Aviation route and air corridor generation method and system

Abstract

The present invention relates to a method for transmitting two signals to the sky and guiding a course to an aircraft using a plane or a curved surface constituted by points at which the two signals are simultaneously received, and provides a flight course (Route) and an air corridor (Corridor) of the aircraft by a line or corridor obtained by intersecting a plurality of planes or curved surfaces formed by the two signals with each other.

Description

Technical Field

[0001] The present invention relates to a route guidance technology for aircraft, and in particular, to a technology for guiding routes by generating air routes and air corridors through wireless signals. Background Art

[0002] With the increase of three-dimensional transportation devices such as drones, private aircraft, and unmanned aerial vehicles, in order to operate a large number of flying objects in a limited space in response to the gradually increasing air traffic volume, it is necessary to specify the types of flying aircraft and flight paths according to the airspace, and provide air corridors (Corridors) in the form of routes and tubes.

[0003] As described in Korean Patent Publication Nos. 1020180137376, 1020190050309, and 1020200123714, if signals are sent from two locations at the same time, a plane is formed by the points where the two signals arrive at the same time, and this characteristic is used to provide a method for guiding a route, guiding a landing, and providing a route.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Korean Patent Publication No. 1020180137376

[0007] Patent Document 2: Korean Patent Publication No. 1020190050309

[0008] Patent Document 3: Korean Patent Publication No. 1020190111054 Summary of the invention

[0009] Technical issues

[0010] With the increase of three-dimensional traffic devices, in order to deal with the increasing air traffic volume, the route and corridor navigation method should be used to consider the use of precision satellite navigation method and image-based relative navigation method. The precision satellite navigation method has the problem of satellite radio wave reception failure, while the image navigation method has the problem of image acquisition caused by snow, rain, fog, etc.

[0011] Prior art Korean Publication Patent No. 1020180137376 and No. 1020190050309 provide straight routes or curved routes by sending two guidance signals simultaneously or with a time difference and using the points received at the same time. Although the two prior arts provide directional information of the route, they cannot provide altitude information. Therefore, it is necessary to use an altimeter or GPS to fly to a specified altitude. When the altimeter or GPS fails, there will be a risk of collision with surrounding aircraft in the up and down directions. In addition, the prior art Korean Publication Patent No. 1020190111054 defines the flight path through beams emitted by two base stations in opposite directions and determines the altitude using an additional barometer.

[0012] In order to solve the above-mentioned problems, the purpose of the present invention is to provide a technology that generates routes and air corridors that guide flight direction and flight altitude through wireless communication, and can guide safe routes and air corridors even in bad weather / limited vision and GPS failure.

[0013] Technical Solution

[0014] As two signals are sent from the signal source, a virtual surface is formed by the points where the signals are received simultaneously. Two surfaces formed by the two signal sources are intersected in the sky to generate a line and used as a route to guide the flight direction and flight altitude, and four surfaces formed by four signal sources are intersected in the sky to form a corridor of square columns and used as an air corridor to guide the flight direction and flight altitude. The aircraft flight route is controlled based on the position where the receiving terminal receives all signals simultaneously, and the air corridor is operated by controlling the route according to the position where all air corridor internal identifier signals are preferentially received.

[0015] Effects of the Invention

[0016] The present invention has the following effects: even in weather conditions such as fog, snow, rain, etc. where it is difficult to ensure visibility, the route of an aircraft can be accurately guided by route guidance radio waves sent from the ground, and route guidance can be achieved even in GPS-disabled areas. The rapid route recognition speed of the navigation system can quickly achieve route guidance for high-speed flying objects, and precise routes and air corridors can minimize the width of the routes between aircraft, thereby allowing more aircraft to operate in the same space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In this specification, the drawings illustrate preferred embodiments of the present invention. In all the attached drawings, the same structural elements are given the same figure marks. In order to emphasize and clarify the description, exaggerated expressions or situations that are difficult to express in the drawings are omitted in the drawings. The drawings are only used to further understand the technical ideas in detail in combination with the specific embodiments and should not be interpreted as being limited to the matters shown in the drawings.

