FR3138909A1 - Subsystem for evaluating wear of at least one mechanical element constituting a device - Google Patents

Abstract

Title: Subsystem for evaluating wear of at least one mechanical element constituting a device The invention relates to a subsystem for evaluating wear of a mechanical element comprising a vibration sensor (11) connected to electronic processing means (2) and coupled to the mechanical element, a vibration generator (3) intended to produce vibrations transmitted to said mechanical element, the generator (3) being configured to produce a sequence of vibrations, the means of electronic processing (2) are programmed with at least one reference vibration profile of the mechanical element, and are configured to: trigger the vibration generator (3); analyze vibrations produced by the vibration generator (3) and captured by the vibration sensor (11) for determining a captured vibration profile of the mechanical element; issuing a notification relating to a deterioration of the captured vibration profile. Figure for abstract: Fig. 1

Description

Subsystem for evaluating wear of at least one mechanical element constituting a device Field of the invention

The field of invention is that of logistics.

The invention relates more particularly to a system and a method for conveying objects using reusable containers intended to contain the objects.

State of the art

Conventionally, object deliveries involve the use of a container intended to contain the object, and to form a protective envelope around this object.

Cardboards form such containers in the simplest way. These boxes are not, or very little, capable of supporting deliveries other than the first. In fact, the boxes tear or deform in an inelastic manner in the event of excessive impact, or careless handling.

Reusable boxes are increasingly being used to transport objects. These reusable boxes are made from more robust materials than cardboard. For example, such reusable boxes can be made from reinforced plastic, such as expanded polystyrene, which has much greater durability than cardboard.

These reusable boxes can be equipped with on-board electronics and, for example, with an external screen allowing, if necessary, delivery information to be displayed on the outside of the container. This avoids the use of self-adhesive labels to be printed for each delivery of a package made up of one of the reusable boxes.

This technique makes it possible to form packages whose container (the box) used for delivery is not intended to be thrown away following the first delivery.

However, the very nature of a delivery causes these reusable boxes to undergo shocks and potentially destructive handling. Thus, despite the significant durability sought, degradation of these reusable boxes is inevitable.

Different components of these boxes can therefore be damaged and weakened.

The walls of these boxes can, for example, break, split and crack, or become deformed. In this case, the boxes are made difficult to use, or even completely unusable. Indeed, during delivery, the contents of the box may be damaged or even lost.

Deterioration of a wall of these reusable boxes makes it impossible to reuse these boxes as containers for deliveries.

Consequently, a periodic inspection of the condition of these reusable boxes must be carried out to prevent a degraded box from being able to be reused.

Given the large number of reusable boxes that can be implemented as part of an object delivery system, inspecting each of these reusable boxes can become problematic.

This check of the wear of a box typically requires a human operator. This human operator can for example correspond to the person who has just received a reusable box, who can then observe and check the state of the reusable box before returning this reusable box.

Such control may not be sufficient and is inherently subjective. Wear may therefore not be detected.

Objectives of the invention

The invention aims in particular to respond to this problem.

More precisely, the invention aims to propose a subsystem for evaluating the wear of a physical element of a device in which it is integrated.

The invention also aims to provide reusable containers integrating a wear evaluation subsystem according to the invention.

The invention also aims to propose an object delivery system using reusable containers whose wear can be easily controlled, despite a large number of reusable containers.

The invention also aims to provide such a system which makes the detection of wear more reliable when checking the reusable container.

These objectives, as well as others which will appear subsequently, are achieved thanks to the invention which relates to a subsystem for evaluating wear of at least one physical element constituting a device in which is integrated said subsystem,
said subsystem comprising at least one vibration sensor connected to electronic processing means and coupled to the physical element,
the subsystem also comprising:
- at least one vibration generator intended to produce vibrations transmitted to said physical element, the generator being configured to produce a sequence of vibrations with at least one predetermined frequency and at least one amplitude,
and the electronic processing means are programmed with at least one reference vibration profile of the physical element, and are configured for:
- periodically trigger the vibration generator, or automatically after the detection of a predetermined event detected by at least one sensor connected to the electronic processing means, or trigger the vibration generator by a one-off request for activation of the vibration subsystem wear assessment;
- analyze vibrations produced by the vibration generator and captured by the vibration sensor to determine a captured vibration profile of the physical element;
- issue a notification relating to a deterioration of the vibration profile captured in relation to the at least one reference vibration profile of the physical element.

In other words, the electronic processing means are programmed to, substantially in parallel, on the one hand, trigger the production of a series of vibrations or vibration profile transmitted to the physical element and on the other hand capture directly or indirectly the vibrations produced, retransmitted by and therefore through the physical element.

Thanks to these technical characteristics, the wear evaluation subsystem which integrates its own vibration generator, produces a reference vibration profile which it submits directly or indirectly to the physical element under surveillance. Thus, for the analysis, the source of the vibrations is perfectly controlled and the vibrations generated are reproducible. The comparison of the captured vibration data forming the vibration profile to be analyzed with the reference vibration profile then makes it possible to follow the evolution of the aging of the physical element.

