DESCRIPTION

TECHNICAL FIELD OF THE INVENTION

The technical field of the invention is linked to that of the office furnishings industry, especially with interactive elements.

STATE OF THE ART

Typically different requirements need to be taken into account regarding quality, comfort, ergonomics, etc. of the furniture according to the intended use (e.g. office, outdoor, etc.).

Despite ergonomics is gaining importance in furniture design, there is room for improvement since known proposals are not adaptive or interactive. Besides, improvements do not usually focus on desks but in other furnishings elements. On the other hand, user's comfort is key when spending long periods of time, which is normally in a workspace.

In particular, it has been observed that current desks fail to dynamically respond to user's changes or needs. Known mechanisms are mainly directed to manually modify basic aspects of the desk.

In view of the above, it would be desirable a desk to optimize well-being at work and thus productivity can be improved.

BRIEF DESCRIPTION OF THE INVENTION

The invention described herein relates to an office desk which is interactive with the user and which has a series of mobile elements operated by an artificial intelligence system fed by dynamic sensors which gather data directly from the user's conduct at the work station. The system gathers a multiplicity of data concerning the user's working posture and habits and recommends a customised work programme displayed on a built-in screen and which is run by operating the motor-driven parts of the desk: legs, desktop and footrest.

Advantageously, according to the invention the work desk may be ergonomic and may allow automated movement of components.

Beneficially, the work desk may make use of Artificial Intelligence algorithms with sensor data applied to the individual to create patterns of use. Usefully, height and position of components at the workstation may change over time in accordance to conclusions drawn by the algorithms used by the invention.

DESCRIPTION OF THE FIGURES

For a better understanding of the invention, a page of plans is attached showing the following.

Figure 1 : A diagram of the desk (M) and its components.

Figure 2: A diagram of the system as a whole.

DETAILLED DESCRIPTION OF THE INVENTION

An embodiment as a way of example for a better understanding of the invention is described herein with reference to the accompanying drawings. The embodiment relates to a smart office desk interactive with the user based on an individual work desk and various hardware and software elements applied to it and comprising mainly the following elements: a).- A work desktop (1) divided into two main zones: .- an "adaptive surface" (1.1 ) comprising a section of the desktop of dimensions (approximately 800 x 600 mm) facing the user and operated by a linear actuator using a mechanism enabling it to be inclined.

.- a general work surface (1.2),

.- motor-driven legs (1.7) to raise and lower the desktop (1 ) to different working heights,

.- A footrest tray (1.8), with different height and inclination possibilities, b).- A series of sensors integrated into the structure of the desktop and into the legs, particularly:

distance sensors (5)

presence sensors (6)

environmental noise sensors (7)

temperature sensors (8)

light sensors (9)

humidity sensors (10)

smoke-detector sensors (11 )

IR barrier leg sensors (12)

a radio-frequency receiver (NFC)

a row of LEDs (17)

- current and charge takeoffs (18).

.- a LED light-fitting (22) integrated into the desk. c).- a CPU unit with touch-screen (14). The desk (M) integrates a high-resolution touch- screen, presenting an interface to the user from which to control his or her personal data, adjust the desk elements, consult personal information to which the system has access (agenda, health data, information on events, etc.) and manage its configuration from the work station. It includes, among other elements, an on-screen keyboard, commands to activate the desk's mobile elements, graphs of activity, time planning and use statistics, the configuration of the user's personal parameters, joint information from several interconnected desks and information on other applications and functionalities external to the system which may be coordinated with it. d).- a hardware system allowing physical connection of the integrated sensors and linear actuators with a microcontroller (15), made up fundamentally of the following: d.1. distance sensors (5) permanently measuring the distance from the user to the table and combined together, to position the user relative to the working desktop. These distance measurements, made every few seconds, are sent to the server system for inclusion in its statistics. d.2. a presence sensor (6) used to detect when someone is using the table. The user's presence is detected with a thermopile sensor able to measure the temperature of an object placed in front of the sensor from the infrared radiation it emits as a result of its temperature. The presence data is used to detect when the user leaves the work station and when he returns to it. Also, at the start of the working day, the system detects the presence of a new user and asks him to log in. d.3. a light sensor (9) in the form of an ambient light sensor comprising two photodiodes, one broad spectrum and the other of red-infrared radiation which, using the signal they produce and depending on the amount of light they receive in the spectrum to which they are sensitive, can estimate the light output at the user's post, in units of lux. This ambient light level is monitored to gather data on the working environment and to make automatic adjustments to light sources such as a desk lamp integrated into the table. d.4. an environmental noise sensor (7), using a sound power meter, based on the signal from a microphone which is processed to calculate the sound power level in decibels using an appropriate calibration of the sensor. This measurement makes it possible to analyse the noise in the environment to obtain hourly, weekly statistics, etc. d.5. NFC (16): the desk (M) integrates an NFC radiofrequency receiver, making it possible to start a session in the system and complete actions, and which can be used with any NFC-enabled device such as contactless cards, intelligent telephones, coded keyholders, etc. In addition to performing actions (start of session, end of session, etc.) in the actual system in the invention, the authentication based on this system can be used to connect with other company register processes and to monitor work attendance or office arrivals. d.6. LEDs (17): the desk (M) integrates a set of LEDs which offer instantaneous data (low complexity) to the user on various parameters of his work. This information is displayed by varying the LED colour and brightness, the latter possibly dependent on the intensity of the ambient light. d.7. Current and charge takeoffs (18): the desk (M) integrates a series of mains current takeoffs, available to the user, and charge sockets designed to offer simple, wireless charging for any user portable electronic device. d.8. Infrared Leg Barriers (12) in the form of a set of IR barriers able, together or individually, to measure the position of legs and feet, to complete measurement of the user's working posture. d.9. A LED light-fitting (22) integrated into the desk and self-regulated depending on the ambient light and the user's preferences, and operated as follows:

