CN208188201U - Multi-parameter comparison device based on optical label - Google Patents
Multi-parameter comparison device based on optical label Download PDFInfo
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- CN208188201U CN208188201U CN201820698433.2U CN201820698433U CN208188201U CN 208188201 U CN208188201 U CN 208188201U CN 201820698433 U CN201820698433 U CN 201820698433U CN 208188201 U CN208188201 U CN 208188201U
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Abstract
The utility model discloses a kind of multi-parameter comparison device based on optical label, belong to frequency stability measurement technical field, including centralized processing device, the first frequency divider, measuring part, the first signal processor, second signal processor, the second frequency divider, counting component and memory, the output of first frequency divider is connected with concentration processor；The output of first signal processor is connected with the first input end of first frequency divider, the measuring part respectively；The output of the second signal processor is connected with the measuring part；The output of second frequency divider is connected with the second signal processor；The counting component is connected with first signal processor, the second signal processor respectively；The memory is connected with the centralized processing device, the counting component respectively.The utility model has reached the precision that can be improved measurement on the basis of keeping existing measurement method characteristic and has increased the technical effect of the range of measurement frequency.
Description
Technical field
The utility model belongs to frequency stability measurement technical field, in particular to a kind of multi-parameter ratio based on optical label
To device.
Background technique
Chronometer time not only has important role in basic research field, such as VARIATION OF THE EARTH'S ROTATION geodynamics is ground
Study carefully, the theory of relativity research and satellite dynamics geodetic etc.；And also have in application study, national defence and the development of the national economy general
Time application, such as aerospace, power transmission and Scientific Measurement.Frequency stability is then to measure a signal source of clock output
The important indicator of frequency signal stability.
For the device of frequency measurement, common digital frequency measuring is in the given sampling time (i.e. when gate
Between) in, the pulse number by measuring measured signal then obtains the frequency of measured signal to convert.But it measures in this way
Precision depend on gate time and measured signal frequency, when the frequency of measured signal is lower or gate time obtain compared with
Hour, it will so that measurement result is generated large error.
In conclusion in existing technology, there is can not improve on the basis of keeping existing measurement method characteristic
The precision of measurement and the range for increasing measurement frequency.
Utility model content
Technical problem to be solved in the utility model can not be improved on the basis of keeping existing measurement method characteristic
The precision of measurement and the range for increasing measurement frequency.
In order to solve the above technical problems, the utility model provides a kind of multi-parameter comparison device based on optical label, institute
Stating device includes centralized processing device, is carried out at control and data by the centralized processing device to the first signal and the second signal
Reason；First frequency divider, the output of first frequency divider are connected with the centralized processing device, and pass through first frequency divider pair
First signal carries out DDS scaling down processing；Measuring part, by the measuring part judge the first signal rising edge with
Whether the specific time difference of second signal rising edge reaches the measurement accuracy of the intrinsic minimum resolution of module, to pass through
Stating centralized processing device makes corresponding counter work；First signal processor, the output point of first signal processor
It is not connected with the first input end of first frequency divider, the measuring part, and by first signal processor
Manage first signal；The output of second signal processor, the second signal processor is connected with the measuring part, and
The second signal is handled by the second signal processor；Second frequency divider, the output of second frequency divider and described
The connection of second signal processor, and DDS scaling down processing is carried out to the second signal by second frequency divider；Counting group
Part, the counting component are connected with first signal processor, the second signal processor respectively, and pass through the meter
Array part receives the output of first signal processor and the second signal processor, to the second signal and described
When the phase difference of first signal differs minimum under the measurement accuracy of the intrinsic minimum resolution of measuring part, to second letter
Number and first signal counted；Memory, the memory respectively with the centralized processing device, the counting component phase
Connection, and the latch counted by the memory.
Further, second frequency divider include the first chip, by first chip to the second signal into
1/100 scaling down processing of row is delivered to the counting component and carries out after the 1/100 crossover rate signal that first chip obtains
Coarse frequency measurement.