In addition, the wear evaluation subsystem has the advantage of autonomously monitoring the physical element under observation and allowing self-diagnosis.

According to a preferred embodiment of the invention, the or one of the reference vibration profiles of the physical element corresponds to a vibration profile of the physical element in a new state, or in a repaired state, or in a transient state determined by vibration analysis at a predetermined instant.

According to another solution, the or one of the reference vibration profiles of the physical element corresponds to an aggregate of vibration profiles of physical elements previously analyzed by the electronic processing means.

According to a particularly advantageous embodiment of the invention, the vibration generator and/or the vibration sensor are coupled directly to the physical element. In other words, the generator and/or the vibration sensor is in direct contact and therefore has a common interface with the physical element to be observed. This makes it possible to obtain the vibrational signature of said physical element over the life of the product in which it is integrated.

Thanks to these characteristics, only the response to the vibration profile of the physical element integrated into the device is analyzed. It is thus possible to precisely determine the maintenance, repair or replacement of the physical element concerned, when a wear threshold is crossed, unlike an indirect coupling which provides the vibration response of an assembly of elements or mechanism in which it remains to identify the tired physical element.

According to a particular embodiment of the invention, the vibration sensor is chosen from a group comprising an accelerometer, a velocimeter, a displacement sensor, a resistive strain gauge.

According to one embodiment, the invention also provides a reusable container intended to contain objects, forming the device which comprises the physical element and the wear evaluation subsystem.

Thus, a device of the containing type which permanently includes the entire wear evaluation subsystem according to the invention, can throughout its lifespan evaluate at any time and according to need, the level wear of the physical element under surveillance.

According to a preferred embodiment of the invention, the one-off request for activation of the wear evaluation subsystem is issued when the container is in a reference situation .

Thanks to these characteristics, the acquisition of a new vibration profile for control, observation or monitoring can be carried out under conditions similar to those in which a reference vibration profile of the physical element under surveillance was acquired. For example, the reference situation is that of the device equipped with the physical element under surveillance, the whole being unused and at rest. Calibration can for example take place at the end of the production line of the device equipped with the wear evaluation subsystem, by acquiring the reference vibration profile in new condition, as described below. Thus, the reference vibration profile is specific to the physical element under observation. Aging monitoring is therefore personalized and specific to the physical element under observation. In other words, the acquisition of a new vibration profile on request in a situation similar to that of reference, that is to say in a known and substantially reproducible situation, makes the comparative analysis of vibration profiles and the diagnosis of fatigue or wear of the physical element of the device thus equipped.

It is understood that the reference situation can be defined according to other criteria. For example, for a container, the reference situation may be that of a container not empty, but with a specific load placed in the container. This determined load is chosen so as to highlight a particular characteristic of the container using the vibration profile which is recorded and analyzed.

According to an advantageous embodiment of the invention, the physical element to which the vibration generator is coupled is a wall of said container.

According to a particularly advantageous embodiment of the invention, the container comprises a display device intended to be visible to a user of the system, and in that the electronic processing means are configured to display on the display device the notification relating to a deterioration of the captured vibration profile, said notification being issued by the wear evaluation subsystem.

Thus, the device which integrates the wear evaluation subsystem, here the container, can inform the user of its condition and its degradation.

According to one embodiment, the invention also provides a preventive maintenance system comprising wear evaluation subsystems, a remote server, and for each subsystem means of communication with the remote server which is configured to record the notification relating to the degradation of the vibration profile captured by each wear evaluation subsystem.

Thanks to these technical characteristics, each wear evaluation subsystem is supervised and the history of notifications of degradation of the vibration profile of the physical element under surveillance is stored.

In addition, the aggregation of the vibration profiles of several wear evaluation subsystems coupled to physical elements of the same types makes it possible to cross-reference the history of aging and degradation information for said elements so as to facilitate the implementation a preventive maintenance strategy, anticipating breakdowns and operational stoppages.

According to a particular embodiment of the invention, each wear evaluation subsystem is integrated into a container forming a fleet of reusable object delivery containers, supervised by the preventive maintenance system.

Thanks to these technical characteristics, the wear of a fleet of containers is monitored, for preventive maintenance purposes.

According to one embodiment, the invention also provides a method for evaluating wear of at least one physical element constituting a device integrating a wear evaluation subsystem which implements the method, the wear evaluation subsystem comprising:
- at least one vibration sensor connected to electronic processing means and coupled to the physical element;
- at least one vibration generator intended to produce vibrations transmitted to said physical element, the generator (3) being configured to produce a sequence of vibrations with at least one predetermined frequency and at least one amplitude,
the electronic processing means (2) being programmed with at least one reference vibration profile of the physical element,

the process comprising the steps of:
- periodically trigger the vibration generator (3), or automatically after the detection of a predetermined event detected by at least one sensor connected to the electronic processing means (2), or trigger the vibration generator (3) by a one-off request activation of the wear evaluation subsystem;
- analyze vibrations produced by the vibration generator (3) and captured by the vibration sensor (11) to determine a captured vibration profile of the physical element;
- issue a notification relating to a deterioration of the vibration profile captured in relation to the at least one reference vibration profile of the physical element.

