CN113325076A - Insulator ultrasonic testing auxiliary device - Google Patents

Insulator ultrasonic testing auxiliary device Download PDF

Info

Publication number
CN113325076A
CN113325076A CN202110612360.7A CN202110612360A CN113325076A CN 113325076 A CN113325076 A CN 113325076A CN 202110612360 A CN202110612360 A CN 202110612360A CN 113325076 A CN113325076 A CN 113325076A
Authority
CN
China
Prior art keywords
detection
detection scanning
frame
insulator
encoder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110612360.7A
Other languages
Chinese (zh)
Other versions
CN113325076B (en
Inventor
张兴森
边美华
李君华
卢展强
彭家宁
杨艺云
刘桂婵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electric Power Research Institute of Guangxi Power Grid Co Ltd
Original Assignee
Electric Power Research Institute of Guangxi Power Grid Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electric Power Research Institute of Guangxi Power Grid Co Ltd filed Critical Electric Power Research Institute of Guangxi Power Grid Co Ltd
Priority to CN202110612360.7A priority Critical patent/CN113325076B/en
Publication of CN113325076A publication Critical patent/CN113325076A/en
Application granted granted Critical
Publication of CN113325076B publication Critical patent/CN113325076B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/225—Supports, positioning or alignment in moving situation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
    • G01N29/275—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving both the sensor and the material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/023—Solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/0289—Internal structure, e.g. defects, grain size, texture
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/269—Various geometry objects
    • G01N2291/2697—Wafer or (micro)electronic parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Acoustics & Sound (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The insulator ultrasonic detection auxiliary device comprises two detection scanning frames and a locking assembly; the locking assembly fixes the two detection scanning frames; one detection scanning frame is provided with an encoder component, and the other detection scanning frame is provided with a probe component; one of the detection scanning frames is provided with a mandril component. An elastic telescopic structure is formed at the frame of the detection scanning frame; the bottom of the elastic telescopic structure is provided with a boss, the center of the boss is provided with a through hole to the outside of the detection scanning frame, the upper end of the boss is provided with a plurality of struts, the struts are sleeved with compression springs, and the top ends of the struts are fixed with baffle plates. The detection device can realize phased array detection of the insulator, and the probe assembly, the encoder assembly and the ejector rod assembly can be telescopically adjusted to fix the relative position of the insulator. The probe is arranged on the wedge block, the collimation of the probe is guaranteed, the device keeps good coupling, the scanning position meets the related precision requirement, and the device can continuously scan and control repeated coverage.

