Quantitative analysis Ampere force measuring and calculating instrument

Abstract

The utility model provides a quantitative analysis Ampere force measuring and calculating instrument which comprises a machine base, and a magnet guide rail, two strong magnets, a rotating motor, a controllable coil assembly, a pressure sensor, a Hall sensor, a central control module, a display screen and a constant current source module are installed on the machine base. The two strong magnets are opposite to each other and are respectively mounted on the magnet guide rails in a sliding manner; an output shaft of the rotating motor is located between the two strong magnets and provided with a rotating disc. The controllable coil assembly is installed on the rotating disc and located between the two strong magnets, and a plurality of binding posts are arranged on the controllable coil assembly. The pressure sensor is mounted between the turntable and the controllable coil group; the Hall sensor is installed on the controllable coil assembly. According to the measuring and calculating instrument, a measuring mode of a traditional tension sensing system is replaced by a measuring mode of the pressure sensor, so that not only can the tension be measured, but also the pressure can be measured, the measuring accuracy is improved, and the quantitative relationship between the ampere force and each parameter can be more accurately and quantitatively analyzed.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical teaching, in particular to a quantitative analysis Ampere force measuring instrument. Background Art

[0002] Ampere force is the force on a current-carrying wire in a magnetic field. Ampere force is an important knowledge point in high school physics and university physics, but in high school physics teaching, most of them are just simple qualitative demonstration experiments, while in university physics, they are more inclined to theoretical derivation. Students lack the process of quantitative exploration and can only perceive qualitatively. Quantitative analysis of Ampere force helps to deeply understand electromagnetic phenomena, guide the design and optimization of electromagnetic equipment, etc., which is of great significance to the fields of electromagnetism and engineering.

[0003] At present, the Ampere force demonstrator is a commonly used instrument for exploring the Ampere force experiment. For example, the Chinese invention patent with publication number CN 109949670A provides a quantitative exploration of the Ampere force size demonstrator. The demonstrator can collect force conditions through mechanical sensors, current sensors collect current size, magnetic sensors collect magnetic field data, and angle sensors collect angle parameters. By adjusting the terminal of the coil connected to the circuit, the length of the energized wire is changed; the distance between the first sliding seat and the second sliding seat is adjusted to change the magnetic field size; the turntable is rotated to change the angle; all data can be quantitatively explored, and the influencing factors affecting the Ampere force size can be easily changed, and the changes in the Ampere force size can be clearly reflected. This solves the problem that when the existing laboratory instruments are conducting experiments to explore the Ampere force, the instruments are still limited to qualitative exploration or insufficient exploration, and cannot clearly reflect the change process of the Ampere force with its influencing factors. However, the demonstrator measures the size of the Ampere force through a tension system. Due to the magnetic torque of the Ampere force, the coil is easy to twist, and the gravity and the tension cannot be in a straight line, resulting in low measurement accuracy. This problem exists not only in the demonstrator, but also in existing technologies such as an Ampere force quantitative demonstrator provided by the Chinese utility model patent with application number CN202120328246.7, an Ampere force demonstration device provided by the utility model patent CN202221023473.X, a digital Ampere force demonstration device provided by the utility model patent CN202020139595.X, and an Ampere force demonstrator for physics teaching provided by the Chinese utility model patent CN202121298490.X. Therefore, the existing Ampere force demonstrator still needs further improvement. Utility Model Content

[0004] In view of the above, it is necessary to provide a quantitative analysis Ampere force measuring instrument, which adopts the pressure sensor measurement method instead of the traditional tension sensor system measurement method, so that the measurement can not only measure tension but also pressure, thereby improving the measurement accuracy, so as to more accurately quantitatively analyze the quantitative relationship between Ampere force and various parameters.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0006] The quantitative analysis Ampere force measuring instrument comprises a base, on which is mounted a

[0007] Magnet guides;

[0008] Two strong magnets, facing each other, are slidably mounted on magnet guide rails respectively;

[0009] A rotating motor, wherein the output shaft of the rotating motor is located between two strong magnets, the rotation axis of the output shaft is perpendicular to the sliding track line of the magnet guide rail, and a rotating disk is installed on the output shaft;

[0010] A controllable coil group is installed on the turntable and located between two strong magnets, and a plurality of terminals are provided on the controllable coil group;

[0011] A pressure sensor is installed between the rotating disk and the controllable coil group;

[0012] A Hall sensor is mounted on the controllable coil group;

[0013] A central control module, connected to the rotating motor, the pressure sensor, and the Hall sensor respectively;

[0014] Display screen, connected to the central control module;

[0015] The constant current source module is connected to the central control module and the controllable coil group respectively.

[0016] Preferably, two magnet guide rails are provided, each strong magnet is connected to the two magnet guide rails, and the output shaft of the rotating motor is located between the two magnet guide rails.

[0017] Preferably, the rotary motor is a stepper motor, which is connected to the central control module via a driver.

[0018] Preferably, the display screen is a liquid crystal display screen.

