Sensor magnetic insulation package, jig, soft magnetic take-up and pay-off device and assembly process

Abstract

The invention relates to the field of sensor processing, in particular to a sensor magnetic insulation package, a magnetic jig, a soft magnetic take-up and pay-off device and an assembly technology.The temperature sensor adopts ceramic magnetic insulation package and is formed through high-temperature sintering, so that ceramic has the performance of a magnet, and the mechanical strength and good insulation strength of original ceramic are kept; the production requirements are further met; a magnetic field is used as micro driving force and applied to full-automatic production of precise and fine electronic raw devices, a soft magnetic collecting and releasing device is additionally arranged on a mechanical arm, and the purposes of automatic correction guiding, automatic material clamping, automatic material releasing, automatic packaging and automatic positioning are achieved through mutual cooperation with magnetic field acting force among a jig and magnetic insulation packaging. The poor quality caused by uncontrollable factors of a traditional sensor production process is reduced, the production process is simplified, and automatic assembly of magnetic insulation packaging and sensor shell pouring sealant filling is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sensor processing, in particular to a sensor magnetic insulation packaging, a magnetic jig, a soft magnetic receiver and a sensor assembly process. BACKGROUND

[0002] The temperature sensor is an electronic device for measuring the temperature of the environment or object, which can convert the temperature signal into an electrical signal (such as voltage, resistance or digital signal) for monitoring, control or recording. The commonly used temperature sensor on the market usually adopts the process flow of first internal packaging and then filling in the shell. In the production process, the traditional insulation packaging packaging process in the internal packaging cannot meet the full automatic production process, and the size of the existing sensor packaging process insulation packaging cannot be determined, which brings great difficulty to the automatic production. In addition, the softness of the sensor wire harness, the fragility of the thermistor glass body and other factors increase the difficulty of the process of filling in the shell. The conventional mechanical hand and mechanical arm cannot complete the automatic precise assembly of small shell and packaging insulation body, so it cannot meet the modern automatic production demand. SUMMARY

[0003] Based on the above problems, the purpose of the present application is to provide a sensor magnetic insulation packaging, a magnetic jig and a sensor assembly process. The present application adopts the following technical scheme:

[0004] The present application provides a sensor magnetic insulation packaging, comprising a ceramic body, the upper end of the ceramic body is a wire hole, the lower end is a device cavity communicating with the wire hole, the ceramic body is provided with a magnetic powder sintering cavity on both sides, and the magnetic powder sintering cavity is provided with a mixed powder of Fe3O4 and Al2O3.

[0005] Specific implementation: Al2O3 is injected to form a ceramic body blank by in-mold pressure casting or in-mold injection molding, and the mold is used as a supporting stress point. The mixed powder of Fe3O4 and Al2O3 is injected into the magnetic powder sintering cavity by a secondary in-mold injection molding method from the top of the mold, and the proportion is 2:1, forming a complete blank. The second step: the blank is sintered at a high temperature of 1300 degrees by a chemical reaction formula: Fe3O4+2Al2O3→3FeAl2O4+O2(↑), so that the iron acicular crystal in the interior is formed and solidified, and then the temperature is raised to 1600 degrees to sinter the ceramic body outside to form, obtaining a magnetic insulation packaging body with Al2O3 as the external component and FeAl2O4 as the internal component in the sintering cavity, so that the ceramic body has a ferrite spinel structure body paramagnetism.

[0006] The soft magnetic receiver added on the mechanical arm generates electromagnetic field by energization, and interacts with the magnetic insulation package to make the magnetic insulation package completely guided and magnetically suspended in the soft magnetic receiver cavity; when the mechanical arm moves above the magnetic jig, the soft magnetic receiver is lowered by the magnetic compression spring arranged on the soft magnetic receiver under the magnetic field interaction force, the soft magnetic receiver is open-circuit demagnetized, the magnetic insulation package is moved towards the magnetic field force of the magnetic jig from the magnetic suspension state until it is inserted into the bottom of the shell and fixed, and the sensor package fixing is completed.

[0007] Preferably, a thermistor is further included, which is arranged in the device cavity, the thermistor is connected with the wire harness above, the wire harness extends to the outside of the ceramic body after penetrating the wire hole of the upper end of the ceramic body, a sealing silica gel particle is arranged below the thermistor, the sealing silica gel particle is fixed in the lower port of the device cavity, and a silica gel inlet is arranged on the sealing silica gel particle.

