WO2016110497A1

WO2016110497A1 - System for monitoring the gripping of a railing of a stairway

Info

Publication number: WO2016110497A1
Application number: PCT/EP2016/050106
Authority: WO
Inventors: Didier LARRAURI
Original assignee: Electricite De France
Priority date: 2015-01-06
Filing date: 2016-01-06
Publication date: 2016-07-14
Also published as: FR3031412A1; FR3031412B1

Abstract

The invention relates to a system (1) for monitoring the gripping of a railing of a stairway, including: a stairway (10); at least one railing (11); at least one sensor (20) for detecting the gripping of the railing by a person; and a processor (32) connected to the railing-gripping sensor, and suitable for processing signals emitted by said sensor and for generating an alarm on the basis of said signals. The invention is characterised in that it further includes at least one sensor (21) connected to the processor (32), said sensor being suitable for detecting that a person has passed through the stairway, and in that the processor is designed to generate an alarm if said passing-detection sensor detects that a person has passed through and the railing-gripping-detection sensor does not detect gripping of the railing.

Description

SYSTEM FOR MONITORING THE HOLD OF A RAMP OF A

STAIRCASE

FIELD OF THE INVENTION

The invention relates to a system for monitoring the hold of a ramp of a staircase, and a monitoring method implemented by the system.

STATE OF THE ART

A walk-through event is an event that causes an imbalance of an individual, and occurs on a flat surface or with reduced level breaks such as stairs or sidewalks. The event may be slip, stumble, stumbling, and result in varying consequences depending on its conclusion: restoring balance, falling, etc.

A significant proportion of accidents at work, estimated at about a quarter, are single-storey accidents.

As a result of these accidents, in addition to risks to the health of individuals, work stoppages induce a loss of productivity for the employer of the persons concerned.

Ground-level accidents, although having dramatic consequences, are often considered trivial and are trivialized.

In-house staff often pay too little attention and the fact that this risk is considered common or commonplace makes prevention difficult. Few measures are currently deployed to effectively prevent this type of accident.

Among the accidents on the level are those caused by a fall or loss of balance in a staircase. For these, we know in some companies security policies to remind the main safety rules to follow when you cross a staircase. These rules are:

- Hold the ramp,

- Pay attention and do not call,

- Carry your documents or laptop in a bag to have hands free, especially to hold the ramp,

- Do not run or move in a hurry.

We note that holding the ramp is the first prevention measure. This makes it possible to reduce the risk of falling or imbalance, to restore its equilibrium more easily, and to reduce the severity of the consequences of an accident.

However, no reliable system today makes it possible to ensure that this preventive measure is well respected.

In particular, document US Pat. No. 8,534,445 discloses a system for detecting the holding of a stair rail, comprising one or more contact sensors, of the force sensor type, arranged along the stair rail.

These sensors are used to detect and analyze the nature of the contact with the ramp, including a history of use of the ramp. The objective is to monitor the physical or physiological capabilities of ramp users.

However, these sensors only provide information on the use of the stairs when an individual holds the ramp, and they do not allow to detect the presence of an individual on the stairs not holding the ramp, making it impossible to prevent falls.

PRESENTATION OF THE INVENTION

The invention aims to overcome the disadvantages of the prior art, by providing a monitoring system of the holding of a ramp of a staircase to reduce the risk of falling.

In particular, an object of the invention is to be able to detect the presence in the staircase of an individual not holding the banister.

Another object of the invention is to make it possible to check the conditions of use of a staircase, in terms of, for example, attendance, upward and downward flow, studies of users' practices with regard to holding the ramp, speed of movement, etc. In this respect, the subject of the invention is a system for monitoring the holding of a ramp of a staircase, comprising:

- a stair

- at least one stair rail

at least one sensor adapted to detect the holding of the ramp by an individual, and

a processor connected to the ramp-holding sensor and adapted to process signals emitted by the ramp-holding sensor and to generate an alert according to said signals,

the monitoring system being characterized in that it further comprises at least one sensor connected to the processor, said sensor being adapted to detect a passage of an individual,

and in that the processor is configured to generate an alert if the pass detection sensor detects the passage of an individual and the ramp hold detection sensor detects no ramp hold.

