WO2016192435A1 - 3d image apparatus, and optical radiation protection apparatus and method therefor - Google Patents

Abstract

Disclosed are a 3D image apparatus (10), and an optical radiation protection apparatus (12) and a method therefor. The optical radiation protection apparatus (12) comprises a transmitter (121), a receiver (122) and a control circuit (123), wherein the transmitter (121) is used to emit a first detecting optical signal (T1) to a scene space; the receiver (122) is used to receive a second incident detecting optical signal (T2) from the scene space; and the control circuit (123) is used to judge whether the second detecting optical signal (T2) is the first detecting optical signal (T1) reflected back by an object in the scene space, and if so, a control signal is output, thereby controlling the shut-down of the corresponding light source (11) or adjusting same so that the light source emits radiation light which conforms to a human health standard to the scene space. By means of the above-mentioned method, a human body can be automatically protected from being injured.

Description

3D image device, optical radiation protection device and method thereof

[Technical Field]

The invention relates to the technical field of optical radiation protection, in particular to a 3D image device, a protection device for optical radiation and a method thereof.

 【Background technique】

At present, electronic products capable of emitting radiant light are spread over various fields, and such electronic devices bring great convenience to people's work and life, such as emitting a radiant light for illumination, and emitting a video light for imaging. A laser light or the like for photographing is emitted.

However, if the power of the light is large or the energy density of the light is large, if the human body is close to the light source of the light, it will cause harm to the human body. For example, a laser is a light that has a high energy density and is not easily noticeable. Lasers can burn biological tissues, especially for retinal burns. If the human body is exposed to the laser for a long time without any protective measures, it will have a great impact on health, such as burning the skin and damaging vision.

The existing protection measures for lasers are safety education. It is strictly forbidden to watch the laser beam with naked eyes, pay attention to the operating procedures; determine the operation area and danger zone and have a warning sign. Unrelated personnel are not allowed to enter at will. Wear appropriate protective glasses and protection. Gloves, check your body regularly, especially your eyes. However, all of the above methods rely on the user's awareness of the danger of lasers and self-discipline to effectively reduce the risk of laser damage to the eyes, and these measures are usually only implemented in the laboratory, but the products using lasers are It can be seen everywhere, so it is difficult to prevent it from harming the human body.

Further, in the prior art, there are few protection measures similar to laser light sources for general high-power light sources, which is more likely to endanger the health of the human body.

 [Summary of the Invention]

The technical problem to be solved by the present invention is to provide a protection device and method for optical radiation and a 3D image device, which can automatically prevent the human body from being damaged by radiation light exceeding the human health standard.

In order to solve the above technical problem, a technical solution adopted by the present invention is to provide a protection device for optical radiation, the device comprising: a transmitter for transmitting a first detection optical signal to a scene space; and a receiver for receiving a secondary scene a second detecting light signal incident on the space; the control circuit is configured to determine whether the second detecting light signal is the first detecting light signal reflected by the object in the scene space, and if yes, outputting the control signal, thereby controlling the corresponding light source to be turned off Or emit radiation that meets human health standards into the scene space.

The control circuit includes: a signal generating unit, configured to generate a carrier signal and a first encoded signal, and synthesize the carrier signal and the first encoded signal into a driving signal; the device further includes: an amplifier, configured to amplify the driving signal, and Output to the transmitter to generate a first detected optical signal.

The receiver includes: a conversion unit configured to convert the second detection light signal incident on the scene space into an electrical signal; and an amplification/reduction unit configured to amplify the electrical signal and restore the second encoded signal according to the carrier signal.

The control circuit further includes: a first determining unit, configured to determine whether the second encoded signal is identical to the first encoded signal; and a second determining unit, configured to determine, when the first determining unit determines that the result is yes, The detecting the optical signal is the first detecting optical signal reflected by the object in the scene space, and further determining whether the light intensity of the second detecting signal is equal to or greater than a preset threshold; the control unit is configured to be determined by the second determining unit When the result is YES, the control signal is outputted to control the corresponding light source to be turned off or adjusted to emit the radiation light conforming to the human health standard into the scene space, when the result of the first judgment unit or the second judgment unit is no. , does not output any signal.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a 3D image device, which includes: a light source for transmitting a high-energy light signal into a scene space; and a camera for acquiring a scene a light signal of a space, and performing cross-correlation processing to form a 3D image; and an apparatus for optical radiation protection, comprising: a transmitter for transmitting a first detected light signal to the scene space; and a receiver for receiving the scene space a second detection light signal that is incident; a control circuit configured to determine whether the second detection light signal is a first detection light signal reflected by an object in the scene space, and if so, output a control signal, thereby controlling the corresponding light source to be turned off or Adjusted to emit radiant light that meets human health standards into the scene space.

