CN219626175U - Experimental device for exploring liquid pressure law - Google Patents

Abstract

The utility model discloses an experimental device for exploring a liquid pressure law, which relates to the technical field of physical experimental equipment and comprises an acrylic capacity expansion plate, a function expansion plate, a telescopic rod, an MS5837 pressure sensor and an acrylic cylinder, wherein a power supply device and a 1306-OLED display screen are arranged on the acrylic capacity expansion plate, a wire connector is arranged on the acrylic capacity expansion plate, a plurality of second wires are arranged on the wire connector, the 1306-OLED display screen is connected with the power supply device through a plurality of second wires, one of the second wires is connected to the function expansion plate, and a Bluetooth module is integrated on the function expansion plate; according to the utility model, the ESP-WROOM-32 module is matched with the experimental software special for Phyhox to self-control the experimental device for measuring the internal pressure of the liquid for teaching, so that the data of the internal pressure of the liquid and the depth of the liquid can be accurately obtained, the relationship between the internal pressure of the liquid and the depth of the liquid can be quantitatively researched, the whole equipment is low in cost and simple in assembly.

Description

Experimental device for exploring liquid pressure law

Technical Field

The utility model relates to the technical field of physical experiment equipment, in particular to an experiment device for exploring a liquid pressure law.

Background

The "obligation educational physical course standard" (2022 edition) explicitly states that: the teacher fully plays the advantages of the information technology, effectively integrates the information technology into physical teaching, innovates a teaching mode and improves teaching efficiency. Meanwhile, students should be encouraged to apply information technology to physical learning, so that the students are helped to adapt to the requirements of the digital age, and the capability of the students to apply the information technology is improved. The aim of the physical course is to cultivate the core literacy of students, mainly comprising physical ideas, scientific thinking, scientific exploration, scientific attitude and responsibility. Scientific exploration is conducted under the guidance of physical concepts and scientific thinking, and can promote and promote scientific attitudes and responsibilities, and can also construct physical concepts and train scientific thinking through the scientific exploration. In short, scientific exploration is the main way for students to form other literacy, and is also a key capability. Therefore, the teacher is necessary to innovate teaching mode, excite students to scientifically explore consciousness, cultivate creative and scientific logic thinking of students, and obtain experimental conclusion based on experimental data, thereby improving informative literacy and academic core literacy of students

In the new lesson, the study of students "study of factors related to liquid pressure" is listed as study class students must do an experiment. The experiment appears in the junior middle school physical teaching materials of various versions, the generation reason, the size and the direction of the internal pressure of the liquid are analyzed in detail in the 'pressure of the liquid' of section 3 of chapter 6 on the nine-grade level of junior middle school physical of Huke edition, the rule of the internal pressure of the liquid is generalized, and the communicating vessel is introduced to be widely applied to production and life and the like. The U-shaped tube pressure gauge is formed by a small metal box (a thin rubber film is covered on the metal box) and a U-shaped glass tube, water or mercury is filled in the tube, when the pressure of the rubber film is zero, the liquid levels on two sides of the U-shaped tube are leveled (on the same horizontal line), when the rubber film is pressed, the liquid levels in the two tubes generate a height difference, and the larger the pressure is, the larger the height difference of the liquid levels in the two tubes is, so that the measured pressure can be known from the height difference of the liquid levels in the two tubes. In the actual daily teaching process, the teaching aid is large in size, so that students are inconvenient to use, and the students need to wait for reading after the liquid level is stationary during reading, so that the teaching aid is very complicated; the main component is glass products, which is extremely easy to damage or has safety accidents. Therefore, most physical teachers choose to replace student research experiments with teacher (or video) demonstration experiments, which greatly hinders the formation and development of student research thinking and is unfavorable for the formation of student scientific core literacy.

Based on the above, it is necessary to design an innovative experiment teaching aid which is convenient to carry, visual and accurate in reading, safe and cheap.

