CN221225003U - Novel darkroom for millimeter wave radar test - Google Patents
Novel darkroom for millimeter wave radar test Download PDFInfo
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- CN221225003U CN221225003U CN202323252191.4U CN202323252191U CN221225003U CN 221225003 U CN221225003 U CN 221225003U CN 202323252191 U CN202323252191 U CN 202323252191U CN 221225003 U CN221225003 U CN 221225003U
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- 229920005830 Polyurethane Foam Polymers 0.000 description 1
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Abstract
The utility model relates to a novel darkroom for millimeter wave radar test, which comprises a shielding room, a shielding cover and a shielding cover, wherein the shielding room is hollow and one side of the shielding room is open, and a tested radar is arranged in the shielding room; the middle part of the first frame is provided with a first opening, the first opening extends to the outer side of the first frame to form an inclined matrix, and the top end of the inclined matrix is abutted with the opening of the shielding chamber; the middle part of the at least one second frame is provided with a second opening in a penetrating way, the second frame is spaced from one side of the first frame, which is far away from the shielding chamber, and the second opening is communicated with the first opening relatively; the tail frame is plate-shaped and is opposite to the second frame at intervals and is positioned at one side of the second frame far away from the first frame, and the longitudinal section of the tail frame is larger than the longitudinal section of the second opening; and the wave absorbing layer is arranged on the inner side of the shielding room, the inclined substrate, the inner side surface of the second frame and the inner side surface of the tail frame. The novel darkroom can effectively control the radar beam in a smaller range, so that the darkroom size can be set smaller, and the requirements of general offices are met.
Description
Technical Field
The utility model relates to the technical field of millimeter wave radar testing, in particular to a novel darkroom for millimeter wave radar testing.
Background
The millimeter wave radar is a radar working in millimeter wave band detection, the frequency band is generally 30 GHz-300 GHz, the wavelength is 1-10 mm, and the millimeter wave radar is between microwaves and centimeter waves, and has some advantages of the microwave radar and the photoelectric radar. Millimeter wave radar systems are typically composed of antennas, transmitters, receivers, processors, and the like. The transmitter generates a beam of millimeter wave signals and then transmits the signals to the target object. When the signal impinges on the target object, a portion of the signal is reflected back and received by the receiver. The receiver sends the received signals to the processor for processing, so that information such as the distance, the speed, the direction, the height and the like of the target object can be obtained.
Currently, for millimeter wave radar testing, an anechoic chamber is required to simulate open fields. Because the millimeter wave beam emitted by the emitter has a larger range, a anechoic chamber with a larger size (the height is usually more than 4 meters) needs to be correspondingly manufactured, and the requirements of setting in some offices cannot be met.
Disclosure of utility model
Based on this, it is necessary to provide a novel darkroom for millimeter wave radar test that can effectively control the radar beam in a smaller range, so that the darkroom size can be set smaller, meeting the requirements of general office places, against the problem that the darkroom is larger in size and cannot adapt to the requirements of office places.
A novel darkroom for millimeter wave radar testing, comprising:
the inside of the shielding chamber is hollow and one side of the shielding chamber is open, and a radar to be tested is arranged in the shielding chamber;
The middle part of the first frame is provided with a first opening in a penetrating way, the first opening extends to the outer side of the first frame to form an inclined substrate, the longitudinal section area of the inclined substrate gradually increases from one end connected with the first opening to the other end, and one end of the inclined substrate far away from the first opening is abutted with the opening of the shielding chamber so that the first opening is relatively communicated with the opening of the shielding chamber;
The middle part of the at least one second frame is provided with a second opening in a penetrating way, the second frame and one side of the first frame far away from the shielding chamber are separated, and the second opening is communicated with the first opening relatively;
The tail frame is plate-shaped, is relatively spaced from the second frame and is positioned on one side of the second frame far away from the first frame, and the longitudinal section area of the tail frame is larger than that of the second opening;
The radar corner reflector is arranged between the tailstock and the second frame; and
The wave absorbing layer is arranged on the inner side of the shielding room, the inclined base body, the side surface of the second frame facing the first frame and the side surface of the tail frame facing the second frame.
