Air quality analyzer and analysis method, and mobile communication terminal

Abstract

Air quality analyzer and method, and mobile communication terminal The invention relates to an analyzer and a method for analyzing air quality and a mobile communication terminal. An object of the invention is an air quality analyzer capable of determining, as a function of a backscattered signal captured by a lidar, characteristics of the air, the air quality analyzer comprising: - a controller capable of controlling a sounding, by a lidar of a mobile communication terminal, of the air surrounding the mobile communication terminal, the analyzer determining characteristics of the air around the position of the mobile communication terminal. Thus, the user of the mobile communication terminal can be informed of the quality of the air surrounding him regardless of his position and at any time without the need for additional equipment. Figure for abstract: Figure 1

Description

Title of the invention: Air quality analyzer and analysis method, and mobile communication terminal Technical field

[0001] The invention relates to an air quality analyzer and analysis method and a mobile communication terminal. State of the art

[0002] Air quality analysis is currently carried out using sensors, either fixed on the ground or on board satellites or aircraft.

[0003] Among these sensors: the lidar, that is to say a radar system using light signals. It is a remote atmospheric sounding instrument using optical electromagnetic waves from ultraviolet to infrared. The lidar emits a brief pulse of light corresponding to spatial resolutions of 1 to 100m, generally monochromatic, which propagates in the atmosphere. The emitted radiation will interact with the individuals and molecules of the atmosphere along the line of sight. Part of the scattered light intensity is returned in the opposite direction to the initial light pulse: it is said to be backscattered. This backscattered signal spreads over time proportionally to the distance of the different layers crossed. It is captured, in particular collected through an optic, and possibly transformed by the detector, in particular by an optoelectronic detector into an electrical signal.

[0004] Following the evolution of the use of lasers, the evolution of lidar technology (LIDAR is the acronym for the English term "Light Detection And Ranging") has made it possible to diversify its atmospheric applications. Lidars have thus become reliable industrial tools with applications in air quality. In particular, due to their small wavelength well adapted to the size of particles and / or molecules in the atmosphere, lidars are, in particular, used as sensors to detect fine particles in the atmosphere. Thus, lidar makes it possible to measure the density of certain components: particles, molecules, etc., in particular the mass concentration of particles in a polluted area with possible monitoring of the dispersion of particles in this area.

[0005] In the case of a lidar carried above a fixed position on Earth (either by means of an aircraft or a satellite), the air quality information determined from the survey carried out by the lidar carried out is macroscopic, i.e. it corresponds to a wide area. Furthermore, in the case of an aircraft, the information provided will be punctually since it corresponds to the time of the lidar survey linked to the passage of the aircraft over the surveyed position. Conversely, in the case of a fixed lidar placed at a given position on the ground or on a building, the air quality information determined from the survey carried out by the vehicle-borne lidar is local.

[0006] Consequently, none of these solutions provides real-time air quality information relating to a user's position, particularly when the user is moving. Statement of the invention

[0007] One of the aims of the present invention is to remedy shortcomings of the state of the art.

[0008] An object of the invention is an air quality analyzer capable of determining, as a function of a backscattered signal captured by a lidar, characteristics of the air, the air quality analyzer comprising: - a controller capable of controlling a survey, by a lidar of a mobile communication terminal, of the air surrounding the mobile communication terminal, the analyzer determining characteristics of the air around the position of the mobile communication terminal.

[0009] Thus, the user of the mobile communication terminal can be informed of the quality of the air surrounding him regardless of his position and at any time without the need for additional equipment.

[0010] By mobile communication terminal is meant in particular a smartphone, a 5G tablet, a navigation device or navigator of a land vehicle, etc.

[0011] Advantageously, the air quality analyzer comprises: - a processor capable of determining, based on a backscattered signal captured by the lidar of the mobile communication terminal during the lidar's sounding of the surrounding air, characteristics of the air around the position of the mobile communication terminal.

[0012] Thus, the delay between the time of the sounding of the air surrounding the mobile communication terminal and the time of supply, in particular, to the user of the mobile communication terminal of air quality information based on the sounding carried out is reduced and then becomes minimal (imperceptible to the user). The air quality information is then provided in real time.

[0013] Advantageously, the air quality analyzer comprises: - a calibrator of the data provided by the lidar of the mobile communication terminal based on data provided by a lidar positioned relative to a fixed position of a planet, when the mobile communication terminal is placed at the fixed position.

[0014] Thus, the precision and reliability of the data provided by the lidar of the communication terminal are improved by relying on measurements carried out by a more powerful industrial lidar either placed on the ground or on a building, or transported above this fixed position, for example by a satellite or more punctually by a dedicated aircraft (in particular a meteorological aircraft or an atmospheric study aircraft).

[0015] An object of the invention is also a mobile communication terminal comprising: - a lidar capable of probing the air surrounding the mobile communication terminal, and of capturing, in return from the air probing, a backscattered signal, the lidar of the mobile communication terminal being capable of being controlled by an air quality analyzer, the lidar of the mobile communication terminal providing, on command from the air quality analyzer, a backscattered signal from which characteristics of the air around the position of the mobile communication terminal are capable of being determined by the air quality analyzer.

[0016] Advantageously, the mobile communication terminal comprises: - the air quality analyzer.

[0017] Advantageously, the lidar is capable of being triggered upon request for a measurement of the quality of the air surrounding the mobile communication terminal, the request for measurement of air quality coming from one of the following devices: - a user interface of the mobile communication terminal, the user interface being capable of allowing a user to control the measurement request; - a remote communication device via a communication network to which the remote communication device and the mobile communication terminal are connected.

[0018] Thus, a lidar of a communication terminal used by other applications such as distance measurement or modeling functions can also be used for the analysis of air quality according to the invention since the sounding by the lidar of the communication terminal is triggered to sound the surrounding air upon request from the user to require the measurement of the air quality.

[0019] Advantageously, the mobile communication terminal comprises at least one device among the following: - a user interface capable of reproducing air quality information based on the air characteristics determined by the air quality analyzer, - a data storage device capable of recording air quality information based on the air characteristics determined by the air quality analyzer as soon as they are determined.

[0020] Thus, the mobile communication terminal indicates directly and, in particular, instantly to its user the quality of the air surrounding this terminal. communication by means of the reproduction device of the mobile communication terminal.

[0021] And, the storage device of the mobile communication terminal allows the user of the mobile communication terminal to subsequently consult his exposure to polluted air by means of the air quality data surrounding this communication terminal recorded by the mobile communication terminal at each survey of the air surrounding the communication terminal. This consultation of the history of the air quality information around the mobile communication terminal can be carried out directly by means of the reproduction device of the mobile communication terminal or on a remote communication terminal such as a computer, a tablet, etc.