Description

Insulator ultrasonic testing auxiliary device
Technical Field
The invention relates to the technical field of ultrasonic nondestructive testing, in particular to an auxiliary device for ultrasonic testing of an insulator.
Background
The insulator is a special insulating control and can play an important role in an overhead transmission line. Early-year insulators are mostly used for telegraph poles, and a plurality of disc-shaped insulators are hung at one end of a high-voltage wire connecting tower which is gradually developed, so that the creepage distance is increased. Insulators serve two basic functions in overhead transmission lines, namely supporting the conductors and preventing current from flowing back to ground. It should not fail due to the various electromechanical stresses caused by changes in environmental and electrical loading conditions, otherwise the insulator would not be as important and would compromise the service and operating life of the entire line.
Insulators are widely used in high-voltage transmission lines. However, with the influence of natural environment and the increase of operation life, various defects such as debonding of the sheath and the core rod and brittle fracture of the core rod occur to the insulator, and great potential safety hazard is brought to the operation of a power grid.
Disclosure of Invention
Aiming at various defects in the insulator, the invention provides a set of special ultrasonic detection auxiliary device for detecting the defects of the insulator, which can be used for quick, effective, simple and convenient operation and reliable data nondestructive detection in a field and a production plant, thereby maintaining the normal operation of a power grid.
The invention adopts the following technical scheme:
the insulator ultrasonic detection auxiliary device comprises two detection scanning frames and a locking assembly; the locking assembly fixes the two detection scanning frames; one of the detection scanning frames is provided with an encoder component, and the other detection scanning frame is provided with a probe component; one of the detection scanning frames is provided with a mandril component.
Preferably, an elastic telescopic structure is formed at the frame of the detection scanning frame; the elastic telescopic structure is characterized in that a boss is arranged at the bottom of the elastic telescopic structure, a through hole is formed in the center of the boss to the outer side of the detection scanning frame, a plurality of supporting columns are arranged at the upper end of the boss, springs are sleeved on the supporting columns, and a baffle is fixed at the top ends of the supporting columns.
Preferably, the wedge block is arranged above a baffle plate of the spring telescopic structure; the upper part of the wedge block is provided with a groove, and the center of the wedge block is provided with a through hole.
Preferably, the encoder assembly comprises an encoder, wherein a vertical frame is installed on a baffle plate of the spring telescopic structure, and the encoder is fixed by the vertical frame.
Preferably, the detection scanning frame is provided with a push rod assembly, the push rod assembly comprises a handle and a telescopic rod, the handle is arranged on the outer side of the detection scanning frame, and the telescopic rod is connected with the handle and arranged on the inner side of the detection scanning frame.
Preferably, the locking assembly comprises a rotating shaft, a rotating block and a bolt, the rotating block is provided with a round hole, the rotating block is fixed at one end of one detection scanning frame, one end of the other detection scanning frame is provided with a mounting hole, and the bolt penetrates through the round hole and is connected with the two detection scanning frames; the rotating shaft is fixed at the other end of the two detection scanning frames.
Preferably, the detection scanning frame is in a semi-circular arc shape.
Compared with the prior art, the beneficial effect of this disclosure is:
the ultrasonic detection auxiliary device for the insulator solves the problem that various defects in the insulator cannot be accurately detected. The detection device can realize phased array detection of the insulator, and the probe assembly, the encoder assembly and the ejector rod assembly can be telescopically adjusted to fix the relative position of the insulator. The probe is arranged on the wedge block, the collimation of the probe is guaranteed, the device keeps good coupling, the scanning position meets the related precision requirement, and the device can continuously scan and control repeated coverage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an ultrasonic insulator detection auxiliary device according to the present invention;
FIG. 2 is a schematic structural diagram of the ultrasonic testing auxiliary device for insulators of the present invention with an object to be tested;
FIG. 3 is a schematic structural diagram of an ultrasonic testing auxiliary device for insulators according to the present invention;
fig. 4 is another schematic structural diagram of the ultrasonic insulator detection auxiliary device of the invention.
Shown in the figure: 1-detection scanning frame, 11-boss, 12-pillar and spring, 13-baffle, 2-locking component, 21-rotating shaft, 22-rotating block, 23-bolt, 3-probe component, 31-wedge block, 4-encoder component, 41-vertical frame, 42-encoder, 5-ejector rod component, 51-handle, 52-telescopic rod and 6-insulator.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
As shown in fig. 1 and 3, the ultrasonic insulator detection auxiliary device comprises two detection scanning frames 1 and a locking assembly 2; the detection scanning frame 1 is in a semi-arc shape, and the locking assembly 2 fixes the two detection scanning frames 1; one detection scanning frame 1 is provided with an encoder component 4 and a mandril component 5, and the other detection scanning frame 1 is provided with a probe component 3.
An elastic telescopic structure is formed at the frame of the detection scanning frame 1; the elastic telescopic structure bottom is a boss 11, and a through-hole is seted up to the frame outside that detects scanning frame 1 at boss 11 center, and the boss upper end is equipped with four pillars, and every pillar has cup jointed spring 12, and the pillar top is fixed with baffle 13.
The probe assembly 3 comprises a wedge 31 which is arranged on a baffle plate of a spring telescopic structure; the upper part of the wedge block is provided with a groove which is arc-shaped and is convenient for being arranged in an ultrasonic detection instrument. A through hole is arranged in the center of the wedge block, and the probe of the ultrasonic detection instrument penetrates through the through hole and is fixed on the wedge block 31. The wedge 31 can be replaced, and the material, size, shape and the like of the wedge 31 are selected according to ultrasonic probes with different sizes and shapes and coupling agents with different materials, so that the detection accuracy is improved.
The encoder assembly 4 comprises an encoder 42, a vertical frame 41 is installed on a baffle plate of a spring telescopic structure, and the encoder 42 is fixed by the vertical frame 41. The encoder 42 is a rotary transducer that converts the rotational displacement into a series of digital pulse signals. The connecting line of the encoder 42 passes through the through hole of the detection scanning frame 1 and is connected with the driving device.
The frame of the detection scanning frame 1 is provided with a mandril assembly 5, the mandril assembly comprises a handle 51 and a telescopic rod 52, the handle 51 is arranged outside the frame of the detection scanning frame 1, and the telescopic rod 52 is connected with the handle 51 and arranged inside the detection scanning frame 1. A spring structure is arranged between the handle 51 and the telescopic rod 52.
The locking assembly 2 comprises a rotating shaft 21, a rotating block 22 and a bolt 23, the rotating block 22 is provided with a round hole, the rotating block 22 is fixed at one end of one detection scanning frame 1, one end of the other detection scanning frame 1 is provided with a mounting hole, and the bolt passes through the round hole 23 and is connected with the two detection scanning frames 1; the rotating shaft 21 is fixed at the other ends of the two detection scanning frames 1, and the rotating shaft 21 rotates to drive the detection scanning frames 1 to rotate, so that the two detection scanning frames 1 are pushed to be closed or opened.
Insulator 6 is cylindric structure, and ejector pin subassembly 5, encoder subassembly 4 and probe subassembly 3 all have a spring structure, and when no insulator, the spring static state relaxes, and ejector pin subassembly 5, encoder subassembly 4 and 3 three length of probe subassembly are the same, and the directional centre of a circle that detects scanning frame 1 that detects. As shown in fig. 2 or 4, the object to be measured is placed, the spring is compressed, and the rod assembly, the encoder assembly and the probe assembly apply force to press on the object to be measured and are coupled with the object to be measured. The maximum spring compression stroke is the largest diameter dimension of the insulator 6 that can be measured. During detection, the workpiece is fixed at three points through the rod assembly 5, the encoder assembly 4 and the probe assembly 3, and the workpiece is manually rotated, so that the detection and the recording of the workpiece in the circumferential direction are realized. The probe sends out ultrasonic waves to the interior of the insulator 6, nondestructive testing is carried out on the insulator 6, detection data are transmitted to the ultrasonic detection system, the driving device drives the encoder 42 to rotate, and power information and position information are fed back to the ultrasonic detection system. The detection comprises the defect position, the defect equivalent size and the like based on the ultrasonic phased array detection technology. The recording includes generating an atlas during the scanning.
The ultrasonic detection auxiliary device for the insulator solves the problem that various defects in the insulator cannot be accurately detected. The detection device can realize phased array detection of the insulator, and the probe assembly, the encoder assembly and the ejector rod assembly can be telescopically adjusted to fix the relative position of the insulator. The probe is arranged on the wedge block, the collimation of the probe is guaranteed, the device keeps good coupling, the scanning position meets the related precision requirement, and the device can continuously scan and control repeated coverage.
In the description of the present invention, it is to be understood that the terms "intermediate", "length", "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", and the like, indicate orientations and positional relationships that are based on the orientations and positional relationships shown in the drawings, are used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the first feature may be "on" the second feature in direct contact with the second feature, or the first and second features may be in indirect contact via an intermediate. "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above description is for the purpose of illustrating embodiments of the invention and is not intended to limit the invention, and it will be apparent to those skilled in the art that any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the invention shall fall within the protection scope of the invention.

