CN210005079U - frequency modulation continuous wave radar high precision level meter - Google Patents
frequency modulation continuous wave radar high precision level meter Download PDFInfo
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- CN210005079U CN210005079U CN201921114551.5U CN201921114551U CN210005079U CN 210005079 U CN210005079 U CN 210005079U CN 201921114551 U CN201921114551 U CN 201921114551U CN 210005079 U CN210005079 U CN 210005079U
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Abstract
The utility model discloses an frequency modulation continuous wave radar high accuracy level meter, which comprises a housin, microwave transceiver system board and antenna house, be equipped with the screw post in the casing, and microwave transceiver system board passes through the screw post to be fixed at the casing inner chamber, the antenna house fixed orifices has been seted up on the antenna house, and the antenna house passes through the antenna house fixed orifices and is physically with the casing assembly, be provided with master control circuit on the microwave transceiver system board, microstrip array antenna and radio frequency circuit set up on the same of microwave transceiver system board is on the surface, master control circuit sets up in addition that microwave transceiver system board is relative on the surface, two sets of array antenna group are connected with the radio frequency circuit electricity respectively, the utility model discloses a radar high accuracy level meter passes through microwave transceiver system board rational design to be blocks of material level veneers and through compact product structural design, has realized that the assembly is simple, durable, and is small-.
Description
Technical Field
The utility model relates to a frequency modulation continuous wave radar technical field specifically is kinds of frequency modulation continuous wave radar high accuracy level meters.
Background
The frequency modulation continuous wave radar is characterized by non-contact, quick and stable measurement, high accuracy and simple and convenient maintenance, continuously transmits microwaves with linearly changed frequencies in frequency modulation periods through a microwave receiving and transmitting antenna, receives reflected microwaves and the space distance between the radar and a target, so that frequency differences exist between the currently transmitted microwave frequency and the reflected microwave frequency, extracts the intermediate frequency signal, and converts the intermediate frequency signal to obtain the corresponding target distance.
But most frequency modulation continuous wave radar of current market adopts independent antenna, and its scheme with radio frequency front end circuit board, main control board separation design leads to antenna structure assembly complicated, and the size is big, the problem that the overall cost is high, based on this, the utility model designs kinds of frequency modulation continuous wave radar high accuracy level meter to solve above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide kinds of frequency modulation continuous wave radar high accuracy level meters to solve above-mentioned technical problem.
In order to achieve the purpose, the utility model provides a kinds of frequency modulation continuous wave radar high accuracy level meters, including casing, microwave receiving and dispatching system board and antenna house, be equipped with the screw post in the casing, and the microwave receiving and dispatching system board passes through the screw post to be fixed at the casing inner chamber, antenna house fixed orifices has been seted up on the antenna house, and the antenna house passes through the antenna house fixed orifices and the casing assembly becomes physically;
the microwave transceiving system board is provided with a master control circuit, a microstrip array antenna and a radio frequency circuit, the microstrip array antenna and the radio frequency circuit are arranged on the same surface of the microwave transceiving system board, and the master control circuit is arranged on the other surface of the microwave transceiving system board opposite to the surface;
the microstrip array antenna comprises two array antenna groups which have the same structure and are mutually connected in parallel, and the two array antenna groups are respectively and electrically connected with a radio frequency circuit.
Preferably, the array antenna group comprises a plurality of array antennas which have the same structure and are arranged in an array, each array antenna comprises four antenna units which have the same structure and a microstrip parallel branch structure, and the four antenna units are respectively connected with the microstrip parallel branch structure.
Preferably, the radio frequency circuit comprises two antenna port impedance matching circuits with the same structure and a frequency modulated continuous wave processing chip, and the two array antenna groups are respectively and electrically connected with the frequency modulated continuous wave processing chip through the corresponding antenna port impedance matching circuits.
Preferably, the top of the shell is provided with a horizontal bubble and an aviation plug.
Preferably, the horizontal bubble is provided with a plurality of groups of fixing screw holes.