[0022] An object of the invention is also a method for analyzing the quality of the air around the position of a mobile communication terminal comprising: - order a survey, by a lidar of the mobile communication terminal, of the air surrounding the mobile communication terminal, the characteristics of the air being determined based on a backscattered signal obtained by the survey and captured by the lidar of the mobile communication terminal.

[0023] Advantageously, the analysis method comprises: - probe the air using the lidar of the mobile communication terminal.

[0024] Advantageously, the analysis method comprises: - determine the characteristics of the air around the position of the mobile communication terminal based on the backscattered signal obtained by the survey.

[0025] Advantageously, the analysis method comprises: - trigger at least one survey upon request for a measurement of the quality of the air surrounding the mobile communication terminal.

[0026] Advantageously, the analysis method comprises: - generate an air quality map based on the air characteristics determined for several successive positions of the mobile communication terminal.

[0027] Thus, a navigator of a land vehicle connected to a mobile communication terminal according to the invention can modify, based on the generated air quality map, a route in order to reduce the exposure to polluted air of the passengers of the land vehicle.

[0028] Advantageously, the analysis method comprises: - trigger the reproduction by the mobile communication terminal of air quality information based on the determined air characteristics.

[0029] Advantageously, the analysis method being implemented by one of the following devices: - the mobile communication terminal; - an air quality measurement manager connected to several mobile communication terminals, each equipped with a lidar; - an air quality monitoring service provider connected to several mobile communication terminals, each equipped with a lidar.

[0030] Advantageously, according to an implementation of the invention, the different steps of the method according to the invention are implemented by software or computer program, this software comprising software instructions intended to be executed by a data processor of a device forming part of an air quality analyzer and being designed to control the execution of the different steps of this method.

[0031] The invention therefore also relates to a program comprising program code instructions for executing the steps of the air quality analysis method according to the invention when said program is executed by a processor.

[0032] This program may use any programming language and be in the form of source code, object code, or intermediate code between source code and object code, such as in a partially compiled form or in any other desirable form.

[0033] An object of the invention is also an air quality measurement manager connected to several mobile communication terminals comprising a lidar capable of probing the air surrounding the mobile communication terminal, and of capturing, in return from the air probing, a backscattered signal, the air quality measurement manager being capable of determining characteristics of the air around the positions of the connected mobile communication terminals as a function of backscattered signals captured by the lidars of the connected mobile communication terminals on command. Brief description of the drawings

[0034] The characteristics and advantages of the invention will appear more clearly on reading the description, given by way of example, and the figures relating thereto which represent:

[0035] [Fig.l], a simplified diagram of an air quality analyzer according to the invention,

[0036] [Fig.2], a simplified diagram of a mobile communication terminal according to the invention,

[0037] [Fig.3], a simplified diagram of an air quality analysis method according to the invention. Description of the embodiments

[0038] [Fig.l] illustrates a simplified diagram of an air quality analyzer according to the invention.

[0039] The air quality analyzer 2, 12 is capable of determining, as a function of a backscattered signal sr captured by a lidar 11, 31, characteristics of the air ac. The air quality analyzer 2, 12 comprises: - a controller 21 capable of commanding scmd a survey, by a lidar 11 of a mobile communication terminal 1, of the air 9 surrounding the mobile communication terminal 1, the analyzer 2, 12 determining characteristics of the air ac around the position of the mobile communication terminal posm: ac(posm,t).

[0040] Thus, the user U of the mobile communication terminal 1 can be informed of the quality of the surrounding air iqa regardless of his position posm and at any time t without the need for additional equipment.

[0041] The mobile communication terminal 1 being in particular a smartphone, a tablet, etc. The lidar 11 of the mobile communication terminal 1 is, for example, a lidar embedded in a smartphone in particular for distance measurement or 3D modeling functions which will be used by the invention in addition for measurement functions relating to air quality.

[0042] In particular, the air quality analyzer 2, 12 comprises: - a processor 22 capable of determining, as a function of a backscattered signal sr captured by the lidar 11 of the mobile communication terminal 1 during the sounding by the lidar 11 of the surrounding air 9, characteristics of the air around the position of the mobile communication terminal ac(posm,t).

[0043] Thus, the delay between the instant t of the sounding of the air surrounding the mobile communication terminal and the instant tp of supply, in particular, to the user U of the mobile communication terminal 1 of air quality information as a function of the sounding carried out iqa(sr) is reduced and then becomes minimal (imperceptible to the user): t-tp « 0. The air quality information iqa is then supplied in real time.

[0044] In particular, the air quality analyzer 2, 12 comprises: - a calibrator 23 of the data sr, d(sr) provided by the lidar 11 of the mobile communication terminal 1 as a function of data sr0, d0(sr0) provided by a lidar 31 positioned relative to a fixed position pos0 of a planet, when the mobile communication terminal 1 is placed at the fixed position posm= pos0.

[0045] Thus, the precision and reliability of the data sr, d(sr) provided by the lidar 11 of the mobile communication terminal 1 are improved by relying on measurements sr0, d0(sr0) carried out by a more powerful industrial lidar 31 located at a fixed position posO: either placed on the ground or on a building 3, or transported above this fixed position, for example by a satellite or more occasionally by a dedicated aircraft (notably a meteorological aircraft or an atmospheric study aircraft).

[0046] In particular, an air quality measurement request mst_rq originating in particular from a user interface (not illustrated by [Fig.l]) or from an air quality measurement manager (not illustrated) using for example the mobile communication terminals previously associated with the manager to constitute a network of mobile air quality sensors is received by the controller 21 and triggers the scmd command of the sounding by the lidar 11 of a mobile communication terminal 1 of the air 9 surrounding the mobile communication terminal 1.

[0047] In particular, the controller 21 is connected directly or indirectly to the lidar 11 of the mobile communication terminal 1 to which it commands scmd the sounding of the air 9 surrounding the mobile communication terminal.

[0048] When the analyzer 2 is a device separate from the mobile communication terminal 1, it is connected to the mobile communication terminal 1, in particular to the lidar 11 of the mobile communication terminal 1, in particular via a communication network 8, such as a wired or wireless communication network, local (Ethernet™, Wifi™, Bluetooth™, etc.) or remote (optical fiber, 5G, etc.).

[0049] In particular, the analyzer 2 comprises a communication interface 20, in particular a transmitter, capable of exchanging data and / or commands, such as the scmd probing command, with a communication interface 10, in particular a transmitter, of the mobile communication terminal 1. For example, the analyzer 2 comprises an output interface 202, in particular a transmitter, capable of sending, respectively transmitting, the scmd probing command to the mobile communication terminal 1, in particular to an input interface 101, in particular a receiver, of the mobile communication terminal 1 which receives the sent, respectively transmitted, scmd probing command. Optionally, the communication interface 20 of the analyzer comprises the output interface 202 of the analyzer, and respectively the communication interface 10 of the mobile communication terminal 1 comprises the input interface 101 of the mobile communication terminal 1.

