CN220270625U - Wireless temperature probe - Google Patents

Abstract

The utility model provides a wireless temperature probe, which comprises a first metal pipe body, an exposed piece, a first temperature sensor, a circuit board, a battery for supplying power to the circuit board and the first temperature sensor, a grounding component arranged on the exposed piece, a radiating unit and a coaxial feeder line, wherein the first metal pipe body is provided with a first opening; the first temperature sensor, the circuit board and the battery are arranged in the first metal tube body, and the first temperature sensor is arranged close to the first end of the first metal tube body and is connected with the circuit board; the exposed piece is arranged at the second end of the first metal pipe body; the coaxial feeder comprises a central conductor and a second metal tube body, and the second metal tube body is sleeved on the periphery of the central conductor and is insulated from the central conductor; the first end of the central conductor is connected with the circuit board, and the second end of the central conductor is connected with the radiation unit; the second metal tube body is accommodated in the first metal tube body and is mutually insulated; the second metal tube body is in conductive connection with the radio frequency output ground wire of the circuit board and is connected with the grounding component. The wireless signal transmission distance of the utility model is longer.

Description

Wireless temperature probe

[ field of technology ]

The utility model relates to the technical field of thermometers, in particular to a wireless temperature probe.

[ background Art ]

As temperature probes evolve from wired to wireless signal transmission, wired temperature probes are gradually replaced by wireless temperature probes. Wireless temperature probes are favored by many cooking enthusiasts by virtue of being adaptable to enclosed environments (e.g., ovens, roaster) without regard to the length of the connecting wires. However, the existing wireless temperature probe has short signal transmission distance, and cannot meet the urgent requirement that users hope to receive signals and detection information transmitted by the wireless temperature probe at a longer distance.

Thus, a solution is needed.

[ utility model ]

The purpose of the present application is to provide a wireless temperature probe that can make the transmission distance of wireless signals longer.

In order to achieve the above purpose, the wireless temperature probe provided by the utility model comprises a first metal tube body, an exposed part and a temperature measuring component, wherein the temperature measuring component is arranged in the first metal tube body, and the first end of the first metal tube body is a closed end and is used for being inserted into an object to be measured in temperature; the second end of the first metal pipe body is an open end, and the open end is connected with the exposed piece;

the antenna also comprises a grounding part surrounding the exposed piece, a radiating unit at least partially accommodated in the exposed piece and a coaxial feeder line connected with the grounding part and the radiating unit;

the coaxial feeder comprises a central conductor and a second metal tube body, and the second metal tube body is sleeved on the periphery of the central conductor and is insulated from the central conductor; the first end of the central conductor is connected with a radio frequency output feed point of the temperature measuring component, and the second end of the central conductor is connected with the radiation unit so as to transmit a temperature detection result in a wireless mode; the second metal tube body is accommodated in the first metal tube body and is insulated from the first metal tube body, the first end of the second metal tube body is connected with the ground wire of the temperature measuring assembly, the second end of the second metal tube body is connected to the grounding part, and the grounding part surrounds the exposed part.

Preferably, the exposed part is an insulating part, and the grounding part is an annular metal part clamped on the outer side of the exposed part; the annular metal piece is used as a grounding unit of the antenna assembly; the second end of the second metal pipe body is provided with a connecting sheet which extends outwards, and the connecting sheet is electrically connected with the annular metal piece.

As a preferable technical scheme, the annular metal piece comprises a cylindrical part and a flange extending inwards from one end of the cylindrical part, the cylindrical part is sleeved on the exposed piece, and the flange is welded with the connecting piece directly or through a connecting part extending inwards.

As a preferable technical scheme, the exposed piece comprises a first insulator and a second insulator, wherein the first metal pipe body, the first insulator and the second insulator are sequentially connected along the axial direction of the first metal pipe body; the first insulator wraps the second end of the first metal pipe body and is in threaded connection with the threaded part of the first metal pipe body, and the second insulator wraps one end of the first insulator and is in threaded connection with the first insulator; the annular metal member is fixed between the first insulator and the second insulator.

