JPH10288637A - Electric wave darkroom equipped with elevating turn-table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it unnecessary to provide a large-sized door for carrying in testpieces in a wall of a wave darkroom, and to prevent measurement performance from worsening at the time of measuring by an uncontinuous joined part such as a gap, etc., formed in the wave absorber in the wall by providing an opening. SOLUTION: A wave darkroom 3 is formed in an upper-layer story so as to cover and surround the inside of the room with electromagnetic wave shielding boards and electromagnetic wave absorbers provided on the ceiling surface, floor surface, and wall surfaces, and a carrying-in route for carrying a testpiece 6 in is provided in the lower-layer story of this wave darkroom 3. Along with it, the test-piece 6 carried in is put on a turntable 4 ascendable and descendable freely. And the testpiece 6 is carried as it is on the turntable 4 into the wave darkroom 3 on the upper-layer story from an opening formed in the floor surface of the wave darkroom 3, and the state of radiation of an electromagnetic wave is measured rotating the turntable 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention measures an electromagnetic wave radiated from an automobile, a large-sized computer, a generator, and the like, and measures characteristics of an antenna and the like in a state where the influence of an external electromagnetic wave is completely shielded. Related to an anechoic chamber used for the purpose.

[0002]

2. Description of the Related Art The applicant has made many proposals on an anechoic chamber and an electromagnetic shield room. 2. Description of the Related Art Conventionally, an anechoic chamber has a dark room main body for directly measuring the transmission state of an electromagnetic wave, a measurement room for recording measurement data, a preparation room for assembling and disassembling a specimen, an office, and the like in the same plane.

[0003] The anechoic chamber is made so as to cover the inside of the room with an electromagnetic wave shield plate made of a metal plate or the like having excellent conductivity, an electromagnetic wave absorber containing ferrite tile, foamed styrene, and the like containing carbon. The specimen to be carried into the anechoic chamber is placed on a cart and carried to a turntable provided at the center of the anechoic chamber. Therefore, the larger the specimen is, such as an automobile, the more it is necessary to provide a large opening / closing door on the wall of the anechoic chamber. However, it is not so easy to provide a large-sized door, and it is not so easy to reliably connect the shield structure with the moving device that moves the door or the wall of the anechoic chamber. Even if the opening and closing door is a double door opening type or a horizontal pulling type, discontinuous joints such as gaps are formed in the electromagnetic wave absorber between the opening and closing door and the wall of the anechoic chamber, so that This has a negative effect on the measurement performance during the measurement performed. In addition, providing such an anechoic chamber in an urban area requires construction on an expensive site, which is not economically viable, and new technical proposals have been desired.

[0004] The present invention relates to an anechoic chamber provided with an anechoic chamber on the upper floor proposed for solving the above-mentioned problem and having a preparation room or the like on the lower floor for carrying out measurement, loading, assembling and disassembling of a specimen. is there.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides an electromagnetic wave shield plate or an electromagnetic wave absorber formed on a ceiling, a floor, and a wall surface of an upper floor on a ceiling surface, a floor surface, and a wall surface. Anechoic chamber is formed as described above, and on the lower floor of the anechoic chamber, a carry-in path for carrying the specimen is provided, and the carried specimen is placed on a turntable that can move up and down,
The specimen is carried into the anechoic chamber on the upper floor while the test specimen is placed on the turntable from the opening opened on the floor of the anechoic chamber, and the turntable is rotated to measure the transmission state of the electromagnetic wave. This is an anechoic chamber equipped with a lifting type turntable to solve the problem.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view, and FIG. 3 is a sectional view showing a vertically movable turntable.

As shown in FIG. 1, a measurement room for recording measurement data and a preparation room for loading, assembling and disassembling a specimen are provided on the first floor of the building structure 1. The specimen 6 carried on a trolley or the like from outside the object 1 to the first floor is lowered to the same height as the floor of the first floor.
The specimen 6 transferred on the table 4 and the lifted frame 12 are moved together with the lifting frame 12 by the pantograph lifter 5 to the anechoic chamber 3.
To the same height as the floor. In this case, the floor of the anechoic chamber 3 is provided with a small opening through which the elevating frame 12 enters, and the electromagnetic wave shield formed on the floor of the elevating frame 12 and the anechoic chamber 3 is provided. For example, a soft rubber tube is wound around and covered with an electromagnetic wave shield member, which is covered with a soft rubber tube, so that the plate 10 is electrically connected to the plate 10. I have.

