CN111998914A - Radar level meter - Google Patents
Radar level meter Download PDFInfo
- Publication number
- CN111998914A CN111998914A CN202011066274.2A CN202011066274A CN111998914A CN 111998914 A CN111998914 A CN 111998914A CN 202011066274 A CN202011066274 A CN 202011066274A CN 111998914 A CN111998914 A CN 111998914A
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- groove
- lens antenna
- antenna
- annular
- radar level
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The radar level gauge comprises a lens antenna and a meter shell, wherein one of the lens antenna and the meter shell is provided with an annular buckle, the other one of the lens antenna and the meter shell is provided with an annular clamping groove, and the annular buckle is in clamping fit with the annular clamping groove. In the radar level meter, the lens antenna and the meter shell are directly connected and fixed through the clamping matching of the annular buckle and the annular clamping groove, and a connecting sleeve used for connecting a wave conductor and the meter shell in the prior art is omitted, so that the radar level meter is simple in structure and high in assembling efficiency. In addition, lens antenna and watchcase pass through annular buckle and ring groove and connect for lens antenna and watchcase are connected firmly, are difficult for breaking away from.
Description
Technical Field
The present disclosure relates to, but is not limited to, the field of level gauging technology, and more particularly to a radar level gauge.
Background
The radar level gauge is a measuring instrument based on the time travel principle, electromagnetic waves run at the speed of light, and when the electromagnetic waves encounter the surface of the material, the electromagnetic waves are reflected back to be received by the instrument, and the running time of the electromagnetic waves can be converted into a level signal through electronic components.
In the existing radar level gauge, the waveguide body is generally assembled and connected with the meter shell through a connecting sleeve, the connecting structure is complex, and the assembling efficiency is low.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The embodiment of the application provides a radar level meter, and its lens antenna passes through annular buckle and ring groove with the watchcase and is connected, and connection structure is simple, and assembly efficiency is high, and connects firmly, is difficult for breaking away from.
A radar level meter comprises a lens antenna and a meter shell, wherein one of the lens antenna and the meter shell is provided with an annular buckle, the other one of the lens antenna and the meter shell is provided with an annular clamping groove, and the annular buckle is in clamping fit with the annular clamping groove.
In the radar level meter, the lens antenna and the meter shell are directly connected and fixed through the clamping matching of the annular buckle and the annular clamping groove, a connecting sleeve used for connecting a wave conductor and the meter shell in the prior art is omitted, the structure is simple, and the assembly efficiency is high. In addition, lens antenna and watchcase pass through annular buckle and ring groove and connect for lens antenna and watchcase are connected firmly, are difficult for breaking away from.
Other features and advantages of the present application will be set forth in the description that follows.
Drawings
FIG. 1 is an exploded schematic view of a radar level gauge according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of the radar level gauge shown in FIG. 1;
FIG. 3 is an exploded view of a lens antenna and a case of the radar level gauge shown in FIG. 1;
FIG. 4 is a schematic view of a lens antenna of the radar level gauge shown in FIG. 1;
FIG. 5 is a schematic cross-sectional view of a radar level gauge according to another embodiment of the present application;
FIG. 6 is an exploded view of the lens antenna and the gauge case of the radar level gauge shown in FIG. 5.
The reference signs are:
1-lens antenna, 11-antenna housing, 111-annular buckle, 112-rotation stop lug, 113-guide lug, 114-stop part, 115-first guide surface, 12-antenna insert, 121-conical loading section, 122-cylindrical section, 123-spherical section, 124-first step surface, 125-second step surface, 2-watch case, 21-annular clamping groove, 211-clamping surface, 212-bottom wall, 213-second guide surface, 22-rotation stop groove, 23-guide groove, 3-circuit board assembly, 4-waveguide body, 41-waveguide path.
Detailed Description
Embodiments of the present application will be described below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
As shown in fig. 1-4, the present application provides a radar level gauge, which includes a lens antenna 1 and a case 2, one of the lens antenna 1 and the case 2 is provided with a ring-shaped buckle 111, and the other is provided with a ring-shaped clamping groove 21, and the ring-shaped buckle 111 is in clamping fit with the ring-shaped clamping groove 21.
