JP2016220042A - Viewing device, viewing system and inspection method of construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a viewing device capable of viewing an unmanned aerial vehicle even if the sunlight enters the eyes, and thereby adverse effect on the health of the eyes can be prevented.SOLUTION: A viewing device 1 includes an eyeglass type viewing device body 1A used for viewing an unmanned aerial vehicle, a light control filter 40 provided in the viewing device body 1A and capable of changing the transmission of external light incident on the view of a user wearing the viewing device body 1A, and a viewing device control unit provided in the viewing device body 1A and controlling the transmission of external light of the light control filter 40, so that the unmanned aerial vehicle can be viewed from the field of vision.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a visual recognition device, a visual recognition system, and a building inspection method.

  Conventionally, when inspecting a building such as a building, a bridge, or a highway, the inspection is performed visually. However, since this inspection work involves danger, in recent years, unmanned air vehicles have been used for this inspection work.

  Further, with the use of the unmanned aerial vehicle, a spectacle-type visual recognition device has been proposed in order to visually recognize the unmanned aerial vehicle (see, for example, Patent Document 1).

  However, when the unmanned flying object is visually recognized by the visual recognition device, if the sunlight enters the eyes, the field of view becomes dazzling and the unmanned flying object cannot be visually recognized. It may also affect eye health.

  The present invention has been made in view of such a conventional problem, and even when sunlight enters the eyes, the unmanned aerial vehicle can be visually recognized, and the influence on the health of the eyes can be prevented. An object is to provide a visual recognition device.

  As a result of intensive studies, the present inventors have adopted the following visual recognition device in order to solve the above problems.

  The visual recognition device of the present invention includes a spectacle-type visual recognition device main body used for visualizing an unmanned air vehicle, and external light incident on a visual field of a user who is provided in the visual recognition device main body and is equipped with the visual recognition device main body. A dimming filter capable of changing the transmittance, and a viewing device control unit that is provided in the viewing device main body and controls the transmittance of the outside light of the dimming filter so that the unmanned air vehicle can be viewed from the field of view. It is characterized by providing.

  According to the visual recognition device of the present invention, an unmanned aerial vehicle can be visually recognized even when sunlight enters the eyes, and it is possible to prevent the eye health from being affected.

It is a figure explaining the inspection method of the bridge concerning the 1st embodiment of the present invention. It is a perspective view which illustrates the appearance of a visual recognition device. It is a left view which illustrates a mode that a user wore a visual recognition device. It is a top view which illustrates a mode that a user put on a visual recognition device. It is a schematic diagram which illustrates partially the structure of a visual recognition apparatus. It is sectional drawing which illustrates the structure of a light control filter. It is a figure explaining the relationship between external light quantity, transmitted light quantity, and image light quantity. It is a figure explaining the adjustment of the transmittance | permeability of a light control filter, and the image | video brightness | luminance of a video display part. It is a figure which illustrates the change of the transmittance | permeability of a light control filter. It is a figure explaining the measurement of visibility. It is a figure which illustrates the relationship between the image | video brightness | luminance and visibility when external light quantity is A1. It is a figure which illustrates the relationship between image brightness | luminance and visibility when the amount of external light is A2 (A2 <A1). It is a figure which illustrates the relationship between video brightness and visibility when the amount of external light is A3 (A3> A1). It is an example of the adjustment table previously memorize | stored in the visual recognition apparatus control part. It is a block diagram of the visual recognition system concerning a 1st embodiment and a 2nd embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram for explaining a method for inspecting a bridge 600 according to the first embodiment of the present invention. In the present embodiment, the visual recognition system 200 (see FIG. 15) is used for inspection of the bridge 600. In the visual recognition system 200, an unmanned air vehicle 201, a controller 202 (remote operation device), and the visual recognition device 1 are used. First, each configuration of the unmanned air vehicle 201, the controller 202, and the visual recognition device 1 will be described.

  The unmanned air vehicle 201 is an air vehicle on which a human is not on board. As this unmanned air vehicle 201, a well-known small-sized one is used. The unmanned aerial vehicle 201 includes an airframe 211, a driving unit 212 provided on the front, rear, left, and right of the airframe 211, and a propeller 213 provided on the driving unit 212. The unmanned air vehicle 201 is configured to fly when the propeller 213 is driven by the drive unit 212.

  Inside the airframe 211, a gyro unit for detecting the attitude of the airframe 211 and various sensors (an orientation sensor, an altitude sensor, a speed sensor, a battery remaining amount sensor, etc.) are provided. The aircraft 211 is provided with a GPS device that detects the position of the aircraft 211. Further, a camera 215 is provided on the lower surface of the body 211. The camera 215 captures a landscape and acquires a video.

  The controller 202 controls (remotely controls) the unmanned air vehicle 201 using radio. A known controller 202 is used. The controller 202 includes an operation lever for maneuvering the unmanned air vehicle 201, an operation unit for operating the camera 215, and the like.

