CN212367282U - Wireless performance testing device and testing system - Google Patents
Wireless performance testing device and testing system Download PDFInfo
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- CN212367282U CN212367282U CN202022057849.6U CN202022057849U CN212367282U CN 212367282 U CN212367282 U CN 212367282U CN 202022057849 U CN202022057849 U CN 202022057849U CN 212367282 U CN212367282 U CN 212367282U
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Abstract
The present disclosure provides a test apparatus and a test system for wireless performance, wherein the test apparatus includes: testing the antenna; the scanning mechanism is used for controlling the test antenna to reach a plurality of preset test points; and at least one universal joint arranged on the scanning mechanism, wherein the universal joint is suitable for installing the test antenna and is used for controlling the test antenna to point to a target position or/and controlling the test antenna to rotate to reach a preset polarization direction for each test point.
Description
Technical Field
The utility model relates to the field of communication technology, especially, relate to a testing arrangement and test system of wireless performance.
Background
With the development of communication technology, various wireless devices are becoming indispensable tools in people's work and life. Most of the current wireless performance test methods refer to the OTA performance test method of the mobile communication device proposed in CTIA (american wireless communication and internet association) specifications. The method requires that the tested device is arranged at the center of a test system, and the performance of the three-dimensional antenna of the tested device is tested through a test antenna.
SUMMERY OF THE UTILITY MODEL
The present disclosure describes a test apparatus and a test system for wireless performance.
According to a first aspect of embodiments of the present disclosure, there is provided a test apparatus for wireless performance, including: testing the antenna; the scanning mechanism is used for controlling the test antenna to reach a plurality of preset test points; and at least one universal joint arranged on the scanning mechanism, wherein the universal joint is suitable for installing the test antenna and is used for controlling the test antenna to point to a target position or/and controlling the test antenna to rotate to reach a preset polarization direction for each test point.
According to a second aspect of embodiments of the present disclosure, there is provided a test system of wireless performance, including: testing the antenna; the scanning mechanism is used for controlling the test antenna to reach a plurality of preset test points; the universal joint is used for controlling the test antenna to point to a target position or/and controlling the test antenna to rotate to reach a preset polarization direction for each test point; and the rotary table is used for controlling the rotation of the measured piece.
According to the embodiment of the disclosure, under the condition that the phase center of the tested piece deviates from the center of the test system, the test result of the wireless performance of the tested piece can be accurately obtained by controlling the pointing direction and the polarization direction of the test antenna.
Drawings
Fig. 1 is a schematic diagram of a testing device for wireless performance shown in the present disclosure according to one embodiment.
Fig. 2 is a schematic diagram of a testing device for wireless performance shown in accordance with one embodiment of the present disclosure.
FIG. 3 is a schematic diagram of a testing device for wireless performance shown in the present disclosure according to one embodiment.
FIG. 4 is a schematic diagram of a test system for wireless performance shown in accordance with one embodiment of the present disclosure.
FIG. 5 is a schematic diagram of a test system for wireless performance shown in accordance with one embodiment of the present disclosure.
Detailed Description
Embodiments of the present disclosure are described below with reference to the drawings. It should be understood that the drawings are not necessarily to scale. The described embodiments are exemplary and not intended to limit the present disclosure, which features may be combined with or substituted for those of the embodiments in the same or similar manner. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
In the present disclosure, the test object is a wireless device, and the wireless device refers to a device capable of performing wireless communication, and may be, for example, a small device such as a computer, a mobile phone, a tablet, a wearable smart device, or a wireless router, or a large device such as a base station, a large antenna, a vehicle, or an airplane. The performance of a wireless device refers to the wireless signal transmission capability of the antenna of the wireless device, including the transmission performance or/and the reception performance. It will be appreciated that for large devices, a device may have multiple communication modules, and that each module may be tested separately for corresponding wireless performance, depending on the testing requirements.
