CN102809749A - Device for realizing clock synchronization by extraction of satellite positioning module - Google Patents

Abstract

The invention relates to a device for realizing clock synchronization by the extraction of a satellite positioning module and particularly relates to a device for realizing clock synchronization by the extraction of a satellite positioning module, which utilizes the combination of pulses and a serial port. A satellite positioning module (101) is connected with a programmable circuit or an ASIC (application specific integrated circuit) circuit or a processor (104) through a pulse output interface (103); the satellite positioning module (101) is used for generating one-time interrupt for an interrupt signal through the pulse output interface (103) when each pulse arrives; a time signal of the satellite positioning module (101) is obtained by the programmable circuit or the ASIC or the processor (104) through a serial port output interface (102); updated serial port data obtained by the serial port output interface (102) in the interrupt are just newest synchronization time, so that accurate time can be obtained. The obtained accurate time can be applied to the time setting of each brownout of communication and the measurement on the timed monitoring by an electric power monitoring system so as to ensure that each brownout data are simultaneously collected.

Description

Satellite positioning module is extracted the clock synchronization implement device

One, technical field

The present invention relates to a kind of satellite positioning module and extract the clock synchronization implement device, particularly a kind of satellite positioning module of utilizing pulse to combine with serial ports is extracted the clock synchronization implement device.

Two, background technology

On April 27 nineteen ninety-five, U.S. Department of Defense declares: Global Positioning System (GPS) (GPS) has been built completion.

GPS is the abbreviation of English (Global Positioning System); Be that U.S. Department of Defense is the satellite navigation and location system of its land, sea, air army development; It has round-the-clock, continuous, real-time exquisite system navigation and station-keeping ability; Having a wide range of applications is worth and development prospect, is an important component part of U.S.'s whole world defence system.

The U.S. is from its global strategy, for worldwide navigation and precise guidance are provided to strategic arms.USN and Experiment of Applied Physics chamber were at development NNSS (NNSS) in 1958; This system does not receive the weather condition effect; Automaticity is higher; Have good navigation accuracy, tentatively possessed all-weather and precision navigation, in the development of airmanship, have epoch making significance; But it also has some outstanding shortcomings simultaneously: number of satellite is less, and the interval time from the ground observation to the satellite is long; Need the accurate speed data of input before the location, just can obtain the accurate localization data, its real-time is poor; In addition, along with the error of input data and the variation of antenna height, bearing accuracy also changes thereupon, thereby anti-interference is poor.In 1973, the U.S. began to develop second generation Global Navigation System---gps system, went through more than 20 year, and construction is finally accomplished and put into operation.GPS compares with other navigation positioning systems, its principal feature have following some:

1. the whole world covers continuously.Because the number of gps satellite is more and distribution is reasonable, so but observe at least 4 satellites to the equal continuous synchronization in any position on the earth, thus the whole world, round-the-clock continuous real-time navigation and location guaranteed.

2. multi-functional, high precision.GPS can be all types of user provides the three-dimensional position of dynamic object, speed and temporal information.In general, its single-point real-time positioning precision can reach 5～10 meters at present, and time difference method is about tens of nanoseconds.Along with the development of GPS measuring technique and data processing technique, its location, test the speed and time precision has further raising.

3. real-time positioning speed is fast.Utilize GPS positioning system one-time positioning can accomplish (NNSS needs 8～10 minutes approximately) with testing the speed to be operated in one second to several seconds.This object to fast moving is very important.

4. anti-interference good with security performance.Because GPS has adopted the specific coding technology of digital communication, promptly pseudo-random code is technological, thereby has good anti-interference and confidentiality.

Three, summary of the invention

The problem that solves: solve and utilize position location satellite to realize clock synchronization.

Technical scheme:

Satellite positioning module is extracted the clock synchronization implement device and is comprised satellite positioning module (101), serial ports output interface (102), pulse output interface (103), programmable circuit or ASIC circuit or processor (104), pulse output interface (105); Locating module (101) comprises GPS location time service module, Big Dipper location time service module, Galilean satellite location time service module, Russian GLONASS location time service module;

Programmable circuit or ASIC circuit (104) can adopt the FPGA of xilinx, Altera, Actel, Lattice company or CPLD programming to obtain; Also can adopt special-purpose asic chip to realize; Also can adopt processor, like 51 series processors, ARM series processors, PIC series processors;

Satellite positioning module (101) connects programmable circuit or ASIC circuit or processor (104) through serial ports output interface (102);

Satellite positioning module (101) connects programmable circuit or ASIC circuit or processor (104) through pulse output interface (103).

