Automatic calibration ball conveying device

Abstract

The invention belongs to the field of microwave darkroom RCS testing, and particularly relates to an automatic calibration ball conveying device. The device comprises a winch, the winch is movably installed on a truss at the top of a darkroom, a sling is installed on the winch, and the winch drives the sling to be put down or put away; the mechanical claw is connected with the sling, and the mechanical claw is driven by a mechanical claw motor to grab or release the calibration ball; the sensor is mounted on the mechanical claw; the foam column is installed on the ground of the darkroom, and the top of the foam column is provided with a circular truncated cone used for supporting the calibration ball; and the controller is used for controlling the winch and the mechanical claw motor according to a signal fed back by the sensor. According to the invention, the test efficiency is improved, the manpower is saved, the change of the darkroom background environment caused by the placing process of the calibration ball is avoided, and the stability of the darkroom background environment is improved.

Description

Technical Field

[0001] This application belongs to the field of RCS testing in anechoic chambers, and particularly relates to an automatic calibration sphere transfer device. Background Art

[0002] When conducting RCS testing in an anechoic chamber, in order to obtain the RCS value of the target under test, a calibration body with a known accurate RCS is required for relative calibration. When using a foam bracket to support the target under test, calibration spheres and calibration plates are usually used as calibration bodies. Among them, the calibration sphere is the most widely used. Its advantages include a rotationally symmetric shape, an easily obtainable RCS theoretical value, and easy placement, which is more convenient and practical compared to the flat plate.

[0003] With the increasing requirement for measurement efficiency, the placement process of the calibration sphere can be used as a starting point. Currently, there are few automatic calibration sphere placement devices in China. Almost all calibration spheres in test anechoic chambers are placed manually. This method not only wastes manpower, but also has certain errors and uncertainties in manual operation, which may affect the accuracy of measurement results and cause unnecessary interference and influence on the background environment of the anechoic chamber.

[0004] Therefore, it is desirable to have a technical solution to overcome or at least mitigate at least one of the above-mentioned defects of the prior art. Summary of the Invention

[0005] The purpose of this application is to provide an automatic calibration sphere transfer device to solve at least one problem existing in the prior art.

[0006] The technical solution of this application is as follows:

[0007] An automatic calibration sphere transfer device includes:

[0008] A winch, which is movably installed on the top truss of the anechoic chamber. A sling is installed on the winch, and the winch is used to drive the sling to lower or retract.

[0009] A mechanical claw, which is connected to the sling. The mechanical claw is used to grab or release the calibration sphere by driving the mechanical claw motor.

[0010] A sensor, which is installed on the mechanical claw.

[0011] A foam column, which is installed on the ground of the anechoic chamber. A frustum for supporting the calibration sphere is provided at the top of the foam column.

[0012] A controller, which is used to control the winch and the mechanical claw motor according to the signal feedback by the sensor.

[0013] In at least one embodiment of the present application, the sensor includes:

[0014] A first sensor for identifying the frustum at the top of the foam column;

[0015] A second sensor for measuring the distance between the calibration ball and the frustum at the top of the foam column.

[0016] In at least one embodiment of the present application,

[0017] The controller is configured to control the winch to move above the frustum at the top of the foam column according to the signal fed back by the first sensor, and control the winch to drive the sling to lower or retract;

[0018] The controller is further configured to control the robotic gripper motor to drive the robotic gripper to grab or release the calibration ball according to the signal fed back by the second sensor.

[0019] In at least one embodiment of the present application, the power supply cables and signal cables of the winch, the robotic gripper motor, the sensor, and the controller are integrated in the sling.

[0020] In at least one embodiment of the present application, the diameter size range of the calibration ball is 100 mm to 400 mm.

[0021] In at least one embodiment of the present application, a foam pad is installed at the bottom of the calibration ball.

[0022] In at least one embodiment of the present application, the foam pad is bonded to the bottom of the calibration ball.

[0023] In at least one embodiment of the present application, the foam pad is made of a wave-transparent foam material.