The control circuit includes: a signal generating unit, configured to generate a carrier signal and a first encoded signal, and synthesize the carrier signal and the first encoded signal into a driving signal; the device further includes: an amplifier, configured to amplify the driving signal, and Output to the transmitter to generate a first detected optical signal.

The receiver includes: a conversion unit configured to convert the second detection light signal incident on the scene space into an electrical signal; and an amplification/reduction unit configured to amplify the electrical signal and restore the second encoded signal according to the carrier signal.

The control circuit further includes: a first determining unit, configured to determine whether the second encoded signal is identical to the first encoded signal; and a second determining unit, configured to determine, when the first determining unit determines that the result is yes, The detecting the optical signal is the first detecting optical signal reflected by the object in the scene space, and further determining whether the light intensity of the second detecting signal is equal to or greater than a preset threshold; the control unit is configured to be determined by the second determining unit When the result is YES, the control signal is output to control the corresponding light source to be turned off or adjusted to emit the radiation light conforming to the human health standard into the scene space. When the result of the first judgment unit or the second judgment unit is no, the Output any signal.

Wherein, the light source is a laser infrared light source, the emitter is an infrared diode, and the receiver is an infrared receiving tube.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a method for protecting optical radiation, the method comprising: transmitting a first detection optical signal to a scene space; and receiving a second detection optical signal incident from a scene space. Determining whether the second detection light signal is the first detection light signal reflected by the object in the scene space, and if so, outputting the control signal, thereby controlling the corresponding light source to be turned off or adjusted to emit the radiation light conforming to human health standards to In the scene space.

Wherein, the method further comprises: generating a carrier signal and the first encoded signal, and synthesizing the carrier signal and the first encoded signal into a driving signal; and amplifying the driving signal to form a first detected optical signal.

The step of receiving the second detection light signal incident from the scene space comprises: converting the second detection light signal incident on the scene space into an electrical signal; performing amplification processing on the electrical signal and restoring the second encoded signal according to the carrier signal.

Wherein, determining whether the second detection optical signal is the first detection optical signal reflected by the object in the scene space, and if yes, the step of outputting the control signal comprises: determining whether the second encoded signal is the same as the first encoded signal; When the result of the unit determination is YES, it is determined that the second detection light signal is the first detection light signal reflected by the object in the scene space, and further determining whether the light intensity of the second detection signal is equal to or greater than a preset threshold. If the result of the determination is yes, the control signal is output to control the corresponding light source to be turned off or adjusted to emit the radiation light conforming to the human health standard into the scene space, and if the result of the determination is no, no signal is output; When the result of the judgment is no, no signal is output.

The beneficial effects of the present invention are: different from the prior art, the present invention transmits a first detection light signal to a scene space by a transmitter, the receiver receives a second detection light signal incident from a scene space, and the control circuit determines the second detection. Whether the optical signal is the first detected optical signal reflected by the object in the scene space, and if so, outputs a control signal, thereby controlling the corresponding light source to be turned off or adjusted to emit radiation light conforming to human health standards into the scene space . Therefore, it can automatically prevent the harm of the radiation that does not meet the human health standards to the human body.

 [Description of the Drawings]

1 is a schematic structural diagram of a 3D image device according to an embodiment of the present invention;

2 is a signal waveform diagram of an embodiment of the present invention;

3 is another signal waveform diagram provided by an embodiment of the present invention;

4 is a schematic structural diagram of another 3D image device according to an embodiment of the present invention;

FIG. 5 is a flowchart of a method for protecting optical radiation according to an embodiment of the present invention.

【detailed description】

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a 3D image device according to an embodiment of the present invention. As shown in FIG. 1, the 3D image device 10 of the present invention includes a light source 11 and a protection device 12 for optical radiation.

