WO2019063925A1

WO2019063925A1 - Device forming an item of personal protective equipment for persons moving in an electrical risk area

Info

Publication number: WO2019063925A1
Application number: PCT/FR2018/052345
Authority: WO
Inventors: El Mehdi BADANE
Original assignee: Ineo Hauts-De-France
Priority date: 2017-09-26
Filing date: 2018-09-25
Publication date: 2019-04-04
Also published as: FR3071652A1; FR3071652B1

Abstract

The invention relates to a device forming an item of personal protective equipment for a person likely to move in an area where electrical risk is present, comprising a main body incorporating an electronic circuit, at least one inductive sensor and at least one electric field sensor, remotely sensing the presence of an electromagnetic wave, and an alarm triggering once a predetermined electromagnetic threshold and/or a safety distance is exceeded, the inductive sensor being capable of detecting the direction of propagation of the electromagnetic wave, the device comprising at least two indicators of direction of propagation of the wave, connected to the sensor in order to supply the person with a piece of information on the direction of propagation of the detected wave and/or an instruction on the direction of retreat for the person.

Description

DEVICE FORMING INDIVIDUAL EQUIPMENT FOR PROTECTING PEOPLE EVOLVING IN AN AREA OF ELECTRICAL RISK

TECHNICAL FIELD OF THE INVENTION

The invention relates to the field of devices forming personal protective equipment for persons operating in an electrical hazard zone.

The invention relates more particularly to the use of such devices by operators involved in their professional environment, in or near installations with low or high voltages, or by persons working in the private sector on electrical installations. .

The invention also relates, particularly for operators involved in electrical installations with a high risk to their health, a safety management system.

STATE OF THE ART AND ITS DISADVANTAGES

Interventions by people in professional or private settings on or near electrical installations present risks that can be serious for their health or even their lives. Electrical accidents occur mainly during operations on low voltage or high voltage electrical installations (delivery station, cabinet, cabinet, power outlet, circuit breaker, lighting, live bare parts, etc.) during the use of power tools, or when working on or in the vicinity of overhead lines, transformer stations and buried pipelines.

Unfortunately, every year, several operators die electrocuted following an intervention on an electrical installation (4000 accidents in France reported in 2016).

It has been determined that the first minutes after an accident are very important for the chances of survival: it is necessary to act very quickly, on the one hand by cutting the current of the installation without touching the body of the victim, of on the other hand, by immediately warning the helpers. In addition, accidents related to electricity can cause fires or explosions, which can aggravate exponentially the original accident.

There are several devices for checking the presence of voltage, such as the V.A.T "Voltage Absence Checker". It allows to indicate by an audible and visual signal the presence of tension. In order to proceed to the V.A.T, an operator must follow a strict procedure in 5 steps "according to the French standard C18510

"

• Check the E.P.I

• Port of E.P.I · Test V.A.T

• Check presence of voltage between phase, neutral & earth

• Test the V.A.T

If there is no voltage detected, the technician can intervene safely.

In case of voltage detected, the technician must set up the necessary means for the recording. This VAT device gives a relatively good satisfaction since it was integrated by the operators as part of their intervention process.

However, it has various disadvantages since it is seized before the intervention and unsolicited during the intervention while the surrounding conditions in terms of voltage could change.

In addition, it does not have a means of emergency warning in the event of exposure of the operator to an electrical hazard, while the first minutes after an accident are very important for the chances of survival; a victim with an intensity of 30 mA for 30s, with significant risk of ventilatory paralysis.

It is therefore necessary to act very quickly, on the one hand by cutting the current, without contact with the body of the victim to avoid an electrocution of the person wishing to help, and on the other hand by immediately preventing the help.

However, faced with the distress of the person electrified, and given the stress that it generates for the person wishing to help, the latter is even less able to identify the source of the current to be cut, of be sufficiently operational to cut it, within a period of less than 30 seconds while preventing the rescue.

