A device for measuring the relationship between pressure and flow rate changes in experiments

Abstract

The embodiment of the present invention discloses a device for measuring the relationship between pressure and flow rate changes for experiments, which relates to the field of physical experimental devices and is invented for measuring the pressure value and flow rate value of a fluid. The device includes: a gas velocity acquisition component, a gas pressure acquisition component; the first wooden board and the second wooden board of the gas channel are placed in parallel and perpendicular to the bottom plate, and the bottom plate and the top plate are placed in parallel; the connecting shaft of the gas velocity acquisition component passes through the first wooden board and the second wooden board and is placed on the bracket, the three wind cup components are installed on the connecting shaft, and the photoelectric code disk of the photoelectric speed sensor is installed at the end of the connecting shaft; the weighing pressure sensor of the gas pressure acquisition component is installed on the first wooden board or the second wooden board and is electrically connected to the A / D converter, and the gas generator is installed on the bottom plate; the photoelectric speed sensor and the A / D converter are electrically connected to the single-chip microcomputer respectively; the power supply component is electrically connected to the photoelectric speed sensor, the A / D converter, and the single-chip microcomputer. The present invention is suitable for physical experiments.

Description

Technical Field

[0001] The invention relates to the field of physical experimental devices, in particular to a device for measuring the relationship between pressure and flow rate changes used in experiments. Background Art

[0002] At present, when verifying the relationship between gas pressure and flow rate in physical laboratories, simple experiments are used to qualitatively verify the relationship between the two. Some experiments are simple and easy to operate, and can show good results; while some experiments have the disadvantages of being cumbersome to operate, time-consuming and labor-intensive, and the results are not obvious. In addition, the experimental results are greatly affected by human factors, and it is difficult to obtain the same effect after multiple operations.

[0003] Verifying the relationship between gas pressure and flow rate through existing experiments is a qualitative and abstract description of the relationship between the two, and the entire process requires manual participation and is not easy to operate. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a device for measuring the relationship between pressure and flow rate changes for experiments. The device can be used to quantitatively measure pressure and flow rate, and then intuitively illustrate the relationship between pressure and flow rate changes, so as to solve the problem that the relationship between pressure and flow rate changes is qualitatively and abstractly explained in existing physical experiments, and the entire process requires manual participation and is not easy to operate.

[0005] The embodiment of the present invention provides a device for measuring the relationship between pressure and flow rate changes for experiments, the device comprising: a gas channel, a gas velocity acquisition component, a gas pressure acquisition component, a gas generator, a single chip microcomputer, a liquid crystal display, a real-time clock, and a power supply component;

[0006] The gas channel comprises a first wooden board, a second wooden board, a bottom board and a top board. The first wooden board and the second wooden board are placed in parallel and perpendicular to the bottom board. The bottom board and the top board are placed in parallel to form an inlet and an outlet opposite to each other. The first wooden board and the second wooden board are provided with through holes.

[0007] The gas velocity acquisition assembly includes a bracket, a connecting shaft, a three-cup component, and a photoelectric speed sensor. The connecting shaft passes through a through hole of a first wooden board and a through hole of a second wooden board and is placed on the bracket. The bracket is located outside the gas channel and fixed to the bottom plate. The connecting shaft is installed with a three-cup component and a photoelectric speed sensor. The three-cup component is located in the gas channel. The photoelectric code disk of the photoelectric speed sensor is installed at the end of the connecting shaft. The photoelectric speed sensor is electrically connected to the single-chip microcomputer.

[0008] The gas pressure collection component includes a weighing pressure sensor and an A / D converter. The weighing pressure sensor is installed on the first wooden board or the second wooden board and is located in the gas channel. The weighing pressure sensor is electrically connected to the A / D converter, and the A / D converter is electrically connected to the single-chip microcomputer.

[0009] The gas generator is mounted on the bottom plate, the gas outlet direction of the gas generator is the same as the gas channel direction, the distance between the gas outlet and the bottom plate is equal to the distance between the connecting shaft and the bottom plate, and the gas outlet is located between the first wooden board and the second wooden board;

[0010] The distances between the connecting shaft, the weighing pressure sensor, the gas outlet of the gas generator and the bottom plate are equal;

[0011] The liquid crystal display screen is electrically connected to the single chip computer;

[0012] The power supply component is electrically connected with the photoelectric speed sensor, the A / D converter, the single chip microcomputer, the liquid crystal display screen and the real-time clock.

[0013] According to a specific implementation of the embodiment of the present invention, the first wooden board and the second wooden board are equal in length, width and thickness.

[0014] According to a specific implementation of the embodiment of the present invention, the vertical distance between the first wooden board and the second wooden board is greater than the axial width of the three wind cup components.