Further, second frequency divider includes integrated circuit components, by described in integrated circuit components reading
After the numerical value that memory samples the counting component, frequency values at this time are recorded, just obtain described second multiplied by after 100
The coarse frequency value F of signal.
Further, second frequency divider includes third signal processor；Second chip, the second signal it is another
Road is transported to the second input terminal of second chip after the third signal processor, using as second core
Reference clock when piece works；And the frequency signal of 1MHz is obtained after second chip, resulting frequency signal is sent again
1MHz frequency signal is obtained after to filter to be exported.
Further, the counting element when counting component is walked including first, counting element pair when being walked by described first
1/100 fractional frequency signal of the second signal is counted.
Further, the counting element when counting component is walked including second, counting element pair when being walked by described second
The second signal after being divided stable and accurate second signal counted.
Further, the counting component includes counting element when third is walked, counting element pair when being walked by the third
First signal is counted.
Further, described device includes computer, and the computer is connected with the centralized processing device.
The utility model has the advantages that
The utility model provides a kind of multi-parameter comparison device based on optical label, by by the defeated of the first signal processor
It is connected with each other respectively with the first input end of the first frequency divider, measuring part out, to handle the by the first signal processor
One signal；The output of second signal processor and measuring part are connected with each other, to handle second by second signal processor
Signal；The output of first frequency divider is connected with concentration processor, to be carried out at DDS frequency dividing by the first frequency divider to the first signal
Reason；The output of second frequency divider is connected with second signal processor, to carry out DDS frequency dividing to second signal by the second frequency divider
Processing.Meanwhile counting component being connected with each other with the first signal processor, second signal processor respectively, and passing through counting
Component receives the output of the first signal processor and second signal processor, is existed with the phase difference to second signal and the first signal
When differing minimum under the intrinsic minimum resolution measurement accuracy of measuring part, second signal and the first signal are counted.Again
Memory is connected with each other with concentration processor, counting component respectively, and the latch counted by memory；Pass through survey
Component is measured to judge it is inherently minimum whether the first signal rising edge and the specific time difference of second signal rising edge reach module
Resolution measurement precision, to make corresponding counter work by focusing on device；Then by centralized processing device come pair
The first signal and the second signal carry out control and data processing.To reach on the basis of keeping existing measurement method characteristic,
It can be improved the precision of measurement and increase the technical effect of the range of measurement frequency.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is a kind of structural representation of the multi-parameter comparison device based on optical label provided by the embodiment of the utility model
Figure；
Wherein, the 100-the first signal processor, 200-second signal processors, the 300-the first frequency divider, 400-the
Two-divider, 500-counting components, 600-memories, 700-measuring parts, 800-centralized processing devices, 900-computers.
Specific embodiment
The utility model discloses a kind of multi-parameter comparison device based on optical label, by by the first signal processor
100 output is connected with each other with the first input end of the first frequency divider 300, measuring part 700 respectively, by the first signal
Device 100 is managed to handle the first signal；The output of second signal processor 200 and measuring part 700 are connected with each other, to pass through second
Signal processor 200 handles second signal；The output of first frequency divider 300 and concentration processor 800 connect, to pass through first
Frequency divider 300 carries out DDS scaling down processing to the first signal；The output of second frequency divider 400 and second signal processor 200 connect
It connects, to carry out DDS scaling down processing to second signal by the second frequency divider 400.Meanwhile by counting component 500 respectively with first
Signal processor 100, second signal processor 200 are connected with each other, and receive the first signal processor by counting component 500
100 and second signal processor 200 output, it is intrinsic in measuring part 700 with the phase difference to second signal and the first signal
Minimum resolution measurement accuracy under when differing minimum, second signal and the first signal are counted.Memory 600 is divided again
Not and processor 800, counting component 500 is concentrated to be connected with each other, and passes through the latch that memory 600 is counted；Pass through survey
Component 700 is measured to judge whether the first signal rising edge and the specific time difference of second signal rising edge reach module inherently most
Small resolution measurement precision, to make corresponding counter work by focusing on device 800；Then pass through centralized processing device
800 come to the first signal and the second signal carry out control and data processing.Existing measurement method characteristic is being kept to reach
On the basis of, it can be improved the precision of measurement and increase the technical effect of the range of measurement frequency.
