CN103091182A - Biaxial-creep-instrument-based acquisition and measurement system - Google Patents
Biaxial-creep-instrument-based acquisition and measurement system Download PDFInfo
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- CN103091182A CN103091182A CN2013100368358A CN201310036835A CN103091182A CN 103091182 A CN103091182 A CN 103091182A CN 2013100368358 A CN2013100368358 A CN 2013100368358A CN 201310036835 A CN201310036835 A CN 201310036835A CN 103091182 A CN103091182 A CN 103091182A
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Abstract
The invention discloses a biaxial-creep-instrument-based acquisition and measurement system. A load sensor, a displacement sensor and a deformation sensor are arranged on a biaxial creep instrument; and the system is characterized in that each sensor is connected with transverse and longitudinal controllers; the data point of each acquisition channel is transmitted to the acquisition and measurement system of a computer in real time through a network connection mode; the acquisition and measurement system and the controllers form a control mechanism to realize load control, deformation control and displacement control; and the acquisition and measurement system performs calculation, image display, storage and analysis on the received data point. High technical level measurement on the rock materials and concrete materials is realized, the system is easy to mount and debug, operation with infinitely long time is realized, manual recording is not required, and data networking and easy management are realized. The defects that the workload is high, the efficiency is low and the data cannot be managed in the prior art are overcome, so that the construction stress and strain state change can be accurately mastered through scientific research analysis, and effective basis is provided for material manufacturing and application.
Description
Technical field
The present invention is special a kind of load to material, displacement, distortion collecting and measuring system, and this system is used for measuring rock material, the engineering stress of concrete material, strain, is mainly used in engineering analysis and the application of material.
Background technology
Creep Apparatus is the equipment of long-term constant load that test specimen is applied, the spring mechanical formula Creep Apparatus that adopt more, the loading ability is unusual less than 250 ~ 300kN, and the loading mode is lifting jack and proving ring loading manually, loading process is wasted time and energy, and rate of loading should not be controlled; When load reaches predetermined value, be about to load and fix, namely with pipe vice, the set nut of spring Creep Apparatus is wrenched.After the test specimen load-bearing, front close rear the dredging of read time surveyed in strain, during from loading in a week every day survey once, surveyed once weekly in one month after the week, after one month, survey is once per month in 1 year.The observation time of general sealed test piece approximately 200 ~ 300 days, the observation time of non-tight test specimen need more than 2 years.Observe again 1 ~ 2 month after off-load, in order to determine concrete retarded elasticity.In long-term process of the test, due to needs personnel time sight, record, workload is large, has expended a large amount of manpower and materials, has wasted a large amount of time.And after the test specimen load-bearing, cause stress relaxation because producing compression deformation (creeping),, also namely need not timing, carry out the manual synchronizing payload values frequently, time-consuming, effort that load is proofreaied and correct greater than approximately transferring lotus 2% the time when loads change.When loading value error was larger, the measurement point error amount of each distortion was also larger, calculated the resultant error of creeping also larger, and therefore existing manual measurement means are difficult to practical requirement.
In recent years, along with the development of science and technology, to use across the construction of footpath prestress high intensity concrete beam bridge greatly, the span centre downwarp in operation of beam bridge girder is a comparatively universal phenomenon, bridge usability and structural safety are had a negative impact, become the serious hindrance of this type of bridge development.Present both at home and abroad the causing greatly principal element across footpath prestressed concrete beam bridge downwarp that concrete creep is arranged, disadvantageously become bridge stress state and construction quality to what the prestress long-term loss estimated that on the low side, concrete cracking and construction method cause of approval relatively.Concrete shrinkage and creep has very large uncertainty, is the large major obstacle across footpath prestressed concrete beam bridge Long-term Deflection forecasting accuracy of impact.
For the bidirectional stress situation of simulation concrete beam slab, the scientific research personnel has developed the concrete biaxial Creep Apparatus, is used for the Creep Characteristics of research concrete sample under twin shaft or single shaft load long duration of action, measures the mechanical property of its long term creep strain.
