Article management system
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsTakafumi Mizoguchi, Hidetomo Kobayashi
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Abstract
The present invention is an article management system using a central management device with an interrogator and an alarm portion. Because the central management device and a central response device worn by a user of the system are provided separately, loss of the central management device can be prevented. The central response device is worn by a user. The central response device communicates with the central management device wirelessly and includes a detector that detects when the communication distance reaches or exceeds a given value and an alarm portion that notifies the user of this. The central management device communicates wirelessly with one or more articles in which a response device is installed.
Claims22
An article management system, comprising:
- a central response device incorporated into a first article, wherein the first article is configured to be worn by a user;
- a response device incorporated into a second article;
- a central management device incorporated into a third article, wherein the central management device can communicate with the central response device wirelessly,
- wherein the first article is less frequently removed from the user than the second article and the third article, and
- wherein the central management device comprises:
- an interrogator that communicates wirelessly with the central response device and with the response device,
- wherein the central response device comprises:
- a detector that detects a communication distance between the interrogator and the central response device;
- and
- an alarm portion that notifies the user when the communication distance detected by the detector reaches or exceeds a standard value,
- wherein the central response device is installed in a metal accessory, and
- wherein the metal accessory is electrically connected to the central response device, and is used as an antenna.
An article management system, comprising:
- a central response device incorporated into a first article, wherein the first article is configured to be worn by a user;
- a response device incorporated into a second article, wherein the response device includes an antenna circuit;
- a central management device incorporated into a third article, wherein the central management device can communicate with the central response device wirelessly,
- wherein the first article is less frequently removed from the user than the second article and the third article, and
- wherein the central management device comprises:
- an interrogator that communicates wirelessly with the central response device and with the response device,
- wherein the central response device comprises:
- a detector that detects a communication distance between the interrogator and the central response device;
- and
- an alarm portion that notifies the user when the communication distance detected by the detector reaches or exceeds a standard value,
- wherein the central response device is installed in a metal accessory, and
- wherein the metal accessory is electrically connected to the central response device, and is used as an antenna.
Dependencies are inferred from the claim text.