CN203630275U - Device for acquiring broadband ultrasonic signal - Google Patents
Device for acquiring broadband ultrasonic signal Download PDFInfo
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- CN203630275U CN203630275U CN201320662978.5U CN201320662978U CN203630275U CN 203630275 U CN203630275 U CN 203630275U CN 201320662978 U CN201320662978 U CN 201320662978U CN 203630275 U CN203630275 U CN 203630275U
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- prime amplifier
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- sonac
- ultrasonic
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- 230000004044 response Effects 0.000 claims abstract description 14
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 41
- 230000000694 effects Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 230000008439 repair process Effects 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012502 risk assessment Methods 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
In order to solve the problem that the response frequency band of a sensor is not enough in ultrasonic partial discharge detection so as to cause ultrasonic signal waveform distortion, the utility model provides a device for acquiring a broadband ultrasonic signal. The device is composed of a first ultrasonic sensor, a first preamplifier, a second ultrasonic sensor, a second amplifier, a resistor and a signal output terminal. The device has the following beneficial effects that an ultrasonic signal sensing device with a wide frequency response range is obtained by combining common narrowband sensors; signal waveform distortion caused by the ultrasonic sensing device is avoided; signal waveform characteristics can be kept while an ultrasonic signal is acquired, and a basis is provided for diagnosing the internal state of GIS equipment according to waveform characteristics of ultrasonic signals.
Description
Technical field
The utility model belongs to Cubicle Gas-Insulated Switchgear (Gas Insulated Switchgear, GIS) ultrasonic Partial Discharge Detecting Technology field, particularly relate to the device for obtaining wideband ultrasonic signal, can obtain GIS apparatus local discharge produce each band limits in ultrasonic signal, thereby the ultrasonic signal wave form distortion of avoiding sensor response frequency narrow range to cause.
Background technology
With sulfur hexafluoride (SF
6) advantage such as for the GIS of insulating medium also claims gas insulated metal enclosed swit chgear compared with conventional electrical appliance, GIS has that floor area is little, compact conformation, Electro Magnetic Compatibility are good, safe and reliable to operation, the application in electric system is more and more extensive.But because its complex structure, workmanship require high; Repair time is long, and power failure range impact is large, and maintenance craft requirement is very meticulous, the careless slightly repair quality problem that just may cause.
Carry out GIS apparatus local discharge and detect for timely grasp device interior defect condition, realize state evaluation and the risk assessment of equipment, the repair based on condition of component of realizing GIS equipment is significant.As a kind of conventional detection method for local discharge, ultrasound wave Partial Discharge Detecting Technology, owing to can avoiding on-the-spot electromagnetic interference (EMI), plays an important role in the Partial Discharge Detection of GIS equipment.But there is technical barrier in existing ultrasound wave Partial Discharge Detecting Technology: first in actual application, the sensor response band scope of ultrasonic partial discharge detecting system cannot cover very wide scope, thereby cause detecting ultrasonic signal wave form distortion, cannot react the ultrasonic signal waveform character of original electric discharge; Second, due to the testing tool lacking for the ultrasonic signal waveform character of original electric discharge, cause can only paying close attention to the strength information of ultrasonic signal in GIS apparatus local discharge detects, and ignored the research and analysis of the waveform character of ultrasonic signal, cause the deviation in detection.
Utility model content
For in the response band scope of carrying out increasing in ultrasound wave Partial Discharge Detection process sensor as far as possible, the ultrasonic signal waveform character of the original electric discharge of real reflection, realize the analysis to device interior state and diagnosis according to waveform character, it is a kind of for obtaining the device of wideband ultrasonic signal that the utility model provides.Concrete Scheme design is as follows:
For obtaining the device of wideband ultrasonic signal, formed by the first sonac 11, the first prime amplifier 12, the second sonac 21, the second prime amplifier 22, resistor 3 and signal output terminal 4;
Wherein, the first sonac 11 and the second sonac 21 are all responsible for ultrasonic signal to be converted to electric signal, wherein, the frequency response range of the first sonac 11 is at 50kHz～200 kHz, and the frequency response range of the second sonac 21 is at 20kHz～180 kHz;
The first prime amplifier 12 and the second prime amplifier 22 are all responsible for the effect that the electric signal receiving is strengthened, and the first prime amplifier 12 and the second prime amplifier 22 are respectively equipped with a signal input part, a signal output part and an earth terminal; Wherein, the signal output part of the first sonac 11 is connected with the signal input part of the first prime amplifier 12, and the signal output part of the second sonac 21 is connected with the signal input part of the second prime amplifier 22;
The two ends of resistor 3 are parallel with signal output terminal 4.
