CN203116893U - Hidden weld joint stress monitoring device for orthotropic steel bridge decks - Google Patents
Hidden weld joint stress monitoring device for orthotropic steel bridge decks Download PDFInfo
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- CN203116893U CN203116893U CN 201320133219 CN201320133219U CN203116893U CN 203116893 U CN203116893 U CN 203116893U CN 201320133219 CN201320133219 CN 201320133219 CN 201320133219 U CN201320133219 U CN 201320133219U CN 203116893 U CN203116893 U CN 203116893U
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Abstract
The utility model discloses a hidden weld joint stress monitoring device for orthotropic steel bridge decks. The hidden weld joint stress monitoring device comprises a data measuring module, a data acquiring module and a data processing module. The data measuring module comprises an optical fiber strain sensor disposed along the edge of a connecting weld joint of a U-rib and a bridge deck slab of an orthotropic steel bridge deck, and a temperature tester is arranged in the optical fiber strain sensor. The data acquiring module responds to a data acquiring command to transmit excitation signals of the operating data measuring module and acquires data measured by the data measuring module to be converted into effective data. The data processing module transmits the data acquiring command to the data acquiring module, receives effective data converted by the data acquiring module, calculates stress value of the weld joint according to the effective data, and outputs and displays the stress value. By means of integral measuring, stress state of the hidden weld joint of the orthotropic steel bridge deck can be visually reflected, affection of the temperature on testing can be corrected effectively by the sensor and the temperature tester which are integrated, damage risk of the sensor is effectively reduced during construction, and test data are not affected by temperature and are more accurate.
Description
Technical field
The utility model belongs to the Steel Structure Weld technical field of measurement and test, particularly the hidden weld stress monitoring device of a kind of Orthotropic Steel Bridge Deck.
Background technology
China has become world's cable-stayed bridge and suspension bridge big country, Orthotropic Steel Bridge Deck is widely used in China's long-span bridge beam, follow the growth of this type of bridge military service phase and the magnitude of traffic flow, the steel bridge deck problem of fatigue damage highlights day by day under the complicated load cycle acts on repeatedly, through long-term operation, fatigue crack and damage in various degree appearred in domestic Orthotropic Steel Bridge Deck, and normal operation has caused significant damage to bridge.
There is more hidden weld seam in Orthotropic Steel Bridge Deck as a kind of prefabricate enclosed construction, is difficult to monitor and control with general means.In use, damage may appear in hidden weld seam, and these damages often have complicacy, disguise, the difficult characteristics such as property and consequence calamity of repairing, become the management of restriction steel bridge face structure and maintenance the difficult point problem it
Since the 1950's, the importance of bridge health monitoring just is familiar with gradually, but the restriction examined, that monitoring means is relatively backward does not obtain promoting and paying attention on using always.In recent years, complicated along with softization of long-span bridge beam and form and function, this technology becomes the industry research focus.Many countries have all built and have attempted and explore at the long span bridge beam of building at some, formed the multiple monitoring technology that is applicable to Steel Structure Weld stress, having comprised: x-ray method, supercritical ultrasonics technology, magnetic survey method, resistance are surveyed method, photoelastic method and optical fiber survey method etc.
X-ray method is traditional detection method, and the principle of diffraction takes place when it utilizes X ray penetrating metal lattice, the strain that measuring metallic materials or piece table surface layer produce owing to the spacing of lattice variation, thus calculate stress.Stress or unrelieved stress in the measurement member that x-ray method can can't harm are suitable for measuring the stress distribution of thin layer and crack tip especially.When measuring stress with X ray, its precision is subjected to the influence of many factors, as the smoothness on the measuring method of the wavelength of the selection of the meticulous deterioration high level of the structure of test specimen material, crystal grain, diffraction surfaces, X ray, employing, test specimen surface and disposition etc., only reach tens microns and fathom, and checkout equipment is complicated, the on-the-spot test inconvenience.
