Probe assembly of coaxial guided wave radar and coaxial guided wave radar

Abstract

The present disclosure provides a probe assembly of a coaxial guided wave radar, comprising: a central conductor, the central conductor is used to guide the electromagnetic waves generated by the coaxial guided wave radar for emission, and guide the returned electromagnetic waves; an outer wall tube, the outer wall tube is sleeved on the outside of the central conductor, and the central conductor and the outer wall tube have the same extension direction; and an insulating support part, the insulating support part is made of an insulating material, the insulating support part is arranged between the central conductor and the outer wall tube to insulate the central conductor and the outer wall tube, and the insulating support part forms a continuous channel between the central conductor and the outer wall tube and along the extension direction of the central conductor, and the continuous channel can be passed by liquid. The present disclosure also provides a coaxial guided wave radar.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of guided wave radars, and in particular, relates to a probe assembly of a coaxial guided wave radar and a coaxial guided wave radar. Background Art

[0002] The minimum outer tube size of the coaxial guided wave radar in the prior art is 20 mm, that is, if the size of the opening of the container to be measured on site is less than 20 mm, the coaxial guided wave radar cannot be used for measurement.

[0003] For example, some small high-pressure tanks generally have small opening sizes, which limits the use of coaxial guided wave radar.

[0004] The coaxial guided wave radar in the prior art often uses low dielectric constant plastic or ceramic as a support member. The structure of the support member in the prior art leads to discontinuity of wave impedance, thereby forming a reflected wave, making it impossible to measure the low dielectric constant liquid.

[0005] It is required that the intensity of the reflected echo from the liquid is greater than the intensity of the reflected echo from the support. Summary of the invention

[0006] In order to solve at least one of the above technical problems, the present disclosure provides a probe assembly of a coaxial guided wave radar and a coaxial guided wave radar.

[0007] The probe assembly of the coaxial guided wave radar and the coaxial guided wave radar disclosed in the present invention are realized by the following technical solutions.

[0008] According to one aspect of the present disclosure, a probe assembly of a coaxial guided wave radar is provided, comprising:

[0009] A central conductor for guiding electromagnetic waves generated by the coaxial guided wave radar for transmission and for guiding returning electromagnetic waves;

[0010] an outer wall tube, wherein the outer wall tube is sleeved on the outside of the central conductor, and the central conductor and the outer wall tube have the same extension direction; and

[0011] An insulating support portion, wherein the insulating support portion is made of an insulating material, and the insulating support portion is arranged between the central conductor and the outer wall tube to insulate the central conductor from the outer wall tube. The insulating support portion is continuous along the extension direction of the central conductor and the extension direction of the outer wall tube, and the insulating support portion forms a continuous channel between the central conductor and the outer wall tube along the extension direction of the central conductor, and the continuous channel can be passed by liquid.

[0012] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, the wave impedance of the waveguide formed by the central conductor, the outer wall tube and the insulating support portion is constant or has no sudden change along the extension direction of the central conductor.

[0013] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, all cross sections of the insulating support portion perpendicular to the extending direction of the central conductor have the same shape.

[0014] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, the shapes of all cross sections of the insulating support portion perpendicular to the extension direction of the central conductor are the same as the shapes of all cross sections of the central conductor.

[0015] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, the insulating support part includes a plurality of insulating support wires, each insulating support wire is arranged in parallel, each insulating support wire is parallel to the central conductor, and a continuous channel is formed between two adjacent insulating support wires.

[0016] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, the plurality of insulating support wires of the insulating support portion are evenly arranged along the circumference of the outer wall tube.

[0017] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, the number of the insulating support wires is two or three or more.

[0018] According to at least one embodiment of the present disclosure, the probe assembly of the coaxial guided wave radar also includes a first fixing part and a second fixing part, the first fixing part is used to fix the first end of each insulating support wire of the insulating support part to the first end of the center conductor or to the first end of the outer wall tube, and the second fixing part is used to fix the second end of each insulating support wire of the insulating support part to the second end of the center conductor or to the second end of the outer wall tube.

[0019] According to at least one embodiment of the present disclosure, the probe assembly of the coaxial guided wave radar further includes a tensioning mechanism, which is used to tension the central conductor.