Advantageously, but optionally, the monitoring system according to the invention may further comprise at least one of the following characteristics:

the system comprises at least one passage detection sensor at each end of the staircase.

The system comprises, at each end of the staircase, a group of passage detection sensors comprising at least two sensors spaced from one another, the processor being connected to said sensors and configured to determine, from signals communicated by the sensors of each group, a sense of crossing a staircase by a person and a speed of movement of the person.

Each passage detection sensor is of the photoelectric sensor type comprising a light beam emitter and a photoelectric cell arranged facing each other.

Each group of passage detection sensors comprises three sensors, and wherein:

o two sensors are arranged so that the direction of their radius light is orthogonal to the direction of the staircase, and

a sensor disposed between the two other sensors is arranged so that its light ray is intersecting with that of one of the other two sensors,

and the processor is configured to detect, from the signals communicated by the sensors, the presence of two people side by side.

- The sensors of the same group are spaced a distance of between 10 cm and 1 m, preferably between 30 cm and 0.7 m, and preferably equal to 0.5 m.

Each passage detection sensor is positioned at a height of between 0.5 m and 1.2 m, preferably equal to 1 m.

- The ramp hold sensor is a contact or proximity sensor selected from the following group:

o pressure sensor,

o thermosensitive sensor,

o photoelectric sensor,

o tactile film covering a portion of the ramp,

o impedance measurement sensor,

o video camera.

- The system includes several ramp-holding sensors located at several locations on the ramp.

- The system further comprises a light alerter adapted to emit a light alert signal and / or a sound alerter controlled by the processor, the light alert signal comprising an indicator light or an information display screen.

The invention also relates to a method of monitoring the holding of a ramp of a staircase, implemented by a system comprising:

- a stair

- at least one stair rail

a processor connected to the ramp-holding sensor, and adapted for processing signals transmitted by the ramp-holding sensor and generating an alert based on said signals,

at least one sensor disposed at one end of the staircase and connected to the processor, said sensor being adapted to detect a passage of an individual,

the method comprising, upon detection of a pass by a pass detection sensor, the implementation by the processor of the steps of:

- interrogate each ramp-holding sensor, and

- if no boom hold sensor detects ramp hold, generate an alert.

Advantageously, but optionally, the monitoring method according to the preceding description being implemented by a system comprising two ramps extending on either side of the staircase, at least one ramp-holding sensor for each ramp, and wherein each group of passage detection sensors comprises three photoelectric sensor type sensors comprising a light beam emitter and a photoelectric cell arranged facing each other, and wherein:

two sensors are arranged so that the direction of their light rays is orthogonal to the direction of the staircase, and

a sensor disposed between the two other sensors is arranged so that its light beam is intersecting with that of one of the other two sensors,

and the processor being configured to detect, from the signals communicated by the sensors, the presence of two people side by side, the method comprises the implementation, by the processor, of the steps of:

- from signals acquired by the passage sensors, to detect the presence of two people side by side on the stairs,

- interrogate the ramp-holding sensors of each ramp, and

- for a ramp, if no ramp-holding sensor detects holding of the ramp, generate an alert. The invention finally relates to a computer program product, comprising code instructions for implementing the method according to the preceding description when it is executed by a processor.

The monitoring system according to the invention makes it possible to detect the presence in a staircase of an individual by means of crossing sensors (presence detection). The signals from these sensors, signaling the presence of an individual in a staircase, can be coupled to signals from ramp-holding sensors, to verify that the detected individual holds the ramp.

In addition, the monitoring system, by generating an alert in case of individual not holding the ramp, ensures fall prevention.

The surveillance system can respect the anonymity of the users of the staircase when the sensors are not of the video sensor type.

According to one embodiment, the proposed monitoring system is able to process a flow of people comprising two people side by side in a staircase, and to check that these people hold ramps located on either side of the staircase, for a more complete reliability.

DESCRIPTION OF THE FIGURES

Other features, objects and advantages of the present invention will appear on reading the detailed description which follows, with reference to the appended figures, given by way of non-limiting examples and in which:

FIG. 1 represents a system for monitoring the holding of a ramp of a staircase according to one embodiment of the invention,

FIG. 2 represents an arrangement of passage detection sensors according to one embodiment of the invention,

- Figure 3 shows the main steps of a method of monitoring the holding of a staircase ramp and alert according to one embodiment of the invention. DETAILED DESCRIPTION OF AT LEAST ONE EMBODIMENT OF THE INVENTION

Monitoring system for the maintenance of a ramp of a staircase

Referring to Figure 1, there is shown a monitoring system 1 of the holding of a ramp of a staircase.