As the preferable technical scheme, the first insulator comprises a base part, a sleeving part, a stud, a through hole and an avoidance groove, wherein the sleeving part is arranged on the base part and is arranged in a step shape with the base part, the stud, the through hole and the avoidance groove are arranged on the sleeving part and are arranged in a step shape with the sleeving part, the through hole penetrates through the base part, the sleeving part and the stud, the avoidance groove is arranged on the sleeving part and is communicated with the through hole, the base part is in threaded connection with the threaded part, the stud is in threaded connection with the second insulator, the cylindrical part is sleeved on the sleeving part, and the connecting sheet stretches into the avoidance groove from the through hole and is electrically connected with the flanging.

As a preferred solution, the central conductor or the radiating element passes through the center of the annular metal part.

As the preferable technical scheme, the temperature measuring component comprises a circuit board and a radio frequency output circuit arranged on the circuit board, the radio frequency output circuit comprises a radio frequency output feed point and a radio frequency output ground wire, the first ceramic support and the second ceramic support are symmetrically sleeved at two ends of the second metal tube body and are contained in the first metal tube body, the second metal tube body, the central conductor and the first metal tube body are coaxially arranged to form a high-frequency coaxial feed line, and the impedance value of the coaxial feed line is matched with that of the radio frequency output circuit of the circuit board.

As a preferable technical scheme, the radiating unit and the central conductor are integrally formed or separately formed in a discrete manner; the radiation unit is accommodated in the exposed piece; the radiation unit is a whip-shaped straight radiation unit, a spiral radiation unit or an involute spiral radiation unit.

As a preferable technical scheme, the temperature measuring assembly further comprises a first temperature sensor and a battery, wherein the first temperature sensor is arranged close to the first end of the first metal tube body and is connected with the circuit board; the circuit board is provided with an elastic protruding piece, and the elastic protruding piece is electrically connected with the inner wall of the first metal tube body to form an anode of the temperature probe charging circuit; the battery is a rechargeable battery or a Faraday capacitor.

As a preferable technical scheme, the first end of the second metal tube body is electrically connected with the radio frequency output ground wire of the circuit board, and the second end of the second metal tube body is electrically connected with the grounding component so as to form the negative electrode of the temperature probe charging circuit.

The utility model forms a wireless temperature probe antenna feeder assembly by arranging a grounding part surrounding an exposed part as a grounding unit, a radiation unit accommodated in the exposed part and a coaxial feeder connecting the grounding part and the radiation unit; the coaxial feeder is provided with impedance matched with the radio frequency output circuit, so that radio frequency signal attenuation is reduced; by arranging the annular grounding component, the ground wire area of the antenna assembly is enlarged in a limited space, so that the radio frequency signal of the wireless temperature probe is transmitted farther.

[ description of the drawings ]

For a further disclosure of the present utility model, reference is first made to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of a temperature probe according to the present utility model;

FIG. 2 is an exploded view of the temperature probe of FIG. 1;

FIG. 3 is a schematic longitudinal cross-sectional view of the temperature probe of FIG. 1;

FIG. 4 is a schematic illustration of the ring metal, feed line and radiating element connections of the temperature probe of FIG. 1;

FIG. 5 is an exploded view of the exposed portion of the temperature probe of FIG. 1;

FIG. 6 is a schematic view of a first insulator of the exposed portion of FIG. 5;

FIG. 7 is a schematic view of a radiation unit of a temperature probe according to a second embodiment of the present utility model;

FIG. 8 is a schematic view of a radiation unit of a temperature probe according to a third embodiment of the present utility model;

fig. 9 is a schematic diagram of a temperature probe according to a third embodiment of the present utility model.

