CN111946065A - Device and method for intelligently monitoring concrete vibration through current change - Google Patents
Device and method for intelligently monitoring concrete vibration through current change Download PDFInfo
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- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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Abstract
The invention discloses a device and a method for intelligently monitoring concrete vibration through current variation, wherein an information interaction module arranged in the device for intelligently monitoring concrete vibration through current variation acquires concrete technical parameters, a vibration current monitoring module monitors motor current in the vibration process, a current signal identification module generates an original current numerical value for the concrete technical parameters and identifies and contrasts the original current numerical value with the monitored current numerical value, and identification signals are given to an indicator light signal processing module and an indicator light at the vibration starting point, the vibration end point and the vibration overtime stage, so that the monitoring of the vibration process and the automatic judgment and indication of the vibration end point are realized, and the accuracy of the judgment of the vibration end point is improved. The method for intelligently monitoring the concrete vibration through the current change realizes the real-time monitoring of the concrete compaction state and the automatic judgment of the vibration time end point in the vibration process by the optimal vibration time judgment model established for the concrete, and the obtained vibration quality is high and stable.
Description
Technical Field
The invention relates to the technical field of concrete construction vibration quality control. More particularly, the present invention relates to an apparatus and method for intelligently monitoring concrete vibration through current variation.
Background
Concrete vibration is one of the important links of concrete construction quality control, during concrete placement, concrete mixture mobility through abundant vibration increases, accomplish the packing to concrete form predetermined space on the whole, concrete rheology can change simultaneously, the liquefaction of slurry component impels inside stagnant air to discharge with the bubble form and ease, the forced vibration of gathering materials, the posture of adjustment in the concrete, increase and cement paste area of contact, improve the interface adhesion, thereby each component of concrete reaches closely knit, firm, durable effect.
The early-stage cementing material particles are combined with water molecules through van der waals force, when the vibration time exceeds a certain degree, the intermolecular physical acting force is weakened or broken, the water originally wrapped by the cement particles is released and gathered excessively to form flowing water, the slurry cementing material particles and the water in the concrete are separated, namely, the concrete is subjected to bleeding, the slurry viscosity is reduced, the bearing capacity is insufficient, the aggregate relative density is large, the aggregate sinks, the concrete is isolated, the concrete strength is easy to reach the standard, and therefore the concrete quality control important link is ensured for the newly-mixed vibration effect. The current concrete vibration technical specification refers to the concrete structure engineering construction specification (GB50666-2011), wherein the concrete vibration specification is as follows: the vibrating rod is perpendicular to the surface of the concrete and is quickly inserted and slowly pulled to be uniformly vibrated; when the concrete surface has no obvious collapse, cement paste appears and no bubbles appear, the vibration of the part can be finished. The technical standard of the vibration terminal point is not enough in operability according to the standard description, the field vibration terminal point is judged completely by the experience of operators, the experience operation reliability is poor, and the conditions of over-vibration, under-vibration, leakage vibration and the like easily occur to the concrete, so that the quality of the concrete is uncontrollable.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
The invention also aims to provide a device and a method for intelligently monitoring concrete vibration through current change, so as to solve the technical problem that the vibration end point with the optimal vibration quality is inaccurately and uncontrollable by manually judging in the existing concrete vibration construction process.
In order to achieve these objects and other advantages in accordance with the present invention, there is provided an apparatus for intelligently monitoring concrete vibration through current variation, comprising a motor, a vibrating rod electrically connected to the motor, a vibrating current processor, a display screen, an indicator light and an input terminal electrically connected to the display screen, wherein the vibrating current processor is internally provided with a current signal identification module, and an information interaction module, a vibrating current monitoring module and an indicator light signal processing module which are respectively electrically connected to the current signal identification module,
the information interaction module is electrically connected with the display screen, and acquires concrete technical parameters through an input end and transmits the concrete technical parameters to the current signal identification module;
the vibration current monitoring module is electrically connected with the motor to monitor the current flowing through the motor in real time, and the vibration current monitoring module sends the monitoring current value to the current signal identification module;
the current signal identification module generates an original current value containing the vibrating current corresponding to the vibrating state according to the concrete technical parameters, compares the monitoring current value transmitted by the vibrating current monitoring module, judges three states of a vibrating starting point, a vibrating end point and vibrating overtime and sends identification signals of the corresponding states to the indicator light signal processing module;
and the indicating lamp signal processing module is electrically connected with the indicating lamp, the indicating lamp signal processing module respectively sends indicating signals to the indicating lamp according to the identification signals of the three states transmitted by the current signal identification module, and the indicating lamp works after receiving the indicating signals.
Preferably, the display screen is electrically connected with the vibration current monitoring module so as to display the vibration current on the display screen.
Preferably, the inside of the vibration current processor is further provided with a timing module which is electrically connected with the current signal identification module and the indicator light signal processing module respectively, the current signal identification module generates an original current value and an optimal vibration duration and sends the optimal vibration duration to the timing module, the current signal identification module identifies and monitors the current value as a vibration starting point, sends a signal to the timing module to start timing, and when the timing module reaches the optimal vibration duration, the timing module sends a time signal to the indicator light signal processing module, so that the indicator light signal processing module sends an indication signal corresponding to a vibration end point to the indicator light.