An embodiment of one aspect of the present disclosure is a device for testing wireless performance, including: testing the antenna; the scanning mechanism is used for controlling the test antenna to reach a plurality of preset test points; and at least one universal joint arranged on the scanning mechanism, wherein the universal joint is suitable for installing the test antenna and is used for controlling the test antenna to point to a target position or/and controlling the test antenna to rotate to reach a preset polarization direction for each test point.
Optionally, the scanning mechanism is any one of:
the universal joint can move along the guide rail;
the rotating arm is suitable for driving the universal joint to rotate around a preset rotating shaft;
the universal joint is arranged at the tail end of the mechanical arm.
Optionally, the testing apparatus further comprises a moving component for controlling the movement of the scanning mechanism, as an example, the moving component may be a movable platform carrying the scanning mechanism, for moving the scanning mechanism to a desired position during testing, or/and for controlling the scanning mechanism to rotate around the tested piece during testing.
As shown in fig. 1, according to an embodiment of the testing apparatus, the testing apparatus includes an arc-shaped guide rail 100, 2 universal joints 200 are installed on the arc-shaped guide rail 100, and a testing antenna 300 is installed on the universal joints 200. The arc-shaped track 100 controls the universal joint 200 to make an arc-shaped motion along the track, so that the test antenna 300 makes a corresponding arc-shaped motion and reaches a plurality of preset test points, and the arc-shaped motion track of the test antenna 300 is the scanning track of the spherical scanning test. When the test antenna 300 reaches each test point, the universal joint 200 controls the test antenna 300 to point to a target position, or/and controls the test antenna 300 to rotate to reach a preset polarization direction. It should be noted that the testing apparatus of this embodiment has 2 testing antennas, and can perform sampling at two preset testing points at the same time, for example, the positions of the 2 testing antennas can be set to the angles that satisfy the interval between adjacent sampling points. In this embodiment, the arc-shaped guide rail is in a half arc shape, the test antenna moves on the arc-shaped guide rail once, the sampling of a plurality of test points can be performed on the half arc, and the scanning test value of the upper half spherical surface of the tested piece can be obtained by repeating the sampling for a plurality of times in combination with the rotation of the turntable bearing the tested piece at certain angle intervals or the movement of the arc-shaped guide rail. The shape of the arc-shaped guide rail is not limited to the half arc exemplified in the present embodiment, and may be, for example, a quarter arc.
The foregoing "target position" and "preset polarization direction" are explained herein.
The test antenna described in the present disclosure is directed to the target position, and may be understood as the test antenna is directed to the target position with a fixed radiation direction (usually the maximum gain direction or a direction close to the maximum gain direction). In some related arts, the maximum radiation direction of the antenna coincides with the normal direction of the antenna port. The target position refers to the phase center of the antenna of the measured piece, namely the equivalent radiation center of the antenna. It will be appreciated that there may be multiple antennas to be tested on a single device under test and therefore multiple corresponding phase centers. In The related art, The ota (over The air) test requires that a phase center is placed at The center of a test system (i.e., The center of a test area or The center of a test spindle), a three-dimensional wireless performance test is performed on a tested piece with The phase center, and during The test, a test antenna is aligned to The center in a fixed radiation direction to obtain a larger transmission energy. When the phase center of the tested piece is not arranged at the center of the test system due to the reasons of large volume, heavy weight, inconvenient movement and the like, the test antenna points to the phase center in different radiation directions at different test points, and the test antenna has different gains in different radiation directions, thereby causing test errors. Especially when the phase center is shifted farther from the center of the test system, or in the case of a narrower test antenna beam width, the test antenna may point at the phase center with side lobes or even nulls at some test points, further increasing the uncertainty of the test. It should be noted that, in the related art, the geometric center of the antenna is usually determined as its phase center, that is, as the aforementioned target position. However, for some antennas, the actual phase center is significantly different from the geometric center position, in which case the apparent phase center can be determined as the target position. The apparent phase center is a reference point where the main lobe of the antenna remains relatively constant over a range of phases of its radiated field. The testing device can solve the problems, when the target position of the tested piece is not arranged in the center of the testing system, the universal joint controls the testing antenna to point to the target position, the radiation energy of the tested piece is accurately obtained, and the testing result can accurately reflect the antenna performance of the tested piece.
