CN103616625A - External sensor system used for detecting partial discharge - Google Patents
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- CN103616625A CN103616625A CN201310362730.1A CN201310362730A CN103616625A CN 103616625 A CN103616625 A CN 103616625A CN 201310362730 A CN201310362730 A CN 201310362730A CN 103616625 A CN103616625 A CN 103616625A
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Abstract
The invention provides an external sensor system used for detecting partial discharge. The system includes a supersonic wave reception probe, a pre-amplification module, a logarithm demodulation module and a power supply module. By adopting an amplifier AD620 with low noise and high gain and a logarithm amplifier AD8310 with a large dynamic scope and comparative high sensitivity, a large dynamic scope and little distortion are achieved, and problems caused by partial discharge are solved, the problems are that attenuation and absorption of a supersonic wave generated by a partial discharge resource occur during propagation to the supersonic wave reception probe, a plurality of losses such as reflection and the like occur at a connection surface between different mediums, and a supersonic wave signal received by the supersonic wave reception probe is very weak. Compared with conventional detection, detection sensitivity of the external sensor system used for detecting partial discharge may reach up to 89 dBm, and the requirement of sensitivity of a sensor used for detecting partial discharge can be fully satisfied.
Description
Technical field
The present invention relates to a kind of outer sensor system for detection of shelf depreciation.
Background technology
The basic demand of the reliability and stability Shi Ge electricity consumption department of electric system to power industry.Shelf depreciation is deteriorated sign and the forms of expression of common insulation of electrical installation such as gas-insulated combined switch equipment GIS and transformer, shelf depreciation can cause again the further deteriorated of insulating property, even finally may cause insulation breakdown, cause serious consequence.Therefore, power equipment is carried out to the Partial Discharge Detection insulation status of discovering device in time, and the insulation hidden danger existing is keeped in repair to investigation timely, can reduce maintenance cost, guarantee the normal operation of power equipment.
The gordian technique of Partial Discharge Detection is the highly sensitive sensor of development, and approach sensor has built-in and outer sensor two classes.It is capable and taper that built-in sensors mainly contains disk.Built-in sensors has higher sensing efficiency, is also conducive to the various interference in the anti-external world simultaneously.But built-in sensors generally can not be tested under the normal operation of electric system, and outer sensor generally can test office be put the in the situation that of Operation of Electric Systems, and can carry out on-line monitoring.Because outer sensor is than built-in sensors complex structure, what in engineering is used, be comparatively satisfied with is also rare.Therefore, develop a kind of detection outer sensor of putting for highly sensitive innings and have important realistic meaning.
The problems referred to above are the problems that should pay attention to and solve in the testing process of shelf depreciation.
Summary of the invention
The object of this invention is to provide the built-in sensors existing in a kind of solution of the outer sensor system for detection of shelf depreciation prior art can not test under the normal operation of electric system, and current outer sensor is than built-in sensors complex structure, the problem of non-ideal use in engineering is used.
Technical solution of the present invention is:
A kind of outer sensor system for detection of shelf depreciation, comprise pre-amplifying module, logarithmic detector module, be used to pre-amplifying module and logarithmic detector module that the power supply module of voltage is provided, described pre-amplifying module comprises amplifier AD620, the pin 1 of described amplifier AD620 connects the pin 8 of amplifier AD620 by regulating resistance Rg, the pin 2 of described amplifier AD620 is connected with ultrasound wave receiving transducer by capacitor C 1, the pin 2 of described amplifier AD620 is by resistance R 1 ground connection, the pin 3 of described amplifier AD620 connects ultrasound wave receiving transducer by capacitor C 2, the pin 3 of described amplifier AD620 is by resistance R 2 ground connection, the pin 4 of described amplifier AD620 is connected with the negative pole of power supply module by inductance L 2, the pin 4 of described amplifier AD620 is by tantalum capacitor C 5 ground connection, the pin 4 of described amplifier AD620 is by capacitor C 5 ground connection, pin 5 ground connection of described amplifier AD620, the pin 6 of described amplifier AD620 connects logarithmic detector module by capacitor C 7, the pin 7 of described amplifier AD620 connects the positive pole of power supply module by inductance L 1, the pin 7 of described amplifier AD620 is by capacitor C 3 ground connection, the pin 7 of described amplifier AD620 is by tantalum capacitor C 4 ground connection.