Preferably, the pilot lamp includes red pilot lamp, yellow pilot lamp and the green pilot lamp with pilot lamp signal processing module electric connection respectively, and the bright representation of green pilot lamp has not reached the terminal point of vibrating, and the bright representation of yellow pilot lamp reaches the terminal point of vibrating, and the bright representation of red pilot lamp vibrates overtime.
Preferably, the vibrating current processor is provided with a USB interface, the vibrating current processor is internally provided with a storage module electrically connected with the current signal identification module, the vibrating current monitoring module and the USB interface, and the storage module is used for storing data of the original current value and the monitoring current value changing along with time.
The invention also provides a method for intelligently monitoring concrete vibration through current change, which comprises the following steps:
s1, carrying out concrete vibration test, carrying out current monitoring on the vibration process of the concrete and carrying out comprehensive grading on the vibration quality;
s2, analyzing a kernel function of the nonlinear relation between different vibrating time and vibrating mass of the concrete, determining the optimal vibrating time of the concrete, and establishing an optimal vibrating time judgment model of the concrete;
and S3, guiding the concrete vibrating process in the field construction process by using the concrete optimal vibrating time judgment model.
Preferably, in step S1, when monitoring the current of the concrete vibrating process, the vibrating quality comprehensive score of the three evaluation indexes is performed by taking the current change rule as the vibrating terminal point represented by four values of 20%, 40%, 60% and 80% attenuation of the vibrating current, the initial stable value and the subsequent stable value, and testing the three evaluation indexes of the compressive strength, the chloride ion diffusion coefficient and the apparent mass of the concrete at the 7 vibrating terminal points.
Preferably, the current monitoring and the comprehensive grading of the vibrating quality are respectively carried out on the vibrating process of the concrete with different proportions, an original database of three factors of the technical parameters, the vibrating terminal point current and the comprehensive grading of the vibrating quality of the concrete with different proportions is established, relevance analysis is carried out by utilizing a support vector machine model based on the influence of the three factors of the original database to obtain a fitness function of the nonlinear mapping relation of the vibrating time and the vibrating quality of the concrete with different proportions, and meanwhile, the vibration quality comprehensive score is used as a target, the non-dominated sorting genetic algorithm is utilized to perform multi-target optimization of the vibration quality comprehensive score, a sample database with technical parameters of concrete of different proportions meeting the maximization of the concrete vibration quality comprehensive score is obtained, big data mining analysis is performed on the sample database by combining a convolutional neural network, and an optimal vibration time judgment model of the concrete is established.
Preferably, when the concrete is vibrated in the field construction process, the concrete vibration process in the field construction is guided by using the concrete optimal vibration time judgment model, and the concrete vibration process comprises the following steps:
s301, connecting the motor, the vibrating rod and the vibrating current processor into a power supply to enable the motor, the vibrating rod and the vibrating current processor to be in a standby preparation state;
s302, inputting technical parameters of concrete to be vibrated at an input end of a vibrating current processor, transmitting the technical parameters to a current signal identification module through an information interaction module, generating an original current value by the current identification module according to an optimal vibrating time judgment model in the current identification module, and automatically pushing optimal vibrating time on a display screen or directly inputting set vibrating time by a worker;
s303, starting the vibrating rod, lighting a green indicator light, and starting to monitor the vibrating current by the vibrating current monitoring module at a certain monitoring frequency;
s304, inserting the vibrating rod into concrete in the field construction process, and when the vibrating current monitoring module detects that the current is increased, the timing module starts to time the vibrating duration from one unit time of the vibrating current monitoring frequency before the current increasing moment, and a vibrating current-time curve is displayed on a display screen;
s305, when the vibration time reaches the optimal vibration time or the end point of the vibration time set by a worker, turning off a green indicator light, and turning on a yellow indicator light to remind of stopping vibration and carrying out rod lifting operation;
s306, if the operation of lifting the rod is completed smoothly, the yellow indicator light is turned off, and the green indicator light is turned on;
if the rod lifting operation is not finished, the yellow indicator lamp is turned off, the red indicator lamp is turned on, and after the rod lifting operation is finished, the red indicator lamp is turned off and the green indicator lamp is turned on.
Preferably, the technical parameters of the concrete to be vibrated are the slump of the concrete and the slump emptying time.
