CN102621008B - Fully automatic strain control type direct shear test instrument and purpose thereof - Google Patents
Fully automatic strain control type direct shear test instrument and purpose thereof Download PDFInfo
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- CN102621008B CN102621008B CN201210064583.5A CN201210064583A CN102621008B CN 102621008 B CN102621008 B CN 102621008B CN 201210064583 A CN201210064583 A CN 201210064583A CN 102621008 B CN102621008 B CN 102621008B
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Abstract
The invention discloses a fully automatic strain control type direct shear test instrument, which comprises a computer, a data collection controller, a force measurement sensor, a direct shear instrument, a pressurizing device, data connecting wires and a pressure pipeline, wherein the data collection controller is connected with the pressurizing device through the pressure pipeline and is connected with the computer, the force measurement sensor and the direct shear instrument through the data connecting wires, and the force measurement sensor is connected with the direct shear instrument through the data connecting wire. The fully automatic strain control type direct shear test instrument disclosed by the invention has the advantages that the automatic control of the processes such as data collection, load loading and unloading, shearing strain control, prepressing, shearing, instrument initial state recovery after test completion and the like is realized, the rock shearing detection steps are specified by the fully automatic strain control type direct shear test instrument, the work intensity of test personnel is lightened, and the test work efficiency is improved; and meanwhile, 3200 Kpa of vertical load can be applied to the maximum degree, and the use requirements of the deep rock foundation engineering are met.
Description
Technical field
The present invention relates to a kind of staight scissors testing tool, relate in particular to a kind of full-automatic strain and control formula staight scissors testing tool.
Background technology
Ground test is one of most important link in geotechnical investigation work, wherein the shearing strength of ground is one of important mechanical property of ground, evaluating foundation bearing capacity and ground, chamber, when foundation ditch is stable and retaining wall pressure etc. calculates, all to use the Shear Strength Index of ground, therefore, the shearing strength of rapid and accurate determination ground is significant in engineering practice.
The method of existing indoor test ground shearing strength and instrument have a lot, wherein direct shear tester, simple structure clear and definite with its principle, the advantage such as easy to operate and be able to widespread use in engineering, controlled testing automatically but all can not realize in operation instrument.Such as: the loaded down with trivial details work such as loading, off-load, shearing beginning and end, shear strain control, record data, need manual control operation.And manual control operation requirements testing staff quality is very high, and inefficiency, and labour intensity is large.In addition, existing direct shear apparatus due to adopt counterweight manually add off-load and instrument design itself limit, vertical load maximum during shearing test is no more than 400Kpa, can not meet the test needs of deep layer hard paste.
Summary of the invention
Defect for prior art, the invention discloses a kind of full-automatic strain-type staight scissors testing tool for indoor fast detecting ground shearing strength, realized data acquisition, added and unload the robotization that loading, shear strain control, precompressed, shearing, test finish the processes such as rear recovery instrument original state and control, each process of test all can be moved by automatic transfer continuously, without manual intervention, control, full-automatic strain-type boxshear apparatus standard ground shear detecting step, alleviated tester labour intensity, improved test job efficiency.Instrument adopts air pressure or hydraulic cylinder to carry out loading simultaneously, and maximum can apply the vertical load of 3200Kpa, has met the use needs of dark Rock soil Foundation engineering.
For achieving the above object, the present invention is achieved through the following technical solutions:
Formula staight scissors testing tool is controlled in full-automatic strain, comprise computing machine, data acquisition controller, force cell, direct shear apparatus, pressue device, data connecting line and pressure piping, wherein said data acquisition controller is connected with pressue device by pressure piping, described data acquisition controller is connected with computing machine, force cell, direct shear apparatus by data connecting line, and described force cell is arranged on direct shear apparatus.
Wherein, described computing machine is mounted with functional module, for the information such as basic engineering information, method of testing, loading standard, precompressed duration of acquisition controller relevant control parameter and staight scissors test are set; Described data acquisition controller is for monitoring, record and transmitting force cell output valve, regulation and control pressure source to the speed of set pressure, control shear strain and the work order of direction and transmitting-receiving computer function module etc.; Described force cell, for converting the shearing strength of ground sample to electric signal, is processed for acquisition controller; Described direct shear apparatus, as the container of ground sample with as the topworks of acquisition controller, works in whole testing tool; Described pressue device is used to whole instrument that basic pressure is provided, and through acquisition controller, regulate to process and after-appliedly in power cylinder, finally to act on test ground sample; Described data connecting line and pressure piping be for each parts of instrument are connected, and for the data collection and control of instrument adds off-load, provides passage.
