Annular radiation emission testing device and testing method

Abstract

The invention discloses an annular radiation emission testing device and method, the device comprises an antenna tower with a testing antenna, an annular guide rail, a signal transmission cable and an upper computer, the antenna tower is constructed to be a movable part capable of moving along the guide rail, the antenna tower is connected with the upper computer through the signal transmission cable, and the upper computer is connected with the annular guide rail. The upper computer controls the antenna tower to move on the guide rail; the antenna tower comprises an antenna tower base, a roller, a vertical rod, a cross rod and the test antenna, the antenna tower base moves on the guide rail through the roller, the vertical rod is erected on the antenna tower base, the cross rod is configured to be a height-adjustable part installed on the vertical rod, and the test antenna is arranged on the test antenna. The test antenna is installed on the cross bar. The method is suitable for radiation emission tests of various large-scale products, and the test efficiency is high.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic compatibility radiation emission detection, and in particular to a ring-shaped radiation emission testing device and a testing method. Background Art

[0002] The conventional requirement for radiated emission testing is to ensure a stable and clean electromagnetic environment inside a semi-anechoic chamber, which has a turntable, antenna bracket, etc., and the test system is placed outside the chamber. In this method, the sample is placed on a turntable, which rotates according to software control to find the angle of maximum radiated disturbance of the sample. Due to the size of the chamber, special voltage and current, professional load, etc., the chamber cannot meet the testing of some large products.

[0003] With the rapid development of various industries, a variety of large products have appeared on the market, such as large commercial air conditioners, large medical equipment, traction systems, etc. Such equipment has the following characteristics: large size, high current and high voltage, professional load, etc. Most electromagnetic compatibility test laboratories cannot meet their test requirements, so such products are generally measured on-site according to the test outline of the customer's product and the requirements of relevant standards. Conventional on-site measurements are made by manually moving the antenna bracket and the test equipment to perform multi-angle measurements at a distance of 3 meters or 10 meters centered on the product during the test. Because the test antenna is usually more than 4 meters high, it is difficult to move it on-site, and it is impossible to cover all suspicious angles, and there is a possibility of missing the maximum emission value. In addition, there will be errors in the angle judgment of the test, resulting in poor detection reproducibility. This type of test method also has problems such as time-consuming and labor-intensive. As the market and users have higher and higher requirements for product precision and quality, traditional manual movement and positioning have become increasingly unable to meet social needs. Software plus hardware automated testing has been widely used in the production and testing of various products.

[0004] The Chinese patent with publication number CN117590089A discloses "Method and device for testing the maximum value of electromagnetic radiation emission based on panoramic scanning" to establish a sphere centered on the test sample, divide the sphere, and then use the test device and equipment to conduct a comprehensive scanning test to find the maximum value of radiation emission and record the position. Some large products have specific installation environments and installation methods, and the product under test cannot be placed in the center of the test device, so this test method cannot be used. In addition, the mechanical scanning device used in the test device will inevitably use more conductor materials. During the propagation of electromagnetic waves, it interacts with the conductor and electromagnetic waves will be emitted. The emitted electromagnetic waves are transmitted to the test antenna again and superimposed on the signal emitted by the product under test, resulting in inaccurate test results of the electromagnetic emission value of the product under test. Summary of the invention

[0005] One of the purposes of the present invention is to provide a ring-shaped radiation emission test device, which is suitable for radiation emission tests of various large products and has high test efficiency.

[0006] One of the purposes of the present invention is achieved through the following technical solution:

[0007] A ring-shaped radiation emission test device comprises an antenna tower with a test antenna, a ring-shaped guide rail, a signal transmission cable and a host computer, wherein the antenna tower is configured as a movable part that can move along the guide rail, the antenna tower is connected to the host computer through the signal transmission cable, and the host computer controls the antenna tower to move on the guide rail;

[0008] The antenna tower comprises an antenna tower base, rollers, a vertical pole, a horizontal pole and the test antenna, wherein the antenna tower base moves on the guide rail via the rollers, the vertical pole is erected on the antenna tower base, the horizontal pole is configured as a height-adjustable component mounted on the vertical pole, and the test antenna is mounted on the horizontal pole.

[0009] The test device of the present invention can take the test sample as the center, mark a specified 0° angle, lay a circular guide rail with the test distance required by the test sample as the radius, and then place an antenna tower with a test antenna on the guide rail, and connect the antenna tower to the host computer to form a test system. The host computer includes hardware and software for communicating with the test antenna. During the test, the test antenna angle, test antenna height, test limit, etc. are set according to the requirements of the customer outline and relevant standards. The test system can automatically and accurately complete the radiation emission test of the sample according to the parameters set by the host computer.