[0018] Figure 1 This diagram illustrates the simultaneous arrival point of two signals.

[0019] Figure 2 2 is a diagram illustrating a method for generating a flight route according to an embodiment of the present invention.

[0020] Figure 3 The figure is a diagram illustrating a method for generating corridors according to an embodiment of the present invention.

[0021] Figure 4 The figure is a structural diagram of a signal transmitter and a receiving terminal according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In the following description, a number of details are disclosed in order to further fully describe the embodiments of the present invention. However, it should be clear that a person of ordinary skill in the art to which the present invention belongs can implement the embodiments of the present invention without such some specific details. As another example, known structures and devices are shown in the form of block diagrams instead of detailed descriptions to prevent the embodiments of the present invention from becoming obscure. Moreover, in the different embodiments described below, unless otherwise stated, features may also be combined with each other. In the description process, the terms used are appropriately defined for the purpose of describing the present invention, and the terms should be interpreted based on the meaning and concept that conforms to the technical ideas.

[0023] Also, detailed descriptions related to well-known functions and structures that may unnecessarily obscure the gist of the present invention will be omitted.

[0024] As we all know, in the same medium, all signals with the same characteristics travel at the same speed and the same distance in the same time. The trajectory formed by points with a distance difference of 0 (zero) from two vertices becomes a straight line on the plane and a plane in space, and the trajectory formed by points with the same distance difference becomes a hyperbola and a hyperbolic surface.

[0025] Hereinafter, the present embodiment will be described in detail with reference to the accompanying drawings so that a person skilled in the art can easily implement the present invention.

[0026] Figure 1 This is a diagram illustrating the simultaneous arrival point of two signals. Figure 1, if the first antenna 101 and the second antenna 102 send signals at the same time, the two signals move the same time and arrive at the same distance at the same point 110 with a distance difference of 0 (Zero). If the second antenna 102 sends a signal later than the first antenna 101 according to the time difference, the signal of the second antenna 102 moves a smaller distance according to the time difference compared to the signal of the first antenna 101, and the two signals arrive at the point 120 with a distance difference according to the time difference between the two antennas at the same time. If two signals are sent at the same time, if they are sent to the plane 111 according to the time difference, they arrive at the curved surface 121 at the same time, and the points that arrive at the same time constitute a plane or a curved surface. If two signals are received at the same time, they can be regarded as being located on the plane or the curved surface.

[0027] Although it is possible to quickly and easily identify the position on a plane or curved surface by receiving two signals at the same time, it is not possible to specify an exact point. Two faces can be crossed to represent a line, and three faces can be crossed to represent three lines, a triangular prism, a point, or two lines, etc. Therefore, a position, direction, height, line, area, or space can be specified by multiple faces.

[0028] Figure 2 This is a diagram for generating a straight line route according to an embodiment of the present invention. Although the diagram for explaining a curved line route is omitted, a curved line route generated by a plane and a curved surface or by the intersection of curved surfaces can be estimated.

[0029] Reference Figure 2 , two signals are simultaneously sent in a direction perpendicular to the ground and in a direction inclined at a predetermined angle in the vertical direction to form a first guide surface 211, so that a plane including the designated route 200 on the aviation map is formed through the two antennas of the first signal source 201, and two signals are simultaneously sent in a direction perpendicular to the ground and in a direction inclined at a predetermined angle to form a second guide surface 211, so that a plane including the designated route 200 on the aviation map is formed through the two antennas of the second signal source 202, and the first guide surface 211 and the second guide surface 221 intersect on the designated route 200 in the sky, and a route of a designated direction and altitude can be provided to the aircraft through wireless signals. The aircraft simultaneously receives the signals sent by the first signal source 201 and the second signal source 202 that generate the route 200, and if the flight of the aircraft is controlled, the aircraft can fly in the direction and flight altitude of the route 200.

[0030] If a route identifier is added to the signal generating the route 200, the route identifier can be used to distinguish the signals of each route that overlap during the route conversion, branching, and merging process to achieve route navigation. In addition, route information required for aircraft navigation can also be added.