Disclosure of Invention

Therefore, the utility model aims to provide an experimental device for exploring the liquid pressure law, so as to solve the problems that in the real daily teaching process, the teaching aid is large in size, the use of students is inconvenient, and the students need to wait for reading after the liquid level is stationary during reading, so that the reading is very complicated; the main component is glass products, which is extremely easy to damage or has safety accidents. Most physical teachers choose to replace student research experiments with teacher (or video) demonstration experiments, which greatly hinders the formation and development of student research thinking and is unfavorable for the technical problem of student scientific core literacy formation.

In order to achieve the above purpose, the present utility model is realized by the following technical scheme:

the utility model provides an experimental apparatus for exploring liquid pressure law, includes ya keli dilatation board, function expansion board, telescopic link, MS5837 pressure sensor, ya keli cylinder, install power supply unit and 1306-OLED display screen on the acrylic dilatation board, install the connector on the acrylic dilatation board, the connector is installed a plurality of second wires, through a plurality of second wires will 1306-OLED display screen and power supply unit are connected, wherein a second wire is connected on the function expansion board, the function expansion board is integrated with bluetooth module, the connector is connected with a first wire, first wire is fixed on the telescopic link, MS5837 pressure sensor is installed to the telescopic link bottom, the bottom of first wire is connected on MS5837 pressure sensor;

the intelligent liquid pressure sensor is characterized in that water liquid is stored in the acrylic cylinder, an experimenter holds the telescopic rod to stretch an MS5837 pressure sensor at the bottom end of the telescopic rod into the water liquid in the acrylic cylinder to detect the liquid pressure, and the number relation between the pressure and the depth is obtained through a Bluetooth module connected with a phone end or a Phox special experimental software at a PC end.

As a preferable technical scheme of the utility model, the function expansion board and the acrylic expansion board can be placed on a teacher's desk of a laboratory, and also can be placed on a laboratory bench of the laboratory, so that experimental places and experimental positions can be selected in a variety, and experimental personnel can freely select experimental places according to different experimental environments.

As a preferred technical scheme of the utility model, the power supply device comprises a battery box fixed on the acrylic capacity expansion plate and a key switch arranged on the acrylic capacity expansion plate, wherein a dry battery is arranged in the battery box, and the battery box is electrically connected with the wire connector and the key switch respectively through second wires, so that an experimenter can conveniently control the experimental device to be opened and closed.

As a preferable technical scheme of the utility model, the function expansion board is provided with an ESP-WROOM-32 module, and the ESP-WROOM-32 module is integrated with a Bluetooth module.

As a preferable technical scheme of the utility model, a dovetail clamp is arranged between the outer wall of the telescopic rod extending into the acrylic cylinder and the top end of the acrylic cylinder to clamp and fix the telescopic rod, so that the bottom end of the telescopic rod extending into the acrylic cylinder is kept fixed.

As a preferable technical scheme of the utility model, the telescopic rod comprises a primary rod, a secondary rod and a tertiary rod, wherein a first sliding hole with a round hole structure is formed in the bottom end of the primary rod, the secondary rod is connected with the inner wall of the first sliding hole in a sliding manner, a second sliding hole with a round hole structure is formed in the bottom end of the secondary rod, and the tertiary rod is connected with the inner wall of the second sliding hole in a sliding manner, so that the telescopic rod can stretch out and draw back in any length.

As a preferable technical scheme of the utility model, the outer walls of the primary rod and the tertiary rod of the telescopic rod are respectively provided with the tightening belts, the first wire is tightly bound on the outer walls of the primary rod and the tertiary rod through the corresponding tightening belts, the fixing of the first wire is improved, and the installation position of the first wire is also convenient to adjust in the later stage.