In the related art, the test specification of the OTA requires that the polarization directions of the test points are consistent in a single test, so as to ensure the test accuracy. The testing device disclosed by the invention adjusts the polarization direction of the testing antenna through the universal joint so as to ensure that the polarization directions of the testing antenna at all testing points are consistent.
As shown in fig. 2, according to an embodiment of the testing apparatus, the testing apparatus includes a rotating arm 100, 1 gimbal 200 is mounted on the rotating arm 100, and a testing antenna 300 is mounted on the gimbal 200. The rotating arm 100 is adapted to drive the universal joint 200 to rotate around the preset rotating axis L through the rotating joint 101, so that the test antenna 300 makes corresponding arc-shaped motion and reaches a plurality of preset test points, and a track of the arc-shaped motion of the test antenna 300 is a scanning track of the spherical scanning test. When the test antenna 300 reaches each test point, the universal joint 200 controls the test antenna 300 to point to a target position, or/and controls the test antenna 300 to rotate to reach a preset polarization direction.
As shown in fig. 3, according to an embodiment of the test apparatus, the test apparatus includes a robot arm 100, 1 gimbal 200 is mounted at a distal end of the robot arm 100, and a test antenna 300 is mounted on the gimbal 200. The mechanical arm 100 drives the universal joint 200 to move, so that the test antenna 300 reaches a plurality of preset test points according to a preset scanning track. When the test antenna 300 reaches each test point, the universal joint 200 controls the test antenna 300 to point to a target position, or/and controls the test antenna 300 to rotate to reach a preset polarization direction.
Compared with a guide rail and a rotating arm, the mechanical arm can provide a more flexible scanning mode. However, the robot arm also has application limitations. In the related art, the working space is the range that the end of the mechanical arm can reach, and the working space comprises two types: the reachable workspace, i.e. the spatial area that the end of the robot arm can reach from at least one direction; a smart workspace, i.e., a region of space that the end of the robotic arm can reach from any direction. The robotic arm may control the test antenna to reach multiple test points within its working space, but for a robotic arm with less degrees of freedom, its dexterous working space has a smaller range, and at some test points it may not be possible to adjust the pointing angle and polarization direction of the test antenna. The tail end of the mechanical arm is additionally provided with the universal joint, so that the range of the smart working space of the mechanical arm can be expanded. For the mechanical arm with more degrees of freedom, the range of the smart working space is relatively large, but for a complex scanning track or a large measured piece, application limitation still exists possibly due to reasons such as joint limiting and the like, and the redundant degree of freedom of the mechanical arm can be increased by additionally arranging the universal joint.
An embodiment of one aspect of the disclosure is a wireless performance testing system, which includes the foregoing testing device, and a turntable for controlling rotation of a tested piece.
Optionally, according to an embodiment of the test system, further comprising an anechoic chamber. The anechoic chamber provides a test environment for testing, and specifically can be a full-wave anechoic chamber, an EMC anechoic chamber, a field provided with a wave-absorbing screen and the like.
Optionally, according to an embodiment of the test system, further comprising a test meter. The test meter is used to generate test signals to the test antenna or/and to receive signals from the wireless device to obtain test data.
As shown in FIG. 4, according to one embodiment of a test system, the test system includes: the test antenna 300, the arc-shaped guide rail 100, the universal joint 200, the turntable 400, the anechoic chamber 500, and a test instrument (not shown) connected with the test antenna 300.
