Wheeled vehicle mounted with RFID tag, RFID tag, speed measurement system, and speed measurement method

• US 20080074273A1
• Filed: 09/21/2007
• Published: 03/27/2008
• Est. Priority Date: 09/22/2006
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Okamoto, Satohiro, Endo, Yuta, Uto, Noriaki
• Granted Patent: US 7,737,852 B2
• Time in Patent Office: Days
• US Class Current: 340/572.8
• CPC Class Codes: G06K 17/0022 arrangements or provisious for transferring data to distant stations, e.g. from a sensing device "transfer between computer elements G06F13/00 "; data-transmission H04L
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• CPC Class Codes: G08G 1/017 identifying vehicles G08G1/015, G08G1/054 take precedence
• CPC Class Codes: G08G 1/052 with provision for determining speed or overspeed speed measuring in general G01P
• CPC Class Codes: H04B 5/77 for interrogation

Abstract

An RFID tag having a memory portion for holding information on a wheeled vehicle is mounted on the wheeled vehicle, and an external interrogator and the RFID tag exchange information with each other. Further, an RFID tag having a memory portion for holding information on a wheeled vehicle and a communication device for exchanging information with the RFID tag are set on the wheeled vehicle. When the external interrogator and the RFID tag exchange information with each other, the communication device holds information of a situation, for example, speed information, information on date and time, and the like in the memory portion in the RFID tag.

Claims

1. A wheeled vehicle comprising:

an RFID tag comprising a memory portion,

wherein the memory portion holds identification information on a wheeled vehicle, and

wherein the RFID tag sends the identification information on a wheeled vehicle to a interrogator in a case of receiving a signal form the interrogator.

2. The wheeled vehicle according to claim 1, further comprising:

a communication device communicating with the RFID tag,

wherein the communication device sends speed information that is measured by the wheeled vehicle to the interrogator, in a case where the RFID tag communicates with the interrogator, and

wherein the memory portion holds the speed information that is measured by a wheeled vehicle.

3. The wheeled vehicle according to claim 1,

wherein the RFID tag comprises a thin film integrated circuit sealed with a first base and a second base, and

wherein each of the first base and the second base is an antistatic film.

4. The wheeled vehicle according to claim 1,

wherein the RFID tag is attached to or embedded in any of a mirror portion, a light portion, or a window portion of the wheeled vehicle.

5. The wheeled vehicle according to claim 1,

wherein the information on a wheeled vehicle includes any of identification information on a wheeled vehicle, speed information, information on date and time, information on theft, information on accident history, information on restoration history, information on tax payment, and information on penalty payment.

6. A wheeled vehicle comprising:

an RFID tag comprising a memory portion, a battery that can be charged, and a charge control circuit,

wherein the memory portion holds identification information on a wheeled vehicle,

wherein the charge control circuit examines whether or not a voltage of the battery reaches a given value, and charges the battery in a case where the RFID tag receives a signal from a interrogator, and

wherein the RFID tag sends the identification information on a wheeled vehicle to a interrogator in a case of receiving a signal form the interrogator.

7. The wheeled vehicle according to claim 6, further comprising:

a communication device communicating with the RFID tag,

wherein the communication device sends speed information that is measured by the wheeled vehicle to the interrogator, in a case where the RFID tag communicates with the interrogator, and

wherein the memory portion holds the speed information that is measured by a wheeled vehicle.

8. The wheeled vehicle according to claim 6,

wherein the RFID tag comprises a thin film integrated circuit sealed with a first base and a second base, and

wherein each of the first base and the second base is an antistatic film.

9. The wheeled vehicle according to claim 6,

wherein the RFID tag is attached to or embedded in any of a mirror portion, a light portion, or a window portion of the wheeled vehicle.

10. The wheeled vehicle according to claim 6,

wherein the information on a wheeled vehicle includes any of identification information on a wheeled vehicle, speed information, information on date and time, information on theft, information on accident history, information on restoration history, information on tax payment, and information on penalty payment.