In the radar level meter, the lens antenna 1 and the meter shell 2 are respectively provided with the annular buckle 111 and the annular clamping groove 21, and the lens antenna 1 and the meter shell 2 are directly connected and fixed through the clamping matching of the annular buckle 111 and the annular clamping groove 21. Compared with the scheme that the wave conductor 4 and the meter shell 2 are connected and fixed through the connecting sleeve in the prior art, the radar level meter of the embodiment of the application directly fixes the lens antenna 1 and the meter shell 2, the connecting sleeve is omitted, the structure of the radar level meter is simplified, and the assembly efficiency of the radar level meter is improved.
In addition, compare with the ordinary buckle that sets up through a plurality of intervals and a plurality of draw-in grooves or ring slot joint, lens antenna 1 and watchcase 2 are connected through ring buckle 111 and ring slot 21 for lens antenna 1 and watchcase 2's connection is firm, is difficult for breaking away from.
When carrying out the impact experiment to radar level meter, appear warping easily when watchcase 2 and lens antenna 1 adopt ordinary buckle joint, lead to appearing the gap between watchcase 2 and the lens antenna 1, watchcase 2 breaks away from with lens antenna 1 easily for watchcase 2 or lens antenna 1 receive the collision back two and break away from easily when the installation, irritate behind the epoxy glue connection effect improvement between watchcase 2 and lens antenna 1. But watchcase 2 and lens antenna 1 adopt ring groove 21 and ring buckle 111 joint cooperation, when carrying out the impact experiment, watchcase 2 and lens antenna 1's firm in connection are difficult for breaking away from, have improved radar level meter's shock resistance.
In some exemplary embodiments, as shown in fig. 1 to 4, the ring clip 111 is provided on the lens antenna 1, the ring slot 21 is provided on an inner side wall of the case 2, and the ring clip 111 is snapped into the ring slot 21 from bottom to top.
As shown in fig. 1 to 4, the ring buckle 111 is disposed on the upper portion of the lens antenna 1, the ring slot 21 is disposed on the inner side wall of the case 2, and when the lens antenna 1 is connected to the case 2, the lens antenna 1 passes through the opening on the lower portion of the case 2 and moves upward, so that the ring buckle 111 is buckled with the ring slot 21, and the lower end of the lens antenna 1 extends into the case 2.
Of course, the ring clip 111 may be provided at the lower portion of the case 2, and the ring-shaped card slot 21 may be provided on the inner side wall surface of the lens antenna 1. The ring-shaped card slot 21 may be provided on an inner side wall surface of the lens antenna 1 or the case 2, or may be provided on an outer side wall surface of the lens antenna 1 or the case 2.
In some exemplary embodiments, as shown in fig. 3, annular clamping groove 21 includes an annular clamping surface 211 for clamping engagement with annular clamp 111, and an inner diameter of clamping surface 211 is 1mm to 3mm smaller than a maximum outer diameter of annular clamp 111.
As shown in fig. 3, the annular clip 111 is disposed on the upper portion of the lens antenna 1, the annular card slot 21 is disposed on the inner side wall surface of the case 2, the annular clip 111 is in snap fit with the snap-fit surface 211 of the annular card slot 21 (the lower inner wall surface of the annular card slot 21), the snap-fit surface 211 is annular, and the inner diameter of the snap-fit surface 211 is equal to the inner diameter of the snap-fit surface 211
Smaller than the maximum outer diameter of the ring-shaped buckle 111
And the difference between the two is 1mm-3 mm.
When the ring slot 21 is matched with the ring buckle 111, the ring buckle 111 faces inwardsCompression deformation is difficult, and the outward tensile deformation of ring slot 21 is easy, so when ring buckle 111 and ring slot 21 cooperate, watchcase 2 takes place to warp for ring buckle 111 can pass through annular joint face 211 upward movement to ring slot 21 in. Inner diameter of the engagement surface 211
Maximum outer diameter of annular snap 111
The difference between the two is 1mm-3mm, which can ensure that the annular buckle 111 can be clamped into the annular clamping groove 21 through the clamping surface 211 after the deformation of the watch case 2, and on the other hand, the annular buckle 111 and the clamping surface 211 are firmly matched to prevent the annular buckle 111 from being separated from the annular clamping groove 21.
