CN203117287U - Frequency comparison device - Google Patents
Frequency comparison device Download PDFInfo
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- CN203117287U CN203117287U CN 201320062877 CN201320062877U CN203117287U CN 203117287 U CN203117287 U CN 203117287U CN 201320062877 CN201320062877 CN 201320062877 CN 201320062877 U CN201320062877 U CN 201320062877U CN 203117287 U CN203117287 U CN 203117287U
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- frequency
- multiplier
- difference
- counter
- frequency multiplier
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Abstract
The utility model discloses a frequency comparison device, belonging to the field of atom frequency marking. The frequency comparison device comprises a first frequency multiplier, a second frequency multiplier, a frequency difference multiplier, a counter and a processing module, wherein the frequency difference multiplier is respectively electrically connected with the first frequency multiplier, the second frequency multiplier and the counter, and the counter is electrically connected with the processing module. According to the utility model, frequencies of a reference signal and a detected signal are multiplied for the same multiple, frequency difference multiplication is carried on the multiplied reference and detected signals via the frequency difference multiplier, output frequency of the frequency difference multiplier is measured by the counter, and frequency difference between the reference signal and the detected signal is then calculated; and the frequency difference between the reference signal and the detected signal is amplified by frequency multiplication and frequency difference multiplication, so that a highly precise measuring result can be obtained via the counter, thereby enabling a final measuring result to be highly precise.
Description
Technical field
The utility model relates to the atomic frequency standard field, particularly a kind of frequency comparison device.
Background technology
Atomic frequency standard just is being widely used in various fields such as space flight, communication as high stable, high precision time synchronization source.
Along with the atomic frequency standard development of technology, the atomic frequency standard product just develops towards high-technology index.At present, the 1s level frequency stability of homemade hydrogen clock reaches 4E-13, and a day frequency stability reaches 4E-15.When the survey frequency degree of stability, need measure the difference on the frequency of measured signal and reference signal usually earlier, calculate the frequency stability of measured signal again, therefore, the degree of accuracy of the difference on the frequency of measuring directly affects the degree of accuracy of frequency stability.
The utility model content
In order to record high-precision difference on the frequency, the utility model embodiment provides a kind of frequency comparison device.Described technical scheme is as follows:
The utility model embodiment provides a kind of frequency comparison device, and described device comprises:
Be used for adopting prearranged multiple reference signal frequency to be carried out first frequency multiplier of frequency multiplication;
Be used for adopting described prearranged multiple the measured signal frequency to be carried out second frequency multiplier of frequency multiplication;
Be used for the output signal of described first frequency multiplier and described second frequency multiplier is carried out the frequency difference multiplier of frequency difference multiplier;
For the counter that the output frequency of described frequency difference multiplier is measured;
And for the measurement result according to described counter, calculate the processing module of the difference on the frequency of described measured signal and described reference signal;
Wherein, described frequency difference multiplier is electrically connected with described first frequency multiplier, described second frequency multiplier and described counter respectively, and described counter also is electrically connected with described processing module.
Wherein, described first frequency multiplier comprises: schottky diode frequency multiplier, resonant tank, first wave filter, triode frequency multiplier and second wave filter; Described resonant tank is electrically connected with described Xiao Jite diode frequency multiplier and described first wave filter respectively, and described triode frequency multiplier is electrically connected with described first wave filter and described second wave filter respectively.
Further, described first frequency multiplier also comprises: power amplifier, described power amplifier is electrically connected with described second wave filter.
Further, the described second frequency multiplier structure is identical with described first frequency multiplier.
Wherein, described processing module is computing machine or single-chip microcomputer.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is:
By adopting identical multiple that reference signal and measured signal are carried out frequency multiplication, carry out frequency difference multiplier by reference signal and the measured signal of frequency difference multiplier after to frequency multiplication, output frequency by the counter measures frequency difference multiplier, calculate the difference on the frequency of reference signal and measured signal again, after by frequency multiplication and frequency difference multiplier the difference on the frequency between reference signal and the measured signal being amplified, be convenient to the measurement result that counter obtains high measurement accuracy, thereby make final measurement precision height.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the frequency comparison device that provides of the utility model embodiment;
Fig. 2 is the structural representation of first frequency multiplier of the frequency comparison device that provides of the utility model embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model embodiment is described in further detail.
Embodiment
The utility model embodiment provides a kind of frequency comparison device, and referring to Fig. 1, this device comprises:
First frequency multiplier 1, second frequency multiplier 2, frequency difference multiplier 3, counter 4 and processing module 5, frequency difference multiplier 3 are electrically connected with first frequency multiplier 1, second frequency multiplier, 2 sum counters 4 respectively, and this counter 4 also is electrically connected with processing module 5.First frequency multiplier 1 is used for adopting prearranged multiple that reference signal frequency is carried out frequency multiplication; Second frequency multiplier 2 is used for adopting prearranged multiple that the measured signal frequency is carried out frequency multiplication; Frequency difference multiplier 3 is used for the output signal of first frequency multiplier 1 and second frequency multiplier 2 is carried out frequency difference multiplier; Counter 4 is used for the output frequency of frequency difference multiplier 3 is measured; The measurement result that processing module 5 is used for according to counter 4, the difference on the frequency of calculating measured signal and reference signal.
Wherein, as shown in Figure 2, first frequency multiplier 1 comprises: schottky diode frequency multiplier 11, resonant tank 12, first wave filter 13, triode frequency multiplier 14 and second wave filter 15; Resonant tank 12 is electrically connected with Xiao Jite diode frequency multiplier 11 and first wave filter 13 respectively, and triode frequency multiplier 14 is electrically connected with first wave filter 13 and second wave filter 15 respectively.Wherein, the multiple of schottky diode frequency multiplier 11 and triode frequency multiplier 14 is respectively 5 times and 2 times.
