CN111487159A - Density measuring device based on communication technology of Internet of things - Google Patents
Density measuring device based on communication technology of Internet of things Download PDFInfo
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- G01N9/12—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials by observing the depth of immersion of the bodies, e.g. hydrometers
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Abstract
The embodiment of the invention discloses a density measuring device based on an internet of things communication technology, which comprises a bottom plate, wherein the bottom plate is provided with the density measuring device and is remotely connected with a virtual demonstration module through an internet of things communication module, the density measuring device comprises a column barrel and a quantitative water tank, a recording arm, a retaining arm and an ejector rod are sequentially sleeved in the column barrel from bottom to top through a lifting rod, the other end of the recording arm is provided with a sensor loading position, the other end of the retaining arm is provided with a lifting control device, the other end of the ejector rod is provided with an automatic power turntable, and the tail end of a lifting rope is provided with a group to be measured through an electronic dynamometer; according to the invention, the experimental processes in various forms are arranged in the same group of experimental devices, the verification is carried out according to various experimental principles, the experimental processes are converted into three-dimensional models based on the Internet of things, the dynamic part of the experiment can be highlighted through artificial processing, and the dynamic part is reproduced in the form of animation, so that the observation and understanding of students are facilitated.
Description
Technical Field
The embodiment of the invention relates to the technical field of physical experiment devices, in particular to a density measuring device based on the communication technology of the Internet of things.
Background
The physical experiment is a teaching method which can most intuitively embody the physical principle and the physical law, and the demonstration of some classical physical experiments or the demonstration of the details in the classical physical experiments are beneficial to students to better master the basic physical principle, so that a firmer foundation is laid for further study.
The density measurement experiment is a very classical experiment in physics teaching, and the experiment represents the most basic physical law, so that the density measurement experiment is used as an entrance experiment in general physics teaching for demonstration and teaching. In the conventional teaching of physical experiments, a teacher or a teaching assistant or a student generally performs experiments, and other students observe beside the teacher or perform experiments collectively, but due to the normative requirements of the physical experiments, the students cannot complete corresponding experiments according to standards, so that the students cannot visually recognize related physical laws. Because the physical experiment process is procedural and cannot be reproduced, the experiment process can only be continuously repeated to meet the observation requirements of students, but because of the randomness of the experiment process, the experiment data observed each time is different, and the students with poor comprehension ability cannot understand the principle in a short time.
In order to overcome the above problems, in the prior art, multimedia means are often used for recording and playing again to reproduce the experimental process, thereby helping students to further observe and understand the experimental principle. However, the interference is large in the experimental process, and the traditional video recording cannot filter the noise, so that the core of the experiment is difficult to highlight, and the observation of the experiment is not convenient. In the existing density measurement experiment process, density is often measured in one mode, results cannot be verified, the measured results are often verified by contrast materials, and the verification process is not convenient for developing thinking of students.
With the development of the internet of things technology, the reproduction and analysis of the experimental process are realized by means of the internet of things technology so as to help students understand the principle of the classical physical experiment, which will become the mainstream direction.
Disclosure of Invention
Therefore, the embodiment of the invention provides a density measuring device based on the communication technology of the internet of things, and aims to solve the problems that the core principle and noise interference cannot be embodied in multimedia shooting and recording and experimental verification cannot be performed on the result in the prior art.
In order to achieve the above object, an embodiment of the present invention provides the following:
a density measuring device based on the Internet of things communication technology comprises a bottom plate, wherein an Internet of things communication module and a density measuring device are fixedly installed on the bottom plate, and the Internet of things communication module is remotely connected with a virtual demonstration module;
density measuring device includes fixed mounting and is in column casing on the bottom plate sets up through electronic balance the quantitative water tank of the different specifications of bottom plate upper surface, the side of quantitative water tank is provided with water level measuring device there is the lifter through screw thread interlock swing joint in the column casing, last by supreme cover in proper order of lifter is equipped with recording arm, holding arm and ejector pin, the recording arm other end is provided with a plurality of sensor through the ring section of thick bamboo and carries the position holding arm other end fixed mounting has lift control device, the ejector pin other end is installed the winding and is had the automatic power carousel of lift rope, the lift rope passes lift control device and is connected with the electronic dynamometer the bottom of electronic dynamometer is provided with the group that awaits measuring through the couple.