Preferably, described logarithmic detector module comprises logarithmic amplifier AD8310, the pin 1 of described logarithmic amplifier AD8310 connects the negative pole of power supply module by capacitor C 9, the pin 2 of described logarithmic amplifier AD8310 is by connecting the negative pole of power supply module, the pin 3 of described logarithmic amplifier AD8310 connects the negative pole of power supply module by capacitor C 22, the pin 4 of described logarithmic amplifier AD8310 connects delivery end by resistance R 22, the pin 5 of described logarithmic amplifier AD8310 is successively by resistance R 4, inductance L 3 ground connection, the pin 5 of described logarithmic amplifier AD8310 connects the negative pole of power supply module by capacitor C 24, the pin 5 of described logarithmic amplifier AD8310 is successively by resistance R 4, tantalum capacitor C 20 connects the negative pole of power supply module, described tantalum capacitor C 20 is parallel with capacitor C 21, the pin 6 of described logarithmic amplifier AD8310 connects the negative pole of power supply module by capacitor C 23, the pin 6 of described logarithmic amplifier AD8310 connects the pin 4 of logarithmic amplifier AD8310 by resistance R 21, the pin 7 of described logarithmic amplifier AD8310 connects the negative pole of power supply module by capacitor C 25, the pin 8 of described logarithmic amplifier AD8310 connects pre-amplifying module by capacitor C 8, the pin 1 of described logarithmic amplifier AD8310 connects the pin 8 of logarithmic amplifier AD8310 by inductance L 4, described capacitor C 8 connects capacitor C 9 by resistance R 3.
Preferably, the resistance of described regulating resistance Rg is 205-220 Ω.
Preferably, described ultrasound wave receiving transducer comprises shell, tinsel guard, taper resonating disk, piezoelectric chip and lead terminal, described tinsel guard, taper resonating disk, piezoelectric chip are all located in described shell, described wire gauze covers at the top of shell, described taper resonating disk is located on piezoelectric chip, described piezoelectric chip connecting lead wire terminal.
Preferably, described power supply module comprises power supply chip P1, the first stabilivolt 78L05 and the second stabilivolt 78L05, the pin one of described power supply chip P1 is successively by fuse F1, diode D6 connects the pin 3 of the first stabilivolt 78L05, the pin two of described power supply chip P1 connects the pin 2 of the first stabilivolt 78L05 and the pin 2 of the second stabilivolt 78L05, the pin 2 of described the first stabilivolt 78L05 connects the positive pole of diode D6 by Transient Suppression Diode TVS1, the negative pole of described diode D6 connects the pin 3 of the first stabilivolt 78L05, the pin 2 of described the first stabilivolt 78L05 connects the pin 3 of the first stabilivolt 78L05 by capacitor C 101, described capacitor C 101 is parallel with tantalum capacitor C 102, the pin 1 of described the first stabilivolt 78L05 is connected with the pin 3 of the second stabilivolt 78L05, the pin 1 of described the first stabilivolt 78L05 connects the pin 1 of the second stabilivolt 78L05 by capacitor C 103, described capacitor C 103 is parallel with tantalum capacitor C 104, the pin 2 of described the second stabilivolt 78L05 connects the pin 3 of the second stabilivolt 78L05 by capacitor C 201, described capacitor C 201 is parallel with tantalum capacitor C 202, pin 1 ground connection of described the second stabilivolt 78L05, the pin 1 of described the second stabilivolt 78L05 connects the pin 2 of the second stabilivolt 78L05 by capacitor C 203, described capacitor C 203 is parallel with tantalum capacitor C 204.
