KR102487284B1 - Stirrer device for electromagnetic wave reverberation room - Google Patents

Abstract

The embodiment of the present invention relates to a stirrer device for an electromagnetic wave reverberation chamber, and more specifically, to a stirrer device for an electromagnetic wave reverberation chamber, which can improve the uniformity of an electric field in an electromagnetic wave reverberation chamber without changing the number of the installed stirrer devices or manufacturing stirrer devices of various shapes and sizes.

Description

Stirrer device for electromagnetic wave reverberation room {STIRRER DEVICE FOR ELECTROMAGNETIC WAVE REVERBERATION ROOM}

This embodiment relates to a stirrer device for an electromagnetic wave reverberation chamber.

Electromagnetic wave reverberation chamber, in contrast to the electromagnetic wave anechoic chamber, is a measurement room in which all walls inside the room do not absorb radio waves as much as possible so that electromagnetic waves can diffuse as much as possible while having an appropriate reverberation time inside the room. to be. In other words, the electromagnetic reverberation room is a facility that provides an evaluation environment close to an actual environment in which electronic devices to measure electromagnetic compatibility (EMC) and the like will be used.

An electromagnetic wave anechoic chamber must use electromagnetic wave absorbers on all walls to absorb electromagnetic waves as much as possible, but an electromagnetic wave reverberation room must generate maximum reflection on all walls, so absorbers are not needed and can be manufactured using only metal walls.

Therefore, the electromagnetic wave reverberation chamber can be manufactured at a lower cost than the electromagnetic wave anechoic chamber, and the space required for construction is small.

In general, in an electromagnetic wave reverberation room, a stirrer device is installed inside the room to lower the lowest high frequency (LUF) inside the room, and the field uniformity of the electric field is determined through the rotational operation of the stirrer device inside the room. Uniformity) can be improved.

In the electromagnetic reverberation chamber, in order to create a test environment with high electric field uniformity, it is effective by changing the number and position of stirrer devices installed, or by installing stirrer devices having different shapes and rotating stirrer devices of different shapes. The working volume is increased.

As above, if the installed quantity of stirrer devices is changed in the electromagnetic wave reverberation chamber or stirrer devices of various shapes and sizes are installed in the electromagnetic wave reverberation chamber, the installation cost and maintenance cost increase, and the installation quantity of stirrer devices is changed or various There is a problem in that the time for manufacturing the stirrer device of the shape and size increases.

Against this background, the object of the present embodiment is a stirrer device for an electromagnetic wave reverberation chamber capable of improving the uniformity of an electric field in an electromagnetic wave reverberation chamber without changing the number of installed stirrer devices or manufacturing stirrer devices of various shapes and sizes. is to provide

