Collision warning apparatus using FMCW(Frequency Modulation Continuous Wave) method

Abstract

A collision warning device using the FMCW method is disclosed. The collision warning device using the FMCW method includes: a radar transceiver that is installed on the rear of a user's bicycle so as to face backward, generates a Frequency Modulation Continuous Wave (FMCW) transmission signal and transmits it to the rear of the user's bicycle, and receives an FMCW reception signal that is reflected back from the rear bicycle after the transmitted FMCW transmission signal; a rear display installed on the rear of the user's bicycle so as to face backward; an LED lamp installed on the rear of the user's bicycle; a GPS device that acquires location information of the user's bicycle; a user display installed on the handlebars of the user's bicycle; and a controller that analyzes the FMCW reception signal according to a preset signal processing algorithm to determine whether there is a possibility of a collision between the rear bicycle and the user's bicycle, and if it is determined that there is a possibility of a collision between the rear bicycle and the user's bicycle, controls the rear display and the user display to output information indicating a collision risk and to light up the LED lamp.

Description

Technology Field

[0001] The present invention relates to a collision warning device using the FMCW method. Background Technology

[0002] Recently, many cyclists have been causing accidents, both large and small, on dedicated bicycle paths. The main causes of these accidents are cyclists behind failing to pay attention to the road ahead or using their mobile phones while riding. As such, due to various actions taken by cyclists behind while riding, the bicycle behind can collide with the bicycle in front. Conversely, a collision can also occur if the bicycle in front suddenly brakes without reason or suddenly moves to the side due to a problem with the situation ahead.

[0003] In such situations, it is difficult to reduce accidents because there are no devices for the bicycle in front to indicate the situation ahead or to inform the cyclist behind.

[0004] Therefore, there is an increasing need for a device that can warn bicycle riders behind of danger in advance. Prior art literature

[0005] Korean Patent Publication No. 10-1788086 (October 13, 2017) The problem to be solved

[0006] The present invention is intended to provide a collision warning device using the FMCW (Frequency Modulation Continuous Wave) method, which analyzes the possibility of a collision with a rear bicycle using a radar transceiver of the FMCW method, and if the analysis result indicates a possibility of a collision, notifies the rider of the rear bicycle of the risk of collision through a rear display installed on the rear of the bicycle, while also notifying the rider of the front bicycle of the risk of a collision with the rear bicycle through a display installed on the front of the bicycle. means of solving the problem

[0007] According to one aspect of the present invention, a collision warning device using an FMCW method installed on a user's bicycle is disclosed.

[0008] A collision warning device using an FMCW method according to an embodiment of the present invention includes: a radar transceiver that is installed at the rear of the user's bicycle so as to face backward, generates a Frequency Modulation Continuous Wave (FMCW) transmission signal and transmits it to the rear of the user's bicycle, and receives an FMCW reception signal that is reflected back from the rear bicycle after the transmitted FMCW transmission signal; a rear display installed at the rear of the user's bicycle so as to face backward; an LED lamp installed at the rear of the user's bicycle; a GPS device that acquires location information of the user's bicycle; a user display installed on the handlebars of the user's bicycle; and a controller that analyzes the FMCW reception signal according to a preset signal processing algorithm to determine whether there is a possibility of a collision between the rear bicycle and the user's bicycle, and if it is determined that there is a possibility of a collision between the rear bicycle and the user's bicycle, controls the rear display and the user display to output information indicating a collision risk and to light up the LED lamp.

[0009] The controller analyzes the FMCW received signal to detect the rear bicycle located behind the user bicycle, calculates the speed and relative distance of the rear bicycle, and calculates the speed of the user bicycle using the location information.

[0010] The controller controls the rear display and the user display to output a message indicating that the rear bicycle may collide with the user bicycle and the real-time distance between the rear bicycle and the user bicycle, and to light up the LED lamp when the speed of the rear bicycle is greater than or equal to a preset value than the speed of the user bicycle and the relative distance is less than or equal to a preset threshold.

[0011] The collision warning device further includes a tilt sensor installed on the handlebars of the user's bicycle to measure the rotation angle of the handlebars.