As a preferable technical scheme of the utility model, the MS5837 pressure sensor is fixed at the bottom end of the three-stage rod, the outer wall of the MS5837 pressure sensor is provided with a hot melt adhesive coating, the MS5837 pressure sensor is coated by the hot melt adhesive, the surface of the MS5837 pressure sensor is subjected to waterproof treatment, and a metal probe of the MS5837 pressure sensor stretches into the outside of the hot melt adhesive, so that the MS5837 pressure sensor can better detect the liquid pressure, the normal operation of the MS5837 pressure sensor stretching into water can be ensured, and the accuracy of detecting the liquid pressure by the metal probe of the MS5837 pressure sensor is not influenced.

The utility model has the beneficial effects that:

the utility model utilizes the ESP-WROOM-32 module to be matched with the experimental software special for Phyhox to self-control the experimental device for measuring the internal pressure of the liquid, so that the data of the internal pressure of the liquid and the depth of the liquid can be accurately obtained, the relation between the internal pressure of the liquid and the depth of the liquid can be quantitatively researched, the whole equipment is low in cost and simple in assembly, a hardware service provider can also provide related hardware programs and specifications together, and the scientific principle behind the experimental device can be easily mastered for zero-base physical teachers. If the student does not have the mobile phone to automatically collect data, the student can manually record the paper notes through an external display, so that the student is very convenient. The teaching aid is developed after the defects of the traditional matched experiment teaching aid are analyzed, and through the self-made teaching aid, the information literacy of teachers and the thinking of creative guests are further enhanced. The information literacy of students is also improved, and the important guiding function of understanding physical thinking and scientific concepts in engineering design practice is achieved.

Additional advantages, objects, and features of the utility model 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 utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

FIG. 1 is a diagram of a complete experimental device of an experimental device for exploring the pressure law of liquid according to the present utility model;

FIG. 2 is a schematic diagram of a sectional structure of a telescopic rod of the experimental device for exploring the pressure law of liquid;

FIG. 3 is a schematic view showing a structure in which the MS5837 pressure sensor of the present utility model is mounted on a telescopic rod;

FIG. 4 is a graph showing the relationship between liquid depth and water pressure using the experimental software dedicated to Phyphox according to the present utility model;

FIG. 5 is a graph showing the liquid depth versus water pressure for the experimental software specific to Phyphox of the present utility model;

FIG. 6 is a flow chart of the data acquisition device of the experimental device for exploring the pressure law of liquid according to the present utility model;

in the figure: acrylic expansion board 1, battery box 2, dry battery 3, 1306-OLED display screen 4, key switch 5, connector 6, pluggable interface I7, second wire 8, pluggable interface II 9, function expansion board 10, bluetooth module 11, ESP-WROOM-32 module 12, first wire 13, telescopic rod 14, primary rod 1401, slide hole I1402, secondary rod 1403, slide hole II 1404, tertiary rod 1405, fastening belt 15, dovetail clip 16, acrylic cylinder 17, metal probe 18, hot melt adhesive 19, MS5837 pressure sensor 20.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the foregoing description of the utility model, it should be noted that the azimuth or positional relationship indicated by the terms "one side", "the other side", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "identical" and the like do not denote that the components are identical, but rather that there may be minor differences. The term "perpendicular" merely means that the positional relationship between the components is more perpendicular than "parallel" and does not mean that the structure must be perfectly perpendicular, but may be slightly tilted.

Example 1

Referring to fig. 1-3, a technical scheme provided by the present utility model is as follows: an experimental device for exploring a liquid pressure law comprises an acrylic capacity expansion plate 1, a function expansion plate 10, a telescopic rod 14, an MS5837 pressure sensor 20 and an acrylic cylinder 17, wherein a power supply device and a 1306-OLED display screen 4 are installed on the acrylic capacity expansion plate 1, a wire connector 6 is installed on the acrylic capacity expansion plate 1, the wire connector 6 is provided with a plurality of second wires 8, the 1306-OLED display screen 4 is connected with the power supply device through the plurality of second wires 8, one of the second wires 8 is connected to the function expansion plate 10, the function expansion plate 10 is integrated with a Bluetooth module 11, the wire connector 6 is connected with a first wire 13, the first wire 13 is fixed on the telescopic rod 14, the MS5837 pressure sensor 20 is installed at the bottom end of the telescopic rod 14, and the bottom end of the first wire 13 is connected to the MS5837 pressure sensor 20;

wherein, 1306-OLED display screen outer wall is provided with but plug interface one 7, but the lateral wall of function expansion board is provided with plug interface two 9, but through plug interface one 7 and plug interface two 9 that set up, dismantles second wire 8 when being convenient for the experimenter to assemble second wire 8 or later maintenance.