This system comprises a staircase 10, which may comprise one or more sections separated by bearings, and one or two ramps 1 1 disposed (s) on the (s) side (s) of the staircase. The staircase 10 can be arranged indoors or outdoors.

The system also includes sensors to monitor the passage of people on the stairs and to verify that these people, during their passage, hold the banister of the stairs. In the case where the staircase 10 is outside, the sensors described below are advantageously protected against the weather.

All the sensors are advantageously powered by a low voltage power supply, and advantageously include a battery (not shown), allowing an emergency power supply in case of power failure, and therefore to continue the monitoring of the ramp.

In this regard, the system 1 comprises a first type of sensor 20 adapted to detect the holding of the ramp by a person. This sensor is in the following called "ramp hold sensor".

The ramp-holding sensors 20 may be the subject of various variants.

On the one hand, it may be contact sensors, that is to say, detecting a holding of the ramp by an individual by means of a contact, for example by the hand of the individual.

Such sensors may be, for example, pressure sensors disposed on an upper surface of the ramp, where appropriate of the textile type (that is to say a sensor capable of measuring a pressure exerted on a network of woven textile fibers or knitted), or piezoelectric type, a touch film covering one or more segments of the ramp, impedance-measuring sensor (i.e., a sensor capable of measuring the impedance of the ramp, or, in case contact of the ramp, the assembly comprising the ramp and the hand of the individual, the impedance own hand modifying the impedance of this set), etc., covering one or more sections of the ramp.

Alternatively, the ramp-holding sensors 20 may be non-contact sensors detecting a presence at a very short range, for example less than 5 cm. Even if it is preferable for a person to hold the ramp, the fact that they hold their hand at a very short distance from the ramp greatly facilitates grasping the ramp in case of imbalance, and also reduces risks. of fall,

The non-contact sensors applicable for ramp hold detection are:

thermosensitive sensor (detection of presence near the ramp related to a local rise in temperature), for example by detecting infra-red radiation generated by a person or his hand at a very short distance from the ramp,

- Photoelectric sensor, comprising a light beam emitter parallel to the ramp and a receiver vis-à-vis the end of the boom section (the beam emitted by the source is parallel to the ramp and located 1 or 2 cm The beam is cut off when a user of the stair catches the ramp).

- Video sensor, this type of sensor is however less privileged because it does not guarantee the anonymity of people using the stairs. According to a first embodiment, the sensors 20 are preferably arranged at the same level as the sensors 21 described below, that is to say at least at the ends of a staircase or a section of stairs, and preferably with at least one intermediate sensor between the ends. In this case, a sensor 20 and one or more sensors 21 arranged at the same level with respect to a stair step can form a self-contained detection module operating together to provide ramp-hold monitoring, as hereinafter described with reference in Figure 3.

Alternatively, in the case where the sensors are surface sensors, as is the case for example of tactile film, textile sensor, the ramp is advantageously completely covered with a sensor 20, as it is represented on the left ramp, that is to say the one shown at the top (in relation to a person climbing the stairs) of Figure 1.

Alternatively, these sensors may extend over one or more sections of the ramp. In the case where the sensors are more specific (for example pressure sensors), the ramp preferably comprises several, advantageously distributed at regular intervals over its entire length, for example by being spaced apart from 5 to 50 cm, preferably from 10 to 30 cm.

A second type of sensor 21 is adapted to detect a person engaging in the staircase. These sensors are subsequently called "pass detection sensors".

Pass detection sensors 21 are non-contact sensors, for example of the types mentioned above. However, for more precise detection of the passage, the sensors 21 are advantageously of the photoelectric sensor type, comprising, as can be seen in FIG. 2, a light beam emitter 210, for example in the infrared band. red, and a receiver 21 1 provided with a photocell arranged opposite the transmitter. In this way, the cell continuously detects the beam emitted by the transmitter, except when this beam is cut, which is the case when a person P passes. Then the cell detects the passage of a person.

