KR20050076275A - Optimum sensitivity tracking method for satellite antenna - Google Patents

Abstract

An optimal sensitivity tracking method of a satellite antenna for automatically tracking elevation and azimuth angles of a satellite having an optimum sensitivity in a short time is disclosed. According to the present invention, there is provided a method for tracking an optimal sensitivity of a satellite antenna, comprising: (a) aligning an elevation angle and an azimuth angle of a satellite antenna to an initial position, and (b) measuring satellite sensitivity at an initial position aligned in step (a). Storing as a value of 1, (c) adjusting the elevation angle by a predetermined angle, (d) measuring the satellite sensitivity while adjusting the azimuth angle after adjusting the elevation angle, and storing it as a second value, and (e) Determining whether the difference value obtained by subtracting the second value from the value is greater than a predetermined threshold value; and (f) if it is determined in step (e) that the difference value is not greater than the predetermined threshold value, the sensitivity is increased while raising the elevation angle. Performing azimuth tracking of (g), (g) measuring fine azimuth adjustment and sensitivity if it is determined that the difference is greater than a predetermined threshold in step (e), and (h) in step (g) Optimal room with the best measured sensitivity Determining and storing the elevation angle, (i) measuring the fine elevation adjustment and sensitivity within the optimum azimuth range determined in step (h), (j) determining and storing the optimum elevation angle, and (k ) Measuring the sensitivity at an optimum azimuth and elevation angle and storing the sensitivity as an optimum sensitivity, (l) determining whether a difference obtained by subtracting the optimum sensitivity from the first value is greater than a predetermined threshold value, and (m) at the first value If it is determined that the difference obtained by subtracting the optimum sensitivity is not greater than a predetermined threshold value, the method includes moving to step (d).

According to the present invention, the satellite is automatically placed at the optimum azimuth and elevation angle at the position of the satellite by using a threshold. The automatic satellite tracking method using the above threshold value does not examine the strength of the satellite signal at all elevation angles and all azimuth angles. If a signal is larger than the threshold determined, the satellite is considered to be present and all the azimuth angles are no longer present. Without searching satellites at elevation angles, we find the best signal within the threshold.

In addition, the method according to the present invention as described above, even if the user inadvertently touched the satellite antenna to move away from the optimum elevation and azimuth angle automatically has the advantage that the after-service is significantly reduced because the optimum tracking angle and azimuth of the antenna .

Description

Optimum sensitivity tracking method for satellite antenna

The present invention relates to a method for tracking an optimum sensitivity of a satellite antenna, and more particularly, to an optimum sensitivity of a satellite antenna for tracking an elevation angle and an azimuth angle of a satellite having an optimum sensitivity within a short time without checking the satellite sensitivity at all elevation angles and azimuth angles. It is about a tracking method.

3 is a view for explaining the concept of elevation and azimuth. Referring to FIG. 3, the angle viewed by the antenna 32 toward the sky where the satellites 30 are located is referred to as elevation. That is, when observing another point P at a certain point A, when the gaze AP is above the horizontal plane, the angle formed by the AP with the horizontal plane is called the raised angle of the point P.

 In addition, azimuth refers to the angle formed by the plane of the crew passing through the object and the ceiling from the observation point where the antenna 32 is located, and the azimuth is a horizontal line with respect to the north point on the meridian. Is generally measured with altitude to indicate the position of the object in the horizontal coordinates.

In antenna automatic positioning technology, adjusting the elevation angle and azimuth angle to the object to be tracked using the antenna is the most important item in the automatic positioning antenna.

Conventional fixed satellite antenna takes a lot of installation time because the installation technician must match the optimum elevation angle and azimuth angle when installing the antenna. In addition, such fixed satellite antennas are frequently damaged after the user inadvertently touches the antenna or by changing the direction of the antenna due to rain or wind, causing the installation technician to visit the installation site. There is a problem.