useful technique effect of the present utility model is
Narrow sensor that this product utilization is conventional (frequency response range is respectively at the sonac of 50kHz～200 kHz, 20kHz～180 kHz and 200kHz～1000 kHz) and by the mode of combination, acquisition has the ultrasonic signal sensing device of broadband responding range, the signal waveform distortion of avoiding ultrasonic sensing device to cause, can holding signal waveform character in obtaining ultrasonic signal, carry out GIS device interior condition diagnosing according to ultrasonic signal waveform character and provide the foundation for realizing.
Accompanying drawing explanation
Fig. 1 is circuit structure sketch of the present utility model.
Fig. 2 is the circuit structure sketch of embodiment 2.
Sequence number in upper figure: resistor 3, signal output terminal 4, the first sonac 11, the first prime amplifier 12, the second sonac 21, the second prime amplifier 22, the 3rd sonac 51, the 3rd prime amplifier 52.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the utility model is further described.
embodiment 1
Referring to Fig. 1, for obtaining the device of wideband ultrasonic signal, formed by the first sonac 11, the first prime amplifier 12, the second sonac 21, the second prime amplifier 22, resistor 3 and signal output terminal 4;
Wherein, the first sonac 11 and the second sonac 21 are all responsible for ultrasonic signal to be converted to electric signal, and wherein, the first sonac 11 is the R15D type sonac of physical acoustics company of the U.S., and its frequency response range is at 50kHz～200 kHz; The second sonac 21 is the D9241A type sonac of physical acoustics company of the U.S., and its frequency response range is at 20kHz～180 kHz;
The first prime amplifier 12 and the second prime amplifier 22 are all responsible for the effect that the electric signal receiving is strengthened, and all adopt the ultrasonic prime amplifier of 2/4/6C type Low-Noise Broad-Band of physical acoustics company of the U.S.; The first prime amplifier 12 and the second prime amplifier 22 are respectively equipped with a signal input part, a signal output part and an earth terminal; Wherein, the signal output part of the first sonac 11 is connected with the signal input part of the first prime amplifier 12, and the signal output part of the second sonac 21 is connected with the signal input part of the second prime amplifier 22;
The two ends of resistor 3 are parallel with signal output terminal 4, the connector lug of the BNC specification that signal output terminal 4 is standard.
In addition, the resistance of resistor 3 is not less than 50 Ω.
embodiment 2
Referring to Fig. 2, front with the circuit structure described in embodiment 1, in addition, also be provided with the 3rd sonac 51 and the 3rd prime amplifier 52, wherein, the 3rd sonac 51 is responsible for ultrasonic signal to be converted to electric signal, and the frequency response range of the 3rd sonac 51 is at 200kHz～1000 kHz; In this example, the 3rd sonac 51 is the R80s type sonac that physical acoustics company of the U.S. produces; The 3rd prime amplifier 52 is responsible for the electric signal receiving being superposeed and collecting processing, and the 3rd prime amplifier 52 in this example adopts the ultrasonic prime amplifier of 2/4/6C type Low-Noise Broad-Band of physical acoustics company of the U.S.; The 3rd prime amplifier 52 is provided with a signal input part, a signal output part and an earth terminal; Wherein,
The signal output part of the 3rd sonac 51 is connected with the signal input part of the 3rd prime amplifier 52;
The signal output part of the first prime amplifier 12 is connected with the signal output part of the 3rd prime amplifier 52 with the connected node of the signal output part of the second prime amplifier 22; The earth terminal of the first prime amplifier 12 is connected with the earth terminal of the 3rd prime amplifier 52 with the connected node of the earth terminal of the second prime amplifier 22.