Furthermore, the invention also relates to an object delivery system comprising:
- reusable containers intended to contain objects;
- at least one accelerometer per container;
- electronic processing means;
characterized in that it comprises a subsystem for evaluating the wear of reusable containers comprising:
- at least one vibration generator intended to produce vibrations in at least one wall of at least one of the reusable containers, the generator being configured to produce a sequence of vibrations with at least one predetermined frequency and at least one amplitude,
and in that, for each container, the electronic processing means are programmed with at least one reference vibration profile of the container, and are configured for:
- analyze vibrations produced by the vibration generator and captured by the accelerometer to determine a captured vibration profile of the container;
- issue a notification relating to a deterioration of the vibration profile captured in relation to the at least one reference vibration profile of the container.

Thanks to the object delivery system according to the invention, a reusable container can have its wear evaluated using a sequence of vibrations produced by the vibration generator and thanks to the capture of these vibrations by the accelerometer said reusable container and the analysis of these vibrations.

Wear and tear of a container corresponds, for example, to weakening, fracturing, degradation, or breakage of the container.

The analysis of the vibrations produced makes it possible to compare the vibration profile captured with the reference vibration profile.

This captured vibration profile, compared to the reference vibration profile, makes it possible to determine a level of degradation of the vibration profile and to know whether a predetermined level of degradation is reached or exceeded, or even to know the location of the degradation on the container.

This wear assessment of reusable containers is carried out without necessarily involving an operator, intended for example to carry out a visual inspection of the container. Preventive maintenance, for example automated, of the system's containers is possible.

Thanks to an analysis of the vibration profile captured in relation to a reference vibration profile, the detection of visually undetectable wear can be detected to avoid the use of a container which would in reality be unsuitable for carrying out transport of 'objects.

According to a preferred variant, the reusable containers are reusable parcel boxes which each include at least one accelerometer.

In this case, the reference vibration profile of the container corresponds to a reference vibration profile of the reusable box.

Such an application of the system according to the invention to containers of the "reusable parcel box" type is particularly advantageous in that these boxes undergo potentially destructive handling during their transport for delivery, and it is then important to be able to control their ability to be reused.

According to a preferred embodiment, each container integrates at least one vibration generator, the electronic processing means being configured to activate the vibration generator(s).

In this way, a check of the structural integrity of a container can be carried out autonomously, even when the container is used to make a delivery or is waiting to be used to make a delivery. In this case, the electronic processing means activate the vibration generator(s) integrated into the container, capture vibrations using the accelerometer integrated into the container, then analyze the vibrations.

Alternatively or additionally, the system includes an external vibration generator, separate from the reusable boxes.

Such an external generator can be used by a human operator, or by a controller, intended to bring said generator into contact with a wall of a box to be controlled.

Preferably, the system comprises, each container, a computer unit forming at least partially the electronic processing means.

This makes it possible to conduct an analysis of the vibrations produced by the vibration generator directly using the computer unit of the container.

The computer unit can then alone issue the notification relating to the vibration profile captured and, if necessary, put itself out of service if the wear of the container is too significant or request a return for maintenance.

According to a preferred design, the computer unit is integrated into the container, and preferably into one of the walls of the container.

The integration of the computer unit with the container is then optimized.

According to another preferred design, the computer unit is attached to the container, the system comprising means for coupling the computer unit to a container.

In other words, coupling means ensure the integration and mechanical connection of the computer unit attached to the container.

This makes it possible to use computer units with different types of containers, and potentially containers not initially designed to be part of the system according to the invention.

Advantageously, the system comprises a remote server, and means of communication with the remote server for each container, the remote server being configured to record the notification relating to the degradation of the vibration profile captured.

In this way, the remote server groups together notifications relating to the degradation of the vibration profile captured from the system's containers.

This avoids having to repatriate and consult each container in the system to become aware of container degradation.

The remote server can advantageously be configured so that, upon receipt of a notification relating to the degradation of the vibration profile captured from a container, it schedules preventive maintenance of said container.

The system then greatly simplifies container maintenance operations.

Advantageously, the remote server can at least partially form the electronic processing means.

In this case, the analysis of the vibrations, produced by the vibration generator and captured by the accelerometer, to determine a captured vibration profile of the container, can be carried out by electronic means more powerful than those of the computer unit of a container.

The means of communication for each container are designed to transmit to the remote server the data relating to the vibrations captured by the accelerometer so that the remote server analyzes these vibrations.

According to a preferred solution, the generator is configured to produce at least two vibration sequences with at least two different predetermined frequencies and/or at least two different predetermined amplitudes.

A plurality of vibration sequences makes it possible to improve the detection of possible structural defects in a container.