As a preferred aspect of the present invention, the virtual presentation module includes:
the three-dimensional scanning modeling module is used for carrying out three-dimensional scanning on the density measuring device through scanning equipment, establishing a three-dimensional model according to a scanning result and identifying an action area and a static area through manual calibration;
a plurality of receiving templates and a common data processing module;
and the display module is used for projecting the data received by the receiving module after being processed by the data processing module into the three-dimensional model to perform dynamic display restoration according to the same time axis.
As a preferred scheme of the present invention, each of the receiving modules is electrically connected to a sensor disposed on the density measurement device through a data port, and each of the receiving modules is only electrically connected to a sensing device of the same type, the sensing devices respectively transmit acquired information to different receiving modules according to the same time axis, the receiving modules perform signal-to-noise ratio enhancement processing on the received acquired information and then transmit the acquired information to the data processing module for superposition, the data processing module superposes sensing signals of different types and then projects the superposed sensing signals onto the three-dimensional model for dynamic demonstration, and simultaneously, an actual photographic image according to the same time axis is displayed on a side surface of the three-dimensional model.
As a preferable aspect of the present invention, the quantitative water tanks are respectively provided with a central point, the central points coincide with the central point of the bottom plate, the bottom areas of the quantitative water tanks are respectively marked at the bottom, and the side walls of the quantitative water tanks are respectively provided with a water level height linear scale, and the division values of the water level height linear scales increase with the increase of the bottom areas of the quantitative water tanks.
As a preferred scheme of the invention, the lifting control device comprises a floating arm which is arranged at the bottom of a holding arm through a hinged disc, the other end of the floating arm is fixedly provided with a calibration cylinder, the floating arm is provided with a level, the top and the bottom of the calibration cylinder are both fixedly provided with an upper guide tube and a lower guide tube, the top of the upper guide tube is fixedly provided with a sleeve, a clamping plate is arranged in the sleeve through two groups of reset springs which are arranged oppositely, and a through groove for accommodating a lifting rope is arranged between the adjacent clamping plates;
connect through the cloud platform down between guide tube and the calibration section of thick bamboo, guide tube and calibration section of thick bamboo are inside to be provided with down and hold the perforation that the lift rope resistance-free passed, lie in down on the guide tube perforation surface is provided with annular laser head, annular laser head rotates along with the cloud platform and makes the laser direction that annular laser head sent be in vertical direction all the time.
As a preferable scheme of the present invention, a spring plate is fixedly installed inside the calibration cylinder, a plurality of sets of sliding grooves are provided on an outer surface of the spring plate, and an inlet and an outlet of the sliding grooves respectively correspond to the upper guide tube and the lower guide tube.
As a preferred scheme of the invention, the group to be measured comprises a plurality of blocks to be measured which are completely the same, adjacent blocks to be measured are sequentially connected in series through connecting ropes with equal length, a displacement sensor is arranged on the block to be measured positioned at the tail end, and the distance between the loading positions of the adjacent sensors is smaller than the vertical length of the block to be measured.
As a preferred scheme of the invention, the electronic balance is fixedly installed on the bottom plate, annular grooves are arranged on the surface of the electronic balance in a step-shaped distribution, the height of the annular grooves is gradually reduced from outside to inside, and the quantitative water tanks of different specifications are respectively arranged in the annular grooves.
As a preferable scheme of the invention, the water level measuring device comprises an F-shaped pile fixedly installed on a bottom plate outside the electronic balance, the edge of the electronic balance is wrapped by the F-shaped pile, a telescopic sliding guide rail is installed on the surface of the F-shaped pile through a ring buckle, a depth scale is fixedly installed at the end of the guide rail, and a camera is arranged on the depth scale.
As a preferable scheme of the invention, the automatic power turntable is provided with a limiter, and the limiting period of the limiter is equal to the sum of the vertical lengths of a connecting rope and a block to be measured.
The embodiment of the invention has the following advantages:
according to the invention, through setting various forms of experimental processes in the same group of experimental devices, experimental results are measured and calculated according to various experimental principles, mutual verification is carried out, the experimental processes are converted into a three-dimensional model based on the Internet of things, dynamic parts of experiments can be highlighted in the model through artificial processing, and the dynamic parts are reproduced in the form of animation, so that students can observe and understand the dynamic parts conveniently.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a schematic view of the overall structure of an embodiment of the present invention;
fig. 2 is a schematic structural view of an electronic balance according to an embodiment of the present invention;
FIG. 3 is a schematic view of a quantitative water tank according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a lift control device according to an embodiment of the present invention;
fig. 5 is a block diagram of a signal transmission in an internet of things according to an embodiment of the present invention.
