CN102540865A - High-precision time interval measurement method based on phase modulation - Google Patents
High-precision time interval measurement method based on phase modulation Download PDFInfo
- Publication number
- CN102540865A CN102540865A CN2012100017234A CN201210001723A CN102540865A CN 102540865 A CN102540865 A CN 102540865A CN 2012100017234 A CN2012100017234 A CN 2012100017234A CN 201210001723 A CN201210001723 A CN 201210001723A CN 102540865 A CN102540865 A CN 102540865A
- Authority
- CN
- China
- Prior art keywords
- clock
- signal
- time interval
- road
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Measurement Of Unknown Time Intervals (AREA)
Abstract
The invention discloses a high-precision time interval measurement method based on phase modulation. Under the control of digital clock phase-shift, a path of high-frequency and low-jitter clock is transformed to N paths of clock signals having same frequency and fixed phase difference, and is taken as a counter reference clock; a counter is driven to count respectively in N paths of clock periods; two paths of clock signals, which have the smallest error, are extracted by utilizing the clock phase information; through the combination with the clock period and the counted values, the measurement valve of the time interval is worked out. Compared with the method using a single clock for counting, the high-precision time interval measurement method effectively reduces the measurement principle error, and can improve the measurement resolution ratio to 1/n of the reference clock. A measurement device is connected with a signal conditioning module, an FPGA module, a singlechip module and a display circuit module sequentially according to the signal processing order, and realizes high measurement precision, high measurement resolution ratio, high measurement speed, real time display, and stable and reliable work under a certain crystal oscillation frequency; and the integration in the FPGA is easy, and the expansion is flexible. The high-precision time interval measurement method can be used for measuring the speed in a high-speed motion.
Description
Technical field
The invention belongs to the time interval measurement technical field, relate generally to the accurate measurement of the time of cutting to the high-speed moving object district, specifically is a kind of high precision time interval measurement method based on phase modulation (PM).The velocity test that is used for high-speed motion provides the high precision time interval measurement for the velocity test in the high-speed motion in other words.
Background technology
In the test of high-speed motion particle velocity, the time interval is to need the often parameter of test.It is more to be used for the time-measuring gauge kind of deadline interval measurement; But in the high-speed motion particle motion, because the high-speed motion particle velocity is high, the distance that tests the speed is little; Circumstance complication tests the speed; Receive the interference of electromagnetism and power-supply fluctuation easily, compare with the timing under the conventional environment, the time-measuring gauge of high-speed motion particle velocity testing experiment is higher to response, precision, resolution and jamproof requirement.All kinds of time-measuring gauges both domestic and external exist the problem of the following aspects at present:
Adopt the time-measuring gauge of direct count method principle development, come minute at interval with the method for record crystal oscillator oscillating impulse number, principle of work is simple, and measurement range is big, good linearity, but this type of time-measuring gauge can not obtain higher resolution.
Adopt the means of frequency multiplication that crystal oscillator frequency is promoted back output; Can improve the resolution and the precision of time-measuring gauge to a certain extent, but phenomenons such as phase jitter appear in frequency multiplication easily, and Clock Multiplier Factor is high more; Shake obviously more, this has limited the application of frequency multiplication to a certain extent.
Analog interpolation utilizes the capacitor charge and discharge technology that the small time interval is measured amplification, can obtain higher measuring accuracy in theory, but non-linear bigger, receives noise easily.
The vernier method principle of work is similar to vernier caliper, is a kind of digital extended method in itself.The chip of realizing with vernier method in theory can obtain high resolving power, but it needs the started oscillator and the high-precision coincidence detection circuit of high stability, and price is high, technical sophistication.
Along with the application and the development of integrated circuit, PLD, delay interpolation technology, phase shift technology also are widely used in the high precision time interval measurement.Delay interpolation technology ultimate principle is to utilize the fixing time-delay of electronic device unit to realize the measurement to the time interval as scale.It is simple in structure to postpone collimation method, and it is integrated to be easy to monolithic, can realize the measurement to the small time interval, and shortcoming is the raising along with Measurement Resolution, requires delay line length shorter and shorter, and when the survey time interval value is big, lag line quantity will increase greatly.The phase shift technology ultimate principle is to utilize frequency identical but clock signal with fixed skew in n road as the counting clock actuation counter; Get its weighted mean value as final measurement; Can Measurement Resolution be brought up to the 1/n of reference clock; But this method does not make full use of the phase information that obtains clock, can cause phase shift resolution to reduce when clock frequency is higher, and high-acruracy survey is difficulty.
Through applicant of the present invention literature search within the specific limits, do not find closer related data.
Summary of the invention
The objective of the invention is to the bigger technical matters of life period measuring error in the prior art, provide a kind of can be under certain crystal oscillator frequency, Measurement Resolution is high, measuring speed is fast; Improve measuring accuracy, reduce measuring error, realize the accurate high precision time interval measurement method that shows in real time of measuring of the time interval based on phase modulation (PM); Under certain crystal oscillator frequency, measuring accuracy is high, and Measurement Resolution is high; Measuring speed is fast, and is easy to integrated realization, flexible extension.