Advantageously, the ramp-holding detection system 1 comprises at least one passage detection sensor 21 at each end of the staircase. In the case where the staircase comprises a plurality of sections separated by bearings, the system advantageously comprises a sensor 21 at each end of each section.

Alternatively, a single passage detection sensor 21 can be positioned in the middle of the staircase.

Each sensor 21 is then positioned on the side of the staircase as in FIG. 2, and:

- slightly upstream of a first step relative to the direction of travel (in the upward direction as in the descent direction), for example at a distance from the ground (measured horizontally) of less than 50 cm from the step , and preferably less than 30 cm, this is the case of the sensor 21 A in FIG.

- either at the plumb, that is to say at the level, of one of the first steps (in the direction of the rise or that of the descent), preferably of the first. This is the case of the sensors 21B in FIG.

In addition, the system may also include intermediate passage detection sensors 21 disposed between the end sensors, which allows a person's position in a staircase to be roughly followed.

As can be seen in FIG. 1, each sensor is advantageously positioned at a height h (distance from the ground or at the step, when the sensor is at the base of a step) guaranteeing the detection of a person during his passage. This height is greater than 15 cm and less than 180 cm.

Preferably, each sensor is disposed at a height of between 0.5 m and 1.2 m, preferably equal to 1 m, which corresponds approximately to a pool height of individuals.

In the case of photoelectric sensors, the emitters can be housed in a wall along the staircase, for example on which is fixed the ramp, and the receiver cells on an opposite wall. Alternatively, the transmitters or receivers may be on a ramp, or both if the staircase is bordered by two ramps.

According to a preferred embodiment of the invention, the passage detection sensors 21 are grouped into sets 22 of sensors 21, the sets advantageously comprising two or even three sensors.

In this case, instead of having a single sensor at each end of a staircase or staircase section, the system has two or three of them grouped so as to work together as described below.

The sensors 21 of the same set are preferably spaced apart from a ground distance of between 10 cm and 1 m, preferably between 30 cm and 0.7 m, and preferably equal to 0.5 m. Advantageously, two or three sensors 21 of the same set are respectively in line with two or three successive steps.

According to a nonlimiting example, an assembly 22 of three sensors 21 disposed at the end of a staircase may therefore comprise: a sensor 21 arranged upstream of the first step (in the direction of descent or ascent) at a distance of the order of 20 or 30 cm,

a sensor disposed vertically above the first step, above the latter, and

- A sensor positioned above the second step, above it.

The fact of having at least two sensors 21 and 21 'slightly spaced in the same area of the staircase can detect, in addition to the presence of an individual, its direction of movement and its speed.

In this case, the two sensors 21 and 21 'are preferably photoelectric sensors arranged in a direction orthogonal to the direction of the staircase, that is to say that the light rays emitted by the emitters 210 and 210' of each sensor respectively are orthogonal to this direction.

According to an embodiment of the alternative or cumulative invention, a set 22 of sensors 21 may comprise at least one photoelectric sensor disposed orthogonally to the direction of the stair (that is to say, whose light beam is oriented orthogonally to this direction), and another 21 "oriented at an angle to the first, that is to say so that the light beam emitted by its emitter 210" is secant with that of the first.

By "secant" is meant nonparallel, that is to say that it is not necessary that the light rays are effectively secant, because they are not at the same height, or, even if the light rays are brought back in a common plane, it is not necessary that they are intersecting in the zone which separates the emitters 210 from the receivers 21 1, that is to say, if the staircase is bordered by two ramps bearing respectively transmitters and receivers, in the area between the two ramps. Their (theoretical) crossing point can be beyond the receivers. It is therefore sufficient that the light rays are oriented relative to each other by a non-zero angle (and not a multiple of 180 °).

Preferably, the two sensors are oriented so that their light rays form between them an angle of between 10 and 80 °, advantageously between 30 and 60 °.

The angled beam can detect two people crossing the stairs side by side, which does not detect a sensor oriented orthogonally to the direction of the staircase. This embodiment is particularly advantageous in the case where the system 1 comprises two ramps 1 1, 1 1 'disposed on either side of the staircase 10, because, as described below, it allows to monitor the holding two ramps by people crossing the front stairs.

