JP4818447B1 - Antenna control apparatus and antenna control method - Google Patents

Abstract

According to one embodiment, an antenna control apparatus (16) includes a movement controller (102), a measuring module (103), and an acquiring module (104). The movement controller (102) controls a moving module (22) that moves an antenna (21) to a receiving position in response to a change of a target satellite from which the satellite broadcasting is received to move the antenna (21) from a reference position to the receiving position. The measuring module (103) measures a moving time required to move the antenna (21) from the reference position to the receiving position for each satellite. The acquiring module (104) acquires, when the target satellite changes from one to another, a timeout period required to move the antenna (21) from a receiving position of the one satellite to that of the other satellite based on moving times measured for the satellites.

Description

  Embodiments described herein relate generally to an antenna control device and an antenna control method.

  When receiving satellite broadcasts from a plurality of satellites using a single satellite antenna and LNB (Low Noise Block Converter), the satellite antenna is moved using a rotationally driven motor. Reception is defined by the DiSEqC standard and is generally used (see Patent Document 1).

Japanese Patent Application Laid-Open No. 07-162774

  By the way, there are mainly four versions of the DiSEqC standard: DiSEqC1.0, 1.1, 1.2, and 2.0. In DiSEqC1.2, the receiver side that receives satellite broadcasts and the motor Two-way communication between them is not possible. Specifically, in DiSEqC1.2, the receiver side can control the motor, but the receiver side cannot obtain information about the motor such as the current position information of the satellite antenna from the motor.

  Therefore, the receiver side outputs a command for moving the satellite antenna to the motor, and then the motor is driven to rotate so that the satellite antenna has moved to a position where it can receive satellite broadcasts from the satellite. There is no way to know how much timeout time is required before moving to a position where it can be received. Therefore, if the receiver side cannot receive the satellite broadcast of the channel selected by the user, if it does not wait for the longest timeout time required for the movement of the satellite antenna, it can not receive the satellite broadcast because there is no signal, There is a problem that it is impossible to determine whether the satellite broadcast cannot be received because the satellite antenna is moving, and it is impossible to determine the cause of the satellite broadcast not being received.

  The present invention has been made in view of the above, and an object of the present invention is to provide an antenna control device and an antenna control method capable of reducing the time-out time required for channel selection.

  The antenna control apparatus according to the embodiment includes a movement control unit, a measurement unit, and an acquisition unit. The movement control unit controls a moving unit that moves the antenna to a receiving position where satellite broadcasting can be received according to a change in a satellite to be received, and moves the antenna from a reference position to the receiving position. The measuring means measures a moving time required for the antenna to move from the reference position to the receiving position for each satellite received by the antenna. When the satellite received by the antenna is changed to another satellite, the acquisition means calculates the satellite before change from the movement time measured for the satellite before change and the movement time measured for the other satellite. The time-out time required for the movement of the antenna from the receiving position to the receiving position of the other satellite is acquired.

FIG. 1 is a diagram showing a configuration of a satellite broadcast receiving system according to the present embodiment. FIG. 2 is a diagram illustrating an example of channels that can be selected in the satellite broadcast receiving system according to the present embodiment. FIG. 3 is a flowchart showing a flow of measurement processing of the moving time and moving direction at the time of setup of the receiving apparatus. FIG. 4 is a flowchart showing a flow of measurement processing of the moving time and moving direction at the time of setting up the receiving apparatus. FIG. 5 is a flowchart showing the flow of the moving process of the antenna body when the channel is selected when viewing the satellite broadcast and the satellite receiving the satellite broadcast radio wave is changed from the satellite B to the satellite A. FIG. 6 is a diagram showing an example of movement of the antenna body when a channel is selected when viewing satellite broadcasting and the satellite that receives the satellite broadcasting radio waves is changed from satellite B to satellite A. FIG. 7 is a diagram illustrating an example of a message displayed on the display unit while the antenna is moving. FIG. 8 is a diagram illustrating an example of a message displayed on the display unit after the timeout time. FIG. 9 is a diagram illustrating an example of a message displayed on the display unit after the timeout time. FIG. 10 is a diagram illustrating an example of a message displayed on the display unit while the antenna is moving. FIG. 11 is a flowchart showing a flow of measurement processing of the movement time and movement direction at the time of setup of the receiving apparatus. FIG. 12 is a flowchart showing the flow of the moving process of the antenna body when the channel is selected when viewing the satellite broadcast and the satellite that receives the satellite broadcast radio wave is changed from the satellite B to the satellite A.

(First embodiment)
FIG. 1 is a diagram showing a configuration of a satellite broadcast receiving system according to the present embodiment. As shown in FIG. 1, a satellite broadcast receiving system 1 according to this embodiment includes a receiving device 10, a satellite antenna 20, and the like.

  The satellite antenna 20 receives satellite broadcasts from a plurality of satellites A and B. In this embodiment, the satellite antenna 20 includes an antenna body 21, a motor 22, a LNB (Low Noise Block Converter) 23, and the like.

  The antenna body 21 receives satellite broadcast radio waves from the satellites A and B to be received.

  The LNB 23 functions as a conversion device that amplifies satellite broadcast radio waves received from the satellites A and B to a level that can be handled by the receiving device 10 (satellite tuner 11), and then converts the frequency of the amplified radio waves. In addition, the LNB 23 receives satellite broadcast radio waves received from the satellites A and B by the antenna body 21 in accordance with a voltage of 13V or 18V (hereinafter referred to as LNB voltage) applied by the receiving device 10 (LNB controller 15). It also functions as a switching device for switching poles (polarization method).