[0050] In particular, the controller 21 of the analyzer 2 is connected to the communication interface 20, in particular to the output interface 202, of the analyzer 2 to which it transmits the scmd polling command. The communication interface 20, respectively the output interface 202, of the analyzer 2 is connected, in particular via the communication network 8, to the communication interface 10, in particular to the input interface 101, of the mobile communication terminal 1 to which it relays the scmd polling command. The communication interface 10, respectively the input interface 101 of the mobile communication terminal 1 is connected to the lidar 11 of the mobile communication terminal 1 to which it relays the scmd probing command from the controller 21. Thus, everything happens as if the controller 21 commanded scmd to the lidar 11 to probe the air 9 surrounding the mobile communication terminal 1 comprising it.

[0051] In particular, the probing command scmd triggers the emission by the lidar 11 of the mobile communication terminal 1 of a light beam fe in the air 9 surrounding the mobile communication terminal 1. The light beam fe emitted by the lidar 11 of the mobile communication terminal 1 encounters in particular particles 91 in the air 9 surrounding the mobile communication terminal 1. These particles 91 reflect at least a portion of the emitted light beam, thus generating a backscattered signal sr. The lidar 11 of the mobile communication terminal 1 picks up the signal sr thus backscattered by the particles 91 of the air 9 surrounding the mobile communication terminal 1.

[0052] The lidar 11 then provides either the captured backscattered signal sr, or data relating to the captured backscattered signal d(sr) directly or indirectly to the air quality analyzer 2, 12 from which the analyzer 2, 12 determines characteristics ac, ac(posm,t) of the air surrounding the mobile communication terminal 1. In particular, the lidar 11 of the mobile communication terminal 1 is connected directly or indirectly to the processor 22 to which it provides either the captured backscattered signal sr, or data relating to the captured backscattered signal d(sr). Thus, the processor 22 determines characteristics ac, ac(posm,t) of the air surrounding the mobile communication terminal 1 as a function of the data sr, d(sr) provided by the lidar 11 to which it is connected.

[0053] In particular, the mobile communication terminal 1 comprises a communication interface 10, in particular a transmitter, capable of exchanging data and / or commands, such as the captured backscattered signal sr, or data relating to the captured backscattered signal d(sr) to the communication interface 20, in particular a transmitter, of the analyzer 2. For example, the mobile communication terminal 1 comprises an output interface 102, in particular a transmitter, capable of sending, respectively transmitting, the backscattered signal sr or data relating to this signal d(sr) to the analyzer 2, in particular to an input interface 201, in particular a receiver, of the analyzer 2 which receives the sent backscattered signal sr or the sent data relating to this signal d(sr), respectively transmitted.Optionally, the communication interface 10 of the mobile communication terminal 1 comprises the output interface 102 of the mobile communication terminal 1, and respectively the communication interface 20 of the analyzer 2 comprises the input interface 201 of the analyzer 2.

[0054] In particular, the lidar 11 of the mobile communication terminal 1 is connected to the communication interface 10, in particular to the output interface 102, of the mobile communication terminal 1 to which it transmits the captured backscattered signal sr or the data relating to the captured backscattered signal d(sr). The communication interface 10, respectively the output interface 102, of the mobile communication terminal 1 is connected, in particular via the communication network 8, to the communication interface 20, in particular to the input interface 201, of the analyzer 2 to which it relays these data sr, d(sr). In particular, the communication interface 20, respectively the input interface 201, of the analyzer 2 is connected to the processor 22 of the analyzer 2 to which it relays the backscattered signal sr captured by the lidar 11 or the data relating to this backscattered signal d(sr) provided by the lidar 11.Thus, everything happens as if the lidar 11 of the mobile communication terminal 1 provided the analyzer 2, in particular the processor 22, with the backscattered signal sr or data relating to this signal d(sr) allowing the analyzer 2, respectively the processor 22, to determine characteristics ac of the air 9 surrounding the mobile communication terminal 1.

[0055] In particular, the analyzer 2, or the processor 22 respectively, is capable of triggering the reproduction of the characteristics of the air ac thus determined, or even of air quality information iqa as a function of these characteristics of the air ac: iqa(ac), more precisely of the air 9 surrounding the mobile communication terminal 1: iqa(ac, posm, t). In particular, the analyzer 2, or the processor 22 of the analyzer 2, comprises an air quality information generator 26 capable of generating air quality information iqa surrounding the mobile communication terminal 1 as a function of the characteristics ac determined by the analyzer 2, or the processor 22 respectively.

[0056] In particular, the air quality information generator 26 is capable of generating an air quality map mpqa as a function of the air characteristics ac determined for several successive positions of the mobile communication terminal.

[0057] In particular, either the analyzer 2 is connected to a user interface 14 capable of reproducing information, in particular a reproduction device 141, directly (illustrated in [Fig.2]) or indirectly, or the analyzer 2 comprises a reproduction device 24. The analyzer 2 or the processor 22 or the generator 26 thus provides, via this connection, to the reproduction device 14, 141, 24 the determined characteristics ac of the air 9 and / or the iqa information on the quality of the air 9 and / or a map mpqa of the quality of the air 9 surrounding the mobile communication terminal 1.

[0058] In particular, the analyzer 2, respectively the processor 22, or even the generator 26, is capable of recording the characteristics of the air ac thus determined, or even the air quality information iqa as a function of these characteristics of the air ac: iqa(ac), more precisely of the air 9 surrounding the mobile communication terminal 1: iqa (ac, posm, t), and / or a map mpqa of the air quality 9. In particular, the analyzer 2, respectively the processor 22, is capable of storing or triggering the storage of the determined characteristics ac of the air and / or of air quality information iqa and / or a map mpqa of the air quality surrounding the mobile communication terminal 1 as a function of the determined characteristics ac of the air by the analyzer 2, respectively the processor 22 in a storage device 25, in particular a memory, a base of data, etc.

[0059] In particular, either the analyzer 2 is connected to a recorder 17 directly or indirectly, or the analyzer 2 comprises a recorder 27. The analyzer 2 or the processor 22 or the recorder 27, 17 thus writes into the storage device 15, 25 the determined characteristics ac of the air 9 and / or the iqa information on the quality of the air 9 and / or a map mpqa of the quality of the air 9 surrounding the mobile communication terminal 1.

[0060] [Fig.2] illustrates a simplified diagram of a mobile communication terminal according to the invention.

