Device suitable for determining electromagnetic compatibility field test boundary and axis

Abstract

The utility model discloses a device suitable for electromagnetic compatibility field test boundary and axis determination, which comprises a base, a support column, a lifting column, a desktop plate, a projector and a connection relation thereof, the projector is arranged above the desktop of the desktop plate, a sample to be tested is placed on the desktop of the desktop plate, a laser range finder is fixedly arranged at the bottom of the projector, and the laser range finder is connected with the support column. The laser range finder is used for measuring the physical distance between the projection center and the measured sample, a computer is installed on the table top plate and comprises a database, and the database is provided with a model matched with the table top plate. According to the utility model, the height of the desktop and the physical distance between the desktop plate and the projector can be adjusted, and then the physical distance between a projection center and a measured sample is measured by the laser range finder; the downward orientation of the projector is determined, the test uncertainty is avoided by using the desktop regularity of the desktop plate, and the electromagnetic compatibility field test boundary and axis can be rapidly determined.

Description

Technical Field

[0001] The utility model relates to the technical field of conducted immunity detection for electromagnetic compatibility field testing, in particular to a device suitable for determining boundaries and axes of electromagnetic compatibility field testing. Background Art

[0002] With the rapid development of various industrial, scientific and medical fields, the equipment in these fields is developing towards high integration, high power and large size. Some large equipment has the characteristics of dangerousness and permanent installation, which makes it impossible to test the equipment and its supporting auxiliary equipment in standardized test sites. Therefore, the field test of electromagnetic compatibility of large equipment is one of the current research hotspots at home and abroad, aiming to implement its test method through standardized methods. As one of the discussion points of electromagnetic compatibility field test, how to determine the test boundary of the tested sample is the problem. By determining the test boundary of the tested sample (such as Figure 1 As shown), the test axis is determined (as Figure 2 to ensure that the sample can be covered by the irradiation area of ​​the test antenna during the actual test.

[0003] The test equipment currently used in field tests has the following defects:

[0004] 1) During the on-site test, due to the complexity of the platform plane where the sample to be tested is placed, as well as the distance between the projector and the sample to be tested, the height of the projector and the direction of the projector are all achieved by measuring with a tape measure and visual inspection, which directly increases the uncertainty of the test and the reproducibility of the test results is poor;

[0005] 2) The test device for on-site testing of the sample under test is mostly composed of multiple sub-devices, and the layout of external cables and the position of leads are relatively complex, which can easily interfere with the test boundary of the sample under test, making it difficult to identify the test boundary of the sample under test.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Utility Model Content

[0007] The purpose of the utility model is to solve the technical problems existing in the background technology, and to this end, a device suitable for determining the boundary and axis of electromagnetic compatibility field test is provided.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0009] A device suitable for determining the boundary and axis of electromagnetic compatibility field testing, comprising a base, a lifting column fixedly connected to the base, the lifting column comprising a connected support column and a lifting column, the side wall of the lifting column slidably connected to a desktop panel, the desktop panel and the lifting column are fixedly connected by a buckle, the top of the lifting column is fixedly connected to a projector, the projector is located above the desktop of the desktop panel, a sample to be tested is placed on the desktop of the desktop panel, a laser rangefinder is fixedly installed at the bottom of the projector, the laser rangefinder is used to measure the physical distance between the projection center and the sample to be tested, a computer is installed on the desktop panel, the computer includes a database, and the database has a model compatible with the desktop panel. The lifting column can be lifted up and down to adjust the height of the projector and the desktop panel, the desktop panel can adjust the desktop height along the lifting column, and is locked by the buckle, so as to adjust the physical distance between the desktop panel and the projector.

[0010] The following is a technical solution further defined by the present invention: the support column is fixedly mounted on the base, the lifting column is inside the support column and the two are connected by sliding up and down. The power source of the lifting column can be realized by a motor with a screw.

[0011] The following is a further technical solution defined by the utility model: the bottom of the desktop panel is hinged with a buckle, the lifting column is provided with a plurality of vertically parallel slots, the slots open obliquely upward, and the buckle and the slots cooperate. The buckle is hinged and buckled on the slots, the desktop panel has downward gravity, and the buckle slots open obliquely upward provide support force to the desktop panel upward, so that the desktop panel can be stably supported.

[0012] The following is a technical solution further defined by the present invention: rollers are installed at the four corners of the bottom of the base to facilitate the movement of the entire device, wherein the rollers have a locking structure.