According to an advantageous solution, the or one of the reference vibration profiles of the container corresponds to a vibration profile of the container in a new state, or in a repaired state, or in a transient state determined by vibration analysis at a predetermined instant.

The vibration profile of the container in new condition corresponds to the vibrations captured by the container's accelerometer following the emission of vibrations by a vibration generator of the system after the design and manufacture of the container. Such a reference vibration profile makes it possible to precisely calibrate the original level of the vibration profile.

The vibration profile of the container in a transient state corresponds to the vibrations captured by the accelerometer of the container following the emission of vibrations by a vibration generator of the system at a predetermined instant, for example automatically or at the request of the remote server after use of the container.

According to another solution, the or one of the reference vibration profiles of the container corresponds to an aggregate of vibration profiles of containers previously analyzed by the electronic processing means.

The system then implements artificial intelligence to analyze such a data flow. Such a method makes it possible to enrich, through the experience of artificial intelligence and observations of degradation, the reference vibration profile.

Advantageously, the electronic processing means are configured to periodically trigger the vibration generator, or automatically after the detection of a predetermined event detected by at least one sensor of the container.

A periodic check of the structural condition of a container can thus be carried out and the evolution of wear can be noted to enable maintenance of the damaged container to be scheduled as accurately as possible.

A predetermined event may correspond to a fall of the container, or to a significant shock. The detection of such an event can for example be carried out using the accelerometer. Carrying out a check following such a predetermined event is particularly advantageous in that it allows you to know directly whether this predetermined event has resulted in damage likely to render the container unusable.

According to an advantageous characteristic, the system comprises a display device intended to be visible to a user of the system, and the electronic processing means are configured to display on the display device the notification relating to a deterioration of the vibration profile captured .

In this way, the system allows a user of the system to become directly aware of any damage observed to a container, without delay.

• une production d’une séquence de vibrations avec une fréquence et une amplitude prédéterminée, dans une paroi de l’un des contenants réutilisables ;
• une captation des vibrations se propageant dans la paroi du contenant par l’accéléromètre ;
• une analyse des vibrations captées.

The invention also relates to an object delivery method comprising reusable containers intended to contain objects and each comprising an accelerometer, -
characterized in that it comprises a step of evaluating the wear of the reusable containers implementing, during the evaluation of the wear of one of the containers:

• producing a sequence of vibrations with a predetermined frequency and amplitude, in a wall of one of the reusable containers;
• capture of the vibrations propagating in the wall of the container by the accelerometer;
• an analysis of the vibrations captured.

Preventive maintenance of reusable containers, allowing other objects to be transported, is then possible, for example by scheduling a shipment to a repair center.

Figures

• la est une représentation schématique d’un premier mode de réalisation d’un système d’acheminement d’objets selon l’invention, comprenant un contenant réutilisable du type boîte à colis réutilisable ;
• la est une représentation schématique d’un deuxième mode de réalisation du système d’acheminement d’objet selon l’invention, comprenant un contenant quelconque.

Other characteristics and advantages of the invention will appear more clearly on reading the following description of different preferred embodiments of the invention, given by way of illustrative and non-limiting examples, and the appended figures:

• there is a schematic representation of a first embodiment of an object delivery system according to the invention, comprising a reusable container of the reusable parcel box type;
• there is a schematic representation of a second embodiment of the object delivery system according to the invention, comprising any container.

Detailed description of the invention

The subsystem for evaluating wear of at least one physical element according to the invention is intended to be integrated into a device which includes the physical element to be monitored. Thus, such a wear evaluation subsystem is a subassembly embedded in a third-party device. An example of a third-party device is described below with a reusable container 1 embedding such a wear evaluation subsystem.

• au moins un capteur de vibration 11 physiquement couplé, directement ou indirectement, à l’élément physique à observer,
• au moins un générateur 3 de vibrations destiné à produire des vibrations transmises, directement ou indirectement, à élément physique du dispositif support,

According to the invention, such a subsystem comprises:

• at least one vibration sensor 11 physically coupled, directly or indirectly, to the physical element to be observed,
• at least one vibration generator 3 intended to produce vibrations transmitted, directly or indirectly, to the physical element of the support device,

• déclencher périodiquement le générateur 3 de vibrations, ou automatiquement après la détection d’un événement prédéterminé détecté par au moins un capteur relié aux moyens de traitement électroniques 2, ou déclencher le générateur 3 de vibrations par une requête ponctuelle d’activation du sous-système d’évaluation d’usure ;
• analyser des vibrations produites par le générateur 3 de vibrations et captées par le capteur de vibration 11 pour déterminer un profil vibratoire capté de l’élément physique ;
• émettre une notification relative à une dégradation du profil vibratoire capté par rapport à l’au moins un profil vibratoire de référence de l’élément physique.

