CN202075347U - Loop oscillation period measure equipment used for atom frequency mark - Google Patents
Loop oscillation period measure equipment used for atom frequency mark Download PDFInfo
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- CN202075347U CN202075347U CN2011201852759U CN201120185275U CN202075347U CN 202075347 U CN202075347 U CN 202075347U CN 2011201852759 U CN2011201852759 U CN 2011201852759U CN 201120185275 U CN201120185275 U CN 201120185275U CN 202075347 U CN202075347 U CN 202075347U
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Abstract
The utility model discloses loop oscillation period measure equipment used for an atom frequency mark. The equipment includes the following: an oscillation module, which is used for receiving output signals of the servo loop of the atom frequency mark, transforming the output signals of the servo loop of the atom frequency mark to anti-phase signals, and outputting the anti-phase signals; an execution module, which works according to the output signals of the oscillation module to control whether the quantum system of the atom frequency mark finishes quantum frequency discrimination; and a signal detection module, which is used to detect the oscillation period of the oscillation loop according to the output signals of the oscillation module, and the oscillation loop comprises the oscillation module, the execution module and the atom frequency mark. According to the equipment provided in the utility model, loop response time of the atom frequency mark system can be accurately measured.
Description
Technical field
The utility model relates to the electronic surveying field, particularly a kind of loop oscillation period measurement equipment that is used for atomic frequency standard.
Background technology
At present, the passive-type atomic frequency standard is widely used in fields such as communication in the time synchronized source accurately as high stable, height.Referring to Fig. 1, the servo control loop of passive-type atomic frequency standard generally is made up of quantized system (claiming physical system again) and Circuits System.Wherein, quantized system provides a peak dot frequency stabilization, the narrower atomic resonance of live width to absorb line as frequency reference, plays the quantum frequency discriminator; Circuits System is locked in the output frequency of VCXO (Voltage Controled X ' tal Oscillator, VCXO) on the peak dot of atomic resonance absorption line.The basic functional principle of passive-type atomic frequency standard is, the output signal of VCXO is through frequency multiplication and comprehensive, after the mixing of microwave frequency multiplication, obtain a microwave interrogation signals again, this microwave interrogation signals input quantity subsystem, quantized system is carried out frequency discrimination to this microwave interrogation signals, obtain the frequency discrimination signal on photoelectric cell, this frequency discrimination signal carries out after through the voltage that obtains rectifying a deviation after processing of servo loop voltage-controlled to VCXO, absorbs on the peak dot of line thereby the output frequency of VCXO is locked onto atomic resonance.
In realizing process of the present utility model, the inventor finds that there is following problem at least in prior art:
In the servo control loop of passive-type atomic frequency standard, the phase-sensitive detector (PSD) in quantized system, VCXO and the servo loop etc. all has nonlinear characteristic, and loop analysis is very complicated, and the loop response time of total system is difficult to analyze more.Wherein, the relaxation time of quantized system reality has limited the loop response time of total system to a great extent, add the phase problem of each circuit module, bring very big inconvenience for the output of collection of servo loop error signal and corresponding correction voltage, as shown in Figure 2, because the relaxation time of quantized system and the phase differential of circuit, cause servo loop truly to gather the pressure reduction that quantum frequency discrimination signal X is ordered at A point and B according to corresponding synchronous reference signal Y.
The utility model content
In order to measure the loop response time of atomic frequency standard system, the utility model embodiment provides a kind of loop oscillation period measurement equipment that is used for atomic frequency standard.Described technical scheme is as follows:
A kind of loop oscillation period measurement equipment that is used for atomic frequency standard comprises:
Be used for the oscillation module that links to each other with the output terminal of the servo loop of atomic frequency standard, described oscillation module receives the output signal of the servo loop of described atomic frequency standard, and with the output signal anti-phase back output of the servo loop of described atomic frequency standard;
With the execution module that the output terminal of described oscillation module links to each other, can described execution module finish the quantum frequency discrimination according to the output signal action of described oscillation module with the quantized system of controlling described atomic frequency standard; And
The signal detection module that links to each other with the output terminal of described oscillation module, the oscillation period that described signal detection module is measured oscillating loop according to the output signal of described oscillation module, described oscillating loop is made of described oscillation module, described execution module and described atomic frequency standard.