The liquid is stored in the acrylic cylinder 17, an experimenter holds the telescopic rod 14 to stretch the MS5837 pressure sensor 20 at the bottom end of the telescopic rod 14 into the liquid in the acrylic cylinder 17 to detect the liquid pressure, and the number relation between the pressure and the depth is obtained by connecting the Bluetooth module 11 with the phone end or the PC end of the Phox special experimental software.

In this embodiment, the function expansion board 10 and the acrylic expansion board 1 may be placed on a teacher's desk in a laboratory, or may be placed on a laboratory bench in a laboratory, where the laboratory location and the experimental position may be selected in a diversity manner, so that an experimenter may freely select the laboratory location according to different experimental environments.

In this embodiment, the power supply device includes a battery box 2 fixed on the acrylic expansion board 1, and a key switch 4 installed on the acrylic expansion board 1, a dry battery 3 is installed in the battery box 2, and the battery box 2 is electrically connected with the wire connector 6 and the key switch 4 through a second wire 8, so that an experimenter can control the experimental device to be opened and closed conveniently.

In the present embodiment, the ESP-wrook-32 module 12 is installed on the function expansion board 10, and the ESP-wrook-32 module 12 is integrated with the bluetooth module 11.

In this embodiment, a dovetail clip 16 is disposed between the outer wall of the telescopic rod 14 extending into the acryl cylinder 17 and the top end of the acryl cylinder 17 to clamp and fix the telescopic rod 14, so that the bottom end of the telescopic rod 14 extending into the acryl cylinder 17 is kept fixed.

In this embodiment, the telescopic rod 14 includes a first stage rod 1401, a second stage rod 1403, and a third stage rod 1405, a first slide hole 1402 with a circular hole structure is provided at the bottom end of the first stage rod 1401, the second stage rod 1403 is slidably connected to the inner wall of the first slide hole 1402, a second slide hole 1404 with a circular hole structure is provided at the bottom end of the second stage rod 1403, and a third stage rod 1405 is slidably connected to the inner wall of the second slide hole 1404, which is beneficial to the telescopic rod 14 to stretch and retract with any length.

In this embodiment, the outer walls of the primary rod 1401 and the tertiary rod 1405 of the telescopic rod 14 are respectively provided with a tightening belt 15, and the outer walls of the primary rod 1401 and the tertiary rod 1405 of the first wire 13 are both tied and bound by the corresponding tightening belts 15, so that the fixing of the first wire 13 is improved, and the installation position of the first wire 13 is also convenient to adjust in the later period.

As a preferred technical scheme of the utility model, the MS5837 pressure sensor 20 is fixed at the bottom end of the three-stage rod 1405, the outer wall of the MS5837 pressure sensor 20 is provided with a hot melt adhesive 19 for wrapping, the MS5837 pressure sensor 20 is wrapped by the hot melt adhesive 19, the surface of the MS5837 pressure sensor 20 is subjected to waterproof treatment, and the metal probe 18 of the MS5837 pressure sensor 20 extends into the outside of the hot melt adhesive 19, so that the MS5837 pressure sensor 20 can better detect the liquid pressure, the normal operation of the MS5837 pressure sensor 20 extending into water can be ensured, and the accuracy of detecting the liquid pressure by the metal probe 18 of the MS5837 pressure sensor 20 is not influenced.