In the figure: 1-a bottom plate; 2-an internet of things communication module; 3-a density measuring device; 4-a virtual demonstration module; 5-a quantitative water tank; 6-a lifting control device;
301-electronic balance; 302-a lifter; 303-recording arm; 304-a retaining arm; 305-a mandril; 306-a ring cylinder; 307-sensor loading position; 308-a lifting rope; 309-self-powered turntable; 310-electronic dynamometer; 311-group to be tested; 312-block under test; 313-a connecting rope; 314-a displacement sensor; 315-annular groove; 316-a stopper;
401-three-dimensional scanning modeling module; 402-receiving a template; 403-a data processing module; 404-a display module; 405-a data port;
501-water level measuring device; 502-water level height linear ruler; 503-F pile; 504-ring buckle; 505-a guide rail; 506-depth scale; 507-camera;
601-a hinged disk; 602-a floating arm; 603-a calibration cylinder; 604-a level; 605-an upper guide tube; 606-lower guide tube; 607-a sleeve; 608-a return spring; 609-clamping plate; 610-through groove; 611-cloud deck; 612-annular laser head; 613-spring plate; 614-sliding groove.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, the invention provides a density measuring device based on the internet of things communication technology, which comprises a bottom plate 1, wherein an internet of things communication module 2 and a density measuring device 3 are fixedly installed on the bottom plate 1, and the internet of things communication module 2 is remotely connected with a virtual demonstration module 4.
In the invention, based on the existing classical density measurement device 3, the classical density measurement device 3 is improved, so that the physical principle can be more intuitively embodied on one hand, on the other hand, data in the experimental process can be effectively shot and recorded through an additional sensor, active data processing is carried out through the virtual demonstration module 4, the acquired data is displayed in a modeling animation mode, the core in the physical experiment can be effectively highlighted, and the adjustment can be carried out according to the actual requirement in the reproduction process so as to meet different teaching requirements.
Based on the above, the density measuring device 3 in the present invention reproduces the real density measuring process;
the internet of things communication module 2 transmits the acquired data to the virtual demonstration module 4 for processing, the virtual demonstration module 4 analyzes the acquired data through a built-in algorithm, and the whole experimental process is reproduced in an animation mode based on the three-dimensional modeling principle, so that the core experimental process can be artificially highlighted, and the teaching process can be explained in the teaching process.
The density measuring device 3 of the present invention is specifically described below as a specific example:
the density measuring device 3 comprises a column fixedly arranged on the bottom plate 1 and quantitative water tanks 5 of different specifications arranged on the upper surface of the bottom plate 1 through electronic balances 301. Wherein the column casing is used for movably mounting the lifting rod 302, in this embodiment, the column casing and the lifting rod are engaged through screw threads to realize movable connection.
The utility model provides a lifting device, including lifter 302, recording arm 303, retaining arm 304 and ejector pin 305, recording arm 303 is last to be equipped with in proper order by supreme cover down, the recording arm 303 other end is provided with a plurality of sensor through a ring section of thick bamboo 306 and carries position 307 retaining arm 304 other end fixed mounting has lift control device 6, ejector pin 305 other end is installed the winding and is had the automatic power carousel 309 of lift rope 308, lift rope 308 passes lift control device 6 and is connected with electronic dynamometer 310 the bottom of electronic dynamometer 310 is provided with group 311 that awaits measuring through the couple.
The sensor mounting location 307 is used for mounting a sensor or an imaging device for detecting the displacement of the group 311 to be detected, and the detection of the displacement of the group to be detected in the present invention is not limited to the sensor or the imaging device, and the requirement can be satisfied by any electronic device that can acquire displacement data according to a set period.
The lifting control device 6 functions in three ways: the first aspect is to keep the lifting rope at a constant tightness degree all the time, and avoid the influence of measurement precision caused by the uncertain loosening of the lifting rope; the second aspect is that the moving speed of the lifting rope is kept in a controllable range, the sudden change of the moving speed cannot occur, and the lifting rope is always in an acceptable 'uniform speed' range; the third aspect always makes the lifting rope in the vertical direction, avoiding adding extra friction.