In addition, the first prime amplifier 12, the second prime amplifier 22 and the 3rd sonac 51 both can, directly by wire power taking separately from power supply, also can be crossed together wire power taking from the detecting instrument being connected with signal output terminal 4.
Claims (3)
1. for obtaining the device of wideband ultrasonic signal, it is characterized in that, formed by the first sonac (11), the first prime amplifier (12), the second sonac (21), the second prime amplifier (22), resistor (3) and signal output terminal (4);
Wherein, the first sonac (11) is all responsible for ultrasonic signal to be converted to electric signal with the second sonac (21), wherein, the frequency response range of the first sonac (11) is at 50kHz～200 kHz, and the frequency response range of the second sonac (21) is at 20kHz～180 kHz;
The first prime amplifier (12) is all responsible for the second prime amplifier (22) effect that the electric signal receiving is strengthened, and the first prime amplifier (12) is respectively equipped with a signal input part, a signal output part and an earth terminal with the second prime amplifier (22); Wherein, the signal output part of the first sonac (11) is connected with the signal input part of the first prime amplifier (12), and the signal output part of the second sonac (21) is connected with the signal input part of the second prime amplifier (22);
Resistor (3) is responsible for the electric signal receiving superpose and collect, wherein, the signal output part of the signal output part of the first prime amplifier (12) and the second prime amplifier (22) is connected to one end of resistor (3) jointly, and the earth terminal of the earth terminal of the first prime amplifier (12) and the second prime amplifier (22) is connected to the other end of resistor (3) jointly;
The two ends of resistor (3) are parallel with signal output terminal (4).
2. according to claim 1ly it is characterized in that for obtaining the device of wideband ultrasonic signal, the resistance of resistor (3) is not less than 50 Ω.
3. according to claim 1 for obtaining the device of wideband ultrasonic signal, it is characterized in that, also be provided with the 3rd sonac (51) and the 3rd prime amplifier (52), wherein, the 3rd sonac (51) is responsible for ultrasonic signal to be converted to electric signal, and the frequency response range of the 3rd sonac (51) is at 200kHz～1000 kHz; The 3rd prime amplifier (52) is responsible for the electric signal receiving being superposeed and collecting processing, and the 3rd prime amplifier (52) is provided with a signal input part, a signal output part and an earth terminal; Wherein,
The signal output part of the 3rd sonac (51) is connected with the signal input part of the 3rd prime amplifier (52);
The signal output part of the first prime amplifier (12) is connected with the signal output part of the 3rd prime amplifier (52) with the connected node of the signal output part of the second prime amplifier (22); The earth terminal of the first prime amplifier (12) is connected with the earth terminal of the 3rd prime amplifier (52) with the connected node of the earth terminal of the second prime amplifier (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320662978.5U CN203630275U (en) | 2013-10-26 | 2013-10-26 | Device for acquiring broadband ultrasonic signal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320662978.5U CN203630275U (en) | 2013-10-26 | 2013-10-26 | Device for acquiring broadband ultrasonic signal |
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| Publication Number | Publication Date |
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| CN203630275U true CN203630275U (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320662978.5U Expired - Lifetime CN203630275U (en) | 2013-10-26 | 2013-10-26 | Device for acquiring broadband ultrasonic signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103605050A (en) * | 2013-10-26 | 2014-02-26 | 国家电网公司 | Device for acquiring broadband ultrasonic signal |
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2013
- 2013-10-26 CN CN201320662978.5U patent/CN203630275U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103605050A (en) * | 2013-10-26 | 2014-02-26 | 国家电网公司 | Device for acquiring broadband ultrasonic signal |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140604 |
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| CX01 | Expiry of patent term |