KR20230111923A - Wireless tranceiving apparatus for realigning optical axis by detecting external vibration - Google Patents

Abstract

A wireless transmitting/receiving system according to the present disclosure includes at least one of a wireless transmitting/receiving device that transmits/receives data using light, receives light related to data to be transmitted from a conversion unit to generate parallel light, and a wireless receiving device that receives the parallel light and transmits the parallel light to an inverse transform unit. It includes a sensor unit for measuring the azimuth angle of the new device, and a control unit that maintains the azimuth angle of the wireless transmission/reception device constant by controlling the left and right driving unit or the up and down driving unit based on the signal of the sensor unit.

Description

Wireless transmission and reception device for realigning optical axis by detecting external vibration

Embodiments of the present invention relate to a wireless transceiver for rearranging an optical axis by sensing external vibration. More specifically, the wireless transceiver according to the present disclosure uses a sensor for detecting vibration in order to realign an optical axis faster than conventional technologies.

There are various types of wireless communication that we easily encounter in real life. However, since wireless communication using an existing electrical signal transmission method uses radio waves with a frequency of 3 kHz to 3 THz, the data transmission rate per second is limited.

However, optical communication, which transmits light through optical fibers, enables high-capacity and high-speed data communication in a short time by using light with a wide bandwidth in a frequency domain larger than conventional wireless communication.

Common components for optical communication are a light source corresponding to an optical transmitter, an optical modulator, an optical fiber as an optical transmission medium, an optical multiplexer, an optical amplifier, and an optical receiver. The characteristics of optical communication are low loss, broadband, miniaturization, non-conductivity, and abundance of material resources.

In particular, conventional radio communication requires a large antenna for transmission and reception, requiring high installation costs and maintenance costs due to bad weather, whereas optical communication is economical because it does not require a large antenna. Therefore, optical communication is developing day by day.

On the other hand, since optical communication has a disadvantage in that the amount of data transmission decreases due to optical loss, optical dispersion, and nonlinear optical effects if the wireless transceiver is not accurately aligned, accurate alignment of the transmitter and receiver is required above all to increase the transmission and reception efficiency of optical communication.

Republic of Korea Patent Publication No. 10-2010-0026773 Republic of Korea Patent Publication No. 10-2012-0053582 Republic of Korea Patent Publication No. 10-2016-0145957

A wireless transmitting/receiving system according to an embodiment of the present disclosure includes at least one of a wireless transmitting/receiving device that transmits/receives data using light, receives light related to data to be transmitted from a conversion unit to generate parallel light, and a wireless receiving device that receives the parallel light and transmits the parallel light to an inverse transform unit. It includes a sensor unit for measuring the azimuth angle of the wireless transceiver unit, and a control unit that maintains the azimuth angle of the wireless transceiver unit constant by controlling the left and right driving unit or up and down driving unit based on the signal of the sensor unit.

The controller of the wireless transmission/reception system according to an embodiment of the present disclosure determines an initial position of the wireless transmission/reception device so that parallel light of the wireless transmission device is directed to at least one receiving lens of the wireless reception device, determines the initial position, measures a first azimuth at the initial position based on the sensor unit, measures a second azimuth at a predetermined cycle based on the sensor unit, determines a first difference between the first azimuth and the second azimuth, and determines an absolute value of the first difference When it is equal to or greater than the threshold difference value, a first control signal for at least one of the left and right driving units or up and down driving units is generated based on the first difference value, and at least one of the left and right driving units or up and down driving units is controlled based on the first control signal so that the wireless transmission/reception device faces the first azimuth again.

The control unit of the wireless transmission/reception system according to an embodiment of the present disclosure controls at least one of the left/right driving unit or the up/down driving unit based on the first control signal so that the wireless transmission/reception apparatus faces the first azimuth again, measures a third azimuth based on the sensor unit, determines a second difference value between the first azimuth and the third azimuth, and when the absolute value of the second difference value is equal to or greater than a predetermined threshold difference value, an alarm signal indicating that there is an abnormality in the azimuth angle. print out

The control unit of the wireless transmission/reception system according to an embodiment of the present disclosure controls at least one of the left/right driving unit or the up/down driving unit based on the first control signal so that the wireless transmission/reception apparatus faces the first azimuth again, determines whether the wireless reception apparatus receives the test collimated light from the wireless transmission apparatus, and if the wireless transmission apparatus does not receive the test parallel light from the wireless transmission apparatus, determines the initial position of the wireless transmission/reception apparatus again, and determines the absolute value of the second difference value in advance. If it is equal to or greater than the determined threshold difference value, the initial position of the wireless transceiver is determined again.

After controlling at least one of the left and right driving unit or the up and down driving unit based on the first control signal so that the wireless transmitting/receiving device of the wireless transmitting/receiving system faces the first azimuth again, when the optical screen included in the wireless receiving device receives test collimated light from the wireless transmitting device, the initial position of the wireless transmitting/receiving device is determined again.

A wireless transmission device of a wireless transmission/reception system according to an embodiment of the present disclosure includes at least one transmission lens for receiving a laser light signal related to transmission data from a conversion unit and converting the laser light signal into parallel light, wherein the wireless reception device receives parallel light from the wireless transmission device and transmits a pulsed optical signal based on the parallel light to an inverse conversion unit, and is used to align the wireless transmission device and the wireless reception device, and includes a plurality of light receiving elements on a surface facing the wireless transmission device. A screen includes a screen, a conversion unit encodes transmission data to generate an electrical signal, and includes a laser diode for converting the generated electrical signal into a laser optical signal, and an inverse conversion unit includes a photodiode for converting a pulsed optical signal received from at least one receiving lens into an electrical signal, and restores the electrical signal converted by the photodiode into data.

In order to determine the initial position of the wireless transmission/reception system according to an embodiment of the present disclosure, the control unit controls the wireless transmission device to irradiate test parallel light to the wireless reception device, obtains location information on the optical screen where the test parallel light arrives, obtains a difference position vector between the location information and the position of at least one predetermined receiving lens, generates a second control signal for at least one of left and right driving units or up and down driving units based on the difference position vector, and transmits the test parallel light to the at least one receiving lens. At least one of the left and right driving unit or the up and down driving unit is controlled based on the second control signal to be irradiated to the position of .

When a predetermined time elapses after measuring the first azimuth of the wireless transmission/reception system according to an embodiment of the present disclosure, the initial position of the wireless transmission/reception device is determined again, and when the first difference value is equal to or greater than a threshold difference value, the initial position of the wireless transmission/reception device is determined again.

In addition, a program for implementing the method of operating the wireless transmission/reception system as described above may be recorded in a computer-readable recording medium.

In order to transmit and receive large amounts of data, it is possible to wirelessly transmit and receive large-sized data such as high-resolution images and network data without having to connect wires. In addition, there is an effect that the optical axes of the wireless transmitter and the wireless receiver can be automatically aligned, and can be automatically and quickly restored even if the optical axes are distorted by an external force.

1 is a diagram showing a wireless transmission device according to an embodiment of the present disclosure.
2 shows a cross-section of an optical cable connection terminal according to an embodiment of the present disclosure.
3 shows a meniscus lens according to an embodiment of the present disclosure.
4 shows a convex lens according to an embodiment of the present disclosure.
5 is a diagram illustrating a wireless receiving device according to an embodiment of the present disclosure.
6 is a diagram illustrating a control unit included in a wireless transmission/reception apparatus according to an embodiment of the present disclosure.
7 is a block diagram illustrating a wireless transmission/reception system according to an embodiment of the present disclosure.
8 is a perspective view of a wireless transmission/reception system according to an embodiment of the present disclosure.
9 is a diagram for explaining a left and right driving unit and an up and down driving unit according to an embodiment of the present disclosure.
10 is a flowchart for explaining the operation of a wireless transmission/reception system according to an embodiment of the present disclosure.
11 is a diagram for explaining the operation of a wireless transmission/reception system according to an embodiment of the present disclosure.
12 is a flowchart for explaining a step of determining an initial position of a wireless transceiver according to an embodiment of the present disclosure.
13 is a diagram for explaining a step of determining an initial position of a wireless transceiver according to an embodiment of the present disclosure.

Advantages and features of the disclosed embodiments, and methods of achieving them, will become apparent with reference to the following embodiments in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below and may be implemented in various different forms, and only the present embodiments make the present disclosure complete and have ordinary knowledge in the art to which the present disclosure belongs. It is only provided to fully inform the scope of the invention.

Terms used in this specification will be briefly described, and the disclosed embodiments will be described in detail.

The terms used in this specification have been selected from general terms that are currently widely used as much as possible while considering the functions in the present disclosure, but they may vary according to the intention of a person skilled in the related field, a precedent, or the emergence of new technology. In addition, in a specific case, there is also a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the invention. Therefore, terms used in the present disclosure should be defined based on the meaning of the term and the general content of the present disclosure, not simply the name of the term.

Expressions in the singular number in this specification include plural expressions unless the context clearly dictates that they are singular. Also, plural expressions include singular expressions unless the context clearly specifies that they are plural.

When it is said that a certain part "includes" a certain component throughout the specification, it means that it may further include other components without excluding other components unless otherwise stated.

Also, the term “unit” used in the specification means a software or hardware component, and “unit” performs certain roles. However, "unit" is not meant to be limited to software or hardware. A “unit” may be configured to reside in an addressable storage medium and may be configured to reproduce on one or more processors. Thus, as an example, “unit” includes components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. Functionality provided within components and "parts" may be combined into fewer components and "parts" or further separated into additional components and "parts".

According to an embodiment of the present disclosure, “unit” may be implemented as a processor and a memory. The term “processor” should be interpreted broadly to include general-purpose processors, central processing units (CPUs), microprocessors, digital signal processors (DSPs), controllers, microcontrollers, state machines, and the like. In some circumstances, “processor” may refer to an application specific integrated circuit (ASIC), programmable logic device (PLD), field programmable gate array (FPGA), or the like. The term “processor” may refer to a combination of processing devices, such as, for example, a combination of a DSP and a microprocessor, a combination of a plurality of microprocessors, a combination of one or more microprocessors in conjunction with a DSP core, or any other such configuration.