Also known is US2017 / 0205454 which discloses a personal voltage sensing system comprising a plurality of portable electric field sensors. Each sensor is adapted to be worn on an outer side of a user 's body, each facing a different direction. Each sensor includes a transducer detection electric field and transmits a wireless signal representing field strength for an associated direction. An alert device is in operative communication with the plurality of sensors and includes a control configured to monitor the field strength for each sensor. The alert device determines the existence of an alarm condition in response to a field strength greater than a preselection level and generates an alarm signal indicating the associated direction of the alarm condition.

The aim of this solution of the prior art is to provide an omnidirectional detection lobe, and this document proposes to supplement the individual device with accessory sensors, communicating with the individual device by radio frequency. These additional sensors are arranged on different parts of the body, for example on a garment. This system makes it possible to know the intensity of the field captured by each of the sensors. These sensors do not provide information on the direction of the field, but only on the intensity of the locally detected field. This information is transmitted to the device which displays for each of the sensors the detection or not of a field and possibly the intensity measured by each of the sensors. The device does not make it possible to determine the direction of the electrical source. The absolute intensity detected by each sensor does not make it possible to determine the direction of the source, because the sensors can be positioned in any way and not to form an orthonormal repository.

In addition, the measurement of each sensor can be disturbed by a metal mass disposed in proximity. This solution of the prior art makes it possible to provide the user not only with information on the presence of a risk, but not with the direction of the dangerous electrical source and / or the direction of leakage to move away from the source. dangerous electrical. The use of this type of known solution can therefore lead to a paradoxical result of precipitating the escape of the operator towards the danger.

Patent FR2786068 is also known which describes a protection device which comprises:

an antenna with conductive tracks distributed over the surface of the garment,

at least one electric field sensor, and or thermally sensitive detectors electrically connected to the antenna array and intended to deliver a measurement signal representative of the electric current generated in the antenna array in the presence of an electric field or a heat source outside the garment,

and an electronic detection circuit equipped with alarm means to warn the wearer of the garment when the measurement signal is greater than a first alert or danger threshold, or less than a second threshold in the event of non-operation of the protection system.

The measurement of the electric field is performed using a capacitor, or a Hall effect switch connected to the antenna array. The thermosensitive detectors for detecting a heating zone may consist of infrared photodiodes or thermostatic switches distributed over the antenna array. Also known is patent application US2004 / 068174 for measuring magnetic fields with induced body currents of more than 10 mA / m ² in the brain and the central nervous system, and patent application US2013 / 153335 concerning the protection of a user of an aerial lift, as well as than

the patent application EP3124983 describing an individual security system comprising a housing configured to be fixed to a protective helmet, in which there is arranged a voltage detector configured to detect an ambient electric field; a signaling system configured to transmit a signal signal to an individual if the voltage detector detects an ambient electric field greater than a detection threshold; a lighting system; a securing device coupled to the housing and configured to secure the housing to a protective helmet at a location adapted to illuminate around the individual when the latter is wearing the helmet on his head, US Pat. No. 5,298,644 describing a device for avoiding a helmet; electrical contact comprises an inductive plate coupled directly or capacitively to the user and coupled to a detector circuit which derives a continuous signal corresponding to a voltage induced in the body of the user by a high-voltage electrostatic field radiated. A comparator compares the DC signal with a reference signal representing the potential difference between the inductor and the reference plates and activates an alarm if the detected signal exceeds a preselected reference level.

DISADVANTAGE OF THE PRIOR ART The solutions of the prior art make it possible to inform the operator of the strength of the detected voltage and therefore of the importance of the risk to which he is exposed, but leaves him with no information enabling him to go into action. outside the danger zone detected.

The invention provides a solution to respond to the technical problem concerning the signaling, in an integrated device, of the presence of an electrical hazard, but also of the direction of the dangerous electrical source and / or the direction of leakage. OBJECT OF THE INVENTION

In order to overcome these drawbacks, the invention proposes a device forming an individual protection device for a person likely to evolve in a zone of electrical hazard presence, comprising a main body integrating an electronic circuit, at least one inductive sensor and at least one electric field sensor, remotely sensing the presence of an electromagnetic wave and an alarm triggering as soon as a predetermined electromagnetic threshold and / or a safety distance is exceeded. For this purpose, and according to a first aspect, the inductive sensor is able to detect the direction of propagation of the electromagnetic wave, the device comprising at least two wave propagation direction indicators connected to the sensor to provide the person with information on the direction of propagation of the detected wave and / or a reversing direction instruction for the person.

