KR920000061B1 - Compensating method of parabolic antenna in satellite tracing - Google Patents

Abstract

The method compensates the position error of paravola antenna caused by physical factors or inertia of the antenna. The method comprises the steps: (A) storing actual position and moving the antenna to the east end position when the east end position of limit range is set; (B) replacing the position data in an actual position buffer by reference position; (C) driving the antenna till the actual position reaches the reference position; and (D) stopping the antenna, displaying the position compensation data on a screen and then returning to a normal mode. The tracking of the antenna to a satellite is done by simple remote controller operation and the process is monitored through a screen.

Description

Position Compensation Method of Parabolic Antenna in Satellite Tracking

1 is a system block diagram to which the present invention is applied.

2 is a control flowchart of the initial antenna installation.

3 is an antenna position adjustment diagram.

4 is a flowchart illustrating an antenna driving range limitation.

5 is a flow chart of the present invention.

6 is a predetermined antenna according to the present invention.

* Explanation of symbols for the main parts of the drawings

10: micom 20: OSD synthesis unit

30: memory 40: motor control unit

50: actuator 60: antenna

70: satellite

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for compensating antenna position in an antenna driven satellite broadcasting receiver, and more particularly, to a method for compensating for relative distortion of a parabolic antenna due to external physical factors and inertia.

In general, in order to remember and track several satellites floating over the equator in an antenna driven satellite broadcasting receiver, the position of the antenna must be stored with each satellite.

Therefore, in the antenna-driven satellite broadcasting receiver, the actuator can be driven by program control to move the parabola antenna to the desired satellite among several satellites located above the equator.

In addition, if there are many satellites, each satellite name and satellite number can be selected by remote control to automatically operate the parabolic antenna and implement satellite tracking.

Here, the process of setting the east-west end value based on the current position at the time of initial installation of the antenna and the process of limiting the antenna driving range in the normal mode to remember and track the satellite between the east-west limit positions will be described. In the initial installation, as shown in FIG. 2, the microcomputer 10 clears the contents of the memory 30 in step 2a and assumes the current antenna position value as 3000 in step 2b. At the motor control unit 40 issues an east traveling signal (E) to drive a relay to control the actuator 50 to move the antenna 60 in the east direction.

As the actuator 50 is driven, a driving pulse is fed back to the interrupt terminal INT2 of the microcomputer 10, and the microcomputer 10 checks whether a feedback pulse is input in step 2d to detect a pulse. In step 2e, the antenna 60 decreases the position value by 1 and loops to step 2c.

While repeating the steps of (2e) and (2e) in step (2c), whenever the feedback pulse is found, the antenna 60 position value is decreased by one so that the feedback pulse is not detected in step (2d). In operation 2f, the current position value of the antenna 60 is stored in the memory 36.

In this case, the memory 30 may be configured as an electrically erasable and programmable ROM. Also, as described above, the feedback pulse is not detected because the pulse is not fed back when the antenna 60 reaches the east end (EE), as shown in FIG. The com 60 detects this and the current position value of the antenna 60 to be recorded is the east end position value.

After the current position value is stored in the memory 30 as described above, the control unit 20 controls the on-screen display (OSD) in step 2g to display the EE point on the TV screen. Make it visible.

After performing the above process, the user can freely move the antenna in the east-west direction by the antenna up / down key of the remote control until the user inputs a specific key. Since it is not necessary to receive all the channels in the various phases, it is common to set the limit of the receiving channel so that it can be received only within the desired range. Therefore, usually, as described above, after the east end position is set, the east and west limits are determined as shown in FIG. 3 through a process as shown in FIG.

That is, when the antenna position value until the east limit is set is moved based on the position of the pulse musk 3000 arbitrarily determined at initial installation, and the user inputs the limit setting key, as shown in FIG. 4, the microcomputer 60 is shown. When the kisscan operation is performed in step (4a), the key setting routine is executed in step (4c) when the key is not the limit setting key after confirming that the key is the limit setting key in step (4b).