[0020] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, the tensioning mechanism includes a positioning portion, the outer periphery of at least a portion of the positioning portion is provided with an external thread, and the inner wall of the outer wall tube is provided with an internal thread, and the positioning portion can move along the axial direction of the outer wall tube through the cooperation of the external thread and the internal thread; a center hole is provided at the center of the positioning portion, and the center hole can be inserted by the second end of the center conductor and the second end of the center conductor can be fixedly connected to the positioning portion, so that the center conductor can be tightened following the movement of the positioning portion relative to the outer wall tube.

[0021] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, the tensioning mechanism further includes a locking portion, and the locking portion is used to lock the relative positions of the outer wall tube and the positioning portion.

[0022] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, a positioning hole is provided at the second end of the outer wall tube, and the locking portion can pass through the positioning hole to apply pressure to the locking portion to lock the relative positions of the outer wall tube and the positioning portion.

[0023] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, one or more liquid inlet holes are provided on the outer wall tube, and liquid can enter into the continuous channel between the central conductor and the outer wall tube through the liquid inlet holes.

[0024] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, the central conductor is a metal wire, and the outer wall tube is a metal tube.

[0025] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, the insulating support portion includes at least one insulating support wire, the insulating support wire is arranged in a spiral manner between the center conductor and the outer wall tube, and the continuous channel extends in a spiral manner between the center conductor and the outer wall tube.

[0026] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, the number of the insulating support wire is one.

[0027] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, the number of the insulating support wires is two or three or more.

[0028] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, the winding angle between the insulating support wire and the central conductor is 45 degrees to 70 degrees.

[0029] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, there is a spacing between two adjacent insulating support wires to form the continuous channel.

[0030] According to at least one embodiment of the present disclosure, the probe assembly of the coaxial guided wave radar also includes a first fixing part and a second fixing part, the first fixing part is used to fix the first end of each insulating support wire of the insulating support part to the first end of the center conductor or to the first end of the outer wall tube, and the second fixing part is used to fix the second end of each insulating support wire of the insulating support part to the second end of the center conductor or to the second end of the outer wall tube.

[0031] According to at least one embodiment of the present disclosure, the probe assembly of the coaxial guided wave radar further includes a tensioning mechanism, which is used to tension the central conductor.

[0032] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, the tensioning mechanism includes a positioning portion, the outer periphery of at least a portion of the positioning portion is provided with an external thread, and the inner wall of the outer wall tube is provided with an internal thread, and the positioning portion can move along the axial direction of the outer wall tube through the cooperation of the external thread and the internal thread; a center hole is provided at the center of the positioning portion, and the center hole can be inserted by the second end of the center conductor and the second end of the center conductor can be fixedly connected to the positioning portion, so that the center conductor can be tightened following the movement of the positioning portion relative to the outer wall tube.

[0033] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, the tensioning mechanism further includes a locking portion, and the locking portion is used to lock the relative positions of the outer wall tube and the positioning portion.

[0034] According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, a positioning hole is provided at the second end of the outer wall tube, and the locking portion can pass through the positioning hole to apply pressure to the locking portion to lock the relative positions of the outer wall tube and the positioning portion.

[0035] According to another aspect of the present disclosure, there is provided a coaxial guided wave radar, comprising:

[0036] The probe assembly as described in any one of the above items; and a radar body, wherein the probe assembly and the radar body are sealed and connected via a sealing portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0038] Figure 1 It is a schematic structural diagram of a coaxial guided wave radar according to an embodiment of the present disclosure.

[0039] Figure 2 yes Figure 1 FIG. 1 is a schematic diagram of a partially enlarged structure of region A of a coaxial guided wave radar according to an embodiment of the present disclosure.

[0040] Figure 3 It is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of a coaxial guided wave radar according to an embodiment of the present disclosure.

[0041] Figure 4 It is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of a coaxial guided wave radar according to yet another embodiment of the present disclosure.

[0042] Figure 5 It is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of a coaxial guided wave radar according to yet another embodiment of the present disclosure.

[0043] Figure 6 It is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of a coaxial guided wave radar according to yet another embodiment of the present disclosure.

[0044] Figure 7 The present invention is a partial cross-sectional schematic diagram of a probe assembly of a coaxial guided wave radar according to an embodiment of the present invention, along the axial direction of the probe assembly.