  In the present embodiment, the LNB 23 switches the polarities of the satellite broadcast radio waves received from the satellites A and B by the antenna body 21 to the vertical polarization when the receiving device 10 applies the 13 V LNB voltage. On the other hand, when an LNB voltage of 18 V is applied by the receiving device 10, the LNB 23 switches the polarities of satellite broadcast radio waves received from the satellites A and B by the antenna body 21 to horizontal polarization.

  The motor 22 is rotationally driven in accordance with a command output from the receiving device 10 to move the antenna body 21 to a position where the satellite broadcast radio wave can be received from the satellites A and B (hereinafter referred to as a reception position). . The motor 22 is driven to rotate by the LNB voltage applied to the LNB 23. In the present embodiment, the motor 22 is rotationally driven by two types of LNB voltages of 13V and 18V, and the speed of moving the antenna body 21 increases as the LNB voltage applied to the LNB 23 increases. Specifically, the motor 22 has a speed at which the antenna body 21 moves when an LNB voltage of 18 V is applied to the LNB 22 (when the polarities of satellite broadcast radio waves received from the satellites A and B are horizontally polarized waves). When the LNB voltage of 13 V is applied to the LNB 22 (when the pole of the satellite broadcast radio wave received from the satellites A and B is vertically polarized), the speed becomes faster than the speed at which the antenna body 21 is moved.

  In the present embodiment, the motor 22 includes a storage unit 22b and a control unit 22a. The storage unit 22b stores a reception position for each satellite and a preset reference position of the antenna body 21. The control unit 22a reads the reception position or the reference position from the storage unit 22b in accordance with the command output from the receiving device 10. The controller 22a rotates the motor 22 to move the antenna body 21 to the read reception position or reference position.

  The receiving device 10 converts the signal converted from the radio wave of the satellite broadcast in the LNB 23 included in the satellite antenna 20 into a video signal and an audio signal, and displays a video based on the video signal and the audio signal on the display unit 14. It outputs sound.

  The receiving apparatus 10 includes a satellite tuner 11, a demodulator 12, a decoder 13, a display unit 14, an LNB controller 15, a control unit 16, a memory 17, and the like.

  The satellite tuner 11 extracts a signal converted from the satellite broadcast radio wave of the channel selected by the control unit 16 from the signal converted in the LNB 23.

  The demodulator 12 demodulates the channel signal extracted by the satellite tuner 11. The demodulator 12 includes, for example, a PSK (Phase Shift Keying) demodulator and an APSK (Amplitude Phase Shift Keying) demodulator. Here, the demodulator 12 performs a process of demodulating the MPEG / TS signal from the signal extracted by the satellite tuner 11.

  The decoder 13 performs TS decoding processing of the MPEG / TS signal supplied from the demodulator 12. In the TS decoding process by the decoder 13, the digital broadcast signal (digital video signal and digital audio signal) of the program broadcast by the broadcast station is extracted from the signal extracted by the satellite tuner 11. The decoder 13 outputs the digital video signal and digital audio signal obtained by the TS decoding process to the display unit 14.

  The display unit 14 displays video based on the video signal among the digital broadcast signals supplied from the decoder 13 based on control by the control unit 16. The display unit 14 performs various image processing on the video. For example, the display unit 14 has an OSD (on-screen display) composition function. With this function, for example, when character information is supplied from the control unit 16, the display unit 14 converts the character information into display data, and displays the display data. The display unit 14 includes a speaker (not shown) that outputs sound based on the sound signal.

  The LNB controller 15 applies an LNB voltage to the LNB 23 provided in the satellite antenna 20 according to the pole set by the control unit 16. Specifically, when vertical polarization is set by the control unit 16, the LNB controller 15 applies an LNB voltage of 13 V to the LNB 23 included in the satellite antenna 20, and the control unit 16 generates horizontal polarization. When set, an LNB voltage of 18 V is applied to the LNB 23 provided in the satellite antenna 20.

  The control unit 16 is a main part of the receiving device 10 and controls each unit intensively. In the present embodiment, the LNB controller 15 and the control unit 16 rotate the motor 22 in accordance with the change of the satellites A and B that receive the satellite broadcast by the satellite antenna 20, and move the satellite antenna 20 to the reception position. Functions as a control device.

  The control unit 16 is a microprocessor with a built-in CPU (Central Processing Unit) and the like, and controls each unit so that operation content from an operation unit (not shown) is reflected. In this case, the control unit 16 uses the memory 17. The memory 17 mainly stores a ROM (Read Only Memory) storing a control program executed by the CPU, a RAM (Random Access Memory) for providing a work area to the CPU, various setting information, control information, and the like. And a non-volatile memory. The control unit 16 is realized by the CPU executing the control program stored in the memory 17.

  The control unit 16 includes a setting unit 101, a movement control unit 102, a measurement unit 103, an acquisition unit 104, a display control unit 105, and the like.