Supercritical ultrasonics technology is to measure the size of internal stress by the velocity of propagation of accurate measurement ultrasound wave in material.Be characterized in that Measuring Time is short, instrument is light, both can survey the stress on surface, can survey inner stress again, but the same with x-ray method, the factor that influences its measuring accuracy is more, and wherein the coupling between measurement mechanism and the test specimen is a major issue.
Ferrous materials magnetic force coupled stress detection method is exactly by measuring the variation of ferrous materials inside configuration magnetic characteristic, and size and the direction of utilizing the coupled relation measurement between itself and the stress to answer realize that non-contacting stress detects.But this method is at section form, size effect, the type of steels (as Q345, Q390, Q420 etc.) of different stresses, different component, and itself and stress are still sought the stage in research to the change rule of its magnetic characteristic.
Being the strain ga(u)ge mensuration, is most widely used general, the most perfect a kind of measuring method of development.E. Xi Mensi etc. (1938) has made first practical paper substrate filament winding formula strain ga(u)ge.P. Jackson's (nineteen fifty-three) utilizes photoetching technique, has made foil strain gauge first.C.S Smith (1954) finds the piezoresistive effect of semiconductor material, and W.P Mason (nineteen fifty-seven) etc. develops semiconductor strain gauge, and its sensitivity coefficient is higher more than 50 times than wire strain gauge.Its principle is to measure surface strain with strain ga(u)ge, again according to the relational expression of stress, strain, determines a kind of experiment analytical method of component surface stress state.Strain ga(u)ge is fixed on the tested member, and when surveying the deformation of member, the corresponding variation will take place in the resistance of strain ga(u)ge.With this changes in resistance of resistance strain-ga(u)ge measurement, through converting the just stress that can obtain measuring or strain.
Wear dimension. when Brest (1816) finds that clear glass is subjected to stress, have temporary birefrigent effect, for the development photoelastic method is laid a good foundation.Early in the twentieth century, you and L.N.G of E.G Cork takes human relations with the stress distribution of photoelastic method research bridge structure.Photoelastic method is exactly that the structural model that the transparent plastic with birefringence effect is made is placed polarized light field, when adding load to model, can see the interferogram that produces on the model, measure this interference fringe, by calculating, just can determine the stress state of structural model under the stand under load situation.Experimental technique with this optical principle research Elasticity Problems is called photoelastic method.Utilize photoelastic method, can study geometric configuration and the loading condition all stress distribution of the engineering component of more complicated, the particularly stress zone of concentrating and the problem of three-dimensional internal stress.
Fibre Optical Sensor be with light as the transmission of Information medium, light is as the sensor of information carrier.Since 20th century, the mid-1970s began Fibre Optical Sensor research, fiber optic sensor technology develops rapidly, has proved that Fibre Optical Sensor can be applicable to the measurement of displacement, vibration, strain, temperature, pressure, bending, speed, acceleration, electric current, rotation, magnetic field, voltage, flow, concentration etc. more or less a hundred physical quantity.These advantages are developed rapidly optical fiber Bragg raster.The development of optical fiber (Bragg) grating sensing technique is increasingly mature.Over nearly 20 years, the fiber-optic grating sensor technology is in field widespread uses such as aerospace, shipping industry, electric power, heavy construction, science of bridge building, nuclear industry, petrochemical industry, water conservancy, mining industry, municipal works, medical science.Yet because the Steel Structure Weld lateral dimension is less, and the surface should not polish and wait processing, therefore adopts optical fiber butt welded seam stress directly to monitor to exist certain difficult.
All there is the situation that in the installation process Steel Structure Weld structure structure is existed influence in the existing measurement means that comprises the above contact of foil gauge, and fragile in installation and later stage test process, the shortcoming that the reliability of test, permanance are not high.Prior art is not strong to the hidden weld stress monitoring of Orthotropic Steel Bridge Deck applicability, and sensor arrangement is simpler, do not consider that temperature is to sensor test result's influence, can be because variation of temperature causes than mistake the data test result, be difficult to satisfy the engineering test demand, do not have significant advantage.
