CN111896083A - Pallet balance and pallet balance teaching data acquisition system - Google Patents
Pallet balance and pallet balance teaching data acquisition system Download PDFInfo
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- CN111896083A CN111896083A CN202010943193.XA CN202010943193A CN111896083A CN 111896083 A CN111896083 A CN 111896083A CN 202010943193 A CN202010943193 A CN 202010943193A CN 111896083 A CN111896083 A CN 111896083A
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- 230000008054 signal transmission Effects 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000007405 data analysis Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 238000013480 data collection Methods 0.000 claims description 2
- 238000013500 data storage Methods 0.000 claims 1
- 230000009182 swimming Effects 0.000 claims 1
- 239000010409 thin film Substances 0.000 claims 1
- 238000002474 experimental method Methods 0.000 abstract description 20
- 238000004458 analytical method Methods 0.000 abstract description 15
- 238000005303 weighing Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000019771 cognition Effects 0.000 description 1
- 230000001149 cognitive effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G1/00—Weighing apparatus involving the use of a counterweight or other counterbalancing mass
- G01G1/18—Balances involving the use of a pivoted beam, i.e. beam balances
- G01G1/24—Platform-type scales, i.e. having the pans carried above the beam
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G1/00—Weighing apparatus involving the use of a counterweight or other counterbalancing mass
- G01G1/18—Balances involving the use of a pivoted beam, i.e. beam balances
- G01G1/26—Balances involving the use of a pivoted beam, i.e. beam balances with associated counterweight or set of counterweights
- G01G1/32—Balances involving the use of a pivoted beam, i.e. beam balances with associated counterweight or set of counterweights wherein the counterweights are in the form of rider-weights
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/18—Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
- G01G23/36—Indicating the weight by electrical means, e.g. using photoelectric cells
- G01G23/37—Indicating the weight by electrical means, e.g. using photoelectric cells involving digital counting
- G01G23/3728—Indicating the weight by electrical means, e.g. using photoelectric cells involving digital counting with wireless means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B19/00—Teaching not covered by other main groups of this subclass
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- Business, Economics & Management (AREA)
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- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention discloses a tray balance, which comprises a base, a beam support, a beam, a left tray, a right tray, a weight acquisition unit and a balance weight, wherein the beam is provided with a floating weight; a run number acquisition unit; the signal transmission unit is provided with a singlechip and a wireless transmitting module; wherein, weight acquisition unit is used for gathering the weight information of object on the left and right tray and sends to signal transmission unit, and the side code acquisition unit is used for gathering the positional information of side code, and signal transmission unit includes the singlechip, and the data signal of weight acquisition unit and side code acquisition unit is received to the singlechip, and the data communication interface of singlechip is connected with wireless transmitting module for give the host computer with data signal transmission. The invention has the advantages that the collection system can collect and record the using state of the balance and the experiment action of the students in the experiment teaching in real time, and carry out later analysis on the collected data and appraise the experiment operation process of each student.
Description
Technical Field
The invention relates to a teaching instrument, in particular to a tray balance and a teaching data acquisition system of the tray balance.
Background
Physics, chemistry and biology are courses based on experiments, and experimental teaching has important significance for the understanding ability, theoretical mastering ability and experimental ability cultivation of students. The teaching targets of physics, chemistry and biology comprise two fields of cognition and operation, more teaching problems are researched in the cognitive field, and less research is conducted in the experimental operation skill field. The objective of experiment teaching examination is to examine the operation skills and teaching results, find problems, continuously improve the problems and achieve the purpose of further improving the teaching quality.
The tray balance is the laboratory glassware that middle school physics, chemistry, common among the primary school's scientific experiment, when adopting traditional teaching laboratory glassware to carry out experimental teaching, because the student is many, the teacher is few, and the teacher can only judge student experiment operation action, the mastery condition of process through observing individual student's operation process and result, can not realize carrying out complete observation, instruction and judgement to single student's whole experiment operation process, more can not make accurate judgement to all students' learning condition. Whether students can master operation skills, understand subject knowledge and carry out practical application or not is judged accurately only by judging whether the steps of the whole experiment operation process are scientific or not and whether the actions are standardized or not and combining correct experiment results.
Disclosure of Invention
The invention aims to provide a tray balance and further provides a teaching data acquisition system of the tray balance.