Particularly, described oscillation module is a ring oscillator.
Particularly, described ring oscillator is made of the odd number not gate and described not gate is at least 3.
Wherein, the servo loop of described atomic frequency standard comprises programmable logic chip, and described ring oscillator is produced by described programmable logic chip.
Particularly, described execution module is the shutter Shutter between spectrum lamp and the integrated filtering resonance bubble in described quantized system.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is: by oscillation module, execution module, constitute oscillating loop with atomic frequency standard, thereby can measure by signal detection module the oscillation period of this oscillating loop, and then can accurately measure the loop response time of atomic frequency standard.According to the processing of loop response time that records and relevant comprehensive module, servo loop can very accurately be gathered pressure difference signal on the one hand; On the other hand, by the loop response time of measuring, we can to its concrete accurately being provided with such as circuit parameters such as sampling time, sampling number, unit interval (as 10S) correction number of times, and then further improve the precision of atomic frequency standard when servo loop carries out the quantum correction.
Description of drawings
Fig. 1 is the structured flowchart of passive-type atomic frequency standard;
Fig. 2 is the servo collection figure of servo loop when synchronous phase demodulation of existing atomic frequency standard;
Fig. 3 is a kind of structural representation that is used for the loop oscillation period measurement equipment of atomic frequency standard that the utility model embodiment 1 provides;
Fig. 4 is a kind of structure and user mode synoptic diagram that is used for the loop oscillation period measurement equipment of atomic frequency standard that the utility model embodiment 2 provides;
Fig. 5 is the fundamental diagram of the oscillation module among the utility model embodiment 2;
Fig. 6 is the fundamental diagram of the oscillating loop among the utility model embodiment 2;
The servo collection figure that Fig. 7 is the servo loop that adopts atomic frequency standard behind the utility model embodiment when phase demodulation synchronously.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, the utility model embodiment is described in further detail below in conjunction with accompanying drawing.For ease of description, at first the passive-type atomic frequency standard is introduced below equipment described in the utility model.
Usually, the passive-type atomic frequency standard is in the servo control loop locking process, and quantized system, phase-sensitive detector (PSD), voltage controlled oscillator etc. all show nonlinear characteristic.And behind loop-locking, each parts all only is operated near the very little linear zone of centre frequency, therefore can be with its linearization, promptly whole atomic frequency standard quantum frequency discrimination (physical process) each time can be regarded as constant to the closed loop procedure of servo correction (circuit response).Based on this, the utility model provides a kind of loop oscillation period measurement equipment that is used for atomic frequency standard.
The utility model embodiment provides a kind of loop oscillation period measurement equipment that is used for atomic frequency standard, and as shown in Figure 3, this equipment comprises oscillation module 101, execution module 102 and signal detection module 103.Wherein, the input end of described oscillation module 101 links to each other with the servo loop of atomic frequency standard 104, is used to receive the output signal of the servo loop 104 of described atomic frequency standard, and with the output signal anti-phase back output of the servo loop 104 of described atomic frequency standard; Can described execution module 102 links to each other with the output terminal of described oscillation module 101, is used for the output signal action according to described oscillation module 101, finish the quantum frequency discrimination with the quantized system 105 of controlling described atomic frequency standard; Described signal detection module 103 links to each other with the output terminal of described oscillation module 101, be used for output signal according to described oscillation module 101, measure the oscillation period of oscillating loop, described oscillating loop is made of described oscillation module 101, described execution module 102 and described atomic frequency standard.Thick arrow among Fig. 3 is represented the input and output of signal respectively.