Preferably, and as represented in FIG. 2, the advantages of the embodiments described above are combined by providing groups 22 of three photoelectric sensors 21, two of which sensors 21, 21 'of the assembly are arranged in a direction orthogonal to the direction of the staircase, and a third sensor 21 ", preferably disposed between the first two, is oriented to have a secant beam with one of the other two sensors 21, 21 '.

This embodiment makes it possible to access both the direction and the speed of crossing of the sensors (thanks to orthogonally oriented sensors), and to the detection of two individuals ascending or descending the front staircase (thanks to the sensor having an angled beam).

The nature and arrangement of the sensors are advantageously chosen to facilitate maintenance and cleaning of the stairwell and the ramp. For example, in the case of surface sensors, these are preferably compatible with commonly used cleaning products. The sensors are also preferably deactivatable during the household.

Returning to Figure 1, the system 1 further comprises a central unit 30 connected to the sensors 20, 21, either by wire means (Ethernet cable, etc.) or by wireless communication, for example by Wi-Fi, Bluetooth, etc. In this respect it comprises a communication module 31 with the sensors, adapted to make the connection with the sensors. Wireless communication makes sensor and unit installation simpler and faster. The central unit can then be at a distance from the staircase, for example in another building. It can therefore be used to process the information of all the stairs of a building or a group of buildings. Advantageously, if the staircase 10 and the sensors are outside, the unit 30 is at a distance in a building to be protected against the elements.

The central unit comprises a processor 32 connected to the communication module 31 by a connector, for example a bus or a cable, by example of Ethernet type.

The processor is configured to receive the data or signals from all or some of the sensors (the system can then include several units to gather information from all the sensors) and process this data to determine whether one or more people are to cross the stairs, if the (or) ramp is well held by each person detected, and if not, issue an alert.

It is also configured to implement a system of self-testing sensors and alerters, to periodically check their proper operation.

These functionalities are, in a particular embodiment, grouped together within a software application that can be installed and uninstalled on a computer comprising the connectors 31 and the processor 32 described above, allowing for example a quick and temporary installation of a surveillance system for a limited period. In this case the sensors are also temporarily positioned on the ramp or the immediate environment of the staircase to fulfill their detection function.

The system 1 further comprises a sound alerter 40, and / or light 41, this alerter 40 may be a light indicator disposed on or near the staircase or the ramp, or a display, such as a screen, on which display text messages or pictograms inviting stair users to hold the ramp or calling their attention to the danger of not doing so.

The alerters 40, 41 are controlled by the processor 32 which is configured to execute code instructions activating an alert by these alerters. In this respect, the processor is connected to the alerters by a physical connector or a wireless means (eg Bluetooth or Wi-Fi connection, etc.).

Advantageously, but optionally, the system may further comprise a memory or a database 50, possibly remote from the unit 30, which is adapted to store information on the use of one or more stairs.

This information may include, without limitation:

the raw data from the sensors 20, 21 for a determined period of time,

- statistics established by the processor 32 on the use of the staircase, knowing, number of people borrowing by day or over the period, distribution between climb and descent, average speed uphill and downhill, etc.,

- number of incidents on the stairs during the period, etc.

Data external to those directly or indirectly

(after treatment, eg speed) sensors can be entered by an operator.

Finally, the system 1 may further comprise a remote system 60 of the staircase, for example in another building, used to relay information remotely. The system 60 may be a computer system such as a computer, as in Figure 1, for transmitting the data from the sensors or processed by the processor.

In this case, it advantageously comprises a processor configured to execute a program, for example of the software application type, dedicated to the display of the results, and if necessary the parameterization of the sensors, and / or alerters.

It can also be an alerter in an emergency station, in the case in particular of a low-frequented staircase, in the event of a fall of a person, who could in the absence of such a means of alert be immobilized for a long time.

The communication with the memory 50 and / or the system 60 is advantageously implemented remotely, for example by Wi-Fi, Bluetooth, etc. In this respect, the central unit 30 may comprise an additional communication interface 33. The memory and / or system 60 includes a corresponding interface (not shown) to enable communication.

