MEASURING STATION WITH WELDING MEASUREMENT

Description

Domaine technique

[0001] This description relates to the monitoring of a user's health and more specifically to measurement stations enabling the implementation of one or more measurements of a user's biometric signals (or physiological parameters).

[0002] At least one of the following data is determined by the measuring station of this application: weight or mass, electrocardiogram (ECG), impedance measurement (human body impedance analysis), including impedance-plethysmogram (IPG), impedance-cardiogram (ICG) and bioimpedance (“ bioimpedance analysis » BIA, for fat mass, water mass, muscle mass, etc.), photoplethysmogram (PPG), ballistocardiogram (BCG), electrochemical conductance analysis of the skin ( ESC analysis " For " electrochemical skin conductance or more simply "ESC" in this description) and evaluation of sweat function (sometimes called " sudogramme in the present request), heart rate ( heart rate ", HR), pulse wave velocity pulse wave velocity (" pulse wave velocity », PWV), etc. Etat de la technique

[0003] The 2010 document WO2010 / 122252 describes a connected scale with weight and bioimpedance measurement. The 2015 documents EP3087914 and EP3095380 describe a connected scale that provides information on the user's cardiovascular status, including a PTT measurement (" pulse transit time using a BCG and an IPG. Document WO2021 / 164561 describes a balance with a handle for measuring weight, performing a multi-lead ECG, and performing a segmental BIA. Document WO 2020 / 081472 describes a balance-type measuring station comprising plantar electrodes arranged in left and right groups, enabling, in particular, the performance of body impedance measurements, such as IPG by alternating current injection.

[0004] The development of new measurement devices that can be used at home is desirable. Présentation de l'invention

[0005] This description aims to propose a measurement station enabling the acquisition of various biometric signal measurements, with increased quality.

[0006] The invention is defined in the claims.

[0007] In one embodiment, the description presents a measuring station comprising: a left group of electrodes, comprising at least two electrically independent electrodes arranged to be in contact with the underside of a user's left foot, a right group of electrodes, comprising at least two electrically independent electrodes arranged to be in contact with the underside of a user's right foot, a DC voltage source, a switch configured to activate and deactivate a so-called DC configuration, referred to as the DC configuration, in which at least one electrode, referred to as the active electrode, of at least one group of electrodes is connected to the DC voltage source.

[0008] In particular, one electrode of each group is connected to the DC voltage source (at its two opposite terminals). One group functions as the cathode and the other group functions as the anode.

[0009] In one embodiment, in a DC configuration, at least one electrode, called the passive electrode, of an electrode group is not connected to the DC voltage source. The passive electrode may be an electrode connected with a high impedance, for example, greater than 500 kΩ. In another variant, at least one electrode of each electrode group is not connected to the DC voltage source.

[0010] In one embodiment, the measuring station further includes an AC power source, and the switch is configured to selectively activate or deactivate an AC configuration (AC configuration, ACs, ACf, ACb), in which at least one electrode from the left electrode group and the right electrode group is connected to the AC power source. The switch is configured to switch at least between the DC and AC configurations. The DC and AC configurations cannot be activated simultaneously. The AC configuration allows for BIA (between the legs, and segmental with a handle), IPG between the legs, and IPG in the foot.

[0011] In one embodiment, in an AC configuration (ACf, ACb), the switch is configured to connect at least two electrodes from the left electrode group and the right electrode group to the terminals of the AC power source. This arrangement allows for BIA between the legs, IPG between the legs, and IPG in the foot. The switch is further configured to connect at least two electrodes from the left electrode group and the right electrode group to the terminals of a voltmeter.

[0012] In one embodiment, in an AC configuration (ACb), the switch is configured to connect at least one electrode from the left group and at least one electrode from the right group to the terminals of the AC power source. This arrangement allows for BIA (Bilateral Interference Assessment) and IPG (Internal Penetration of the Legs) testing. The switch is further configured to connect at least one electrode from the left group and at least one electrode from the right group to the terminals of the voltmeter.

[0013] In one embodiment, in AC configuration (ACf), the switch is configured to connect at least one electrode of a group to one terminal of the current source and another electrode of the same group to a different terminal of the current source. This arrangement allows for IPG (interference with the ground) in the foot. The switch is further configured to connect at least two electrodes of the same group to the terminals of a voltmeter. In particular, the two electrodes connected to the voltmeter are not adjacent.

[0014] In one embodiment, the left group (LG) and / or the right group (RG) each comprises three electrically independent electrodes, and, in DC configuration, the switch is configured to connect at least two electrodes of the left group (LG) and / or at least two electrodes of the right group (RG) to the DC voltage source.

[0015] In one embodiment, the left group (LG) and / or the right group (RG) each comprises four electrically independent electrodes, and, in DC configuration, the switch is configured to connect at least three electrodes of the left group and / or at least three electrodes of the right group to the DC voltage source.

[0016] In one embodiment, the left group (LG) and / or the right group (RG) each comprises five electrically independent electrodes, and, in DC configuration, the switch is configured to connect at least four electrodes of the left group (LG) and / or at least four electrodes of the right group (RG) to the DC voltage source.

[0017] In one embodiment, the left group (LG) and / or the right group (RD) each comprises at least six electrically independent electrodes, and, in the DC configuration, the switch is configured to connect at least five electrodes of the left group (LG) and / or at least five electrodes of the right group (RD) to the DC voltage source. In the AC configuration, at least two inactive electrodes may be located between the two electrodes connected to the voltmeter. One of these inactive electrodes in the AC configuration may be the passive electrode in the DC configuration.

[0018] In one embodiment, the left group (LG) and / or the right group (RG) each comprises at least seven electrically independent electrodes, and, in the DC configuration, the switch is configured to connect at least six electrodes of the left group (LG) and / or at least six electrodes of the right group (RG) to the DC voltage source. In the AC configuration, at least three inactive electrodes may be located between the two electrodes connected to the voltmeter; one of these inactive electrodes may be the passive electrode in the DC configuration.

[0019] In one embodiment, in CC configuration, the passive electrode is located between two active electrodes.

[0020] In one embodiment, the electrodes are arranged side by side, spaced apart from each other, along the length of the measuring station.

[0021] In one embodiment, the electrodes are in the form of parallel strips.

[0022] In one embodiment, the electrodes are spaced apart along the length of the measuring station. This helps to limit the effects of fore / aft foot placement. In another embodiment, the outermost electrodes along the length are wider to further limit the effects of foot placement along the length.

[0023] In one embodiment, the electrodes configured to be active in DC configuration have a dimension in the direction of a length of the measuring station that is equal to or greater than that of the electrodes configured to be passive in DC configuration.

[0024] In one embodiment, for a right or left group of electrodes, the electrodes configured to be active in the DC configuration cover at least 50% of the surface area (Se) of the convex hull defined by all the electrodes in the group. Alternatively or complementaryly, the distance (Dmax) between the extremity electrodes, including the electrodes themselves, along a length of the measuring station is at least 20 cm. Alternatively or complementaryly, the electrodes extend over a width of the station of at least 10 cm, or even at least 15 cm. This helps to limit the effects of lateral foot placement.

[0025] In one embodiment, the electrodes of the left group extend along a width of the measuring station over more than 40% of the width of the measuring station and the electrodes of the right group extend along a width of the measuring station over more than 40% of the width of the measuring station.

[0026] In one embodiment, the electrodes comprise an indium tin oxide material, ITO.

[0027] In one embodiment, the DC voltage source is configured to selectively apply successive constant voltage steps to a pair of electrodes, referred to as active electrodes, with the electrodes of the pair constituting an anode and a cathode. The voltage values ​​of the successive steps may be decreasing (i.e., each step has a voltage value lower than that of the preceding step) and / or last between 500 ms and 2 s each.

[0028] In one embodiment, the measuring station according to any one of the preceding claims, further comprising a weight sensor.

[0029] In one embodiment, the measuring station comprises a base including the left electrode group and the right electrode group, and includes a handle with at least one electrode suitable for hand contact. In DC configuration, the switch is configured to connect the handle electrode to a high impedance. In particular, the switch can be configured to connect all the base electrodes to the terminals of the DC voltage source.

[0030] In one embodiment, the electrodes of the left and right group comprise an indium tin oxide material, ITO.

[0031] The description also presents a measuring station comprising: at least one pair of electrodes comprising an indium tin oxide (ITO) material, a DC voltage source configured to selectively apply DC voltage steps to the pair of electrodes, referred to as the active electrodes, said electrodes of the pair constituting an anode and a cathode. This measuring station can perform an ESC.

[0032] The description also presents, in one embodiment, a measuring station comprising: a base capable of receiving at least one user's foot, a handle capable of receiving at least one user's hand, a cable connecting the base to the handle, wherein the handle includes a handle master switch configured to alternate between an electrocardiogram position and an impedance measurement position and the base includes a master switch configured to alternate between an electrocardiogram position and an impedance measurement position.

[0033] In one embodiment, the handle comprises four electrodes, each electrode being connected to a switch for connecting said electrode to an electrocardiogram (ECG) circuit or an impedance measurement circuit, the ECG circuit and the impedance measurement circuit being connected to the master switch. The four electrodes allow the handle to perform a BIA measurement (including segmental) and an ECG.

[0034] In one embodiment, the electrocardiogram electrical circuit and the impedance measurement electrical circuit allow the electrical signals to be processed before they pass through the cable.