[0045] Description of Reference Numerals

[0046] 10 Coaxial guided wave radar

[0047] 100 Probe Assembly

[0048] 101 Center conductor

[0049] 102 outer wall tube

[0050] 103 Insulation support

[0051] 104 tensioning mechanism

[0052] 200 Radar Body

[0053] 300 Sealing part

[0054] 1031 Insulated Support Wire

[0055] 1041 Positioning Department

[0056] 1042 Locking unit. DETAILED DESCRIPTION

[0057] The present disclosure is further described in detail below in conjunction with the accompanying drawings and implementations. It is understood that the specific implementations described herein are only used to explain the relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only the parts related to the present disclosure are shown in the accompanying drawings.

[0058] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present disclosure can be combined with each other. The technical solution of the present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0059] Unless otherwise specified, the exemplary embodiments / embodiments shown will be understood as providing exemplary features of various details of some ways in which the technical concept of the present disclosure can be implemented in practice. Therefore, unless otherwise specified, the features of the various embodiments / embodiments can be combined, separated, interchanged and / or rearranged without departing from the technical concept of the present disclosure.

[0060] The use of cross-hatching and / or shading in the accompanying drawings is generally used to make the boundaries between adjacent components clear. As such, unless otherwise specified, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for the specific materials, material properties, dimensions, proportions, commonalities between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. In addition, in the accompanying drawings, the sizes and relative sizes of the components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process sequence can be performed in a different order than described. For example, two successively described processes can be performed substantially simultaneously or in an order opposite to the described order. In addition, the same figure numbers represent the same components.

[0061] When a component is referred to as being "on" or "over," "connected to," or "coupled to" another component, the component may be directly on, directly connected to, or directly coupled to the other component, or intervening components may be present. However, when a component is referred to as being "directly on," "directly connected to," or "directly coupled to" another component, there are no intervening components. For this purpose, the term "connected" may refer to a physical connection, an electrical connection, etc., with or without intervening components.

[0062] For descriptive purposes, the present disclosure may use spatially relative terms such as "under," "beneath," "under," "down," "over," "upper," "above," "higher," and "side (e.g., in a "sidewall")," to describe the relationship of one component to another (other) component as shown in the accompanying drawings. The spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, components described as "under" or "beneath" other components or features would subsequently be positioned "over" the other components or features. Thus, the exemplary term "under" can encompass both the "above" and "below" orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0063] The terms used here are for the purpose of describing specific embodiments, and are not intended to be restrictive. As used here, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, it is explained that there are stated features, integral bodies, steps, operations, parts, assemblies and / or their groups, but it is not excluded that there are or add one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups. It should also be noted that, as used here, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values ​​and / or the values ​​provided that will be recognized by those of ordinary skill in the art.

[0064] Figure 1 It is a schematic structural diagram of a coaxial guided wave radar according to an embodiment of the present disclosure. Figure 2 yes Figure 1 FIG. 1 is a schematic diagram of a partially enlarged structure of region A of a coaxial guided wave radar according to an embodiment of the present disclosure. Figure 3 It is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of a coaxial guided wave radar according to an embodiment of the present disclosure. Figure 4 It is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of a coaxial guided wave radar according to yet another embodiment of the present disclosure. Figure 5 It is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of a coaxial guided wave radar according to yet another embodiment of the present disclosure. Figure 6 It is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of a coaxial guided wave radar according to yet another embodiment of the present disclosure. Figure 7 The present invention is a partial cross-sectional schematic diagram of a probe assembly of a coaxial guided wave radar according to an embodiment of the present invention, along the axial direction of the probe assembly.

[0065] Combined with the following Figures 1 to 7 A probe assembly of a coaxial guided wave radar and a coaxial guided wave radar disclosed in the present invention are described in detail.

[0066] like Figures 1 to 7 As shown, a probe assembly 100 of a coaxial guided wave radar according to an embodiment of the present disclosure includes:

[0067] A central conductor 101, which is used to guide the electromagnetic waves generated by the coaxial guided wave radar 10 for transmission and to guide the returning electromagnetic waves;

[0068] An outer wall tube 102, the outer wall tube 102 is sleeved outside the central conductor 101, and the central conductor 101 and the outer wall tube 102 have the same extension direction; and,

[0069] The insulating support portion 103 is made of an insulating material and is disposed between the center conductor 101 and the outer wall tube 102 to insulate the center conductor 101 from the outer wall tube 102. The insulating support portion 103 is continuous along the extension direction of the center conductor 101 and the extension direction of the outer wall tube 102. The insulating support portion 103 forms a continuous channel between the center conductor 101 and the outer wall tube 102 and along the extension direction of the center conductor 101, and the continuous channel can be passed by liquid.

