Means and method for detecting the presence of at least one object to be tidied in a washroom

• US 9,875,634 B2
• Filed: 08/19/2011
• Issued: 01/23/2018
• Est. Priority Date: 08/19/2011
• Status: Expired due to Fees

• Current Assignee: Essity Hygiene and Health Aktiebolag (Essity AB)
• Original Assignee: SCA Hygiene Products AB (Essity AB)
• Inventors: Gustafsson, Anders, Saarvli, Eva-Li, Gabrielsson, Urban
• Primary Examiner(s): Alsomiri, Isam A
• Assistant Examiner(s): Abraham, Samantha K
• Application Number:
  US14/238,409
• Publication Number:
  US 20140211591A1
• Time in Patent Office: 2,349 Days
• CPC Class Codes: G01S 15/02 using reflection of acoustic waves G01S15/66 takes precedence
• CPC Class Codes: G01S 17/04 Systems determining the presence of a target
• CPC Class Codes: G01S 7/52 of systems according to group G01S15/00
• CPC Class Codes: G08B 21/18 Status alarms G08B21/02 takes precedence
• CPC Class Codes: G08B 21/245 Reminder of hygiene compliance policies, e.g. of washing hands

Abstract

A method and apparatus for determining presence of an object to be tidied in a washroom. A beam is supplied to a surface of the washroom at a first location. A reflected beam received from the surface of the washroom or received from an object in the path of the beam to the surface is detected. The presence of the object is determined from feedback from the beam based on a comparison of the feedback with a detection result when the beam reflects from the surface at the first location. An object to be tidied output signal is issued indicating that an object to be tidied is present based on the determination on the presence of an object.

Claims

1. An apparatus for determining a presence of an object to be tidied in a washroom, comprising:

a beam supply unit for supplying a beam to a surface of the washroom at a first location;

a reflected beam detection unit to receive the beam reflected from the surface of the washroom or to receive the beam reflected from an object in the path of the beam to the surface, the object in the path of the beam including the object to be tidied; and

a controller configured to (i) determine from a measured detection result from the reflected beam detection unit the presence of the object to be tidied based on a comparison of the measured detection result with a predetermined detection result previously obtained when the beam reflected from the surface at the first location, and to (ii) issue an object to be tidied output signal indicating that the object to be tidied is present based on the determination on the presence of the object to be tidied,

wherein the beam supply unit is configured to direct the beam along and parallel to a floor of a washroom so as to be able to interact with the object to be tidied on the floor.

2. The apparatus of claim 1, wherein the controller is configured to determine data indicative of a distance of a travel path of the beam from the measured detection result of the reflected beam and to determine the presence of the object to be tidied on the basis of the determined data as compared to predetermined distance data on the travel path to the surface of the washroom at the first location.

3. The apparatus of claim 1, wherein the beam supply unit and the reflected beam detection unit are embodied in a laser distance measurement device or an ultrasonic distance measurement device or other range finding technology.

4. The apparatus of claim 1, wherein the controller is configured to perform a calibration process to obtain data on a detection result to be expected when the beam reflects off of the surface of the washroom at the first location, wherein the controller is configured to store the detection result to be expected in a memory as the predetermined detection result, and the controller is configured to access the predetermined data for comparing to the current reflected beam detection result, which is the measured detection result, in determining whether the beam has reflected from the object to be tidied in the path of the beam to the washroom surface at the first location.

5. The apparatus of claim 1, wherein the apparatus comprises a calibration option that a user interfaces with to get the apparatus to perform a calibration scan when the washroom is tidy to gather predetermined data for when the beam reflects off of the surface at the first location for use as reference data in the comparison.

6. The apparatus of claim 1, wherein the beam supply unit is configured to direct the beam to a surface extending normally from the floor of the washroom.

7. The apparatus of claim 1, wherein the beam supply unit is configured to direct a plurality of beams to at least one surface of the washroom at a plurality of different locations, respectively, wherein the control unit is configured to compare a reflected beam detection result for the plurality of beams to a predetermined detection result for the beams when they travelled fully to the intended reflection surface of the washroom at the respective locations, and wherein the control unit is configured to make a determination as to the presence of at least one object to be tidied based on the comparison, the plurality of beams including the beam, the at least one surface of the washroom including the surface of the washroom, the at least one object to be tidied including the object to be tidied, and the plurality of different locations including the first location.

