Support for OTA test

Abstract

The utility model discloses a support for OTA testing. The support comprises a base; the first rotating part is connected with the base, and the first rotating part comprises a first shaft capable of rotating around a first axial direction and a first driving piece connected with the first shaft; the second rotating part is connected with the first shaft, the second rotating part can rotate around a first axial direction along with the first shaft, the second rotating part comprises a second shaft and a second driving part, the second shaft can rotate around a second axial direction, the second driving part is connected with the second shaft, and the first axial direction is perpendicular to the second axial direction; the clamping part is connected with the second shaft, and the clamping part can rotate around the second axial direction along with the second shaft; and the first driving piece and the second driving piece are both connected with the upper computer, and the upper computer is used for controlling the rotation angles of the first shaft and the second shaft. The support can clamp an object to be tested to rotate freely in the space, and the OTA test requirement is met in a real sense.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic testing, in particular to a bracket for OTA testing. Background Art

[0002] Currently, more and more attention is paid to the test of the radiation performance of the whole device in the RF performance test of mobile phones. This radiation performance reflects the final transmission and reception performance of the mobile phone. At present, the European cellular mobile mandatory regulatory standards ETSI EN301908-2 / -13 / -25 have begun to force OTA testing of mobile phone products.

[0003] OTA testing is air interface testing. Information transmission between different devices needs to be realized through interfaces, and the transmission through electromagnetic waves in the air is called air interface. OTA testing is to evaluate the air interface performance of the device under test (DUT). During OTA testing, the signal is sent or received from the air interface, rather than through a test connected by a conductive line. It is a direct test of the wireless signal radiation performance of the device under test.

[0004] The existing brackets in traditional darkrooms, where the object to be tested is placed on a rotating table, can only achieve rotation in a single plane direction and cannot meet the test requirements of arbitrary rotation in space. That is, the existing traditional darkroom test brackets cannot truly meet the spatial rotation requirements of OTA testing. Utility Model Content

[0005] In order to overcome the defects in the prior art, the utility model provides an OTA test bracket, which can clamp the object to be tested and rotate it arbitrarily in space, truly meeting the OTA test requirements.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an OTA test bracket, comprising:

[0007] Base;

[0008] a first rotating part, the first rotating part is connected to the base, the first rotating part comprises a first shaft capable of rotating around a first axial direction, and a first driving member connected to the first shaft;

[0009] a second rotating part, the second rotating part is connected to the first shaft, the second rotating part can rotate around the first axial direction following the first shaft, the second rotating part comprises a second shaft that can rotate around a second axial direction, and a second driving member connected to the second shaft, wherein the first axial direction and the second axial direction are perpendicular to each other;

[0010] A clamping portion, wherein the clamping portion is connected to the second shaft, the clamping portion can rotate along with the second shaft around the second axial direction, the clamping portion comprises a clamping seat fixedly connected to the second shaft, and a pressing portion arranged opposite to the clamping seat, the pressing portion having a telescopic structure;

[0011] A host computer, wherein the first driving member and the second driving member are both connected to the host computer, and the host computer is used to control the rotation angles of the first shaft and the second shaft.

[0012] Through the above technical solution, during OTA testing, it is only necessary to place the object to be tested on the clamping part, and the host computer controls the first driving member and the second driving member to drive the first axis and the second axis to rotate around the first axial direction and the second axial direction respectively, so that the object to be tested can be rotated at any angle in space, meeting the spatial rotation requirements of OTA testing.

[0013] Furthermore, the second rotating part and the first shaft are connected via a transmission member, the transmission member includes a first plate fixedly connected to the first shaft, and a second plate and a third plate fixedly connected to the first plate, the second rotating part is connected between the second plate and the third plate. The first shaft transmits the action of rotating around the first axial direction to the second rotating part via the transmission member.

[0014] Furthermore, the first plate is perpendicular to the first axial direction, the second plate is perpendicular to the first plate, and the second plate and the third plate are symmetrically arranged about the first axis, thereby ensuring that the position of the geometric center of the object to be measured remains unchanged during rotation.

[0015] Furthermore, the second driving member includes a second motor, the second motor is fixedly connected to a second plate, and the second shaft is connected to a driving end of the second motor.

[0016] Furthermore, the clamping part includes a clamping seat fixedly connected to the second axis, and a pressing part connected to the third plate, the pressing part and the clamping seat are arranged opposite to each other, and the pressing part has a telescopic structure. When the object to be tested is placed on the clamping seat, the pressing part extends toward the clamping seat to clamp the object to be tested.

[0017] Furthermore, the pressing part includes a telescopic rod connected to the third plate, and a pressing plate rotatably connected to the telescopic rod.

[0018] Furthermore, the pressing part includes a telescopic rod rotatably connected to the third plate, and a pressing plate connected to the telescopic rod.

[0019] Furthermore, a groove is provided on a side of the clamping seat facing the pressing plate, and an elastic member is provided between the groove and the pressing plate.