The invention may furthermore exhibit one or more of the following interesting aspects: the inductive sensor is of the three-axis inductive sensor type such as a Hall effect sensor and the wave propagation direction indicators electromagnetic are connected to the sensor to indicate different information when the direction of propagation of the electromagnetic wave is detected as evolving along the three axes. the device comprises a plurality of inductive sensors arranged at different locations within the main body and the direction indicators are arranged at different corresponding locations so as to indicate the direction in which the wave is detected and / or a reversing direction setpoint for the 'operator. the inductive sensors are four in number and arranged along the cardinal points. the propagation direction indicators of the wave are of the visual indicator type such as diodes.

The device comprises modules for processing the signal and / or triangulating the measurements made by the sensor (s) and / or sound sensors in order to refine the determination of the direction of propagation of the wave carried out by the sensors and / or to measure its characteristic quantities such as the speed of propagation and / or the duration of exposure of the person to the wave, the main body of the device is flexible so as to be able to follow the movements of a person's limb and the electronic circuit has a flexibility compatible with the flexibility of the main body. the electronic circuit is overmolded on the main body. the electronic circuit is separable from the main body by being inserted without attachment to a pocket secured to the main body. the main body is in the form of a glove. the device includes an energy storage battery ensuring its operation, rechargeable by wireless transmission of energy. the device includes a heart rate sensor protruding from one of the outer surfaces of the main body so as to come into contact with the person's skin to measure the person's heart rate. the device comprises a control unit for verifying the correct positioning of the device collecting and analyzing the measurements of the heart rate sensor and emitting a signal if the measured heart rate does not conform to a predetermined profile. the device comprises a current sensor projecting from one of the outer faces of the main body so as to come into contact with the person's skin in order to measure whether the current flowing through the person has exceeded a threshold value. the device comprises geolocation means and remote communication means with an external terminal for communicating to the terminal the coordinates of a person when the threshold value has been reached or a non-compliant heart rate profile has been detected.

The invention also relates to a safety management system in an area including an installation traversed by an electric voltage and whose electric current is likely to be interrupted by a breaker with reset / reset handle, the system comprising the device and an independent module to be mounted on the circuit-breaker to modify its state by acting on the shut-off / reset handle, the module integrating a movable actuator between a rest position and an active position of movement of the circuit breaker handle to the cut-off position, and means of remote communication with the device, so as to switch to the active breaker circuit breaker position when a current exceeding a threshold value is detected by the current sensor or a non-compliant heart rate profile has been measured by the heart rate sensor.

The invention also relates to a system comprising a vehicle moving in the zone, such as a nacelle cabin, whose movements can be interrupted by an emergency stop button type "stop nacelle", and an independent module to mount the emergency stop button of the vehicle to modify its state by acting on the cut / reset lever, the module integrating a movable actuator between a rest position and an active position of movement of the button to the position emergency stop, and means of remote communication with the device, so as to switch to the active position of emergency stop of the movements of the vehicle when a current exceeding a threshold value is detected by the current sensor or a non-compliant heart rate profile was measured by the heart rate sensor.

BRIEF DESCRIPTION OF THE FIGURES Other objects and advantages of the invention will become apparent from the following description, with reference to the appended figures, in which: FIG. 1 represents a front side view (a), a rear side (b), from above (c) and in perspective (d) a first variant embodiment of a device forming an individual protective equipment for an operator according to the invention in the form of a medallion, the figures Ibis and lter illustrate the variation respectively of the magnetic and electrical field as a function of the distance of the electric cable, the figure lquater represents the real and modeled variation of the electric field according to the FIG. 2 represents the schematic diagram of the electronic circuit, FIGS. 3 to 7 show an independent module to be mounted on a circuit breaker or on a stop gondola. FIG. to cut the power supply of the electrical source of an electrical installation on which an operator must intervene or to stop the progress of the cabin of the nacelle if the operator is detected by the medallion as having been electrified, seen in front perspective ( 3), seen in rear perspective (FIG. 4), seen from the rear (FIG. 5), viewed from the side (FIG. 6), seen from above (FIG. 8 to 10 show the breaking module in place on a circuit breaker seen from the side (FIG. 8) viewed in perspective slightly to the side (FIG. 9), and in place on a "stop-pod" button (FIG. 11 and 12 illustrate operating diagrams of the safety management system according to two variant embodiments, FIG. 13 represents a second variant embodiment of a device forming an individual equipment for protecting an operator according to the invention in the form of a medallion of the device according to the invention.

