CN107144417A - A kind of method of testing and system of waveguide coaxial converter insertion loss - Google Patents

A kind of method of testing and system of waveguide coaxial converter insertion loss Download PDF

Info

Publication number
CN107144417A
CN107144417A CN201710343219.5A CN201710343219A CN107144417A CN 107144417 A CN107144417 A CN 107144417A CN 201710343219 A CN201710343219 A CN 201710343219A CN 107144417 A CN107144417 A CN 107144417A
Authority
CN
China
Prior art keywords
coaxial converter
waveguide coaxial
waveguide
insertion loss
tested
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
CN201710343219.5A
Other languages
Chinese (zh)
Other versions
CN107144417B (en
Inventor
潘猛
文春华
刘长春
姜万顺
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.)
CETC 41 Institute
Original Assignee
CETC 41 Institute
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 CETC 41 Institute filed Critical CETC 41 Institute
Priority to CN201710343219.5A priority Critical patent/CN107144417B/en
Publication of CN107144417A publication Critical patent/CN107144417A/en
Application granted granted Critical
Publication of CN107144417B publication Critical patent/CN107144417B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30Testing of optical devices, constituted by fibre optics or optical waveguides

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

The invention discloses a kind of method of testing and system of waveguide coaxial converter insertion loss.Wherein, waveguide coaxial converter to be tested has identical rectangular waveguide interface, and the quantity of waveguide coaxial converter to be tested is at least three;The method of testing of waveguide coaxial converter insertion loss, including respectively concatenate waveguide coaxial converter to be tested in pairs by rectangular waveguide interface, and record the overall insertion loss for the waveguide coaxial converter in pairs surveyed;Obtain the relation equation group of the overall insertion loss for being actually inserted into loss and the waveguide coaxial converter in pairs surveyed of each waveguide coaxial converter to be tested;Solve above-mentioned relation equation group, so obtain each waveguide coaxial converter to be tested be actually inserted into loss.