The utility model content
The purpose of this utility model provides the hidden weld stress monitoring of a kind of Orthotropic Steel Bridge Deck, this device adopts the mode that does not contact weld seam to test the stress of the hidden weld seam of Orthotropic Steel Bridge Deck, can obtain the weld seam actual stress by the stress state around the test weld seam, avoid the problem that sensor butt welded seam structure itself exerts an influence in the present testing sensor installation process.
For achieving the above object, the utility model adopts following technical scheme:
The hidden weld stress monitoring device of a kind of Orthotropic Steel Bridge Deck comprises:
Data measurement module, comprise along the fibre optic strain sensor for the STRESS VARIATION data of measuring weld seam of the edge placement of Orthotropic Steel Bridge Deck U rib and decking attachment weld, be provided with in the described fibre optic strain sensor for the temperature tester of measuring the temperature value in weld seam and the described fibre optic strain sensor;
Data acquisition module is used for the pumping signal that the response data acquisition instructions is launched described data measurement module work, gathers the data-switching that described data measurement module records and becomes valid data;
Data processing module is used for sending described data acquisition instruction to described data acquisition module, receives the described valid data of described data acquisition module conversion, and stress value and the output of calculating described weld seam according to described valid data show.
Described fibre optic strain sensor comprises shell, fiber-optic signal transfer line, the Validity Test unit that is connected with described fiber-optic signal transfer line in described shell and the described temperature tester that places described Validity Test unit one side.
Described fiber-optic signal transfer line adopts shielding optical fiber.
Described data acquisition module comprises:
Collector is used for the described data acquisition instruction of response, is emitted to the signal excitation device after described acquisition instructions is handled, and the data that receive described data measurement module measurement are processed into valid data and are input to described data processing module;
The signal excitation device is emitted to described data measurement module for being back to described collector after the instruction process that receives described collector emission, excites described data measurement module.
Described collector comprises that master controller, being used for of being connected with described master controller carry out the induced signal device that data that computing becomes the calculated signals device of the described master controller of input behind the valid data and being used for of being connected with described calculated signals device to receive described data measurement module measurement are passed to described calculated signals device to described induced signal.
Described master controller comprises that central controller, being used for of being connected with described central controller carry out the valid data that described calculated signals device computing becomes can identify the signal converter of the described data processing module of conversion back input and the excitation controller that is used for the described signal excitation device of control.
Described signal excitation device comprises the grounding circuit of stimulated emission device, the signal output apparatus that is connected with described stimulated emission device, pumping signal storage converter, the cathode circuit that is connected with described pumping signal storage converter, control circuit and described stimulated emission device and pumping signal storage converter.
Described data processing module is a computing machine.
Described computing machine is portable computer.
Compared with prior art, the utlity model has following characteristics and beneficial effect:
The utility model provides proving installation for the concealed weld stress in the Orthotropic Steel Bridge Deck position that is difficult to know, by at the disguised weld seam arranged around of structure fibre optic strain sensor, can solve the problem that disguised weld stress is difficult to test; Because installing, fibre optic strain sensor do not contact weld seam, can effectively reduce sensor impaired risk in the construction of practical structures and use, and avoid sensor that the influence of butt welded seam structure is installed, compare existing contact strain meter, means of testing such as grating sensor, can effectively improve power of test and the serviceable life of fibre optic strain sensor, in addition, by at fibre optic strain sensor built-in temperature tester, the temperature in tested member (weld seam) and the fibre optic strain sensor is tested in data acquisition simultaneously, test result is carried out the temperature correction, effectively eliminate the tremendous influence that test result is subjected to temperature variation, guaranteed the accuracy of test data.