GENERAL CONTEXT OF THE INVENTION

The invention described by way of non-limiting example relates to personal protective equipment for preventing electrical accidents by the remote detection of the presence of live power cables at a distance of about 30 cm for low voltage and 2 m for the high voltage, and warn the operator by an audible signal and a light signal indicating not only the exceeding of the threshold level of an electric field, but also its direction and / or the direction of leakage to allow the operator to escape from the danger zone in a reflex and secure manner.

In relation to the appended figures, a first aspect of the invention is described which relates to a device forming an individual protective equipment of an operator intervening in the professional setting on a risk electrical installation (FIGS. 1 to 12) and a device protection of a person intervening privately in an electrical installation (Figure 13).

In the first case of protection of an operator intervening in the professional setting on a risk electrical installation, the device according to the invention may take the form of a medallion 1 to be fixed preferentially on the wrist of the operator by means of a bracelet, but can be fixed on the ankle, via an ankle, or on the head of the operator via a safety helmet, the size of it via a belt. DETAILED DESCRIPTION OF AN EXAMPLE OF HOUSING

The medallion is in the non-limiting form of a substantially parallelepipedic housing defining an upper control surface 2, a lower face of contact with the operator 3 and lateral facets 4.

This housing integrates at least one electric field sensor (not shown) and at least one inductive sensor remotely sensing the presence of an electromagnetic wave, connected to an electronic circuit for acquiring the measurements made, integrating into a storage memory reference threshold values for low voltage, high voltage, current and maximum exposure time thereto. The electronic circuit is connected to a visual and / or audible and / or vibratory alarm integrated into the housing which is triggered when an electric field exceeding a threshold value is detected at a distance less than or equal to a minimum safety distance.

The housing comprises on its upper face a stop button, and a button for selecting the voltage range to which the operator may be exposed, so that the corresponding prerecorded thresholds of safety distance and voltage amplitude are selected.

The housing also incorporates several rangefinders (5, 6, 10, 20) arranged on several sides to provide information on the free spaces in the different directions. According to the invention, the inductive sensor or sensors used are chosen capable of detecting the direction of propagation of the electromagnetic wave (for example of the Hall effect type), and the medallion comprises at least two wave propagation direction indicators. connected to the inductive sensor to provide the operator with information on the direction of propagation of the detected wave and / or a reversing direction instruction for the person.

More specifically, as shown in Figure 1c, the upper face of the medallion comprises four visual indicators 6 which may be light emitting diodes (the acronym LED will be used), arranged along the four cardinal points. Four Hall effect sensor inductive sensors and thus intrinsically having the ability to detect the propagation direction of the wave, are connected to the diodes via the electronic circuit of the medallion. The electronic circuit of the medallion performs a mathematical processing of the signals measured by the four Hall effect sensors which makes it possible to determine the direction of propagation of the electromagnetic wave and this propagation direction information is converted into a visual indication by the diodes, which can selectively be turned on according to the determined direction of propagation. A diode can be programmed to materialize by lighting, the location of the danger, or on the contrary, materialize by lighting up the location of the least danger and the recommended direction of removal of the limb (arm, head or leg) of the operator .

This avoids once the danger information has been communicated to the operator, he reacts badly against it by exposing more to this danger. The determination of other parameters on the detected electromagnetic wave, such as its propagation speed can be obtained through signal processing and / or be refined through triangulation.