[0024] The invention has at least the following beneficial technical effects:

[0025] The calibration ball automatic transmission device of the present application improves the test efficiency, saves manpower, and at the same time avoids the change of the darkroom background environment caused by the placement process of the calibration ball, improving the stability of the darkroom background environment. Description of the Drawings

[0026] Figure 1 It is a schematic diagram when the calibration ball automatic transmission device of an embodiment of the present application places the calibration ball on the foam column;

[0027] Figure 2 It is a schematic diagram when the calibration ball automatic transmission device of an embodiment of the present application carries the calibration ball;

[0028] Figure 3This is a schematic diagram of the calibration ball automatic transmission device of an embodiment of the present application when it does not carry a calibration ball.

[0029] Among them:

[0030] 1 - winch; 2 - sling; 3 - mechanical claw motor; 4 - sensor; 5 - mechanical claw; 6 - calibration ball; 7 - foam pad; 8 - foam column. Specific embodiments

[0031] To make the purpose, technical solutions and advantages of the implementation of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application. The embodiments of the present application will be described in detail below with reference to the drawings.

[0032] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present application.

[0033] The following combines the attached Figures 1 to 3 A further detailed description of the present application will be made.

[0034] The present application provides a calibration ball automatic transmission device, including a winch 1, a sling 2, a mechanical claw motor 3, a sensor 4, a mechanical claw 5, a calibration ball 6, a foam pad 7 and a foam column 8.

[0035] Specifically, the winch 1 is movably installed on the truss at the top of the anechoic chamber. A sling 2 is installed on the winch 1, and the winch 1 is used to drive the sling 2 to be lowered or retracted. In order not to affect the RCS test of the anechoic chamber, when this device is not in use, a special storage position is set on one side of the top of the anechoic chamber. The winch 1 is used to carry the entire device and has functions of translational adjustment, left - right adjustment, and lifting the sling. The controller controls the winch 1 to move along the truss at the top of the anechoic chamber according to the sensor signals, realizing the transfer from the working position to the storage position, and can lower or retract the sling 2, thereby realizing the lifting of the load (calibration sphere 6); the winch 1 finely adjusts the left - right position to make the load located on the axis of the foam column 8. The sling 2 has a certain load - bearing capacity, can carry the load below, execute the lifting of the load, and can be retracted into the winch 1.

[0036] The mechanical claw 5 is connected to the sling 2, and the mechanical claw motor 3 drives the mechanical claw 5 to grab or release the calibration sphere 6. The mechanical claw motor 3 mainly drives the mechanical claw 5 to move, and is controlled by the controller according to the sensor signals to drive the mechanical claw 5 to execute the action of grabbing or releasing the calibration sphere 6. The calibration sphere 6 is the object grabbed or released by the mechanical claw 5 and is the calibration sphere for the RCS test of the anechoic chamber. The purpose of the whole device is to realize the automatic transfer of the calibration sphere 5, that is, automatic grabbing and automatic placement.

[0037] The sensor 4 is installed on the mechanical claw 5, collects various signals, so as to be able to control the calibration sphere 6 to be accurately placed at the center position of the round table at the top of the foam column 8. The foam column 8 is used to support the calibration sphere 6 or other measured targets. The foam column 8 is installed on the ground of the anechoic chamber, located at the center position in the left - right direction of the anechoic chamber, and a round table for supporting the calibration sphere 6 is provided at the top of the foam column 8. The controller is used to control the winch 1 and the mechanical claw motor 3 according to the signals fed back by the sensor 4.

[0038] In the preferred embodiment of the present application, the sensor 4 includes a first sensor and a second sensor. The first sensor is used to identify the round table at the top of the foam column 8, and the second sensor is used to measure the distance between the calibration sphere 6 and the round table at the top of the foam column 8. The controller is used to control the winch 1 to move above the round table at the top of the foam column 8 according to the signal fed back by the first sensor, and control the winch 1 to drive the sling 2 to be lowered or retracted; the controller is also used to control the mechanical claw motor 3 to drive the mechanical claw 5 to grab or release the calibration sphere 6 according to the signal fed back by the second sensor. By using the first sensor to identify the round table at the top of the foam column 8, the controller transmits the sensor signal to the winch 1 to translate it near the top of the round table of the foam column 8 and make fine left - right adjustments, so that the calibration sphere 6 is located above the central axis of the foam column 8; the second sensor is provided to measure the distance between the calibration sphere 6 and the round table at the top of the foam column 8, and the controller transmits the sensor signal to the mechanical claw motor 3 to drive the mechanical claw 5 to grab or release the calibration sphere 6.

