A device and method for measuring the Curie temperature of ferrite

Abstract

A ferrite Curie temperature measuring device includes an oven, the top surface of the oven is provided with a sample insertion port for its inner cavity, an LCR bridge tester for testing the Curie temperature of a ferrite magnetic ring is placed on the top surface of the oven on one side of the sample insertion port, a temperature measuring wire is wound around the ferrite magnetic ring, the lead ends of the temperature measuring wire are respectively clamped by test clips, the test clips are connected to the inductance value test port of the LCR bridge tester through data cables, the ferrite magnetic ring is inserted into the inner cavity of the oven from the sample insertion port; the oven is installed on a device placement platform that can be positioned and lifted. The present invention can reasonably adjust the height of the device placement platform according to experimenters of different heights, thereby making the operation and observation of the entire measuring device convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of ferrites, and in particular relates to a device and method for measuring the Curie temperature of ferrites. Background Art

[0002] Curie temperature is the transition temperature of ferrite materials from ferromagnetism (or ferrimagnetism) to paramagnetism, generally represented by Tc; Curie temperature is a physical quantity that characterizes the basic properties of magnetic materials such as ferrites. Determining the Curie temperature of magnetic materials such as ferrites is not only of great significance for the research and development of magnetic materials and magnetic devices, but also for the application of engineering technology. The existing ferrite Curie temperature measurement device is generally placed on a fixed equipment placement platform when in use, which is very inconvenient for experimenters of different heights to operate and observe, and it is urgently needed to be improved. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a ferrite Curie temperature measurement device and method, and the specific technical scheme is as follows:

[0004] A ferrite Curie temperature measuring device comprises an oven, wherein a sample insertion port is provided on the top surface of the oven for its inner cavity, an LCR bridge tester for testing the Curie temperature of a ferrite magnetic ring is placed on the top surface of the oven at one side of the sample insertion port, a temperature measuring wire is wound around the ferrite magnetic ring, and the lead ends of the temperature measuring wire are respectively clamped by test clips, the test clips are connected to the inductance value test port of the LCR bridge tester through a data line, and the ferrite magnetic ring is inserted into the inner cavity of the oven from the sample insertion port;

[0005] The oven is installed on an equipment placement platform that can be positioned and lifted. The equipment placement platform includes support components that are vertically arranged opposite to each other. A storage component for placing the oven is horizontally arranged between two support components. The ends of the storage component are slidably connected to the corresponding support components through connecting components, and the support components can drive the storage component to be positioned, lifted and moved.

[0006] Furthermore, the support assembly includes a horizontally arranged base plate, the base plate is a rectangular structure, and supporting round rods are vertically symmetrically arranged at both ends of the top surface of the base plate, and the top ends of the two supporting round rods are bridged by a horizontally arranged top plate, and a screw is vertically arranged between the top plate and the middle of the base plate, and two positioning nuts are screwed on the screw, and the screw is gap-connected with the end of the storage assembly, and the upper and lower sides of the end of the storage assembly are respectively clamped and connected by the positioning nuts; the two sides of the end of the storage assembly are slidingly connected to the corresponding supporting round rods through the connecting assembly.

[0007] Furthermore, anti-skid foot pads with isosceles trapezoidal structures are vertically symmetrically arranged at both ends of the bottom surface of the bottom plate.

[0008] Furthermore, the storage component includes a storage plate with a rectangular structure, and a convex plate is integrated and horizontally connected in the middle of the end faces of the storage plate. A first through hole is opened in the middle of the convex plate, and the convex plate is connected with the corresponding screw gap through the first through hole; the connecting components are symmetrically arranged on both sides of the convex plate.

[0009] Furthermore, limiting plates are vertically and symmetrically arranged on both sides of the top surface of the storage plate, and the distance between the two limiting plates is adapted to the size of the oven; and a plurality of heat dissipation holes are opened through the storage plate between the two limiting plates.