In order to achieve the above object, in one aspect, this embodiment, the drive motor 420;
a bar-shaped reflector driving shaft 472 to which the driving motor 420 is connected to one end in the longitudinal direction; A part of the reflector drive shaft 472 spaced apart from the one end by a first distance is coupled in the axial direction of the reflector drive shaft 472, and is driven together with the reflector drive shaft 472 by driving the drive motor 420. When the first worm 474-1 rotates in the first rotational direction by being engaged with the first worm 474-1 rotating in one rotational direction and the thread formed on the first worm 474-1 A first worm gear including a first worm wheel (476-1) rotating in a second rotational direction perpendicular to the first rotational direction; a first reflector rotating shaft 478-1 coupled to the center of the first worm wheel 476-1 and rotating in the second rotational direction together with the first worm wheel 476-1; And formed of a material that reflects electromagnetic waves, while passing the reflector drive shaft 472 and the first worm gear through the first reflector pivot shaft coupling hole 442 formed in the center, the first reflector pivot shaft coupling hole 442 ) is coupled to one end of the first reflector pivot shaft 478-1, and the other side of the first reflector pivot shaft coupling hole 442 is coupled to the other end of the first reflector pivot shaft 478-1. Provided is a stirrer device for an electromagnetic wave reverberation chamber including a first reflector 440 that rotates in a seesaw manner by the rotation of the rotation shaft 478-1 of the first reflector.
The stirrer device for the electromagnetic wave reverberation chamber is coupled in the axial direction of the reflector drive shaft 472 at a portion spaced apart by a second distance from the portion where the first worm 474-1 is coupled to the reflector drive shaft 472, The second worm 474-2 and the second worm 474 rotating in the first rotational direction together with the reflector drive shaft 472 and the first worm 474-1 by the drive motor 420. When the second worm (474-2) rotates in the first rotational direction by being engaged with the thread formed in -2), the third rotational direction is orthogonal to the first rotational direction and opposite to the second rotational direction. a second worm gear including a rotating second worm wheel (476-2); a second reflector rotating shaft coupled to the center of the second worm wheel 476-2 and rotating in the third rotational direction together with the second worm wheel 476-2; And while passing the reflector drive shaft 472 and the second worm gear through a second reflector pivot shaft coupling hole formed in the center and formed of a material that reflects the electromagnetic waves, one side of the second reflector pivot shaft coupling hole is formed in the second reflector plate. The second reflector rotates in a seesaw manner by the rotation of the second reflector pivot shaft by being coupled with one end of the pivot shaft of the second reflector and the other end of the pivot shaft coupling hole of the second reflector is coupled with the other end of the pivot shaft of the second reflector plate. (450) may be further included.
The twist direction of the thread formed in the first worm 474-1 and the twist direction of the thread formed in the second worm 474-2 may be opposite to each other.
The stirrer device for the electromagnetic wave reverberation chamber is coupled in the axial direction of the reflector drive shaft 472 at a portion spaced apart from the portion where the second worm 474-2 is coupled to the drive shaft 472 by a third distance, and the driving A third worm 474-2 rotates in the first rotational direction together with the reflector driving shaft 472, the first worm 474-2, and the second worm 474-2 by driving the motor 420. 3) and a third worm wheel (476-) that rotates in the second rotational direction when the third worm (474-3) rotates in the first rotational direction by being engaged with the thread formed in the third worm (474-3) 3) a third worm gear including; a third reflector rotating shaft coupled to the center of the third worm wheel 476-3 and rotating in the second rotational direction together with the third worm wheel 476-3; and
The reflector drive shaft 472 and the third worm gear pass through a third reflector pivot shaft coupling hole formed in the center of a material that reflects the electromagnetic waves, and one side of the third reflector pivot shaft coupling hole is formed in the third reflector plate. A third reflector that is coupled to one end of the pivoting shaft of the reflector and the other side of the third reflector pivoting shaft coupling hole is coupled to the other end of the pivoting shaft of the third reflector to rotate in a seesaw manner by the rotation of the pivoting shaft of the third reflector ( 460) may be further included.
The twist direction of the thread formed in the first worm 474-1 and the twist direction of the thread formed in the second worm 474-2 are in opposite directions, and the twist of the thread formed in the first worm 9474-1 The direction and the twist direction of the thread formed in the third worm 474-3 may be in the same direction.

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As described above, according to the present embodiment, since the separate reflectors rotate in a seesaw manner by means of a worm gear, the shape of the reflectors can be changed in various ways when the stirrer device for the electromagnetic wave reverberation chamber is driven. The uniformity of the electric field inside the electromagnetic wave reverberation chamber can be improved without changing the number of installed rover devices or manufacturing stirrer devices of various shapes and sizes.

1 is a diagram showing an electromagnetic wave measuring system according to an exemplary embodiment.
2 is a diagram exemplarily illustrating an external appearance of an electromagnetic wave reverberation chamber according to an exemplary embodiment.
3 is a view showing the inside of an electromagnetic wave reverberation chamber according to an exemplary embodiment.
4 and 5 are diagrams showing the overall structure of a stirrer device for an electromagnetic wave reverberation room according to an embodiment.
6 to 9 are diagrams for explaining an operation method of a stirrer device for an electromagnetic wave reverberation chamber according to an embodiment.
10 is a view for explaining a coupling structure of a worm gear and an electromagnetic wave reflector of a stirrer device for an electromagnetic wave reverberation chamber according to an embodiment.
11 is a diagram for explaining a structure of a worm gear of a stirrer device for an electromagnetic wave reverberation chamber according to an embodiment.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted.