The light source 11 is configured to emit a radiation light signal into the scene space. Specifically, the light source 11 is a predetermined diffusion angle to radiate light into the scene space. In this embodiment, the light source 11 may be any kind of light source capable of emitting a radiation light signal, such as a laser infrared light source, a projection lamp of a projector, a photographing lamp for photographing, a composite lamp shared by a hospital for illumination and disinfection, and the like.

The optical radiation protection device 12 includes a transmitter 121, a receiver 122, and a control circuit 123. The transmitter 121 is configured to transmit the first detection optical signal T1 to the scene space. The receiver 122 is configured to receive a second detection light signal T2 incident from the scene space. The control circuit 123 is configured to determine whether the second detected optical signal T2 is the first detected optical signal T1 reflected by the object in the scene space. If so, the control signal C is output, thereby controlling the corresponding light source to be turned off or adjusted to emit radiation light that meets human health standards into the scene space.

Among them, emitting radiation that meets human health standards includes emitting low-energy density radiation, emitting low-power radiation, and the like. Among them, the values of energy density and power can be set according to the actual use environment.

In this embodiment, the control circuit specifically controls whether the corresponding light source 11 is turned off or adjusted to emit a radiation light that meets human health standards according to the characteristics of the radiation light emitted by the light source 11. The details will be detailed later.

Therefore, in this embodiment, when there is an object in front of the light source 11, the light 11 can be automatically turned off 11 or the light source 11 can be controlled to emit radiation that meets human health standards. If the object in front of the light source 11 is a human, it can be protected. The human body prevents harm.

Please refer to FIG. 2 together. FIG. 2 is a waveform diagram of signals provided by an embodiment of the present invention. The control circuit 123 further includes a signal generating unit 1231. The optical radiation protection device 12 includes an amplifier 124. The signal generating unit 1231 generates the carrier signal A and the first encoded signal B1, and synthesizes the carrier signal A and the first encoded signal B1 into the driving signal t. The amplifier 124 is for amplifying the drive signal t and outputting it to the transmitter 121 to generate a first detected light signal T1.

The receiver 122 includes a receiving unit 1223, a converting unit 1221, and an amplifying/reducing unit 1222. The receiving unit 1223 is configured to receive the second detection optical signal T2 incident on the scene space. The converting unit 1221 is configured to convert the second detection light signal T2 incident on the scene space into an electrical signal. The amplifying/reducing unit 1222 is configured to perform an amplification process on the electrical signal and restore the second encoded signal B2 according to the carrier signal A, as shown in FIG.

The band of the signal received by the receiving unit 1223 is determined according to the signal generated by the signal generating unit 1231. Specifically, the wavelength band of the signal received by the receiving unit 1223 includes the wavelength of the signal generated by the signal generating unit 1231. And the sensitivity of the signal received by the receiving unit 1223 is set according to the type of light emitted by the light source 11. For example, if the light source 11 emits laser light, the sensitivity of the receiving signal received by the receiving unit 1223 is set higher, if the light source 11 emits the foregoing text. The light for projection, the light for photographing, and the like are set such that the sensitivity of the signal received by the receiving unit 1223 is set low.

Further, the control circuit 123 further includes determination units 1232 and 1234 and a control unit 1233. The determining unit 1232 is configured to determine whether the second encoded signal B2 is the same as the first encoded signal B1. The determining unit 1234 is configured to determine, when the result of the determination by the determining unit 1232 is YES, that the second detecting light signal T2 is the first detecting light signal T1 reflected by the object in the scene space, and further determining the second detecting signal T2. Whether the light intensity is equal to or greater than a preset threshold. The control unit 1233 is configured to output a control signal C when the result of the determination by the determining unit 1234 is YES to control the corresponding light source 11 to be turned off or adjusted to emit radiation light conforming to human health standards into the scene space. When the result of the judgment by the judgment unit 1232 or the judgment unit 1234 is NO, no signal is output. Specifically, when the result of the determination by the determination unit 1232 is NO, it is determined that the second detection light signal T2 is not the first detection light signal T1 reflected by the object in the scene space, and no signal is output. When the result of the determination by the determining unit 1234 is NO, it is determined that the second detecting light signal T2 is the first detecting light signal T1 reflected by the object in the scene space, but the light intensity of the second detecting light signal T2 is less than the preset Threshold, then no signal is output at this time.