[0020] Furthermore, a groove is provided on one side of the clamping seat facing the pressing plate, and the clamping seat and the pressing plate are both made of elastic material. The groove is used to place the object to be tested, limit the displacement of the object to be tested to the surroundings, and prevent the object to be tested from slipping. An elastic member is provided between the groove and the pressing plate, or the clamping seat and the pressing plate are made of elastic material, both of which play a buffering and protective role on the object to be tested.

[0021] Furthermore, the first driving member includes a first motor, the first motor is fixedly connected to the base, and the first shaft is connected to the driving end of the first motor. The first motor and the second motor can be controlled by the upper computer to drive the rotation angle of the first shaft and the second shaft, thereby controlling the angle of the object to be measured.

[0022] Furthermore, universal wheels are installed on the lower side of the base, and the installation of the universal wheels facilitates the movement of the bracket.

[0023] By means of the above technical solution, the beneficial effects of the utility model are as follows:

[0024] 1. In the present application, a second axis that can rotate around a second axis is connected to a first axis that can rotate around a first axis through a transmission member, wherein the first axis is perpendicular to the second axis, and a clamping part is connected to the second axis to fix the object to be tested on the clamping part, so that the object to be tested can be rotated arbitrarily in space, which truly meets the spatial rotation requirements of OTA testing;

[0025] 2. The present application sets an elastic member between the clamping seat and the pressure plate, and places the object to be tested between the two elastic members, which plays a good buffering and protective role.

[0026] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a schematic diagram of the overall structure of the OTA test bracket in the embodiment of the utility model;

[0029] Figure 2 It is a cross-sectional view of the second rotating part in the embodiment of the utility model.

[0030] The figure markings of the above drawings are: 1, base; 11, pedestal; 12, vertical pole; 21, first motor; 22, first axis; 31, first plate; 32, second plate; 33, third plate; 41, second motor; 42, second axis; 51, clamping seat; 511, groove; 52, telescopic rod; 521, cylinder; 522, driving rod; 53, pressure plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0033] Example: Combination Figure 1-2 As shown, this embodiment discloses an OTA test bracket, including:

[0034] The base 1 comprises a base 11 and a vertical rod 12 connected to the base 11, wherein the vertical rod 12 is perpendicular to the base 11. Universal wheels are installed on the lower side of the base 11 to facilitate the movement of the bracket.

[0035] The base 1 is connected to a first rotating part, which includes a first motor 21 connected to the vertical pole 12 and a first shaft 22 connected to the driving end of the first motor 21, wherein the first shaft 22 is perpendicular to the vertical pole. The first motor 21 can drive the first shaft to rotate around a first axial direction. Figure 1 Described first axis is horizontal direction.

[0036] The first rotating part is connected to the second rotating part, and the second rotating part is connected to the first shaft 22 of the first rotating part through a transmission member. The transmission member includes a first plate 31 fixedly connected to the first shaft 21, and a second plate 32 and a third plate 33 fixedly connected to the first plate 31. Among them, the first plate 31 is perpendicular to the first shaft 22, and the second plate 32 and the third plate 33 are both perpendicular to the first plate 31. It should be noted that the second plate 32 and the third plate 33 are symmetrically arranged about the first shaft 22 to ensure that the position of the geometric center of the object to be measured remains unchanged during rotation.

[0037] The second rotating part is connected to the rotating member, and the second rotating part includes a second motor 41 fixedly connected to the second plate 32, and a second shaft 42 connected to the driving end of the second motor 41. The second shaft 42 is perpendicular to the second plate 32. The second motor 41 can drive the second shaft 42 to rotate around the second axial direction. Figure 1 As shown, the second axis is the vertical direction.

[0038] The first motor 21 and the second motor 41 are connected to a host computer through a wire harness. The host computer is arranged outside the anechoic chamber, and the first motor 21 and the second motor 41 can be remotely controlled by the host computer to drive the first shaft 22 and the second shaft 42 to rotate by a preset angle.

[0039] The second rotating part is connected with a clamping part for clamping the object to be tested, and the clamping part includes a clamping seat 51 fixedly connected to the second shaft 42, and a pressing part screwed to the third plate 33. The pressing part and the clamping seat 51 are arranged opposite to each other, and the pressing part has a telescopic structure. A groove 511 is provided on one side of the clamping seat 51 facing the pressing part, and the groove 511 is used to place the object to be tested. It should be noted that the pressing part can rotate with the rotation of the clamping seat 51.

[0040] The pressing part includes a telescopic rod 52 fixedly connected to the third plate 33, and a pressing plate 53 rotatably connected to the telescopic rod 52. Figure 2 As shown, in the present application, the pressing plate 53 is connected to the telescopic rod 52 via a spherical connector, so that the pressing plate 53 can rotate relative to the telescopic rod 52 , thereby making the pressing plate 53 a follower of the clamping seat 51 .

[0041] Optionally, the pressing plate 53 may also be connected to the telescopic rod 52 by means of a bearing or other rotational connection.