[0015] According to a specific implementation of the embodiment of the present invention, the through hole of the first wooden board is at the same position as the through hole of the second wooden board, and the diameter is larger than the diameter of the connecting shaft.

[0016] According to a specific implementation manner of the embodiment of the present invention, the through hole of the first wooden board and the through hole of the second wooden board are respectively located at the center of the first wooden board and the second wooden board.

[0017] According to a specific implementation of the embodiment of the present invention, the length and width of the bottom plate are respectively greater than the length and width of the top plate.

[0018] According to a specific implementation of the embodiment of the present invention, the single chip microcomputer, liquid crystal display, real-time clock, and power supply component are installed on the surface of the first wooden board or the second wooden board and are located outside the gas channel.

[0019] An embodiment of the present invention provides a device for measuring the relationship between experimental pressure and flow rate changes. A gas with a speed generated by a gas generator flows through a gas channel, and a gas speed acquisition component and a gas pressure acquisition component arranged in the gas channel respectively collect gas speed signals and gas pressure signals, and then the collected gas speed signals and pressure signals are input into a single-chip microcomputer, which processes them and displays the results on a liquid crystal display screen. At the same time, a real-time clock displays the real time. The device has a simple structure and is easy to operate. The device can be used to quantitatively measure the pressure value and flow rate value of the fluid. By adjusting the speed at which the gas generator generates gas, multiple groups of pressure values ​​and speed values ​​can be obtained, and then the relationship between pressure and flow rate can be quantitatively and intuitively explained, so as to solve the problem that the relationship between pressure and flow rate changes is qualitatively and abstractly explained in existing physical experiments, and the whole process requires manual participation and is not easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of an embodiment of a device for measuring the relationship between pressure and flow rate changes for an experiment provided by the present invention;

[0022] Figure 2 A schematic diagram of the gas channel structure of an embodiment of a device for measuring the relationship between pressure and flow rate changes for experiments provided by the present invention;

[0023] Figure 3 A schematic diagram of the structure of a gas velocity acquisition component of an embodiment of a device for measuring the relationship between pressure and flow velocity changes for an experiment provided by the present invention;

[0024] Figure 4 A schematic diagram of the structure of a gas pressure collection component of an embodiment of a device for measuring the relationship between pressure and flow rate changes for experiments provided by the present invention;

[0025] Figure 5 A schematic diagram of the gas generator structure of an embodiment of the device for measuring the relationship between pressure and flow rate changes for experiments provided by the present invention. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0027] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] This embodiment provides a device for measuring the relationship between pressure and flow rate changes for experiments, comprising: a gas channel 1, a gas velocity acquisition component 2, a gas pressure acquisition component 3, a gas generator 4, a single chip computer 5, a liquid crystal display 6, a real-time clock 7, and a power supply component 8;

[0029] The gas channel 1 comprises a first wooden board 101, a second wooden board 102, a bottom board 103, and a top board 104. The first wooden board 101 and the second wooden board 102 are placed in parallel and perpendicular to the bottom board 103. The bottom board 103 and the top board 104 are placed in parallel to form an inlet and an outlet in opposite positions. The first wooden board 101 and the second wooden board 102 are provided with a through hole 1011 and a through hole 1021.

[0030] The gas velocity collection assembly 2 includes a bracket 201, a connecting shaft 202, a three-cup component 203, and a photoelectric speed sensor 204. The connecting shaft 202 passes through the through hole 1011 of the first wooden board 101 and the through hole 1012 of the second wooden board 102, and is placed on the bracket 201. The bracket 201 is located outside the gas channel 1 and fixed on the bottom plate 103. The connecting shaft 202 is equipped with the three-cup component 203 and the photoelectric speed sensor 204. The three-cup component 203 is located in the gas channel 1. The photoelectric code disk 2041 of the photoelectric speed sensor 204 is installed at the end of the connecting shaft 202. The photoelectric speed sensor 204 is electrically connected to the single-chip computer 5.

[0031] The gas pressure collection component 3 includes a weighing pressure sensor 301 and an A / D converter 302. The weighing pressure sensor 301 is installed on the first wooden board 101 or the second wooden board 102 and is located in the gas channel 1. The weighing pressure sensor 301 is electrically connected to the A / D converter 302, and the A / D converter 302 is electrically connected to the single-chip computer 5.

