JPS5825150B2 - anechoic chamber - Google Patents

Description

[Detailed description of the invention] This invention relates to an anechoic chamber.

In conventional anechoic chambers for testing and adjusting wireless devices, there is no proper means of transporting large equipment into and out of the anechoic chamber. There was no proper radio wave absorption or shielding, and various problems arose when testing in an anechoic chamber.

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to propose a complete anechoic chamber that can sufficiently handle the loading and unloading of large equipment, easily absorbs and shields radio waves.

According to this invention, the radio wave absorbing floor panel portion facing the entrance of the anechoic chamber is housed in the space formed by raising the adjacent radio wave absorbing floor panel, and this storage allows the equipment to After the equipment has been carried in, the stored radio wave absorbing floor panel portion is pulled out, and the raised radio wave absorbing floor panel portion is lowered and placed in its respective predetermined positions to complete the shielding of the anechoic chamber. be.

This will be explained below with reference to the illustrated embodiments.

FIG. 1 is a plan view showing an embodiment of an anechoic chamber according to the present invention.

On the inner surface of the anechoic chamber 1 shown in FIG. 1, radio wave absorbing panels 2 are spread over the entire ceiling, walls, and floor.

The radio wave absorption panel 2 is constructed by mounting a dielectric material such as carbon-containing styrene foam or urethane foam on a radio wave absorber plate such as a ferrite tile.

A hinged door 4 is installed at the equipment loading/unloading exit 3 of the anechoic chamber 10 and can be opened and closed as desired.

The radio wave absorbing floor panel 2a facing the swing door 4 is formed of an electrolyte absorbing movable bed A by integrating a portion corresponding to the area of the required equipment loading/unloading path 5.

An equipment loading/unloading path 5 is provided below the radio wave absorbing movable floor A, and on the equipment loading/unloading path 5, a rail 6 is laid inward from the radio wave anechoic chamber 1. Further, on the rail 6, an electric trolley I is installed. is located.

The electric trolley 7 supports the radio wave absorbing movable floor A, and therefore the electric wave absorbing movable floor A is movable inward from the entrance by the electric trolley 7.

Further to the back of the radio wave absorbing movable floor A, a radio wave absorbing elevating floor B is arranged.

This radio wave absorbing elevating floor B is supported at four corners by fluid pressure cylinders 8, and the radio wave absorbing elevating floor B is movable up and down by the fluid pressure cylinders 8.

Furthermore, the radio wave absorbing movable floor B has a length and width that can accommodate the radio wave absorbing movable floor A in the space below at its ascent limit.

Further, the entire wall surface of the anechoic chamber 1 facing the hinged door 4 has a structure of two sliding doors 9, which are separated at the center and can be slid in opposite directions.

When carrying the equipment 10 into the radio anechoic chamber 1, the radio wave absorbing elevating floor B is raised by the fluid pressure cylinder 8.

Next, the electric wave absorbing movable floor A is moved using the electric trolley 7, and is inserted into the space below the radio wave absorbing elevating floor B to be stored therein.

In this way, an equipment loading/unloading path 5 is formed, and the hinged door 4 is opened to allow a large device or a vehicle loaded with the equipment 10 to directly enter the equipment loading/unloading path 5 through the equipment loading/unloading port 3.
0 is lifted up with a crane or the like (not shown) and placed in the anechoic chamber 1.

Thereafter, the vehicle etc. are moved out of the radio anechoic chamber 1, the hinged door 4 is closed, and the electric trolley 7 is operated to pull out the radio wave absorbing movable floor A from the space below the radio wave absorbing elevating floor B and return it to the normal position. The fluid pressure cylinder 8 is operated to lower the radio wave absorption elevating floor B to a fixed position to complete shielding of the radio wave anechoic chamber 1.

Further, as shown in FIG. 4, the sliding door 9 is pulled open to open one side wall of the anechoic chamber 1, and the equipment 10 inside the anechoic chamber 1 is
It is also possible to measure irradiation propagation characteristics and the like between the device 10 and the device 10 placed outside or in another anechoic chamber in a facing relationship.

The anechoic chamber according to the present invention is as described above, and can provide the following effects.

A relatively wide equipment loading/unloading path can be easily formed, equipment can be easily and reliably shielded after loading/unloading, and breakage and damage to the electromagnetic wave absorbing panel can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the anechoic chamber floor panel structure according to the present invention, Figs. 2 and 3 are elevational views showing the structure of the crawling part, and Fig. 4 shows a set of anechoic chambers facing each other. FIG. 1...Radio wave anechoic chamber, 2...Radio wave absorption panel, 2a...Radio wave absorption floor panel, 3......
・Equipment loading/unloading exit, 4... Swinging door, 5...
...Equipment loading/unloading path, 6...Rail, 1...
...Electric trolley, 8...Fluid pressure cylinder, 9
...Sliding door, 10...Equipment. A: Radio wave absorption movable floor, B: Radio wave absorption elevating floor.

Claims (1)

[Claims] 1. In an anechoic chamber in which radio wave absorbing panels are installed to surround the entire room, a passageway for carrying in and out of equipment leading to the entrance and exit of the anechoic chamber is provided below the floor-mounted radio wave absorption panel, and above the passageway there is a radio wave absorbing movable floor and a width slightly wider than this. Radio wave absorbing elevating floors having a large length and width are laid adjacent to each other, and the movable floor is supported movably along the passageway by a transfer device provided below the floor and on the passageway, The elevating floor is supported so as to be able to rise and fall freely by an elevating device arranged under the floor, and when the elevating floor is raised by the elevating device, the movable floor supported by the transfer device is moved into the space below by operating the transfer device. What is claimed is: 1. An anechoic chamber characterized in that it is configured so that it can be housed in multiple spaces, thereby opening an equipment loading/unloading path.