CN102809926B

CN102809926B - Astronomical telescope multichannel timing means

Info

Publication number: CN102809926B
Application number: CN201210270557.8A
Authority: CN
Inventors: 许占伟; 王歆
Original assignee: Purple Mountain Observatory of CAS
Current assignee: Purple Mountain Observatory of CAS
Priority date: 2012-07-31
Filing date: 2012-07-31
Publication date: 2017-07-04
Anticipated expiration: 2032-07-31
Also published as: CN102809926A

Abstract

Astronomical telescope multichannel timing means, by reference clock source, astronomical observation terminal, time distributior and computer are constituted, the astronomical observation terminal is made up of N number of sub- terminal, time distributior time module corresponding with N number of sub- terminal is constituted, each time module is provided with timing signal input end, triggering end and time signal output channel, the timing signal output of the reference clock source and the timing signal input end of each time module are connected, the triggering end connection of the synchronous signal output end of each sub- terminal and corresponding time module in the astronomical observation terminal, time signal output channel and the computer connection of each time module.The present invention can obtain multiple precise times from single clock source, and with terminal signaling synchronization, save funds, reduce fault rate, improve the stability of a system, improve maintainability.

Description

Astronomical telescope multichannel timing means

Technical field

The present invention relates to a kind of astronomical telescope multichannel timing means, it is by the use of GPS or triones navigation system as base Quasi- clock source, obtained the more accurate time, such as 0.1 Millisecond and higher using its second signal as timing signal input distributor, Simultaneously can be using the multi-terminal equipment of separate unit astronomical telescope or many Multi-path synchronous signals of unit/terminal astronomical telescope as touching Signal and be input into distributor with Asynchronous operation mode, the multichannel vernier time signal corresponding with Multi-path synchronous signal can be obtained Output.

Background technology

The accurate time is the extremely important parameter that astronomical observation needs, and time system is that astronomical telescope must not Part that can be less, therefore every astronomical telescope terminal is typically equipped with the time systems such as GPS to provide the accurate time. Some large aperture telescopes gradually change the function of single task role using the advantage of heavy caliber high light power itself, to multitask direction Development, it is desirable to equipped with plurality of devices terminal, can be worked using asynchronous system；Each terminal must possess independent time system System, multichannel accurate timing device can be provided and the synchronous time signal of multiple terminal data signals, and only per circuit-switched data Write a biography defeated；Multiple unit/terminal telescopes not far from one another can also obtain respective by multichannel timing means in same survey station The time signal of needs；The device can both save certain funds, reduce telescope fault rate, improve telescope working stability Property, also brought great convenience to plant maintenance.

The content of the invention

The present invention provides a kind of astronomical telescope multichannel timing means, and the device can provide multichannel for astronomical observation , synchronous vernier time signal.

Completing the technical scheme of foregoing invention task is：Astronomical telescope multichannel timing means, by reference clock source, day Literary observed terminals, time distributior and computer composition, the astronomical observation terminal are made up of N number of sub- terminal, each sub- terminal phase Isolated with photoisolator between mutually, time distributior time module composition corresponding with N number of sub- terminal, each time module Be provided with timing signal input end, triggering end and time signal output channel, the timing signal output of the reference clock source and Each time module timing signal input end connection, in the astronomical observation terminal synchronous signal output end of each sub- terminal and The triggering end connection of corresponding time module, time signal output channel and the computer connection of each time module.

As a further improvement on the present invention, the astronomical telescope multichannel accurate timing device is used to perform following step Suddenly：

Step 1 obtains GPS or triones navigation system time signal by reference clock source；

Step 2 using the time signal of GPS or triones navigation system as timing signal, input time distributor it is each when Between module；

Each sub- terminal of step 3 using respective synchronizing signal as trigger signal input time distributor corresponding time mould Block；

, when the triggering end of certain time module has trigger signal to be input into, the time module is with timing signal as base for step 4 Standard, and timing signal is subdivided into the more accurate time；

Step 5 time module will receive the precise time of trigger signal as time signal；

Each time module of step 6 packs respective time signal, using RS485/RS422 agreements serial ports packet mode Time signal bag is sent to computer by corresponding time signal output channel.

As a further improvement on the present invention, the time signal in the step 2 is second signal, by the second in the step 4 Signal is divided into 0.1 Millisecond or higher.