The loop oscillation period measurement equipment of present embodiment passes through oscillation module, execution module, constitutes oscillating loop with atomic frequency standard, thereby can measure the oscillation period of this oscillating loop by signal detection module, according to the oscillation period of the oscillating loop that records and the loop response time that can calculate atomic frequency standard oscillation period of oscillation module 101.As shown in Figure 7, according to the processing of loop response time that records and relevant comprehensive module, servo loop can be very accurately gathered A among the respective signal X, the pressure difference signal of B respectively according to the point of the D among the synchronous reference signal Y on the one hand; On the other hand, by the loop response time of measuring, we can to its concrete accurately being provided with such as circuit parameters such as sampling time, sampling number, unit interval (as 10S) correction number of times, and then further improve the precision of atomic frequency standard when servo loop carries out the quantum correction.
Embodiment 2
The utility model embodiment provides a kind of loop oscillation period measurement equipment that is used for atomic frequency standard, as shown in Figure 4, in the present embodiment, described atomic frequency standard comprises voltage-controlled crystal (oscillator) local oscillator 204, electronic circuit 205, programmable logic chip 206, quantized system 207 and servo loop 208, described quantized system 207 comprises spectrum lamp 2071 at least, integrated filtering resonance bubble 2072, magnetic cup 2073, constant temperature 2074 and chamber 2075, above-mentioned parts is finished the work of a station symbol quasiatom frequency marking, its principle of work is identical with traditional atomic frequency standard principle, this knows for those skilled in the art, so omit detailed description at this.Need to prove that in the present embodiment, described programmable logic chip 206 is parts of servo loop 208, for convenience of explanation it is independently represented.
The loop oscillation period measurement equipment of present embodiment comprises oscillation module 201, execution module 202 and signal detection module 203.Wherein, referring to Fig. 4, the input end of oscillation module 201 links to each other with the servo loop of atomic frequency standard 208, receive the output signal of servo loop 208, the output terminal of oscillation module 201 links to each other with signal detection module 203 with execution module 202, and this oscillation module 201 is used for being sent to execution module 202 and signal detection module 203 after the signal inversion with servo loop 208.Can described execution module 202 links to each other with the output terminal of oscillation module 201, is used for the output signal action according to oscillation module 201, finish the quantum frequency discrimination with the quantized system 207 of controlling described atomic frequency standard.Described signal detection module 203 links to each other with the output terminal of oscillation module 201, be used to receive the output signal of oscillation module 201, according to the oscillation period that this output signal is measured oscillating loop, this oscillating loop is made of described oscillation module 201, execution module 202 and described atomic frequency standard.
Particularly, in the present embodiment, oscillation module 201 is the ring oscillators that are made of odd number (more than 3) not gate.In the present embodiment, the odd number not gate is produced by programmable logic chip 206.If the number of not gate is N, N is not less than 3.This execution module 202 is the high-speed shutter Shutter between spectrum lamp 2071 and the integrated filtering resonance bubble 2072 in the quantized system 207 of atomic frequency standard.Its input end links to each other with oscillation module 201 output terminals, receive the output signal of oscillation module 201, and according to the signal open and close that receives, thereby can the exciting light of control spectrum lamp 2071 see through integrated filtering resonance bubble 2072, and promptly can the controlled quentity controlled variable subsystem finish the quantum frequency discrimination.
Describe the principle of work of present embodiment in detail below in conjunction with Fig. 4-6.Under the effect of traditional atomic frequency standard principle, the light of spectrum lamp 2071 excitations enters in the integrated resonance optical filtering bubble 2072 in the quantized system 207, the quantum frequency discrimination of performance subsystem 207, the quantum frequency discrimination signal that obtains obtains synchronous phase discrimination signal behind servo loop 208, phase discrimination signal feeds back to the voltage-controlled signal that programmable logic chip 206 obtains voltage-controlled crystal (oscillator) local oscillator 204 synchronously.