Preferably, when the microwave transceiver system board is installed, the board facing the housing is a master control circuit, and the board facing the radome is a microstrip array antenna and a radio frequency circuit.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a set up neotype microwave receiving and dispatching system board, set up master control circuit at microwave receiving and dispatching system board, microstrip array antenna and radio frequency circuit, microstrip array antenna includes two array antenna groups that the structure is the same and mutual parallel connection, two array antenna groups are connected with the radio frequency circuit electricity respectively, make microstrip array antenna can carry out the transmission and the receipt of signal respectively alone, two array antenna groups adopt parallel connection's design mode through the equal power distribution/synthetic circuit such as equidimension, can realize the transmission of transmitted signal/received signal between radio frequency circuit and array antenna group, the radar high accuracy level meter of this scheme design rationally designs into veneers and through compact product structural design through microwave receiving and dispatching system board, the assembly is simple, durable, small-size light, low-cost use product.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram 1 of the present invention;
fig. 2 is a schematic structural diagram 2 of the present invention;
fig. 3 is a schematic diagram of a parallel branch structure and an antenna unit of the microstrip array antenna of the present invention;
fig. 4 is a schematic diagram of a microstrip array antenna structure according to the present invention;
fig. 5 is a radiation diagram of the microstrip array antenna of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
the antenna comprises a shell 1, a microwave transceiving system board 2, an antenna housing 3, an antenna housing fixing hole 4, a microstrip array antenna 5, an antenna unit 6, a microstrip parallel branch structure 7, an antenna port impedance matching circuit 8, a frequency modulation continuous wave processing chip 9, a horizontal bubble 10, a fixing screw hole 1001 and an aviation plug 11.
Detailed Description
The technical solution in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of , but not all embodiments.
Referring to fig. 1-5, the utility model provides technical solutions, wherein the frequency modulated continuous wave radar high-precision level meter comprises a shell 1, a microwave transceiver system board 2 and an antenna housing 3, a screw post is arranged in the shell 1, the microwave transceiver system board 2 is fixed in the inner cavity of the shell 1 through the screw post, an antenna housing fixing hole 4 is arranged on the antenna housing 3, and the antenna housing 3 is assembled with the shell 1 into a body through the antenna housing fixing hole 4;
the microwave transceiving system board 2 is provided with a master control circuit, a microstrip array antenna 5 and a radio frequency circuit, the microstrip array antenna 5 and the radio frequency circuit are arranged on the same surface of the microwave transceiving system board 2, and the master control circuit is arranged on the other surface opposite to the surface of the microwave transceiving system board 2 ;
the microstrip array antenna 5 comprises two array antenna groups which have the same structure and are mutually connected in parallel, and the two array antenna groups are respectively and electrically connected with the radio frequency circuit.
Specifically, the array antenna group comprises a plurality of array antennas which are the same in structure and are arranged in an array mode, each array antenna comprises four antenna units 6 which are the same in structure and a microstrip parallel branch structure 7, and the four antenna units 6 are connected with the microstrip parallel branch structures 7 respectively, so that the array antenna which is small in size and good in effect is formed.
Specifically, the radio frequency circuit comprises two antenna port impedance matching circuits 8 and a frequency modulated continuous wave processing chip 9 which are identical in structure, and the two array antenna groups are respectively and electrically connected with the frequency modulated continuous wave processing chip 9 through the corresponding antenna port impedance matching circuits 8, so that the loss between the frequency modulated continuous wave processing chip and the microstrip array antenna can be reduced through the antenna port impedance matching circuits, and good transmission of signals is realized.
Specifically, a horizontal bubble 10 and an aviation plug 11 are mounted on the top of the shell 1, the level bubble can facilitate the placement of the level gauge, and the aviation plug is arranged so that the level gauge can be conveniently connected with external equipment.
Specifically, the horizontal bulb 10 is provided with a plurality of sets of fixing screw holes 1001 so as to be conveniently fixed to an external bracket.
Specifically, when the microwave transceiver system board 2 is installed, the board towards the casing 1 is main control circuit, and the board towards the antenna housing 3 is microstrip array antenna 5 and radio frequency circuit, so that the high-frequency microwave circuit is located on the board towards the antenna housing of the microwave transceiver system board, therefore the PCB needs not to use a high-frequency microwave board for surfaces in addition, only needs a common FR4 board, simplifies the circuit design, and reduces the comprehensive cost of the PCB.
The specific application examples of this embodiment are:
the center frequency of the frequency-modulated continuous wave radar high-precision level gauge of the embodiment is 24GHz, and the system working bandwidth is 6 GHz.
Fig. 1 and 2 are schematic structural diagrams of frequency modulated continuous wave radar products in two directions, in the diagrams, a shell 1 is made of aluminum materials, is light and durable, and can shield interference signals, an aviation plug 11 and a horizontal bulb 10 with a waterproof effect are assembled on the shell 1, and can be conveniently fixed with an external support through a fixing screw hole 1001, then a microwave transceiver system board 2 is installed in an inner cavity of the shell 1 through screw columns, and specific fixing positions of the board can be fixed and adjusted through the screw columns with different lengths, after installation, the board surface of the microwave transceiver system board 2 facing the shell 1 is a main control circuit part, the board surface facing an antenna housing 3 comprises a microstrip array antenna 5 and a radio frequency circuit part, so that high-frequency microwave circuits are all located on the board surface of the microwave transceiver system board 2 facing the antenna housing, therefore, a high-frequency microwave board does not need to be used on the other surface of the PCB board, only a common FR4 board is needed, meanwhile, the circuit design is simplified, the comprehensive cost of the PCB board is reduced, finally, the antenna housing 3 is assembled with the shell 1 through the fixing hole 4 to form a body, the material of the PCB board can be made of a common FR.