The term "memory" should be interpreted broadly to include any electronic component capable of storing electronic information. The term memory may refer to various types of processor-readable media, such as random access memory (RAM), read-only memory (ROM), non-volatile random access memory (NVRAM), programmable read-only memory (PROM), erasable-programmable read-only memory (EPROM), electrically erasable PROM (EEPROM), flash memory, magnetic or optical data storage, registers, and the like. A memory is said to be in electronic communication with the processor if the processor can read information from and/or write information to the memory. Memory integrated with the processor is in electronic communication with the processor.

Hereinafter, with reference to the accompanying drawings, embodiments will be described in detail so that those skilled in the art can easily carry out the embodiments. And in order to clearly describe the present disclosure in the drawings, parts irrelevant to the description are omitted.

Referring to FIG. 7 before describing FIG. 1, a configuration of a wireless transmission/reception system will be described.

7 is a block diagram illustrating a wireless transmission/reception system according to an embodiment of the present disclosure.

The wireless transmission/reception system 700 of the present disclosure may include the wireless transmission/reception apparatuses 100 and 500, the driving units 710 and 720 of the wireless transmission and reception apparatus, the conversion unit 150 of the wireless transmission apparatus, and the inverse conversion unit 550 of the wireless reception apparatus. The wireless transmission/reception device may include the wireless transmission device 100 and the wireless reception device 500 . The wireless receiving device 500 may receive the parallel optical signal 140 transmitted by the wireless transmitting device 100 .

In the present disclosure, the term wireless transmission/reception apparatus 100 or 500 refers to at least one of the wireless transmission apparatus 100 and the wireless reception apparatus 500. Therefore, the wireless transmission/reception device 100 or 500 should not be construed as including both the wireless transmission device 100 and the wireless reception device 500.

The driving units 710 and 720 of the wireless transmitting/receiving device may be components for moving at least one of the wireless transmitting/receiving device. That is, the wireless transmission/reception system 700 may include at least one of the driving unit 710 of the wireless transmission device and the driving unit 720 of the wireless reception device. The driving units 710 and 720 of the wireless transceiver may be coupled to the wireless transceiver 100 and 500 . The driving units 710 and 720 of the wireless transceiver may include electric motors or gears. The driving units 710 and 720 of the wireless transceiver may rotate the wireless transceiver 100 and 500 up and down or left and right.

Also, the conversion unit 150 of the wireless transmission device may convert an image signal into an optical signal. In addition, the inverse conversion unit 550 of the wireless receiving device may convert the received optical signal into an image signal. Hereinafter, the configuration of the wireless transmission/reception system together with FIGS. 1 to 5 will be described.

1 is a diagram showing a wireless transmission device according to an embodiment of the present disclosure.

The wireless transmission/reception device may be a device for transmitting/receiving large-capacity data using parallel optical signals. The wireless transmission/reception device may include the wireless transmission device 100 and the wireless reception device 500 . The wireless transmission device 100 and the wireless reception device 500 may have the same structure. When located on the transmitting side, it becomes the wireless transmission device 100, and when located on the receiving side, it can become the wireless receiving device 500. The wireless transmitting device 100 may generate and transmit the parallel optical signal 140, and the wireless receiving device 500 may receive the parallel optical signal 140.

The wireless transmission device 100 may receive a pulsed laser light signal from a laser diode (LD), convert large amount of data into a parallel light signal, and transmit the parallel light signal. The wireless transmission device 100 and the wireless reception device 500 may be located on a straight line. The wireless receiving device 500 may receive the parallel optical signal and convert it back into a pulsed optical signal. In addition, a pulsed optical signal may be recognized using a photodiode (PD; photoelectric sensor) connected to the wireless receiving device 500 .

The wireless transmission device 100 may include a first optical cable connection terminal 130 for receiving the pulsed laser light signal from the conversion unit 150 that converts mass data into a pulsed laser light signal. The first optical cable connection terminal 130 may be a transmission optical cable connection terminal. The conversion unit 150 may convert large amount of data into a pulse form. When converting large-capacity data, the conversion unit 150 may compress the large-capacity data using a standard or non-standard method. A pulsed laser light signal may be generated based on the converted pulse using a laser diode (LD). The pulsed laser light signal may be transmitted through the optical cable 160 . A wavelength of the pulsed laser light signal may be one of a near-infrared ray and a mid-infrared ray wavelength band. However, it is not limited thereto, and the wavelength of the optical signal may be a visible light wavelength band. One end of the optical cable 160 may be connected to the first optical cable connection terminal 130, and the other end of the optical cable 160 may be connected to the conversion unit 150.

The first optical cable connection terminal 130 may be connected to the conversion unit 150 by a transmission optical cable 160 . The wireless transmission device 100 may receive a pulsed laser light signal using the first optical cable connection terminal 130 . The first optical cable connection terminal 130 may allow the pulsed laser light signal received from the optical cable 160 to be irradiated into the wireless transmission device 100 . The pulsed laser light signal may be scattered inside the wireless transmission device 100. The wireless transmission device 100 may include a reflector guide for limiting scattering of the pulsed laser light signal.

2 shows a cross-section of an optical cable connection terminal according to an embodiment of the present disclosure.

The first optical cable connection terminal 130 may include a reflector guide 210 . When the optical cable 160 is connected to the first optical cable connection terminal 130, the optical cable 160 may be inserted into the reflector guide 210. The reflector guide 210 may have a cylindrical shape. The reflector guide 210 may surround a portion of the outer circumferential surface of the transmission optical cable 160 . The reflector guide 210 may be configured to limit scattering of the pulsed laser light signal. That is, the reflector guide 210 may be configured to limit the scattering angle 220 of the pulsed laser light signal. The inner circumferential surface of the reflector guide 210 may include a material capable of reflecting a pulsed laser light signal. Therefore, when the pulsed laser light signal irradiated from the end of the optical cable 160 reaches the inner circumferential surface of the reflector guide 210, the reflector guide 210 transmits the pulsed laser light signal to the first meniscus lens 110. The reflector guide 210 may extend from the end 161 of the core of the transmission optical cable 160 toward the first optical cable connection terminal 130 in the traveling direction 230 of the pulsed laser light signal. That is, the reflector guide 210 may extend from the end 161 of the optical cable 160 in the longitudinal direction. Accordingly, the scattering angle 220 of the pulsed laser light signal of the reflector guide 210 may be limited.

A length (e) of the reflector guide 210 extending from the end 161 of the core of the transmission optical cable in the traveling direction of the pulsed laser light signal may be greater than (2 * L1 * r)/d1. Here, L1 may be the first distance. The first distance may be a distance from the first meniscus lens 110 to the optical cable connection terminal. r is the radius of the transmission optical cable 160, and d1 may be the diameter of the first meniscus lens. r can be much smaller than d1. For example, r may be less than 1/10 of d1.

Referring back to FIG. 1 , the wireless transmission device 100 may include a first meniscus lens 110 . The first meniscus lens 110 may be spaced apart from the optical cable connection terminal by a first distance L1. Also, the first meniscus lens 110 may be configured to collect pulsed laser light signals scattered from the first optical cable connection terminal 130 . The first distance L1 may be greater than or equal to 25 mm and less than or equal to 45 mm. The first distance L1 may be, for example, 35 mm. However, it is not limited thereto.

An incident surface of the first meniscus lens 110 may face the first optical cable connection terminal 130 . Also, the exit surface of the first meniscus lens 110 may face the first convex lens 120 . The incident surface may be a surface on which the pulsed laser light signal is incident to the first meniscus lens 110 , and the output surface may be a surface on which the pulsed laser light signal exits the first meniscus lens 110 .

The wireless transmission device 100 may include a first convex lens 120 . Both the incident surface and the exit surface of the first convex lens 120 may be convex. The incident surface may be a surface on which the pulsed laser light signal is incident to the first convex lens 120 , and the output surface may be a surface on which the pulsed laser light signal exits the first convex lens 120 . The first convex lens 120 may be spaced apart from the first meniscus lens 110 by a second distance L2. In addition, the first convex lens 120 may be configured to convert a pulsed laser light signal into a parallel light signal. The diameter of the first convex lens 120 may be greater than or equal to the diameter of the first meniscus lens 110 . An optical axis of the first convex lens 120 may coincide with an optical axis of the first meniscus lens 110 .

A parallel optical signal emitted from the exit surface of the first convex lens 120 may be transmitted to the wireless receiving device 500 .

3 shows a meniscus lens according to an embodiment of the present disclosure.

In the present disclosure, the meniscus lens may include a first meniscus lens 110 and a second meniscus lens 510 . The meniscus lens may be a positive meniscus lens. The meniscus lens may include a first surface 311 and a second surface 312 . When the first surface 311 is an incident surface, the second surface 312 may be an exit surface. Also, when the first surface 311 is an exit surface, the second surface 312 may be an incident surface. In the case of the wireless transmission device 100, the second surface 312 may be an incident surface and the first surface 311 may be an exit surface. Conversely, in the case of the wireless receiving device 500, the first surface 311 may be an incident surface, and the second surface 312 may be an exit surface. Hereinafter, the first meniscus lens 110 will be mainly described. Since a description of the second meniscus lens 510 is the same as that of the first meniscus lens 110, a detailed description thereof will be omitted.