The Practical Project material generally adopts high-strength concrete, thereby the loading value during creep test is larger, and traditional spring mechanical formula Creep Apparatus can not satisfy testing requirements.The concrete biaxial Creep Apparatus adopts electromechanical coupling system to load in the sample horizontal axis, and servo apply hydraulic pressure mechanism loads in the sample vertical axis.
Summary of the invention
In order to overcome the larger problem of data collection task amount of above-mentioned deficiency and twin shaft creep test, it is a kind of based on the creep collecting and measuring system of instrument of twin shaft that the present patent application will provide, make the testing crew of test mechanism can be by to the setting of computer-automatic collection, realize obtaining regularly, exactly its each measure the stress-strain data of passage and the out of Memory of control, thereby provide foundation for the data analysis in later stage.
the technical solution adopted in the present invention is: a kind of based on the creep collecting and measuring system of instrument of twin shaft, install on the test main frame and vertically measure load sensor, the cross measure load sensor, vertically measure displacement transducer, the cross measure displacement transducer, vertically measure deformation-sensor, the cross measure deformation-sensor, test specimen is arranged on the test main frame, its four moulding sides are the face of exerting pressure, contact to pressing plate with the twin shaft of testing machine, moulding upper, each deformation-sensor is installed on lower two sides, it is characterized in that
Described collecting and measuring system comprises data-signal acquisition terminal, data transmission unit, and gathers three part compositions of measuring unit;
Described vertical measurement load sensor, vertically measure displacement transducer, vertically measure deformation-sensor and be connected with longitudinal controller respectively; Described cross measure load sensor, cross measure displacement transducer, cross measure deformation-sensor are connected with Lateral Controller respectively; Form the data-signal acquisition terminal; It is an independently embedded signal acquisition system;
After described longitudinal controller and Lateral Controller carry out other processing of A/D conversion and signal to each access signal respectively, give serial server data upload, serial server is given switch data upload again, switch finally is equipped with data upload in the computing machine of collecting and measuring system, above composition data transmission unit;
Described collection measuring unit is installed on computers.
In above technical scheme, described vertical measurement load sensor, cross measure load sensor, vertically measure displacement transducer, cross measure displacement transducer, vertically measure deformation-sensor, the cross measure deformation-sensor is arranged on respectively on the test main frame and/or on sample.
Described vertical measurement load sensor, cross measure load sensor, vertically measure displacement transducer, cross measure displacement transducer, vertically measure deformation-sensor, cross measure deformation-sensor respectively by load sensing module, distortion sensing module, displacement sensing module composition.
Be provided with power transfer module in described collecting and measuring system, and provide various voltages by this power transfer module for the digital circuit in collecting and measuring system and mimic channel.
More particularly, the present invention is based on the creep collecting and measuring system of instrument of twin shaft and comprises that data-signal (load, becomes
Shape, displacement, controller) acquisition terminal, data transmission unit (serial server, switch), collecting and measuring system are three
Part.
The data-signal acquisition terminal is arranged on the test main frame, on sample, on switch board, and the compositions such as power transfer module, load sensing module, distortion sensing module, displacement sensing module, control system module are independently embedded signal acquisition systems.Provide various voltages by power transfer module for digital circuit and mimic channel, (control accuracy is high, and long-time stability is good for the control system module; Dynamometry and survey distortion resolution high (24), and inside and outside not stepping, omnidistance resolution is constant, and the user can set up on their own according to the test needs; Have the functions such as automatic zero set (AZS), automatic Calibration; Have overload, over travel, overvoltage, overcurrent, the defencive function such as overheated; Has the open type data joining interface, can realize the closed-loop controls such as load, distortion, displacement, speed, control permanent load, permanent distortion, permanent displacement, even rate of stressing, homogeneous strain speed, constant speed in the multi-step mode, between rear three kinds of modes, nothing is impacted conversion in process of the test; ), the control system module is the nucleus module of acquisition terminal, the signal of each sensing module (conversion, filtering, amplification, calculating, storage, control, output), is uploaded to data transmission unit.