[0035] The description also presents a method of measurement (e.g. ESC acquisition) using a station as described previously, the method including a switching step, using the switch, between two different configurations. Description des figures

[0036] The following figures illustrate the elements described in this description. . FIG. 1 : there figure 1 represents a three-dimensional view of a measuring station with a handle, according to one embodiment; . FIG. 2 : there figure 2 represents a side view of the station figure 1 ; . FIG. 3 : there figure 3 represents a three-dimensional view of the station of the figure 1 , but with the handle in the deployed position; . FIG. 4 : there figure 4 represents a detailed view of the handle; . FIG. 5 : there figure 5 represents a schematic view of the measuring station and its environment; . FIG. 6 : there figure 6 illustrates a three-dimensional view of an isolated measuring plate; FIG. 7 : there figure 7 illustrates a view from below the measuring plate of the figure 6 ; . FIG 8 : there figure 8 represents a schematic view of the components of the measurement station, notably for performing an ESC; . FIG. 9 : there figure 9 represents an electrode arrangement with two independent electrodes per left or right group of electrodes; . FIG. 10 : there figure 10 represents an electrode arrangement with three independent electrodes per left or right group of electrodes; . FIG. 11 : there figure 11 represents an electrode arrangement with four independent electrodes per left or right group of electrodes; . FIG. 12 : there figure 12 represents an electrode arrangement with five independent electrodes per left or right group of electrodes; . FIG. 13 : there figure 13 represents an electrode arrangement with six independent electrodes per left or right group of electrodes; . FIG. 14 : there figure 14 represents an electrode arrangement with seven independent electrodes per left or right group of electrodes; . FIG. 15 : there figure 15 represents an electrode arrangement with larger extreme electrodes; . FIG. 16 : there figure 16 illustrates a diagram showing part of the switch; . FIG 17 : 16 illustrates a diagram showing part of the switch, specifically in the handle; . FIG. 18 . : there figure 18 illustrates a plurality of alternative configurations that the measurement station can take, notably thanks to the switch of figure 16 Or 17 ; . FIG : 19 : there figure 19 illustrates a configuration selection process. Description détaillée

[0037] . THE figures 1 à 4 These figures illustrate a representation of a measuring station 100 according to at least one embodiment of this description. The measuring station 100 is primarily in the form of a base 102 on which a user can place their feet, for example, flat. The user can be on the measuring station or seated in a chair. In the normal operating position, the user's feet are placed flat on the measuring station 100. The thickness of the base 102 is, for example, less than 10 cm, or even 6 cm. The measuring station 100 includes one or more sensors 104 capable of measuring a user's physiological information.

[0038] In one embodiment, certain sensors 104 (for example, electrodes) are mounted on a substrate 106 of the base 102, the substrate being configured to receive the feet of a user. The substrate can be a rigid plate, as illustrated in the figures, and referred to as the measuring plate 106. The measuring plate 106 defines a plane parallel to an XY plane. The measuring plate 106 can be made of glass. However, the substrate can be deformable under the weight of the user. The substrate 106 can be mounted on a base 108, for example, a rigid one, or on feet (not shown). In the case of a base 102 functioning as a bathroom scale, sensors are positioned between the substrate 106 and the base 108 (a so-called "sandwich" architecture) or between the substrate 106 and the feet (a so-called "feet" architecture). The sensors can be load cells (usually four) which allow us to obtain a weight, and therefore a mass of a user.The base 108 can be made of metal (aluminum, steel, etc.) or plastic.

[0039] As seen in figure 2 The measuring station 100 also includes a support plate 202, which can be attached to the measuring plate 106. The support plate 202 is designed to receive part of the electronics of the measuring station 100, notably via a printed circuit board (PCB) (" printed circuit board " mounted on the support plate 202. The support plate 202 is therefore positioned between the base 108 and the measuring plate 106.

[0040] In a pedestal architecture, two groups are defined as moving relative to each other: the feet (fixed group) and everything else (mobile group). Load cells mechanically connect these two groups. The support plate, if present, is then generally hidden by an external cover attached to the measuring plate. Visually, only the moving part is usually visible.

[0041] In a sandwich structure, two groups are defined as moving relative to each other: the base 108 (and associated elements) on one hand (fixed group), and everything else on the other (mobile group). Load cells mechanically connect these two groups. Visually, both groups are generally visible.

[0042] In one embodiment, the measuring station 100 further includes a handle 110, suitable for being gripped by at least one hand of the user, illustrated in figures 3 And4 The 110 handle can be connected to the measuring station by a 302 cable (visible on the figure 3 ). In order to have a practical and cable-free measuring station 100, the cable 302 can extend and retract (e.g., wind and unwind) inside the base 102. For this purpose, a reel (not visible in the figures) is arranged in a space provided between the substrate 106 and the base 108. At least two positions are thus defined for the handle: a stowed position (visible in figures 1 And 2 ) and a deployed position (visible in figure 3 The base 102 also includes a handle support 112 which can accommodate the handle 110 in its stowed position. The handle support 112 is, for example, mounted on the substrate 106. It will be described in more detail later. The handle 110 also includes at least one sensor 402.

[0043] The 110 handle is used to perform at least one of the following measurements: ECG (1-channel ECG between both hands or multi-channel ECG with other limbs), BIA (also known as "segmental"), IPG, and possibly ESC. The sensors for the 110 handle are selected from among the following: optical sensor for PPG and electrodes.

[0044] Base 102 may include a display 114 (for example, a screen or an LED or e-ink display) to show information to the user. The display 114 is shown as a dotted line on the figure 1 because, in the example of the figures, it is not or barely visible when it is switched off.

[0045] The base 108 of the base 102 may include a chamfer 204 to facilitate gripping the measuring station 100 when it is on the ground.

[0046] In one embodiment, the base 102 has an essentially rectangular shape in an XY plane. The base 102, for example, has an essentially parallelepiped shape in XYZ space.

[0047] When the measuring station 100 is positioned flat, the measuring plate 106 is parallel to an XY plane. The measuring station 100 has a longitudinal dimension in an XY plane and a transverse dimension in an XY plane orthogonal to the longitudinal direction. Height refers to the dimension along the Z-axis (also called thickness); width refers to the transverse dimension along the X-axis; and length refers to the longitudinal dimension along the Y-axis. In normal use, the user's feet are positioned along the Y-length of the base 102.The edge of measuring station 110 (or base 102, or measuring plate 106) that is closest to the front of the foot in normal use (i.e., the toes) is called the anterior edge, and the opposite edge of measuring station 110 (or base 102, or measuring plate 106), that is closest to the back of the foot in normal use (i.e., the heel), is called the posterior edge. A median axis can be defined, along the length Y (longitudinal), around which measuring plate 106 is symmetrical, allowing us to define a left section, intended for the left foot, and a right section, intended for the right foot. The width X102 of the base 102 can be between 330 and 400mm (for example about 357mm) and the length of the base Y102 can be between 300 and 360mm (for example about 325mm).The length and / or width of the measuring plate 106 may be slightly less than those of the base 108, so that the measuring plate 106 is slightly recessed relative to the base 108. In this case, the length and width of the base 108 correspond respectively to the length and width given above for the base 102. Such a design protects the measuring plate 106 from impacts and contact with the external environment. French application FR2106653, incorporated by reference, describes such a solution.

[0048] Specifically, as illustrated in figure 2 The height H102 of the base 102 can be between 20 and 35 mm (for example, between 35 and 40 mm), and the maximum height H100 of the measuring station 100 can be between 45 and 55 mm (for example, 51 mm). As illustrated in the figures, only the handle support 112 and the handle 110 protrude in the Z direction relative to the measuring plate 106. In detail, the height Z108 of the base 108 can be between 10 and 20 mm (for example, 18 mm), the height Z202 of the support plate 202 can be between 3 and 6 mm (for example, 4 mm), and the height Z106 of the measuring plate 106 can be between 4 and 8 mm (for example, 6 mm).

[0049] The 302 cable can have a length between 50cm and 120cm. The length is chosen so that most users can grip the handle while standing with their hands downwards (at rest).

[0050] The measuring station 100 could, however, have different shapes and / or dimensions, provided that the shape and / or dimensions allow for obtaining the measurements described herein. In particular, the base 102 could have an oval or more rounded shape in the XY plane.

[0051] The measuring station 100 can have a mass between 3 and 6 kg (for example between 4 and 5 kg).

[0052] Thanks to the sensor(s) on the base 102 and / or the sensor(s) on the handle 110, the measuring station 100 can perform a series of measurements on the user. Specifically, the sensors 104 used include electrodes formed from electrically conductive paths mounted on the substrate 106 and / or the handle 110 (metal inserts, metal deposits, etc.). Some measurements may require only sensors on the base 102, other measurements may require only sensors on the handle 110, and still other measurements may require both sensors on the handle 110 and the base 102.

[0053] The measuring station 100 can thus perform an ECG using the handle 110 (e.g., a 1-lead ECG), or an ECG using the handle 110 and the base 102 (e.g., a multi-lead ECG, such as a six-lead ECG). The measuring station 100 can thus perform a body impedance analysis (BIA) using the handle 110 and / or the base (BIA between the legs and / or segmental BIA). The measuring station can thus perform an IPG in the leg arch (" between legs " or IPG in the foot (" in the foot ".

[0054] The sensors may include electrodes capable of measuring and / or applying a voltage (DC or AC) and / or a potential (DC or AC), and / or injecting and / or receiving a current (DC or AC). The functions of these electrodes may be selected from the following list: i+ and i-, for injecting AC current into a user's body; V+ and V-, for measuring a potential difference in a user's body; RA, LA, and LL, for measuring an electric current flowing through a user's body; sudo_cath and sudo_an, for measuring skin conductivity; and sudo_HiZ, for fixing a user's body to a given impedance. Electrodes i+ and i-, V+ and V- are used for a BIA, IPG, or ICG; electrodes RA, LL, and LL are used for an ECG. The sudo_cath, sudo_an and sudo_HiZ electrodes are used for an ESC.

[0055] In particular, measuring station 100 is configured to perform various measurements. As the number of electrodes is limited (due to surface area and quantity considerations), measuring station 100 features a specific electrode arrangement with a switch.

[0056] As previously mentioned, the sensors may include load cells, through which the measuring station 100 can measure a weight and perform a BCG.

[0057] The 110 handle is illustrated in detail in figure 4 The 110 handle allows the 100 measuring station to perform a wider variety of measurements or more comprehensive measurements, thanks to an electrical connection with at least one hand, or even both hands. In particular, segmental BIA and / or multi-channel ECG are made possible by adding the 110 handle to the 102 base. The 402 sensors of the 110 handle include, for example, electrodes capable of measuring and / or applying voltage and / or potential and / or injecting and / or receiving current.

[0058] In one embodiment, the handle 110 comprises four electrodes, arranged in two pairs: one pair for the left hand and one pair for the right hand. For this purpose, the electrodes of the handle are designated as: electrodes LH1, LH2, side by side on a left portion of the handle 110, and electrodes RH1, RH2, side by side on a right portion of the handle (by left and right portions, respectively, is understood the part of the handle intended to be in contact with the left and right hands, respectively). "Side by side" here means with a space between the electrodes to isolate them from one another. The electrodes are therefore arranged end to end between two ends of the handle 110. When the handle 110 is straight, the electrodes are arranged end to end along the main direction of the handle 110.Electrodes LH1 and RH1 are positioned axially on one end of the handle; electrodes LH2 and RH2 are positioned axially on the center of the handle. Therefore, the electrodes are, in order: LH1, LH2, RH2, RH1.

