CN1210974A - Detecting method for arrival time of pulsed electromagnetic wave - Google Patents
Detecting method for arrival time of pulsed electromagnetic wave Download PDFInfo
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- CN1210974A CN1210974A CN 97109239 CN97109239A CN1210974A CN 1210974 A CN1210974 A CN 1210974A CN 97109239 CN97109239 CN 97109239 CN 97109239 A CN97109239 A CN 97109239A CN 1210974 A CN1210974 A CN 1210974A
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- 238000000034 method Methods 0.000 title description 4
- 238000001514 detection method Methods 0.000 claims description 8
- 238000001228 spectrum Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000006854 communication Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
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Abstract
The present invention belongs to electromagnetic wave measurement technology. Based on the statistical regularity of that electromagnetic wave to be measured, one characteristic frequency or very narrow characteristic frequency band, the main electromagnetic wave energy is determined, the detecting equipment has bandpass filter passing signal of the characteristic frequency or in the characteristic frequency band, and the peak value or some threshold point of output signal is calibrated in time so as to determine the arrival time of electromagnetic wave. The present invention reduces time calibration error caused by waveform change during electromagnetic wave transmission, and this can ensure that the pulsed electromagnetic wave time difference positioning and monitoring system has positioning error smaller than 1 Km within the effective covering range.
Description
The invention belongs to the electromagnetic wave measurement technology, specifically a kind of detection method of arrival time of pulsed electromagnetic wave.
Pulse electromagnetic wave is occurrent electromagnetic wave with powerful energy and broad spectrum scope, as thunder and lightning electromagnetic wave and nuclear blast electromagnetic wave.For its Detection Techniques, with the thunder and lightning electromagnetic wave is example, preestablish the lightening detection station, measuring the electromagnetic due in of thunder and lightning is its major function, existing technology is that the crest value of electromagnetic electric field of the thunder and lightning that receives or magnetic-field component or a certain threshold values are carried out time calibrating, thereby determines due in.This method will cause bigger measuring error to thunder and lightning time difference positioning monitoring system, because, the thunder and lightning electromagnetic wave is in communication process, not only amplitude has decay, and HFS wherein is faster than the low frequency part decay, make wave head (the electromagnetic wave starting point is to one section electromagnetic wave between the peak point) elongated, move after peak point or the threshold points, consequently with the difference of lightening detection station location, peak value or threshold points that lightning wave arrives each lightening detection station all have different displacements than original waveform, carry out the measuring error that time calibrating was produced with the method and generally can reach 1～4 μ s, with cause lightning location system to the location of lightning strike spot produce 2～4km than mistake.
The detection method that the purpose of this invention is to provide a kind of arrival time of pulsed electromagnetic wave can reduce in the pulse electromagnetic wave communication process because wave form varies is demarcated the error of bringing to its time.
The solution of the present invention is: according to characteristic frequency or the very narrow characteristic spectra of the electromagnetic statistical law to be measured of this kind in the past being determined an electromagnetic wave master energy part to be measured, in detecting devices, adopt the bandpass filter that this characteristic frequency or characteristic spectra are passed through to carry out filtering, the peak value of the signal of its output or a certain threshold points are carried out time calibrating determine the electromagnetic wave due in.
In the pulse electromagnetic wave propagation process, occupy the characteristic frequency of main energy or the more whole electromagnetic wave of distortion of characteristic spectra and be out of shape much smaller.The present invention only carries out time calibrating to the electromagnetic peak point or a certain threshold points of this frequency or frequency range, the low-and high-frequency of pulse electromagnetic wave in the communication process inconsistency that partly decays is reduced the influence of time calibrating, thereby reduce error, can guarantee that the positioning error of pulse time difference positioning monitoring system in effective coverage range is less than 1km.
Oscillogram when accompanying drawing is pulse electromagnetic wave propagation different distance.
By accompanying drawing as can be seen, pulse electromagnetic wave amplitude in communication process has decay, and its wave head is also constantly elongated, moves after causing peak point.But the frequency range of pulse electromagnetic wave master energy part is a very narrow scope with respect to entire spectrum, and the wave form varies of main energy waves is relatively very little in communication process.Utilize this rule, at first determine the characteristic frequency of pulse electromagnetic wave master energy part or near the very narrow characteristic spectra the characteristic frequency point, concerning the thunder and lightning electromagnetic wave, this characteristic spectra is generally 10～100kH, again with causing character filter or analog filter carries out bandpass filtering to the pulse electromagnetic wave that receives, peak point or a certain threshold points to its output waveform are carried out time calibrating, determine arrival time of pulsed electromagnetic wave.
Claims (1)
1, a kind of detection method of arrival time of pulsed electromagnetic wave, it is characterized in that according to characteristic frequency or the very narrow characteristic spectra of the electromagnetic statistical law to be measured of this kind in the past being determined an electromagnetic wave master energy part, in detecting devices, adopt the bandpass filter that this characteristic frequency or characteristic spectra are passed through to carry out filtering, the peak value of its output signal or a certain threshold points are carried out time calibrating determine the electromagnetic wave due in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97109239 CN1077682C (en) | 1997-09-11 | 1997-09-11 | Detecting method for arrival time of pulsed electromagnetic wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97109239 CN1077682C (en) | 1997-09-11 | 1997-09-11 | Detecting method for arrival time of pulsed electromagnetic wave |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1210974A true CN1210974A (en) | 1999-03-17 |
| CN1077682C CN1077682C (en) | 2002-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97109239 Expired - Lifetime CN1077682C (en) | 1997-09-11 | 1997-09-11 | Detecting method for arrival time of pulsed electromagnetic wave |
Country Status (1)
| Country | Link |
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| CN (1) | CN1077682C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298097A (en) * | 2011-07-15 | 2011-12-28 | 华中科技大学 | Method for estimating thunder impulse signal Time Difference of Arrival (TDOA) |
| CN110346755A (en) * | 2019-07-10 | 2019-10-18 | 四川中电昆辰科技有限公司 | A kind of signal amplitude detection device and method and its arrival time modification method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101539599B (en) * | 2009-04-14 | 2011-10-05 | 国网电力科学研究院 | Digital lightning detection method and device thereof |
-
1997
- 1997-09-11 CN CN 97109239 patent/CN1077682C/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298097A (en) * | 2011-07-15 | 2011-12-28 | 华中科技大学 | Method for estimating thunder impulse signal Time Difference of Arrival (TDOA) |
| CN102298097B (en) * | 2011-07-15 | 2013-02-13 | 华中科技大学 | Method for estimating thunder impulse signal Time Difference of Arrival (TDOA) |
| CN110346755A (en) * | 2019-07-10 | 2019-10-18 | 四川中电昆辰科技有限公司 | A kind of signal amplitude detection device and method and its arrival time modification method |
| CN110346755B (en) * | 2019-07-10 | 2023-06-27 | 四川中电昆辰科技有限公司 | Signal amplitude detection device and method and arrival time correction method thereof |
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| Publication number | Publication date |
|---|---|
| CN1077682C (en) | 2002-01-09 |
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