  The visual recognition device 1 is used for a user 100 (operator) of the unmanned air vehicle 201 to visually recognize the unmanned air vehicle 201 and to visually recognize an image captured by the camera 215. The visual recognition device 1 is formed in a glasses shape. The user 100 wears and uses the visual recognition device 1 in the manner of wearing glasses. Below, the specific structure of the visual recognition apparatus 1 is demonstrated.

  FIG. 2 is a perspective view illustrating the appearance of the visual recognition device 1. FIG. 3 is a left side view illustrating the user 100 wearing the visual recognition device 1. FIG. 4 is a plan view illustrating the user 100 wearing the visual recognition device 1. FIG. 5 is a diagram partially illustrating the configuration of the visual recognition device 1.

  2 to 5, the visual recognition device 1 mainly includes a video display unit 10, an optical unit 20, a light guide plate 30, a light control filter 40, a half mirror 50, and an illuminance detection unit 60. And a visual recognition device control unit 70. The visual recognition device 1 is a head-mounted display device that can be mounted on the user's 100 head. The visual recognition device 1 can have a shape similar to glasses, for example.

  The visual recognition device 1 includes a visual recognition device main body 1A configured by a front 1a and a temple 1b that are provided substantially symmetrically on the left and right. The front 1a can be configured by, for example, a transmissive light guide plate 30, and the video display unit 10, the optical unit 20, the visual device control unit 70, and the like can be incorporated in the temple 1b, for example. In FIG. 5, the configuration for the left eye is illustrated, but the visual recognition device 1 has the same configuration for the right eye.

  The visual recognition device 1 allows light (external real image) incident from the outside through the dimming filter 40 to pass through the half mirror 50 to be visually recognized by the user 100 of the visual recognition device 1 and superimposed on the video display unit. This is a device that allows the user 100 to visually recognize the video from 10. Hereinafter, each component of the visual recognition device 1 will be described.

  The video display unit 10 is, for example, a liquid crystal display element, generates light including red light, green light, and blue light from a light source, diffuses the light from the light source, and emits the light toward the optical unit 20. When the video display unit 10 is a liquid crystal display element, for example, a backlight 80 is disposed on the back side of the video display unit 10 (the side opposite to the optical unit 20 side). By controlling the intensity of light emitted from the backlight 80 by the visual recognition device control unit 70, the luminance of the video displayed on the video display unit 10 can be adjusted.

  The video to be displayed on the video display unit 10 can be supplied from the outside of the visual recognition device 1 by wire or wireless, for example. Alternatively, a storage unit (such as a memory card) that can be attached to and detached from the visual recognition device 1 may be provided and an image may be supplied via the storage unit.

  The optical unit 20 is a part that guides the light emitted from the video display unit 10 to the light guide plate 30, and includes, for example, a lens 21 and a mirror 22. The optical unit 20 may be configured to have a plurality of lenses, or may be configured to use a prism or the like.

  The light guide plate 30 is a part that guides the light emitted from the optical unit 20 to the half mirror 50 while reflecting the light from the inner wall surface. The light guide plate 30 is formed of a resin having transparency with respect to the wavelength of light emitted from the optical unit 20. The half mirror 50 is a part that reflects the light from the light guide plate 30 to the back side of the visual recognition device 1 and emits the light toward the eye of the user 100 of the visual recognition device 1 (left eye 100L in FIG. 4). The optical unit 20, the light guide plate 30, and the half mirror 50 are typical examples of optical means that guides the video displayed by the video display unit 10 to the eyes of the user 100.

  The display device 1B according to the present invention includes a video display unit 10, an optical unit 20, a light guide plate 30, a half mirror 50, and a backlight 80.

  The light control filter 40 is a part that electrically changes the transmittance of light (external light) incident on the visual recognition device 1 from the outside and adjusts the intensity of external light reaching the user's 100 eye. For example, the light control filter 40 is provided on the front surface of the light guide plate 30 (on the side opposite to the eyes of the user 100) so as to cover the field of view (field of view) of the user 100. The light control filter 40 can be comprised using an electrochromic element, for example. The electrochromic element can be formed, for example, on a glass substrate or a plastic substrate that is transparent to visible light.

  Here, an example of the structure of the light control filter 40 will be described with reference to FIG. The light control filter 40 can have a cell structure in which a titanium oxide particle film 42 and a display layer 43 are formed on a display substrate 41, and a counter substrate 45 is bonded through a spacer 44 of about 10 μm. In the cell structure, for example, 1-ethyl-3-methylimidazolium tetracyanoborate is enclosed as an electrolytic solution.

  As the display substrate 41, for example, a film substrate with an ITO conductive film of about 150 mm × 80 mm can be used. The titanium oxide particle film 42 can be formed, for example, by applying a titanium oxide nanoparticle dispersion on the display substrate 41 by a spin coating method or the like, and performing an annealing process at a temperature of about 120 ° C. for about 15 minutes.