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art's every other embodiment obtained, all belongs to
In the range of the utility model protection；Wherein "and/or" keyword involved in this implementation, indicate and or two kinds of situations, change
Sentence is talked about, and A mentioned by the utility model embodiment and/or B illustrate two kinds of A and B, A or B situations, describe A and B and deposited
Three kinds of states, such as A and/or B, indicate: only including A does not include B；Only including B does not include A；Including A and B.
Meanwhile in the utility model embodiment, when component is referred to as " being fixed on " another component, it can be directly another
On one component or there may also be components placed in the middle.When a component is considered as " connection " another component, it be can be
It is directly connected to another component or may be simultaneously present component placed in the middle.When a component be considered as " being set to " another
Component, it, which can be, is set up directly on another component or may be simultaneously present component placed in the middle.The utility model embodiment
Used in term "vertical", "horizontal", "left" and "right" and similar statement be merely for purposes of illustration, not
It is intended to limit the utility model.
Referring to Figure 1, Fig. 1 is a kind of multi-parameter comparison device based on optical label provided by the embodiment of the utility model
Structural schematic diagram.The utility model provides a kind of multi-parameter comparison device based on optical label, more ginsengs based on optical label
Number comparison device includes the first signal processor 100, second signal processor 200, the first frequency divider 300, the second frequency divider
400, counting component 500, memory 600, measuring part 700 and concentration processor 800.Now respectively to the first signal processor
100, second signal processor 200, the first frequency divider 300, the second frequency divider 400, counting component 500, memory 600, measurement
Component 700 and concentration processor 800 carry out following detailed description:
For the first signal processor 100:
First signal processor 100 output can respectively with the first input end of the first frequency divider 300, measurement portion
Part 700 is connected, and handles the first signal by the first signal processor 100.
Specifically, the first signal processor 100 can refer to the first isolated amplifier；First signal can refer to reference
Clock signal；First frequency divider 300 can refer to that DDS frequency unit, first input end can refer to external clock input terminal；Measurement
Component 700 can refer to precise time-time-interval measuring unit.I.e. the first isolated amplifier is to the processing to reference clock signal；
Counting unit when it exports the external clock input terminal for being connected to DDS frequency unit, precise time-time-interval measuring unit and walks.
Temporal frequency signal stabilization degree measurement in, with reference to use frequency source signal generally use 10MHz clock signal as
Canonical reference input, and the rate-adaptive pacemaker of reference source signal can see a more stable clock source as, by stable
Reference source clock signal makees digit synthesis frequency splitting technology, the periodic sampling clock signal of available standard.For measured signal
For, for the application measurement range for widening entire measuring device, meet the needs of high frequency testing, is guaranteeing measured signal source
The DDS chip and technology of existing comparative maturity are introduced under the premise of inherent stability is unaffected, in utility model, it is root
It is sampled according to Nyquist, from the phase of continuous signal by sample of signal, quantization, coding, forms a table of natural sines, deposit
In EPROM.When synthesis, by changing the frequency control word of phase accumulator, to change phase increment, phase increment difference will
Lead to the difference of the number of sampling in one week.Because angular frequency is in the case where sampling frequency is constant, by changing phase accumulator
Frequency control word pass through D/A transformation and low-pass filter by phase/amplitude quantization of this variation at digital signal
Obtain the integrated signal of people's needs.It, can after measured signal is handled by DDS because of its good input and output signal-to-noise ratio
Obtain that stability is suitable with former measured signal and the lower signal of frequency.Due to being by the former measured signal of upper frequency in scheme
Frequency dividing is converted into the measured signal of lower frequency, uses the upper PLL frequency multiplication functions of modules without using inside it in DDS chip,
Therefore more preferably signal-to-noise ratio output can be obtained in DDS output end.And the tested frequency signal not high for those accuracy is (such as
10.123456789MHz), after the frequency dividing of DDS, available point-device periodic signal is (such as
1.000000000MHz)。
To improve the precision entirely measured, on the basis of " equal precision measurement " method, chronometer time measurement module is introduced,
When periodic sampling clock signal starts/end trigger along arrive when, be not that measured signal and reference signal are started/tied at once
Beam counts, but first judges that the phase of two paths of signals is closed under the minimum measurement accuracy of chronometer time measurement module inherently
System, is overlapped the rising edge of measured signal and reference signal as far as possible.When the rising time difference of measured signal and reference signal is
When ns magnitude, the pulse counting method of traditional measurement pulse width is no longer applicable in.This is because the pulse to be surveyed is narrower, it is required
The clock frequency wanted is just higher, also higher to the performance requirement of chip.TDC-GP is introduced in utility model device1Module.