[0061] The mobile communication terminal 1 comprises: - a lidar 11 capable of probing the air 9 surrounding the mobile communication terminal 1, and of capturing, in return from the air probing, a backscattered signal sr, the lidar 11 of the mobile communication terminal 1 being capable of being controlled scmd by an air quality analyzer 2, 12, the lidar 11 of the mobile communication terminal 1 providing, on command scmd from the air quality analyzer 2, 12, a backscattered signal sr from which characteristics ac of the air 9 around the position posm of the mobile communication terminal 1 are capable of being determined by the air quality analyzer 2, 12.

[0062] In particular, the mobile communication terminal 1 comprises: - the air quality analyzer 12.

[0063] In particular, the lidar 11 is capable of being triggered on request mst_rq for a measurement of the quality of the air 9 surrounding the mobile communication terminal 1, the request mst_rq for measuring the air quality coming from one of the following devices: - a user interface 14, 140 of the mobile communication terminal 1, the user interface 14, 140 being capable of allowing a user U to command rq_dmd the measurement request; - a remote communication device (not shown) via a communication network 8 to which the remote communication device and the mobile communication terminal 1 are connected.

[0064] This request is in particular periodic (i.e. repeated at a predetermined time interval). Optionally, the time interval for repeating the request is short so as to provide permanent information on the air quality, i.e. continuously. It is thus possible to have one-off information (one-off or periodic request with a long time interval: 12 hours, daily, weekly, etc.) or permanent information (short time interval: of the order of a minute, a second, etc.).

[0065] In particular, the mobile communication terminal 1 comprises at least one device among the following: - a user interface 14, 141 capable of reproducing air quality information iqa as a function of the air characteristics ac determined by the air quality analyzer 2, 12, - a data storage device 15 capable of recording air quality information based on the characteristics of the air determined by the air quality analyzer 2, 12 as soon as they are determined.

[0066] In particular, a user U of the mobile communication terminal 1 requests rq_dmd, via a user interface 14, in particular a user interface of the mobile communication terminal as illustrated by [Fig.2], to the analyzer 12, 2 to perform an analysis of the quality of the air 9 surrounding it. The user interface 14 is in particular connected to the analyzer 12, 2, in particular to the controller 21 of the analyzer 12, 2 directly (when the mobile communication terminal 1 comprises the user interface 14 and the analyzer 12) or indirectly (when two separate devices respectively comprise the user interface 14 and the analyzer 2), for example via a local communication network (not illustrated), such as a wired or wireless communication network (Ethernet™, Wifi™, Bluetooth™, etc.) possibly by communication interfaces (not illustrated) of the respective devices comprising them.

[0067] The analyzer 12, 2 illustrated by [Fig.2] is in particular an air quality analyzer as described in connection with [Fig.l].

[0068] In particular, an air quality measurement request mst_rq originating in particular from the user interface 14, in particular upon request for air quality analysis rq_dmd from the user U, or from an air quality measurement manager (not illustrated) using for example the mobile communication terminals previously associated with the manager to constitute a network of mobile air quality sensors is received by the analyzer 12, 2, in particular by the controller 21 (illustrated by [Fig.l]) of the analyzer 12, 2 and triggers the scmd command of the survey by the lidar 11 of a mobile communication terminal 1 of the air 9 surrounding the mobile communication terminal 1.

[0069] In particular, the analyzer 12, 2, in the example of [Fig.l]: the controller 21 of the analyzer 12, 2, is connected directly or indirectly to the lidar 11 of the mobile communication terminal 1 to which it commands scmd the sounding of the air 9 surrounding the mobile communication terminal.

[0070] When the analyzer 2 is a device separate from the mobile communication terminal 1, it is connected to the mobile communication terminal 1, in particular to the lidar 11 of the mobile communication terminal 1, in particular via a communication network 8, such as a wired or wireless communication network, local (Ethernet™, Wifi™, Bluetooth™, etc.) or remote (optical fiber, 5G, etc.). In particular, the analyzer 2 comprises a communication interface 20 (illustrated by [Fig. 1]), in particular a transmitter, capable of exchanging data and / or commands, such as the scmd survey command, with a communication interface 10, in particular a transmitter, of the mobile communication terminal 1.

[0071] In particular, the communication interface 20, respectively the output interface 202 illustrated by [Fig.l], of the analyzer 2 is connected, in particular via the communication network 8, to the communication interface 10, in particular to the input interface 101, of the mobile communication terminal 1 to which it relays the scmd probing command. The communication interface 10, respectively the input interface 101, of the mobile communication terminal 1 is connected to the lidar 11 of the mobile communication terminal 1 to which it relays the scmd probing command of the analyzer 2, in particular of the controller 21. Thus, everything happens as if the analyzer 2, respectively the controller 21, commanded scmd to the lidar 11 to probe the air 9 surrounding the mobile communication terminal 1 comprising it.

[0072] In particular, the probing command scmd triggers the emission by the lidar 11 of the mobile communication terminal 1, in particular of a light source 112 of the lidar 11, of a light beam fe in the air 9 surrounding the mobile communication terminal 1. The light beam fe emitted by the lidar 11 of the mobile communication terminal 1 encounters in particular particles 91 in the air 9 surrounding the mobile communication terminal 1. These particles 91 reflect at least a portion of the emitted light beam, thus generating a backscattered signal sr. The lidar 11 of the mobile communication terminal 1, in particular an optical sensor 111, picks up the signal sr thus backscattered by the particles 91 of the air 9 surrounding the mobile communication terminal 1.

[0073] The lidar 11 then provides either the captured backscattered signal sr, or data relating to the captured backscattered signal d(sr) directly or indirectly to the analyzer 12, 2 of air quality from which the analyzer 12, 2 determines characteristics ac, ac(posm,t) of the air surrounding the mobile communication terminal 1. In particular, the lidar 11 of the mobile communication terminal 1 is connected directly or indirectly to the analyzer 12, 2, in particular to the processor 22 illustrated in [Fig.l], to which it provides either the captured backscattered signal sr, or data relating to the captured backscattered signal d(sr). Thus, the analyzer 12, 2, where appropriate the processor 22 of the analyzer 12, 2, determines characteristics ac, ac(posm,t) of the air surrounding the mobile communication terminal 1 as a function of the data sr, d(sr) provided by the lidar 11 to which it is connected.

[0074] In particular, the mobile communication terminal 1 comprises a communication interface 10, in particular a transmitter, capable of exchanging data and / or commands, such as the captured backscattered signal sr, or data relating to the captured backscattered signal d(sr) to the communication interface 20, in particular a transmitter, of the analyzer 2. For example, the mobile communication terminal 1 comprises an output interface 102, in particular a transmitter, capable of sending, respectively transmitting, the backscattered signal sr or data relating to this signal d(sr) to the analyzer 2, in particular to an input interface 201 illustrated by [Fig.l], in particular a receiver, of the analyzer 2 which receives the sent backscattered signal sr or the sent data relating to this signal d(sr), respectively transmitted.Optionally, the communication interface 10 of the mobile communication terminal 1 comprises the output interface 102 of the mobile communication terminal 1, and respectively the communication interface 20 of the analyzer 2 comprises the input interface 201 of the analyzer 2.

