CN108169637A - Envelop detection apparatus based on integrated chip - Google Patents
Envelop detection apparatus based on integrated chip Download PDFInfo
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- CN108169637A CN108169637A CN201711453764.6A CN201711453764A CN108169637A CN 108169637 A CN108169637 A CN 108169637A CN 201711453764 A CN201711453764 A CN 201711453764A CN 108169637 A CN108169637 A CN 108169637A
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- integrated chip
- pass filtering
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- filtering module
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses the envelop detection apparatus based on integrated chip, including integrated chip, high-pass filtering module, low-pass filtering module, amplification module and detection module, the input terminal connection signal input of the integrated chip, the output terminal of integrated chip practices grade high-pass filtering module, high-pass filtering module connects low-pass filtering module, the low-pass filtering module connects amplification module, the amplification module connects detection module, the output terminal of detection chip installs low-pass filter additional, solve the problem of the superposition interference of high-frequency signal when envelope detection is carried out.
Description
Technical field
The present invention relates to a kind of envelop detection apparatus, and in particular to the envelop detection apparatus based on integrated chip.
Background technology
After gas-insulating and fully-enclosed combined electrical apparatus (GIS) is once electrification puts into operation, although the spy that faulty few reliability is high
Point, but the problem of be difficult to detect there is also incipient fault, UHF ultrahigh frequency partial discharges on-line monitoring technique is run as effectively detection
The technological means of the insulation status of middle GIS receives greatly to promote in recent years.
The electromagnetic wave signal frequency range generated due to shelf depreciation is mostly positioned at 0.3GHZ---1.5GHZ between, if acquired
Full discharge waveform, according to Nyquist law, the sample rate of data collecting system will at least reach 3GS/S, such ADC chips by
It is very difficult in the buying of the reasons such as embargo, that is, it is also very high to allow to procurement price.Therefore UHF partial discharges in the market are supervised online
It, can be by original signal by way of detection frequency reducing by the way of examining system carries out data acquisition after the detection frequency reducing again mostly
Frequency drops to tens MHZ grades from GHZ grades.
Common detection method has two kinds currently on the market：
Envelope detection technique based on diode.
Logarithmic detector technology based on integrated logarithmic detector chip.
Diode envelope detection detecting way principle is simple, and original signal envelope tracking effect is preferable, but this mode by
The limitation of diode, there are the shortcomings that dynamic range is small, sensitivity is low.
Although integrated logarithmic detector chip has the advantages of dynamic range is big, high sensitivity, but its output exists with input
Stringent linear relationship, and output area is small, if the precision of sampling A/D chip does not reach requirement or peripheral circuit processing is bad
If, the characteristics of high sensitivity, does not show not come out.
Invention content
Present invention aims at the envelop detection apparatus based on integrated chip is provided, solve carrying out envelope detection output letter
Number when, high-frequency signal superposition interference the problem of.
The present invention is achieved through the following technical solutions：
Envelop detection apparatus based on integrated chip including integrated chip, high-pass filtering module, low-pass filtering module, is put
Big module and detection module, the input terminal connection signal input of the integrated chip, the output terminal of integrated chip practice the filter of grade high pass
Wave module, high-pass filtering module connection low-pass filtering module, the low-pass filtering module connect amplification module, the amplification module
Detection module is connected, the output terminal of detection chip installs low-pass filter additional, solves when carrying out envelope detection output signal, high
The problem of superposition interference of frequency signal.
Further, the integrated chip is ADL5511 integrated chips.It is developed based on ripe integrated chip ADL5511,
Difference and early period, common diode and logarithmic detector technology, signal envelope tracked accurately in the market, and the distortion factor is low, perfection reflection
The envelope of Partial discharge signal in the output terminal of chip, if be not added with additional low-pass filter, can cause to fold in output signal
Add high-frequency signal, by the low-pass filter that RC is added to form, perfect can remove the high frequency noise ingredient being superimposed in output signal,
Obtain perfect signal envelope output.
Further, the high-pass filtering module uses active high-pass filter, and the advantages of this kind of wave filter is：In passband
Signal not only without energy dissipation, but also can amplify, load effect unobvious, multistage influences each other very little when being connected,
It is easy to form higher order filter, and wave filter is small using cascade straightforward procedure, it is light-weight, it does not need to shield.