The technical solution of realization the object of the invention is explained as follows:
The present invention is a kind of high precision time interval measurement method based on phase modulation (PM); Through clock numeral phase shifting control; It is identical but have the clock signal of fixed skew to convert one road high frequency, low-jitter clock into N road frequency; With this reference clock as counter, actuation counter was counted respectively in the clock period of N road, and concrete phase modulation (PM) and measuring process comprise:
Step 1. utilizes signal conditioning circuit respectively the signal that two zone-block devices produce to be carried out filtering, amplification, shaping; Obtain two square-wave pulse signals with certain amplitude value; Afterwards these two square-wave pulse signals are integrated; Obtain time interval signal T to be measured, T has certain width, square-wave pulse signal that the edge is precipitous;
Two signals that zone-block device produces are simulating signals; One is enabling signal; One is pick-off signal; Two signals all are the tracer signals through zone-block device, in processing procedure, need carry out filtering, amplification, shaping to it and make it to become two square-wave pulse signals with rising edge and negative edge, respectively as the startup trigger pip of time-measuring gauge with by trigger pip.Control is integrated into one to two square-wave pulse signals and has square-wave pulse signal certain width, that the edge is precipitous for ease, as enable signal, and the start and stop of control time-measuring gauge, this square-wave pulse signal is time interval signal T;
Step 5. N road clock signal respectively with the comparison of time interval signal T in and find out or extract two minimum interval signals in the non-complete cycle signal; Be designated as l road and m road with what have the minimum interval signal in the clock of N road; 1≤l＜m≤n; The phase place of minimum interval signal is respectively
wherein in the rising edge of time interval signal T and negative edge and the N road clock signal;
is signal phase minimum at interval between time interval signal T rising edge and the back to back reference clock signal rising edge,
be signal phase minimum at interval between time interval signal T negative edge and the back to back reference clock signal rising edge.
Step 6. is N as if the counted number of pulses to m road complete cycle clock signal
m, then time interval measurement value does
In the formula, T
PBe identical clock period of N road frequency with multipath clock of fixed skew.
Need test the speed to swiftly passing object in many occasions; Because speed is high; Usually the method that adopts is: in certain distance known or that accurately mensuration is good in advance, zone-block device is set on its two frontier points, the record swiftly passing object is through the signal of two frontier points; Adopt calculagraph to measure the time interval that swiftly passing object passes through this distance segment again, this distance is exactly the movement velocity of high-speed moving object on this segment distance with the ratio in this time interval.
Traditional pulse counting method is that the umber of pulse with complete cycle is counted in the district cuts time interval signal T; With the value that the product of this count value and clock period cuts time interval signal T as the district, this horology exists ± errors of principles of 1 clock period, in the actual process that tests the speed; Make the mensuration of this time interval T have bigger error; Therefore directly have influence on the result who tests the speed, especially for the mensuration of high-speed motion, very little time error will be brought big range rate error.
In order to reduce the errors of principles, the present invention proposes a kind of through clock numeral phase shifting control, based on the high precision time interval measurement method of phase modulation (PM).For this reason the present invention with the external clock frequency multiplication, go shake, after the phase shift, obtain the clock signal that multichannel has fixed skew, under time interval signal effect to be measured, actuation counter is carried out step-by-step counting respectively, obtains a batch total numerical value.Through clock numeral phase shifting control, realized the accurate measurement method in a kind of time interval.
In the measurement in time interval of routine, in electronic circuit, convert startup and the pick-off signal of high-speed moving object through zone-block device to two time interval measurements between the pulse signal edge usually, inevitably there is the errors of principles in this.In order to reduce the errors of principles, the present invention is converted into traditional Method Of Time Measurement based on the high-frequency clock counting and adopts the multichannel multi-phase clock to carry out time measurement.Clock signal is through the precise figures phase shift; It is identical to form N road frequency; Phase place differs the multi-phase clock signal of
successively; It respectively as the reference clock of N road time interval measurement, and is counted in the clock period separately through counter.
Realization of the present invention also is: counting collection is, and to be time interval signal T with identical counting gate have a reference clock collection { CLK that stationary phase postpones successively to N road frequency is identical
i| 1≤i≤n} counts acquisition respectively.Reference clock collection { the CLK of with time interval signal T acquisition series of regular phase place being postponed in other words conj.or perhaps
i| 1≤i≤n} counts acquisition respectively.
Through behind the digital phase shift, clock is whenever separated
Produce fixed delay τ, can know
If Δ T
2i, Δ T
1iFor obey [0, T
P) go up equally distributed stochastic variable, can get measuring error thus and be:
Δ τ in the formula
l, Δ τ
mBe the l road and the m road step-by-step counting errors of principles.
With Δ T
1i(i=1 ..., n) press series arrangement from small to large, it is the arithmetic progression of τ that this n number constitutes tolerance.The 1st of ordered series of numbers is designated as Δ T
11, it necessarily satisfies 0≤Δ T
11＜τ in like manner has 0≤Δ T
21＜τ, so
-τ＜Δτ＜τ
Promptly
It is thus clear that resolution is by original T during survey
PBring up to
In theory, as long as clock is enough stable, shake enough for a short time, time difference method can reach several ps.
It is thus clear that technical scheme of the present invention can further improve measuring accuracy under the situation that does not improve the reference clock frequency.And the technological means of clock phase shift is numerous, implements convenient and simple.
Because the present invention handles the zone-block device signal through signal conditioning circuit, obtain time interval signal T.In the period of time interval signal T; Adopt N road frequency identical but have the clock signal actuation counter of fixed skew; Utilize the minimum two-way clock signal of this clock phase information extraction measuring error, cycle and count value in conjunction with clock calculate the time interval measurement value.Compare with adopting the single clock counting, the measured value that obtains has effectively reduced the errors of principles of time interval measurement, simultaneity factor working stability, reliable.
The present invention compared with prior art, its remarkable advantage is:
1. adopt clock numeral phase shifting control, under the situation that does not improve reference frequency, effectively improve the time interval measurement precision, reduced because of using high frequency clock caused to requirements such as device speed, stability.