The parallel optical signals may be incident on the first surface 311 of the first meniscus lens 110 and converged at a focal point. That is, when the first surface 311 of the first meniscus lens 110 becomes the incident surface, parallel optical signals may be focused at a focal point. In order to check whether the parallel light signals are concentrated at the focal point by the first meniscus lens 110, it is possible to check whether or not the light incident on the first surface 311 of the first meniscus lens 110 is concentrated by installing a photodiode sensor at a focal point 320 away from the principal point H' of the first meniscus lens 110 by the focal distance f1. Here, the principal point H' may mean a plane on which incident light is refracted. The focal length of the first meniscus lens 110 at the principal point H' may be equal to f1. f1 may be greater than or equal to 20 mm and less than or equal to 40 mm. Also, f1 may be 37 mm. The focal length f1 of the first meniscus lens 110 may be determined based on at least one of the edge thickness, the center thickness, and the position of the principal point H' of the lens.

The diameter d1 of the first meniscus lens 110 may be greater than or equal to 10 mm and less than or equal to 30 mm. More specifically, the diameter d1 of the first meniscus lens 110 may be 21 mm.

The radius of curvature R1vx of the first surface 311 of the first meniscus lens 110 may be greater than or equal to 50 mm and less than or equal to 70 mm. Also, the radius of curvature R1cv of the second surface 312 of the first meniscus lens 110 may be greater than or equal to 50 mm and less than or equal to 70 mm. The radius of curvature R1vx of the first surface 311 may be the same as the radius of curvature R1cv of the second surface 312 . The radius of curvature R1vx of the first surface 311 and the radius of curvature R1cv of the second surface 312 may be 65.28 mm. However, it is not limited thereto.

The edge thickness Te of the first meniscus lens 110 may be the same as the center thickness Tc. The edge thickness Te of the first meniscus lens 110 may be greater than or equal to 1 mm and less than or equal to 3 mm. For example, the edge thickness Te of the first meniscus lens 110 may be 2.3 mm. The center thickness Tc of the first meniscus lens 110 may be greater than or equal to 1 mm and less than or equal to 3 mm. For example, the center thickness Te of the first meniscus lens 110 may be 2.3 mm.

4 shows a convex lens according to an embodiment of the present disclosure.

In the present disclosure, the convex lens may include a first convex lens 120 and a second convex lens 520 . The convex lens may include a third surface 411 and a fourth surface 412 . When the third surface 411 is an incident surface, the fourth surface 412 may be an emission surface. Also, when the third surface 411 is an exit surface, the fourth surface 412 may be an incident surface. In the case of the wireless transmission device 100, the fourth surface 412 may be an incident surface and the third surface 411 may be an exit surface. Conversely, in the case of the wireless receiving device 500, the third surface 411 may be an incident surface and the fourth surface 412 may be an exit surface. Hereinafter, the first convex lens 120 will be mainly described. Since the description of the second convex lens 520 is the same as that of the first convex lens 120, a detailed description thereof will be omitted.

The diameter d2 of the first convex lens 120 may be greater than or equal to 15 mm and less than or equal to 35 mm. For example, the diameter of the first convex lens 120 may be 25 mm. However, it is not limited thereto. The radius of curvature of the first convex lens 120 may be greater than or equal to 70 mm and less than or equal to 90 mm. For example, the radius of curvature of the first convex lens 120 may be 78.62 mm. However, it is not limited thereto. Also, the center thickness t2 of the first convex lens 120 may be greater than or equal to 3 mm and less than or equal to 5 mm. For example, the center thickness t2 of the first convex lens 120 may be 4 mm. In addition, the thickness ti of the edge of the first convex lens 120 may be greater than or equal to 1 mm and less than or equal to 3 mm. For example, the edge thickness ti of the first convex lens 120 may be 2 mm. However, it is not limited thereto.

The focal length f2 of the first convex lens 120 may be a straight line from the main point H of the first convex lens 120 to the focal point 420 of the first convex lens 120 . The focal length f2 may be determined based on the radii of curvature R21 and R22 of the first convex lens 120 and the refractive index n. For example, if it is assumed that the incident ray is parallel light, the focal length calculation formula is as follows.

Here, R21 = R22 = R2 may be. R21 and R22 may be radii of curvature of the first convex lens 120 . n may be greater than or equal to about 1.0 and less than or equal to 2.5. For example, n may be 1.89. f2 may be about k * R2. k is a real number and may be greater than or equal to 0.1 and less than or equal to 1. For example, k may be 0.56. However, it is not limited thereto.

When the wireless transmission device 100 is implemented as described above, it has been confirmed that the wireless transmission device 100 can transmit a large amount of data over 20 meters. In addition, it was confirmed that the wireless receiving device 500 may have the same structure as the wireless transmitting device 100, and normally receive large amounts of data at a distance of 20 meters or more from the wireless transmitting device 100. In addition, since the size of the above-mentioned lens is relatively small, a miniaturized transceiver can be implemented, so that users can easily place the transceiver.

As described above, since the configurations of the wireless transmission device 100 and the wireless reception device 500 are the same, there is no need to implement the wireless transmission device 100 and the wireless reception device 500 separately, which has an economical advantage.

5 is a diagram illustrating a wireless receiving device according to an embodiment of the present disclosure.

As already described, the wireless transmission device 100 and the wireless reception device 500 may have the same structure. Therefore, if the wireless transmission device 100 is used in the receiving side, it may become the wireless reception device 500. In addition, all descriptions of the wireless transmission device 100 may be applied to the wireless reception device 500. Hereinafter, the wireless receiving apparatus 500 will be described, and a description overlapping with that of the wireless transmitting apparatus 100 will be omitted.

The distance between the wireless transmission device 100 and the wireless reception device 500 may be 20 meters or more and 30 meters or less. However, it is not limited thereto, and the distance between the wireless transmission device 100 and the wireless reception device 500 may be less than 20 meters or greater than 30 meters. The wireless receiving device 500 may receive parallel optical signals from the wireless transmitting device 100 .

The wireless receiving device 500 may include a second convex lens 520 . The structure of the second convex lens 520 may be the same as that of the first convex lens 120 . The second convex lens 520 may be configured to irradiate the second meniscus lens 510 with a parallel optical signal for the mass data received from the wireless transmission device 100 .

The wireless receiving device 500 may include a second meniscus lens 510 . The structure of the second meniscus lens 510 may be the same as that of the first meniscus lens 110 . The second meniscus lens 510 may be spaced apart from the second convex lens 520 by a second distance L2. In addition, the second meniscus lens 510 may be configured to irradiate the optical signal irradiated from the second convex lens 520 to the core of the receiving optical cable 560 connected to the second optical cable connection terminal 530 . An optical axis of the second convex lens 520 may coincide with an optical axis of the second meniscus lens 510 .

The wireless receiving device 500 may include a second optical cable connection terminal 530 . The second optical cable connection terminal 530 may receive a pulsed optical signal from the second meniscus lens 510 . In addition, the second optical cable connection terminal 530 may be configured to transmit the pulsed optical signal received from the second meniscus lens 510 to the inverse conversion unit 550 using the receiving optical cable 560 . The second optical cable connection terminal 530 may be connected to the inverse conversion unit 550 by a receiving optical cable. One end of the receiving optical cable may be connected to the second optical cable connection terminal 530, and the other end of the receiving optical cable may be connected to the inverse conversion unit 550.

The second optical cable connection terminal 530 may include a reflector guide. An outer circumferential surface of an end of the receiving optical cable toward the second optical cable connection terminal may be surrounded by a reflector guide. The reflector guide may collect the pulsed optical signals received from the second meniscus lens 510 into the receiving optical cable. An inner circumferential surface of the reflector guide may be made of a material capable of reflecting an optical signal. Accordingly, when the pulsed optical signal received from the second meniscus lens 510 reaches the inner circumferential surface of the reflector guide, the reflector guide may reflect the light and transmit the light to the core of the receiving optical cable.

The reflector guide of the wireless receiving device 500 may extend in the direction of the second meniscus lens 510 from the end of the core of the receiving optical cable toward the second optical cable connection terminal. The length of the reflector guide extending from the end of the second optical cable connection terminal 530 side of the core of the receiving optical cable in the direction of the second meniscus lens 510 may be less than or equal to (2 * L1 * r)/d1. Here, L1 is the distance from the second optical cable connection terminal 530 to the second meniscus lens 510, r is the radius of the receiving optical cable, and d1 may be the diameter of the second meniscus lens 510. The distance from the second optical cable connection terminal 530 to the second meniscus lens 510 may be the same as the distance from the first optical cable connection terminal 130 to the first meniscus lens 110 . Also, the radius of the receiving optical cable may be the same as that of the transmitting optical cable. Also, the diameter of the second meniscus lens 510 may be the same as that of the first meniscus lens 110 .

The inverse conversion unit 550 may convert the optical signal into mass data. When inversely transforming the optical signal data, the inverse transform unit 550 may decompress using a standard or non-standard method.

6 is a diagram illustrating a control unit included in a wireless transmission/reception apparatus according to an embodiment of the present disclosure.

Referring to FIG. 6 , the wireless transmission/reception system 700 may include a controller 600. An integrated control unit 600 for controlling all of the wireless transceivers 100 and 500 may be included, but is not limited thereto. The wireless transmission device 100 and the wireless reception device 500 included in the wireless transmission/reception devices 100 and 500 may each include a control unit 600. The controller may include a processor 610 and a memory 620.

The processor 610 may perform an operation according to instructions stored in memory. However, it is not limited thereto, and the control unit 600 may include only a processor without including a memory. The processor 610 may be set to output a preset signal to an output line for a preset time. The wireless transmission device 100 and the wireless reception device 500 may perform preset operations according to signals. Operations of the wireless transmission device 100 and the wireless reception device 500 will be described in more detail below.