  The display layer 43 is formed by, for example, spin coating using a 1 wt% 2,2,3,3-tetrafluoropropanol solution of a compound represented by the following structural formula (Formula 1) on the titanium oxide particle film 42 as a coating solution. Apply. Then, by performing an annealing treatment at a temperature of about 120 ° C. for about 10 minutes, the electrochromic compound can be adsorbed and formed on the surface of the titanium oxide particles constituting the titanium oxide particle film 42.

  The dimming filter 40 is configured to be able to variably control the transmittance at an arbitrary position and size in the dimming filter 40 by the visual recognition device control unit 70. This function can be realized, for example, by using a thin film transistor array having a high transmittance as the counter substrate 45. For example, the viewing area (viewing area) of the user 100 is divided into a plurality of pixels, and a thin film transistor array including a thin film transistor corresponding to each pixel is used as the counter substrate 45. Then, by individually controlling the power supply to the display layer 43 of the light control filter 40 by each thin film transistor, the transmittance of the display layer 43 can be variably controlled at an arbitrary position and size.

  Alternatively, if the specification may be rough control, for example, the counter substrate 45 may be divided into several regions (segments) corresponding to the visual field region of the user 100, and individual wiring may be provided for each segment. . By controlling the power supply to the individual wiring, the transmittance of the display layer 43 can be variably controlled for each segment. This method is preferable in that an expensive component such as a thin film transistor array does not have to be used as the counter substrate 45.

Returning to the description of FIGS. 2 to 5, the illuminance detection unit 60 detects the illuminance of ambient light (brightness around the visual recognition device 1). As the illuminance detection unit 60, for example, a photodiode or the like can be used. The illuminance detection unit 60 can be mounted on the front 1a, for example.

  The visual recognition device control unit 70 is a part that adjusts the transmittance of the dimming filter 40 and the luminance of the video display unit 10 based on the illuminance of external light obtained by the illuminance detection unit 60. The visual recognition device control unit 70 may have various other functions. The visual device controller 70 can be configured to include, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a main memory, and the like.

  In this case, various functions of the visual device control unit 70 can be realized by reading a program recorded in the ROM or the like into the main memory and executing it by the CPU. The CPU of the visual device control unit 70 can read and store data from the RAM as necessary. However, part or all of the visual device control unit 70 may be realized only by hardware. Further, the visual device control unit 70 may be physically configured by a plurality of devices.

  The power supply 90 is a part that supplies power to the video display unit 10, the light control filter 40, the visual device control unit 70, and the like. As the power supply 90, for example, a button battery or the like can be used. In addition, the visual recognition apparatus 1 is obtained by using the same power supply 90 as a power source for driving the video display unit 10 (including a power source for driving the backlight 80) and a power source for driving the dimming filter 40. Can be reduced in weight. However, the power supply 90 may be supplied from the outside of the visual recognition device 1 without being incorporated in the visual recognition device 1.

  FIG. 7 shows the relationship between the external light quantity A, the transmitted light quantity B dimmed by the dimming filter 40, and the video light quantity C sent from the video display unit 10. As the image light amount C is larger than the transmitted light amount B, the displayed image becomes easier to see. However, if the transmitted light amount B is too small, it is difficult to see the surrounding real image.

  Therefore, in the visual recognition device 1, as shown in FIG. 8, the illuminance detection unit 60 monitors the amount of external light A and inputs the monitoring result to the visual recognition device control unit 70. The visual device control unit 70 is based on the monitor result of the illuminance detection unit 60 and the adjustment table recorded in advance in the RAM or the like of the visual device control unit 70, and the transmittance of the dimming filter 40 and the video display unit 10. Automatically adjust the image brightness at the same time. The transmitted light amount B is adjusted by adjusting the transmittance of the dimming filter 40, and the image light amount C is adjusted by adjusting the image brightness.

  The transmittance of the light control filter 40 can be adjusted by the time during which the constant voltage is applied to the light control filter 40 from the visual device controller 70. That is, the transmittance of the dimming filter 40 is changed by changing the coloring degree of the display layer 43 by controlling the amount of charge (time integration of current) of the display layer 43 of the dimming filter 40 according to the time for applying the constant voltage. Can be adjusted.

  FIG. 9 is a diagram illustrating a change in the transmittance of the dimming filter 40. In FIG. 9, the display layer 43 of the light control filter 40 is colored by applying a constant voltage of 2V. FIG. 9 shows that, for example, if the transmittance of the light control filter 40 is to be 30%, a constant voltage of 2 V may be applied for 1.5 seconds. It can also be seen that if the transmittance of the light control filter 40 is to be 10%, a constant voltage of 2 V may be applied for 5 seconds.