[0070] The extending direction of the central conductor 101 and the extending direction of the outer wall tube 102 are the same.

[0071] In the above embodiment, the wave impedance of the waveguide formed by the central conductor 101 , the outer wall tube 102 and the insulating support portion 103 along the extending direction of the central conductor 101 remains unchanged or has no sudden change.

[0072] Preferably, all cross sections of the insulating support portion 103 perpendicular to the extending direction of the central conductor 101 have the same shape.

[0073] Preferably, the shapes of all cross sections of the insulating support portion 103 perpendicular to the extending direction of the central conductor 101 are the same as the shapes of all cross sections of the central conductor 101 .

[0074] The probe assembly 100 of the coaxial guided wave radar disclosed in the present invention has redesigned the structure and setting method of the insulating support part 103, thereby avoiding the discontinuity of the entire waveguide impedance caused by the bracket of the coaxial guided wave radar in the prior art. The probe assembly 100 of the coaxial guided wave radar disclosed in the present invention forms the above-mentioned continuous channel to achieve the consistency of the wave impedance of the entire probe assembly 100, and can avoid the reflection echo generated at the support part, thereby making it possible to measure liquids with ultra-low dielectric constants / liquids with dielectric constants lower than that of the bracket material.

[0075] Furthermore, through the structural design of the insulating support portion 103 of the probe assembly 100 disclosed in the present invention, the size of the outer wall tube 102 can be made less than 7 mm, so that traditional small high-pressure tanks, such as gas tanks, can conveniently achieve liquid level measurement.

[0076] According to a preferred embodiment of the present disclosure, the insulating support portion 103 of the probe assembly 100 of the coaxial guided wave radar includes a plurality of insulating support wires 1031, each insulating support wire 1031 is arranged in parallel, each insulating support wire 1031 is parallel to the center conductor 101, and a continuous channel is formed between two adjacent insulating support wires 1031.

[0077] like Figure 3 , Figure 4 , Figure 5 As shown, the number of insulating support wires 1031 may be two, three or more than four, and the cross-section of the insulating support wire 1031 may be circular, elliptical or rectangular. The present disclosure does not specifically limit the shape of the cross-section of the insulating support wire 1031.

[0078] Preferably, the plurality of insulating support wires 1031 of the insulating support portion 103 of the probe assembly 100 of the coaxial guided wave radar are evenly arranged along the circumference of the outer wall tube 102 .

[0079] Preferably, the number of the insulating support wires 1031 of the probe assembly 100 of the coaxial guided wave radar is two or more than three.

[0080] For the probe assembly 100 of the coaxial guided wave radar of the above-mentioned embodiment, preferably, it also includes a first fixing part and a second fixing part, the first fixing part is used to fix the first end of each insulating support wire 1031 of the insulating support part 103 to the first end of the central conductor 101 or to the first end of the outer wall tube 102, and the second fixing part is used to fix the second end of each insulating support wire 1031 of the insulating support part 103 to the second end of the central conductor 101 or to the second end of the outer wall tube 102.

[0081] Inspired by the technical solution of the present disclosure, those skilled in the art can make appropriate settings for the specific structures of the first fixing part and the second fixing part, and the present disclosure does not specifically limit the specific structures of the first fixing part and the second fixing part.

[0082] The fixing structure (the first fixing part and the second fixing part) is used to ensure that the two ends of the insulating support wire 1031 no longer rotate or move.

[0083] Both ends of the insulating support wire 1031 can be fixed on the outer wall tube 102. The fixing structure can be a hole in the outer wall tube 102, the insulating support wire 1031 passes through the hole, and then the passing part is locked or fixed, or the outer diameter of the insulating support wire 1031 is changed by hot melting so as to be locked or fixed.

[0084] Both ends of the insulating support wire 1031 may be fixed to the center conductor 101 .

[0085] A hole can be opened on the insulating support wire 1031, and the center conductor 101 can be passed through the hole. Then, a small section of metal tube is put on each side of the hole of the insulating support wire 1031, and the metal tube is pressed by pressure. The outer diameter of the metal tube is larger than the outer diameter of the insulating support wire 1031, so that the insulating support wire 1031 is locked on the center conductor 101.