[0031] A curved route can also be provided if two signals sent by a signal source with a time difference form a curved surface or a plane or a curved surface is formed by one signal source and intersected with each other to generate a curve.

[0032] By combining and connecting the straight routes and curved routes generated by the signal source, various routes can be realized. In addition, multiple routes can be used to provide multiple routes like multi-lane roads on the ground.

[0033] If a plurality of routes 200 identical to the air routes (ATS routes) on the air map are generated and matched with the air routes, a route network can also be constructed.

[0034] Figure 3 Although the curved rectangular skywalk is omitted in the figure, it can also be inferred that the curved rectangular skywalk is generated by two planes and two curved surfaces or by the intersection of two curved surfaces and two curved surfaces.

[0035] Reference Figure 3 , utilizing the feature that a plane is formed by points that simultaneously receive two signals, two signals are simultaneously sent from the first signal source 301 along a direction inclined at a prescribed angle in a direction perpendicular to the ground to form a first surface that matches the first interface 311 of the sky corridor 300, two signals are simultaneously sent from the second signal source 302 along a direction inclined at a prescribed angle in a direction perpendicular to the ground to form a second surface that matches the second interface 312 of the sky corridor 300, two signals are simultaneously sent from the third signal source 303 along a direction inclined at a prescribed angle in a direction perpendicular to the ground to form a third surface that matches the third interface 313 of the sky corridor 300, and two signals are simultaneously sent from the fourth signal source 304 along a direction inclined at a prescribed angle in a direction perpendicular to the ground to form a fourth surface that matches the fourth interface 314 of the sky corridor 300.

[0036] The first plane 311, the second plane 312, the third plane 313, and the fourth plane 314 composed of signals sent from the first signal source 301, the second signal source 302, the third signal source 303, and the fourth signal source 304 are intersected with each other in the sky to generate an air corridor identical to the air corridor 300. If the aircraft is controlled to preferentially receive the signal A2 of the first signal source 301, the signal A1 of the second signal source 302, the signal A2 of the third signal source 303, and the signal A1 of the fourth signal source 304, the aircraft can navigate inside the air corridor 300.

[0037] If you Figure 3If a fifth signal source is added to the air corridor 300 to form a fifth surface parallel to the first interface 311 and the fifth surface is located between the first interface 311 and the second interface 312, the fifth surface formed intersects with the third interface 313 and the fourth interface 314, and the air corridor 300 is divided into two air corridors. The two divided air corridors can be used as air corridors for low speed, high speed or overtaking, up and down, etc. The air corridor is divided by multiple surfaces formed by multiple signal sources, or multiple air corridors are generated by adding interfaces of the air corridor to distinguish them according to various uses such as aircraft type, speed, flight direction, etc., thereby forming multiple air corridors like multi-lane roads on the ground.

[0038] exist Figure 3 In the example, four signal sources are used to generate a straight rectangular sky corridor, but three signal sources may be used to intersect three interfaces to generate a triangular sky corridor. More than three interfaces may also be used to generate a polygonal sky corridor.

[0039] The signal sent by the signal source may be supplemented with an air corridor indicator and an identifier indicating inside / outside the corridor, and may also be supplemented with air corridor information required for the navigation of the sending aircraft.

[0040] One or more flight routes 200 may be generated inside the air corridor 300 to form an air corridor including a plurality of tracks.

[0041] If a plurality of straight-line sky corridors and curved sky corridors generated by the signal source are cross-connected with each other, sky corridors of various shapes can be formed.

[0042] The aerial corridor network can also be constructed by connecting all corridor starting points, corridor conversion points, corridor branch points, corridor confluence points, and corridor end points on the aerial map to generate aerial corridors.