Preferably, described pre-amplifying module and logarithmic detector intermodule are connected with for receiving electromagnetic antenna.
A kind of outer sensor system for detection of shelf depreciation of the present invention, comprises ultrasound wave receiving transducer, pre-amplifying module, logarithmic detector module, power supply module, and uses oscillograph etc. as pulse output display.By select noise low, gain amplifier AD620 high and the logarithmic amplifier AD8310 of great dynamic range, higher sensitivity, met the requirement of great dynamic range and little distortion, and while having solved generation shelf depreciation, the process that propagates into ultrasound wave receiving transducer, can there is attenuation and absorption in the ultrasound wave producing from the office source of putting, also can there is the multiple losses such as reflection in the abutted surface in different medium, the problem that the ultrasonic signal that ultrasonic probe receives is extremely faint.Power-supplying circuit needs only as prime amplifier and the wave detector using in sensor circuit provides stable voltage, and will meet the requirement of each chip to supply voltage.
In pre-amplifying module, 3 two input ends of the pin 2 of amplifier AD620 and pin are inputted by the polarity free capacitor AC coupling of 0.1 μ F respectively, the resistance of the 100k of respectively with two one end ground connection of two coupling capacitances forms Hi-pass filter, to reduce the low-frequency disturbance in environment.Pin 7 and the pin 4 of amplifier AD620 are respectively positive and negative power supply side, and power supply voltage range is ± 2.3V ~ ± 18V.The pin 7 of amplifier AD620 and pin 4 all have polarity tantalum electric capacity by what be connected that a paster encapsulates that the ceramic condenser of 0.1 μ F and paster encapsulate 10 μ F, and are connected with power supply by a magnetic bead.The pin 5 of amplifier AD620 is reference pin, in order to guarantee the chip ground connection that can work.
In logarithmic detector module, by the input impedance of resistance R 3, capacitor C 8, capacitor C 9 and logarithmic amplifier AD8310, jointly form input port network.The pin 5 of logarithmic amplifier AD8310 connects power supply side, adopts the electrodeless electric capacity C21 of a 0.1 μ F and utmost point tantalum capacitor C 20 parallel connections that have of 10 μ F to form power filter, and the access of connecting with a magnetic bead and resistance R 4.Pin 2 ground connection of logarithmic amplifier AD8310 are connected log slope regulating resistance R21 between the pin 4 of logarithmic amplifier AD8310 and pin 6 pin.This kind be for detection of the outer sensor system of shelf depreciation, low based on noise, gain amplifier AD620 high and the ultrasonic sensor circuit of the logarithmic detector amplifier AD8310 of great dynamic range, has high sensitivity and can battery-powered feature.Compare with traditional detection, this kind, for detection of the reach-89dBm of detection sensitivity of the outer sensor system of shelf depreciation, can meet the requirement that transducer sensitivity in detection is put in office completely.
This kind is for detection of the outer sensor system of shelf depreciation, and detection is non-intrusion type, and point of discharge is conventionally in the inside of equipment, and sensor is to be generally close to device housings.Ultrasound wave will be propagated through medium from discharge source to sensor, and sound wave is decayed in the air, and frequency is larger, decays more serious.The sensing range of ultrasonic sensor depends on wavelength and the frequency of its use to a great extent.Wavelength is longer, and frequency is less, detects distance larger.Characteristic in conjunction with sound wave, the signal that the ultrasonic probe of selecting centre frequency to be about 40kHz receives is as detection signal, select the ultrasound wave receiving transducer that centre frequency is 40kHz, the resistance of the gain-adjusted resistance R g that the pin 1 of amplifier AD620 is connected with 8 of pins is chosen as 205-220 Ω, be preferably 210, guaranteed that the signal of frequency in 40kHz left and right is exaggerated and can meets the requirement that detection is put in office.
