KR-102964221-B1 - METHOD AND DEVICE FOR CORRECTING FREQUENCY BAND

KR102964221B1KR 102964221 B1KR102964221 B1KR 102964221B1KR-102964221-B1

Abstract

The present invention relates to a frequency band correction method. The frequency band correction method comprises the steps of: receiving a channel change request from a first channel having a first frequency to a second channel having a second frequency; upon receiving the channel change request, rotating a motor to change the first frequency of a variable bandpass filter to a third frequency of the correction channel; correcting a deviation in the frequency band caused by the rotation of the motor at the third frequency; and, after the deviation in the frequency band is corrected, rotating the motor to change the third frequency of the variable bandpass filter to a second frequency of the second channel.

Inventors

강성민

Assignees

한국공항공사

Dates

Publication Date: 20260513
Application Date: 20241113

Claims (17)

A frequency band correction method performed by at least one processor, A step of receiving a request to change channels from a first channel having a first frequency to a second channel having a second frequency; When the above channel change request is received, a step of rotating a motor to change the first frequency of a variable bandpass filter to the third frequency of a correction channel; A step of correcting the deviation of the frequency band caused by the rotation of the motor at the third frequency; and After the deviation of the above frequency band is corrected, a step of rotating the motor to change the third frequency of the variable bandpass filter to the second frequency of the second channel; Includes, The step of correcting the deviation of the frequency band caused by the rotation of the motor at the third frequency is, A step of inputting a first signal onto the variable bandpass filter at the third frequency to detect a first magnitude of the first signal; A step of inputting a second signal onto the variable bandpass filter at the third frequency to detect a second magnitude of the second signal; A step of calculating the difference between the first magnitude of the first signal and the second magnitude of the second signal; and A step of correcting the deviation of the frequency band so that the difference between the first magnitude of the first signal calculated above and the second magnitude of the second signal above becomes less than or equal to a threshold; A frequency band correction method including
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In paragraph 1, The step of correcting the deviation of the frequency band so that the difference between the first magnitude of the first signal and the second magnitude of the second signal is less than or equal to a threshold is A step of determining whether the difference between the first magnitude of the first signal and the second magnitude of the second signal is greater than or equal to a threshold; and If it is determined that the difference between the first magnitude of the first signal and the second magnitude of the second signal is greater than or equal to a threshold, a step of rotating the motor by a first rotation amount to recalculate the difference between the first magnitude of the first signal and the second magnitude of the second signal; A frequency band correction method including
In paragraph 1, A frequency band correction method in which the first signal is a signal that is higher by a certain magnitude at the third frequency, and the second signal is a signal that is lower by a certain magnitude at the third frequency.
In paragraph 1, The step of rotating the motor to change the third frequency of the variable bandpass filter to the second frequency of the second channel is, A step of rotating the motor to change the third frequency of the variable bandpass filter to the second frequency of the second channel; and A step of correcting the deviation of the frequency band caused by the rotation of the motor at the second frequency; A frequency band correction method including
In paragraph 5, The step of rotating the motor to change the third frequency of the variable bandpass filter to the second frequency of the second channel is, The step of rotating the motor at a first rotational speed up to a first point associated with the second frequency; and A step of reducing the first rotational speed of the motor from the first point to the second point to change the third frequency of the variable bandpass filter to the second frequency of the second channel; A frequency band correction method including
In paragraph 5, The step of correcting the deviation of the frequency band caused by the rotation of the motor at the second frequency is, A step of inputting a third signal onto the variable bandpass filter at the second frequency to detect a third magnitude of the third signal; A step of inputting a fourth signal onto the variable bandpass filter at the second frequency to detect a fourth magnitude of the fourth signal; A step of calculating the difference between the third magnitude of the third signal and the fourth magnitude of the fourth signal; and A step of correcting the deviation of the frequency band so that the difference between the third magnitude of the third signal calculated above and the fourth magnitude of the fourth signal above is less than or equal to a threshold; A frequency band correction method including
In paragraph 1, The step of receiving a request to change channels from a first channel having the first frequency to a second channel having the second frequency is: A step of generating the channel change request in response to receiving user input requesting a channel change to a second channel based on a user interface; A frequency band correction method including
A computer program stored on a computer-readable recording medium for executing a method according to any one of paragraphs 1, 3 through 8 on a computer.
As a computing device, Communication module; Memory; and At least one processor connected to the memory and configured to execute at least one computer-readable program contained in the memory. Includes, The above at least one program is, Receives a request to change channels from a first channel having a first frequency to a second channel having a second frequency, and When the above channel change request is received, the motor is rotated to change the first frequency of the variable bandpass filter to the third frequency of the correction channel, and Correcting the deviation in the frequency band caused by the rotation of the motor at the above third frequency, and After the deviation of the above frequency band is corrected, the motor is rotated to change the third frequency of the variable bandpass filter to the second frequency of the second channel, and includes instructions for this purpose. The above at least one program is, A first signal is input onto the variable bandpass filter at the third frequency to detect a first magnitude of the first signal, and A second signal is input onto the variable bandpass filter at the third frequency to detect the second magnitude of the second signal, and Calculate the difference between the first magnitude of the first signal and the second magnitude of the second signal, and A computing device further comprising instructions for correcting deviations in the frequency band such that the difference between the first magnitude of the first signal calculated above and the second magnitude of the second signal above is less than or equal to a threshold.
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In Paragraph 10, The above at least one program is, Determining whether the difference between the first magnitude of the first signal and the second magnitude of the second signal is greater than or equal to a threshold, A computing device further comprising instructions for recalculating the difference between the first magnitude of the first signal and the second magnitude of the second signal by rotating the motor by a first amount of rotation when it is determined that the difference between the first magnitude of the first signal and the second magnitude of the second signal is greater than or equal to a threshold.
In Paragraph 10, A computing device in which the first signal is a signal that is higher by a certain magnitude at the third frequency, and the second signal is a signal that is lower by the certain magnitude at the third frequency.
In Paragraph 10, The above at least one program is, The above motor is rotated to change the third frequency of the variable bandpass filter to the second frequency of the second channel, and A computing device further comprising instructions for correcting a deviation in the frequency band caused by the rotation of the motor at the second frequency.
In Paragraph 14, The above at least one program is, The motor is rotated at a first rotational speed up to a first point associated with the second frequency, and A computing device further comprising instructions for reducing the first rotational speed of the motor from the first point to the second point to change the third frequency of the variable bandpass filter to the second frequency of the second channel.
In Paragraph 14, The above at least one program is, A third signal is input onto the variable bandpass filter at the second frequency to detect the third magnitude of the third signal, and A fourth signal is input onto the variable bandpass filter at the second frequency to detect the fourth magnitude of the fourth signal, and Calculate the difference between the third magnitude of the third signal and the fourth magnitude of the fourth signal, and A computing device further comprising instructions for correcting deviations in the frequency band such that the difference between the third magnitude of the third signal calculated above and the fourth magnitude of the fourth signal above is less than or equal to a threshold.
In Paragraph 10, The above at least one program is, A computing device further comprising instructions for generating a channel change request in response to receiving user input requesting a channel change to a second channel based on a user interface.