The anechoic chamber 3 is provided on the second floor,
The room is covered with an electromagnetic wave shield plate 10 made of a material having excellent conductivity on the floor surface and wall surface, a ferrite tile provided on the upper surface thereof, or an electromagnetic wave absorber containing carbon in styrene foam. In this way, an anechoic chamber is formed. In the center of the anechoic chamber 3, a target for placing the specimen 1
A table 4 is provided, and stairs for moving to and from the first floor are also provided in order to check the arrangement state and the rotation state of the specimen 6. At the position of the stairs in the anechoic chamber 3, a floor opening / closing type shield door 8 that can be lifted to the inside of the anechoic chamber is provided.

The test specimen 6 on the turntable 4 is lifted together with the lifting frame 12 into an opening opening on the floor in the anechoic chamber 3. Further, the tarr moved into the anechoic chamber 3
In order to measure the electromagnetic wave transmission state of the specimen 6 placed on the table 4, a prime mover 17 supported by a bearing 13 provided at the center of the lifting frame 12 and composed of an electric motor or the like.
As a result, the sprocket gear 15 is rotated, and the rotational force rotates the ring-shaped rack. The electromagnetic waves radiated from the specimen while rotating the turntable 4 are measured and data are recorded in the measurement room 2 provided on the first floor. In addition, a power outlet or the like can be mounted on the upper surface of the table in the same manner as a turntable used in a general anechoic chamber.

As described above, the anechoic chamber 3 of the present invention can be constructed using a building constructed in an urban area and divided into an upper floor and a lower floor, or an existing building has an upper floor and a lower floor. If renovated using floors, it can be built even with a small site area, which is economical. It is needless to say that the device used for raising and lowering the turntable used in the present invention is not limited to a pantograph type lifter, but may be a cylinder push-up type.

[0011]

As described in detail above, according to the present invention, an electromagnetic shield plate or an electromagnetic wave absorber formed of a material having excellent conductivity on the ceiling / floor and wall surfaces on the upper floor. An anechoic chamber is formed so as to cover the interior of the anechoic chamber, a carry-in path for carrying the specimen is provided on the lower floor of this anechoic chamber, and the carried specimen is placed on a turntable that can be raised and lowered. The specimen can be carried into the anechoic chamber on the upper floor with the specimen placed on the turntable through the opening on the floor, and the turntable can be rotated to measure the radiation state of the electromagnetic waves. It is also possible to provide a large opening / closing door to carry the specimen into the wall, and also to provide an opening to improve the measurement performance at the time of measurement because discontinuous joints such as gaps occur in the electromagnetic absorber on the wall. Prevents adverse effects In addition, it can be divided into two floors, an upper floor and a lower floor, and the market price and the site area for construction can be narrowed. It is also effective for building construction.

[Brief description of the drawings]

FIG. 1 is a plan view showing an anechoic chamber.

FIG. 2 is a longitudinal sectional view showing an anechoic chamber on an upper floor, an electromagnetic wave measuring room on a lower floor, and the like.

FIG. 3 is a sectional view showing a turntable provided to be able to move up and down.

[Explanation of symbols]

1. Building structure 2. Electromagnetic wave measurement room 3.
... Anechoic chamber 4 ... Turntable 5 ... Pantograph lifter 6 ... Test specimen 7 ... Stairs
8 Opening / closing shield door for floor

Claims (1)

[Claims] 1. An anechoic chamber is formed on an upper floor such that an electromagnetic wave shield plate or an electromagnetic wave absorber formed of a material having excellent conductivity on a ceiling surface, a floor surface, and a wall surface surrounds the room. On the lower floor, a carry-in path for carrying the specimen is provided, and the carried specimen is placed on a turntable that can be moved up and down, and the specimen is turned from the opening opening on the floor of the anechoic chamber. An anechoic chamber equipped with a lift-type turntable, which is carried on an upper-floor anechoic chamber while being placed on a table, and the turntable is rotated to measure the radiation state of electromagnetic waves.