[0059] In one embodiment, the sensors 402 of the handle 110, when used as electrodes, are implemented as several metallic inserts within the handle 110. Materials suitable for these metallic inserts include stainless steel, titanium, brass, ITO (indium tin oxide), nickel (or nickel alloy), or conductive plastics. For signal processing and / or acquisition, particularly of ECG signals, the handle 110 may incorporate processing electronics (amplifier, etc.), specifically for ECG and / or impedance analysis. It is generally preferable to amplify the signal as close as possible to the electrodes, as the cable can pick up ambient noise.

[0060] . There figure 5 illustrates a schematic view of the overall architecture 500 into which the measuring station 100 can be inserted. This overall architecture forms a system comprising the measuring station 100. In particular, the measuring station 100 can communicate with third-party devices via a communication network 510, which is, for example, a wireless network (specifically, a network compatible with at least one of the following communication protocols: Bluetooth, Wi-Fi, Ethernet, etc.). The third-party devices may include a server 520 and a mobile terminal 530 (smartphone, etc.). The server 520 may include control circuitry 522, including a processor 524 and memory 526, and an input / output interface (“ input / output ", I / O) 528, which allows the control circuitry to receive and send data to the communication network 510. The mobile terminal 530 may include control circuitry 532, including a processor 234 and a memory 236, and include an input / output interface (" input / output (I / O) 538, which allows the control circuitry to receive and send data. Server 520 is a remote server, for example located in a data center ( data center (in English). The 530 mobile terminal also includes a 540 user interface ( user interface The user interface (UI) is configured to display information to the user and allow them to enter information (such as height, gender, etc.) if necessary. Specifically, the control circuitry 532 is configured to run an application managing the environment of the measurement station 100. The mobile terminal 530 is a personal item belonging to the user, typically kept close to them.

[0061] The measuring station 100 can communicate with the server 520 and / or the mobile terminal 530. In one embodiment, the measuring station 100 can communicate directly with the mobile terminal 530, for example, via Bluetooth or Bluetooth Low Emission (BLE). This communication can be implemented during the installation of the measuring device 100, in particular to pair it with the mobile terminal 530 and / or to configure a connection to the server 520 that does not go through the mobile terminal 530 and / or as a backup in case of a failed communication with the server 520. In another embodiment, the measuring station 100 can communicate directly with the server 520, without going through the mobile terminal 530. This communication allows the user to use the measuring station even without having their mobile terminal 530 nearby.

[0062] The measuring station 100 also includes a control circuit 550 with a processor 552 and a memory 554, and an input / output interface (“ input / output I / O) 556, which notably allows the control circuitry to receive and send data to the communication network 510. The processor 552 is configured to process data obtained by the sensors 104. In particular, the processor 552 can execute instructions from a program stored in memory 554. The control circuitry 550 may include a microcontroller, which integrates the processor 552, memory 554, and input / output interface 556. The control circuitry 550 may further include an analog front-end device ( Analog Front End », AFE). The 550 control circuitry may also include an analog-to-digital converter ( Analog to Digital Converters ", ADC). The measuring station 100 includes a voltage source (e.g., DC) 558 and a current source 560 (e.g., AC). The measuring station 100 also includes a voltmeter 562 (or any system capable of measuring voltage). The voltmeter 562 can be integrated into the AFE. The current source 560 can be integrated into the AFE, and the voltage source 558 can be integrated into the microcontroller MCU (e.g., via a digital-to-analog converter, " digital to analog converter » DAC). Some 104 sensors (in particular the 402 sensors of the 110 handle of the figure 4 or the 602 electrodes of base 102 on the figure 6 ) are connected to the control circuitry 550 (for example, to the MCU or the AFE). The measurement station 100 includes a battery 564, capable of supplying power to the various components of the measurement station 100.

[0063] The 550 control circuitry and other electronic components can be mounted on a printed circuit board (PCB) (“ printed circuit board "), for example, attached to the support plate 202. Connectors link the electrical conductive paths from the measuring plate to the PCB. In order to be able to change the electrode connections to the various components of the measuring station 100, the measuring station includes a switch 566. The switch 566, which can include a plurality of switches driven by the MCU, will be described in more detail later).

[0064] The 550 control circuitry includes, for example, an ECG acquisition system, an impedance measurement system (for BIA or IPG), and an ESC system (for ESC). For each of these systems, different components of the measurement station 100 are used. For example, the ECG acquisition system includes electrodes (represented by 602 on the diagram). figure 6 and 402 on the figure 4 ) and an ECG 568 electrical circuit (which notably integrates various amplification and / or filtering stages and a demodulator); the impedance measurement system notably includes electrodes (represented by 602 on the figure 6 and 402 on the figure 4 The ESC system comprises electrodes, the current source 560, the voltmeter 562, and an impedance measurement circuit 570 that connects the electrodes to the current source and the voltmeter (which incorporates various amplification and / or filtering stages). The ESC system includes electrodes, the voltage source 558, and an ESC circuit 572 (which incorporates various electronic components, including resistors). The switch 566 allows the electrodes to be connected to the various circuits 568, 570, and 572 mentioned above, or to be disconnected from all the electrodes of the control circuitry 550.

[0065] The 550 control circuitry is essentially located in the base 102, with the exception of a few components (amplification, filtering and switches) arranged in a PCB in the handle 110, to process the signals before passing them through the cable 302.

[0066] As mentioned previously, the 100 measurement station also includes a display 114, such as a screen (OLED / PMOLED, Retina, etc.), to show information to the user. Alternatively, the 100 measurement station does not include a display.

[0067] In one embodiment, the sensors 104 include electrically conductive paths 602 (called "electrodes") on the base 102 (see in particular figures 6 And 7The electrodes 602 can be in the form of a metallic deposit on an upper face 604 of the measuring plate 106. The upper face 604 of the measuring plate 106 is defined as the face that receives the user's feet (the visible outer face). To ensure electrical connection with the PCB, the electrodes 602 pass through an edge of the measuring plate 106 and extend to a lower face 702 of the measuring plate 106. The edge (or edges) of the measuring plate 106 can have a rounded shape to ensure proper metallic deposition and electrical continuity. Furthermore, a rounded edge helps prevent injury when gripping the measuring station 100. "Rounded" means an arc or similar shape. The rounded edge also simplifies the metallic deposition during manufacturing.Application FR2106653, incorporated by reference, describes in detail these electrically conductive paths.

[0068] The electrodes 602 are connected to the PCB via a connector, which allows the connection between the electrical conduction path on the underside 702 and the PCB mounted on the support plate 202. The switch 566 allows the electrodes to be connected and disconnected from the various systems (ECG acquisition system, impedance measurement system, ESC system, etc.). In this way, each electrode can have several different functions depending on the switching position of the switch 566. The switch 556, for example, includes a plurality of switches controlled by the MCU.

[0069] The upper face 604 of the base 102 comprises a left group LG of electrodes (intended to be in contact with the left foot) and a right group RG of electrodes intended to be in contact with the right foot. When the base 102 is positioned under normal operating conditions, the user places their feet on a left side of the scale and a right side of the scale (with their toes on the display side 114). figures 6 And 7 represent electrically conductive paths L1, L3, L5, L7, L9, L11, L13, L15, L17 which form the electrodes of the left group LG of electrodes and electrically conductive paths R2, R4, R6, R8, R10, R12, R14, R16, R18, which form the electrodes of the right group RG of electrodes.

[0070] . The 602 electrodes can take the form of bands parallel to each other along the X direction (the bands extend along the X width of the 102 base).

[0071] In the illustrated architecture, the pairs of electrically conductive paths L1 and L3; L15 and L17; R2 and R4; R16 and R18 are not independent but are permanently electrically connected, so that the base 102 effectively comprises seven independent electrodes in the left group LG and seven independent electrodes in the right group RG. These permanent electrical connections can be made via the electrically conductive paths on the measuring plate 106 (for example, on the underside 702, not shown) or via the PCB of the measuring station 100.

[0072] . In one example, the electrically conductive paths of the upper face 604 corresponding to the electrodes 1301-1312 have a dimension (on the upper face 604) along the length Y of between 1.5cm and 2cm (for example 1.7cm); the spacing between two bands can be between 0.5cm and 1cm (for example 0.85cm); the electrodes can have a dimension along the width X greater than 10cm.

[0073] In particular, each LG, RG group may include at least four independent electrodes, notably to perform an IPG in the foot (two electrodes connected to the AC power source 560 and two electrodes connected to the voltmeter 562). In another embodiment, each LR, RG group may include at least two independent electrodes (to perform an ESC with an anode / cathode and a high-impedance electrode, or to perform a BIA or an IPG between the legs), or three independent electrodes.

[0074] In one embodiment, the measuring station 100 comprises a plurality of conductive surfaces (the electrically conductive paths described above) for measuring skin conductance (ESC measurement, notably for performing an ESC), particularly that of the skin under the feet. On the figure 6 These conductive surfaces take the form of parallel bands L1 to L17 and R2 to R18. In particular, the 102 base comprises two groups of electrically conductive paths (also called electrodes): a first group of electrodes LG, which is positioned on the left side of the 102 base during normal use (called the left group, but this term should not be interpreted restrictively to a left foot only), and a second group of electrodes RD, which is positioned on the right side of the 102 base during normal use (called the right group, but this term should not be interpreted restrictively to a left foot only). In particular, a user could mount the 102 base upside down (left foot on the right group RG and right foot on the left group LG). figures 1 And 6illustrate an example of an embodiment of the right and left groups LG, RG. The two groups of electrodes LG, RG are spaced apart from each other by a distance of, for example, between 0.1cm and 0.5cm.

[0075] The left (RG) and right (RD) electrode groups are formed by electrodes mounted on the measuring plate 106. (See simplified diagram 800 of the...) figure 8 Four electrodes are shown: electrodes 801 and 803 for the left group LG and electrodes 802 and 804 for the right group RG. The RG and LG groups may include more electrodes, as described later.

[0076] Unless explicitly stated otherwise by the handle, all the characteristics specific to the measurement of sweat activity can be carried out with the measuring station 100 comprising only the base 102. We will therefore refer to it as measuring station 100 or base 102 interchangeably.

[0077] The left and right electrode groups LG and RG allow for ESC measurement, that is, measurement of sweat activity in the feet. Documents WO2006 / 136598, WO2008 / 107324, WO2013 / 075963, WO2014 / 033105, WO2015 / 036530, and WO2016 / 083432 describe a system for performing ESC. The reader is referred to these documents for the theory and physiological principles.