Satellite positioning module (101) connects programmable circuit or ASIC circuit or processor (104) through pulse output interface (103); Satellite positioning module (101) is a look-at-me through pulse output interface (103), when each pulse arrives, produces once and interrupts; Programmable circuit or ASIC circuit or processor (104) obtain the time signal of satellite positioning module (101) through serial ports output interface (102); The serial data of the renewal that in interruption, obtains through serial ports output interface (102) is exactly up-to-date lock in time, so just can obtain correct time.

The correct time that obtains can be applicable to communicate by letter each economize on electricity to the time, the measurement of the timing monitoring of electric power monitoring system, the gathering simultaneously of the data that guarantee respectively to economize on electricity.

Beneficial effect: the correct time that obtains can be applicable to communicate by letter each economize on electricity to the time, the measurement of the timing monitoring of electric power monitoring system, the gathering simultaneously of the data that guarantee respectively to economize on electricity.

Four, description of drawings

Fig. 1 satellite positioning module is extracted clock synchronization implement device theory diagram

Five, embodiment

Below in conjunction with accompanying drawing embodiment of the present invention is described in detail:

Preferred embodiment 1:

As shown in Figure 1, satellite positioning module is extracted the clock synchronization implement device and is comprised satellite positioning module (101), serial ports output interface (102), pulse output interface (103), programmable circuit or ASIC circuit or processor (104), pulse output interface (105); Locating module (101) comprises GPS location time service module, Big Dipper location time service module, Galilean satellite location time service module, Russian GLONASS location time service module;

Programmable circuit or ASIC circuit (104) can adopt the FPGA of xilinx, Altera, Actel, Lattice company or CPLD programming to obtain; Also can adopt special-purpose asic chip to realize; Also can adopt processor, like 51 series processors, ARM series processors, PIC series processors;

Satellite positioning module (101) connects programmable circuit or ASIC circuit or processor (104) through serial ports output interface (102);

Satellite positioning module (101) connects programmable circuit or ASIC circuit or processor (104) through pulse output interface (103).

Preferred embodiment 2:

Satellite positioning module (101) connects programmable circuit or ASIC circuit or processor (104) through pulse output interface (103); Satellite positioning module (101) is a look-at-me through pulse output interface (103), when each pulse arrives, produces once and interrupts; Programmable circuit or ASIC circuit or processor (104) obtain the time signal of satellite positioning module (101) through serial ports output interface (102); The serial data of the renewal that in interruption, obtains through serial ports output interface (102) is exactly up-to-date lock in time, so just can obtain correct time.

The correct time that obtains can be applicable to communicate by letter each economize on electricity to the time, the measurement of the timing monitoring of electric power monitoring system, the gathering simultaneously of the data that guarantee respectively to economize on electricity.

Though in conjunction with accompanying drawing embodiment of the present invention is described, those of ordinary skills can make various distortion or modification within the scope of the appended claims, the part in also can the design.

Claims (2)

1. satellite positioning module is extracted the clock synchronization implement device, it is characterized in that:

The star locating module extracts the clock synchronization implement device and comprises satellite positioning module (101), serial ports output interface (102), pulse output interface (103), programmable circuit or ASIC circuit or processor (104), pulse output interface (105); Locating module (101) comprises GPS location time service module, Big Dipper location time service module, Galilean satellite location time service module, Russian GLONASS location time service module;

Programmable circuit or ASIC circuit (104) can adopt the FPGA of xilinx, Altera, Actel, Lattice company or CPLD programming to obtain; Also can adopt special-purpose asic chip to realize; Also can adopt processor, like 51 series processors, ARM series processors, PIC series processors;

Satellite positioning module (101) connects programmable circuit or ASIC circuit or processor (104) through serial ports output interface (102);

Satellite positioning module (101) connects programmable circuit or ASIC circuit or processor (104) through pulse output interface (103).

2. satellite positioning module according to claim 1 is extracted the clock synchronization implement device, it is characterized in that:

Satellite positioning module (101) connects programmable circuit or ASIC circuit or processor (104) through pulse output interface (103); Satellite positioning module (101) is a look-at-me through pulse output interface (103), when each pulse arrives, produces once and interrupts; Programmable circuit or ASIC circuit or processor (104) obtain the time signal of satellite positioning module (101) through serial ports output interface (102); The serial data of the renewal that in interruption, obtains through serial ports output interface (102) is exactly up-to-date lock in time, so just can obtain correct time.

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