CN107086341B - A kind of high power transmission waveguide arcing protective device based on envelope waveform feature - Google Patents
A kind of high power transmission waveguide arcing protective device based on envelope waveform feature Download PDFInfo
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- CN107086341B CN107086341B CN201710266502.2A CN201710266502A CN107086341B CN 107086341 B CN107086341 B CN 107086341B CN 201710266502 A CN201710266502 A CN 201710266502A CN 107086341 B CN107086341 B CN 107086341B
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- Prior art keywords
- transmission waveguide
- waveform
- signal
- high power
- detection
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/30—Auxiliary devices for compensation of, or protection against, temperature or moisture effects ; for improving power handling capability
Abstract
The high power transmission waveguide arcing protective device based on envelope waveform feature that the invention discloses a kind of; including microwave detector, low-pass filter, waveform processing judgment module; front end connects the coupler in transmission waveguide, and rear end is connected to power drive and power supply system；Forward and reverse microwave signal extraction is carried out by the high power coupler of corresponding band, obtains envelope waveform by microwave detector detection；Under the premise of guaranteeing detection basic waveform, the harmonic signal in burr above waveform detection, other clutters or detection process is filtered out by low-pass filter；By filtered envelope waveform, waveform processing and judgement are carried out, passes through collapsing in monitoring envelope waveform or recess feature, the purpose of Lai Shixian high power transmission waveguide arcing protection；After giving normal pulsewidth, repetition rate and level range, waveform sampling is constantly carried out, and by level comparative analysis, when air breakdown sparking occurs and leads to amplitude exception in pulse, the optical signal of submitting protection in time.
Description
Technical field
The present invention relates to microwave high power technology, especially a kind of high power transmission waveguide based on envelope waveform feature is beaten
Fiery protective device.
Background technique
HIGH-POWERED MICROWAVES is widely used in electronic communication, plasma heating, controlled thermonuclear fusion, industrial materials processing
Equal fields, have highly important application prospect.In above-mentioned various microwave systems, it can be related to HIGH-POWERED MICROWAVES signal and exist
Transmission problem in transmission waveguide.Since energy density is larger in transmission waveguide, temperature, the humidity of environment, waveguide are resistant to field strength,
The factors such as load condition variation are all likely to result in air breakdown sparking, and transmission waveguide or microwave source are likely to result in when serious
Equipment damage brings extremely serious consequence.Therefore the Protection of arcing in high power transmission waveguide is carried out, timely rupturing duty swashs
It encourages and power-supply system, the reliability for improving high-power system is of great significance.
In current transmission waveguide Protection of arcing means, the most commonly used is vswr protection mode is based on, pass through bidirectional couple
Forward direction, reverse signal in device extraction transmission waveguide, and detect the ratio V of forward and reverse Coupled Signal PowerIt is positive/VReflection, when being lower than
When certain threshold value, that is, think that standing-wave ratio is excessive.But for different high power transmission systems, working frequency, coupler frequency
Curve is rung, needs to carry out cumbersome frequency response correction and test job.In addition also there is the harmonic detecting protection hand based on frequency domain character
Section causes new frequency spectrum ingredient since the air breakdown space plasma to be formed of striking sparks can modulate forward and reverse transmission wave.But
This detection means device is complicated, needs the low-frequency detector of the filter that edge is precipitous and Larger Dynamic range, as high dynamic is examined
Wave diode etc..
Summary of the invention
The high power transmission waveguide arcing protective device based on envelope waveform feature that the present invention provides a kind of, device letter
Single generalization can be realized and complete protection response in air breakdown sparking just issue gsec, solve traditional standing wave guarantor
Shield, the deficiency of harmonic detecting mode, can improve the reliability of HIGH-POWERED MICROWAVES Transmission system.
Technical scheme is as follows:
A kind of high power transmission waveguide arcing protective device based on envelope waveform feature, it is characterised in that: the big function
Coupler in the signal input part connection transmission waveguide of rate transmission waveguide Protection of arcing device, high power transmission waveguide arcing are protected
The signal output end of protection unit is connected to power drive and power supply system；It is described when the sparking of transmission waveguide air breakdown occurs
High power transmission waveguide arcing protective device sends out protection optical signal to power drive and power supply system, and it is dynamic to complete protection response
Make；
Including microwave detector, low-pass filter, waveform processing judgment module, the signal input part of microwave detector passes through
Microwave transmission cable connects the signal output end of front end coupler, the signal of the input terminal connection microwave detector of low-pass filter
Output end, the signal output end of the signal input part connection low-pass filter of waveform processing judgment module, waveform processing judge mould
The signal output end of block is connected to power drive and power supply system.
