CN116184283A - Magnetic field system with adjustable magnetic field direction for magnetocaloric effect measuring instrument and adjusting method - Google Patents
Magnetic field system with adjustable magnetic field direction for magnetocaloric effect measuring instrument and adjusting method Download PDFInfo
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- CN116184283A CN116184283A CN202211618800.0A CN202211618800A CN116184283A CN 116184283 A CN116184283 A CN 116184283A CN 202211618800 A CN202211618800 A CN 202211618800A CN 116184283 A CN116184283 A CN 116184283A
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- magnetic field
- magnet
- servo motor
- magnetocaloric effect
- angular displacement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0023—Electronic aspects, e.g. circuits for stimulation, evaluation, control; Treating the measured signals; calibration
- G01R33/0041—Electronic aspects, e.g. circuits for stimulation, evaluation, control; Treating the measured signals; calibration using feed-back or modulation techniques
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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- Condensed Matter Physics & Semiconductors (AREA)
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Abstract
The invention discloses a magnetic field system with adjustable magnetic field direction for a magnetocaloric effect measuring instrument and an adjusting method, wherein the magnetic field system with adjustable magnetic field direction for the magnetocaloric effect measuring instrument comprises the following components: the device comprises a magnet, an angle dial, a servo motor, a synchronous belt, a motor driver and an upper computer; the magnet is cylindrical, two ends of the magnet are respectively provided with a rotating shaft, and the rotating shafts are arranged in the supporting seat; a hollow cylindrical magnetic field space is arranged in the middle of the magnet; the angle dial is arranged at the outer side of the magnet, and the synchronous belt is arranged between the rotating shaft of the servo motor and the outer wall of the magnet; the servo motor is connected with a motor driver through a cable, and the motor driver is connected with the upper computer through a signal wire; the motor driver is used for converting an instruction sent by the upper computer into an angular displacement signal and sending the angular displacement signal to the servo motor, and the servo motor rotates according to the angular displacement signal to drive the magnet to rotate to a set angle. According to the invention, the magnetic field direction is accurately regulated, so that the magnetocaloric effect measuring instrument can measure the magnetocaloric effect of the sample in different magnetic field directions.
Description
Technical Field
The invention belongs to the technical field of room temperature magnetic refrigeration, and particularly relates to a magnetic field system with an adjustable magnetic field direction for a magnetocaloric effect measuring instrument and an adjusting method.
Background
The room temperature magnetic refrigeration is a solid refrigeration technology, and is a novel refrigeration technology hopeful to replace the traditional gas compression refrigeration technology. With the development of new materials and new technologies, the development of room temperature magnetic refrigeration technology has been generally emphasized and has made great progress in recent decades. The room temperature magnetic refrigeration technology meets the current sustainable development time requirement and is considered as a green refrigeration technology hopefully replacing the traditional refrigeration technology. The refrigerating medium used by the room temperature magnetic refrigerator is a solid material, the parameters for measuring the magnetic thermal property of the material are isothermal magnetic entropy change and adiabatic temperature change, and the common measuring method is divided into a direct measuring method and an indirect measuring method; indirect measurement is generally time-consuming and has high measurement cost, and direct measurement is quick and convenient and has low measurement cost.
With the continuous intensive research of magnetic refrigeration technology, in particular, room temperature magnetic refrigerators, magnetic refrigeration working media such as sheets and plates are being widely used in magnetic refrigerators. At present, a magnetic field system for a room temperature magneto-caloric effect measuring instrument is usually fixedly installed, so that the angle of the magnetic field direction is inconvenient to adjust, the magnetic field direction has little influence on measurement for a block sample, and the magnetic field direction has great influence on measurement for a sheet-shaped or plate-shaped sample, so that magneto-caloric effect values of samples in different magnetic field directions cannot be measured.
Disclosure of Invention
The invention aims to provide a magnetic field system with an adjustable magnetic field direction for a magnetocaloric effect measuring instrument and an adjusting method, and the magnetocaloric effect measuring instrument can realize the measurement of the magnetocaloric effect of samples in different magnetic field directions by accurately adjusting the magnetic field direction.
In order to achieve the above purpose, the technical solution adopted by the invention is as follows:
a magnetic field system with adjustable magnetic field direction for a magnetocaloric effect measuring instrument, comprising: the device comprises a magnet, an angle dial, a servo motor, a synchronous belt, a motor driver and an upper computer; the magnet is cylindrical, two ends of the magnet are respectively provided with a rotating shaft, and the rotating shafts are arranged in the supporting seat; the middle part of the magnet is provided with an axial through hole which forms a hollow cylindrical magnetic field space; the angle dial is arranged at the outer side of the magnet, and the synchronous belt is arranged between the rotating shaft of the servo motor and the outer wall of the magnet; the servo motor is connected with a motor driver through a cable, the motor driver is powered by an external power supply, and the motor driver is connected with the upper computer through a signal wire; the motor driver is used for converting an instruction sent by the upper computer into an angular displacement signal and sending the angular displacement signal to the servo motor, the servo motor rotates according to the angular displacement signal, and the servo motor drives the magnet to rotate to a set angle through the synchronous belt.