In this embodiment, the control signal C output by the control unit 1233 is divided into a shutdown control signal or an adjustment control signal, which is specifically determined by the characteristics of the light source 11. The following three situations are included:

In the first case, the light source 11 is a laser infrared light source. Because the laser can cause damage to the skin and glasses of the human body. The main process of damage to the skin is mild erythema, burning until tissue charring necrosis, in addition to damage pigment cells, causing capillary congestion, sometimes visible blood vessel damage and bleeding. Skin damage is usually reversible and reversible.

The process of injury to the eye is that the laser beam is focused on the retina by the refractive system of the eye itself into a very small spot, which causes a high concentration of light energy and causes burns. Laser radiation in the infrared or microwave region can be absorbed by the iris or crystal to cause thermal damage, resulting in iritis and cataracts. When the eyes are exposed to laser light, there is a sudden glare, blurred vision or fixed black shadow in front of the eyes, and even loss of vision. Laser radiation damage to the retina is painless and easily overlooked. Long-term exposure to low-dose and diffuse-reflective lasers, the human body generally does not find their own visual impairment, sometimes general neurasthenia, visual fatigue after work, eye pain, etc., no specific symptoms.

Therefore, when the light source 11 is an infrared laser light source, since the energy density of the laser light is large, causing great damage to the human body, the control signal C outputted by the control unit 1233 is a shutdown control signal for turning off the light source 11 to prevent When the human body is close to the laser light source 11, the skin or vision is damaged by such a laser that is not noticeable and has a great damage.

In this embodiment, when the light source 11 is an infrared laser light source, the emitter 121 is preferably an infrared diode, and the receiver 122 is preferably an infrared receiving tube. And the first detection light signal T1 is preferably an infrared flash signal.

In the second case, the light source 11 is a light source that emits a higher power such as a projection lamp of a projector or a photographing lamp for photographing. Since the energy of the radiation light emitted by the high-power light source 11 is also high, when the human body is close to the light source 11, the high-energy radiation light also causes great harm to the human body, especially to the human eye. Then, the control signal C output by the control unit 1233 is an adjustment control signal, specifically, reducing the transmission power of the light source 11 to reduce the energy value of the radiation light, thereby preventing the human body from causing harm when the human body is close to the light source 11.

Further, when the light source 11 is a light source such as a projector lamp or a photographing light, the device 12 of the embodiment further includes a distance sensor 125 for measuring the distance between the object and the light source 11 and This distance value is sent to the control unit 1233. When the determining unit 1232 determines that the second detection light signal T2 received by the receiver 122 is the first detection light signal T1 reflected by the object in the scene space, the control unit 1233 combines the distance detected by the distance sensor 125 to further control. Specifically, if the control unit 1233 receives the distance value transmitted by the distance sensor 125 is smaller and smaller, indicating that the object moves toward the light source 11, the control unit 1233 outputs a control signal to gradually reduce the transmission power of the light source 11 to gradually reduce the radiation. The energy value of the light, when the distance value transmitted by the distance sensor 125 is less than or equal to the preset distance value, the control unit 1233 outputs a control signal to turn off the light source 11. Thereby, it is possible to prevent the human body from being exposed to the strong light of the light source 11 when it is getting closer to the light source 11, which is harmful to health.

In the third case, the light source 11 is a composite lamp capable of emitting ultraviolet light and illumination light. Such a light source 11 is typically placed in a location that requires both illumination and disinfection, such as in a hospital. When the light source 11 emits ultraviolet light to sterilize the scene space, when the human body approaches the light source 11, that is, when the second detection light signal T2 is detected as the first detection light signal T1 reflected in the object space, the ultraviolet radiation Light can cause great harm to the human body, especially to the eyes of the human body. Then, the control signal C output by the control unit 1233 is a shutdown signal or an adjustment control signal. Specifically, the emission of the ultraviolet light is turned off, or the radiation light signal for emitting the illumination is adjusted to prevent the human body from being in close proximity to the light source 11 to cause harm to the human body.