Above-mentioned a novel darkroom for millimeter wave radar test, millimeter wave radar is placed in the shielding room, and the wave beam that the radar sent passes uncovered, first opening and the second opening in proper order in the shielding room, because be equipped with the wave absorbing layer on shielding indoor side, slope base member, second frame and the tailstock, other wave beams that do not pass are absorbed by the wave absorbing layer, pass the wave beam of second open-ended at last and hit on radar corner reflector to transmit to millimeter wave radar through radar corner reflector and receive, thereby test millimeter wave radar performance. Can be under the requirement that satisfies millimeter wave radar test's requirement, control radar wave beam in less within range effectively for darkroom size can be set to be less, satisfies general office's demand, and the wave absorbing material that needs is less simultaneously, effective reduce cost.
In one embodiment, the shielding chamber is square, and the shielding chamber is surrounded by a top plate, a bottom plate, a first side plate, a second side plate and a third side plate.
In one embodiment, a shielding door capable of being opened or closed is arranged on one side plate of the first side plate, the second side plate and the third side plate.
In one embodiment, the wave absorbing layer is adhered to the inner sides of the top plate, the bottom plate, the first side plate, the second side plate, the third side plate and the shielding door.
In one embodiment, the first opening is the same size as the second opening and is centered coaxially.
In one embodiment, two first frames are arranged at intervals, the inclined base body of one first frame is communicated with the opening of the shielding chamber, and the other first frame is consistent with the placing direction of the previous first frame.
In one embodiment, the first frame is square, and the inclined base extends along the circumferential direction of the first frame.
In one embodiment, the inclined substrate forms an acute angle with the longitudinal section, and the angle of incidence between the radar beam and the wave-absorbing layer is smaller than 30 °.
In one embodiment, the wave-absorbing layer is formed by arranging a plurality of conical wave-absorbing units.
In one embodiment, the wave absorbing unit comprises a single-layer ferrite sheet and a conical carbon-containing sponge wave absorber, and the conical carbon-containing sponge wave absorber is arranged on the single-layer ferrite sheet in a protruding mode.
Drawings
FIG. 1 is a schematic view of a first embodiment of a novel darkroom according to the present utility model;
FIG. 2 is a schematic diagram of a second embodiment of a novel darkroom according to the present utility model;
FIG. 3 is a schematic view of a third embodiment of a novel darkroom according to the present utility model.
In the drawings, the list of components represented by the various numbers is as follows:
100. novel darkroom; 1. a shielding chamber; 11. a shielding door; 2. a first frame; 21. tilting the substrate; 22. a first opening; 3. a second frame; 31. a second opening; 4. a tailstock; 5. a radar corner reflector; 6. a wave absorbing layer; 800. and the radar to be tested.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily apparent, a more particular description of the utility model briefly described above will be rendered by reference to the appended drawings. It is apparent that the specific details described below are only some of the embodiments of the present utility model and that the present utility model may be practiced in many other embodiments that depart from those described herein. Based on the embodiments of the present utility model, all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present utility model.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Referring to fig. 1 to 3, in one embodiment, a novel darkroom 100 for millimeter wave radar testing comprises: the shielding room 1, at least one first frame 2, at least one second frame 3, a tailstock 4, a radar corner reflector 5 and a wave absorbing layer 6. The shielding room 1 is hollow and one side is open, and the radar 800 to be tested is arranged in the shielding room 1. The middle part of at least one first frame 2 is penetrated and provided with a first opening 22, the first opening 22 extends to the outside of the first frame 2 to form an inclined base 21, the longitudinal section area of the inclined base 21 gradually increases from one end connected with the first opening 22 to the other end, and one end of the inclined base 21 far away from the first opening 22 is abutted with the opening of the shielding chamber 1, so that the first opening 22 is relatively communicated with the opening of the shielding chamber 1. The middle part of at least one second frame 3 is provided with a second opening 31 in a penetrating way, the second frame 3 is spaced from one side of the first frame 2 away from the shielding chamber 1, and the second opening 31 is communicated with the first opening 22 relatively. The tail stock 4 is plate-shaped, the tail stock 4 is spaced opposite to the second frame 3, and is positioned on one side of the second frame 3 away from the first frame 2, and the longitudinal section area of the tail stock 4 is larger than the longitudinal section area of the second opening 31. The radar corner reflector 5 is provided between the tailstock 4 and the second frame 3. The wave absorbing layer 6 is provided on the inner side of the shielding room 1, the inclined base 21, the side of the second frame 3 facing the first frame 2, and the side of the tailstock 4 facing the second frame 3.