The coupler is great power bidirectional coupler, for extracting the forward direction in transmission waveguide, reverse signal, coupler
Broadband character it is consistent with working frequency range.
The microwave detector to transmitted by microwave transmission cable forward direction, reverse signal carry out detection, pass through envelope
Detection obtains waveform detection；The working frequency of the microwave detector is consistent with working frequency range, and has biggish video bandwidth,
Can be suitably used for short pulse to CW operating mode Transmission system.
Under the premise of guaranteeing detection basic waveform, the low-pass filter is for filtering out burr above waveform detection, clutter
Or the harmonic signal in detection process, it avoids acquiring waveform subsequent and handling judging to impact；According to waveform detection spy
Property optimization design, the low-pass filter chooses suitable cutoff frequency.
The design philosophy of the high power transmission waveguide arcing protective device is the envelope waveform detection means based on time domain,
Compared to the harmonic detecting based on spectrum harmonics feature, structure is simpler.It is tested according to literature survey and real system, transmission wave
It leads sparking to correspond on waveform detection, most apparent feature is exactly that pulse detection waveform collapses or is recessed.Transmission waveguide sparking
Protective device is to pass through the variation of monitoring wave level, Lai Shixian Protection of arcing.The waveform processing judgment module is transmission wave
The important link in Protection of arcing device is led, the rectified signal after low pass low-pass filter is analyzed and processed and is sentenced
It is disconnected, specifically: after giving normal pulse width, repetition rate and level range, wave-shape amplitude is constantly acquired by ADC,
And compared by level analysis, when being struck sparks due to transmission waveguide air breakdown and lead to amplitude exception in pulse, send out in time
Protect signal.
Beneficial effects of the present invention are as follows:
The present invention is based on time domain waveform features, devise a kind of transmission waveguide Protection of arcing scheme of simple general-purpose, phase
Than eliminating complicated frequency response correcting process and test in traditional standing wave detection scheme；By many experiments test and verification, tool
There are higher accuracy and validity, can quickly cut off power supply system within the time of several microseconds；It can be suitable for various frequency ranges
HIGH-POWERED MICROWAVES Transmission system simply and has general applicability.
Detailed description of the invention
Fig. 1 is the principle of the present invention schematic diagram.
Appended drawing reference in figure are as follows: 1-microwave transmission cable, 2-microwave detectors, 3-low-pass filters, at 4-waveforms
Manage judgment module.
Specific embodiment
A kind of high power transmission waveguide arcing protective device based on envelope waveform feature, the high power transmission waveguide are beaten
Coupler in the signal input part connection transmission waveguide of fiery protective device, the signal of high power transmission waveguide arcing protective device
Output end is connected to power drive and power supply system；When the sparking of transmission waveguide air breakdown occurs, the high power transmission wave
It leads Protection of arcing device and sends out protection optical signal to power drive and power supply system, complete protection response action.
The high power transmission waveguide arcing protective device includes that microwave detector 2, low-pass filter 3, waveform processing are sentenced
Disconnected module 4, the signal input part of microwave detector 2 connects the signal output end of front end coupler by microwave transmission cable 1, low
The signal output end of the input terminal connection microwave detector 2 of bandpass filter 3, the signal input part of waveform processing judgment module 4 connect
The signal output end of low-pass filter 3 is connect, the signal output end of waveform processing judgment module 4 is connected to power drive and power supply system
System.
As shown in Figure 1, designing the high-power of corresponding bandwidth according to the working frequency range of HIGH-POWERED MICROWAVES Transmission system first
Coupler is realized to extraction positive, reverse signal in transmission waveguide, then realizes envelope detection by microwave detector 2, obtain
To the time domain waveform of transmission.The working frequency of microwave detector 2 also should be consistent with working frequency range, and has biggish video tape
It is wide.
Waveform detection filters out humorous in burr therein and other clutters or detection process subsequently through low-pass filter 3
Wave signal avoids impacting waveform processing.Rectified signal after low-pass filter 3 is sent into waveform processing and judges mould
Block 4 is analyzed.The processing of transmission waveguide Protection of arcing device judges that thinking is the envelope waveform detection means based on time domain, needle
It collapses to waveform detection or recess feature.I.e. by the variation of monitoring wave level, to realize detection and protection.It is giving just
After normal pulse width, repetition rate and level range, compare by constantly acquiring wave-shape amplitude, and by level analysis, when
When leading to amplitude exception in pulse due to the sparking of air breakdown transmission waveguide, timely submitting protection signal to power supply system, quickly
Cutoff high system, protect HIGH-POWERED MICROWAVES system safety.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to preferred embodiment, those skilled in the art should understand that, it can be right
Technical solution of the present invention is modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention,
It is intended to be within the scope of the claims of the invention.