[0010] Furthermore, the connecting assembly includes a connecting block of a rectangular structure, a second through hole is opened through the middle of the connecting block, the connecting block is slidably connected to the corresponding supporting round rod through the second through hole, and the connecting block is horizontally connected with an insert plate integrally facing the side of the storage plate; the end surfaces of the storage plate on both sides of the convex plate are symmetrically inwardly provided with slots that are plugged into and matched with the corresponding insert plates.

[0011] Further, the oven is provided with a feedback control link module, a temperature control panel, an alarm module and a power switch, the temperature control panel is arranged at the front end of the feedback control link module, and the feedback control link module is electrically connected to the alarm module and the internal test module of the LCR bridge tester through cables respectively;

[0012] When the inductance test value of the LCR bridge tester rises to the maximum value and then drops to half of the maximum value of the inductance test value, the feedback control link module receives the Curie temperature data from the LCR bridge tester and displays and records it through the temperature control panel, while controlling the temperature control panel to keep warm and controlling the alarm module to sound an alarm.

[0013] A method for measuring the Curie temperature of a ferrite comprises the following steps:

[0014] Step S1: Winding the temperature measuring wire around the ferrite ring to be tested for ten turns, and placing the ferrite ring with the temperature measuring wire wound thereon into an oven;

[0015] Step S2: Clamp the connectors at both ends of the temperature measuring line with corresponding test clips, and connect the data line to the inductance value test port of the LCR bridge tester;

[0016] Step S3: Set the temperature value through the temperature control panel of the oven, turn on the power switch of the oven to start heating, and as the temperature in the oven increases, the inductance test value of the LCR bridge tester will continue to increase. Before it increases to the Curie temperature, it will drop sharply. When the inductance value is zero, it is the Curie temperature point, but due to the winding of the temperature measuring wire, it will not drop to zero, so it is set: when the inductance test value rises to the maximum value and then drops to half of the maximum value of the inductance test value, start to keep warm and alarm.

[0017] The beneficial effects of the present invention are:

[0018] The oven in the ferrite Curie temperature measuring device of the present invention is installed on a device placement platform that can be positioned and lifted. The end of the storage component in the device placement platform is slidably connected to the corresponding support component through a connecting component, and the support component can drive the storage component to be positioned, lifted and moved; in this way, the height of the device placement platform can be reasonably adjusted according to the experimental personnel of different heights, thereby making the operation and observation of the entire measuring device convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The structure schematic diagram of the ferrite Curie temperature measuring device of the present invention is shown;

[0020] Figure 2 It shows a schematic diagram of the structure of the ferrite magnetic ring temperature measuring wire in the present invention;

[0021] Figure 3 A schematic diagram showing the structure of the ferrite Curie temperature measuring device and the equipment placement platform of the present invention;

[0022] Figure 4 A schematic diagram showing the structure of the support assembly of the equipment placement platform in the present invention is shown;

[0023] Figure 5 A schematic diagram of the three-dimensional structure of the storage assembly of the present invention is shown;

[0024] Figure 6 A schematic diagram of the three-dimensional structure of the connection assembly in the present invention is shown;

[0025] Figure 7 The control link block diagram of the ferrite Curie temperature measurement method of the present invention is shown.

[0026] As shown in the figure: 1. Oven; 11. Sample plug-in port; 12. Feedback control link module; 13. Temperature control panel; 14. Alarm module; 15. Power switch; 2. LCR bridge tester; 21. Data cable; 22. Test clip; 3. Temperature measuring line; 4. Ferrite magnetic ring; 5. Equipment placement platform; 51. Support assembly; 511. Bottom plate; 512. Anti-slip foot pad; 513. Support round rod; 514. Top plate; 515. Screw; 516. Positioning nut; 517. Spring; 52. Storage assembly; 521. Storage flat plate; 5211. Heat dissipation hole; 522. Protruding plate; 523. First through hole; 524. Slot; 525. Limiting plate; 53. Connection assembly; 531. Connection block; 532. Second through hole; 533. Insert plate. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] like Figure 1 and 3 As shown, a ferrite Curie temperature measuring device comprises an oven 1, wherein a sample insertion port 11 is provided on the top surface of the oven 1 to its inner cavity, an LCR bridge tester 2 for testing the Curie temperature of a ferrite magnetic ring 4 is placed on the top surface of the oven 1 at one side of the sample insertion port 11, a temperature measuring wire 3 is wound around the ferrite magnetic ring 4, and the lead ends of the temperature measuring wire 3 are respectively clamped by test clips 22, and the test clips 22 are connected to the inductance value test port of the LCR bridge tester 2 through a data line 21, and the ferrite magnetic ring 4 is inserted into the inner cavity of the oven 1 from the sample insertion port 11;