Wherein, the MS5837 pressure sensor (full name: GY-MS5837 high precision liquid pressure sensor) is waterproof, because the MS5837 pressure sensor can not be waterproof as a chip, the MS5837 pressure sensor can be coated by the hot melt adhesive 19, the hot melt adhesive 19 should be prevented from being coated on the metal probe 18, and if the hot melt adhesive 19 is coated carelessly, the hot melt adhesive can be removed by hand or a blade, so as to avoid affecting the precision. Each component is assembled according to a building flow chart, an MS5837 pressure sensor is installed on a telescopic rod, water is injected into an acrylic cylinder, the MS5837 pressure sensor is stretched into water through a telescopic rod 14, and the depth and the direction of the MS5837 pressure sensor are changed. By observing 1306 real-time updated data on the OLED display 4, it is known that pressure is changing with depth. The ESP-WROOM-32 module 12 can be connected with the mobile phone by scanning the Bluetooth list through the phone-side phone-specific experimental software, and the software can automatically perform linear fitting to obtain the quantity relation between pressure and depth.

As shown in fig. 6, the MS5837 pressure sensor is a new generation of high-resolution I2C interface pressure sensor, and the high-resolution temperature output can simultaneously realize the function of a thermometer. The MS5837 pressure sensor can be matched with all types of micro controllers, the communication protocol is very simple, and ESP-WROOM-32 (ESP 32) is a new generation WiFi/Bluetooth dual-mode dual-core wireless communication chip recently released by Le Xin. 2 integrated bluetooth of chip and wiFi technique possess high performance dual-core processor, support the stand by of ultra-low power consumption, can be as a bluetooth external equipment and establish with the cell-phone and be connected, build liquid pressure and gather the system based on ESP32 module. The sensor is stretched into liquids with different depths (or different densities) through the telescopic rod, and liquid pressure data are collected in real time.

Example 2

Referring to fig. 1 to 6, another technical solution provided by the present utility model is the same as the above embodiment 1, in which the same points are not explained in the present embodiment, and the specific differences are that:

the experimental device for exploring the liquid pressure law comprises the following experimental steps:

(a) The teaching aid is assembled, a power supply is connected and turned on, and when each module works normally, the telescopic rod and the liquid pressure sensor together slowly extend into the container after water injection.

(b) And opening a Phyphox special experiment software, establishing connection through Bluetooth, clicking to start an experiment, collecting pressure data in real time, increasing the depth of a sensor, and collecting the linear relation between the pressure and the water depth.

(c) The image is amplified, the related data labels are selected by utilizing the translation and scaling functions of the chart, the relation between the pressure and the water depth is obtained, the slope and the intercept of the image can be displayed, and a teacher can explain related physical significance. While real-time data is also viewable on the LCD1602 liquid crystal display.

(d) The telescopic rod 14 is fixed on the cylinder mouth wall at the top end of the acrylic cylinder 17 by a dovetail clamp 16, and the wire is gently pulled, or the telescopic rod 14 is rotated to enable the sensor to collect data in different directions of the same depth. The analysis data concludes.

Example 3

Referring to fig. 4 and 5, another technical solution provided by the present utility model is the same as the above embodiment 1, in which the same points are not explained in the present embodiment, and the specific differences are that:

the experimental data of the experimental device for exploring the liquid pressure law in a specific experimental process are as follows:

1. the applicant recorded experimental data of liquid pressure and liquid depth collected in the Shanghai region (average elevation: 3 m) and Yunnan (average elevation: 2000), respectively, and tested the device accuracy. It can be seen intuitively that the atmospheric pressure is different at different altitudes.