2. Measurement Resolution is high, and measuring speed is fast.The present invention adopts step-by-step counting to combine the method deadline measurement at interval of phase shift, and principle is simple and clear, has effectively reduced the errors of principles of simple clock count, has improved measuring accuracy and resolution.Measurement Resolution is brought up to the 1/n of reference clock,
3. according to the high precision time interval measurement method based on phase modulation (PM) provided by the invention, be easy to modular implementation, be easy to integrated building, the circuit structure that forms thus is simple, and cost is low.And in the operating frequency range of device, the way that increases the phase shift clock is fairly obvious to the effect that improves measuring accuracy.
Description of drawings:
Fig. 1 is a phase modulation (PM) method synoptic diagram of the present invention;
Fig. 2 is a pulse counting method measuring intervals of TIME principle schematic;
Overall principle of compositionality figure when the high precision that Fig. 3 is based on the inventive method is surveyed.
Embodiment
Below in conjunction with accompanying drawing the present invention is elaborated:
Embodiment 1:
The present invention is a kind of high precision time interval measurement method based on phase modulation (PM); Velocity test for the high-speed motion particle is the high-acruracy survey that often need carry out in Industry Control and the national defense industry, because no matter high-speed motion is the measuring accuracy that distance or the measuring error of time all can directly have influence on speed.For a long time, in this field of measurement, be to continue to use time-measuring gauge or carry out timing through computing machine and calculate the high-speed motion speed of particle as time parameter always, the error of timing is not more considered and solved.The present invention proposes a kind of high precision time interval measurement method, is based on that phase modulation (PM) realizes.
Referring to Fig. 1; The present invention is through clock numeral phase shifting control; Convert an outside high precision clock into N road frequency is identical and have fixed skew multipath clock signal; With this reference clock as counter, actuation counter is counted respectively in the clock signal of N road, and concrete phase modulation (PM) and measuring process comprise:
Step 1. utilizes signal conditioning circuit respectively the signal that two zone-block devices produce to be carried out filtering, amplification, shaping; Obtain two square-wave pulse signals with certain amplitude value; Afterwards these two square-wave pulse signals are integrated; Obtain time interval signal T to be measured, T has certain width, square-wave pulse signal that the edge is precipitous;
The outside high precision crystal oscillator 1 of step 2. carries out frequency multiplication, goes shake, obtains high frequency clock signal, this high frequency clock signal through phase shifting control, is produced the identical multipath clock signal with fixed skew of N road frequency, or claim reference clock signal, referring to Fig. 2.
Step 5. N road clock signal respectively with the comparison of time interval signal T in and find out or extract two minimum interval signals in the non-complete cycle signal; Be designated as l road and m road with what have the minimum interval signal in the clock of N road; 1≤l＜m≤n; The phase place of minimum interval signal is respectively
wherein in the rising edge of time interval signal T and negative edge and the N road clock signal;
is signal phase minimum at interval between time interval signal T rising edge and the back to back reference clock signal rising edge,
be signal phase minimum at interval between time interval signal T negative edge and the back to back reference clock signal rising edge.
Step 6. is N as if the counted number of pulses to m road complete cycle clock signal
m, then time interval measurement value does
In the formula, T
PBe identical clock period of N road frequency with multipath clock of fixed skew.
Based on the high precision time interval measurement method of phase modulation (PM) with embodiment 1; Time interval measurement method based on this clock numeral phase shifting control; The present invention has also designed a kind of high precision time interval measurement device based on phase modulation (PM), and referring to Fig. 3, measurement mechanism includes: counting module, display circuit module, signal condition module, FPGA module 2, one-chip computer module 3 and high precision crystal oscillator 1; The signal that produces through zone-block device connects the signal condition module; The output of signal condition module connects FPGA module 2, and the clock signal of high precision crystal oscillator 1 connects the special clock input end of FPGA module 2, and the output terminal of FPGA module 2 connects one-chip computer module 3; Outside high precision crystal oscillator 1 carries out frequency multiplication, goes shake under the effect of FPGA module 2 inner phaselocked loops; Obtain a high frequency clock; Inner in FPGA module 2 through phase shifting control, produce the identical multipath clock of N road frequency with fixed skew, this multipath clock actuation counter is respectively carrying out step-by-step counting in the clock period separately; The count value that obtains sends one-chip computer module 3 to through FPGA module 2; And in one-chip computer module 3, carry out data processing, result of calculation is given display circuit module 4, realizes measurement in real time of time interval measurement value and demonstration.
The course of work is that the signal condition module is carried out filtering, amplification, shaping through the signal that zone-block device is produced, and obtains supplying the standard signal of FPGA module 2 identifications.Outside high precision crystal oscillator 1 carries out frequency multiplication, goes shake under the effect of FPGA module 2 inner phaselocked loops; Obtain a high frequency clock; Through phase shifting control, produce the multipath clock that frequency is identical, have fixed skew afterwards, actuation counter is being carried out step-by-step counting in the clock period separately respectively.The count value that obtains sends one-chip computer module 3 to through FPGA module 2, and in one-chip computer module 3, carries out data necessary and handle, and the result of calculation that obtains is given display circuit module 4, realizes that the time interval measurement value shows in real time.
Outside high precision crystal oscillator 1 adopts 50MHz high precision crystal oscillator; The FPGA module is selected the EP3C16Q FPGA of the CycloneIII of altera corp series for use; Single-chip microcomputer adopts MSP430F149; Single-chip microcomputer adopts MSP430F149, has avoided level conversion problem between FPGA and the single-chip microcomputer.Display circuit module adopts 8 LED display drivers of MAX7219 serial line interface.