Based on the above, in the present invention, the lifting control device 6 includes a floating arm 602 mounted at the bottom of the holding arm 304 through an articulated disc 601, the other end of the floating arm 602 is fixedly mounted with a calibration cylinder 603, and a level 604 is mounted on the floating arm 602, and the floating arm 602 is adjusted by arranging the level 604 and the articulated disc 601, so that the floating arm 602 is always in a horizontal state, thereby ensuring that the lifting rope can be in a vertical direction.
An upper guide pipe 605 and a lower guide pipe 606 are fixedly mounted at the top and the bottom of the calibration cylinder 603, a sleeve 607 is fixedly mounted at the top of the upper guide pipe 605, clamping plates 609 are mounted in the sleeve 607 through two sets of oppositely arranged return springs 608, and a through groove 610 for accommodating the lifting rope 308 is arranged between the adjacent clamping plates 609. Adjacent splint carry out the centre gripping to the lifting rope under reset spring's effect to can prevent effectively that the lifting rope from too not hard up leading to invalid effectual regulation to be measured the displacement of group, cause the influence in the precision for subsequent calculation.
The lower guide tube 606 and the calibration tube 607 are connected through a holder 611, and are always in the vertical direction under the action of gravity through the arranged holder, a through hole for accommodating the lifting rope 308 to pass through without resistance is formed in the lower guide tube 606 and the calibration tube 607, an annular laser head 612 is arranged on the outer surface of the through hole on the lower guide tube 606, and the annular laser head 612 rotates along with the rotation of the holder 611 to enable the laser direction sent by the annular laser head 612 to be always in the vertical direction. Under normal conditions, the lifting rope is wrapped by the annular laser head 612, when the whole device deflects, laser generated by the annular laser head is no longer at the edge of the lifting rope, and an operator can judge whether the whole device is in a horizontal state according to the phenomenon.
In the present embodiment, it is necessary to ensure that the device is always in a horizontal state, because the density measurement uses a drainage method on one hand, and the volume of the drainage can be calculated according to the height of the water level only in the horizontal state, so as to obtain the actual volume of the group to be measured, otherwise the final measurement accuracy will be affected.
With respect to the second aspect described above, the embodiment maintains the lift cord velocity within a controlled range by: a spring plate 613 is fixedly installed inside the calibration cylinder 607, a plurality of sets of sliding grooves 614 are formed in the outer surface of the spring plate 613, and the inlets and outlets of the sliding grooves 614 respectively correspond to the upper guide pipe 605 and the lower guide pipe 606. The lifting rope is wound on the sliding groove in sequence, once the speed of the lifting rope changes suddenly, acting force on the spring plate is inevitably generated, so that the spring plate contracts, elastic reset force is generated after the spring plate contracts, and kinetic energy of the lifting rope is converted into elastic potential energy of the spring plate. The lifting speed of the lifting rope can be effectively controlled after the power of the lifting rope is released.
In the present invention, a water level measuring device 501 is disposed on a side surface of the quantitative water tank 5, as one preferred technical solution, the quantitative water tank 5 is provided with a central point, the central point coincides with a central point of the bottom plate 1, bottom areas of the quantitative water tank 5 are all marked at the bottom, a water level height linear ruler 502 is disposed on a sidewall of the quantitative water tank 5, and a division value of the water level height linear ruler 502 increases as the bottom area of the quantitative water tank 5 increases.
Because the base areas of the quantitative water tanks 5 with different specifications are different, in order to enable the measurement of the water discharge volume to be more accurate, a dynamic division value is adopted for the change of the water depth, namely the division value of the water depth is increased along with the increase of the base area.
In the invention, the water level measuring device 501 comprises an F-shaped pile 503 fixedly installed on a bottom plate outside the electronic balance 301, the edge of the electronic balance 301 is wrapped by the F-shaped pile 503, a telescopic sliding guide rail 505 is installed on the surface of the F-shaped pile 503 through a buckle 504, a depth scale 506 is fixedly installed at the end of the guide rail 505, and a camera 507 is arranged on the depth scale 506. Contrast and cooperation between degree of depth scale and the water level height linear scale to can be more accurate learn the change of water level height.
The to-be-tested group 311 includes a plurality of identical to-be-tested blocks 312, wherein the mass of each to-be-tested block 312 is known, and in the present embodiment, the total mass of a single to-be-tested block 312 and the connecting rope 313 connected thereto is known, and can be obtained by weighing with an electronic balance.