  The setting unit 101 sets the poles of the satellite broadcast radio waves received from the satellites A and B and the satellite broadcast bands received from the satellites A and B at the time of setup of the receiving apparatus 10 and channel selection. In the present embodiment, the setting unit 101 sets horizontal polarization or vertical polarization as the pole of the satellite broadcast radio wave received from the satellites A and B. Further, the setting unit 101 changes the pole of the satellite broadcast radio wave received from the satellites A and B when the satellite body 21 receives the satellite broadcast when the channel is selected and moves the antenna body 21 to the reception position. Among the horizontal polarization and vertical polarization), the pole (horizontal polarization) at which the LNB voltage applied to the LNB 23 by the LNB controller 15 is the highest is set. The setting unit 101 sets a Low band or a High band as a satellite broadcast band received from the satellites A and B. Here, the Low band is a 9.6 to 10.6 GHz band, and the High band is a 10.6 to 11.6 GHz band. In the present embodiment, the setting unit 101 sets poles and bands according to selection by the user via an operation unit (not shown).

  The setting unit 101 selects a channel according to the set pole and band. FIG. 2 is a diagram illustrating an example of channels that can be selected in the satellite broadcast receiving system according to the present embodiment. As shown in FIG. 2, the setting unit 101 can select channels 1 and 2 when the satellite antenna 20 has moved to a receiving position where satellite broadcasting from the satellite A can be received. When the antenna 20 is moved to a receiving position where the satellite broadcast from the satellite B can be received, the channels 3 and 4 can be selected.

  In addition, when a channel is selected during viewing of satellite broadcast, the setting unit 101 performs tuning to match the frequency of the signal extracted by the satellite tuner 11 with the frequency of the radio wave of satellite broadcast of the selected channel. Furthermore, the setting unit 101 does not lock the demodulator 12 even if the time required for tuning (hereinafter referred to as the tuning time) exceeds a preset maximum tuning time (hereinafter referred to as the maximum tuning time). Or if the demodulator 12 locks within the maximum tuning time. Note that the setting unit 101 calculates a time obtained by adding a predetermined time to the tuning time stored in the memory 17 as a new tuning time every time a predetermined time elapses during tuning, and stores it in the memory 17. . The setting unit 101 resets the tuning time stored in the memory 17 before tuning.

  The movement control unit 102 controls the motor 22. The movement control unit 102 controls the rotational drive of the motor 22 when selecting a channel and setting up the receiving apparatus 10 to move the antenna body 21 from the reference position to the receiving position.

  In the present embodiment, at the time of setup of the receiving device 10, the movement control unit 102 rotates the motor 22 at a predetermined time in the continuous mode until the antenna main body 21 moves to the reception position, so that the antenna main body 21 moves east or Move west. Here, the Continuous mode is a mode in which the motor 22 is continuously rotated and the antenna body 21 is roughly moved to the reception position.

  Then, the movement control unit 102 confirms that the level of the signal input to the demodulator 12 is maximized when the demodulator 12 is locked, or the C / N of the signal input to the demodulator 12. When the ratio is good, it is determined that the antenna body 21 has moved to the reception position, and the rotation drive of the motor 22 is stopped. The movement control unit 102 determines whether or not the demodulator 12 is locked based on whether or not the demodulator 12 has received a signal from the satellite tuner 11 and is ready to demodulate the received signal. To do.

  Next, when the antenna main body 21 moves to the reception position and the rotation drive of the motor 22 stops, the movement control unit 102 rotates the motor 22 in the Step mode to move the antenna main body 21 east or west. The position of the antenna body 21 is finely adjusted. Here, the Step mode is a mode in which the antenna body 21 is moved finely by rotating the motor 22 in units of predetermined steps. Then, when the C / N ratio of the signal input to the demodulator 12 becomes good, the movement control unit 102 stores it in the storage unit 22b included in the motor 22 as the reception position of the antenna body 21.

  The measurement unit 103 measures, for each satellite, the moving time required for the antenna body 21 to move from the reference position to the receiving position when setting up the receiving device 10. In the present embodiment, the measurement unit 103 drives the motor 22 to rotate by the Step mode and the total time that represents the total time for which the motor 22 has been rotationally driven by the Continuous mode before the movement of the antenna body 21 is started. Reset the total step that represents the total number of steps. It is assumed that the total time and the total step are stored in the memory 17.

  Then, the measuring unit 103 adds / subtracts the predetermined time to / from the total time every time a predetermined time elapses while the motor 22 is rotationally driven in the continuous mode, and stores the calculated total time in the memory 17. To do. For example, the measurement unit 103 adds the predetermined time to the total time when the motor 22 rotates in the continuous mode and the antenna body 21 moves east and the predetermined time has elapsed. On the other hand, the measurement unit 103 subtracts the predetermined time from the total time when the motor 22 rotates in the continuous mode and the antenna main body 21 moves west and the predetermined time has elapsed.

  Next, while the motor 22 is rotationally driven in the Step mode, the measurement unit 103 adds / subtracts the number of steps rotated by the motor 22 with respect to the total steps, and stores the calculated total steps in the memory 17. . For example, the measurement unit 103 rotates the motor 22 in the Step mode and adds the number of steps to the total steps when the antenna body 21 moves east. On the other hand, the measurement unit 103 rotates the motor 22 in the Step mode and subtracts the number of steps from the total step when the antenna body 21 moves west.

  Note that the measurement unit 103 calculates the total time when the pole set by the setting unit 101 at the time of setup of the receiving device 10 is vertically polarized or when the total step calculated by the control unit 16 is larger than the reference step. fix. Specifically, the measurement unit 103 rotates the motor 22 via the movement control unit 102 to move the antenna body 21 to the reference position. Further, the measurement unit 103 performs resetting of poles (horizontal polarization) and bands, and channel reselection via the setting unit 101. Next, the measurement unit 103 resets the total time. Thereafter, the measurement unit 103 rotates the motor 22 via the movement control unit 102 to move the antenna body 21 from the reference position to the reception position, and the time until the antenna body 21 moves from the reference position to the reception position. Is calculated as the total time. That is, the measurement unit 103 can calculate the total time when the highest voltage is applied among the voltages applied to the LNB 23 by the LNB controller 15.

