CN204945644U - A kind of long gas pipe line distributed monitoring inertia time dissemination system - Google Patents
A kind of long gas pipe line distributed monitoring inertia time dissemination system Download PDFInfo
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- CN204945644U CN204945644U CN201520646870.6U CN201520646870U CN204945644U CN 204945644 U CN204945644 U CN 204945644U CN 201520646870 U CN201520646870 U CN 201520646870U CN 204945644 U CN204945644 U CN 204945644U
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Abstract
The utility model discloses a kind of long gas pipe line distributed monitoring inertia time dissemination system, add GPS time dissemination system (being made up of gps antenna, GPS, central processing unit) and High Accuracy Clock (being made up of central processing unit and high precision temp apotype crystal oscillator) in systems in which simultaneously.The time service task of GPS time dissemination system in malfunction situation is made up with High Accuracy Clock.When gps system normally works, time service is carried out with gps system, if gps system affects by weather, magnetic field of the earth cause time service entanglement or cannot time service, inertia time service is done, task of uniting when ensure that long gas pipe line distributed monitoring can complete continual high precision in any external interference situation with high precision clock.
Description
Technical field
The utility model relates to long gas pipe line distributed monitoring technical field, particularly relates to a kind of long gas pipe line distributed monitoring inertia time dissemination system.
Background technology
At present, at the time dissemination system that long gas pipe line distributed monitoring technical field uses, mostly be GPS time dissemination system, the fundamental purpose of GPS time dissemination system is in order to the alignment time.
GPS time dissemination system is the high-tech product be calibrated for the computing machine in automated system, control system etc.; GPS time service product obtains the time signal of standard from gps satellite; these information are transferred in automated system the equipment (computing machine, protection system, fault oscillograph, event sequence recording system, safety automation system etc.) needing temporal information by various interface type, so just can reach the time synchronized of whole system.
But, the schemes tend of this GPS time service be limited to weather, the external condition impacts such as magnetic field of the earth, time service entanglement for the moment or cannot time service can be caused, not accomplish real-time time service.
Utility model content
Rely on GPS time service to be subject to the factor impact such as weather, magnetic field of the earth to overcome, the utility model provides a kind of long gas pipe line distributed monitoring inertia time dissemination system, and it improves based on GPS time service and inertia time service.This time dissemination system not only solves the impact that GPS time service is subject to weather, magnetic field of the earth to greatest extent, and time service precision meets the demand of long gas pipe line safety monitoring system.
For solving the problems of the technologies described above, the utility model provides a kind of long gas pipe line distributed monitoring inertia time dissemination system, comprising: gps antenna, GPS, central processing unit and high precision temp apotype crystal oscillator; Wherein, described gps antenna is connected with described GPS, and the electromagnetism wave energy of satellite-signal is converted to corresponding electric current by described gps antenna, and is transferred to described GPS; Described GPS is connected with described central processing unit, and described GPS sends the electric current of at least 4 satellites received to described central processing unit, and obtains gps time by described central processing unit analytic operation, and then carries out GPS time service; Described central processing unit is connected with described high precision temp apotype crystal oscillator, when described GPS time service receives ectocine, described high precision temp apotype crystal oscillator connects generation reference clock signal and is transferred to described central processing unit, and described central processing unit carries out inertia time service by pre-scaling down processing clocking.
Preferably, the transmit port T of described GPS is connected with the serial ports receiving interface RXD0 of described central processing unit, and communication baud rate is 4800b/s; The port P of described GPS is connected with the INT4 port of described central processing unit.
Preferably, the OUT pin of described high precision temp apotype crystal oscillator is connected with the XTAL1 of described central processing unit.
Preferably, described system also comprises: peripheral match circuit.
By one or more technical scheme of the present utility model, the utility model has following beneficial effect or advantage:
The utility model provides a kind of long gas pipe line distributed monitoring inertia time dissemination system, adds GPS time dissemination system (being made up of gps antenna, GPS, central processing unit) and High Accuracy Clock (being made up of central processing unit and high precision temp apotype crystal oscillator) in systems in which simultaneously.The time service task of GPS time dissemination system in malfunction situation is made up with High Accuracy Clock.When gps system normally works, time service is carried out with gps system, if gps system by weather, magnetic field of the earth affect cause time service entanglement or cannot time service time, inertia time service is done, task of uniting when ensure that long gas pipe line distributed monitoring can complete continual high precision in any external interference situation with high precision clock.