The invention at least comprises the following beneficial effects: the invention provides a device for intelligently monitoring concrete vibration through current change, which acquires technical parameter information input by a worker through an information interaction module and transmits the technical parameter information to a current signal identification module, the arranged vibration current monitoring module monitors the current flowing through a motor and a vibrating rod in the vibration process, records a current-time change curve during the working period and transmits a monitoring current value to the current signal identification module, the working current of the vibrating rod is associated with the vibration quality by combining the change rule of the concrete vibration quality along with the vibration time so as to monitor the change condition of the working current of the vibrating rod along with the time and reflect the real-time state of the concrete vibration compaction, an original current value is generated aiming at the concrete technical parameter through the current signal identification module and is identified and compared with the received monitoring current value, and the arranged indicating lamp signal processing module is combined, the monitoring of the vibrating process and the intelligent automatic judgment and indication of the vibrating terminal point are realized, the accuracy of the judging of the vibrating terminal point is improved, and the vibrating quality and labor cost of the concrete are effectively controlled. The method for intelligently monitoring concrete vibration through current variation provided by the invention carries out real-time monitoring in the concrete vibration process, utilizes the optimal vibration time judgment model established for the concrete before vibration, realizes the real-time monitoring of the concrete compaction state and the automatic judgment of the vibration time terminal point in the vibration process, and has the advantages of high obtained vibration quality and stable vibration quality.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus for intelligently monitoring concrete vibration through current variation according to the present invention;
fig. 2 is a schematic structural diagram of a vibrating current processor according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a vibrating current processor according to another embodiment of the present invention.
The specification reference numbers indicate: 1. the vibrating rod 2, the motor 3, the vibrating current processor 4, the display screen 5, the input end 6, the indicator light 7 and the USB interface.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It is to be noted that the test methods described in the following embodiments are, unless otherwise specified, conventional methods, and the reagents and materials, unless otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 and 2, the invention provides a device for intelligently monitoring concrete vibration through current variation, comprising a motor 2, a vibrating rod 1 electrically connected with the motor 2, a vibrating current processor 3, a display screen 4, an indicator light 6 and an input end 5 electrically connected with the display screen 4 arranged on the outer surface of the vibrating current processor 3, a current signal identification module and an information interaction module, a vibrating current monitoring module and an indicator light signal processing module respectively electrically connected with the current signal identification module arranged inside the vibrating current processor 3, wherein,
the information interaction module is electrically connected with the display screen 4, and acquires concrete technical parameters through the input end 5 and transmits the concrete technical parameters to the current signal identification module;
the vibration current monitoring module is electrically connected with the motor 2 to monitor the current flowing through the motor 2 in real time, and the vibration current monitoring module sends a monitoring current value to the current signal identification module;
the current signal identification module generates an original current value containing the vibrating current corresponding to the vibrating state according to the concrete technical parameters, compares the monitoring current value transmitted by the vibrating current monitoring module, judges three states of a vibrating starting point, a vibrating end point and vibrating overtime and sends identification signals of the corresponding states to the indicator light signal processing module;
and the indicating lamp signal processing module is electrically connected with the indicating lamp 6, the indicating lamp signal processing module sends indicating signals to the indicating lamp 6 respectively according to the identification signals of the three states transmitted by the current signal identification module, and the indicating lamp 6 works after receiving the indicating signals.
The vibrator for concrete generally adopts the eccentric block of gyration, and the vibrator commonly used in engineering is plug-in vibrator like the vibrating rod, and this type of vibrator is during concrete vibration, and the gyration of motor drive eccentric block produces sinusoidal simple harmonic motion, and the vibrating rod of burying in newly-poured concrete can take place pulse annular pressure wave rapidly, and the pressure that produces when the pressure wave transmission produces the compaction effect that vibrates to the concrete. During the vibration compaction, the vibration rod transmits work or energy to the concrete to make the concrete particles in motion state to reduce or eliminate internal friction, the components in the concrete obtain energy to move, the pressure change state in the newly poured concrete is changed from static state to fluid vibration state and rearranged, and the concrete tends to be compact in natural state, and because the concrete mixture with normal consistency has fluid property during vibration, the fluid dynamics theory is applied to calculate the concrete vibration principle.
Based on the principle of motor work, that is, converting electric energy into mechanical energy, and the conversion efficiency is the intrinsic parameter (defined as constant) of the machine
) The working power transferred to the concrete by the vibrating rod with fixed frequency can be expressed as
Wherein, the voltage U and the conversion efficiency
The power P is a constant function of the current I with a positive linear dependence. According to the positive linear correlation function relationship of the power P and the power I, the concrete with different proportions is vibrated, the uniform vibrating time is 40s, the current value of the vibrating rod in the concrete vibrating process is tested, and the monitoring frequency of the current value is 2 s/time. By synthesizing the vibration current-time curves of the concrete of each grade, the current values show the change law that the current values are increased and then decreased and finally tend to be stable, so that the energy transmitted by the concrete absorbing the vibrating rod during vibration is reduced from the maximum to the minimum, and the change curve can be represented by the working current-time change curve of the vibrating rod.
In the concrete vibrating process, the fluidity of the mixture changes along with the concrete state and basically shows positive correlation change along with the vibrating time, the fluidity tends to be stable after the mixture reaches an even and compact state, and the quality of the concrete is reduced when excessive vibrating exceeds the stable state maintaining time. According to the physical characteristics, based on the mass change rule test results of the concrete under different vibrating time conditions, the direct relation between the vibrating mass of the concrete and the vibrating current is established by combining the change rule of the vibrating rod current in each vibrating stage, the vibrating mass of the fresh concrete is output through an electric signal, the current real-time monitoring of the vibrating process of the concrete is realized, and the automatic judgment is carried out on the terminal point of the vibrating time in the vibrating process.