Description

A kind of method of testing and system of waveguide coaxial converter insertion loss
Technical field
The invention belongs to waveguide coaxial converter field, more particularly to a kind of test of waveguide coaxial converter insertion loss Method and system.
Background technology
The end interface of waveguide coaxial converter one be coaxial connector, an end interface be rectangular waveguide, can be achieved coaxial line with Interconnection between rectangular waveguide.The end interface of waveguide coaxial converter two it is different, it is necessary to paired waveguide coaxial converter " back to The progress of the back of the body " is tested.Conventional method is all based on " electrical length of two waveguide coaxial converters is identical " this hypothesis.Will be overall The insertion loss of test is multiplied by 1/2, the insertion loss of as single waveguide coaxial converter.
Existing method of testing is based on " electrical length of two waveguide coaxial connecters is identical " this hypothesis.However, two The waveguide coaxial converter of identical structure, insertion loss can also have small difference, and existing method of testing can not be accurate The insertion loss for calculating each waveguide coaxial converter, the waveguide coaxial converter of different types of structure can not be tested.
The content of the invention
In order to solve the deficiencies in the prior art, the invention provides a kind of test side of waveguide coaxial converter insertion loss Method, what this method can accurately calculate single waveguide coaxial converter is actually inserted into loss.
The method of testing of the waveguide coaxial converter insertion loss of the present invention, wherein, waveguide coaxial converter to be tested With identical rectangular waveguide interface, the quantity of waveguide coaxial converter to be tested is at least three;
The method of testing of waveguide coaxial converter insertion loss, including:
Waveguide coaxial converter to be tested is concatenated in pairs by rectangular waveguide interface respectively, and records what is surveyed The overall insertion loss of waveguide coaxial converter in pairs;
Obtain each waveguide coaxial converter to be tested is actually inserted into loss and the Waveguide coaxial in pairs surveyed The relation equation group of the overall insertion loss of converter;
Solve above-mentioned relation equation group, so obtain each waveguide coaxial converter to be tested be actually inserted into loss.
Further, the entirety that the waveguide coaxial converter in pairs surveyed is recorded using vector network analyzer is inserted Enter loss.
Wherein, vector network analyzer is double (or four) passage microwave receiver, can carry out automatic network for handling Transmitted wave and back wave amplitude and phase, and then can detect and record waveguide coaxial converter in pairs entirety insert Enter loss.
Further, the overall insertion loss for the waveguide coaxial converter in pairs surveyed, which is equal to, to be surveyed in pairs The respective of waveguide coaxial converter is actually inserted into loss sum.
Present invention also offers a kind of test system of waveguide coaxial converter insertion loss.
A kind of test system of waveguide coaxial converter insertion loss of the present invention, waveguide coaxial converter to be tested is equal With identical rectangular waveguide interface, wherein, the quantity of waveguide coaxial converter to be tested is at least three;
The test system of the waveguide coaxial converter insertion loss, including:
Vector network analyzer, its overall insertion for being used to record the waveguide coaxial converter in pairs surveyed respectively is damaged Consumption;Wherein, waveguide coaxial converter device is concatenated in pairs by identical rectangular waveguide interface in pairs;And processor, it is used The overall insertion loss of the waveguide coaxial converter in pairs come is transmitted in receiving the vector network analyzer, and then is obtained The entirety for being actually inserted into loss and the waveguide coaxial converter in pairs surveyed of each waveguide coaxial converter to be tested The relation equation group of insertion loss;Above-mentioned relation equation group is solved, each waveguide coaxial converter to be tested is finally given It is actually inserted into loss.
Further, the overall insertion loss for the waveguide coaxial converter in pairs surveyed, which is equal to, to be surveyed in pairs The respective of waveguide coaxial converter is actually inserted into loss sum.
Further, the processor is also connected with display, and the display is used to show each waveguide to be tested Coaxial converter is actually inserted into loss.
Further, the vector network analyzer is connected with processor by wireless communication module.The present invention passes through nothing Line communication module avoids the position limitation of modules unit in the test system of waveguide coaxial converter insertion loss.
Further, the vector network analyzer is connected with processor by cable.
Further, the processor is also connected with memory.
Further, the processor is also connected with cloud server, and the cloud server is defeated for storing processor Each waveguide coaxial converter to be tested for going out is actually inserted into loss.
Compared with prior art, the beneficial effects of the invention are as follows:
(1) waveguide coaxial converter to be tested is respectively mounted identical interface by the present invention, respectively by waveguide to be tested Coaxial converter is concatenated in pairs by identical rectangular waveguide interface, and records the waveguide coaxial connecter in pairs surveyed The overall insertion loss of device, obtains being actually inserted into loss and being surveyed in pairs for each waveguide coaxial converter to be tested The relation equation group of the overall insertion loss of waveguide coaxial converter;Above-mentioned relation equation group is solved, and then can accurately be counted Calculate the insertion loss of single waveguide coaxial converter.
(2) present invention can be tested for the waveguide coaxial converter of different types of structure, it is only necessary to be tested Waveguide coaxial converter is mounted on identical rectangular waveguide interface.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing further understanding of the present application, and the application's shows Meaning property embodiment and its illustrate be used for explain the application, do not constitute the improper restriction to the application.
Fig. 1 is the method for testing flow chart of the waveguide coaxial converter insertion loss of the present invention;
Fig. 2 is the test system structure schematic diagram of the waveguide coaxial converter insertion loss of the present invention.
Embodiment