Accompanying drawing explanation
The module diagram of a kind of long gas pipe line distributed monitoring inertia time dissemination system that Fig. 1 provides for the utility model embodiment;
The one long gas pipe line distributed monitoring inertia time dissemination system workflow diagram that Fig. 2 provides for the utility model embodiment;
The circuit connection diagram of a kind of long gas pipe line distributed monitoring inertia time dissemination system that Fig. 3 provides for the utility model embodiment.
Description of reference numerals: gps antenna 1, GPS 2, central processing unit 3, high precision temp apotype crystal oscillator 4, peripheral match circuit 5.
Embodiment
The utility model provides a kind of long gas pipe line distributed monitoring inertia time dissemination system, adds GPS time dissemination system (being made up of gps antenna 1, GPS 2, central processing unit 3) and High Accuracy Clock (being made up of central processing unit 3 and high precision temp apotype crystal oscillator 4) in systems in which simultaneously.The time service task of GPS time dissemination system in malfunction situation is made up with High Accuracy Clock.When gps system normally works, time service is carried out with gps system, if gps system by weather, magnetic field of the earth affect cause time service entanglement or cannot time service time, inertia time service is done, task of uniting when ensure that long gas pipe line distributed monitoring can complete continual high precision in any external interference situation with high precision clock.
In order to make the utility model the technical staff in the technical field more clearly understand the utility model, below in conjunction with accompanying drawing, by specific embodiment, technical solutions of the utility model are described in detail.
See Fig. 1, the one that the utility model embodiment provides long gas pipe line distributed monitoring inertia time dissemination system, comprising: gps antenna 1, GPS 2, central processing unit 3, high precision temp apotype crystal oscillator 4, peripheral match circuit 5.
Introduce the enforcement principle of this system below:
Described gps antenna 1 is connected with described GPS 2, and the electromagnetism wave energy of satellite-signal is converted to corresponding electric current by described gps antenna 1, and is transferred to described GPS 2; Described GPS 2 is connected with described central processing unit 3, and described GPS 2 sends the electric current of at least 4 satellites received to described central processing unit 3, and obtains gps time by described central processing unit 3 analytic operation, and then carries out GPS time service; Described central processing unit 3 is connected with described high precision temp apotype crystal oscillator 4, when described GPS time service receives ectocine, described high precision temp apotype crystal oscillator 4 connects generation reference clock signal and is transferred to described central processing unit 3, and described central processing unit 3 carries out inertia time service by pre-scaling down processing clocking.
First, gps antenna 1 is arranged on outdoor spacious unobstructed position, to receive sky gps signal better, the effect of gps antenna 1 is that atomic for satellite-signal weak electromagnetism wave energy is converted into corresponding electric current.The signal wire of gps antenna 1 is connected with GPS 2, and GPS 2 is connected with the serial ports of central processing unit 3.GPS 2 must receive the signal of at least 4 nautical stars, calculates the three-dimensional position at oneself place, then receives 1 satellite-signal, just can accurately time service.
System of the present utility model also adopts high precision temp apotype crystal oscillator 4, this crystal oscillator and external matching circuit co-operation, produce stable reference clock signal, when gps system by weather, magnetic field of the earth affect cause time service entanglement or cannot time service, inertia time service can be carried out by high precision temp apotype crystal oscillator 4 and peripheral match circuit 5.
Native system workflow diagram is as shown in Figure 2:
S1, utilizes the initial time service of GS.
S2, judges GPS state.
If OK, namely represent GPS in good condition, proceed to S3: use GPS time service.
If NO, namely represent GPS and be interfered, proceed to S4: use clock time service.
In sum, when system electrification works, first carry out the initial time service of GPS, if GPS is normal, then continues GPS time service, if GPS state is abnormal, carry out clock time service (that is: inertia time service).
Please refer to Fig. 3 below, is the connection diagram of the inertia time dissemination system in the utility model.