8. The apparatus of claim 7, wherein the beam supply unit is configured to sequentially direct the beams to the plurality of locations.

9. The apparatus of claim 8, wherein a turning unit is utilised to turn at least part of the apparatus so as to aim the beam at the next location.

10. The apparatus of claim 8, wherein the controller is configured to require a plurality of reflected beams in a single scan of the washroom to reveal reflection off of the at least one object to be tidied for the output signal to be issued indicating that the washroom requires tidying.

11. The apparatus of claim 7, configured so that the locations are distributed about the washroom to tidy a plurality of adjacent objects.

12. The apparatus of claim 7, wherein the beam supply unit is configured to distribute the beams for determining the presence of the at least one object to be tidied relative to a source of the beams throughout an arc angle of at least 60°

to 360°

.

13. The apparatus of claim 7, wherein the beams are distributed throughout a turning arc defining a scan of the washroom by a maximum separation of 20°

to 1°

.

14. The apparatus of claim 1, wherein the controller is configured to require that a positive determination on the presence of at least one object to be tidied for at least two successive scans of the beam or beams in the washroom be made before an output signal is issued indicating the presence of the object to be tidied in the washroom, the at least one object to be tidied including the object to be tidied.

15. The apparatus of claim 1, wherein the controller is configured to perform a scan of the room to determine the presence of the object to be tidied more frequently in a detection mode than in a power save mode.

16. The apparatus of claim 15, wherein the controller is configured to switch between the power save mode and the detection mode in dependence on an input signal from an empty washroom sensor indicating when the washroom is empty.

17. The apparatus of claim 16, comprising the empty washroom sensor, wherein the empty washroom sensor comprises a movement sensor, a heat sensor for detecting presence of a guest'"'"'s body heat, a light switch sensor, a light sensor and/or a door open/close sensor.

18. The apparatus of claim 1, wherein the apparatus comprises a signal sending unit that is able to wirelessly communicate with a user interface device, wherein the controller is configured to control the signal sending unit in response to the output signal indicating that the room requires tidying to the user interface device to alert the user of a maintenance requirement.

19. The apparatus of claim 1, comprising a waste bin, wherein the beam supply unit, the reflected beam detection unit and the controller are mounted to the waste bin.

20. The bin of claim 19, wherein the bin comprises a waste receiving mouth at a top end of the waste bin, wherein the beam supply unit is mounted at a bottom end of the waste bin.

21. A washroom system arranged with the apparatus of claim 1, wherein the washroom system comprises a washroom having the apparatus located therein.

22. The washroom system of claim 21, wherein the washroom comprises a washroom floor and the apparatus is arranged for determining the presence of at least one object to be tidied located on the washroom floor, the at least one object to be tidied including the object to be tidied.

23. The apparatus of claim 1, comprising at least one product dispenser, wherein the beam supply unit, the reflected beam detection unit and the controller are mounted to the at least one product dispenser.

24. The washroom system of claim 23, and a communications unit, wherein the product dispenser comprises a product level sensor and includes a transmission device for sending product level data to the communications unit, and the apparatus is configured to send data concerning the presence of at least one object to be tidied based on the determination thereof to the communications unit, wherein the communications unit is configured to communicate the product level data and the object to be tidied data so that the data can be rendered on a user interface of a maintenance personnel'"'"'s receiving device, the at least one object to be tidied including the object to be tidied.

25. A washroom system comprising the apparatus of claim 1, and a communications unit, wherein the apparatus is configured to transmit data concerning the presence of the at least one object to be tidied based on the determination thereof to the communications unit and the communications unit is configured to issue maintenance information based on the transmitted data to a maintenance attendant, the at least one object to be tidied including the object to be tidied.

