C.d.n. Corporation

Lintec Corporation

Kandenko Co., Ltd.

Sanwa Electric Instrument Co., Ltd.

Ryuzo Noda

Taiga Matsushita

Yuichi Iwakata

Masami Kojima

Yoji Oura

Masakatsu Sawada

Kazuaki Matsuo

The present disclosure provides a voltage detector capable of alerting a worker to nearby presence of a voltage source regardless of the worker's awareness simply by being worn on the worker's body. In a voltage detector for detecting approach to a voltage source, a voltage induced in a human body due to approach to a voltage source is measured by a first electrode of a detection circuit, a voltage to ground is measured by a second electrode of the same circuit, the detection circuit captures a current generated due to a difference between an electric potential of the first electrode and an electric potential of the second electrode, and output from the detection circuit is displayed for warning when the human body insulated from the ground approaches the voltage source.

Voltage source approach detection voltage detector

A loop antenna is constructed by bending a linear conductor so that it forms concavo-convex portions within an antenna plane. As an example, the shape of the loop antenna comprises a long straight line portion (LP) which elongates substantially straight in the direction of the arrow X, a short straight line portion (TP) which is at a predetermined angle (&#x3b8;) with respect to the long straight line portion (LP) and shorter than the long straight line portion (LP), and a short straight line portion (TP) which is at a predetermined angle (&#x3b8;) with respect to the short straight line portion (TP) and at a predetermined angle (&#x3b8;) with respect to the long straight line portion (LP) and has approximately same length as the short straight line portion (TP), wherein an acute angle portion (TG) which is formed by the short straight line portions (TP) and (TP), and acute angle portions (TGTGand TG) each having approximately same shape as the acute angle portion (TG) are succeeding in the opposite direction of the arrow X to the vicinity of a feeding point (P).

Loop antenna, loop antenna system and wireless communication system

Growing community of inventors

Miyazaki, Japan

Ryuzo Noda