KR19990079989A - Digital satellite receiving antenna automatic direction control device and method - Google Patents

Abstract

The present invention relates to a satellite broadcasting reception antenna, and more particularly, in a digital satellite broadcasting receiver to automatically adjust a satellite reception antenna, a comparison value of a signal-to-noise ratio output from the QPSK demodulator 20 and an output from the remote control receiver 90. A central processing unit (100) for receiving the selected selection signal and outputting a control signal; An antenna driver 110 for receiving a control signal output from the central processing unit 100 and outputting a motor driving signal to drive the antenna up / down, left / right; A first step motor 120 which receives the drive signal output from the antenna driver 110 and rotates the antenna along a set axis (X or Y); A second step motor 130 which receives the driving signal output from the antenna driver 110 and performs the same operation as the first step motor 120; When the position of the antenna is adjusted in the first step motor 120 and the second step motor 130, the antenna movement locking unit for receiving the control signal output from the central processing unit 100 to fix the movement of the antenna Characterized in that it comprises a 140, when the user selects the position of the antenna via the display unit, the position of the antenna is automatically fixed by the user's selection and then fixed, and receives the radio frequency of another satellite If desired, by changing the angle of the antenna to be fixed, there is an effect that the user can receive the radio frequency at the optimal position with a single selection.

Description

Digital satellite receiving antenna automatic direction control device and method

The present invention relates to a satellite broadcasting reception antenna, and more particularly, to a digital satellite reception antenna automatic direction adjusting apparatus and method for automatically driving a motor of a satellite reception antenna to adjust a satellite reception antenna to a most accurate position to receive a radio frequency. It is about.

Conventional satellite broadcasting receiving antennas have to detect the level of the frequency intensity output from the satellite, the user should check the error value from time to time to adjust the position of the antenna, there was an inconvenience when installing an analog antenna.

The present invention is to solve the above conventional problems, in particular, by using the code of the signal reception level and signal-to-noise value recognized by demodulating the QPSK (QUADRATURE PHASE SHIFT KEYING) signal collected through the satellite signal receiving antenna The present invention provides a digital satellite receiving antenna automatic direction adjusting apparatus and method for automatically adjusting the satellite receiving antenna to an optimal position to receive radio frequency by finely adjusting the XY axis step motor attached to the antenna.

In order to achieve the above object, the digital satellite receiver antenna automatic direction adjusting device of the present invention, in the digital satellite broadcasting receiver, receives and compares the signal-to-noise ratio output from the QPSK demodulator and the selection signal output from the remote control receiver. A central processing unit for outputting a signal; An antenna driver for receiving a control signal output from the central processing unit and outputting a motor driving signal to drive the antenna up / down, left / right; A first step motor which receives the driving signal output from the antenna driver and rotates the antenna along a set axis (X or Y); A second step motor which receives the driving signal output from the antenna driver and performs the same operation as the first step motor; When the position of the antenna is adjusted in the first step motor and the second step motor, it is characterized in that it comprises an antenna movement locking unit for fixing the movement of the antenna by receiving the control signal output from the central processing unit.

On the other hand, the digital satellite receiving antenna automatic direction adjustment method comprises: an initial signal-to-noise comparison value storage step (S100) for confirming and storing the comparison value of the signal-to-noise ratio through the QPSK demodulator at the initial position of the antenna; When the comparison of the signal-to-noise of the initial antenna is stored in the initial signal-to-noise comparison value storing step (S100), the signal-to-noise comparison value is compared to the signal-to-noise comparison value after the antenna is moved at a predetermined angle. A signal-to-noise ratio comparison step (S200) for comparing the comparison value of the value storage step (S100) and the signal-to-noise comparison value when moving; In the signal-to-noise ratio comparison step (S200), if the initial signal-to-noise comparison value and the signal-to-noise comparison value when moving are compared, the signal-to-noise comparison value is compared to the + -value range when the antenna moves from the + value region to the -value region. It characterized in that it comprises an antenna moving step (S300) for moving to the optimal position in the.