Further, the magnet is made of a permanent magnet, the permanent magnet is a Halbach array group, and a hollow cylindrical magnetic field space is axially formed in the middle of the magnet.
Further, an angle dial is provided radially outward of the magnet.
The magnetic field direction adjusting method for the magnetocaloric effect measuring instrument comprises the following steps:
initializing a magnetic field system, and driving a magnet to return to a zero-degree position by a servo motor through a synchronous belt;
the upper computer sends an instruction to the motor driver, wherein the instruction comprises the rotation direction and the rotation angle of the magnet; the motor driver converts the instruction into an angular displacement, and forms an angular displacement signal and sends the angular displacement signal to the servo motor;
the servo motor receives the angular displacement signal and rotates according to the angular displacement in the angular displacement signal, and the servo motor drives the magnet to rotate to a set angle position through the synchronous belt.
Preferably, the servo motor drives the magnet to rotate to a set angle position required by the upper computer according to a fixed transmission ratio through the synchronous belt.
Preferably, the magnetic field direction of the magnet synchronously rotates to a set angle position along with the magnet, and the magnetocaloric effect measuring instrument measures the magnetocaloric effect value of the sample under the magnetic field direction of the set angle position.
The technical effects of the invention include:
the invention innovates the problem that the magnetic field system of the traditional magnetocaloric effect measuring instrument is fixed and the direction of the magnetic field is inconvenient to adjust; according to the invention, by accurately adjusting the magnetic field direction, the magnetocaloric effect measuring instrument can measure the magnetocaloric effect of the sample in different magnetic field directions, and the functions of the magnetocaloric effect measuring instrument are more perfected.
According to the invention, the angle dial and the driving motor are additionally arranged on the magnetic field system, so that the magnetic field direction can be controlled and regulated, and the magnetocaloric effect measuring instrument can directly measure the magnetocaloric effect values of samples in different magnetic field directions.
Drawings
Fig. 1 is a schematic diagram of the structure of the magnetic field system of the present invention.
Detailed Description
The following description fully illustrates the specific embodiments of the invention to enable those skilled in the art to practice and reproduce it.
As shown in fig. 1, a schematic diagram of the magnetic field system according to the present invention is shown.
The magnetic field system with adjustable magnetic field direction for the magnetocaloric effect measuring instrument is used for controlling the magnetic field direction of the magnetocaloric effect measuring instrument, and comprises: the device comprises a magnet 1, an angle dial 2, a servo motor 3, a synchronous belt 4, a motor driver 5 and an upper computer 6;
the magnet 1 is cylindrical, two ends of the magnet are provided with rotating shafts, and the rotating shafts are arranged in the supporting seats; the middle part of the magnet 1 is provided with an axial through hole which forms a hollow cylindrical magnetic field space. The magnet 1 is made of a permanent magnet, the permanent magnet is a Halbach array group, a hollow cylindrical magnetic field space is axially formed in the middle of the permanent magnet, a uniform magnetic field is formed in the magnetic field space, the magnetic force line direction of the uniform magnetic field is in a radial direction, and the direction of the magnetic field is indicated by a dotted arrow line.
The angle dial 2 is arranged outside the magnet 1. The timing belt 4 is installed between the rotation shaft of the servo motor 3 and the outer wall of the magnet 1. The servo motor 3 is connected with the motor driver 5 through a cable, a power supply and a control signal are provided by the motor driver 5, and the motor driver 5 is powered by an external power supply; the motor driver 5 is connected with the upper computer 6 through a signal wire.
The motor driver 5 is an actuator that converts an electric pulse into an angular displacement. When the motor driver 5 receives a pulse signal, it drives the servo motor 3 to rotate a fixed angle in a set direction, the rotation being performed at a fixed angle. The angular displacement of the servo motor 3 is controlled by controlling the number of pulses, so that the aim of accurately positioning the rotation angle is fulfilled; while the speed and acceleration of the rotation of the servomotor 3 can be controlled by controlling the pulse frequency.
The servo motor 3 rotates a set angle according to the angular displacement signal, and can realize high-precision angle adjustment.
The upper computer 6 sends an instruction to the motor driver 5, the motor driver 5 sends an angular displacement signal to precisely control the rotation angle of the servo motor 3, and the servo motor 3 drives the magnet 1 to rotate through the synchronous belt 4, so that the adjustment control of the magnetic field direction angle on the hollow cylindrical magnetic field space is realized, and the magnetic field direction adjustment mode comprises but is not limited to automatic control and manual control.