[0086] For the probe assembly 100 of the coaxial guided wave radar in the above embodiment, preferably, the probe assembly 100 further includes a tensioning mechanism 104 , and the tensioning mechanism 104 is used to tension the central conductor 101 .

[0087] Figure 1 and Figure 2 The tensioning mechanism 104 is shown as an example.

[0088] According to a preferred embodiment of the present disclosure, the tensioning mechanism 104 of the probe assembly 100 of the coaxial guided wave radar includes a positioning portion 1041, and the outer periphery of at least a portion of the positioning portion 1041 is provided with an external thread, and the inner wall of the outer wall tube 102 is provided with an internal thread. Through the cooperation of the external thread and the internal thread, the positioning portion 1041 can move along the axial direction of the outer wall tube 102; a center hole is provided at the center of the positioning portion 1041, and the center hole can be inserted by the second end of the center conductor 101 and the second end of the center conductor 101 can be fixedly connected to the positioning portion 1041, so that the center conductor 101 can be tightened following the movement of the positioning portion 1041 relative to the outer wall tube 102.

[0089] According to a preferred embodiment of the present disclosure, the tensioning mechanism 104 of the probe assembly 100 of the coaxial guided wave radar further includes a locking portion 1042 , which is used to lock the relative positions of the outer wall tube 102 and the positioning portion 1041 .

[0090] Preferably, the second end ( Figure 1 A positioning hole is provided at the lower end of the outer wall tube 102, and the locking portion 1042 can pass through the positioning hole to apply pressure to the locking portion 1042 to lock the relative positions of the outer wall tube 102 and the positioning portion 1041.

[0091] The locking portion 1042 may be a jackscrew.

[0092] Those skilled in the art should understand that Figure 1 and Figure 2 The extension dimension of the locking portion 1042 along the horizontal direction is only for the convenience of explaining the locking portion 1042. The locking portion 1042 may have a smaller dimension along the direction perpendicular to the wall surface of the outer wall tube 102, or the locking portion 1042 extends along the axial direction of the outer wall tube 102 and is inserted into the gap between the outer wall tube 102 and the positioning portion 1041 to squeeze the positioning portion 1041 and thereby lock the positioning portion 1041.

[0093] The positioning portion 1041 may be a metal tube segment, the diameter of which is slightly larger than the radial dimension of the central conductor 101 .

[0094] A probe assembly 100 of a coaxial guided wave radar according to another embodiment of the present disclosure includes:

[0095] A central conductor 101, which is used to guide the electromagnetic waves generated by the coaxial guided wave radar 10 for transmission and to guide the returning electromagnetic waves;

[0096] An outer wall tube 102, the outer wall tube 102 is sleeved outside the central conductor 101, and the central conductor 101 and the outer wall tube 102 have the same extension direction; and,

[0097] The insulating support portion 103 is made of an insulating material and is disposed between the center conductor 101 and the outer wall tube 102 to insulate the center conductor 101 from the outer wall tube 102. The insulating support portion 103 forms a continuous channel between the center conductor 101 and the outer wall tube 102 along the extension direction of the center conductor 101, and the continuous channel can be passed by liquid.

[0098] The insulating support portion 103 includes at least one insulating support wire 1031 , which is disposed in a spiral manner between the central conductor 101 and the outer wall tube 102 , and the continuous channel extends in a spiral manner between the central conductor 101 and the outer wall tube 102 .

[0099] like Figure 5As shown, the number of the insulating support wire 1031 of the insulating support part 103 of the probe assembly 100 of the coaxial guided wave radar is one.

[0100] For the probe assembly 100 of the coaxial guided wave radar of the above embodiment, the number of the insulating support wires 1031 is two or three or more.

[0101] For the probe assembly 100 of the coaxial guided wave radar of the above embodiment, preferably, the winding angle between the insulating support wire 1031 and the central conductor 101 is 45 degrees to 70 degrees.

[0102] For the probe assembly 100 of the coaxial guided wave radar of the above embodiment, preferably, there is a spacing between two adjacent insulating support wires 1031 to form a continuous channel.

[0103] The above-mentioned continuous channel facilitates the flow of liquid therein, ensuring that the liquid can flow freely in the gap between the outer wall tube 102 , the insulating support wire 1031 and the center conductor 102 .