Claims (7)

1. The ultrasonic insulator detection auxiliary device is characterized by comprising two detection scanning frames and a locking assembly; the locking assembly fixes the two detection scanning frames;
one of the detection scanning frames is provided with an encoder component, and the other detection scanning frame is provided with a probe component; one of the detection scanning frames is provided with a mandril component.
2. The ultrasonic insulator detection auxiliary device according to claim 1, wherein an elastic telescopic structure is formed at the frame of the detection scanning frame; the elastic telescopic structure is characterized in that a boss is arranged at the bottom of the elastic telescopic structure, a through hole is formed in the center of the boss to the outer side of the detection scanning frame, a plurality of supporting columns are arranged at the upper end of the boss, springs are sleeved on the supporting columns, and a baffle is fixed at the top ends of the supporting columns.
3. The ultrasonic insulator inspection aid of claim 2, wherein the probe assembly includes a wedge mounted over a stop plate of the spring extension; the upper part of the wedge block is provided with a groove, and the center of the wedge block is provided with a through hole.
4. The ultrasonic insulator testing aid of claim 2, wherein the encoder assembly comprises an encoder, a vertical frame is mounted on the baffle of the spring telescopic structure, and the encoder is fixed by the vertical frame.
5. The ultrasonic insulator detection auxiliary device according to claim 1, wherein a push rod assembly is arranged at the frame of the detection scanning frame, the push rod assembly comprises a handle and a telescopic rod, the handle is arranged outside the frame of the detection scanning frame, and the telescopic rod is connected with the handle and arranged inside the detection scanning frame.
6. The ultrasonic insulator detection auxiliary device according to claim 1, wherein the locking assembly comprises a rotating shaft, a rotating block and a bolt, the rotating block is provided with a round hole and fixed at one end of one detection scanning frame, one end of the other detection scanning frame is provided with a mounting hole, and the bolt penetrates through the round hole and is connected with the two detection scanning frames; the rotating shaft is fixed at the other end of the two detection scanning frames.
7. The ultrasonic insulator testing aid of any one of claims 1-6, wherein the testing scanning frame is semi-circular in shape.
CN202110612360.7A 2021-06-02 2021-06-02 Insulator ultrasonic detection auxiliary device Active CN113325076B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110612360.7A CN113325076B (en) 2021-06-02 2021-06-02 Insulator ultrasonic detection auxiliary device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110612360.7A CN113325076B (en) 2021-06-02 2021-06-02 Insulator ultrasonic detection auxiliary device

Publications (2)

Publication Number Publication Date
CN113325076A true CN113325076A (en) 2021-08-31
CN113325076B CN113325076B (en) 2023-06-13