Description of drawings
Fig. 1 is the structural representation of the hidden weld stress monitoring device of Orthotropic Steel Bridge Deck that provides of the utility model embodiment;
Fig. 2 is the system chart of the hidden weld stress monitoring device of Orthotropic Steel Bridge Deck that provides of the utility model;
Fig. 3 is the structural representation of the signal excitation device that provides of the utility model embodiment;
Fig. 4 is the structural representation of the sensor that provides of the utility model embodiment;
Fig. 5 is the weld stress test data figure that the utility model embodiment provides;
Fig. 6 is the process flow diagram of the method for testing test section of the hidden weld stress monitoring device of Orthotropic Steel Bridge Deck that provides of the utility model embodiment;
Among the figure: 1-fibre optic strain sensor, 2-collector, 3-signal excitation device, 4-data processing module, 5-containment vessel, 6-cathode circuit, 7-control circuit, 8-grounding circuit, 9-signal output apparatus, 10-fiber-optic signal transfer line, 11-shell, 12-Validity Test unit, 13-temperature tester.
Embodiment
Below in conjunction with example substantive distinguishing features of the present invention and advantage are further described, but the present invention is not limited to listed embodiment.
The hidden weld stress monitoring device of Orthotropic Steel Bridge Deck described in the utility model mainly is to obtain weld stress by steel plate EXPERIMENTAL STRAIN-STRESS CONVERSION around the test Orthotropic Steel Bridge Deck weld seam.
Shown in Fig. 1 ~ 3, the hidden weld stress monitoring device of a kind of Orthotropic Steel Bridge Deck comprises:
Data measurement module, comprise along the fibre optic strain sensor for the STRESS VARIATION data of measuring weld seam of the edge placement of Orthotropic Steel Bridge Deck U rib and decking attachment weld, be provided with in the described fibre optic strain sensor for the temperature tester of measuring the temperature value in weld seam and the described fibre optic strain sensor;
Data acquisition module, signal input part is connected with the signal output part of described data measurement module, be used for the response data acquisition instructions and launch the pumping signal of described data measurement module work, gather the data-switching that described stress acquisition module records and become valid data;
Data processing module, signal input part is connected with the signal output part of described data acquisition module, be used for sending described data acquisition instruction to described data acquisition module, receive the described valid data of described data acquisition module conversion, stress value and the output of calculating described weld seam according to described valid data show.
Among the utility model embodiment, described data acquisition module passes through the order of the reception of 485 communication interfaces, response data processing module, and collection result is fed back to data processing module.
Referring to shown in Figure 4, described fibre optic strain sensor 1 comprises thin columniform shell 11, from described shell 11 double-end fiber-optic signal transfer lines 10, Validity Test unit 12 and temperature tester 13; Described Validity Test unit 12 is positioned at sensor 1 columniform shell 11 shaft core positions, 12 of shell 11 and Validity Test unit are fixed by the colloidal materials with certain intensity, described temperature tester 13 is built in the described sensor 1, described temperature tester 13 is right cylinder, is fixedly mounted on 12 sides, sensor 1 Validity Test unit by glue; Described fiber-optic signal transfer line 10 adopts the optical fiber shielding line, connects Validity Test unit 12 and the temperature tester 13 of sensor 1 inside, and is connected with data acquisition module.
During test, with the edge placement of described fibre optic strain sensor 1 along Orthotropic Steel Bridge Deck U rib and decking attachment weld, namely close on weld seam along the fusion length direction and distribute.
Shown in Fig. 1-2, among the utility model embodiment, described data acquisition module comprises:
Signal excitation device 3 is connected with described collector 2, is emitted to described data measurement module for being back to described collector 2 after the instruction process that receives described collector 2 emissions, excites described data measurement module.