  When the total time is calculated by the above processing, the measurement unit 103 measures the absolute value of the calculated total time as the movement time required for the antenna body 21 to move from the reference position to the reception position. Note that the measurement unit 103 recalculates the total time when the pole set by the setting unit 101 at the time of setup is vertical polarization, and thus the most of the LNB voltage applied to the LNB 23 by the LNB controller 15. The travel time when a high LNB voltage is applied can be measured.

  In addition, the measurement unit 103 measures, for each satellite, the moving direction in which the antenna body 21 has moved from the reference position to the reception position when setting up the receiving device 10. In the present embodiment, the measurement unit 103 measures the moving direction based on whether or not the calculated total time is greater than “0”. Specifically, the measurement unit 103 determines that the antenna body 21 has moved east when the calculated total time is greater than “0”. On the other hand, when the calculated total time is smaller than “0”, the measurement unit 103 determines that the antenna body 21 has moved west.

  Then, the measuring unit 103 stores the measured moving time and moving direction in the memory 17.

  In addition, when the channel is selected by the user when viewing the satellite broadcast and the satellites A and B that receive the radio wave of the satellite broadcast are changed by the antenna main body 21, the acquisition unit 104 stores the satellite before the change from the memory 17. The measured moving time and moving direction, and the moving time and moving direction measured for the changed satellite (other satellites) are acquired. Then, the acquisition unit 104 can receive a satellite broadcast from the satellite before the change from the movement time and direction measured for the satellite before the change and the movement time and direction measured for the satellite after the change. The time required to move the antenna main body 21 from the changed satellite to the receiving position where the satellite broadcast can be received (hereinafter referred to as a timeout time) is acquired.

  The display control unit 105 determines whether the antenna unit 21 has “moving”, “currently moving%”, “cannot receive”, “the level of the received signal is low”, etc. Display related to movement or signal reception status.

  Further, the display control unit 105 determines whether or not the demodulator 12 is locked while tuning is performed by the setting unit 101. The display control unit 105 determines that the satellite broadcast cannot be received from the satellites A and B when the tuning is completed without the demodulator 12 being locked even if the tuning time exceeds the maximum tuning time. The reception process is terminated. On the other hand, when the demodulator 12 is locked within the maximum tuning time, the display control unit 105 inputs the signal demodulated by the demodulator 12 to the decoder 13 and the digital video signal subjected to the TS decoding process in the decoder 13 and A digital audio signal is output to the display unit 14.

  Next, with reference to FIG. 3 and FIG. 4, the measurement process of the movement time and movement direction when setting up the receiving apparatus 10 will be described. FIG. 3 and FIG. 4 are flowcharts showing the flow of measurement processing of the movement time and movement direction during the setup of the receiving device.

  First, the movement control unit 102 first outputs a command to the control unit 22a included in the motor 22 to rotationally drive the motor 22 to move the antenna body 21 to the reference position (step S301). Next, the setting unit 101 sets the pole of the satellite broadcast radio wave received from the satellite A and the band of the satellite broadcast received from the satellite A (step S302), and selects a channel according to the set pole and band. (Step S303). Further, the measurement unit 103 resets the total time and the total step stored in the memory 17 to “0” (step S304).

  Next, the movement control unit 102 drives the motor 22 to rotate in the continuous mode, and moves the antenna body 21 to the east or west (step S305). Then, the movement control unit 102 determines whether the demodulator 12 is locked while the antenna body 21 is moving, whether the level of the signal input to the demodulator 12 is maximized, or input to the demodulator 12. It is determined whether the C / N ratio of the received signal is good (step S306).

  Here, while the antenna body 21 is moved for a predetermined time, the demodulator 12 does not lock, the level of the signal input to the demodulator 12 does not become maximum, and the signal input to the demodulator 12 does not reach the maximum level. If the C / N ratio is not good (step S306: No), the movement control unit 102 temporarily stops the rotational drive of the motor 22 (step S307). Then, the measurement unit 103 determines whether the antenna body 21 has moved in the east or west movement direction (step S308). When it is determined that the antenna body 21 has moved in the east movement direction (step S308: east), the measurement unit 103 calculates a time obtained by adding a predetermined time to the total time stored in the memory 17 as a new total time. And stored in the memory 17 (step S309). On the other hand, when it is determined that the antenna body 21 has moved in the west movement direction (step S308: west), the measurement unit 103 sets a time obtained by subtracting a predetermined time from the total time stored in the memory 17 as a new total time. Calculate and store in the memory 17 (step S310).

  On the other hand, while the antenna body 21 is moved for a predetermined time, the demodulator 12 is locked, the level of the signal input to the demodulator 12 is maximum, or the C / N ratio of the signal input to the demodulator 12 is good. When it becomes (step S306: Yes), the movement control part 102 judges that the antenna main body 21 moved to the receiving position, and stops the rotational drive of the motor 22 (step S311).