Data transmission unit is selected serial ports and the network interface communications platform of mature and reliable, and transmission is stable, and the characteristics such as antijamming capability is strong, and the test figure point that the handle of safety receives is uploaded to collecting and measuring system.
Collecting and measuring system is arranged on the computing machine of a high configuration, by network interface acceptance test data point, collecting and measuring system is comprised of software interface display module, control module, status information display part, systematic parameter module, analysis module, information database etc., adopts the C/S architecture design.interface display module comprises two parts, the one, the passage display part, the curve display part, the passage display part is to be shown on the main interface of Testing Software after the test figure of coming is processed receiving in real time, and shown differentiation with different colors, displaying contents is longitudinal load, a plurality of linear deformations, length travel, lateral load, a plurality of transversely deformings, transversal displacement, a plurality of linear deformations of non-load, a plurality of transversely deformings of non-load, the curve display part is the data that reception is come to be depicted with the form of curve spectrum seem more directly perceived, be more convenient for judging and analyzing.Control module is to send according to demand to control parameter and parameter and arrange and wait instruction to acquisition terminal, and all loadings and unloading all have the control module realization.The status information display part is that each state of current collecting and measuring system and the state of acquisition terminal are shown.The systematic parameter module is management and the unit of implementing the collecting and measuring system core parameter, gather setting, the calibration coefficient of clock setting,
The setting of pid parameter, the setting of rights management, intranet data upload setting, etc. some major parameters.Analysis module is that the result data after off-test is analyzed again, mainly comprises the derivation (export to Excel, export to Word) of printing, result data and the data point of the recomputating of test findings data, result data, detailed inquiry and statistical function.Information database is used for storing information and the other system information of all test figure points.
The invention has the beneficial effects as follows, the specialized means of a kind of full automatic high precision have been realized, possess that Installation and Debugging are simple, the work of time endless, need not the characteristics such as manual record, data network manageability, overcome Traditional Man and controlled the shortcoming that the acquisition mode workload is large, efficient is low, data can't be managed, the scientific research analysis is grasped more accurately to the state variation of the stress in engineering, strain, provided strong foundation to the Manufacture and application of material.
Description of drawings
Fig. 1 is the system architecture schematic diagram.
Fig. 2 is collecting and measuring system end structure figure.
In Fig. 1, system comprises following 11 parts: data-signal acquisition terminal, data transmission unit, collecting and measuring system.
In Fig. 2, collecting and measuring system specifically comprises following four parts: data transmit-receive module, data input module, market demand module, warning polling module, information data library module, control system module, analysis module, output module, print module, roll back module.
Embodiment
Embodiment 1, based on the creep collecting and measuring system of instrument of twin shaft, with reference to Fig. 1, Fig. 2: comprise data-signal (load, distortion, displacement, controller) acquisition terminal, data transmission unit (serial server, switch), three parts of collecting and measuring system.
The data-signal acquisition terminal is arranged on the test main frame, on sample, on switch board, and the compositions such as power transfer module, load sensing module, distortion sensing module, displacement sensing module, control system module are independently embedded signal acquisition systems.Provide various voltages by power transfer module for digital circuit and mimic channel, (control accuracy is high, and long-time stability is good for the control system module; Dynamometry and survey distortion resolution high (24), and inside and outside not stepping, omnidistance resolution is constant, and the user can set up on their own according to the test needs; Have the functions such as automatic zero set (AZS), automatic Calibration; Have overload, over travel, overvoltage, overcurrent, the defencive function such as overheated; Has the open type data joining interface, can realize the closed-loop controls such as load, distortion, displacement, speed, control permanent load, permanent distortion, permanent displacement, even rate of stressing, homogeneous strain speed, constant speed in the multi-step mode, between rear three kinds of modes, nothing is impacted conversion in process of the test; ), the control system module is the nucleus module of acquisition terminal, the signal of each sensing module (conversion, filtering, amplification, calculating, storage, control, output), is uploaded to data transmission unit.
