CN108345256A - A kind of drilling shear test data automatic collection control system - Google Patents
A kind of drilling shear test data automatic collection control system Download PDFInfo
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- CN108345256A CN108345256A CN201810441711.0A CN201810441711A CN108345256A CN 108345256 A CN108345256 A CN 108345256A CN 201810441711 A CN201810441711 A CN 201810441711A CN 108345256 A CN108345256 A CN 108345256A
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
Abstract
The invention discloses a kind of drilling shear test data automatic collection control systems.It includes for acquiring cutting head shear stress and being converted into the data collecting system of digital signal, for receiving digital signal and for the automatic control system of motor control signal, and the motor driven systems for being sheared according to control signal driving cutting head, the data collecting system includes the pressure sensor being sequentially connected in series, signal processing module and data acquisition module, the motor driven systems include the motor drive module of motor and control motor rotation speed, the data input pin of the data output end connection automatic control system of the data acquisition module, the control signal output of the automatic control system connects motor drive module signal input part, the driving end of the signal output end connection motor of the motor drive module.The easy to operate, stable work in work of the present invention, success of the test rate are high, reduce the personnel amount and labor intensity of experiment, improve test efficiency.
Description
Technical field
The invention belongs to ground performance data collection technical fields, and in particular to a kind of drilling shear test data is adopted automatically
Collect control system.
Background technology
Drilling shearing test (Borehole Shear Test, abbreviation BST) is that a kind of side wall in prebored hole is cut
The home position testing method that experiment obtains soil body cohesive strength and internal friction angle is cut, bearing capacity of pile foundation, side slope, barricade, depth are can be applied to
The engineerings such as design of foundation pit and landslide geologic survey.
Compared with indoor direct shear test, drilling shearing test directly carries out shearing test in drilling at the scene, avoids pair
The disturbance of the soil body is tested, to the clay, silt and sand etc. of the saturation state for being difficult to sample, the advantage for the shearing test that drills is more
Obviously.Therefore, drilling shearing test is liked that application study at home in recent years is got over by ground expert engineer and scientific research person
Come more extensive.
Existing shearing test equipment to cutting head 3 by gas tank 1, appendix 2 as shown in Figure 1, apply pressure, by hand
The turbine structure 4 of formula drives cutting head to be sheared, and shear stress is shown using pressure gauge 5, by manually recording shearing
Stress, the equipment automatization and intelligence degree are relatively low, and it is as follows to be primarily present problem during the test：
1, artificial hand shear rate is uneven, causes success of the test rate low：First class pressure experiment is required to 1 people and continuously shakes
Handle, rotating speed must keep about 2 revolutions per seconds, totally 400~800 turns, and duration 3~5 minutes, each testing site need to carry out 5 stage pressure examinations altogether
It tests, total time-consuming 30~60 minutes；Since labor intensity is big, usually since testing crew body is tired out, shear rate is unbalanced, punching
The failure test soil body is hit, shear stress curve peak value can not occurs, lead to test failure.
2, data record accuracy rate is not high, influences test accuracy：The shear stress of experiment process is by pointer pressure
It has been shown that, needs to want 1 test data sheet personnel record's shear stress, recording frequency 2~5s/ times；Due to shearing lasting progress, shearing
Stress constantly changes at any time, and artificial reading is difficult to accurately, the case where mispronouncing or reading less often occur.
3, Data Analysis Services inefficiency：After field test, testing crew need to be handled test data, hand
It paints or using correlation graphs such as Software on Drawing shear stress and time such as excel, calculates shear parameters value, and repairing experiment achievement
Report, heavy workload, efficiency are low.
Invention content
The purpose of the present invention is exactly insufficient in order to solve existing for above-mentioned background technology, provide a kind of high degree of automation,
Data acquire convenient, efficient drilling shear test data automatic collection control system.