When the device that vibrates concrete through current change intelligence monitoring concrete vibrates guides the concrete vibration process in the field construction process, the use as follows:
(1) the motor is electrically connected with the vibrating rod and the vibrating current processor respectively to electrify the circuit, the motor, the vibrating rod and the vibrating current processor are in a standby state, then technical parameters of concrete to be vibrated are input at the input end, the input data are displayed on a display screen in real time, the display screen can also adopt an interactive LED screen, the input data are transmitted to a current signal identification module through an information interaction module, the current signal identification module generates an original current value according to the technical parameters of the concrete, namely, a mapping or a curve chart of the vibrating current flowing through the vibrating rod or the motor along with the change of the vibrating time in the vibrating process of the concrete within a certain time comprises current values corresponding to each time point and the optimal vibrating time end point within the vibrating time, wherein the stage that the vibrating rod is connected with the circuit to turn on the power supply but is not inserted into the concrete belongs to the idle state of the vibrating rod, the monitored real-time current is equal to the current when the motor does not work, when the vibrating rod is gradually inserted into concrete, the current begins to increase, the starting point of the current increase is the vibrating starting point, the concrete becomes dense along with the vibrating process until the vibrating end point is reached, the vibrating end point is selected according to the time point and the current value which correspond to the best vibrating quality, and the stage after the vibrating end point is the vibrating overtime state.
(2) The vibrating rod is started by the starting motor, the current flowing through the motor starts to be monitored at certain monitoring frequency of the vibrating current monitoring module such as 2 s/time or 1 s/time, the monitoring current value of the real-time current is sent to the current signal identification module to be identified, the vibrating rod is in an idle running state at the moment, the vibrating rod is inserted into concrete to be vibrated in the field construction process, the identification signal is sent to the indicator light signal processing module when the current signal identification module obtains the monitoring current value when the current starts to increase through the vibrating current monitoring module, the vibrating rod is a vibrating starting point at the moment, and then the vibrating rod continuously vibrates the concrete.
(3) When the current signal identification module contrasts and identifies the current value of the time end point of the monitored current value reaching the optimal vibration quality in the original current value, the vibration end point is judged at the moment, the identification signal of the corresponding state is sent to the indicator light signal processing module, and the indicator light signal processing module sends the indicator signal to the indicator light after receiving the identification signal.
(4) When the pilot lamp received the pilot signal of the terminal point of vibrating, remind operating personnel to carry out the vibrating rod and mention the operation, when the electric current signal identification module discerned that the electric current amplitude unanimous with original electric current numerical value lasts to reduce until getting back to the monitoring electric current numerical value of not inserting the vibrating rod into the concrete, accomplish the concrete operation of vibrating. If after the vibration terminal point is reached, the current signal identification module still continuously obtains a current value which is larger than that of the vibrating rod in idling through the vibration current monitoring module, then the vibration overtime is judged, an identification signal of a corresponding state is sent to the indicator light signal processing module, the indicator light signal processing module receives the identification signal and then sends an indication signal to the indicator light, and the indicator light reminds the vibrating overtime. The pilot lamp during operation can set up the lamp of different colours or luminance degree difference or scintillation mode difference etc. and carry out the suggestion of different states, can introduce different sound at the during operation even and improve the prompt effect of pilot lamp.
The device for intelligently monitoring concrete vibration through current variation acquires technical parameter information input by a worker through an information interaction module and transmits the technical parameter information to a current signal identification module, the arranged vibration current monitoring module monitors the current flowing through a motor and a vibration rod in the vibration process, records a current-time change curve during the working process and transmits a monitoring current value to the current signal identification module, the working current of the vibration rod is associated with the vibration mass by combining the change rule of the concrete vibration mass along with the vibration time so as to monitor the change condition of the working current of the vibration rod along with the time to reflect the concrete vibration compaction real-time state, an original current value is generated for the concrete technical parameter through the current signal identification module and is identified and compared with the received monitoring current value, and the arranged indicator light signal processing module is combined, the monitoring of the vibrating process and the intelligent automatic judgment and indication of the vibrating terminal point are realized, the accuracy of the judging of the vibrating terminal point is improved, and the vibrating quality and labor cost of the concrete are effectively controlled.
In another technical solution, as shown in fig. 2, the display screen 4 is electrically connected to the vibration current monitoring module, so as to display the vibration current on the display screen 4. With display screen and current monitoring module electric connection that vibrates, can show the current that flows through motor or vibrating rod on the display screen in real time, it is more directly perceived clear.
In another technical solution, as shown in fig. 2 and 3, a timing module electrically connected to the current signal identification module and the indicator light signal processing module is further disposed inside the vibrating current processor 3, the current signal identification module generates an original current value and an optimal vibrating time length and sends the optimal vibrating time length to the timing module, when the current signal identification module identifies and monitors the current value as a vibrating starting point, the current signal identification module sends a signal to the timing module to start timing, and when the timing module reaches the optimal vibrating time length, the timing module sends a time signal to the indicator light signal processing module, so that the indicator light signal processing module sends an indication signal corresponding to a vibrating end point to the indicator light 6.