This kind is for detection of the outer sensor system of shelf depreciation, described pre-amplifying module and logarithmic detector intermodule are connected with for receiving electromagnetic antenna, the sound reproduction of the office of extraction simultaneously, electric signal also obtain sound, electric signal mistiming, and positioning error is planar less, for Partial Discharge Detection and location.
The invention has the beneficial effects as follows: a kind of outer sensor system for detection of shelf depreciation of the present invention, detect and be not subject to electrical Interference, there is the advantage that can realize online detection.Because acoustic wave propagation velocity is less, be conducive to obtain the relatively accurate mistiming, be convenient to partial discharge location, also can improve setting accuracy simultaneously.Low based on noise, gain amplifier AD620 high and the ultrasonic sensor circuit of the logarithmic detector amplifier AD8310 of great dynamic range, there is high sensitivity and can battery-powered feature.Compare with traditional detection, this kind, for detection of the reach-89dBm of detection sensitivity of the outer sensor system of shelf depreciation, can meet the requirement that transducer sensitivity in detection is put in office completely.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the structural representation of ultrasound wave receiving transducer in the embodiment of the present invention;
Fig. 3 is the structural representation of power-supplying circuit in the embodiment of the present invention.
Wherein: 1-ultrasound wave receiving transducer, 2-shell, 3-tinsel guard, 4-taper resonating disk, 5-piezoelectric chip, 6-lead terminal.
Embodiment
Below in conjunction with accompanying drawing, describe the preferred embodiments of the present invention in detail.
As shown in Figure 1, the present embodiment provides a kind of outer sensor system for detection of shelf depreciation, comprise pre-amplifying module, logarithmic detector module, be used to pre-amplifying module and logarithmic detector module that the power supply module of voltage is provided, described pre-amplifying module comprises amplifier AD620, the pin 1 of described amplifier AD620 connects the pin 8 of amplifier AD620 by regulating resistance Rg, the pin 2 of described amplifier AD620 is connected with ultrasound wave receiving transducer 1 by capacitor C 1, the pin 2 of described amplifier AD620 is by resistance R 1 ground connection, the pin 3 of described amplifier AD620 connects ultrasound wave receiving transducer 1 by capacitor C 2, the pin 3 of described amplifier AD620 is by resistance R 2 ground connection, the pin 4 of described amplifier AD620 is connected with the negative pole of power supply module by inductance L 2, the pin 4 of described amplifier AD620 is by tantalum capacitor C 5 ground connection, the pin 4 of described amplifier AD620 is by capacitor C 5 ground connection, pin 5 ground connection of described amplifier AD620, the pin 6 of described amplifier AD620 connects logarithmic detector module by capacitor C 7, the pin 7 of described amplifier AD620 connects the positive pole of power supply module by inductance L 1, the pin 7 of described amplifier AD620 is by capacitor C 3 ground connection, the pin 7 of described amplifier AD620 is by tantalum capacitor C 4 ground connection.Described pre-amplifying module and logarithmic detector intermodule are connected with for receiving electromagnetic antenna.The resistance of described regulating resistance Rg is 205-220 Ω.