Referring to shown in Figure 2, among the utility model embodiment, described collector 2 comprises that master controller, being used for of being connected with described master controller carry out the induced signal device that data that computing becomes the calculated signals device of the described master controller of input behind the valid data and being used for of being connected with described calculated signals device the described data measurement module of reception records are passed to described calculated signals device to described induced signal.
Referring to shown in Figure 2, described master controller comprises that central controller, being used for of being connected with described central controller carry out the excitation controller that can identify the signal converter of the described data processing module of conversion back input and be used for the described signal excitation device emission of control pumping signal with the valid data that described calculated signals device computing becomes.
Described signal excitation device 3 comprises stimulated emission device, the pumping signal storage converter that is connected with described stimulated emission device; Described stimulated emission device connects described signalling means, excitation controller respectively; Described pumping signal storage converter also is connected with described excitation controller.
Referring to shown in Figure 3, described signal excitation device 3 has a containment vessel 5, described stimulated emission device, pumping signal storage converter place described containment vessel 5, have cathode circuit 6, control circuit 7, grounding circuit 8 and signal output apparatus 9 for signal excitation; Described cathode circuit 6, control circuit 7 connect described signal and store storage converter, and described signal output apparatus 9 connects described stimulated emission device.Connect the stimulated emission device by cathode circuit 6, the stimulated emission device is connected with control circuit 7 with cathode circuit 6, and stimulated emission device and grounding circuit 8 connect into the loop.
Among the utility model embodiment, described data processing module be one be built-in with corresponding data processing equipment, the data of data collecting module collected can be carried out data analysis and handle, thereby obtain the stress value of described weld seam, and the computing machine 4 that shows.
More excellent, described computing machine 4 adopts portable computer.
During work, at first data processing module sends the data acquisition instruction to data acquisition module, master controller in the data acquisition module is launched pumping signal by collector to data measurement module by excitation controller control signal energizer, the Validity Test unit of the fibre optic strain sensor inside of data measurement module begins to experience weld stress and changes, the result is converted into induced signal by STRESS VARIATION, induced signal is turned back in the collector of data acquisition module, through the induced signal device of collector and calculated signals device the signal data of gathering is sent to master controller, the signal converter by master controller carries out being sent to data processing module after the signal conversion to be handled.
The hidden weld stress monitoring device of the described Orthotropic Steel Bridge Deck of the utility model embodiment, when fibre optic strain sensor was arranged in the measurement of weld seam next door, test joint edge stress intensity through converting, was converted into the weld stress size, and reduction formula is as follows:
In the formula,
Be the weld stress data that convert and obtain,
Be the sensor test data, K, C are the reduction formula that the data reduction that sensor obtains is become weld stress, and wherein, K is reduction coefficient, and C is conversion constant.
By the temperature that the temperature tester 13 in the fibre optic strain sensor is measured in weld seam and the fibre optic strain sensor, eliminate temperature to the influence of sensing data.The form of temperature correction formula is:
In the formula,
Temperature during for measurement,
Be the temperature of timing signal employing,
Be the image data correction increment under the accounting temperature,
Be temperature correction coefficient, carry out the temperature calibration test according to the feature of sensor and determine.
Referring to shown in Figure 6, according to above-mentioned principle, the concrete steps of the utility model test Orthotropic Steel Bridge Deck weld stress are as follows:
Step 1, demarcate testing sensor: sensor is installed in demarcates the test specimen surface, the stretch-draw test specimen according to test specimen actual stress and sensor return data situation, is set up the transducer calibration formula;
Step 3, test data: get final product the pick-up transducers data after the sensor installation, comprise sensor Validity Test cell data and temperature test data;
Step 4 is calculated the weld stress value, according to the sensor formula of demarcating, calculates and obtains the weld stress value.
