CN203101289U - Insulator dirtiness detecting device based on microwave radiation dual-channel measuring technique - Google Patents
Insulator dirtiness detecting device based on microwave radiation dual-channel measuring technique Download PDFInfo
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- CN203101289U CN203101289U CN 201220496066 CN201220496066U CN203101289U CN 203101289 U CN203101289 U CN 203101289U CN 201220496066 CN201220496066 CN 201220496066 CN 201220496066 U CN201220496066 U CN 201220496066U CN 203101289 U CN203101289 U CN 203101289U
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Abstract
The utility model discloses an insulator dirtiness detecting device based on a microwave radiation dual-channel measuring technique. The insulator dirtiness detecting device comprises an antenna (1) which is used for receiving an energy signal from the microwave band 35GHz frequency of insulator dirtiness, a horizontal/vertical polarization separator (2) which is used for separating the signal received by the antenna (1) into horizontal and vertical polarization signals, and a change-over switch (3) which is used for comparing a signal provided by the polarization separator (2) with a reference signal provided by a reference loader (16) under driving. High frequency amplification, frequency mixing, intermediate frequency amplification, wave detection, low frequency amplification, synchronous wave detection and integral processing are respectively carried out on the horizontally and vertically polarized microwave signals provided by the polarization separator (2) and the switch (3) and then measured data is output through a digital display (11). According to the insulator dirtiness detecting device based on the microwave radiation dual-channel measuring technique, online outage-free non-contact insulator dirtiness measurement can be carried out.
Description
Technical field
The utility model relates to detection technique, more specifically to a kind of insulator contamination pick-up unit based on microwave radiation binary channels measuring technique.
Background technology
Insulator contamination detects for the filthy state of determining insulator extremely important, and is by detecting the insulator contamination degree effectively, significant for the reasonable formulation interruption maintenance time.Carry out the insulator contamination detection too much, just need often to have a power failure, and it is too much to detect the possibility contamination, forms potential safety hazard very fewly.In the high voltage and insulation technology field, the detection technique of insulator contamination is the research focus always.Judge the gradation for surface pollution of insulator by detecting insulator contamination,, rationally arrange interruption maintenance, can determine the insulator contamination state timely and accurately, reduce the pollution flashover discharge, produce significant power system security so that determine the filthy cleaning time.
The utility model content
The technical problems to be solved in the utility model provides a kind of insulator contamination pick-up unit, can promptly and accurately detect insulator contamination effectively.
The above-mentioned technical matters of the utility model solves like this, constructs a kind of insulator contamination pick-up unit based on microwave radiation binary channels measuring technique, comprising: square-wave generator; First switch driver and second switch driver by the square-wave generator driving; Be used to receive antenna from the energy signal of the microwave section 35GHz frequency range of insulator contamination; Be used for the signal that antenna receives is divided into the horizontal vertical polarization separator of level and vertical polarization signal; Being used under driving contrast polarization separator provides the switch of the reference signal that signal and reference load device provide; First height that the microwave signal of horizontal vertical polarization separator output is amplified is put; The local oscillator of local oscillated signal is provided; The local oscillation signal and first height are put first frequency mixer that output signal down-converts to first intermediate-freuqncy signal; Second height that the microwave signal of switch output is amplified is put: the local oscillation signal and second height are put second mixing that output signal down-converts to second intermediate-freuqncy signal; With first intermediate-freuqncy signal carry out that intermediate frequency amplifies first in put; With second intermediate-freuqncy signal carry out that intermediate frequency amplifies second in put; In first, put the first detector that the output signal detection is first low frequency signal; In second, put the second detector that the output signal detection is second low frequency signal; To further first low the putting of amplifying of the low frequency signal behind the first detector; To further second low the putting of amplifying of the low frequency signal behind the second detector; Provide synchronizing signal to hang down by the second switch driver and put first lock detector that the output signal synchronous detection is a direct current signal first; Provide synchronizing signal to hang down by the second switch driver and put second lock detector that the output signal synchronous detection is a direct current signal second; The first lock detector output signal is carried out final signal to be detected and the first integrator of handling; The second lock detector output signal is carried out final signal to be detected and the second integral device of handling; Be used for digital indicator that first and second measurement data are read and show.
Implement a kind of insulator contamination pick-up unit that the utility model provides based on microwave radiation binary channels measuring technique, utilize this pick-up unit can carry out online, do not have a power failure, the measurement of non-contacting insulator contamination degree.