Described logarithmic detector module comprises logarithmic amplifier AD8310, the pin 1 of described logarithmic amplifier AD8310 connects the negative pole of power supply module by capacitor C 9, the pin 2 of described logarithmic amplifier AD8310 is by connecting the negative pole of power supply module, the pin 3 of described logarithmic amplifier AD8310 connects the negative pole of power supply module by capacitor C 22, the pin 4 of described logarithmic amplifier AD8310 connects delivery end by resistance R 22, the pin 5 of described logarithmic amplifier AD8310 is successively by resistance R 4, inductance L 3 ground connection, the pin 5 of described logarithmic amplifier AD8310 connects the negative pole of power supply module by capacitor C 24, the pin 5 of described logarithmic amplifier AD8310 is successively by resistance R 4, tantalum capacitor C 20 connects the negative pole of power supply module, described tantalum capacitor C 20 is parallel with capacitor C 21, the pin 6 of described logarithmic amplifier AD8310 connects the negative pole of power supply module by capacitor C 23, the pin 6 of described logarithmic amplifier AD8310 connects the pin 4 of logarithmic amplifier AD8310 by resistance R 21, the pin 7 of described logarithmic amplifier AD8310 connects the negative pole of power supply module by capacitor C 25, the pin 8 of described logarithmic amplifier AD8310 connects pre-amplifying module by capacitor C 8, the pin 1 of described logarithmic amplifier AD8310 connects the pin 8 of logarithmic amplifier AD8310 by inductance L 4, described capacitor C 8 connects capacitor C 9 by resistance R 3.
As shown in Figure 2, described ultrasound wave receiving transducer 1 comprises shell 2, tinsel guard 3, taper resonating disk 4, piezoelectric chip 5 and lead terminal 6, described tinsel guard 3, taper resonating disk 4, piezoelectric chip 5 are all located in described shell 2, described tinsel guard 3 is located at the top of shell 2, described taper resonating disk 4 is located on piezoelectric chip 5, described piezoelectric chip 5 connecting lead wire terminals 6.As shown in Figure 3, described power supply module comprises power supply chip P1, the first stabilivolt 78L05 and the second stabilivolt 78L05, the pin one of described power supply chip P1 is successively by fuse F1, diode D6 connects the pin 3 of the first stabilivolt 78L05, the pin two of described power supply chip P1 connects the pin 2 of the first stabilivolt 78L05 and the pin 2 of the second stabilivolt 78L05, the pin 2 of described the first stabilivolt 78L05 connects the positive pole of diode D6 by Transient Suppression Diode TVS1, the negative pole of described diode D6 connects the pin 3 of the first stabilivolt 78L05, the pin 2 of described the first stabilivolt 78L05 connects the pin 3 of the first stabilivolt 78L05 by capacitor C 101, described capacitor C 101 is parallel with tantalum capacitor C 102, the pin 1 of described the first stabilivolt 78L05 is connected with the pin 3 of the second stabilivolt 78L05, the pin 1 of described the first stabilivolt 78L05 connects the pin 1 of the second stabilivolt 78L05 by capacitor C 103, described capacitor C 103 is parallel with tantalum capacitor C 104, the pin 2 of described the second stabilivolt 78L05 connects the pin 3 of the second stabilivolt 78L05 by capacitor C 201, described capacitor C 201 is parallel with tantalum capacitor C 202, pin 1 ground connection of described the second stabilivolt 78L05, the pin 1 of described the second stabilivolt 78L05 connects the pin 2 of the second stabilivolt 78L05 by capacitor C 203, described capacitor C 203 is parallel with tantalum capacitor C 204.
A kind of outer sensor system for detection of shelf depreciation of the present embodiment, comprises ultrasound wave receiving transducer 1, pre-amplifying module, logarithmic detector module, power supply module, and uses oscillograph etc. as pulse output display.By select noise low, gain amplifier AD620 high and the logarithmic amplifier AD8310 of great dynamic range, higher sensitivity, met the requirement of great dynamic range and little distortion, and while having solved generation shelf depreciation, the process that propagates into ultrasound wave receiving transducer 1, can there is attenuation and absorption in the ultrasound wave producing from the office source of putting, also can there is the multiple losses such as reflection in the abutted surface in different medium, the problem that the ultrasonic signal that ultrasonic probe receives is extremely faint.Power-supplying circuit needs only as prime amplifier and the wave detector using in sensor circuit provides stable voltage, and will meet the requirement of each chip to supply voltage.