Further, the low-pass filtering module cutoff frequency is 1500Mhz.Ensure that the effect of low-pass filtering is brighter
It is aobvious.
Further, the amplification module fixes amplification 40DB, and the amplification factor is conducive to envelope detected.
Compared with prior art, the present invention it has the following advantages and advantages：
1st, the present invention is based on the envelop detection apparatus of integrated chip, first, the envelope detection output in high-frequency signal is solved,
To reduce signal frequency, second is that solving the problems, such as the superposition interference of the envelope signal high frequency signal of output；
2nd, the present invention is based on the envelop detection apparatus of integrated chip, technology maturation, advantages；
3rd, the present invention is based on the envelop detection apparatus of integrated chip, wave filter it is small, light-weight, do not need to magnetic cup
It covers.
Description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is present system schematic diagram,
Fig. 2 is circuit diagram of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment
As shown in Figure 1, the present invention is based on the envelop detection apparatus of integrated chip, including integrated chip, high-pass filtering module,
Low-pass filtering module, amplification module and detection module, the integrated chip input terminal connection signal input, integrated chip it is defeated
Outlet practices grade high-pass filtering module, high-pass filtering module connection low-pass filtering module, the low-pass filtering module connection amplification mould
Block, the amplification module connect detection module, and the integrated chip is ADL5511 integrated chips, and the high-pass filtering module is adopted
With active high-pass filter, the low-pass filtering module cutoff frequency is 1500Mhz, and the amplification module fixes amplification 40DB.
The present invention passes through ripe ADL5511 integrated chips, difference and the early period of common diode and logarithm inspection in the market
Wave technology, signal envelope tracking is accurate, and the distortion factor is low, and perfection reflects the envelope of Partial discharge signal, in the output terminal of chip, if
Additional low-pass filter is not added with, overlapped high-frequency signal in output signal can be caused, by adding the low-pass filter of RC compositions,
The high frequency noise ingredient that can be superimposed in perfect removal output signal, obtains perfect signal envelope output, detection chip it is defeated
Outlet installs low-pass filter additional, solves the problem of the superposition interference of high-frequency signal when envelope detection is carried out.
Above-described specific embodiment has carried out the purpose of the present invention, technical solution and advantageous effect further
It is described in detail, it should be understood that the foregoing is merely the specific embodiment of the present invention, is not intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (5)
1. the envelop detection apparatus based on integrated chip, which is characterized in that including integrated chip, high-pass filtering module, low pass filtered
Wave module, amplification module and detection module, the input terminal connection signal input of the integrated chip, the output terminal of integrated chip are practiced
Grade high-pass filtering module, high-pass filtering module connection low-pass filtering module, the low-pass filtering module connects amplification module, described
Amplification module connects detection module.
2. the envelop detection apparatus according to claim 1 based on integrated chip, which is characterized in that the integrated chip is
ADL5511 integrated chips.
3. the envelop detection apparatus according to claim 1 based on integrated chip, which is characterized in that the high-pass filtering mould
Block uses passive high three-way filter.
4. the envelop detection apparatus according to claim 1 based on integrated chip, which is characterized in that the low-pass filtering mould
Block cutoff frequency is 1500Mhz.
5. the envelop detection apparatus according to claim 1 based on integrated chip, which is characterized in that the amplification module is consolidated
Surely amplify 40DB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711453764.6A CN108169637A (en) | 2017-12-28 | 2017-12-28 | Envelop detection apparatus based on integrated chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711453764.6A CN108169637A (en) | 2017-12-28 | 2017-12-28 | Envelop detection apparatus based on integrated chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108169637A true CN108169637A (en) | 2018-06-15 |
Family
ID=62518892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711453764.6A Pending CN108169637A (en) | 2017-12-28 | 2017-12-28 | Envelop detection apparatus based on integrated chip |
Country Status (1)
| Country | Link |
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| CN (1) | CN108169637A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426614A (en) * | 2019-08-28 | 2019-11-08 | 华北电力大学（保定） | A kind of ultrasonic partial discharge sensor of high-precision signal frequency down circuit design |
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| CN110426614B (en) * | 2019-08-28 | 2021-04-13 | 广州供电局有限公司 | Ultrasonic partial discharge sensor designed by high-precision signal frequency reduction circuit |
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Application publication date: 20180615 |