[0042] Optionally, the pressing plate 53 can be fixedly connected to the telescopic rod 52, and the telescopic rod 52 and the third plate 33 are rotatably connected, so that the pressing plate 53 can also become a follower of the clamping seat 51.

[0043] The telescopic rod 52 includes a cylinder 521 and a driving rod 522 connected to the driving end of the cylinder 521, and the pressing plate 53 is connected to one end of the driving rod 522 away from the cylinder 521. The pressing plate 53 is driven by the cylinder 521 to approach or move away from the clamping seat 51, thereby clamping or releasing the object to be tested. The cylinder 521 can be controlled by the host computer.

[0044] An elastic member is disposed in the groove 511 of the clamping seat 51 and on a side of the pressing plate 53 facing the clamping seat 51 , and the elastic member can provide buffer protection for the object to be tested, so as to prevent the object to be tested from being damaged when the pressing plate 53 moves toward the object to be tested.

[0045] Optionally, the clamping seat 51 and the pressing plate 53 are both made of elastic material.

[0046] In OTA testing, the object to be tested needs to be rotated to test the signal strength at different angles. However, most of the OTA test brackets in the prior art are a rotating table, which can only rotate the object to be tested in one plane, while OTA testing requires the object to be tested to rotate arbitrarily in space with its own geometric center rotation point. That is, the prior art cannot meet the requirements of OTA testing. The OTA test bracket disclosed in this application can solve the above problems. The method of using the OTA test bracket disclosed in this application is as follows:

[0047] Before the test, the upper computer controls the clamping seat 51 to rotate to a horizontal position, the object to be tested is placed on the clamping seat 51, and the staff exits the anechoic chamber;

[0048] The upper computer controls the cylinder 521 to drive the pressing plate 53 to extend until the object to be tested is clamped between the pressing plate 53 and the clamping seat 51;

[0049] The OTA test process begins. When the object under test needs to be rotated during the test, the host computer controls the first motor 21 and the second motor 41 to drive the first axis 22 and the second axis 42 to rotate. Because the first axis 22 and the second axis 42 are perpendicular to each other, the cooperation of the first rotating part and the second rotating part can realize the object under test to rotate arbitrarily at any angle in space with its own geometric center point.

[0050] The bracket disclosed in the utility model can also be based on a non-OTA site and use the minimum cost, that is, the way of installing the bracket to transform the non-OTA site into a site where OTA can be tested.

[0051] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A bracket for OTA testing, characterized in that: include: Base; a first rotating part, the first rotating part is connected to the base, the first rotating part comprises a first shaft capable of rotating around a first axial direction, and a first driving member connected to the first shaft; a second rotating part, the second rotating part is connected to the first shaft, the second rotating part can rotate around the first axial direction following the first shaft, the second rotating part comprises a second shaft that can rotate around a second axial direction, and a second driving member connected to the second shaft, wherein the first axial direction and the second axial direction are perpendicular to each other; A clamping portion, the clamping portion comprising a clamping seat fixedly connected to the second shaft, and a pressing portion arranged opposite to the clamping seat, the pressing portion having a telescopic structure, and the clamping portion can rotate around the second axial direction along with the second shaft; A host computer, wherein the first driving member and the second driving member are both connected to the host computer, and the host computer is used to control the rotation angles of the first shaft and the second shaft.

2. The OTA test bracket according to claim 1, characterized in that: The second rotating part and the first shaft are connected via a transmission member, which includes a first plate fixedly connected to the first shaft, and a second plate and a third plate fixedly connected to the first plate, and the second rotating part is connected between the second plate and the third plate.

3. The OTA test bracket according to claim 2, characterized in that: The first plate is perpendicular to the first axial direction, the second plate is perpendicular to the first plate, and the second plate and the third plate are symmetrically arranged about the first axis.

4. The OTA test bracket according to claim 2 or 3, characterized in that: The second driving member includes a second motor, the second motor is fixedly connected to a second plate, and the second shaft is connected to a driving end of the second motor.

5. The OTA test bracket according to claim 4, characterized in that: The pressing portion is connected to the third plate.

6. The OTA test bracket according to claim 5, characterized in that: The pressing part includes a telescopic rod connected to the third plate, and a pressing plate rotatably connected to the telescopic rod.

7. The OTA test bracket according to claim 5, characterized in that: The pressing part includes a telescopic rod rotatably connected to the third plate, and a pressing plate connected to the telescopic rod.

8. The OTA test bracket according to claim 6 or 7, characterized in that: A groove is provided on one side of the clamping seat facing the pressing plate, and an elastic member is provided between the groove and the pressing plate.

9. The OTA testing bracket according to claim 6 or 7, characterized in that: A groove is provided on one side of the clamping seat facing the pressing plate, and both the clamping seat and the pressing plate are made of elastic material.

10. The OTA test bracket according to claim 1, characterized in that: The first driving member includes a first motor, the first motor is fixedly connected to the base, and the first shaft is connected to the driving end of the first motor.

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