[0010] The present invention also has the following preferred design:

[0011] The cross bar of the present invention is provided with an antenna adjustment component, and the test antenna has a connecting portion connected to the antenna adjustment component, and the connecting portion is constructed as a connecting structure that can move relative to and lock with the antenna adjustment component. By installing the test antenna through the antenna adjustment component, the front and rear position of the test antenna can be fine-tuned to make the test distance between the test sample and the test antenna more accurate.

[0012] The test frequency band of the test antenna of the present invention is 30 MHz to 1 GHz, and a broadband antenna or a composite antenna can be used.

[0013] The height adjustment range of the test antenna of the present invention is 1m to 4m. There are two common types of test sample equipment: floor-standing type and desktop type. The desktop equipment needs to be placed on a 0.8m table for testing to simulate the height when in use. In order to cover the testing of all floor-standing and desktop equipment, when the test antenna moves within the height range, the received field strength changes in the form of standing waves, and the height difference between the peak and the trough is about λ / 4. In order to ensure that the maximum field strength can be found at 30MHz, λ=3×10 8 / 30MHz=10m, λ / 4=2.5m. Since the table itself is 0.8m high, the lower limit is set to 1m, and the upper limit is 0.8+2.5=3.3m. Considering the height of the antenna itself, the height adjustment range of the test antenna is 1m~4m.

[0014] The guide rail of the present invention is formed by splicing a plurality of circular arc guide rails through connecting buckles. The guide rail is detachable and can be switched and adjusted from a ring shape to a semi-ring shape, or a 1 / 4 ring shape.

[0015] A second object of the present invention is to provide a testing method using the above-mentioned annular radiation emission testing device, comprising the steps of:

[0016] S1. Place the test sample at the test position and confirm the test distance from the test antenna to the test sample;

[0017] S2. Laying a circular guide rail on a plane with the center of the test sample as the center and the test distance as the radius;

[0018] S3. Install the antenna tower on the guide rail and connect the host computer to the antenna tower;

[0019] S4 sets the initial position of the antenna tower on the guide rail, the height of the test antenna, and uses the host computer to set the moving speed of the antenna tower;

[0020] S5. Using the host computer to record the test signal strength received by the test antenna and record the corresponding test antenna position;

[0021] S6. Save the test results and the test ends.

[0022] The present invention can accurately measure the radiation emission of the test sample in a 360° range at the test sample's use site. The rotation angle of the test antenna, the test antenna height, the rotation speed of the antenna tower on the guide rail, etc. are set through the host computer software, and the test antenna position information and the radiation emission test result information are recorded synchronously, which greatly facilitates the customer's on-site radiation emission test requirements.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The testing device of the present invention has high testing flexibility and can be carried to the use site of the test sample to carry out radiation emission testing.

[0025] 2. The present invention combines a circular guide rail with an antenna tower to control the test antenna to rotate and move on the guide rail, and can accurately control the height of the test antenna as well as the moving speed and angle on the guide rail. The maximum radiation interference point of the test sample can be found by rolling 360° in the plane without missing any point, and the test result is accurate.

[0026] 3. The present invention can cover the radiation emission test of all large equipment such as floor-standing and desktop equipment, has strong versatility, and is conducive to promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A plan view of a ring-shaped radiation emission test device provided by the present invention;

[0028] Figure 2 A structural diagram of an antenna tower according to the present invention;

[0029] Figure 3 A flow chart of a ring radiation emission testing method provided by the present invention.

[0030] Description of reference numerals:

[0031] 1-guide rail; 11-connecting buckle; 2-antenna tower; 21-test antenna; 22-antenna tower base; 23-roller; 24-vertical rod; 25-cross rod; 26-antenna adjustment component; 3-signal transmission cable; 4-host computer. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present invention more obvious, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described herein. Based on the embodiments of the present invention described in the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the protection scope of the present invention.

[0033] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0034] It should be understood that the present invention can be implemented in different forms and should not be interpreted as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to make the disclosure thorough and complete and to fully convey the scope of the present invention to those skilled in the art.

[0035] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present invention. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0036] In order to fully understand the present invention, a detailed structure will be proposed in the following description to illustrate the technical solution proposed by the present invention. The optional embodiments of the present invention are described in detail as follows, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0037] like Figure 1 and Figure 2 As shown, a ring-shaped radiation emission test device includes an antenna tower 2 with a test antenna 21, a ring-shaped guide rail 1, a signal transmission cable 3 and a host computer 4, the antenna tower 2 is configured as a movable part that can move along the guide rail 1, the antenna tower 2 is connected to the host computer 4 through the signal transmission cable 3, and the host computer 4 controls the antenna tower 2 to move on the guide rail 1;

[0038] The antenna tower 2 includes an antenna tower base 22, a roller 23, a vertical rod 24, a horizontal rod 25 and a test antenna 21. The antenna tower base 22 moves on the guide rail 1 through the roller 23. The vertical rod 24 is erected on the antenna tower base 21. The horizontal rod 25 is constructed as a height-adjustable component installed on the vertical rod 24. The test antenna 21 is installed on the horizontal rod 25, and the height of the test antenna 21 can be conveniently adjusted.