[ detailed description ] of the utility model

The technical solutions in the embodiments of the present utility model will be described below with reference to the accompanying drawings.

Referring to fig. 1 and 2, a temperature probe 100 provided by the present utility model includes a first metal tube 1, an exposed part 2, a temperature measuring component, a grounding part surrounding the exposed part 2, a radiation unit 91 at least partially contained in the exposed part 2, and a coaxial feeder connecting the grounding part and the radiation unit 91, wherein the temperature measuring component is installed in the first metal tube 1.

In this embodiment, the second end of the first metal pipe body 1 is an open end provided with a threaded portion 11. The first metal pipe body 1 is screwed with the exposed piece 2 by the screw portion 11 and closes the open end. Therefore, the stability of the integral connection of the temperature probe is not affected by the phenomena of high temperature environment, deformation caused by heat expansion and cold contraction, and the like. For example, during the process of inserting and extracting the temperature probe, the connection between the first metal pipe fitting 1 and the exposed piece 2 is not loosened and does not fall off.

Preferably, the diameter of the first metal tube 1 is smaller than the diameter of the exposed piece 2. The screw 11 is provided at the outer circumference of the second end of the first metal pipe body 1, and the exposed member 2 wraps the outer circumference of the second end of the first metal pipe body 1 and is screw-coupled with the screw 11.

The temperature measuring assembly comprises a first temperature sensor 5, a circuit board 6 and a battery 8 for supplying power to the circuit board 6 and the first temperature sensor 5, wherein a radio frequency output circuit is arranged on the circuit board 6 and comprises a radio frequency output feed point and a radio frequency output ground wire. Preferably, the battery 8 is a rechargeable battery or a faraday capacitor. The first temperature sensor 5, the circuit board 6 and the battery 8 are disposed within the first metal pipe body 1. The first temperature sensor 5 is arranged near the first end of the first metal tube body 1 and is connected with the circuit board 6. Wherein, the first end of the coaxial feeder is connected with the radio frequency output feed point of the circuit board 6, and the second end of the coaxial feeder extends out from the second end of the first metal tube body 1 and is partially accommodated in the exposed piece 2.

It will be appreciated that the second end of the coaxial feed may also be wholly contained within the exposure member 2, depending on the actual connection design. Preferably, the inner wall of the second end of the first metal tube body 1 is in sealing connection with the outer circumference of the coaxial feeder. In this way, the second end of the first metal pipe body 1 is kept in a closed state.

Referring to fig. 2 and 3, a first end of the first metal tube 1 is a closed end for being inserted into an object to be measured. Preferably, the first temperature sensor 5 is disposed at the closed end, so that the first temperature sensor 5 can more accurately sense temperature information of an object to be measured. And the closed end can be filled with heat conducting materials, such as heat conducting liquid sealed in the closed end, so that the temperature of an object to be measured can be more rapidly conducted from the outer wall of the closed end to the first temperature sensor 5 through the heat conducting liquid, and the detection speed of the first temperature sensor 5 is improved.

Referring to fig. 3, further, a circuit board 6 connected to the first temperature sensor 5 is also disposed near the closed end of the first metal tube 1; so that the circuit board 6 can be connected with the first temperature sensor 5, and the circuit board 6 can be inserted into the region of the object to be measured of the first metal tube body 1 with relatively low temperature under the high-temperature environment, thereby maintaining the good performance of the circuit board 6 and the service life of the circuit board 6.

Referring to fig. 1, 2 and 3, in the present embodiment, the connection (such as the threaded connection and the connection gap) between the second end of the first metal tube 1 and the exposed part 2 is filled with a sealing filling material for enhancing the sealing performance, so as to maintain the sealing and waterproof effects in the first metal tube 1, thereby enhancing the protection of the components such as the first temperature sensor 5, the circuit board 6 and the battery 8 disposed in the first metal tube 1.