VARIATION OF MAGNETIC AND ELECTRIC FIELDS

Figure 1a shows the variation of the magnetic field B detected by a sensor and in a direction depending on the intensity of the current flowing through a cable located at a distance of 30 centimeters. The curve shows the measurement results of the magnetic induction B, 30 cm from the line, when the intensity of the current is varied by means of a variable power load. The amplitude of B is well proportional to that of the current, as was expected. As for the electric field E measured under the same conditions, (see Figure lter) its amplitude is virtually independent of the load, which is also a predictable result. The level of the field is 19V / m to 30 cm. This is the value we will use later to adjust the detection threshold of the device. Figure lquater shows the experimental and modeled evolution of the electric field. This evolution is close to the trend curve E = 4311.7 D ^-1 ' ⁵³⁵³

Where E is the electric field expressed in volts per meter and D is the distance in centimeters.

ALTERNATIVE SOLUTION FOR DETERMINING THE DIRECTION OF PROPAGATION Another solution of the invention for determining the direction of propagation of the electromagnetic wave is to use not a plurality of Hall effect inductive sensors, but a single three-axis magnetic sensor. In this case, this three-axis magnetic sensor 7, preferably used for the embodiment intended for the general public, and illustrated in FIG. 13, will be associated with three diodes indicating respectively the forward / backward, lateral and above / in directions. below.

It is also possible to combine within the same medallion, the different types of magnetic sensors: For low voltage, the medallion will be equipped with four three-axis magnetic field sensors. Depending on the detection axis, an LED will light up to alert the speaker and indicate the direction of the magnetic field (for example, a single LED that lights up when the live part is detected remotely and without contact, if the LED 61 of Figure l lit, it means that the live part is in front and that to avoid direct contact, the operator must back). The sensors will be configured to ideally detect only low voltage electrical parts at a distance of less than 30 cm.

For high voltage, the medallion will be equipped with a 3-axis high sensitivity magnetic field sensor and in case of detection, the four LEDs will light up. Or, the medallion will be equipped also for the high voltage of several sensors of magnetic fields with high sensitivity to indicate precisely the direction of the danger. The sensor should ideally only detect high voltage electrical parts at a distance of less than 2 m. The medallion sensors will be highly sensitive to detect live electrical cables at a distance according to the NF C18-510 standard:

Low voltage, 0 to 1000V: 30 cm

- High voltage, 1000V to 50000V: 2 m On its underside, the medallion 1 comprises projecting thereof, a current sensor 8 intended to come into direct contact with the skin of the operator, passing through a opening made in the support (bracelet, anklet, helmet, belt ...) on which is mounted the medallion, and a heart rate sensor 9 also projecting from the face back, to come into contact with the operator and measure his heart rate.

The presence of the current sensor on the medallion and keeping it in contact with the operator makes it possible to detect if the latter has been the victim of an electrical accident and has been traversed by a current, to measure the current to which it has been exposed and the time of this exhibition, which may be recorded in the memory of the electronic circuit or communicated to a remote database. The current sensor and the local alarm of the medallion cooperate via the electronic circuit, to trigger the local alarm as soon as a predetermined current threshold and / or as soon as a safety distance and / or an exposure time is exceeded. / are crossed.

The medallion will also be provided with suitable telecommunication means, RF antenna type, Bluetooth®, wifi to communicate as soon as the local alarm of the medallion is triggered due to current detection exceeding the threshold, a remote alarm to a terminal of remote security, such as a terminal or a guard station server, a mobile terminal of a site manager or a backup means terminal.

SCHEMATIC DIAGRAM

Figure 2a shows a simplified block diagram of the electronic circuit. It comprises electromagnetic field sensors (100, 200) each associated with an amplifier (HO, 210), a filter (120, 220) eliminating the parasitic signals and a detector (130, 230) delivering the wanted signal.

The magnetic field sensor may be a Hall effect probe or a magnetic loop made by turns of wire wrapped around a ferromagnetic core with a high relative magnetic permeability.

However, the preferred solution relates to capacitive-type electric field sensors. The sensor (100, 200) is for example formed by two coplanar metal blades with a dimension of 2.5 × 1 cm, the two blades being separated by an insulating layer to form a capacity of a few picofarads, for example 2 picofarads and an impedance about 1.5 x 10 ⁹ ohms. The amplifier (110) has an input impedance matching stage assembled as a follower to limit attenuation of the signal produced by the electromotive force of the antenna.

