EP4228987A1 - Escalier à marches instrumentées à actionneur de levage pour l'assistance à la montée ou à la descente - Google Patents
Escalier à marches instrumentées à actionneur de levage pour l'assistance à la montée ou à la descenteInfo
- Publication number
- EP4228987A1 EP4228987A1 EP21777467.8A EP21777467A EP4228987A1 EP 4228987 A1 EP4228987 A1 EP 4228987A1 EP 21777467 A EP21777467 A EP 21777467A EP 4228987 A1 EP4228987 A1 EP 4228987A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- user
- center
- sensor
- assistance system
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/104—Treads
- E04F11/1041—Treads having means to adjust the height, the depth and/or the slope of the stair steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
- B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
- B66B1/30—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3476—Load weighing or car passenger counting devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0012—Devices monitoring the users of the elevator system
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
- B66B9/06—Kinds or types of lifts in, or associated with, buildings or other structures inclined, e.g. serving blast furnaces
- B66B9/08—Kinds or types of lifts in, or associated with, buildings or other structures inclined, e.g. serving blast furnaces associated with stairways, e.g. for transporting disabled persons
- B66B9/0869—Collapsible stairways, e.g. operable between a lower level and an upper level
Definitions
- the present invention relates to the field of stair systems with steps for assisting the movement of individuals.
- the present invention aims mainly to improve the instrumented and motorized staircases according to the state of the art, in particular in order to assist a user (having pathologies or not) to move from one floor to another with the taking into account the characteristics of his gait and his balance.
- escalators For assistance in moving from one floor to another, in addition to elevators, we know escalators, also called escalators or escalators.
- An escalator is a conveyor-elevator suitable for transporting people, consisting of a staircase whose moving steps are mechanically driven while remaining permanently in a horizontal plane.
- Escalators are heavy and expensive installations, and are systematically implemented in places where the difference in height is already substantial.
- Patents KR101023523B1 and KR100937044B1 disclose stair systems with independent motorized, instrumented and motorized steps whose purpose is to facilitate the ascent or descent of persons with reduced mobility (disabled persons, children, etc.).
- Each of the steps of the staircases described comprises a presence detector by measuring the weight as well as an actuator making it possible to raise or lower the step considered at the level of the adjacent step.
- the disclosed systems do not detect the characteristic of the user's step, nor take into account the potential imbalance caused when raising the steps. In particular, the systems do not adapt to the movement speed of the user (whether valid or not).
- a system according to these patents can therefore be used intrinsically by an able-bodied person but does not adapt to its own characteristics. There is a need to further improve stair systems with assistance steps, more particularly so that they best adapt to any user, able-bodied or not, in particular if the latter changes his gait during his move.
- the general object of the invention is then to meet this need at least in part.
- the invention firstly relates to an ascent or descent assistance system, comprising:
- a staircase comprising at least one instrumented mobile step, equipped with at least one sensor for measuring the center of pressure of a user and with at least one lifting actuator suitable for raising or lowering the step according to a degree of freedom at the vertical;
- a calculation unit connected to the sensor for measuring the center of pressure and to the lifting actuator, the calculation unit being configured to calculate at least the position, the speed of movement and the acceleration of the user from of the center of pressure measured by the sensor and, based on the calculated values, controlling the lifting actuator.
- center of pressure is meant here and in the context of the invention, the dynamic point characteristic of the contact between the surface of a step of the staircase and a foot of the user.
- the staircase can comprise a plurality of instrumented mobile steps, adjacent to each other, the calculation unit being configured to control each lifting actuator independently of the others.
- the system further comprises at least two fixed steps each instrumented with at least one sensor for measuring the center of pressure of the user, one and the other of the two fixed steps respectively defining the upper and lower floor between which the staircase is arranged.
- the senor for measuring the center of pressure is a so-called 6-axis force sensor, suitable for force measurements on 6 axes (Fx, Fy, Fz, Mx, My, Mz).
- a 6-axis sensor allows the measurement of a complete force torque, namely the three force components (Fx, Fy, Fz) and the three moment components (Mx, My, Mz) exerted by a user's foot on an instrumented step according to the invention.
- the system further comprises at least one sensor for measuring the center of mass connected to the calculation unit, the latter being further configured to compare the measurement of the center of mass of the user with that from the center of pressure, deduce whether the user is unbalanced or not and, based on this comparison, control the lifting actuator.
- center of mass is meant here and in the context of the invention, the geometric point corresponding to the average value of the mass distribution of a user in space.
- the sensor for measuring the center of mass is arranged close to the staircase.