Where dictated by the surrounding conditions - the ambient light - and user preferences, the system communicates via Bluetooth with the microcontroller (15) which runs the controller for the light-fitting incorporated, to change the light intensity. g) A server system which contains the software that organises the communication between all the other systems and which receives, stores, analyses and processes the data from each work station. The following architecture may be implemented: g.1. A mechanism to deliver and receive the data collected from the desk (M) to the servers, which operates as follows:

The microcontroller (15) used in the sensor system has software which provides a hardware abstraction layer (HAL) allowing the sensors to be started, consultation on their status and the disassociation of a given sensor from a high level, in terms of the multilayer architecture making up the technology of the table (M).

This software is implemented in a routine or daemon in the operating system of the microcontroller (15), with three functionalities:

.- To start the routine.

.- To stop the routine.

.- To consult the series of states of the sensors and to send these states to a remote server in the cloud (21) which receives and processes these states.

The cloud (21 ), is a elastic computer cloud with Application Programming Interface and relational data base

This information is formed into a measurement, and the action to collect the measurement and deliver it to the remote server is what is known as "to measure".

This routine remains inactive, at rest, until the presence of an individual is detected at the position for use of the desk (M).

At that point, the user measurement routine begins every given length of time.

These measurements are delivered and collected by the Server system (20) housed in the cloud (21). When these measurements are stored in the data base, they are linked to the identity of the user logged into the system, if their identity is known. If not, the measurements are stored temporarily, without identification, while the user is asked to complete the login process.

The user's interaction for their identification can take two forms:

The first is to start the session manually with a standard login system, by means of username and password. Manual session start is managed through the tactile device whose virtual keyboard enables a username and password to be introduced. This device is linked by Bluetooth to the microcontroller (15) at each work station, which is also able to handle a routine for reception and forwarding of messages. The device encapsulates the login data, communicating them to the microcontroller (15), which associates the measurements being taken on the user.

The second option is identification using a near-field communication card (NFC) where the session is started with a card using a reader connected to the microcontroller (15) which undertakes to communicate both to the Server system (20) via the Internet and to the tactile device at the post, by Bluetooth.

These measurements are communicated using the REST protocol ("Representational State Transfer") to the server system housed in the cloud (21 ). g.2. A data-processing mechanism operating as follows:

The server system (20) processes the data collected, assigning them a single timestamp while also linking those data to a single user known to the system.

After encapsulating the tuple (user, timestamp) along with the measurement data, it is stored in the data base.

Erroneous measurements are discarded in this process.

The data base is deployed in an external server (20). An interface is used for the permanence of the data between server system and data base.

Every certain period of time, all the measurements taken on a user are consulted and the data analysed, a process is run to detect anomalies, prior to conclusions and making pertinent decisions, which are then forwarded to the user. g.3. A mechanism for delivery of actions from the servers (20) to the desk (M), which operates as follows:

When the system decides to run an action on the table (M), depending on the type of action, the server (20) in the cloud must deliver it to the microcontroller (15) or to the touch-screen (14) where the native application is found. An example of the first type of action is to tip the adaptive surface, while the second type includes the reprogramming of a user's programmes. In both cases, the standard REST protocol is used for data exchange. h) An algorithmic system for decision-making and the generation of recommendations in real time, using artificial intelligence and machine learning techniques. The system proceeds on the basis of the following ideas:

The system learns from users, by summarising the activity and patterns of each, with a statistical model stored and permanently updated over time.

Initially, use is made of parametric models to define each user's activity by means of a family of probabilistic distributions indexed by one or more parameters. Six are used in the first instance.

The value of those parameters is adjusted for each user to values best representing them and so leading to improved service for them.