1 is a block diagram showing a digital satellite receiving antenna automatic direction adjusting apparatus according to an embodiment of the present invention,

2 is a flowchart illustrating a method for automatically adjusting a digital satellite receiving antenna according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: radio frequency controller 20: QPSK demodulator

30: MPEG demultiplexer 40: MPEG decoder unit

50: video encoder section 60: audio encoder section

70: display unit 80: remote control

90: remote control receiver 100: central processing unit

110: antenna driver 111: power supply

112: first step motor driver 113: second step motor driver

120: first step motor 130: second step motor

140: antenna shift lock

Hereinafter, the above-described contents will be described in detail through an embodiment according to the present invention.

As shown in FIG. 1, first, the radio frequency controller 10 receives a radio frequency signal received from a satellite antenna to adjust a frequency band, and the QPSK demodulator 20 adjusts the radio frequency. The analog signal output from the unit 10 is converted into a digital signal to output the MPEG transmission stream and the signal-to-noise value, and the MPEG demultiplexer 30 inputs the MPEG transmission stream output from the QPSK demodulator 20. It demultiplexes the received MPEG signal and outputs it.

Then, the MPEG decoder 40 restores the demultiplexed signal output from the MPEG demultiplexer 30 to a general digital signal, and outputs the digital multiplex output from the MPEG decoder 40 in the image encoder 50. The video signal is converted into an analog video signal and output, and the audio encoder 60 converts the digital audio signal output from the MPEG demultiplexer 30 into an analog audio signal and outputs the analog audio signal.

In addition, the display unit 70 receives a signal output from the video encoder 50 and the audio encoder 60 and displays the video and audio, and the remote controller 80 selects a channel and an antenna to be received by the user. A user inputs a command to select an adjustment mode, and the remote controller 90 receives a selection signal output from the remote controller 80.

In addition, the central processing unit 100 outputs a frequency selection signal to the radio frequency controller 10, receives the signal-to-noise value output from the QPSK demultiplexer 20, and then receives the remote control receiver 90 When the control signal is output by receiving the selection signal output from the antenna driver 110 to receive the control signal output from the central processing unit 100 to move the antenna up / down, left / right Outputs the motor drive signal.

Then, the first step motor 120 receives the drive signal output from the antenna driver 110 and rotates the antenna to the set axis (X or Y), and the second step motor 130 the antenna driver ( The drive signal output from the 110 is input to perform the same operation as that of the first step motor 120, and the antenna movement locking unit 140 of the antenna in the first step motor 120 and the second step motor 130. When the position is adjusted, the control signal output from the CPU 100 is input to fix the movement of the antenna.

In addition, the power supply 111 of the antenna driver 110 receives the control signal output from the central processing unit 100 to supply power to drive the motor, in the first step motor driver 112 The control signal output from the central processing unit 100 and the power output from the power supply unit 111 are input to output a motor driving signal, and the second step motor driving unit 113 is the first step motor driving unit ( By performing the same operation as 112, the present embodiment is constructed.

Hereinafter, the operation of the digital satellite receiving antenna automatic direction adjusting device configured as described above is as follows.

When the control signal output from the central processing unit 100 is input from the radio frequency adjusting unit 10 to adjust and output the band of the radio frequency signal received from the satellite antenna, it is output from the radio frequency adjusting unit 10. The analog signal is input from the QPSK demodulator 20 and converted into a digital signal to output an MPEG transmission stream and a signal-to-noise value, and the MPEG transmission stream output from the QPSK demodulator 20 is output from the MPEG demultiplexer 30. It demultiplexes the MPEG signal that is multiplexed by the input and outputs it.

In addition, when the demultiplexed signal output from the MPEG demultiplexer 30 is received by the MPEG decoder 40 and restored to a general digital signal, the digital video signal output from the MPEG decoder 40 is an image encoder. It receives the input from the unit 50 and converts it into an analog video signal, and outputs it. The digital audio signal output from the MPEG demultiplexer 30 is received from the voice encoder 60 and converted into an analog audio signal and output.

