CN202383248U - Partial discharge ultra-high-frequency (UHF) signal processing circuit - Google Patents
Partial discharge ultra-high-frequency (UHF) signal processing circuit Download PDFInfo
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- CN202383248U CN202383248U CN2011205463459U CN201120546345U CN202383248U CN 202383248 U CN202383248 U CN 202383248U CN 2011205463459 U CN2011205463459 U CN 2011205463459U CN 201120546345 U CN201120546345 U CN 201120546345U CN 202383248 U CN202383248 U CN 202383248U
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- uhf
- output buffer
- amplifying circuit
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Abstract
The utility model relates to a partial discharge ultra-high-frequency (UHF) signal processing circuit and belongs to the technical field of detection instruments for power equipment. The utility model adopts the technical scheme that the partial discharge UHF signal processing circuit comprises a high-pass filter (1), a low-pass filter (3), a first-stage amplification circuit (2), a second-stage amplification circuit (4), a detection circuit (5) and an output buffer circuit (6), wherein a UHF signal enters a circuit through a receiving antenna; a required signal is selected by the filters which respectively consist of inductors and capacitors (LC) and then amplified by the first-stage amplification circuit and the second-stage amplification circuit; the detection circuit can detect the envelope of the UHF signal for signal acquisition; the output buffer circuit can improve the output capacity of the circuit; and a power supply circuit respectively supplies power to the first-stage amplification circuit, the second-stage amplification circuit, the detection circuit and the output buffer circuit. The partial discharge UHF signal processing circuit is simple, convenient to debug and low in cost, high sensitivity and stable gain can be realized in a large dynamic range of the UHF signal, the output buffer circuit can improve the output capacity, and the long-distance transmission of the signal is realized.
Description
Technical field
The utility model relates to a kind of local discharge superhigh frequency signal processing circuit, belongs to power equipment detecting instrument technical field.
Background technology
Along with the growth of requirement to electric power, electricity has become various places economic development and the indispensable product of people's lives.For guaranteeing the stability and security of electric power supply, the detection of the especially operating high-tension electricity transmission equipment of power transmitting device local discharge signal has been become the problem of present the supreme arrogance of a person with great power.GIS equipment has been applied in each high voltage substation widely.Owing to lack detection means effectively always, the security of GIS equipment operation becomes a difficult problem always.The ultrasonic method of measuring of background technology owing to need the probe contact good, very easily receives the influence of external environment, and need smear couplant in the testing process, detect that the GIS of a website needs for up to several hours.
The utility model content
The purpose of the utility model provides a kind of local discharge superhigh frequency signal processing circuit, and it is high to detect frequency, can avoid most undesired signal frequencies, realizes very high antijamming capability, realizes charged patrolling and examining, and solves the problems referred to above that background technology exists.
The technical scheme of the utility model is: a kind of local discharge superhigh frequency signal processing circuit; Comprise filtering circuit, amplifying circuit, detecting circuit, output buffer and feed circuit; Filtering circuit connects detecting circuit through amplifying circuit; Detecting circuit connects output buffer, and feed circuit connect filtering circuit, amplifying circuit, detecting circuit, output buffer, and power supply is provided.
Said amplifying circuit is made up of the two-stage amplifying circuit; First order amplifying circuit and the second level amplifying circuit formed respectively by wideband radio frequency amplifier; Filtering circuit comprises Hi-pass filter and low-pass filter, and Hi-pass filter connects first order amplifying circuit, and output connects low-pass filter; Low-pass filter connects second level amplifying circuit, and amplifying circuit output in the second level connects detecting circuit.
Above-mentioned shelf depreciation UHF signal processing circuit; The UHF signal gets into circuit through receiving antenna; Getting into the first order amplifying circuit of being made up of wideband radio frequency amplifier after Hi-pass filter of at first forming via LC and the part below the trapper filtering desired signal frequency band amplifies; The low-pass filter of being made up of LC more afterwards comes the part more than the filtering desired signal frequency band, gets into the second level amplifying circuit of being made up of wideband radio frequency amplifier again; The said detecting circuit of being made up of special-purpose detection chip, mica capacitor and resistance detects the envelope of the UHF signal that amplifies; The envelope of UHF signal is exported with the mode that operational amplifier connects into follower via said output buffer.
The beneficial effect of the utility model is: circuit simply is convenient to debugging; With low cost; And in the very big dynamic range of UHF signal, can realize higher sensitivity and stable gain, output buffer can improve fan-out capability, realizes the long-distance transmissions of signal.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model;
Among the figure: Hi-pass filter 1, first order amplifying circuit 2, low-pass filter 3, second level amplifying circuit 4, detecting circuit 5, output buffer 6;
Accompanying drawing 2 is circuit diagrams of the utility model;
Among the figure: U1, U3 wideband radio frequency amplifier; The special-purpose detection chip of U5; The U6 operational amplifier; U2, U4, U7, U8 linear voltage stabilization chip; L1, L2, L5 air core inductor; L3, L4 radio-frequency choke; The L6 power inductance; R1-R6 resistance; C1-C23 electric capacity; P1, P2 radio frequency connector.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further through embodiment.