For second signal processor 200:
The output of the second signal processor 200 can be connected with measuring part 700, and by second signal
Device 200 is managed to handle second signal.
Specifically, second signal processor 200 can refer to the second isolated amplifier；Second signal can refer to tested
Frequency signal.I.e. the second isolated amplifier is to the processing to tested frequency signal；It, which is exported, is connected to precise time-time-interval survey
Counting unit when measuring unit and walking.
For reference frequency signal f0Processing: reference frequency signal f0DDS can be sent to after isolated amplifier 11
External clock input terminal, as DDS1Work external reference clock, while DDS1External communication port be connected to processor, use
To receive the control word command and two-way data transmission from processor.The DDS actually selected1Chip interior has 2 48
Frequency control register (F0、F1), for present apparatus reference frequency signal f0For 10MHz, when not using DDS1Internal PLL frequency multiplication
When function, 48 frequency control register F0When full packing 1, DDS1The output of 10MHz frequency signal is had, therefore to be marked
Quasi- periodic sampling time signal T (such as 1 second, 10 seconds), needs to DDS1Middle frequency control register F0Corresponding divider ratio is set
Value.The method specifically calculated is: D=(248×f)/f0.Wherein, D is the specific frequency dividing numerical value of required calculating, f0For with reference to letter
Number frequency, f in the present apparatus0For 10MHz, f is the sample time signal frequency of required frequency dividing, for f be 1Hz (1 second) and
The case where (10 seconds) 0.1Hz, frequency dividing numerical value D should be 248×10-7Or 248×10-8.Specific sampling time T is user according to reality
Needs in the sampling process of border and be arranged by the end PC software, and divide numerical value be processor by RS232 serial line interface with
After PC end communication obtains the sampling time T of user setting, with above-mentioned D=(248×f)/f0Formula is calculated.Processor root
According to DDS1DDS is written in frequency dividing numerical value D by corresponding serial communication timing1After respective cache device, final DDS is obtained1Hold the period
Sample time signal T output.
For the first frequency divider 300:
The output of first frequency divider 300 can be connected with concentration processor 800, and pass through the first frequency divider 300
DDS scaling down processing is carried out to the first signal.
Specifically, the first frequency divider 300 can refer to the DDS frequency unit of reference clock signal；Focus on device 800
It can be finger processor.I.e. the DDS frequency unit of reference clock signal is to the DDS scaling down processing to reference clock signal；Its
Output is connected to processor.
