Radiation sensitivity test system

Abstract

The invention provides a radiation sensitivity test system. The radiation sensitivity test system comprises a movable lifting platform and an automatic antenna frame arranged above the movable lifting platform, the automatic antenna frame comprises a mounting base fixed on the movable lifting platform and an antenna mounting frame hinged to the mounting base, a pitching mechanism connected with the antenna mounting frame is arranged on the mounting base, and a radiating antenna, an antenna polarization device and a distance measuring device are arranged on the antenna mounting frame; during testing, the movable lifting platform is moved to be close to a tested system, and the movable lifting platform is controlled to ascend and descend so as to adjust the radiating antenna to a testing position; driving the antenna mounting frame to move relative to the mounting base through a pitching mechanism so as to adjust the radiating antenna to a test azimuth angle and a test pitch angle; the distance measuring device is used for measuring the distance between the radiating antenna and the test surface; the antenna polarization device is used for performing polarization control on the radiation antenna; the system can be compatible with external field and darkroom working environments, and free adjustment of distance, angle and polarization mode is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of radiation sensitivity testing, and in particular relates to a radiation sensitivity testing system. Background Art

[0002] Existing radiation sensitivity test systems are mostly used for single-scene tests in electromagnetic compatibility darkrooms or outdoor fields, and the tests are carried out at fixed heights and fixed angles. However, in actual tests, some large test systems have irregular metal surfaces. In this case, if the test is still carried out directly at a fixed height and fixed angle, there will be large test errors in the test angle and test distance. In addition, the existing test method for large test systems is to place them in a large darkroom or outdoor field, place the test system on a trolley or install it on a fixed rail, and then manually adjust the antenna position, distance, height, polarization mode and pitch angle to perform radiation sensitivity testing. The position of the next test point is also adjusted manually, which greatly affects the test efficiency and accuracy.

[0003] For the testing of large test systems, there are several problems in indoor or outdoor tests:

[0004] 1) Large test systems are large in size and heavy in weight, making them inconvenient to move;

[0005] 2) Due to the large size of the test system, it is difficult to ensure that the radiation sensitivity of the test system at different angles and heights can be measured. In addition, when the test system has a curved surface, there will be errors in the test angle and test distance if the test points are selected according to the plane.

[0006] 3) The staff manually moves and replaces the radiating antenna for testing, which results in low testing efficiency, poor testing accuracy, small testing range, and poor operating experience.

[0007] Therefore, there is an urgent need to develop a radiation sensitivity testing system to solve one or more of the above-mentioned technical problems. Summary of the invention

[0008] The embodiment of the present invention provides a radiation sensitivity testing system to solve the above technical problems.

[0009] An embodiment of the present invention provides a radiation sensitivity testing system, the system comprising: a movable lifting platform and an automatic antenna rack, the automatic antenna rack being arranged above the movable lifting platform;

[0010] The automatic antenna stand comprises a mounting base and an antenna mounting frame, wherein the mounting base is fixed on the movable lifting platform, the antenna mounting frame is hinged to the mounting base, the mounting base is provided with a pitch mechanism connected to the antenna mounting frame, and the antenna mounting frame is provided with a radiation antenna, an antenna polarization device and a ranging device;

[0011] When testing the system under test, the movable lifting platform is moved to the vicinity of the system under test, and the movable lifting platform is controlled to move up and down to drive the automatic antenna frame to move up and down, thereby adjusting the radiating antenna to the test position; the antenna mounting frame is driven to move relative to the mounting base through the pitch mechanism to adjust the radiating antenna to the test azimuth and test pitch angle; the distance measuring device is used to measure the distance between the radiating antenna and the test surface of the system under test in real time; the antenna polarization device is used to perform polarization control on the radiating antenna.

[0012] According to the system of the embodiment of the present invention, the movable lifting platform includes a main frame, moving wheels arranged at the bottom of the main frame, and a lifting mechanism arranged at the top of the main frame.

[0013] According to the system of the embodiment of the present invention, the movable lifting platform further comprises an electrical control box arranged on the main frame, and the electrical control box is used to control and display various working states of the system.