Of course,
and
the difference between the two can be set to be out of the range of 1mm-3mm, such as less than 1mm, or more than 3mm according to actual requirements.
In some exemplary embodiments, as shown in FIG. 3, a wall thickness T of bottom wall 212 of ring slot 21 (opposite the opening of ring slot 21) is 1mm to 4mm, e.g., T may be 2mm or 2.5 mm.
The wall thickness T of the bottom wall 212 of the ring slot 21 is 1mm-4mm, so that in the process of clamping the ring buckle 111 and the ring slot 21, the bottom wall 212 of the ring slot 21 can deform outward due to the extrusion force of the ring buckle 111, and the ring buckle 111 can be clamped into the ring slot 21 through the clamping surface 211. Furthermore, the wall thickness of bottom wall 212 of ring groove 21 is 1mm to 4mm, ensuring sufficient structural strength of case 2.
In some exemplary embodiments, as shown in fig. 3, the annular buckle 111 may be provided with a first guide surface 115, and the first guide surface 115 may be a conical surface.
In some exemplary embodiments, as shown in fig. 3, a second guide surface 213 may be provided on an inner side wall surface of case 2, second guide surface 213 may be located on a lower side of click surface 211, and second guide surface 213 may be a conical surface.
The first guide surface 115 and/or the second guide surface 213 are/is provided to facilitate the engagement operation of the ring latch 111 with the ring slot 21.
In some exemplary embodiments, the lens antenna 1 may be made of a plastic material such as PP (Polypropylene), PVDF (polyvinylidene Fluoride), FEP (Fluorinated ethylene propylene copolymer), or PFA (polytetrafluoroethylene).
In some exemplary embodiments, case 2 is made of plastic or metal.
The case 2 may be made of the same material as the lens antenna 1 (in this case, the lens antenna is a one-piece structure made of the same material) or the antenna housing 11 of the lens antenna 1 (in this case, the lens antenna 1 includes the antenna housing 11 and the antenna insert 12, which will be described in detail later), or may be made of a different material from the lens antenna 1 or the antenna housing 11 of the lens antenna 1. Such as: the watch case 2 can be made of ABS (acrylonitrile-styrene-butadiene copolymer). The watch case 2 can be formed by injection molding, and the ring-shaped clamping groove 21 can be machined by turning.
In some exemplary embodiments, as shown in fig. 1-4, one of the lens antenna 1 and the case 2 is provided with a rotation stop protrusion 112, and the other is provided with a rotation stop groove 22 positioned to match the rotation stop protrusion 112.
The lens antenna 1 and the watch case 2 are circumferentially fixed by the engagement of the rotation stop projection 112 and the rotation stop groove 22.
In some exemplary embodiments, as shown in fig. 1 to 4, one of the lens antenna 1 and the case 2 is provided with a guide projection 113, and the other is provided with a guide groove 23 which is guided in cooperation with the guide projection 113.
The guiding protrusion 113 is matched with the guiding groove 23, so that the guiding function can be achieved in the assembling process of the lens antenna 1 and the watch case 2, and the rotation stopping protrusion 112 and the rotation stopping groove 22 can be aligned and matched conveniently. In addition, the guide projection 113, in cooperation with the guide groove 23, also functions to fix the lens antenna 1 circumferentially to the case 2.
In some exemplary embodiments, as shown in fig. 1 to 4, the lens antenna 1 is provided with a rotation stop protrusion 112 and a guide protrusion 113, and an upper end surface of the guide protrusion 113 is higher than an upper end surface of the rotation stop protrusion 112.
Correspondingly, a rotation stopping groove 22 and a guide groove 23 are arranged in the watch case 2, and the lower end face of the guide groove 23 is not higher than the lower end face of the rotation stopping groove 22; alternatively, the lower end surface of the guide groove 23 is higher than the lower end surface of the rotation stop groove 22, and the height difference between the lower end surface of the guide groove 23 and the lower end surface of the rotation stop groove 22 is smaller than the height difference between the upper end surface of the guide projection 113 and the upper end surface of the rotation stop projection 112.