[0029] The oven 1 is installed on a positioning and lifting equipment placement platform 5, and the equipment placement platform 5 includes support components 51 arranged vertically opposite to each other, and a storage component 52 for placing the oven 1 is horizontally arranged between two support components 51, and the ends of the storage components 52 are slidably connected to the corresponding support components 51 through connecting components 53, and the support components 51 can drive the storage components 52 to position, lift and move.

[0030] Through the above technical scheme, the oven 1 in the ferrite Curie temperature measuring device is installed on the equipment placement platform 5 which can be positioned and lifted. The end of the storage component 52 in the equipment placement platform 5 is slidably connected with the corresponding support component 51 through the connecting component 53, and the support component 51 can drive the storage component 52 to be positioned, lifted and moved; in this way, the height of the equipment placement platform 5 can be reasonably adjusted according to the experimental personnel of different heights, so that the operation and observation of the entire measuring device become convenient.

[0031] like Figure 4 As shown, the support assembly 51 includes a horizontally arranged bottom plate 511, and the bottom plate 511 is a rectangular structure. Support round rods 513 are vertically symmetrically arranged at both ends of the top surface of the bottom plate 511, and the top ends of the two support round rods 513 are bridged by a horizontally arranged top plate 514. A screw rod 515 is vertically arranged between the top plate 514 and the middle of the bottom plate 511, and two positioning nuts 516 are screwed on the screw rod 515. The screw rod 515 is gap-connected with the end of the storage assembly 52, and the upper and lower sides of the end of the storage assembly 52 are clamped and connected by the positioning nuts 516 respectively; the two sides of the end of the storage assembly 52 are slidably connected with the corresponding support round rods 513 through the connecting assembly 53.

[0032] Through the above technical solution, the screw rod 515 cooperates with the two positioning nuts 516 to position and lift the storage component 52; the two ends of the storage component 52 are slidably connected to the corresponding supporting round rods 513 through the connecting components 53, so that the stability of the storage component 52 can be maintained when it is lifted or lowered.

[0033] like Figure 4 As shown, anti-skid foot pads 512 with isosceles trapezoidal structures are vertically and symmetrically arranged at both ends of the bottom surface of the bottom plate 511.

[0034] Through the above technical solution, the anti-skid foot pad 512 with an isosceles trapezoidal structure can increase the support and anti-skid effect of the entire support assembly 51.

[0035] like Figure 5 As shown, the storage component 52 includes a storage flat plate 521 of a rectangular structure, and a convex plate 522 is integrated and horizontally connected in the middle of the end surface of the storage flat plate 521. A first through hole 523 is opened in the middle of the convex plate 522, and the convex plate 522 is gap-connected with the corresponding screw rod 515 through the first through hole 523; the connecting components 53 are symmetrically arranged on both sides of the convex plate 522.

[0036] Through the above technical solution, the storage plate 521 can be used to horizontally support the oven 1; the convex plate 522 is gap-connected with the corresponding screw 515 through the first through hole 523, and the connecting components 53 are symmetrically arranged on both sides of the convex plate 522, so that the positioning and lifting of the storage plate 521 can be achieved without hindering the sliding connection between the connecting component 53 and the corresponding supporting round rod 513.

[0037] like Figure 5As shown, limiting plates 525 are vertically symmetrically arranged on both sides of the top surface of the storage plate 521, and the distance between the two limiting plates 525 is adapted to the size of the oven 1; a plurality of heat dissipation holes 5211 are opened through the storage plate 521 between the two limiting plates 525.