[0013] The following is a technical solution further defined by the present invention, wherein the computer and the projector are communicatively connected to control the operation of the projector and obtain test data of the projector.

[0014] The following is a technical solution further defined by the present invention: the connecting wires of the projector are all placed inside the lifting column, so as to avoid the cables of the projector interfering with the test boundary.

[0015] Compared with the prior art, the utility model has the following technical effects:

[0016] 1. The utility model can adjust the height of the projector and the desktop by lifting and lowering the lifting column. The desktop can adjust the desktop height along the lifting column and be locked by the buckle, so as to adjust the physical distance between the desktop and the projector. Then, the laser rangefinder measures the physical distance between the projection center and the sample to be tested. The downward direction of the projector is determined, and the desktop regularity of the desktop is used. The size of the desktop is determined in advance, which avoids the uncertainty of the test, improves the accuracy of the test boundary of the sample to be tested, simplifies the test process, and combines the sample boundary example and the test axis determination example to solve the external factors of the test, so that the electromagnetic compatibility field test boundary and axis can be quickly determined.

[0017] 2. The utility model has no extra cables exposed in the test area, thereby avoiding interference of the cables with the test boundary. The overall structure is movable and has high operability.

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 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.

[0020] Figure 1 is an example diagram of sample boundaries in the background art;

[0021] Figure 2 is an example diagram of determining a test axis in the background art;

[0022] Figure 3 It is a structural schematic diagram of the utility model.

[0023] Figure numerals: 1. base; 2. lifting support; 3. desktop panel; 4. projector; 5. computer; 6. roller. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0027] like Figure 3 As shown, a device suitable for determining the boundary and axis of electromagnetic compatibility field test is provided, including a base 1, and rollers 6 are installed at the four corners of the bottom of the base 1 to facilitate the movement of the entire device, wherein the roller 6 has a locking structure, which can lock the roller 6 so that the roller 6 cannot roll. It should be noted that the locking structure of this embodiment is a prior art and is only used for those skilled in the art to understand the locking action of the roller 6.

[0028] The lifting column 2 is fixedly connected to the base 1. The lifting column 2 includes a supporting column and a lifting column connected to each other. The supporting column is fixedly installed on the base 1. The lifting column is inside the supporting column and the two are connected by sliding up and down. In this embodiment, the power source of the lifting column can be realized by a motor with a screw. The motor is installed at the bottom of the base 1. The screw is installed on the base 1 through a bearing seat. The screw and the lifting column are threadedly connected. The inner walls of the lifting column and the supporting column are matched with a slide groove and a slide rail. Therefore, when the motor works, it drives the screw to rotate, thereby making the lifting column move up and down. It should be noted that the motor with a screw is one of the embodiments of the power source of the lifting column of this embodiment, and is not limited to the use of other embodiments of the power source of the lifting column of this embodiment.

[0029] In addition, the motor can be controlled by the computer 5, so the computer 5 can control the lifting and lowering of the lifting pillar 2, and can accurately control the lifting height. The computer 5 has built-in models of various projectors 4 currently on the market, and can also customize the projector 4 parameters. The minimum 3dB beam bandwidth is calculated internally by the control part, and the projection area is automatically calculated. It should be noted that the computer 5 controls the operation of the motor and its internal calculation algorithm are not within the scope of protection of the present utility model, and are only used for technical personnel in this field to understand the control of the computer 5.

[0030] The side wall of the lifting column is slidably connected to the desktop panel 3, and the top of the lifting column is fixedly connected to the projector 4. The projector 4 is located above the desktop of the desktop panel 3. The sample to be measured is placed on the desktop of the desktop panel 3. A laser rangefinder is fixedly installed on the bottom of the projector 4. The laser rangefinder is used to measure the physical distance between the projection center and the sample to be measured. A computer 5 is installed on the desktop panel 3. The computer 5 includes a database. The database has a model that is compatible with the desktop panel 3. The lifting column can be raised and lowered to adjust the height of the projector 4 and the desktop panel 3. The desktop height of the desktop panel 3 can be adjusted along the lifting column and locked by a buckle, so as to adjust the physical distance between the desktop panel 3 and the projector 4. Then, the physical distance between the projection center and the sample to be measured is measured by the laser rangefinder. The downward direction of the projector 4 is determined, and the desktop regularity of the desktop panel 3 is used. The size of the desktop panel 3 is determined in advance, which avoids the uncertainty of the test and simplifies the test process. Finally, combined with Figure 1 Sample boundary example diagram and Figure 2 The test axis determination example diagram solves the external factors of the test and can quickly determine the electromagnetic compatibility field test boundaries and axes.