- it can be carried out in an alternative way by embedding sensors on the user or equipment used by the latter.
- the senor for measuring the center of mass is preferably one or more cameras or stereoscopic devices.
- a first solution can thus consist in arranging specific markers on different parts of the user's body in order to define precise points of a "digital skeleton". From the position of these points which is extracted from the video streams of the stereoscopic cameras, it is possible to estimate the distribution of the masses of the user's limbs and therefore to estimate the Center of Mass.
- a second solution consists in arranging inertial units on characteristic points of the user, coupled with a “digital skeleton”.
- the element measured by these inertial units is the position of each limb by integration in two times of the acceleration measurements.
- the calculation unit integrates a learning algorithm adapted to acquire the characteristics of the gait of a given user from the measurements of the center of pressure sensor, and if necessary of the sensor of center of mass measurement, recognize it and adapt the control of each lifting actuator according to the recognition carried out.
- the invention essentially relates to a system comprising a staircase with instrumented step(s) for measuring the center of pressure and preferably the center of mass of a user whose information is centralized within a unit computer, which, from the measurement signals, controls the lifting actuators present on each step of the staircase on the basis of its on-board algorithm. Taking into account the derivatives of the position of the center of pressure makes it possible to ensure the adaptation of the elevation speed of the steps to adapt to the user, in particular if the latter modifies his gait during the movement.
- each actuator is carried out according to the position of the user in the staircase, his speed of movement deduced from the center of pressure measured and preferably the potential imbalance using the center of mass measurement.
- the very precise control of the lifting actuators makes it possible either to help people with reduced mobility to take the stairs or to ensure a feeling of walking on a floor. without height difference for able-bodied people without imbalance.
- the height at which a user must raise his legs to go from a lower floor to an upper floor is greatly reduced, typically between 0 and 25 cm, while ensuring the walking speed, typically between 0 and 2 m/s along the horizontal, of the user.
- the invention also relates to the use of the assistance system described previously, to detect a user fall and in response to the detection, to transmit an alert message to a remote server connected to the system.
- the calculation unit is advantageously adapted for the analysis of the trajectories of the Center of Pressure and the detection of a double prolonged support on two distinct steps or on a single step, that is that is to say a press whose duration is greater than a predefined duration.
- the invention also relates to the use of the assistance system described previously, to detect a unipodal phase followed by a bipodal phase, corresponding to a potential fall of a user by stumbling and in response to the detection, to freeze the steps of the stairs or at the very least reduce their lifting speed.
- the invention also relates to the use of the assistance system described above, to detect the degradation of a user's approach.
- Figure 1 is a block diagram of an instrumented staircase system according to the invention.
- Figure 2 is a schematic view of an example of an instrumented staircase with a lifting actuator according to the invention.
- FIG 3 is a schematic perspective view of an exemplary embodiment of an instrumented step according to the invention integrating ôaxes force sensor and an electric cylinder as a lifting actuator.
- Figure 4A is a schematic view illustrating a first step in the ascent of a user between two adjacent instrumented steps assisted by a system according to the invention.
- Figure 4B is a schematic view illustrating the second step in the ascent of a user between two adjacent instrumented steps assisted by a system according to the invention.
- Figure 4C is a schematic view illustrating the third step in the ascent of a user between two adjacent instrumented steps assisted by a system according to the invention.
- Figure 4D is a schematic view illustrating the fourth step in the ascent of a user between two adjacent instrumented steps assisted by a system according to the invention.
- Figure 5A is a schematic view illustrating a first step in the descent of a user between two adjacent instrumented steps assisted by a system according to the invention.
- Figure 5B is a schematic view illustrating the second step in the descent of a user between two adjacent instrumented steps assisted by a system according to the invention.
- Figure 5C is a schematic view illustrating the third step in the descent of a user between two adjacent instrumented steps assisted by a system according to the invention.
- Figure 5D is a schematic view illustrating the fourth step in the descent of a user between two adjacent instrumented steps assisted by a system according to the invention.
- FIG 6 is a schematic view illustrating a first situation in which a user risks falling by tripping following a collision with an obstacle, the system according to the invention being adapted to detect and respond to this first situation.
- Figure 7 is a schematic view illustrating a second situation in which a user risks falling by tripping following a collision with an obstacle, the system according to the invention being adapted to detect and respond to this second situation.
- Figure 1 There is illustrated in Figure 1, the block diagram of an assistance system 1 for ascent or descent according to the invention.
- System 1 firstly comprises a staircase 10 with steps each moving between an extreme low position and an extreme high position. The movement of each step is ensured by a lifting actuator integrated into the step as detailed below.