[0014] According to the system of the embodiment of the present invention, the bottom of the antenna mounting frame is hinged to the mounting base through a hinge seat; the pitch mechanism includes a servo drive mechanism and an automatic telescopic mechanism arranged on the mounting base, and the automatic telescopic mechanism is connected to the antenna mounting frame;

[0015] The servo drive mechanism drives the automatic telescopic mechanism to perform telescopic movement, so as to drive the antenna installation frame to rotate around the hinge seat, thereby adjusting the azimuth angle and the pitch angle of the radiating antenna.

[0016] According to the system of the embodiment of the present invention, the automatic antenna stand further comprises a guide mechanism disposed on the mounting base, and the automatic telescopic mechanism performs telescopic movement along the guide mechanism.

[0017] According to the system of the embodiment of the present invention, the automatic antenna mount further comprises a mechanical limiting mechanism disposed on the mounting base, and the mechanical limiting mechanism is used to limit the extreme position of the telescopic movement of the automatic telescopic mechanism.

[0018] According to the system of the embodiment of the present invention, the automatic antenna mount further comprises a mechanical safety detection mechanism disposed on the mounting base, and the mechanical safety detection mechanism is used to perform electrical protection on the mechanical limiting mechanism.

[0019] According to the system of the embodiment of the present invention, the automatic antenna stand further comprises a counterweight mechanism disposed on the mounting base, for mechanically protecting the pitch of the antenna mounting frame.

[0020] According to the system of the embodiment of the present invention, the distance measuring device is installed at the geometric center of the antenna installation frame.

[0021] In the system according to the embodiment of the present invention, the distance measuring device is a laser distance meter, and the laser distance meter is also used for laser guidance of the antenna beam.

[0022] The beneficial effects brought by the present invention are as follows:

[0023] It can be seen from the above scheme that the embodiment of the present invention provides a radiation sensitivity test system that can achieve omnidirectional movement through a movable lifting platform, can adapt to outdoor and darkroom working environments, and does not need to be customized for special application scenarios; combined with the movable lifting platform, the automatic antenna mount can complete multi-degree-of-freedom movement without the need for manual adjustment by the user; and solves the technical problems existing in the testing of existing large-scale test systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A first-view structural diagram showing a radiation sensitivity testing system according to an embodiment of the present invention;

[0025] Figure 2 A schematic diagram showing a system under test according to an embodiment of the present invention;

[0026] Figure 3 Schematic diagram of a test scenario of an embodiment of the present invention Figure 1 ;

[0027] Figure 4 Schematic diagram of a test scenario of an embodiment of the present invention Figure 2 ;

[0028] Figure 5 A structural diagram from a second viewing angle of a radiation sensitivity testing system according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 100-Radiation Sensitivity Test System,

[0031] 1- movable lifting platform, 10- rotating axis, 11- main frame, 12- moving wheel, 13- lifting mechanism,

[0032] 2-automatic antenna rack, 21-mounting base, 22-antenna mounting frame, 23-hinged seat, 24-servo drive mechanism, 25-automatic telescopic mechanism, 26-guiding mechanism, 27-counterweight mechanism

[0033] 3-Radiating Antenna

[0034] 4-antenna polarization device, 14-high power switch

[0035] 5-Distance measuring device

[0036] 6-Pitch mechanism

[0037] 200 - Test system. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1 as well as Figure 3-Figure 5 As shown, an embodiment of the present invention provides a radiation sensitivity test system, the system 100 includes: a movable lifting platform 1 and an automatic antenna rack 2, the automatic antenna rack 2 is arranged above the movable lifting platform 1;