It is noted that described further below is all exemplary, it is intended to provide further instruction to the application.Unless another Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
Fig. 1 is the method for testing flow chart of the waveguide coaxial converter insertion loss of the present invention.
As shown in figure 1, the method for testing of the waveguide coaxial converter insertion loss of the present invention, wherein, waveguide to be tested Coaxial converter has identical rectangular waveguide interface, and the quantity of waveguide coaxial converter to be tested is at least three;
The method of testing of waveguide coaxial converter insertion loss, including:
Step 1:Waveguide coaxial converter to be tested is concatenated in pairs by rectangular waveguide interface respectively, and recorded The overall insertion loss for the waveguide coaxial converter in pairs surveyed;
In this step, the entirety for the waveguide coaxial converter in pairs surveyed is recorded using vector network analyzer Insertion loss.
Wherein, vector network analyzer is double (or four) passage microwave receiver, can carry out automatic network for handling Transmitted wave and back wave amplitude and phase, and then can detect and record waveguide coaxial converter in pairs entirety insert Enter loss.
The present embodiment is by taking the waveguide coaxial converter of three same-interfaces as an example below:
During test, measured piece is tested in pairs, and records the overall insertion loss surveyed every time.
If the insertion loss for the waveguide coaxial converter tested is respectively:LA, LB, LC, the overall insertion of pairwise testing Loss is respectively:L1、L2、l3.
Step 2:Obtain each waveguide coaxial converter to be tested is actually inserted into loss and the ripple in pairs surveyed The relation equation group of the overall insertion loss of guiding coaxial converter.
Wherein, the overall insertion loss for the waveguide coaxial converter in pairs surveyed is equal to the waveguide in pairs surveyed The respective of coaxial converter is actually inserted into loss sum.
Obtained relation equation group is:
LA+LB=L1;
LB+LC=L2;
LA+LC=L3.
Step 3:Above-mentioned relation equation group is solved, and then obtains being actually inserted into for each waveguide coaxial converter to be tested Loss.
Pass through simple calculations, you can obtain the actual insertion loss of each waveguide coaxial converter.
LA=(L1+L3-L2)/2;
LB=(L1+L2-L3)/2;
LC=(L2+L3-L2)/2.
Waveguide coaxial converter to be tested is respectively mounted identical interface by the present invention, respectively by Waveguide coaxial to be tested Converter is concatenated in pairs by identical interface, and records the overall insertion for the waveguide coaxial converter in pairs surveyed Loss, obtain each waveguide coaxial converter to be tested is actually inserted into loss and the waveguide coaxial connecter in pairs surveyed The relation equation group of the overall insertion loss of device;Above-mentioned relation equation group is solved, and then can accurately calculate single waveguide The insertion loss of coaxial converter.
The present invention can be tested for the waveguide coaxial converter of different types of structure, it is only necessary to waveguide to be tested Coaxial converter is mounted on identical interface.
Fig. 2 is the test system structure schematic diagram of the waveguide coaxial converter insertion loss of the present invention.
As shown in Fig. 2 a kind of test system of waveguide coaxial converter insertion loss of the present invention, waveguide to be tested is same Axle converter is mounted on identical rectangular waveguide interface, wherein, the quantity of waveguide coaxial converter to be tested is at least three It is individual;
The test system of the waveguide coaxial converter insertion loss, including:Vector network analyzer and processor.
(1) vector network analyzer, its entirety for being used to record the waveguide coaxial converter in pairs surveyed respectively is inserted Enter loss;Wherein, waveguide coaxial converter device is concatenated in pairs by identical rectangular waveguide interface in pairs.
(2) processor, it is used to receive the waveguide coaxial converter in pairs that the vector network analyzer transmission comes Overall insertion loss, and then obtain each waveguide coaxial converter to be tested be actually inserted into loss and two twenty percents surveyed To the relation equation group of the overall insertion loss of waveguide coaxial converter;Above-mentioned relation equation group is solved, each treat is finally given The waveguide coaxial converter of test is actually inserted into loss.
Wherein, the overall insertion loss for the waveguide coaxial converter in pairs surveyed is equal to the waveguide in pairs surveyed The respective of coaxial converter is actually inserted into loss sum.
In another embodiment, processor is also connected with display, and the display is used to show each ripple to be tested Guiding coaxial converter is actually inserted into loss.
In one embodiment, the vector network analyzer is connected with processor by wireless communication module.The present invention The position limit of modules unit in the test system of waveguide coaxial converter insertion loss is avoided by wireless communication module System.
In another embodiment, the vector network analyzer is connected with processor by cable.
In one embodiment, the processor is also connected with memory.Wherein memory is exported for cache processor Each waveguide coaxial converter to be tested be actually inserted into loss.
In another embodiment, the processor is also connected with cloud server, and the cloud server is used at storage That manages each waveguide coaxial converter to be tested that device is exported is actually inserted into loss.
Waveguide coaxial converter to be tested is respectively mounted identical interface by the present invention, respectively by Waveguide coaxial to be tested Converter is concatenated in pairs by identical rectangular waveguide interface, and records the waveguide coaxial converter in pairs surveyed Overall insertion loss, obtain each waveguide coaxial converter to be tested is actually inserted into loss and the waveguide in pairs surveyed The relation equation group of the overall insertion loss of coaxial converter;Above-mentioned relation equation group is solved, and then can accurately be calculated The insertion loss of single waveguide coaxial converter.
The present invention can be tested for the waveguide coaxial converter of different types of structure, it is only necessary to waveguide to be tested Coaxial converter is mounted on identical rectangular waveguide interface.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, not to present invention protection model The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not Need to pay various modifications or deform still within protection scope of the present invention that creative work can make.

Claims (10)

1. a kind of method of testing of waveguide coaxial converter insertion loss, it is characterised in that waveguide coaxial converter to be tested With identical rectangular waveguide interface, the quantity of waveguide coaxial converter to be tested is at least three;
The method of testing of waveguide coaxial converter insertion loss, including:
Waveguide coaxial converter to be tested is concatenated in pairs by rectangular waveguide interface respectively, and record is surveyed two-by-two The overall insertion loss of paired waveguide coaxial converter;
Obtain each waveguide coaxial converter to be tested is actually inserted into loss and the waveguide coaxial connecter in pairs surveyed The relation equation group of the overall insertion loss of device;
Solve above-mentioned relation equation group, so obtain each waveguide coaxial converter to be tested be actually inserted into loss.
2. a kind of method of testing of waveguide coaxial converter insertion loss as claimed in claim 1, it is characterised in that using arrow Network Analyzer is measured to record the overall insertion loss for the waveguide coaxial converter in pairs surveyed.
3. a kind of method of testing of waveguide coaxial converter insertion loss as claimed in claim 1, it is characterised in that surveyed The overall insertion loss of waveguide coaxial converter is equal to the respective reality for the waveguide coaxial converter in pairs surveyed in pairs Border insertion loss sum.
4. a kind of test system of waveguide coaxial converter insertion loss, it is characterised in that waveguide coaxial converter to be tested Interface with identical rectangular waveguide, wherein, the quantity of waveguide coaxial converter to be tested is at least three;
The test system of the waveguide coaxial converter insertion loss, including:
Vector network analyzer, it is used for the overall insertion loss for recording the waveguide coaxial converter in pairs surveyed respectively; Wherein, waveguide coaxial converter device is concatenated in pairs by identical rectangular waveguide interface in pairs;And
Processor, its entirety for being used to receive the waveguide coaxial converter in pairs that the vector network analyzer transmission comes is inserted Enter loss, and then it is same to obtain the waveguide in pairs for being actually inserted into loss with being surveyed of each waveguide coaxial converter to be tested The relation equation group of the overall insertion loss of axle converter;Above-mentioned relation equation group is solved, each ripple to be tested is finally given Guiding coaxial converter is actually inserted into loss.
5. a kind of test system of waveguide coaxial converter insertion loss as claimed in claim 4, it is characterised in that surveyed The overall insertion loss of waveguide coaxial converter is equal to the respective reality for the waveguide coaxial converter in pairs surveyed in pairs Border insertion loss sum.
6. a kind of test system of waveguide coaxial converter insertion loss as claimed in claim 4, it is characterised in that the place Reason device is also connected with display, and the display is actually inserted into damage for show each waveguide coaxial converter to be tested Consumption.
7. a kind of test system of waveguide coaxial converter insertion loss as claimed in claim 4, it is characterised in that the arrow Amount Network Analyzer is connected with processor by wireless communication module.
8. a kind of test system of waveguide coaxial converter insertion loss as claimed in claim 4, it is characterised in that the arrow Amount Network Analyzer is connected with processor by cable.
9. a kind of test system of waveguide coaxial converter insertion loss as claimed in claim 4, it is characterised in that the place Reason device is also connected with memory.
10. a kind of test system of waveguide coaxial converter insertion loss as claimed in claim 4, it is characterised in that described Processor is also connected with cloud server, and each waveguide to be tested that the cloud server is used to store processor output is same Axle converter is actually inserted into loss.
CN201710343219.5A 2017-05-16 2017-05-16 A kind of test method and system of waveguide coaxial converter insertion loss Active CN107144417B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710343219.5A CN107144417B (en) 2017-05-16 2017-05-16 A kind of test method and system of waveguide coaxial converter insertion loss

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710343219.5A CN107144417B (en) 2017-05-16 2017-05-16 A kind of test method and system of waveguide coaxial converter insertion loss

Publications (2)

Publication Number Publication Date
CN107144417A true CN107144417A (en) 2017-09-08
CN107144417B CN107144417B (en) 2019-01-04

Family

ID=59777627

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710343219.5A Active CN107144417B (en) 2017-05-16 2017-05-16 A kind of test method and system of waveguide coaxial converter insertion loss

Country Status (1)

Country Link
CN (1) CN107144417B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110531167A (en) * 2019-09-16 2019-12-03 西安兆格电子信息技术有限公司 A kind of cable pathways Insertion Loss measuring device and measurement method
CN108919057B (en) * 2018-08-07 2020-06-16 哈尔滨工业大学 Method for processing insertion loss problem in cable fault diagnosis

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988009063A1 (en) * 1987-05-04 1988-11-17 Motorola, Inc. Cableless switching element for waveguide having low loss and fast switching speed
CN1045180A (en) * 1989-02-01 1990-09-05 中央通讯科学研究所列宁格勒分所 Measure the method for optical loss in the butt joint photoconduction with reflected light
JP2002131181A (en) * 2000-10-23 2002-05-09 Advantest Corp Loss measuring device for photodetector element
CN201773921U (en) * 2010-08-04 2011-03-23 杨春 Waveguide coaxial microwave converter
CN104062510A (en) * 2014-07-07 2014-09-24 中国船舶重工集团公司第七二四研究所 Method for measuring insertion loss of feeder line switching between two distant ports and enabling measuring errors to be smaller
CN104849570A (en) * 2015-05-26 2015-08-19 中国传媒大学 Method for testing material electromagnetic parameter based on artificial magnetic conductor rectangular waveguide
CN104849585A (en) * 2015-04-16 2015-08-19 中国电子科技集团公司第四十一研究所 System and method for optical device S parameter measurement based on vector network analyzer
US20160164601A1 (en) * 2014-12-09 2016-06-09 Exfo Inc. Method for referencing an optical power loss measurement system, and associated computer readable memory and oplm system
CN106019014A (en) * 2016-06-15 2016-10-12 中国工程物理研究院应用电子学研究所 Test system and test method for concentrated attenuator for folded waveguide traveling wave tube
CN106027170A (en) * 2016-05-26 2016-10-12 中国船舶重工集团公司第七二二研究所 Digital miniature channel equipment automatic test device and system
US9570788B2 (en) * 2013-03-19 2017-02-14 Texas Instruments Incorporated Dielectric waveguide combined with electrical cable