The present invention is under the situation that does not improve reference frequency; Effectively improved the startup that obtains by zone-block device with closing time signal be the measuring accuracy of time interval signal T, reduced because of the use high frequency clock caused to requirements such as device speed, stability.And in the operating frequency range of device, increase through the way of increase phase shift clock and the quantity of N, fairly obvious to the effect that improves measuring accuracy.
Based on the high precision time interval measurement method and apparatus of phase modulation (PM) with embodiment 1-2, below in conjunction with accompanying drawing, in conjunction with work further explain of the present invention.
Referring to Fig. 1, signal condition module of the present invention is carried out filtering, amplification, shaping, integration through the signal that zone-block device is produced, and obtains time interval signal T, that is to say that the time interval signal T that handled is the standard signal that can supply 2 identifications of FPGA module.Outside high precision crystal oscillator 1 carries out frequency multiplication, goes shake under the effect of FPGA module 2 inner phaselocked loops; Obtain a high frequency clock; Through phase shifting control, produce the multipath clock that frequency is identical, have fixed skew afterwards, actuation counter is being carried out step-by-step counting in the clock period separately respectively.The count value that obtains sends one-chip computer module 3 to through FPGA module 2, and in one-chip computer module 3, carries out data necessary and handle, and the result of calculation that obtains is given display circuit module 4, realizes that the time interval measurement value shows in real time.
Outside high precision crystal oscillator 1 adopts the work clock of 50MHz high precision crystal oscillator as FPGA, and is stable for the output frequency that makes crystal oscillator simultaneously, adopted LC filtering that the crystal oscillator power supply is carried out filtering, reduces as far as possible to disturb.The EP3C16Q FPGA of the CycloneIII of altera corp series, this FPGA has abundant clock resource, and embedded 4 phaselocked loops can be accomplished the work of clock phase shift easily, and configuring chip adopts EPCS16.For the port output level of compatible FPGA, single-chip microcomputer adopts MSP430F149, has solved level conversion problem between FPGA and the single-chip microcomputer.Display circuit module adopts 8 LED display drivers of MAX7219 serial line interface, is convenient for measuring result's real-time demonstration.
The present invention can further improve the measuring accuracy in the time interval under the situation that does not improve the reference clock frequency, reduce because of using high frequency clock caused to requirements such as device speed, stability.In addition, the high precision time interval measurement method based on phase modulation (PM) of the present invention is easy in FPGA, realize, flexible extension, and integrated level is high, can be widely used in the field of the high precision time interval measurements such as velocity survey of high-speed particle.
Based on the high precision time interval measurement method and apparatus of phase modulation (PM) with embodiment 1-3; The present invention utilizes the customized phaselocked loop of Mega Wizard (PLL) among the FPGA design tool QuartusII; The inclk0 that outside 50MHz clock is received PLL0 through the FPGA dedicated pin holds, and PLL0 exports 3 tunnel to PLL1, PLL2 and PLL3 as reference clock with its frequency multiplication to 250MHz; PLL1～PLL3 is through the inner global clock line parallel of FPGA, and the inclk0 input end of each PLL links to each other with c0～c2 of PLL0 respectively; 3 PLL control signals are just the same, but 5 output clock phases are provided with difference among each PLL, increase progressively 22.5 ° successively, add a road 337.5 ° of phase shifted clock of PLL0, constitute 16 road phase shift signals.The present invention realized the accurate measurement in a kind of time interval, shown in real time, and it is integrated to be easy in FPGA, carry out monolithic, flexible expansion.
Embodiment 5
Based on the high precision time interval measurement method and apparatus of phase modulation (PM) with embodiment 1-4,
Utilize 50MHz high precision crystal oscillator, through the FPGA phaselocked loop with its frequency multiplication to 250MHz, obtain 16 road phase shift signals through phase control afterwards.Have under the effect of fixed pulse width signal one, control each road clock, obtain following count value in clock period inside counting separately:
Table 1 16 tunnel phase shift clock count values
Can find out that from this table resolution is 4ns when utilizing single clock to measure, can to get measurement result
resolution be 0.25ns to principle when adopting phase modulation (PM) to survey.
Embodiment 6:
Based on the high precision time interval measurement method and the measurement mechanism while embodiment 1-5 of phase modulation (PM),
In the velocity measurement of high-speed motion particle, range rate error is by the distance error and the time determination error decision of zone-block device.Test middle distance error is determined by surveying instrument, gets Δ s=0.02mm usually.When the bullet muzzle velocity is v=1000m/s, when the zone-block device distance was s=20mm, the time interval that the high-speed motion particle flies over zone-block device was t=20us.If the precision of time-measuring gauge is Δ t=10
-6S, by
Can draw range rate error is 4.9%; If adopt the time-measuring gauge that develops by the phase modulation (PM) principle, measuring accuracy Δ t=250ps, can calculate range rate error is 0.1%.It is thus clear that the high precision time-measuring gauge can effectively improve the velocity survey precision.