In pre-amplifying module, 3 two input ends of the pin 2 of amplifier AD620 and pin are inputted by the polarity free capacitor AC coupling of 0.1 μ F respectively, the resistance of the 100k of respectively with two one end ground connection of two coupling capacitances forms Hi-pass filter, to reduce the low-frequency disturbance in environment.Pin 7 and the pin 4 of amplifier AD620 are respectively positive and negative power supply side, and power supply voltage range is ± 2.3V ~ ± 18V.The pin 7 of amplifier AD620 and pin 4 all have polarity tantalum electric capacity by what be connected that a paster encapsulates that the ceramic condenser of 0.1 μ F and paster encapsulate 10 μ F, and are connected with power supply by a magnetic bead.The pin 5 of amplifier AD620 is reference pin, in order to guarantee the chip ground connection that can work.
In logarithmic detector module, by the input impedance of resistance R 3, capacitor C 8, capacitor C 9 and logarithmic amplifier AD8310, jointly form input port network.The pin 5 of logarithmic amplifier AD8310 connects power supply side, adopts the electrodeless electric capacity C21 of a 0.1 μ F and utmost point tantalum capacitor C 20 parallel connections that have of 10 μ F to form power filter, and the access of connecting with a magnetic bead and resistance R 4.Pin 2 ground connection of logarithmic amplifier AD8310 are connected log slope regulating resistance R21 between the pin 4 of logarithmic amplifier AD8310 and pin 6 pin.This kind be for detection of the outer sensor system of shelf depreciation, low based on noise, gain amplifier AD620 high and the ultrasonic sensor circuit of the logarithmic detector amplifier AD8310 of great dynamic range, has high sensitivity and can battery-powered feature.Compare with traditional detection, this kind, for detection of the reach-89dBm of detection sensitivity of the outer sensor system of shelf depreciation, can meet the requirement that transducer sensitivity in detection is put in office completely.
This kind is for detection of the outer sensor system of shelf depreciation, and detection is non-intrusion type, and point of discharge is conventionally in the inside of equipment, and sensor is to be generally close to device housings 2.Ultrasound wave will be propagated through medium from discharge source to sensor, and sound wave is decayed in the air, and frequency is larger, decays more serious.The sensing range of ultrasonic sensor depends on wavelength and the frequency of its use to a great extent.Wavelength is longer, and frequency is less, detects distance larger.Characteristic in conjunction with sound wave, the signal that the ultrasonic probe of selecting centre frequency to be about 40kHz receives is as detection signal, select the ultrasound wave receiving transducer 1 that centre frequency is 40kHz, the resistance of the gain-adjusted resistance R g that the pin 1 of amplifier AD620 is connected with 8 of pins is chosen as 205-220 Ω, be preferably 210, guaranteed that the signal of frequency in 40kHz left and right is exaggerated and can meets the requirement that detection is put in office.
This kind is for detection of the outer sensor system of shelf depreciation, described pre-amplifying module and logarithmic detector intermodule are connected with for receiving electromagnetic antenna, the sound reproduction of the office of extraction simultaneously, electric signal also obtain sound, electric signal mistiming, and positioning error is planar less, for Partial Discharge Detection and location.
The beneficial effect of the present embodiment is: a kind of outer sensor system for detection of shelf depreciation of the present embodiment, and detect and be not subject to electrical Interference, there is the advantage that can realize online detection.Because acoustic wave propagation velocity is less, be conducive to obtain the relatively accurate mistiming, be convenient to partial discharge location, also can improve setting accuracy simultaneously.Low based on noise, gain amplifier AD620 high and the ultrasonic sensor circuit of the logarithmic detector amplifier AD8310 of great dynamic range, there is high sensitivity and can battery-powered feature.Compare with traditional detection, this kind, for detection of the reach-89dBm of detection sensitivity of the outer sensor system of shelf depreciation, can meet the requirement that transducer sensitivity in detection is put in office completely.