The technical problem to be achieved by the present invention is to provide an optimal sensitivity tracking method of a satellite antenna that automatically tracks the elevation angle and azimuth of a satellite having an optimum sensitivity within a short time without checking the satellite sensitivity at all elevation angles and azimuth angles.

Optimum sensitivity tracking method of the satellite antenna according to the present invention for achieving the above technical problem,

A method of controlling the direction of a satellite antenna to be placed at an azimuth and elevation angle having an optimal reception sensitivity,

(a) aligning the elevation angle and azimuth angle of the satellite antenna to an initial position;

(b) measuring satellite sensitivity at an initial position aligned in step (a) and storing it as a first value;

(c) adjusting the elevation angle by a predetermined angle;

(d) measuring and storing the satellite sensitivity as a second value while adjusting the azimuth after adjusting the elevation angle;

(e) determining whether a difference value obtained by subtracting the second value from the first value is greater than a predetermined threshold value;

(f) performing azimuth tracking of optimal sensitivity while raising the elevation angle when it is determined in step (e) that the difference value is not greater than a predetermined threshold value;

(g) measuring fine azimuth adjustment and sensitivity if it is determined in step (e) that the difference is greater than a predetermined threshold;

(h) determining and storing the optimum azimuth angle with the highest sensitivity measured in step (g);

(i) measuring fine elevation angle adjustment and sensitivity within an optimum azimuth range determined in step (h);

(j) determining and storing an optimal elevation angle;

(k) measuring the sensitivity at the optimum azimuth and elevation angles and storing at the optimum sensitivity;

(l) determining whether the difference obtained by subtracting the optimum sensitivity from the first value is greater than a predetermined threshold; And

(m) if it is determined that the difference obtained by subtracting the optimum sensitivity from the first value is not greater than a predetermined threshold, moving to step (d).

In addition, the step (a),

(a-1) identifying whether the limit switch of the elevation control shaft has been activated when the power is turned on;

(a-2) lowering the elevation angle until the limit switch is activated; And

(a-3) if the limit switch is operated, azimuth reverse rotation of the azimuth angle until the start switch of the azimuth adjustment shaft is activated;

In addition, the step (g),

(g-1) adjusting the elevation angle in the direction of increasing sensitivity if the difference is greater than a predetermined threshold in step (e) and continuing until the sensitivity is decreased; And

(g-2) fine azimuth adjustment and measuring the sensitivity; preferably.

In addition, the step (f),

(f-1) azimuth forward rotation if it is determined in step (e) that the difference is not greater than a predetermined threshold;

(f-2) measuring satellite sensitivity and storing it as a third value;

(f-3) identifying whether a difference between the first value and the third value is greater than a predetermined threshold;

(f-4) branching to step (i) if the difference between the first value and the third value is identified as being greater than a predetermined threshold;

(f-5) identifying whether the termination switch of the azimuth adjustment shaft is operated if the difference between the first value and the third value is identified as not greater than a predetermined threshold value;

(f-6) if the termination switch is identified as activated, elevating the elevation angle and rotating the antenna azimuth backwards;

(f-7) if the termination switch is identified as inoperable, identifying whether the initiating switch is in operation;

(f-8) if the start switch is identified as actuated, elevating the elevation and rotating the antenna azimuth forward; And

and (f-9) repeating the steps (f-1) to (f-8) until the condition of the step (f-3) is satisfied.

In addition, the step (g),

(g-1) setting an azimuth forward or reverse rotation angle based on the difference value; And

(g-2) measuring satellite sensitivity while adjusting the azimuth by the set rotation angle;

(H) step,

(h ') searching for the satellite sensitivity measured in the step (g-2) and determining and storing an azimuth angle having an optimal reception sensitivity.