The technical solution adopted by the present invention is：A kind of drilling shear test data automatic collection control system, including be used for
Acquisition cutting head shear stress is simultaneously converted into the data collecting system of digital signal, for receiving digital signal and being used for motor control
The automatic control system of signal processed and for according to the motor driven systems sheared of control signal driving cutting head,
The data collecting system includes the pressure sensor, signal processing module and data acquisition module being sequentially connected in series, the motor
Drive system includes the motor drive module of motor and control motor rotation speed, the data output end of the data acquisition module
Connect the data input pin of automatic control system, the control signal output connection motor driving of the automatic control system
Module by signal input terminal, the driving end of the signal output end connection motor of the motor drive module.
Further, the signal processing module includes concatenated signal amplification module and filter module, and the signal is put
Big module input connects pressure sensor output end, and filter module output end connects data acquisition module input terminal.
Further, the automatic control system includes microcontroller, and the single-chip data input terminal connection data are adopted
Collect module data output end, control signal output connects motor drive module signal input part.
Further, the automatic control system further includes detecting mould for monitoring the driving current of motor working current
Block, data output end, the output end of the driving current detection module input terminal connection motor drive module connect microcontroller
Signal input part.
Further, the automatic control system further includes the Bluetooth communication mould for transmitting digital signal to host computer
The data communication ends of block, the bluetooth communication and microcontroller connect.
Further, the automatic control system further includes the LCD MODULE for showing digital signal, institute
It states LCD MODULE input terminal and shows that output end is connect with microcontroller.
The present invention controls motor by automatic control system and drives cutting head, by pressure sensor automatic data collection, behaviour
Make easy, a people can complete all operations in experiment, drop to 15~30min with 30~60min when experiment；Motor and automatic
Control system stable work in work is often tested under stage pressure and apparent peak value occurs, and success of the test rate is high；Test data is adopted
Collection, storage zero defect and hysteresis, precision, accuracy and the composition error of data are superior to original equipment；Data Management Analysis
Accuracy and efficiency be obviously improved；Test result uploads more convenient quickly；Reduce personnel amount and the labour of experiment
Intensity, test operation, the time-consuming of Data Analysis Services are substantially reduced, and improve test efficiency.
Description of the drawings
Fig. 1 is the schematic diagram of the prior art.
Fig. 2 is the system schematic of the present invention.
Fig. 3 is the conditional curve figure that shearing test is carried out using the present invention.
Fig. 4 is the result map that shearing test is carried out using the present invention.
Fig. 5 is host computer data separating handling principle block diagram.
1- gas tanks；2- appendixs；3- cutting heads；4- turbine structures；5- pressure gauges；6- pressure sensors；7- signal processings
Module；8- signal amplification modules；9- filter modules；10- data acquisition modules；11- microcontrollers；12- motor drive modules；13-
Motor；14- driving current detection modules；15- bluetooth communications；16- host computers；17- LCD MODULEs.
Specific implementation mode
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments, convenient for this hair is well understood
It is bright, but they do not constitute the present invention and limit.
As shown in Fig. 2, the present invention includes being acquired for acquiring cutting head shear stress and being converted into the data of digital signal
System, for receive digital signal and for motor control signal automatic control system and for according to control signal
The motor driven systems that driving cutting head is sheared, the data collecting system include the pressure sensor 6 being sequentially connected in series, letter
Number processing module 7 and data acquisition module 10, the motor driven systems include the electricity of motor 13 and control motor rotation speed
Machine drive module 12, the data input pin of the data output end connection automatic control system of the data acquisition module 10, institute
The signal input part of the control signal output connection motor drive module 12 of automatic control system is stated, the motor drives mould
The driving end of the signal output end connection motor 13 of block 12.
In said program, motor 13 is 42HS4813A4 type large torque DC stepper motors, external direct current power supply 24V.Electricity
Machine drive module 12 is step actuator, which receives pulse signal, and angular displacement is controlled by controlling pulse number,
The speed and acceleration of motor rotation are controlled by controlling pulse frequency.