To sum up, the present invention provides a kind of novel high-precision time interval measurement method, adopts the multichannel multi-phase clock to measure.Through clock numeral phase shifting control, it is identical but have the clock signal of fixed skew to convert one road high frequency, low-jitter clock into N road frequency, with this reference clock as counter, and actuation counter counting respectively in clock period separately.With identical counting gate (start/by) to obtaining the reference clock collection { CLK that the series of regular phase place postpones
i| 1≤i≤n} counts respectively, obtains n count value N
i, wherein can extract minimum two paths of signals of time interval between enabling signal and pick-off signal rising edge and the back to back reference clock rising edge, be designated as the 1 the road and the m road, 1≤l＜m≤n.The phase place of this two paths of signals is respectively
If the counted number of pulses to m road clock is N
m, then time interval measurement value is obtained by computes
The present invention effectively improves the measuring accuracy in the time interval under the situation that does not improve reference frequency, reduced because of using high frequency clock caused to requirements such as device speed, stability.Measurement Resolution is high, and measuring speed is fast, has effectively reduced the errors of principles of simple clock count.Be easy to modular implementation, be easy to integrated building, the circuit structure that forms thus is simple, and cost is low.And in the operating frequency range of device, the way that increases the phase shift clock is fairly obvious to the effect that improves measuring accuracy.
Claims (2)
1. high precision time interval measurement method based on phase modulation (PM); It is characterized in that: through clock numeral phase shifting control; Convert an outside high precision clock into N road frequency is identical and have fixed skew multipath clock signal; With this reference clock as counter, actuation counter is counted respectively in the clock signal of N road, and concrete phase modulation (PM) and measuring process comprise:
Step 1. utilizes signal conditioning circuit respectively the signal that two zone-block devices produce to be carried out filtering, amplification, shaping; Obtain two square-wave pulse signals with certain amplitude value; Afterwards these two square-wave pulse signals are integrated; Obtain time interval signal T to be measured, T has certain width, square-wave pulse signal that the edge is precipitous;
The outside high precision crystal oscillator 1 of step 2. carries out frequency multiplication, goes shake, obtains high frequency clock signal, and this high frequency clock signal through phase shifting control, is produced the identical multipath clock signal with fixed skew of N road frequency;
Step 3. with the N road clock signal difference actuation counter that obtains, obtains each self-corresponding count value in time interval signal T to be measured, form the counting collection;
Step 4. compares with time interval signal T to be measured respectively with N road clock signal, and the clock signal of complete cycle is counted respectively;
Step 5.N road clock signal compares and finds out two minimum interval signals in the non-complete cycle signal with time interval signal T respectively; Be designated as l road and m road with what have the minimum interval signal in the clock of N road; 1≤l＜m≤n; The phase place of minimum interval signal is respectively
wherein in the rising edge of time interval signal T and negative edge and the N road clock signal;
is signal phase minimum at interval between time interval signal T rising edge and the back to back reference clock signal rising edge,
be signal phase minimum at interval between time interval signal T negative edge and the back to back reference clock signal rising edge;
Step 6. is N as if the counted number of pulses to m road complete cycle clock signal
m, then time interval measurement value does
In the formula, T
PThe clock period that has the N road clock of fixed skew for frequency is identical.
2. the high precision time interval measurement method based on phase modulation (PM) according to claim 1 is characterized in that: said counting collection is, and to be time interval signal T with identical counting gate have a reference clock collection { CLK that stationary phase postpones successively to N road frequency is identical
i| 1≤i≤n} counts acquisition respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100017234A CN102540865A (en) | 2012-01-04 | 2012-01-04 | High-precision time interval measurement method based on phase modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100017234A CN102540865A (en) | 2012-01-04 | 2012-01-04 | High-precision time interval measurement method based on phase modulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102540865A true CN102540865A (en) | 2012-07-04 |
Family
ID=46347966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100017234A Pending CN102540865A (en) | 2012-01-04 | 2012-01-04 | High-precision time interval measurement method based on phase modulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102540865A (en) |