In order to achieve the purpose, the invention can adopt the following technical scheme:
the invention relates to a tray balance, which comprises a base, a beam support, a beam, a left tray and a right tray which are arranged at two ends of the beam, wherein a floating weight is arranged on the beam, and the tray balance also comprises an acquisition system, wherein the acquisition system comprises:
a weight acquisition unit;
a run number acquisition unit;
the signal transmission unit is provided with a single chip microcomputer and a wireless transmitting module;
the power supply unit is electrically connected with the acquisition system and used for supplying power for the work of the acquisition system;
the weight acquisition unit is used for acquiring weight information of an object on the left tray and the right tray and sending the weight information to the signal transmission unit, the vernier code acquisition unit is used for acquiring position information of the vernier code and sending the position information to the signal transmission unit, the signal transmission unit comprises a single chip microcomputer, an analog signal input interface of the single chip microcomputer is used for receiving data signals of the weight acquisition unit and the vernier code acquisition unit through the analog signal amplification processing unit, and a data communication interface of the single chip microcomputer is connected with the wireless transmitting module and used for sending the data signals to the upper computer.
Preferably, the apparatus further comprises:
leveling the acquisition unit;
the leveling acquisition unit is used for acquiring leveling state information of the balance and sending the information to the signal transmission unit, the leveling acquisition unit is at least one angle sensor, and the angle sensor is arranged at the end part of the cross beam.
Preferably, the weight acquisition unit is a pressure sensor, and the pressure sensor is arranged between the base and the cross beam.
Preferably, the pressure sensor is a membrane pressure sensor.
Preferably, the vernier scale acquisition unit is a microspur laser range finder, and the microspur laser range finder is arranged at one end of the cross beam.
A pallet balance teaching data collection system comprising:
the data analysis unit comprises an upper computer, a wireless receiving module and a storage module;
a data acquisition unit comprising a plurality of said balance pans;
the data information of the plurality of tray balances is respectively transmitted to the wireless receiving module in a wireless mode, the wireless receiving module sends the data information to the upper computer, and the upper computer analyzes and processes the data information and then sends the data information to the storage module for storage.
Preferably, the system further comprises a display screen, and the display screen is used for calling and displaying the experimental data stored by the upper computer.
The invention has the advantages that the collection system can collect and record the using state of the balance and the experiment action of the students in the experiment teaching in real time, and carry out later analysis on the collected data and appraise the experiment operation process of each student. Meanwhile, big data analysis can be carried out on the problems reflected by a plurality of students in the daily experiment operation process, the students in classes, schools and even the whole area are judged to evaluate the mastering condition of the chemical experiment operation skills and the teaching result according to the analysis result, and common problems and weak links are found out, so that the teaching method is improved and promoted, and the teaching quality is further improved.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention.
Fig. 2 is a schematic block diagram of a circuit of embodiment 1 of the present invention.
Fig. 3 is a schematic block diagram of a circuit of embodiment 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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. It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement.
In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Example 1:
as shown in fig. 1 and 2, the balance with trays according to the present invention includes a base 10, a beam support 20, a beam 30, and a left tray 40 and a right tray 50 disposed at both ends of the beam 30, wherein a floating weight 60 is disposed on the beam 30, and further includes an acquisition system 70, and the acquisition system 70 includes:
leveling the acquisition unit;
a weight acquisition unit;
a run number acquisition unit;
the signal transmission unit 710, the signal transmission unit 710 has a single chip microcomputer and a wireless transmitting module;
the power supply unit is electrically connected with the acquisition system 70 and used for supplying power for the operation of the acquisition system 70;
the balance comprises a leveling acquisition unit, a signal transmission unit 710, a floating code acquisition unit, a singlechip (model: STM32F 103) of the signal transmission unit 710, an analog signal input interface of the singlechip, a signal amplification processing unit and a signal processing unit, wherein the leveling acquisition unit is used for acquiring leveling state information of the balance and transmitting the leveling state information to the signal transmission unit 710, the weight acquisition unit is used for acquiring weight information of objects on a left tray 40 and a right tray 50 and transmitting the weight information to the signal transmission unit 710, the floating code acquisition unit is used for acquiring position information of a floating code 60 and transmitting the position information to the signal transmission unit 710; the data communication interface of the singlechip is connected with a wireless transmitting module and used for transmitting a data signal to an upper computer;
the leveling acquisition units are a left angle sensor 720 and a right angle sensor 730 which are arranged at the positions of the left tray 40 and the right tray 50, the left angle sensor 720 and the right angle sensor 730 are packaged and then installed at two ends of the cross beam 30, the directions of the zero-degree-direction cross beam 30 induced by the left angle sensor 720 and the right angle sensor 730 are vertical (positive and negative errors are 0.5 degree), the installation positions are equal to the central position of the cross beam 30, and the errors are not more than positive and negative 1 mm; the parallelism error of the installation directions of the left angle sensor 720 and the right angle sensor 730 is not more than (plus or minus 0.5 degrees), and the quality error after encapsulation is not more than plus or minus 0.01 g;