Also, terms such as first, second, A, B, (a), and (b) may be used in describing the components of the present invention. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element is directly connected or connectable to the other element, but there is another element between the elements. It will be understood that elements may be “connected”, “coupled” or “connected”.

1 is a diagram exemplarily illustrating an electromagnetic wave measurement system according to an exemplary embodiment, and FIG. 2 is a diagram exemplarily illustrating an external appearance of an electromagnetic wave reverberation chamber according to an exemplary embodiment. 3 is a view showing the inside of an electromagnetic wave reverberation chamber according to an exemplary embodiment.

1 to 3, the electromagnetic wave measuring system 100 includes an electromagnetic wave reverberation chamber 110, a stirrer device 120 for the electromagnetic wave reverberation chamber, an antenna 130, a probe 140, and a controller 150 can do.

The electromagnetic wave reverberation chamber 110 is an alternative test facility for measuring electromagnetic interference (EMI) and radiation immunity and measuring the performance of wireless communication terminals such as smart phones. In the electromagnetic wave reverberation chamber 110, the device to be measured 20 may be disposed within a working volume 10 in which appropriate field uniformity is maintained.

In one embodiment, the electromagnetic wave reverberation chamber 110 has a hexahedral shape as shown in FIG. 2, and all internal walls may be formed of a metal material capable of total reflection of electromagnetic waves.

The antenna 130 may emit electromagnetic waves for forming an electric field inside the electromagnetic wave reverberation chamber 110, and an electric field may be formed inside the electromagnetic wave reverberation chamber 110 due to the emitted electromagnetic waves.

The probe 140 may measure the strength of an electric field formed inside the electromagnetic wave reverberation chamber 110 by electromagnetic waves emitted from the antenna 130 . Here, the probe 140 may measure the strength of an electric field at a location where the device to be measured 20 is disposed.

The controller 150 supplies power to the antenna 130 so that the antenna 130 emits electromagnetic waves.

Also, the control device 150 may measure electromagnetic interference, radiation immunity, etc. of the device under test 20 using the strength of the electric field measured by the probe 140 .

Meanwhile, in order to increase measurement accuracy of electromagnetic interference and radiation immunity of the device to be measured 20, the field uniformity of the working volume 10 must be appropriately maintained.

In order to properly maintain field uniformity of the working volume 10, one or more stirrers 120 for the electromagnetic wave reverberation chamber may be installed inside the electromagnetic wave reverberation chamber 110 as shown in FIG.

In one embodiment, the electromagnetic wave reverberation chamber stirrer device 120 can improve field uniformity of the working volume 10 within the electromagnetic wave reverberation chamber 110 without changing the number of installations or the shape and size of the device.

A detailed explanation of this is as follows.

4 and 5 are diagrams showing the overall structure of a stirrer device for an electromagnetic wave reverberation room according to an embodiment.

4 and 5, the stirrer device 120 for an electromagnetic wave reverberation chamber according to an embodiment includes a first driving motor 410, a second driving motor 420, a rotating cylinder 430, and a first reflecting plate ( 440), a second reflected wave 450, a third reflector 460, and a reflector driver 470.

The first driving motor 410 is connected to one end of the rotating cylinder 430 and can be driven by power input to the stirrer device 120 for the electromagnetic wave reverberation chamber.

In other words, the first driving motor 410 to which power is applied may rotate the rotating cylinder 430 in the first rotational direction.

When the rotating cylinder 430 is rotated by the first driving motor 410, the first reflecting plate 440, the second reflecting plate 450, and the third reflecting plate 460 mechanically connected to the rotating cylinder 430 are also removed. It can rotate in one rotational direction.