[0075] In particular, the lidar 11 of the mobile communication terminal 1 is connected to the communication interface 10, in particular to the output interface 102, of the mobile communication terminal 1 to which it transmits the captured backscattered signal sr or the data relating to the captured backscattered signal d(sr). The communication interface 10, respectively the output interface 102, of the mobile communication terminal 1 is connected, in particular via the communication network 8, to the communication interface 20, in particular to the input interface 201, of the analyzer 2 to which it relays these data sr, d(sr). Thus, everything happens as if the lidar 11 of the mobile communication terminal 1 supplied to the analyzer 2, in particular to the processor 22 illustrated by [Fig.l], the backscattered signal sr or data relating to this signal d(sr) allowing the analyzer 2, respectively the processor 22, to determine characteristics ac of the air 9 surrounding the mobile communication terminal 1.

[0076] In particular, the analyzer 12, 2, respectively the processor 22, is capable of triggering the reproduction of the characteristics of the air ac thus determined, or even of air quality information iqa as a function of these characteristics of the air ac: iqa(ac), more precisely of the air 9 surrounding the mobile communication terminal 1: iqa (ac, posm, t), in particular generated by means of an air quality information generator 16, 26, or of an air quality map mpqa generated, by an air quality information generator 16, 26, as a function of the ac characteristics of the air determined for several successive positions of the mobile communication terminal.

[0077] Either the mobile communication terminal 1 comprises the air quality information generator 16, or the analyzer 12, 2 comprises the air quality information generator 26.

[0078] In particular, either the analyzer 12, 2 is connected to a user interface 14, 141 capable of reproducing, in particular to the reproduction device 141, directly or indirectly, or the analyzer 2 comprises a reproduction device 24 (illustrated by [Fig.l]). The analyzer 12, 2, in particular the processor 22 or the generator 16, 26 of the analyzer 12, 2, thus provides, via this connection, to the reproduction device 14, 141, 24 the determined characteristics ac of the air 9 and / or the iqa information of air quality 9 and / or the iqa information of air quality 9 and / or a map mpqa of the quality of the air 9 surrounding the mobile communication terminal 1.

[0079] In particular, the analyzer 12, 2, in particular the processor 22 of the analyzer 12, 2, or even the generator 16, 26 where appropriate, is capable of recording the characteristics of the air ac thus determined, or even the air quality information iqa as a function of these characteristics of the air ac: iqa(ac), more precisely of the air 9 surrounding the mobile communication terminal 1: iqa(ac, posm, t), and / or an mpqa map of the air quality 9. In particular, the analyzer 12, 2, respectively the processor 22 of the analyzer 12, 2, or even the generator 16, 26 where appropriate, is capable of storing or triggering the storage of the determined characteristics ac of the air and / or iqa air quality information and / or an mpqa map of the air quality the air surrounding the mobile communication terminal 1 as a function of the characteristics determined ac of the air by the analyzer 12, 2 in a storage device 15, 25, in particular a memory, a database, etc.

[0080] In particular, either the analyzer 12, 2 is connected to a recorder 17 of the mobile communication terminal 1 directly or indirectly, or the analyzer 12, 2 comprises a recorder 27. The analyzer 12, 2 or the processor 22 of the analyzer 12, 2 or the recorder 17, 27 thus writes into the storage device 15, 25 the determined characteristics ac of the air 9 and / or the iqa information of the air quality 9 and / or a map mpqa of the quality of the air 9 surrounding the mobile communication terminal 1.

[0081] In particular, either the mobile communication terminal 1 comprises the storage device 17, or the analyzer 12, 2 comprises the storage device 27.

[0082] Optionally, the reproduction device 14, 141, 24 receives the air quality information iqa, i'qa read in the storage device 15, 25 in particular by a reader 17, 27h. In particular, either the mobile communication terminal 1 comprises the reader 17, or the analyzer 12, 2 comprises the reader 27. Optionally the reader 17, 27 is a reader / recorder of air quality information in a storage device 15, 25.

[0083] [Fig.3] illustrates a simplified diagram of an air quality analysis method according to the invention.

[0084] The method for analyzing the air quality QAm NZ around the position posm of a mobile communication terminal T comprises: - order LGT_CNT a survey A_SNDG, by a lidar LI of the mobile communication terminal T (LI DT), of the air A surrounding the mobile communication terminal T, characteristics of the air ac being determined as a function of a backscattered signal sr obtained by the survey A_SNDG and captured by the lidar LI of the mobile communication terminal T.

[0085] In particular, the QAm NZ analysis method comprises: - probe A_SNDG air A using the lidar LI of the mobile communication terminal T.

[0086] In particular, the QAm NZ analysis method comprises: - determine the characteristics of the air AC_DT around the position of the mobile communication terminal posm based on the backscattered signal sr obtained by the A_SNDG sounding.

[0087] In particular, the QAm_NZ analysis method comprises: - trigger at least one SNDG_TRG poll upon request of a measurement mst_rq, mst_rq(posm), mst_rq(posmn) of the quality of the air surrounding the mobile communication terminal.

[0088] In particular, the QAm_NZ analysis method comprises: - generate an air quality map MPQA_GN based on the characteristics {ac(posmn,t)]n, of the air A determined for several successive positions posmn of the mobile communication terminal T.

[0089] Optionally, when the analysis method is implemented by an air quality measurement manager and / or an air quality monitoring service provider, the QAm_NZ analysis method comprises: - generate an MPQA_GN air quality map based on one or more of the following data: + characteristics {ac(posmn,t)]n, of the air A determined for several successive positions pos m" of several mobile communication terminals T; + air quality information A generated from d(sr) data provided for several successive posmn positions by the lidars of several mobile communication terminals T. The mobile communication terminals used by the analysis process have subscribed to a centralized service capable of providing information, particularly in the form of an air quality map.

[0090] Note that each navigator of a land vehicle equipped with a lidar and a communication interface capable of transmitting data constitutes a mobile communication terminal source of mobile information on air quality according to the invention and thus contributes to the establishment, i.e. the generation, of an air quality map as described above. The navigator equipped with a lidar and capable of either generating or receiving air quality information, in particular an air quality map, by means of an analysis method as described above, in particular by combining air quality information from several mobile communication terminals, is then capable of establishing, i.e. generating, and / or modifying a map of a route as a function of the combined air quality information, in particular an extended air quality map).