The adjacent blocks 312 to be measured are sequentially connected in series through connecting ropes 313 with equal length, a displacement sensor 314 is arranged on the block 312 to be measured at the tail end, and the distance between the adjacent sensor loading positions 307 is smaller than the vertical length of the block 312 to be measured.
And a limiting stopper 316 is arranged on the automatic power turntable 309, and the limiting period of the limiting stopper 316 is equal to the sum of the vertical lengths of one connecting rope 308 and one block 312 to be measured.
Namely, the displacement of a block to be measured can be adjusted only by adjusting each adjustment, so that the mass calculation and the density measurement are facilitated.
In addition, the electronic balance 301 is fixedly installed on the bottom plate 1, the surface of the electronic balance 301 is provided with annular grooves 315 distributed in a ladder shape, the height of the annular grooves 315 is gradually reduced from outside to inside, and the quantitative water tanks 5 of different specifications are respectively arranged in the annular grooves 315.
Based on the above, in the present invention, the density measurement is mainly performed by two methods, namely, a drainage method and a mechanical calculation method, and the following description will be made by combining the two methods.
Setting the mass of each block to be detected to be m, the number of the blocks to be detected entering water to be i, and the total number of the blocks to be detected to be n;
the bottom area of the quantitative water tank is SjThe height change of the water level is delta h;
the depth of the gravity center of the block to be measured is h after the block to be measured enters water;
the reading on the electronic dynamometer is F.
1) According to the setting, the method for calculating the density of the block to be measured by the drainage method comprises the following steps:
the density of the block to be measured is
2) The method for obtaining the density of the block to be measured by a mechanical calculation method comprises the following steps:
f- (n-i) mg-img ═ rho gh, converted into F-nmg ═ rho gh;
is calculated to obtain
Therefore, in the invention, the density of the block to be measured can be calculated by the same group of experimental devices through two different principles at the same time, so that the measurement and calculation results can be verified from two different angles, and the measurement and calculation results can be considered to be correct when the two are within a reasonable error range.
The result is verified in a measuring and calculating mode, so that an operator can more deeply experience the physical principle shown in the experiment.
The density measurement device described above, which is based on the same set of devices to achieve density measurement and calculation based on two different principles, in the present invention, only solves the technical problem in one aspect of the prior art, but in the present invention, how to achieve the reproduction of the physical experiment process based on the internet of things needs to be considered.
In order to solve the problems, the invention also comprises a virtual demonstration module 4, and the data of the virtual demonstration module 4 are all derived from the data shot by various sensors and cameras.
In a specific technical solution, the virtual demonstration module 4 includes:
the three-dimensional scanning modeling module 401 is used for performing three-dimensional scanning on the density measuring device 3 through scanning equipment, establishing a three-dimensional model according to a scanning result, and identifying an action area and a static area through manual calibration;
a number of receiving templates 402 and a common data processing module 403;
and a display module 404, configured to project the data received by the receiving module 402 and processed by the data processing module 403 into the three-dimensional model, and perform dynamic display and restoration according to the same time axis.
Each receiving module 402 is electrically connected with a sensor arranged on the density measuring device 3 through a data port 405, each receiving module 402 is only electrically connected with a sensing device of the same type, the sensing devices transmit acquired information to different receiving modules 402 according to the same time axis, the receiving modules 402 perform signal-to-noise ratio improvement processing on the received acquired information and transmit the acquired information to a data processing module 403 for superposition, the data processing module 403 projects the superposed sensing signals of different types onto a three-dimensional model for dynamic demonstration, and meanwhile, an actual photographic image according to the same time axis is displayed on the side face of the three-dimensional model.
In order to facilitate understanding of the above technical processes, the above processes are further explained in the present invention:
step 100, after the assembly of the experimental device is completed, a three-dimensional scanning result of the whole experimental device is obtained through scanning equipment, a three-dimensional model is established according to the scanning result, and meanwhile, a static supporting structure and a dynamic experimental process are respectively marked by a static area and an action area on the three-dimensional model.
200, in the whole experiment process, data of the sensor and the shooting camera are all concentrated into a receiving module, and are transmitted into a data processing module after being subjected to noise reduction processing of the receiving module;
it should be noted that in this step, the processing of the data needs to be concentrated on the same time axis, that is, the data of different sensors or cameras are sequenced in sequence according to the same time axis, and the collected data is set on the position node according to the point locations of the sensors and the cameras.