Fig. 3 is a schematic diagram of a microstrip array antenna parallel branch structure and antenna units, and 4 microstrip antenna units 6 are connected and arrayed through a microstrip parallel branch structure 7, so as to form a small-sized and effective microstrip array antenna. The two groups of array antennas connected in parallel can respectively and independently transmit and receive signals, and meanwhile, transmission of transmitted signals/received signals between the radio frequency circuit and the antenna unit can be realized through the equal-amplitude and equal-phase power distribution/synthesis circuit.
Fig. 4 is a schematic diagram of a microstrip array antenna structure, and the four-element microstrip antenna array in fig. 3 is expanded to form a receiving antenna and a transmitting antenna and two symmetrical microstrip array antennas 5 connected in parallel, wherein, when the antenna is designed, in order to reduce the size of the antenna, the impedance of 87.5 Ω is selected as a transmission line in the microstrip array antenna, so that an antenna port impedance matching circuit 8 is designed in an antenna input/output port in order to match with the 50 Ω impedance of a frequency modulated continuous wave processing chip 9, and good signal transmission is realized.
Fig. 5 is a radiation diagram of an antenna of a frequency modulated continuous wave radar product, and it can be seen from the diagram that the microstrip array antenna designed by the scheme has higher main lobe gain and lower side lobe level.
In the description of the present invention, it should be understood that the terms "coaxial", "bottom", " end", "top", "middle", " end", "up", " side", "top", "inner", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the drawings, which are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention.
In the present invention, unless otherwise explicitly specified or limited, the terms "mounting," "setting," "connecting," "fixing," "screwing" and the like shall be understood as , for example, they may be fixedly connected, detachably connected, or , mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, connected inside two elements or interacting relationship between two elements, and unless otherwise explicitly specified or limited, those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
- The high-precision level meter for the frequency-modulated continuous wave radar is characterized by comprising a shell (1), a microwave transceiving system board (2) and an antenna housing (3), wherein a screw column is arranged in the shell (1), the microwave transceiving system board (2) is fixed in an inner cavity of the shell (1) through the screw column, an antenna housing fixing hole (4) is formed in the antenna housing (3), and the antenna housing (3) is assembled with the shell (1) into a body through the antenna housing fixing hole (4);the microwave transceiving system board (2) is provided with a master control circuit, a microstrip array antenna (5) and a radio frequency circuit, the microstrip array antenna (5) and the radio frequency circuit are arranged on the same surface of the microwave transceiving system board (2), and the master control circuit is arranged on the other surface opposite to the surface of the microwave transceiving system board (2);the microstrip array antenna (5) comprises two array antenna groups which have the same structure and are mutually connected in parallel, and the two array antenna groups are respectively and electrically connected with a radio frequency circuit.
- 2. The frequency-modulated continuous wave radar high-precision level gauge according to claim 1, wherein the array antenna set comprises a plurality of array antennas with the same structure and arranged in an array, the array antennas comprise four antenna units (6) with the same structure and a microstrip parallel branch structure (7), and the four antenna units (6) are respectively connected with the microstrip parallel branch structure (7).
- 3. The types of FM continuous wave radar high-precision level gauge according to claim 1, wherein said RF circuitry comprises two antenna port impedance matching circuits (8) and an FM continuous wave processing chip (9) with the same structure, and two said array antenna sets are electrically connected to the FM continuous wave processing chip (9) through the corresponding antenna port impedance matching circuits (8).
- 4. A frequency-modulated continuous wave radar high precision level gauge according to claim 1, wherein a level bubble (10) and an air plug (11) are mounted on the top of the housing (1).
- 5. The frequency-modulated continuous wave radar high-precision level gauge according to claim 4, wherein the level bubble (10) is provided with a plurality of sets of set screw holes (1001).
- 6. kinds of frequency modulation continuous wave radar high precision level gauge according to claim 1, wherein, when installing, the microwave transceiver system board (2) is the master control circuit facing the surface of the case (1), and the antenna cover (3) is the microstrip array antenna (5) and the radio frequency circuit facing the surface of the antenna cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921114551.5U CN210005079U (en) | 2019-12-13 | 2019-12-13 | frequency modulation continuous wave radar high precision level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921114551.5U CN210005079U (en) | 2019-12-13 | 2019-12-13 | frequency modulation continuous wave radar high precision level meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210005079U true CN210005079U (en) | 2020-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921114551.5U Active CN210005079U (en) | 2019-12-13 | 2019-12-13 | frequency modulation continuous wave radar high precision level meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210005079U (en) |
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2019
- 2019-12-13 CN CN201921114551.5U patent/CN210005079U/en active Active
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