[0091] In particular, the QAm_NZ analysis method comprises: - trigger the reproduction RPR_TRG by the mobile communication terminal T of air quality information iqa, i'qa depending on the air characteristics determined ac.

[0092] In particular, the QAm_NZ analysis method is implemented by one of the following devices: - the mobile communication terminal T; - an air quality measurement manager (not shown) connected to several mobile communication terminals, each equipped with a lidar; - a provider (not shown) of air quality monitoring services connected to several mobile communication terminals each equipped with a lidar.

[0093] In particular, the user U requests rq_dmd in particular by means of the mobile communication terminal T an analysis of the quality of the air surrounding him. In response to this request rq_dmd, the analysis method QAm_NZ, in particular the step of triggering an air survey SNDG_TRG receives a request for a measurement mst_rq, mst_rq(posm), mst_rq(posmn) of the quality of the air surrounding the mobile communication terminal. The measurement request mst_rq(posm), mst_rq(posm n) of the air quality is in particular generated by the communication terminal mobile 1 according to the request rq_dmd of the user U. The measurement request mst_rq includes in particular one or more positions posm, posmn of the mobile communication terminal T corresponding to the position(s) at which the air quality analysis is carried out. These positions posm, posmn are notably used when generating the air quality map MPQA_GN.

[0094] In particular, the triggering of an air sounding SNDG_TRG triggers sndg_trg the control step LGT_CNT of an A_SNDG sounding which controls scmd the A_SNDG sounding by the lidar LI of the mobile communication terminal T of the user U having made the analysis request rq_dmd.

[0095] In the case where the QAm_NZ air quality analysis method is implemented by an air quality analyzer separate from the communication terminal T, the SNDG_TRG air sounding is implemented by a sounding method specific to the communication terminal T, or even to a lidar LI of this communication terminal T. Alternatively, in the case where the QAm_NZ air quality analysis method is implemented by the communication terminal T, the QAm_NZ analysis method comprises the SNDG_TRG air sounding step.

[0096] In particular, the QAm_NZ air quality analysis method comprises: - an emission of a light beam FE_SND into the air A by means of the lidar LI of the communication terminal T, and

[0097] - capture the backscattered signal SR_CPT by air A in response to the beam emission FE_SND light measurement performed by the LI lidar of the mobile communication terminal T.

[0098] In particular, the triggering of an air sounding SNDG_TRG triggers sndg_trg the air sounding control step LGT_CNT which controls scmd 1: - the emission FE_SND of light beam fe by the lidar LI of the mobile communication terminal T of the user U having made the analysis request rq_dmd, and - the SR_CPT capture of the backscattered signal sr by air A in response to this FE_SND emission.

[0099] In particular, the air sounding A_SNDG comprises: - the emission FE_SND of light beam fe, and - the capture SR_CPT of the backscattered signal sr.

[0100] The capture SR_CPT and / or the air sounding A_SNDG then provides the backscattered signal sr or data depending on this backscattered signal: d(sr) at the step of determining the characteristics of the air AC_DT around the position of the mobile communication terminal posm depending on the backscattered signal sr obtained by the air sounding.

[0101] Optionally, the determination of the characteristics of the air AC_DT around the position of the mobile communication terminal posm triggers (not shown) a change in orientation of the emitted light beam to perform measurements of the surrounding air A in several directions. For example, the determination of the characteristics of the air AC_DT requests the user U of the mobile communication terminal, or even to guide the user U to turn the mobile communication terminal T around the position of the mobile communication terminal posm and to request a new measurement cmd_rq to perform a new measurement of the surrounding air A in this new direction.Alternatively and more precisely, when the lidar of the mobile communication terminal is orientable, the determination of the air characteristics AC_DT commands (not shown) a change in the direction of emission of the light beam of the lidar around the position of the mobile communication terminal posm and a new survey A_SNDG for this new direction, in particular by requiring a new measurement mst_rq when triggering the survey SNDG_TRG.

[0102] In particular, the QAm_NZ air quality analysis method comprises: - managing the QA_MNGT air quality information according to the determined air characteristics.

[0103] In particular, the QAm_NZ air quality analysis method comprises: - generating Iqa_GN air quality information as a function of the ac characteristics of the air determined for several successive positions of the mobile communication terminal.

[0104] In particular, the step of managing the air quality information QA_MNGT comprises the generation of the air quality information IQA_GN as a function of the ac characteristics of the air determined for several successive positions of the mobile communication terminal.

[0105] In particular, the step of managing the air quality information QA_MNGT comprises the generation of an air quality map MPQA_GN as a function of the characteristics {ac(posmn,t)]n, of the air A determined for several successive positions posmn of the mobile communication terminal T, or even of the air quality information iqan generated by the step of generating the air quality information IQA_GN for several successive positions posmn of the mobile communication terminal T.

[0106] The air quality information iqa, iqan generated by the step of generating air quality information Iqa_GN and / or the air quality maps mpqa generated by the step of generating air quality maps MPQA_GN constitute air quality information i'qa.

[0107] In particular, the generation of air quality maps MPQA_GN requires mvt_rq the movement of the mobile communication terminal T in order to generate the map for several successive positions of the mobile communication terminal T. In particular, in response to a movement of the mobile communication terminal required mvt_rq, the mobile communication terminal T requires a new measurement mst_rq for this new position posmn+1 distinct from the previous position posmn: mst_rq^pos'^} * ■

[0108] This air quality information i'qa provided either by the generation of air quality information Iqa_GN and / or the generation of air quality maps MPQA _GN are in particular stored IQA_STCK, or reproduced IQA_RPR.

[0109] In particular, the QAm_NZ air quality analysis method comprises: - storing IQA_STCK determined air characteristics ac and / or iqa air quality information and / or an mpqa map of the air quality A surrounding the mobile communication terminal T based on the determined air characteristics ac in a BDIQA storage device, including a memory, a database, etc.

[0110] Thus, the storage is carried out in the device implementing the QAm_NZ analysis method, in particular in the communication terminal T implementing this QAm_NZ analysis method or in an analyzer separate from the communication terminal T, the analyzer implementing this QAm_NZ analysis method.

[0111] As an alternative and / or complementary to the previous IQA_STCK storage step implemented by the QAm_NZ air quality analysis method, the QAm_NZ air quality analysis method comprises: - trigger (not shown) a storage of the determined characteristics ac of the air and / or iqa air quality information and / or an mpqa map of the air quality A surrounding the mobile communication terminal T depending on the determined characteristics ac of the air in a storage device (not shown), in particular a memory, a database, etc.