The novel darkroom 100 for millimeter wave radar test is arranged in the shielding room 1, the wave beams emitted by the millimeter wave radar sequentially pass through the opening, the first opening 22 and the second opening 31 of the shielding room 1, and the wave absorbing layer 6 is arranged on the inner side of the shielding room 1, the inclined substrate 21, the second frame 3 and the tailstock 4, other wave beams which do not pass through the shielding room are absorbed by the wave absorbing layer 6, and finally the wave beams which pass through the second opening 31 are beaten on the radar corner reflector 5 and are emitted to the millimeter wave radar for receiving through the radar corner reflector 5, so that the performance of the millimeter wave radar is tested. Can be under the requirement that satisfies millimeter wave radar test's requirement, control radar wave beam in less within range effectively for darkroom size can be set to be less, satisfies general office's demand, and the wave absorbing material that needs is less simultaneously, effective reduce cost.
In one embodiment of the shielding chamber 1, the shielding chamber 1 is square, and the shielding chamber 1 is surrounded by a top plate, a bottom plate, a first side plate, a second side plate and a third side plate.
Further, a shielding door 11 capable of being opened or closed is arranged on one of the first side plate, the second side plate and the third side plate, and the shielding door 11 can facilitate operators to enter and exit the shielding chamber 1.
In one embodiment, the wave absorbing layer 6 is adhered to the inner sides of the top plate, the bottom plate, the first side plate, the second side plate, the third side plate and the shielding door 11. The shielding chamber 1, the first frame 2 and the second frame 3 may be made of a large core plate.
The first opening 22 is the same size as the second opening 31 and is centered coaxially. Of course, the second opening 31 may be smaller than the first opening 22 in the case where the radar beam is satisfied to be capable of reflection detection.
In another embodiment, two first frames 2 are arranged at intervals, the inclined base 21 of one first frame 2 is communicated with the opening of the shielding chamber 1, and the other first frame 2 is consistent with the arrangement direction of the previous first frame 2, so that radar beams can be further controlled within a certain range.
Further, in one embodiment, the second frames 3 are spaced apart by three and are centered coaxially. It will be appreciated that in actual operation, the number of first frames 2 and second frames 3 and the distance of separation need to be set according to the range of radar beam control.
In other embodiments, the included angle between the inclined substrate 21 and the longitudinal section is an acute angle, and the angle of incidence formed by the radar beam and the absorbing layer 6 is smaller than 30 °, which is more beneficial to the absorption of the radar beam by the absorbing layer 6.
In an embodiment of the wave-absorbing layer 6, the wave-absorbing layer 6 is formed by arranging a plurality of conical wave-absorbing units, and the conical wave-absorbing layer 6 on the second frame 3 can also enable the incident angle formed by the radar beam and the wave-absorbing layer 6 to be smaller than 30 degrees, which is more beneficial to the absorption of the radar beam by the wave-absorbing layer 6.
Further, the wave absorbing unit comprises a single-layer ferrite sheet and a conical carbon-containing sponge wave absorber, and the conical carbon-containing sponge wave absorber is arranged on the single-layer ferrite sheet in a protruding mode. The working frequency range of the single-layer ferrite sheet is 30 MHz-1000 MHz, and the conical carbon-containing sponge wave-absorbing material is formed by the penetration of polyurethane foam plastic in a carbon gel solution, and has better flame-retardant property.
The single target detection of the radar is carried out by using the darkroom, and the specific steps are as follows:
1) Adjusting center normals of equivalent calibers of the antenna of the radar 800 to be tested and the radar corner reflector 5 to coincide;
2) Calibrating the test system and building a test link;
3) The radar 800 under test is powered and controlled in a typical mode of operation: the radar 800 to be tested emits a radar beam, the beam is controlled in a required range through the wave absorbing material, the first opening 22 and the second opening 31, and then the beam is beaten on the radar corner reflector 5 (as a simulation target for millimeter wave radar testing) to generate a reflected beam, and the reflected beam returns to the radar 800 to be tested.
