CN220339478U - Magnetic levitation sensing electronic scale - Google Patents
Magnetic levitation sensing electronic scale Download PDFInfo
- Publication number
- CN220339478U CN220339478U CN202322051020.9U CN202322051020U CN220339478U CN 220339478 U CN220339478 U CN 220339478U CN 202322051020 U CN202322051020 U CN 202322051020U CN 220339478 U CN220339478 U CN 220339478U
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- connecting shaft
- scale pan
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- base
- magnet
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- 238000005339 levitation Methods 0.000 title claims abstract description 14
- 230000000712 assembly Effects 0.000 claims abstract description 11
- 238000000429 assembly Methods 0.000 claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims description 17
- 230000005484 gravity Effects 0.000 claims description 8
- 238000005303 weighing Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 239000000725 suspension Substances 0.000 abstract 1
- 101150006573 PAN1 gene Proteins 0.000 description 24
- 230000005389 magnetism Effects 0.000 description 2
- 230000005483 Hooke's law Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The utility model discloses a magnetic levitation sensing electronic scale, which comprises: a scale pan; the base is positioned below the scale pan, and a through hole is formed in the upper surface of the base; the first end of the connecting shaft is inserted into the through hole in a sliding manner, and the second end of the connecting shaft is fixedly connected with the bottom of the scale pan; a plurality of electromagnetic assemblies for providing electromagnetic force opposite to a gravitational direction; the control module is arranged on the upper surface of the base and is electrically connected with the electrified coil, and the control module is used for controlling and changing the current in the electrified coil when the scale pan bears a weighed object so that the connecting shaft slides in the through hole and drives the scale pan to return to an initial position; the indicator is electrically connected with the control module and is used for calculating and displaying the weight of a weighed object, and the indicator adopts a magnetic suspension structure, is convenient to calibrate, avoids the defect of poor consistency of a traditional spring piece and improves weighing precision.
Description
Technical Field
The utility model relates to the technical field of weighing equipment, in particular to a magnetic levitation sensing electronic scale.
Background
The electronic scale is a tool for measuring the mass of an object by utilizing the Hooke's law or the lever balance principle of force, and mainly comprises a bearing system, a force transmission conversion system and a value indicating system.
Disclosure of Invention
The utility model aims to provide a magnetic levitation sensing electronic scale which adopts a magnetic levitation structure, is convenient to calibrate, avoids the defect of poor consistency of a traditional spring piece, and improves weighing precision.
The utility model provides a magnetic levitation sensing electronic scale, which comprises:
a scale pan;
the base is positioned below the scale pan, and a through hole is formed in the upper surface of the base;
the first end of the connecting shaft can be longitudinally movably inserted into the through hole, a containing space for the connecting shaft to be inserted is formed in the base, and the second end of the connecting shaft is fixedly connected with the bottom of the scale pan;
the electromagnetic assemblies are used for providing electromagnetic force opposite to the gravity direction, the electromagnetic assemblies are arranged on the upper surface of the base, the electromagnetic assemblies comprise energized coils and magnets, the energized coils are arranged on the periphery of the magnets, and the electromagnetic force is generated between the magnets and the energized coils in the direction opposite to the gravity direction;
the control module is arranged in the accommodating space and is electrically connected with the electrified coil, and the control module is used for controlling and changing the current in the electrified coil when the scale pan bears a weighed object so that the connecting shaft moves in the through hole and drives the scale pan to return to an initial position;
the indicator is electrically connected with the control module and is used for calculating and displaying the weight of the weighed object.
The weight of the scale pan and the weighed object is downward, current passes through the energized coil to generate an upward electromagnetic force, and in the initial state, the electromagnetic force is enabled to flow through the energized coil by proper current, so that the electromagnetic force is exactly equal to the weight of the scale pan, the balance state is achieved, when the weighed object is borne on the scale pan, the connecting shaft moves downward, the current of the energized coil is changed through the control module until the scale pan returns to the initial position, the current of the indicator is calculated in proportion to the mass of the weighed object through the energized coil, and finally the mass of the object is displayed in a digital mode.
Further, the device also comprises a displacement sensor electrically connected with the control module, wherein the displacement sensor is installed in the accommodating space and is used for measuring the vertical displacement change of the connecting shaft.
When the connecting shaft slides downwards, the displacement sensor detects a displacement signal and transmits the displacement signal to the control module to change the current in the energizing coil.
Further, the number of the electromagnetic assemblies is multiple, the electromagnetic assemblies are symmetrically arranged around the connecting shaft in a surrounding mode, and the energizing coil and the magnet are sequentially arranged around the connecting shaft in an outwards surrounding mode.
Further, the magnet is a permanent magnet.
The permanent magnet has wide hysteresis loop, high coercive force and high remanence, and can keep constant magnetism after magnetization, thus the service life of the permanent magnet can be prolonged.
Further, a mounting plate is fixed on the base, a connecting hole corresponding to the through hole is formed in the mounting plate, the connecting shaft sequentially penetrates through the connecting hole and the through hole, and the energizing coil and the magnet are mounted on the mounting plate.