the weight acquisition unit is a film pressure sensor 740 which is arranged at the middle supporting position between the beam support 20 and the base 10, the film pressure sensor 740 records the initial pressure F0 given by the beam support 20 after being arranged, during the experiment, the film pressure sensor 740 records the pressure data F, and the difference value between the F and the F0 is the pressure of the object on the base 10;
the vernier code acquisition unit is a microspur laser range finder 750, is arranged on the balance base 10 in a screw mode and is positioned on one side of the zero position of the balance scale 80, the ranging direction of the microspur laser range finder 750 is parallel to the direction of the scale 80 during installation, and laser can irradiate on the vernier code 60 without being blocked;
the signal transmission unit 710 and the power supply unit are packaged by a plastic box and then fixed in the base 10 by screws, and the wires of the left angle sensor 720, the right angle sensor 730, the film pressure sensor 740 and the microspur laser range finder 750 respectively penetrate through the base 10 from proper positions and are connected with the signal transmission unit 710;
specifically, the wires of the left angle sensor 720 and the right angle sensor 730 respectively extend into the base 10 from holes below, holes are formed in the base 10 below the film pressure sensor 740, the wires extend into the base 10 from the holes, holes are formed in the base 10 below the microspur laser range finder 750, and the wires extend into the base 10 from the holes; the wires of the left angle sensor 720 and the right angle sensor 730 are in a loose state, and the weighing precision is not influenced.
Experimental procedure 1: the student adjusts left balance nut 90 and right balance nut 91 to make the balance of tray level. Judging whether the student grasps the operation skill of leveling the tray balance by evaluating whether the tray balance is leveled or not; and evaluating whether students understand the lever principle, the relation between the moment and the moment arm and other related knowledge.
The data acquisition working principle is that after the students adjust the left balance nut 90 and the right balance nut 91 to finish the leveling action of the tray balance, the left angle sensor 720 and the right angle sensor 730 transmit the acquired angle data (beta 1, beta 2) to the upper computer through the signal transmission unit 710, and the analysis system analyzes the data; when the angle data (beta 1, beta 2) are within plus or minus 5 degrees, the tray balance is determined to be in a leveling state, the leveling action of the student can be judged to be correct, and when one of the angle data (beta 1, beta 2) exceeds plus or minus 5 degrees, the tray balance is determined to be in an unleveled state, and the leveling action of the student can be judged to be wrong.
Experimental procedure 2: the student makes the pointer point to the central scale line of the dividing plate again by placing the weight and operating the vernier 60, accurately weighs the mass of the object, and judges whether the student has mastered the operation skill of the weighing of the tray balance; and evaluating whether students understand the lever principle, the relation between the moment and the moment arm and other related knowledge.
The working principle of data acquisition is that after the student completes the operation:
1. data collected by the flexible film pressure sensor 740 are sent to an upper computer through the signal transmission unit 710, and collected numerical values are analyzed and converted through an analysis system, so that the total mass (M1) and 1/2 mass (M2) of weights and weighed objects in two trays of the tray balance are calculated;
2. the distance value (S) from the code 60 to the rangefinder measured by the macro laser rangefinder 750 is transmitted to the upper computer through the signal transmission unit 710. Analyzing and calculating the S value by an analysis system to obtain a reading (M3) of the game code 60;
3. the analysis system adds M2 and M3 to calculate the mass value of the weighing object (M4);
4. the analysis system compares M4 with the student filled-in quality value (M5), and judges that the student reading is correct when M4= M5 and that the student reading is wrong when M4 ≠ M5.
Example 2:
as shown in fig. 3, the teaching data collecting system of the balance comprises:
the data analysis unit 1 comprises an upper computer, a wireless receiving module and a storage module;
the data acquisition unit 2, the data acquisition unit 2 includes a plurality of tray balances;
the display screen is used for calling and displaying the experimental data stored by the upper computer;
the data information of the plurality of tray balances is respectively transmitted to the wireless receiving module in a wireless mode, the wireless receiving module sends the data information to the upper computer, the upper computer analyzes and processes the data information and then sends the data information to the storage module to be stored, and the display screen is used for calling and displaying the experimental data stored by the upper computer.
After receiving data information of the plurality of tray balances, the upper computer calculates and analyzes the acquired data according to professional data analysis software designed according to experimental requirements and a standardized algorithm, and judges whether actions of operation actions of students in the experimental process are standard and whether the sequence is correct, and whether disciplinary knowledge can be really mastered and understood and practical application is carried out. The evaluation conclusion can be fed back to the teacher and the students in real time through the display screen, so that the students can correct errors in time, or the students can make targeted supplementary learning under the guidance of the teacher. The problem that a plurality of students reflected in the daily experiment operation process can carry out big data analysis through this system, judge student of class, school and even whole area according to the analysis result and grasp the evaluation of condition and teaching result to the chemical experiment operating skill, find general problem and weak link to improve and promote the teaching method, further improve teaching quality.