The filter (120, 220) is a selective bandpass filter with a median frequency of 50 Hz bandwidth of 50 to -3 dB and an attenuation of 60 dB per decade.

A rectifier (130, 230) includes a second voltage-adjustable gain amplifier of 3 (9.5 dB) providing a sinusoidal signal which is then converted to a continuous signal by peak detection.

The signals from the magnetic field sensor (s) are operated by a circuit (150) comprising threshold comparators triggering a signal if the measured field is exceeded by a threshold greater than or equal to 20 V / m. If exceeded, the circuit (150) controls the activation of a sound and / or visual warning module (160), as well as the display of the direction of the detected field. This module can receive as input the information from the telemetry probes (300) and / or the heartbeat sensor (400).

The circuit (150) also performs a voltage-adjustable windowing treatment (for example a window of 200 mV) which makes it possible to avoid unwanted blinking as a function of the residual ripple of the filtering and the variation of the field around the operator. This treatment commands the maintenance of the alert for a variation of approximately 3 to 4 V / m below the set threshold. The alert module (160) is deactivated when the detected field is less than 16 V / m. EXTERNAL MODULE

According to FIGS. 3 to 9, a module external to the medallion may be mounted upstream of the intervention of the operator on the circuit-breaker of the electrical power supply of the installation or the zone on which it intervenes, in order to modify it. the state by acting on the shut-off / reset lever to cut off the power supply immediately or at the latest within five seconds of the detection of an electrical accident by the current sensor of the medallion.

This module is in the general form of an open box 11 defining in cross section a C shape whose ends 12 fit above and below the circuit breaker (see Figures 8 and 9) and whose central portion is provided with a projecting actuator 13 of the compression spring type movable between a constrained high rest position in which it leaves the lever 14 free to occupy the reset position (FIGS. 8 and 9) towards a released low position in which it forces the handle 14 of the circuit breaker to adopt a cut-off position thus cutting off the power supply. Two lateral tabs L-shaped cross section 16, better visible in Figures 5 and 7 allow a lateral blocking of the module on the circuit breaker.

The medallion and the cut-off module communicate via intrinsic means of communication type RF wave to trigger the movement of the actuator when a critical current threshold has been measured by the current sensor medallion. The module according to the invention may also be mounted on an emergency stop button of a vehicle such as a nacelle cabin moving in height as soon as a critical current threshold has been measured by the current sensor of the vehicle. medallion. The actuator 13 moving to its active position will engage the emergency stop button 16 to control the stopping of the cabin in accordance with Figure 10.

The module 11 may also be provided with a "test" button 17 mechanically connected to the actuator to pass it when it is activated, from the prestressed inactive position, to the active position, and which will make it possible to check the correct operating the actuator manually and resetting it before the intervention.

With reference to FIG. 11, the safety management method implemented by the system according to the invention is described:

According to the insert a) prior to its operation, the operator sets up a first security module 11 on the circuit breaker of the power supply of the installation where it must intervene, and if necessary, a second module on the button. emergency stopping of the movements of the cabin (for example a nacelle) which it must take during the intervention.

At the beginning of the intervention in the electrical medium (box b) the operator provided with his medallion as described above 1 selects the voltage range of his intervention by activating the button of the medallion provided for this purpose (low voltage or high voltage) .

This selection will establish the critical voltage thresholds, and the minimum safe distances to be complied with which will be used as triggering instructions for alarms during the intervention (box c).

The proper placement of the medallion will be checked first (inset 1) by following the measurements provided by the heart rate sensor 9: if no heart rate is detected at this stage, it is that the back face and current and / or heart rate sensors are not in contact with the operator and it can be expected that a local alert (LED, audible signal or buzzer medallion) sounds as long as the operator has not repositioned the medallion correctly.

Throughout the intervention, the measurements of the heart rate sensor will be monitored (inset m) and if a low or high threshold is reached or exceeded, a remote alert will be issued via the medallion's communication means to the safety coordinators. provided for this purpose (Supervisor, prevention officer, operator nearby, rescue) with sending the GPS position of the operator according to the geolocation means of the medallion.