The concrete vibration is intelligently monitored by utilizing the timing module in another mode, the identification workload of the current signal identification module is reduced, namely, the current signal identification module generates an original current value and a time difference value between a vibration end point with the best vibration quality and a vibration start point in the original current value, namely the best vibration time length, then the time difference value is sent to the timing module, the timing module starts timing, as long as the timing reaches the best vibration time length, the vibration end point is automatically judged to be the best vibration quality according to the current-time change rule, and then a time signal is sent to the indicator light signal processing module until an indicator light reminds constructors. The timing module that certainly sets up also can with display screen electric connection, according to the identification signal of three kinds of states that current signal identification module transmitted records in proper order that the duration is long during idle running, when vibrating, when carrying the stick and transmit for the display screen, make things convenient for constructor to know in real time before and after vibrating and the continuous situation of the process of vibrating.
In addition, the timing module can also be arranged on the vibrating current processor in another connection mode as shown in fig. 3: the timing module respectively with information interaction module, pilot lamp signal processing module, display screen electric connection, information interaction module obtains the length of time of vibrating of setting for through the input and transmits for the timing module, the timing module record the time of vibrating and arrive the length of time of vibrating of setting for to pilot lamp signal processing module time signal, make pilot lamp signal processing module send the pilot signal that corresponds with the terminal point of vibrating to the pilot lamp. The staff sets for the time of vibrating through the input by oneself, convenient to use, flexibility. Of course, when the staff sets the vibration time by self, the current signal identification module can also be used, the current signal identification module identifies the optimal vibration time length according to the original current value and sends the optimal vibration time length to the display screen, and the staff sets the needed vibration time length according to the optimal vibration time length. The timing module can comprise a timer and a signal receiving and transmitting module, timing, time resetting and the like are carried out through the timer, and signals are received and transmitted through the signal receiving and transmitting module.
In another technical solution, as shown in fig. 1, the indicator 6 includes a red indicator 6, a yellow indicator 6 and a green indicator 6, which are electrically connected to the indicator signal processing module, respectively, the green indicator 6 is turned on to indicate that the vibration end point has not been reached, the yellow indicator 6 is turned on to indicate that the vibration end point has been reached, and the red indicator 6 is turned on to indicate that the vibration time has elapsed.
The warning lamps with one color are respectively arranged at the vibration starting point, the vibration finishing point and the vibration overtime three operating points, so that the distinguishing is obvious, and a better warning effect is provided for workers.
In another technical solution, as shown in fig. 1, a USB interface 7 is disposed on the vibrating current processor 3, a storage module is disposed inside the vibrating current processor 3 and electrically connected to the current signal identification module, the vibrating current monitoring module, and the USB interface 7, respectively, and the storage module is configured to store data of the original current value and the monitoring current value changing with time.
Through setting up storage module can keep vibrating current-time data of vibrating stick in last period of time, set up the USB interface and can connect the USB flash disk of peripheral hardware and derive the memory data. The vibrating current processor can be connected with a motor through an additional USB interface, and is adaptive to motors and vibrating rods with different frequencies and different vibrating requirements.
The invention also provides a method for intelligently monitoring concrete vibration through current change.
Example 1:
the method for intelligently monitoring concrete vibration through current change comprises the following steps:
s1, performing a vibration test on the concrete with the determined label, monitoring the change of the current flowing through the plug-in vibrator along with the time to obtain a vibration current-time change curve chart, and then evaluating and scoring the vibration quality of the concrete with the label at a plurality of time points on the vibration current-time change curve chart. The evaluation of the vibration quality is generally scored by a plurality of evaluation indexes such as compressive strength, chloride ion diffusion coefficient, apparent mass and the like, and the higher the comprehensive score is, the better the compaction performance of the concrete is when the vibration reaches the time point.
And S2, analyzing the corresponding relation between the comprehensive vibration quality scores of the points and the vibration time obtained in the step S1, analyzing a kernel function of the nonlinear relation between different vibration times and the vibration quality of the concrete, obtaining the time point with the highest comprehensive vibration quality score in the vibration process as the optimal vibration time point, and establishing an optimal vibration time judgment model of the concrete, wherein the elapsed time is the optimal vibration time.
And S3, guiding the concrete vibrating time in the field construction process by using the concrete optimal vibrating time judgment model, monitoring the vibrating current in the vibrating process, stopping vibrating when the vibrating current reaches the current value corresponding to the labeled optimal vibrating time, and finishing vibrating operation.
Example 2:
in addition to the steps included in embodiment 1, the method for intelligently monitoring concrete vibration through current change further includes, in step S1, when current monitoring is performed on the vibration process of concrete, taking the current change rule as the vibration end point represented by four values of 20%, 40%, 60% and 80% attenuation of the vibration current, an initial stability value and 7 subsequent stability values, testing three evaluation indexes of the compressive strength, the chloride ion diffusion coefficient and the apparent mass of the concrete at 7 vibration end points, and performing vibration quality comprehensive scoring of the three evaluation indexes.