In one embodiment, the first driving motor 410 may rotate the rotating cylinder 430 in a first rotational direction for a first time. After the first time elapses, the second driving motor 410 may rotate the rotary cylinder 430 in a direction opposite to the first rotational direction for a second time period. For example, the first driving motor 410 may rotate the rotating cylinder 430 counterclockwise for 1 minute and then rotate the rotating cylinder 430 clockwise for 1 minute.

The second driving motor 420 is connected to one end of the reflector drive shaft 472 (see FIG. 8 ) of the reflector driver 470 and may be driven by power input to the stirrer device 120 for the electromagnetic wave reverberation chamber.

In other words, the second driving motor 420 to which power is applied may rotate the reflector driving shaft 472 in a first rotational direction or in a direction opposite to the first rotational direction. Here, the reflector driving unit 470 is located inside the rotating cylinder 430 .

When the reflector drive shaft 472 is rotated in the first rotation direction or in the opposite direction to the first rotation direction by the second drive motor 410, each reflector mechanically connected to the reflector drive shaft 472 through a worm gear has one end raised. Alternatively, it may rotate in a seesaw manner in which it descends and the other end descends or rises opposite to one end.

Through this, the first reflector 440, the second reflector 450, and the third reflector 460 forming the first zigzag shape as shown in FIG. 6 can be gradually changed to the second zigzag shape as shown in FIG. .

When the rotational force of the second drive motor 420 is changed in the opposite direction in a state where the first reflector 440, the second reflector 450, and the third reflector 460 are changed to the second zigzag shape as shown in FIG. The first reflector 440, the second reflector 450, and the third reflector 460 may gradually change into a first zigzag shape as shown in FIG.

In one embodiment, driving timings of the first driving motor 410 and the second driving motor 420 may be different from each other.

In other words, when the first driving motor 410 is driven, the second driving motor 420 may not be driven, and when the second driving motor 420 is driving, the first driving motor 410 may not be driven. .

When the first drive motor 410 is driven, the first reflector 440, the second reflector 450, and the third reflector 460 can only rotate in the first rotational direction or in the opposite direction to the first rotational direction. there is.

Also, when the second driving motor 420 is driven, the first reflector 440, the second reflector 450, and the third reflector 460 may rotate only in a seesaw manner.

Hereinafter, a detailed configuration of the reflector driver 470 for rotating the first reflector 440, the second reflector 450, and the third reflector 460 in a seesaw manner will be described.

The reflector drive unit 470 includes a reflector drive shaft 472 as shown in FIG. 8 and includes a first worm gear composed of a first worm 474-1 and a first worm wheel 476-1. can In addition, the reflector driving unit 470 is a second worm gear consisting of a second worm 474-2 and a second worm heel 476-2, a third worm 474-3 and a third worm heel 476-2, as shown in FIG. 3) may further include a third worm gear.

In the reflector driver 470 , the reflector drive shaft 472 may be formed in a bar shape, and one end in the longitudinal direction may be connected to the second drive motor 420 .

When rotational force in the first rotational direction is generated by the second driving motor 420 , the reflector driving shaft 472 may rotate in the first rotational direction. When rotational force is generated from the second driving motor 420 in a direction opposite to the first rotational direction, the reflector drive shaft 472 may rotate in the opposite direction to the first rotational direction.

In the first worm gear, the first worm 474-1 is coupled to a part of the reflector drive shaft 472, driven by the second drive motor 420 together with the drive shaft 422 in the first rotational direction or in the first rotational direction. can rotate in the opposite direction.

In the first worm gear, the first worm heel 476-1 is engaged with the thread formed on the first worm 474-1. Here, the first worm 474-1 and the first worm heel 476-1 are engaged at right angles to each other.

Accordingly, when the first worm 474-1 rotates in the first rotational direction, the first worm heel 476-1 can rotate in a second rotational direction orthogonal to the first rotational direction.

In the second worm gear, the second worm 474-2 is coupled to the other part of the reflector drive shaft 472, and driven by the second drive motor 420, the reflector drive shaft 472 and the first worm 474-1 It can rotate in the first rotational direction or in the opposite direction of the first rotational direction.