Furthermore, this vibration sensor 11 is connected, so as to communicate, to electronic processing means 2. As we will see later in this description, the electronic processing means 2 are programmed with at least one reference vibration profile of the physical element, and are configured for:

• periodically trigger the vibration generator 3, or automatically after the detection of a predetermined event detected by at least one sensor connected to the electronic processing means 2, or trigger the vibration generator 3 by a one-off request for activation of the subsystem wear assessment;
• analyze vibrations produced by the vibration generator 3 and captured by the vibration sensor 11 to determine a captured vibration profile of the physical element;
• issue a notification relating to a deterioration of the vibration profile captured in relation to the at least one reference vibration profile of the physical element.

In Figures 1 and 2, the wear evaluation subsystem is shown perfectly integrated into the device and system described below, in which all of the containers in the system form a transport fleet in the sense of invention.

Thus, the object routing system according to the invention, represented by the , implements an object routing method according to the invention.

• des contenants 1 réutilisables ;
• des moyens de traitement électroniques 2.

With reference to Figures 1 and 2, the object routing system includes:

• reusable containers 1;
• electronic processing means 2.

The system also includes a remote server 4.

According to the embodiment illustrated by , reusable containers 1 are reusable parcel boxes. These boxes can be used to send items as packages.

In reference to the , the container 1 shown is a transport box.

According to the principle of the invention with reference to Figures 1 and 2, the system also includes a subsystem for evaluating the wear of reusable containers 1.

This evaluation subsystem comprises at least one vibration generator 3 intended to produce vibrations in a wall of at least one of the reusable containers 1. This or these generators 3 are designed to produce at least one sequence of vibrations with at least one frequency and at least one predetermined amplitude.

According to the embodiment represented in , the evaluation subsystem comprises at least one vibration generator 3 integrated in each container 1.

More specifically, each container 1 comprises two vibration generators 3.

According to the embodiment represented in , the evaluation subsystem comprises a single vibration generator 3 integrated into the container 1.

According to a possible embodiment, the vibration generator 3 is an external generator and is distinct from the reusable containers 1. This external generator is intended to be affixed to the surface of a wall of one of the containers 1 to produce a sequence of vibrations with a predetermined frequency and amplitude.

According to another possible embodiment, it is possible for the system to include vibration generators 3 integrated into each container 1, as well as external vibration generators 3.

In reference to the , Each reusable container 1, of the parcel box type, consists of a box 101 and a cover 102 movably mounted on the box 101 between a closed position of the box 101 and an open position allowing access to an internal volume delimited by the box 101 and, possibly, an object that the reusable box contains. More particularly, the internal volume of the box 101 is delimited by a bottom wall and several side walls extending from the bottom wall, the side walls being butted together to form a peripheral contour of the internal volume.

The cover 102 is in this case pivotally mounted on the body 101.

A vibration generator 3 is integrated into one of the walls of the box 101 of the reusable box illustrated, and another vibration generator 3 is integrated into the wall of the cover 102 of the reusable box.

The use of at least two vibration generators 3 makes it possible to multiply the places where vibrations are generated in the walls of a reusable container 1.

A vibration generator 3 can take different forms.

A vibration generator 3 can for example be formed by a flyweight, or a vibrating element such as an unbalanced propeller.

It is also possible that a vibration generator 3 is formed by a vibrating surface (for example the membrane of a loudspeaker), or by an ultrasound generator.

These generators 3 are configured to produce said at least one sequence of vibrations with a predetermined frequency and amplitude. Advantageously, at least two vibration sequences with distinct predetermined frequencies and amplitudes are produced.

A sequence of vibrations may comprise a single frequency or a plurality of frequencies, the frequency of the vibrations changing as the sequence progresses, and a single amplitude or a plurality of amplitudes, the amplitude of the vibrations changing as the sequence progresses. as the sequence progresses.

• au moins un accéléromètre 11 ;
• une unité informatique 12 ;
• des moyens de communication 13 avec le serveur distant 4 ;
• un écran 14 ;
• des accumulateurs électriques destinés à stocker de l’énergie électrique et à alimenter les fonctions électroniques de chaque contenant 1, dont notamment l’accéléromètre 11, l’unité informatique 12, les moyens de communication 13, et l’écran 14.

With reference to Figures 1 and 2, the system includes for each container 1:

• at least one accelerometer 11;
• a computer unit 12;
• means of communication 13 with the remote server 4;
• a screen 14;
• electric accumulators intended to store electrical energy and to power the electronic functions of each container 1, including in particular the accelerometer 11, the computer unit 12, the means of communication 13, and the screen 14.

The accelerometer 11 is designed, among other things, to capture vibrations produced by the generator(s) 3 and propagating in the walls of the container 1.

The screen 14 is located on an external face of the reusable container 1 and is intended to be visible from the outside.

Such a screen 14 is for example capable of displaying usage information for the reusable container 1, such as a destination address for the container 1.

More generally, the system comprises a display device 5 intended to be visible to a user U of the system.

This display device 5 can for example be formed by the screen 14 of each container 1.

In reference to the , the display device 5 can also be formed, alternatively or complementary with the screen 14, by an electronic device 51 of the user U such as a smartphone.

As illustrated in Figures 1 and 2, the remote server includes data exchange means 41 and an electronic processing unit 42.