Claims (8)
1. collecting and measuring system based on the twin shaft Creep Apparatus, install on the test main frame vertically measure load sensor, cross measure load sensor, vertically measure displacement transducer, cross measure displacement transducer, vertically measure deformation-sensor, cross measure deformation-sensor, test specimen is arranged on the test main frame, its four moulding sides are the face of exerting pressure, contact to pressing plate with the twin shaft of testing machine, the upper and lower faces of moulding is installed each deformation-sensor, it is characterized in that
Described collecting and measuring system comprises data-signal acquisition terminal, data transmission unit, and gathers three part compositions of measuring unit;
Described vertical measurement load sensor, vertically measure displacement transducer, vertically measure deformation-sensor and be connected with longitudinal controller respectively; Described cross measure load sensor, cross measure displacement transducer, cross measure deformation-sensor are connected with Lateral Controller respectively; Form the data-signal acquisition terminal;
After described longitudinal controller and Lateral Controller carry out the A/D conversion to each access signal respectively, give serial server data upload, serial server is given switch data upload again, switch finally is equipped with data upload in the computing machine of collecting and measuring system, above composition data transmission unit;
Described collection measuring unit is installed on computers.
2. according to claim 1 based on the creep collecting and measuring system of instrument of twin shaft, it is characterized in that, described vertical measurement load sensor, cross measure load sensor, vertically measure displacement transducer, cross measure displacement transducer, vertically measure deformation-sensor, the cross measure deformation-sensor is arranged on respectively on the test main frame and/or on sample.
3. according to claim 2 based on the creep collecting and measuring system of instrument of twin shaft, it is characterized in that described data-signal acquisition terminal; It is an independently embedded signal acquisition system.
4. according to claim 1 based on the creep collecting and measuring system of instrument of twin shaft, it is characterized in that, described vertical measurement load sensor, cross measure load sensor, vertically measure displacement transducer, cross measure displacement transducer, vertically measure deformation-sensor, cross measure deformation-sensor respectively by load sensing module, distortion sensing module, displacement sensing module composition.
5. according to claim 1 based on the creep collecting and measuring system of instrument of twin shaft, it is characterized in that, be provided with power transfer module in described collecting and measuring system, and provide various voltages by this power transfer module for the digital circuit in collecting and measuring system and mimic channel.
6. according to claim 1 based on the creep collecting and measuring system of instrument of twin shaft, it is characterized in that, be provided with the control system module in described collecting and measuring system, the control system module is the nucleus module of acquisition terminal, and the signal of each sensing module is uploaded to described data transmission unit; And by this control system module realize load, distortion, displacement, speed etc. closed-loop control.
7. according to claim 1ly it is characterized in that based on the creep collecting and measuring system of instrument of twin shaft, described data transmission unit is selected serial ports and network interface communications platform, and the test figure point that receives is uploaded to collecting and measuring system.
8. one of according to claim 1-7 described based on the creep collecting and measuring system of instrument of twin shaft, it is characterized in that, the computing machine of described collecting and measuring system, by network interface acceptance test data point, collecting and measuring system is comprised of software interface display module, control module, status information display part, systematic parameter module, analysis module, information database, adopts the C/S architecture design.
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Cited By (3)
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| CN107084695A (en) * | 2017-06-05 | 2017-08-22 | 国家电网公司 | A kind of Full-automatic cement electric pole mechanics deflection check-up device and method |
| CN107256489A (en) * | 2017-06-08 | 2017-10-17 | 曹孝忠 | Stone material Internet of Things cell phone and its management method |
| CN108492659A (en) * | 2018-03-30 | 2018-09-04 | 河南德瑞普测绘仪器有限公司 | A kind of interior measurement of the level intelligent training system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20130508 |