[0078] The measuring station 100 (base 102) includes an ESC system capable of measuring the electrochemical conductance of the skin to assess its sweating function. Specifically, the ESC system includes a continuous excitation source 806 (for example, the voltage source 528 that generates a DC voltage or a DC voltage generator), suitable for generating DC voltage signals and, in particular, constant voltage steps. Each voltage step can last between 0.2 s and 5 s. The voltage delivered by the DC voltage source is, for example, between 0 and 10 V, or even between 0 and 4 V.

[0079] The DC voltage source 806 is connected to electrodes 801 through 804 via switch 566, allowing the electrodes to be connected or disconnected from the DC voltage source 806. In the case of an ESC, electrodes 801 through 804 are connected in pairs to the DC voltage source 806 to function as anode and cathode, respectively. Specifically, one electrode from each group LG, RG is connected to the terminals (or pole, for a source) of the source 806 to form an anode-cathode pair (for example, electrode 801 as the anode and electrode 802 as the cathode). Two electrodes from the same group LG, RG can be connected to the same pole of the source 802 (for example, electrodes 801 and 803 as the anode and electrodes 801 and 804 as the cathode).

[0080] In this description, it is possible to reverse the polarities, for example with switch 566 or via the voltage generator 806 itself, so that the anode and cathode are reversible. Therefore, when it is stated that a first electrode is connected to the cathode and a second electrode is connected to the anode, it is also indicated that the anode and cathode can be reversed.

[0081] The measuring station 100 further includes a control unit 810 (e.g., the MCU), capable of controlling the DC voltage source 806 and a measuring circuit 812 of an ESC 572. The measuring circuit 812 enables the control unit 810 to measure the current flowing through the user's feet. To this end, the control unit 810 can measure the voltage across a resistor called the measuring resistor Rm. The measuring resistor Rm can be variable and controllable. The control unit 810 can be part of the control circuitry 550.

[0082] . Switch 566 allows selection of two electrodes as anode and cathode, the first being connected to the DC voltage source 806 and the second being connected to the measuring resistor Rm.

[0083] The left group RG or the right group RD comprises at least two electrically independent electrodes 801, 803 and 802 and 804. By electrically independent, it is meant that the two electrodes 801, 803 or 802, 804 are not permanently electrically connected, and that it is therefore possible to have a configuration in which, since said two electrodes are electrically independent of each other, the switch 566 can assign them two different functions. Conversely, in one embodiment, the switch 566 can electrically connect the two electrodes 801, 803 or 802, 804, so that they have the same function.

[0084] Thanks to this independence, the measuring station 100 can perform measurements with an electrode 801 to 804 (from the same group LG, RG) which can take, at different times, at least two different functions, depending on the configurations allowed by the switch 566. For example, the measuring station 100 can perform sequentially (one after the other), thanks to the switch 566, at least two measurements from among: ESC, BIA, IPG, ICG, ECG (with or without the handle 110).

[0085] In one embodiment, the left group RG and the RD group each comprise at least two electrically independent electrodes 801, 803, 802, 804. In this way, each RG and RD group can have several functions: in particular, any measurement that requires two electrodes with different functions in the two groups (IPG between the legs, BIA between the legs, IPG in the foot, etc.).

[0086] Several embodiments illustrating such a configuration will be given.

[0087] . In a configuration, called DC voltage configuration, at least one of the electrodes 801, 803 of the right group RG and / or at least one of the electrodes 802, 804 of the left group LG is connected to the DC voltage source 806 (the so-called "active" electrode) by the switch 566.

[0088] In one embodiment, in a DC configuration, at least one electrode of each group LG, RG is not connected to the DC voltage source 806 via the switch 566. At least one other electrode of said group may be connected in high impedance (the so-called "passive" electrode) via the switch. The high impedance is a value between 500 kΩ and 20 MΩ (for example, 10 MΩ). The purpose of the high-impedance passive electrode is to allow the control unit 810 to measure the potential of a user's body without creating current leakage to the user. For example, the switch 566 connects the electrode to a circuit including a resistor of the aforementioned value (for example, with an operational amplifier).

[0089] In another embodiment, in the DC configuration, all the electrodes of group LG or RG are connected to the DC voltage source 806 via switch 566. This allows for maximum electrode surface area at both the anode and cathode. Specifically, in this embodiment, all the electrodes of the left group LG are connected to one terminal of the DC voltage source 806, and all the electrodes of the right group LG are connected to the other terminal of the DC voltage source 806. To still be able to measure body impedance, the handle 110 can be connected in high impedance mode via switch 566 (not shown in the figures). The user then holds the handle while performing an ESC.

[0090] Several surfaces are defined on the upper face 604 of the measuring plate 106: the surface Sa of the electrodes that are active in the CC configuration (cumulative surface of all these electrodes), and the surface St of all the electrodes used in the CC configuration (active and passive electrodes). An effective surface is also defined, which is the surface of the electrodes that is actually in contact with the foot. To free the definitions from the user's notion of "foot," an extended effective surface Sr is defined, which can correspond to a virtual rectangle 30 cm along the length Y and 15 cm along the width (this is a rectangle inside which a foot can be placed). A surface Se of the convex hull that encompasses the electrodes of the same group LG, RG is also defined. This is the smallest convex surface that includes all the electrodes of the same group LG, RG.

[0091] For a group LG, RG, the surface area of ​​the electrode(s) connected to the DC voltage source 806 in a DC configuration represents more than 50% of the total electrode surface area for the LG, RG group, and potentially more than 75%, 80%, 85%, or even 90% (Sa / St ratio). This surface area requirement will be referred to as the "surface area criterion" in the remainder of this description. This maximizes the total surface area of ​​active electrodes, which activate the sweat function of the feet, thus improving measurement accuracy. Furthermore, the surface area of ​​the electrode(s) connected to the DC voltage source 806 in a DC configuration represents more than 50% of the surface area of ​​the convex envelope Se, and potentially more than 55%, 60%, or even 80% (Sa / Se ratio). This ensures that the active electrodes in the CC configuration are distributed under the foot and not localized in one place.Indeed, the distribution of sweat glands can vary between individuals, and it is important to be able to limit the effects of this variation. Similarly, this condition helps to limit the effects of foot placement on the 102 base. To ensure that the electrode surface area is large enough to cover a significant portion of the foot, the maximum distance (Dmax) between the two outermost electrodes (including the electrodes themselves) along the Y length can be at least 20 cm, or even 25 cm. Likewise, each electrode extends along the X width for at least 10 cm, or even 15 cm. Alternatively, or additionally, the Se / Sr ratio can preferably be greater than 75%, or even 90%, or even greater than 100%.

[0092] To integrate the ESC function into the Base 102 (i.e., without a handle or electrodes in contact with any area other than the feet), one electrode of the Base 102 is configured as a passive, high-impedance electrode. This connection can be permanent (e.g., via a connection on the PCB) or switchable via switch 566.

[0093] . In practice, there are at least two DC configurations for any pair of electrodes: a DC configuration with anode / cathode and a DC configuration with cathode / anode.

[0094] The surface area of ​​the electrodes can be calculated in several ways. Ideally, only the effective surface area of ​​the electrodes is considered, that is, the surface area of ​​the electrodes that is actually in contact with the foot. An extended effective surface area can be defined, corresponding to an area on the upper face of the base 102 where the foot is likely to be placed during normal use of the measuring station 100. Finally, a total surface area can be defined, corresponding to the total surface area of ​​the electrodes on the upper face 604. In the case of the bands illustrated in figure 6 Since all three have the same shape, these definitions are identical. However, it is possible to consider configurations in which the effective area is unrelated to the total area, but the expanded effective area meets the criteria mentioned previously. Within this rectangle, the area criterion is met.

[0095] In the embodiment illustrated in figures 1 In position 6, in the CC configuration, eight out of nine bands of a group LG, RG are connected to the source 566, and one out of nine bands of the same group LG, RG is connected in high impedance (passive band). The band in passive electrode is preferably chosen from L7 or L9 (or respectively R8 or R9) in order to be at the level of the plantar arch where the contact of the foot with the upper surface 604 is weaker than elsewhere.

[0096] The base 102 of the station 100, with or without a handle, is configured to perform several measurements, including impedance measurements such as BIA or IPG. To this end, the measuring station 100 includes an impedance measurement system capable of measuring the impedance of a user's body in response to electrical stimulation. Specifically, the impedance measurement system may include an AC excitation source 814 (for example, the AC current source 600 or an AC generator), adapted to inject an alternating current (e.g., sinusoidal). The current values ​​are known to those skilled in the art. The AC current source 814 is connected to the electrodes 801 to 804 via the electronic circuit. The switch 566 allows the electrodes 801 to 804 to be connected and disconnected from the AC current source 814.In the case of impedance measurement, the electrodes 801, 804 are connected in pairs to the alternating current source 814, at the negative and positive terminals.

[0097] In an alternating current configuration, referred to as the AC configuration, at least one of the electrodes 801 to 804 from the right group RG and / or the left group LG is connected to the alternating current source 814 via the switch 566. Several AC configurations are possible: in particular, for a given electrode architecture and given functions, there may be several AC configurations for performing BIA and several AC configurations for performing IPG. The switch 566 is configured to selectively activate or deactivate the AC configuration and / or to alternate between the different AC configurations. This is referred to as the ACf configuration (f for " feet foot) when two electrodes of the same group LG, RG are connected to the two terminals of the alternating current source 814 because such a configuration allows an IPG to be performed in the foot; this will be referred to as the ACb configuration (b for " between the legs between the legs) when one terminal of the AC power source 814 is connected to at least one electrode of one group LG, RG and the other terminal of the AC power source 814 is connected to at least one electrode of the other group RG, LG, because this configuration allows in particular to make an IPG between the legs or a BIA between the legs.

[0098] Unless explicitly stated otherwise, any ACf configuration described for one electrode group (LG, RG) is applicable to the other electrode group (RG, LG) (symmetry between the two groups). However, the left foot ACf configuration is not activated simultaneously with the right foot ACf configuration (due to component limitations).

[0099] The 566 switch can be configured to selectively switch between at least one of the DC configurations and at least one of the AC configurations.

[0100] Among the AC configurations, one can cite a configuration where both terminals of the AC power source 814 are connected to at least two electrodes from the left LG and right RG groups: configurations ACf (IPG in the foot) and ACb (IPG bow leg or BIA without handle) are examples. There are also configurations where only one terminal of the AC power source 814 is connected to at least one electrode from the left LG and right RG groups; in this case, the measuring station 100 includes the handle 110, and the other terminal is connected to an electrode of the handle (specifically, a segmental BIA). This configuration will be called ACs ("s" for segmental because it allows for a segmental BIA).