[0019] Preferably, the constant current source module comprises a constant current power supply, a current sensor, and a voltage sensor. The constant current power supply is connected to the controllable coil group via the current sensor and the voltage sensor. The current sensor and the voltage sensor are respectively connected to the central control module.

[0020] Preferably, the constant current source module further includes a constant current display, and the constant current display is connected to the central control module.

[0021] Preferably, the pressure sensor is an HX711 pressure sensor.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The utility model adjusts the angle between the current direction and the magnetic induction direction by driving the controllable coil group to rotate by a rotating motor, and the adjustment is relatively accurate; secondly, the controllable coil group is connected to the rotating motor through a turntable, and can rotate with the rotating motor. While adjusting the angle, due to the arrangement of the pressure sensor on the turntable, it can measure both the tension and the pressure, thereby expanding the measurement method and further illustrating the direction of the Ampere force generated in the experimental process. Compared with the measurement method of the traditional tension sensor system, this method does not have the defect problem that the coil is easy to twist due to suspension, and the only shortcoming is the direction of the measured force; furthermore, the controllable coil group has a plurality of terminals, which can change the length of the energized wire and quantitatively analyze the relationship between the Ampere force and the wire length; in addition, the strong magnet of the utility model is slidable and can adjust the distance relative to the controllable coil group, thereby changing the magnetic induction intensity and quantitatively studying the relationship between the Ampere force and the magnetic induction intensity.

[0024] In summary, the measuring instrument of the utility model can quantitatively analyze the quantitative relationship between Ampere force and parameters such as current intensity, magnetic induction intensity, wire length, angle between current direction and magnetic induction direction, and can quantitatively analyze the direction of Ampere force. It has high measurement accuracy and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0026] Figure 2 It is a front view of the utility model.

[0027] Main component symbols

[0028] In the figure: base 1, magnet guide rail 2, strong magnet 3, rotating motor 4, turntable 5, adjustable coil group 6, pressure sensor 7, Hall sensor 8, display screen 9, constant current power supply 10.

[0029] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0030] See also Figure 1-2 In a preferred embodiment of the present utility model, the quantitative analysis Ampere force measuring instrument comprises a base 1, on which is mounted:

[0031] The magnet guide rail 2 serves as a track for the directional sliding of the strong magnet 3, plays a role in stabilizing and supporting the strong magnet 3, and at the same time ensures that the two magnets are parallel to each other, thereby forming an approximately uniform magnetic field.

[0032] Two strong magnets 3 are opposite to each other and are slidably mounted on the magnet guide rail 2 respectively; the two strong magnets 3 can slide on the magnet guide rail 2, so that the magnetic induction intensity can be changed by adjusting the distance between the two strong magnets 3, and the Ampere force and the magnetic induction intensity can be quantitatively studied.

[0033] The output shaft of the rotating motor 4 is located between the two strong magnets 3, and the rotation axis of the output shaft is perpendicular to the sliding track line of the magnet guide rail 2. A turntable 5 is installed on the output shaft. Preferably, the rotating motor 4 is a stepper motor, which is connected to the central control module mentioned later through a driver. In this way, the central control module can make the rotating part rotate in an accurate and controllable manner by controlling the pulse number and direction of the stepper motor 4, so that the Ampere force calculator of the utility model can calculate the value of the measured Ampere force by changing different rotation degrees, ensuring the accuracy and reliability of the measurement results of the Ampere force calculator; and the driver is used to control the rotation speed, direction and acceleration of the motor 4 to meet different needs, so as to finely control the motor 4 according to different motion requirements and achieve accurate power output and execution.

[0034] The controllable coil group 6 is mounted on the turntable 5 and is located between the two strong magnets 3. The controllable coil group 6 is provided with a plurality of terminals. The controllable coil group 6 rotates when the turntable 5 rotates with the rotating motor 4, thereby adjusting the angle between the controllable coil group 6 and the strong magnet 3, that is, adjusting the angle between the current direction and the magnetic induction direction. In the utility model, the controllable coil group 6 has a plurality of negative terminals for connecting coils with different numbers of turns, thereby adjusting the length of the current-carrying wire and realizing quantitative analysis of the relationship between different wire lengths and the Ampere force.

[0035] The pressure sensor 7 is installed between the turntable 5 and the controllable coil group 6. It measures the mass of the object through the strain, thereby determining the size of the Ampere force, breaking the tradition of measuring instruments using tension sensors for measurement, and solving the defect problem that the coil is easy to twist when the traditional tension measurement system uses tension to measure the Ampere force, and the direction of the measured force is unique. Since the utility model uses the pressure sensor 7 for measurement, after the pressure sensor 7 is connected to the controllable coil group 6, it can measure both tension and pressure, thereby expanding the measurement range and further explaining the direction of the Ampere force. In this embodiment, the pressure sensor 7 is an HX711 pressure sensor 7, which is composed of a binary analog-to-digital converter (ADC) and an amplifier. The module uses a 24-bit high-precision A / D converter chip HX711.