In parallel, the monitoring of the respect of the safety zone will be followed in real time by taking measurements of the electric field, magnetic field amplitude and electromagnetic wave direction, and deducing the current distance from the operator. screw of a voltage source. If a set safety distance is not respected, a local alert will be triggered on the medallion (insets d and h) to warn the operator of the presence of danger. In addition, the LEDs provided on the upper side of the medallion will provide information on the location of the danger and / or on the direction of withdrawal / recoil to adopt (the operator having previously been trained to interpret the signals of the LEDs).

Once an alert of this type has been locally triggered, the magnetic field measurements, distance and exposure time will be recorded in a database (box i) and notifications including this information and the coordinates of the operator as provided by the medallion, will be sent to the security assistants provided for this purpose, via the means of communication of the medallion .

At the same time, if the current sensor of the medallion detects a current exceeding a threshold value, a local alert is triggered (insert d), the evolution of the recorded current to know the duration and the amplitude of the exposure (insert g). and a notification sent to security coordinators and prevention officers, along with the operator's geolocation data. The modules installed on the circuit-breaker and on the nacelle cutter will eventually cut off the power supply to the installation / part and that of the nacelle cabin in a short time (less than 5 seconds).

In the variant where the housing comprises telemetry sensors, the information relating to the presence of obstacles (walls, walls, etc.) makes it possible to improve the determination of the direction of leakage, taking into account: the general direction where the electric field is the weakest,

The specific direction where the distance of the obstacles is the most important.

Figure 12 illustrates more precisely how alert information notifications are communicated depending on whether there is a type 4G network or not. If there is one, the medallion will communicate with the safety assistants terminals via this network the notifications and GPS coordinates (inset j) relative to electrification accidents as detected by the current sensor (inserts dg) and / or to case of non-compliance with the safety zone (inserts d, h, i above), and / or in case of abnormal heart rate detected (not shown).

The housing includes an option of a heartbeat sensor. By way of non-limiting example, such a sensor implements one or more LEDs, which emit light towards the skin and on a photo-receiver which receives the return light signal. The skin consists of three distinct layers: the hypodermis, the dermis and the epidermis. The dermis is vascularized, it contains many capillaries filled with blood. When the heart pumps blood, it modulates slightly the amount of blood present in the dermis. The known principle of such sensors is to send green light into the capillarized area and, depending on the level of reflected light, the sensor will be able to determine the blood flow and therefore the heart rate. The wavelength of light is chosen to be absorbed by the blood. The blood drawn in the capillaries will modulate this light which will be re-emitted by the skin and captured by the photoreceptor. This type of measurement is referred to as photoplethysmography (PPG). The signal is then processed by algorithms that separate the measurement noise from the heart rate.

In the context of the present invention, additional filtering will be applied, at the output of the signal / noise level improvement filter, to distinguish:

Slow heart rate variations, over a time interval greater than one second representative of a risk of malaise,

Sudden changes in heart rate, over a time interval less than a second, representative of a situation of electrification of the operator.

Ideally, the medallion will be able to use a mobile terminal of the operator as communication relay with the terminals of the assistants. Operator terminals may be provided with a mobile application that will collect important notifications and information (real-time GPS coordinates), and those of security assistant terminals, a corresponding mobile application, using a protocol Secure HTTPS guaranteeing the confidentiality of the data that will pass between these terminals via a dedicated secure server. The application loaded on the terminals of the security assistants can restore in the form of tables, graphs, map data collected. This will make it possible to track the number of incidents over a period of time and to view the details provided during each incident. It will also be possible to follow in real time (at a defined rate) the position of the medallions and their status (connected or not) if the mobile application communicates this data. It is also possible to set the sending of mails / sms to security managers when receiving certain alerts (electrification, entry into a perimeter ...). The supply of the medallion can be performed by a battery, a rechargeable battery or by transmitting the surrounding energy wireless (heat, movement, light rays), via a cigarette lighter or sector through a micro-USB port. Figure 13 shows a consumer version of the device according to the invention in that the device is not connected to a power supply module / nacelle, or safety assistants. This device is in the form of a flexible glove 20 of electrical insulating material so as to enhance the comfort and dexterity of the wearer.