Specific embodiment
According to step 1 ~ 3, collector for processing through data acquisition module, obtain the stress numerical 15.73MPa of sensor, 19.5 ℃ of temperature test values, the stress numerical of sensor is transferred to the formula that utilizes step 1 to obtain by data processing module in the data processing module, and calculating the weld stress value is 23.14MPa.In like manner, by a plurality of measuring points of a weld edge, gather calculating and obtained each measuring point stress 21.81MPa, 23.14MPa, 25.26MPa, 22.39MPa on the weld seam.
The utility model provides proving installation for the concealed weld stress in the Orthotropic Steel Bridge Deck position that is difficult to know, by at the disguised weld seam arranged around of structure fibre optic strain sensor, can solve the problem that disguised weld stress is difficult to test; Because installing, fibre optic strain sensor do not contact weld seam, can effectively reduce sensor impaired risk in the construction of practical structures and use, and avoid sensor that the influence of butt welded seam structure is installed, compare existing contact strain meter, means of testing such as grating sensor, can effectively improve power of test and the serviceable life of fibre optic strain sensor, in addition, by at fibre optic strain sensor built-in temperature tester, the temperature in tested member (weld seam) and the fibre optic strain sensor is tested in data acquisition simultaneously, test result is carried out the temperature correction, effectively eliminate the tremendous influence that test result is subjected to temperature variation, guaranteed the accuracy of test data.
Claims (9)
1. the hidden weld stress monitoring device of Orthotropic Steel Bridge Deck is characterized in that, comprising:
Data measurement module, comprise along the fibre optic strain sensor for the STRESS VARIATION data of measuring weld seam of the edge placement of Orthotropic Steel Bridge Deck U rib and decking attachment weld, be provided with in the described fibre optic strain sensor for the temperature tester of measuring the temperature value in weld seam and the described fibre optic strain sensor;
Data acquisition module is used for the pumping signal that the response data acquisition instructions is launched described data measurement module work, gathers the data-switching that described data measurement module records and becomes valid data;
Data processing module is used for sending described data acquisition instruction to described data acquisition module, receives the described valid data of described data acquisition module conversion, and stress value and the output of calculating described weld seam according to described valid data show.
2. according to the hidden weld stress monitoring device of the described Orthotropic Steel Bridge Deck of claim 1, it is characterized in that, described fibre optic strain sensor comprises shell, fiber-optic signal transfer line, the Validity Test unit that is connected with described fiber-optic signal transfer line in described shell and the described temperature tester that places described Validity Test unit one side.
3. according to the hidden weld stress monitoring device of the described Orthotropic Steel Bridge Deck of claim 2, it is characterized in that described fiber-optic signal transfer line adopts shielding optical fiber.
4. according to the hidden weld stress monitoring device of the described Orthotropic Steel Bridge Deck of claim 1, it is characterized in that described data acquisition module comprises:
Collector is used for the described data acquisition instruction of response, is emitted to the signal excitation device after described acquisition instructions is handled, and the induced signal that receives described data measurement module output is processed into valid data and is input to described data processing module;
The signal excitation device is emitted to described data measurement module for being back to described collector after the instruction process that receives described collector emission, excites described data measurement module.
5. according to the hidden weld stress monitoring device of the described Orthotropic Steel Bridge Deck of claim 4, it is characterized in that described collector comprises that master controller, being used for of being connected with described master controller carry out computing to described induced signal and become the calculated signals device of the described master controller of input behind the valid data and being used for of being connected with described calculated signals device to receive the induced signal device that described induced signal that described stress sensing module exports is passed to described calculated signals device.
6. according to the hidden weld stress monitoring device of the described Orthotropic Steel Bridge Deck of claim 5, it is characterized in that described master controller comprises that central controller, being used for of being connected with described central controller carry out the valid data that described calculated signals device computing becomes can identify the signal converter of the described data processing module of conversion back input and the excitation controller that is used for the described signal excitation device of control.
7. according to the hidden weld stress monitoring device of the described Orthotropic Steel Bridge Deck of claim 4, it is characterized in that described signal excitation device comprises the grounding circuit of stimulated emission device, the signal output apparatus that is connected with described stimulated emission device, pumping signal storage converter, the cathode circuit that is connected with described pumping signal storage converter, control circuit and described stimulated emission device and pumping signal storage converter.