[0101] In AC configuration, the control unit 810 may need to measure a potential at the user's body (feet and / or hands). For this purpose, the measuring station 100 includes a voltmeter 562 capable of measuring a potential difference between two electrodes. The switch 566 allows a pair of electrodes (for example, from electrodes 801 to 804, but also from the handle electrodes) to be connected to the terminals of the voltmeter 562, in order to measure a potential difference.

[0102] In practice, the current source(s) may not have two terminals as shown in schematic diagrams. Nevertheless, there is still a positive (i+) or negative (i-) pole, and a positive (V+) or negative (V-) pole, which are determined by the electrical circuit. The term "terminals" then refers to these poles.

[0103] Different arrangements of electrically conductive paths forming electrodes will be presented, in relation to the figures 9 à 15 Each arrangement is limited by physical constraints: the layout of the electrically conductive paths along the length Y must allow the foot to be in contact with said electrically conductive paths; therefore, the maximum distance Dmax (see on the figures 9 à 15 ) between the extremal electrodes along the Y-length in an LG group, RG is limited. The arrangements can be symmetrical around a Y-direction axis.

[0104] In DC configuration, the pair of electrodes connected to the DC voltage source 806 comprises at least one electrode from the left group LG and at least one electrode from the right group RD. For example, the left group LG contains the cathode and the right group RG contains the anode, or vice versa. However, two electrodes from the same group LG, RG cannot be connected to both terminals of the DC voltage source 806 (within the same group LG, RG, there cannot simultaneously be one electrode operating as the cathode and another electrode operating as the anode).

[0105] On the figures 9 à 15 "HiZ" means that, in a DC configuration, the electrode is connected to the high impedance; "An" or "Cath" means that, in a DC configuration, the electrode is connected to the DC voltage source 806 (either terminal, respectively); i+ or i- means that, in an AC configuration, the electrode is connected to the AC current source 814 (either terminal, respectively); V+ or V- means that, in an AC configuration, the electrode is connected to the voltmeter 562 (either terminal, respectively); "-" means that, regardless of the configuration, the electrode is inactive (e.g., electrically disconnected, disconnected by switch 556). A single electrode can therefore have several of these symbols, since it can, depending on the configuration determined by switch 566, sequentially perform several functions.

[0106] . There figure 9illustrates an arrangement 900 in which each group LG, RG comprises two independent electrodes 901, 903 (group LG) and 902, 904 (group RG). The functions of the electrodes indicated on the figure 9 are in the form "CC / ACb".

[0107] In DC configuration, switch 566 connects electrodes 901 to the DC voltage source 806 (anode / cathode or cathode / anode). In one variant (not shown), electrodes 903 and 904 are also connected to the DC voltage source 806 (electrode 901 to electrode 903 and electrode 902 to electrode 904). In another variant (shown), switch 566 connects electrodes 903 and 904 to the high impedance (HiZ). In the illustrated example, the passive electrodes 903 and 904 are located, along the length Y, below the electrodes 901 and 902. However, in this configuration, there is a risk that the user's foot will not be in contact with the electrodes 903 and 904. The surface area of ​​the electrodes 901, 903, 902, and 904 is chosen so that the surface area of ​​the active electrodes in the CC configuration meets the surface area criterion mentioned previously.

[0108] In AC configuration, switch 566 connects at least one electrode 901, 902, 903, 904 to the AC power source 814. In particular, in ACb configuration, switch 566 connects the pair of electrodes 901 and 902 to the terminals of voltmeter 562 and switch 566 connects the pair of electrodes 903 and 904 to the terminals of the AC power source 814. The 900 arrangement allows for a BIA between the legs or an IPG between the legs.

[0109] . In the case of an ACs (segmental BIA) configuration with station 100 which includes handle 110, some of the electrodes of the left group LG or the right group RG can be connected to one terminal of the AC power source 814 or to the voltmeter 562 without other electrodes of the same group LG, RG being connected to the other terminal of the AC power source 814 or to the voltmeter 562.

[0110] The 900 configuration, based on a 102 base, allows for ESCs that cover most of the foot (including the possibility of right / left foot separation thanks to the high-impedance electrode), while also providing a versatile 102 base capable of performing impedance analysis between the legs (BIA, IPG). The 566 switch allows switching between a DC and an AC configuration.

[0111] However, such an arrangement can have drawbacks, particularly regarding the positioning of the foot, which may not be in contact with electrodes 903 and 904. Furthermore, enlarging these electrodes reduces the surface area of ​​electrodes 901 and 902 for the ESC, which is undesirable. In addition, the number of measurements that can be performed is limited (for example, by the ACf configuration, for performing an IPG in the foot).

[0112] . There Figure 10illustrates an arrangement 1000 that does not present the aforementioned drawbacks. Each group LG, RG comprises three independent electrodes 1001, 1003, 1005 (LG) and 1002, 1004, 1006 (RG). The functions of the electrodes indicated on the Figure 10 are in the form "CC / ACb".

[0113] . In this arrangement, electrode 1003 (respectively 1004) is located, along the length Y, between electrodes 1001, 1005 (respectively 1002, 1006).

[0114] In the DC configuration, switch 566 connects electrodes 1001, 1005 (LG) and 1002, 1006 (RG) to the DC voltage source 806 (anode / cathode or cathode / anode). In an unillustrated variant, electrodes 1003 and 1004 are also connected to the DC voltage source 806 (electrode 1003 with electrodes 1001 and 1005, and electrode 1004 with electrodes 1002 and 1006); in an illustrated variant, switch 566 connects electrodes 1003 and 1004 to the high impedance HiZ.

[0115] The surface area of ​​the electrodes is chosen so that the surface area of ​​the active electrodes in the DC configuration meets the previously mentioned surface area criterion. This means that the surface area of ​​the passive (high impedance) electrode is smaller than the surface area of ​​an active electrode. In particular, in this arrangement, electrodes 1001, 1005, 1002, and 1006 can be large enough for the Se / Sr ratio to be greater than 100%. In one example, electrodes 1001, 1002, 1005, and 1006 have a length dimension Y of at least 10 cm (e.g., 14 cm); electrodes 1004 have a length dimension Y between 1.5 cm and 2.5 cm; and the electrodes can have a width dimension X greater than 10 cm.

[0116] In the ACb configuration, switch 566 connects electrodes 1001 and 1002 to voltmeter 562, and switch 566 connects electrodes 1005 and 1006 to the AC power source 814. The connection between the negative and positive terminals can be reversed. In the ACb configuration, electrodes 1003 and 1004 are inactive. Arrangement 1000 allows for a BIA (Bilateral Interval Training) between the legs or an IPG (Intrapelvic Point Training) between the legs.

[0117] The 1000 configuration thus allows, on a 102 base, for ESC (Electronic Steady State) that covers most of the foot (including the possibility of right / left foot separation thanks to the high-impedance electrode), while also providing a versatile 102 base capable of performing impedance analysis. Due to the positioning of electrodes 1003 and 1004 in the middle of the foot and the possibility of using large electrodes 1001 and 1005, the sensitivity to foot position along the Y-axis is quite low, ensuring good measurement repeatability.

[0118] Such an arrangement is particularly suitable when one does not want to have an ACf configuration, i.e., when one does not want to perform IPG in the foot.

[0119] . There figure 11illustrates an arrangement 1000 that does not present the aforementioned drawbacks. Each group LG, RG comprises four independent electrodes 1101, 1103, 1105, 1107 and 1102, 1104, 1106, 1108. The functions of the electrodes indicated on the figure 11 are in the form "CC / ACf (right and left) / ACb". The right and left ACf arrangements are not implemented simultaneously (due to data acquisition issues by the control and switching circuitry).

[0120] In the DC configuration, switch 566 connects electrodes 1101, 1105, 1107 (LG) and 1102, 1106, 1108 (RG) to the DC voltage source (anode / cathode or cathode / anode). In an unillustrated variant, electrodes 1103 and 1104 are also connected to the DC voltage source 806 (connected to the same terminal as the other electrodes in their electrode group); in an illustrated variant, switch 566 connects electrodes 1103 and 1104 to the high impedance HiZ. Electrodes 1103 and 1105 (or 1104 and 1106, respectively) can be reversed.

[0121] The surface area of ​​the electrodes is chosen so that the surface area of ​​the active electrodes in the CC configuration meets the criterion mentioned previously. In particular, if electrodes 1101 to 1108 all have the same surface area, the ratio of the active electrode surface area to the total surface area is 75%.

[0122] Several AC configurations are possible. In an ACf configuration, switch 566 connects electrodes 1101 and 1107 to the terminals of the AC power source 814, and switch 566 connects electrodes 1103 and 1105 to the terminals of the voltmeter 562. This configuration allows for an IPG in the foot.

[0123] In an ACb configuration, the switch 566 connects one or two of the electrodes 1101, 1103 and one or two of the electrodes 1102, 1104 to the terminals of the voltmeter 562 and connects one or two of the electrodes 1105 and 1107 and one or two of the electrodes 1106 or 1108 to the terminals of the alternating current source 814. This ACb configuration allows for an IPG in the bow leg or a BIA between the legs.

[0124] . In the case of an ACs (segmental BIA) configuration with station 100 which includes handle 110, some of the electrodes of the left group LG or the right group RG can be connected to one terminal of the AC power source 814 or to the voltmeter 562 without other electrodes of the same group LG, RG being connected to the other terminal of the AC power source 814 or to the voltmeter 562.

[0125] The 1100 arrangement thus allows for a segmental BIA, a BIA between the legs, an IPG between the legs and an IPG in the foot.

[0126] The 1100 arrangement thus allows, on a 102 base, to perform an ESC which covers most of the foot (with in particular a separation right foot left foot possible thanks to the high impedance electrode), while having a versatile 102 base which can perform impedance measurement with a high degree of adaptability.

[0127] However, in the ACf configuration (for IPG in the foot), the 1100 arrangement features two electrodes 1103 or 1105 (or 1104 and 1106) connected to the two terminals of the AC current source 814, while remaining quite close to each other (distance Δ in the figures, which is defined as the minimum distance between the V+ and V- electrodes in the ACf configuration). This proximity can lead to a loss of signal quality when obtaining the voltage reading from the voltmeter 562. It might then be possible to space electrodes 1103 and 1105 further apart (and 1104 and 1106 further apart), but then, due to the constraint of the maximum distance Dmax, the size of electrodes 1101 to 1108 must be reduced. In CC configuration, this means that the surface area of ​​the anodes or cathodes in contact with the foot decreases, which generates difficulties for the measurement of ESC.