Method for monitoring the hold of a ramp of a staircase

Referring to Figure 3, there is shown the main steps of a method 100 for monitoring the holding of a ramp of a staircase. This method comprises a first step 1 10 of detection, by a first passage detection sensor 21, of the passage of an individual in the staircase.

The sensor 21 is preferably at one end of a staircase, this can detect the individual as soon as he starts to go up or down. During this step, the sensor 21 communicates to the processor 32 a signal indicative of the detection of the individual.

During a step 120, the processor 32 then interrogates the ramp-holding detection sensors 20 to determine if one of them has detected holding of the stair rail.

If no ramping behavior is detected during a step 130, then the processor generates an alert during a step 140, by sending an instruction to all or part of the alerters 40, 41 to produce an alert signal sound or visual.

Optionally, a counter of the number of passes during which the ramp has not been held may increment, or a counter of the period during which the ramp has been held at each pass may be reset to 0.

Advantageously, but optionally, the method may comprise a delay implemented either during step 120 or during step 130, so as not to trigger an immediate warning. For example, the processor 120 may wait a specified time, for example between 1 and 30 seconds, to interrogate the sensors, or may interrogate the sensors during said period of time until a ramping behavior is detected or until the end of the delay time before generating an alert.

According to a particular embodiment, in which the passage detection sensor 21 at the end of the staircase is doubled by a second sensor, the step 120 of interrogation of the ramp suits is implemented only when the two passage detection sensors have detected a passage during step 1 10.

In addition, the delay period can then be a function of the time elapsed between the detection by the two sensors, which is representative of the speed of the individual, and therefore possibly the risk of falling.

According to this embodiment, the method further comprises a step 1 1 1 of determining a direction of progression of the individual in the staircase and a speed of progression, according to the order in which the sensors have detected a passage, the distance between the sensors and respective times of detection of a passage by the two sensors. This information can be recorded by the processor, for example in the memory or database 50.

According to a particular embodiment, the method is implemented by a system according to FIG. 2 in which a group of three passage detection sensors 21 comprises a sensor oriented at an angle with respect to the others in order to detect two simultaneous passages coast to side.

In this case, the method includes interrogating 120 the ramp-holding sensors when the three sensors 21 of a group have detected a passage. The system then advantageously comprising two ramps, on either side of the staircase, this step includes interrogating the sensors of the two ramps.

Step 130 of generating an alert is then implemented if:

for at least one of the ramps, no ramp-holding sensor detects holding of the ramp, in the situation of two simultaneous passages detected,

if no sensor of all the two ramps detects ramp hold in the situation of a single detected passage.

Finally, at the end of the day, the method advantageously comprises, but optionally, a step 150 for transferring the recorded data to the memory or the database 50. An example of an algorithm implemented by the processor 32 according to the method described above.

This algorithm is implemented in the case where a staircase or section of staircase comprises a group of two or three detection sensors passing at each end, noted upstream and downstream sensors, respectively AM1, AM2 and AM3 for the upstream sensors and AV1, AV2 and AV3 for the downstream sensors. The references 1 and 2 are associated with the extreme sensors, but not with one of the two in particular, the reference 1 being associated with the first sensor detecting a passage and the reference 2 with the other. Reference 3 designates the sensor disposed between the two extreme sensors.

Daily initialization

DAY = date of the day Upstream amount flow (DAY) = 0

Upstream downstream flow (DAY) = 0

Downstream Flows (DAY) = 0

Downstream downstream (DAY) = 0

Down counter (DAY) = 0

Upstream Counter (DAY) = 0

Downstream speed = 0

Upstream speed = 0

Unkept counter (DAY) = 0

Downstream detection treatment

IF [DetecAVI] = YES

SAVE: t = tAV1

SAVE: Down Counter (DAY) = Down Counter (DAY) +1

IF [DetecAV2] = YES

SAVE: t = tAV2

IF tAV2> tAV1

SAVE: Downstream Flows (DAY) = Downstream Flows (DAY) +

1

IF tAV2 <tAV1

SAVE: Downstream downstream (DAY) = Downstream downstream (DAY) +1

SAVE: Speed downstream (downstream counter (DAY)) = e / | tAV1 - tAV2 |)

IF [DetecAVI] = YES AND IF [Detect AV2] = YES AND IF [tAV2> tAV1] AND IF [Straight Ramp Detect] = NO AND IF [Detect Left Ride] = NO for At = | tAV2-t |> 2 ^* (tAV2-tAV1)

