CN203148570U - Light speed anisotropy measuring device - Google Patents
Light speed anisotropy measuring device Download PDFInfo
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- CN203148570U CN203148570U CN 201320062876 CN201320062876U CN203148570U CN 203148570 U CN203148570 U CN 203148570U CN 201320062876 CN201320062876 CN 201320062876 CN 201320062876 U CN201320062876 U CN 201320062876U CN 203148570 U CN203148570 U CN 203148570U
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Abstract
The utility model relates to the space physics field, particularly relates to a light speed anisotropy measuring device which is related to special relativity. The light speed anisotropy measuring device includes a space cold atom clock system as well as a first microwave time frequency transmission system and a second microwave time frequency transmission system, wherein the space cold atom clock system is arranged on a mobile device in the outer space of the earth, and the first microwave time frequency transmission system and the second microwave time frequency transmission system are respectively arranged on the earth's surface of different geographical locations; and time signal transmission is performed between the space cold atom clock system and the first microwave time frequency transmission system as well as between the space cold atom clock system and the second microwave time frequency transmission system through electromagnetic waves. The light speed anisotropy measuring device of the utility model can verify whether the speed of light is identical or not in different retransmission direction more precisely.
Description
Technical field
The utility model relates to the Space Physics field, relates in particular to a kind of light velocity anisotropy measurement device relevant with special relativity.
Background technology
A ultimate principle of special relativity is exactly principle of constancy of light velocity, but has the theory of some relativities to think to be that the light velocity is not necessarily constant in some preferred coordinate.Test survey of deep space atomic clock comparison up till now and the test of observation two-photon absorption single order Doppler effect from Michelson-Mo Lei the earliest, all in the space anisotropy of attempting to seek the light velocity, these experiments are all understood light velocity unchangeability in different accuracy Shanghai Stock Exchange.
The utility model content
Technical problem to be solved in the utility model provides the anisotropic measurement mechanism of a kind of light velocity, and whether equally measuring light relays direction speed in difference on higher precision.
For solving the problems of the technologies described above, the utility model provides a kind of light velocity anisotropic measurement mechanism, it is characterized in that, comprises space cold atomic clock system, the first microwave time-frequency transmission system and the second microwave time-frequency transmission system,
Described space cold atomic clock system is positioned on the movable fixture of the earth external space,
The described first microwave time-frequency transmission system is positioned at earth surface; Pass through electromagnetic wave passing time signal between described space cold atomic clock system and the described first microwave time-frequency transmission system;
The described second microwave time-frequency transmission system and the described first microwave time-frequency transmission system are in diverse geographic location, pass through electromagnetic wave passing time signal between described space cold atomic clock and the described second microwave time-frequency transmission system.
As preferred scheme, the described first microwave time-frequency transmission system comprises first receiver and first external reference source, and first receiver and first external reference source are positioned at same geographic position; Described first receiver be used for receiving the described space cold atomic clock system reference time, and temporal frequency is compared uploading of data; Described first external reference source, be used to described first receiver provide accurate lock in time signal;
The described second microwave time-frequency transmission system comprises second receiver and second external reference source, and second receiver and second external reference source are positioned at same geographic position; Described second receiver be used for receiving the described space cold atomic clock system reference time, and temporal frequency is compared uploading of data; Described second external reference source, be used to described second receiver provide accurate lock in time signal.
The described first microwave time-frequency transmission system is a certain global position system ground receiving station, and the described second microwave time-frequency transmission system is another global position system ground receiving station.
The movable fixture of the described earth external space is geo-synchronous orbit satellite.
Whether the utility model can be relayed direction speed in difference at higher precision checking light the same.
Description of drawings
Below in conjunction with the drawings and specific embodiments the technical solution of the utility model is further described in detail.
Fig. 1 is the position relation of space cold atomic clock system and first, second microwave time-frequency transmission system and the transmission synoptic diagram of time frequency data.
Fig. 2 is the transmission synoptic diagram at the position of the space cold atomic clock system that satellite orbit moves and first, second microwave time-frequency transmission system that is positioned at face of land relation and time frequency data.