Referring to fig. 2 and 3, in the present embodiment, the temperature probe 100 further has a wireless signal transmission function. To enable wireless signal transmission of the temperature probe 100, the temperature probe 100 includes an antenna feed line assembly for wireless signal transmission. In the antenna feeder assembly, the coaxial feeder is a high frequency coaxial feeder. The antenna feeder assembly comprises the coaxial feeder, a radiation unit 91 and a grounding component, wherein one end of the coaxial feeder is connected with a radio frequency output circuit of the circuit board 6, and the other end of the coaxial feeder is connected with an antenna assembly formed by the radiation unit 91 and the grounding component together, so that the function of transmitting radio frequency signals to the antenna assembly through the coaxial feeder and radiating the radio frequency signals is realized. It will be appreciated that the radiating element 91 is housed partially or entirely within the exposed portion 2. The periphery of the coaxial feeder is in sealing connection with the open end of the first metal tube body 1. Through the antenna feeder assembly, wireless signal transmission of the temperature probe 100 is realized, and the temperature probe 100 with the antenna structure is a wireless temperature probe.

Specifically, the coaxial feed line includes a center conductor 9, a second metal tube 10, a first ceramic support 31, and a second ceramic support 35. The first end of the central conductor 9 is connected with a radio frequency output feed point of the temperature measuring component; a second end of the central conductor 9 is connected to a radiating element 91 for transmitting the temperature detection result in a wireless manner. The second metal pipe 10 is accommodated in the first metal pipe 1 and insulated from the first metal pipe 1. The second metal pipe body 10 is fitted around the outer circumference of the center conductor 9, i.e., the second metal pipe body 10 surrounds the center conductor 9 and is insulated from the center conductor 9. The first ceramic bracket 31 and the second ceramic bracket 35 are symmetrically sleeved at two ends of the second metal pipe body 10 and are accommodated in the first metal pipe body 1; the first ceramic support 31 and the second ceramic support 35 define the distance between the outer wall of the second metal tube body 10 and the inner wall of the first metal tube body 1, and further define the distance between the outer wall of the central conductor 9 and the inner wall of the second metal tube body 10, so that the central conductor 9, the second metal tube body 10 and the first metal tube body 1 are axially concentric; so that the central conductor 9, the second metal tube body 10, the first ceramic support 31 and the second ceramic support 35 together constitute a high-frequency coaxial feed line with impedance matching the radio frequency output circuit of the circuit board 6. For example, the impedance of the coaxial feed is 50 ohms and the impedance of the rf output circuit of the circuit board 6 is also 50 ohms or close to 50 ohms.

Referring to fig. 2, 3 and 4, the first end of the second metal tube 10 is connected to the ground of the temperature measuring assembly. Preferably, the first end of the second metal tube body 10 is electrically connected to the rf output ground of the rf output circuit of the circuit board 6. The second ends of the second metal pipe bodies 10 are connected to the ground member and are electrically connected to each other. It will be appreciated that the conductive connection of the second end of the second metal tube 10 to the ground forms the negative electrode of the temperature probe 100.

Referring to fig. 2 and 3, in the present embodiment, the first ceramic bracket 31 includes a columnar portion 32 and a flange portion 34 extending outwardly from one end of the columnar portion 32. The columnar portion 32 is fitted around the outer periphery of the center conductor 9 and is accommodated in the second metal pipe 10; the flange portion 34 is clamped between the second end of the first metal tube body 1 and the inner cavity of the exposure member 2. In this way, the positions of the center conductor 9, the second metal pipe body 10, and the radiation unit 91 can be further stabilized, and the center conductor 9 and the radiation unit 91 can be kept always at the center of the annular metal member 20. Referring to fig. 4, in this embodiment, the exposed member 2 is an insulating member. The grounding member surrounds the exposure member 2 and is fitted into the exposure member 2. The grounding member includes an annular metal member 20. The second end of the second metal tube body 10 has an outwardly extending connecting tab 15. The annular metal piece 20 and the connecting piece 15 are fixedly connected and electrically connected through welding and the like. The ground component is part of an antenna assembly; the annular metal piece 20 or the grounding part as a whole serves as a grounding unit of the antenna assembly; which in combination with the radiating element 91 allows the transmission of the radio signal further and more stable.