For being tested the processing of frequency signal fx: tested frequency signal fxIt can be sent respectively after isolated amplifier to two
Road DDS processing module.When measured signal frequency is up to a hundred million even several hundred megahertzs, it is contemplated that walk hour counter to by frequency measurement
The limitation of rate range designs wherein DDS all the way in the present invention2Module carries out at 1/100 frequency dividing tested frequency signal
Reason.Measured signal is sent directly into DDS after isolated amplifier2External clock input terminal, as DDS2When reference when work
Clock.DDS2External communication port be connected to single-chip microcontroller, single-chip microcontroller is according to above-mentioned D=(248×f)/f02 obtained48×10-2Point
DDS is written by serial communication timing in frequency value2Buffer area, through DDS2After 1/100 obtained crossover rate signal, send to meter when walking
Number device 1 carries out coarse frequency measurement and records frequency at this time after single-chip microcontroller reads latch to the numerical value for walking hour counter sampling
Numerical value, multiplied by the coarse frequency value F that can obtain measured signal after 100.Another way is sent by the measured signal of isolated amplifier
To DDS3External clock input terminal, as DDS3Reference clock when work.DDS simultaneously3External communication port be connected to list
Piece machine, single-chip microcontroller is according to D=(248×f)/f0It is calculated and DDS3The frequency dividing numerical value (2 of communication48×f)/F.Wherein F is logical
The coarse frequency value of measured signal that hour counter counts, single-chip microcontroller operation obtains is crossed away, f takes 1MHz, and when passing through serial communication
DDS is written in resulting specific frequency dividing numerical value by sequence3Buffer area, through DDS3The frequency signal for obtaining 1MHz afterwards believes resulting frequency
Final 1MHz frequency signal output is obtained after number being sent again to low-pass filtering module.
For the second frequency divider 400:
The output of second frequency divider 400 can be connected with second signal processor 200, and pass through the second frequency divider
400 pairs of second signals carry out DDS scaling down processing.
Second frequency divider 400 may include the first chip, integrated circuit components, third signal processor and the second core
Piece.1/100 scaling down processing is carried out to second signal by the first chip, after the 1/100 crossover rate signal that the first chip obtains,
It is delivered to counting component 500 and carries out coarse frequency measurement；Memory 600 is read by integrated circuit components to take counting component 500
After the numerical value of sample, frequency values at this time are recorded, multiplied by the coarse frequency value F for just obtaining second signal after 100；Second signal
Another way is transported to the second input terminal of the second chip after third signal processor, when using as the second chip operation
Reference clock；And the frequency signal for obtaining 1MHz after the second chip send resulting frequency signal to filter again
1MHz frequency signal is obtained to be exported.
Specifically, the second frequency divider 400 can refer to the DDS frequency unit of tested frequency signal.Believed by measured frequency
Number DDS frequency unit to the DDS scaling down processing to tested frequency signal, output is connected to the second isolated amplifier.
First chip can refer to DDS2 module；Second chip can refer to DDS3Module；Filter can refer to low pass
Filter module.The DDS frequency unit of i.e. tested frequency signal includes DDS2Module: 1/100 frequency dividing is carried out to tested frequency signal
Processing, through DDS2After 1/100 obtained crossover rate signal, send to the progress coarse frequency measurement of hour counter 1 is walked, single-chip microcontroller reads lock
After storage 1 is to the numerical value for walking the sampling of hour counter 1, frequency values at this time are recorded, measured signal can be obtained multiplied by after 100
Coarse frequency value F；DDS3Module: another way is sent to DDS by the measured signal of isolated amplifier3External clock input terminal,
As DDS3Reference clock when work, through DDS3The frequency signal for obtaining 1MHz afterwards send resulting frequency signal again to low pass
Final 1MHz frequency signal output is obtained after filter module.
For counting component 500:
The counting component 500 is connected with the first signal processor 100, second signal processor 200 respectively, and leads to
The output that counting component 500 receives the first signal processor 100 and second signal processor 200 is crossed, to second signal and the
When the phase difference of one signal differs minimum under the measurement accuracy of the intrinsic minimum resolution of measuring part 700, to second signal
It is counted with the first signal.
When counting element and third are walked when counting element, second walk when the counting component 500 can also be walked including first
Counting element.Counting element counts 1/100 fractional frequency signal of second signal when walking by first；Meter when being walked by second
Stable and accurate second signal counts after number element divides second signal；Counting element is to when being walked by third
One signal is counted.