Concrete vibrating masses corresponding to different vibrating durations (current values of vibrating terminal points) have large differences, wherein 28d of compressive strength, chloride ion diffusion coefficient and apparent mass are selected as three representative evaluation indexes to represent the quality of the vibrating mass, the time points corresponding to the 7 current values are used as the vibrating terminal points, the vibrating mass evaluation is carried out, the vibrating mass is associated with the vibrating current and the vibrating time, the optimal vibrating time point is conveniently and quickly found, the optimal vibrating time is determined, the error is small, and the test efficiency is high.
Example 3:
the method for intelligently monitoring concrete vibration through current change comprises the steps of embodiment 1, and can be used for respectively carrying out vibration tests on concrete with different proportions to obtain the optimal vibration time data of the concrete with different proportions, establishing a sample database, and meeting different construction requirements, wherein the concrete method comprises the following steps:
respectively carrying out current monitoring and comprehensive grading of the vibration quality on the vibration process of the concrete with different proportions, establishing an original database of three factors of the technical parameters, the vibration end point current and the comprehensive grading of the vibration quality of the concrete with different proportions, carrying out relevance analysis by utilizing a support vector machine model based on the influence of the three factors of the original database to obtain a fitness function of the nonlinear mapping relation between the vibration time and the vibration quality of the concrete with different proportions, and meanwhile, the vibration quality comprehensive score is used as a target, the non-dominated sorting genetic algorithm is utilized to perform multi-target optimization of the vibration quality comprehensive score, a sample database with technical parameters of concrete of different proportions meeting the maximization of the concrete vibration quality comprehensive score is obtained, big data mining analysis is performed on the sample database by combining a convolutional neural network, and an optimal vibration time judgment model of the concrete is established.
By means of a support vector machine model, a non-dominated sorting genetic algorithm and a convolutional neural network algorithm, optimization target judgment of multiple factors of technical parameters, vibration end point current and vibration quality of concrete with different proportions can be achieved, an optimal vibration time judgment model of the concrete is established quickly, and after the model is led into a current signal identification module, identification of current signals is enabled to be more intelligent.
Example 4:
except for the steps included in embodiment 1, the method for intelligently monitoring concrete vibration through current change guides the concrete vibration process in site construction by using the optimal vibration time judgment model of concrete when vibrating the concrete in the site construction process, and specifically includes the following steps:
s301, connecting a motor, a vibrating rod and a vibrating current processor into a power supply to enable the motor, the vibrating rod and the vibrating current processor to be in a standby preparation state, wherein indicator lamps are a red indicator lamp, a yellow indicator lamp and a green indicator lamp which are respectively and electrically connected with an indicator lamp signal processing module, the green indicator lamp is on to indicate that the vibrating terminal point is not reached, the yellow indicator lamp is on to indicate that the vibrating terminal point is reached, and the red indicator lamp is on to indicate that the vibrating is overtime;
s302, inputting technical parameters of concrete to be vibrated at an input end of a vibrating current processor, transmitting the technical parameters to a current signal identification module through an information interaction module, generating an original current value by the current identification module according to an optimal vibrating time judgment model in the current identification module, and automatically pushing the optimal vibrating time on a display screen, namely determining vibrating current under the optimal vibrating quality or directly inputting vibrating time by a worker;
s303, starting the vibrating rod, lighting a green indicator light, and starting to monitor the vibrating current by the vibrating current monitoring module at a certain monitoring frequency, wherein the monitoring frequency of the vibrating current is set to be 2S/time;
s304, inserting the vibrating rod into concrete in the field construction process, and when the vibrating current monitoring module detects that the current is increased, timing the vibrating time from 2S before the current increasing moment, and displaying a vibrating current-time curve on a display screen;
s305, when the vibration time reaches the optimal vibration time or the end point of the vibration time set by a worker, turning off a green indicator light, turning on a yellow indicator light, reminding to stop vibration and carrying out bar lifting operation, wherein the turning-on duration time of the yellow indicator light can be preset to 5S;
s306, if the operation of lifting the rod is completed smoothly, the yellow indicator light is turned off, and the green indicator light is turned on;
if the rod lifting operation is not finished, namely the rod lifting operation is not finished after more than 5s, the yellow indicator lamp is turned off, the red indicator lamp is turned on, then the rod lifting operation is finished, the red indicator lamp is turned off, and the green indicator lamp is turned on;
the green light is turned on and the tamper returns to the state at step S303.
Through the steps, the operation guidance can be conveniently carried out on the vibrating process of the site construction, and the automatic monitoring is realized.
Example 5:
in examples 1 to 4, the technical parameters of the concrete to be vibrated are selected as the slump and the slump emptying time of the concrete, and the rest steps are the same as the specific steps of the method for intelligently monitoring the concrete vibration through the current change in the examples 1 to 4.