Please refer to FIG. 4. FIG. 4 is another schematic structural diagram of a 3D image device according to an embodiment of the present invention. As shown in FIG. 4, the 3D image device 30 provided by the embodiment of the present invention includes a light source 31, a camera 32, and a protection device 33 for optical radiation.

The light source 31 is used to emit a radiation light signal into the scene space. The light source 31 is the same as the light source 11 described above, and will not be described again.

The camera 32 is configured to acquire an optical signal of the scene space and perform cross-correlation processing to form a 3D image. Among them, the camera 32 includes a color information camera 321 and an infrared camera 322.

The optical radiation protection device 33 includes a receiver 331, a transmitter 332, and a control circuit (not shown). Among them, the positions of the receiver 331 and the transmitter 332 can be interchanged. The optical radiation protection device 33 of the present embodiment is as described above for the optical radiation protection device 12, and details are not described herein.

Further, the 3D image device 30 further includes a housing 34, a sound receiving hole 35, and a bracket 36. The sound receiving hole 35 is disposed on the housing 34, and the housing 34 is further used to protect components such as the light source 31, the camera 32, and the optical radiation protection device 33. The receiver 331 and the transmitter 332 receive and transmit corresponding signals through corresponding through holes in the housing 34. The bracket 36 is for supporting the housing 34.

The present invention also provides a method of protecting optical radiation, which is applied to the protection device for optical radiation as described above. See Figure 5 for details.

As shown in FIG. 5, the method of the embodiment of the present invention includes the following steps:

Step S1: transmitting the first detection light signal to the scene space.

Before this step, the carrier signal and the first encoded signal are first generated, and the carrier signal and the first encoded signal are synthesized into a driving signal, and then the driving signal is amplified to form a first detected optical signal.

The specific process diagram is as described above and will not be described here.

Step S2: receiving a second detection light signal incident from the scene space.

The step is specifically: converting the second detection optical signal incident on the scene space into an electrical signal, and then performing the amplification processing on the electrical signal and restoring the second encoded signal according to the carrier signal.

The specific process is as described above and will not be described here.

Step S3: determining whether the second detection light signal is the first detection light signal reflected by the object in the scene space.

This step specifically determines whether the second encoded signal is identical to the first encoded signal. If the determined structure is YES, the process goes to step S4, and if the result of the determination is NO, the process goes to step S5.

Step S4: When the result of the determination by the determining unit is YES, determining that the second detecting light signal is the first detecting light signal reflected by the object in the scene space, outputting the control signal, thereby controlling the corresponding light source to be turned off or adjusted to Radiation light that meets human health standards is emitted into the scene space.

Further, in the step, when it is determined that the second detection light signal is the first detection light signal reflected by the object in the scene space, further determining whether the light intensity of the second detection signal is equal to or greater than a preset threshold, If the result of the determination is yes, the control signal is outputted to control the corresponding light source to turn off or emit the radiation light conforming to the human health standard into the scene space, and if the result of the determination is no, no signal is output.

The specific judgment and control process is as described above, and will not be described here.

Step S5: When the result of the judgment is No, no signal is output.

Therefore, the embodiment of the invention can automatically prevent the harm of the radiation light that does not meet the human health standard to the human body.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformation of the present invention and the contents of the drawings may be directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims (13)

1. A protection device for optical radiation, characterized in that the protection device comprises:

   a transmitter for transmitting a first detection light signal to the scene space;

   a receiver, configured to receive a second detection light signal incident from the scene space;

   a control circuit, configured to determine whether the second detection light signal is the first detection light signal reflected by an object in the scene space, and if yes, output a control signal, thereby controlling the corresponding light source to be turned off or adjusted to Radiation light that meets human health standards is emitted into the scene space.
2. The protection device of claim 1 wherein said control circuit comprises:

   a signal generating unit, configured to generate a carrier signal and a first encoded signal, and synthesize the carrier signal and the first encoded signal into a driving signal;

   The device also includes:

   An amplifier for amplifying the drive signal and outputting to the transmitter to generate the first detected light signal.
3.  The protection device according to claim 2, wherein the receiver comprises:

   a conversion unit, configured to convert a second detection light signal incident on the scene space into an electrical signal;