Embodiment
As shown in Figure 1, cold atomic clock system in space is positioned at the earth external space, and first, second microwave time-frequency transmission system lays respectively at the earth surface of diverse geographic location.The first microwave time-frequency transmission system comprises first receiver and first external reference source, and first receiver and first external reference source are positioned at same geographic position; First receiver is used for receiving the space cold atomic clock system reference time, and temporal frequency is compared uploading of data; First external reference source be used to first receiver provide accurate lock in time signal.In concrete enforcement, the first microwave time-frequency transmission system is a certain global position system ground receiving station.
The second microwave time-frequency transmission system comprises second receiver and second external reference source, and second receiver and second external reference source are positioned at same geographic position; Second receiver is used for receiving the space cold atomic clock system reference time, and temporal frequency is compared uploading of data; Second external reference source: for second receiver provide accurate lock in time signal.In concrete enforcement, the second microwave time-frequency transmission system is another global position system ground receiving station.
According to time signal transfer principle shown in Figure 1, first, second microwave time-frequency transmission system is synchronized to its first, second receiver on first, second external reference source of its this locality respectively.Then, the space atomic clock system is sent to first, second receiver self temporal frequency simultaneously in the electromagnetic wave mode.
If temporal frequency transmit both sides' receiver its separately external reference source synchronously down, the local reference time standard that obtains is respectively T1, T2, residual error is respectively L1, L2, local external reference source time and frequency standard is F1, F2, then have L1=L2=0 if receiver is synchronized to external reference source fully this moment.
Relational expression is arranged:
△T1=T1-T0 （1）
△T2=T2-T0 （2）
After using external reference source instead:
△T1=（F1-L1）-T0 （3）
△T2=（F2-L2）-T0 （4）
Further calculating has:
F1-F2=（△T1-△T2）+（L1-L2） （5）
If receiver is synchronized to external reference source fully, namely L1=L2=0 then has
F1-F2=△T1-△T2 （6）
The temporal frequency that formula (5), (6) are between first, second two places, microwave time-frequency transmission system place is transmitted deviate.
In conjunction with shown in Figure 2, cold atomic clock system in space is installed on the geo-synchronous orbit satellite, and first, second microwave time-frequency transmission system lays respectively at face of land diverse location 1,2.Measuring method of the present invention may further comprise the steps:
Step 1, when satellite 0 in the external space, space cold atomic clock system sends to first, second microwave time-frequency transmission system self temporal frequency in electromagnetic wave mode (being the light velocity), obtain to pass under the light velocity time quantum Ta, Tb respectively from described first, second microwave time-frequency transmission system;
Step 3, according to following formula:
|Tc-Ta|=|Δs1+Δm1+M1cosθ1| （7）
|Td-Tb|=|Δs2+Δm2+M2cosθ2| （8）
In the formula:
△ s1 represents described space cold atomic clock system and carries out temporal frequency when transmitting with described first, second microwave time-frequency transmission system simultaneously at 0 place, and the temporal frequency between first, second microwave time-frequency transmission system is transmitted deviation,
△ s2 represents described space cold atomic clock system and locates simultaneously to carry out temporal frequency when transmitting with described first, second microwave time-frequency transmission system 0 ', and the temporal frequency between first, second microwave time-frequency transmission system is transmitted deviation,
△ m1 represents the error of described space cold atomic clock system between from 0 point, 0 ' the described first microwave time-frequency transmission system being carried out respectively passing under the time signal and uploading,
△ m2 represents the error of described space cold atomic clock system between from 0 point, 0 ' the described second microwave time-frequency transmission system being carried out respectively passing under the time signal and uploading,
The unusual coordinate direction of the light velocity between the described space of θ 1 representative cold atomic clock system carries out respectively passing under the time signal and uploading to the described first microwave time-frequency transmission system from 0 point, 0 ' and side signal transmission to angle,
The unusual coordinate direction of the light velocity between the described space of θ 2 representative cold atomic clock system carries out respectively passing under the time signal and uploading to the described second microwave time-frequency transmission system from 0 point, 0 ' and side signal transmission to angle,
M1 is air-sensitive coefficient constant, its size and described space cold atomic clock system from 0 point, 0 ' point the described first microwave time-frequency transmission system is carried out respectively the light path that passes under the time signal and upload space gas density, temperature, humidity and the gaseous species of process relevant
M2 is air-sensitive coefficient constant, its size and described space cold atomic clock system from 0 point, 0 ' to the described second microwave time-frequency transmission system carry out respectively the light path that passes under the time signal and upload space gas density, temperature, humidity and the gaseous species of process relevant;
Above-mentioned △ s1, △ s2, θ 1, θ 2, △ m1, △ m2 can locate Service of Timing respectively via satellite, space clock transfer technology obtains; M1, M2 can obtain by atmospheric physics and space physics prior art respectively.And Ta, Tb, Tc, Td also can obtain by satnav Service of Timing shown in Figure 1.