Specifically, counting unit when counting component 500 can refer to walk.Be when walking counting unit can receive first every
Output from amplifier and the second isolated amplifier, to tested frequency signal and reference clock signal phase difference in precision
Between when differing minimum under the minimum resolution measurement precision of measurement module inherently, tested frequency signal and reference clock are believed
It number is counted.
First counting element when walking can refer to that first walks hour counter；Second counting element when walking can refer to that second walks
Hour counter；Counting element can refer to that third walks hour counter when third is walked.It is that counting unit may include first walking when walking
Hour counter, first walks hour counter counts to 1/100 fractional frequency signal to tested frequency signal；Second counting when walking
Device is used to count the stable and accurate measured signal after tested frequency signal frequency dividing；Third walks hour counter to ginseng
Clock signal is examined to be counted.
For memory 600:
The memory 600 is connected with the centralized processing device 800, the counting component 500 respectively, and by described
The latch that memory 600 is counted.
Specifically, memory 600 can refer to that latch unit, centralized processing device 800 can be finger processor.Lock
Storage unit can be used for the latch counted；Counting unit when connecting processor, walking.
For being tested the measurement of frequency signal, the 1MHz frequency that tested frequency signal obtains after the processing of DDS frequency unit
Rate signal and 10MHz reference clock signal are sent respectively to precise time-time-interval measurement module, are particularly sent to the corresponding time
Manage the STOP of chip1With START leads ends.The week that processor obtains after the processing of DDS frequency unit according to reference clock signal
The rising edge of phase sample time signal T enables precise time-time-interval measurement module to STOP1It is carried out with START two-way frequency signal
Phase measurement, and send measurement result to processor processing, it is surveyed according to the minimum resolution of precise time-time-interval measurement module
Precision is measured to judge one group of STOP1Whether reach the smallest time difference with the rising edge of START frequency signal, i.e., measured signal with
Reference clock signal time difference Δ t at this time1、Δt2Minimum is followed by subsequent processing the measurement work that device stops precise time-time-interval module,
And enabled two are walked hour counter and start counting work.When processor detects that the failing edge of periodic sampling time signal T arrives
When, enabled precise time-time-interval measurement module is to STOP again1Phase measurement is carried out with START two-way frequency signal, when sentencing
The time difference Δ t at disconnected this moment of two paths of signals1、Δt2When minimum, processor stops the measurement work of precise time-time-interval measurement module
Make, and the count value that enabled two latch walk hour counter to two respectively latches, while making two by processor
Walk after hour counter is reset and enable the sample count of a new round.
For measuring part 700:
It may determine that the first signal rising edge and second signal rising edge specific time difference by the measuring part 700
Whether value reaches the measurement accuracy of the intrinsic minimum resolution of module, carry out corresponding counter by focusing on device 800
Work.
Specifically, precise time-time-interval measuring unit may determine that one group of reference clock signal rising edge of this moment and quilt
Survey whether the specific time difference of signal rising edge reaches the intrinsic minimum resolution measurement accuracy of module, to make by processor
It counter can work accordingly.
In a complete sampling period T, saved two of two latch walk the reading value N of hour counter1、N2
Processor is passed to, processor passes through RS232 serial line interface for measurement result N1、N2It is transmitted to PC machine end, the end PC software is according to public
Formula fx=f0×N1N2Obtaining corresponding measured signal real-time frequency value y1, y2 ... yi, (n-1, n are positive whole for i=1,2,3 ...
Number).Simultaneously at the end PC using Visual Basic programmed environment and DirectX graph processing technique by measurement result and in real time
Measured signal experiment curv is displayed on the screen.The calculated result of measured signal frequency stability is according to Allan variance or Kazakhstan
It is obtained up to Ma variance.It should be noted that the real-time frequency value that measurement is obtained is with Allan variance or Hadamard Variance
It is specific when calculating frequency stability, need the average value divided by measured signal real-time frequency in the result calculation method be by
The frequency values of measured signal in n sampling period T do summation averaging.