For example, if the key is processed, for example, when the antenna up or down key is inputted, it refers to a task for appropriately moving the antenna accordingly.

On the other hand, if it is determined that the limit setting key in step (4b), the microcomputer (60) checks whether the east limit (EL) is set in step (4d).

If the east limit is not set, set the east limit (EL) by storing the current position in the memory (30) in step (4g), replace the current position value with 1000 in step (4h), and then enter the OSD in step (4i). Terminate after the operation. At this time, the current position in the step (4g) is the actual value when the antenna is located at the east limit point EL based on 3000 at the time of initial installation, and in step (4h), the current position value is arbitrarily selected at the east limit point of the antenna. The reference value is replaced with 1000.

On the other hand, if the east limit (EL) has been set in step (4d), go to step (4e) to check whether the west limit is set. If not, in step 4f, the current position value is stored in the memory 30 in the west. Set the limit WL and execute the OSD operation in step 4i.

In step (4f), the current position is the value where the antenna is moved to the west based on the east limit (EL) value of 1000. On the other hand, if the west limit (WL) is set in step (4e), it is terminated as an invalid key.

However, even when the initial and limit ranges are accurately set as described above, even though the desired antenna position value is displayed on the monitor TV screen, the screen of the desired contents may not be properly received. This is due to external physical factors such as rain, wind, typhoon, etc. before tracking the satellite, such that the position of the antenna is displaced, the error due to inertia when driving the antenna, or the moment of inertia caused by momentary power failure or power off during the antenna driving. Due to the fact that the parabolic antenna was driven to the relative position of the satellite to be searched for, the broadcast could not be received cleanly or in some cases even the stored satellites were impossible to track.

In this case, there is a disadvantage in that the driver must move the parabola antenna again to drive the actuator, and the inconvenience of having to re-memory the received broadcast again.

Accordingly, an object of the present invention is to provide a relative position compensation method of a parabolic antenna by a remote control key.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a system block diagram to which the present invention is applied, which stores a parabolic antenna 60, a microcomputer 10 for controlling the operation of each part of the system by receiving a remote controller input (RI), and stores various control programs and initial values. An actuator 50 connected between the memory 30 and the microcomputer 10 and the parabolic antenna 60 to transmit a feedback pulse ARP from the satellite 70 to the microcomputer 10, and the microcomputer Motor control unit 40 for changing the position of the antenna 60 through the actuator 50 by driving a relay under the control of 10), and various data processing results and antenna tracking process under the control of the microcomputer 10 It consists of an OSD synthesizing section 20 for displaying the back on the TV screen.

5 is a flowchart of the present invention, and FIG. 6 is an antenna position adjustment indication diagram according to the present invention.

The present invention will be described in detail based on the above configuration.

Assuming that the antenna position value is set to 3000 and the east end value EE is 500 and the east limit EL is set to 700 through the operation of FIG. When the user sets the antenna position value for the satellite to be received by using the remote controller to 2700, the microcomputer 10 controls the OSD synthesizer 20 to display 2700 on the TV screen.

However, if the relative value of the antenna position is distorted as shown in (P1) of FIG. 6 due to inertia, external factors such as rain, wind, typhoon, etc., the actual position is correct even though 2700 is displayed on the TV screen. The screen may be choppy.

At this time, the user makes a position search command through the remote control key input and finds the exact position of the antenna 60 through the process as shown in FIG. That is, in step (A1), the current position value 2700 of the antenna 60 is stored in the internal memory of the microcomputer 10, and in step (A2), the east end value 500 is read from the memory 30 and replaced with the current position buffer ( In step A3), the OSD synthesizer 20 is controlled to block the east end value on the screen.