  However, the transmittance of the dimming filter 40 may change with time. Therefore, a transmittance detecting means for detecting the transmittance of the dimming filter 40 is provided, and the visual device controller 70 automatically sets the transmittance of the dimming filter 40 to a desired value based on the detection result of the transmittance detecting means. It is preferable to correct. Thereby, an image can be displayed without changing the visibility of the visual recognition device 1 even with the same ambient brightness for a long time. The detection by the transmittance detecting means and the automatic correction by the visual device control unit 70 can be performed at regular time intervals, for example. As the transmittance detecting means, for example, a photodiode or the like can be used.

  On the other hand, the image brightness (image light amount C) of the image display unit 10 can be adjusted by controlling the intensity of light emitted from the backlight 80 by the visual device control unit 70. For example, consider a case where an LED (Light Emitting Diode) is used as the backlight 80 and PWM (Pulse Width Modulation) light control is performed. In this case, the video brightness can be adjusted by changing the pulse width (duty ratio) for turning on / off the LED according to a command from the visual recognition device controller 70.

  Next, an example of adjusting the transmittance of the light control filter 40 and the video brightness of the video display unit 10 will be described.

  First, the visibility with respect to the image brightness | luminance in each external light light quantity (dimmed light quantity) was measured. Specifically, as shown in FIG. 10, a fiber probe 503 of the spectrophotometer 502 is disposed at the eye position, imitating the LED white ring illumination 501 as external light. The spectrum of the RGB image was measured with the spectrophotometer 502 while changing the brightness with the LED white ring illumination 501 and changing the brightness of the video display.

  Further, in order to reduce the light, the color density of the electrochromic element of the light control filter 40 was electrically controlled by the visual device control unit 70 to change the transmittance, and the spectrum of the RGB image was measured in the same manner. Then, based on the tristimulus values XYZ from each spectrum, the xy chromaticity was calculated, and the RGB area was calculated as the image contrast from the RGB xy coordinates. The larger the area, the higher the visibility. Separately from this, sensory evaluation was performed in advance to determine which value the RGB area has as good or poor visibility.

  FIG. 11 is a diagram illustrating the relationship between video luminance and visibility when the amount of external light is A1. In FIG. 11, the curve (1) shows the case where the light control filter 40 is in a decolored state. The curve (2) shows the case where the light control filter 40 is in a colored state and the transmittance is 10%. Moreover, the straight line of (3) has shown the case where the visibility derived from the examination result demonstrated with reference to FIG. 10 is favorable.

  From FIG. 11, for example, when the image brightness is C11, the visibility is good when the dimming filter 40 is decolored and the amount of external light A1 is hardly reduced. Further, when the image luminance is C12 smaller than C11, visibility is improved by setting the transmittance of the light control filter 40 to 10%.

  In other words, by adjusting the transmittance of the dimming filter 40, it is possible to reduce the image luminance (image light amount C) from C11 to C12 while maintaining good visibility. Therefore, when the illuminance detection unit 60 detects the amount of external light A1, the transmittance of the dimming filter 40 may be adjusted to 10% and the video luminance (video light amount C) may be adjusted to C12. Thereby, even if image brightness (image light quantity C) is reduced, good visibility can be maintained. That is, power consumption can be reduced without impairing the visibility of the user.

  FIG. 12 is a diagram illustrating the relationship between the video brightness and the visibility when the amount of external light is A2 (A2 <A1). In FIG. 12, the curve (1) shows a case where the light control filter 40 is in a decolored state. The curve (2) shows the case where the light control filter 40 is in a colored state and the transmittance is 50%. Moreover, the straight line of (3) has shown the case where the visibility derived from the examination result demonstrated with reference to FIG. 10 is favorable.

  From FIG. 12, for example, when the image brightness is C21, the visibility is good when the dimming filter 40 is in a decolored state and the amount of external light A2 is hardly reduced. Further, when the image brightness is C22 smaller than C21, visibility is improved by setting the transmittance of the light control filter 40 to 50%.

  Thus, when the amount of external light is relatively small, if the transmittance of the light control filter 40 is reduced too much, it becomes difficult to see the surrounding real image. Therefore, when the illuminance detection unit 60 detects a relatively small amount of external light A2, it is only necessary to adjust so that the transmittance of the light control filter 40 is 50% and the image luminance (image light amount C) is C22. Thereby, even if image brightness (image light quantity C) is reduced, good visibility can be maintained. That is, power consumption can be reduced without impairing the visibility of the user.

  FIG. 13 is a diagram illustrating the relationship between the video brightness and the visibility when the amount of external light is A3 (A3> A1). In FIG. 13, the curve (1) shows the case where the light control filter 40 is in a decolored state. The curve (2) shows the case where the light control filter 40 is in a colored state and the transmittance is 10%. Moreover, the straight line of (3) has shown the case where the visibility derived from the examination result demonstrated with reference to FIG. 10 is favorable.