Description of drawings
Fig. 1 is the structural representation of a kind of insulator contamination pick-up unit based on microwave radiation binary channels measuring technique of the utility model.
Embodiment
The utility model by receiving the electromagnetic energy of insulator surface dunghill in the radiation of microwave section, carries out the radiation brightness of telemeasurement insulator contamination based on the microwave radiometry theory, further calculates the pollution level of insulator according to bright temperature.According to blackbody radiation law, any object that is higher than the absolute temperature zero degree also absorbs the electromagnetic energy that other objects are launched simultaneously all at the electromagnetic energy of constantly launching each frequency range.
A kind of insulator contamination pick-up unit that the utility model provides based on microwave radiation binary channels measuring technique, be specifically designed to the emittance of reception near insulator surface (filth) microwave (millimeter wave) section 35GHz, by size and the character of measuring its emittance, pass judgment on insulator contamination state (grade).As shown in Figure 1, emittance from insulator surface (filth) is received by antenna, received signal is divided into two-way by the horizontal vertical polarization separator,, finally obtains the two-way direct current signal respectively by mixing, amplification, detection with main treatment circuit such as amplify once more.The size of this two-way direct-flow signal voltage has reflected the attribute of insulator contamination.Because filthy equivalent salt density (ESDD) and equivalent ash close (NSDD) interact, all influence the size of emittance, therefore, the two-way direct current signal size that obtains is represented the difference of emittance on level and vertical polarization directions, as measuring filthy raw data, be used for determining filthy state.In theory,, carry out Inversion Calculation, obtain the state of insulator contamination, and on engineering, can directly obtain filthy state by fit equation by the bright temperature computing formula of insulator contamination surface emissivity according to measurement result.No matter inverting is found the solution still is that fit equation is directly found the solution, and can be further used for engineering reality by calculating insulator contamination state (grade), to grasp the filthy state of insulator.
As shown in Figure 1, in the composition frame chart of a kind of insulator contamination pick-up unit based on microwave radiation binary channels measuring technique that the utility model provides, antenna 1 is used to receive the energy from the microwave section 35GMz frequency range of insulator contamination; Horizontal vertical polarization separator 2 is used for the signal that antenna 1 receives is divided into level and vertical polarization signal, enters horizontal polarization processing and vertical polarization respectively and handles; Switch 3: be used to contrast the conversion that receives signal and reference signal from polarization separator 2, wherein reference signal is provided by reference load 16; In the horizontal polarization processing procedure, comprise that first height puts (first radio-frequency amplifier) 41: be used for microwave signal is amplified; First frequency mixer 51: be used for the signal of first high frequency output is down-converted to first intermediate-freuqncy signal; First detector 71 is used for first output signal of putting (first intermediate frequency amplifier) 61 is become first low frequency signal; First low puts 81, is used for the low frequency signal behind the first detector (71) is further amplified; First lock detector 91 is used for further hanging down discharge signal and is converted to direct current signal; The first duty device 101 is used to realize final input and processing; Digital indicator 11 is the last reading displayed unit of measurement data.In the vertical polarization processing procedure, signal puts 42 through second height, is used for the microwave signal that switch 3 provides is amplified; Second frequency mixer 52 is used for the signal of second high frequency, 42 outputs is down-converted to second intermediate-freuqncy signal; Second detector 72 is used for putting 62 output signal with second and becomes second low frequency signal; Second low puts 82, is used for the low frequency signal behind the second detector 72 is further amplified; Second lock detector 92 is used for further hanging down discharge signal and is converted to direct current signal; Second integral device 102 is used to realize final input and processing; Digital indicator 11 is connected with first and second integrators respectively, and measurement data is carried out last read and showing.
The device that utilizes the utility model to provide has carried out the experimental study of artificial filth and natural contamination on XP-70 type insulator, measured the relation of ESDD or NSDD and radiation brightness.Under dry and wet condition, measurement result is constructed fit equation, can solve ESDD and NSDD.Its result shows that radiation brightness can accurately reflect the filthy state of insulator.Under the given condition of measuring condition, its result can be used for that engineering is actual comes online detection insulator contamination.Have real-time, noncontact and be not subjected to the characteristics of line voltage distribution influence of fluctuations based on the microwave radiometry method.
