EP4445091A1 - Procédé et dispositif de restitution d'une empreinte thermique - Google Patents
Procédé et dispositif de restitution d'une empreinte thermiqueInfo
- Publication number
- EP4445091A1 EP4445091A1 EP22835572.3A EP22835572A EP4445091A1 EP 4445091 A1 EP4445091 A1 EP 4445091A1 EP 22835572 A EP22835572 A EP 22835572A EP 4445091 A1 EP4445091 A1 EP 4445091A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thermal
- light emission
- fingerprint
- emission source
- restored
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
- F41J2/00—Reflecting targets, e.g. radar-reflector targets; Active targets transmitting electromagnetic or acoustic waves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
- F41J9/00—Moving targets, i.e. moving when fired at
- F41J9/14—Cinematographic targets, e.g. moving-picture targets
Definitions
- the subject of the present invention is a process for restoring a thermal fingerprint intended for shooting training and/or observation.
- the invention also relates to the device, or the system, for the implementation of this method.
- thermal fingerprint means here the infrared radiation of any thing, living or not. This is not the common meaning of this expression, which refers to a thermal trace that human beings (at a temperature of around 37°C) in particular, or possibly other living beings, leave on everything they touch and which disappears as it cools little by little, at different speeds depending on the material.
- the invention relates to the technical field of weapons and technical elements used by military personnel, soldiers or the like to carry out shooting training with an infrared vision scope, possibly only observation using infrared vision devices .
- heating modules in other words representations of real targets heated by electrical modules at the different heat-emitting parts of such targets.
- Some of these so-called active targets, implemented by operational fire training centers, are actually fairly consistent with real thermal targets but most of the time there is a noticeable difference between these so-called active thermal targets and real thermal targets. due to the difficulty of reproducing heat with electrical/heating modules, whether human or figurative of objects.
- an essential objective of the invention is to propose a solution making it possible to have a target illumination system whose restitution in the IR goggles - whether they are used for simple observation or for shot - is real and not destructible by practice shots.
- Another essential objective is to offer a technical solution that is more effective and above all less expensive than the solutions of the state of the art.
- the solution proposed by the invention is a method for restoring a thermal fingerprint intended for shooting training and/or observation of thermal targets by a user equipped with an infrared shooting sight and/or observation.
- thermal target means anything that can constitute a target for the user.
- the thermal target can consist of another soldier, a civilian, military equipment such as an all-terrain car, a tank or even a missile launcher.
- thermo camera means any device capable of measuring and recording the various heat waves, infrared radiation, emitted by a body or an object. When looking at the image from a camera thermal, the latter reproduces an image representing the intensity of the radiation, which makes it possible to evaluate the temperature.
- An infrared camera also called a “thermal camera” detects and measures the infrared energy of objects or living beings. The camera converts this infrared data into an electronic image that indicates the apparent surface temperature of the inspected object.
- the representation of the thermal fingerprint according to the invention can also be used in operations in the context of deception maneuvers, i.e. say to make the enemy believe our presence in a position where the soldiers are not.
- the solution according to the invention is particularly inexpensive and easy to implement for operators.
- the light emission source consists of a laser emitter.
- the dedicated support consists of a screen, advantageously flat in a rectangular or square shape.
- the light emission source is coupled with at least one lens which diffracts or filters the light emitted by the light emission source so as to obtain the aforementioned thermal fingerprint returned.
- the lens diffracts or filters the light emitted by the light emission source in a wave range corresponding to the wavelength range perceptible by the infrared vision bezel shooting and/or observation of the user.
- the lens diffracts or filters the light emitted by the light emission source in a wave range between 3 and 20 microns, preferably between 8 and 12 microns or between 3 and 5 microns.
- micrometer is also called micron, symbol p or pm.
- the 8 to 12 ⁇ m range thus conventionally corresponds to the vision wavelength range of rifle scopes and medium-range observation glasses, while the 3 to 5 micron range conventionally corresponds to the range of vision wavelengths of firing systems and long-range spotting scopes.
- the light emission source acts as a source of radiant heat and in that the central unit is also coupled with an infrared camera visualizing the thermal fingerprint reproduced on the screen dedicated so as to transmit back to said central unit an image of said restored thermal fingerprint.
- the central unit modifies or corrects the emission by the light emission source until the restored thermal fingerprint transmitted by the camera corresponds to the initial thermal fingerprint.
- the modification or correction of the thermal image restored by the camera is processed by the central unit pixel by pixel at the level of the light emission source.