Claims (6)
1. for detection of an outer sensor system for shelf depreciation, it is characterized in that: comprise pre-amplifying module, logarithmic detector module, be used to pre-amplifying module and logarithmic detector module that the power supply module of voltage is provided,
Described pre-amplifying module comprises amplifier AD620, the pin 1 of described amplifier AD620 connects the pin 8 of amplifier AD620 by regulating resistance Rg, the pin 2 of described amplifier AD620 is connected with ultrasound wave receiving transducer (1) by capacitor C 1, the pin 2 of described amplifier AD620 is by resistance R 1 ground connection, the pin 3 of described amplifier AD620 connects ultrasound wave receiving transducer (1) by capacitor C 2, the pin 3 of described amplifier AD620 is by resistance R 2 ground connection, the pin 4 of described amplifier AD620 is connected with the negative pole of power supply module by inductance L 2, the pin 4 of described amplifier AD620 is by tantalum capacitor C 5 ground connection, the pin 4 of described amplifier AD620 is by capacitor C 5 ground connection, pin 5 ground connection of described amplifier AD620, the pin 6 of described amplifier AD620 connects logarithmic detector module by capacitor C 7, the pin 7 of described amplifier AD620 connects the positive pole of power supply module by inductance L 1, the pin 7 of described amplifier AD620 is by capacitor C 3 ground connection, the pin 7 of described amplifier AD620 is by tantalum capacitor C 4 ground connection.
2. the outer sensor system for detection of shelf depreciation as claimed in claim 1, it is characterized in that: described logarithmic detector module comprises logarithmic amplifier AD8310, the pin 1 of described logarithmic amplifier AD8310 connects the negative pole of power supply module by capacitor C 9, the pin 2 of described logarithmic amplifier AD8310 is by connecting the negative pole of power supply module, the pin 3 of described logarithmic amplifier AD8310 connects the negative pole of power supply module by capacitor C 22, the pin 4 of described logarithmic amplifier AD8310 connects delivery end by resistance R 22, the pin 5 of described logarithmic amplifier AD8310 is successively by resistance R 4, inductance L 3 ground connection, the pin 5 of described logarithmic amplifier AD8310 connects the negative pole of power supply module by capacitor C 24, the pin 5 of described logarithmic amplifier AD8310 is successively by resistance R 4, tantalum capacitor C 20 connects the negative pole of power supply module, described tantalum capacitor C 20 is parallel with capacitor C 21, the pin 6 of described logarithmic amplifier AD8310 connects the negative pole of power supply module by capacitor C 23, the pin 6 of described logarithmic amplifier AD8310 connects the pin 4 of logarithmic amplifier AD8310 by resistance R 21, the pin 7 of described logarithmic amplifier AD8310 connects the negative pole of power supply module by capacitor C 25, the pin 8 of described logarithmic amplifier AD8310 connects pre-amplifying module by capacitor C 8, the pin 1 of described logarithmic amplifier AD8310 connects the pin 8 of logarithmic amplifier AD8310 by inductance L 4, described capacitor C 8 connects capacitor C 9 by resistance R 3.
3. the outer sensor system for detection of shelf depreciation as claimed in claim 1, is characterized in that: the resistance of described regulating resistance Rg is 205-220 Ω.
4. the outer sensor system for detection of shelf depreciation as described in claim 1-3 any one, it is characterized in that: described ultrasound wave receiving transducer (1) comprises shell (2), tinsel guard (3), taper resonating disk (4), piezoelectric chip (5) and lead terminal (6), described tinsel guard (3), taper resonating disk (4), piezoelectric chip (5) is all located in described shell (2), described tinsel guard (3) is located at the top of shell (2), described taper resonating disk (4) is located on piezoelectric chip (5), described piezoelectric chip (5) connecting lead wire terminal (6).
