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

• US 7,737,852 B2
• Filed: 09/21/2007
• Issued: 06/15/2010
• Est. Priority Date: 09/22/2006
• Status: Expired due to Fees

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Uto, Noriaki, Okamoto, Satohiro, Endo, Yuta
• Primary Examiner(s): TRIEU, VAN THANH
• Application Number:
  US11/902,387
• Publication Number:
  US 20080074273A1
• Time in Patent Office: 998 Days
• Field of Search: 340/572.1, 340/572.4, 340/572.8, 340/539.11, 340/539.13, 340/904, 340/905, 340/936, 340/426.15, 340/466, 701/50, 701/96, 235/375, 235/381, 235/361
• US Class Current: 340/572.1
• 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, a battery configured to be charged, and a charge control circuit,

wherein the memory portion is configured to hold identification information on the wheeled vehicle,

wherein the RFID tag is configured to send the identification information to an interrogator in a case of receiving a signal from the interrogator, and

wherein, in the case of receiving the signal from the interrogator, the charge control circuit is configured to examine whether or not a voltage of the battery reaches a given value, and to charge the battery in a case the voltage of the battery does not reach the given value.

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

a communication device set on the wheeled vehicle,

wherein the communication device is configured to send 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 is configured to hold the speed information that is measured by the 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 identification information includes any of 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. An RFID tag comprising:

a memory portion;

a battery configured to be charged; and

a charge control circuit,

wherein the memory portion is configured to hold identification information on a wheeled vehicle,

wherein the RFID tag is configured to send the identification information to an interrogator in a case of receiving a signal from the interrogator, and

wherein, in the case of receiving the signal from the interrogator, the charge control circuit is configured to examine whether or not a voltage of the battery reaches a given value, and to charge the battery in a case the voltage of the battery does not reach the given value.

7. 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.

8. The RFID tag according to claim 6,

wherein the identification information includes any of 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.

9. A speed measurement system comprising:

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

a second interrogator configured to 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 is configured to detect the second identification information, after the first interrogator detects first identification information,

wherein the computer is configured to hold first timing information on date and time in detecting the first identification information,

wherein the computer is configured to hold second timing information on date and time in detecting the second identification information,

wherein the computer is configured to calculate 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,

wherein the RFID tag comprises a memory portion, a charge control circuit and a battery configured to be charged, and

wherein, when the RFID tag receives a signal from at least one of the first interrogator and the second interrogator, the charge control circuit is configured to examine whether or not a voltage of the battery reaches a given value and to charge the battery in a case the voltage of the battery does not reach the given value.

10. The speed measurement system according to claim 9,

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

11. The speed measurement system according to claim 9,

wherein the wheeled vehicle comprises a communication device,

wherein the communication device is configured to send speed information that is measured by the wheeled vehicle to at least one of the first interrogator and the second interrogator, in a case where the RFID tag communicates with the interrogator, and

wherein the memory portion is configured to hold the speed information that is measured by the wheeled vehicle.

12. The speed measurement system according to claim 9,

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.

13. The speed measurement system according to claim 9,

wherein the RFID tag is configured to hold 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.