  As described above, when the amount of external light is relatively large, the visibility is inferior if the external light is not dimmed even in the case of C3, which is the maximum image luminance, but is visible when the transmittance is 10%. The level is good. However, in this case, the video luminance remains C3 and the visibility is improved, but there is no effect of reducing power consumption. However, in the examples of FIGS. 11 and 12, the effect of reducing the power consumption is clear, and the visual recognition device 1 is still a device that can reduce the power consumption without impairing the visibility of the user.

  FIG. 14 is an example of an adjustment table stored in advance in the visual recognition device control unit 70. The illuminance detection unit 60 detects the amount of external light A. Based on the detection result, the visual recognition device control unit 70 maintains the visibility by adjusting the transmittance (transmitted light amount B) and the video luminance (video light amount C) of the dimming filter 40 using the adjustment table of FIG. It is possible to reduce the video brightness.

  In the example of FIG. 14, when the external light illuminance is in the first range (external light quantity A is less than 1000 lx), the video luminance of the video display unit 10 is constant and the external light illuminance is high. As it goes, the transmittance of the light control filter 40 is lowered stepwise. When the external light illuminance is in the second range (external light quantity A is 1000 lx or more), the transmittance of the light control filter 40 is kept constant (for example, the transmittance is fixed to the minimum value). The luminance of the video display unit 10 is increased stepwise as the illuminance of outside light increases.

  However, the present invention is not limited to this, and a third range is provided between the first range and the second range. In the third range, the transmittance of the light control filter 40 increases as the illuminance of outside light increases. It is also possible to control so that the brightness of the video display unit 10 is increased stepwise.

  Note that there is an individual difference in the relationship between the transmittance of the light control filter that feels good visibility and the video luminance. Accordingly, it is more preferable that a plurality of adjustment tables are stored and the wearer can arbitrarily switch using a switch or the like. Thereby, even if the surrounding brightness changes, it is possible to always display an image with minimum power consumption while maintaining the visibility of each wearer.

  FIG. 15 is a block diagram of the visual recognition system 200. The structure of the visual recognition system 200 is demonstrated using FIG. The visual recognition system 200 includes a camera 215, a communication device 203, a visual recognition device control unit 70, an illuminance detection unit 60, a display device 1B, and a dimming filter 40.

  The camera 215 is configured to capture a landscape and acquire an image, convert the image into an electric signal (video signal), and output the electric signal.

  The communication device 203 transmits the video acquired by the camera 215 to the visual device control unit 70 by communication (wireless communication). The communication device 203 includes an unmanned air vehicle control unit 216, an unmanned air vehicle transmission unit 217, a controller reception unit 221, a controller control unit 222, a controller transmission unit 223, and a visual recognition device reception unit 1C. .

  The unmanned air vehicle controller 216 and the unmanned air vehicle transmitter 217 are provided in the unmanned air vehicle 201.

  The unmanned air vehicle control unit 216 has a camera 215 connected to the input side and an unmanned air vehicle transmission unit 217 connected to the output side. The unmanned air vehicle control unit 216 is configured to convert the video signal output from the camera 215 for communication and output it to the unmanned air vehicle transmission unit 217.

  The unmanned air vehicle transmission unit 217 has a controller reception unit 221 connected to the output side by wireless communication. The unmanned air vehicle transmitter 217 is configured to transmit the communication video signal output from the unmanned air vehicle controller 216 to the controller receiver 221 by wireless communication.

  The controller receiver 221, the controller controller 222, and the controller transmitter 223 are provided in the controller 202.

  The controller receiver 221 is connected to the controller controller 222 on the output side. The controller reception unit 221 is configured to receive a communication video signal transmitted from the unmanned air vehicle transmission unit 217 and output the communication video signal to the controller control unit 222.

  The controller transmission unit 223 is connected to the output side of the controller control unit 222. The controller control unit 222 is configured to output the communication video signal output from the controller reception unit 221 to the controller transmission unit 223.

  The controller transmission unit 223 is connected to the visual recognition device reception unit 1C by wireless communication on the output side. The controller transmission unit 223 is configured to transmit the video signal for communication output from the controller control unit 222 to the visual recognition device reception unit 1C by wireless communication.

  The visual recognition device receiving unit 1C is provided in the visual recognition device main body 1A (see FIG. 2). The visual recognition device receiving unit 1C is connected to the visual recognition device control unit 70 on the output side. The visual recognition device reception unit 1 </ b> C is configured to receive the communication video signal transmitted from the controller transmission unit 223 and output the video signal to the visual recognition device control unit 70.

  The visual device controller 70 is connected to the visual device receiver 1C and the illuminance detector 60 on the input side, and to the video display unit 10 (see FIG. 5) and the dimming filter 40 of the display device 1B on the output side. . The visual device control unit 70 is configured to return the communication video signal output from the visual device reception unit 1 </ b> C to the original state and output it to the video display unit 10. The display device 1 </ b> B is configured to convert the video signal output from the visual recognition device control unit 70 to the video display unit 10 into a video and display it in the field of view of the user 100.