[0012] The controller controls the rear display and the user display to output a message indicating that the rear bicycle may collide with the user bicycle due to a sudden change of direction of the user bicycle when the rotation angle exceeds a preset threshold within a preset time, and controls the LED lamp to light up. Effects of the invention

[0013] A collision warning device using the FMCW method according to an embodiment of the present invention analyzes the possibility of a collision with a rear bicycle using a radar transceiver of the FMCW (Frequency Modulation Continuous Wave) method, and if there is a possibility of a collision as a result of the analysis, notifies the rider of the rear bicycle of the risk of collision through a rear display installed on the rear part of the bicycle, and notifies the rider of the front bicycle of the risk of collision with the rear bicycle through a display installed on the front part of the bicycle, thereby drawing the attention of the riders of the front and rear bicycles and preventing a collision between the front and rear bicycles. Brief explanation of the drawing

[0014] FIG. 1 is a diagram schematically illustrating the configuration of a collision warning device using the FMCW method according to an embodiment of the present invention. FIG. 2 is a diagram schematically illustrating a bicycle equipped with a collision warning device using the FMCW method according to an embodiment of the present invention. FIG. 3 is a diagram schematically illustrating the operation of a collision warning device using the FMCW method according to an embodiment of the present invention. Specific details for implementing the invention

[0015] As used in this specification, singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "composed" or "comprising" should not be interpreted as necessarily including all of the various components or steps described in the specification, and should be interpreted as meaning that some of the components or steps may be excluded, or that additional components or steps may be included. Furthermore, terms such as "...part," "module," etc., as used in the specification refer to a unit that processes at least one function or operation, which may be implemented in hardware or software, or a combination of hardware and software.

[0016] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings.

[0017] FIG. 1 is a schematic diagram illustrating the configuration of a collision warning device using the FMCW method according to an embodiment of the present invention, FIG. 2 is a schematic diagram illustrating a bicycle equipped with a collision warning device using the FMCW method according to an embodiment of the present invention, and FIG. 3 is a schematic diagram illustrating the operation of a collision warning device using the FMCW method according to an embodiment of the present invention. Hereinafter, a collision warning device using the FMCW method according to an embodiment of the present invention will be described with reference to FIG. 1, and FIG. 2 and FIG. 3.

[0018] Referring to FIG. 1, a collision warning device using the FMCW method according to an embodiment of the present invention may be configured to include a radar transceiver (100), a rear display (200), an LED lamp (300), a GPS device (400), a tilt sensor (500), a user display (600), and a controller (700).

[0019] A radar transceiver (100) is installed at the rear of a user's bicycle (10) so as to face backward, and generates a Frequency Modulation Continuous Wave (FMCW) transmission signal to be transmitted to the rear of the user's bicycle (10), and receives an FMCW reception signal that is reflected back from the rear bicycle (20) by the transmitted FMCW transmission signal.

[0020] For example, referring to FIG. 2, the radar transceiver (100) is installed so as to face backward on the saddle portion of the user's bicycle (10) to scan the rear of the user's bicycle (10).

[0021] For example, the radar transceiver (100) can generate an FMCW transmission signal and a carrier wave, and transmit the generated FMCW transmission signal by carrying it on the carrier wave through a transmitting antenna. Subsequently, the radar transceiver (100) can receive the FMCW reception signal, which is reflected from the rear bicycle (20) and returned with a time delay, through a receiving antenna, multiply the FMCW transmission signal and the FMCW reception signal and pass them through a low-pass filter to generate a beat frequency with the sum and difference of the frequencies of the two signals as the frequency, and convert the generated beat frequency into a digital signal.

[0022] The rear display (200) is installed on the rear of the user's bicycle (10) so that the screen faces backward, and when there is a possibility that the rear bicycle (20) may collide with the user's bicycle (10) according to the control of the controller (700) to be described later, it outputs information indicating the collision risk so that the rider of the rear bicycle (20) can recognize it.

[0023] For example, the rear display (200) is installed on the saddle portion of the user bicycle (10) so that the screen faces backward as shown in FIG. 2, and can output a message indicating that the rear bicycle (20) may collide with the user bicycle (10) and the real-time distance between the rear bicycle (20) and the user bicycle (10) while flashing red.

[0024] Additionally, the rear display (200) may output a message flashing in red indicating that the rear bicycle (20) may collide with the user bicycle (10) due to a sudden change in direction of the user bicycle (10).

[0025] An LED lamp (300) is installed on the rear of the user's bicycle (10) and is illuminated to alert the rider of the rear bicycle (20) of the collision risk so that the rider can recognize it when there is a possibility that the rear bicycle (20) may collide with the user's bicycle (10) under the control of a controller (700) to be described later.

[0026] For example, an LED lamp (300) can be installed on the rear frame of a user's bicycle (10) as shown in FIG. 2 and can flash quickly after being lit.