In addition, the method,

If the difference between the checked reception sensitivity and the first value is smaller than the threshold value by checking the satellite reception sensitivity every predetermined time, it is preferable to perform the process after step (c) again to adjust the azimuth and elevation angles.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart illustrating main steps of an optimal sensitivity tracking method of a satellite antenna according to a preferred embodiment of the present invention. Referring to FIG. 1, in the optimal sensitivity tracking method of the satellite antenna according to the preferred embodiment of the present invention, the elevation angle and azimuth angle of the satellite antenna are first aligned to an initial position (step 102), and the initial alignment aligned in the step 102 is performed. The satellite sensitivity at the location is measured (step 104) and stored as a first value (A). Next, after adjusting the elevation angle by a predetermined angle, satellite sensitivity is measured (step 106) while adjusting the azimuth angle and stored as a second value. Now, it is determined whether the difference value obtained by subtracting the second value B from the first value A is greater than the predetermined threshold (step 108). If it is determined in step 108 that the difference value is not greater than the predetermined threshold value, the azimuth tracking of the optimum sensitivity is performed while raising the elevation angle (step 110), and in step 108, the difference value is the predetermined threshold value. If determined to be greater than the value, fine azimuth adjustment and sensitivity are measured (step 112).

Next, the optimum azimuth angle having the best sensitivity measured in step 112 is determined and stored (step 114). Further, fine elevation adjustment and sensitivity are measured (step 116) within the optimum azimuth range determined in step 114, and the optimum elevation angle is determined and stored (step 118).

Next, the sensitivity is measured at the optimum azimuth and elevation angles determined in the steps 114 and 118, respectively, and stored as the optimum sensitivity B1 (step 120), and then at the first value A, the optimum sensitivity B1. It is determined whether the difference minus) is greater than the predetermined threshold (step 180).

If it is determined that the difference obtained by subtracting the optimum sensitivity B1 from the first value A is not greater than a predetermined threshold, the flow proceeds to step 106.

2A, 2B and 2C show the method of FIG. 1 in more detail.

Referring to FIG. 2A, step 102 includes the following detailed processes. When the power is turned on (step 202_1), it is identified whether the limit switch of the elevation control shaft is activated (step 202_2), and the elevation angle is lowered (step 202_3) until the limit switch is operated. On the other hand, if the limit switch is operated, the azimuth reverse rotation (step 202_4) is performed until the start switch of the azimuth adjustment shaft is activated while identifying whether the start switch is activated (step 202_5).

Next, the initial satellite sensitivity is measured (204_1) and stored as the first value (A), and the elevation angle is raised to an initially set value (step 206_1), and the satellite sensitivity is measured and stored as the second value (B). For example, the elevation angle of Mugunghwa No. 3 satellite, which can be viewed in Korea, is about 46 °.

Next, it is identified whether the difference obtained by subtracting the second value B from the first value A is greater than the predetermined threshold, and the difference obtained by subtracting the second value B from the first value A is the predetermined threshold. If it is not greater than the value, it branches to step A shown in FIG. 2B, and if the difference obtained by subtracting the second value B from the first value A is not greater than a predetermined threshold, it branches to step C shown in FIG. 2C. do.

First, referring to FIG. 2B, when the difference obtained by subtracting the second value B from the first value A is not greater than a predetermined threshold value, satellite sensitivity is measured while azimuth forward rotation (step 210_1). 210_2) to store as a third value B. Next, by identifying whether the difference between the first value A and the third value B is greater than the predetermined threshold, the difference between the first value A and the third value B is greater than the predetermined threshold. If identified as large, branch to step C of FIG. 2A.

On the other hand, if it is identified that the difference between the first value A and the third value B is not greater than a predetermined threshold value, it is identified whether the termination switch of the azimuth adjustment shaft is operated (step 210_4), and the termination switch is operated. Once identified, elevation is raised by a predetermined value (step 210_5) and the antenna is rotated azimuth in reverse direction (step 210_6). The rotation range of the azimuth adjustment shaft is controlled within the range of 0 ° to 370 °.