[0112] Thus, the storage is carried out in the third-party device of the device implementing the QAm_NZ analysis method, in particular in the communication terminal T implementing this QAm_NZ analysis method or of an analyzer implementing this QAm_NZ analysis method, the analyzer being distinct from the communication terminal T. For example, this allows in this second case, the triggering by the analyzer of the storage in the distinct communication terminal T. Or, this allows storage in a remote device, in particular an air quality measurement manager making it possible to aggregate measurements from mobile communication terminals of several users.

[0113] In particular, the QAm_NZ air quality analysis method comprises: - reproduce IQA_RPR of the determined characteristics ac of the air and / or iqa air quality information and / or an mpqa map of the air quality A surrounding the mobile communication terminal T as a function of the determined characteristics ac of the air.

[0114] Thus, the reproduction is carried out in the device implementing the QAm_NZ analysis method, in particular in the communication terminal T implementing this QAm_NZ analysis method or in an analyzer separate from the communication terminal T, the analyzer implementing this QAm_NZ analysis method.

[0115] As an alternative and / or complementary to the previous IQA_RPR reproduction step implemented by the QAm_NZ air quality analysis method, the QAm_NZ air quality analysis method comprises: - trigger RPR_TRG a reproduction of the determined characteristics ac of the air and / or iqa air quality information and / or an mpqa map of the air quality A surrounding the mobile communication terminal T as a function of the determined characteristics ac of the air in particular by the mobile communication terminal T.

[0116] In particular, the reproduction triggering step RPR_TRG triggers rpr_trg(i'qa) a reproduction by the mobile communication terminal T of air quality information: either determined characteristics ac of the air and / or air quality information iqa and / or a map mpqa of the air quality A surrounding the mobile communication terminal T.

[0117] Thus, the reproduction is carried out in the third-party device of the device implementing the QAm_NZ analysis method, in particular in the communication terminal T implementing this QAm_NZ analysis method or of an analyzer implementing this QAm_NZ analysis method, the analyzer being distinct from the communication terminal T. For example, this allows in this second case, the triggering by the analyzer of the reproduction by the distinct communication terminal T. Or, this allows the reproduction in a remote device, in particular an air quality measurement manager making it possible to supervise measurements of mobile communication terminals of several users.

[0118] Thus, the restitution of the air quality information iqa, i'qa on the mobile communication terminal T, in particular a smartphone, or elsewhere in a communication network to which the mobile communication terminal T is connected: for example, another communication terminal of the user U: his computer, his television, etc.; on a screen of an air quality monitoring service provider in particular via screens placed in towns; etc. can take different forms: - a simple categorical indicator (good, poor, bad); - a 2D or 3D map of the surrounding air (up to 5m for example from the position posm of the mobile communication terminal T) using colors representing levels and / or values ​​of air quality information, and / or air quality level curves, etc.

[0119] In particular, the step of managing air quality information QA_MNGT comprises one or more of the following steps: - IQA_STCK storage of air quality information ac, iqa, i'qa; - triggering the storage of air quality information ac, iqa, i'qa; - IQA_RPR reproduction of air quality information ac, iqa, i'qa; - RPR_TRG triggering of the reproduction of air quality information aC, iqa, i'qa.

[0120] In particular, prior to a first determination of air characteristics A_DT, the analysis method QAm_NZ comprises a calibration CLB, also called calibration of the determined characteristics ac and / or of the generated air quality information iqa, i'qa to be delivered. For this calibration step, the mobile communication terminal T is positioned at a position posm corresponding to the fixed position posod of an industrial lidar ILI (not shown), such as a lidar embedded in a vehicle: airplane, satellite, etc. placed above the fixed position pos0 or a “ground” lidar anchored to the fixed position pos0 directly on the ground or on a terrestrial building.

[0121] In particular, when the communication terminal T carrying the lidar LI is at a position posm corresponding to the fixed position pos0 of an industrial lidar ILI, the analysis method comprises the CLB calibration.

[0122] In particular, the CLB calibration includes: - modify MDF_DT the determination of the characteristics AC_DT as a function of the backscattered signal sr captured by the lidar LI of the communication terminal T so that the characteristics ac determined by the analysis method QAm_NZ as a function of the backscattered signal sr captured by the lidar LI of the communication terminal T correspond to the characteristics ac0 of the air around the fixed position pos0 determined as a function of the backscattered signal sr0 captured by the industrial lidar ILI.

[0123] Alternatively and / or additionally, the CLB calibration comprises: - modifying IGN_MDF the generation of the air quality information Iqa_GN as a function of the backscattered signal sr captured by the lidar LI of the communication terminal T so that the air quality information iqa generated by the analysis method QAm_NZ as a function of the backscattered signal sr captured by the lidar LI of the communication terminal T corresponds to the air quality information iqa° of the air around the fixed position pos0 generated as a function of the backscattered signal sr0 captured by the industrial lidar ILI.

[0124] Thus, the results of the QAm_NZ air quality analysis according to the invention will be made reliable by a test or a series of tests (for example in a learning mode) during which the determined air characteristics and / or the air quality information generated by the QAm_NZ air quality analysis according to the invention are CLB calibrated.

[0125] In particular, the CLB calibration is carried out by analyzing the backscattered signal from the LI lidar of the smartphone T in different known pollution situations and by comparing it with the real composition of the air (in particular obtained with one or more more powerful ILI industrial lidars or other air quality analysis methods).

[0126] A particular embodiment of the QAm_NZ air quality analysis method is a program comprising program code instructions for executing the steps of the QAm_NZ air quality analysis method when said program is executed by a processor.

[0127] The invention also relates to a medium. The information medium may be any entity or device capable of storing the program. For example, the medium may comprise a storage means, such as a ROM, for example a CD ROM or a microelectronic circuit ROM or even a magnetic recording means, for example a floppy disk or a hard disk.

[0128] On the other hand, the information medium may be a transmissible medium such as an electrical or optical signal which may be conveyed via an electrical or optical cable, by radio or by other means. The program according to the invention may in particular be downloaded from a network, in particular of the Internet type.

[0129] Alternatively, the information carrier may be an integrated circuit in which the program is incorporated, the circuit being adapted to execute or to be used in the execution of the method in question.

[0130] In another implementation, the invention is implemented by means of software and / or hardware components. In this regard, the term module can correspond to either a software component or a hardware component. A software component corresponds to one or more computer programs, one or more sub-programs of a program, or more generally to any element of a program or software capable of implementing a function or a set of functions according to the description above. A hardware component corresponds to any element of a hardware assembly capable of implementing a function or a set of functions.

[0131] The invention makes it possible to have real-time air quality information near one's position when using a smartphone with an on-board lidar.