[0039] In one embodiment, an antenna adjustment component 26 is provided on the cross bar 25, and the test antenna 21 has a connecting portion connected to the antenna adjustment component 26, and the connecting portion is constructed as a connecting structure that can move relative to and lock with the antenna adjustment component 26. By installing the test antenna 21 through the antenna adjustment component 26, the front and rear position of the test antenna 21 can be fine-tuned, so that the test distance between the test sample and the test antenna 21 is more accurate.

[0040] In one embodiment, the test frequency band of the test antenna is 30 MHz to 1 GHz, and a broadband antenna or a composite antenna may be used.

[0041] In one embodiment, the height adjustment range of the test antenna is 1m to 4m, which can cover the testing of all floor-standing and desktop devices.

[0042] In one embodiment, the guide rail 1 is formed by splicing a plurality of circular arc guide rails through connecting buckles 11. The guide rail 1 is detachable and can be switched and adjusted from a ring shape to a semi-ring shape, or a 1 / 4 ring shape to meet the test requirements of different test samples.

[0043] The test method of the above-mentioned ring-shaped radiation emission test device is as follows: Figure 3 As shown, the steps include:

[0044] S1. Place the test sample at the test position and confirm the test distance from the test antenna 21 to the test sample;

[0045] S2. Laying a circular guide rail 1 on a plane with the center of the test sample as the center and the test distance as the radius;

[0046] S3. Install the antenna tower 2 on the guide rail 1 and connect the host computer 4 to the antenna tower 2;

[0047] S4 sets the initial position of the antenna tower 2 on the guide rail 1, the height of the test antenna 21, and uses the host computer 4 to set the moving speed of the antenna tower 2;

[0048] S5. Use the host computer 4 to record the test signal strength received by the test antenna 21 and record the corresponding test antenna 21 position;

[0049] S6. Save the test results and the test ends.

[0050] The present invention can take the test sample as the center, mark a specified 0° angle, lay a circular guide rail 1 with the test distance required by the test sample as the radius, and then place an antenna tower 2 with a test antenna 21 on the guide rail 1, and connect the antenna tower 2 with a host computer 4 to form a test system. The host computer 4 includes hardware and software for communicating with the test antenna 21. During the test, the test angle, test antenna height, test limit, etc. are set according to the requirements of the customer outline and relevant standards, and the test system can automatically and accurately complete the radiation emission test of the sample according to the parameters set by the host computer 4.

[0051] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A ring-shaped radiation emission test device, comprising an antenna tower with a test antenna, characterized in that: It also includes a circular guide rail, a signal transmission cable and a host computer, wherein the antenna tower is configured as a movable part that can move along the guide rail, the antenna tower is connected to the host computer via the signal transmission cable, and the host computer controls the antenna tower to move on the guide rail; The antenna tower comprises an antenna tower base, rollers, a vertical pole, a horizontal pole and the test antenna, wherein the antenna tower base moves on the guide rail via the rollers, the vertical pole is erected on the antenna tower base, the horizontal pole is configured as a height-adjustable component mounted on the vertical pole, and the test antenna is mounted on the horizontal pole.

2. The annular radiation emission test device according to claim 1, characterized in that: The crossbar is provided with an antenna adjustment component, and the test antenna has a connecting portion connected to the antenna adjustment component, and the connecting portion is configured as a connecting structure capable of relative movement and locking with the antenna adjustment component.

3. The annular radiation emission test device according to claim 2, characterized in that: The test frequency band of the test antenna is: 30MHz~1GHz.

4. The annular radiation emission test device according to claim 3, characterized in that: The height adjustment range of the test antenna is 1m to 4m.

5. The annular radiation emission test device according to claim 1, characterized in that: The guide rail is formed by splicing a plurality of circular arc guide rails through connecting buckles.

6. A testing method using the annular radiation emission testing device according to any one of claims 1 to 5, characterized in that: Includes steps: S1. Place the test sample at the test position and confirm the test distance from the test antenna to the test sample; S2. Laying a circular guide rail on a plane with the center of the test sample as the center and the test distance as the radius; S3. Install the antenna tower on the guide rail and connect the host computer to the antenna tower; S4 sets the initial position of the antenna tower on the guide rail, the height of the test antenna, and uses the host computer to set the moving speed of the antenna tower; S5. Using the host computer to record the test signal strength received by the test antenna and record the corresponding test antenna position; S6. Save the test results and the test ends.

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