The state of supposing shutter Shutter this moment is ' opening ', the integrated resonance that the light of spectrum lamp 2071 excitation directly enters after by shutter Shutter filters in the bubble 2072, the quantum frequency discrimination of performance subsystem 207, the quantum frequency discrimination signal that obtains feeds back to programmable logic chip 206 on the one hand as mentioned above through the signal that servo loop 208 obtains, feed back to oscillation module 201 on the other hand, because quantized system 207 has been finished the quantum frequency discrimination, so the time input to oscillation module 201 through servo loop 208 signal be high level ' 1 ', the a plurality of non-low levels ' 0 ' that become behind the door of this signal odd level in oscillation module 201, therefore, oscillation module 201 exports execution module 202 to and signal detection module 203 is low level ' 0 ', act on execution module 202, be shutter Shutter, make its state become ' pass ', at this moment, the quantum frequency discrimination of quantized system 207 can not be finished, the signal that servo loop 208 inputs to oscillation module 201 is a low level ' 0 ', the a plurality of non-high level ' 1 ' that become behind the door of this signal odd level in oscillation module 201, act on shutter Shutter, make its state become ' opening ' once more.Circulation successively, the signal of oscillation module 201 outputs can occur ' 1 '-' 0 '-' 1 ' ... ' 0 ' variation.
As mentioned above, oscillation module 201, execution module 202 have constituted an oscillating loop with the servo loop 208 and the quantized system 207 of atomic frequency standard.Can measure the oscillation period of this loop circuit that shakes by signal detection module 203.
In addition, as previously mentioned, N the not gate that programmable logic chip 206 produces can constitute a ring oscillator.The exportable signal in any one position is to signal detection module 203 in this ring oscillator loop, and signal detection module 203 receives this output signal, the cycle oscillator of measure annular oscillator.The average transfer delay time of each not circuit is t in the hypothesis loop, and be T the oscillation period that ring oscillator produces
0Referring to Fig. 5, in the ring oscillator, not gate A
1Output connects not gate A
2Input, not gate A
2Output connects not gate A
3Input ..., not gate A
N-1Output connects not gate A
NInput, not gate A
NOutput connects not gate A
1Input.Suppose certain A constantly
1The initial state of input is 1, then through behind 1 transmission delay t, and A
1Output is A
2Input becomes 0; Again through 1 transmission delay t, A
2Output is A
2Input becomes 1 ..., behind (N-1) individual transmission delay (N-1) t, A
N-1Output A
NInput becomes 1, again through 1 transmission delay t, A
NOutput is A
1Input becomes 0.Promptly need pass through transmission delay Nt as can be known, the initial state ' 1 ' of ring oscillator becomes ' 0 '.Same reason as can be known, the initial state ' 0 ' of ring oscillator becomes ' 1 ', also needs transmission delay
NtSo, can derive the period T of ring oscillator
0For:
T
0＝2Nt
Referring to Fig. 6, suppose that the atomic frequency standard loop response time is
Δ t, be T the oscillation period of oscillating loop
1So, can derive T oscillation period of oscillating loop
1For:
T
1＝2Nt+2Δt
Then can derive the loop response time of atomic frequency standard
Δ t:
Need to prove that in the present embodiment, described oscillation module 201 is a ring oscillator, this ring oscillator is produced by programmable logic chip 206, yet, be not limited to this kind mode.Described programmable logic chip 206 can be substituted by single-chip microcomputer, and described oscillation module can be for being obtained by the series connection of N rank not gate.
The loop oscillation period measurement equipment that is used for atomic frequency standard of present embodiment passes through oscillation module, execution module, constitutes oscillating loop with atomic frequency standard, thereby can measure by signal detection module the oscillation period of this oscillating loop, and then can accurately measure the loop response time of atomic frequency standard.As shown in Figure 7, according to the processing of loop response time that records and relevant comprehensive module, servo loop can be very accurately gathered A among the respective signal X, the pressure difference signal of B respectively according to the point of the D among the synchronous reference signal Y on the one hand; On the other hand, by the loop response time of measuring, we can to its concrete accurately being provided with such as circuit parameters such as sampling time, sampling number, unit interval (as 10S) correction number of times, and then further improve the precision of atomic frequency standard when servo loop carries out the quantum correction.