[0031] It should be noted that, in this embodiment, the desktop panel 3 model in the database is the prior art, and the algorithms or processes involved in the desktop panel 3 model are not within the protection scope of the present invention, and are only used for technical personnel in this field to understand the size requirements of the desktop panel 3, that is, in this embodiment, the size of the desktop panel 3 relative to the projector 4 is the technical solution to be protected by the present invention. The size of the desktop panel 3 must be entered into the database of the computer 5 in advance, and then according to the model of the prior art, the parameters are substituted, and the computer 5 can obtain the known desktop panel 3 model, so that the subsequent electromagnetic compatibility field test boundaries and axes can be quickly determined.

[0032] It should be noted that, in the present embodiment, the base 1, the lifting support and the desktop panel 3 are all made of polytetrafluoroethylene material, which is a high molecular polymer obtained by polymerization of polytetrafluoroethylene as a monomer. The material has the characteristics of high load-bearing capacity, fire resistance, heat resistance, cold resistance, and low friction coefficient. However, the materials of the base 1, the lifting support and the desktop panel 3 are not within the scope of protection of the present utility model, and are only used for technical personnel in this field to understand the materials of the base 1, the lifting support and the desktop panel 3.

[0033] The desktop panel 3 and the lifting column are fixedly connected by buckles. The bottom of the desktop panel 3 is hinged with buckles. The lifting column is provided with multiple slots arranged in parallel up and down. The slots open obliquely upward. The buckles and the slots cooperate with each other. The buckles are hinged and buckled on the slots. The desktop panel 3 has downward gravity. The buckle slots open obliquely upward provide support force to the desktop panel 3 upward, so that the desktop panel 3 can be stably supported.

[0034] The computer 5 is connected to the projector 4 for controlling the operation of the projector 4 and obtaining test data of the projector 4. It should be noted that in this embodiment, the algorithms or programs involved in the computer 5 controlling the projector 4 are not within the protection scope of the present utility model, and are only used for those skilled in the art to understand the cooperation between the computer 5 and the projector 4.

[0035] The connecting wires of the projector 4 are all inside the lifting column, and no extra cables are exposed in the test area, thereby avoiding interference of cables with the test boundary.

[0036] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the utility model by using the above disclosed methods and technical contents without departing from the scope of the technical solution of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the utility model without departing from the content of the technical solution of the utility model should be included in the protection scope of the utility model.

Claims

1. A device for determining boundaries and axes for electromagnetic compatibility field testing, comprising a base (1), characterized in that: The base (1) is fixedly connected to a lifting column (2), the lifting column (2) comprises a supporting column and a lifting column connected to each other, the side wall of the lifting column is slidably connected to a desktop panel (3), the desktop panel (3) and the lifting column are fixedly connected by a buckle, the top of the lifting column is fixedly connected to a projector (4), the projector (4) is located above the desktop of the desktop panel (3), a sample to be measured is placed on the desktop of the desktop panel (3), a laser rangefinder is fixedly installed at the bottom of the projector (4), the laser rangefinder is used to measure the physical distance between the projection center and the sample to be measured, a computer (5) is installed on the desktop panel (3), the computer (5) comprises a database, the database has a model adapted to the desktop panel (3), so as to determine the size of the desktop panel (3) relative to the projector (4).

2. A device for determining boundaries and axes for electromagnetic compatibility field testing according to claim 1, characterized in that: The support column is fixedly mounted on the base (1), and the lifting column is located inside the support column and the two are connected by sliding up and down.

3. A device for determining boundaries and axes for electromagnetic compatibility field testing according to claim 1, characterized in that: The bottom of the desktop panel (3) is hinged with a buckle, and the lifting column is provided with a plurality of vertically parallel slots, the slots openings are obliquely upward, and the buckle and the slots cooperate with each other.

4. The device for determining boundaries and axes for electromagnetic compatibility field testing according to claim 1, characterized in that: Rollers (6) are installed at the four corners of the bottom of the base (1).

5. The device for determining boundaries and axes for electromagnetic compatibility field testing according to claim 1, characterized in that: The computer (5) is communicatively connected to the projector (4) and is used to control the operation of the projector (4) and obtain test data of the projector (4).

6. The device for determining boundaries and axes for electromagnetic compatibility field testing according to claim 1, characterized in that: The connecting wires of the projector (4) are all located inside the lifting column.

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