Referring back to FIG. 1, the wireless transmission apparatus 100 adjusts the first distance L1 between the first optical cable connection terminal 130 and the first meniscus lens 110, so that the pulsed laser light signal emitted from the LD or the first optical cable connection terminal 130 may not exceed the diameter of the first meniscus lens 110. Also, as described above, when the reflector guide 210 is adjusted, the pulsed laser light signal emitted from the first optical cable connection terminal 130 may not exceed the diameter of the first meniscus lens 110. The distance L1 between the first optical cable connection terminal 130 and the first meniscus lens 110 may be determined based on the radius of curvature and refractive index of the first meniscus lens 110 . In addition, when the focal point is located at the end 161 of the first optical cable connection terminal 130, the first distance L1 may converge to the focal length of the first meniscus lens 110.

The wireless transmission device 100 may include a first driving unit for moving the first meniscus lens 110 in the axial direction 170 . The wireless transmission device 100 may include a third driving unit for moving the first convex lens 120 in the axial direction 170 . The wireless transmission device 100 may control the first meniscus lens 110 to move in the axial direction 170 . The wireless transmission device 100 may include a sensor light intensity sensor. The wireless transmission device 100 may move the first meniscus lens 110 farthest from the first optical cable connection terminal 130 . In addition, the wireless transmission device 100 may move the first convex lens 120 to the farthest side from the first optical cable connection terminal 130. In addition, the wireless transmission device 100 may move the reflector guide 210 to the closest side from the first meniscus lens 110 . The wireless transmission device 100 may receive predetermined light using the first optical cable connection terminal 130 . The wireless transmission device 100 may acquire the amount of light output from the wireless transmission device 100 using a sensor while slowly moving the first meniscus lens 110 toward the first optical cable connection terminal 130 . The wireless transmission device 100 can keep the distance between the first meniscus lens 110 and the first convex lens 120 constant by moving the first convex lens 120 toward the first optical cable connection terminal 130 while slowly moving the first meniscus lens 110 toward the first optical cable connection terminal 130. The wireless transmission device 100 may stop the movement of the first meniscus lens 110 when the amount of light output from the wireless transmission device 100 starts to decrease. The wireless transmission apparatus 100 may place the first meniscus lens 110 at a position of the first meniscus lens 110 when the amount of light output from the wireless transmission apparatus 100 is maximum. The first distance L1 may be determined through this process. The wireless transmission device 100 may finely adjust the position of the first meniscus lens 110 based on a user's input.

The wireless transmission device 100 may include a second driving unit for moving the reflector guide 210 in the axial direction 170 . The wireless transmission device 100 may control the reflector guide 210 to move in the axial direction 170 . The wireless transmission device 100 may include a sensor light intensity sensor. The wireless transmission device 100 may move the reflector guide 210 to the closest side from the first meniscus lens 110 . The wireless transmission device 100 may receive predetermined light using the first optical cable connection terminal 130 . The wireless transmission device 100 may acquire the amount of light output from the wireless transmission device 100 using a sensor while slowly moving the reflector guide 210 away from the first meniscus lens 110 . The wireless transmission device 100 may stop the movement of the reflector guide 210 when the amount of light output from the wireless transmission device 100 starts to decrease. The wireless transmission device 100 may place the reflector guide 210 at a position of the reflector guide 210 when the amount of light output from the wireless transmission device 100 is maximum. The wireless transmission device 100 may finely adjust the position of the reflector guide 210 based on a user's input.

The distance L1 between the first optical cable connection terminal 130 and the first meniscus lens 110 may be 25 mm or more and 45 mm or less. For example, the distance L1 between the first optical cable connection terminal 130 and the first meniscus lens 110 may be 35 mm. The distance L1 between the first optical cable connection terminal 130 and the first meniscus lens 110 may be set to 35 mm. The wireless transmission device 100 may automatically or manually adjust the first distance L1 or the position of the reflector guide 210 through the above process.

When the position of the reflector guide 210 and the position of the first meniscus lens 110 are determined through the above process, the wireless transmission device 100 can adjust the position of the first convex lens 120. The second distance L2 between the first meniscus lens 110 and the first convex lens 120 may expand or reduce the diameter of the parallel light. The wireless transmission device 100 can optimally expand the diameter of the collimated light by adjusting the second distance L2.

The diameter of the first meniscus lens 110 may be smaller than or equal to the diameter of the first convex lens 120 . For example, the diameter of the first meniscus lens 110 may be 21 mm. Also, the diameter of the first convex lens 120 may be 25 mm. However, it is not limited thereto.

The wireless transmission device 100 may include a third driving unit for moving the first convex lens 120 in the axial direction 170 . The wireless transmission device 100 may control the first convex lens 120 to move in the axial direction 170 . The wireless transmission device 100 may include a sensor light intensity sensor. When determining the position of the first meniscus lens 110, the wireless transmission apparatus 100 may determine the initial position of the first convex lens 120. The wireless transmission device 100 may receive predetermined light using the first optical cable connection terminal 130 . The wireless transmission device 100 may obtain the amount of light output from the wireless transmission device 100 using a sensor while slowly moving the first convex lens 120 toward the first meniscus lens 110 . The wireless transmission device 100 may stop the movement of the first convex lens 120 when the amount of light output from the wireless transmission device 100 starts to decrease. The wireless transmission device 100 may place the first convex lens 120 at a position of the first convex lens 120 when the amount of light output from the wireless transmission device 100 is maximum. The wireless transmission device 100 may finely adjust the position of the first convex lens 120 based on a user's input. The second distance L2 may be determined based on the position of the first convex lens 120 and the position of the first meniscus lens 110 . The second distance may be greater than or equal to 55 mm and less than or equal to 75 mm. For example, the second distance may be 65 mm. However, it is not limited thereto.

In the above, the wireless transmission device 100 has been described, but a similar description may be possible for the wireless reception device 500. The wireless receiving device 500 adjusts the third distance L1 between the second optical cable connection terminal 530 and the second meniscus lens 510 so that the light passing through the second meniscus lens 510 is focused on the second optical cable connection terminal 530. More specifically, the wireless receiving device 500 adjusts the third distance L1 between the second optical cable connection terminal 530 and the second meniscus lens 510 so that the light passing through the second meniscus lens 510 is focused at the end of the core of the receiving optical cable 560 connected to the second optical cable connection terminal 530. Through this, the received light amount of the wireless receiving device 500 can be maximized. The third distance L1 may be the same as the first distance L1. A process of controlling the third distance L1 may be the same as that of controlling the first distance L1.

The wireless receiving device 500 may set the third distance L1 in the same way as the wireless transmitting device 100. Also, the third distance L1 determined by the wireless receiving device 500 may be determined by the radius of curvature and refractive index of the second meniscus lens 510 . The wireless receiving device 500 may place the second meniscus lens 510 away from the second optical cable connection terminal 530 by the focal distance of the second meniscus lens 510 . For example, the third distance L1 may be equal to the focal length of the second meniscus lens 510 . For example, the third distance L1 may be greater than or equal to 25 mm and less than or equal to 45 mm. The third distance L1 may be 35 mm. However, it is not limited thereto.

A distance between the second meniscus lens 510 and the second convex lens 520 may be a fourth distance L2. The fourth distance L2 may be the same as the second distance L2. The wireless receiving device 500 may include a second meniscus lens 510 having a small diameter in order to reduce the diameter of parallel light passing through the second convex lens 520 having a large diameter. The wireless receiving device 500 may adjust the fourth distance L2 to reduce the diameter of the parallel light passing through the second convex lens 520 and focus it to the second meniscus lens 510 .

The fourth distance L2 may be greater than or equal to 55 mm and less than or equal to 75 mm. The fourth distance L2 may be 65 mm. However, it is not limited thereto. The wireless receiving device 500 may control the fourth distance L2 so that light rays passing through the second convex lens 520 converge on the diameter of the second meniscus lens 510 . A process of controlling the fourth distance L2 may be the same as that of controlling the second distance L2.

8 is a perspective view of a wireless transmission/reception system according to an embodiment of the present disclosure.

The wireless transmission/reception system 700 may include the wireless transmission/reception devices 100 and 500. The wireless transmitting/receiving apparatus 100 or 500 may be a device that transmits/receives data using light. The wireless transmitting/receiving device 100 or 500 may include at least one of the wireless transmitting/receiving device 100 and/or the wireless receiving device 500 . The wireless transmission device 100 may generate parallel light by receiving light related to data to be transmitted from the conversion unit. In addition, the wireless receiving device 500 may receive the parallel light from the wireless transmitting device 100 and transmit it to the inverse conversion unit.

The wireless transmission/reception system 700 may include a left and right driving unit that is coupled to the wireless transmission/reception devices 100 and 500 and rotates based on a vertical axis perpendicular to the ground. In addition, the wireless transmission/reception system 700 may include a vertical driving unit coupled to the wireless transmission/reception devices 100 and 500 to rotate the wireless transmission/reception devices 100 and 500 based on a horizontal axis parallel to the ground. The up and down driving unit and the left and right driving unit may be implemented as an electric motor or a gear.

Referring to FIG. 9 to describe the left and right driving unit and the up and down driving unit.

9 is a diagram for explaining a left and right driving unit and an up and down driving unit according to an embodiment of the present disclosure.

The left and right driving unit and the up and down driving unit may be included in at least one of the wireless transmission device 100 and the wireless reception device 500 . According to various embodiments of the present disclosure, only the wireless transmission device 100 may be coupled to the vertical driving unit 812 and the left and right driving unit 814 . The driving unit 710 of the wireless transmission device 100 may include a vertical driving unit 812 and a left and right driving unit 814 . Referring to (a) of FIG. 9, the wireless transmission device 100 may be coupled to a vertical driving unit 812 and a left and right driving unit 814. The wireless transmission device 100 may be rotatable about the z-axis by the left and right driving unit 814 . For example, the z-axis may be perpendicular to the ground. The z axis may be a YAW axis. However, it is not limited thereto. The wireless transmission device 100 may be coupled to the vertical driving unit 812 . The wireless transmission device 100 may be rotatable about the x-axis by the vertical driving unit. For example, the x-axis may be parallel to the ground. The x-axis may be a PITCH axis. However, it is not limited thereto. The wireless transmission device 100 may irradiate parallel light in the y-axis direction. The x-axis, z-axis, and y-axis may be perpendicular to each other. The wireless receiving device 500 may not be coupled to the left and right driving units and up and down driving units. That is, the wireless receiving device 500 may not rotate based on the x-axis or z-axis.