[0128] . There figure 12illustrates a 1200 arrangement that addresses the aforementioned difficulty with the 1100 arrangement. Each LG, RG group comprises five independent electrodes: 1201, 1203, 1205, 1207, 1209 and 1202, 1204, 1206, 1208, 1210. The functions of the electrodes indicated on the figure 12 are in the form "CC / ACf (right and left) / ACb". The right and left ACf arrangements are not implemented simultaneously (due to data acquisition issues by the control circuitry and the operation of the switch).

[0129] In the DC configuration, switch 566 connects electrodes 1201, 1203, 1207, 1209 and 1202, 1204, 1208, 1210 to the DC voltage source 806 (anode / cathode or cathode / anode). In an unillustrated variant, electrodes 1205 and 1206 are also connected to the DC voltage source 806 (connected to the same terminal as the other electrodes in their electrode group); in an illustrated variant, switch 566 connects electrodes 1205 and 1206 to the high impedance HiZ. Electrode 1205 (or 1206, respectively) can be swapped with electrode 1203 or 1207 (or 1206 with 1204 or 1208, respectively).

[0130] The electrode surface area is chosen so that the surface area of ​​the electrodes that are active in the CC configuration meets the previously mentioned surface area criterion. The configuration with five independent electrodes allows verification of the aforementioned surface area criterion without compromising the ability to perform a variety of different measurements (ESC, BIA, IPG, etc.) or the quality of the measurements. In particular, if electrodes 1201 to 1210 all have the same surface area, the ratio of the active electrode surface area to the total surface area is 80%. If electrodes 1205 and 1206 (electrodes configured to be passive in the CC configuration) are smaller (as illustrated), this ratio increases.

[0131] As with arrangement 1100, the ACf configuration is possible because each electrode group LG, RG comprises at least four independent electrodes. In an ACf configuration, switch 566 connects electrodes 1201 and 1209 (1202 and 1210 for the right-hand ACf arrangement) to the terminals of AC power source 814, and switch 566 connects electrodes 1203 and 1207 (1204 and 1208 for the right-hand ACf arrangement) to the terminals of voltmeter 562. This configuration allows for an IPG in the foot. Switch 566 can disable electrodes 1205 (1206 for the right-hand ACf arrangement) by disconnecting them or grounding them.

[0132] In an ACb configuration, switch 566 connects one or two of electrodes 1201 and 1203 and one or two of electrodes 1202 and 1204 to the terminals of voltmeter 562 and connects one or two of electrodes 1207 and 1209 and one or two of electrodes 1208 or 1210 to the terminals of AC voltage source 814. This ACb configuration allows for an IPG in a leg arc or a BIA between the legs.

[0133] . In the case of an ACs (segmental BIA) configuration with station 100 which includes handle 110, some of the electrodes of the left group LG or the right group RG can be connected to one terminal of the AC power source 814 or to the voltmeter 562 without other electrodes of the same group LG, RG being connected to the other terminal of the AC power source 814 or to the voltmeter 562.

[0134] In this 1200 arrangement, the passive electrodes 1205 and 1206 may not be activated in the ACf configuration (for in-foot IPG). This means that the distance Δ can be increased compared to the 1100 arrangement by placing an inactive electrode between the electrodes connected to the AC current source in the ACf configuration. This improves the quality of the impedance measurement signals (in-foot IPG) while providing a larger anode and cathode area compared to the 1100 arrangement. The passive electrode (HiZ) can be smaller than the others; since there are four other independent electrodes, both the ACf and ACb configurations can be implemented.

[0135] The 1200 arrangement thus allows for a BIA between the legs, an IPG between the legs and an IPG in the foot.

[0136] . In a variant of the 1200 arrangement, electrodes 1205 and 1203 (respectively 1206 and 2014) can be reversed or electrodes 1205 and 2017 (respectively 1206 and 2018) can be reversed.

[0137] The 1200 arrangement thus allows, on a 102 base, to perform an ESC which covers most of the foot (with in particular a separation right foot left foot possible thanks to the high impedance electrode), while having a highly versatile 102 base which can perform impedance measurement with a high degree of granularity, in particular IPG in the foot with an increased distance Δ between electrodes to have good signal quality.

[0138] . There figure 13Figure 1300a and Figure 1300b illustrate two arrangements that allow for a further increase in the distance Δ between the electrodes while maintaining good ESC quality. Each LG, RG group comprises six independent electrodes: 1301, 1303, 1305, 1307, 1309, 1311, 1313 and 1302, 1304, 1306, 1308, 1310, 1312. The functions of the electrodes are indicated on the figure 9 are in the form "CC / ACf (right and left) / ACb". The right and left ACf arrangements are not implemented simultaneously (due to data acquisition issues by the control circuitry and the operation of the switch).

[0139] In the DC configuration, switch 566 connects electrodes 1301, 1303, 1307, 1309, 1311, 1313 (LG) and 1302, 1304, 1308, 1310, 1312 (RG) to the DC voltage source 806 (anode / cathode or cathode / anode). In a variant not shown, electrodes 1305 and 1306 are also connected to the DC voltage source 806 (connected to the same terminal as the other electrodes in their electrode group); in a variant shown, switch 566 connects electrodes 1305 and 1306 to the high impedance HiZ. Electrodes 1305 and 1307 (respectively 1306 and 1308) can be reversed. Central electrodes along the Y-axis are preferred for passive electrodes during ESC. The electrode surface area is chosen so that the surface area of ​​the active electrodes in the CC configuration meets the previously mentioned surface area criterion.The configuration with six independent electrodes allows for even more precise verification of the previously mentioned surface area criterion without compromising the ability to perform a variety of different measurements (ESC, BIA, IPG, etc.) or the quality of the measurements. Specifically, if electrodes 1301 to 2012 all have the same surface area, the ratio of the active electrode surface area to the total surface area is over 83% (5 / 6). If electrodes 1305 and 1306 (electrodes configured to be passive in the DC configuration) are smaller than the others, the ratio is even better.

[0140] As with arrangements 1100 and 1200, the ACf configuration is possible because each electrode group LG, RG comprises at least four independent electrodes. In an ACf configuration, switch 566 connects electrodes 1301 and 1311 (respectively 1302 and 1312) to the terminals of the AC power source 814, and switch 566 connects electrodes 1303 and 1309 (1304 and 1310) to the terminals of the voltmeter 562. This configuration allows for an IPG in the foot. Switch 566 can disable electrodes 1305, 1306, 1307, and 1308 by disconnecting them or grounding them.

[0141] In an ACb configuration, the switch 566 connects one, two, or three of the electrodes 1301, 1303, 1305 (for example, two, as illustrated) and one, two, or three of the electrodes 1302, 1304, 1306 (for example, two, as illustrated) to the terminals of the voltmeter 562 and connects one, two, or three of the electrodes 1307, 1309, and 1311 (for example, two, as illustrated) and one, two, or three of the electrodes 1308, 1310, and 1312 (for example, two, as illustrated) to the terminals of the AC current source 814. This ACb configuration allows for an IPG in a leg arc or a BIA between the legs.

[0142] . In AC configuration, (segmental BIA) with station 100 which includes handle 110 some of the electrodes of the left group LG or the right group RG can be connected to the AC power source 814 or to voltmeter 562 without other electrodes of the same group being connected to the AC voltage source 814 or to voltmeter 562.

[0143] In this 1300a arrangement, electrodes 1305, 1307 (and 1306, 1308) may not be activated in the ACf configuration (for foot impedance measurement). This means that the distance Δ can be increased, compared to the 1200 arrangement, by placing two inactive electrodes between the electrodes connected to the AC current source in the ACf configuration. This improves the quality of the impedance measurement signals (foot impedance measurement), while also providing a higher Sa / ST ratio (the surface criterion) compared to the 1200 arrangement.

[0144] The 1300a arrangement thus allows for a BIA between the legs, an IPG between the legs and an IPG in the foot.

[0145] . In a variant of the 1300a arrangement, not illustrated, electrodes 1305 and 1307 (respectively 1306 and 1308) can be reversed.

[0146] The 1300b arrangement is a variant of the 1300a arrangement in which, for each of the RG and LG groups, electrode 1307 has a larger surface area than the others, particularly electrodes 1303 or 1309. Specifically, electrode 1307 extends along the Y-length on either side of electrode 1305 (thus forming a double electrode). With the 1300b arrangement, the distance Δ is further increased by placing three inactive electrically conductive paths (a single electrode and a double electrode) between the electrodes connected to the ACf current source. In this arrangement, electrode 1307 is preferably inactive in the AC configuration (particularly ACb). The Se / Sr ratio can be greater than 100% (or at least 90%), thanks to the multiplicity of electrodes along the Y length of the base 102.In one example, the bands on the top face corresponding to electrodes 1301-1312 have a dimension along the length Y between 1.5 cm and 2 cm (for example 1.7 cm); the spacing between two successive bands can be between 0.5 cm and 1 cm (for example 0.85 cm); the electrodes can have a dimension along the width X greater than 10 cm.

[0147] The 1300a, 1300b arrangements thus allow, on a 102 base, to perform an ESC which covers most of the foot (with in particular a separation right foot left foot possible thanks to the high impedance electrode), while having a highly versatile 102 base which can perform impedance measurement with a high degree of granularity, in particular IPG in the foot with a large Δ distance between electrodes for better signal quality.

[0148] . There figure 14This illustrates an arrangement 1400 which shares several characteristics with arrangement 1300b, except that instead of doubling electrode 1307, another independent electrode is added. Each group LG, RG thus comprises seven independent electrodes: 1401, 1403, 1405, 1407, 1409, 1411, 1413 (LG) and 1402, 1404, 1406, 1408, 1410, 1412, 1414 (RG). The functions of the electrodes indicated on the figure 12 are in the form "CC / ACf (right and left) / ACb". The right and left ACf arrangements are not implemented simultaneously (due to data acquisition issues by the control circuitry and the operation of the switch).

[0149] In the DC configuration, switch 566 connects electrodes 1401, 1403, 1405, 1409, 1411, 1413, 1413 (LG) and 1402, 1404, 1406, 1410, 1412, 1414 (RG) to the DC voltage source 806 (anode / cathode or cathode / anode). In an unshown variant, electrodes 1407 and 1408 are also connected to the DC voltage source 806 (connected to the same terminal as the other electrodes in their electrode group LG, RG); in an illustrated variant, switch 566 connects electrodes 1407 and 1408 to the high impedance HiZ. Electrode 1407 can be swapped with either electrode 1405 or 1409 (or 1406 and 1408, respectively). Central electrodes are preferred for passive electrodes during ESC. The electrode surface area is chosen so that the surface area of ​​the active electrodes in the CC configuration meets the previously mentioned surface area criterion.The configuration with seven independent electrodes allows for even stronger verification of the previously mentioned surface area criterion without compromising the ability to perform a variety of different measurements (ESC, BIA, IPG, etc.) or the quality of the measurements. Specifically, if electrodes 1401 to 1414 all have the same surface area, the ratio of the active electrode surface area to the total surface area is over 85% (six out of seven bands).