[0043] The signal source needs to accurately transmit the signal without time error in order to obtain a plane or curved surface. In order to transmit the signal without time error, when the distance between the antennas transmitting the two signals is relatively close, if a signal source generates two signals and transmits the transmitted signals to the two antennas through a transmission cable with the same characteristics and length, the movement time between the generation and transmission of the two signals is the same and they are accurately transmitted to the antennas. In addition, at a location that is the same physical distance as the two transmitting antennas, transmission to the two transmitting antennas via a wireless signal is equivalent to transmission using a transmission cable of the same length, which is also very suitable for situations where the distance between the two transmitting antennas is relatively far. In the case where the distance between the two transmitting antennas is relatively far and there are obstacles, if each time device has to be used, it is necessary to monitor and manage the two time devices at all times in order to prevent time errors and correct transmission time errors.

[0044] By sending two signals from a signal source simultaneously or with a time difference, a time difference between the two signals can be generated inside the signal source. Since the movement time can be obtained based on the transmission distance of the signal, the time difference between the two signals can also be generated based on the difference in transmission cable length between the signal source and the two transmitting antennas or the difference in transmission distance of the wireless signal.

[0045] Even if the same components are assembled on the same circuit board under the same conditions, there are slight deviations in the signal processing time of each circuit board. Even if the same two circuit boards process signals through the same process, the slight error in processing time may cause an error in the transmission time of the two signals sent from the signal source. If there is an error in the transmission time between the two signals, the plane is bent into a curved surface, and the curvature of the curved surface changes, affecting the accuracy of the route. By adding the function of detecting and correcting the transmission error of the two signals to the signal source, the accurate route can be always maintained by frequently detecting and correcting the transmission time error.

[0046] In order to realize the function of the signal source detecting the transmission time error of the two signals and correcting the error, a receiving unit, a comparison unit and an error correction unit for the two signals may be added.

[0047] In order to detect the transmission time error of the signal source, error detection can be performed on the transmission signal of the antenna connection part, or the transmitted signal can be received to detect the error, or the error can be eliminated by receiving external error correction information.

[0048] An error detector is set at a point where two signals are received simultaneously (a position on a plane or a curved surface) and at a position that is the same physical distance between the two transmission points. When two signals are received according to the time difference, as the signal is received from the error detector, if the information of the signal judged as an error and received first or the signal received later is notified to the signal source to correct the error, the external error information can enable the signal source to always maintain accurate transmission time. In addition, an error detector can also be added to the signal source to detect the error between the two transmission signals of the signal source and another signal source, and the detected error information is notified to the other signal source. The method of detecting the time error based on whether two signals are received simultaneously from the point that is the same physical distance between the two transmitters is applied to all systems that transmit time synchronization signals, and can be used to detect and correct time errors.

[0049] Figure 4 FIG. 4 is a structural diagram of a signal source and a receiver according to an embodiment of the present invention.

[0050] Reference Figure 4As an embodiment of the structure of a signal source and a structure of a receiver, the signal source includes a signal transmitter 410, two transmission lines 416 and two antennas 417, and the receiver includes an antenna 401, a transmission line 402 and a receiving terminal 400.

[0051] The signal transmitter 410 of the signal source includes: a signal generating unit 411 for generating a standard signal; a signal distributing unit 412 for dividing the standard signal into two signals and adding an identifier modulation; a memory 413 for setting and storing the identifier and the transmission time; a signal delaying unit 414 for delaying the transmission time of the two signals according to the set time of the memory 413; and two transmitting units 415 for amplifying and outputting the signal. The signal delaying unit 414 includes an error detecting unit for detecting and correcting the error based on the output signals of the two transmitting units 415. The signal transmitter 410 also includes: an antenna 421 for receiving two signals transmitted from two antennas 417; a receiving unit 422 for dividing the received signal into two signals for demodulation; and an error detecting unit 423 for comparing the two demodulated signals, detecting the transmission time error, and transmitting the correction information to the signal delaying unit 414, thereby correcting the error. In addition, the correction information transmitted from the error detector set at the point where the two signals arrive at the same time can be received and transmitted to the signal delaying unit 414 to correct the transmission time error.

[0052] The signal allocation, identifier addition, transmission time delay and transmission time correction functions can also be implemented at the software level by setting the processor.