[0008] Preferably, a shell is further included, and the ceramic body is packaged in the shell.

[0009] The application provides a magnetic jig which is used in cooperation with the sensor magnetic insulation package and includes a tool seat made of flexible material, a shell mounting hole is arranged at the top of the tool seat, the shell is placed in the shell mounting hole, and a magnetic assembly is arranged at the lower part of the shell mounting hole.

[0010] Preferably, the material of the tool seat is soft silica gel material, and the size of the shell mounting hole is smaller than that of the shell.

[0011] Preferably, the magnetic assembly includes strong magnets A, B and C, the strong magnets A and B are fixed together in a left-right arrangement mode, grooves are arranged on the opposite surfaces of the strong magnets A and B, two grooves are assembled to form a magnetic suction hole, the magnetic suction hole is coaxially arranged with the shell mounting hole, and the strong magnet C is arranged at the bottom of the magnetic suction hole.

[0012] Preferably, an embedded groove is arranged at the bottom of the tool seat and corresponds to the position of the shell mounting hole, and the magnetic assembly is arranged in the embedded groove.

[0013] The application provides a soft magnetic receiver which is used in cooperation with the magnetic jig and the sensor magnetic insulation package, the soft magnetic receiver is arranged on a mechanical arm, the soft magnetic receiver includes a guide hole, a spring is wound outside the guide hole, a magnetic ring made of soft magnetic material is fixed at the upper end of the spring, the magnetic ring abuts against a positive electrode, and the lower end of the spring is connected with a negative electrode.

[0014] Preferably, the guide opening is assembled by two half-arc bodies.

[0015] The application provides a process for fully automatic assembly of a temperature sensor by using the sensor magnetic insulation package, the magnetic jig and the soft magnetic receiver and dispenser.

[0016] In the first step, the magnetic assembly is arranged in the tool seat in advance;

[0017] In the second step, the shell is inserted into the tool mounting hole;

[0018] In the third step, the shell part is glued;

[0019] In the fourth step, the ceramic body is placed at the guide opening;

[0020] In the fifth step, the positive electrode and the negative electrode are electrified, so that the magnetic ring made of soft magnetic material generates a magnetic field in the guide opening, the ceramic body is subjected to a magnetic force generated by the magnetic field, the movement direction of the ceramic body is corrected, and the ceramic body is kept in the guide opening;

[0021] In the sixth step, the guide opening and the ceramic body are simultaneously moved to above the shell mounting hole by the mechanical arm, and the guide opening gradually approaches the tool seat, in the process, the magnetic ring is attracted downward by the magnetic assembly and compressed to compress the spring, the magnetic ring is separated from the positive electrode, the magnetic ring loses magnetism instantaneously, and meanwhile, the hercynite structure in the ceramic body is attracted by the magnetic assembly and falls into the potting glue of the shell part instantaneously;

[0022] When the guide opening moves upward away from the magnetic assembly, the magnetic ring contacts the positive electrode again under the action of the spring, a magnetic field closed loop action is generated, and periodic circulation operation is realized;

[0023] In the seventh step, the potting glue of the shell part enters the device cavity from the glue inlet to coat the thermistor, and the excess potting glue overflows from the wire hole, in the process, the magnetic assembly magnetically attracts and fixes the ceramic body, and when the potting glue solidifies, the processing of the sensor product is completed.

[0024] In the eighth step, the magnetic jig and the temperature sensor are moved into the oven for heating and solidification, when the sensor potting glue solidifies, the sensor jig is powered off to lose magnetism, and the sensor is completed.

[0025] Compared with the prior art, the application has the beneficial technical effects:

[0026] The temperature sensor in the application adopts a ceramic magnetic insulation package, is formed by high-temperature sintering, has the performance of a ceramic magnet, and maintains the original mechanical strength and good insulation strength of the ceramic, and further meets the production requirements; uses a magnetic field as a micro driving force, is applied to full-automatic production of precise and small electronic original devices, a soft magnetic receiver is additionally arranged on a mechanical arm, magnetic field forces among the jig, the magnetic insulation package and the soft magnetic receiver are cooperated, automatic correction guiding, automatic clamping, automatic material placing, automatic packaging and automatic positioning are achieved, quality defects caused by uncontrollable factors in traditional sensor production processes are reduced, production processes are simplified, and automatic assembly of the magnetic insulation package and the sensor shell glue filling is realized.