4) Rotating the tested radar 800, setting different target information (including the RCS size, distance, speed and angle), and starting a target identification test;
5) Target test data (including speed, distance, angle and RCS value information) of the radar 800 to be tested is recorded, and the data is collated according to the following formula (the distance data processing is taken as an example, and the angle, the speed and the RCS value are processed identically)
Distance measurement results:
Re＝MR±2σR
wherein: r is a test target point distance set value, R i is an i-th frame measurement distance value, R e is ranging accuracy, M R is a systematic error, and sigma R is a random error.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that modifications, substitutions and improvements can be made by those skilled in the art without departing from the spirit of the utility model, and are intended to be within the scope of the utility model. Accordingly, the protection scope of the present utility model is subject to the claims.
Claims (10)
1. A novel darkroom for millimeter wave radar test, characterized by comprising:
the inside of the shielding chamber is hollow and one side of the shielding chamber is open, and a radar to be tested is arranged in the shielding chamber;
The middle part of the first frame is provided with a first opening in a penetrating way, the first opening extends to the outer side of the first frame to form an inclined substrate, the longitudinal section area of the inclined substrate gradually increases from one end connected with the first opening to the other end, and one end of the inclined substrate far away from the first opening is abutted with the opening of the shielding chamber so that the first opening is relatively communicated with the opening of the shielding chamber;
The middle part of the at least one second frame is provided with a second opening in a penetrating way, the second frame and one side of the first frame far away from the shielding chamber are separated, and the second opening is communicated with the first opening relatively;
The tail frame is plate-shaped, is relatively spaced from the second frame and is positioned on one side of the second frame far away from the first frame, and the longitudinal section area of the tail frame is larger than that of the second opening;
The radar corner reflector is arranged between the tailstock and the second frame; and
The wave absorbing layer is arranged on the inner side of the shielding room, the inclined base body, the side surface of the second frame facing the first frame and the side surface of the tail frame facing the second frame.
2. The novel darkroom for millimeter wave radar testing of claim 1 wherein the shielding room is square and is defined by a top plate, a bottom plate, a first side plate, a second side plate and a third side plate.
3. The novel darkroom for millimeter wave radar testing according to claim 2, wherein a shielding door capable of being opened or closed is arranged on one of the first side plate, the second side plate and the third side plate.
4. The novel darkroom for millimeter wave radar testing according to claim 3, wherein the wave absorbing layer is adhered to the inner sides of the top plate, the bottom plate, the first side plate, the second side plate, the third side plate and the shielding door.
5. The novel darkroom for millimeter wave radar testing of claim 1 wherein said first opening is the same size as said second opening and is centered coaxially.
6. The novel darkroom for millimeter wave radar test according to claim 1, wherein two first frames are arranged at intervals, the inclined base body of one first frame is communicated with the opening of the shielding room, and the other first frame is consistent with the placing direction of the previous first frame.
7. The novel darkroom for millimeter wave radar testing of claim 1 wherein the first frame is square and the sloped substrate extends circumferentially of the first frame.
8. The novel darkroom for millimeter wave radar testing according to claim 1, wherein the inclined substrate forms an acute angle with the longitudinal section, and the angle of incidence between the radar beam and the wave absorbing layer is less than 30 °.
9. The novel darkroom for millimeter wave radar testing according to claim 1, wherein the wave absorbing layer is composed of a plurality of conical wave absorbing units arranged.
10. The novel darkroom for millimeter wave radar testing according to claim 9, wherein the wave absorbing unit comprises a single-layer ferrite sheet and a conical carbon-containing sponge wave absorber, and the conical carbon-containing sponge wave absorber is arranged on the single-layer ferrite sheet in a protruding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323252191.4U CN221225003U (en) | 2023-11-29 | 2023-11-29 | Novel darkroom for millimeter wave radar test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323252191.4U CN221225003U (en) | 2023-11-29 | 2023-11-29 | Novel darkroom for millimeter wave radar test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221225003U true CN221225003U (en) | 2024-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323252191.4U Active CN221225003U (en) | 2023-11-29 | 2023-11-29 | Novel darkroom for millimeter wave radar test |
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| Country | Link |
|---|---|
| CN (1) | CN221225003U (en) |
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2023
- 2023-11-29 CN CN202323252191.4U patent/CN221225003U/en active Active
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