All or part of content in the technical scheme that above embodiment provides can realize that its software program is stored in the storage medium that can read by software programming, storage medium for example: the hard disk in the computing machine, CD or floppy disk.
The above only is preferred embodiment of the present utility model, and is in order to restriction the utility model, not all within spirit of the present utility model and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. loop oscillation period measurement equipment that is used for atomic frequency standard is characterized in that described equipment comprises:
Be used for the oscillation module that links to each other with the output terminal of the servo loop of atomic frequency standard, described oscillation module receives the output signal of the servo loop of described atomic frequency standard, and with the output signal anti-phase back output of the servo loop of described atomic frequency standard;
With the execution module that the output terminal of described oscillation module links to each other, can described execution module finish the quantum frequency discrimination according to the output signal action of described oscillation module with the quantized system of controlling described atomic frequency standard; And
The signal detection module that links to each other with the output terminal of described oscillation module, the oscillation period that described signal detection module is measured oscillating loop according to the output signal of described oscillation module, described oscillating loop is made of described oscillation module, described execution module and described atomic frequency standard.
2. loop oscillation period measurement equipment as claimed in claim 1 is characterized in that described oscillation module is a ring oscillator.
3. loop oscillation period measurement equipment as claimed in claim 2 is characterized in that, described ring oscillator is made of the odd number not gate and described not gate is at least 3.
4. loop oscillation period measurement equipment as claimed in claim 3 is characterized in that the servo loop of described atomic frequency standard comprises programmable logic chip, and described ring oscillator is produced by described programmable logic chip.
5. as each described loop oscillation period measurement equipment of claim 1-4, it is characterized in that described execution module is the shutter Shutter between spectrum lamp and the integrated filtering resonance bubble in described quantized system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201852759U CN202075347U (en) | 2011-06-02 | 2011-06-02 | Loop oscillation period measure equipment used for atom frequency mark |
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| CN2011201852759U CN202075347U (en) | 2011-06-02 | 2011-06-02 | Loop oscillation period measure equipment used for atom frequency mark |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291134A (en) * | 2011-06-02 | 2011-12-21 | 江汉大学 | Loop response time measuring device and method used for atomic frequency standard |
| CN104410415A (en) * | 2014-11-27 | 2015-03-11 | 江汉大学 | Improved passive atomic frequency scale |
| CN104410410A (en) * | 2014-11-27 | 2015-03-11 | 江汉大学 | Pulse signal source device |
| CN104811197A (en) * | 2015-03-30 | 2015-07-29 | 江汉大学 | Synchronous phase discrimination method and atomic frequency standard |
| CN107272394A (en) * | 2017-06-16 | 2017-10-20 | 江汉大学 | A kind of integrated resonant time dissemination system calibration method of backup formula |
-
2011
- 2011-06-02 CN CN2011201852759U patent/CN202075347U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291134A (en) * | 2011-06-02 | 2011-12-21 | 江汉大学 | Loop response time measuring device and method used for atomic frequency standard |
| CN104410415A (en) * | 2014-11-27 | 2015-03-11 | 江汉大学 | Improved passive atomic frequency scale |
| CN104410410A (en) * | 2014-11-27 | 2015-03-11 | 江汉大学 | Pulse signal source device |
| CN104410410B (en) * | 2014-11-27 | 2017-09-01 | 江汉大学 | A kind of pulse signal source device |
| CN104811197A (en) * | 2015-03-30 | 2015-07-29 | 江汉大学 | Synchronous phase discrimination method and atomic frequency standard |
| CN107272394A (en) * | 2017-06-16 | 2017-10-20 | 江汉大学 | A kind of integrated resonant time dissemination system calibration method of backup formula |
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Granted publication date: 20111214 Termination date: 20130602 |