[0132] In particular, an air quality measurement manager is connected to several mobile communication terminals comprising a lidar capable of probing the air surrounding the mobile communication terminal, and of capturing, in return for the air probing, a backscattered signal. The air quality measurement manager is capable of determining characteristics of the air around the positions of the connected mobile communication terminals as a function of backscattered signals captured, on command, by the lidars of the connected mobile communication terminals. The lidars of the mobile communication terminals connected to the air quality measurement manager are controlled in particular by the air quality measurement manager and / or respectively an analyzer of the mobile communication terminal comprising the lidar. Thus, when a user of a mobile communication terminal orders the analysis of the surrounding air by his mobile communication terminal, the latter provides data relating to the backscattered signal d(sr) captured by the lidar of the mobile communication terminal, in particular the characteristics of the air determined and / or the air quality information generated by the mobile communication terminal, in particular by the analyzer of the mobile communication terminal, to the air quality measurement manager which combines them with others from other connected mobile communication terminals.

[0133] In particular, the air quality measurement manager is able to command at least one connected mobile communication terminal, in particular to the lidar of this connected mobile communication terminal, to survey the air surrounding it. In particular, the air quality measurement manager comprises an air analyzer as described previously and / or is able to implement an air analysis method as described previously.

[0134] The air quality measurement manager is connected to the mobile communication terminals, in particular via a mobile communication network (4G, 5G, LTE, etc.).

[0135] Furthermore, an air quality measurement manager and / or air quality monitoring service provider comprises a receiver capable of receiving, via a communication network, from several mobile communication terminals T each carrying a lidar, characteristics ac(posm) of the air and / or air quality information iqa(posm), i'qa(posm) from one or more of these mobile communication terminals T. In particular, the air quality monitoring service provider includes the air quality measurement manager.

[0136] In particular, the air quality measurement manager and / or monitoring service provider includes an aggregator capable of grouping the characteristics air ac(posm) and / or air quality information iqa(posm), i'qa(posm) received from one or more of these mobile communication terminals T.

[0137] Thus, the characteristics ac*(posm) of the air and / or the air quality information i*qa(posm), i'qa(posm) provided by the air quality measurement manager and / or monitoring service provider are made reliable by the number of measurements.

[0138] In particular, the air quality measurement manager and / or monitoring service provider comprises an extended map generator based on the air characteristics ac(posm) and / or the air quality information iqa(posm), i'qa(posm) received from one or more of these mobile communication terminals T.

[0139] Thus, the map provided by the air quality measurement manager and / or monitoring service provider is not only more extensive (i.e. greater than 5m around a single posm position) but also made more reliable by the number of air quality measurements for a given position.

[0140] The invention results in particular in a service available on smartphones equipped with lidar and / or navigation devices, also called navigators, of land vehicles equipped with lidar to provide local real-time information on air quality and, possibly, more extensive information by grouping together information from mobile communication terminals activating this air quality monitoring service.

Claims

Claims

1. Air quality analyzer capable of determining, as a function of a backscattered signal captured by a lidar, characteristics of the air, the air quality analyzer comprising: - a controller capable of controlling a survey, by a lidar of a mobile communication terminal, of the air surrounding the mobile communication terminal, the analyzer determining characteristics of the air around the position of the mobile communication terminal.

2. Air quality analyzer according to the preceding claim, the air quality analyzer comprising: - a processor capable of determining, as a function of a backscattered signal captured by the lidar of the mobile communication terminal during the sounding by the lidar of the surrounding air, characteristics of the air around the position of the mobile communication terminal.

3. Air quality analyzer according to one of the preceding claims, the air quality analyzer comprising: - a calibrator of the data provided by the lidar of the mobile communication terminal as a function of data provided by a lidar positioned relative to a fixed position of a planet, when the mobile communication terminal is placed at the fixed position.

4. Mobile communication terminal comprising: - a lidar capable of probing the air surrounding the mobile communication terminal, and of capturing, in return from the air probing, a backscattered signal, the lidar of the mobile communication terminal being capable of being controlled by an air quality analyzer, the lidar of the mobile communication terminal providing, on command from the air quality analyzer, a backscattered signal from which characteristics of the air around the position of the mobile communication terminal are capable of being determined by the air quality analyzer.

5. Mobile communication terminal according to the preceding claim, the mobile communication terminal comprising: - the air quality analyzer.

6. Mobile communication terminal according to one of claims 4 or 5, in which the lidar is capable of being triggered on request of a measurement of the quality of the air surrounding the mobile communication terminal, the air quality measurement request coming from one of the following devices: - a user interface of the mobile communication terminal, the user interface being capable of allowing a user to control the measurement request; - a remote communication device via a communication network to which the remote communication device and the mobile communication terminal are connected.

7. Mobile communication terminal according to one of claims 4 to 6, the mobile communication terminal comprising at least one device among the following: - a user interface capable of reproducing air quality information as a function of the characteristics of the air determined by the air quality analyzer, - a data storage device capable of recording air quality information as a function of the characteristics of the air determined by the air quality analyzer as soon as they are determined.

8. Method for analyzing the quality of the air around the position of a mobile communication terminal comprising: - ordering a survey, by a lidar of the mobile communication terminal, of the air surrounding the mobile communication terminal, characteristics of the air being determined as a function of a backscattered signal obtained by the survey and captured by the lidar of the mobile communication terminal.

9. Method for analyzing air quality according to the preceding claim, the analysis method comprising: - probing the air using the lidar of the mobile communication terminal.

10. Method for analyzing air quality according to one of claims 8 or 9, the analysis method comprising: - determining characteristics of the air around the position of the mobile communication terminal as a function of the backscattered signal obtained by the survey.

11. A method of analyzing air quality according to any one of claims 8 to 10, the analysis method comprising: - trigger at least one survey upon request for a measurement of the quality of the air surrounding the mobile communication terminal.

12. Method for analyzing air quality according to any one of claims 8 to 11, the analysis method comprising: - generating an air quality map based on the characteristics of the air determined for several successive positions of the mobile communication terminal.

13. Method for analyzing air quality according to any one of claims 8 to 12, the analysis method comprising: - triggering the reproduction by the mobile communication terminal of air quality information depending on the determined air characteristics.

14. Analysis method according to any one of claims 8 to 13, the analysis method being implemented by one of the following devices: - the mobile communication terminal; - an air quality measurement manager connected to several mobile communication terminals each equipped with a lidar; - an air quality monitoring service provider connected to several mobile communication terminals each equipped with a lidar.

15. A program comprising program code instructions for performing the steps of the air quality analysis method according to any one of claims 8 to 14 when said program is executed by a processor.

16. Air quality measurement manager connected to several mobile communication terminals comprising a lidar capable of probing the air surrounding the mobile communication terminal, and of capturing, in return for the air probing, a backscattered signal, the air quality measurement manager being capable of determining characteristics of the air around the positions of the connected mobile communication terminals as a function of backscattered signals captured on command by the lidars of the connected mobile communication terminals.

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