8. according to the hidden weld stress monitoring device of the described Orthotropic Steel Bridge Deck of claim 1, it is characterized in that described data processing module is a computing machine.
9. the hidden weld stress monitoring device of described Orthotropic Steel Bridge Deck according to Claim 8 is characterized in that described computing machine is portable computer.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866695A (en) * | 2014-03-18 | 2014-06-18 | 中铁山桥集团有限公司 | Mechanical processing device for connecting part of U-shaped rib and transverse separation plate of orthotropic steel plate bridge deck plate |
| CN107632017A (en) * | 2017-08-15 | 2018-01-26 | 广东省特种设备检测研究院珠海检测院 | A kind of elevator T type guide rail joint detecting system and method |
| CN109839235A (en) * | 2017-11-24 | 2019-06-04 | 河北省机电一体化中试基地 | A kind of large size roller girth joint fatigue rupture on-line monitoring prior-warning device and method |
| CN110039218A (en) * | 2019-04-12 | 2019-07-23 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | A kind of regulating units welding point stress test system |
| CN110196121A (en) * | 2019-04-12 | 2019-09-03 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | A kind of regulating units welding point stress test method |
| CN110304195A (en) * | 2019-07-01 | 2019-10-08 | 上海外高桥造船有限公司 | The detection method and system of Structure stress |
| CN112229333A (en) * | 2020-09-30 | 2021-01-15 | 威海华菱光电股份有限公司 | Crack change monitoring device and method, storage medium and processor |
| CN112964296A (en) * | 2021-02-01 | 2021-06-15 | 中国长江电力股份有限公司 | Remote monitoring system for safety state of butt welding seam of ship lift |
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2013
- 2013-03-22 CN CN 201320133219 patent/CN203116893U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866695A (en) * | 2014-03-18 | 2014-06-18 | 中铁山桥集团有限公司 | Mechanical processing device for connecting part of U-shaped rib and transverse separation plate of orthotropic steel plate bridge deck plate |
| CN103866695B (en) * | 2014-03-18 | 2015-11-04 | 中铁山桥集团有限公司 | Orthotropic Steel Bridge Deck U rib and diaphragm junction machinery processing apparatus |
| CN107632017A (en) * | 2017-08-15 | 2018-01-26 | 广东省特种设备检测研究院珠海检测院 | A kind of elevator T type guide rail joint detecting system and method |
| CN107632017B (en) * | 2017-08-15 | 2023-08-15 | 广东省特种设备检测研究院珠海检测院 | Elevator T-shaped guide rail seam detection system and method |
| CN109839235A (en) * | 2017-11-24 | 2019-06-04 | 河北省机电一体化中试基地 | A kind of large size roller girth joint fatigue rupture on-line monitoring prior-warning device and method |
| CN109839235B (en) * | 2017-11-24 | 2021-04-27 | 河北省机电一体化中试基地 | Large-scale roller circumferential weld fatigue failure online monitoring and early warning device and method |
| CN110039218A (en) * | 2019-04-12 | 2019-07-23 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | A kind of regulating units welding point stress test system |
| CN110196121A (en) * | 2019-04-12 | 2019-09-03 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | A kind of regulating units welding point stress test method |
| CN110304195A (en) * | 2019-07-01 | 2019-10-08 | 上海外高桥造船有限公司 | The detection method and system of Structure stress |
| CN112229333A (en) * | 2020-09-30 | 2021-01-15 | 威海华菱光电股份有限公司 | Crack change monitoring device and method, storage medium and processor |
| CN112964296A (en) * | 2021-02-01 | 2021-06-15 | 中国长江电力股份有限公司 | Remote monitoring system for safety state of butt welding seam of ship lift |
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