Electromagnetic compatibility testing device and testing method thereof

Abstract

The present invention discloses an electromagnetic compatibility testing device and a testing method thereof, comprising a working platform, wherein a cubic test box is provided on the top plane of the working platform, the test box has four surfaces, namely a top, a bottom and two sides, the inner walls of the four surfaces of the test box are evenly provided with a plurality of threaded holes, the inner walls of the four surfaces of the test box are also provided with a plurality of track grooves and a flat plate bracket, which can simultaneously test the electromagnetic compatibility of multiple electrical products, the track grooves and the flat plate bracket are fixed to the inner walls of the test box by using bolts, the four inner walls of the test box and the working platform are all made of non-metallic materials; the internal plates of the testing device are detachable, which is convenient and quick; the four panels and the bottom working platform of the device are all made of non-metallic materials, such as acrylic plates, etc., to avoid the influence of metal materials on the electromagnetic compatibility test results and improve the accuracy of the test results.

Description

Technical Field

[0001] The present invention belongs to the field of electromagnetic compatibility, and more specifically, relates to an electromagnetic compatibility testing device and a testing method thereof. Background Art

[0002] With the rapid development of electronic technology, the variety and quantity of electronic and electrical products used in daily life are increasing. In particular, with the recent development of the smart building and smart home industries, a large number of smart home products have been incorporated into smart buildings, creating a complex electromagnetic environment within the buildings. While these products bring convenience to people, they also pose electromagnetic compatibility risks.

[0003] Electromagnetic compatibility performance refers to the ability of electronic and electrical equipment to work compatibly with other external equipment under normal working conditions, without performance degradation due to electromagnetic interference from other external equipment, and at the same time without generating electromagnetic interference to external equipment, causing performance degradation of other equipment.

[0004] Although international and domestic requirements and standards for electromagnetic compatibility testing of electronic and electrical products have long been issued, current electromagnetic compatibility testing is basically only conducted on single electronic and electrical equipment. It does not take into account the complex electromagnetic environment where multiple types and quantities of equipment work simultaneously, and there is no relevant detection equipment, which cannot meet the actual operation conditions of the equipment. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that there is a lack of electromagnetic compatibility testing methods and devices in the current environment where multiple electronic and electrical equipment work together. This patent proposes an electromagnetic compatibility testing device and its testing method to meet the electromagnetic compatibility testing needs under the conditions where multiple types and numbers of smart home devices work together in smart buildings.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an electromagnetic compatibility testing device, including a working platform, a cubic test box is provided on the top plane of the working platform, the test box has four surfaces including a top, a bottom and two sides, the four inner walls of the test box are evenly provided with a plurality of threaded holes, the four inner walls of the test box are also provided with a plurality of track grooves and a flat plate bracket, which can simultaneously test the electromagnetic compatibility of multiple electrical products, the track grooves and the flat plate bracket are fixed to the inner wall of the test box by using bolts, and the four inner walls of the test box and the working platform are made of non-metallic materials.

[0007] The invention discloses an electromagnetic compatibility testing device. Four self-locking rollers are arranged at the bottom of the working platform.

[0008] Through the above settings: the wheels have a self-locking function to avoid unnecessary movement during installation and testing.

[0009] The invention discloses an electromagnetic compatibility testing device. The four sides of the testing box are made of acrylic plates.

[0010] The above settings can avoid the influence of metal materials on the electromagnetic compatibility test results. The acrylic plate is a transparent material, which makes it easier for staff to observe the position and layout of internal equipment when placing it.

[0011] The invention discloses an electromagnetic compatibility testing device. The inner wall and the top of the testing box are further provided with a plurality of circular holes.

[0012] Through the above settings: the round hole is used to fix the wire trough, so that the wires and sockets can be arranged as needed at the power supply location of the tested product, which is easy to install and flexible to adjust.

[0013] The invention discloses an electromagnetic compatibility testing device, wherein the four inner walls of the cubic testing box are detachably connected to each other.

[0014] Through the above arrangement: the test device adopts a detachable structure and can be disassembled into several plate components when not in use, thereby saving space.

[0015] The present invention discloses an electromagnetic compatibility testing method, comprising the following steps:

[0016] S1: Preparation: Unlock the four rollers, push the work platform into the anechoic chamber, let the four rollers lock themselves, install the EMC test device on the work platform, arrange and fix the cable ducts, sockets, flat panel brackets, and track grooves according to the actual working status of the device under test, and stably place and install the home appliances under test in the designated positions.