12. The RFID tag according to claim 6, further comprising:

a thin film integrated circuit sealed with a first base and a second base, and

wherein each of the first base and the second base is an antistatic film.

13. The RFID tag according to claim 6,

wherein the information on a wheeled vehicle includes any of identification information on a wheeled vehicle, speed information, information on date and time, information on theft, information on accident history, information on restoration history, information on tax payment, and information on penalty payment.

11. An RFID tag comprising:

a memory portion;

a battery that can be charged; and

a charge control circuit,

wherein the memory portion holds identification information on a wheeled vehicle,

wherein the charge control circuit examines whether or not a voltage of the battery reaches a given value, and charges the battery in a case where the RFID tag receives a signal from a interrogator, and

wherein the RFID tag sends the identification information on a wheeled vehicle to a interrogator in a case of receiving a signal from the interrogator.

14. A speed measurement system comprising:

a first interrogator which detect first identification information on an RFID tag set on a wheeled vehicle;

a second interrogator which detect second identification information on the RFID tag set on the wheeled vehicle;

a computer that is connected to the first interrogator and the second interrogator,

wherein the second interrogator is placed to have a given distance from the first interrogator,

wherein the second interrogator detects the second identification information, after the first interrogator detects first identification information, and

wherein the computer holds first timing information on date and time in detecting the first identification information,

wherein the computer holds second timing information on date and time in detecting the second identification information,

wherein the computer calculates average speed of the wheeled vehicle between the first interrogator and the second interrogator, by the first timing information, the second timing information and the given distance.

15. The speed measurement system according to claim 14,

wherein the computer is a server computer or a computer connected to a lower part of the server computer.

16. The speed measurement system according to claim 14,

wherein the wheeled vehicle comprise a communication device communicating with the RFID tag.

17. The speed measurement system according to claim 14,

wherein the RFID tag comprises a thin film integrated circuit sealed with a first base and a second base, and

wherein each of the first base and the second base is an antistatic film.

18. The speed measurement system according to claim 14,

wherein the RFID tag comprises a battery that can be charged and a charge control circuit,

wherein the charge control circuit examines whether or not a voltage of the battery reaches a given value, and charges the battery in a case where the RFID tag receives a signal from a interrogator.

19. The speed measurement system according to claim 14,

wherein the RFID tag holds any of identification information on a wheeled vehicle, speed information, information on date and time, information on theft, information on accident history, information on restoration history, information on tax payment, and information on penalty payment.

20. A method for measuring speed comprising the steps of:

placing a first interrogator which detect first identification information on an RFID tag set on a wheeled vehicle;

placing a second interrogator which detect second identification information on the RFID tag set on the wheeled vehicle, wherein the second interrogator is placed to have a given distance from the first interrogator;

measuring first timing information on date and time in detecting the first identification information;

measuring second timing information on date and time in detecting the second identification information; and

calculating first average speed of the wheeled vehicle, by the first timing information, the second timing information and the given distance.

21. The method for measuring speed according to claim 20, further comprising the steps of:

calculating second average speed of the wheeled vehicle, by the wheeled vehicle, and

comparing the first average speed and the second average speed.

22. The method for measuring speed according to claim 20,

wherein the RFID tag comprises a thin film integrated circuit sealed with a first base and a second base, and

wherein each of the first base and the second base is an antistatic film.

23. The method for measuring speed according to claim 20,

wherein the RFID tag comprises a battery that can be charged and a charge control circuit,

wherein the charge control circuit examines whether or not a voltage of the battery reaches a given value, and charges the battery in a case where the RFID tag receives a signal from a interrogator.

24. The method for measuring speed according to claim 20,

wherein the RFID tag holds any of identification information on a wheeled vehicle, speed information, information on date and time, information on theft, information on accident history, information on restoration history, information on tax payment, and information on penalty payment.