In the second worm gear, the second worm heel 476-2 is engaged with the thread formed on the second worm 474-2. Here, the second worm 474-2 and the second worm heel 476-2 are also engaged at right angles to each other.

When the second worm 474-2 rotates in the first rotational direction, the second worm heel 476-2 can rotate in a third rotational direction perpendicular to the first rotational direction and opposite to the second rotational direction. there is.

In one embodiment, in order to make the rotation directions of the first worm heel 476-1 and the second worm heel 476-2 opposite to each other, as shown in FIG. 11, the first worm 474-1 and the second worm 474 The twist directions of the threads formed in -2) may be opposite to each other.

For example, if the twist direction of the thread formed in the first worm 474-1 is right twist as shown in 11A of FIG. 11, the twist direction of the thread formed in the second worm 474-2 is as shown in 11B of FIG. It can be a left twist.

If the twist direction of the thread formed in the first worm 474-1 is right twist and the first rotation direction is counterclockwise, the first worm heel 476-1 can rotate in a clockwise direction orthogonal to the first rotation direction. there is.

When the twist direction of the thread formed in the second worm 474-2 is left twist and the first rotation direction is counterclockwise, the second worm heel 476-2 rotates in a counterclockwise direction orthogonal to the first rotation direction. can

In the third worm gear, the third worm 474-3 is coupled to another part of the reflector drive shaft 472, and driven by the second drive motor 420 to drive the reflector drive shaft 472 and the first worm 474-1. ), and can rotate in the first rotational direction or in the opposite direction to the first rotational direction together with the second worm 474-2.

In the third worm gear, the third worm heel 476-3 is engaged with the thread formed on the third worm 474-3. Here, the third worm 474-3 and the third worm heel 476-3 are also engaged at right angles to each other.

When the third worm 474-3 rotates in the first rotational direction, the third worm heel 476-3 can rotate in a second rotational direction orthogonal to the first rotational direction.

In one embodiment, the reflector driving shaft 472 rotates in the first rotational direction, that is, the first worm 474-1, the second worm 474-2, and the third worm 474-3 rotate in the first rotational direction. When rotating to , the first worm heel 476-1 and the third worm wheel 476-3 rotate in the second rotation direction orthogonal to the first rotation direction, and the second worm heel 476-2 rotates in the first rotation direction and In order to rotate in the third rotation direction, which is orthogonal and opposite to the second rotation direction, the twist direction of the screw formed in the first worm 474-1 and the twist direction of the screw formed in the second worm 474-2 are The directions are opposite to each other, and the twist direction of the thread formed in the first worm 474-1 and the twist direction of the thread formed in the third worm 474-3 must be in the same direction.

On the other hand, in one embodiment, when the rotating cylinder 430 rotates in the first rotational direction, the reflector drive shaft 472 must rotate together with the rotating cylinder 430, so that the first reflector 440, the second reflector 450, The third reflector 460 can only rotate in the first rotational direction.

And when the reflector drive shaft 472 rotates in the first rotational direction or in the opposite direction to the first rotational direction, the rotating cylinder 430 must remain stationary, so that the first reflector 440, the second reflector 450, The third reflector 460 can rotate only in a seesaw manner.

To this end, a one-way bearing rotating in only one direction may be interposed at a portion where the reflector driving shaft 472 and the rotating cylinder 430 are mechanically connected (a rectangular dotted line portion in FIG. 8 ).

On the other hand, the first reflector rotation axis 478-1 may be coupled to the center of the first warm heel 476-1 as shown in FIG. In addition, a second reflector rotation axis (not shown) may be coupled to the center of the second worm wheel 476-2 and a third reflector rotation axis (not shown) may be coupled to the center of the third worm wheel 476-3.

The first reflector pivoting shaft 478-1 may rotate in the second rotational direction together with the first worm wheel 476-1, and the second reflecting plate pivoting shaft (not shown) may rotate with the second worm wheel 476-2. Together, they can rotate in the third rotational direction. Also, the rotation shaft (not shown) of the third reflector may rotate in the second rotational direction together with the third worm heel 476-3.