Drawings
FIG. 1 is a schematic structural diagram of a magnetic levitation sensing electronic scale according to an embodiment of the present utility model;
fig. 2 is a schematic view illustrating installation of an electromagnetic assembly according to an embodiment of the present utility model.
In the figure, 1-scale pan; 2-a base; 3-through holes; 4-connecting shafts; 5-accommodating space; 6-an electromagnetic assembly; 61-energizing the coil; 62-magnet; 7-a control module; 8-a displacement sensor; 9-mounting plate.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
Referring to fig. 1, the present utility model shows a magnetic levitation sensing electronic scale comprising:
a scale 1;
the base 2 is positioned below the scale pan 1, and a through hole 3 is formed in the upper surface of the base 2;
the first end of the connecting shaft 4 is longitudinally movably inserted into the through hole 3, an accommodating space 5 for inserting the connecting shaft 4 is formed in the base 2, and the second end of the connecting shaft 4 is fixedly connected with the bottom of the scale pan 1;
a plurality of electromagnetic assemblies 6 for providing electromagnetic force opposite to the gravity direction, wherein the electromagnetic assemblies 6 are arranged on the upper surface of the base 2, the electromagnetic assemblies 6 comprise a power-on coil 61 and a magnet 62 which are arranged on the upper surface of the base 2, and the electromagnetic force direction generated between the magnet 62 and the power-on coil 61 is opposite to the gravity direction;
the control module 7 is arranged in the accommodating space 5 and is electrically connected with the power-on coil 61, and the control module 7 is used for controlling and changing the current in the power-on coil 61 when the scale pan 1 bears a weighed object so that the connecting shaft 4 moves in the through hole 3 and drives the scale pan 1 to return to the initial position;
the value indicator is electrically connected with the control module 7 and is used for calculating and displaying the weight of the weighed object.
The weight of the scale pan 1 and the object to be weighed is downward, current flows through the energized coil 61 to generate an upward electromagnetic force, and in the initial state, the current flows through the energized coil 61 with proper current to enable the generated electromagnetic force to be exactly equal to the weight of the scale pan 1, when the scale pan 1 carries the object to be weighed, the connecting shaft 4 moves downward, the current of the energized coil 61 is changed through the control module 7 until the scale pan 1 returns to the initial position, the current of the energized coil 61 is proportional to the mass of the object to be weighed through the indicator, and finally the mass of the object is displayed in a digital mode.
Specifically, the energizing coil 61 and the magnet 62 are mounted with the following:
the N pole of the magnet 62 faces the energizing coil 61 and the direction of the current in the energizing coil 61 is counterclockwise, and at this time, the direction of the electromagnetic force, i.e., ampere force, is vertically upward;
the S pole of the magnet 62 faces the energizing coil 61 and the direction of the current in the energizing coil 61 is clockwise, and at this time, the direction of the electromagnetic force, that is, the ampere force is vertically upward.
The principle of the above process is that the electromagnetic force f=nilb, where n is the number of turns of the energized coil 61, I is the current in the energized coil 61, L is the length of the wire perpendicular to the magnetic field direction, B is the magnetic induction intensity, in the present utility model, n, L and B are fixed values, assuming that in the initial state, i.e. when the scale pan 1 is not being weighed, the weight of the scale pan 1 itself is m1, the current in the energized coil 61 is I1, the electromagnetic force is equivalent to the weight of the scale pan 1 itself, i.e. f1= n I1 lb=m1g, when the scale pan 1 carries the weighed object, assuming that the weight of the weighed object is m2, the connecting axis slides vertically downward, as known from the above electromagnetic force formula, the electromagnetic force F is proportional to the current I, so that by using the control module 7, the current I1 in the energized coil 61 is changed, the electromagnetic force F1 is increased to F2, at this time the scale pan 1 returns to the initial position, at this time the current I1 in the energized coil 61 is increased to be I2, i.e. f2= n I = (m1+m2+m2) and the combined with the weight of the scale pan 1=m2 is calculated, i=522, and the combined weight is known as the weight of the weighed object is calculated as m=522.
Specifically, a calculating module is installed in the indicator for calculating the weight of the object to be weighed, the indicator is electrically connected with the control module 7, and after the data of n, I1, I2, L, m, B and the like are obtained, the final indicator for calculating the weight of the object to be weighed is automatically calculated and displayed in a numerical form.
The device further comprises a displacement sensor 8 electrically connected with the control module 7, wherein the displacement sensor 8 is arranged in the accommodating space 5 and is used for measuring the vertical displacement change of the connecting shaft 4.
In particular, displacement sensors include, but are not limited to, photoelectric sensors, inductive sensors, and the like.
When the connecting shaft 4 slides downwards, the displacement sensor 8 detects the displacement signal and transmits it to the control module 7 and changes the current in the energized coil 61, so that a subsequent mass calculation is performed.