Family

ID=77423186

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110612360.7A Active CN113325076B (en) 2021-06-02 2021-06-02 Insulator ultrasonic detection auxiliary device

Country Status (1)

Country Link
CN (1) CN113325076B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114137076A (en) * 2021-11-29 2022-03-04 芦溪县鸿泰工业瓷厂 Transmission line insulator device of detecting a flaw
CN117388366A (en) * 2023-12-11 2024-01-12 国网浙江省电力有限公司宁波供电公司 Laser positioning device for power transmission line detection

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102128605A (en) * 2010-01-15 2011-07-20 华北电力科学研究院有限责任公司 Insulator scanning device and system
CN102507750A (en) * 2011-11-02 2012-06-20 中国农业大学 Ultrasonic flaw detection scanning frame of porcelain post insulator
CN103616437A (en) * 2013-11-25 2014-03-05 广东汕头超声电子股份有限公司 Ultrasonic testing device for composite insulator
US20140283612A1 (en) * 2013-03-22 2014-09-25 Siemens Energy, Inc. Phased array ultrasonic bolt inspection apparatus and method
CN211179649U (en) * 2019-10-15 2020-08-04 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 Ultrasonic scanning device for tension clamp of high-voltage overhead transmission line conductor
CN111650276A (en) * 2020-05-26 2020-09-11 华北电力科学研究院有限责任公司 Automatic scanning device with guide rail, phased array ultrasonic detection method and system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102128605A (en) * 2010-01-15 2011-07-20 华北电力科学研究院有限责任公司 Insulator scanning device and system
CN102507750A (en) * 2011-11-02 2012-06-20 中国农业大学 Ultrasonic flaw detection scanning frame of porcelain post insulator
US20140283612A1 (en) * 2013-03-22 2014-09-25 Siemens Energy, Inc. Phased array ultrasonic bolt inspection apparatus and method
CN103616437A (en) * 2013-11-25 2014-03-05 广东汕头超声电子股份有限公司 Ultrasonic testing device for composite insulator
CN211179649U (en) * 2019-10-15 2020-08-04 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 Ultrasonic scanning device for tension clamp of high-voltage overhead transmission line conductor
CN111650276A (en) * 2020-05-26 2020-09-11 华北电力科学研究院有限责任公司 Automatic scanning device with guide rail, phased array ultrasonic detection method and system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114137076A (en) * 2021-11-29 2022-03-04 芦溪县鸿泰工业瓷厂 Transmission line insulator device of detecting a flaw
CN117388366A (en) * 2023-12-11 2024-01-12 国网浙江省电力有限公司宁波供电公司 Laser positioning device for power transmission line detection
CN117388366B (en) * 2023-12-11 2024-04-09 国网浙江省电力有限公司宁波供电公司 Laser positioning device for power transmission line detection

Also Published As

Publication number Publication date
CN113325076B (en) 2023-06-13

Similar Documents

Publication Publication Date Title
CN113325076A (en) Insulator ultrasonic testing auxiliary device
CN105717193B (en) A kind of ultrasonic detection method for bolt
CN108562646A (en) GIS cable terminations epoxy bushing ultrasonic phase array detection device and detection method
CN109324305B (en) Capacitive voltage divider for linearity calibration of impulse voltage divider
CN108663019B (en) Electric power tower installation calibrator
CN204214814U (en) A kind of ultrasonic detection device for bolt
CN114136806A (en) Tower pile foundation external application grounding body bending resistance measuring device and using method thereof
CN204789732U (en) Insulator detection device for high voltage transmission lines
CN111075434A (en) Portable sound source device for acoustic logging instrument array receiving sound system field detection and using method thereof
EP4112928A1 (en) Lightning protection system evaluation based on impedance analysis
CN116299122A (en) Position adjusting device and method for ultrahigh frequency sensor
CN216956232U (en) Partial discharge live-line detection sensor placement tool with long-term stability function
CN109060119B (en) Multichannel vibration sensor and strain sensor calibrating device
US20220187355A1 (en) Polygonal spherical space sampling device
CN116298736B (en) Fault detection device for power device
CN208206000U (en) A kind of grounding-for-lightning device is from windup-degree measuring instrument
CN113188590A (en) Dam stability monitoring equipment for hydraulic and hydroelectric engineering
CN108627786B (en) Electric field measuring instrument calibrating device
CN202814929U (en) Tank body health monitoring device of gas insulated switchgear (GIS)
CN220913184U (en) Partial discharge live detection auxiliary mechanical arm and partial discharge live detection device
CN205374526U (en) A sensor supporting mechanism for electrified detector of ultrasonic wave partial discharge
CN219777663U (en) Nondestructive detector for steel structure
CN211826377U (en) DC motor rotor detecting instrument for railway
CN217655153U (en) Four-probe tester for power electronic devices
CN110346832B (en) Cascade device and underground measuring instrument

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant