Nothing Special   »   [go: up one dir, main page]

CN104568958B - A kind of light and the infrared nondestructive detection device of ULTRASONIC COMPLEX excitation - Google Patents

A kind of light and the infrared nondestructive detection device of ULTRASONIC COMPLEX excitation Download PDF

Info

Publication number
CN104568958B
CN104568958B CN201310485297.0A CN201310485297A CN104568958B CN 104568958 B CN104568958 B CN 104568958B CN 201310485297 A CN201310485297 A CN 201310485297A CN 104568958 B CN104568958 B CN 104568958B
Authority
CN
China
Prior art keywords
switch board
excitation system
infrared
computer
light
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.)
Active
Application number
CN201310485297.0A
Other languages
Chinese (zh)
Other versions
CN104568958A (en
Inventor
李璞
朱其芳
马通达
张东晖
张红菊
王福生
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.)
National standard (Beijing) inspection & Certification Co., Ltd.
Original Assignee
National Standard (beijing) Inspection & Certification 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 National Standard (beijing) Inspection & Certification Co Ltd filed Critical National Standard (beijing) Inspection & Certification Co Ltd
Priority to CN201310485297.0A priority Critical patent/CN104568958B/en
Publication of CN104568958A publication Critical patent/CN104568958A/en
Application granted granted Critical
Publication of CN104568958B publication Critical patent/CN104568958B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The invention discloses the infrared nondestructive detection device that a kind of light and ULTRASONIC COMPLEX of field of non destructive testing are encouraged.Described device includes computer, switch board, excitation system and infrared thermography;Wherein, the computer is connected with infrared thermography and switch board respectively;The computer is controlled with to detection process, and testing result is analyzed;The switch board is connected with the computer, excitation system and infrared thermography respectively;The switch board is used for the conversion of control signal and provides the power supply needed for excitation system;The excitation system is used to implement light stimulus and ultrasonic action to tested test specimens;The infrared thermography is used to record detected surface change of temperature field.The present invention is by combining testing result resulting under different energisation modes, improve accuracy in detection and the sensitivity of defect, the generation of the not enough defect of detectability under single incentive mode, reduction flase drop and missing inspection is compensate for, the application of Infrared Non-destructive Testing is expanded.

Description

A kind of light and the infrared nondestructive detection device of ULTRASONIC COMPLEX excitation
Technical field
The invention belongs to field of non destructive testing, more particularly to a kind of light and the Infrared Non-destructive Testing dress of ULTRASONIC COMPLEX excitation Put.
Background technology
Infrared thermal wave NDT technology is the emerging non-destructive testing technology grown up last century end, and it is by heat wave Incentive action is on test specimen, and specimen excitation energy simultaneously conducts into test specimen, when test specimen existing defects, due to defective part Position is different from the thermal characteristics of material for test and causes the abnormal distribution in surface of test piece temperature field, by infra-red thermal imaging system to temperature Analysis is identified in the exception of degree field, to reach the purpose of detection defect.Compared with conventional lossless detection method, inspection is especially suitable for Survey and a class fatigue damage such as monitoring crack, corrosion, unsticking developing fault, it is big, directly perceived, accurate with quick, observation area Really, advantage the features such as noncontact, is suitable for outfield application, online In-service testing.
One of key technology of infrared thermal wave NDT technology is the influence for studying energisation mode to testing result, i.e. pin To unlike material and the tested test specimen and defect of structure and the type of damage, the energisation mode of selection different qualities enters to test specimen Row heating.Conventional energisation mode mainly has light stimulus, ultrasonic action and electromagnetic excitation etc..Now domestic experimental rig and External existing infrared thermal wave NDT device, carries out external heat by the way of pulse flash thermal excitation to test specimen more, Technology maturation, accuracy in detection is high.But there is also some shortcomings, under pulse flash thermal excitation pattern, excitation energy and swash Encourage that the time is shorter, detectable depth is limited, it is impossible to find deeper internal injury;It is higher to the shape need of test specimen, it is unfavorable In to thicker and complex-shaped test specimen detect etc..
Ultrasonic action promotes to produce mechanical oscillation inside sample using ultrasonic action source, so that in rejected region because of thermoelastic The reasons such as effect, hysteresis effect and friction effect cause sound energy attenuation and discharge heat, cause local temperature rise.Due to ultrasound Excitation is that fault location is selectively heated, so as to shorten the distance of heat wave propagation, improve defects detection sensitivity and can Depth is detected, is adapted to the complicated test specimen of detection oversized shape, can make up to a certain extent under light stimulus pattern and detect energy The deficiency of power.
The content of the invention
For asking that the infrared thermal wave NDT technology mentioned in background technology exists in terms of sensitivity and the degree of accuracy Topic, the present invention proposes the infrared nondestructive detection device of a kind of light and ULTRASONIC COMPLEX excitation.
A kind of light and the infrared nondestructive detection device of ULTRASONIC COMPLEX excitation, it is characterised in that described device includes computer, Switch board, excitation system and infrared thermography;
Wherein, the computer is connected with infrared thermography and switch board respectively;The computer is used for detecting Journey is controlled, and testing result is analyzed;
The switch board is connected with the computer, excitation system and infrared thermography respectively;The switch board is used for The conversion of control signal simultaneously provides the power supply needed for excitation system;The excitation system is used to implement light stimulus to tested test specimens And ultrasonic action;The infrared thermography is used to record detected surface change of temperature field.
The computer is connected by IEEE1394 interfaces with infrared thermography, passes through RS232 connections and switch board Connection;The switch board is connected by triggers circuit with infrared thermography, by controlling cable to be connected with excitation system.
The switch board includes total power light, light stimulus module switch, ultrasonic action module switch, light stimulus control Module, ultrasonic action control module and voltage-stabilized power supply;The total power light, light stimulus module switch and ultrasonic action module Switch is installed on the switch board upper right corner;The light stimulus control module, ultrasonic action control module and voltage-stabilized power supply are arranged on control In cabinet processed.
The bottom of the switch board also includes universal wheel.
The excitation system includes light stimulus unit, ultrasonic action unit, sample bench unit, base and protective cover;It is described Light stimulus unit includes two Halogen lamp LEDs, camera aperture and stainless steel lamp bracket;The ultrasonic action unit includes ultrasound applicator and three-dimensional Mobile platform;The three-dimensional mobile platform includes two root posts, moving handle, guide rail mechanism, fixing bolt and bolt;Institute Stating sample bench unit includes two sample bench columns, entablature, sill and grip bolt;Described two Halogen lamp LEDs pass through stainless Steel lamp bracket is vertically fixed on base, is symmetrically arranged on camera aperture both sides;The two root posts bottom is equipped with guide rail mechanism, vertically It is installed on base, by adjusting fixing bolt, ultrasound applicator is carried out position adjustments in Y direction;Pass through mobile two root posts On bolt, make ultrasound applicator Z-direction carry out position adjustments;By handle in rotary moving, make ultrasound applicator in X-direction Move;Two sample bench uprights verticals are fixed on base, are parallel to each other;The entablature passes through spiral shell with sill Bolt is horizontally arranged between two sample bench columns;The entablature and sill are respectively mounted grip bolt and sample are consolidated It is fixed.
The protective cover is made up of stainless steel plate.
The power output of the Halogen lamp LED is 2000W, and fluorescent tube is strip, and reflecting surface is trapezoidal reflecting surface;It is described two Halogen lamp LED fluorescent tube axis is parallel to each other.
The ultrasound applicator is 200mm in the adjustable range that Y direction carries out position;The ultrasound applicator is carried out in Z-direction The adjustable range of position is 200mm;The ultrasound applicator is 20mm in the scope that X-direction is moved.
The two root posts, guide rail mechanism and moving handle include locking device.
Between the entablature and sill is 100-220mm away from adjustable range.
The infrared nondestructive detection device that the present invention is provided can easily switch thermal excitation pattern, when actually detected, can be to examination Sample carries out light stimulus detection and ultrasonic action detection at the same time or separately;Wherein light stimulus mode is suitable for detecting the hole sample Hole, bubble, it is mingled with isometric class defect;The end that suitable detection surface of test piece and near surface is motivated by ultrasound fuses, chromatographed, closing and split The interface such as line class defect, and the complicated test specimen of oversized shape can be detected.Obtained by combining under different energisation modes Testing result, improve accuracy in detection and the sensitivity of defect, compensate for that detectability under single incentive mode is not enough to be lacked Fall into, the generation of reduction flase drop and missing inspection expands the application of infrared detection.
Figure of description
Fig. 1 is the infrared thermal wave NDT system structure diagram that the present invention is provided;
Fig. 2 is the excitation system front view that the present invention is provided;
Fig. 3 is the excitation system top view that the present invention is provided;
Fig. 4 is the excitation system left view that the present invention is provided;
Fig. 5 is the switch board vertical section structure figure that the present invention is provided;
Wherein, 1- computers;2- switch boards;3- excitation systems;4- infrared thermographies;5- protective covers;6- ultrasound applicators;7- Three-dimensional mobile platform;8- moving handles;9- columns;10- bases;11- Halogen lamp LEDs;12- stainless steel lamp brackets;13- camera apertures;14- Entablature;15- sills;16- grip bolts;17- sample bench columns;18- guide rail mechanisms;19- bolts;20- fixes spiral shell Bolt;21- total power lights;22- light stimulus module switch;Module switch is motivated by ultrasound in 23-;24- light stimulus control modules; Control module is motivated by ultrasound in 25-;26- voltage-stabilized power supplies;27- universal wheels.
Embodiment
Below in conjunction with the accompanying drawings, preferred embodiment is elaborated.It should be emphasized that the description below is merely exemplary , the scope being not intended to be limiting of the invention and its application.
Fig. 1 is the infrared thermal wave NDT system structure diagram that the present invention is provided.It is provided by the present invention in Fig. 1 Infrared nondestructive detection device is made up of computer 1, switch board 2, excitation system 3 and infrared thermography 4.Computer 1 passes through IEEE1394 interfaces are connected with infrared thermography 4, carry out the collection and processing of thermal-induced imagery;By RS232 connections with Switch board 2 is connected, and process of the test is controlled.Switch board 2 is connected by triggers circuit with infrared thermography 4, to infrared Thermal imaging system 4 synchronizes external trigger operation;By controlling cable to be connected with excitation system 3, excitation electricity is provided excitation system 3 Source.
Fig. 2, Fig. 3 and Fig. 4 are front view, top view and the left view for the excitation system that the present invention is provided respectively.Wherein, swash System 3 is encouraged to be made up of light stimulus unit, sample bench unit, ultrasonic action unit and protective cover 5.Excitation system 3 is integrated to be set Meter, each unit is arranged on base 10, and is protected by protective cover 5.
Light stimulus unit is two powerful Halogen lamp LEDs 11, and peak power output is 2000W, and fluorescent tube is strip, instead Face is penetrated for trapezoidal reflecting surface, two Halogen lamp LED fluorescent tube axis are parallel to each other, and are vertically fixed on base by stainless steel lamp bracket 12 On 10, the both sides of camera aperture 13 are symmetrically arranged on, controllable function heat wave can be carried out to sample and encouraged.
Ultrasonic action unit is made up of ultrasound applicator 6 and three-dimensional mobile platform 7, and ultrasound applicator 6 is fixed on three-dimensional mobile platform 7 On, horizontal pulse and continuous two kinds of ultrasonic action modes can be entered to sample.Three-dimensional mobile platform 7 is by column 9, moving handle 8, guide rail Mechanism 18 and the grade of bolt 19 are constituted.The bottom of two root posts 9 is equipped with guide rail mechanism 18, is installed vertically on base 10, leads to Position adjustments can be carried out in Y direction by overregulating fixing bolt 20, and adjustable extent is 200mm.By in mobile two root posts 9 Bolt 19, can make ultrasound applicator carry out position adjustments in Z-direction, adjustable extent is 200mm.Pass through handle 8 in rotary moving Ultrasound applicator 6 can be made to be moved in X-direction, mobile range is 20mm.Column 9, guide rail mechanism 18 and moving handle 8 are all There is locking device, to ensure that the initial pressure between ultrasound applicator 6 and sample keeps constant, and avoid ultrasound applicator 6 during encouraging Slide, the energy of ultrasound is fully used, improve the efficiency that sample is motivated by ultrasound.
Sample bench unit is made up of sample bench column 17, entablature 14, sill 15 and grip bolt 16.Two sample bench Column 17 is vertically fixed on base 10, is parallel to each other, and entablature 14 is horizontally arranged at two by bolt with sill 15 and stood Between post 17, the spacing between two crossbeams can be adjusted, and adjustable range is 100-220mm, and pass through on lower and upper cross-member 14,15 points Sample is fixed the grip bolt 16 do not installed, the need for meeting different sized samples detections.
Protective cover 5 is made up of stainless steel plate, can carry out necessary masking to test specimen during work, it is to avoid implement infrared inspection The influence of external environment during survey, while being improved using double excitation source symmetric arrangement and the irreflexive supplementary function of protective cover to examination The uniformity of sample thermal excitation, improves the degree of accuracy of detection.
Fig. 5 is the switch board vertical section structure figure that the present invention is provided.In Fig. 5, switch board 3 by light stimulus control module 24, Ultrasonic action control module 25 and voltage-stabilized power supply 26 are constituted;The upper right side of switch board 3 is provided with total power light 21, light stimulus control Module switch 22 processed and ultrasonic action control module switch 23, during work, can be switched by opening or closing two control modules Carry out the switching of energisation mode.Light stimulus unit in the control excitation system 3 of light stimulus control module 24, can adjust light stimulus The parameters such as power output, frequency, waveform, working time and delay start time, adjustable range is:Power output 0-2000W, it is defeated Go out frequency 0.01-50Hz, waveform is sine wave, square wave or triangular wave, working time 0.02-1000S, m- during delay start 10s-10s(Control accuracy 20ms);The ultrasonic action unit in the control excitation system 3 of control module 25 is motivated by ultrasound, can adjust The parameter such as the power output of ultrasound applicator 6 and working time, adjustable range is:Power output 0-300W, working time 0.02- 1000S;Voltage-stabilized power supply 26 is that switch board 2 and excitation system 3 provide power supply;Light stimulus control module 24, ultrasonic action control mould Block 25 and voltage-stabilized power supply 26 carry out integrated design, unified to be arranged in switch board;Switch board bottom is equipped with universal wheel 27, can be square Just in detection onsite application.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto, Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in, It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims It is defined.

Claims (8)

1. a kind of light and the infrared nondestructive detection device of ULTRASONIC COMPLEX excitation, it is characterised in that described device includes computer, control Cabinet processed, excitation system and infrared thermography;
Wherein, the computer is connected with infrared thermography and switch board respectively;The computer is carried out with to detection process Control, and testing result is analyzed;
The switch board is connected with the computer, excitation system and infrared thermography respectively;The switch board is used to control The conversion of signal simultaneously provides the power supply needed for excitation system;The excitation system is used to implement light stimulus and super to tested test specimens Acoustically-driven;The infrared thermography is used to record detected surface change of temperature field;
The excitation system includes light stimulus unit, ultrasonic action unit, sample bench unit, base and protective cover;The light swashs Encouraging unit includes two Halogen lamp LEDs, camera aperture and stainless steel lamp bracket;The ultrasonic action unit includes ultrasound applicator and three-dimensional is moved Platform;The three-dimensional mobile platform includes two root posts, moving handle, guide rail mechanism, fixing bolt and bolt;The examination Sample platform unit includes two sample bench columns, entablature, sill and grip bolt;Described two Halogen lamp LEDs pass through stainless steel lamp Frame is vertically fixed on base, is symmetrically arranged on camera aperture both sides;The two root posts bottom is equipped with guide rail mechanism, right angle setting In on base, by adjusting fixing bolt, ultrasound applicator is set to carry out position adjustments in Y direction;By in mobile two root posts Bolt, makes ultrasound applicator carry out position adjustments in Z-direction;By handle in rotary moving, ultrasound applicator is set to be carried out in X-direction It is mobile;Two sample bench uprights verticals are fixed on base, are parallel to each other;The entablature passes through bolt water with sill Safety is between two sample bench columns;The entablature and sill are respectively mounted 4 grip bolts and sample are consolidated It is fixed;
The protective cover is made up of stainless steel plate.
2. device according to claim 1, it is characterised in that the computer passes through the interfaces of IEEE 1394 and infrared heat Imager is connected, and is connected by RS232 connections with switch board;The switch board is connected by triggers circuit and infrared thermography Connect, by controlling cable to be connected with excitation system.
3. device according to claim 1, it is characterised in that the switch board includes total power light, light stimulus mould Block switch, ultrasonic action module switch, light stimulus control module, ultrasonic action control module and voltage-stabilized power supply;The general supply Indicator lamp, light stimulus module switch and ultrasonic action module switch are installed on the switch board upper right corner;The light stimulus control module, Control module is motivated by ultrasound and voltage-stabilized power supply is arranged in switch board.
4. device according to claim 3, it is characterised in that the bottom of the switch board also includes universal wheel.
5. device according to claim 1, it is characterised in that the power output of the Halogen lamp LED is 2000W, fluorescent tube is length Bar shaped, reflecting surface is trapezoidal reflecting surface;Described two Halogen lamp LED fluorescent tube axis are parallel to each other.
6. device according to claim 1, it is characterised in that the ultrasound applicator carries out the regulation model of position in Y direction Enclose for 200mm;The ultrasound applicator is 200mm in the adjustable range that Z-direction carries out position;The ultrasound applicator enters in X-direction The mobile scope of row is 20mm.
7. device according to claim 1, it is characterised in that the two root posts, guide rail mechanism and moving handle are included Locking device.
8. device according to claim 1, it is characterised in that between the entablature and sill is away from adjustable range 100-220mm。
CN201310485297.0A 2013-10-16 2013-10-16 A kind of light and the infrared nondestructive detection device of ULTRASONIC COMPLEX excitation Active CN104568958B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310485297.0A CN104568958B (en) 2013-10-16 2013-10-16 A kind of light and the infrared nondestructive detection device of ULTRASONIC COMPLEX excitation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310485297.0A CN104568958B (en) 2013-10-16 2013-10-16 A kind of light and the infrared nondestructive detection device of ULTRASONIC COMPLEX excitation

Publications (2)

Publication Number Publication Date
CN104568958A CN104568958A (en) 2015-04-29
CN104568958B true CN104568958B (en) 2017-08-04

Family

ID=53085527

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310485297.0A Active CN104568958B (en) 2013-10-16 2013-10-16 A kind of light and the infrared nondestructive detection device of ULTRASONIC COMPLEX excitation

Country Status (1)

Country Link
CN (1) CN104568958B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TR201620208A1 (en) * 2016-12-30 2018-07-23 Ford Otomotiv Sanayi As COMPACT VIBRATION AND NOISE MAPPING SYSTEM AND METHOD
CN107782786B (en) * 2017-09-27 2024-05-28 重庆交通大学 Steel structure corrosion detection device and method based on pulse microwave heating vibration measurement
CN108088566A (en) * 2017-12-20 2018-05-29 中国人民解放军陆军装甲兵学院 A kind of detection device of test specimen internal flaw
CN109613063A (en) * 2019-01-17 2019-04-12 四川大学 A kind of device and method based on face battle array pulse laser excitation detection thermal barrier coating face
CN109900741B (en) * 2019-04-03 2020-07-07 哈尔滨商业大学 Infrared thermal wave nondestructive testing device and method considering rising edge and falling edge of pulse thermal excitation signal
CN110095502B (en) * 2019-05-13 2021-10-22 合肥工业大学 Device for carrying out infrared road disease nondestructive testing by transmitting electromagnetism or microwaves
CN112991260A (en) * 2021-02-03 2021-06-18 南昌航空大学 Infrared nondestructive testing system with light and ultrasonic composite excitation
CN113237919A (en) * 2021-03-23 2021-08-10 南京诺尔泰复合材料设备制造有限公司 Pultrusion equipment provided with wind blade fiber beam plate detection device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7716987B2 (en) * 2006-07-31 2010-05-18 University Of Dayton Non-contact thermo-elastic property measurement and imaging system for quantitative nondestructive evaluation of materials
IL185130A0 (en) * 2007-08-08 2008-01-06 Semi Conductor Devices An Elbi Thermal based system and method for detecting counterfeit drugs
CN201518010U (en) * 2008-04-04 2010-06-30 中国人民解放军空军第一航空学院 Infrared nondestructive detection device made of composite material for airplane
JP2011038838A (en) * 2009-08-07 2011-02-24 Beteru:Kk Thermal device and method for measuring infrared output
CN102033081A (en) * 2010-10-15 2011-04-27 哈尔滨工业大学 Infrared lock-in thermal wave non-destructive detection method based on image sequence processing
CN202548078U (en) * 2012-03-29 2012-11-21 冯辅周 Ultrasonic pulse excitation device with controllable parameters

Also Published As

Publication number Publication date
CN104568958A (en) 2015-04-29

Similar Documents

Publication Publication Date Title
CN104568958B (en) A kind of light and the infrared nondestructive detection device of ULTRASONIC COMPLEX excitation
Zhao Review of non-destructive testing methods for defect detection of ceramics
Wang et al. Comparative analysis of eddy current pulsed thermography and long pulse thermography for damage detection in metals and composites
Gaudenzi et al. On the evaluation of impact damage on composite materials by comparing different NDI techniques
ES2541221T3 (en) Wrinkle detection method in a fiber reinforced laminated structure
CN205374371U (en) Magneto -optic formation of image nondestructive test platform
Kuhn et al. A comparison between thermosonics and thermography for delamination detection in polymer matrix laminates
CN103698393A (en) Magneto-optical imaging nondestructive detection method of weld defects
CN207351966U (en) The automatic ultrasonic detection device and system of sheet metal
CN203216857U (en) Infrared detection device for metal defects
Ji et al. Non-contact detection of delamination in stainless steel/carbon steel composites with laser ultrasonic
CN103487443A (en) Electromagnetic induction thermal excitation method based pipeline defect infrared detection system
Montinaro et al. Evaluation of interlaminar delaminations in titanium-graphite fibre metal laminates by infrared NDT techniques
CN209589902U (en) A kind of infrared thermal imagery method concrete crack detector based on electromagnetic induction heating
EP3014255B1 (en) Modular device for structural diagnostics of various materials and structures, using thermographic techniques based on multiple excitations
CN203259502U (en) Water tank type slab ultrasonic flaw detection device through using water immersion method
CN103808760A (en) Thermal excitation device for infrared thermal imaging nondestructive detection on concrete structure
WO2019233111A1 (en) Detection device for composite wing dynamic characteristics and damage of unmanned aerial vehicle under wind-sand and heat environments
CN109839254A (en) It is a kind of based on the composite material heat reversely to resonate vibration fatigue experimental device and method
Pastuszak et al. Methods of infrared non-destructive techniques: review and experimental studies
CN104729435A (en) Sheet thickness online measurement system based on laser ultrasound
Wang et al. A portable fiber laser thermography system with beam homogenizing for CFRP inspection
Orłowska et al. Detecting delamination zones in composites by embedded electrical grid and thermographic methods
Pinto et al. Material enabled thermography
Maierhofer et al. Quantification of impact damages in CFRP and GFRP structures with thermography and ultrasonics

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C41 Transfer of patent application or patent right or utility model
TA01 Transfer of patent application right

Effective date of registration: 20160715

Address after: Yang Yanlu 101407 Beijing city Huairou District Yanqi Economic Development Zone No. 88

Applicant after: National standard (Beijing) inspection & Certification Co., Ltd.

Address before: 100088 Beijing city Xicheng District Xinjiekou Avenue No. 2

Applicant before: General Research Institute for Nonferrous Metals

GR01 Patent grant
GR01 Patent grant