THEN [Alarm message display] AND [Sound signal transmission] AND

Unkept Counter (DAY) = Unkept Counter (DAY) +1

Upstream detection processing

IF [DetecAM1] = YES SAVE: t = tAM1

SAVE: Upstream counter (DAY) = Upstream counter (DAY) +1 SI [DetecAM2] = YES

SAVE: t = tAM2

Sl tAM2> tAM1

REGISTER: Upstream downstream flow (DAY) = Upstream downstream flow (DAY) + 1

Sl tAM2 <tAM1

SAVE: Upstream Cash Flow (DAY) = Upstream Cash Flow (DAY)

+1

SAVE: Speed upstream (Upstream counter

(DAY)) = e / | tAM1 -tAM2 |

IF [DetecAMI] = YES AND IF [AM2 Detect] = YES AND IF [tAM2> tAM1] AND IF [Straight Ramp Detect] = NO AND IF [Left Ride Detect] = NO for At = | tAM2-t |> 2 ^* (tAM2-tAM1)

THEN [Alarm message display] AND [Sound signal transmission] AND

Unkept Counter (DAY) = Unkept Counter (DAY) +1

Embodiment with three group pass detection sensors for detecting two simultaneous side-by-side passes - example downstream

IF [DetecAV1] = YES

SAVE: t = tAV1

SAVE: Down Counter (DAY) = Down Counter (DAY) +1

CompteurAV3 = 0

IF [DetecAV3] = YES

SAVE: CounterAV3 = CounterAV3 + 1

IF [DetecAV2] = YES

SAVE: t = tAV2

IF tAV2> tAV1

SAVE: Downstream Flows (DAY) = Downstream Flows (DAY) + AV3 Counter IF tAV2 <tAV1

SAVE: Downstream Downstream Flow (DAY) = Downstream Downstream Flow (DAY) + VA3 Counter

SAVE: Speed downstream (downstream counter (DAY)) = e / | tAV1 - tAV2 |)

IF [DetecAV1] = YES AND IF [Detect AV2] = YES AND IF [tAV2> tAV1] AND IF

CounterAV3> 1 AND IF [Straight Rated Detection] = NO OR IF [Left Rated Detection] = NO for At = | tAV2-t |> 2 ^* (tAV2-tAV1)

OR IF [DetecAV1] = YES AND IF [Detect AV2] = YES AND IF [tAV2> tAV1] AND IF

CounterAV3 = 1 AND IF [Straight ramp hold detection = NO] AND IF [Left ramp hold detection] = NO for At = | tAV2-t |> 2 ^* (tAV2-tAV1)

THEN [Alarm message display] AND [Sound signal transmission] AND

Unkept Counter (DAY) = Unkept Counter (DAY) +1

The processor processes in parallel the events initiated by the upstream and downstream sensors, each event being the subject of a sequence and corresponding to the passage of a person (or two at the same time) at the section of stairs considered. Priority management allows the events "ramp hold detection" to be assigned to one sequence at a time.

Each sequence ends at tAV2 or tAM2.

The data of all the sequences (flow, speed, counters ...) are preserved to constitute all the data of the day.

Finally, the data transfer step is implemented as follows:

IF hour = 24h

TRANSFER values of the day: Flowing flow, Downflow (upstream and downstream), Passage speeds (upstream and downstream), Uninterrupted counter, ...

The proposed system and method therefore makes it possible to secure people by monitoring their stair railing and inviting them to do so when they forget it.

Claims

1. System (1) for monitoring the maintenance of a ramp of a staircase, comprising:

- stairs (10)

at least one stair rail (1 1),

at least one sensor (20) adapted to detect the hold of the ramp by an individual, and

a processor (32) connected to the ramp-holding sensor (20), and adapted to process signals transmitted by the ramp-holding sensor (20) and to generate an alert according to said signals,

the monitoring system (1) being characterized in that it further comprises at least one sensor (21) connected to the processor (32), said sensor (21) being adapted to detect a passage of an individual,

and in that the processor (32) is configured to generate an alert if the passage detection sensor (21) detects the passage of an individual and the ramp-hold detection sensor (20) detects no holding of ramp.