[0017] S2: Detection phase: The shielding door of the anechoic chamber is closed, and the tester returns to the control room to open the test software, select the test standard, and start the radiated interference test. The entire test device rotates 360 degrees with the turntable, and the antenna is raised and lowered at a height of 1 to 4 meters to find the maximum radiation value. The result is expressed as the QP value. The test is performed in the vertical and horizontal polarization directions of the receiving antenna. After the radiated signal is received by the receiving antenna, it is transmitted to the receiver outside the semi-anechoic chamber through a cable;

[0018] S3: Data processing stage: Based on the test data, the worst test point (i.e., the point with the maximum radiation) is found from among the many test points and drawn. After the test points are drawn, the software starts reading the points, and finally obtains the frequency of the worst test point and the maximum radiation field strength. The measured value of the detector is compared with the limit line. If it is lower than the limit line, it will pass, and if it is higher than the limit line, it will fail.

[0019] S4: Finishing stage: After the test, remove the objects to be tested from the device, remove the wire ducts, cables, sockets, flat panel brackets (4) and track grooves (6) inside the device, as well as the side and top panels, unlock the four rollers 3 and push the entire test device out of the anechoic chamber.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The internal panels of this test device are detachable. When not in use, it can be disassembled into several panel components to save space. When in use, it can be reassembled and fixed for use, which is convenient and quick.

[0022] 2. The four panels and the bottom working platform of this device are all made of non-metallic materials, such as acrylic panels, to avoid the influence of metal materials on the electromagnetic compatibility test results and improve the accuracy of the test results.

[0023] 3. This device is equipped with multiple track slots and flat panel brackets so that multiple smart home devices can be placed directly, which can solve the practical problem of testing the electromagnetic compatibility of multiple electronic and electrical products at the same time.

[0024] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following is a brief description of the contents and symbols in the drawings of this specification:

[0026] Figure 1 is a schematic diagram of the present invention;

[0027] Figure 2 is the pore distribution diagram of the present invention;

[0028] Figure 3 This is a diagram showing the placement of devices in the anechoic chamber of the present invention.

[0029] The following are marked in the figure: 1. Test box; 2. Work platform; 3. Roller; 4. Tablet bracket; 5. Smart home appliance; 6. Track groove; 7. Smart home appliance lamp; 8. Threaded hole. DETAILED DESCRIPTION

[0030] The following, with reference to the accompanying drawings, provides a further detailed description of the specific implementation methods of the present invention, such as the shape and structure of the components involved, the relative positions and connection relationships between the components, the functions and working principles of the components, the manufacturing process and the operating methods, etc., through the description of the embodiments, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0031] Reference Figures 1 to 3An electromagnetic compatibility testing device is shown, including a work platform 2, with a cubic test box 1 provided on the top plane of the work platform 2. The test box 1 has four surfaces, namely a top, a bottom and two sides. The inner walls of the four surfaces of the test box 1 are evenly provided with multiple threaded holes 8. The four inner walls of the test box 1 are also provided with multiple track grooves 6 and a flat panel bracket 4, which can simultaneously test the electromagnetic compatibility of multiple electrical products. The track grooves 6 and the flat panel bracket 4 are fixed to the inner walls of the test box 1 by using bolts. The four inner walls of the test box 1 and the work platform are all made of non-metallic materials; four self-locking rollers 3 are provided at the bottom of the work platform 2; the four sides of the test box 1 are made of acrylic panels; the inner walls and top of the test box 1 are also provided with multiple circular holes; and the four inner walls of the cubic test box 1 are all detachably connected to each other.

