JP2008224502A - Friend recognition system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein the conventional technology performs friend recognition with respect to one target person, so that, when a plurality of target persons exist, sequential friend recognitions requires time, and the measures delays. <P>SOLUTION: This friend recognition system includes a collimating-side device 1 and a collimated-side device 2. The collimating-side device 1 has a reflection type optical system 5, an image sensor 7 consisting of a thermal type infrared detecting element, and a filter 6 that is disposed between the reflection type optical system 5 and the image sensor 7 and can switch a plurality of kinds of wavelength bands. The collimated-side device 2 can generate a light signal of one of the plurality of kinds of wavelength bands used as the filter 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fellow friend identification device for identifying whether a target is a fellow friend or not.

  Each combatant wears a harness consisting of a photodetector and a control unit, along with a laser assembly installed on the weapon. For battle simulation or recognition, the combatant points a weapon at a fictitious target and sends a laser signal. When the target is another combatant wearing a harness, the harness responds by radio, ultrasonic or optical signal. The carrier frequency of the response signal is determined by the search unit with respect to the laser beam, and what is transmitted has already been disclosed (for example, see Patent Document 1).

JP-A-10-148672 (FIGS. 6 and 11)

  In the conventional technology for identifying a fellow friend, when there are multiple targets in a complicated situation, it takes time because the laser signal needs to be transmitted sequentially to each target in order to recognize the fellow friend. On the other hand, there was a problem that the response was delayed.

  The present invention has been made to solve the above-mentioned problems, and comrades are equipped with a sighting side device that emits infrared light of a specific wavelength, and infrared light of the specific wavelength mounted on a rifle or the like. It is intended to have a sighting-side device that can selectively pick up images and to simultaneously identify all the targets existing in the screen of the sighting-side device.

  The fellow friend identification device of the present invention is a fellow friend recognition device that detects an optical signal of a specific wavelength generated by a sighting side device carried by another person by means of a sight side device carried by one person. Receiving and reflecting optical system, a filter that receives an optical signal reflected from the reflecting optical system, and can switch a plurality of wavelength bands in response to the optical signal, and a thermal infrared detector And a sighting side device capable of generating optical signals in any one of a plurality of wavelength bands used as the filter. .

  According to the colleague identification device of the present invention, the reflection type optical system 5, the image sensor 7 composed of a thermal infrared detection element, and a plurality of types of wavelength bands provided between the reflection type optical system 5 and the image sensor 7 are provided. The sighting side device 1 composed of a switchable filter 6 and the sighting side device capable of generating an optical signal in any one of a plurality of types of wavelength bands used as the filter 6 This makes it possible to simultaneously identify all the targets existing in the screen of the aiming device.

Embodiment 1 FIG.
FIG. 1 is a conceptual diagram showing the operational status of the present invention, wherein 1 is an aiming side device, 8 is an optical signal, and 2a to 2c are aiming side devices.
Each of the comrades of the comrades wears the aiming side device 2a to the aiming side device 2c together with the aiming side device 1 installed on the weapon, for example, somewhere on the body such as a helmet or a part of clothes.

In order to discriminate between the opponent and the fellow friend, each fighter of the fellow friend emits an infrared light signal 8 having a specific wavelength in all directions from the sighted side device 2a to the sighted side device 2c. An infrared image having a wavelength of is generated.
In this generation screen, the target that emits the optical signal 8 is identified as a fellow friend.

  FIG. 2 is a block diagram showing Embodiment 1 of the present invention. 3 is an optical signal generator, 4 is a first filter, 5 is a reflective optical system, 6 is a second filter, 7 is an image sensor, 9 Is a switching mechanism.

  In the first embodiment, the optical signal generator 3 of the sighted side device 2 is a heat source, for example, and emits infrared rays in a wide wavelength range. The first filter 4 selects a specific wavelength from the wavelengths contained in the optical signal emitted from the optical signal generator 3.

The optical signal 8 emitted from the first filter 4 arrives at the aiming device 1 and enters the reflection optical system 5.
The reflective optical system 5 does not generate chromatic aberration unlike a normally used refractive optical system composed of a plurality of lenses, so that infrared rays having a wide range of wavelengths can be imaged on the image sensor 7.

The second filter 6 has a plurality of wavelength bands including the wavelength band of the first filter 4, and the same wavelength band as that of the first filter 4 is selected and used by the switching mechanism 9 when identifying the fellow friends. .

FIG. 3 is a block diagram showing a filter switching mechanism according to the first embodiment of the present invention. 6a is a filter a, 6b is a filter b, 6c is a filter c, 10 is incident light, 11 is outgoing light, and 12 is rotating. The shaft 13 is a disk, and 9 is the same as described in FIG.
For example, holes are formed in the circular shape of the disk 13 so that light can pass at a predetermined interval, and filters 6a, 6b, and 6c are inserted into the holes. The disk 13 rotates around the rotation shaft 12.