The device will obtain GPS or triones navigation system time signal as reference clock source, using its second signal as calmly When signal, second signal input time distributior, after the treatment of elapsed time distributor obtain astronomical observation in need more The accurate time, according to system requirements, can be as accurate as 0.1 Millisecond and higher；Meanwhile, in separate unit astronomical telescope When multiple terminals or many single terminals of telescope work, the synchronizing signal of output is input into as the triggering of time distributior, Only when the triggering input of terminal has signal, just the respective triggering input signal output of correspondence is corresponding accurate for time distributior Time signal, multiple terminals can be worked using asynchronous system, each independent；The time signal is exported to calculating with serial ports bag Machine, is worked using RS485/RS422 agreements, and strong antijamming capability can be in Distance Transmission more long.

Brief description of the drawings

Fig. 1 is the structured flowchart of the embodiment of the present invention 1.

Specific embodiment

Embodiment 1, astronomical telescope multichannel timing means, reference picture 1, by reference clock source 1, astronomical observation terminal 2, Time distributior 3 and computer 4 are constituted, and astronomical observation terminal 2 is by the first sub- terminal 21a, the second sub- terminal 21b ... n-ths Sub- terminal 21n composition, time distributior 3 is by very first time module 31a corresponding with N number of sub- terminal, the second time module 31b ... N time modules 31n is constituted, and each time module is provided with timing signal input end 311, triggering end 312 and time Signal output channels 313.The timing signal input end 311 of reference clock source timing signal output 11 and each time module connects Connect, the triggering of synchronous signal output end 22a, 22b ... 22n and corresponding time module of each sub- terminal 21a, 21b ... 21n End 312 is connected, and the time signal output channel 313 and computer 4 of each time module are connected.

Follow the steps below：

Step 1 obtains GPS or triones navigation system time signal by reference clock source 1；

The sub- terminal 21a of step 2 first, the second sub- sub- terminal of terminal 21b ... n-ths are by GPS or triones navigation system Second, signal was used as timing signal, each time module of input time distributor 3；

Step 3 using respective synchronizing signal as trigger signal input time distributor very first time module 31a, second Time module 31b ... N time modules 31n；

Step 4 works as certain time module, such as when the triggering end 312 of very first time module 31a has trigger signal to be input into, the Second signal is subdivided into the more accurate time by one time time module 31a on the basis of second signal, according to system requirements, Can be as accurate as 0.1 Millisecond and higher；

Precise time when step 5 very first time module 31a time modules will receive trigger signal is used as time signal. The mode that other time module 31b, 31c ... ..31n obtains time signal is identical with very first time module 1a, repeats no more.

Each time module of step 6 packs respective time signal, using RS485/RS422 agreements serial ports packet mode Time signal bag is sent to computer 4 by corresponding time signal output channel 313.

Claims

1. astronomical telescope multichannel timing means, it is characterized in that, the timing means by reference clock source, astronomical observation terminal, Time distributior and computer are constituted, and the astronomical observation terminal is made up of N number of sub- terminal, the time distributior by with it is N number of The corresponding time module composition of sub- terminal, each time module is provided with the output of timing signal input end, triggering end and time signal Passage, the timing signal output of the reference clock source and the timing signal input end of each time module are connected, the day The triggering end connection of the synchronous signal output end of each sub- terminal and corresponding time module in literary observed terminals, each time module Time signal output channel and computer are connected.

2. astronomical telescope multichannel timing means according to claim 1, it is characterized in that, the astronomical telescope leads to more Road accurate timing device is used to perform the following steps：

Step 2 is using the time signal of GPS or triones navigation system as timing signal, each time mould of input time distributor Block；

Each sub- terminal of step 3 using respective synchronizing signal as trigger signal input time distributor corresponding time module；

Step 4 when the triggering end of certain time module has trigger signal to be input into, the time module on the basis of timing signal, and Timing signal is subdivided into the more accurate time；

Each time module of step 6 packs respective time signal, using RS485/RS422 agreements with serial ports packet mode by when Between signal bag sent to computer by corresponding time signal output channel.

3. astronomical telescope multichannel timing means according to claim 2, it is characterized in that, the timing in the step 2 Signal is second signal, and second signal is subdivided into 0.1 Millisecond or higher in the step 4.