Then, the video signal output from the video encoder 50 and the audio signal output from the audio encoder 60 is received from the display unit 70 and displayed in video and audio for the user to see, the display unit When the user sees the video and audio output from the 70 and presses a key of the remote controller 80 to select the channel selection and antenna adjustment mode that the user wants to receive, the remote controller receives the selection signal output from the remote controller 80. It receives the input from the receiver 90 and outputs.

In addition, when the signal-to-noise value output from the QPSK demultiplexer 20 and the selection signal output from the remote control receiver 90 are received from the central processing unit 100 and output a control signal, the central processing unit 100 The control signal output from the) is input from the power supply 111 of the antenna driver 110 to output the power to drive the motor.

The control signal output from the central processing unit 100 and the power output from the power supply unit 111 are used to control the first step motor driver 112 and the second step motor driver 113 of the antenna driver 110. ) Outputs a motor driving signal, and receives a driving signal output from the first step motor driver 112 from the first step motor 120 on a predetermined X-axis or Y-axis, and then generates a signal-to-noise. Rotate by value

In addition, the control signal output from the second step motor driver 113 is input from the second step motor 130 and rotates by a signal-to-noise value on a predetermined X-axis or Y-axis, which is optimal for the satellite antenna. Receive a radio frequency and receive a control signal output from the central processing unit 100 from the antenna movement locking unit 140 so that the satellite antenna does not move when the optimum position is set. Fix it.

On the other hand, digital satellite receiving antenna automatic direction adjustment method inputs the coordinates for the current position of the satellite antenna according to the latitude (A: 0 ° ~ 90 °) and longitude (B: 0 ° ~ 180 °) (S101), When the coordinates for the antenna are input in the antenna coordinate input step (S101), the coordinates of the satellite to receive the radio frequency are input according to the hardness (C: 0 ° to 180 °) (S102).

In addition, if the coordinates for the satellite is input in the satellite coordinate input step (S102), in order to obtain the reception angle of the antenna Obtained by the formula, and left / right angle Obtained by the formula as shown in (S103), the angle set to receive the frequency output from the first set satellite to store and initialize the initial set value of the satellite to receive the frequency of another satellite (S104), When the angle of the satellite first set in the initialization step (S104) is initialized, the angle at which the difference with the other satellites is calculated is calculated as up / down and left / right angles (S105).

Then, when the changed angle is calculated in the change angle calculation step (S105), the central processing by calculating the X-axis driving torque of the antenna by a constant (ie, F * T _A ) corresponding to the X-axis upper / lower angle multiplied by 1 degree change. If the device outputs a control signal (S106), and the X-axis drive torque is calculated in the X-axis drive torque calculation step (S106), the constant corresponding to the Y-axis drive torque multiplied by the Y-axis left / right angles by 1 degree. (I.e., G * T _A ) to output the control signal from the central processing unit 100 (S107), and if the Y-axis drive torque is calculated in the Y-axis drive torque calculation step (S7), the set signal A comparison value of large noise (for example, J = 0 to 20) is stored (S108).

In addition, if the comparison value of the signal-to-noise is stored in the storing step (S108), each time the X-axis is moved to the left by 1 degree, the set value of the signal-to-noise is stored (S201), and the comparison value storage step when the left movement ( In step S201, when the set value of the signal-to-noise when moving to the left is stored, the comparison value of the signal-to-noise when the X-axis moves to the right by one degree (S202), and storing the comparison value when the left-hand movement (S201) In the case where the comparison value of the signal-to-noise when moving to the left and the comparison value when moving to the right in the step of storing the comparison value when moving to the right (S202) are stored, the angle set in the direction of (+) value from the comparison value is The control unit 100 transmits a control signal by raising the control signal, and repeats the operation until the negative value is obtained in comparison with the comparison value during control signal transmission (S203).