  Next, the movement control unit 102 finely adjusts the position of the antenna body 21 by rotating the motor 22 by a predetermined step unit in the Step mode to move the antenna body 21 east or west (step). S312). Then, the measurement unit 103 determines whether the moving direction in which the antenna body 21 is moved is east or west (step S313). When the moving direction in which the antenna main body 21 is moved is determined to be east (step S313: east), the measurement unit 103 adds a value obtained by adding the number of steps rotated by the motor 22 to the total steps stored in the memory 17. A new total step is calculated and stored in the memory 17 (step S314). On the other hand, when the moving direction in which the antenna main body 21 is moved is determined to be west (step S313: west), the measurement unit 103 subtracts the number of steps for rotating the motor 22 from the total steps stored in the memory 17. The calculated value is calculated as a new total step and stored in the memory 17 (step S315). The movement control unit 102 repeats the movement of the antenna body 21 by rotating the motor 22 until the C / N ratio of the signal input to the demodulator 12 becomes good (step S316: No) (step S312 to step S312). S315).

  On the other hand, when it is determined that the C / N ratio of the signal input to the demodulator 12 has been improved (step S316: Yes), the movement control unit 102 includes the motor 22 with the current position of the antenna body 21 as the reception position. It preserve | saves at the memory | storage part 22b (step S317).

  When the reception position of the antenna body 21 is stored in the storage unit 22b of the motor 22, the measurement unit 103 determines whether or not the total time stored in the memory 17 is greater than “0” (step S401). When determining that the total time stored in the memory 17 is greater than “0” (step S401: Yes), the measurement unit 103 determines “east” as the moving direction of the antenna body 21 (step S402). On the other hand, when determining that the total time stored in the memory 17 is smaller than “0” (step S401: No), the measurement unit 103 determines “west” as the moving direction of the antenna body 21 (step S403).

  When the determination of the moving direction is completed, the measuring unit 103 determines whether or not the set pole is vertically polarized (step S404). When determining that the set pole is horizontal polarization (step S404: No), the measurement unit 103 determines whether or not the total step stored in the memory 17 is larger than a preset reference step ( Step S405).

  When it is determined that the set pole is vertical polarization (step S404: Yes) and when the total step is determined to be larger than the reference step (step S405: Yes), the measurement unit 103 calculates the total time. I will do it again.

  Specifically, the movement control unit 102 outputs a command to the control unit 22a included in the motor 22, drives the motor 22 to rotate, and moves the antenna body 21 to the reference position (step S406). The CPU waits for the time (total time + α) obtained by adding the time (α) corresponding to the total step stored in the memory 17 to the total time stored in the memory 17 (step S407). Next, setting section 101 sets the pole (horizontal polarization) and band of the satellite broadcast radio wave received from satellite A (step S408), and selects a channel according to the set pole (horizontal polarization) and band. (Step S409). Further, the measurement unit 103 resets the total time stored in the memory 17 to “0” (step S410).

  Next, the movement control unit 102 outputs a command to the control unit 22a included in the motor 22 to rotate the motor 22 and move the antenna body 21 to the reception position (step S411). While moving the antenna 21 to the receiving position, the measuring unit 103 measures the time during which the antenna body 21 is moving, and adds the time obtained by adding the measured time to the total time stored in the memory 17. The time is calculated (step S412). The measurement unit 103 waits until the demodulator 12 is locked, the level of the signal input to the demodulator 12 is maximum, or the C / N ratio of the signal input to the demodulator 12 is good (step S413).

  When the demodulator 12 is locked, the level of the signal input to the demodulator 12 is maximum, or the C / N ratio of the signal input to the demodulator 12 becomes good (step S413: Yes), or the total When it is determined that the step is equal to or less than the reference step (step S405: No), the measurement unit 103 measures the absolute value of the total time stored in the memory 17 as the movement time (step S414). Then, the measurement unit 103 stores the measured movement time and movement direction in the memory 17 (step S415). The control unit 16 performs the above-described processing for all satellites that receive satellite broadcast radio waves by the satellite antenna 20.

  Next, with reference to FIGS. 5 and 6, the movement process of the antenna body 21 when a channel is selected when viewing satellite broadcasting and the satellite that receives the satellite broadcasting radio waves is changed from satellite B to satellite A. explain. FIG. 5 is a flowchart showing the flow of the moving process of the antenna body when the channel is selected when viewing the satellite broadcast and the satellite receiving the satellite broadcast radio wave is changed from the satellite B to the satellite A. FIG. 6 is a diagram showing an example of movement of the antenna body when a channel is selected when viewing satellite broadcasting and the satellite that receives the satellite broadcasting radio waves is changed from satellite B to satellite A.

  The acquisition unit 104 first acquires the travel time and travel direction (FTIME, FDIR) measured or determined for the satellite B from the memory 17 (step S501). FTIME is a movement time from the reference position to the reception position B where the satellite broadcast radio wave from the satellite B can be received, and FDIR is a movement direction from the reference position to the reception position B. Furthermore, the acquisition unit 104 acquires the travel time and travel direction (TTIME, TDIR) measured or determined for the satellite A from the memory 17 (step S502). TTIME is a moving time from the reference position to the receiving position A where the satellite broadcast radio wave from the satellite A can be received, and TDIR is a moving direction from the reference position to the receiving position A.

  Next, the acquisition unit 104 determines whether or not the movement directions determined for the satellites A and B are equal (step S503). When the movement directions determined for the satellites A and B are equal (step S503: Yes), it is necessary to pass the reference position in the process of moving the antenna body 21 from the reception position B to the reception position A as shown in FIG. Therefore, the acquisition unit 104 acquires a time obtained by subtracting the movement time measured for the satellite A from the movement time measured for the satellite B as a timeout time (step S504).