GPS 2 is carried out gps data with central processing unit 3 by serial ports and is communicated, and the transmit port T of GPS 2 is connected with the serial ports receiving port RXD0 of central processing unit 3.Its communication baud rate 4800b/s, the data that central processing unit 3 sends over by resolving GPS, determine GPS state, and obtain gps time.The port P of GPS 2 produces pulse per second (PPS) (PPM), and it is connected with the INT4 port of central processing unit 3, and central processing unit 3, according to the pulse per second (PPS) received, carries out gps time Data Analysis.When GPS time service, the signal of at least 4 nautical stars must be received, calculate the three-dimensional position at oneself place, then receive 1 satellite-signal, just can accurately time service.But during or condition that weather condition severe quick-fried at earth magnetic, gps signal can be abnormal, at this moment just needs to carry out time service with high-precision clock.
High precision clock is made up of high precision temp apotype crystal oscillator 4 and central processing unit 3.The OUT pin of the active crystal oscillator of high precision temperature compensation is connected with the XTAL1 of central processing unit 3, for it provides reference frequency.First central processing unit 3 by inner pre-scaling down processing, produces the clock signal of high precision, in the abnormal situation of GPS state, completes time service task.
By one or more technical scheme of the present utility model, the utility model has following beneficial effect or advantage:
The utility model provides a kind of long gas pipe line distributed monitoring inertia time dissemination system, adds GPS time dissemination system (being made up of gps antenna, GPS, central processing unit) and High Accuracy Clock (being made up of central processing unit and high precision temp apotype crystal oscillator) in systems in which simultaneously.The time service task of GPS time dissemination system in malfunction situation is made up with High Accuracy Clock.When gps system normally works, time service is carried out with gps system, if gps system by weather, magnetic field of the earth affect cause time service entanglement or cannot time service time, inertia time service is done, task of uniting when ensure that long gas pipe line distributed monitoring can complete continual high precision in any external interference situation with high precision clock.
Although described preferred embodiment of the present utility model, one of ordinary skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the utility model scope.
Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.
Claims (4)
1. a long gas pipe line distributed monitoring inertia time dissemination system, is characterized in that, comprising: gps antenna, GPS, central processing unit and high precision temp apotype crystal oscillator;
Wherein, described gps antenna is connected with described GPS, and the electromagnetism wave energy of satellite-signal is converted to corresponding electric current by described gps antenna, and is transferred to described GPS;
Described GPS is connected with described central processing unit, and described GPS sends the electric current of at least 4 satellites received to described central processing unit, and obtains gps time by described central processing unit analytic operation, and then carries out GPS time service;
Described central processing unit is connected with described high precision temp apotype crystal oscillator, when described GPS time service receives ectocine, described high precision temp apotype crystal oscillator connects generation reference clock signal and is transferred to described central processing unit, and described central processing unit carries out inertia time service by pre-scaling down processing clocking.
2. inertia time dissemination system as claimed in claim 1, is characterized in that,
The transmit port T of described GPS is connected with the serial ports receiving interface RXD0 of described central processing unit, and communication baud rate is 4800b/s;
The port P of described GPS is connected with the INT4 port of described central processing unit.
3. inertia time dissemination system as claimed in claim 1, is characterized in that,
The OUT pin of described high precision temp apotype crystal oscillator is connected with the XTAL1 of described central processing unit.
4. inertia time dissemination system as claimed in claim 1, it is characterized in that, described system also comprises:
Peripheral match circuit.
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| CN201520646870.6U CN204945644U (en) | 2015-08-25 | 2015-08-25 | A kind of long gas pipe line distributed monitoring inertia time dissemination system |
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| CN201520646870.6U CN204945644U (en) | 2015-08-25 | 2015-08-25 | A kind of long gas pipe line distributed monitoring inertia time dissemination system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112179362A (en) * | 2019-07-03 | 2021-01-05 | 深动科技（北京）有限公司 | High-precision map data acquisition system and acquisition method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112179362A (en) * | 2019-07-03 | 2021-01-05 | 深动科技（北京）有限公司 | High-precision map data acquisition system and acquisition method |
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Effective date of registration: 20211112 Address after: Room 08-10, 6 / F, block a, No. 5, Dongtucheng Road, Chaoyang District, Beijing 100013 Patentee after: National Petroleum and natural gas pipeline network Group Co., Ltd Address before: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee before: PetroChina Co Ltd |