[0027] In summary, the application has the following advantages over the conventional temperature sensor: first, the magnetic insulation package reduces the complex packaging process of the conventional sensor and the curing time after packaging; compared with the conventional production process, the production process flow of the application has high continuity and short production cycle.

[0028] Second, the magnetic insulation package is unified, which increases the consistency of the sensor and replaces the traditional earth universal gravitation with the interaction force of the magnetic field, and the tool positioning and curing are more reliable.

[0029] Third, the application can be automatically assembled into a full-automatic assembly line combined with the existing automatic wire opening machine, automatic butt welding machine, automatic dispensing machine and mechanical arm, which completes the last short board of the sensor production process, makes a qualitative leap in the automatic production of the sensor, and thus reduces the production cost of the sensor. BRIEF DESCRIPTION OF DRAWINGS

[0030] The application will be further described below in combination with the drawings.

[0031] Figure 1 It is a disassembled structure diagram of the sensor magnetic insulation package of the application;

[0032] Figure 2 It is a schematic diagram of the internal structure of the ceramic body of the application;

[0033] Figure 3 It is a schematic diagram of the structure of the ceramic body of the application;

[0034] Figure 4 It is a schematic diagram of the front view structure of the magnetic jig and the soft magnetic receiver of the application;

[0035] Figure 5 It is a schematic diagram of the top view structure of the magnetic jig and the soft magnetic receiver of the application;

[0036] Figure 6 It is a schematic diagram of the bottom view structure of the magnetic jig of the application;

[0037] Figure 7 Structure diagram of magnetic assembly of the present application;

[0038] Figure 8 Structure diagram of strong magnetic A / B of the present application;

[0039] Figure 9 Structure diagram of sensor assembly process steps one to four of the present application;

[0040] Figure 10 Structure diagram of sensor assembly process step five of the present application;

[0041] Figure 11 Structure diagram of sensor assembly process step six of the present application Figure 1 ;

[0042] Figure 12 Structure diagram of sensor assembly process step six of the present application Figure 2 ;

[0043] Figure 13 Structure diagram of sensor assembly process step seven of the present application;

[0044] Figure 14 Structure diagram of sensor assembly finished product of the present application.

[0045] BRIEF DESCRIPTION OF DRAWINGS: 100, magnetic insulation package; 200, soft magnetic receiver; 300, magnetic jig; 1, tool seat; 101, embedded groove; 2, shell mounting hole; 3, magnetic assembly; 301, strong magnetic A; 302, strong magnetic B; 303, recess; 304, magnetic attraction hole; 305, strong magnetic C; 4, guide port; 401, half-arc body; 5, spring; 501, positive electrode; 502, negative electrode; 6, sensor magnetic insulation package; 601, thermistor; 602, wire harness; 603, sealing silica gel particles; 604, glue inlet; 605, wire hole; 606, ceramic body; 607, device cavity; 608, magnetic powder sintering cavity; 609, spinel structure body; 610, shell; 7, magnetic ring. DETAILED DESCRIPTION

[0046] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects more clear and explicit, the present application will be further described in detail below in combination with the drawings and examples.

[0047] As Figures 1 to 3As shown, this embodiment discloses a sensor magnetic insulating package 100. The magnetic insulating package 100 includes a ceramic body 606. The upper end of the ceramic body 606 is a wire hole 605, and the lower end is a device cavity 607 communicating with the wire hole 605. Magnetic powder sintering cavities 608 are provided on both sides of the ceramic body 606. The magnetic powder sintering cavities 608 are filled with a mixed powder of Fe3O4 and Al2O3. The mixed powder of Fe3O4 and Al2O3 is sintered at 1300 degrees to form a spinel-type structure 609. The spinel-type structure 609 has paramagnetic characteristics.