  Moreover, the visual recognition device control unit 70 is configured to control the transmittance of the external light and the luminance of the video of the dimming filter 40 so that the unmanned air vehicle 201 and the video can be visually recognized from the field of view of the user 100.

  Specifically, the visual recognition device control unit 70 outputs a transmittance control signal for controlling the transmittance of the external light of the dimming filter 40 to the dimming filter 40 based on the illuminance of the external light detected by the illuminance detection unit 60. Is configured to do. In the dimming filter 40, the transmittance of external light is appropriately adjusted by the transmittance control signal output from the visual recognition device controller 70.

  The visual recognition device control unit 70 is configured to output a luminance control signal for controlling the luminance of the video to the display device 1B based on the illuminance of external light detected by the illuminance detection unit 60. The display device 1 </ b> B is configured to control the luminance of the video based on the luminance control signal output from the visual recognition device control unit 70.

  Next, a method for inspecting the bridge 600 using the visual recognition system 200 will be described.

  As shown in FIG. 1, the user 100 wears the visual recognition device 1 on the head. Next, the user 100 has the controller 202 and steers the unmanned aerial vehicle 201 to move it near the inspection point of the bridge 600.

  The camera 215 captures a landscape to acquire a video, converts the video into a video signal, and outputs the video signal to the unmanned air vehicle control unit 216.

  The unmanned air vehicle control unit 216 converts the video signal output from the camera 215 for communication and outputs it to the unmanned air vehicle transmission unit 217. The unmanned air vehicle transmitter 217 transmits the communication video signal output from the unmanned air vehicle controller 216 to the controller receiver 221 by wireless communication.

  The controller receiver 221 receives the communication video signal transmitted from the unmanned air vehicle transmitter 217 and outputs it to the controller controller 222. The controller control unit 222 outputs the communication video signal output from the controller reception unit 221 to the controller transmission unit 223. The controller transmission unit 223 transmits the communication video signal output from the controller control unit 222 to the visual recognition device reception unit 1C through wireless communication.

  The visual recognition device reception unit 1 </ b> C receives the communication video signal transmitted from the controller transmission unit 223, and outputs it to the visual recognition device control unit 70.

  The visual device controller 70 returns the communication video signal output from the visual device receiver 1C to the original state and outputs it to the video display unit 10 of the display device 1B. The display device 1 </ b> B converts the video signal output from the visual device control unit 70 to the video display unit 10 into a video and displays it in the field of view of the user 100.

  At this time, when the unmanned air vehicle 201 and the sun 700 are in the same direction as viewed from the user 100, the illuminance of external light detected by the illuminance detection unit 60 becomes high. Accordingly, the visual recognition device control unit 70 outputs a transmittance control signal based on the illuminance of the external light to the dimming filter 40 and outputs a luminance control signal to the video display unit 10 of the display device 1B.

  When the unmanned air vehicle 201 and the sun 700 are not in the same direction as viewed from the user 100, the illuminance of external light detected by the illuminance detection unit 60 is higher than that when the unmanned air vehicle 201 and the sun 700 are in the same direction. Also lower. Therefore, the visual recognition device control unit 70 outputs a transmittance control signal whose transmittance is increased based on the illuminance of the external light to the dimming filter 40 and outputs a luminance control signal to the video display unit 10 of the display device 1B. .

  In the dimming filter 40, the transmittance of external light is appropriately adjusted by the transmittance control signal output from the visual recognition device controller 70. The display device 1 </ b> B controls the luminance of the video by the luminance control signal output from the visual recognition device control unit 70 to the video display unit 10.

  In this way, the user 100 can visually recognize the unmanned air vehicle 201 and the video. In addition, the user 100 moves the unmanned air vehicle 201 to the inspection location precisely while visually checking the image, and inspects the inspection location.

  Next, effects of the inspection method for the visual recognition device 1, the visual recognition system 200, and the bridge 600 according to the present embodiment will be listed and described.

  The visual recognition device 1 of the present embodiment is adjusted so that the visual recognition device main body 1A, the dimming filter 40 that can change the transmittance of external light incident on the field of view of the user 100, and the unmanned air vehicle 201 are visible from the visual field. A visual device controller 70 that controls the transmittance of outside light of the optical filter 40 is provided.

  Thereby, even if the user 100 visually recognizes the unmanned air vehicle 201, even if sunlight enters the eyes, the dimming filter 40 appropriately adjusts the transmittance of external light so that the unmanned air vehicle 201 can be visually recognized from the field of view. So you don't feel dazzling. Therefore, the visual recognition device 1 of the present embodiment can visually recognize the unmanned flying object even when sunlight enters the eyes, and can prevent the eye health from being affected. Further, the user 100 can accurately check the position (height) of the unmanned air vehicle 201, the flight path, and the like by using the visual recognition device 1 of the present embodiment.