The analysis principle is as follows:
1. after the upper computer receives the angle data (beta 1, beta 2) of each tray balance, the data are analyzed by an analysis system; when the angle data (beta 1, beta 2) are within plus or minus 5 degrees, the tray balance is determined to be in a leveling state, the leveling action of the student can be judged to be correct, and when one of the angle data (beta 1, beta 2) exceeds plus or minus 5 degrees, the tray balance is determined to be in an unleveled state, and the leveling action of the student can be judged to be wrong.
2. After the upper computer receives the pressure value of each tray balance, the data are analyzed and converted through an analysis system, and the total mass (M1) and 1/2 mass (M2) of weights and weighing objects in two trays of the tray balance are calculated; (b) the upper computer receives the distance value (S) of each tray balance, and the S value is analyzed and calculated through the analysis system to obtain the reading (M3) of the vernier 60; (c) the analysis system adds M2 and M3 to calculate the mass value of the weighing object (M4); (d) the analysis system compares M4 with the student's filled quality value (M5), and determines that the student's reading is correct when M4= M5 and incorrect when M4 ≠ M5.
Claims (7)
1. The utility model provides a tray balance, is in including base, beam support, crossbeam and setting the left tray and the right tray at crossbeam both ends be provided with the number of swimming on the crossbeam, characterized by still includes collection system, collection system includes:
a weight acquisition unit;
a run number acquisition unit;
a signal transmission unit;
the power supply unit is electrically connected with the acquisition system and used for supplying power for the work of the acquisition system;
the weight acquisition unit is used for acquiring weight information of an object on the left tray and the right tray and sending the weight information to the signal transmission unit, the vernier code acquisition unit is used for acquiring position information of the vernier code and sending the position information to the signal transmission unit, the signal transmission unit comprises a single chip microcomputer, an analog signal input interface of the single chip microcomputer is used for receiving data signals of the weight acquisition unit and the vernier code acquisition unit through the analog signal amplification processing unit, and a data communication interface of the single chip microcomputer is connected with the wireless transmitting module and used for sending the data signals to the upper computer.
2. The tray balance according to claim 1, further comprising a leveling acquisition unit, wherein the leveling acquisition unit is used for acquiring leveling state information of the balance and sending the information to the signal transmission unit, the leveling acquisition unit is at least one angle sensor, and the angle sensor is arranged at the end part of the beam.
3. The pallet balance according to claim 1, characterized in that the weight pick-up unit is a pressure sensor which is arranged between the base and the beam.
4. The pallet balance of claim 3, wherein the pressure sensor is a thin film pressure sensor.
5. The tray balance according to claim 1, wherein the rider collecting unit is a macro laser range finder disposed at one end of the beam.
6. The utility model provides a tray balance teaching data acquisition system, characterized by includes:
the data analysis unit comprises an upper computer, a wireless receiving module and a storage module;
a data acquisition unit comprising a plurality of said balance pans;
the data information of the plurality of tray balances is respectively transmitted to the wireless receiving module in a wireless mode, the wireless receiving module sends the data information to the upper computer, and the upper computer analyzes and processes the data information and then sends the data information to the storage module for storage.
7. The balance teaching data collection system of claim 6 wherein: the experimental data storage device further comprises a display screen, and the display screen is used for calling and displaying the experimental data stored by the upper computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010943193.XA CN111896083A (en) | 2020-09-09 | 2020-09-09 | Pallet balance and pallet balance teaching data acquisition system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010943193.XA CN111896083A (en) | 2020-09-09 | 2020-09-09 | Pallet balance and pallet balance teaching data acquisition system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114822160A (en) * | 2022-04-25 | 2022-07-29 | 上海瑞玛教育信息咨询有限公司 | Operation evaluation method of intelligent measuring cylinder for teaching |
| CN115855212A (en) * | 2022-10-27 | 2023-03-28 | 苏州科技大学 | Real-time weighing device and using method thereof |
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Cited By (3)
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| CN114822160A (en) * | 2022-04-25 | 2022-07-29 | 上海瑞玛教育信息咨询有限公司 | Operation evaluation method of intelligent measuring cylinder for teaching |
| CN115855212A (en) * | 2022-10-27 | 2023-03-28 | 苏州科技大学 | Real-time weighing device and using method thereof |
| CN115855212B (en) * | 2022-10-27 | 2024-07-19 | 苏州科技大学 | Real-time weighing device and application method thereof |
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