- This also relates to a device (or system) for rendering a thermal fingerprint intended for shooting training and/or observation of thermal targets by a user equipped with a vision glasses firing and/or observation infrared, for implementing the method as briefly described above, characterized in that it comprises:
- a source of light emission preferably consisting of a laser emitter
- a central unit capable of controlling the transmission by said light emission source of an initial thermal print taken by a thermal camera on a dedicated support, advantageously a flat screen of rectangular or square shape,
- an infrared control camera connected to the central unit to send it an image of the thermal fingerprint restored by the light emission source so as to modify or correct it if necessary
- a lens for diffracting or filtering the emission from the light emission source so as to obtain the above-mentioned restored thermal imprint, advantageously in a range of waves corresponding to the range of wavelengths perceptible by the user's infrared shooting and/or observation bezel.
- FIG. 1 is a schematic view of a restored thermal fingerprint, front view, according to the method and the device of the invention.
- FIG. 2 is a side view of the device for rendering a thermal fingerprint intended for shooting training and/or observation of thermal targets by a user equipped with an infrared shooting vision bezel and/or observation visible in Figure 1.
- FIG. 3 is a schematic view of the constituent elements of the method according to a first embodiment of the invention.
- FIG. 4 is a schematic view of the constituent elements of the method according to a second embodiment of the invention.
- the thermal camera used to take a thermal image serving as an initial thermal fingerprint, not shown in the appended figures, or to check the restored thermal fingerprint 1 in the context of the second embodiment may consist of a thermal camera capable of operating over a temperature range of at least -20°C to 75°C (Celsius) and an infrared resolution of at least 110016 pixels 382 x 288), typically 307200 pixels (640 x 420).
- the light emission source 2 is advantageously a laser emitter, such as for example a laser diode capable of emitting a coherent light source.
- the laser transmitter 2 may consist of a CO2 laser machine and it is noted that in the second embodiment, in connection with Figure 4, this laser transmitter may consist of a CO2 machine with galvanometric head 3, the laser emitter 2 (laser tube) then being conventionally positioned above or behind the galvanometric head 3.
- the dedicated support 4 may, as shown in Figure 1 or 2, consist of a rectangular flat screen. This screen 4 makes it possible to display the restored thermal footprint 1.
- any natural dedicated support such as a section of wall of a building or a dwelling, can for example advantageously constitute this display means 4 .
- the central unit 5 can consist of any computer system capable of managing the light source 2 by requiring it to emit radiant heat or in a well-defined wavelength, corresponding to the initial thermal footprint, whether according to the first (FIG. 3) or the second (FIG. 4) mode of execution.
- the links between the central unit 5, the light source 2 and possibly the control thermal camera can be wired or wireless, in particular by electromagnetic waves.
- the light source 2 and the dedicated support 4 are shielded, that is to say covered with materials or of elements preventing any damage by training shots.
- all the elements of the device for restoring a thermal fingerprint intended for shooting training and/or observation of thermal targets by a user equipped with an infrared shooting vision bezel and/or observation are advantageously shielded or sheltered in a pit, at the very least all the elements at risk of being hit by bullets or shrapnel, with the notable exception of the dedicated support 4.
- the light source 2 can be detached and moved away from the base 7 depending on the shape and length of the thermal print to be restored.
- the first embodiment illustrated in Figure 3 does not require a control camera 6 because the restored thermal fingerprint 1 is perfect or almost perfect.
- one or more initial thermal imprints capable of serving as thermal targets for shooting and/or observation training have been pre-recorded and prefabricated. These initial thermal fingerprints are thus obtained thanks to the prefabricated lens or lenses, not shown in the appended figures, especially for absorbing specific wavelengths of the emission from the light source so as to obtain a thermal fingerprint restored in a range very/very specific wavelength.
- a lens comes to equip the light emission source 2 or is positioned in front of this light emission source 2 so that the restored thermal fingerprint 1 corresponds to the initial thermal fingerprint, with regard to the wavelength of the user's IR vision glasses.
- this lens replacement or exchange device is controlled by the central unit 5 also managing or controlling the light emission source 2.
- each lens relates to a specific thermal target or initial thermal fingerprint as well as a type of infrared vision goggle used by the user.
- these infrared vision glasses consist either of shooting glasses or observation glasses: the first type of glasses (shooting) is able to detect wavelengths of 8 to 12 microns, generally 10.6 microns, while the second type of (spotting) glasses is able to detect wavelengths of 3 to 5 microns.
