CN1077682C - Detecting method for arrival time of pulsed electromagnetic wave - Google Patents
Detecting method for arrival time of pulsed electromagnetic wave Download PDFInfo
- Publication number
- CN1077682C CN1077682C CN 97109239 CN97109239A CN1077682C CN 1077682 C CN1077682 C CN 1077682C CN 97109239 CN97109239 CN 97109239 CN 97109239 A CN97109239 A CN 97109239A CN 1077682 C CN1077682 C CN 1077682C
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- electromagnetic wave
- characteristic frequency
- thunder
- lightning
- arrival time
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- 238000000034 method Methods 0.000 title claims description 6
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 8
- 238000001228 spectrum Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000006854 communication Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
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- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The present invention belongs to an electromagnetic wave measuring technology. The characteristic frequency or the ultra narrow characteristic frequency band of an electromagnetic wave main energy part is determined according to the statistical rules of original electromagnetic waves to be measured. A band pass filter for the characteristic frequency or the ultra narrow characteristic frequency band to pass through simply is used for filtration in a detecting device, and the arrival moment of electromagnetic waves is determined through the time calibration of the peak value or a threshold point of a signal output by the filter. The present invention can reduce errors in the time calibration caused by waveform change in pulse electromagnetic wave transmission, and can ensure the positioning error of a pulse electromagnetic wave time difference positioning and monitoring system to be smaller than 1 km in an effective coverage range.
Description
The invention belongs to the electromagnetic wave measurement technology, specifically a kind of detection method of thunder and lightning electromagnetic wave due in.
The thunder and lightning electromagnetic wave is occurrent electromagnetic wave with broad spectrum scope of powerful energy, for its Detection Techniques, 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 value 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 point, consequently with the difference of lightening detection station location, peak value or threshold point 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 thunder and lightning electromagnetic wave due in can reduce in the thunder and lightning electromagnetic wave propagation process because wave form varies is demarcated the error of bringing to its time.
The solution of the present invention is: characteristic frequency or the very narrow characteristic spectra of the thunder and lightning electromagnetic wave being determined this electromagnetic wave master energy part with statistical method, 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 point are carried out time calibrating determine the electromagnetic wave due in.
In thunder and lightning 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 point of this frequency or frequency range, the low-and high-frequency of thunder and lightning 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 thunder and lightning time difference positioning monitoring system in effective coverage range is less than 1km.
Oscillogram when accompanying drawing is thunder and lightning electromagnetic wave propagation different distance.
By accompanying drawing as can be seen, thunder and lightning 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 thunder and lightning 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 thunder and lightning 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 10～100kHz, with digital filter or analog filter the thunder and lightning electromagnetic wave that receives is carried out bandpass filtering again, peak point or a certain threshold point to its output waveform are carried out time calibrating, determine thunder and lightning electromagnetic wave due in.
Claims (1)
- A kind of detection method of thunder and lightning electromagnetic wave due in, this electromagnetic peak value or a certain threshold point are carried out time calibrating determine electromagnetic wave time of arrival, it is characterized in that the thunder and lightning electromagnetic wave, determine this electromagnetic wave master energy characteristic frequency or very narrow characteristic spectra partly with the method for statistics, in detecting devices, adopt the bandpass filter that this characteristic frequency or characteristic spectra are passed through to carry out filtering.
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 CN1210974A (en) | 1999-03-17 |
| CN1077682C true CN1077682C (en) | 2002-01-09 |
Family
ID=5171049
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 |
|---|---|
| CN (1) | CN1077682C (en) |
Cited By (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 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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) |
| 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 |
-
1997
- 1997-09-11 CN CN 97109239 patent/CN1077682C/en not_active Expired - Lifetime
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1210974A (en) | 1999-03-17 |
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Owner name: WUHAN HIGH VOLTAGE RESEARCH INSTITUTE OF SGCC Free format text: FORMER OWNER: NEW TECHNOLOGY CO., WUHAN HIGH-VOLTAGE INST. Effective date: 20061229 |
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Effective date of registration: 20061229 Address after: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Patentee after: Guowang Wuhan High Voltage Inst Address before: 430074 Hubei city of Wuhan province Wuchang Luo Yu Road, No. 143 Patentee before: New Technology Co., Wuhan High Voltage Inst. |
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Owner name: STATE NETWORK ELECTRIC POWER RESEARCH INSTITUTE Free format text: FORMER OWNER: WUHAN HIGH VOLTAGE RESEARCH INSTITUTE OF STATE GRID Effective date: 20100504 Owner name: WUHAN NARI CO,. LTD. OF STATE GRID ELECTRIC POWER |
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Free format text: CORRECT: ADDRESS; FROM: 430074 NO.143, LUOYU ROAD, HONGSHAN DISTRICT, WUHAN CITY, HUBEI PROVINCE TO: 210003 NO.8, NANRUI ROAD, NANJING CITY, JIANGSU PROVINCE |
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Effective date of registration: 20100504 Address after: Nanjing City, Jiangsu Province, 210003 South Shui Road No. 8 Co-patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Patentee after: State Grid Electric Power Research Insititute Address before: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Patentee before: Guowang Wuhan High Voltage Inst |
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Effective date of registration: 20160704 Address after: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Address before: Nanjing City, Jiangsu Province, 210003 South Shui Road No. 8 Patentee before: State Grid Electric Power Research Insititute Patentee before: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute |
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