[0150] As with arrangements 1100, 1200, 1300a, and 1300b, the ACf configuration is possible because each electrode group LG, RG comprises at least four independent electrodes. In an ACf configuration, switch 566 connects electrodes 1401 and 1413 (respectively 1402 and 1414) to the AC power source 814, and switch 566 connects electrodes 1403 and 1411 (respectively 1404 and 1412) to the terminals of voltmeter 562. Switch 566 can disable electrodes 1405, 1406, 1407, 1408, 1409, and 1410 by disconnecting or grounding them. This configuration allows for an IPG (Integrated Power Group) in the foot.

[0151] In an ACb configuration, the switch 566 connects one, two, or three electrodes from among electrodes 1401, 1403, 1405 (for example, all three, as illustrated) and one, two, or three from among electrodes 1402, 1404, 1406 (for example, all three, as illustrated) to the terminals of the voltmeter 562 and connects one, two, or three from among electrodes 1409, 1411, 1413 (for example, two, as illustrated) and one, two, or three electrodes from among electrodes 1410, 1412, 1414 (for example, two, as illustrated) to the terminals of the AC current source 814. This ACb configuration allows for an IPG in a leg arc or a BIA between the legs.

[0152] . In ACs configuration (segmental BIA) with station 100 which includes handle 110 some of the electrodes of the left group LG or the right group RG can be connected to the AC power source 814 or to the voltmeter 566 without other electrodes of the same group being connected to the AC power source 814 or to the voltmeter 566.

[0153] In this 1400 arrangement, electrodes 1405, 1407, and 1409 may not be activated in the AC configuration for foot impedance measurement (IPG). This means that the distance Δ is increased, compared to the 1200 arrangement, by placing three inactive electrodes between the electrodes connected to the AC current source in the ACf configuration. This improves the quality of the impedance measurement signals (foot IPG).

[0154] The 1400 arrangement thus allows for a BIA between the legs, an IPG between the legs and an IPG in the foot.

[0155] . In a variant of the 1400 arrangement, electrodes 1405 and 1407 (respectively 2206 and 2208) can be reversed.

[0156] The 1400 array, based on a 102 grid, allows for ESC (Electronic Steady Level) measurements that cover most of the foot (including the possibility of separating the right and left feet thanks to the high-impedance electrode). This highly versatile 102 grid can perform impedance analysis with a high degree of granularity, including IPG (Integrated Peripheral Gap) in the foot, with an optimized electrode distance (Δ) for good signal quality. Sensitivity to foot position in width (X) and length (Y) is quite low, ensuring good measurement repeatability.

[0157] In this arrangement, three electrodes are inactive in the ACf configuration. This allows for electrodes for BIA or IPG with a reduced surface area, thus improving signal quality. Current injection and voltage measurement can be better when localized on the foot (by "localized," we mean on a small area under the foot). Conversely, these three inactive electrodes in the ACf configuration become two active and one passive electrode in the CC configuration, maximizing the electrode surface area. This seven-electrode independent configuration provides a large active electrode area in the AC configuration while allowing for multiple types of measurements on the feet or on each foot with good signal quality.

[0158] . In all AC configurations shown in the description, the connections to the terminals of the AC power source 814 can be reversed (i+ becomes i- and i- becomes i+); similarly, the connections to the terminals of the voltmeter 562 can be reversed (V+ becomes V- and V- becomes V+).

[0159] In all AC configurations described, the connection between the AC power source 814 and the voltmeter 562 can be reversed (V becomes i and i becomes V). However, for ACf configurations, it is preferable to have the V+ and V- electrodes within the segment of the user's body through which the current generated between the i+ and i+ electrodes flows. Otherwise, the current flow is not controlled for the segments between the i and V electrodes.

[0160] In the arrangements presented above, certain electrodes can perform at least two, three, or four different functions. Dividing the array into a plurality of bands along the length Y, arranged parallel to each other along the width X, allows for increased modularity while maintaining good measurement quality.

[0161] In one embodiment, the measuring station 100 allows for taking an ECG. The ECG can be taken between the legs, between the hands (RA, LA electrodes on the figure 4 ) or between the hands (RA, LA electrodes) and legs. One of the electrodes in the left group LG can then be connected by switch 566 as an LL electrode (“ left leg "). One of the electrodes of the right group RG can then be connected by the switch 566 as electrode RG. Electrodes not connected to the DC power source 814 or to the voltmeter 562 are inactive (e.g. disconnected).

[0162] In all the arrangements described, the Y dimension (i.e., along the Y direction, that is, the length of the base 102) of the electrodes that are active in the CC configuration can be equal to or greater than the Y dimension of the electrodes that are passive in the CC configuration. This maximizes the surface area of ​​the base in contact with the active electrodes. Arrangements 1000 and 1200 illustrate a case where the passive electrode 1003, 1004, 1205, 1206 is smaller along the Y-axis than the active electrodes 1001, 1005, 1002, 1006, 1203, 1207, 1204, 1208. This arrangement is possible due to the multiple electrodes, which allow one electrode to be dedicated to high impedance while still having enough electrodes of suitable size to perform the other measurements. Arrangements 1300 and 1400 illustrate cases where the passive electrode 1305, 1306, 1407, 1408 has the same size along the Y-axis as the active electrodes.In particular, the higher the number of independent electrodes per LG, RG group, the smaller the surface area of ​​each electrode. Therefore, connecting a single electrode to the high impedance does not significantly reduce the contact area between the skin and the anode or cathode.

[0163] In arrangements with three or more independent electrodes per electrode group RG, LG (arrangements 1000, 1100, 1200, 1300a, 1300b, 1400), the electrode that is passive in the CC configuration is positioned, along the Y-length, between two electrodes that are active in the CC configuration. This positioning offers two advantages: it increases the probability that the user will touch the passive electrode (a foot misalignment along the Y-length of the 102 base will have no consequence), and it limits the contact area lost with the foot for the ESC: due to the curvature of the foot, the contact between the electrode positioned under the arch of the foot is less than for the other electrodes. Consequently, the surface area lost for the ESC is less than for other electrodes.

[0164] Alternatively, the passive electrode in the DC configuration can be placed as an extremal electrode. This allows contact with the heel or toe to ensure that the user's body is properly set to the high impedance.

[0165] In all the arrangements described, the electrodes at the extreme positions along the Y-length can have a larger surface area than the other electrodes. Such an arrangement 1500 is illustrated in particular on the figure 15 , in which the extreme electrodes (1501, 1502, 1508, 1509) may have a dimension along the Y length that is larger (for example, twice as large) than the other electrodes (1503, 1504, 1506, 1507). When the electrodes have the same shape, the two formulations are equivalent.

[0166] This means that on arrangements 1000, 1100, 1200, 1300a, 1300b, 1400, the extreme electrodes along length Y can have a dimension along length Y larger than that of the electrically conductive paths between the two extreme electrically conductive paths. For example, on the figure 6 The pairs of bands L1 and L3, L15 and L17, R2 and R4, and R16 and R18 are not electrically independent but are permanently connected in the electrical circuit. This configuration allows for an increase in the size of the outer electrodes without altering the visual appearance of the top surface 604.

[0167] The electrodes can have a constant dimension along the width X of the base 102. This limits the sensitivity of the measurements depending on the position of the foot along the width X. This means that along the width X, the electrodes of the same group RG, LG begin and end at the same point. In other words, any line parallel to the length Y passing through an electrical conduction path of a group passes through all the electrical conduction paths of the group. In one embodiment, on the top face 604, the electrodes each have a rectangular shape, with a dimension along the width X greater than the dimension along the length Y (a ratio of at least five). On the top face 604, the rectangles can have the same dimensions.

[0168] In one embodiment, the electrodes extend along the width X of the measuring station 100 for at least 40%, or even 45%, of the width X100 of the measuring station. This ensures that the foot makes good contact with the electrodes, regardless of its position along the width X.

[0169] Having a regular arrangement of bands on the upper surface can encourage the user to position themselves between the outermost bands, thus allowing them to naturally find the correct position. Furthermore, larger outermost electrodes increase the likelihood of the foot touching both outermost electrodes.

[0170] The arrangement of identical strips creates a uniform appearance on the top surface, which helps to eliminate the "medical" look of the 100-meter measuring station and thus promotes product retention (longer use of the station). In other words, the user feels they are using a comfort product rather than a product for monitoring physiological parameters.

[0171] The distance Δ can be at least 8 cm, or even at least 9 cm. In particular, there is a constraint relating to the minimum length of a foot: if the distance Δ is too large, a small foot will not be able to be in contact with the four electrodes of the electrode group RG, LG (for an ACf configuration).

[0172] Between two successive ESCs, the 566 switch or the 806 voltage generator can reverse the anode and cathode to allow for electrode regeneration. This is because a redox reaction occurs with each ESC, which degrades the metallic deposits or metallic inserts.

[0173] In one embodiment, the measuring station 100 allows for taking ECGs of the user. The sensors 104 used for this purpose are located on the substrate and on the handle, so that at least one foot and one hand are in contact with an electrode. In particular, both feet and both hands are in contact with at least one electrode.

[0174] . Document WO2021 / 164561 describes a scale with a handle for performing an ECG.

[0175] To obtain a multi-lead ECG, the left lower limb must be connected to a so-called LL (left leg) electrode. Using switch 566, an ECG setup can include at least one left group (LG) electrode connected to the ECG circuit 568 (for example, electrode L15 / L17). Another setup also includes an ACf configuration in the right foot, to perform an ECG simultaneously with an IPG in the right foot. Alternatively, another setup includes an ACb configuration, except that only electrode L13 of the L13, L15 / L17 electrodes is connected to the AC generator (electrode L15 / L17 being connected to the LL electrode for the ECG).