Description

Method and Device for Correcting Frequency Band The present invention relates to a frequency band correction method and apparatus, and specifically, to a frequency band correction method and apparatus for compensating for mechanical tolerances of a motor. It is important to provide bearing and distance information to aircraft for safe flight at airports. To provide such bearing and distance information, systems such as TACAN (tactical air navigation) and DME (distance measuring equipment) are used. Meanwhile, in the case of these TACAN and DME systems, variable bandpass filters are generally used as receiving filters. In a variable bandpass filter, a motor is driven by an electrical signal, and the motor's rotational motion is converted into up-and-down, left-and-right, or other rotational movements to change the resonant frequency of the cavity resonator. The changed resonant frequency then alters the filter's frequency passband. When the resonant frequency and frequency passband are changed in this manner, mechanical tolerances may occur due to the motor's rotation. Since these mechanical tolerances can be directly reflected in the overall filter characteristics, there is a problem of reduced precision in the receiving filter. Embodiments of the present invention will be described with reference to the accompanying drawings described below, wherein similar reference numerals indicate similar elements, but are not limited thereto. FIG. 1 is a block diagram showing the internal configuration of a variable bandpass filter according to one embodiment of the present invention. FIG. 2 is a functional block diagram showing the internal configuration of a computing device according to one embodiment of the present invention. FIG. 3 is an exemplary drawing visualizing a user interface according to one embodiment of the present invention. FIG. 4 is an exemplary graph showing channel movement to a correction channel and a second channel according to one embodiment of the present invention. FIG. 5 is a graph visualizing the process of correcting the deviation of the frequency band in a correction channel according to one embodiment of the present invention. FIG. 6 is a graph visualizing the process of changing the channel from a correction channel to a second channel according to one embodiment of the present invention. FIG. 7 is a graph visualizing the process of correcting the deviation of the frequency band in the second channel according to one embodiment of the present invention. FIG. 8 is a flowchart illustrating an example of a frequency band correction method according to one embodiment of the present invention. FIG. 9 is a block diagram showing the hardware configuration of a computing device according to one embodiment of the present invention. Hereinafter, specific details for implementing the present invention will be described in detail with reference to the attached drawings. However, in the following description, specific descriptions regarding widely known functions or configurations will be omitted if there is a risk of unnecessarily obscuring the essence of the present invention. In the attached drawings, identical or corresponding components are assigned the same reference numerals. Additionally, in the description of the following embodiments, the description of identical or corresponding components may be omitted. However, even if a description of a component is omitted, it is not intended that such component is not included in any embodiment. The advantages and features of the disclosed embodiments and the methods for achieving them will become clear by referring to the embodiments described below in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms, and these embodiments are provided merely to make the present invention complete and to fully inform those skilled in the art of the scope of the invention. The terms used in this specification will be briefly explained, and the disclosed embodiments will be described in detail. The terms used in this specification have been selected to be as generally used as possible, taking into account their functions in the present invention; however, these terms may vary depending on the intent of those skilled in the relevant field, case law, the emergence of new technologies, etc. Additionally, in specific cases, terms may be arbitrarily selected by the applicant, and in such cases, their meanings will be described in detail in the relevant description of the invention. Therefore, the terms used in this invention should be defined not merely by their names, but based on their meanings and the overall content of the present invention. In this specification, singular expressions include plural expressions unless the context clearly specifies them as singular. Additionally, plural expressions include singular expressions unless the contex