The system designs daily work programmes for each user based on the current value of that user's parameters.

The programmes relates to a comprehensive specification of the activity to be carried during a number of hours (or the full day) and are generated stochastically, i.e. two users with identical parameters will receive different programmes, and likewise, one user (assuming that the value of their parameters hasn't changed from one day to another) will receive different programmes on consecutive days. The value of the randomness in the programmes lies in the fact that if a body becomes accustomed to a fixed work dynamic, that dynamic may become partly ineffective, so that it is preferable to introduce same random variation.

Three aspects are taken into account in generating the programmes: In the first place, events in the person's schedule away from their work table. During the time for these events other activities are not programmed.

Secondly, expert Ergonomics rules of know-how are introduced, e.g. where a person's daily productivity is substantially improved if they take a 5 minute break for each hour worked.

Thirdly, the particular statistical model representing that user. In line with that model and the person's availability in time during that day, the periods are defined in which they will work while standing, seated ...

As already explained, the programme specifies all the activity to be carried on at every moment of the day. Many things may however change during the course of the day. From the user's own schedule - new meetings, cancellation of planned meetings - to the detection of anomalous conduct and the updating of the models. Thus the programme is updated while being run.

At the end of each event in the programme, the user is told which event follows. Should they wish to make the transition, that goes ahead. If on the other hand the user prefers to continue what he or she was doing, or perform some other action, the programme adjusts and the models are updated according to that conduct - using a standard temporal decay for the impact of the actions, because users are not stationary; their patterns of conduct may change over time following more or less lengthy periods. k) An interactive software application allowing the user access to all the table's functionalities and statistics. It also allows the system to transmit to the user its recommendations in real time, along with the different events on their schedule, and operates as follows:

The tactile device serves as platform and interface for the two-way communication and the interaction between user and system. On the one hand, the system proposes actions to the user via the interactive application, and gathers and processes the user's responses to those proposals.

On the other hand, the user can ask the application to complete certain physical actions (to raise or lower the legs or the adaptive surface), and for statistics on the system's use, or to modify their personal configuration. The user can also ask through the tactile device to be assigned a working day schedule. In addition, it can supervise, modify or close it from the interactive application. With the information from their agenda, the measurements collected and the feedback received by the user in the previous planning, a work routine is programmed in the learning system and is returned to the control of the work station which displays it onscreen. This undertakes to handle the times of change of posture, break times, notify meetings, etc. When the time comes for an event, it is notified by one of the tactile, light or vibration interface systems, and the user must choose one of the options offered to it via the tactile system (non-response understood as a possible user option).

Should an event mean a change in the physical system of the desk (M) - like to raise or lower the legs or alter the slope of the adaptive surface - the tactile system communicates by Bluetooth with the microcontroller (15) and this handles the physical controllers for the changes of position, height or light intensity.

There are events which are not programmed in the routine, e.g. detection of an incorrect posture or an anomaly detected by the sensors. In this case, the microcontroller (15) is responsible for detecting it, communicating it immediately to the server system which consults the learning system, returning the decision made and the actions for implementation or for suggestion to the user to the microcontroller (15) or to the interactive application.

Thus, in technological terms, this embodiment of the invention comprises an office desk controlled by a computer system which receives data about the user and the work surroundings as inputs and returns as outputs recommendations to the user, automatic implementation of actions on them, and statistics the user can consult.

The input data are from three different sources:

.- data gathered by the table sensors,

.- data gathered by user's own interaction with the built-in application and,

.- finally, data that the system reads from other applications external to the system, such as agenda schedules, job data bases or devices external to the system.

There are several types of output:

.- in the first place, and in line with statistical models describing a specific user of the table, this delivers specific proposals to the user in the form of a daily schedule. The proposals include periods of work standing, sitting, rest periods or breaks and changes to the adaptive surface slope.

.- secondly, the table sometimes does not ask, rather implementing actions directly. m) An algorithmic system for learning and recommendations for collaboration. The desk and its sensors are the instrument the system uses to monitor and gather data continuously and precisely, and the fact that the office has several desks implies that the data stored will be more comprehensive and powerful. The system is able to learn metrics on user communication and team work. Because each desk has presence sensors and an NFC sensor, the system is able to trace the approximate routes taken daily by the users in the office - detecting them as they approach each work station, even if not logged-in - so that statistical models can be used to interpret the level of communication among users.

The system uses clustering algorithms based on graphs with weights to propose daily where it would be useful for each user to sit. It must be noted that the proposal is not necessarily a specific spot at a desk but may be a desk or a set of desks nearby. Additional information used for these purposes is extracted from calendars, including meetings for that day, and which users will be at each meeting. The algorithms also take account of metrics such as the centrality of a vertex in a graph, and attempt to minimise the average distance of users who tend to move more or create more movements.