By above-mentioned improvement, full-automatic strain of the present invention is controlled formula staight scissors testing tool and has been realized the full-automation that detects the operation of ground shearing strength, reduced user of service's labour intensity, and avoided, due to the issuable operate miss of operator's long period of operation or error, having improved the reliability of work efficiency and test result.
Wherein, described functional module comprises data acquisition controller control module, for controlling the correlation parameter of data acquisition controller, comprise sensor calibration parameter, instrument configuration parameter, servomotor control parameter, the cylinder gravity pressure of exerting oneself, passage power factor, reduction gear speed ratio, add off-load control parameter etc.; Staight scissors tests basic parameter module, for the engineering name of management testing, job number, ground sample number into spectrum, method of testing, precompressed duration, pressure at right angle etc.; Data acquisition controller control command module, for generation of starting, acquisition controller, initialization, sensor make zero, test beginnings, preserve test data, transmission test parameter, process finish, data field checks, the order such as initialization by force; Test mode tracking module, for showing force cell data, data acquisition controller current state, test process information, dynamic drafting test curve etc.; Data processing module, for processing the test data of having preserved, analyze, choice, original shearing strength curve, adjustment, preview, Data Format Transform etc.
Wherein, described data acquisition controller is mounted with kernel module, for automatically performing whole test process after shutting down computer; Data-switching acquisition module; Power-off protection test mode module; Servomotor control module etc.
Wherein, described direct shear apparatus has carried out effective architecture advances and function innovation with respect to existing direct shear apparatus, on the basis of existing direct shear apparatus, also comprises with lower device: the liquid gas pressure cylinder of exerting oneself, act on ground sample, and ground sample is applied to pressure at right angle; Servomotor, accurately controls shear rate and shear displacemant; Reducing gear, the stationarity of exerting oneself with shear displacemant for increasing servomotor; Cylinder balancing device, for the deadweight zeroing when the original state of the cylinder of different size; Protective device, comprises displacement position-limiting device and force cell protective device.
In the present invention, described pressue device is pneumatic supply or hydraulic power source, adopts it to carry out loading, and maximum can apply the vertical load of 3200Kpa, meet the use needs of dark Rock soil Foundation engineering, overcome traditional defect that direct shear apparatus vertical load is little, range of application is restricted.
In the present invention, described direct shear apparatus is not subject to special restriction, can be single channel direct shear apparatus or the novel direct shear apparatus of hyperchannel.
Formula staight scissors testing tool is controlled in full-automatic strain of the present invention, and specific to having multiple combination form in structure, described data acquisition controller can connect separate unit direct shear apparatus or connect many direct shear apparatuses.
Formula staight scissors test instrument system is controlled in full-automatic strain of the present invention, and to add the off-load ratio of exerting oneself can be also can be at 1: 1 the various ways such as 1: 2,1: 3,1: 4; Add off-load control can be configured to automatically add, off-load or artificial adjust add, off-load, the different unloading ways that add can configure identical shear strain and control; Force cell can be traditional loop type of measuring one's own ability, and can be also force cell or transmitter, and output signal can be that digital signal can be also simulating signal;
On the basis of the above, the invention discloses the purposes that formula staight scissors testing tool Fast Measurement ground sample Shear Strength Index under different pressures in ground test is controlled in described full-automatic strain, concrete comprises the steps:
1) computer terminal arranges the correlation parameter of staight scissors tests, mainly comprises instrument information, test sample message, method of testing, pressure at right angle, shear rate, cuts the information such as off-position moves and be sent to data acquisition controller;
2) computer terminal sends test sign on;
3) data acquisition unit is by the test parameter setting in advance, and automatically carries out instrument adjustment, loading, precompressed, starts shearing, the operation such as record data, test finish differentiation, off-load, instrument reset, prompting test end;
4) test data unloading is to computer terminal, the operation such as carry out data-switching, processing, analyze, gather.
By said structure, operations improvement, full-automatic strain of the present invention is controlled formula staight scissors testing tool and has been realized electric transmission, the combination utilization of control automatically, machine-building, sensor technology, by the advantage of comprehensive correlation technique, can be used in indoor fast detecting ground shearing strength, not only can rapid and accurate determination, and realized the robotization of test process, improve work efficiency, improved the reliability of test result, and effectively expanded range of application.
Accompanying drawing explanation
Fig. 1 is the one-piece construction connection diagram that formula staight scissors testing tool is controlled in the full-automatic strain of the present invention;
Fig. 2 is the computer function module frame figure that formula staight scissors testing tool is controlled in the full-automatic strain of the present invention;
Fig. 3 is the data acquisition controller functional framework figure that formula staight scissors testing tool is controlled in the full-automatic strain of the present invention;
Fig. 4 is the direct shear apparatus structural representation that formula staight scissors testing tool is controlled in the full-automatic strain of the present invention.