The upper end face of the guide projection 113 on the lens antenna 1 is higher than the upper end face of the rotation stop projection 112, the lower end face of the guide groove 23 in the case 2 is not higher than the lower end face of the rotation stop groove 22, or, in the case that the lower end face of the guide groove 23 is higher than the lower end face of the rotation stop groove 22, the height difference between the lower end face of the guide groove 23 and the lower end face of the rotation stop groove 22 is smaller than the height difference between the upper end face of the guide projection 113 and the upper end face of the rotation stop projection 112, so that in the process of assembling the lens antenna 1 into the case 2 from bottom to top, the guide projection 113 first contacts the guide groove 23 to guide the assembling of the lens antenna 1 so that the rotation stop projection is fitted with the rotation stop groove 22.
As shown in fig. 1 to 4, the upper portion of the annular buckle 111 of the lens antenna 1 is provided with two guide protrusions 113 protruding upward and two rotation stop protrusions 112 protruding upward, and the guide protrusions 113 and the rotation stop protrusions 112 are alternately arranged along the circumferential direction of the lens antenna 1, and the upper end surfaces of the guide protrusions 113 are higher than the upper end surfaces of the rotation stop protrusions 112. Correspondingly, two rotation stopping grooves 22 and two guide grooves 23 are arranged in the watch case 2, the guide grooves 23 and the rotation stopping grooves 22 are both positioned above the ring-shaped clamping groove 21, the lower end faces of the guide grooves 23 and the rotation stopping grooves 22 are approximately flush with the upper end face of the ring-shaped clamping groove 21, and the upper end face of the guide groove 23 is higher than the upper end face of the rotation stopping grooves 22.
In some exemplary embodiments, the guide projection 113 includes a plurality of (not less than two), and the extending widths of the at least two guide projections 113 in the circumferential direction of the lens antenna 1 or the case 2 are different.
The at least two guide projections 113 have different extension widths in the circumferential direction of the lens antenna 1 or the case 2, and can perform a fool-proof function and position the lens antenna 1 in the circumferential direction.
As shown in fig. 1 and 4, the two guide projections 113 on the lens antenna 1 have different extending widths in the circumferential direction of the lens antenna 1. Accordingly, the two detent grooves 22 in the case 2 have different extending widths in the circumferential direction of the case 2 so as to fit the two guide projections 113.
In some exemplary embodiments, as shown in fig. 1 to fig. 3, the lens antenna 1 includes an antenna housing 11 and an antenna insert 12, the antenna housing 11 and the antenna insert 12 are integrally formed by insert injection, and the antenna housing 11 is provided with a ring-shaped buckle 111 (or a ring-shaped slot 21).
The antenna housing 11 and the antenna insert 12 are formed by an insert injection molding process, so that the lens antenna 1 does not need to be integrally formed by turning a rod-shaped material, the manufacturing cost of the lens antenna 1 is reduced, and the manufacturing efficiency of the lens antenna 1 is improved.
In some exemplary embodiments, the antenna insert 12 is made of Polytetrafluoroethylene (PTFE), and the antenna housing 11 is made of FEP or PFA, which may be injection molded.
In some exemplary embodiments, the annular snap 111 may be integrally formed on the antenna housing 11.
In some exemplary embodiments, as shown in fig. 1 to fig. 3, a first step surface 124 is formed on an outer side wall surface of the antenna insert 12, a stopping portion 114 is provided on the antenna housing 11, and the stopping portion 114 cooperates with the first step surface 124 for limiting.
The first step surface 124 of the antenna insert 12 is matched with the stopper portion 114 of the antenna housing 11, so that the fixing firmness between the antenna insert 12 and the antenna housing 11 can be improved, and the antenna insert 12 and the antenna housing 11 are prevented from being separated.
In some exemplary embodiments, as shown in fig. 2 and 3, the antenna insert 12 includes a conical loading section 121, a cylindrical section 122, and a spherical section 123, which are sequentially disposed, and a first step surface 124 is formed between the cylindrical section 122 and the spherical section 123.