Electronics except magnetic field sensors and electric field sensors, and their links, will be carried by a portion attached to the glove, forming a sleeve 21 which reversibly solidifies (for example by a scratch) at the lower end of the glove. This sleeve will carry the electronic circuit which will ideally present a flexibility compatible with the flexibility of the glove, the LEDs, the on / off button. The separation of most of the electronics from the rest of the glove will allow monomatiere recycling.

According to another embodiment, the flexible printed circuit can be inserted into a pocket and overmolded on the glove during its manufacture.

Claims

1. Device forming an individual protection equipment for a person likely to evolve in an electrical voltage presence zone, comprising a main body incorporating an electronic circuit, at least one inductive sensor and at least one electric field sensor , remotely sensing the presence of an electromagnetic wave and an alarm triggering as soon as a predetermined electromagnetic threshold and / or a safety distance is exceeded, the inductive sensor being able to detect the direction of propagation of the electromagnetic wave the device comprising at least two wave propagation direction indicators connected to the sensor for providing the person with information on the direction of propagation of the detected wave and / or a reversing direction instruction for the person.

2. Device according to claim 1, characterized in that the inductive sensor is of the three-axis inductive sensor type and the electromagnetic wave propagation direction indicators are connected to the sensor so as to indicate different information when the direction of rotation. spread

20 of the electromagnetic wave is detected as evolving along the three axes.

3. Device according to claim 1, characterized in that it comprises a plurality of inductive sensors arranged at different locations within the main body and the indicators of

25 direction are arranged at different corresponding locations so as to indicate the direction in which the wave is detected and / or a reversing direction setpoint for the operator.

4. Device according to one of the preceding claims, comprising signal processing modules and / or

Triangulation of the measurements made by the sensor (s) and / or sound sensors to refine the determination of the direction of propagation of the wave carried out by the sensors and / or measuring characteristic quantities thereof such as the speed of propagation and / or the duration of exposure of the person to the wave.

Apparatus according to any one of the preceding claims, wherein the main body is flexible so as to be able to follow the movements of a limb of a person and the electronic circuit has a flexibility compatible with the flexibility of the main body.

6. Device according to one of the preceding claims, characterized in that it comprises a heart rate sensor protruding from one of the outer faces of the main body so as to come into contact with the skin of the person so to measure the person's heart rate.

7. Device according to the preceding claim, comprising a control unit to verify the proper installation of the device collecting and analyzing the measurements of the heart rate sensor and emitting a signal if the measured heart rate does not conform to a profile. predetermined.

8. Device according to one of the preceding claims, characterized in that it comprises a current sensor protruding from one of the outer faces of the main body so as to come into contact with the skin of the person in order to measure whether the current flowing through the person has exceeded a threshold value.

9. Device according to one of the preceding claims, characterized in that it further comprises at least one telemetric sensor.

10. Device according to one of the preceding claims, characterized in that it further comprises a photoplethysmographic sensor.

11. A safety management system in an area including an installation carrying a voltage and whose electrical current is likely to be interrupted by a circuit breaker with reset / reset handle 14, the system comprising the device according to the invention. any of the three preceding claims and an independent module to be mounted on the circuit breaker to modify its state by acting on the cut / reset lever, the module incorporating a movable actuator between a rest position and an active displacement position

10 of the circuit breaker handle to the cut-off position, and remote communication means with the device, so as to switch to the active breaking position of the circuit breaker when a current exceeding a threshold value is detected by the sensor of the circuit breaker. current or a non-compliant heart rate profile has been

15 measured by the heart rate sensor.

12. System according to the preceding claim, comprising a vehicle moving in the area, such as a nacelle cabin, whose movements can be interrupted by an emergency stop button type "stop nacelle", and an independent module to rise

20 on the emergency stop button of the vehicle to change its state by acting on the cut / reset lever, the module incorporating a movable actuator between a rest position and an active position of movement of the button to the position emergency stop, and means of remote communication with the

Device, so as to move to the active position of emergency stop of the movements of the vehicle when a current exceeding a threshold value is detected by the current sensor or a non-compliant heart rate profile has been measured by the heart rate sensor.