[0048] During the processing of the magnetic insulating encapsulation of the sensor: First step: Obtain the ceramic body (Al2O3) blank through dry powder die casting or injection molding. Second step: The ceramic body is filled with a sintering cavity, and a mixture of iron(III) oxide (Fe3O4) and aluminum(Al2O3) powder (in a ratio of 2:1) is injected into the sintering cavity through in-mold die casting or in-mold injection molding. Third step: The mixture of iron(III) oxide and aluminum(Al2O3) is sintered and solidified at a high temperature of 1300 degrees Celsius (chemical reaction formula: Fe3O4 + 2Al2O3 → 3FeAl2O4 + O2(↑)). Then, the temperature is raised to 1600 degrees Celsius to sinter the outer ceramic body (alumina) to obtain a magnetic insulating encapsulation with an outer component of Al2O3 and an inner component of FeAl2O4, so that the ceramic body 606 has the characteristics of spinel-type paramagnetic structure. (When the external permanent magnetic field and the electromagnetic field approach each other, they will generate an attraction force. When the external permanent magnetic field and the electromagnetic field are dispersed, they will lose magnetism instantly.) The spinel-type structure is set in the sintering cavity of the ceramic body: thus the ceramic body has the paramagnetic characteristics of a magnet, and at the same time has the super insulation of ceramics. Together with the thermistor and the wire harness, it is referred to as the sensor magnetic insulation package in this invention.

[0049] The sensor's magnetically insulated package 6 also includes a thermistor 601 and a housing 610. The thermistor 601 is disposed within the device cavity 607 and is connected to a wiring harness 602 above it. The wiring harness 602 passes through a wire hole 605 at the upper end of the ceramic body 606 and extends to the outside of the ceramic body 606. A sealing silicone granule 603 is disposed below the thermistor 601 and is fixed to the lower port of the device cavity 607. The sealing silicone granule 603 has an adhesive inlet 604. After the above structure is assembled into the ceramic body 606, the ceramic body 606 is encapsulated within the housing 610 using potting compound. The housing 610 has a closed bottom and an open top structure.

[0050] like Figures 4 to 8 As shown, this embodiment discloses a magnetic fixture 300, which cooperates with the sensor magnetic insulation package 100 described above. The magnetic fixture 300 includes a tooling base 1 made of flexible material, which is used to fix the outer shell 610.

[0051] A housing mounting hole 2 is provided on the top of the tool holder 1, and the shell 610 is arranged in the housing mounting hole 2. A lower part of the housing mounting hole 2 is provided with a magnetic assembly 3 for adsorbing and fixing the sensor magnetic insulation package (i.e. the spinel structure 609 on the ceramic body 606 formed by sintering). The tool holder 1 is made of soft silicone material. The size of the shell 610 is larger than that of the housing mounting hole 2, and when the shell 610 is placed in the housing mounting hole 2, a tight fitting and fixing effect is achieved.

[0052] In this embodiment, an embedded groove 101 is arranged at the bottom of the tool holder 1 at a position corresponding to the housing mounting hole 2, and the magnetic assembly 3 is arranged in the embedded groove 101.

[0053] The magnetic assembly 3 includes strong magnets A 301, strong magnets B 302 and a strong magnet C 305. The strong magnets A 301 and the strong magnets B 302 are fixed together in a left-right arrangement. The facing surfaces of the strong magnets A 301 and the strong magnets B 302 are each provided with a groove 303, and the two grooves 303 are assembled to form a magnetic suction hole 304 coaxially arranged with the housing mounting hole 2. The strong magnet C 305 is arranged at the bottom of the magnetic suction hole 304 and is fixed with the strong magnets A 301 and the strong magnets B 302.

[0054] As shown in Figures 4 to 8 In this embodiment, a soft magnetic receiver 200 is disclosed, which is used in cooperation with the magnetic jig 300 and the sensor magnetic insulation package 100 described above. The soft magnetic receiver 200 includes a guide opening 4 for guiding the ceramic body 606 to be inserted into the shell 610. The guide opening 4 is in the shape of a horn with a large upper part and a small lower part, and is assembled by two left and right half-arc bodies 401.

[0055] The guide opening 4 is wrapped with a spring 5, and the upper end of the spring 5 is fixed with a magnetic ring 7 made of soft magnetic material. The magnetic ring 7 abuts against the positive electrode 501, and the lower end of the spring 5 is fixedly connected with the negative electrode 502. After the positive electrode 501 and the negative electrode 502 are electrified, the magnetic ring 7 made of soft magnetic material has magnetism.