[0040] The automatic antenna rack 2 includes a mounting base 21 and an antenna mounting frame 22. The mounting base 21 is fixed on the movable lifting platform 1. The antenna mounting frame 22 is hinged to the mounting base 21. The mounting base 21 is provided with a pitch mechanism connected to the antenna mounting frame 22. The antenna mounting frame 22 is provided with a radiation antenna 3, an antenna polarization device 4 and a distance measuring device 5. When testing the test system, the movable lifting platform 1 is moved to the vicinity of the test system 200, and the movable lifting platform 1 is controlled to move up and down to drive the automatic antenna rack 2 to move up and down, thereby adjusting the radiation antenna 3 to the test position; the antenna mounting frame 22 is driven to move relative to the mounting base 21 by the pitch mechanism 6 to adjust the radiation antenna 3 to the test azimuth and test pitch angle; the distance measuring device 5 is used to measure the distance between the radiation antenna 3 and the test surface of the test system 200 in real time; the antenna polarization device 4 is used to perform polarization control on the radiation antenna 3, and the antenna polarization device 4 is controlled to be closed by the high-power switch 14.

[0041] It should be noted that the distance measuring device 5 in the embodiment of the present invention may be an ultrasonic distance measuring device, a radar, a laser radar or a millimeter wave distance measuring device, which is not specifically limited here.

[0042] In the overall design of the system in the embodiment of the present invention, safety measures such as electromagnetic compatibility and rain and wind protection are also taken.

[0043] Optionally, in the radiation sensitivity testing system 100 of the embodiment of the present invention, the movable lifting platform 1 includes a main frame 11 , moving wheels 12 arranged at the bottom of the main frame 11 , and a lifting mechanism 13 arranged at the top of the main frame 11 .

[0044] Preferably, in the radiation sensitivity testing system 100 of the embodiment of the present invention, the moving wheel 12 is a Mecanum wheel to achieve omnidirectional movement. It should be noted that the moving wheel 12 in this embodiment can also be other types of wheels, which are not listed here one by one.

[0045] Preferably, in the radiation sensitivity testing system 100 of the embodiment of the present invention, the lifting mechanism 13 adopts a scissor structure. It should be noted that the lifting mechanism 13 in this embodiment can also adopt other structures, which are not listed here one by one.

[0046] Optionally, in the radiation sensitivity testing system 100 of the embodiment of the present invention, the movable lifting platform 1 further includes an electrical control box disposed on the main frame 11 , and the electrical control box is used to control and display various working states of the system.

[0047] The radiation sensitivity test system of the embodiment of the present invention achieves omnidirectional movement through a movable lifting platform, can adapt to outdoor and darkroom working environments, does not need to be customized for special application scenarios, and can move automatically without being connected to the mains power supply. It is easy to transport during use and can simultaneously support the automatic antenna rack to work stably for a long time at high altitudes.

[0048] Optionally, in the radiation sensitivity testing system 100 of the embodiment of the present invention, the bottom of the antenna mounting frame 22 is hinged to the mounting base 21 through a hinge seat 23; the pitch mechanism 6 includes a servo drive mechanism 24 and an automatic telescopic mechanism 25 arranged on the mounting base 21, and the automatic telescopic mechanism 25 is connected to the antenna mounting frame 22; the servo drive mechanism 24 drives the automatic telescopic mechanism 25 to perform telescopic movement, so as to drive the antenna mounting frame 22 to rotate around the hinge seat 23, thereby adjusting the azimuth and pitch angles of the radiating antenna 3.

[0049] The radiation sensitivity testing system of the embodiment of the present invention is combined with a movable lifting platform, and the automatic antenna rack can complete multi-degree-of-freedom movement, including distance, azimuth and height adjustment, as well as adjustment of pitch angle and polarization angle, etc., without the need for manual adjustment by the user.

[0050] Optionally, in the radiation sensitivity testing system 100 of the embodiment of the present invention, the automatic antenna mount 2 further includes a guide mechanism 26 disposed on the mounting base 21 , and the automatic telescopic mechanism 25 performs telescopic movement along the guide mechanism 26 .

[0051] Optionally, in the radiation sensitivity testing system 100 of the embodiment of the present invention, the automatic antenna mount 2 further includes a mechanical limit mechanism disposed on the mounting base 21 , and the mechanical limit mechanism is used to limit the extreme position of the telescopic movement of the automatic telescopic mechanism 25 .