As shown in fig. 2 and 3, on the antenna insert 12, the conical loading section 121, the cylindrical section 122 and the spherical section 123 are sequentially arranged from top to bottom. The radar level gauge further comprises a circuit board assembly 3 and a waveguide 4, the circuit board assembly 3 being located above the waveguide 4, the tapered loading section 121 of the antenna insert 12 being extendable into the waveguide 41 of the waveguide 4 such that electromagnetic waves radiated by the radiating element of the circuit board assembly 3 enter the lens antenna 1 from the waveguide 41. The lower portion of the waveguide 4 is sleeved outside the cylindrical section 122 of the antenna insert 12, and a wave-absorbing material (not shown in the figure) may be disposed between the waveguide 4 and the cylindrical section 122 of the antenna insert 12. The antenna housing 11 includes a spherical portion located at the lower portion, the spherical portion is wrapped outside the spherical section 123 of the antenna insert 12, the stopper portion 114 is disposed above the spherical portion, and the lower end surface of the stopper portion 114 abuts against the first step surface 124. A sealing member (not shown) may be disposed between the lower end surface of the waveguide 4 and the first step surface 124, so as to prevent the sealing glue from filling the wave-absorbing material between the waveguide 4 and the cylindrical section 122 when the antenna housing 11 is filled with the glue.
In other exemplary embodiments, as shown in fig. 5 and 6, the antenna insert 12 includes a conical loading section 121, a cylindrical section 122 and a spherical section 123, which are sequentially arranged, one end of the spherical section 123 close to the cylindrical section 122 is provided with a first step surface 124, and a second step surface 125 is formed between the cylindrical section 122 and the spherical section 123.
As shown in fig. 5 and 6, on the antenna insert 12, the conical loading section 121, the cylindrical section 122 and the spherical section 123 are sequentially arranged from top to bottom. The radar level gauge further comprises a circuit board assembly 3 and a waveguide 4, the circuit board assembly 3 being located above the waveguide 4, the tapered loading section 121 of the antenna insert 12 being extendable into the waveguide 41 of the waveguide 4 such that electromagnetic waves radiated by the radiating element of the circuit board assembly 3 enter the lens antenna 1 from the waveguide 41. The lower portion of the waveguide 4 is sleeved outside the cylindrical section 122 of the antenna insert 12, and a wave-absorbing material (not shown in the figure) may be disposed between the waveguide 4 and the cylindrical section 122 of the antenna insert 12. The antenna housing 11 includes a lower spherical portion that wraps around the spherical section 123 of the antenna insert 12. The upper end of the spherical segment 123 is formed with a first step surface 124, and the lower end surface of the stopper 114 abuts against the first step surface 124. A sealing member (not shown) may be disposed between the lower end surface of the waveguide 4 and the second step surface 125 to prevent the sealing compound from filling the wave-absorbing material between the waveguide 4 and the cylindrical section 122 when the antenna housing 11 is filled with the glue.
The above examples only express exemplary embodiments of the present application, and the description thereof is more specific and detailed, but the contents are only the embodiments adopted for understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.
Claims (10)
1. The radar level gauge is characterized by comprising a lens antenna and a meter shell, wherein one of the lens antenna and the meter shell is provided with an annular buckle, the other one of the lens antenna and the meter shell is provided with an annular clamping groove, and the annular buckle is in clamping fit with the annular clamping groove.
2. The radar level gauge according to claim 1, wherein said annular clamping groove comprises an annular clamping surface for clamping engagement with said annular snap, said clamping surface having an inner diameter which is 1mm-3mm smaller than the largest outer diameter of said annular snap.
3. The radar level gauge according to claim 1, wherein the wall thickness of the bottom wall of said ring groove is 1-4 mm.
4. The radar level gauge according to any one of claims 1 to 3, wherein said annular snap is provided on said lens antenna, said annular snap groove is provided on an inner sidewall of said gauge case, said annular snap is snapped into said annular snap groove from bottom to top.
