System and method for detection using ultrasonic waves

• US 7,245,558 B2
• Filed: 06/18/2004
• Issued: 07/17/2007
• Est. Priority Date: 06/18/2004
• Status: Active Grant

• Current Assignee: Symbol Technologies, LLC (Zebra Technologies Corporation)
• Original Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Inventors: Willins, Bruce A., Vollkommer, Richard M.
• Primary Examiner(s): Lobo; Ian J.
• Application Number:
  US10/871,256
• Publication Number:
  US 20050281135A1
• Time in Patent Office: 1,124 Days
• Field of Search: 367/124, 235/385, 340/825.35, 340/825.72
• US Class Current: 367/124
• CPC Class Codes: G01S 15/003 Bistatic sonar systems; Multistatic sonar systems
• CPC Class Codes: G06Q 10/087 Inventory or stock management, e.g. order filling, procurement or balancing against orders

Abstract

Described is a system and method for detection using an ultrasonic wave. The system may include a first arrangement and a second arrangement. The first arrangement may include a transmitter and a receiver. The transmitter transmits an ultrasonic wave along a surface on which items are to be stored and the receiver receives the wave after it has passed over the surface. The second arrangement receives from the first arrangement data corresponding to properties of the received wave. The second arrangement compares the properties of the received wave to properties of the transmitted wave to generate current condition value. The second arrangement determines based on the current condition value and calibration data a current condition state corresponding to a degree of the surface currently occupied by the items. The calibration data includes at least one calibration value and a corresponding calibration condition state.

Claims

1. A system, comprising:

a first arrangement including a transmitter and a receiver, the transmitter transmitting an ultrasonic wave along a surface on which items are to be stored, the receiver receiving the wave after it has passed over the surface; and

a second arrangement receiving from the first arrangement data corresponding to properties of the received wave, the second arrangement comparing the properties of the received wave to properties of the transmitted wave to generate current condition value, the second arrangement determining a current condition state corresponding to a degree of the surface currently occupied by the items based on the current condition value and calibration data, the calibration data including at least one calibration value and a corresponding calibration condition state.

2. The system according to claim 1, wherein the properties of the transmitted wave are received by the second arrangement from the transmitter.

3. The system according to claim 1, wherein the properties of the transmitted wave are stored in the second arrangement.

4. The system according to claim 1, further comprising:

a wave reflector positioned so that waves leaving the transmitter are propagated across the surface to the receiver.

5. The system according to claim 1, wherein the transmitter and the receiver mounted adjacent to one another.

6. The system according to claim 1, wherein the transmitter is situated at a first end of the surface and the receiver is situated at a second end of the surface, the first end being opposite to the second end.

7. The system according to claim 1, wherein the calibration condition state corresponds to a predetermined degree of occupancy of the surface by items stored thereon.

8. The system according to claim 7, wherein the second arrangement compares the current condition value to the calibration value and matches the current condition state corresponding to a closest of the calibrated condition states.

9. The system according to claim 1, wherein the calibration condition state is one of (i) the surface is completely free from the items, (ii) the surface is partially free from the items and (iii) the surface is completely filled with the items.

10. The system according to claim 1, wherein the system includes a plurality of the first arrangement located around at least a portion of the surface.

11. The system according to claim 10, wherein the current condition value is calculated as a function of an n-dimensional vector, the vector determined as a function of the properties of the received wave from the plurality of the first arrangements.

12. The system according to claim 1, wherein the second arrangement performs a notification procedure corresponding to the current condition state.

13. The system according to claim 1, wherein the surface is on a shelf in a store.

14. The system according to claim 12, wherein the notification procedure includes transmitting a message to a storage requesting to place at least a portion of further items on the surface, the storage storing the further items as replacement for the items.

15. The system according to claim 1, wherein the first and second arrangement communicate via a communications network.

16. The system according to claim 1, wherein the properties of the received wave include at least one of amplitude, phase, spectrum and time references.

17. The system according to claim 1, further comprising:

a liner situated on the surface, the liner having predetermined acoustical properties.

18. The system according to claim 1, wherein the current condition value is transmitted along with a unique identifier identifying the surface.

19. The system according to claim 1, wherein the wave is transmitted every predetermined time period.

20. The system according to claim 1, wherein the transmitter sends one of a single frequency wave and a broad frequency spectrum of waves to measure a impulse response function of the surface.

21. A system, comprising:

a first arrangement including a processor, a transmitter and a receiver, the transmitter transmitting an ultrasonic wave along a surface on which items are to be stored, the receiver receiving the wave after it has passed over the surface, the processor comparing properties of the received wave to properties of the transmitted wave to generate a current condition value, the processor determining based on the current condition value and calibration data a current condition state corresponding to a degree of the surface currently occupied by the items, the calibration data including at least one calibration value and a corresponding calibration condition state; and

a second arrangement receiving the current condition state from the first arrangement and executing a predefined notification procedure, the notification procedure corresponding to the current condition state.

22. The system according to claim 21, wherein the first arrangement transmits the current condition state to the second arrangement only when the current condition states is one of a plurality of predetermined threshold condition states.

23. A method, comprising:

transmitting an ultrasonic wave along a surface on which items are to be stored;

receiving the wave after it has passed over the surface;

receiving with a computing arrangement data corresponding to properties of the received wave;

comparing with the computing arrangement the properties of the received wave to properties of the transmitted wave to generate current condition value,

determining with the computing arrangement based on the current condition value and calibration data a current condition state corresponding to a degree of the surface currently occupied by the items, the calibration data including at least one calibration value and a corresponding calibration condition state.

24. The method according to claim 23, wherein the wave is transmitted from a first end of the surface and received at a second end of the surface, the first end being opposite to the second end.

25. The method according to claim 23, wherein the calibration condition state corresponds to a predetermined degree of occupancy of the surface by items stored thereon.

26. The method according to claim 25, further comprising the steps of:

comparing with the computing arrangement the current condition value to the calibration value; and

matching the current condition state corresponding to a closest of the calibrated condition states.

27. The method according to claim 23, wherein the calibration condition state is one of (i) the surface is completely free from the items, (ii) the surface is partially free from the items and (iii) the surface is completely filled with the items.

28. The method according to claim 23, further comprising the step of:

calculating the current condition value as a function of an n-dimensional vector, the vector determined as a function of the properties of a plurality of the received waves.

29. The method according to claim 23, wherein the surface is on a shelf in a store.

30. The method according to claim 23, further comprising the step of:

performing a notification procedure corresponding to the current condition state.

31. The method according to claim 30, wherein the notification procedure includes transmitting a message to a storage requesting to place at least a portion of further items on the surface, the storage storing the further items as replacement for the items.

32. The method according to claim 23, wherein the properties of the received wave include at least one of amplitude, phase, spectrum and time references.

33. The method according to claim 23, wherein a liner situated on the surface, the liner having predetermined acoustical properties.

34. The method according to claim 23, wherein the current condition value is provided to the computing arrangement along with a unique identifier identifying the surface.