[0052] Optionally, in the radiation sensitivity testing system 100 of the embodiment of the present invention, the automatic antenna mount 2 further includes a mechanical safety detection mechanism disposed on the mounting base 21 , and the mechanical safety detection mechanism is used to perform electrical protection on the mechanical limit mechanism.

[0053] Optionally, in the radiation sensitivity testing system 100 of the embodiment of the present invention, the automatic antenna mount 2 further includes a counterweight mechanism 27 disposed on the mounting base 21 for mechanically protecting the pitch of the antenna mounting frame 22 .

[0054] It should be noted that the pitch mechanism in the embodiment of the present invention may include two groups of servo drive mechanisms 24 and automatic telescopic mechanisms 25, and correspondingly, two counterweight mechanisms 27, two mechanical limit mechanisms and two mechanical safety detection mechanisms.

[0055] In order to achieve electrical protection of the system, the embodiment of the present invention further includes an electrical safety detection switch assembly disposed on the mounting base.

[0056] The automatic antenna rack in the radiation sensitivity test system of the embodiment of the present invention has high structural strength, light weight, and high safety. It has mechanical protections such as a counterweight mechanism for pitching, an automatic telescopic mechanism, and a mechanical limit mechanism, and electrical protections such as a rotary encoder, a contact detection switch, a platform inclinometer, a mechanical limit detection switch, and a servo controller. Of course, corresponding software protection can also be set through a host computer connected to the system to achieve high safety of testers and equipment in multiple aspects.

[0057] Preferably, in the radiation sensitivity testing system 100 of the embodiment of the present invention, the distance measuring device 5 is installed at the geometric center of the antenna installation frame 22 .

[0058] Preferably, in the radiation sensitivity testing system 100 of the embodiment of the present invention, the distance measuring device 5 is a laser distance measuring device, and the laser distance measuring device is also used to perform laser guidance on the antenna beam.

[0059] The radiation sensitivity testing system of the embodiment of the present invention can realize the visual beam scanning position and the straight-line distance between the system under test through the automatic antenna stand and the laser rangefinder.

[0060] The following specifically describes the testing process of the radiation sensitivity testing system according to the embodiment of the present invention:

[0061] Among them, the host computer is connected to the radiation sensitivity test system, the radiation generation system and the field strength monitor. The radiation generation system is used to control the radiation intensity of the radiation antenna. Specifically, the radiation generation system includes a signal generator, a radio frequency switch unit, a power amplifier and a directional coupler. The host computer controls the signal generator to send a low-level signal of the corresponding frequency, and then switches the input to the power amplifier of the corresponding frequency band through the radio frequency switch unit. The output of the power amplifier passes through the directional coupler to the radiation antenna to radiate into space. The field strength value is monitored in real time by the field strength monitor, and the signal amplitude output by the signal generator is continuously adjusted until the field strength value reaches the field strength value required for the radiation sensitivity test.

[0062] Step 1: Import the simplified three-dimensional shape model of the test system 200 into the computing software of the host computer, and use the computing software to decompose the object's shape surface into several rectangular areas, such as Figure 2 shown.

[0063] Step 2: Calculate the test position, test azimuth and test elevation of the radiating antenna. The calculation process is as follows: First, determine the four vertices of the rectangular quadrilateral according to the division of a certain rectangular area, such as A1, B1, C1 and D1 in the figure; according to the division of the rectangle, its geometric center position E1 can be obtained.

[0064] Step 3: Move the movable lifting platform to the side of the test system, and then adjust the position of the movable lifting platform according to the calculated results. Raise the radiating antenna to the calculated height through the automatic antenna rack, and adjust the position of the radiating antenna to O1 (x O1 ,y O1 ,z O1 )(wherein, the spatial distance of O1E1 is the test distance, and O1 is perpendicular to the rectangular plane formed by A1, B1, C1 and D1); then the pitch angle of the radiating antenna is adjusted by the host computer. At this time, the laser rangefinder at the center of the antenna can be used to monitor in real time the distance between the current radiating antenna and the surface of the test system.