[0053] The two transmission lines 416 are transmission cables of the same length and have the same characteristics in terms of signal delay and transmission speed, thereby eliminating transmission errors. The time difference delay of the signal can also be a delay time difference achieved by the difference in length of the two transmission cables and the difference in signal delay characteristics of the two transmission lines 416.

[0054] The receiving terminal 400 includes: a distributor that receives two signals through one antenna and distributes them to two receiving units; a signal correction unit 404 that corrects the processing errors of the two receiving units 403 and the receiver body of the demodulated signal; a comparison operation unit 405 that compares and operates the receiving time or signal phase of the two signals; and a control signal output unit 406 that outputs the comparison operation result to the flight control device. If a processor is added to the comparison operation unit to correct its own processing error at the software level, the signal correction unit 404 can also be omitted. The movement time of the two signals received by the antenna 401 and distributed to the two receiving units should be the same.

[0055] The transmission time error detector is set at a point where two signals arrive at the same time or at a position with the same physical distance from the transmission point of the two signals, and includes: a receiving unit that receives two signals through an antenna; a distributor that divides the received signal into two signals; a demodulation unit that demodulates the two distributed signals; a comparison unit that compares the two demodulated signals; and a signal transmission unit that converts the comparison result into correction information and transmits it to an external signal source. In addition, in the structure of the receiving terminal 400, the error detector can also replace the control signal output unit 406 with a signal transmission unit that converts the comparison operation result into correction information and transmits it. In all systems using synchronized time, the error detector can be used for error detection and correction of system time.

[0056] The identifier of the signal transmitted by the signal source is used to distinguish the signals transmitted from each antenna of the signal source and each signal source. The identifier is each inherent data. The modulated signal with the identifier attached can be modulated in various ways, such as analog modulation, digital modulation, pulse modulation, OFDM modulation, etc. The frequency of the signal source can also be a multi-channel frequency band or different frequencies that have little influence on each other.

[0057] Figure 4 This is only an example of a signal source that sends two signals and a receiver that receives two signals. The signal source and receiver of the present invention should not be limited to Figure 4 The structure shown.

[0058] The receiving terminal 310 can be a simple receiving circuit, which receives the guidance signal and outputs the signal as a digital logic value, and performs comparison and processing on the digital logic value. Compared with the complex calculation of GPS signals and the calculation and processing circuit of the camera that performs complex image processing, it has the advantages of simple structure, low price and fast processing.

[0059] The medium of the signal can be any medium, for example, light, electromagnetic waves or sound waves, and the path and transmission line of the signal can be vacuum, atmosphere, water, etc. and combinations thereof.

[0060] As described above, the embodiments of the present invention shown in the accompanying drawings do not limit the technical concept of the present invention. The protection scope of the present invention is limited to the matters recorded in the scope of protection claimed by the invention, and ordinary technicians in the technical field to which the present invention belongs can modify and change the technical concept of the present invention through various implementation methods. Therefore, it is obvious to ordinary technicians in the technical field to which the present invention belongs that such modifications and changes also fall within the scope of protection claimed by the present invention.

Claims

1. A route generation method for generating a route of an aircraft, characterized in that: include: Step a, sending two signals to the sky simultaneously or with a time difference to form a plane and a curved surface, so that the plane and the curved surface formed by the points where the two signals arrive at the same time are oriented in a direction perpendicular to the ground and in a direction inclined at a specified angle in the direction perpendicular to the ground; Step b, sending two signals simultaneously or with a time difference to the sky along a direction inclined at a predetermined angle in a direction perpendicular to the ground to form a plane and a curved surface, so that the plane and the curved surface formed by the points where the two signals arrive at the same time intersect with the plane and the curved surface of step a in the sky; as well as Step c, using the plane and curved surface of step a and the plane and curved surface of step b to intersect each other in the air to generate straight lines and curves parallel to the ground or inclined at an angle to the ground as routes indicating flight direction and flight altitude.

2. The route generation method according to claim 1, characterized in that: The method further includes the following step: generating a route network by generating a plurality of routes of step c that match a plurality of air routes on an air map.