Further, first frequency multiplier 1 also comprises: power amplifier 16, this power amplifier 16 is electrically connected with second wave filter 15.
Further, second frequency multiplier, 2 structures are identical with first frequency multiplier 1.
Particularly, processing module 5 is computing machine or single-chip microcomputer.
Particularly, frequency difference multiplier refers to two frequency standard signals, by repeatedly frequency multiplication, mixing, filtering and amplify the method that the difference on the frequency of two frequency standard signals is amplified.Its advantage is that simple instrument easy to use obtained the measurement result of high measurement accuracy after difference on the frequency was amplified.If f0 is first frequency multiplier, 1 output frequency value, second frequency multiplier, 2 output frequency value are fx=f0+ Δ f, and namely the difference on the frequency between fx and the f0 is Δ f.Obtain by a multiplication by stages: mfx-(m-1) f0=f0+m Δ f; Multiplication method is often with 9 times of reference signal frequency multiplications, and 10 times of measured signal frequency multiplications then get difference frequency: 10fx-9f0=f0+10 Δ f after first order multiplication.Through after the multistage multiplication, will obtain f0+10 successively
2Δ f, f0+10
3Δ f ..., f0+10
nΔ f is about to Δ f and has enlarged 10
nDoubly.In frequency difference multiplier, frequency multiplier circuit adds centre frequency to difference on the frequency and doubles, and mixting circuit is withdrawn into base frequency on the original f0, makes difference on the frequency obtain multiplication.What deserves to be explained is, for fear of producing additional noise, so can not unrestrictedly double, generally Δ f is enlarged 10
6Doubly get final product.
By the frequency values f0+10 behind the counter 4 measurement frequency difference multipliers
nΔ f, processing module 5 can calculate the difference on the frequency of reference signal and measured signal according to the frequency difference multiplier multiple of the prearranged multiple of first frequency multiplier 1 and second frequency multiplier 2, frequency difference multiplier 3 and progression and reference signal frequency.
Know that easily processing module 5 can further be calculated the following frequency characteristic of measured signal after obtaining difference on the frequency: relative frequency deviation or frequency accuracy, ageing rate, daily fluctuation, reappearance, start characteristic etc., and frequency stability.Concrete computing method repeat no more here.
The utility model embodiment carries out frequency multiplication by adopting identical multiple to reference signal and measured signal, carry out frequency difference multiplier by reference signal and the measured signal of frequency difference multiplier after to frequency multiplication, output frequency by the counter measures frequency difference multiplier, calculate the difference on the frequency of reference signal and measured signal again, after by frequency multiplication and frequency difference multiplier the difference on the frequency between reference signal and the measured signal being amplified, be convenient to the measurement result that counter obtains high measurement accuracy, thereby make final measurement precision height.
The all or part of step that one of ordinary skill in the art will appreciate that realization above-described embodiment can be finished by hardware, also can instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be ROM (read-only memory), disk or CD etc.
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. a frequency comparison device is characterized in that, described device comprises:
Be used for adopting prearranged multiple reference signal frequency to be carried out first frequency multiplier of frequency multiplication;
Be used for adopting described prearranged multiple the measured signal frequency to be carried out second frequency multiplier of frequency multiplication;
Be used for the output signal of described first frequency multiplier and described second frequency multiplier is carried out the frequency difference multiplier of frequency difference multiplier;
For the counter that the output frequency of described frequency difference multiplier is measured;
And for the measurement result according to described counter, calculate the processing module of the difference on the frequency of described measured signal and described reference signal;
Wherein, described frequency difference multiplier is electrically connected with described first frequency multiplier, described second frequency multiplier and described counter respectively, and described counter also is electrically connected with described processing module.
2. device according to claim 1 is characterized in that, described first frequency multiplier comprises: schottky diode frequency multiplier, resonant tank, first wave filter, triode frequency multiplier and second wave filter; Described resonant tank is electrically connected with described Xiao Jite diode frequency multiplier and described first wave filter respectively, and described triode frequency multiplier is electrically connected with described first wave filter and described second wave filter respectively.
3. device according to claim 2 is characterized in that, described first frequency multiplier also comprises: power amplifier, described power amplifier is electrically connected with described second wave filter.
4. according to claim 2 or 3 described devices, it is characterized in that the described second frequency multiplier structure is identical with described first frequency multiplier.
5. according to each described device of claim 1-3, it is characterized in that described processing module is computing machine or single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320062877 CN203117287U (en) | 2013-02-04 | 2013-02-04 | Frequency comparison device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320062877 CN203117287U (en) | 2013-02-04 | 2013-02-04 | Frequency comparison device |
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| CN203117287U true CN203117287U (en) | 2013-08-07 |
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| CN 201320062877 Expired - Fee Related CN203117287U (en) | 2013-02-04 | 2013-02-04 | Frequency comparison device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809425A (en) * | 2014-01-27 | 2014-05-21 | 中国电子科技集团公司第十研究所 | Online calibration device and calibration method for atomic frequency standards |
| CN105929237A (en) * | 2016-01-25 | 2016-09-07 | 江汉大学 | Time domain signal performance evaluation apparatus |
-
2013
- 2013-02-04 CN CN 201320062877 patent/CN203117287U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809425A (en) * | 2014-01-27 | 2014-05-21 | 中国电子科技集团公司第十研究所 | Online calibration device and calibration method for atomic frequency standards |
| CN103809425B (en) * | 2014-01-27 | 2016-08-17 | 中国电子科技集团公司第十研究所 | The on-line calibration device of atomic frequency standard and calibration steps |
| CN105929237A (en) * | 2016-01-25 | 2016-09-07 | 江汉大学 | Time domain signal performance evaluation apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20140204 |