In said program, signal processing module 7 includes concatenated signal amplification module 8 and filter module 9, and the signal is put
8 input terminal of big module connects 6 output end of pressure sensor, and 9 output end of filter module connects 10 input terminal of data acquisition module.Its
Middle pressure sensor 6 uses WPJ type micro pressure sensors, signal amplification module 8 to use instrument amplifier AD624, filters mould
Block 9 is made of low-pass filter and high-pass filter, and low frequency and high-frequency signal is prevented to pass through.Data acquisition module 10 uses
U812BL data collecting systems, resolution ratio are 12, and sampling rate is less than 100kHz, the range of data acquisition module be 0~5V,
± 5V, 0~10V, ± 10V.
In said program, automatic control system includes microcontroller 11, driving current detection module 14, is used for host computer
Transmit the bluetooth communication 15 of digital signal and the LCD MODULE 17 for showing digital signal.The microcontroller 11 counts
According to 10 data output end of input terminal connection data acquisition module, control signal output connection 12 signal of motor drive module input
End.Data output end, the output end of 14 input terminal of the driving current detection module connection motor drive module 12 connect monolithic
The signal input part of machine 11.The bluetooth communication 15 is connect with the data communication ends of microcontroller 11.The liquid crystal display mode
17 input terminal of block shows that output end is connect with microcontroller 11.
The core of 11 control system of the present invention of microcontroller：1. being responsible for the generation and distribution of pulse signal, pulse signal passes through
Motor driver, and then control speed, acceleration and the angular displacement of motor rotation；2. being responsible for processing driving current detection module
The current value detected；3. being responsible for the data such as electric current that motor speed, rotation direction, current detection module detect passing through indigo plant
Tooth communication module is sent to computer, and microcontroller 11, which uses model, to be AT89S51.Driving current detection module 14 is
The current sensor chip of ACS785ACS712 series, for monitoring motor working current, it is ensured that the quick startability of motor,
When failure occurs, hardware is protected in time.Bluetooth communication 15 uses BT-HC05 modules, realizes the wireless of serial ports transparent transmission and data
Transmission.
After control system power supply, reset circuit of SCM initializes power-on reset system.It, can after the completion of initialization
The operation that button executes inquiry, corrects wait-for-response, carries out button operation, and automatic control system program can be called and be held
The corresponding subprogram of row.Host computer 16, which uses, uses bluetooth communication between tablet computer, with microcontroller 11.Data point in tablet computer
Analysis processing routine by parameter setting module 18, be filtered module 19, image display module 20, Data Analysis Services module 21,
Data memory module 22, data inquiry module 23 and test result generation module 24 form.Motor is arranged in parameter setting module 18
13 rotational parameters.It is filtered module 19, using middle position value filtering method, filters the interference signal in gathered data.Figure is aobvious
Show 20 pieces of mould, the figure of regression equation after the completion of showing the curves such as relationship of shear stress and time in shear history and shearing
Picture.Data Analysis Services module 21 completes the line style of normal stress and shear stress data to acquiring shear stress analyzing processing
It returns, calculates parameters of shear resistant.Data memory module 22 stores the initial data and analysis result of acquisition.Test result
Generation module 23 generates experimental report according to analysis result.Enquiry module 24, to historical test data carry out query analysis and
Processing.Data Analysis Services program function block diagram is shown in Fig. 5.
Application program running environment：1. hardware device processor 1GHz or more, memory 1GB or more；2. being suitable for
Android4.0 and system above, development environment Eclipse.
When obtaining soil body parameters of shear resistant using drilling boxshear apparatus, edited and recorded first according to the drilling of test site, drill column
The data such as figure, drill core choose testing site, creep into a vertical drilling to underground, cutting head is put into preboring by installation drilling boxshear apparatus
In drilling, start the control system of the present invention.
On-test, opens gas tank, applies normal pressure to cutting head, tests the soil body in cutting head hold-down apertures week.Upper
The information such as test site, stratum are recorded in machine, the test parameters such as setting cutting head rotating speed, steering, Motor control parameters are through bluetooth
Communication module is sent to microcontroller, and microcontroller generates pulse signal, and pulse signal is through motor driver, driving motor rotation, warp
Turbine and worm drives to cutting head, and device to hole Zhou Tuti is sheared.