5. the outer sensor system for detection of shelf depreciation as described in claim 1-3 any one, it is characterized in that: described power supply module comprises power supply chip P1, the first stabilivolt 78L05 and the second stabilivolt 78L05, the pin one of described power supply chip P1 is successively by fuse F1, diode D6 connects the pin 3 of the first stabilivolt 78L05, the pin two of described power supply chip P1 connects the pin 2 of the first stabilivolt 78L05 and the pin 2 of the second stabilivolt 78L05, the pin 2 of described the first stabilivolt 78L05 connects the positive pole of diode D6 by Transient Suppression Diode TVS1, the negative pole of described diode D6 connects the pin 3 of the first stabilivolt 78L05, the pin 2 of described the first stabilivolt 78L05 connects the pin 3 of the first stabilivolt 78L05 by capacitor C 101, described capacitor C 101 is parallel with tantalum capacitor C 102, the pin 1 of described the first stabilivolt 78L05 is connected with the pin 3 of the second stabilivolt 78L05, the pin 1 of described the first stabilivolt 78L05 connects the pin 1 of the second stabilivolt 78L05 by capacitor C 103, described capacitor C 103 is parallel with tantalum capacitor C 104, the pin 2 of described the second stabilivolt 78L05 connects the pin 3 of the second stabilivolt 78L05 by capacitor C 201, described capacitor C 201 is parallel with tantalum capacitor C 202, pin 1 ground connection of described the second stabilivolt 78L05, the pin 1 of described the second stabilivolt 78L05 connects the pin 2 of the second stabilivolt 78L05 by capacitor C 203, described capacitor C 203 is parallel with tantalum capacitor C 204.
6. the outer sensor system for detection of shelf depreciation as described in claim 1-3 any one, is characterized in that: described pre-amplifying module and logarithmic detector intermodule are connected with for receiving electromagnetic antenna.
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| CN110687410A (en) * | 2019-10-15 | 2020-01-14 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Ultrasonic partial discharge test wireless transmission module |
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| CN104569760A (en) * | 2014-12-31 | 2015-04-29 | 刘大永 | Local discharge ultrasonic detection device for small-sized high-voltage element |
| CN104569760B (en) * | 2014-12-31 | 2017-06-16 | 刘大永 | A kind of ultrasonic detection device for partial discharge for small size high voltage devices |
| CN105717425A (en) * | 2016-02-01 | 2016-06-29 | 国家电网公司 | Supersonic online detection system of 1000kV GIS |
| CN106093730B (en) * | 2016-07-27 | 2019-04-26 | 杭州柯林电气股份有限公司 | Intelligent type local-discharge ultrasonic wave sensor and its working method |
| CN106093730A (en) * | 2016-07-27 | 2016-11-09 | 杭州柯林电气股份有限公司 | Intelligence type local-discharge ultrasonic wave sensor and method of work thereof |
| CN106556770A (en) * | 2016-11-24 | 2017-04-05 | 国网河南省电力公司周口供电公司 | A kind of self-priming leakage monitoring device and monitoring method |
| CN108051701A (en) * | 2017-11-17 | 2018-05-18 | 国网青海省电力公司 | A kind of electrical network flashing electric discharge inspection device |
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| CN109143002A (en) * | 2018-10-26 | 2019-01-04 | 重庆大学 | Capacitive pick-up optimum design method built in a kind of cable connector shelf depreciation |
| CN109459673A (en) * | 2018-12-28 | 2019-03-12 | 广州供电局有限公司 | Detection circuit for partial discharge |
| CN110412429A (en) * | 2019-06-03 | 2019-11-05 | 国网宁夏电力有限公司银川供电公司 | A kind of ultrasonic local discharge detection device of GIS device electrification |
| CN110687410A (en) * | 2019-10-15 | 2020-01-14 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Ultrasonic partial discharge test wireless transmission module |
| CN113391166A (en) * | 2021-06-18 | 2021-09-14 | 国网吉林省电力有限公司吉林供电公司 | Portable overhead distribution line fault detection device based on ultrasonic intelligent detection |
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