The first reflector rotation shaft 478-1 is coupled to the first reflector 440, and the first reflector 440 can be rotated in a seesaw manner through rotation of the first worm wheel 476-1.

The rotation shaft (not shown) of the second reflector is coupled to the second reflector 450 and rotates the second reflector 450 in a seesaw manner through rotation of the second worm heel 476-2.

The third reflector rotation shaft (not shown) is coupled to the third reflector 460 and rotates the third reflector 460 in a seesaw manner through rotation of the third warm heel 476-3.

The first reflector 440 is formed of a material that reflects electromagnetic waves, and as shown in FIG. 10, a first reflector pivot shaft coupling hole 442 is formed in a portion thereof. Here, the first reflector 440 may be formed in a rectangular shape, and the first reflector pivot shaft coupling hole 442 may be formed at the center of the first reflector 440 .

The first reflector 440 may be coupled to the first reflector pivot shaft 478-1 while allowing the reflector drive shaft 472 and the first worm gear to pass through the first reflector pivot shaft coupling hole 442. The first reflector 440 may be rotated in a seesaw manner by the rotation of the first reflector rotation shaft 478-1.

Here, the first reflector rotation shaft coupling hole 432 is formed long in the form of a long hole having a larger width than the outer diameter of the rotating cylinder 430 as shown in FIG. 4, and rotates when the first reflector 440 rotates in a seesaw manner. Interference with the cylinder 430 may be prevented.

The second reflector 450 formed of the same material and shape as the first reflector 440 also has a second reflector pivot shaft coupling hole (not shown) formed in a portion, and a second reflector pivot shaft coupling hole (not shown). The reflector drive shaft 472 and the second worm gear may be coupled to the second reflector pivot shaft (not shown) while passing through the reflector. The second reflector 450 may be rotated in a seesaw manner by rotation of a second reflector pivot shaft (not shown). Here, the rotation shaft coupling hole (not shown) of the second reflector may be formed at the center of the second reflector 450 .

The third reflector 460 may also be formed of the same material and shape as the first reflector 440, and a third reflector pivot shaft coupling hole (not shown) may be formed in a portion thereof. The third reflector 460 may be coupled to the third reflector pivot shaft (not shown) while passing the reflector drive shaft 472 and the third worm gear through a third reflector pivot shaft coupling hole (not shown). The third reflector 460 may be rotated in a seesaw manner by rotation of a third reflector pivot shaft (not shown). Here, the third reflector rotation shaft coupling hole (not shown) may be formed at the center of the third reflector 460 .

Further, the second reflector pivot shaft coupling hole (not shown) and the third reflector pivot shaft coupling hole (not shown) may also be formed in the same long hole shape as the first reflector pivot shaft coupling hole 442 .

As described above, since the separate reflectors rotate in a seesaw manner by means of a worm gear, the shapes of the reflectors can be changed in various ways when the stirrer device 120 for the electromagnetic wave reverberation chamber is driven, thereby causing the stirrer device The uniformity of the electric field inside the electromagnetic wave reverberation chamber 110 can be improved without changing the number of installations or manufacturing stirrers of various shapes and sizes.

Terms such as "comprise", "comprise" or "having" described above mean that the corresponding component may be inherent unless otherwise stated, and therefore do not exclude other components. It should be construed that it may further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless defined otherwise. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the meaning in the context of the related art, and unless explicitly defined in the present invention, they are not interpreted in an ideal or excessively formal meaning.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Claims (5)