According to various embodiments of the present disclosure, only the wireless receiving device 500 may be coupled to the vertical driving unit 822 and the left and right driving unit 824 . The driving unit 720 of the wireless receiving device 500 may include a vertical driving unit 822 and a left and right driving unit 824 . Referring to (b) of FIG. 9, the wireless receiving device 500 may be coupled to a vertical driving unit 822 and a left and right driving unit 824. The wireless receiving device 500 may be rotatable about the z-axis by the left and right driving unit 824 . For example, the z-axis may be perpendicular to the ground. However, it is not limited thereto. The wireless receiving device 500 may be coupled to the upper and lower driving unit 822 . The wireless receiving device 500 may be rotatable about the x-axis by the up and down driving unit. For example, the x-axis may be parallel to the ground. However, it is not limited thereto. The wireless receiving device 500 may receive parallel light in the y-axis direction from the wireless transmitting device 100 . The wireless transmission device 100 may not be coupled to the left and right driving units and up and down driving units. That is, the wireless transmission device 100 may not rotate about the x-axis or z-axis.

According to various embodiments of the present disclosure, both the wireless transmission device 100 and the wireless reception device 500 may be coupled to the up and down driving units 812 and 822 and the left and right driving units 814 and 824 . Therefore, both the wireless transmission device 100 and the wireless reception device 500 may rotate about the z-axis or about the x-axis.

The wireless transceivers 100 and 500 may align optical axes using the up and down driving unit and the left and right driving unit. For example, the wireless transmission device 100 may change an optical axis for irradiating parallel light using a vertical driving unit and a left and right driving unit. The control unit 600 may control the parallel light of the wireless transmission device 100 to reach the wireless reception device 500 by adjusting the optical axis of the wireless transmission device 100 . That is, the optical axis of the wireless transmission device 100 may coincide with the optical axis of the wireless reception device 500 . Conversely, the wireless receiving device 500 may change the direction for receiving the parallel light from the wireless transmitting device 100 using the up and down driving unit and the left and right driving unit. The control unit 600 may control the parallel light of the wireless transmission device 100 to reach the wireless reception device 500 by adjusting the light reception direction of the wireless reception device 500 . That is, the optical axis of the wireless transmission device 100 may coincide with the optical axis of the wireless reception device 500 . The control unit 600 may match the optical axis of the wireless transmission device 100 and the optical axis of the wireless reception device 500 by using both the vertical and horizontal driving units of the wireless transmission device 100 and the wireless reception device 500.

Although not shown in FIG. 8 , the wireless transmission/reception system 700 may include a sensor unit for measuring the azimuth of the wireless transmission/reception devices 100 and 500 . The wireless transceivers 100 and 500 coupled to the up and down driving unit and the left and right driving unit may include a sensor unit. That is, if the wireless transmission device 100 is coupled to the vertical driving unit and the left and right driving unit, the wireless transmission device 100 may include a sensor unit. In addition, if the wireless receiving device 500 is coupled to the vertical driving unit and the left and right driving unit, the wireless receiving device 500 may include a sensor unit.

The sensor unit is a component for measuring the orientation of the wireless transceivers 100 and 500 and may include a gyro sensor, a compass sensor (geomagnetic sensor), or an acceleration sensor.

In addition, the wireless transmission/reception system 700 may include a control unit 600. The control unit 600 may maintain the azimuth angle of the wireless transceiver at a constant level by controlling the left and right driving unit or the up and down driving unit based on the signal of the sensor unit. Here, the left and right driving unit or the up and down driving unit may be configured to maintain a constant 2D or 3D azimuth angle. A process for the control unit 600 to constantly maintain the azimuth angles of the wireless transceivers 100 and 500 will be described with reference to FIG. 10 .

The wireless transmission device 100 may include at least one transmission lens 811 . At least one transmission lens 811 may include at least one of a first meniscus lens 110 and a first convex lens 120 . However, it is not limited thereto. At least one transmission lens 811 may include a glass plate for protecting the first meniscus lens 110 or the first convex lens 120 .

At least one transmission lens 811 may be configured to receive a laser light signal related to transmission data from the conversion unit 150 and convert the laser light signal into parallel light.

The wireless receiving device 500 may include at least one receiving lens 821. At least one receiving lens 821 may include at least one of a second meniscus lens 510 and a second convex lens 520 . However, it is not limited thereto. At least one receiving lens 821 may include a glass plate for protecting the second meniscus lens 510 or the second convex lens 520 .

At least one receiving lens 821 may be configured to receive parallel light from the wireless transmission device 100 and transmit a pulsed optical signal based on the parallel light to the inverse conversion unit 550 . At least one receiving lens 821 may be disposed toward the wireless transmission device 100 .

The wireless receiving device 500 may include an optical screen 823. The optical screen 823 may be used to align the wireless transmission device 100 and the wireless reception device 500. One surface of the light screen 823 may include a plurality of light receiving elements. One side of the optical screen 823 may be a side facing the wireless transmission device 100 . One surface of the optical screen 820 may be parallel to a vertical axis (z-axis) and a horizontal axis (x-axis). The light receiving element may be an element that converts a light signal or light energy into an electrical signal or electrical energy. The light-receiving element may include a photoelectric amplifier using a photoelectron emission effect or a semiconductor light-receiving element using a quantum effect of a semiconductor. One side of the optical screen 823 may include a charge coupled device (CCD) sensor or a complementary metal-oxide semiconductor (CMOS) sensor.

As described above, the conversion unit 150 may include a laser diode that encodes transmission data to generate an electrical signal and converts the generated electrical signal into a laser light signal. In addition, the inverse conversion unit 550 may include a photodiode for converting the pulsed optical signal received from at least one receiving lens 821 into an electrical signal. Also, the inverse conversion unit 550 may restore the electrical signal converted by the photodiode into data.

10 is a flowchart for explaining the operation of a wireless transmission/reception system according to an embodiment of the present disclosure.

11 is a diagram for explaining the operation of a wireless transmission/reception system according to an embodiment of the present disclosure.

The controller 600 may perform step 1010 of determining an initial position of the wireless transmission/reception device so that parallel light of the wireless transmission device is directed to at least one receiving lens of the wireless reception device. The initial position may be a state in which optical axes of the wireless transmission device 100 and the wireless reception device 500 coincide. The controller 600 may determine the initial position using the optical screen 823 . The step 1010 of determining the initial positions of the wireless transceivers 100 and 500 will be described in detail with reference to FIG. 12 .

After determining the initial position, the controller 600 may perform step 1020 of measuring a first azimuth at the initial position based on the sensor unit. The first azimuth of the wireless transceiver 100 or 500 may include an angle with respect to the x-axis and an angle with respect to the z-axis. That is, the first azimuth may be expressed as (x, z) in two-dimensional coordinates. For example, the wireless transceivers 100 and 500 may express the first azimuth as (0,0). However, it is not limited thereto. The first azimuth may be a reference value for determining whether or not the azimuth of the wireless transceiver 100 or 500 is shifted from the initial position.

Referring to (a) of FIG. 11 , a point 1110 may indicate an x-axis or a z-axis. Also, the straight line 1120 may represent the first azimuth of the wireless transmission device 100. Although the wireless transmission device 100 is described in FIG. 11, the same description can be applied to the wireless reception device 500 as well. 11 shows only one of the x-axis or z-axis of the first azimuth, but is not limited thereto. The first azimuth may include the x-axis and the z-axis.

Referring back to FIG. 10 , the controller 600 may perform step 1030 of measuring the second azimuth at a predetermined cycle based on the sensor unit. The controller 600 may additionally measure the second azimuth after measuring the first azimuth.

If the sensor unit is a gyroscope, the sensor unit may measure the amount of change in angle at predetermined time intervals. For example, the predetermined time may be 10 ms or more and 1 second or less. The control unit 600 may calculate a difference value with respect to the first azimuth angle by integrating the change amount of the angle received from the sensor unit for a predetermined period. The controller 600 may further apply a Kalman filter to calculate a difference value for the first azimuth. The difference value may include a difference value on the x-axis and a difference value on the z-axis. The predetermined time may be 1 second or more and 1 hour or less. The controller 600 may obtain the second azimuth by adding the difference value to the first azimuth. The second azimuth may include an angle with respect to the x-axis and an angle with respect to the z-axis. That is, the second azimuth may be expressed as (x, z) in two-dimensional coordinates.

When the measurement value of the sensor unit is the amount of change in angle, steps 1030 and 1040 may be integrated. The controller may directly obtain the first difference value without measuring the second azimuth.

When the sensor unit is a geomagnetic sensor, the sensor unit may measure an azimuth at a predetermined cycle. For example, the predetermined period may have a value of 1 minute or more and 1 month or less. The controller 600 may obtain the azimuth measured by the sensor unit as the second azimuth. The second azimuth may include an angle with respect to the x-axis and an angle with respect to the z-axis. That is, the second azimuth may be expressed as (x, z) in two-dimensional coordinates.

Referring to (b) of FIG. 11 , a dotted line 1130 may indicate a second azimuth. 11 shows only one of the x-axis or z-axis of the second azimuth, but is not limited thereto. The second azimuth may include the x-axis and the z-axis.