[0032] The gas generator 4 is mounted on the bottom plate 103, and the direction of the gas outlet 401 of the gas generator 4 is the same as the direction of the gas channel 1. The distance between the gas outlet 401 and the bottom plate 103 is equal to the distance between the connecting shaft 202 and the bottom plate 103, and the gas outlet 401 is located between the first wooden board 101 and the second wooden board 102;

[0033] The distances between the connecting shaft 202, the weighing pressure sensor 301, the gas outlet 401 of the gas generator 4 and the bottom plate 103 are equal;

[0034] The liquid crystal display screen 6 is connected to the single chip microcomputer 5;

[0035] The power supply component 8 is electrically connected to the photoelectric speed sensor 204 , the A / D converter 302 , the single chip microcomputer 5 , the liquid crystal display screen 6 , and the real-time clock 7 .

[0036] In an embodiment of the present invention, as an optional implementation, the single-chip microcomputer 5 can be a STC89C52 single-chip microcomputer, the liquid crystal display 6 can be an LCD12864 liquid crystal display, the real-time clock 7 can be a DS1302 real-time clock, the A / D converter 302 can be an HX711AD / DA converter, and the measuring range of the weighing pressure sensor 301 can be selected to be 5kg.

[0037] An embodiment of the present invention provides a device for measuring the relationship between pressure and flow rate changes for experiments. A gas with a speed generated by a gas generator 4 flows through a gas channel 1. A gas speed acquisition component 2 and a gas pressure acquisition component 3 arranged in the gas channel 1 respectively collect gas speed signals and gas pressure signals, and then the collected gas speed signals and pressure signals are input into a single-chip microcomputer 5, which processes them and displays the results on a liquid crystal display 6. At the same time, a real-time clock 7 displays the real time. The device has a simple structure and is easy to operate. The device can be used to quantitatively measure the pressure value and flow rate value of the fluid. By adjusting the speed at which the gas generator generates gas, multiple groups of pressure values ​​and speed values ​​can be obtained, and then the relationship between pressure and flow rate can be quantitatively and intuitively explained, so as to solve the problem that the relationship between pressure and flow rate changes is qualitatively and abstractly explained in existing physical experiments, and the whole process requires manual participation and is not easy to operate.

[0038] In the embodiment of the present invention, the length, width and thickness of the first wooden board 101 and the second wooden board 102 are equal, which can make the overall structure of the device more beautiful.

[0039] In the embodiment of the present invention, the vertical distance between the first wooden board 101 and the second wooden board 102 is greater than the axial width of the three-cup component 203, so that when the three-cup component 203 is driven by gas to rotate, it is not affected by the first wooden board 101 and the second wooden board 102 and rotates more flexibly.

[0040] In the embodiment of the present invention, the position of the through hole 1011 of the first wooden board 101 is the same as the position of the through hole 1021 of the second wooden board 102, and the diameter is greater than the diameter of the connecting shaft 202. The position of the through hole 1011 of the first wooden board 101 is the same as the position of the through hole 1021 of the second wooden board 102, so that the connecting shaft 202 can freely pass through the through hole 1011 of the first wooden board 101 and the through hole 1021 of the second wooden board 102, and then be placed on the bracket 201. The position of the through hole 1011 of the first wooden board 101 is the same as the position of the through hole 1021 of the second wooden board 102, and the connecting shaft is perpendicular to the wind direction generated by the gas generator, thereby ensuring that the three-cup component 203 is on the windward side, so that the speed model collected by the photoelectric speed sensor 204 is more accurate.

[0041] In the embodiment of the present invention, the through hole 1011 of the first wooden board 101 and the through hole 1021 of the second wooden board 102 are respectively located at the center of the first wooden board 101 and the second wooden board 102, which are far away from the entrance and exit of the gas channel 1. In this way, the influence of the external environment on the experiment is eliminated, and the corresponding results collected by the gas velocity collection component 2 and the gas pressure collection component 3 are more accurate.

[0042] In the embodiment of the present invention, the length and width of the bottom plate 103 are respectively greater than the length and width of the top plate, so as to facilitate the installation of the bracket 201 and the gas generator 4 on the bottom plate.

[0043] In the embodiment of the present invention, the single chip microcomputer 5, the liquid crystal display screen 6, the real-time clock 7, and the power supply component 8 are installed on the surface of the first wooden board 101 or the second wooden board 102 and are located outside the gas channel 1, so that the device as a whole is more compact.

[0044] The specific usage and functions of this embodiment are as follows:

[0045] The power supply unit is turned on to supply power to the photoelectric speed sensor 204, the weighing pressure sensor 301, the A / D converter 302, the single chip microcomputer 5, the liquid crystal display 6, and the real-time clock 7. The gas generator is started to generate gas with a wind speed of 5 m / s, which flows in from the inlet 105 of the gas channel 1, driving the three wind cup components 203 to rotate, thereby driving the photoelectric code disk 2041 installed at the end of the connecting shaft 202 to rotate synchronously through the connecting shaft 202, and the photoelectric speed sensor 204 transmits the collected signal to the single chip microcomputer 5, which processes the data and displays the processed wind speed value through the liquid crystal display 6.