  The visual recognition device 1 according to the present embodiment includes an illuminance detection unit 60 that is provided in the visual recognition device main body 1A and detects the illuminance of external light, and the visual recognition device control unit 70 is the illuminance of external light detected by the illuminance detection unit 60. Based on the above, the transmittance of the external light of the light control filter 40 is controlled.

  Thereby, the visual recognition device control unit 70 can improve the accuracy of control of the transmittance of the external light of the light control filter 40. Accordingly, the dimming filter 40 can more appropriately adjust the transmittance of external light. Therefore, the visual recognition device 1 of the present embodiment can increase the visibility of the unmanned air vehicle 201 and can confirm the position of the unmanned air vehicle 201 with higher accuracy.

  Moreover, in the visual recognition apparatus 1 of this Embodiment, the light control filter 40 was formed using the electrochromic element. Thereby, even if ambient brightness (light quantity of external light) changes, the light control filter 40 responds instantaneously and it becomes possible to adjust the transmittance | permeability of external light appropriately. Therefore, the visual recognition device 1 according to the present embodiment can prevent a decrease in visibility even when the ambient brightness changes.

  The visual recognition system 200 according to the present embodiment includes the visual recognition device 1, the camera 215, and the communication device 203. Furthermore, the visual recognition device control unit 70 controls the transmittance of the external light and the luminance of the image of the light control filter 40 so that the unmanned air vehicle 201 and the image can be visually recognized from the field of view of the user 100.

  As a result, the user 100 can visually recognize the video imaged by the camera 215 with high contrast. Therefore, the visual recognition system 200 of this Embodiment can raise the visibility of the unmanned air vehicle 201 and an image | video.

  Moreover, the visual recognition system 200 of this Embodiment does not need to raise the brightness | luminance of an image more than necessary because the light control filter 40 adjusts the transmittance | permeability of external light. Therefore, it is possible to reduce eye fatigue and power consumption of the entire visual recognition system 200.

  Moreover, since the visual recognition system 200 of the present embodiment includes the illuminance detection unit 60, the dimming filter 40 can more appropriately adjust the transmittance of external light. Visibility can be further increased.

  In the inspection method of the bridge 600 according to the present embodiment, the bridge 600 is inspected using the visual recognition system 200, so that the visibility of the unmanned air vehicle 201 and the image is improved during the inspection. Therefore, the inspection method for the bridge 600 according to the present embodiment can efficiently inspect the bridge 600.

(Second Embodiment)
FIG. 15 shows a block diagram of a visual recognition system 200A according to the second embodiment of the present invention. In this embodiment, the same parts as those described in the first embodiment are denoted by the same reference numerals, and different parts are mainly described.

  In the visual recognition system 200A of the present embodiment, a visual field information collection unit 60A is used instead of the illuminance detection unit 60 of the visual recognition system 200 of the first embodiment. The visibility information collection unit 60A is provided, for example, on the front 1a of the visual recognition device main body 1A. This visual field information collection unit 60A collects visual field information of the user 100 wearing the visual recognition device main body 1A.

  As the visibility information collection unit 60A, for example, a small CMOS (Complementary Metal Oxide Semiconductor) camera used for a notebook computer, a smartphone, or the like can be used. A CCD (Charge Coupled Device) camera or the like may be used as the visibility information collection unit 60A.

  The visual recognition device control unit 70 is configured to identify a portion where an image exists in the visual field based on the visual field information collected by the visual field information collecting unit 60A. Further, the visual recognition device control unit 70 is configured to control the transmittance of the external light of the dimming filter 40 so that a portion corresponding to the portion where the specified video exists in the dimming filter 40 becomes dark.

  As a result, the visual field contrast becomes high, and the user 100 can visually recognize the image with the high visual field contrast. Therefore, the visual recognition system 200A of the present embodiment can improve the visibility of the video. Further, when it is desired to visually recognize the unmanned air vehicle 201 and the image, such as when the distance between the unmanned air vehicle 201 and the user 100 is relatively short, the visibility of the unmanned air vehicle 201 and the image can be improved.

  Further, the visual recognition device control unit 70 is configured to identify a portion where the sun 700 (see FIG. 1) exists based on the visual field information collected by the visual field information collection unit 60A. Furthermore, the visual recognition device control unit 70 is configured to control the transmittance of the external light of the dimming filter 40 so that a portion corresponding to the portion where the sun 700 specified by the dimming filter 40 is present becomes dark.

  Thereby, the user 100 does not feel dazzling even when sunlight enters the eyes when viewing the unmanned air vehicle 201. Therefore, the visual recognition system 200A of the present embodiment can visually recognize the unmanned flying object even when sunlight enters the eyes, and can prevent the eye health from being affected. The other effects are as described in the first embodiment.

  As mentioned above, although embodiment which concerns on this invention was illustrated, this embodiment does not limit the content of this invention. Various modifications can be made without departing from the scope of the claims of the present invention.