When the signal-to-noise value is compared in the signal-to-noise value repetition comparison step (S203), the set signal-to-noise comparison value (J = 0 to 20) is stored whenever the Y-axis is moved upward by 1 degree. (S204) If the comparison value of the signal-to-noise when moving to the upper side in the comparison value storage step (S204) is stored, the comparison value of the set signal-to-noise each time the Y-axis is moved downward by 1 degree Save (S205).

Also, if the comparison value is stored when the comparison value is stored in the upper and lower movements in the comparison value storage step (S204) and in the lower movement, the comparison value storage step (S205), the angle set in the (+) value direction is increased from the comparison value. The control unit 100 transmits the control signal, and repeats the operation until the negative value is obtained by comparing with the comparison value during the control signal transmission (S301).

Further, when the signal-to-noise value is repeatedly compared in the first signal-to-noise value iteration comparison step (S203) and the second signal-to-noise value iteration comparison step (S301), the comparison value storing step (S201) and the left shift Fixing the comparison value of the signal-to-noise of the comparison value storage step (S202), the comparison value storage step (S204) and the comparison value storage step (S205) when moving to the lower side to the optimum position in the (+) region, The central processing unit 100 outputs a fixed control signal to the antenna movement locking unit 160 (S302).

As described above, according to the present invention, when the user selects the position of the antenna through the display unit, the position of the antenna is automatically fixed by the user's selection and then fixed. If you want to receive the radio frequency of the satellite, by changing the angle of the antenna is fixed, there is an effect that the user can receive the radio frequency at the optimal position with a single selection.

Claims (9)