[0046] When the gas flows through the gas channel 1, the weighing pressure sensor 301 located on the first wooden board 101 or the second wooden board 102 collects the pressure change signal before and after the gas flows, and transmits the signal to the A / D converter 302 for analog-to-digital signal conversion, and then transmits the conversion result to the single-chip microcomputer 5 for data processing, and displays the pressure value obtained by data processing on the LCD screen 6.

[0047] At the same time, the single chip microcomputer 5 controls the real-time clock 7 to display the real-time time on the liquid crystal display screen 6, so that the experiment participants can record the time information such as year, month, day, hour, minute, and second of the operation experiment in real time.

[0048] By adjusting the speed at which the gas generator generates gas and conducting experiments according to the above usage, multiple sets of pressure and speed values ​​can be obtained, and then a pressure and flow rate change relationship curve can be drawn. The following conclusions can be drawn from the pressure and flow rate change relationship curve: ① The greater the gas flow rate, the lower the pressure. ② The lower the gas flow rate, the greater the pressure.

[0049] In this embodiment, the pressure and flow velocity variation relationship measurement device provided by the present invention can quantitatively measure multiple sets of pressure and flow velocity values, and a two-dimensional curve of pressure and pressure is plotted according to multiple sets of pressure and flow velocity values, and the variation relationship between pressure and flow velocity can be summarized through the curve. The device can quantitatively and intuitively illustrate the variation relationship between pressure and flow velocity, and the device has a simple structure and is easy to operate.

[0050] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A device for measuring the relationship between pressure and flow rate for experiments, characterized in that: The device comprises: a gas channel, a gas velocity acquisition component, a gas pressure acquisition component, a gas generator, a single chip microcomputer, LCD display, real-time clock, power supply components; The gas channel comprises a first wooden board, a second wooden board, a bottom board, and a top board. The first wooden board and the second wooden board are placed in parallel and perpendicular to the bottom board. The bottom board and the top board are placed in parallel to form an inlet and an outlet in opposite positions. The first wooden board and the second wooden board are provided with through holes. The through holes of the first wooden board and the through holes of the second wooden board are respectively located at the center of the first wooden board and the second wooden board. The gas velocity acquisition assembly includes a bracket, a connecting shaft, a three-cup component, and a photoelectric speed sensor. The connecting shaft passes through a through hole of a first wooden board and a through hole of a second wooden board and is placed on the bracket. The bracket is located outside the gas channel and fixed to the bottom plate. The connecting shaft is installed with a three-cup component and a photoelectric speed sensor. The three-cup component is located in the gas channel. The photoelectric code disk of the photoelectric speed sensor is installed at the end of the connecting shaft. The photoelectric speed sensor is electrically connected to the single-chip microcomputer. The gas pressure collection component includes a weighing pressure sensor and an A / D converter. The weighing pressure sensor is installed on the first wooden board or the second wooden board and is located in the gas channel. The weighing pressure sensor is electrically connected to the A / D converter, and the A / D converter is electrically connected to the single-chip microcomputer. The gas generator is mounted on the bottom plate, the gas outlet direction of the gas generator is the same as the gas channel direction, the distance between the gas outlet and the bottom plate is equal to the distance between the connecting shaft and the bottom plate, and the gas outlet is located between the first wooden board and the second wooden board; The distances between the connecting shaft, the weighing pressure sensor, the gas outlet of the gas generator and the bottom plate are equal; The liquid crystal display screen is electrically connected to the single chip computer; The power supply component is electrically connected to the photoelectric speed sensor, the A / D converter, the single chip microcomputer, the liquid crystal display screen, and the real-time clock; Wherein, the first wooden board and the second wooden board are equal in length, width and thickness.

2. The device for measuring the relationship between pressure and flow rate changes for experiments according to claim 1, characterized in that: The vertical distance between the first wooden board and the second wooden board is greater than the axial width of the three wind cup components.

3. The device for measuring the relationship between pressure and flow rate changes for experiments according to claim 1 or 2, characterized in that: The through hole of the first wooden board is located at the same position as the through hole of the second wooden board, and has a diameter greater than that of the connecting shaft.

4. The device for measuring the relationship between pressure and flow rate changes for experiments according to claim 1, characterized in that: The length and width of the bottom plate are respectively greater than the length and width of the top plate.

5. The device for measuring the relationship between pressure and flow rate changes for experiments according to claim 1, characterized in that: The single chip microcomputer, liquid crystal display screen, real-time clock and power supply components are installed on the surface of the first wooden board or the second wooden board and are located outside the gas channel.

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