[0032] Working principle and method

[0033] S1: Preparation stage: Unlock the self-locking of the four rollers 3, push the work platform 2 into the anechoic chamber, let the four rollers 3 self-lock, install the electromagnetic compatibility test device on the work platform 2, arrange and fix the wire ducts, sockets, flat panel brackets 4 and track grooves 6 according to the actual working status of the tested object, and stably place and install the tested household appliances in the designated positions;

[0034] S2: Detection phase: The shielding door of the anechoic chamber is closed, and the tester returns to the control room to open the test software, select the test standard, and start the radiated interference test. The entire test device rotates 360 degrees with the turntable, and the antenna is raised and lowered at a height of 1 to 4 meters to find the maximum radiation value. The result is expressed as the QP value. The test is performed in the vertical and horizontal polarization directions of the receiving antenna. After the radiated signal is received by the receiving antenna, it is transmitted to the receiver outside the semi-anechoic chamber through a cable;

[0035] S3: Data processing stage: Based on the test data, the worst test point (i.e., the point with the maximum radiation) is found from among the many test points and drawn. After the test points are drawn, the software starts reading the points, and finally obtains the frequency of the worst test point and the maximum radiation field strength. The measured value of the detector is compared with the limit line. If it is lower than the limit line, it will pass, and if it is higher than the limit line, it will fail.

[0036] S4: Finishing stage: After the test, remove the objects under test from the device, remove the wire ducts, cables, sockets, tablet brackets 4 and track grooves 6 inside the device, as well as the side and top panels, unlock the four rollers 3 and push the entire test device out of the anechoic chamber.

[0037] The standards in step S2 are: CISPR14-1 / GB4343.1: "Electromagnetic compatibility requirements for household electrical appliances, electric tools and similar appliances Part 1: Emission" and CISPR14-2 / GB4343.2: "Electromagnetic compatibility requirements for household electrical appliances, electric tools and similar appliances Part 2: Immunity".

[0038] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. An electromagnetic compatibility test device, comprising a work platform (2), a cubic test box (1) being provided on the top plane of the work platform (2), the test box (1) being provided with a top, a bottom and two sides, the two sides having a total of four surfaces, characterized in that: The four inner walls of the test box (1) are evenly provided with a plurality of threaded holes (8). The four inner walls of the test box (1) are also provided with a plurality of track grooves (6) and a flat panel bracket (4) for placing household appliances and testing the electromagnetic compatibility of multiple household appliances at the same time. The track grooves (6) and the flat panel bracket (4) are fixed to the inner wall of the test box (1) by using bolts. The four inner walls of the test box (1) and the working platform are all made of non-metallic materials.

2. The electromagnetic compatibility testing device according to claim 1, characterized in that: Four self-locking rollers (3) are provided at the bottom of the working platform (2).

3. The electromagnetic compatibility testing device according to claim 1, characterized in that: The four sides of the test box (1) are made of acrylic plates.

4. The electromagnetic compatibility testing device according to claim 1, characterized in that: The inner wall and top of the test box (1) are also provided with a plurality of circular holes.

5. The electromagnetic compatibility testing device according to claim 1, characterized in that: The four inner walls of the cubic test box (1) are detachably connected to each other.

6. A method for testing an electromagnetic compatibility test device according to any one of claims 1 to 5, characterized in that: The steps include: S1: Preparation stage: Unlock the self-locking of the four rollers (3), push the working platform (2) into the anechoic chamber, let the four rollers (3) self-lock, install the electromagnetic compatibility test device on the working platform (2), arrange and fix the wire trough, socket, flat panel bracket (4) and track groove (6) according to the actual working state of the object to be tested, and stably place and install the household appliances to be tested in the designated positions; S2: Detection phase: The shielding door of the anechoic chamber is closed, and the tester returns to the control room to open the test software, select the test standard, and start the radiated interference test. The entire test device rotates 360 degrees with the turntable, and the antenna is raised and lowered at a height of 1 to 4 meters to find the maximum radiation value. The result is expressed as the QP value. The test is performed in the vertical and horizontal polarization directions of the receiving antenna. After the radiated signal is received by the receiving antenna, it is transmitted to the receiver outside the semi-anechoic chamber through a cable; S3: Data processing stage: Based on the test data, the worst test point (i.e., the point with the maximum radiation) is found from among the many test points and drawn. After the test points are drawn, the software starts reading the points, and finally obtains the frequency of the worst test point and the maximum radiation field strength. The measured value of the detector is compared with the limit line. If it is lower than the limit line, it will pass, and if it is higher than the limit line, it will fail. S4: Finishing stage: After the test, remove the test object from the device, remove the wire duct, cables, sockets, flat panel bracket (4) and track groove (6) inside the device, as well as the side and top panels, unlock the four rollers (3) and push the entire test device out of the radio wave darkroom.

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