CN207123716U - A kind of pulse signal time difference measuring device - Google Patents
A kind of pulse signal time difference measuring device Download PDFInfo
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- CN207123716U CN207123716U CN201721054908.6U CN201721054908U CN207123716U CN 207123716 U CN207123716 U CN 207123716U CN 201721054908 U CN201721054908 U CN 201721054908U CN 207123716 U CN207123716 U CN 207123716U
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Abstract
Be used to generating the signal processing module of high frequency sinusoidal observed quantity signal the utility model discloses a kind of pulse signal time difference measuring device, for generating the clock module with high frequency sinusoidal observed quantity signal with cycle reference clock signal, for obtain the number of cycles time difference counting module, for obtain the first high frequency sinusoidal observed quantity signal and the second high frequency sinusoidal observed quantity signal respectively the phase-detect measurement module with reference clock signal phase difference, for calculating the first signal and the computing module of secondary signal time difference and for making device be in the reseting module of original state.The utility model, which improves the precision in the counting cycle signal time difference and introduces phase discriminating technology, obtains the time difference that the cycle is counted less than one, solves the problems, such as to be difficult to the high precision measurement time difference when signal time is longer in the prior art.
Description
Technical field
The utility model belongs to signal time difference measurement technical field, more particularly to a kind of high precision clock pulse signal when
Difference measuring device.
Background technology
High precision clock is synchronously that 5G networks, all things on earth internet, satellite navigation system realize the basis of high accuracy positioning.
Realize that high precision clock synchronously needs to realize the high-acruracy survey of clock difference between each node.Pulse signal time difference measurement technology
A kind of method that disclosure satisfy that time difference high-acruracy survey is provided, is the synchronous important determinant of high precision clock.
The pulse signal time difference refers to that two pulse signals reach the difference of the time of observation station.Conventional method is using directly meter
Number, capacitance integral, temporal interpolation technology etc..Direct counting method is worked by the high-speed turnover device to be worked under a clock, is moved
State scope is determined that clock frequency and stability determine temporal resolution, it is possible to achieve Larger Dynamic scope by rolling counters forward scope
Measure but be difficult to high-acruracy survey.Precise time is converted to capacitance voltage value by Power Capacity point-score, after being discharged using electric capacity
Voltage variety measure capacitor discharge time, the technology by capacitor quality influenceed to be difficult to measurement dynamic range it is larger when
Between.Temporal interpolation technology is using several delay units composition delay line, the information propagated using target impulse signal along delay line
Carry out time measurement, but due to interpolation time it is long in the case of need long delay line, it is difficult to ensure accurate measurement.Cause
This, how accurately to measure pulse time difference becomes urgent problem to be solved in high precision clock synchronizing process.
Utility model content
The purpose of this utility model is：A kind of high-precision pulse time difference measuring device is provided, the signal time difference can be improved
Count the cycle precision simultaneously introduce phase discriminating technology obtain less than one count the cycle the time difference, solve in the prior art signal time compared with
The problem of being difficult to the high precision measurement time difference when long.
The technical solution adopted in the utility model is as follows：
A kind of pulse signal time difference measuring device, including：
Signal processing module, for by the processing of the first signal of input and secondary signal for the identical delay of same period the
One high frequency sinusoidal observed quantity signal and the second high frequency sinusoidal observed quantity signal；
Reference clock module, for obtaining and the first high frequency sinusoidal observed quantity signal and the second high frequency sinusoidal observed quantity
The reference clock signal of signal same period；
Counting module, it is connected with the signal processing module and reference clock module, when being reached for obtaining the first signal
Start counting up secondary signal reach when terminate count between counting number；
Phase-detect measurement module, for the first high frequency sinusoidal observed quantity signal of input and the second high frequency sinusoidal observed quantity to be believed
Two relative phase differences are exported with reference clock signal phase demodulation number respectively and are converted to data signal；
Computing module, it is connected with the phase-detect measurement module and counting module, for calculating the first signal and secondary signal
Time difference and output；
Reseting module, it is connected with the computing module, counting module and signal processing module, for making the pulse signal
Time difference measuring device returns to original state.