  On the other hand, if the movement directions determined for the satellites A and B are different (step S503: No), the antenna body 21 passes the reference position in the process of moving from the reception position B to the reception position A as shown in FIG. Therefore, the acquisition unit 104 acquires a time obtained by adding the movement time measured for the satellite A to the movement time measured for the satellite B as a timeout time (step S505).

  When the timeout time is acquired, the setting unit 101 once sets the pole of the satellite broadcast radio wave received from the satellite A to horizontal polarization (step S506), and the movement control unit 102 rotates the motor 22. The antenna body 21 is moved to the reception position A by driving (step S507). In this embodiment, since the moving time is measured when horizontal polarization is set as the polarities of satellite broadcast radio waves received from satellites A and B, the polarities of satellite broadcast radio waves received from satellite A are horizontal. Among the LNB voltages (13V, 18V) applied to the LNB 23 by the LNB controller 15 with respect to the LNB 23, the highest LNB voltage (18V) is applied to the LNB 23. As a result, the speed at which the motor 22 is rotationally driven is increased, and the moving speed of the antenna body 21 is also increased, so that the time required for channel selection can be reduced.

  While the antenna main body 21 is moving to the reception position A, the setting unit 101 waits for a time (timeout time + α) obtained by adding the time required for fine adjustment of the antenna main body 21 to the time-out time acquired in step S505. S508). Meanwhile, the display control unit 105 may display a message as shown in FIG. 7 or 10 on the display unit 14. 7 and 10 are diagrams illustrating examples of messages displayed on the display unit while the antenna is moving.

  Then, after waiting for the timeout time + α, the setting unit 101 sets the pole and band of the satellite broadcast radio wave received from the satellite A (step S509) and resets the tuning time stored in the memory 17 to “0”. (Step S510).

  Next, the setting unit 101 selects a channel for satellite broadcast received from the satellite A according to the set pole and band, and performs tuning (step S511). Meanwhile, the setting unit 101 determines whether or not the demodulator 12 is locked (step S512). When the demodulator 12 is locked (step S512: Yes), the setting unit 101 ends the tuning, and the display control unit 105 inputs the signal demodulated by the demodulator 12 to the decoder 13, and the decoder 13 The decoded digital video signal and digital audio signal are output to the display unit 14.

  When the demodulator 12 is not locked (step S512: No), the setting unit 101 determines whether or not the tuning time stored in the memory 17 is shorter than the preset maximum tuning time (step S513). ). When the tuning time is equal to or longer than the maximum tuning time (step S513: No), the setting unit 101 ends the tuning. Thereafter, the display control unit 105 may display a message as shown in FIG. 8 or 9 on the display unit 14. 8 and 9 are diagrams illustrating an example of a message displayed on the display unit after the timeout time.

  On the other hand, when the tuning time is shorter than the maximum tuning time (step S513: Yes), the setting unit 101 calculates a time obtained by adding a predetermined time to the tuning time as a new tuning time, waits for a predetermined time, It is determined again whether the demodulator 12 is locked (step S514).

  As described above, according to the satellite broadcast receiving system 1 according to the present embodiment, the motor 22 is rotated to move the antenna body 21 from the reference position to the receiving position, and the antenna body 21 moves from the reference position to the receiving position. The movement time required until the antenna body 21 is measured for each satellite that receives the satellite broadcast, and when the satellite that receives the satellite broadcast is changed by the antenna body, the movement time measured for the satellite before the change and The time-out time required for the movement of the antenna body 21 from the movement time measured for the changed satellite to the reception position where the satellite broadcast can be received from the changed satellite from the reception position where the satellite broadcast can be received from the satellite before the change. If the satellite broadcast of the channel selected by the user cannot be received, the antenna body 21 can be moved. Since there is no need to wait for the hunt longest time-out period, it is possible to shorten the time-out period at the time of channel selection.

(Second Embodiment)
In the present embodiment, when the satellite antenna is moved to the reference position at the time of setting up the receiving apparatus, the pole where the LNB voltage applied to the LNB by the LNB controller is the highest among the poles of radio waves received from the satellite. Is an example of setting. In the following description, description of the same parts as in the first embodiment will be omitted, and only different parts from the first embodiment will be described.

  The setting unit 101 sets the polarities of the satellite broadcast radio waves received from the satellites A and B to horizontal polarization when the antenna body 21 is moved to the reference position during setup of the receiving device 10. As a result, the LNB voltage applied to the LNB 23 by the LNB controller 15 becomes the highest LNB voltage among the LNB voltages applied to the LNB 23, and the rotational speed of the motor 22 is increased, so that the reference position of the antenna body 21 is reached. The time required for the movement of can be shortened. Then, after the antenna body 21 moves to the reference position, the setting unit 101 resets the poles of the satellite broadcast radio waves received from the satellites A and B and the satellite broadcast bands received from the satellites A and B.

  When setting up the receiving apparatus 10, the movement control unit 102 first rotates the motor 22 to move the antenna body 21 to the reference position. Next, the movement control unit 102 rotates the motor 22 in the Step mode to move the antenna body 21 from the reference position to the reception position. When the demodulator 12 is locked and the C / N ratio of the signal input to the demodulator 12 becomes good, the movement control unit 102 stores the storage unit included in the motor 22 as the reception position of the antenna body 21. 22b.