Embodiment
The invention essence that the present invention may be better understood by reference to the accompanying drawings; a kind of preferred enforcement that following enforcement and accompanying drawing are only realized for the present invention; be not limited only to the present invention and realize by following manner, many equivalent variations such as the change that those skilled in the art carry out on the basis of understanding the technology of the present invention essence, replacement still belong to protection scope of the present invention.
It should be noted that; in the concrete enforcement of technical scheme of the present invention; implementation method for the functional module loading on each parts can adopt any available method of computer realm to realize; such as writing software programming language used, include but not limited to any conventional programming languages such as VB, VC, C#; this is that those skilled in the art are apparent according to knowing a hawk from a handsaw, and this kind of variation belongs to protection scope of the present invention.
With reference to figure 1, one-piece construction for the full-automatic strain control of the present invention formula staight scissors testing tool, comprise computing machine, data acquisition controller, force cell, direct shear apparatus, pressue device, data connecting line and pressure piping, wherein data acquisition controller is connected with direct shear apparatus with pressue device by pressure piping, data acquisition controller is connected with computing machine, force cell, direct shear apparatus by data connecting line, force cell is arranged on direct shear apparatus, and pressue device is liquid or gas pressure source.
Concrete connected mode is: information wire connection data acquisition controller, computing machine and direct shear apparatus, at computer terminal, by functional module, controlled; Liquid, atmospheric pressure source are connected to data acquisition controller by pressure pipeline, carry out preset pressure adjusting, then send into liquid, the atmospheric pressure cylinder of direct shear apparatus, test ground sample is added to off-load and control; Force cell is connected on acquisition controller by signal wire, measures ground sample Shear Strength Index, and wherein force cell is fixed on direct shear apparatus, and dynamometry end contacts with ground sample shear box; The functions such as strain control, shear rate are controlled by data acquisition controller, are connected in the corresponding execution architecture of novel direct shear apparatus by control line.
With reference to figure 2, the functional module of loading for computing machine, comprise data acquisition controller control module, for controlling the correlation parameter of data acquisition controller, comprise sensor calibration parameter, instrument configuration parameter, servomotor control parameter, the cylinder gravity pressure of exerting oneself, passage power factor, reduction gear speed ratio, add off-load control parameter etc.; Staight scissors tests basic parameter module, for the engineering name of management testing, job number, ground sample number into spectrum, method of testing, precompressed duration, pressure at right angle etc.; Data acquisition controller control command module, for generation of starting, acquisition controller, initialization, sensor make zero, test beginnings, preserve test data, transmission test parameter, process finish, data field checks, the order such as initialization by force; Test mode tracking module, for showing force cell data, data acquisition controller current state, test process information, dynamic drafting test curve etc.; Data processing module, for processing the test data of having preserved, analyze, choice, original shearing strength curve, adjustment, preview, Data Format Transform etc.
With reference to figure 3, data acquisition controller is mounted with kernel module, for automatically performing whole test process after shutting down computer; Data-switching acquisition module; Power-off protection test mode module; Servomotor control module, acts on data acquisition, adds to unload loading, shear strain control, precompressed, shearing, test and each stage of test process such as after finishing, restPose.
With reference to figure 4, the present invention's direct shear apparatus used has been removed existing direct shear apparatus weight adding part, air pressure or hydraulic pressure exert oneself cylinder, servomotor and reduction gear have been increased, not only the container as ground sample uses, and as the topworks of whole data acquisition controller, work in whole testing tool, comprise following part:
(1) the liquid gas pressure cylinder of exerting oneself, acts on ground sample, and ground sample is applied to vertical load.
(2) servomotor, accurately controls shear rate and shear displacemant.
(3) reducing gear, the stationarity of exerting oneself with shear displacemant for increasing servomotor.
(4) cylinder balancing device, for the deadweight zeroing when the original state of the cylinder of different size.
(5) protective device, comprises displacement position-limiting device and force cell protective device.
Claims (8)
1. formula staight scissors testing tool is controlled in full-automatic strain, comprise computing machine, data acquisition controller, force cell, direct shear apparatus, pressue device, data connecting line and pressure piping, wherein said data acquisition controller is connected with direct shear apparatus with pressue device by pressure piping, described data acquisition controller is connected with computing machine, force cell, direct shear apparatus by data connecting line, and described force cell is arranged on direct shear apparatus; Wherein, described pressue device is air pressure or hydraulic power source; Described direct shear apparatus comprises with lower device: the liquid gas pressure cylinder of exerting oneself, act on ground sample, and ground sample is applied to pressure at right angle; Servomotor, accurately controls shear rate and shear displacemant; Reducing gear, the stationarity of exerting oneself with shear displacemant for increasing servomotor; Cylinder balancing device, for the deadweight zeroing when the original state of the cylinder of different size; Protective device, comprises displacement position-limiting device and force cell protective device.