Referring to fig. 3 and 4, the center conductor 9 and the radiating element 91 preferably pass through the center of the annular metal piece 20; namely, the annular metal member 20, the radiating element 91 and the coaxial feeder as a whole (the central conductor 9 and the second metal pipe body 10) are all on the same central axis so as to keep the antenna assembly always in a resonant state and maintain the transmission distance of the antenna.

Referring to fig. 2, 3 and 5, the exposure member 2 includes a first insulator 23 and a second insulator 25. The first metal pipe body 1, the first insulator 23, and the second insulator 25 are connected in sequence along the axial direction of the first metal pipe body 1. Specifically, the first insulator 23 wraps around the second end of the first metal pipe body 1, and the first insulator 23 is screw-coupled with the screw portion 11 of the first metal pipe body 1. The second insulator 25 wraps one end of the first insulator 23 and is screwed with the first insulator 23. Referring to fig. 2 and 3, the connection piece 15 protrudes outward from between the first insulator 23 and the second insulator 25. In particular, the exposed piece 2 can be made of high temperature resistant alumina ceramic or zirconia ceramic material; the first metal tube body 1 and the second metal tube body 10 can be integrated hollow tube bodies made of stainless steel, copper and titanium metal materials.

Further, referring to fig. 4, the annular metal member 20 includes a cylindrical portion 21, a flange 201 protruding inward from one end of the cylindrical portion 21, and a connecting portion protruding from the flange 201 and extending toward the center of the cylindrical portion 21. Referring to fig. 3, 5 and 6, the first insulator 23 includes a base 231, a socket 232 disposed on the base 231 and disposed in a stepped manner with the base 231, a stud 233 disposed on the socket 232 and disposed in a stepped manner with the socket 232, a through hole 234 and a relief groove 235, the through hole 234 penetrates the base 231, the socket 232 and the stud 233, the relief groove 235 is disposed on the socket 232 and the stud 233 and communicates with the through hole 234, the base 231 is in threaded connection with the threaded portion 11, and the stud 233 is in threaded connection with the second insulator 25. The end of the feeder line remote from the circuit board 6 passes through the through hole 234 and is accommodated in the second insulator 25.

Referring to fig. 3, 4 and 5, the cylindrical portion 21 of the annular metal member 20 is sleeved on the sleeve portion 232 and abuts against the base 231, and the flange 201 abuts against one end of the sleeve portion 232 close to the stud 233, so that the annular metal member 20 is firmly mounted on the first insulator 23. The connection piece 15 of the second metal pipe body 10 extends into the escape groove 235 from the through hole 234 and is electrically connected to the connection portion of the ring-shaped metal piece 20, specifically, the connection piece 15 is welded to the connection portion of the ring-shaped metal piece 20.

In other embodiments, the cylindrical portion 21 is fitted over the exposed member 2, the flange 201 is not provided with a connecting portion, and the flange 201 is directly welded to the connecting piece 15.

It will be appreciated that the grounding member is also part of the exposed piece 2. Specifically, the grounding member is fixed between the first insulator 23 and the second insulator 25. The grounding part is fixedly connected and electrically connected with the second metal tube body 10 in a welding mode.

Preferably, the junction of the first insulator 23, the ground member, and the second insulator 25 is filled with a seal filler material that enhances sealability. In this way, the components that hold the exposure piece 2 are connected more firmly and can be connected stably also in a high-temperature environment.