  For example, in the present embodiment, the example in which the visual recognition device 1 is incorporated into the visual recognition system 200 has been described. However, for example, the visual recognition device 1 may be used alone for the purpose of simply visualizing the unmanned air vehicle 201. The visual recognition device 1 in this case may not include the display device 1B. Thereby, the weight reduction of the visual recognition apparatus 1 can be achieved.

  In addition, when using the visual field information collection unit 60A in the visual recognition device 1 in this case, the visual recognition device control unit 70 identifies a portion where the sun 700 exists based on the visual field information collected by the visual field information collection unit 60A. To do. Furthermore, the visual recognition device control unit 70 controls the transmittance of the external light of the dimming filter 40 so that a portion corresponding to the portion where the sun 700 specified by the dimming filter 40 is present becomes dark.

  In this embodiment, a part of the communication device 203 is provided in the controller 202, but it is not necessarily provided in the controller 202. For example, a part of the communication device 203 may be provided in another device, or the constituent devices of the communication device 203 may be provided in the unmanned air vehicle 201 and the visual recognition device 1 without providing the other device.

  In the present embodiment, the visual recognition device control unit 70 automatically controls the transmittance of external light and the luminance of the image of the light control filter 40 using the illuminance detection unit 60 and the visual field information collection unit 60A. There is no need to control automatically. For example, instead of using the illuminance detection unit 60 and the visual information collection unit 60A, the visual recognition device control unit 70 may be configured to manually control the transmittance of the external light and the luminance of the image of the light control filter 40.

  Further, in the present embodiment, the example in which the visual recognition device control unit 70 controls the transmittance of the external light and the video luminance of the dimming filter 40 using the illuminance detection unit 60 or the visual field information collection unit 60A has been described. In addition, the visual recognition device control unit 70 may control the transmittance of external light and the luminance of the image of the light control filter 40 using both the illuminance detection unit 60 and the visual field information collection unit 60A.

  In the second embodiment, an example in which a CMOS camera, a CCD camera, or the like is used as the visual field information collection unit 60A has been described. Therefore, the visual recognition device 1 may be provided with a detection unit that detects the brightness of an image captured by the CMOS camera or the CCD camera. Accordingly, the visual recognition device control unit 70 may control the external light transmittance and the video luminance of the light control filter 40 based on the brightness detected by the detection unit. Note that the brightness of an image captured by a CMOS camera or a CCD camera is, for example, the brightness of an image sensor.

DESCRIPTION OF SYMBOLS 1 Visualization apparatus 1A Visualization apparatus main body 1B Display apparatus 40 Light control filter 60 Illuminance detection part 60A Visibility information collection part 70 Visualization apparatus control part 100 User 200,200A Visualization system 201 Unmanned air vehicle 203 Communication apparatus 215 Camera 600 Bridge (building) )
700 sun

JP 2014-92696 A

Claims (7)

Glasses-type visual recognition device body used for visualizing an unmanned air vehicle,
A dimming filter that is provided in the visual recognition device main body and is capable of varying the transmittance of external light incident on the field of view of a user wearing the visual recognition device main body;
A visual recognition device comprising: a visual recognition device control unit that is provided in the visual recognition device main body and controls the transmittance of the external light of the light control filter so that the unmanned flying object can be visually recognized from the field of view. The visual recognition device according to claim 1,
An illuminance detection unit that is provided in the visual recognition device body and detects the illuminance of the external light,
The visual recognition device control unit controls the transmittance of the external light of the dimming filter based on the illuminance of the external light detected by the illuminance detection unit. In the visual recognition device according to claim 1 or 2,
The visual adjustment device, wherein the light control filter is formed using an electrochromic element. The visual recognition device according to any one of claims 1 to 3,
A camera that is provided in the unmanned air vehicle and captures an image of a landscape;
A communication device that communicates the video to the visual device control unit;
A display device that is provided in the visual recognition device main body and displays the image transmitted from the camera by the communication device in the field of view via the visual recognition device control unit;
The visual recognition device control unit controls a transmittance of the external light and a luminance of the video of the dimming filter so that the unmanned air vehicle and the video are visible from the field of view. The visual recognition system according to claim 4,
Provided with a visual field information collection unit that is provided in the visual recognition device body and collects information on the visual field;
The visual recognition device control unit identifies a portion where the video exists in the visual field based on the visual field information collected by the visual field information collection unit, and corresponds to a portion where the identified video exists in the dimming filter A visual recognition device, wherein the external light transmittance of the light control filter is controlled so that a portion to be darkened. The visual recognition system according to claim 5,
The control unit identifies a portion where the sun exists in the field of view based on the information of the field of view collected by the field of vision information collection unit, and a portion corresponding to a portion where the identified sun exists in the dimming filter A visual recognition device that controls the transmittance of the external light of the light control filter so as to be dark.   A building inspection method using the visual recognition system according to any one of claims 4 to 6, wherein the building is inspected.