After performing step (A3), in step (A4), the microcomputer 10 drives the relay of the motor control unit 40 with the east drive control port high to move the antenna 60 in the east direction through the actuator 50. Move to. After performing step (A4), check the presence or absence of the actuator return pulse (ARP) in step (A5) to check whether the antenna has reached the east end point.

As a result of the check, if there is a feedback pulse, the motor continues to drive east, and if there is no feedback pulse, it means that the east end point has been reached. In step (A6), the OSD indicates that the antenna 60 has reached the east end point. And the motor is stopped in step (A7).

Here, even if the motor is operated through the above process, the current position value does not change, and as a result of performing the process (A1)-(A7), the antenna 60 is moved from the (P1) position to the EE position as shown in (A) of FIG. . After modifying step (A7), the microcomputer 10 proceeds to step (B1) to first determine whether the user has arbitrarily set a restricted area, and if the restricted area is set, the process (B2) to (B8) will be described later. Proceed with steps (C1)-(C9) and if no restricted area is established, proceed directly to step (C1). Therefore, in setting the restricted area, the initial value 700 of the east limit stored in the memory 30 is read in step (B2), recorded in the internal RAM of the microcomputer 16, and the east limit value is recorded in the step (B3). Display. After performing step (B3), proceed to step (B4) to drive the motor to the west with the west drive control port of the microcomputer 10 high, and return the current position value in step (B5) whenever a feedback pulse is found. Increment by 1 After performing step (B5), compare the current position value with the east limit value in step (B6). At this time, if the current position value is increased from 500 to 700, the east limit value 700, the east limit point (EL) memorized when the antenna 60 is initially installed at the east end point (EE) as shown in (B) of FIG. Since this situation is displayed in step (B7), the motor drive is stopped by putting both east and west drive control ports (E, W) of the microcomputer 60 in the step (B8). If after step (B8) or the step (B1) it is determined that the restricted area is not set, go to step (C1) to replace the contents of the current position buffer with 1000. This is because during the initial installation of the antenna (4h), the east limit of the antenna was replaced with 1000, and the satellite was stored and tracked.

Next, in step C2, the current position buffer value is compared with the position value 2700 selected by the user stored in the internal RAM of the microcomputer 10 in step A1. If it is determined that the comparison is not the same, if the current position buffer value is smaller than the value selected by the initial user in step (C3), the antenna 60 is driven west in step (C4), and the current step is detected in step (C6) every time the feedback pulse is detected. Decreases the position value. On the other hand, when the current position buffer value is larger than the value selected by the initial user, the antenna 60 is driven east to increase the current position value every time the feedback pulse occurs.

As a result of driving the motor in the east-west direction, the current position buffer value is increased or decreased so that the current position buffer value becomes the same as the position value set by the initial user. Displaying information indicating that the position has been compensated and reached the settled position, and in step (C8) is issued a return command to the normal mode (step C9), the motor is stopped and terminated in step (C9).

In the present invention, since the antenna position value set by the user in the initial stage (A1) is assumed to be 2700, as shown in (C) of FIG. 6, the antenna 60 is driven to the west to the precisely compensated position P2. To reach.

As described above, when the location search operation is completed, the user can call all the satellites stored in the past to receive the broadcast, and when the power is turned off, the current antenna value is immediately saved in the memory 30 and read back at the beginning of the program reset. do.

As described above, the user can easily track the exact position of the antenna by a simple remote control of the user, and there is a convenient advantage by allowing the OSD to monitor the tracking process.

Claims (1)

1. A parabolic antenna position compensation method of a satellite tracking device, comprising: a first process of storing an antenna current position value and then moving the antenna to an east limit point when setting an east end point or a limited range; A second process of replacing the antenna; a third process of driving the antenna in the east and west directions until the reference value and the stored antenna current position value coincide; and when the reference value coincides with the antenna current position value, the antenna driving is performed. And a fourth step of stopping, returning to the on-screen display of the position compensation information, and returning to the normal mode.

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