Referring to fig. 2 and 3, in the present embodiment, the temperature probe 100 includes a charging circuit. Specifically, the circuit board 6 is provided with an elastic protrusion 61, and the elastic protrusion 61 is electrically connected to the inner wall of the first metal pipe body 1 to form one pole of the charging circuit of the temperature probe 100. As will be appreciated, in this charging circuit, the elastic protruding member 61 may serve as the positive contact, and the first metal tube body 1 is electrically connected to the positive contact of the circuit board 6; the annular metal member 20 electrically connected to the second metal pipe body 10 serves as a negative electrode.

Further, in the present embodiment, the temperature probe 100 further includes a second temperature sensor 50. The second temperature sensor 50 is used to detect temperature information of the external environment of the object to be measured. For example, an object to be measured is placed in the oven, the second temperature sensor 50 is used to detect temperature information in the oven. Specifically, the second temperature sensor 50 is provided at the exposure member 2 so that the second temperature sensor 50 accurately detects temperature information of the external environment. The second temperature sensor 50 is connected with the circuit board 6; the temperature information detected by the second temperature sensor 50 is transmitted to the coaxial feed line through the circuit board 6 so as to be radiated through the antenna assembly. It will be appreciated that the second temperature sensor 50 may also be located close to the junction between the first metal tube 1 and the exposed piece 2; the temperature information of the external environment can be accurately detected. Specifically, the second temperature sensor 50 is electrically connected to the circuit board 6 by providing a lead wire in a gap between the first metal pipe body 1 and the second metal pipe body 10. The ceramic bracket is provided with a wire passing groove on the outer side in the axial direction, through which the lead wire of the second temperature sensor 50 is electrically connected to the circuit board 6.

In this embodiment, the radiating element 91 is integrally formed with the center conductor 9. Specifically, the radiation unit 91 may be a whip-shaped straight radiation unit (as shown in fig. 3), a spiral radiation unit (as shown in fig. 7), or an involute spiral radiation unit (as shown in fig. 8). In other embodiments, the connection between the radiating element 91 and the central conductor 9 is not limited to an integrally formed connection. For example, the radiation element 91 and the center conductor 9 may be formed separately and discretely.

In particular, the whip-like straight radiating element has a length of 20-60mm. The diameter of the spiral radiation unit is 0.2-5mm, the pitch is 0.1-10mm, the spiral diameter is 1-50mm, and the number of spiral turns is 1-50. The diameter of the involute spiral radiating element is smaller than the diameter of the exposed piece 2.

Referring to fig. 9, when the radiation unit 91 is an involute spiral radiation unit, the height of the exposed part 2 can be reduced and the volume of the exposed part 2 can be reduced. It can be appreciated that the appearance shape, color, size, etc. of the exposed part 2 can be flexibly designed so as to be recognized and distinguished by a user, thereby meeting the use requirement.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. The wireless temperature probe comprises a first metal pipe body (1), an exposed piece (2) and a temperature measuring component, wherein the temperature measuring component is arranged in the first metal pipe body (1), and the first end of the first metal pipe body (1) is a closed end and is used for being inserted into an object to be measured in temperature; the second end of the first metal pipe body (1) is an open end, and the open end is connected with the exposed piece (2);

characterized by further comprising a grounding member surrounding the exposed piece (2), a radiating element (91) at least partially housed within the exposed piece (2), and a coaxial feeder connecting the grounding member and the radiating element (91);

the coaxial feeder comprises a central conductor (9) and a second metal tube body (10), wherein the second metal tube body (10) is sleeved on the periphery of the central conductor (9) and is insulated from the central conductor (9); the first end of the central conductor (9) is connected with a radio frequency output feed point of the temperature measuring component, and the second end of the central conductor is connected with the radiation unit (91) so as to transmit a temperature detection result in a wireless mode; the second metal tube body (10) is accommodated in the first metal tube body (1) and is insulated from the first metal tube body (1), a first end of the second metal tube body (10) is connected with the ground wire of the temperature measuring assembly, a second end of the second metal tube body is connected to the grounding part, and the grounding part surrounds the exposed part (2).