[0065] Step 4: Set the working frequency band, frequency interval, frequency stepping mode and antenna polarization mode of this radiation experiment on the host computer according to the actual situation.

[0066] Step 5: Control the radiation generation system through the host computer to generate the field strength value required for the radiation sensitivity test.

[0067] Step 6: Antenna Polarization Complete the vertical or horizontal polarization test through the high-power polarization switch, and repeat step 5 to complete the test of the other polarization.

[0068] Step 7: After completing the test of the first test position, according to the test position results calculated by the software, move the movable lifting platform and the automatic antenna rack to the next test position. After moving to the next test point, repeat steps 3 to 6 to complete the radiation sensitivity test of the current position. By analogy, the radiation sensitivity test of all test positions can be completed.

[0069] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A radiation sensitivity testing system, characterized in that: The system comprises: a movable lifting platform and an automatic antenna rack, wherein the automatic antenna rack is arranged above the movable lifting platform; The automatic antenna stand comprises a mounting base and an antenna mounting frame, wherein the mounting base is fixed on the movable lifting platform, the antenna mounting frame is hinged to the mounting base, the mounting base is provided with a pitch mechanism connected to the antenna mounting frame, and the antenna mounting frame is provided with a radiation antenna, an antenna polarization device and a ranging device; When testing the system under test, the movable lifting platform is moved to the vicinity of the system under test, and the movable lifting platform is controlled to move up and down to drive the automatic antenna frame to move up and down, thereby adjusting the radiating antenna to the test position; the antenna mounting frame is driven to move relative to the mounting base through the pitch mechanism to adjust the radiating antenna to the test azimuth and test pitch angle; the distance measuring device is used to measure the distance between the radiating antenna and the test surface of the system under test in real time; the antenna polarization device is used to perform polarization control on the radiating antenna.

2. The radiation sensitivity testing system according to claim 1, characterized in that: The movable lifting platform comprises a main frame, moving wheels arranged at the bottom of the main frame, and a lifting mechanism arranged at the top of the main frame.

3. The radiation sensitivity testing system according to claim 2, characterized in that: The movable lifting platform also includes an electrical control box arranged on the main frame, and the electrical control box is used to control and display various working states of the system.

4. The radiation sensitivity testing system according to claim 1, characterized in that: The bottom of the antenna mounting frame is hinged to the mounting base through a hinge seat; the pitch mechanism includes a servo drive mechanism and an automatic telescopic mechanism arranged on the mounting base, and the automatic telescopic mechanism is connected to the antenna mounting frame; The servo drive mechanism drives the automatic telescopic mechanism to perform telescopic movement, so as to drive the antenna installation frame to rotate around the hinge seat, thereby adjusting the azimuth angle and the pitch angle of the radiating antenna.

5. The radiation sensitivity testing system according to claim 4, characterized in that: The automatic antenna stand also includes a guide mechanism arranged on the mounting base, and the automatic telescopic mechanism performs telescopic movement along the guide mechanism.

6. The radiation sensitivity testing system according to claim 4, characterized in that: The automatic antenna stand also includes a mechanical limiting mechanism disposed on the mounting base, and the mechanical limiting mechanism is used to limit the extreme position of the telescopic movement of the automatic telescopic mechanism.

7. The radiation sensitivity testing system according to claim 6, characterized in that: The automatic antenna stand also includes a mechanical safety detection mechanism disposed on the mounting base, and the mechanical safety detection mechanism is used to perform electrical protection on the mechanical limiting mechanism.

8. The radiation sensitivity testing system according to claim 1, characterized in that: The automatic antenna stand also includes a counterweight mechanism disposed on the mounting base, which is used to mechanically protect the pitch of the antenna mounting frame.

9. The radiation sensitivity testing system according to claim 1, characterized in that: The distance measuring device is installed at the geometric center of the antenna installation frame.

10. The radiation sensitivity testing system according to any one of claims 1 to 9, characterized in that: The distance measuring device is a laser distance meter, and the laser distance meter is also used to perform laser guidance on the antenna beam.

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