The data exchange means 41 of the remote server 4 are designed to allow the reception and sending of data from and to each container 1 via the communication means 13.

According to one embodiment, electronic processing means 2 are formed by the computer unit 12 of each container 1.

According to another envisaged embodiment, the electronic processing means 2 are formed by the electronic processing unit 42 of the remote server 4.

Finally, depending on the embodiment of the , the electronic processing means 2 are partially formed by the computer unit 12 of each container 1 as well as by the electronic processing unit 42 of the remote server 4.

In reference to the , the computer unit 12 is integrated into the container 1, and more particularly into one of the walls of the container 1.

More precisely, the container 1 is designed to present a housing in one of its walls which is complementary in shape to the computer unit 12.

In reference to the , the computer unit 12 is attached to the container 1. The system then comprises means for coupling the computer unit 12 to the container 1.

The computer unit 12 can take the form of an electronic tablet.

The coupling means can for their part take the form of an adhesive, and/or fixing lugs, and/or screws, and/or any other means capable of allowing the coupling of the computer unit 12 to a containing 1.

According to the embodiments of Figures 1 and 2, the vibration generators 3 are integrated into the containers 1 but are distinct from the computer units 12.

The vibration generators 3 are then connected to the computer units 12 via a wired connection or a wireless connection. These generators 3 can be provided with their own electrical power supply means and are either integrated into one of the walls of the container 1, or fixed to one of the walls of the container 1.

It is possible for a vibration generator 3 to be integrated into a computer unit 12.

Comparably, the accelerometers 11 can be integrated into the containers 1 in the computer unit 12 and/or outside the computer unit 12.

In reference to the , a single accelerometer is integrated into the container 1 outside the computer unit 12.

According to another possible embodiment, this single accelerometer 11 can however be integrated into the computer unit 12.

In reference to the , two accelerometers 11 are integrated into the container 1, including one outside the computer unit 12 and another in the computer unit 12.

In the case where an accelerometer is integrated outside the computer unit 12, this accelerometer 11 is connected to the computer unit 12 via a wired link or a wireless link. This accelerometer can be provided with its own electrical power supply means. Finally, the accelerometer is then either integrated into one of the walls of container 1, or fixed to one of the walls of container 1.

According to the principle of the invention, for each container 1, the electronic processing means 2 are programmed with at least one reference vibration profile of the container 1.

This reference vibration profile can for example correspond to the vibration profile of a new model of container 1.

The reference vibration profile can also correspond to a repaired state of the container 1, or to a transient state determined by vibration analysis at a predetermined instant.

This predetermined instant may correspond to the occurrence of an event occurring on the container 1 and captured by a sensor of the container 1, such as the accelerometer 11. For example, a fall of the container 1, followed by an impact of the container 1 , can be captured by the accelerometer 11.

The reference vibration profile can also correspond to an analysis by artificial intelligence of an aggregate of vibration profiles of containers 1 1 previously analyzed. In this case, it is advantageous for the container 1 to have a standardized design and format such as is the case for the container 1 of the embodiment of the which is a reusable parcel box.

The reference vibration profile(s) are advantageously established when container 1 is empty.

For this purpose, the system is configured to detect, for example using the weight sensor or a camera located in the container 1, that the container 1 is empty, to authorize the establishment of a vibration profile of reference.

The reference vibration profile(s) can also be established following loading of container 1 and its closing.

• analyser les vibrations produites par le ou les générateurs 3 de vibrations, et captées par l’accéléromètre 11, pour déterminer un profil vibratoire capté du contenant 1 ;
• émettre une notification relative à une dégradation du profil vibratoire capté par rapport au profil vibratoire de référence du contenant 1.

The electronic processing means 2 are configured for:

• analyze the vibrations produced by the vibration generator(s) 3, and captured by the accelerometer 11, to determine a captured vibration profile of the container 1;
• issue a notification relating to a deterioration of the vibration profile captured compared to the reference vibration profile of container 1.

Of course, issuing the notification relating to the degradation of the vibration profile captured in relation to the reference vibration profile involves an analysis of the vibration profile captured in relation to the reference vibration profile. Observing a deterioration of the captured vibration profile may result in the issuance of the notification from a predetermined degree of degradation below which deterioration is not disabling.

The analysis can be carried out in such a way that the difference between the reference vibration profile and that captured is used to determine the type of wear, the severity and the location on container 1.

As mentioned previously, each container 1 can communicate with the remote server 4.

In this way, the remote server 4 receives the notification relating to the degradation of the vibration profile captured in relation to the reference vibration profile of the container 1.

This remote server 4 is configured to record this notification.

In the case where the analysis is carried out by the electronic processing organs 42 of the remote server 4, then the notification is sent to the container 1.

Advantageously, the remote server 4 is configured to schedule preventive maintenance of the container 1 upon receipt of a notification relating to excessive degradation of the vibration profile captured compared to the reference vibration profile.