In shear history, WPJ type micro pressure sensors receive shear pressure signal, and pass through signal processing module sum number
It is converted into digital signal according to acquisition module, microcontroller receives digital signal, and is uploaded to host computer by bluetooth communication, together
When also on LCD MODULE real-time display shear pressure and time curve.
After shearing, test data can automatically extract at different levels through Data Analysis Services module in host computer application program
Normal pressure down cut peak stress draws mole-coulomb (Mohr-Coulomb) envelope of normal pressure σ and shear stress τ
Line carries out linear regression, calculates the magnitude of cohesive strength c and internalfrictionangleφ.Through image display, regression equation image is drawn
And correlation coefficient value.Through data memory module, program automatically stores the initial data of acquisition and analysis data, through achievement
Report generation module generates test result report.
Field test shows that this patent is easy to operate, and a people can complete all operations in experiment, when experiment with 30~
60min drops to 15~30min；Motor and automatic control system stable work in work are often tested under stage pressure and are occurred obviously
Peak value, success of the test rate is high；The acquisition of test data, storage zero defect and hysteresis, the precision of data, accuracy and comprehensive
It closes error and is superior to original equipment；The accuracy and efficiency of Data Management Analysis is obviously improved；It is more convenient that test result uploads
Quickly；Reduce the personnel amount and labor intensity of experiment, test operation, the time-consuming of Data Analysis Services are substantially reduced, and are improved
Test efficiency, test result are as shown in Figure 3, Figure 4.
The content not being described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (6)
1. a kind of drilling shear test data automatic collection control system, it is characterised in that：Including being used to acquire cutting head shearing
Stress is simultaneously converted into the data collecting system of digital signal, for receiving digital signal and for the automation of motor control signal
Control system and for according to the motor driven systems sheared of control signal driving cutting head, data acquisition system
System includes pressure sensor (6), signal processing module (7) and data acquisition module (10) block being sequentially connected in series, the motor driving
System includes motor (13) and controls the motor drive module (12) of motor rotation speed, the number of the data acquisition module (10)
The data input pin of automatic control system, the control signal output connection of the automatic control system are connected according to output end
Motor drive module (12) signal input part, the driving of the signal output end connection motor (13) of the motor drive module (12)
End.
2. drilling shear test data automatic collection control system according to claim 1, it is characterised in that：The signal
Processing module (7) includes concatenated signal amplification module (8) and filter module (9), and signal amplification module (8) input terminal connects
Pressure sensor (6) output end is connect, filter module (9) output end connects data acquisition module (10) input terminal.
3. drilling shear test data automatic collection control system according to claim 1, it is characterised in that：It is described automatic
Networked control systems include microcontroller (11), microcontroller (11) data input pin connection data acquisition module (10) data output
End, control signal output connect motor drive module (12) signal input part.
4. drilling shear test data automatic collection control system according to claim 1, it is characterised in that：It is described automatic
Networked control systems further include the driving current detection module (14) for monitoring motor working current, and the driving current detects mould
Block (14) input terminal connects the signal input of the data output end of motor drive module (12), output end connection microcontroller (11)
End.
5. drilling shear test data automatic collection control system according to claim 1, it is characterised in that：It is described automatic
Networked control systems further include the bluetooth communication (15) for transmitting digital signal to host computer, the bluetooth communication
(15) it is connect with the data communication ends of microcontroller (11).
6. drilling shear test data automatic collection control system according to claim 1, it is characterised in that：It is described automatic
Networked control systems further include for showing the LCD MODULE of digital signal (17), LCD MODULE (17) input terminal
Show that output end is connect with microcontroller (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810441711.0A CN108345256A (en) | 2018-05-10 | 2018-05-10 | A kind of drilling shear test data automatic collection control system |
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| CN201810441711.0A CN108345256A (en) | 2018-05-10 | 2018-05-10 | A kind of drilling shear test data automatic collection control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115142713A (en) * | 2021-03-30 | 2022-10-04 | 东南大学 | Modern in-situ test standard test field and construction method thereof |
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| CN115142713B (en) * | 2021-03-30 | 2024-03-12 | 东南大学 | Modern in-situ test standard test field and construction method thereof |
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