[0027] A GPS device (400) is installed on the front of the user's bicycle (10) and obtains location information of the user's bicycle (10).

[0028] A tilt sensor (500) is installed on the handlebars of the user's bicycle (10) to measure the rotation angle of the handlebars.

[0029] The user display (600) is installed on the handlebars of the user bicycle (10) so that the rider of the user bicycle (10) can see it, and, in the same way as the rear display (200), if there is a possibility that the rear bicycle (20) will collide with the user bicycle (10) under the control of the controller (700) described later, it outputs information indicating the collision risk so that the rider of the rear bicycle (20) can recognize it.

[0030] The controller (700) basically controls the overall operation of the collision warning device using the FMCW method.

[0031] In particular, the controller (700) analyzes the FMCW received signal transmitted from the radar transceiver (100) according to a preset signal processing algorithm to determine whether there is a possibility of a collision between the rear bicycle (20) and the user bicycle (10). If it is determined that there is a possibility of a collision between the rear bicycle (20) and the user bicycle (10), as shown in FIG. 3, the controller controls the rear display (200) and the user display (600) to output information indicating the risk of a collision and to light up the LED lamp (300).

[0032] That is, the controller (700) can analyze the FMCW received signal to detect the rear bicycle (20) located behind the user bicycle (10) and calculate the speed and relative distance of the detected rear bicycle (20). The controller (700) can also calculate the speed of the user bicycle (10) using location information obtained by the GPS device (400). Furthermore, if the speed of the rear bicycle (20) is greater than the speed of the user bicycle (10) by a preset value (e.g., 1.5 times or more) and the relative distance is below a preset threshold (e.g., 2m or less), the controller (700) can control the rear display (200) and the user display (600) to output a message indicating that the rear bicycle (20) may collide with the user bicycle (10) and the real-time distance between the rear bicycle (20) and the user bicycle (10) by flashing red, and the LED lamp (300) to light up.

[0033] Additionally, the controller (700) can control the rear display (200) and user display (600) to flash a message in red and light up the LED lamp (300) when the rotation angle of the handle measured by the tilt sensor (500) exceeds a preset threshold within a preset time, indicating that the rear bicycle (20) may collide with the user bicycle (10) due to a sudden change in direction of the user bicycle (10).

[0034] The embodiments of the present invention described above are disclosed for illustrative purposes only, and those skilled in the art with ordinary knowledge of the present invention may make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions should be considered to fall within the scope of the following claims. Explanation of the symbols

[0035] 10: User's bicycle 20: Rear bicycle 100: Radar transceiver 200: Rear display 300: LED lamp 400: GPS device 500: Tilt sensor 600: User Display 700: Controller

Claims

Claim 1 A collision warning device using an FMCW method installed on a user's bicycle comprises: a radar transceiver installed on the rear of the user's bicycle so as to face backward, which generates an FMCW (Frequency Modulation Continuous Wave) transmission signal and transmits it to the rear of the user's bicycle, and receives an FMCW reception signal that is reflected back from the rear bicycle after the transmitted FMCW transmission signal; a rear display installed on the rear of the user's bicycle so as to face backward; an LED lamp installed on the rear of the user's bicycle; a GPS device for acquiring location information of the user's bicycle; a user display installed on the handlebars of the user's bicycle; and a tilt sensor installed on the handlebars of the user's bicycle to measure the rotation angle of the handlebars.The controller includes a controller that analyzes the FMCW received signal according to a preset signal processing algorithm to determine whether there is a possibility of collision between the rear bicycle and the user bicycle, and if it is determined that there is a possibility of collision between the rear bicycle and the user bicycle, the rear display and the user display output information indicating a collision risk and control the LED lamp to light up. The controller analyzes the FMCW received signal to detect the rear bicycle located behind the user bicycle, calculates the speed and relative distance of the rear bicycle, calculates the speed of the user bicycle using the location information, and if the speed of the rear bicycle is greater than or equal to a preset value than the speed of the user bicycle and the relative distance is less than or equal to a preset threshold, the rear display and the user display output a message indicating that the rear bicycle may collide with the user bicycle and the real-time distance between the rear bicycle and the user bicycle, and controls the LED lamp to light up. If the rotation angle exceeds a preset threshold within a preset time, the rear display and the user display indicate that the rear bicycle may collide with the user bicycle due to a sudden change of direction of the user bicycle. A collision warning device using an FMCW method characterized by outputting a message and controlling the LED lamp to light up. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete

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