A kind of local discharge superhigh frequency signal processing circuit; Comprise filtering circuit, amplifying circuit, detecting circuit 5, output buffer 6 and feed circuit; Filtering circuit connects detecting circuit through amplifying circuit; Detecting circuit connects output buffer, and feed circuit connect filtering circuit, amplifying circuit, detecting circuit, output buffer, and power supply is provided.Said amplifying circuit is made up of the two-stage amplifying circuit; First order amplifying circuit 2 and the second level amplifying circuit 4 formed respectively by wideband radio frequency amplifier; Filtering circuit comprises Hi-pass filter 1 and low-pass filter 3, and Hi-pass filter connects first order amplifying circuit, and output connects low-pass filter; Low-pass filter connects second level amplifying circuit, and amplifying circuit output in the second level connects detecting circuit.
Principle of work: with reference to accompanying drawing 2, the UHF signal gets into circuit via P1, and the Hi-pass filter that C1, L1 formed and input signal is carried out filtering by the trapper that L2, C3 form is below the filtering desired signal frequency band and the interference of mobile phone signal; Get into the first order amplifying circuit of being made up of wideband radio frequency amplifier U1 afterwards, amplifier is to all having fixing gain than the signal in the great dynamic range; First order amplifying circuit output signal is coupled to the low-pass filter of being made up of L5, C9 through C5, and low-pass filter output is connected to the second level amplifying circuit of being made up of wideband radio frequency amplifier U2 equally; U6, R5, C18 constitute detecting circuit, can detect the envelope of input UHF signal, so that gather; Operational amplifier U5 constitutes output buffer; The UHF signal is exported via P2, and supply voltage also is to be input to circuit through P2, and the filter network of being made up of L6, C22, C23 is supplied with four linear voltage stabilization chip U2, U4, U7, U8 after to input voltage filtering; The filter network that the voltage stabilizing output of voltage stabilizing chip U2, U4 is formed via filter capacitor and radio-frequency choke is supplied with first order amplifying circuit and second level amplifying circuit behind the filtering high and low frequency ripple; The voltage stabilizing output of voltage stabilizing chip U7, U8 is via supplying with detecting circuit and output buffer behind the capacitor filtering.
Claims (1)
1. local discharge superhigh frequency signal processing circuit; It is characterized in that: comprise filtering circuit, amplifying circuit, detecting circuit (5), output buffer (6) and feed circuit; Filtering circuit connects detecting circuit through amplifying circuit; Detecting circuit connects output buffer, and feed circuit connect filtering circuit, amplifying circuit, detecting circuit, output buffer; Said amplifying circuit is made up of the two-stage amplifying circuit; First order amplifying circuit (2) and the second level amplifying circuit (4) formed respectively by wideband radio frequency amplifier; Filtering circuit comprises Hi-pass filter (1) and low-pass filter (3), and Hi-pass filter connects first order amplifying circuit, and output connects low-pass filter; Low-pass filter connects second level amplifying circuit, and amplifying circuit output in the second level connects detecting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205463459U CN202383248U (en) | 2011-12-23 | 2011-12-23 | Partial discharge ultra-high-frequency (UHF) signal processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205463459U CN202383248U (en) | 2011-12-23 | 2011-12-23 | Partial discharge ultra-high-frequency (UHF) signal processing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202383248U true CN202383248U (en) | 2012-08-15 |
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ID=46631741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205463459U Expired - Fee Related CN202383248U (en) | 2011-12-23 | 2011-12-23 | Partial discharge ultra-high-frequency (UHF) signal processing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202383248U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777126A (en) * | 2013-11-22 | 2014-05-07 | 国家电网公司 | Transformer partial discharge ultrasonic sensor circuit structure |
| CN104035012A (en) * | 2014-05-15 | 2014-09-10 | 国家电网公司 | Partial-discharge ultrahigh-frequency-signal detection conditioning circuit |
| CN104267326A (en) * | 2014-10-23 | 2015-01-07 | 广州供电局有限公司 | Partial discharge signal detection system |
| WO2015085955A1 (en) * | 2013-12-13 | 2015-06-18 | 上海交通大学 | Parallel connecting method and device for multi-path partial discharge signals |
| CN108169637A (en) * | 2017-12-28 | 2018-06-15 | 重庆臻远电气有限公司 | Envelop detection apparatus based on integrated chip |
-
2011
- 2011-12-23 CN CN2011205463459U patent/CN202383248U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777126A (en) * | 2013-11-22 | 2014-05-07 | 国家电网公司 | Transformer partial discharge ultrasonic sensor circuit structure |
| WO2015085955A1 (en) * | 2013-12-13 | 2015-06-18 | 上海交通大学 | Parallel connecting method and device for multi-path partial discharge signals |
| CN104035012A (en) * | 2014-05-15 | 2014-09-10 | 国家电网公司 | Partial-discharge ultrahigh-frequency-signal detection conditioning circuit |
| CN104035012B (en) * | 2014-05-15 | 2016-08-24 | 国家电网公司 | A kind of modulate circuit of partial-discharge ultrahigh-frequency signal detection |
| CN104267326A (en) * | 2014-10-23 | 2015-01-07 | 广州供电局有限公司 | Partial discharge signal detection system |
| CN108169637A (en) * | 2017-12-28 | 2018-06-15 | 重庆臻远电气有限公司 | Envelop detection apparatus based on integrated chip |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20131223 |