2. The wireless temperature probe according to claim 1, characterized in that the exposed part (2) is an insulating part, and the grounding part is an annular metal part (20) clamped on the outer side of the exposed part; the annular metal piece (20) is used as a grounding unit of the antenna assembly; the second end of the second metal pipe body (10) is provided with a connecting sheet (15) which extends outwards, and the connecting sheet (15) is electrically connected with the annular metal piece (20).

3. A wireless temperature probe according to claim 2, characterized in that the annular metal member (20) comprises a cylindrical portion (21) and a flange (201) extending inwardly from one end of the cylindrical portion (21), the cylindrical portion (21) being fitted over the exposed member (2), the flange (201) being welded to the connecting piece (15) directly or through an inwardly extending connection.

4. A temperature probe according to claim 3, wherein the exposed part (2) comprises a first insulator (23) and a second insulator (25), and the first metal tube body (1), the first insulator (23) and the second insulator (25) are sequentially connected along the axial direction of the first metal tube body (1); the first insulator (23) wraps the second end of the first metal pipe body (1) and is in threaded connection with the threaded part (11) of the first metal pipe body (1), and the second insulator (25) wraps one end of the first insulator (23) and is in threaded connection with the first insulator (23); the annular metal member (20) is fixed between the first insulator (23) and the second insulator (25).

5. The temperature probe according to claim 4, wherein the first insulator (23) comprises a base (231), a socket (232) arranged on the base (231) and arranged in a stepped manner with the base (231), a stud (233) arranged on the socket (232) and arranged in a stepped manner with the socket (232), a through hole (234) and a recess (235), the through hole (234) penetrates through the base (231), the socket (232) and the stud (233), the recess (235) is arranged on the socket (232) and the stud (233) and is communicated with the through hole (234), the base (231) is in threaded connection with the threaded portion (11), the stud (233) is in threaded connection with the second insulator (25), the cylindrical portion (21) is sleeved on the socket (232), and the connecting piece (15) extends into the recess (235) from the through hole (234) and is electrically connected with the flange (201).

6. A wireless temperature probe according to claim 3, characterized in that the central conductor (9) or the radiating element (91) passes through the center of the annular metal piece (20).

7. The temperature probe according to claim 1, wherein the temperature measuring assembly comprises a circuit board (6) and a radio frequency output circuit arranged on the circuit board (6), the radio frequency output circuit comprises a radio frequency output feed point and a radio frequency output ground wire, the first ceramic support (31) and the second ceramic support (35) are symmetrically sleeved at two ends of the second metal tube body (10) and are contained in the first metal tube body (1), the second metal tube body (10), the central conductor (9) and the first metal tube body (1) are coaxially arranged to form a high-frequency coaxial feed line, and the impedance value of the coaxial feed line is matched with that of the radio frequency output circuit of the circuit board (6).

8. A temperature probe according to claim 1, characterized in that the radiating element (91) is formed integrally with the central conductor (9) or separately discrete; the radiation unit (91) is accommodated in the exposed piece (2); the radiating unit (91) is a whip-shaped straight radiating unit, a spiral radiating unit or an involute spiral radiating unit.

9. The temperature probe according to claim 7, characterized in that the temperature measuring assembly further comprises a first temperature sensor (5) and a battery (8), the first temperature sensor (5) being arranged close to a first end of the first metal tube body (1) and being connected to the circuit board (6); the circuit board (6) is provided with an elastic protruding piece (61), and the elastic protruding piece (61) is electrically connected with the inner wall of the first metal tube body (1) to form an anode of the temperature probe charging circuit; the battery (8) is a rechargeable battery or a Faraday capacitor.

10. A temperature probe according to claim 9, wherein a first end of the second metal tube (10) is electrically connected to the rf output ground of the circuit board (6) and a second end thereof is electrically connected to a ground member to form a negative electrode of the temperature probe charging circuit.