In the following, an example of a test system according to the present disclosure is described as a test method performed by a test apparatus/test system according to the present disclosure. Referring to fig. 4 and 5, a test coordinate system is established with the center of the test system as the origin of coordinates, a plane parallel to the plane of the turntable 400 as an XY plane, and an axis perpendicular to the XY plane and facing upward from the ground as a Z-axis forward direction. The arc-shaped rail 100 is fixedly disposed. The center of rotation of the turret 400 is at the origin of the test system. The tested piece 600 is a vehicle, the tested piece 600 has 4 antennas to be tested, the phase centers of the antennas to be tested, namely the target positions are A, B, C and D respectively, and the positions of the target positions in the test coordinate system are known. The target position A is located at the origin of the test coordinate system, and the other three target positions deviate from the origin of the test coordinate system.
The test method comprises the following steps:
step S11, controlling the test antenna to reach a plurality of preset test points;
step S12, for each test point, controlling the test antenna to point to the target position and reach the preset polarization direction;
and step S13, obtaining the test values of all the test points, and obtaining the test result according to the test values.
Optionally, according to an embodiment of the testing method, the preset testing point is located on a virtual sphere.
Optionally, according to an embodiment of the testing method, the target position is a phase center of the tested piece.
Optionally, according to an embodiment of the testing method, the testing method is a spherical scan test, and includes the following steps:
step S21, controlling the test antenna to reach a plurality of preset test points in a fixed arc-shaped motion track;
step S22, for each test point, controlling the test antenna to point to a target position and reach a preset polarization direction, and obtaining a test value of the test point;
and step S23, the tested piece rotates a preset angle to obtain an updated target position, the steps are repeated until test values of all the test points are obtained, and a test result is obtained according to the test values.
Specifically, the test procedure for the target position a is:
step S201, the arc guide rail 100 controls the test antenna 300 to make a fixed one-half circular arc motion along the track, the circular arc takes the origin of the test coordinate system as the center of a circle, and the circular arc motion track comprises a plurality of test points 301 with preset sampling interval angles (for example, 15 degrees);
step S202, controlling the test antenna 300 to point to a target position A and reach a preset polarization direction through the universal joint 200 at each test point 301, and obtaining a test value of each test point 301; it should be noted that, because the target position a is located at the origin of the test system, when the pointing direction and the polarization direction of the test antenna 300 are adjusted at any test point 301, no adjustment is needed at other test points 301;
step S203, the turntable 400 rotates a preset angle on the XY plane of the test coordinate system, step S201 and step S202 are repeated to obtain the test value of each test point 301 of the turntable 400 at the rotation angle, the turntable rotates a preset angle again, step S201 and step S202 are repeated until the test values of all the test points of the turntable 400 at all the rotation angles are obtained, and the test result is obtained according to the test values. It should be noted that, in this embodiment, the target position a is located at the origin of the test system, so that after the turntable 400 rotates, the coordinates of the target position a in the test coordinate system are not changed. In this embodiment, the preset test point is located on a virtual hemispherical surface, that is, the scan test of the upper hemispherical surface is performed on the tested piece, so as to obtain the wireless performance in the corresponding direction. In the present disclosure, optionally, the test may be performed in the near-field range of the tested piece, and the far-field performance of the antenna is calculated by performing near-field-far-field transformation on the test value as the test result.
The test procedure for target position B was:
step S211, the arc guide rail 100 controls the test antenna 300 to make a fixed one-half circular arc motion along the track, where the circular arc uses the origin of the test coordinate system as the center of circle, and the circular arc motion track includes a plurality of test points 301 with preset sampling interval angles (e.g., 15 °);
step S212, controlling the test antenna 300 to point to a target position B and reach a preset polarization direction through the universal joint 200 at each test point 301, and obtaining a test value of each test point 301;
step S213, the rotating platform 400 rotates a preset angle on the XY plane of the test coordinate system to obtain an updated target position B, step S211 and step S212 are repeated to obtain a test value of the rotating platform 400 at each test point 301 of the rotation angle, the rotating platform rotates a preset angle again to obtain an updated target position B, step S211 and step S212 are repeated until test values of all test points of the rotating platform 400 at all rotation angles are obtained, and a test result is obtained according to the test values. It should be noted that, in this embodiment, since the target position B deviates from the origin of the test coordinate system and the arc-shaped guide rail 100 is fixedly disposed, after the turntable 400 rotates, the coordinate of the target position B in the test coordinate system changes, and before repeating step S211 and step S212, the coordinate value of the target position B needs to be updated.