A digital satellite broadcasting receiver comprising: a central processing unit for receiving a comparison value of a signal-to-noise ratio output from a QPSK demodulation unit and a selection signal output from a remote control unit and outputting a control signal; An antenna driver for receiving a control signal output from the central processing unit and outputting a motor driving signal to drive the antenna up / down, left / right; A first step motor which receives the driving signal output from the antenna driver and rotates the antenna along a set axis (X or Y); A second step motor which receives the driving signal output from the antenna driver and performs the same operation as the first step motor; When the position of the antenna is adjusted in the first step motor and the second step motor, the digital satellite comprising an antenna movement locking unit for receiving the control signal output from the central processing unit to fix the movement of the antenna Receiving antenna auto direction adjuster. The apparatus of claim 1, wherein the antenna driver comprises: a power supply unit configured to receive a control signal output from the central processing unit and supply power to drive the step motor; A first step motor driver for receiving the control signal output from the central processing unit and the power output from the power supply unit and outputting a motor driving signal; And a second step motor driver configured to perform the same operation as that of the first step motor driver. An initial signal-to-noise comparison value storing step (S100) of checking and storing a comparison value of a signal-to-noise ratio through a QPSK demodulator at an initial position of the antenna; When the comparison of the signal-to-noise of the initial antenna is stored in the initial signal-to-noise comparison value storing step (S100), the signal-to-noise comparison value after the antenna is moved at an angle in a direction is determined. A signal-to-noise ratio comparison step (S200) for comparing the comparison value of the comparison value storing step (S100) and the signal-to-noise comparison value when moving; In the signal-to-noise ratio comparison step (S200), if the initial signal-to-noise comparison value and the signal-to-noise comparison value when moving are compared, the signal-to-noise comparison value is compared to the + -value range when the antenna moves from the + value region to the -value region. Digital satellite receiving antenna automatic direction adjustment method comprising the step of moving to the optimum position in the antenna (S300). The method of claim 3, wherein the storing of the initial signal-to-noise comparison value (S100) is based on latitude (A: 0 ° to 90 °) and longitude (B: 0 ° to 180 °). An antenna coordinate input step (S101); If the coordinates for the antenna is input in the antenna coordinate input step (S101), the satellite coordinate input step (S102) for inputting the coordinates of the satellite to receive the radio frequency according to the hardness (C: 0 ° ~ 180 °); A reception angle calculation step (S103) of obtaining reception angles of up / down, left / right antennas when the coordinates of the satellites are input in the satellite coordinates input step (S102); An initializing step (S104) of initializing the angle set to receive the frequency output from the first set satellite and storing the initial set value of the first satellite to receive a frequency of another satellite; A change angle calculation step (S105) of calculating an angle at which a difference from another satellite occurs in up / down and left / right angles when the angle of the satellite initially set in the initialization step (S104) is initialized; An X-axis driving torque calculation step (S106) for calculating the X-axis driving torque of the antenna and outputting a control signal from the central processing unit when the changed angle is calculated in the step of calculating the change angle (S105); If the X-axis drive torque is calculated in the X-axis drive torque calculation step (S106), the Y-axis drive torque calculation step (S107) to calculate the Y-axis drive torque to output a control signal from the central processing unit; If the Y-axis drive torque is calculated in the Y-axis drive torque calculation step (S107), the digital satellite reception antenna automatic direction adjustment method characterized in that it comprises a storage step (S108) for storing a comparison value of the signal-to-noise. The method of claim 4, wherein the upper / lower angle of the reception angle calculation step (S103) is Is given by the same formula, and the left and right angles are Digital satellite receiving antenna automatic direction control method characterized in that obtained by the formula. The X-axis driving torque calculation of the X-axis driving torque calculation step S106 is a constant corresponding to the change of the upper / lower angle times one degree by the calculation of the antenna position changing angle, that is, F * T _A. Digital satellite reception antenna automatic direction control method characterized in that obtained by the formula. The Y-axis drive torque calculation of the Y-axis drive torque calculation step (S107) is a constant corresponding to the change of the upper / lower angle times one degree by the calculation of the position change angle of the antenna, that is, F * T _A and Digital satellite receiving antenna automatic direction control method characterized in that obtained by the same formula. The method of claim 3, wherein the signal-to-noise ratio comparison step (S200) stores the comparison value of the signal-to-noise each time the X-axis is shifted left by one degree if the comparison value of the signal-to-noise is stored in the storage step (S108). A comparison value storing step (S201) when left moving; Saving the comparison value of the signal-to-noise when moving to the left in the comparison value storage step when moving to the left (S201), the comparison value during the right-movement storing the comparison value of the signal-to-noise every time the X-axis moves to the right by 1 degree (S202); When the comparison value of the signal-to-noise when moving to the left in the comparison value storage step when moving to the left (S201) and the comparison value of the signal-to-noise when moving to the right in the comparison value storage step (S202) when moving to the right And repeating the first signal-to-noise value comparison step of repeating the control signal by increasing the angle set in the positive value direction from the comparison value and comparing the comparison value with the comparison value during the control signal transmission. (S203); Comparing the signal-to-noise value in the iterative comparison of the signal-to-noise value (S203), and storing the comparison value of the signal-to-noise when the Y-axis is moved upward by one degree (S204); If the comparison value of the signal-to-noise when moving to the upper side in the storage of the comparison value when moving to the upper side (S204) is stored, the comparison value when moving to the lower side storing the comparison value of the signal-to-noise when the Y-axis is moved downward by 1 degree Digital satellite receiving antenna automatic direction control method characterized in that it comprises a storage step (S205). The method of claim 3, wherein the antenna shift step (S300) is a comparison value of the signal-to-noise when moving upward in the comparison value storage step (S204) when moving upward and upwards in the comparison value storage step (205) when moving downward When the comparison value is stored when moving, the control signal is transmitted by raising the angle set in the positive value direction from the comparison value, and repeating the comparison value until the negative value is obtained. Two signal-to-noise value iteration comparison steps (S301); When the signal-to-noise value is repeatedly compared in the first signal-to-noise value iteration comparison step (S203) and the second signal-to-noise value iteration comparison step (S301), when the left side movement when the comparison value storage step (S201) and the right side movement Fixed the comparison value of the signal-to-noise of the comparison value storage step (S202) and the comparison value storage step (S204) when moving upward and the comparison value storage step (S205) when moving downward, to the optimum position in the (+) region, the antenna movement Digital satellite reception antenna automatic direction control method comprising a fixed control signal output step (S302) for outputting a fixed control signal to the locking unit.