The preventive maintenance of container 1 can only be recorded and programmed in the remote server 4 which, associated with an identifier of container 1 that is too degraded, results in maintenance of container 1 as soon as the latter arrives in a place where it is likely to be repaired, or at the very least removed from the object transport circuits.

Advantageously, the remote server 4 is configured to send maintenance need information to the container 1.

Upon receipt of this maintenance need information, the electronic processing means 2 of the system are programmed to put the container 1 in a non-use configuration.

In this case, the electronic processing means 2 inform, for example via the screen 14, the users U of the inability of the container 1 to transport an object, and display on the screen 14 of the container 1 an address destination of a maintenance center of container 1.

Container 1 can thus be sent for maintenance to the maintenance center.

Advantageously, the electronic processing means 2 are configured to periodically trigger the vibration generator 3.

In this way, a periodic check of the integrity of the reusable container 1 is implemented.

• espacée de manière importante dans le temps si une dégradation faible par rapport à un état neuf du profil vibratoire du contenant 1 est enregistrée ;
• rapprochée dans le temps dès qu’une dégradation de plus en plus importante du profil vibratoire capté est détectée par rapport au profil vibratoire de référence.

The frequency of triggering of the vibration generator 3 can be:

• spaced significantly over time if a slight degradation compared to a new state of the vibration profile of container 1 is recorded;
• closer in time as soon as an increasingly significant deterioration of the captured vibration profile is detected compared to the reference vibration profile.

The electronic processing means 2 can also occasionally require activation of the wear evaluation subsystem, and trigger the vibration generator 3.

This activation can result from a command, or request, from the remote server 4, from an action carried out on the container 1, or else result from an automation whose trigger can for example be a shock detected on the container 1 by a sensor of container 1, such as accelerometer 11.

The electronic processing means 2 may also require activation of the wear evaluation subsystem following the request to carry out a delivery using the container 1, or following the closing of the container 1 after a delivery, so as to ensure that container 1 is able to make a delivery.

The electronic processing means 2 may also require activation of the wear evaluation subsystem following the detection of a predetermined event detected by at least one sensor of the container 1. Following this evaluation, if the container 1 is considered suitable for continuing deliveries, it is possible that a new reference vibration profile is established as mentioned previously.

In this way, it is easier to determine, as accurately as possible, as soon as the degradation threshold invalidating the use of reusable container 1 is reached or exceeded.

As a reminder, the system includes a display device 5 intended to be visible to a user U of the system.

The electronic processing means 2 are configured to display on the display device 5 the notification relating to a deterioration of the vibration profile captured.

The delivery method according to the invention uses reusable containers 1 intended to contain objects and each comprising at least one accelerometer 11.

This process includes a step of evaluating the wear of reusable containers.

• une production d’une séquence de vibration avec une fréquence et une amplitude prédéterminées, dans une paroi de l’un des contenants réutilisables ;
• une captation des vibrations se propageant dans la paroi du contenant par l’accéléromètre ;
• une analyse des vibrations captées.

The step of evaluating wear of reusable containers includes, when evaluating the wear of one of the containers:

• producing a vibration sequence with a predetermined frequency and amplitude, in a wall of one of the reusable containers;
• capture of the vibrations propagating in the wall of the container by the accelerometer;
• an analysis of the vibrations captured.

The production of a sequence of vibrations with a predetermined frequency and amplitude is carried out by the vibration generator 3.

Advantageously, this production of a sequence of vibrations is carried out directly in a wall of the container 1 due to the fact that the vibration generator 3 is integrated directly into the container 1 and more specifically on or in the wall of one of the containers 1.

As explained previously, this production of a sequence of vibrations with a predetermined frequency and amplitude can also give rise to the production of other sequences of vibrations with other frequencies and other predetermined amplitudes.

Capturing the vibrations propagating in the wall(s) of the container 1 by the accelerometer 11 makes it possible to capture the frequency and amplitude of the vibrations after they have propagated in the wall.

This vibration capture makes it possible to determine a captured vibration profile.

Then, analysis of the vibrations captured makes it possible to determine whether degradation of container 1 has occurred.

This analysis implements algorithms making it possible to determine whether or not container 1 has reached or crossed a single point of excessive degradation. Advantageously, this analysis is also carried out to provide information on the type of degradation, its severity, and its location.

This analysis of the captured vibrations, and thus of the captured vibration profile, is carried out in relation to the reference vibration profile.

The step of evaluating wear of the reusable boxes can also implement, subsequent to the analysis of the vibrations captured, a recording and emission of a notification relating to a deterioration of the vibration profile captured in relation to the vibration profile reference number of container 1.

The object delivery system according to the invention thus uses reusable boxes which can themselves, at any time, following a shock or a triggering event or on demand, control easily their state of mechanical wear.

Also, preventive maintenance can be scheduled as soon as a serious fault is detected, remotely and on demand.

In variants of the embodiments of the invention detailed above, it can also be planned to use other types of vibration detector than the accelerometer, that is to say any recorder of the transmission of a mechanical vibration.