The wireless transceivers 100 and 500 may move by an external force, and the second azimuth after the wireless transceivers 100 and 500 move may have a difference from the first azimuth. Of course, if the wireless transceivers 100 and 500 do not move, there may be no difference between the second azimuth and the first azimuth. When the second azimuth angle is different from the first azimuth angle, the optical axes of the wireless transmission device 100 and the wireless reception device 500 are different, and thus the amount of data transmission may decrease. Therefore, the control unit 600 may have to align the optical axes of the wireless transmission device 100 and the wireless reception device 500. At this time, when the step 1010 of determining the initial positions of the wireless transceivers 100 and 500 is performed again, there is an advantage in that the optical axes can be accurately matched, but there may be a disadvantage in that the speed is slow. Accordingly, the wireless transmission/reception system 700 may further perform a process for auxiliary and quick alignment of optical axes using a sensor unit.

Referring back to FIG. 10 , the controller 600 may perform step 1040 of determining a first difference value between the first azimuth angle and the second azimuth angle. The controller 600 may obtain a first difference value by subtracting the first azimuth from the second azimuth. However, the present invention is not limited thereto, and the controller 600 may obtain the first difference value by subtracting the second azimuth from the first azimuth. The second azimuth may mean a current azimuth of the wireless transceiving apparatus 100 or 500 . The second azimuth may change with time. The first azimuth may be an azimuth of an initial position in which the optical axes of the wireless transceivers 100 and 500 are aligned. The first azimuth may have the same value unless the initial positions of the wireless transceivers 100 and 500 are determined again.

Referring to (b) of FIG. 11 , an angle 1140 may indicate the magnitude of the first difference value. The first difference value may be expressed as a vector having a magnitude and a direction. The first difference value may include an x-axis value and a z-axis value. An x-axis value included in the first difference value may represent an angle rotated with respect to the x-axis. A z-axis value included in the first difference value may represent an angle rotated with respect to the z-axis.

11 shows only one of the x-axis or z-axis of the first difference value, but is not limited thereto. The first difference value may include an x-axis value and a z-axis value.

When the absolute value of the first difference value is less than the predetermined threshold difference value, referring to FIG. 10 again, the controller 600 may perform step 1030 again.

Referring back to FIG. 10 , when the absolute value of the first difference value is greater than or equal to a predetermined threshold difference value, the control unit 600 may perform step 1050 of generating a first control signal for at least one of the left and right driving unit or the vertical driving unit based on the first difference value. The critical difference value may be a predetermined value. The critical difference value may have a very small value. The threshold difference value may be determined based on the distance Ltr between the wireless transmission device 100 and the wireless reception device 500 . The critical difference value may be determined to be less than arctan(d2 /(2* Ltr)). Here, d2 is the diameter of the first convex lens 120, and Ltr may be the distance between the wireless transmission device 100 and the wireless reception device 500. The controller 600 may automatically determine the distance Ltr using a laser distance sensor included in at least one of the wireless transmission device 100 and the wireless reception device 500. At least one of determining the distance Ltr and determining the critical difference value may be included in step 1010 . The controller 600 may also receive the distance Ltr from the user.

When the value of the x-axis included in the first difference value is greater than or equal to the threshold difference value or the value of the z-axis included in the first difference value is greater than or equal to the threshold difference value, the control unit 600 may perform step 1050 of generating a first control signal for at least one of the left and right driving unit or the vertical driving unit based on the first difference value. However, it is not limited thereto, and the control unit 600 may perform step 1050 of generating a first control signal for at least one of the left and right driving unit or the vertical driving unit based on the first difference value when the size of the first difference value (((x-axis value)^2 + (z-axis value)^2)^(1/2)) is greater than or equal to the threshold difference value.

The wireless transmission/reception system 700 may store the angle change of the wireless transmission/reception device according to the degree of movement of the left and right driving units or up and down driving units in a predetermined table or a predetermined function. The degree of movement of the left and right driving unit or the up and down driving unit may be determined based on a control signal from the control unit 600 . The controller 600 may move the wireless transceivers 100 and 500 in the opposite direction to the first difference value so that the wireless transceivers 100 and 500 have the first azimuth again. The control unit 600 may generate the first control signal by applying an angle to which the wireless transceivers 100 and 500 should move to have the first azimuth again to a predetermined table or a predetermined function.

The first difference value may include an x-axis value and a z-axis value. The x-axis value included in the first difference value may represent an angle at which the wireless transceiver 100 or 500 is rotated with respect to the x-axis. The controller 600 may need to control the wireless transceiver 100 or 500 to move based on the x-axis in order to return to the first azimuth. That is, the control unit 600 may have to control the wireless transceivers 100 and 500 to move by the vertical driving unit. The control unit 600 may generate a control signal for the vertical driving unit based on the value of the x-axis of the first difference value. A control signal for the upper and lower driver may be included in the first control signal.

Also, the z-axis value included in the first difference value may indicate an angle at which the wireless transceiver 100 or 500 is rotated about the z-axis. The controller 600 may need to control the wireless transceiver 100 or 500 to move based on the z-axis in order to return to the first azimuth. That is, the controller 600 may have to control the wireless transceivers 100 and 500 to move by the left and right driving units. The control unit 600 may generate a control signal for the left and right driving unit based on the z-axis value of the first difference value. A control signal for the left and right driving units may be included in the first control signal.

The control unit 600 may obtain a control signal for the vertical driver of the first control signal based on the value of the x-axis included in the first difference value. In addition, the control unit 600 may obtain a control signal for the left and right driving units of the first control signal based on the z-axis value included in the first difference value.

The control unit 600 may perform step 1060 of controlling at least one of the left/right drive unit or the up/down drive unit based on the first control signal so that the wireless transceivers 100 and 500 face the first azimuth again. The control unit 600 may transmit a control signal for the upper and lower driver included in the first control signal to the upper and lower driver to control the upper and lower driver to be driven. In addition, the control unit 600 may control the left and right driving units to be driven by transmitting the values for the left and right driving units included in the first control signal to the left and right driving units.

As already described, the wireless transmission/reception apparatus 100 or 500 may include at least one of the wireless transmission apparatus 100 and the wireless reception apparatus 500. At least one of the wireless transmission device 100 and the wireless reception device 500 may include a vertical driving unit and a left and right driving unit. That is, one of the wireless transmission device 100 and the wireless reception device 500 may move based on the first control signal, and the other may remain still. However, it is not limited thereto, and based on the first control signal, the wireless transmission device 100 and the wireless reception device 500 may move to match optical axes.

In this way, since the wireless transmission device 100 and the wireless reception device 500 move using the sensor to match the optical axes, the wireless transmission device 100 and the wireless reception device 500 can quickly match the optical axes even while exchanging data. Therefore, the wireless transmission/reception system of the present disclosure has an effect of stably transmitting and receiving data. In the case of matching the optical axes in the same way as in step 1010, it may not be possible to match the optical axes during data transmission because it takes a long time. However, the wireless transmission/reception system according to the present disclosure can solve this problem.

After the step 1060 of controlling at least one of the left/right drive unit or the up/down drive unit based on the first control signal so that the wireless transceiver 100, 500 faces the first azimuth again, the control unit 600 may perform a step of measuring a third azimuth based on the sensor unit. The third azimuth may be an azimuth after the wireless transceiver 100 or 500 moves. The step of measuring the third azimuth angle may be performed in the same manner as the step 1030 of measuring the second azimuth angle.

The controller 600 may perform a step of determining a second difference value between the first azimuth and the third azimuth. The step of determining the second difference value may be performed in the same manner as the step 1040 of determining the first difference value.

When the absolute value of the second difference value is less than a predetermined threshold difference value, the control unit 600 may determine that the alignment of the optical axis is normally performed based on the first control signal. The controller 600 may perform step 1030 again.

Also, when the absolute value of the second difference value is greater than or equal to a predetermined threshold difference value, the controller 600 may perform a step of outputting an alarm signal indicating that there is an abnormality in the azimuth angle. That is, the wireless transmission/reception system 700 may output an alarm signal indicating that optical axis alignment is not achieved even though optical axis alignment is performed based on the first control signal. The user can take necessary actions based on the alarm signal. For example, when an alarm signal is output, the user may input an input indicating to perform step 1010 to the wireless transmission/reception system 700 .

In addition, the control unit 600 may perform step 1010 of automatically determining the initial position of the wireless transceiver when the absolute value of the second difference value is greater than or equal to a predetermined threshold difference value. The controller 600 may perform step 1010 of determining the initial position of the wireless transceiver instead of outputting an alarm signal. However, the present invention is not limited thereto, and the control unit 600 may perform step 1010 of determining the initial position of the wireless transceiver at the same time as the step of outputting the alarm signal.

The control unit 600 controls at least one of the left and right driving units or up and down driving units based on the first control signal so that the wireless transmission/reception apparatuses 100 and 500 face the first azimuth again (step 1060), and then determines whether the wireless transmission apparatus 500 receives the test collimated light from the wireless transmission apparatus 100. That the wireless receiving device 500 has received the test collimated light from the wireless transmitting device 100 may mean that at least one receiving lens 821 of the wireless receiving device 500 has received the test collimated light. The test collimated light received by at least one receiving lens 821 may be converted into an electrical signal by a photodiode included in the inverse conversion unit 550 .

The test collimated light may be collimated light having constant brightness instead of pulsed collimated light. However, it is not limited thereto, and the test collimated light may be pulsed collimated light. The control unit 600 may control the wireless transmission device 100 to transmit test collimated light. In addition, a step of determining whether the wireless receiving device 500 receives the test collimated light from the wireless transmitting device 100 may be performed. The control unit 600 may analyze the signal received by the wireless receiving device 500 to determine whether the wireless receiving device 500 has received the test collimated light.