[0039] In this embodiment, in addition to having a certain load-bearing capacity, the sling 2 also has the functions of power supply and signal transmission. By integrating the power supply cables and signal cables of the winch 1, the mechanical claw motor 3, the sensor 4, and the controller in the sling 2, the power supply and signal transmission functions between the winch 1, the mechanical claw motor 3, the sensor 4, and the controller are realized.

[0040] In the preferred embodiment of the present application, the size of the calibration sphere 6 is not theoretically limited. Generally, the diameter size range of the calibration sphere 6 used in the anechoic chamber RCS test is 100 mm to 400 mm, and this device can fully cover it. In this embodiment, a foam pad 7 is installed at the bottom of the calibration sphere 6. The foam pad 7 is bonded to the bottom of the calibration sphere 6 and fixed to the calibration sphere 6 as a whole. When the calibration sphere 6 is placed on the top frustum of the foam column 8 for testing, it plays a role in stabilizing the calibration sphere 6. Preferably, the material of the foam pad 7 is a wave-transparent foam material, which will not affect the test of the calibration sphere 6.

[0041] For the automatic calibration sphere transfer device of the present application, the descriptions of each component and its function are shown in Table 1.

[0042] Table 1

[0043]

[0044] The automatic calibration sphere transfer device of the present application has the characteristics of improving the test efficiency, saving manpower, and improving the stability of the anechoic chamber background environment.

[0045] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claimed rights.

Claims

1. An automatic calibration sphere transfer device, characterized in that, Comprising: A winch (1), the winch (1) is movably installed on the top truss of the darkroom, a sling (2) is installed on the winch (1), and the sling (2) is driven by the winch (1) to be lowered or retracted. A mechanical claw (5), the mechanical claw (5) is connected to the sling (2), and the mechanical claw (5) is driven by a mechanical claw motor (3) to grab or release a calibration ball (6). A sensor (4), the sensor (4) is installed on the mechanical claw (5). A foam column (8), the foam column (8) is installed on the ground of the darkroom, and a frustum for supporting the calibration ball (6) is provided at the top of the foam column (8). A controller, the controller is used to control the winch (1) and the mechanical claw motor (3) according to the signal fed back by the sensor (4).

2. The automatic calibration ball transfer device according to claim 1, wherein The sensor (4) includes: A first sensor for identifying the frustum at the top of the foam column (8). A second sensor for measuring the distance between the calibration ball (6) and the frustum at the top of the foam column (8).

3. The calibration ball automatic transmission device according to claim 2, wherein The controller is used to control the winch (1) to move above the frustum at the top of the foam column (8) according to the signal fed back by the first sensor, and control the winch (1) to drive the sling (2) to be lowered or retracted. The controller is further used to control the mechanical claw motor (3) to drive the mechanical claw (5) to grab or release the calibration ball (6) according to the signal fed back by the second sensor.

4. The automatic calibration ball transfer device according to claim 3, characterized in that, The power supply cables and signal cables of the winch (1), the mechanical claw motor (3), the sensor (4) and the controller are integrated in the sling (2).

5. The automatic calibration ball transfer device according to claim 1, characterized in that, The diameter size range of the calibration ball (6) is 100mm to 400mm.

6. The automatic calibration ball transfer device according to claim 5, characterized in that, A foam pad (7) is installed at the bottom of the calibration ball (6).

7. The automatic calibration ball transfer device according to claim 6, characterized in that, The foam pad (7) is adhesively bonded to the bottom of the calibration ball (6).

8. The automatic calibration ball transfer device according to claim 7, characterized in that, The foam pad (7) is made of a wave-transparent foam material.

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