The placement positions of the magnet 62 and the energizing coil 61 are various, and referring to fig. 2, the energizing coil 61 and the magnet 62 may be sequentially and externally arranged around the connecting shaft 4 from the connecting shaft 4.
The magnet 62 is a permanent magnet 62.
The permanent magnet 62 has a wide hysteresis loop, a high coercive force, and a high remanence, and can be a material that retains constant magnetism once magnetized, thereby improving the service life of the present utility model.
A mounting plate 9 is fixed on the base 2, a connecting hole corresponding to the through hole 3 is formed in the mounting plate 9, the connecting shaft 4 sequentially penetrates through the connecting hole and the through hole 3, and the energizing coil 61 and the magnet 62 are mounted on the mounting plate 9.
The principle of the utility model is as follows:
the gravity of the scale pan 1 and the weighed object is downward, current flows through the energized coil 61 to generate an upward electromagnetic force, and in the initial state, the current flows through the energized coil 61 with proper current to enable the generated electromagnetic force to be exactly equal to the gravity of the scale pan 1, when the scale pan 1 bears the weighed object, the connecting shaft 4 moves downward, the current of the energized coil 61 is changed through the control module 7 until the scale pan 1 returns to the initial position, the current of the energized coil 61 is directly proportional to the mass of the weighed object through the indicator, and finally the mass of the object is displayed in a digital mode;
in the present utility model, n, L and B are fixed values, and it is assumed that in an initial state, i.e., when the scale pan 1 is not being weighed, the weight of the scale pan 1 itself is m1, the current in the power coil 61 is I1, the electromagnetic force is equivalent to the weight of the scale pan 1 itself, i.e., f1= n I1lb=m1g, when the scale pan 1 carries a weighed object, i.e., f1=527lb=m1g, the weight of the weighed object is assumed to be m2, the connecting shaft slides vertically downward, as known from the above electromagnetic force formula, the electromagnetic force F is proportional to the current I, so that the electromagnetic force F1 is increased to F2 by changing the current I1 in the power coil 61 by using the control module 7, at this time, the current I1 in the power coil 61 is increased to I2, i.e., f2=622lb=m1+m2 g, and in an initial state, F1=6283, i.e., the combined with n=m1, i.e., the weight of the scale pan 1=622g, is calculated, and the weight of the weighed object is known as a combination of the weight of the scale pan 1=527m1.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be comprehended within the scope of the present application.
Claims (5)
1. A magnetic levitation sensing electronic scale, comprising:
a scale pan;
the base is positioned below the scale pan, and a through hole is formed in the upper surface of the base;
the first end of the connecting shaft can be longitudinally movably inserted into the through hole, a containing space for the connecting shaft to be inserted is formed in the base, and the second end of the connecting shaft is fixedly connected with the bottom of the scale pan;
the electromagnetic assembly is used for providing electromagnetic force opposite to the gravity direction for the scale pan and is arranged on the upper surface of the base, and comprises an electrified coil and a magnet which are arranged on the upper surface of the base, wherein the magnet is arranged on the periphery of the electrified coil, and the electromagnetic force direction is opposite to the gravity direction between the magnet and the electrified coil;
the control module is arranged in the accommodating space and is electrically connected with the electrified coil, and the control module is used for controlling and changing the current in the electrified coil when the scale pan bears a weighed object so that the connecting shaft moves in the through hole and drives the scale pan to return to an initial position;
the value indicator is electrically connected with the control module and is used for calculating and displaying the weight of the weighed object.
2. The magnetic levitation sensing electronic scale of claim 1, further comprising a displacement sensor electrically connected to the control module, the displacement sensor being mounted in the accommodating space, the displacement sensor being configured to measure a vertical displacement change of the connecting shaft.
3. The magnetic levitation sensing electronic scale according to claim 1, wherein the number of the electromagnetic assemblies is plural, the electromagnetic assemblies are symmetrically arranged around the connecting shaft, and the energizing coil and the magnet are sequentially arranged around the connecting shaft in an outward annular manner from the connecting shaft.
4. A magnetic levitation sensor electronic scale according to claim 1 or 3, wherein the magnet is a permanent magnet.
5. The magnetic levitation sensing electronic scale according to claim 3, wherein a mounting plate is fixed on the base, a connection hole corresponding to the through hole is formed in the mounting plate, the connection shaft sequentially penetrates through the connection hole and the through hole, and the energizing coil and the magnet are mounted on the mounting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322051020.9U CN220339478U (en) | 2023-08-02 | 2023-08-02 | Magnetic levitation sensing electronic scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322051020.9U CN220339478U (en) | 2023-08-02 | 2023-08-02 | Magnetic levitation sensing electronic scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220339478U true CN220339478U (en) | 2024-01-12 |
Family
ID=89444269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322051020.9U Active CN220339478U (en) | 2023-08-02 | 2023-08-02 | Magnetic levitation sensing electronic scale |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220339478U (en) |
-
2023
- 2023-08-02 CN CN202322051020.9U patent/CN220339478U/en active Active
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