- the system also comprises instrumentation 20 adapted to measure the position of the user's center of pressure and all its derivatives, on each step of the staircase and instrumentation 30 adapted to measure the user's center of mass (and all its derivatives).
- a calculation unit 40 will adapt the control of each stair lifting actuator according to the position of the user on the stairs, his speed of movement deduced from the center of pressure measured and the potential imbalance using center of mass measurement.
- the calculation unit 40 can also ensure during the presence of a user in the staircase 10 that he has a good balance with respect to a history of data and/or a preconstituted database.
- the algorithm embedded by the computing unit 40 can thus verify that the center of pressure/center of mass relationship ensures the balance of the user.
- system 1 makes it possible to detect the fall of the user.
- FIG. 2 An example of a staircase 10 is represented schematically in FIG. 2.
- the staircase here consists of three instrumented steps M1, M2, M3 which are adjacent and are movably mounted along a path symbolized by dotted lines in FIG. 2, between an extreme position low and an extreme high position.
- a lifting actuator 11a for function of raising a step M1 to M3 along the vertical according to a stroke which allows it to be positioned at the same level as an adjacent step.
- each of the steps M1 to M3 is equipped with a 6-axis force sensor, referenced 20, making it possible to trace the position of the center of pressure of a user on each step, as detailed below.
- the tread of the steps M1 to M3 is between 20 and 30cm.
- the steps upstream Mi and downstream Ms of staircase 10 which respectively define the lower floor and the upper floor are fixed but also each instrumented by means of a 6-axis force sensor. These two steps Mi, Ms have the function of measuring the gait of the user, in order to predict his movement either on the ascent or on the descent in the staircase 10.
- the measurement sensors 20, 30 record the characteristics of the center of pressure and of mass, for example the positions, speeds, history, accelerations in space, in order to initiate the movement piloted from steps M1 to M3.
- FIG. 3 An example of an instrumented and motorized step M1 in accordance with the invention is illustrated in FIG. 3.
- the lifting actuator here is an electric jack 11 arranged with its support 12 between a base 13 and an interface plate 14.
- the jack 11 and its support 12 are fixed to the base 13 and the rod of the jack 11 is fixed to the connecting plate 14 which ensures the vertical movement of the step.
- the 6-axis force sensor 20 is arranged between an interface plate 15 with the user and the connecting plate 14.
- an electric actuator 11 can have a maximum vertical displacement speed of Im/s for a load of 100 kg.
- the sensor 20 makes it possible to measure the forces along the X, Y, Z axes and the moments around each of these axes.
- the deformations considered along each of these axes are also symbolized respectively Ix, ly, Iz.
- a step M1 to M3 is considered rigid, that is to say it undergoes negligible deformation under stress, ie constant Iz.
- the sum of the torsors on a given step Ml, M2 or M3 can be written, according to the fundamental principle of the dynamics applied to a step:
- ⁇ T Weight /walk ⁇ G walk : Static torsor of the weight on the walk at point Gwalk
- ⁇ T Ext /walk ⁇ M: Static torsor of the user's efforts on the walk at point M
- ⁇ T sensor / walking ⁇ P: Static torsor of the efforts of the sensor on the walking at point P.
- the different torsors are written with mmarche the mass of the step and the points Gmarche and P aligned along the vertical axis y. or the translation of the step along f vertical axis y.
- the acquisition module of the calculation unit 40 makes the history of this measurement of Ix and ly.
- the calculation unit 40 can thus record the distance traveled, by integrating the movement signal, determine the speed of movement (1 st derivative), determine the acceleration of movement (2 nd derivative).
- a camera or a stereoscopic device is arranged and can thus estimate the position of the user's center of mass.
- Figures 4A to 4D illustrate the operation of a system 1 according to the invention in the case of a stair climb 10 by a user.
- the presence of the user is initially detected on a lower step M1 (FIG. 4A).
- FIG. 4D illustrate the operation of a system 1 according to the invention in the case of a descent of stairs 10 by a user.
- the presence of the user is initially detected on an upper step M3 (FIG. 5A).
- This detection can be done from the recognition of two strategies of resumption of balance, which is characterized by protective steps of the user.
- the second strategy is called “low”. During the collision between the take-off foot and the obstacle, the user brings their take-off foot back to the ground, in order to find a bipodal stance phase.
- the system can freeze the mechanism, that is to say not generate lifting of the stair treads, so as not to disturb the user or to decrease sharply , for example with a factor of 10, the movement speeds of the stair treads.