[0056] The magnetic ring 7 is made of soft magnetic ferrite material, which is a ferrimagnetic oxide material mainly composed of Fe2O3 and is made by powder metallurgy process and is mainly applied in the field of electronic components in a high-frequency weak-field environment. The coercive force of the soft magnetic material is very low, and it can be repeatedly magnetized in a magnetic field. When the external electric field is removed, the obtained magnetism will disappear completely or mostly. The soft magnetic ferrite material itself does not have magnetism, and only when an external current or magnetic field is applied, magnetism is generated, and the magnetism disappears immediately after the external excitation is removed.

[0057] As shown in Figures 9 to 14As shown, the embodiment also discloses a process for automatically assembling a temperature sensor using the magnetic insulation package, the magnetic jig, and the soft magnetic receiver and dispenser described above, which specifically includes the following steps:

[0058] First, the magnetic assembly 3 is arranged in the tool seat 1 in advance; the thermistor 601 is arranged in the device cavity 607 of the ceramic body 606 and connected with the wire harness 602, and then the sealing silica gel particles 603 are sealed at the lower end of the device cavity 607;

[0059] Second, the shell 610 is inserted into the shell mounting hole 2;

[0060] Third, the shell 610 is injected with glue;

[0061] Fourth, the ceramic body 606 is placed at the guide port 4;

[0062] Fifth, the positive electrode 501 and the negative electrode 502 are electrified, so that the magnetic ring 7 of soft magnetic material generates a magnetic field in the guide port 4, and the magnetic force generated by the magnetic field on the spinel structure 609 in the ceramic body 606 is used to correct the movement direction of the ceramic body 606, while keeping the ceramic body 606 in the guide port 4;

[0063] Sixth, the guide port 4 and the ceramic body 606 are moved to above the shell mounting hole 2 by the mechanical arm, which plays a clamping function when the mechanical arm X and Y axes move (planar motion), and makes the guide port 4 gradually approach the tool seat 1, in the process, the magnetic ring 7 is attracted downward by the magnetic assembly 3 and the spring 5 is compressed, the magnetic ring 7 is separated from the positive electrode 501, the magnetic ring 7 loses magnetism instantaneously, at the same time, the spinel structure 609 in the ceramic body 606 is attracted by the magnetic assembly 3 and falls into the potting glue inside the shell 610 instantaneously;

[0064] When the guide port 4 moves upward away from the magnetic assembly 3, the magnetic ring 7 contacts the positive electrode 501 again under the action of the spring 5, and a magnetic field closed loop action is generated, which runs periodically in a back-and-forth cycle.

[0065] Seventh, the potting glue inside the shell 610 enters the device cavity 607 from the glue inlet 604 to coat the thermistor 601, and the excess potting glue will overflow from the wire hole 605, in the process, the magnetic assembly 3 will forcibly magnetically attract and fix the ceramic body 606, and after the potting glue solidifies, the processing of the sensor product can be completed.

[0066] Eighth, the magnetic jig and the temperature sensor are moved into the oven for heating and solidification, and after the sensor potting glue solidifies, the power supply to the sensor jig is cut off to make the jig lose magnetism and complete the production of the sensor.

[0067] The above described embodiments are only to illustrate the preferred modes of the present application, and are not intended to limit the scope of the present application. Any modification and improvement made by those skilled in the art to the technical solutions of the present application without departing from the design spirit of the present application shall fall within the protection scope of the present application.

Claims

1. A sensor magnetically isolated package (100) characterized by: The ceramic body (606) includes a line hole (605) at the upper end, a device cavity (607) communicating with the line hole (605) at the lower end, and magnetic powder sintering cavities (608) arranged on both sides of the ceramic body (606). The magnetic powder sintering cavities (608) are filled with mixed powder of Fe3O4 and Al2O3 by in-mold pressure casting or in-mold injection, the ratio of which is 2:

1. Then, the mixed powder is sintered and solidified at a high temperature of 1300 degrees, and then the external ceramic body is sintered at a temperature of 1600 degrees to obtain a magnetic insulation packaging body with Al2O3 as the external component and FeAl2O4 as the component in the sintering cavity, so that the ceramic body (606) has the characteristics of ferrite spinel structure paramagnetism. The soft magnetic collector and dispenser (200) added to the mechanical arm generates an electromagnetic field when powered on and interacts with the magnetic insulation packaging (100) to make the magnetic insulation packaging (100) completely guided and magnetically hover in the cavity of the soft magnetic collector and dispenser (200). When the mechanical arm moves above the magnetic jig (300), the soft magnetic collector and dispenser (200) is lowered by the compression spring (5) arranged on the soft magnetic collector and dispenser (200) under the magnetic field interaction force, so that the soft magnetic collector and dispenser (200) is open-circuit demagnetized. The magnetic insulation packaging (100) moves towards the magnetic field force of the magnetic jig (200) from the magnetic hovering state until it is inserted into the bottom of the shell (610) and fixed, completing the sensor packaging and fixing.