   And an amplification/reduction unit for performing amplification processing on the electrical signal and restoring the second encoded signal according to the carrier signal.
4. The protection device of claim 3, wherein the control circuit further comprises:

   a first determining unit, configured to determine whether the second encoded signal is the same as the first encoded signal;

   a second determining unit, configured to determine, when the result of the determining by the first determining unit is YES, that the second detecting light signal is the first detecting light signal reflected by an object in the scene space, Further determining whether the light intensity of the second detection signal is equal to or greater than a preset threshold;

   a control unit, configured to: when the result of the second determination unit determines yes, output a control signal to control the corresponding light source to be turned off or adjusted to emit radiation light conforming to human health standards into the scene space, When the result judged by the first determining unit or the second determining unit is NO, no signal is output.
5. A 3D image device, characterized in that the 3D image device comprises:

   a light source for emitting a radiation light signal into the scene space;

   a camera for acquiring an optical signal of the scene space and performing cross-correlation processing to form a 3D image;

   A protection device for optical radiation, comprising:

   a transmitter for transmitting a first detection light signal to the scene space;

   a receiver, configured to receive a second detection light signal incident from the scene space;

   a control circuit, configured to determine whether the second detection light signal is the first detection light signal reflected by an object in the scene space, and if yes, output a control signal, thereby controlling the corresponding light source to be turned off or adjusted to Radiation light that meets human health standards is emitted into the scene space.
6. The 3D image device according to claim 5, wherein the control circuit comprises:

   a signal generating unit, configured to generate a carrier signal and a first encoded signal, and synthesize the carrier signal and the first encoded signal into a driving signal;

   The device also includes:

   An amplifier for amplifying the drive signal and outputting to the transmitter to generate the first detected light signal.
7. The 3D image device according to claim 6, wherein the receiver comprises:

   a conversion unit, configured to convert a second detection light signal incident on the scene space into an electrical signal;

   And an amplification/reduction unit for performing amplification processing on the electrical signal and restoring the second encoded signal according to the carrier signal.
8. The 3D image device according to claim 7, wherein the control circuit further comprises:

   a first determining unit, configured to determine whether the second encoded signal is the same as the first encoded signal;

   a second determining unit, configured to determine, when the result of the determining by the first determining unit is YES, that the second detecting light signal is the first detecting light signal reflected by an object in the scene space, Further determining whether the light intensity of the second detection signal is equal to or greater than a preset threshold;

   a control unit, configured to: when the result of the second determination unit determines yes, output a control signal to control the corresponding light source to be turned off or adjusted to emit radiation light conforming to human health standards into the scene space, When the result judged by the first determining unit or the second determining unit is NO, no signal is output.
9. The 3D image device according to claim 5, wherein the light source is a laser infrared light source, the emitter is an infrared diode, and the receiver is an infrared receiving tube.
10.  A method of protecting optical radiation, characterized in that the method comprises:

    Transmitting a first detection light signal to the scene space;

    Receiving a second detection light signal incident from the scene space;

    Determining whether the second detection light signal is the first detection light signal reflected by the object in the scene space, and if so, outputting a control signal, thereby controlling the corresponding light source to be turned off or adjusted to emit human health Standard radiant light into the scene space.
11. The method of claim 10, wherein the method further comprises:

    Generating a carrier signal and a first encoded signal, and synthesizing the carrier signal and the first encoded signal into a driving signal;

    The drive signal is amplified to form the first detected light signal.
12. The method of claim 11 wherein said step of receiving a second detected optical signal incident from said scene space comprises:

    Converting a second detection light signal incident on the scene space into an electrical signal;

    And amplifying the electrical signal and restoring the second encoded signal according to the carrier signal.
13. The method according to claim 12, wherein the determining whether the second detection light signal is the first detection light signal reflected by an object in the scene space, and if so, outputting a control signal The steps include:

    Determining whether the second encoded signal is the same as the first encoded signal;

    When the result of the determination is YES, it is determined that the second detection light signal is the first detection light signal reflected by the object in the scene space, and further determining whether the light intensity of the second detection signal is If the result of the determination is yes, the control signal is output to control the corresponding light source to be turned off or adjusted to emit the radiation light conforming to the human health standard into the scene space, if the result of the determination is No, no signal is output;

    When the result of the judgment is no, no signal is output.