For focusing on device 800:
The first signal and the second signal can be carried out with control and data processing by focusing on device 800.In order to survey
The result of amount shown, it can also include computer that the utility model, which provides a kind of multi-parameter comparison device based on optical label,
900, the computer 900 and concentration processor 800 are connected with each other.
Specifically, processor can be used for the control and data processing of signal.Computer 900 can refer to PC machine.This reality
With a kind of novel precise time-time-interval measurement module that provides in the multi-parameter comparison device based on optical label using TDC-GP1Mould
Block, it is to propose a kind of new time interval measurement method by the absolute transmission time of logic gates using signal,
Time interval between START signal and STOP signal is determined by the number of NOT gate, and the transmission time of NOT gate can be by collecting
It is accurately determined at circuit technology.In the TDC-GP of selection1In module, one group of reference clock signal of this moment is judged by it
(START) rising edge and measured signal (STOP1) whether the specific time difference of rising edge reach minimum resolution measurement accuracy
It is interior, i.e., when reference clock signal is with this moment phase difference minimum of measured signal, to enable corresponding counter by processor
It works, finally makes the meter reading of the measured signal and reference signal within the entire sampling period as quasi- as possible
Really, to improve the precision of entire frequency stability measurement；Then by the end PC using Visual Basic programmed environment and
Measurement result and real-time measured signal experiment curv are displayed on the screen by DirectX graph processing technique.To make this reality
It a kind of multi-parameter comparison device based on optical label be provided can satisfy engineering duty with novel to stability of frequency of time domain signal
The requirement of measurement.Measurement accuracy is further increased on the basis of " equal precision measurement ", makes up " equal precision measurement " bring mistake
Difference.It can be widely applied to the frequency stability measurement of temporal frequency signal source, such as crystal oscillator, programme-controlled exchange signal
Source, atomic frequency standard etc..
The utility model provides a kind of multi-parameter comparison device based on optical label, by by the first signal processor 100
Output respectively with the first input end of the first frequency divider 300, measuring part 700 be connected with each other, with pass through the first signal processing
Device 100 handles the first signal；The output of second signal processor 200 and measuring part 700 are connected with each other, to pass through the second letter
Number processor 200 handles second signal；The output of first frequency divider 300 and concentration processor 800 connect, to pass through first point
Frequency device 300 carries out DDS scaling down processing to the first signal；The output of second frequency divider 400 and second signal processor 200 connect,
To carry out DDS scaling down processing to second signal by the second frequency divider 400.Meanwhile by counting component 500 respectively with the first signal
Processor 100, second signal processor 200 are connected with each other, and receive the first signal processor 100 by counting component 500
It is intrinsic most in measuring part 700 with the phase difference to second signal and the first signal with the output of second signal processor 200
When differing minimum under small resolution measurement precision, second signal and the first signal are counted.Again by memory 600 respectively and
Focus on device 800, the latch that counting component 500 is connected with each other, and is counted by memory 600；Pass through measurement portion
Part 700 divides to judge whether the first signal rising edge and the specific time difference of second signal rising edge reach the intrinsic minimum of module
Resolution measurement accuracy, to make corresponding counter work by focusing on device 800；Then pass through centralized processing device 800
To carry out control and data processing to the first signal and the second signal.To reach on the basis for keeping existing measurement method characteristic
On, it can be improved the precision of measurement and increase the technical effect of the range of measurement frequency.
It should be noted last that the above specific embodiment is only to illustrate the technical solution of the utility model rather than limits
System, although the utility model is described in detail referring to example, those skilled in the art should understand that, it can be right
The technical solution of the utility model is modified or replaced equivalently, without departing from the spirit and model of technical solutions of the utility model
It encloses, should all cover in the scope of the claims of the utility model.