Step 300, dragging the time axis to display the acquired data on the three-dimensional model in an animation mode according to the sequence, so that the reproduction of the experimental process is realized.
In the step, because the data acquisition is continuous, the reproduction of the experimental process is also continuously reproduced in the form of animation, and because a three-dimensional modeling mode is adopted, the process shown in the invention is not a real image but a model image, and because the processing can be considered in the model image, the process of density measurement can be highlighted, so that students can observe the process. And because the time axis is controllable, the playing speed is also controllable.
The experimental process can be converted into a conventional video format after being processed, and then the video format is transmitted in the form of the Internet, so that remote watching and later rebroadcasting are realized.
In the invention, the working mode of the virtual demonstration module 4 needs to be further supplemented and explained, the virtual demonstration module 4 scans a three-dimensional model obtained by an experimental instrument based on scanning equipment, and further implants sensing data and camera data on the basis of the three-dimensional model, so that the experimental process is online on the three-dimensional model, and after main experimental data nodes are determined, other data can be calculated by an interpolation method, so that the accumulation of data required by the whole dynamic experiment is completed, and a dynamic experimental process is formed after rendering.
After a dynamic experimental process is formed, namely a real object experiment is converted into an animation experiment on the basis of actual measurement data, because the simulation is carried out in a mode of establishing the same time axis, the rendered animation can be synchronously observed with an actual shooting process, so that a key process is highlighted, and a real experimental process can be restored according to the time axis.
The features of the density measuring device in the present invention, which are different from the conventional ones, include the following two aspects:
for the density measuring device, the density measurement of various principles is realized by the same group of devices, so that the data verification before and after the operation is convenient, the acquisition of all data in the whole measuring process is realized in the verification process, and the whole experimental process is convenient to carry out data processing.
Based on the above, the method also comprises the step of processing the experimental data, the acquired sensing data and the camera data can be calculated into physical values in the processing process, the physical values and the three-dimensional modeling are combined to convert the physical values into animation forms, real experiments can be considered while the animation is played, so that the comparison and advantage complementation between the physical values and the animation can be realized, and the remote education can be realized based on the advantages of the Internet of things after the experimental process is digitalized.
In conclusion, the experimental processes in various forms are arranged in the same set of experimental devices, the experimental results are measured and calculated according to various experimental principles and verified mutually, the experimental processes are converted into the three-dimensional model based on the Internet of things, the dynamic part of the experiment can be highlighted through artificial processing in the model, and the dynamic part is reproduced in the form of animation, so that the observation and understanding of students are facilitated.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The density measuring device based on the Internet of things communication technology is characterized by comprising a bottom plate (1), wherein an Internet of things communication module (2) and a density measuring device (3) are fixedly installed on the bottom plate (1), and the Internet of things communication module (2) is remotely connected with a virtual demonstration module (4);
the density measuring device (3) comprises a column barrel fixedly mounted on the bottom plate (1) and a quantitative water tank (5) with different specifications on the upper surface of the bottom plate (1) through an electronic balance (301), a water level measuring device (501) is arranged on the side surface of the quantitative water tank (5), a lifting rod (302) is movably connected in the column barrel through thread engagement, a recording arm (303), a retaining arm (304) and a push rod (305) are sequentially sleeved on the lifting rod (302) from bottom to top, the other end of the recording arm (303) is provided with a plurality of sensor loading positions (307) through a ring barrel (306), a lifting control device (6) is fixedly mounted at the other end of the retaining arm (304), an automatic force turntable (309) wound with a lifting rope (308) is mounted at the other end of the push rod (305), and the lifting rope (308) penetrates through the lifting control device (6) and is connected with an electronic dynamometer (310), the bottom end of the electronic dynamometer (310) is provided with a group to be tested (311) through a hook.
2. The density measurement device based on the internet of things communication technology as claimed in claim 1, wherein the virtual demonstration module (4) comprises:
the three-dimensional scanning modeling module (401) is used for carrying out three-dimensional scanning on the density measuring device (3) through scanning equipment, establishing a three-dimensional model according to a scanning result, and identifying an action area and a static area through manual calibration;
a number of reception templates (402) and a common data processing module (403);
and the display module (404) is used for projecting the data received by the receiving module (402) processed by the data processing module (403) into the three-dimensional model to dynamically display and restore according to the same time axis.