3. The route generation method according to claim 1, characterized in that: The method further comprises the step of assigning identifiers to the two signals.

4. A method for generating an air corridor for an aircraft, characterized in that: The steps include: Step a, sending two signals to the sky simultaneously or with a time difference, where the two signals arrive at the same point to form a plane and a curved surface to form at least three planes and curved surfaces that are perpendicular to the ground or form an inclined angle; and In step b, a corridor parallel to or at an inclined angle to the ground is generated by the intersection of at least three planes and curved surfaces formed in step a in the air as an aerial corridor.

5. The method for generating a sky corridor according to claim 4, characterized in that: The following steps are also included: connecting the corridor starting points, corridor conversion points, corridor branch points, corridor confluence points, and corridor end points on all aviation maps through the corridors generated in step b to generate an aerial corridor network.

6. The method for generating a sky corridor according to claim 4, characterized in that: The method further includes the step of adding a corridor identifier and identifiers indicating the interior of the corridor and the exterior of the corridor to the two signals.

7. A method for correcting a transmission time error, for detecting and correcting a transmission time error of two signals of a signal source, characterized in that: When there is a reception time difference between two signals, as the two signals are received from a point where the two signals arrive at the same time, the reception time difference is determined as a transmission time error and the generated error is corrected.

8. A route position calculation method for calculating the route position of an aircraft flying on a route or air corridor, characterized in that: The steps include: In two signal sources located at the starting point and the end point of the route or air corridor, one of the two signal sources sends a positioning signal as the beginning, and the other signal source receiving the positioning signal sends a positioning signal in response thereto. If the two signal sources receive the response positioning signal of the relative signal source, the process of sending the positioning signal in response thereto is repeatedly performed; as well as As the positioning signals from the two signal sources are received, the position of the aircraft flying between the starting point and the end point of the route or air corridor is calculated based on the distance between the starting point and the end point and the reception time difference of the two positioning signals.

9. A method for generating an air corridor, for generating an air corridor including a flight path, characterized in that: An air corridor is generated by the method according to claim 4, and at least one route included in the interior of the air corridor is generated by the method according to claim 1 to include the at least one route.

10. An aircraft route navigation system, characterized in that: include: At least two signal sources, in order to form a plane and a curved surface formed by points where two signals arrive at the same time, at least two signal sources that send two signals simultaneously or with a time difference form at least two planes and curved surfaces and intersect each other in the air to generate a straight route and a curved route that are parallel to the ground or form an inclined angle with the ground; as well as The receiving terminal has a function of controlling the flight path of the aircraft in order to simultaneously receive a transmission signal for generating a route by receiving transmission signals from the at least two signal sources for generating at least one route.

11. An aircraft air corridor navigation system, characterized in that: include: At least three signal sources, in order to form a plane and a curved surface formed by points where two signals arrive at the same time, at least three signal sources are used to send two signals representing the inside and the outside of the corridor at the same time or with a time difference to form at least three planes and curved surfaces and intersect them to generate at least one sky corridor; as well as The receiving terminal receives a transmission signal from a signal source generating the sky corridor, and controls a flight path so that the aircraft flies inside the sky corridor in order to preferentially receive a signal indicating the interior of the corridor.

12. The aircraft air corridor navigation system according to claim 11, characterized in that: It also includes at least two signal sources, generating at least one route within the air corridor by the method according to claim 1, The receiving terminal further includes a function of controlling the flight path of the aircraft in order to simultaneously receive a transmission signal for generating a route by receiving transmission signals from the at least two signal sources for generating at least one route within the air corridor.

13. A transmission time error detection device, used to detect the transmission time error of two signals, characterized in that: include: A receiving unit is provided at a point where two signals arrive at the same time and at a point with the same physical distance from the transmission point of the two signals, and receives two signals through one antenna; a distributing unit divides the received signal into two signals; and a demodulating unit is used to demodulate each of the distributed signals; A comparison unit, used for comparing the two demodulated signals; as well as The signal transmission unit is used to transmit the comparison result.

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