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Method of measuring unnecessary electromagnetic radiation, apparatus and system for measuring unnecessary electromagnetic radiation

A technology of electromagnetic radiation and measurement method, which is applied in the field of unnecessary electromagnetic radiation measurement, measurement device and measurement system, and can solve the problem of inability to use hard disk drives with interface cables and the like

Inactive Publication Date: 2006-04-05
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] [0012] In addition, as a device for evaluating unnecessary electromagnetic radiation in a single LSI, only the Work Bench Faraday Cage and the TEM cell method are available, but the structures of these devices Both are dedicated to measuring high-frequency components of LSI power supply current, and cannot be used for hard disk drives with interface cables, etc.

Method used

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  • Method of measuring unnecessary electromagnetic radiation, apparatus and system for measuring unnecessary electromagnetic radiation
  • Method of measuring unnecessary electromagnetic radiation, apparatus and system for measuring unnecessary electromagnetic radiation
  • Method of measuring unnecessary electromagnetic radiation, apparatus and system for measuring unnecessary electromagnetic radiation

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Embodiment Construction

[0024] [0019] Below, while referring to the attached Figure 1 Embodiments of the present invention will be described in detail.

[0025] 【0020】 figure 1 It is a perspective view showing the internal structure when the hard disk is installed in the unnecessary electromagnetic radiation measuring device.

[0026] [0021] In addition, in order to facilitate description of the internal structure, the housing 103 is shown as being transparent.

[0027] [0022] The unnecessary electromagnetic radiation measuring device of the present embodiment comprises: a setting fixture 102 constructed in a removable hard disk drive 101; an elongated casing 103 for fixing the setting fixture 102; A coaxial connector 104 installed at one end in the direction; an interface cable 105 connecting the hard disk drive with peripheral equipment; and a power cable 106 for supplying power to the hard disk drive 101.

[0028] [0023] In this embodiment, a long and thin hard disk drive 101 is used along the...

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PUM

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Abstract

The invention provides a detection method, a detection device and a detection system of unnecessary electromagnetic radiation. An interface cable elicited from one end of the invention is connected with a hard disk drive of the cable, and the other end on the opposite side of the end is connected with an electrical conductive clamp extending along an elicitation direction of the cable. A hollow electrical conductive box body is used for covering the electrical conductive clamp, the hard disk drive and transmission lines arraying along the elicitation direction of the cable in turn; wherein, the transmission lines form an coaxial structure with the cable. Simultaneously, potential of the electrical conductive box body and common mode electric current which flows past the interface cable and flows in a cable of a power supply are detected, and in this way, the unnecessary electromagnetic radiation from a monomer of the hard disk drive is detected.

Description

technical field [0001] [0001] The present invention relates to techniques for measuring the level of unwanted electromagnetic radiation including hard disks, that is, the level of electromagnetic interference generated therefrom. Background technique [0002] [0002] Currently, restrictions on unnecessary electromagnetic waves radiated from information processing devices have been applied to various information processing devices. For example, the FCC (abbreviation for Federal Communications Commission) in the United States and the VCCI (abbreviation for Voluntary Control Council for Information Technology Equipment) in Japan regulate unnecessary electromagnetic radiation against information processing devices. These restrictions stipulate that the electric field generated from the entire information processing device as the measurement object is measured at a distance of 3 meters or 10 meters, and the electric field intensity is limited. [0003] [0003] Since these regulati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/08
CPCG01R31/002
Inventor 鸟越诚须贺卓
Owner HITACHI LTD