[0176] . There figure 16This represents an electrical diagram with the logic of switch 566 (with a simplified representation of the handle). Switch 566 comprises a plurality of switches, which are positioned, for example, on the PCB of base 102 and on the PCB of handle 110. References on the figure 16 are similar to those previously used (Sudo_HiZ being HiZ, Sudo being Cath or An, I being i, and open meaning that the switch is open). Each electrode L1 to R18, LH1, LH2, RH1, RH2 is connected to the 550 control circuitry via one or more 1602 switches. Each 1602 switch can be controlled by one or more GPIO ports (" General Purpose Input / Output"), represented by the values ​​0 and 1 next to the switch connections. A two-position switch is controlled by a single GPIO, and a four-position switch is controlled by two GPIOs. The GPIO instructions are sent, for example, by the MCU. In particular, switch 566 includes at least one switch per electrode. In configurations with N independent electrodes (for an electrode group), measurement station 100 includes at least N switches.

[0177] . There figure 17Figure 110 shows the handle in more detail (except for the dotted square, which represents the components in base 102). The switch here comprises two master switches, 1702a (in the handle) and 1702b (in the base). Opposite these are switches that include, for example, four switches that simultaneously switch to the same position. They allow switching between an ECG configuration and an impedance measurement (BIA, IPG) configuration while limiting the number of wires in the cable 302 (to maintain a small and flexible cable cross-section). The handle 110 includes at least one ECG electrical circuit of handle 1706 connected to at least one electrode LH1, LH2, RH1, or RH2 and configured to process the signal before it travels through the cable 302 (typically a follower circuit with an operational amplifier).The handle 110 includes at least one handle impedance measurement circuit 1706 connected to at least one electrode LH1, RH1 configured to process the signal before it travels through cable 302 (typically a follower circuit with an operational amplifier), and then to the voltmeter. The ECG and impedance measurement circuits are connected to the master switch 1702a. LA_DETECT and RA_DETECT are part of a grip detection system for the handle 110, which is not described in further detail here. The other switches on the handle 110 allow the electrodes RH1, RH2, LH1, and LH2 to be connected to either the ECG circuit or the BIA circuit.In particular, switch 566 includes a switch 1708 that allows the RH2 electrode to be selectively connected to the ECG electrical circuit 1704 or to the impedance measurement circuit 1706 (connected to the voltmeter); switch 566 includes a switch 1710 that allows the LH2 electrode to be connected to the ECG electrical circuit 1704 or to the impedance measurement electrical circuit 1706 (connected to the voltmeter); switch 566 includes a switch 1712 that allows the RH1 electrode to be selectively connected to the RH2 electrode or to an impedance measurement circuit (connected to the current source); switch 566 includes a switch 1714 that allows the LH1 electrode to be selectively connected to the LH2 electrode or to an impedance measurement electrical circuit (connected to the current source). figures 16 And 17They therefore fully describe the electronic configuration of switch 566, enabling the implementation of the configurations described therein. The dual switch 1702a, 1702b allows for limiting the number of conductors passing through cable 302. In particular, the handle includes a master switch 1702, and each electrode of the handle is connected to a switch to toggle between an ECG processing circuit and an impedance measurement circuit.

[0178] . There figure 18 This schematically illustrates a set of electrode configurations for measuring station 100. The handle 110 and its four electrodes are shown; the base and its left and right groups LG, RG, with their seven electrodes each, are also shown. Following the electrical conduction paths 602 of the figure 6The seven electrodes of the left LG assembly are: L1 and L3 (which are connected), L5, L7, L9, L11, L13, L15, and L17 (which are connected); and the seven electrodes of the right RG assembly are: R2 and R4 (which are connected), R6, R8, R10, R12, R14, R16, and R18 (which are connected). On the figure 18 Thirteen configurations for the electrode function were shown. The switch of the figure 16 allows switching between the thirteen configurations. Each table includes fourteen boxes (thirteen activated functions and one total disconnection), which represents the function of the electrode for a configuration: . BIA or IPG (between the legs) BIA / ICG (right half - leg and arm) BIA (right arm) BIA (left leg) BIA / ICG (left half - leg and arm) BIA (left arm) BIA (left leg) IPG (in the right foot) IPG (in the left foot) ECG with IPG (in the right foot) ECG with IPG (between the legs) ESC (anode on the left) ESC (anode on the right) Logout

[0179] On the figure 18i+ and i- are the electrodes connected to the AC current source (AC configuration); V+ and V- are the electrodes connected to the voltmeter (AC configuration); LL, LA, RA are the electrodes connected to the ECG acquisition system (ECG configuration); A and K are the electrodes connected to the DC voltage source (DC configuration); Z are the electrodes connected to the high impedance (DC configuration).

[0180] For each of the configurations of the figure 17 , a combination of the GPIO ports is represented on the figure 16 which allows for the proper connection of the electrodes.

[0181] The 566 switch can also disconnect all the electrodes from the 102 base.

[0182] In one embodiment, the electrodes are all made of ITO (indium tin oxide). The use of this material is documented for impedance analysis. However, for ESCs, the material used generally includes steel or nickel. The inventors discovered that ITO offered equivalent performance while having superior deposition properties.

[0183] The 100 measurement station allows for a variety of different measurements (ESC, BIA, IPG, etc.) by assigning different functions to the same electrically conductive paths. Switch 566 allows for toggling between configurations. The memory can store a program containing instructions which, once executed by the processor, implement different methods.

[0184] According to one embodiment, the control circuitry 550 implements the following method: (E1) activation of switch 556 to put the electrodes in one configuration, (E2) triggering of a measurement associated with the configuration, (E3) activation of switch 556 to put the electrodes in another configuration, (E4) triggering of a measurement associated with the other configuration. The change of configuration can, in particular, be any of the configurations described in the description and especially in figure 18 CC to AC, including CC to ACf or CC to ACb. CC to ACf can be CC to ACf left foot or CC to ACf right foot, ACf to ACb, ACb to another ACb, etc.

Claims

1. A measurement station comprising: a left group (LG) of electrodes, comprising at least two electrically independent electrodes arranged to be in contact with the underside of a user's left foot, a right group (RG) of electrodes, comprising at least two electrically independent electrodes arranged to be in contact with the underside of the user's right foot, a direct current source (806), a switch (566) configured to activate and deactivate a so-called direct current configuration, referred to as the DC configuration, in which at least one electrode, referred to as an active electrode, of at least one group of electrodes (LG, RG) is connected to the DC voltage source (806), an alternating current source (814), wherein the switch (566) is configured to selectively activate or deactivate a so-called alternating current configuration, referred to as the AC configuration (ACs, ACf, ACb), in which at least one electrode from among the electrodes of the left group of electrodes and the right group of electrodes is connected to the alternating current source, and wherein, for a group (LG, RG), the surface area of the electrode(s) connected to the DC voltage source (806) in DC mode represents more than 50% of the surface area of the electrodes in the group (LG, RG), or even more than 75%.

2. A measuring station according to claim 1, wherein, in DC configuration, at least one electrode, referred to as a passive electrode, of at least one group of electrodes is not connected to the DC voltage source (806).

3. A measuring station according to claim 1 or 2, wherein, in an AC configuration (ACf, ACb), the switch (566) is configured to connect: at least two electrodes from among the electrodes of the left electrode group (LG) and the right electrode group (RG) to the terminals of the AC power source (814), for example: - at least one electrode from the left group (RG) and at least one electrode from the right group (RD) to the terminals of the AC power source (814), or - at least one electrode from one group to one terminal of the current source and another electrode from the same group to another terminal of the current source.

4. A measuring station according to any one of claims 1 to 3, wherein: the left group (LG) and / or the right group (RG) each comprises three electrically independent electrodes (1001, 1002, 1003, 1004, 1005, 1006), in DC configuration, the switch (566) is configured to connect at least two electrodes (1001, 1005) of the left group (LG) and / or at least two electrodes (1002, 1006) of the right group (RG) to the DC voltage source (806), or the left group (LG) and / or the right group (RG) each comprises four electrically independent electrodes, and in DC mode, the switch (566) is configured to connect at least three electrodes of the left group and / or at least three electrodes of the right group to the DC voltage source (806), or the left group (LG) and / or the right group (RG) each comprises five electrically independent electrodes, in DC mode, the switch is configured to connect at least four electrodes of the left group (LG) and / or at least four electrodes of the right group (RG) to the DC voltage source (806).

5. A measurement station according to claims 2 and 4, wherein, in DC configuration, the passive electrode (1003, 1004, 1103, 1104, 1205, 1207, 1305, 1306, 1407, 1408, ...) is situated between two active electrodes.

6. A measuring station according to any one of claims 1, 3 or 4, wherein, in DC configuration, all the electrodes of the left group (LG) and the right group (RG) are connected to the DC voltage source (806).

7. A measuring station according to any one of claims 1 to 6, in which, in DC configuration, one group of electrodes operates as a cathode and one group of electrodes operates as an anode.

8. A measurement station according to any one of claims 1 to 7, further comprising a control unit (810), capable of controlling the DC voltage source (806) and of controlling a measurement circuit (812) enabling, in particular, the control unit (810) to measure the current flowing through the user's feet.

9. A station according to any one of claims 1 to 8, in which the electrodes are spaced apart from one another along the length of the measuring station, the user's feet being positioned, in normal use, along the length of the measuring station, and / or the end electrodes along the length are wider.

10. A measurement station according to any one of claims 1 to 9, wherein, for a group of electrodes, the electrodes configured to be active in DC mode cover, in terms of surface area (Sa), at least 50% of the surface area (Se) of the convex envelope defined by all the electrodes of the group, and / or the distance (Dmax) between the end electrodes, including the electrodes themselves, along a length of the measuring station is at least 20 cm, the user's feet being positioned during normal use along the length of the measuring station.

11. A measurement station according to any one of claims 1 to 10, in which the electrodes of the left group extend along a width of the measuring station (100) over more than 40% of the width of the measuring station and the electrodes of the right group extend along a width of the measuring station over more than 40% of the width of the measuring station.

12. A measuring station according to any one of claims 1 to 11, wherein the electrodes of the left and right groups comprise an indium tin oxide (ITO) material.

13. A measuring station according to any one of claims 1 to 12, wherein the DC voltage source is configured to selectively apply to a pair of electrodes, referred to as active electrodes, successive constant voltage steps, said electrodes of the pair constituting an anode and a cathode, wherein, for example, the voltage values of the successive steps are decreasing and / or last between 500 ms and 2 s each.

14. A measuring station according to any one of claims 1 to 13, further comprising a weight sensor.

15. A measuring station according to any one of claims 1, or 3 to 14, comprising: - a base (102) comprising the left electrode group (LG) and the right electrode group (RG), - a handle (110) with at least one electrode capable of coming into contact with the hand, in which, in DC mode, the switch (566) is configured to connect all the electrodes of the base (102) to the terminals of the DC voltage source (806) and to connect the electrode of the handle (110) to a high impedance (HiZ) of more than 500 kOhm.