Pressure sensitive mat

Patent metadata

Field	Value
Publication number	US-11124390-B2
Application number	US-201815986490-A
Country	US
Kind code	B2
Filing date	May 22, 2018
Priority date	May 22, 2018
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

A pressure sensitive mat is provided. The pressure sensitive mat includes a nanocomposite film, a first conductive foil, an oxide layer interposed between a first side of the nanocomposite film and the first conductive foil, a second conductive foil and a nanotube film interposed between a second side of the nanocomposite film, which is opposite the first side, and the second conductive foil.

First claim

What is claimed is:

1. A personal transportation system, comprising:
a body configured to transport an individual from a first location to a second location,
the body comprising doors which are movable in a plane between open and closed positions;
an entryway located at the first location and comprising a pressure sensitive mat configured to detect a presence of the individual out of the plane in which the doors are movable; and
a control system configured to control movements of the doors between the open and closed positions based on a reading of the pressure sensitive mat,
wherein the pressure sensitive mat comprises:
a first film;
one of a layer and a second film interposed between the first film and a first conductive foil; and
the other of the layer and the second film interposed between the first film and a second conductive foil.

2. The personal transportation system according to claim 1 , further comprising additional sensors configured to sense individuals in and around the entryway wherein:
the body comprises an elevator car and the doors comprise first and second elevator doors, and
the reading of the pressure sensitive mat and readings of the additional sensors are analyzed and interpreted by the control system for executing corresponding door actions.

3. The personal transportation system according to claim 2 , wherein, in an event the reading of the pressure sensitive mat and readings of the additional sensors are indicative of an individual being present in the plane, the control system controls the movements of the doors by at least one of:
maintaining the doors in an open condition;
continuing an opening of the doors; and
reversing a closing of the doors.

4. The personal transportation system according to claim 2 , wherein, in an event the reading of the pressure sensitive mat and readings of the additional sensors are indicative of an individual being present in the entryway with intent and authorization to board the elevator car, the control system controls the movements of the doors by at least one of:
maintaining the doors in an open condition;
continuing an opening of the doors; and
reversing a closing of the doors.

5. The personal transportation system according to claim 4 , wherein the intent to board the elevator car is indicated by at least one of:
pressure of a predefined magnitude being applied to the pressure sensitive mat for a predefined period of time, and
readings of the additional sensors that are indicative of the individual being rushed.

6. The personal transportation system according to claim 4 , wherein the authorization to board the elevator car is indicated by evidence that the individual is not a small child.

7. The personal transportation system according to claim 1 , wherein the pressure sensitive mat comprises:
a laminated, rubbery layer; and
a pressure sensitive thin film embedded underneath the laminated, rubbery layer,
the pressure sensitive film comprising at least one of polyvinylidene fluoride (PVDF) and lead zirconate titanate (PZT).

8. The personal transportation system according to claim 1 , wherein:
the first film comprises a nanocomposite film, the second film comprises a nanotube film and the layer comprises an oxide layer;
a first conductive foil;
the oxide layer is interposed between a first side of the nanocomposite film and the first conductive foil,
the nanotube film is interposed between a second side of the nanocomposite film, which is opposite the first side, and the second conductive foil, and
the nanocomposite film comprises at least one of polyvinylidene fluoride (PVDF) and lead zirconate titanate (PZT).

9. The personal transportation system according to claim 1 , further comprising high impedance circuitry to be receptive of a charge from the pressure sensitive mat.

10. The personal transportation system according to claim 1 , wherein the pressure sensitive mat comprises energy harvesting circuitry.

11. A hands-free call system of a personal transportation system, comprising:
a body comprising an elevator car configured to transport an individual from a first location to a second location;
an entryway located at the first location and comprising a pressure sensitive mat configured to detect a presence of the individual, which is readable as a call;
a control system configured to control operations of the body responsive to the call based on a reading of the pressure sensitive mat; and
at least one of a wall mounted call mechanism and an optical call mechanism,
wherein:
the pressure sensitive mat comprises ascend and descend sections,
weight, time and noise characteristics of the reading of the pressure sensitive mat are analyzed and interpreted by the control system as the call, and
the control system interprets pressure of a predefined magnitude and time on the ascend and descend sections as ascend and descend calls, respectively.

12. The hands-free call system according to claim 11 , wherein the pressure sensitive mat comprises:
a laminated, rubbery layer; and
a pressure sensitive thin film embedded underneath the laminated, rubbery layer,
the pressure sensitive film comprising at least one of polyvinylidene fluoride (PVDF) and lead zirconate titanate (PZT).

13. The hands-free call system according to claim 11 , wherein the pressure sensitive mat comprises:
a nanocomposite film;
a first conductive foil;
an oxide layer interposed between a first side of the nanocomposite film and the first conductive foil;
a second conductive foil; and
a nanotube film interposed between a second side of the nanocomposite film, which is opposite the first side, and the second conductive foil, wherein the nanocomposite film comprises at least one of polyvinylidene fluoride (PVDF) and lead zirconate titanate (PZT).

14. The hands-free call system according to claim 11 , further comprising high impedance circuitry to be receptive of a charge from the pressure sensitive mat.

15. The hands-free call system according to claim 11 , wherein the pressure sensitive mat comprises energy harvesting circuitry.

16. A hands-free call system of a personal transportation system, comprising:
a body comprising an elevator car configured to transport an individual from a first location to a second location;
an entryway located at the first location and comprising a pressure sensitive mat configured to detect a presence of the individual, which is readable as a call;
a control system configured to control operations of the body responsive to the call based on a reading of the pressure sensitive mat; and
at least one of a wall mounted call mechanism and an optical call mechanism,
wherein weight, time and noise characteristics of the reading of the pressure sensitive mat are analyzed and interpreted by the control system as the call and the pressure sensitive mat comprises a visible progress indicator.

17. The hands-free call system according to claim 16 , wherein the control system controls the visible progress indicator to indicate a remaining period of time required for pressure to be applied to the pressure sensitive mat to initiate the call.

Assignees

• Otis Elevator Co

Inventors

• Sun Fanping
• Mantese Joseph V
• Schmidt Walter Thomas
• Manes Enrico
• Djuknic Goran
• Braunwart Paul R
• Schmidt Wayde R

Classifications

• G01V8/10

  Detecting, e.g. by using light barriers (by reflection from the object G01S17/00) · CPC title

• G01L1/16

  using properties of piezoelectric devices · CPC title

• E05Y2400/858

  by body parts, e.g. by feet · CPC title

• E05Y2900/104

  for elevators · CPC title

• B66B5/0012

  Devices monitoring the users of the elevator system · CPC title