26. A method of detecting a presence of an object to be tidied in a washroom, the method comprising:

directing an electromagnetic beam to a washroom surface at a first location using a beam supply unit;

detecting a reflection of the beam using a reflected beam detection unit; and

determining whether the beam has travelled a reduced travel path and has reflected from the object to be tidied in a full travel path of the beam to the washroom surface at the first location based on a comparison of a measured detection result of the reflected beam with an expected detection result if the beam had travelled to the washroom surface at the first location, to thereby determine whether the object to be tidied is present in the washroom, by utilizing a triangulation algorithm, a time of flight algorithm, and/or a phase shift algorithm;

wherein the method comprises directing the beam along and parallel to a floor of the washroom to the washroom surface at the first location in order to reflect off of any object to be tidied that is on the floor and in the way of the beam the any object to be tidied including the object to be tidied.

27. The method of claim 26, wherein the method comprises determining data indicative of a distance of an actual travel path of the beam from the detection of the reflected beam and comparing the data indicative of the distance of the actual travel path of the beam to predetermined distance data on the full travel path of the beam to the washroom surface at the first location to determine if the reduced travel path has been traversed by the beam as a result of the beam reflecting off of the object to be tidied as compared to if the beam follows the full path to the washroom surface at the first location, to thereby determine the presence of the object to be tidied.

28. The method of claim 26, wherein the beam emission and detection is performed by a laser distance measurement device, an ultrasonic distance measurement device or other range finding technology.

29. The method of claim 26, wherein the method comprises a calibration step of determining a detection result obtained by reflecting the beam off of the washroom surface at the first location and storing the detection result as predetermined data and comparing the reflected beam detection result to the predetermined data in determining whether the beam has reflected instead from the object to be tidied in the way of the beam on its path to the washroom surface at the first location.

30. The method of claim 26, wherein the method comprises interfacing, by a user, with a calibration option to get the apparatus to perform a calibration scan when the washroom is tidy to gather predetermined data for when the beam reflects off of the washroom surface at the first location for use as reference data in the comparison step.

31. The method of claim 26, wherein the beam is directed at a surface of the washroom extending normally from the floor, which provides the washroom surface at the first location.

32. The method of claim 26, wherein the method comprises directing a plurality of beams at at least one surface of the washroom at a plurality of different locations, respectively and comparing a reflected beam detection result to a predetermined detection result for when the beam reflects off of a respective one of the at least one surface of the washroom at the plurality of locations and making a determination as to a presence of the at least one object to be tidied based on the comparison, the plurality of beams including the electromagnetic beam, the at least one surface of the washroom including the washroom surface, and the plurality of different locations including the first location.

33. The method of claim 32, wherein the beam supply unit is configured to sequentially direct the beams to the plurality of locations.

34. The method of claim 32, wherein the plurality of beams are distributed so that at least two paper towels on the washroom floor that are adjacent to one another interact with respective beams.

35. The method of claim 32, wherein the beam supply unit is configured to distribute the beams for determining the presence of the at least one object to be tidied relative to a source of the beams throughout an arc angle of at least 60°

to at least 180°

.

36. The method of claim 32, wherein the beams are distributed throughout a turning arc defining a scan of the washroom by a maximum separation of 20°

to a maximum separation of 1°

.

37. The method of claim 32, comprising requiring a plurality of reflected beams in a single scan of the washroom to reveal reflection off of the at least one object to be tidied for an output signal to be issued indicating that the washroom requires tidying.

38. The method of claim 26, comprising requiring a positive determination of the presence of the at least one object to be tidied for at least two successive scans of the beam or beams in the washroom before an output alert signal is issued indicating the presence of the at least one object to be tidied in the washroom.

39. The method of claim 26, wherein a signal is sent to a user interface device to communicate to a user that a tidying operation is required in the washroom when an output signal indicates the presence of the at least one object to be tidied based on the determining of whether the at least one object to be tidied is present in the washroom.

40. The method of claim 39, comprising:

responding, by a user, to the user interface signal; and

consequently going, by a maintenance person, to the washroom to tidy the at least one object.

41. The method of claim 26, comprising switching between a power save mode and a detection mode when the washroom is empty of guests, wherein the power save mode has less frequent scans of the beam in the washroom for determining the presence of the at least one object to be tidied and the detection mode has more frequent scans.