3. The density measurement device based on the communication technology of the internet of things according to claim 2, characterized in that each receiving module (402) is electrically connected with a sensor arranged on the density measuring device (3) through a data port (405), and each receiving module (402) is only electrically connected with the same type of sensing equipment, the sensing equipment respectively transmits the acquired information to different receiving modules (402) according to the same time axis, the receiving module (402) carries out signal-to-noise ratio improvement processing on the received acquisition information and then transmits the acquisition information to the data processing module (403) for superposition, the data processing module (403) superposes different types of sensing signals and then projects the superposed sensing signals onto the three-dimensional model for dynamic demonstration, and meanwhile, the actual photographic images according to the same time axis are displayed on the side face of the three-dimensional model.
4. The density measuring device based on the internet of things communication technology as recited in claim 1, wherein the quantitative water tanks (5) are provided with center points, the center points coincide with the center point of the bottom plate (1), the bottom areas of the quantitative water tanks (5) are marked at the bottom, water level height linear scales (502) are arranged on the side walls of the quantitative water tanks (5), and the division values of the water level height linear scales (502) increase along with the increase of the bottom areas of the quantitative water tanks (5).
5. The density measuring device based on the IOT (Internet of things) communication technology is characterized in that the lifting control device (6) comprises a floating arm (602) which is installed at the bottom of the holding arm (304) through a hinged disc (601), the other end of the floating arm (602) is fixedly provided with a calibration cylinder (603), a level (604) is installed on the floating arm (602), the top and the bottom of the calibration cylinder (603) are fixedly provided with an upper guide pipe (605) and a lower guide pipe (606), the top of the upper guide pipe (605) is fixedly provided with a sleeve (607), clamping plates (609) are installed in the sleeve (607) through two sets of oppositely arranged return springs (608), and a through groove (610) for accommodating a lifting rope (308) is arranged between the adjacent clamping plates (609);
the lower guide tube (606) is connected with the calibration tube (607) through a holder (611), a through hole for accommodating the lifting rope (308) to pass through without resistance is formed in the lower guide tube (606) and the calibration tube (607), an annular laser head (612) is arranged on the outer surface of the through hole on the lower guide tube (606), and the annular laser head (612) rotates along with the rotation of the holder (611) to enable the direction of laser emitted by the annular laser head (612) to be always in the vertical direction.
6. The density measuring device based on the internet of things communication technology as claimed in claim 5, wherein a spring plate (613) is fixedly installed inside the calibration cylinder (607), a plurality of sets of sliding grooves (614) are arranged on the outer surface of the spring plate (613), and the inlets and outlets of the sliding grooves (614) respectively correspond to the upper guide pipe (605) and the lower guide pipe (606).
7. The density measuring device based on the internet of things communication technology as claimed in claim 1, wherein the group to be measured (311) comprises a plurality of identical blocks to be measured (312), the adjacent blocks to be measured (312) are sequentially connected in series through connecting ropes (313) with equal length, a displacement sensor (314) is arranged on the block to be measured (312) located at the tail end, and the distance between the adjacent sensor loading positions (307) is smaller than the vertical length of the block to be measured (312).
8. The density measuring device based on the internet of things communication technology as claimed in claim 1, wherein the electronic balance (301) is fixedly mounted on the bottom plate (1), annular grooves (315) are formed in the surface of the electronic balance (301) in a step-shaped distribution mode, the height of each annular groove (315) is gradually reduced from outside to inside, and the quantitative water tanks (5) of different specifications are respectively arranged in the annular grooves (315).
9. The density measuring device based on the internet of things communication technology according to claim 1, wherein the water level measuring device (501) comprises an F pile (503) fixedly installed on a bottom plate outside the electronic balance (301), the edge of the electronic balance (301) is wrapped by the F pile (503), a telescopic sliding guide rail (505) is installed on the surface of the F pile (503) through a ring buckle (504), a depth scale (506) is fixedly installed at the end of the guide rail (505), and a camera (507) is arranged on the depth scale (506).
10. The density measurement device based on the internet of things communication technology as claimed in claim 7, wherein a limiting stopper (316) is arranged on the automatic power turntable (309), and the limiting period of the limiting stopper (316) is equal to the sum of the vertical lengths of a connecting rope (308) and a block to be measured (312).
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