Claims (5)
1. a kind of high power transmission waveguide arcing protective device based on envelope waveform feature, it is characterised in that: described high-power
Coupler in the signal input part connection transmission waveguide of transmission waveguide Protection of arcing device, the protection of high power transmission waveguide arcing
The signal output end of device is connected to power drive and power supply system；It is described big when the sparking of transmission waveguide air breakdown occurs
Power transmission waveguide arcing protective device sends out protection optical signal to power drive and power supply system, completes protection response action；
The high power transmission waveguide arcing protective device includes that microwave detector (2), low-pass filter (3), waveform processing judge mould
Block (4), the signal input part of microwave detector (2) connect the signal output end of front end coupler by microwave transmission cable (1),
The signal output end of input terminal connection microwave detector (2) of low-pass filter (3), the signal of waveform processing judgment module (4)
Input terminal connects the signal output end of low-pass filter (3), and the signal output end of waveform processing judgment module (4) is connected to power
Excitation and power supply system.
2. the high power transmission waveguide arcing protective device according to claim 1 based on envelope waveform feature, feature
Be: the coupler is great power bidirectional coupler, for extracting the forward direction in transmission waveguide, reverse signal, coupler
Broadband character is consistent with the working frequency range of forward direction, reverse signal in transmission waveguide.
3. the high power transmission waveguide arcing protective device according to claim 1 based on envelope waveform feature, feature
Be: the microwave detector (2) carries out detection to the forward direction by microwave transmission cable (1) transmission, reverse signal, passes through packet
Network detection obtains waveform detection；The working frequency of the microwave detector (2) is transmitted positive, anti-with microwave transmission cable (1)
Working frequency range to signal is consistent, and have biggish video bandwidth, can be suitably used for short pulse to CW operating mode transmission system
System.
4. the high power transmission waveguide arcing protective device according to claim 1 based on envelope waveform feature, feature
Be: under the premise of guaranteeing detection basic waveform, the low-pass filter (3) is for filtering out burr above waveform detection, clutter
Or the harmonic signal in detection process, it avoids acquiring waveform subsequent and handling judging to impact；According to waveform detection spy
Property optimization design, the low-pass filter (3) chooses suitable cutoff frequency.
5. the high power transmission waveguide arcing protective device according to claim 1 based on envelope waveform feature, feature
Be: the waveform processing judgment module (4) is the important link in transmission waveguide Protection of arcing device, to by low pass low pass
Rectified signal after filter (3) is analyzed and processed and judges, specifically: giving normal pulse width, repetition rate
After level range, compare by constantly acquiring wave-shape amplitude, and by level analysis, is beaten when due to transmission waveguide air breakdown
Fire and when leading to amplitude exception in pulse, send out protection signal in time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710266502.2A CN107086341B (en) | 2017-04-21 | 2017-04-21 | A kind of high power transmission waveguide arcing protective device based on envelope waveform feature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710266502.2A CN107086341B (en) | 2017-04-21 | 2017-04-21 | A kind of high power transmission waveguide arcing protective device based on envelope waveform feature |
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| CN107086341A CN107086341A (en) | 2017-08-22 |
| CN107086341B true CN107086341B (en) | 2019-05-24 |
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| CN201710266502.2A Expired - Fee Related CN107086341B (en) | 2017-04-21 | 2017-04-21 | A kind of high power transmission waveguide arcing protective device based on envelope waveform feature |
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| CN107086341B (en) * | 2017-04-21 | 2019-05-24 | 中国工程物理研究院电子工程研究所 | A kind of high power transmission waveguide arcing protective device based on envelope waveform feature |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865623A (en) * | 2016-04-15 | 2016-08-17 | 中国工程物理研究院电子工程研究所 | Quick detecting and protecting system for large-power microwave air breakdown |
| CN107086341A (en) * | 2017-04-21 | 2017-08-22 | 中国工程物理研究院电子工程研究所 | A kind of high power transmission waveguide arcing protection device based on envelope waveform feature |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865623A (en) * | 2016-04-15 | 2016-08-17 | 中国工程物理研究院电子工程研究所 | Quick detecting and protecting system for large-power microwave air breakdown |
| CN107086341A (en) * | 2017-04-21 | 2017-08-22 | 中国工程物理研究院电子工程研究所 | A kind of high power transmission waveguide arcing protection device based on envelope waveform feature |
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