Judge: when separately the equation left side and the error range between the right during all less than the theoretical error threshold value set in formula (7), (8), then prove the spatial isotropy of the light velocity, otherwise think the light velocity the space each to incorgruous.
Further, seek a suitable spatial point as 0 ' point, make Tc=Td, like this, simultaneous formula (7), (8) allow formula (7), (8) subtract each other respectively separately on the both sides of equal sign separately, if the error range between the resulting difference in both sides is during all less than the theoretical error threshold value set, then prove the spatial isotropy of the light velocity, otherwise think the light velocity the space each to incorgruous.
Be more preferably, " point; carry out the temporal frequency transmission with described first, second microwave time-frequency transmission system simultaneously obtains the formula similar with formula (7), formula (8), to the further checking of formula (7), formula (8) to make described space cold atomic clock system move to thirdly 0.
It should be noted last that, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (4)
1. the anisotropic measurement mechanism of the light velocity is characterized in that, comprises space cold atomic clock system, the first microwave time-frequency transmission system and the second microwave time-frequency transmission system,
Described space cold atomic clock system is positioned on the movable fixture of the earth external space,
The described first microwave time-frequency transmission system is positioned at earth surface; Pass through electromagnetic wave passing time signal between described space cold atomic clock system and the described first microwave time-frequency transmission system;
The described second microwave time-frequency transmission system and the described first microwave time-frequency transmission system are in diverse geographic location, pass through electromagnetic wave passing time signal between described space cold atomic clock and the described second microwave time-frequency transmission system.
2. the anisotropic measurement mechanism of the light velocity according to claim 1 is characterized in that, the described first microwave time-frequency transmission system comprises first receiver and first external reference source, and first receiver and first external reference source are positioned at same geographic position; Described first receiver be used for receiving the described space cold atomic clock system reference time, and temporal frequency is compared uploading of data; Described first external reference source, be used to described first receiver provide accurate lock in time signal;
The described second microwave time-frequency transmission system comprises second receiver and second external reference source, and second receiver and second external reference source are positioned at same geographic position; Described second receiver be used for receiving the described space cold atomic clock system reference time, and temporal frequency is compared uploading of data; Described second external reference source, be used to described second receiver provide accurate lock in time signal.
3. the anisotropic measurement mechanism of the light velocity according to claim 1, it is characterized in that, the described first microwave time-frequency transmission system is a certain global position system ground receiving station, and the described second microwave time-frequency transmission system is another global position system ground receiving station.
4. the anisotropic measurement mechanism of the light velocity according to claim 1 is characterized in that, the movable fixture of the described earth external space is geo-synchronous orbit satellite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201320062876 CN203148570U (en) | 2013-02-04 | 2013-02-04 | Light speed anisotropy measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320062876 CN203148570U (en) | 2013-02-04 | 2013-02-04 | Light speed anisotropy measuring device |
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| CN203148570U true CN203148570U (en) | 2013-08-21 |
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| CN 201320062876 Expired - Fee Related CN203148570U (en) | 2013-02-04 | 2013-02-04 | Light speed anisotropy measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110837219A (en) * | 2019-10-06 | 2020-02-25 | 中国计量科学研究院 | Virtual atomic clock system for monitoring entity atomic clock and working method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110837219A (en) * | 2019-10-06 | 2020-02-25 | 中国计量科学研究院 | Virtual atomic clock system for monitoring entity atomic clock and working method |
| CN110837219B (en) * | 2019-10-06 | 2022-04-05 | 中国计量科学研究院 | Virtual atomic clock system for monitoring entity atomic clock and working method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20160204 |