Cited By (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914419A (en) * | 2012-09-25 | 2013-02-06 | 中国科学院安徽光学精密机械研究所 | Precision measurement system for relative time difference of two-channel feedback signals |
| CN103063128A (en) * | 2013-01-05 | 2013-04-24 | 清华大学 | Dynamic electronic signal phase measurement system for double-frequency laser interferometer |
| CN103092059A (en) * | 2012-12-24 | 2013-05-08 | 中国科学技术大学 | Time digital converter based on antifuse field programmable gata array (FPGA) and temperature drift correcting method thereof |
| CN103345144A (en) * | 2013-06-24 | 2013-10-09 | 沈阳东软医疗***有限公司 | Time measurement method and device |
| CN103354448A (en) * | 2013-06-18 | 2013-10-16 | 西安电子科技大学 | High resolution time interval generation system based on FPGA |
| CN103412474A (en) * | 2013-05-24 | 2013-11-27 | 西安交通大学 | TDC-GP2 time study range high-precision expansion circuit based on FPGA |
| CN104062511A (en) * | 2014-07-03 | 2014-09-24 | 中国人民解放军国防科学技术大学 | Accurate phase measurement method of multipath multi-target echo signal |
| CN104111601A (en) * | 2014-07-30 | 2014-10-22 | 中国科学院测量与地球物理研究所 | Time digitizer based on delay ring flop-out method and time interval measuring method |
| CN104199276A (en) * | 2014-09-23 | 2014-12-10 | 李亚锋 | FPGA-based (field programmable gate array based) signal time difference measurement method and FPGA-based time-to-digital converter |
| CN106019924A (en) * | 2016-07-21 | 2016-10-12 | 中国地震局地震研究所 | FPGA-based counting type high-precision time interval measuring system |
| CN107005098A (en) * | 2017-03-15 | 2017-08-01 | 香港应用科技研究院有限公司 | Wireless power transmitter |
| CN107515405A (en) * | 2017-07-17 | 2017-12-26 | 蔡方谊 | Laser ranging system and its implementation |
| CN107870558A (en) * | 2016-09-27 | 2018-04-03 | 精工爱普生株式会社 | Physical quantity measuring apparatus, electronic equipment and moving body |
| CN107870556A (en) * | 2016-09-27 | 2018-04-03 | 精工爱普生株式会社 | IC apparatus, electronic equipment and moving body |
| CN108732912A (en) * | 2018-05-28 | 2018-11-02 | 哈尔滨工业大学 | The clock phase-splitting method of measured signal edging trigger |
| CN108931785A (en) * | 2017-05-27 | 2018-12-04 | 北京万集科技股份有限公司 | A kind of laser radar clocking method and system |
| CN109298238A (en) * | 2018-11-05 | 2019-02-01 | 西安智多晶微电子有限公司 | A kind of frequency measurement method and its measuring system |
| CN109656123A (en) * | 2018-12-24 | 2019-04-19 | 成都天奥电子股份有限公司 | A kind of high precision time difference measurement and production method based on mathematical combination operation |
| CN109857014A (en) * | 2019-01-24 | 2019-06-07 | 武汉精能电子技术有限公司 | A kind of pwm signal generation method based on FPGA |
| CN110068808A (en) * | 2019-05-29 | 2019-07-30 | 南京芯视界微电子科技有限公司 | The receiver apparatus and laser radar of laser radar |
| CN110082593A (en) * | 2018-01-25 | 2019-08-02 | 深圳市英特瑞半导体科技有限公司 | A kind of Method for Phase Difference Measurement and phase measurement device |
| CN110573970A (en) * | 2017-04-14 | 2019-12-13 | 盈诺飞公司 | Wide-measuring-range high-sensitivity time-to-digital converter |
| CN110988467A (en) * | 2019-12-18 | 2020-04-10 | 北京自动化控制设备研究所 | Frequency measurement system and frequency measurement method thereof |
| CN111061145A (en) * | 2019-12-30 | 2020-04-24 | 嘉兴泰传光电有限公司 | Time delay settable time interval measuring device and measuring method based on FPGA |
| CN112230180A (en) * | 2020-09-27 | 2021-01-15 | 青岛鼎信通讯股份有限公司 | Signal source phase modulation method of electric energy meter calibrating device based on FPGA |
| CN112346327A (en) * | 2019-08-07 | 2021-02-09 | 精工爱普生株式会社 | Circuit device, physical quantity measuring device, electronic apparatus, and moving object |
| US11048289B1 (en) | 2020-01-10 | 2021-06-29 | Rockwell Collins, Inc. | Monitoring delay across clock domains using constant phase shift |
| US11157036B2 (en) | 2020-01-10 | 2021-10-26 | Rockwell Collins, Inc. | Monitoring delay across clock domains using dynamic phase shift |
| CN114019857A (en) * | 2021-10-28 | 2022-02-08 | 华中师范大学 | High-precision phase adjusting and measuring system and method based on phase interpolation |
| CN114047683A (en) * | 2021-11-15 | 2022-02-15 | 星汉时空科技(长沙)有限公司 | Time interval measuring method and device based on orthogonal sampling interpolation |
| CN114333694A (en) * | 2021-12-22 | 2022-04-12 | 合肥视涯技术有限公司 | Signal detection method and circuit, temperature sensor and silicon-based organic light-emitting display device |
| CN114814358A (en) * | 2022-06-27 | 2022-07-29 | 成都凯天电子股份有限公司 | Frequency measurement system and method |
| CN114967409A (en) * | 2022-03-28 | 2022-08-30 | 中山大学 | High-precision time-to-digital converter resisting PVT change and implementation method thereof |
| CN116068873A (en) * | 2022-03-09 | 2023-05-05 | 天蓝科技有限公司 | Time-to-digital converter |
| CN117930143A (en) * | 2024-03-20 | 2024-04-26 | 中国科学院空天信息创新研究院 | OFDM-LFM signal generating circuit based on phase-locked loop |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001311754A (en) * | 2000-04-28 | 2001-11-09 | Yokogawa Electric Corp | Time measuring device |
| CN101726728A (en) * | 2008-10-30 | 2010-06-09 | 北京时代之峰科技有限公司 | Clock phase synthesis counting method and device |
| CN101976037A (en) * | 2010-11-29 | 2011-02-16 | 北京一朴科技有限公司 | Method and device for measuring time intervals of repeated synchronous interpolation simulation |
-
2012
- 2012-01-04 CN CN2012100017234A patent/CN102540865A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001311754A (en) * | 2000-04-28 | 2001-11-09 | Yokogawa Electric Corp | Time measuring device |