2. formula staight scissors testing tool is controlled in full-automatic strain according to claim 1, it is characterized in that described computing machine is mounted with functional module, for the information such as basic engineering information, method of testing, loading standard, precompressed duration of acquisition controller relevant control parameter and staight scissors test are set; Described data acquisition controller is for monitoring, record and transmitting force cell output valve, regulation and control pressure source to the speed of set pressure, control shear strain and the work order of direction and transmitting-receiving computer function module etc.; Described force cell, for converting the shearing strength of ground sample to electric signal, is processed for acquisition controller; Described direct shear apparatus, as the container of ground sample with as the topworks of data acquisition controller, works in whole testing tool; Described pressue device is used to whole instrument that basic pressure is provided, and through data acquisition controller, regulate to process and after-appliedly in power cylinder, finally to act on test ground sample; Described data connecting line and pressure piping be for each parts of instrument are connected, and for the data collection and control of instrument adds off-load, provides passage.
3. formula staight scissors testing tool is controlled in full-automatic strain according to claim 2, it is characterized in that described functional module comprises data acquisition controller control module, for controlling the correlation parameter of data acquisition controller, comprise sensor calibration parameter, instrument configuration parameter, servomotor control parameter, the cylinder gravity pressure of exerting oneself, passage power factor, reduction gear speed ratio, add off-load control parameter etc.; Staight scissors tests basic parameter module, for the engineering name of management testing, job number, ground sample number into spectrum, method of testing, precompressed duration, pressure at right angle etc.; Data acquisition controller control command module, for generation of starting, acquisition controller, initialization, sensor make zero, test beginnings, preserve test data, send test parameter, process finishes, data field checks, initialization by force, receive and dispatch the orders such as detection information; Test mode tracking module, for showing force cell data, data acquisition controller current state, test process information, dynamic drafting test curve etc.; Data processing module, for processing the test data of having preserved, analyze, choice, original shearing strength curve, adjustment, preview, Data Format Transform etc.
4. formula staight scissors testing tool is controlled in full-automatic strain according to claim 1, it is characterized in that described data acquisition controller is mounted with kernel module, for automatically performing whole test process after shutting down computer; Data-switching acquisition module; Power-off protection test mode module; Servomotor control module.
5. formula staight scissors testing tool is controlled in full-automatic strain according to claim 1, it is characterized in that direct shear apparatus is single channel direct shear apparatus or the novel direct shear apparatus of hyperchannel.
6. formula staight scissors testing tool is controlled in full-automatic strain according to claim 5, it is characterized in that described data acquisition controller connects separate unit direct shear apparatus or connects many direct shear apparatuses.
7. the purposes of formula staight scissors testing tool Fast Measurement ground sample Shear Strength Index under different pressures in ground test is controlled in the full-automatic strain described in above-mentioned arbitrary claim.
8. purposes according to claim 7, comprises the steps:
1) computer terminal arranges the correlation parameter of staight scissors tests, mainly comprises instrument information, test sample message, method of testing, pressure at right angle, shear rate, cuts the information such as off-position moves and be sent to data acquisition controller;
2) computer terminal sends test sign on;
3) data acquisition unit is by the test parameter setting in advance, and automatically carries out instrument adjustment, loading, precompressed, starts shearing, the operation such as record data, test finish differentiation, off-load, instrument reset, prompting test end;
4) test data unloading is to computer terminal, the operation such as carry out data-switching, processing, analyze, gather.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103149066A (en) * | 2013-02-27 | 2013-06-12 | 浙江土工仪器制造有限公司 | Direct shearing and prepressing instrument |
| CN107607387A (en) * | 2017-09-15 | 2018-01-19 | 中航勘察设计研究院有限公司 | A kind of continuous loading consolidation apparatus of strain controlling for being used to test soil body compressible index |
| CN108345256A (en) * | 2018-05-10 | 2018-07-31 | 中铁第四勘察设计院集团有限公司 | A kind of drilling shear test data automatic collection control system |
| CN109085050A (en) * | 2018-07-16 | 2018-12-25 | 昆明理工大学 | A kind of Stress Control formula direct shear apparatus |
| CN110844114B (en) * | 2019-10-15 | 2023-04-14 | 中国特种飞行器研究所 | Portable aerostat test system |
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| CN101105433A (en) * | 2007-07-26 | 2008-01-16 | 河海大学 | Portable on-spot and indoor dual-purpose direct-cutting experiment instrument and its sampling method |
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