The testing steps for target locations C and D are similar and will not be described further herein.
It should be noted that, for the test in which the phase center is deviated from the center of the test system, for example, the test of the target positions B, C, and D, the distances between each test point and the target position may be different, and in the step of obtaining the test result according to the test value, as an example, for each test value, the test result is obtained after performing compensation calculation of the gain and the path loss of the test antenna according to the polarization direction of the test antenna and the distance between the test antenna and the target position.
In the description above, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In the present disclosure, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise.
Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure, and that changes, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present disclosure.
Claims (8)
1. A wireless performance testing apparatus, comprising:
testing the antenna;
the scanning mechanism is used for controlling the test antenna to reach a plurality of preset test points; and
and the universal joint is used for controlling the test antenna to point to a target position or/and controlling the test antenna to rotate to reach a preset polarization direction for each test point.
2. The testing device of claim 1, wherein the scanning mechanism is any one of:
a guide rail along which the universal joint is movable;
the rotating arm is suitable for driving the universal joint to rotate around a preset rotating shaft;
and the universal joint is arranged at the tail end of the mechanical arm.
3. A test device according to claim 1 or 2, further comprising a movement assembly for controlling movement of the scanning mechanism.
4. A system for testing wireless performance, comprising:
testing the antenna;
the scanning mechanism is used for controlling the test antenna to reach a plurality of preset test points;
at least one universal joint arranged on the scanning mechanism, wherein the universal joint is suitable for installing the test antenna and is used for controlling the test antenna to point to a target position or/and controlling the test antenna to rotate to reach a preset polarization direction for each test point; and
and the rotary table is used for controlling the rotation of the measured piece.
5. The test system of claim 4, further comprising an anechoic chamber.
6. The test system of claim 4, further comprising a test meter.
7. The test system of any one of claims 4-6, wherein the scanning mechanism is any one of:
a guide rail along which the universal joint is movable;
the rotating arm is suitable for driving the universal joint to rotate around a preset rotating shaft;
and the universal joint is arranged at the tail end of the mechanical arm.
8. The test system of any of claims 4-6, further comprising a movement assembly for controlling movement of the scanning mechanism.
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| CN202022057849.6U CN212367282U (en) | 2020-09-18 | 2020-09-18 | Wireless performance testing device and testing system |
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| CN202022057849.6U CN212367282U (en) | 2020-09-18 | 2020-09-18 | Wireless performance testing device and testing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111988094A (en) * | 2020-09-18 | 2020-11-24 | 漆一宏 | Wireless performance testing device, system, method, equipment and storage medium |
| CN114221715A (en) * | 2021-12-09 | 2022-03-22 | 深圳市通用测试系统有限公司 | Test system and test method |
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2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111988094A (en) * | 2020-09-18 | 2020-11-24 | 漆一宏 | Wireless performance testing device, system, method, equipment and storage medium |
| CN111988094B (en) * | 2020-09-18 | 2023-03-31 | 深圳市通用测试系统有限公司 | Wireless performance testing device, system, method, equipment and storage medium |
| CN114221715A (en) * | 2021-12-09 | 2022-03-22 | 深圳市通用测试系统有限公司 | Test system and test method |
| CN114221715B (en) * | 2021-12-09 | 2023-09-12 | 深圳市通用测试系统有限公司 | Test system and test method |
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Effective date of registration: 20210219 Address after: No.564, Zhoushi Road, Jiuwei community, Hangcheng street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: GENERAL TEST SYSTEMS Inc. Address before: Waterloo, Ontario, Canada Patentee before: Lacquer Yihong |