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988009063A1 (en) * 1987-05-04 1988-11-17 Motorola, Inc. Cableless switching element for waveguide having low loss and fast switching speed
CN1045180A (en) * 1989-02-01 1990-09-05 中央通讯科学研究所列宁格勒分所 Measure the method for optical loss in the butt joint photoconduction with reflected light
JP2002131181A (en) * 2000-10-23 2002-05-09 Advantest Corp Loss measuring device for photodetector element
CN201773921U (en) * 2010-08-04 2011-03-23 杨春 Waveguide coaxial microwave converter
US9570788B2 (en) * 2013-03-19 2017-02-14 Texas Instruments Incorporated Dielectric waveguide combined with electrical cable
CN104062510A (en) * 2014-07-07 2014-09-24 中国船舶重工集团公司第七二四研究所 Method for measuring insertion loss of feeder line switching between two distant ports and enabling measuring errors to be smaller
US20160164601A1 (en) * 2014-12-09 2016-06-09 Exfo Inc. Method for referencing an optical power loss measurement system, and associated computer readable memory and oplm system
CN104849585A (en) * 2015-04-16 2015-08-19 中国电子科技集团公司第四十一研究所 System and method for optical device S parameter measurement based on vector network analyzer
CN104849570A (en) * 2015-05-26 2015-08-19 中国传媒大学 Method for testing material electromagnetic parameter based on artificial magnetic conductor rectangular waveguide
CN106027170A (en) * 2016-05-26 2016-10-12 中国船舶重工集团公司第七二二研究所 Digital miniature channel equipment automatic test device and system
CN106019014A (en) * 2016-06-15 2016-10-12 中国工程物理研究院应用电子学研究所 Test system and test method for concentrated attenuator for folded waveguide traveling wave tube

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
邱景辉等: ""超宽嵌套同轴波导组合馈源的实验研究"", 《微波学报》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108919057B (en) * 2018-08-07 2020-06-16 哈尔滨工业大学 Method for processing insertion loss problem in cable fault diagnosis
CN110531167A (en) * 2019-09-16 2019-12-03 西安兆格电子信息技术有限公司 A kind of cable pathways Insertion Loss measuring device and measurement method

Also Published As

Publication number Publication date
CN107144417B (en) 2019-01-04

Similar Documents

Publication Publication Date Title
CN109738714A (en) The method and device of secondary nuclear phase
CN107144417A (en) A kind of method of testing and system of waveguide coaxial converter insertion loss
US20140016930A1 (en) Monitoring optical decay in fiber connectivity systems
CN101916951B (en) Cable group and electronic apparatus
CN102565753A (en) Portable electromagnetic compatibility (EMC) test-level pulse timer for electric energy meter
CN101834679B (en) Port test method, device and system
CN105490068B (en) A kind of spliced network connection for electric system
CN104111402B (en) The Wiring detection method of the cross interconnected system of a kind of power cable and device
CN104062510B (en) The two-port reciprocity feeder line insert loss method farther out of measurement error can be reduced
CN106546943A (en) The method and apparatus that a kind of error in dipping and loss on transmission are tested oneself
CN207718361U (en) PCM signal harvester and system
CN109542706A (en) A kind of connector detection method, device, equipment and system
CN204405814U (en) A kind of electronic load tester with power meter function
CN207304569U (en) Test structure for fixed attenuator
CN203275563U (en) Cable wire correspondence device
CN112630558A (en) Park electric energy quality analysis system and control method
CN208158632U (en) Electric energy metering system data intelligence processing system
CN203932172U (en) Lithium battery group wiring construction
CN205484640U (en) Simple and easy net twine tester
CN205122876U (en) A concatenation formula internet access line for electric power system
CN208400110U (en) A kind of comprehensive multibus monitoring system
CN209248746U (en) Electricity monitoring device based on Internet of Things
CN214480666U (en) Clamp for verifying ten-gigabit Ethernet signal power back-off
CN213482433U (en) Equipment for preventing wrong connection
CN212749194U (en) Hand-held type electric leakage detector

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