  In the present embodiment, the movement control unit 102 rotates the motor 22 to move the antenna body 21 to the reference position once during the setup of the receiving device 10. However, the movement control unit 102 has already received the signal in the storage unit 22 b of the motor 22. When the position is stored, the reception position may be used as the start position, and the antenna main body 21 may be moved from the start position to another reception position. Accordingly, it is not necessary to move the antenna body 21 to the reference position every time the total step is calculated, so that the time required for calculating the total step can be shortened.

  The measurement unit 103 resets the total steps stored in the memory 17 at the time of setup of the receiving apparatus 10 and before the movement of the antenna body 21 to the reception position is started. In addition, when the movement of the antenna main body 21 is started from the reception position already stored in the storage unit 22b of the motor 22, the total steps required for the movement to the reception position already stored in the storage unit 22b of the motor 22 Is the total step.

  Then, as in the first embodiment, the measurement unit 103 adds / subtracts the number of steps that the motor 22 rotates while the motor 22 rotates in Step mode to the total steps. Is calculated as a total step.

  When the channel is selected during viewing of the satellite broadcast and the satellite that receives the radio wave of the satellite broadcast is changed, the acquisition unit 104 calculates the total step and moving direction calculated for the satellite before the change from the memory 17, and after the change. The total steps and movement directions calculated for the other satellites (other satellites) are acquired. Then, the acquisition unit 104 can receive satellite broadcasting from the satellite before the change from the total step and movement direction calculated for the satellite before the change and the total step and movement direction calculated for the satellite after the change (other satellites). The number of movement steps required to move the antenna main body 21 from the new reception position to the reception position where the satellite broadcast can be received from the changed satellite is calculated.

  Specifically, the acquisition unit 104 determines whether or not the movement directions determined for the satellite before the change and the satellite after the change are the same. When the moving directions determined for the satellite before the change and the satellite after the change are the same, the acquisition unit 104 subtracts the total step calculated for the satellite after the change from the total step calculated for the satellite before the change The number is calculated as the number of movement steps. Furthermore, the acquisition unit 104 acquires a time obtained by multiplying the calculated number of movement steps by a time corresponding to one step of the motor 22 as a timeout time.

  On the other hand, when the moving direction determined for each of the satellite before the change and the satellite after the change is different, the acquisition unit 104 calculates the calculated satellite for the satellite after the change in the calculated total step. The number of steps obtained by adding the total steps is calculated as the number of movement steps. Then, the acquisition unit 104 acquires a time obtained by multiplying the calculated number of movement steps by a time corresponding to one step of the motor 22 as a timeout time.

  In the present embodiment, since the time corresponding to one step of the motor 22 is a constant, the time-out time to be acquired varies depending on the characteristics of the motor 22 and the like. However, in the present embodiment, the time-out time can be obtained from the number of steps required for movement by rotating the motor 22 in the Step mode during the setup of the receiving device 10, and therefore, compared with the first embodiment. Travel time can be measured with relatively simple control.

  Next, the measurement process of the movement time and movement direction at the time of setup of the receiving apparatus 10 will be described with reference to FIG. FIG. 11 is a flowchart showing a flow of measurement processing of the movement time and movement direction at the time of setup of the receiving apparatus.

  First, the setting unit 101 sets the polarities of satellite broadcast radio waves to horizontally polarized waves (step S1101). Next, the movement control unit 102 outputs a command to the control unit 22a included in the motor 22 to rotationally drive the motor 22 to move the antenna body 21 to the reference position (step S1102). The measurement unit 103 waits for the antenna body 21 to move to the reference position and resets the total step (steps S1103 and S1104). Further, the setting unit 101 sets the pole of the satellite broadcast radio wave received from the satellite A and the band of the satellite broadcast received from the satellite A (step S1105), and selects a channel according to the set pole and band. (Step S1106).

  Next, the movement control unit 102 rotates the motor 22 in the Step mode to move the antenna body 21 to the east or west (step S1107). While the antenna body 21 is moving, the measurement unit 103 determines whether the moving direction of the antenna body 21 is east or west (step S1108). When it is determined that the antenna body 21 has moved to the east (step S1108: east), the measurement unit 103 calculates a value obtained by adding the number of steps rotated by the motor 22 to the total step as a new total step, Save in the memory 17 (step S1109). When it is determined that the antenna body 21 has moved to the west (step S1108: west), the measurement unit 103 calculates a value obtained by subtracting the number of steps driven by the motor 22 from the total step as a new total step, Save in the memory 17 (step S1110).

  When the demodulator 12 is locked while the antenna body 21 is moved and the C / N ratio of the signal input to the demodulator 12 becomes good (step S1111: Yes, step S1112: Yes), The movement control unit 102 stops the rotation drive of the motor 22 and stores the current position of the antenna body 21 as a reception position in the storage unit 22b included in the motor 22 (step S1113).

  When the reception position of the antenna body 21 is stored in the storage unit 22b of the motor 22, the measurement unit 103 determines whether the total step stored in the memory 17 is greater than “0” (step S1114). When it is determined that the total step stored in the memory 17 is greater than “0” (step S1114: Yes), the measurement unit 103 determines “east” as the moving direction of the antenna body 21 (step S1115). On the other hand, when it is determined that the total step stored in the memory 17 is smaller than “0” (step S1114: No), the measurement unit 103 determines “west” as the moving direction of the antenna body 21 (step S1116).