In order to obtain high frequency sinusoidal signal to improve the precision that the signal time difference counts the cycle, further, at the signal
Reason module includes：
Burst pulse generation module, for the processing of the first signal and secondary signal of input is that pulse width is Δ τ the
One narrow pulse signal and the second narrow pulse signal；
High frequency sinusoidal signal generation module, for being the by first narrow pulse signal and the processing of the second narrow pulse signal
One high frequency sinusoidal observed quantity signal and the second high frequency sinusoidal observed quantity signal.
In order to reduce error caused by delay in signal processing, optical telecommunications of the delay time error for subpicosecond level are used
Number processor carries out delay process, further, the burst pulse generation module, including it is straight adjust laser driver, optical branching device,
Two-way fibre delay line, photodetector and the microwave XOR gate that delay time difference is Δ τ.
Can be with showing in order to obtain the first high frequency sinusoidal observed quantity signal and the cycle of the second high rate observation amount signal and signal
Some clock cycle are consistent, further, the high frequency sinusoidal signal generation module, including for producing periodic pulse signal
Ring oscillator, the frequency divider for frequency reducing and for generating the bandpass filter of high frequency sinusoidal observed quantity signal, the annular
The delay value of the gate circuit of oscillator is Δ τ.
In order to obtain and the first high frequency sinusoidal observed quantity signal and the second high frequency sinusoidal observed quantity signal same period
Counting clock, the reference clock module includes reference clock and the phaselocked loop for frequency multiplication.
The phase-detect measurement module includes phase discriminator and analog-digital converter.
In summary, by adopting the above-described technical solution, the beneficial effects of the utility model are：Using optical signal and electricity
Signal processing technology by the processing of two-way input signal for two-way high frequency sinusoidal observed quantity signal and reference clock respectively phase demodulation to obtain
The time difference that the cycle is counted less than one is obtained, integral multiple week is carried out using with the counting clock of high frequency sinusoidal observed quantity signal same period
The timing of phase, improve the precision in the counting cycle signal time difference.
Brief description of the drawings
The utility model will illustrate by example and with reference to the appended drawing, wherein：
Fig. 1 is a kind of pulse signal time difference measuring device and the FB(flow block) of method；
Fig. 2 is a kind of pulse signal time difference measuring device and the schematic diagram of method.
Embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine in any way.
The utility model is elaborated with reference to Fig. 1, Fig. 2.
A kind of pulse signal time difference measuring device, including：
Signal processing module, for being the identical delays of same period TC by the first signal of input and secondary signal processing
First high frequency sinusoidal observed quantity signal and the second high frequency sinusoidal observed quantity signal；
Reference clock module, for obtaining and the first high frequency sinusoidal observed quantity signal and the second high frequency sinusoidal observed quantity
The reference clock signal of signal same period；
Counting module, it is connected with the signal processing module and reference clock module, when being reached for obtaining the first signal
Start counting up secondary signal reach when terminate count between counting number Counter；
Phase-detect measurement module, for the first high frequency sinusoidal observed quantity signal of input and the second high frequency sinusoidal observed quantity to be believed
Number respectively two relative phase difference P are exported with reference clock signal phase demodulation1And P2And be converted to data signal；
Computing module, it is connected with the phase-detect measurement module and counting module, for calculating the first signal and secondary signal
Time difference beAnd export；
Reseting module, it is connected with the computing module, counting module and signal processing module, for making the pulse signal
Time difference measuring device returns to original state.
The counting module, computing module and reseting module can use FPGA or MCU to realize.
In order to obtain high frequency sinusoidal signal to improve the precision that the signal time difference counts the cycle, further, at the signal
Reason module includes：
Burst pulse generation module, for the processing of the first signal and secondary signal of input is that pulse width is Δ τ the
One narrow pulse signal and the second narrow pulse signal；
High frequency sinusoidal signal generation module, for being the by first narrow pulse signal and the processing of the second narrow pulse signal
One high frequency sinusoidal observed quantity signal and the second high frequency sinusoidal observed quantity signal.
In order to reduce error caused by delay in signal processing, optical telecommunications of the delay time error for subpicosecond level are used
Number processor carries out delay process, further, the burst pulse generation module, including it is straight adjust laser driver, optical branching device,
Two-way fibre delay line, photodetector and the microwave XOR gate that delay time difference is Δ τ.
