source is provided; The circuit of measuring and keep algorithm time phase is provided, remarkable retention performance is provided; Define in the present invention a kind of self-defined signal special line temporal extension form, be the various time output formats of various system flexible configuration and quantity.
Description of drawings
Fig. 1 is system construction drawing of the present invention.
Fig. 2 is the active and standby local clock modular structure of the present invention figure.
Fig. 3 is that input signal of the present invention is processed and the administration module structure chart.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Embodiment 1
A kind of special-purpose RS422 clock expansion output system, as shown in Figure 1, input signal processing and administration module, standby usage local clock module, passive backplane bus module, output module, NTP expansion output module and RS422 expansion output module.
As shown in Figure 1, it has comprised input signal and administration module, standby usage local clock module, passive backplane, output module, NTP expansion output module and RS422 expansion output module.Input signal and administration module reception ﹠ disposal gps satellite signal or Big Dipper satellite signal also provide reference clock, the management of being responsible for simultaneously whole device comprise management RS422 expansion output module, NTP expansion module and connect by synchronizer (secondary clock); Active and standby local clock module provides two local clocks of master-slave redundancy for device, measure frequency, phase place and the time of calculating the input satellite-signal, and in the situation that lose reference source input time, provide stable and accurate and keep the output time signal, and export simultaneously NTP signal and the RS422 signal of two-way redundancy; Passive backplane has been realized seamless switching and the internal signal synchronisation of master/backup clock signal; Output module goes out the signal of redundancy, and not only the two-way RS422 time signal of direct port redundancy, also output to the self-defined signal special line spread signal of expansion output to NTP expansion output module and RS422 expansion module; RS422 expansion output module output RS422 time signal, and have by transmission channel and manage by the ability of synchronizer; A plurality of NTP time signals of NTP expansion output module output, and have by transmission channel and manage by the ability of synchronizer.
Active and standby local clock module, system configuration as shown in Figure 2,, for device provides local reference clock, are the bases of device precision; Device adopts master-slave redundancy configuration and seamless switching technique, has guaranteed the safety and stability of device; Configure the time signal that different local oscillators can obtain different accuracy, frequency, phase place and time that the measuring circuit that module adopts MPU and field programmable gate array (FPGA) to form is measured input signal, historical phase data and the temperature data of study, provide remarkable retention.
Input signal is processed and administration module, system configuration as shown in Figure 3, reception ﹠ disposal gps satellite signal or Big Dipper satellite signal also provide reference clock, be responsible for simultaneously the management of whole device, comprise by self-defined signal special line outgoing management RS422 expansion output module, NTP expansion module and connect by synchronizer (secondary clock), manage configuration, state and the alarm of each expansion module and secondary clock.
Output module, the clock signal of port redundancy, not only the two-way RS422 time signal of direct port redundancy, also output to the self-defined signal special line spread signal of expansion output module to NTP expansion output module and RS422 expansion module; Simultaneously also by self-defined signal special line spread signal administration extensions module; Device has kept at the different expansion output module of self-defined signal special line spread signal foundational development, and various output time signal format and quantity are provided, to meet the function of other different time synchronized demands.
RS422 expands output module, is received from the definition signal special line, can export simultaneously independently RS422 time signal of 24 tunnels, and has by transmission channel and manage by the ability of synchronizer; Simultaneously self-defined signal special line is sent to next expansion output module; Realize the cascade of output expansion module;
NTP expands output module, is received from the definition signal special line, can export simultaneously 8 independently NTP time signals, and has by transmission channel and manage by the ability of synchronizer.Simultaneously self-defined signal special line is sent to next expansion output module; Realize the cascade of output expansion module;
Input and administration module also comprise a RS232 interface and a 10M/100M network interface, have setting, control, management, alarm function, realize user interface and network service and management function.
In a word, the foregoing is only preferred embodiment of the present invention, the equalization that Fan Yiben the present patent application the scope of the claims is done changes and modifies, and all should belong to the covering scope of patent of the present invention.
Claims (3)
1. a special-purpose RS422 clock is expanded output system, it is characterized in that: comprise input signal processing and administration module, standby usage local clock module, passive backplane bus module, output module, NTP expansion output module and RS422 expansion output module, passive backplane bus module, output module, NTP expansion output module are connected output module and are connected successively by self-defined signal special line with RS422:
Input signal is processed and administration module: reception ﹠ disposal gps satellite signal or Big Dipper satellite signal also provide reference clock to standby usage local clock module, and input signal is processed and administration module is managed whole system simultaneously;
Standby usage local clock module: for NTP time protocol and RS422 timing code agreement receiving system provide local reference clock; This module can be completed monitoring, measurement and processing, the retention data of signal input time, and the stable accurate output that keeps is provided;
Passive backplane bus: realize that the seamless switching of master/backup clock signal and internal signal are mutual;
Output module: the signal of port redundancy, not only the direct two-way RS422 time signal of port redundancy, can export self-defined signal special line spread signal simultaneously to NTP expansion output module and RS422 expansion output module;
RS422 expands output module: be received from the definition signal special line, output 24 tunnel independence RS422 time signals, have by transmission channel and manage by the ability of synchronizer; Self-defined signal special line is sent to next expansion output module; Realize the cascade of NTP expansion output module and RS422 expansion output module;
NTP expands output module: be received from the definition signal special line, can export simultaneously 8 independently NTP time signals, and have by transmission channel and manage by the ability of synchronizer; Simultaneously self-defined signal special line is sent to next expansion output module, realize the cascade of NTP expansion output module and RS422 expansion output module.
2. a kind of special-purpose RS422 clock according to claim 1 is expanded output system, it is characterized in that: active and standby local clock module comprises the local clock oscillator, and active and standby local clock module selects different local clock oscillators to realize different synchronization accuracies and stability.
3. a kind of special-purpose RS422 clock according to claim 1 is expanded output system, it is characterized in that: the whole system device can configure NTP expansion output module and the RS422 expansion output module of varying number according to the demand of reality.
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| CN2013102292090A CN103401629A (en) | 2013-06-07 | 2013-06-07 | Special-purpose RS422 clock expanded output system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022116071A1 (en) * | 2020-12-01 | 2022-06-09 | 中国计量科学研究院 | Time trusted calibration system used for traffic monitoring network and method for operation thereof |
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| CN201556051U (en) * | 2009-11-02 | 2010-08-18 | 上海泰坦通信工程有限公司 | Multi-input expanding clock |
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| CN201556051U (en) * | 2009-11-02 | 2010-08-18 | 上海泰坦通信工程有限公司 | Multi-input expanding clock |
| CN101789627A (en) * | 2010-01-06 | 2010-07-28 | 江苏方天电力技术有限公司 | High-precision Ethernet timing device |
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| WO2022116071A1 (en) * | 2020-12-01 | 2022-06-09 | 中国计量科学研究院 | Time trusted calibration system used for traffic monitoring network and method for operation thereof |
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Application publication date: 20131120 |