Fit equation
In the formula:
Be the output result that horizontal polarization is measured branch road;
Be the output result that vertical polarization is measured branch road; ESDD is an equivalent salt density; NSDD is that equivalent ash is close; K, K ' is respectively fitting coefficient; C, d, c ', d ' are respectively the power exponent of fit equation.According to fit equation, with measurement result substitution equation, just solving an equation can be in the hope of ESDD and NSDD value, thereby determines the insulator contamination situation.
In conjunction with the accompanying drawings embodiment of the present utility model is described above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; not breaking away under the scope situation that the utility model aim and claim protect, also can make a lot of forms, these all belong within the protection of the present utility model.
Claims (1)
1. the insulator contamination pick-up unit based on microwave radiation binary channels measuring technique is characterized in that, comprising:
Square-wave generator;
First switch driver and second switch driver (14) by the square-wave generator driving;
Be used to receive antenna (1) from the energy signal of the microwave section 35GHZ frequency range of insulator contamination;
Be used for the signal that antenna (1) receives is divided into the horizontal vertical polarization separator (2) of level and vertical polarization signal;
Being used for contrasting under driving polarization separator (2) provides the switch (3) of the reference signal that signal and reference load device (16) provide;
First height that the microwave signal of horizontal vertical polarization separator (2) output is amplified is put (41);
The local oscillator (15) of local oscillated signal is provided;
The local oscillation signal and first height are put first frequency mixer (51) that (41) output signal down-converts to first intermediate-freuqncy signal;
Second height that the microwave signal of switch (3) output is amplified is put (42):
The local oscillation signal and second height are put second mixing (52) that (42) output signal down-converts to second intermediate-freuqncy signal;
With first intermediate-freuqncy signal carry out that intermediate frequency amplifies first in put (61);
With second intermediate-freuqncy signal carry out that intermediate frequency amplifies second in put (62);
In first, put the first detector (71) that (61) output signal detection is first low frequency signal;
In second, put the second detector (72) that (62) output signal detection is second low frequency signal;
To further first low put (81) of amplifying of the low frequency signal behind the first detector;
To further second low put (82) of amplifying of the low frequency signal behind the second detector;
Provide synchronizing signal to hang down by second switch driver (14) and put first lock detector (91) that (81) output signal synchronous detection is a direct current signal first;
Provide synchronizing signal to hang down by second switch driver (14) and put second lock detector (92) that (82) output signal synchronous detection is a direct current signal second;
First lock detector (91) output signal is carried out final signal to be detected and the first integrator of handling (101);
Second lock detector (92) output signal is carried out final signal to be detected and the second integral device of handling (102);
Be used for digital indicator (11) that first and second measurement data are read and show.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220496066 CN203101289U (en) | 2012-09-26 | 2012-09-26 | Insulator dirtiness detecting device based on microwave radiation dual-channel measuring technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220496066 CN203101289U (en) | 2012-09-26 | 2012-09-26 | Insulator dirtiness detecting device based on microwave radiation dual-channel measuring technique |
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| Publication Number | Publication Date |
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| CN203101289U true CN203101289U (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220496066 Expired - Lifetime CN203101289U (en) | 2012-09-26 | 2012-09-26 | Insulator dirtiness detecting device based on microwave radiation dual-channel measuring technique |
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| CN (1) | CN203101289U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726882A (en) * | 2019-10-15 | 2020-01-24 | 博微太赫兹信息科技有限公司 | Dual-polarization radiometer suitable for passive security check instrument |
| CN111509404A (en) * | 2020-04-07 | 2020-08-07 | 成都锦江电子系统工程有限公司 | Multifunctional phased array antenna for satellite broadcast data reception and wind profile measurement |
| CN113095499A (en) * | 2021-03-26 | 2021-07-09 | 云南电网有限责任公司电力科学研究院 | Insulator equivalent salt deposit density prediction method |
-
2012
- 2012-09-26 CN CN 201220496066 patent/CN203101289U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726882A (en) * | 2019-10-15 | 2020-01-24 | 博微太赫兹信息科技有限公司 | Dual-polarization radiometer suitable for passive security check instrument |
| CN111509404A (en) * | 2020-04-07 | 2020-08-07 | 成都锦江电子系统工程有限公司 | Multifunctional phased array antenna for satellite broadcast data reception and wind profile measurement |
| CN113095499A (en) * | 2021-03-26 | 2021-07-09 | 云南电网有限责任公司电力科学研究院 | Insulator equivalent salt deposit density prediction method |
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Granted publication date: 20130731 |