Can be with showing in order to obtain the first high frequency sinusoidal observed quantity signal and the cycle of the second high rate observation amount signal and signal
Some clock cycle are consistent, further, the high frequency sinusoidal signal generation module, including for producing periodic pulse signal
Ring oscillator, the frequency divider for frequency reducing and for generating the bandpass filter of high frequency sinusoidal observed quantity signal, the annular
The delay value of the gate circuit of oscillator is Δ τ.
In order to obtain and the first high frequency sinusoidal observed quantity signal and the second high frequency sinusoidal observed quantity signal same period
Counting clock, the reference clock module includes reference clock and the phaselocked loop for frequency multiplication.
The phase-detect measurement module includes phase discriminator and analog-digital converter.
After employing above-mentioned technical proposal, improve the precision in the counting cycle signal time difference and then improve the survey of the signal time difference
The measurement accuracy of amount.
Claims (6)
- A kind of 1. pulse signal time difference measuring device, it is characterised in that including：Signal processing module, for being the first high of the identical delay of same period by the processing of the first signal of input and secondary signal Frequently sinusoidal observed quantity signal and the second high frequency sinusoidal observed quantity signal；Reference clock module, for obtaining and the first high frequency sinusoidal observed quantity signal and the second high frequency sinusoidal observed quantity signal The reference clock signal of same period；Counting module, it is connected with the signal processing module and reference clock module, starts for obtaining when the first signal reaches Count down to secondary signal reach when terminate count between counting number；Phase-detect measurement module, for the first high frequency sinusoidal observed quantity signal of input and the second high frequency sinusoidal observed quantity signal to be divided Two relative phase differences are not exported with reference clock signal phase demodulation and are converted to data signal；Computing module, be connected with the phase-detect measurement module and counting module, for calculate the first signal and secondary signal when Between difference and export；Reseting module, it is connected with the computing module, counting module and signal processing module, for making the pulse signal time difference Measurement apparatus returns to original state.
- A kind of 2. pulse signal time difference measuring device according to claim 1, it is characterised in that the signal processing module Including：Burst pulse generation module, first for being that pulse width is Δ τ by the processing of the first signal and secondary signal of input are narrow Pulse signal and the second narrow pulse signal；High frequency sinusoidal signal generation module, for first narrow pulse signal and the processing of the second narrow pulse signal is high for first Frequently sinusoidal observed quantity signal and the second high frequency sinusoidal observed quantity signal.
- 3. a kind of pulse signal time difference measuring device according to claim 2, it is characterised in that the burst pulse produces mould Block, including straight to adjust laser driver, optical branching device, delay time difference be Δ τ two-way fibre delay line, photodetector and micro- Ripple XOR gate.
- A kind of 4. pulse signal time difference measuring device according to claim 2, it is characterised in that the high frequency sinusoidal signal Generation module, including ring oscillator, frequency divider and bandpass filter, the delay value of the gate circuit of the ring oscillator is Δ τ。
- A kind of 5. pulse signal time difference measuring device according to claim 1, it is characterised in that the reference clock module Phaselocked loop including reference clock and for frequency multiplication.
- A kind of 6. pulse signal time difference measuring device according to claim 1, it is characterised in that the phase-detect measurement module Including phase discriminator and analog-digital converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721054908.6U CN207123716U (en) | 2017-08-22 | 2017-08-22 | A kind of pulse signal time difference measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721054908.6U CN207123716U (en) | 2017-08-22 | 2017-08-22 | A kind of pulse signal time difference measuring device |
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| CN201721054908.6U Expired - Fee Related CN207123716U (en) | 2017-08-22 | 2017-08-22 | A kind of pulse signal time difference measuring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613815A (en) * | 2018-12-24 | 2019-04-12 | 北京无线电计量测试研究所 | A kind of time interval measurement device based on time-stretching |
| CN109656122A (en) * | 2019-03-01 | 2019-04-19 | 山东交通学院 | High-precision pulse time interval measurement method and circuit based on phase detection discriminator and RMS conversion device |
| 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 |
-
2017
- 2017-08-22 CN CN201721054908.6U patent/CN207123716U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613815A (en) * | 2018-12-24 | 2019-04-12 | 北京无线电计量测试研究所 | A kind of time interval measurement device based on time-stretching |
| CN109656122A (en) * | 2019-03-01 | 2019-04-19 | 山东交通学院 | High-precision pulse time interval measurement method and circuit based on phase detection discriminator and RMS conversion device |
| 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 |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180320 Termination date: 20180822 |