The outgoing light 11 that has passed through the second filter 6 with the incident light 10 from the reflective optical system 5 forms an image on the image sensor 7.
In the switching mechanism 9 of the second filter 6, the second filter 6 has filters 6a to 6c.
For example, the filter 6a has a band of 3 to 5 μm, the filter 6b has a band of 6 to 7 μm, and the filter 6c has a band of 8 to 12 μm.

  The switching mechanism 9 rotates the filter 6a, the filter 6b, and the filter 6c by manually rotating the disk 13 around the rotating shaft 12, thereby switching. Thereby, it becomes possible to select between the filter 6a, the filter 6b, and the filter 6c set at a place where the incident light 10 is incident.

In the daytime when light from sunlight is scattered, the filter 6a in the 3 μm to 5 μm band is selected, and the captured image can be easily seen, and the filter 6 c in the 8 μm to 12 μm band is selected at night when the thermal image is easily visible. This makes it easier to image people.
Here, in order to identify a fellow friend from a plurality of people, by manually switching the switching mechanism 9 and selecting the filter 6b in the 6 μm to 7 μm band, the fellow friend emitting in the 6 μm to 7 μm band that emits light from the fellow friend is selected. Detection is possible reliably.

The image sensor 7 includes a thermal infrared detection element configured in a two-dimensional array, and generates an infrared image.

Thermal infrared detectors detect infrared rays as electromagnetic energy and convert energy changes into temperature changes. For example, bolometer elements, which have a resistance value that changes with temperature, are examples of thermal infrared detectors. The change in the amount of infrared rays is detected as a change in resistance value. Another thermal infrared detecting element is a diode element, which detects a temperature change as a change in the forward voltage of the diode.

The image sensor 7 composed of these thermal infrared detection elements has sensitivity regardless of the wavelength of infrared rays.
By making the wavelength bands of the first filter 4 and the second filter 6 substantially the same, the image sensor 7 can visualize the optical signal 8 emitted by the buddies, and on the screen to be generated as shown in FIG. When there are a plurality of targets, it is possible to simultaneously identify the plurality of targets if the target generating the optical signal 8 is a fellow friend.

The infrared image sensor of the night vision camera mainly uses a wavelength band of 3 μm to 5 μm and a wavelength band of 8 μm to 12 μm, which have good atmospheric transmittance.
These wavelength bands are considered as wavelength bands suitable for target detection, and there is a possibility that the enemy may detect that the wavelength of the optical signal 8 is within these wavelength bands. By making the wavelength band 6 μm to 7 μm that is not used by the night vision camera, there is an effect that is not perceived by the enemy.

On the other hand, if the second filter 6 has at least three wavelength bands of 3 μm to 5 μm, 8 μm to 12 μm, and 6 μm to 7 μm, it is suitable for target detection by switching the wavelength band by the switching mechanism 9. 3 μm to 5 μm and 8 μm to 12 μm, and 6 μm to 7 μm, which are suitable for identifying fellow friends, are effective.

It is a conceptual diagram which shows the operation condition of this invention. It is a block diagram which shows the example of Embodiment 1 of this invention. It is a block diagram which shows the switching mechanism of the filter of Embodiment 1 of this invention. It is an example of the production | generation image of the sighting side apparatus of Embodiment 1 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Aiming side apparatus, 2 Aimed side apparatus, 3 Optical signal generator, 4 1st filter, 5 Reflection type optical system, 6 2nd filter, 7 Image sensor, 8 Optical signal, 9 Switching mechanism, 10 Incident light , 11 outgoing light, 12 rotation axis, 13 disc.

Claims (3)

In the fellow friend recognition device that detects the optical signal of a specific wavelength generated by the sighted side device carried by the other person by the sighting side device carried by one person,
A reflective optical system that receives and reflects an optical signal from the outside;
A filter capable of receiving an optical signal reflected from the reflective optical system and switching a plurality of types of wavelength bands corresponding to the optical signal;
An aiming side device composed of an image sensor composed of a thermal infrared detection element;
A sighting side device capable of generating an optical signal in any one of a plurality of types of wavelength bands used as the filter;
Comrade friend identification device characterized by comprising. 2. The fellow friend identification device according to claim 1, wherein the filter in the aiming side device includes at least three wavelength bands of 3 μm to 5 μm, 6 μm to 7 μm, and 8 μm to 12 μm. 3. The fellow friend identification device according to claim 2, wherein the sighted side device generates light having a wavelength included in a wavelength band of 6 μm to 7 μm.

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