Inventory control system

• US 6,967,563 B2
• Filed: 04/08/2002
• Issued: 11/22/2005
• Est. Priority Date: 06/11/1999
• Status: Expired due to Fees

• Current Assignee: Rfid Tracker, Ltd.
• Original Assignee: Ronald Bormaster
• Inventors: Bormaster, Ronald
• Primary Examiner(s): Horabik, Michael
• Assistant Examiner(s): BANGACHON, WILLIAM L
• Application Number:
  US10/118,524
• Publication Number:
  US 20020158751A1
• Time in Patent Office: 1,324 Days
• Field of Search: 340/10.2, 340/10.1, 340/10.31, 340/10.32, 340/10.33, 340/10.5, 340/5.92, 340/825.49, 235/383, 235/385, 370/445, 342/457
• US Class Current: 340/10.31
• CPC Class Codes: A63B 2055/402 Warning devices for indicating missing golf clubs
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: G06K 7/10029 the collision being resolved in the time domain, e.g. using binary tree search or RFID responses allocated to a random time slot
• CPC Class Codes: G06K 7/10316 using at least one antenna particularly designed for interrogating the wireless record carriers antennas in general H01Q1/22
• CPC Class Codes: G06Q 10/087 Inventory or stock management, e.g. order filling, procurement or balancing against orders
• CPC Class Codes: G08B 13/1427 with transmitter-receiver for distance detection
• CPC Class Codes: G08B 25/10 using wireless transmission systems G08B25/009 takes precedence

Abstract

An inventory control system is described which includes anti-collision, radio frequency identification apparatus or tags affixed to each item of an inventory and including a unique code, an interrogator/reader that generates a field of sufficient range to activate each tag associated with each item of the inventory in communication with a computer. The computer includes a list comprising an identifier for each item in the inventory, the code for the tag associated with each item in the inventory and an item status where the status indicates whether the item is present or absent.

Claims

1. An inventory control apparatus comprising:

a computer including;

a list implemented therein comprising;

a unique item identifier for each item in an inventory;

a unique item code; and

an item status;

an anti-collision, field activated apparatus affixed to each item in the inventory including a programmable memory storing its unique item code, a transmitter, anti-collision hardware and software and an antenna; and

an interrogator/reader in communication with the computer and including;

a field generator capable of generating a field having a range characterized by a radius centered at the generator and a field strength sufficient to activate any field activated apparatus affixed to an item within the range of the generated field; and

a receiver,

where each anti-collision, field activated apparatus affixed to an item of inventory within the range of the generated field periodically transmits a signal including its unique item code only when anti-collision hardware and software of each anti-collision, field activated apparatus determines that no other anti-collision, field activated apparatus is transmitting its periodic signal and where the status of each item whose field activated apparatus has transmitted its signal to the receiver of the interrogator/reader is set to a first state indicating that the item is inside the range of the generated field, while the status of all other items is set to a second state indicating that the all other items are outside of the range of the generated field.

2. The apparatus of claim 1, wherein the computer further comprises:

a processing unit for executing instructions;

a memory in electrical communication with the processing unit for storing an operating system, list processing software and the lists;

a peripheral in electrical communication with the processing unit and the memory for interfacing with a user; and

communication hardware and software in electrical communication with the processing unit and the memory for wireless and non-wireless communication with the interrogator/reader and the peripheral.

3. The apparatus of claim 1, wherein the field is an RF field.

4. The apparatus of claim 1, wherein each unique item code is at least 7 bits in length.

5. The apparatus of claim 1, wherein each unique item code is at least 15 bits in length and the field activated apparatus transmits a signal having a frequency between about 10 and 15 MHz.

6. The apparatus of claim 5, wherein the items are golf clubs and the inventory control apparatus is associated with a golf bag.

7. The apparatus of claim 5, wherein the items are medical equipment used in medical procedures and the inventory control apparatus is associated with an equipment table in an operating room.

8. The apparatus of claim 5, wherein the items are children and the inventory control apparatus is associated with a playground or play area.

9. The apparatus of claim 5, wherein the items are animals and the inventory control apparatus is associated with a pasture or corral.