For example, the controller 600 may determine whether the wireless receiver 500 receives the test collimated light based on whether a photodiode included in an inverse conversion unit connected to the wireless receiver 500 generates an electrical signal. The photodiode may generate an electrical signal when receiving light of a specific wavelength. In addition, the wireless transmission device 100 may transmit the test collimated light of the specific wavelength to the wireless reception device 500 . The control unit 600 may determine that the test collimated light of the wireless transmission device 100 has reached the wireless reception device 500 based on whether an electrical signal is generated by the photodiode. Therefore, the wireless transmitting/receiving system 700 can accurately determine whether the wireless receiving device 500 has received the test collimated light. In addition, the magnitude of the electrical signal generated by the photodiode may vary depending on the received wavelength. The control unit 600 may determine that the test collimated light of the wireless transmission device 100 has reached the wireless reception device 500 when the magnitude of the electrical signal from the photodiode is within a predetermined range.

Also, the control unit 600 may determine whether the wireless receiving device 500 has received the test collimated light based on the pulse pattern of the test collimated light received by the wireless receiving device 500 . The test collimated light transmitted by the wireless transmission device 100 may be a pulse having a specific pattern. When the pattern of the electrical signal generated by the photodiode through the wireless receiving device 500 matches the pattern of the test collimated light transmitted by the wireless transmitting device 100, the control unit 600 may determine that the wireless receiving device 500 has received the test collimated light.

When the wireless receiving device 500 does not receive the test collimated light from the wireless transmitting device 100, the control unit 600 may perform step 1010 of determining the initial positions of the wireless transmitting/receiving devices 100 and 500 again. In this way, the control unit 600 automatically re-determines the initial positions of the wireless transceivers 100 and 500, so that the best wireless communication state can always be maintained without the user's attention.

After performing the step 1060 of controlling at least one of the left and right driving units or the up and down driving units based on the first control signal so that the wireless transmitting/receiving devices 100 and 500 face the first azimuth again, when the optical screen 823 included in the wireless receiving device 500 receives test collimated light from the wireless transmitting device, step 1010 of determining the initial position of the wireless transmitting/receiving device again may be performed. Referring to FIG. 8 , the area of the optical screen 823 may be different from the area of at least one receiving lens 821 of the wireless receiving device 500 . Therefore, when the optical screen 823 receives the test collimated light, it may mean that at least one receiving lens 821 does not receive the test collimated light. Accordingly, the wireless transmission/reception system 700 may perform step 1010 of re-determining the initial position of the wireless transmission/reception device. When the step 1010 of re-determining the initial position of the wireless transceiver is performed, the controller 600 may output an alarm signal. Therefore, the user can know what situation is based on the alarm.

12 is a flowchart for explaining a step of determining an initial position of a wireless transceiver according to an embodiment of the present disclosure.

13 is a diagram for explaining a step of determining an initial position of a wireless transceiver according to an embodiment of the present disclosure.

The control unit 600 may perform the following steps to perform step 1010 of determining the initial position of the wireless transceiver.

The control unit 600 may perform step 1210 of controlling the wireless transmission device 100 to irradiate test collimated light to the wireless reception device 500 . The test collimated light may be an optical signal used to align optical axes of the wireless transmission device 100 and the wireless reception device 500 . The test collimated light can help quickly align optical axes of the wireless transmission device 100 and the wireless reception device 500 . The test collimated light may be collimated light having constant brightness instead of pulsed collimated light. However, it is not limited thereto, and the test collimated light may be pulsed collimated light. The control unit 600 may control the wireless transmission device 100 to transmit test collimated light. In addition, a step of determining whether the wireless receiving device 500 receives the test collimated light from the wireless transmitting device 100 may be performed. The control unit 600 may analyze the signal received by the wireless receiving device 500 to determine whether the wireless receiving device 500 has received the test collimated light.

The controller 600 may perform step 1220 of obtaining location information on the optical screen where the test collimated light has arrived. Since the initialization is not performed, the optical axis of the wireless transmission device 100 and the optical axis of the wireless reception device 500 may be distorted. Therefore, the test collimated light of the wireless transmission device 100 may not reach at least one receiving lens 821 of the wireless reception device 500 . For example, the test collimated light 1311 reaching the optical screen 823 of the wireless receiving device 500 may be shown in (a) of FIG. 13 .

Of course, when the test collimated light of the wireless transmission device 100 reaches at least one receiving lens 821 of the wireless reception device 500 even though the initialization is not performed, the step of determining the initial position of the wireless transmission/reception device 100, 500 can be finished.

The control unit 600 may obtain a position at which the test collimated light is received with respect to predetermined coordinate axes (a, b) of the optical screen 823 . For example, the upper left vertex of the optical screen 823 has the coordinates of (0,0), and the value of the a-axis increases as it goes to the right, and the value of the b-axis increases as it goes downward. However, it is not limited thereto. In the present disclosure, the coordinate axes of the optical screen 823 are described as the a-axis and the b-axis in order to distinguish the x-axis and the z-axis. However, the a-axis can be parallel to the x-axis, and the b-axis can be parallel to the z-axis.

The light screen 823 may include a plurality of light receiving elements. The controller 600 may determine location information on the optical screen 823 to which the test collimated light arrives based on the coordinates of the plurality of light-receiving elements included in the optical screen 823 . Each of the plurality of light receiving elements may correspond to one predetermined coordinate value. When one light-receiving element among the plurality of light-receiving elements receives the test collimated light, the coordinates of the corresponding light-receiving element may be location information on the optical screen to which the test collimated light has arrived. If a plurality of light-receiving elements among the plurality of light-receiving elements receive the test collimated light, an average value of coordinates of the plurality of light-receiving elements receiving the test collimated light may be location information on the optical screen at which the test collimated light arrives.

When the size of the test collimated light reaching the optical screen 823 is smaller than the size (radius) of the at least one receiving lens 821, the control unit 600 adjusts the size of the test collimated light to the size of the at least one receiving lens 821. It may perform a process for matching the size. The size of at least one receiving lens 821 may be the diameter d2 of the convex lens. For example, the wireless transmission device 100 may include a focus driver 813. The focus driver 813 of the wireless transmission device 100 adjusts the position of the focal point of at least one transmission lens 811 to adjust the size of the test collimated light reaching the optical screen 823 of the wireless reception device 500 to be smaller or larger. The controller 600 may adjust the position of the focal point of the at least one transmission lens 811 by changing the position of the at least one transmission lens 811 through the focus driver 813 .

The controller 600 may determine the size of the test collimated light reaching the optical screen 823 based on the number of light receiving elements included in the light screen 823 that have received the test collimated light. The control unit 600 may store a table in which the number of light-receiving elements receiving the test collimated light corresponds to the size of the test collimated light reaching the optical screen 823 . The controller 600 may determine the size of the test collimated light reaching the optical screen 823 based on the table.

For example, as shown in (a) of FIG. 13, when the size of the test collimated light reaching the optical screen 823 is smaller than the size of at least one receiving lens 821, the controller 600 controls the focus driver 813 to change the position of at least one transmitting lens 811, thereby adjusting the size of the test collimated light reaching the optical screen 823 to be equal to the size of the at least one receiving lens 821. This process may be the same as FIG. 13(b) and FIG. 13(c).

In addition, when the size of the test collimated light reaching the optical screen 823 is greater than the size of the at least one receiving lens 821, the control unit 600 controls the focus driving unit 813 to change the position of the at least one transmitting lens 811, thereby adjusting the size of the test collimated light reaching the optical screen 823 to be equal to the size of the at least one receiving lens 821.

The control unit 600 may perform step 1230 of obtaining a differential position vector 1321 between the position information of the test collimated light and the predetermined position of at least one receiving lens 821 . The controller 600 may store a predetermined position of at least one receiving lens 821 . The controller 600 may obtain the differential position vector 1321 by subtracting position information of the test collimated light from the position of at least one receiving lens 821 . The differential position vector 1321 may include a distance and a direction that the test collimated light must travel to reach the at least one receiving lens 821 . When the test collimated light reaches at least one receiving lens 821, optical axes of the wireless transmission device 100 and the wireless reception device 500 may be aligned.

The control unit 600 may perform step 1240 of generating a second control signal for at least one of the left and right driving unit and the up and down driving unit based on the difference position vector 1321 . The second control signal may include a control signal for the vertical driving unit and a control signal for the left and right driving unit.

The wireless transmission/reception system 700 may store the angle change of the wireless transmission/reception device according to the degree of movement of the left and right driving units or up and down driving units in a predetermined table or a predetermined function. The degree of movement of the left and right driving unit or the up and down driving unit may be determined based on a control signal from the control unit 600 .

When the distance to which the test collimated light moves on the optical screen 823 is determined, the controller 600 may determine the angle change of the wireless transceivers 100 and 500 . For example, the angle change of the wireless transmission device 100 may be arctan (i/Ltr). Here, Ltr may be a distance between the wireless transmission device 100 and the wireless reception device 500. In addition, i may be the distance that the test collimated light on the light screen 823 moves. Also, the angle change of the wireless receiving device 500 may be arctan (i/lr). Here, lr may be a distance from the z-axis or x-axis of the wireless receiver 500 to the optical screen 823. In addition, i may be the distance that the test collimated light on the light screen 823 moves.

The control unit 600 may move the wireless transmission/reception apparatuses 100 and 500 by the difference position vector 1321 so that the optical axes of the wireless transmission apparatus 100 and the wireless reception apparatus 500 coincide. The control unit 600 may generate the second control signal by applying an angle at which the optical axes of the wireless transmission device 100 and the wireless reception device 500 must be moved to coincide with a predetermined table or a predetermined function.

As already described, in the present disclosure, the coordinate axes of the optical screen 823 are described as the a-axis and the b-axis in order to distinguish the x-axis and the z-axis. However, the a-axis can be parallel to the x-axis, and the b-axis can be parallel to the z-axis.

The difference position vector 1321 may include an a-axis value and a b-axis value. The control unit 600 may determine a control signal for the left and right driving unit of the second control signal based on the value of the a-axis of the difference position vector 1321 . In addition, the control unit 600 may determine a control signal for the vertical driver of the second control signal based on the b-axis value of the difference position vector 1321 .