5. Radar level gauge according to any one of claims 1 to 3, characterised in that the lens antenna is made of PP, PVDF, FEP or PFA and the gauge case is made of plastic or metal.
6. Radar level gauge according to any one of claims 1 to 3, wherein one of the lens antenna and the gauge housing is provided with a rotation stop lug and the other is provided with a rotation stop recess co-located with the rotation stop lug.
7. The radar level gauge according to claim 6, wherein one of said lens antenna and said gauge case is provided with a guide projection and the other is provided with a guide groove for guiding in cooperation with said guide projection.
8. The radar level gauge according to claim 7, wherein said rotation stop protrusion and said guide protrusion are provided on said lens antenna, and an upper end surface of said guide protrusion is higher than an upper end surface of said rotation stop protrusion,
the meter shell is internally provided with the rotation stopping groove and the guide groove, and the lower end surface of the guide groove is not higher than that of the rotation stopping groove; or the lower end surface of the guide groove is higher than the lower end surface of the rotation stopping groove, and the height difference between the lower end surface of the guide groove and the lower end surface of the rotation stopping groove is smaller than the height difference between the upper end surface of the guide bump and the upper end surface of the rotation stopping bump.
9. The radar level gauge according to claim 7, wherein said guide projection comprises a plurality of projections, and at least two of said projections have different extension widths in a circumferential direction of said lens antenna or said gauge case.
10. The radar level gauge according to any one of claims 1 to 3, wherein said lens antenna comprises an antenna housing and an antenna insert, said antenna housing and said antenna insert being integrally formed by insert injection molding, said antenna housing being provided with said annular snap or said annular snap groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011066274.2A CN111998914A (en) | 2020-09-30 | 2020-09-30 | Radar level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011066274.2A CN111998914A (en) | 2020-09-30 | 2020-09-30 | Radar level meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111998914A true CN111998914A (en) | 2020-11-27 |
Family
ID=73475060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011066274.2A Pending CN111998914A (en) | 2020-09-30 | 2020-09-30 | Radar level meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111998914A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821036A (en) * | 2021-02-09 | 2021-05-18 | 北京古大仪表有限公司 | Radar level meter |
| CN112909502A (en) * | 2021-02-08 | 2021-06-04 | 北京古大仪表有限公司 | Radar level meter |
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| CN101424562A (en) * | 2008-12-04 | 2009-05-06 | 深圳太辰光通信有限公司 | Essential explosion-proof liquid level detection device and method |
| CN107143791A (en) * | 2017-07-14 | 2017-09-08 | 浙江铭洋照明科技股份有限公司 | One kind is without screw modularization panel light |
| CN206832328U (en) * | 2017-04-18 | 2018-01-02 | 广东奥迪威传感科技股份有限公司 | Urea level ultrasonic sensor |
| US20190145813A1 (en) * | 2017-11-14 | 2019-05-16 | Vega Grieshaber Kg | Fill Level Measurement Device with Potential Isolation in a Waveguide |
| CN210664664U (en) * | 2019-10-30 | 2020-06-02 | 北京锐达仪表有限公司 | Radar level meter with antenna protection casing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6674412B1 (en) * | 1999-09-03 | 2004-01-06 | Robert Bosch Gmbh | Housing or part thereof for distance sensor |
| CN101424562A (en) * | 2008-12-04 | 2009-05-06 | 深圳太辰光通信有限公司 | Essential explosion-proof liquid level detection device and method |
| CN206832328U (en) * | 2017-04-18 | 2018-01-02 | 广东奥迪威传感科技股份有限公司 | Urea level ultrasonic sensor |
| CN107143791A (en) * | 2017-07-14 | 2017-09-08 | 浙江铭洋照明科技股份有限公司 | One kind is without screw modularization panel light |
| US20190145813A1 (en) * | 2017-11-14 | 2019-05-16 | Vega Grieshaber Kg | Fill Level Measurement Device with Potential Isolation in a Waveguide |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112909502A (en) * | 2021-02-08 | 2021-06-04 | 北京古大仪表有限公司 | Radar level meter |
| CN112821036A (en) * | 2021-02-09 | 2021-05-18 | 北京古大仪表有限公司 | Radar level meter |
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