On the other hand, if the termination switch is identified as not working, the operation is identified whether the starting switch has been operated (step 210_7), and if the starting switch is identified as having been activated, the elevation angle is increased by a predetermined value (step 210_8) and the antenna is azimuth forward rotated (step 210_9). ) If the start switch is identified as inoperative, continue azimuth forward or reverse rotation (step 210_10). The steps 210_2 to 210_10 are repeated until the condition of the step 210_3 is satisfied.

Referring to FIG. 2C, after branching to step B, an azimuth forward or reverse rotation angle is set (step 212), preferably an azimuth forward or reverse rotation angle is set based on the difference value. That is, it is preferable to set the rotation angle large when the difference value is large, and to set the rotation angle small when the difference value is small. Next, the satellite sensitivity is measured by adjusting the azimuth by the set rotation angle (step 214) to store the optimum azimuth with the highest reception sensitivity (step 216), and then rotate the azimuth forward or weak direction (step 218). After raising or lowering the elevation angle at the set angle (step 220), the satellite sensitivity is measured (step 222) to store the optimal elevation angle having the highest reception sensitivity (step 224). Next, at the optimum azimuth forward or reverse rotation (step 226) at the optimum angle, the sensitivity is measured (step 228) and stored as the optimal sensitivity B1. Next, it is determined whether the difference obtained by subtracting the optimum sensitivity B1 from the first value A is greater than the predetermined threshold (step 230), and the difference obtained by subtracting the optimum sensitivity B1 from the first value A is predetermined. If the state continues to be larger than the threshold, the current state is maintained. However, if it is determined that the difference obtained by subtracting the optimum sensitivity B1 from the first value A is not greater than a predetermined threshold, the flow moves to step D.

According to the above method, the automatic positioning of the automatic positioning antenna uses a threshold to automatically position the satellite antenna at the optimum azimuth and elevation angles. The automatic satellite tracking method using the above threshold value does not examine the strength of the satellite signal at all elevation angles and all azimuth angles. If a signal is larger than the threshold determined, the satellite is considered to be present and all the azimuth angles are no longer present. Without searching satellites at elevation angles, we find the best signal within the threshold.

In addition, according to the method according to the present invention, even after the user inadvertently touched the satellite antenna or rain or wind, the optimum elevation and azimuth of the antenna automatically tracks the elevation angle and azimuth angle, so that the after-sales service The advantage is that it is significantly reduced.

The optimal sensitivity tracking method of the satellite antenna according to the present invention as described above may be prepared by a computer program. Program code and code segments constituting the computer program can be easily inferred by a programmer in the art. The computer program is read and executed by a microcomputer to perform the optimal sensitivity tracking method of the satellite antenna according to the present invention. In addition, the computer program may be stored in semiconductor memories such as ROM, EPROM, EEPROM, and flash memory, and may be downloaded via the Internet and other communication lines.

The above embodiments are illustrative for the purpose of understanding the present invention and various modifications and variations are possible within the scope of the invention as defined by the appended claims. Therefore, the scope of rights of the optimal sensitivity tracking method of the satellite antenna according to the present invention is not limited to the above embodiment.

As described above, according to the present invention, the satellite antenna is automatically placed at the optimum azimuth and elevation angles at the position of the satellite by using a threshold. The automatic satellite tracking method using the above threshold value does not examine the strength of the satellite signal at all elevation angles and all azimuth angles. If a signal is larger than the threshold determined, the satellite is considered to be present and all the azimuth angles are no longer present. Without searching satellites at elevation angles, we find the best signal within the threshold.

In addition, according to the method according to the present invention, even after the user inadvertently touched the satellite antenna or rain or wind, the optimum elevation and azimuth of the antenna automatically tracks the elevation angle and azimuth angle, so that the after-sales service The advantage is that it is significantly reduced.

1 is a flow chart showing the main steps of a method for tracking optimal sensitivity of a satellite antenna according to a preferred embodiment of the present invention.