Slump is the workability of concrete, and is the performance indicating whether the concrete is easy to construct and operate and is uniform and dense, and the main influencing factors include water quantity, water-cement ratio, sand rate, cement variety, aggregate condition, time, temperature, additives and the like. And the concrete slump and the slump emptying time of the concrete with two proportions such as C40 strength grades can have large difference, and the optimal vibration time is different for the vibration current. Therefore, the concrete slump and the collapse emptying time are used as the reference for establishing the model, and the concrete with different proportions can be better distinguished.
The vibration tests of the project A and the project B are respectively carried out by utilizing the method for intelligently monitoring concrete vibration through current change and the manual vibration mode. The manual vibration mode is according to the judgment requirement about the vibration terminal point in the concrete structure engineering construction specification (GB50666-2011), and the vibration is automatically completed by workers by combining the vibration experience of the workers. The concrete vibration method intelligently monitored through current change adopts the specific method of the embodiment 3 and sets the input technical parameters as the concrete slump and the slump emptying time. And respectively sampling concrete to be vibrated in each group of the project A and the project B on the same disc of concrete of the mixing station of the project A and the project B, wherein the slump of the concrete sampled in the project A is 185mm, the slump emptying time is 19s, the slump of the concrete sampled in the project B is 205mm, and the slump emptying time is 16 s. After the vibration is finished, core samples of the concrete of each group are respectively taken, the 28d compressive strength, the chloride ion diffusion coefficient and the apparent mass of the concrete are tested, the 28d compressive strength test standard is tested according to the concrete physical and mechanical property test method standard GBT 50081 and 2019, the chloride ion diffusion coefficient test standard is tested according to the common concrete long-term performance and durability test method standard GB/T50082 and the appearance quality evaluation standard GB50204-2015, the vibration quality is comprehensively graded according to the three test results, the comprehensive grading can be set into a grade according to the experience of technical personnel, wherein the grade of the concrete with higher 28d compressive strength is higher, the chloride ion diffusion coefficient is smaller, the water ripple and the bubble are not generated in the apparent mass, the test results obtained for items A and B are shown in tables 1 and 2, respectively.
TABLE 1 test results for item A
TABLE 2 test results for item B
As can be seen from tables 1 and 2, in the item a and the item B, the groups a4, a5, a6 and B4, B5 and B6 of the method for intelligently monitoring concrete vibration through current change according to the present invention are higher than the groups a1, a2, A3 and B1, B2 and B3 of the group where the manual vibration mode is located, so that the overall vibration quality of the concrete vibration is significantly higher, the compressive strength, the chloride ion diffusion coefficient and the apparent mass of the vibrated concrete 28d of the embodiment 3 are maintained at a good level, the data difference is small, while the manual vibration mode has large vibration mass fluctuation in the vibration tests of different groups, and the best level of the manual vibration mode is not significantly different from the vibration quality obtained by the method of the embodiment 3, and the condition and experience of vibration technicians are strongly dependent. Therefore, the method for intelligently monitoring concrete vibration through current variation establishes an optimal vibration time judgment model of the concrete before vibration, and judges the time end point of the optimal vibration quality as the vibration end point by monitoring the concrete vibration process in real time and utilizing the optimal vibration time judgment model, thereby realizing the real-time monitoring of the concrete compaction state and the automatic judgment of the vibration time end point in the vibration process, and obtaining high vibration quality and stable vibration quality.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. The device for intelligently monitoring concrete vibration through current change is characterized by comprising a motor, a vibrating rod and a vibrating current processor, wherein the vibrating rod and the vibrating current processor are electrically connected with the motor, the outer surface of the vibrating current processor is provided with a display screen, an indicator light and an input end which is electrically connected with the display screen, the vibrating current processor is internally provided with a current signal identification module, an information interaction module, a vibrating current monitoring module and an indicator light signal processing module which are respectively and electrically connected with the current signal identification module, and the vibrating current processor is characterized in that the vibrating rod and the vibrating current processor are respectively connected with the current signal identification module,
the information interaction module is electrically connected with the display screen, and acquires concrete technical parameters through an input end and transmits the concrete technical parameters to the current signal identification module;
the vibration current monitoring module is electrically connected with the motor to monitor the current flowing through the motor in real time, and the vibration current monitoring module sends the monitoring current value to the current signal identification module;
the current signal identification module generates an original current value containing the vibrating current corresponding to the vibrating state according to the concrete technical parameters, compares the monitoring current value transmitted by the vibrating current monitoring module, judges three states of a vibrating starting point, a vibrating end point and vibrating overtime and sends identification signals of the corresponding states to the indicator light signal processing module;
and the indicating lamp signal processing module is electrically connected with the indicating lamp, the indicating lamp signal processing module respectively sends indicating signals to the indicating lamp according to the identification signals of the three states transmitted by the current signal identification module, and the indicating lamp works after receiving the indicating signals.
2. The apparatus for intelligent monitoring of concrete vibration through current change according to claim 1, wherein said display screen is electrically connected to the vibration current monitoring module to display the vibration current on the display screen.