21. The apparatus of claim 1, wherein each field activated apparatus transmits a periodic signal only when no other field activated apparatus transmits a periodic signal.

10. A golf club bag inventory apparatus comprising:

a golf club bag;

a housing removably attached to the bag including;

a digital processing unit having;

a list implemented therein comprising;

a unique item identifier for each item in an inventory;

a unique item code; and

an item status;

an interrogator/reader apparatus in communication with the computer and capable of generating a field having a range characterized by a radius centered at the interrogator/reader and a field strength sufficient to activate all field activated apparatuses within the bag; and

a power source for supplying electrical power to the digital processing unit and the interrogator/reader;

a plurality of field activated apparatus affixed to each item to be place within the bag, each field activated apparatus including a programmable memory storing its unique item code, a transmitter, anti-collision hardware and software and an antenna and capable of transmitting a modulated signal including its unique item code when activated by the field generated by the interrogator/reader; and

where each field activated apparatus associated with an item within the range of the field periodically transmits its uniquely modulated signal only when anti-collision hardware and software of each anti-collision, field activated apparatus determines that no other anti-collision, field activated apparatus is transmitting its periodic signal and where an item status is set to a first state if its unique item code is received by the interrogator/reader and set to a second state if its unique item code is not received by the interrogator/reader.

11. The bag of claim 10, wherein the digital processing unit further comprises:

a processing unit for executing instructions;

a memory in electrical communication with the processing unit for storing an operating system, list processing software and the lists;

a peripheral in electrical communication with the processing unit and the memory for interfacing with a user; and

communication hardware and software in electrical communication with the processing unit and the memory for wireless and non-wireless communication with the interrogator/reader and the peripheral.

12. The bag of claim 10, wherein the field is an RF field.

13. The bag of claim 10, wherein each unique item code is at least 7 bits in length.

14. The bag of claim 10, wherein each unique item code is at least 15 bits in length and the field activated apparatus transmits a signal having a frequency between about 10 and 15 MHz.

22. The apparatus of claim 10, wherein each field activated apparatus transmits a periodic signal only when no other field activated apparatus transmits a periodic signal.

15. A method for inventory control comprising the steps of:

affixing to each item in an inventory a field activated apparatus including a programmable memory storing its unique item code, a transmitter, anti-collision hardware and software and an antenna and, upon activation, capable of transmitting a signal modulated with the unique item code;

generating a field having a range characterized by a radius centered at a field generator associated with an interrogator/reader and a field strength sufficient to activate any field activated apparatus affixed to any item of the inventory within the range;

receiving periodic signals transmitted by each field activated apparatus associated with each item within the range of the field only when anti-collision hardware and software of each field activated apparatus determines that no other anti-collision, field activated apparatus is transmitting its periodic signal;

setting an item status to a present state in a list implemented on a digital processing unit associated with the interrogator/reader, where the list includes at least an unique item identifier for each item in the inventory, the unique code for the field activated apparatus affixed to each item, and the item status for each signal corresponding to an item in the inventory received in the receiving step; and

setting the item status to an absent state for each item for which no signal was receive in the receiving step.

16. The method of claim 15, further comprising the step of:

outputting the list indicating which items of the inventory are in a present state and which are in an absent state.

17. The method of claim 16, wherein the digital processing unit further comprises:

a processing unit for executing instructions;

a memory in electrical communication with the processing unit for storing an operating system, list processing software and the lists;

a peripheral in electrical communication with the processing unit and the memory for interfacing with a user; and

communication hardware and software in electrical communication with the processing unit and the memory for wireless and non-wireless communication with the interrogator/reader and the peripheral.

18. The method of claim 15, wherein the field is an RF field.

19. The method of claim 15, wherein each unique code is at least 7 bits in length.

20. The method of claim 15, wherein each unique code is at least 15 bits in length and the field activated apparatus transmits a signal having a frequency between about 10 and 15 MHz.

23. The method of claim 15, wherein each field activated apparatus transmits a periodic signal only when no other field activated apparatus transmits a periodic signal.