| CN101726728A (en) * | 2008-10-30 | 2010-06-09 | 北京时代之峰科技有限公司 | Clock phase synthesis counting method and device |
| CN101976037A (en) * | 2010-11-29 | 2011-02-16 | 北京一朴科技有限公司 | Method and device for measuring time intervals of repeated synchronous interpolation simulation |
Non-Patent Citations (2)
| Title |
|---|
| 孙杰，潘继飞: "高精度时间间隔测量方法综述", 《计算机测量与控制》 * |
| 张朗 等: "基于相位调制的高精度测时理论研究", 《火炮发射与控制学报》 * |
Cited By (54)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914419B (en) * | 2012-09-25 | 2016-03-16 | 中国科学院安徽光学精密机械研究所 | The accurate measuring systems of two-way feedback signal relative time error |
| CN102914419A (en) * | 2012-09-25 | 2013-02-06 | 中国科学院安徽光学精密机械研究所 | Precision measurement system for relative time difference of two-channel feedback signals |
| CN103092059B (en) * | 2012-12-24 | 2015-05-27 | 中国科学技术大学 | Time digital converter based on antifuse field programmable gata array (FPGA) and temperature drift correcting method thereof |
| CN103092059A (en) * | 2012-12-24 | 2013-05-08 | 中国科学技术大学 | Time digital converter based on antifuse field programmable gata array (FPGA) and temperature drift correcting method thereof |
| CN103063128A (en) * | 2013-01-05 | 2013-04-24 | 清华大学 | Dynamic electronic signal phase measurement system for double-frequency laser interferometer |
| CN103063128B (en) * | 2013-01-05 | 2015-05-20 | 清华大学 | Dynamic electronic signal phase measurement system for double-frequency laser interferometer |
| CN103412474A (en) * | 2013-05-24 | 2013-11-27 | 西安交通大学 | TDC-GP2 time study range high-precision expansion circuit based on FPGA |
| CN103412474B (en) * | 2013-05-24 | 2015-11-25 | 西安交通大学 | Range high-precision expanded circuit when TDC-GP2 based on FPGA surveys |
| CN103354448A (en) * | 2013-06-18 | 2013-10-16 | 西安电子科技大学 | High resolution time interval generation system based on FPGA |
| CN103354448B (en) * | 2013-06-18 | 2015-09-30 | 西安电子科技大学 | Based on the high resolution time interval generation system of FPGA |
| CN103345144A (en) * | 2013-06-24 | 2013-10-09 | 沈阳东软医疗***有限公司 | Time measurement method and device |
| CN104062511B (en) * | 2014-07-03 | 2016-06-22 | 中国人民解放军国防科学技术大学 | A kind of precise phase measuring method of multichannel multiple target echo-signal |
| CN104062511A (en) * | 2014-07-03 | 2014-09-24 | 中国人民解放军国防科学技术大学 | Accurate phase measurement method of multipath multi-target echo signal |
| CN104111601A (en) * | 2014-07-30 | 2014-10-22 | 中国科学院测量与地球物理研究所 | Time digitizer based on delay ring flop-out method and time interval measuring method |
| CN104111601B (en) * | 2014-07-30 | 2016-08-24 | 中国科学院测量与地球物理研究所 | A kind of time-to-digit converter based on time delay ring "flop-out" method and time interval measurement method thereof |
| CN104199276A (en) * | 2014-09-23 | 2014-12-10 | 李亚锋 | FPGA-based (field programmable gate array based) signal time difference measurement method and FPGA-based time-to-digital converter |
| CN106019924A (en) * | 2016-07-21 | 2016-10-12 | 中国地震局地震研究所 | FPGA-based counting type high-precision time interval measuring system |
| CN107870558B (en) * | 2016-09-27 | 2021-06-25 | 精工爱普生株式会社 | Physical quantity measuring device, electronic apparatus, and moving object |
| CN107870558A (en) * | 2016-09-27 | 2018-04-03 | 精工爱普生株式会社 | Physical quantity measuring apparatus, electronic equipment and moving body |
| CN107870556A (en) * | 2016-09-27 | 2018-04-03 | 精工爱普生株式会社 | IC apparatus, electronic equipment and moving body |
| CN107005098A (en) * | 2017-03-15 | 2017-08-01 | 香港应用科技研究院有限公司 | Wireless power transmitter |
| CN110573970B (en) * | 2017-04-14 | 2021-04-16 | 盈诺飞公司 | Wide-measuring-range high-sensitivity time-to-digital converter |
| CN110573970A (en) * | 2017-04-14 | 2019-12-13 | 盈诺飞公司 | Wide-measuring-range high-sensitivity time-to-digital converter |
| CN108931785A (en) * | 2017-05-27 | 2018-12-04 | 北京万集科技股份有限公司 | A kind of laser radar clocking method and system |
| CN107515405A (en) * | 2017-07-17 | 2017-12-26 | 蔡方谊 | Laser ranging system and its implementation |
| CN110082593A (en) * | 2018-01-25 | 2019-08-02 | 深圳市英特瑞半导体科技有限公司 | A kind of Method for Phase Difference Measurement and phase measurement device |
| CN108732912A (en) * | 2018-05-28 | 2018-11-02 | 哈尔滨工业大学 | The clock phase-splitting method of measured signal edging trigger |
| CN109298238A (en) * | 2018-11-05 | 2019-02-01 | 西安智多晶微电子有限公司 | A kind of frequency measurement method and its measuring system |
| CN109656123A (en) * | 2018-12-24 | 2019-04-19 | 成都天奥电子股份有限公司 | A kind of high precision time difference measurement and production method based on mathematical combination operation |
| CN109656123B (en) * | 2018-12-24 | 2020-08-25 | 成都天奥电子股份有限公司 | High-precision time difference measuring and generating method based on mathematical combination operation |
| CN109857014A (en) * | 2019-01-24 | 2019-06-07 | 武汉精能电子技术有限公司 | A kind of pwm signal generation method based on FPGA |
| WO2020237765A1 (en) * | 2019-05-29 | 2020-12-03 | 南京芯视界微电子科技有限公司 | Receiver device of lidar and lidar |
| CN110068808A (en) * | 2019-05-29 | 2019-07-30 | 南京芯视界微电子科技有限公司 | The receiver apparatus and laser radar of laser radar |
| US11320792B2 (en) | 2019-08-07 | 2022-05-03 | Seiko Epson Corporation | Circuit device, physical quantity measuring device, electronic apparatus, and vehicle |