The magnetic field direction adjusting method for the magnetocaloric effect measuring instrument comprises the following specific steps:
step 1: initializing a magnetic field system, and driving the magnet 1 to return to a zero-degree position by the servo motor 3 through the synchronous belt 4;
step 2: the upper computer 6 sends an instruction to the motor driver 5, wherein the instruction comprises the rotation direction and the rotation angle of the magnet 1; the motor driver 5 converts the instruction into an angular displacement amount to form an angular displacement signal and sends the angular displacement signal to the servo motor 3;
step 3: the servo motor 3 receives the angular displacement signal, rotates according to the angular displacement in the angular displacement signal, and the servo motor 3 drives the magnet 1 to rotate to a set angle position through the synchronous belt 4.
The servo motor 3 drives the magnet 1 to rotate to the angle position set by the upper computer 6 according to a fixed transmission ratio through the synchronous belt.
Because the magnetic field direction also rotates to the set angle position along with the magnet 1, the magnetocaloric effect measuring instrument can directly measure the magnetocaloric effect value of the sample under different magnetic field directions. The magnetocaloric effect measuring instrument can then measure the magnetocaloric effect values in different magnetic field directions for the sheet-like or plate-like sample.
The terminology used herein is for the purpose of description and illustration only and is not intended to be limiting. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (6)
1. A magnetic field system with adjustable magnetic field direction for a magnetocaloric effect measuring instrument, comprising: the device comprises a magnet, an angle dial, a servo motor, a synchronous belt, a motor driver and an upper computer; the magnet is cylindrical, two ends of the magnet are respectively provided with a rotating shaft, and the rotating shafts are arranged in the supporting seat; the middle part of the magnet is provided with an axial through hole which forms a hollow cylindrical magnetic field space; the angle dial is arranged at the outer side of the magnet, and the synchronous belt is arranged between the rotating shaft of the servo motor and the outer wall of the magnet; the servo motor is connected with a motor driver through a cable, the motor driver is powered by an external power supply, and the motor driver is connected with the upper computer through a signal wire; the motor driver is used for converting an instruction sent by the upper computer into an angular displacement signal and sending the angular displacement signal to the servo motor, the servo motor rotates according to the angular displacement signal, and the servo motor drives the magnet to rotate to a set angle through the synchronous belt.
2. The magnetic field system with adjustable magnetic field direction for magnetocaloric effect measuring instrument as set forth in claim 1, wherein the magnet is made of permanent magnet, the permanent magnet is Halbach array group, and a hollow cylindrical magnetic field space is formed in the middle of the magnet axially.
3. The magnetic field system with adjustable magnetic field direction for a magnetocaloric effect meter according to claim 1, wherein the angle dial is arranged radially outside the magnet.
4. A method of adjusting the direction of a magnetic field for a magnetocaloric effect measuring instrument, comprising:
initializing a magnetic field system, and driving a magnet to return to a zero-degree position by a servo motor through a synchronous belt;
the upper computer sends an instruction to the motor driver, wherein the instruction comprises the rotation direction and the rotation angle of the magnet; the motor driver converts the instruction into an angular displacement, and forms an angular displacement signal and sends the angular displacement signal to the servo motor;
the servo motor receives the angular displacement signal and rotates according to the angular displacement in the angular displacement signal, and the servo motor drives the magnet to rotate to a set angle position through the synchronous belt.
5. The method of adjusting the direction of a magnetic field for a magnetocaloric effect measuring instrument according to claim 4, wherein the servo motor drives the magnet to rotate to a set angle position required by the upper computer according to a fixed transmission ratio through the synchronous belt.
6. The method of adjusting the magnetic field direction of a magnetocaloric effect meter according to claim 4, wherein the magnetic field direction of the magnet is synchronously rotated with the magnet to a set angle position, and the magnetocaloric effect meter measures the magnetocaloric effect value of the sample in the magnetic field direction of the set angle position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211618800.0A CN116184283A (en) | 2022-12-15 | 2022-12-15 | Magnetic field system with adjustable magnetic field direction for magnetocaloric effect measuring instrument and adjusting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211618800.0A CN116184283A (en) | 2022-12-15 | 2022-12-15 | Magnetic field system with adjustable magnetic field direction for magnetocaloric effect measuring instrument and adjusting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116184283A true CN116184283A (en) | 2023-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211618800.0A Pending CN116184283A (en) | 2022-12-15 | 2022-12-15 | Magnetic field system with adjustable magnetic field direction for magnetocaloric effect measuring instrument and adjusting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116184283A (en) |
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2022
- 2022-12-15 CN CN202211618800.0A patent/CN116184283A/en active Pending
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