[0104] In this embodiment, the insulating support line 1031 may be composed of a plurality of insulating support sub-line segments.

[0105] For the probe assembly 100 of the coaxial guided wave radar of the above-mentioned embodiment, preferably, it also includes a first fixing part and a second fixing part, the first fixing part is used to fix the first end of each insulating support wire 1031 of the insulating support part 103 to the first end of the central conductor 101 or to the first end of the outer wall tube 102, and the second fixing part is used to fix the second end of each insulating support wire 1031 of the insulating support part 103 to the second end of the central conductor 101 or to the second end of the outer wall tube 102.

[0106] The probe assembly 100 of the coaxial guided wave radar in the above embodiment preferably further includes a tensioning mechanism 104 , and the tensioning mechanism 104 is used to tension the central conductor 101 .

[0107] For the probe assembly 100 of the coaxial guided wave radar of the above-mentioned embodiment, preferably, the tensioning mechanism 104 includes a positioning portion 1041, and the outer periphery of at least a portion of the positioning portion 1041 is provided with an external thread, and the inner wall of the outer wall tube 102 is provided with an internal thread, and the positioning portion 1041 can move along the axial direction of the outer wall tube 102 through the cooperation of the external thread and the internal thread; a center hole is provided at the center of the positioning portion 1041, and the center hole can be inserted by the second end of the center conductor 101 and the second end of the center conductor 101 can be fixedly connected to the positioning portion 1041, so that the center conductor 101 can be tightened following the movement of the positioning portion 1041 relative to the outer wall tube 102.

[0108] For the probe assembly 100 of the coaxial guided wave radar in the above embodiment, preferably, the tensioning mechanism 104 further includes a locking portion 1042 , and the locking portion 1042 is used to lock the relative positions of the outer wall tube 102 and the positioning portion 1041 .

[0109] For the probe assembly 100 of the coaxial guided wave radar of the above embodiment, preferably, a positioning hole is provided at the second end of the outer wall tube 102, and the locking portion 1042 can pass through the positioning hole to apply pressure to the locking portion 1042 to lock the relative positions of the outer wall tube 102 and the positioning portion 1041.

[0110] For the probe assembly 100 of the coaxial guided wave radar in each of the above-mentioned embodiments, one or more liquid inlet holes are provided on the outer wall tube 102 , and liquid can enter into the continuous channel between the central conductor 101 and the outer wall tube 102 through the liquid inlet holes.

[0111] For the probe assembly 100 of the coaxial guided wave radar in each of the above-mentioned embodiments, the central conductor 101 may be a metal wire, and the outer wall tube 102 may be a metal tube.

[0112] The central conductor 101 may be a metal wire, and the diameter may be 1 mm-2 mm.

[0113] The central conductor 101 may be a bent metal wire, preferably elastic, and may be any conductive metal, preferably stainless steel.

[0114] The wall thickness of the outer wall tube 102 may be about 0.5 mm to 2 mm, or may be thicker.

[0115] The insulating support wire may be a curved insulating wire, a plastic wire, and may have a diameter of 2 mm to 3 mm. The insulating support wire is preferably a solid plastic thin rod.

[0116] The probe assembly 100 of the coaxial guided wave radar disclosed in the present invention makes the wave impedance of the entire coaxial waveguide consistent by setting the insulating support line 1031, without sudden changes in wave impedance, and without generating reflected waves caused by the supporting component (insulating support part 103).

[0117] According to a coaxial guided wave radar 10 of one embodiment of the present disclosure, Figure 1 As shown, it comprises: a probe assembly 100 of any one of the above embodiments; and a radar body 200 , wherein the probe assembly 100 and the radar body 200 are sealed and connected via a sealing portion 300 .

[0118] The microwaves generated by the radar body 200 propagate along the central conductor 101 through the probe assembly 100, and are reflected when encountering the liquid surface to form an echo.