2. Monitoring system (1) according to claim 1, comprising at least one passage detection sensor (21) at each end of the staircase (10).

3. Monitoring system (1) according to claim 2, comprising, at each end of the staircase (10), a group (22) of passage detection sensors (21) comprising at least two sensors (21, 21 '). , 21 ") spaced from one another, the processor (32) being connected to said sensors (21, 21 ', 21") and configured to determine, from signals communicated by the sensors (21, 21', 21 ") of each group (22), a person's direction of a stairway and a speed of movement of the person.

4. Monitoring system (1) according to one of claims 1 to 3, wherein each passage detection sensor (21) is of the photoelectric sensor type comprising a transmitter (210) of light beam and a photoelectric cell (21 1 ) arranged opposite one another.

The monitoring system (1) according to claim 4 in combination with claim 3, wherein each group (22) of passage detection sensors comprises three sensors (21, 21 ', 21 "), and wherein:

two sensors (21, 21 ') are arranged so that the direction of their light beam is orthogonal to the direction of the staircase, and

a sensor (21 ") disposed between the two other sensors is arranged so that its light ray is intersecting with that of one of the two other sensors (21, 21 '),

and the processor (32) is configured to detect, from the signals communicated by the sensors (21, 21 ', 21 "), the presence of two people side by side.

6. Monitoring system (1) according to one of claims 3 to 5, wherein the sensors of the same group (22) are spaced a distance between

10 cm and 1 m, preferably between 30 cm and 0.7 m, and preferably equal to 0.5 m.

7. Monitoring system (1) according to one of the preceding claims, wherein each passage detection sensor (21) is positioned at a height between 0.5 m and 1, 2 m, preferably equal to 1 m .

8. Monitoring system (1) according to one of the preceding claims, wherein the ramp-holding sensor (20) is a contact sensor or proximity selected from the following group:

- Pressure sensor,

- thermosensitive sensor,

- photoelectric sensor,

- touch film covering a portion of the ramp,

- impedance measurement sensor

- video camera.

9. Monitoring system (1) according to one of the preceding claims, comprising a plurality of ramp-holding sensors (20) disposed at several locations of the ramp.

10. Monitoring system (1) according to one of the preceding claims, further comprising a light alerter (41) adapted to emit a light alert signal and / or a sound alerter (40) controlled by the processor, the signal warning light comprising an indicator light or an information display screen.

1 1 Method for monitoring (100) the holding of a ramp of a staircase, implemented by a system (1) comprising:

- stairs (10)

at least one stair rail (1 1),

at least one sensor (20) adapted to detect the holding of the ramp (1 1) by an individual, and

at least one sensor (21) disposed at one end of the staircase (10) and connected to the processor (32), said sensor (21) being adapted to detect a passage of an individual,

the method comprising, upon detecting (1 10) a passage through a pass detection sensor (21), performing the steps of the processor (32) of:

interrogating (120) each ramp-holding sensor (20), and

- If no ramp hold sensor (20) detects ramp hold, generate an alert (140).

12. Monitoring method (100) according to claim 1 1, implemented by a system (1) comprising two ramps (1 1) extending on either side of the staircase (10), at least one ramp-holding sensor (20) for each ramp (1 1), and wherein each group (22) of passage detection sensors comprises three sensors (21, 21 ', 21 ") of the photoelectric sensor type comprising a light beam emitter (210) and a photoelectric cell (21 1) arranged facing one another, and wherein:

two sensors (21, 21 ') are arranged so that the direction of their light rays is orthogonal to the direction of the staircase, and

a sensor (21 "), arranged between the two other sensors, is arranged so that its light ray is intersecting with that of one of the other two sensors,

and the processor (32) is configured to detect, from the signals communicated by the sensors, the presence of two people side by side, the method comprising the processor implementing the steps of:

- from acquired signals (1 10) by the passage sensors (21), detecting the presence of two people side by side on the stairs,

interrogating (120) the ramp-holding sensors of each ramp, and

for a ramp, if no ramp-holding sensor detects holding of the ramp, generating (140) an alert.

13. Computer program product, comprising code instructions for the implementation of the method according to one of claims 1 1 or 12 when executed by a processor (32).