2. The sensor magnetically insulated package (100) according to claim 1, characterized in that: A thermistor (601) is arranged in the device cavity (607), the thermistor (601) is connected with the wire harness (602) above, the wire harness (602) extends to the outside of the ceramic body (606) after penetrating the line hole (605) at the upper end of the ceramic body (606), and a sealing silica gel particle (603) is arranged below the thermistor (601) and fixed in the lower port of the device cavity (607). An adhesive inlet (604) is arranged on the sealing silica gel particle (603).

3. A magnetic jig, characterized by: The magnetic jig (300) includes a tool seat (1) made of flexible material, a shell mounting hole (2) is arranged at the top of the tool seat (1), the shell (610) is placed in the shell mounting hole (2), and a magnetic assembly (3) is arranged at the lower part of the shell mounting hole (2).

4. The magnetic jig of claim 3, wherein: The magnetic assembly (3) includes strong magnets A (301), strong magnets B (302), and a strong magnet C (305). The strong magnets A (301) and the strong magnets B (302) are fixed together in a left-right arrangement. Grooves (303) are arranged on the opposite surfaces of the strong magnets A (301) and the strong magnets B (302). Two grooves (303) are assembled to form a magnetic suction hole (304), which is coaxially arranged with the shell mounting hole (2). The strong magnet C (305) is arranged at the bottom of the magnetic suction hole (304).

5. A soft magnetic retractor characterized by: The soft magnetic receiver (200) is arranged on the mechanical arm, the soft magnetic receiver (200) includes a guide port (4), the guide port (4) is wound with a spring (5) outside, the upper end of the spring (5) is fixed with a magnetic ring (7) made of soft magnetic material, the magnetic ring (7) abuts against a positive electrode (501), and the lower end of the spring (5) is connected with a negative electrode (502).

6. A process for fully automated assembly of temperature sensors using the magnetic insulation package of claim 1, the magnetic fixture of claim 3, and the soft magnetic receiver of claim 5. It comprises the following steps: First, set the magnetic assembly (3) in the tool seat (1) in advance; Second, insert the shell (610) into the shell mounting hole (2); Third, glue injection inside the shell (610); Fourth, place the ceramic body (606) at the guide port (4); Fifth, energize the positive electrode (501) and the negative electrode (502), so that the magnetic ring (7) made of soft magnetic material generates a magnetic field in the guide port (4), the magnetic field generates a magnetic force on the ceramic body (606), which is used to correct the movement direction of the ceramic body (606), and the ceramic body (606) is kept in the guide port (4); Sixth, move the guide port (4) together with the ceramic body (606) to above the shell mounting hole (2) through the mechanical arm, and gradually approach the guide port (4) to the tool seat (1), in this process, the magnetic ring (7) is attracted downward by the magnetic assembly (3) and compresses the spring (5), the magnetic ring (7) is separated from the positive electrode (501), the magnetic ring (7) loses magnetism instantaneously, at the same time, the spinel structure (609) in the ceramic body (606) is attracted by the magnetic assembly (3) and falls into the potting glue inside the shell (610) instantaneously; When the guide port (4) moves upward away from the magnetic assembly (3), the magnetic ring (7) contacts the positive electrode (501) again under the action of the spring (5), generates a magnetic field closed loop action, and runs periodically in a back-and-forth cycle; Seventh, the potting glue inside the shell (610) enters the device cavity (607) from the glue inlet (604) to coat the thermistor (601), and the excess potting glue will overflow from the wire hole (605), in this process, the magnetic assembly (3) will forcibly magnetically attract and fix the ceramic body (606), and after the potting glue solidifies, the processing of the sensor finished product can be completed. Eighth, the magnetic jig and the temperature sensor are moved into the oven for heating and solidification, and after the sensor potting glue solidifies, the jig is powered off to lose magnetism, and the sensor is completed.

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