- the lenses placed in front of the light emission source 2 can be different in terms of thermal targets (initial thermal fingerprints) and/or in terms of the nature of the length absorption. waves, corresponding to different types of infrared vision goggles.
- the second embodiment, illustrated in Figure 4 relates to a light emission source 2 capable of heating an area, or dedicated support 4, corresponding to an initial thermal footprint (or thermal target).
- the light emission source 2 here consists of a laser emitter 2 with a galvanometric head 3.
- the central unit 5 has a memory with a plurality of initial thermal fingerprints (thermal targets).
- the central unit 5 sends to the light emission source 2 an initial thermal print so that the latter projects a restored thermal print 1 onto a dedicated support 4.
- a thermal camera 6 films the restored thermal fingerprint and sends these images back to the central unit 5.
- the central unit 5 carries out a digital analysis of each pixel of the restored thermal fingerprint 1 and possibly corrects the sending or the command given to the light emission source 2 so that such and such a pixel of the restored thermal print 1 becomes more or less heated so as to correspond exactly to the initial thermal print.
- this second embodiment consists of a servo imaging system in which the restored image (restored thermal fingerprint 1 ) is continuously monitored and possibly corrected to correspond exactly to the initial thermal fingerprint.
- the initial thermal fingerprint - or thermal target - presents a modification of its thermal fingerprint over time, for example with a succession of about ten thermal fingerprints relating to the same target having a slightly different thermal footprint between them.
- These differences between this succession of thermal fingerprints can for example correspond to an indication of the fact that the thermal target is moving, cooling or heating up, or even concealing itself (thermally) temporarily from the sight of the user wearing the safety glasses. IR vision.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- General Engineering & Computer Science (AREA)
- Collating Specific Patterns (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Telescopes (AREA)
- Rehabilitation Tools (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2113207A FR3130362B1 (fr) | 2021-12-09 | 2021-12-09 | Procédé et dispositif de restitution d’une empreinte thermique. |
| PCT/EP2022/084733 WO2023104857A1 (fr) | 2021-12-09 | 2022-12-07 | Procédé et dispositif de restitution d'une empreinte thermique |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4445091A1 true EP4445091A1 (fr) | 2024-10-16 |
| EP4445091C0 EP4445091C0 (fr) | 2026-02-04 |
| EP4445091B1 EP4445091B1 (fr) | 2026-02-04 |
Family
ID=80787494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22835572.3A Active EP4445091B1 (fr) | 2021-12-09 | 2022-12-07 | Procédé et dispositif de restitution d'une empreinte thermique. |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4445091B1 (fr) |
| CN (1) | CN118451293A (fr) |
| CA (1) | CA3238767A1 (fr) |
| FR (2) | FR3130362B1 (fr) |
| WO (1) | WO2023104857A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2067273B (en) * | 1980-01-04 | 1983-09-28 | Gq Defence Equip Ltd | Target training apparatus |
| FR2556827B1 (fr) * | 1983-12-15 | 1988-04-22 | Giravions Dorand | Dispositif d'entrainement au tir en salle |
| US5690492A (en) * | 1996-07-18 | 1997-11-25 | The United States Of America As Represented By The Secretary Of The Army | Detecting target imaged on a large screen via non-visible light |
-
2021
- 2021-12-09 FR FR2113207A patent/FR3130362B1/fr active Active
-
2022
- 2022-12-07 EP EP22835572.3A patent/EP4445091B1/fr active Active
- 2022-12-07 CA CA3238767A patent/CA3238767A1/fr active Pending
- 2022-12-07 WO PCT/EP2022/084733 patent/WO2023104857A1/fr not_active Ceased
- 2022-12-07 CN CN202280081381.3A patent/CN118451293A/zh active Pending
-
2024
- 2024-03-28 FR FR2403219A patent/FR3147361B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN118451293A (zh) | 2024-08-06 |
| FR3147361A1 (fr) | 2024-10-04 |
| FR3130362B1 (fr) | 2024-05-03 |
| CA3238767A1 (fr) | 2023-06-15 |
| EP4445091C0 (fr) | 2026-02-04 |
| FR3130362A1 (fr) | 2023-06-16 |
| FR3147361B1 (fr) | 2025-08-15 |
| EP4445091B1 (fr) | 2026-02-04 |
| WO2023104857A1 (fr) | 2023-06-15 |
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