Nevertheless, by accelerometer, it is necessary to understand all types known to those skilled in the art and in particular piezoelectric accelerometers, piezoresistive accelerometers, optical fiber accelerometers, servo-controlled accelerometers with torque balance or force balance, accelerometers resonator, accelerometers with capacitive electromechanical microsystems known under MEMS terminology (the English acronym for “micro electro mechanical system”).

The vibration detector can also be a velocimeter. In this case, we must of course include electrodynamic velocimeters, laser velocimeters also known under the terminology of vibrometers, ultrasonic velocimeters.

The vibration detector can also be a displacement sensor. This includes all types of displacement sensors and in particular inductive displacement sensors, capacitive displacement sensors, optical displacement sensors (in particular by interferometry, laser triangulation, reflection or transmission), differential transformer displacement sensors, stretched-wire displacement sensors of the potentiometer or encoder type.

The technique described above for producing a wear evaluation subsystem of at least one physical element can be used in different types of fixed or on-board devices, for example to constitute a package, a package or even luggage. like a trunk or a suitcase.

Furthermore, the term physical element must be understood in the broad sense encompassing a mechanical part, a mechanism or mechanical subassembly, or even an electronic card.

Claims (11)

Subsystem for evaluating wear of at least one physical element constituting a device in which said subsystem is integrated,
said subsystem comprising at least one vibration sensor (11) connected to electronic processing means (2) and coupled to the physical element,
characterized in that the subsystem comprises:
- at least one vibration generator (3) intended to produce vibrations transmitted to said physical element, the generator (3) being configured to produce a sequence of vibrations with at least one predetermined frequency and at least one amplitude,
and in that the electronic processing means (2) are programmed with at least one reference vibration profile of the physical element, and are configured to:
- periodically trigger the vibration generator (3), or automatically after the detection of a predetermined event detected by at least one sensor connected to the electronic processing means (2), or trigger the vibration generator (3) by a one-off request activation of the wear evaluation subsystem;
- analyze vibrations produced by the vibration generator (3) and captured by the vibration sensor (11) to determine a captured vibration profile of the physical element;
- issue a notification relating to a deterioration of the vibration profile captured in relation to the at least one reference vibration profile of the physical element. Wear evaluation subsystem according to the preceding claim, characterized in that the generator (3) is configured to produce at least two vibration sequences with at least two different predetermined frequencies and/or at least two different predetermined amplitudes. Wear evaluation subsystem according to any one of the preceding claims, characterized in that the or one of the reference vibration profiles of the physical element (1) corresponds to a vibration profile of the physical element (1) to a new state, or to a repaired state, or to a transient state determined by vibration analysis at a predetermined time. Wear evaluation subsystem according to any one of claims 1 to 3, characterized in that the or one of the reference vibration profiles of the physical element (1) corresponds to an aggregate of vibration profiles d physical elements previously analyzed by electronic processing means (2). Reusable container (1) intended to contain objects, characterized in that it forms the device comprising the physical element and the wear evaluation subsystem according to one of the preceding claims. Reusable container (1) according to the preceding claim, characterized in that the one-off request for activation of the wear evaluation subsystem is issued when the container is in a reference situation. Reusable container (1) according to one of claims 5 or 6, characterized in that the physical element to which the vibration generator (3) is coupled is a wall of said container. Reusable container (1) according to one of claims 5 to 7, characterized in that it comprises a display device (5) intended to be visible to a user (U) of the container (1), and in this that the electronic processing means (2) are configured to display on the display device (5) the notification relating to a deterioration of the vibration profile captured, said notification being issued by the wear evaluation subsystem. Preventive maintenance system comprising wear evaluation subsystems according to any one of claims 1 to 4, characterized in that the system comprises a remote server (4), and for each subsystem means of communication (13) with the remote server (4) which is configured to record the notification relating to the degradation of the vibration profile captured by each subsystem. Preventive maintenance system according to the preceding claim, in which each wear evaluation subsystem is integrated into a container according to one of claims 5 to 8, forming a fleet of reusable object delivery containers. Method for evaluating wear of at least one physical element constituting a device integrating a wear evaluation subsystem which implements the method, the wear evaluation subsystem comprising:
- at least one vibration sensor (11) connected to electronic processing means (2) and coupled to the physical element;
- at least one vibration generator (3) intended to produce vibrations transmitted to said physical element, the generator (3) being configured to produce a sequence of vibrations with at least one predetermined frequency and at least one amplitude,
the electronic processing means (2) being programmed with at least one reference vibration profile of the physical element,

the process characterized in that it comprises the steps of:
- periodically trigger the vibration generator (3), or automatically after the detection of a predetermined event detected by at least one sensor connected to the electronic processing means (2), or trigger the vibration generator (3) by a one-off request activation of the wear evaluation subsystem;
- analyze vibrations produced by the vibration generator (3) and captured by the vibration sensor (11) to determine a captured vibration profile of the physical element;
- issue a notification relating to a deterioration of the vibration profile captured in relation to the at least one reference vibration profile of the physical element.