| CN112346327A (en) * | 2019-08-07 | 2021-02-09 | 精工爱普生株式会社 | Circuit device, physical quantity measuring device, electronic apparatus, and moving object |
| CN110988467B (en) * | 2019-12-18 | 2022-01-11 | 北京自动化控制设备研究所 | Frequency measurement system and frequency measurement method thereof |
| CN110988467A (en) * | 2019-12-18 | 2020-04-10 | 北京自动化控制设备研究所 | Frequency measurement system and frequency measurement method thereof |
| CN111061145B (en) * | 2019-12-30 | 2022-07-05 | 嘉兴泰传光电有限公司 | Time delay settable time interval measuring device and measuring method based on FPGA |
| CN111061145A (en) * | 2019-12-30 | 2020-04-24 | 嘉兴泰传光电有限公司 | Time delay settable time interval measuring device and measuring method based on FPGA |
| US11048289B1 (en) | 2020-01-10 | 2021-06-29 | Rockwell Collins, Inc. | Monitoring delay across clock domains using constant phase shift |
| US11157036B2 (en) | 2020-01-10 | 2021-10-26 | Rockwell Collins, Inc. | Monitoring delay across clock domains using dynamic phase shift |
| CN112230180A (en) * | 2020-09-27 | 2021-01-15 | 青岛鼎信通讯股份有限公司 | Signal source phase modulation method of electric energy meter calibrating device based on FPGA |
| CN114019857A (en) * | 2021-10-28 | 2022-02-08 | 华中师范大学 | High-precision phase adjusting and measuring system and method based on phase interpolation |
| CN114019857B (en) * | 2021-10-28 | 2024-03-22 | 华中师范大学 | High-precision phase adjustment and measurement system and method based on phase interpolation |
| CN114047683A (en) * | 2021-11-15 | 2022-02-15 | 星汉时空科技(长沙)有限公司 | Time interval measuring method and device based on orthogonal sampling interpolation |
| CN114047683B (en) * | 2021-11-15 | 2022-05-24 | 星汉时空科技(长沙)有限公司 | Time interval measuring method and device based on orthogonal sampling interpolation |
| CN114333694A (en) * | 2021-12-22 | 2022-04-12 | 合肥视涯技术有限公司 | Signal detection method and circuit, temperature sensor and silicon-based organic light-emitting display device |
| CN116068873A (en) * | 2022-03-09 | 2023-05-05 | 天蓝科技有限公司 | Time-to-digital converter |
| CN116068873B (en) * | 2022-03-09 | 2024-05-14 | 天蓝科技有限公司 | Time-to-digital converter |
| CN114967409A (en) * | 2022-03-28 | 2022-08-30 | 中山大学 | High-precision time-to-digital converter resisting PVT change and implementation method thereof |
| CN114814358A (en) * | 2022-06-27 | 2022-07-29 | 成都凯天电子股份有限公司 | Frequency measurement system and method |
| CN114814358B (en) * | 2022-06-27 | 2022-11-01 | 成都凯天电子股份有限公司 | Frequency measurement system and method |
| CN117930143A (en) * | 2024-03-20 | 2024-04-26 | 中国科学院空天信息创新研究院 | OFDM-LFM signal generating circuit based on phase-locked loop |
| CN117930143B (en) * | 2024-03-20 | 2024-05-28 | 中国科学院空天信息创新研究院 | OFDM-LFM signal generating circuit based on phase-locked loop |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102540865A (en) | High-precision time interval measurement method based on phase modulation | |
| CN102621878A (en) | High-precision time interval measurement device | |
| CN100451666C (en) | Improved method and apparatus for measuring stability of frequency of time domain signal | |
| CN101893464B (en) | High-precision and fast pulse metering method | |
| CN202362380U (en) | Multifunctional high-precision digital frequency meter | |
| CN103248356B (en) | A kind of counter and implementation method based on adopting phase-locked loop pulse interpolation technology | |
| CN102073268B (en) | High-precision pulse time interval measurement circuit | |
| CN101702033B (en) | Method for generating global positioning system (GPS) synchronous control signal detected by electromagnetic method detection | |
| CN201583811U (en) | Time-to-digital converter with temperature measurement and driving functions | |
| CN102928677A (en) | Nano pulse signal acquiring method | |
| CN105245203B (en) | High-precision low-speed clock duty ratio detecting system and method | |
| CN102645583A (en) | Broadband rapid frequency measuring method based on cluster period phase process | |
| WO2023160659A1 (en) | High-precision pulse width measurement circuit, and measurement method | |
| CN102680728A (en) | Motor rotation speed measuring method used in precise electromechanical equipment | |
| CN111766771A (en) | Voltage-controlled crystal oscillator taming-based time interval measuring method and system | |
| CN113092858A (en) | High-precision frequency scale comparison system and comparison method based on time-frequency information measurement | |
| CN203275896U (en) | Low-cost subnanosecond-grade time interval detection circuit | |
| CN103105534B (en) | Phase difference measurement circuit and measurement method based on field programmable gata array (FPGA) identical periodic signals | |
| CN203858351U (en) | High-precision detection device of magnetic resonance signal of cesium optical pump | |
| CN108768388B (en) | Clock phase splitting method triggered by serial phase-locked loop clock edge | |
| CN108736885B (en) | Phase-locked loop clock edge triggered clock phase-splitting method | |
| CN103412474B (en) | Range high-precision expanded circuit when TDC-GP2 based on FPGA surveys | |
| CN101424695A (en) | Rotate speed and differential measurement method without velocity metre | |
| CN108732912A (en) | The clock phase-splitting method of measured signal edging trigger | |
| CN205091393U (en) | Take time interval measurement function's digital frequency meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120704 |