[0119] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0120] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0121] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A probe assembly of a coaxial guided wave radar, characterized in that: include: A central conductor for guiding electromagnetic waves generated by the coaxial guided wave radar for transmission and for guiding returning electromagnetic waves; An outer wall tube, wherein the outer wall tube is sleeved outside the central conductor, and the central conductor and the outer wall tube have the same extension direction; as well as an insulating support portion, the insulating support portion is made of an insulating material, the insulating support portion is disposed between the central conductor and the outer wall tube to insulate the central conductor from the outer wall tube, the insulating support portion is continuous along the extension direction of the central conductor and the extension direction of the outer wall tube, the insulating support portion forms a continuous channel between the central conductor and the outer wall tube along the extension direction of the central conductor, and the continuous channel can be passed by a liquid; The insulating support portion includes a plurality of insulating support wires, each of which is arranged in parallel, each of which is parallel to the central conductor, and a continuous channel is formed between two adjacent insulating support wires; or, the insulating support portion includes at least one insulating support wire, the insulating support wire is arranged in a spiral manner between the central conductor and the outer wall tube, and the continuous channel extends in a spiral manner between the central conductor and the outer wall tube; The probe assembly also includes: A first fixing portion and a second fixing portion, wherein the first fixing portion is used to fix the first end of each insulating support wire of the insulating support portion to the first end of the central conductor or to the first end of the outer wall tube, and the second fixing portion is used to fix the second end of each insulating support wire of the insulating support portion to the second end of the central conductor or to the second end of the outer wall tube; All cross sections of the insulating support portion perpendicular to the extending direction of the central conductor have the same shape.

2. The probe assembly of the coaxial guided wave radar according to claim 1, characterized in that: The wave impedance of the waveguide formed by the central conductor, the outer wall tube and the insulating support portion is constant or has no sudden change along the extending direction of the central conductor.

3. The probe assembly of the coaxial guided wave radar according to claim 1, characterized in that: The shapes of all cross sections of the insulating support portion perpendicular to the extending direction of the central conductor are the same as the shapes of all cross sections of the central conductor.

4. The probe assembly of the coaxial guided wave radar according to claim 1, characterized in that: The plurality of insulating support wires of the insulating support portion are evenly arranged along the circumference of the outer wall tube.

5. The probe assembly of the coaxial guided wave radar according to claim 4, characterized in that: The number of the insulating support wires is more than two.

6. The probe assembly of the coaxial guided wave radar according to claim 1, characterized in that: It also includes a tensioning mechanism, which is used to tension the central conductor.

7. The probe assembly of the coaxial guided wave radar according to claim 6, characterized in that: The tensioning mechanism includes a positioning portion, and the outer circumference of at least a part of the positioning portion is provided with an external thread, and the inner wall of the outer wall tube is provided with an internal thread, and the positioning portion can move along the axial direction of the outer wall tube through the cooperation of the external thread and the internal thread; a center hole is provided at the center of the positioning portion, and the center hole can be inserted by the second end of the center conductor and the second end of the center conductor can be fixedly connected to the positioning portion, so that the center conductor can be tightened following the movement of the positioning portion relative to the outer wall tube.

8. The probe assembly of the coaxial guided wave radar according to claim 7, characterized in that: The tensioning mechanism further includes a locking portion, and the locking portion is used to lock the relative positions of the outer wall tube and the positioning portion.

9. The probe assembly of the coaxial guided wave radar according to claim 8, characterized in that: The second end of the outer wall tube is provided with a positioning hole, and the locking portion can pass through the positioning hole to apply pressure to the locking portion to lock the relative positions of the outer wall tube and the positioning portion.

10. The probe assembly of the coaxial guided wave radar according to claim 1, characterized in that: The outer wall tube is provided with one or more liquid inlet holes, and liquid can enter into the continuous channel between the central conductor and the outer wall tube through the liquid inlet holes.

11. The probe assembly of the coaxial guided wave radar according to claim 4 or 5, characterized in that: The central conductor is a metal wire, and the outer wall tube is a metal tube.

12. The probe assembly of the coaxial guided wave radar according to claim 1, characterized in that: The number of the insulating support wire is one.

13. The probe assembly of the coaxial guided wave radar according to claim 1, characterized in that: The number of the insulating support wires is more than two.

14. The probe assembly of the coaxial guided wave radar according to claim 12 or 13, characterized in that: The winding angle between the insulating support wire and the central conductor is 45 degrees to 70 degrees.

15. The probe assembly of the coaxial guided wave radar according to claim 13, characterized in that: There is a gap between two adjacent insulating support wires to form the continuous channel.

16. A coaxial guided wave radar, characterized in that: include: The probe assembly according to any one of claims 1 to 15; as well as The radar body, the probe assembly and the radar body are sealed and connected via a sealing part.

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