[0038] Through the above technical solution, the set limit plate 525 can be used to clamp and fix the oven to maintain the stability of the oven; a plurality of heat dissipation holes 5211 are opened through the storage plate 521, which can achieve local heat dissipation and cooling of the oven 1 and extend its service life.

[0039] like Figure 5 and 6 As shown, the connecting assembly 53 includes a connecting block 531 of a rectangular structure, a second through hole 532 is opened through the middle of the connecting block 531, and the connecting block 531 is slidably connected to the corresponding supporting round rod 513 through the second through hole 532. The connecting block 531 is horizontally connected with an insert plate 533 on the side of the storage plate 521; the end surfaces of the storage plate 521 on both sides of the protruding plate 522 are symmetrically inwardly opened with slots 524 that are plugged into and matched with the corresponding insert plates 533.

[0040] Through the above technical solution, the plug plate 533 of the connecting component 53 is plugged into the corresponding slot 524, so that the connecting component 53 and the storage plate 521 can be detachably connected, which is convenient for later disassembly, assembly and transportation.

[0041] like Figure 1 and 7 As shown, the oven 1 is provided with a feedback control link module 12, a temperature control panel 13, an alarm module 14 and a power switch 15, the temperature control panel 13 is arranged at the front end of the feedback control link module 12, and the feedback control link module 12 is electrically connected to the alarm module 14 and the internal test module of the LCR bridge tester 2 through cables respectively;

[0042] When the inductance test value of the LCR bridge tester 2 rises to the maximum value and then drops to half of the maximum value of the inductance test value, the feedback control link module 12 receives the Curie temperature data from the LCR bridge tester 2 and displays and records it through the temperature control panel 13, while controlling the temperature control panel 13 to keep warm and controlling the alarm module 14 to sound an alarm.

[0043] Through the above technical solution, the traditional ferrite Curie temperature measurement device requires one person to record and observe beside the equipment until the Curie temperature point appears, which consumes too much labor cost; by establishing a feedback control link module 12 between the temperature control panel 13 of the oven 1 and the internal test module of the LCR bridge tester 2, and adding an alarm module 14, when the inductance test value drops to zero, an alarm is automatically sounded, and the temperature is kept from rising, and the Curie temperature point is automatically recorded; in this way, there is no need for one person to record and observe beside the equipment until the Curie temperature point appears, saving labor costs.

[0044] like Figure 1 , 2 As shown in 7, a method for measuring the Curie temperature of ferrite comprises the following steps:

[0045] Step S1: Winding the temperature measuring wire 3 on the ferrite magnetic ring 4 to be tested for ten turns, and placing the ferrite magnetic ring 4 with the temperature measuring wire 3 wound thereon into the oven 1;

[0046] Step S2: clamp the connectors at both ends of the temperature measuring line 3 through the corresponding test clips 22 respectively, and connect the data line 21 to the inductance value test port of the LCR bridge tester 2;