For example, the differential position vector 1321 may be equal to (a1, b1). Here, a1 may represent a distance that the test collimated light should move in the horizontal direction (a-axis). The controller 600 may determine the rotation angle of the wireless transmission device 100 as arctan (a1/Ltr). Ltr may be the distance between the wireless transmission device 100 and the wireless reception device 500. In addition, the control unit 600 applies the determined rotation angle to a predetermined table or function to determine a control signal for the left and right driving units of the wireless transmission device 100 included in the second control signal.

Also, b1 may indicate a distance that the test collimated light should move in the vertical direction (b-axis). The controller 600 may determine the rotation angle of the wireless transmission device 100 as arctan (b1/Ltr). In addition, the control unit 600 may apply the determined rotation angle to a predetermined table or function to determine a control signal for the up and down driving unit of the wireless transmission device 100 included in the second control signal.

The above has been described based on the wireless transmission device 100, but is not limited thereto. The controller 600 may determine the rotation angle of the wireless receiving device 500 as arctan (a1/lr). Here, lr may be the distance from the z-axis of the wireless receiving device 500 to the optical screen 823. In addition, the control unit 600 may determine a control signal for the left and right driving units of the wireless receiving device 500 included in the second control signal by applying the determined rotation angle to a predetermined table or function. Also, the controller 600 may determine the rotation angle of the wireless receiving device 500 as arctan (b1/lr). lr may be the distance from the x-axis of the wireless receiving device 500 to the optical screen 823. In addition, the control unit 600 may apply the determined rotation angle to a predetermined table or function to determine a control signal for the upper and lower driving unit of the wireless receiving device 500 included in the second control signal.

The control unit 600 may perform step 1250 of controlling at least one of the left and right driving unit and the up and down driving unit based on the second control signal so that the test collimated light is irradiated to the position of the at least one receiving lens 821 . The control unit 600 may transmit a control signal for the upper and lower driver included in the second control signal to the upper and lower driver to control the upper and lower driver to be driven. In addition, the control unit 600 may control the left and right driving unit to be driven by transmitting the value for the left and right driving unit included in the second control signal to the left and right driving unit. This process may be the same as FIG. 13(d) to FIG. 13(f). In FIG. 13 , the control unit 600 first moves the test collimated light in a horizontal direction and then moves it in a vertical direction, but is not limited thereto. The controller 600 may first move the test collimated light in a vertical direction and then move it in a horizontal direction.

As already described, the wireless transmission/reception apparatus 100 or 500 may include at least one of the wireless transmission apparatus 100 and the wireless reception apparatus 500. At least one of the wireless transmission device 100 and the wireless reception device 500 may include a vertical driving unit and a left and right driving unit. That is, based on the second control signal, one of the wireless transmission device 100 and the wireless reception device 500 may move, and the other may remain still. However, it is not limited thereto, and based on the first control signal, the wireless transmission device 100 and the wireless reception device 500 may move to match optical axes.

When a predetermined time elapses after performing step 1020 of measuring the first azimuth, the controller 600 may perform a step of determining the initial positions of the wireless transceivers 100 and 500 again. For example, the controller 600 may perform at least one of step 1010 or step 1020. The step of re-determining the initial position may be the same as the process of FIG. 12 . Alternatively, only step 1020 may be performed again. The predetermined time may be one day or more and one year or less. The predetermined time may be changeable based on a user's input. In this way, by periodically determining the first azimuth angle, the optical axes of the wireless transmission device 100 and the wireless reception device 500 can always be aligned. In addition, the distortion of the optical axis due to the accumulation of errors in the sensor unit may be periodically initialized.

In addition, the control unit 600 may perform a step of re-determining the initial position of the wireless transceiver when the first difference value is greater than or equal to the threshold difference value is equal to or greater than a predetermined threshold number of times. The threshold number of times may be 5 or more. In this way, by periodically determining the first azimuth angle, the optical axes of the wireless transmission device 100 and the wireless reception device 500 can always be aligned. In addition, the distortion of the optical axis due to the accumulation of errors in the sensor unit may be periodically initialized.

Also, the controller 600 may measure the amount of change per hour in the value of the gyro sensor or the amount of change per time in the value of the acceleration sensor. For example, the controller 600 may measure the angular acceleration or acceleration of the wireless transceiver 100 or 500 . The controller 600 may perform steps 1210 to 1250 of FIG. 12 when the angular acceleration or the acceleration value is greater than or equal to a predetermined threshold acceleration value. In addition, the controller 600 may perform steps 1050 to 1060 when the angular acceleration or acceleration value is greater than or equal to a predetermined threshold acceleration value. At this time, it is not determined whether the first difference value is greater than or equal to the threshold difference value, and a first control signal is generated to drive at least one of the left and right driving units and the vertical driving units.

When the angular acceleration or acceleration value is greater than or equal to a predetermined threshold acceleration value, a large external force may be applied to the wireless transceiver apparatus 100 or 500. Therefore, the reliability of the wireless transmission/reception system 700 can be increased by performing the process of aligning the optical axis regardless of whether the first difference value is greater than or equal to the threshold difference value.

So far, we have looked at various embodiments. Those skilled in the art to which the present invention pertains will be able to understand that the present invention can be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered from an illustrative rather than a limiting point of view. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the equivalent scope will be construed as being included in the present invention.

On the other hand, the above-described embodiments of the present invention can be written as a program that can be executed on a computer, and can be implemented in a general-purpose digital computer that operates the program using a computer-readable recording medium. The computer-readable recording medium includes storage media such as magnetic storage media (eg, ROM, floppy disk, hard disk, etc.) and optical reading media (eg, CD-ROM, DVD, etc.).

Claims (8)

A wireless transmitting/receiving device including at least one of a wireless transmitting device that transmits/receives data using light and generates parallel light by receiving light related to the data to be transmitted from the conversion unit and a wireless receiving device that receives the parallel light and transmits the parallel light to the inverse transform unit;
Left and right driving units that are coupled to the wireless transceiver and rotate based on a vertical axis perpendicular to the ground;
an up and down driving unit for rotating the wireless transceiver on a horizontal axis parallel to the ground;
a sensor unit for measuring an azimuth of the wireless transceiver; and
and a control unit controlling the left and right driving unit or the up and down driving unit based on the signal of the sensor unit to keep the azimuth angle of the wireless transmission/reception device constant.
According to claim 1,
The control unit,
determining an initial position of the wireless transmitting/receiving device so that parallel light of the wireless transmitting device is directed to at least one receiving lens of the wireless receiving device;
After determining the initial position, measuring a first azimuth at the initial position based on the sensor unit;
Measuring a second azimuth at a predetermined cycle based on the sensor unit;
determining a first difference value between the first azimuth angle and the second azimuth angle;
When the absolute value of the first difference value is greater than or equal to a predetermined threshold difference value, generating a first control signal for at least one of the left and right driving unit or the up and down driving unit based on the first difference value;
A wireless transmission/reception system for controlling at least one of the left and right driving units or the up and down driving units based on the first control signal so that the wireless transmission/reception apparatus faces a first azimuth again.
According to claim 2,
The control unit,
After controlling at least one of the left and right driving unit or the up and down driving unit based on the first control signal so that the wireless transmission/reception device faces the first azimuth again, a third azimuth is measured based on the sensor unit,
determining a second difference value between the first azimuth angle and the third azimuth angle;
and outputting an alarm signal indicating that there is an abnormality in the azimuth angle when the absolute value of the second difference value is greater than or equal to a predetermined threshold difference value.
According to claim 3,
The control unit,
After controlling at least one of the left and right driving unit or the up and down driving unit based on the first control signal so that the wireless transmitting/receiving device faces the first azimuth again, the wireless receiving device determines whether or not to receive test collimated light from the wireless transmitting device,
When the wireless receiving device does not receive the test collimated light from the wireless transmitting device, determining the initial position of the wireless transmitting/receiving device again;
and re-determining the initial position of the wireless transmitting/receiving device when the absolute value of the second difference value is greater than or equal to a predetermined threshold difference value.
According to claim 4,
After controlling at least one of the left and right driving unit or the up and down driving unit based on the first control signal so that the wireless transmitting/receiving device faces the first azimuth again, the optical screen included in the wireless receiving device When receiving test parallel light from the wireless transmitting device, the wireless transmitting/receiving system determines the initial position of the wireless transmitting/receiving device again.
According to claim 2,
The wireless transmission device,
At least one transmission lens for receiving a laser light signal related to the transmission data from the converter and converting the laser light signal into parallel light;
The wireless receiver,
the at least one receiving lens for receiving parallel light from the wireless transmission device and transmitting a pulsed optical signal based on the parallel light to an inverse conversion unit; and
It is used to align the wireless transmitting device and the wireless receiving device, and includes an optical screen including a plurality of light receiving elements on a surface facing the wireless transmitting device,
The conversion unit includes a laser diode that encodes the transmission data to generate an electrical signal and converts the generated electrical signal into a laser optical signal;
wherein the inverse conversion unit includes a photodiode for converting the pulsed optical signal received from the at least one receiving lens into an electrical signal and restores the electrical signal converted by the photodiode into data.
According to claim 6,
The control unit determines the initial position of the wireless transceiver,
Control the wireless transmitting device to irradiate test collimated light to the wireless receiving device;
Acquiring positional information on the optical screen where the test collimated light arrives;
Obtaining a differential position vector between the position information and a position of at least one predetermined receiving lens;
Generating a second control signal for at least one of the left and right driving unit or the up and down driving unit based on the difference position vector;
A wireless transmission/reception system for controlling at least one of the left and right driving units or the up and down driving units based on the second control signal so that the test collimated light is radiated to a position of the at least one receiving lens.
According to claim 2,
When a predetermined time elapses after measuring the first azimuth, determining the initial position of the wireless transceiver again;
and re-determining an initial position of the wireless transceiver when the first difference value is greater than or equal to the threshold difference value is equal to or greater than a predetermined threshold number of times.