- the invention is not limited to the examples which have just been described; it is in particular possible to combine together characteristics of the examples illustrated within variants not illustrated.
- the staircase 10 comprises three instrumented and motorized steps by means of a lifting actuator, any number of steps can be envisaged from a single instrumented and motorized step.
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Transportation (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Steps, Ramps, And Handrails (AREA)
- Manipulator (AREA)
- Rehabilitation Tools (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2010599A FR3115277B1 (fr) | 2020-10-16 | 2020-10-16 | Escalier à marches instrumentées à actionneur de levage pour l’assistance à la montée ou à la descente. |
| PCT/EP2021/074999 WO2022078680A1 (fr) | 2020-10-16 | 2021-09-10 | Escalier à marches instrumentées à actionneur de levage pour l'assistance à la montée ou à la descente |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4228987A1 true EP4228987A1 (fr) | 2023-08-23 |
| EP4228987B1 EP4228987B1 (fr) | 2025-06-11 |
Family
ID=73793464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21777467.8A Active EP4228987B1 (fr) | 2020-10-16 | 2021-09-10 | Escalier à marches instrumentées à actionneur de levage pour l'assistance à la montée ou à la descente |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12523043B2 (fr) |
| EP (1) | EP4228987B1 (fr) |
| JP (1) | JP7725579B2 (fr) |
| FR (1) | FR3115277B1 (fr) |
| WO (1) | WO2022078680A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7620359B1 (ja) | 2024-05-14 | 2025-01-23 | オーグメンテッドコミュニケーションズ株式会社 | 構造体移動装置 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5802773A (en) * | 1994-11-30 | 1998-09-08 | Pingel; Nathan W. | Handicap accessible stair |
| JP2984237B2 (ja) * | 1997-06-20 | 1999-11-29 | 日本フィレスタ株式会社 | 階段用昇降装置 |
| US20080169158A1 (en) * | 2007-01-16 | 2008-07-17 | Hong Lam | Twin Screw Scissor Lift Assembly |
| CA2661101C (fr) * | 2009-04-03 | 2010-02-23 | A.H. Vanderburgh | Ascenseur d'escalier |
| KR100937044B1 (ko) | 2009-10-22 | 2010-01-15 | (주)알파오메가종합건축사사무소 | 환자나 장애인 또는 유아를 위한 건축 안전 계단장치 |
| KR101023523B1 (ko) | 2010-10-20 | 2011-03-21 | (주)디에이그룹엔지니어링종합건축사사무소 | 장애인 및 유아를 위한 건축용 계단 장치 |
| ES2413905B1 (es) * | 2011-12-30 | 2014-08-14 | Antonio RIBAS PAÑELLA | Procedimiento para transportar personas salvando un desnivel con pendiente, y dispositivo correspondiente |
| DE202014006021U1 (de) * | 2014-07-25 | 2015-02-19 | Benjamin Overhoff | Intelligente Treppe |
| CN105565113B (zh) * | 2016-02-22 | 2017-10-20 | 河南广度超硬材料有限公司 | 平步楼梯 |
| US10975574B2 (en) * | 2017-05-26 | 2021-04-13 | Georgia Tech Research Corporation | Energy-efficient assistive stairs |
| US20210061617A1 (en) * | 2019-09-04 | 2021-03-04 | Evermore Systems Inc. | Systems and Methods of Providing Vertically Adjustable Steps |
| US20220063960A1 (en) * | 2020-09-03 | 2022-03-03 | Evermore Systems Inc. | Control Systems and Methods to Provide Sensor-Based Control |
| US12030746B2 (en) * | 2022-02-16 | 2024-07-09 | Ricky Shum | Stair assistance device and system |
-
2020
- 2020-10-16 FR FR2010599A patent/FR3115277B1/fr active Active
-
2021
- 2021-09-10 WO PCT/EP2021/074999 patent/WO2022078680A1/fr not_active Ceased
- 2021-09-10 US US18/248,759 patent/US12523043B2/en active Active
- 2021-09-10 JP JP2023523160A patent/JP7725579B2/ja active Active
- 2021-09-10 EP EP21777467.8A patent/EP4228987B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2023546889A (ja) | 2023-11-08 |
| FR3115277A1 (fr) | 2022-04-22 |
| US12523043B2 (en) | 2026-01-13 |
| FR3115277B1 (fr) | 2023-01-20 |
| WO2022078680A1 (fr) | 2022-04-21 |
| EP4228987B1 (fr) | 2025-06-11 |
| US20230399852A1 (en) | 2023-12-14 |
| JP7725579B2 (ja) | 2025-08-25 |
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