[0047] Step S3: Set the temperature value through the temperature control panel 13 of the oven 1, turn on the power switch 15 of the oven 1 to start heating, as the temperature in the oven 1 increases, the inductance test value of the LCR bridge tester 2 will continue to increase, and will drop sharply before reaching the Curie temperature. When the inductance value is zero, it is the Curie temperature point, but due to the winding of the temperature measuring wire, it will not drop to zero, so it is set: when the inductance test value rises to the maximum value and then drops to half of the maximum value of the inductance test value, start to keep warm and alarm.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ferrite Curie temperature measuring device, characterized in that: The invention comprises an oven, wherein a sample insertion port is provided on the top surface of the oven for its inner cavity, an LCR bridge tester for testing the Curie temperature of a ferrite magnetic ring is placed on the top surface of the oven at one side of the sample insertion port, a temperature measuring wire is wound around the ferrite magnetic ring, and the lead ends of the temperature measuring wire are respectively clamped by test clips, the test clips are connected to the inductance value test port of the LCR bridge tester through data cables, and the ferrite magnetic ring is inserted into the inner cavity of the oven from the sample insertion port; The oven is installed on a positioning and lifting equipment placement platform, the equipment placement platform includes supporting components arranged vertically opposite to each other, a storage component for placing the oven is horizontally arranged between two supporting components, the ends of the storage component are slidably connected to the corresponding supporting component through a connecting component, and the supporting component can drive the storage component to position, lift and move; The support assembly comprises a horizontally arranged bottom plate, the bottom plate is a rectangular structure, and supporting round rods are respectively and vertically symmetrically arranged at both ends of the top surface of the bottom plate, and the top ends of the two supporting round rods are bridged by a horizontally arranged top plate, and a screw is vertically arranged between the top plate and the middle of the bottom plate, and two positioning nuts are screwed on the screw, and the screw is gap-connected with the end of the storage assembly, and the upper and lower sides of the end of the storage assembly are respectively clamped and connected by the positioning nuts; the two sides of the end of the storage assembly are respectively slidably connected with the corresponding supporting round rods through the connecting assembly; The oven is provided with a feedback control link module, a temperature control panel, an alarm module and a power switch, the temperature control panel is arranged at the front end of the feedback control link module, and the feedback control link module is electrically connected to the alarm module and the internal test module of the LCR bridge tester through cables respectively; When the inductance test value of the LCR bridge tester rises to the maximum value and then drops to half of the maximum value of the inductance test value, the feedback control link module receives the Curie temperature data from the LCR bridge tester and displays and records it through the temperature control panel, while controlling the temperature control panel to keep warm and controlling the alarm module to sound an alarm.

2. A ferrite Curie temperature measuring device according to claim 1, characterized in that: Anti-skid foot pads with isosceles trapezoidal structures are vertically and symmetrically arranged at both ends of the bottom surface of the bottom plate.

3. The ferrite Curie temperature measuring device according to claim 1, characterized in that: The storage component includes a storage plate of a rectangular structure, and a convex plate is integrated and horizontally connected to the middle of the end surface of the storage plate. A first through hole is opened in the middle of the convex plate, and the convex plate is connected with the corresponding screw gap through the first through hole; the connecting components are symmetrically arranged on both sides of the convex plate.

4. The ferrite Curie temperature measuring device according to claim 3, characterized in that: Limiting plates are vertically and symmetrically arranged on both sides of the top surface of the storage plate, and the distance between the two limiting plates is adapted to the size of the oven; a plurality of heat dissipation holes are opened through the storage plate between the two limiting plates.

5. The ferrite Curie temperature measuring device according to claim 3, characterized in that: The connection assembly includes a connection block of a rectangular structure, a second through hole is opened through the middle of the connection block, the connection block is slidably connected to the corresponding supporting round rod through the second through hole, and the connection block is horizontally connected with an insertion plate on the side of the storage plate; the end surfaces of the storage plate on both sides of the convex plate are symmetrically inwardly opened with slots that are plugged into and matched with the corresponding insertion plates.

6. The measuring method of a ferrite Curie temperature measuring device according to claim 1, characterized in that: The following steps are involved: Step S1: Winding the temperature measuring wire around the ferrite ring to be tested for ten turns, and placing the ferrite ring with the temperature measuring wire wound thereon into an oven; Step S2: Clamp the connectors at both ends of the temperature measuring line with corresponding test clips, and connect the data line to the inductance value test port of the LCR bridge tester; Step S3: Set the temperature value through the temperature control panel of the oven, turn on the power switch of the oven to start heating, and as the temperature in the oven increases, the inductance test value of the LCR bridge tester will continue to increase. Before it increases to the Curie temperature, it will drop sharply. When the inductance value is zero, it is the Curie temperature point, but due to the winding of the temperature measuring wire, it will not drop to zero, so it is set: when the inductance test value rises to the maximum value and then drops to half of the maximum value of the inductance test value, start to keep warm and alarm.

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