3. The apparatus according to claim 1, wherein the tamper current processor is further provided therein with a timing module electrically connected to the current signal identification module and the indicator light signal processing module, respectively, the current signal identification module generates an original current value and an optimal tamper time and sends the optimal tamper time to the timing module, the current signal identification module identifies the monitored current value as a tamper start point and sends a signal to the timing module to start timing, and when the timing module reaches the optimal tamper time, the timing module sends a time signal to the indicator light signal processing module, so that the indicator light signal processing module sends an indicator signal corresponding to a tamper end point to the indicator light.
4. The apparatus for intelligent monitoring of concrete vibration through current change according to any one of claims 1 to 3, wherein the indicator lights comprise a red indicator light, a yellow indicator light and a green indicator light which are respectively electrically connected with the indicator light signal processing module, the green indicator light is on to indicate that the vibration end point is not reached, the yellow indicator light is on to indicate that the vibration end point is reached, and the red indicator light is on to indicate that the vibration is overtime.
5. The apparatus for intelligently monitoring concrete vibration through current variation according to any one of claims 1 to 3, wherein the vibrating current processor is provided with a USB interface, and a storage module electrically connected with the current signal identification module, the vibrating current monitoring module and the USB interface is arranged inside the vibrating current processor, and is used for storing data of the original current value and the monitoring current value changing along with time.
6. The method for intelligently monitoring concrete vibration through current change is characterized by comprising the following steps of:
s1, carrying out concrete vibration test, carrying out current monitoring on the vibration process of the concrete and carrying out comprehensive grading on the vibration quality;
s2, analyzing a kernel function of the nonlinear relation between different vibrating time and vibrating mass of the concrete, determining the optimal vibrating time of the concrete, and establishing an optimal vibrating time judgment model of the concrete;
and S3, guiding the concrete vibrating process in the field construction process by using the concrete optimal vibrating time judgment model.
7. The method for intelligently monitoring concrete vibration through current variation according to claim 6, wherein in step S1, when monitoring the current during the vibration of the concrete, the current variation law is represented as the vibration end point by four values of 20%, 40%, 60% and 80% attenuation of the vibration current, the initial stability value and the subsequent stability value, and the three evaluation indexes of the compression strength, the chloride ion diffusion coefficient and the apparent mass of the concrete at the 7 vibration end points are tested, and the vibration quality comprehensive evaluation of the three evaluation indexes is performed.
8. The method of claim 7, wherein the vibrating process of the concrete with different proportions is respectively monitored by current and the vibrating quality is scored, the original database of the three factors of the technical parameter, the vibrating end point current and the vibrating quality comprehensive score of the concrete with different proportions is established, the relevance analysis is performed by using a support vector machine model based on the influence of the three factors of the original database to obtain the fitness function of the nonlinear mapping relation between the vibrating time and the vibrating quality of the concrete with different proportions, meanwhile, the vibrating quality comprehensive score is used as the target, the non-dominated sorting genetic algorithm is used for multi-objective optimization of the vibrating quality comprehensive score to obtain the sample database of the concrete with the technical parameter of the concrete with different proportions meeting the maximization of the vibrating quality comprehensive score of the concrete, and (4) carrying out big data mining analysis on the sample database by combining a convolutional neural network, and establishing an optimal vibration time judgment model of the concrete.
9. The method for intelligently monitoring concrete vibration through current variation according to any one of claims 6 to 8, wherein when the concrete is vibrated in the field construction process, the concrete vibration process in the field construction is guided by using the concrete optimal vibration time judgment model, and the method specifically comprises the following steps:
s301, connecting the motor, the vibrating rod and the vibrating current processor into a power supply to enable the motor, the vibrating rod and the vibrating current processor to be in a standby preparation state;
s302, inputting technical parameters of concrete to be vibrated at an input end of a vibrating current processor, transmitting the technical parameters to a current signal identification module through an information interaction module, generating an original current value by the current identification module according to an optimal vibrating time judgment model in the current identification module, and automatically pushing optimal vibrating time on a display screen or directly inputting set vibrating time by a worker;
s303, starting the vibrating rod, lighting a green indicator light, and starting to monitor the vibrating current by the vibrating current monitoring module at a certain monitoring frequency;
s304, inserting the vibrating rod into concrete in the field construction process, and when the vibrating current monitoring module detects that the current is increased, the timing module starts to time the vibrating duration from one unit time of the vibrating current monitoring frequency before the current increasing moment, and a vibrating current-time curve is displayed on a display screen;
s305, when the vibration time reaches the optimal vibration time or the end point of the vibration time set by a worker, turning off a green indicator light, and turning on a yellow indicator light to remind of stopping vibration and carrying out rod lifting operation;
s306, if the operation of lifting the rod is completed smoothly, the yellow indicator light is turned off, and the green indicator light is turned on;
if the rod lifting operation is not finished, the yellow indicator lamp is turned off, the red indicator lamp is turned on, and after the rod lifting operation is finished, the red indicator lamp is turned off and the green indicator lamp is turned on.
10. The method for intelligently monitoring concrete vibration through current variation as claimed in claim 9, wherein the technical parameters of the concrete to be vibrated are slump and slump emptying time of the concrete.
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