[0036] The Hall sensor 8 is mounted on the controllable coil group 6 and is used to detect the presence and strength of the magnetic field. Specifically, the Hall sensor 8 can measure the current passing through the wire and detect the magnetic field around the wire through the Hall effect. When the current passes through the wire, a magnetic field is generated around the wire. The Hall sensor 8 can measure the strength of this magnetic field and convert it into a corresponding voltage value; by measuring the voltage output by the Hall sensor 8, the magnitude of the Ampere force can be indirectly measured, so that the measuring instrument of the utility model can intuitively display the interaction between the current and the magnetic field, and use a numerical value to represent the magnitude of the Ampere force, that is, it provides a quantitative measurement of the Ampere force.

[0037] The central control module is connected to the rotating motor 4, the pressure sensor 7, and the Hall sensor 8 respectively. It is a master control unit that can centrally collect and process various parameters and issue control instructions.

[0038] The display screen 9 is connected to the central control module and is used to display the experimental data in real time. Preferably, the display screen 9 is a liquid crystal display screen 9, which can not only display data information, but also be used as a control function key. Furthermore, the central control module is externally connected to a voltage stabilizing module to reduce the voltage so that the liquid crystal display screen 9 can operate stably.

[0039] The constant current source module is connected to the central control module and the controllable coil group 6 respectively, and is used to provide a constant current to ensure that the utility model obtains a stable current signal during the measurement process. Preferably, the constant current source module includes a constant current power supply 10, a current sensor, and a voltage sensor. The constant current power supply 10 is connected to the controllable coil group 6 through the current sensor and the voltage sensor, and the current sensor and the voltage sensor are connected to the central control module respectively. Among them, the constant current power supply 10 can provide a constant current output, thereby reducing errors and measurement uncertainties, and improving the accuracy and reliability of the measurement. At the same time, the constant current power supply 10 usually has the function of adjusting the current range, and the output current can be adjusted according to the actual measurement requirements. In addition, the constant current power supply 10 has built-in protection functions, such as overload protection, short circuit protection, etc., which can effectively protect the Ampere force meter and the measured circuit from damage due to excessive current or short circuit. The current sensor is used to measure the current generated during the experiment, and the voltage sensor is used to measure the voltage. The obtained current and voltage information are transmitted to the central control module, and the central control module can control the display screen 9 for display. Of course, an additional display may be provided for separate display, such as the constant current display provided in this embodiment, wherein the constant current display is connected to the central control module.

[0040] Therefore, through the setting of the above modules, the Ampere force measuring instrument of the utility model can quantitatively analyze the quantitative relationship between Ampere force and parameters such as current intensity, magnetic induction intensity, wire length, angle between current direction and magnetic induction direction, and has good measurement effect and high accuracy.

[0041] Finally, it is necessary to further explain that in this embodiment, two magnet rails 2 are provided, each strong magnet 3 is connected to two magnet rails 2, and the output shaft of the rotating motor 4 is located between the two magnet rails 2 to improve the stability of the installation of the strong magnet 3. Furthermore, the strong magnet 3 is installed on the magnet rail 2 through a magnet mounting seat.

[0042] The above description is a detailed description of the preferred feasible embodiment of the utility model, but the embodiment is not used to limit the scope of the patent application of the utility model. All equivalent changes or modified changes completed under the technical spirit suggested by the utility model should fall within the patent scope covered by the utility model.

Claims

1. A quantitative analysis ampere force measuring instrument, comprising a base, characterized in that: The base is equipped with Magnet guides; Two strong magnets, facing each other, are slidably mounted on magnet guide rails respectively; A rotating motor, wherein the output shaft of the rotating motor is located between two strong magnets, the rotation axis of the output shaft is perpendicular to the sliding track line of the magnet guide rail, and a rotating disk is installed on the output shaft; A controllable coil group is installed on the turntable and located between two strong magnets, and a plurality of terminals are provided on the controllable coil group; A pressure sensor is installed between the rotating disk and the controllable coil group; A Hall sensor is mounted on the controllable coil group; A central control module, connected to the rotating motor, the pressure sensor, and the Hall sensor respectively; Display screen, connected to the central control module; The constant current source module is connected to the central control module and the controllable coil group respectively.

2. The quantitative analysis Ampere force calculator according to claim 1, characterized in that: Two magnet guide rails are provided, each strong magnet is connected to the two magnet guide rails, and the output shaft of the rotating motor is located between the two magnet guide rails.

3. The quantitative analysis Ampere force calculator according to claim 1, characterized in that: The rotating motor is a stepping motor, which is connected to the central control module through a driver.

4. The quantitative analysis Ampere force calculator according to claim 1, characterized in that: The display screen is a liquid crystal display screen.

5. The quantitative analysis Ampere force calculator according to claim 1, characterized in that: The constant current source module includes a constant current power supply, a current sensor, and a voltage sensor. The constant current power supply is connected to a controllable coil group via the current sensor and the voltage sensor. The current sensor and the voltage sensor are respectively connected to a central control module.

6. The quantitative analysis Ampere force calculator according to claim 5, characterized in that: The constant current source module also includes a constant current display, and the constant current display is connected to the central control module.

7. The quantitative analysis Ampere force calculator according to claim 1, characterized in that: The pressure sensor is an HX711 pressure sensor.

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