Table one shows experimental data of liquid internal pressure and liquid depth (ambient temperature: 20 ℃ C., average altitude: 3 m) in Shanghai region, as shown in the following graph:

table two is the experimental data of the internal pressure and depth of the liquid in Yunnan region (ambient temperature: 20 ℃ C., average elevation: 2000 m)

Conclusion of the experiment

The relation between the internal pressure of the liquid and the depth of the liquid can be obtained by analyzing the table data, and experiments prove that: the pressure exists in all directions in the liquid, and the pressure in all directions is equal at the same depth. The greater the depth within the same fluid, the greater the fluid pressure there. Corresponding data labels are selected, and the analysis formula after linear fitting is y=0.977723x+803, intercept is 803hpa, which represents that local atmospheric pressure is 80300 Pa by taking data acquired in Yunnan area as an example. To calculate the pressure at the subsurface h, p=p can be calculated according to the pascal formula ₀ The data of this experiment are more accurate.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.

Claims (8)

1. The utility model provides an experimental apparatus of exploration liquid pressure law, includes ya keli dilatation board, function extension board, telescopic link, MS5837 pressure sensor, ya keli cylinder and installs the special experimental software of phox at cell-phone end or PC end, its characterized in that: the intelligent electronic device comprises an acrylic capacity expansion plate, wherein a power supply device and a 1306-OLED display screen are arranged on the acrylic capacity expansion plate, a wire connector is arranged on the acrylic capacity expansion plate, a plurality of second wires are arranged on the wire connector, the 1306-OLED display screen is connected with the power supply device through the plurality of second wires, one of the second wires is connected to a function expansion plate, the function expansion plate is integrated with a Bluetooth module, the wire connector is connected with a first wire, the first wire is fixed on a telescopic rod, an MS5837 pressure sensor is arranged at the bottom end of the telescopic rod, and the bottom end of the first wire is connected to the MS5837 pressure sensor;

the intelligent liquid pressure sensor is characterized in that water liquid is stored in the acrylic cylinder, an experimenter holds the telescopic rod to stretch an MS5837 pressure sensor at the bottom end of the telescopic rod into the water liquid in the acrylic cylinder to detect the liquid pressure, and the number relation between the pressure and the depth is obtained through a Bluetooth module connected with a phone end or a Phox special experimental software at a PC end.

2. An experimental device for exploring a law of liquid pressure according to claim 1, wherein: the function expansion board and the acrylic expansion board are placed on a teacher's desk or a laboratory bench of a laboratory.

3. An experimental device for exploring a law of liquid pressure according to claim 1, wherein: the power supply device comprises a battery box fixed on the acrylic capacity expansion plate and a key switch arranged on the acrylic capacity expansion plate, wherein a dry battery is arranged in the battery box, and the battery box is electrically connected with the connector and the key switch through second leads respectively.

4. An experimental device for exploring a law of liquid pressure according to claim 1, wherein: and the ESP-WROOM-32 module is installed on the function expansion board, and the ESP-WROOM-32 module is integrated with the Bluetooth module.

5. An experimental device for exploring a law of liquid pressure according to claim 1, wherein: and a dovetail clamp is arranged between the outer wall of the telescopic rod extending into the acrylic cylinder and the top end of the acrylic cylinder to clamp and fix the telescopic rod.

6. An experimental device for exploring a law of liquid pressure according to claim 1, wherein: the telescopic link includes one-level pole, second grade pole, tertiary pole, the slide hole one of round hole structure has been seted up to one-level pole bottom, slide hole one inner wall sliding connection has the second grade pole, the slide hole two of round hole structure has been seted up to the second grade pole bottom, slide hole two inner wall sliding connection has tertiary pole.

7. The experimental device for exploring the pressure law of a liquid of claim 6, wherein: the primary rod outer wall and the tertiary rod outer wall of the telescopic rod are respectively provided with a tightening belt, and the first lead is tightly bound on the primary rod outer wall and the tertiary rod outer wall through corresponding tightening belts.

8. The experimental apparatus for exploring the pressure law of a liquid of claim 7, wherein: the MS5837 pressure sensor is fixed at the bottom end of the three-stage rod, the outer wall of the MS5837 pressure sensor is provided with a hot melt adhesive for wrapping, and a metal probe of the MS5837 pressure sensor extends into the outside of the hot melt adhesive.