drive motor 420;
a bar-shaped reflector driving shaft 472 to which the driving motor 420 is connected to one end in the longitudinal direction;
A part of the reflector drive shaft 472 spaced apart from the one end by a first distance is coupled in the axial direction of the reflector drive shaft 472, and is driven together with the reflector drive shaft 472 by driving the drive motor 420. When the first worm 474-1 rotates in the first rotational direction by being engaged with the first worm 474-1 rotating in one rotational direction and the thread formed on the first worm 474-1 A first worm gear including a first worm wheel (476-1) rotating in a second rotational direction perpendicular to the first rotational direction;
a first reflector rotating shaft 478-1 coupled to the center of the first worm wheel 476-1 and rotating in the second rotational direction together with the first worm wheel 476-1; and
The first reflector pivot shaft coupling hole 442 is formed of a material that reflects electromagnetic waves while passing the reflector drive shaft 472 and the first worm gear through the first reflector pivot shaft coupling hole 442 formed in the center. One side of is coupled with one end of the first reflector pivot shaft 478-1 and the other side of the first reflector pivot shaft coupling hole 442 is coupled with the other end of the first reflector pivot shaft 478-1. The first reflector 440 rotates in a seesaw manner by the rotation of the first reflector pivot shaft 478-1
A stirrer device for an electromagnetic wave reverberation chamber comprising a. According to claim 1,
The reflector drive shaft 472 is coupled in the axial direction of the reflector drive shaft 472 at a portion spaced apart by a second distance from the portion where the first worm 474-1 is coupled, and the drive motor 420 is driven. to the second worm 474-2 rotating in the first rotational direction together with the reflector drive shaft 472 and the first worm 474-1 and the spiral formed on the second worm 474-2. When the second worm 474-2 rotates in the first rotational direction by being engaged, the second worm wheel 476 rotates in a third rotational direction perpendicular to the first rotational direction and opposite to the second rotational direction. -2) a second worm gear including;
a second reflector rotating shaft coupled to the center of the second worm wheel 476-2 and rotating in the third rotational direction together with the second worm wheel 476-2; and
While passing the reflector drive shaft 472 and the second worm gear through a second reflector pivot shaft coupling hole formed in the center and formed of a material that reflects the electromagnetic waves, one side of the second reflector pivot shaft coupling hole is the second reflector. The second reflector rotates in a seesaw manner by the rotation of the second reflector pivoting shaft by engaging one end of the pivoting shaft of the reflector and the other side of the pivoting shaft coupling hole of the second reflector engaging with the other end of the pivoting shaft of the second reflector ( 450)
A stirrer device for an electromagnetic wave reverberation chamber further comprising a. According to claim 2,
The twisting direction of the screw formed in the first worm (474-1) and the twisted direction of the screw formed in the second worm (474-2) are opposite to each other. According to claim 2,
The drive shaft 472 is coupled in the axial direction of the reflector drive shaft 472 at a portion separated by a third distance from the portion where the second worm 474-2 is coupled, and is used to drive the drive motor 420. a third worm 474-3 rotating in the first rotational direction together with the reflector driving shaft 472, the first worm 474-1 and the second worm 474-2 and the third worm A third worm wheel 476-3 engaged with the thread formed in (474-3) to rotate in the second rotational direction when the third worm 474-3 rotates in the first rotational direction. worm gear;
a third reflector rotating shaft coupled to the center of the third worm wheel 476-3 and rotating in the second rotational direction together with the third worm wheel 476-3; and
The reflector drive shaft 472 and the third worm gear pass through a third reflector pivot shaft coupling hole formed in the center of a material that reflects the electromagnetic waves, and one side of the third reflector pivot shaft coupling hole is formed in the third reflector plate. A third reflector that is coupled to one end of the pivoting shaft of the reflector and the other side of the third reflector pivoting shaft coupling hole is coupled to the other end of the pivoting shaft of the third reflector to rotate in a seesaw manner by the rotation of the pivoting shaft of the third reflector ( 460)
A stirrer device for an electromagnetic wave reverberation chamber further comprising a. According to claim 4,
The twist direction of the thread formed in the first worm 474-1 and the twist direction of the thread formed in the second worm 474-2 are opposite to each other, and the direction of twist of the thread formed in the first worm 474-1 The stirrer device for an electromagnetic wave reverberation chamber in which the twist direction and the twist direction of the thread formed in the third worm (474-3) are in the same direction.

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