Claims (8)
1. a kind of multi-parameter comparison device based on optical label, which is characterized in that described device includes:
Device is focused on, control and data processing are carried out to the first signal and the second signal by the centralized processing device；
First frequency divider, the output of first frequency divider are connected with the centralized processing device, and pass through first frequency divider
DDS scaling down processing is carried out to first signal；
Measuring part judges that the first signal rising edge and the second signal rising edge are specific by the measuring part
Whether time difference reaches the measurement accuracy of the intrinsic minimum resolution of module, to make to count accordingly by the centralized processing device
Device works；
First signal processor, first signal processor output respectively with the first input end of first frequency divider,
The measuring part is connected, and passes through the first signal described in first signal processor processes；
The output of second signal processor, the second signal processor is connected with the measuring part, and passes through described the
The binary signal processor processing second signal；
Second frequency divider, the output of second frequency divider are connected with the second signal processor, and pass through described second point
Frequency device carries out DDS scaling down processing to the second signal；
Counting component, the counting component are connected with first signal processor, the second signal processor respectively, and
The output that first signal processor and the second signal processor are received by the counting component, to described second
It is right when the phase difference of signal and first signal differs minimum under the measurement accuracy of the intrinsic minimum resolution of measuring part
The second signal and first signal are counted；
Memory, the memory are connected with the centralized processing device, the counting component respectively, and pass through the memory
The latch counted.
2. a kind of multi-parameter comparison device based on optical label as described in claim 1, which is characterized in that second frequency dividing
Device includes:
First chip carries out 1/100 scaling down processing to the second signal by first chip, obtains through first chip
After the 1/100 crossover rate signal arrived, it is delivered to the counting component and carries out coarse frequency measurement.
3. a kind of multi-parameter comparison device based on optical label as claimed in claim 2, which is characterized in that second frequency dividing
Device includes:
Integrated circuit components read the numerical value that the memory samples the counting component by the integrated circuit components
Afterwards, frequency values at this time are recorded, multiplied by the coarse frequency value F for just obtaining the second signal after 100.
4. a kind of multi-parameter comparison device based on optical label as claimed in claim 3, which is characterized in that second frequency dividing
Device includes:
Third signal processor；
Second chip, the another way of the second signal are transported to second core after the third signal processor
Second input terminal of piece, reference clock when using as second chip operation；And 1MHz is obtained after second chip
Frequency signal, 1MHz frequency signal is obtained after resulting frequency signal is sent again to filter and is exported.
5. a kind of multi-parameter comparison device based on optical label as claimed in claim 4, which is characterized in that the counting component
Include:
First counting element when walking, when being walked by described first counting element to 1/100 fractional frequency signal of the second signal into
Row counts.
6. a kind of multi-parameter comparison device based on optical label as claimed in claim 5, which is characterized in that the counting component
Include:
Second counting element when walking, it is accurate to stablize after counting element divides the second signal when walking by described second
Second signal counted.
7. a kind of multi-parameter comparison device based on optical label as claimed in claim 6, which is characterized in that the counting component
Include:
Counting element when third is walked, counting element counts first signal when being walked by the third.
8. a kind of multi-parameter comparison device based on optical label as claimed in claim 7, which is characterized in that described device packet
It includes:
Computer, the computer are connected with the centralized processing device.
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| CN201820698433.2U CN208188201U (en) | 2018-05-11 | 2018-05-11 | Multi-parameter comparison device based on optical label |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114779607A (en) * | 2021-05-10 | 2022-07-22 | 深圳阜时科技有限公司 | Time measurement circuit, time measurement method, time measurement chip, time measurement module and electronic equipment |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114779607A (en) * | 2021-05-10 | 2022-07-22 | 深圳阜时科技有限公司 | Time measurement circuit, time measurement method, time measurement chip, time measurement module and electronic equipment |
| CN114779607B (en) * | 2021-05-10 | 2023-11-28 | 深圳阜时科技有限公司 | Time measurement circuit, time measurement method, time measurement chip, time measurement module and electronic equipment |
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