2A, 2B, and 2C are flow charts illustrating the method of FIG. 1 in more detail.

3 is a view for explaining the concept of elevation and azimuth.

Claims (6)

A method of controlling the direction of a satellite antenna to be placed at an azimuth and elevation angle having an optimal reception sensitivity, (a) aligning the elevation angle and azimuth angle of the satellite antenna to an initial position; (b) measuring satellite sensitivity at an initial position aligned in step (a) and storing it as a first value; (c) adjusting the elevation angle by a predetermined angle; (d) measuring and storing the satellite sensitivity as a second value while adjusting the azimuth after adjusting the elevation angle; (e) determining whether a difference value obtained by subtracting the second value from the first value is greater than a predetermined threshold value; (f) performing azimuth tracking of optimal sensitivity while raising the elevation angle when it is determined in step (e) that the difference value is not greater than a predetermined threshold value; (g) measuring fine azimuth adjustment and sensitivity if it is determined in step (e) that the difference is greater than a predetermined threshold; (h) determining and storing the optimum azimuth angle with the highest sensitivity measured in step (g); (i) measuring fine elevation angle adjustment and sensitivity within an optimum azimuth range determined in step (h); (j) determining and storing an optimal elevation angle; (k) measuring the sensitivity at the optimum azimuth and elevation angles and storing at the optimum sensitivity; (l) determining whether the difference obtained by subtracting the optimum sensitivity from the first value is greater than a predetermined threshold; And and (m) moving to the step (d) if it is determined that the difference obtained by subtracting the optimum sensitivity from the first value is not greater than a predetermined threshold. According to claim 1, wherein the step (a), (a-1) identifying whether the limit switch of the elevation control shaft has been activated when the power is turned on; (a-2) lowering the elevation angle until the limit switch is activated; And (a-3) if the limit switch is operated, azimuth reverse rotation of the azimuth angle until the start switch of the azimuth adjustment shaft is operated; and the optimal sensitivity tracking method of a satellite antenna comprising a. The method of claim 1, wherein step (g) (g-1) adjusting the elevation angle in the direction of increasing sensitivity if the difference is greater than a predetermined threshold in step (e) and continuing until the sensitivity is decreased; And (g-2) fine azimuth adjustment and measuring sensitivity; and a method for optimal sensitivity tracking of a satellite antenna comprising a. The method of claim 1, wherein step (f) comprises: (f-1) azimuth forward rotation if it is determined in step (e) that the difference is not greater than a predetermined threshold; (f-2) measuring satellite sensitivity and storing it as a third value; (f-3) identifying whether a difference between the first value and the third value is greater than a predetermined threshold; (f-4) branching to step (i) if the difference between the first value and the third value is identified as being greater than a predetermined threshold; (f-5) identifying whether the termination switch of the azimuth adjustment shaft is operated if the difference between the first value and the third value is identified as not greater than a predetermined threshold value; (f-6) if the termination switch is identified as activated, elevating the elevation angle and rotating the antenna azimuth backwards; (f-7) if the termination switch is identified as inoperable, identifying whether the initiating switch is in operation; (f-8) if the start switch is identified as actuated, elevating the elevation and rotating the antenna azimuth forward; And (f-9) repeating the steps (f-1) to (f-8) until the condition of the step (f-3) is satisfied; optimal sensitivity of the satellite antenna comprising a Tracking method. The method of claim 1 or 3, wherein step (g) (g-1) setting an azimuth forward or reverse rotation angle based on the difference value; And (g-2) measuring satellite sensitivity while adjusting the azimuth by the set rotation angle; (H) step, (h ') determining and storing the azimuth angle of which reception sensitivity is optimal by searching for the satellite sensitivity measured in step (g-2). The method of claim 1, If the difference between the checked reception sensitivity and the first value is less than the threshold value every predetermined time by checking the satellite reception sensitivity, the process after step (c) is repeated to adjust the azimuth and elevation angles. Optimal sensitivity tracking method.