  When the determination of the moving direction is completed, the measuring unit 103 stores the calculated total step and the determined moving direction in the memory 17 (step S1117). The control unit 16 performs the above-described processing for all satellites that receive satellite broadcast radio waves by the satellite antenna 20.

  Next, with reference to FIG. 12, a description will be given of the movement process of the antenna body 21 when a channel is selected during viewing of satellite broadcast and the satellite that receives the satellite broadcast radio wave is changed from satellite B to satellite A. FIG. 12 is a flowchart showing the flow of the moving process of the antenna body when the channel is selected when viewing the satellite broadcast and the satellite that receives the satellite broadcast radio wave is changed from the satellite B to the satellite A.

  The acquisition unit 104 first acquires the total step and the moving direction (Fstep, FDIR) calculated or determined for the satellite B from the memory 17 (step S1201). Note that Fstep is the number of steps from the reference position to the reception position B where the satellite broadcast radio wave from the satellite B can be received, and FDIR is the moving direction from the reference position to the reception position B. Furthermore, the acquiring unit 104 acquires the total step and moving direction (Tstep, TDIR) calculated or determined for the satellite A from the memory 17 (step S1202). Tstep is the number of steps from the reference position to the reception position A where the satellite broadcast radio wave from the satellite A can be received, and TDIR is the moving direction from the reference position to the reception position A.

  Next, the acquiring unit 104 determines whether or not the movement directions determined for the satellites A and B are equal (step S1203). When the movement directions determined for the satellites A and B are the same (step S1203: Yes), it is necessary to pass the reference position in the process of moving the antenna body 21 from the reception position B to the reception position A as shown in FIG. Therefore, the acquisition unit 104 calculates the moving step number obtained by subtracting the total step calculated for the satellite A from the total step calculated for the satellite B, and sets the moving step number to one step of the motor 22. The time obtained by multiplying the corresponding time is acquired as the timeout time (step S1204).

  On the other hand, when the moving directions determined for the satellites A and B are different (step S1203: No), the antenna body 21 passes the reference position in the process of moving from the receiving position B to the receiving position A as shown in FIG. Therefore, the acquisition unit 104 calculates the moving step number obtained by adding the total step calculated for the satellite A to the total step calculated for the satellite B, and the motor 22 The time obtained by multiplying the time corresponding to one step is acquired as the timeout time (step S1205).

  When the timeout time is acquired, the setting unit 101 temporarily sets the pole of the satellite broadcast radio wave received from the satellite A to horizontal polarization (step S1206), and the movement control unit 102 rotates the motor 22. The antenna body 21 is moved to the reception position A by driving (step S1207). In this embodiment, since the measurement unit 103 calculates the total steps required to move to the reception position of each satellite, the pole of the satellite broadcast radio wave received from the satellite A is set to horizontal polarization, and the LNB controller Among the LNB voltages (13V, 18V) 15 applied to the LNB 23 with respect to the LNB 23, the highest LNB voltage (18V) is applied to the LNB 23. As a result, the speed at which the motor 22 is rotationally driven is increased, and the moving speed of the antenna body 21 is also increased, so that the time required for channel selection can be reduced.

  While the antenna main body 21 is moving to the reception position A, the setting unit 101 waits for a time (timeout time + α) obtained by adding the time required for fine adjustment of the antenna main body 21 to the time-out time acquired in step S1205. S1208). Meanwhile, the display control unit 105 may display a message as shown in FIG. 7 or 10 on the display unit 14 as in the first embodiment.

  After waiting for the timeout time + α, the setting unit 101 sets the pole and band of the satellite broadcast radio wave received from the satellite A (step S1209), and resets the tuning time stored in the memory 17 to “0”. (Step S1210).

  Next, the setting unit 101 selects a channel of a satellite broadcast received from the satellite A according to the set pole and band, and performs tuning (step S1211). Meanwhile, the setting unit 101 determines whether or not the demodulator 12 is locked (step S1212). When the demodulator 12 is locked (step S1212: Yes), the display control unit 105 inputs the signal demodulated by the demodulator 12 to the decoder 13, and the digital video signal and the digital video signal subjected to the TS decoding process in the decoder 13 The audio signal is output to the display unit 14.

  If the demodulator 12 is not locked (step S1212: No), the setting unit 101 determines whether or not the tuning time stored in the memory 17 is shorter than a preset maximum tuning time (step S1213). ). If the tuning time is equal to or greater than the maximum tuning time (step S1213: No), the setting unit 101 determines that the satellite broadcast of the selected channel cannot be received from the satellite A, and ends the process. Thereafter, the display control unit 105 may display a message as shown in FIG. 8 or FIG. 9 on the display unit 14 as in the first embodiment.

  On the other hand, when the tuning time is shorter than the maximum tuning time (step S1213: Yes), the setting unit 101 calculates a time obtained by adding the predetermined time to the tuning time as a new tuning time, waits for the predetermined time, and then again Then, it is determined whether or not the demodulator 12 is locked (step S1214).

  As described above, according to the satellite broadcast receiving system 1 according to the present embodiment, when the satellite antenna 20 is moved to the reference position at the time of setting up the receiving device 10, the LNB controller among the poles of satellite broadcast radio waves received from the satellite By setting the pole at which the LNB voltage applied to the LNB 23 becomes the highest by 15, the LNB voltage applied to the LNB 23 by the LNB controller 15 becomes the highest LNB voltage among the LNB voltages applied to the LNB 23. At the same time, since the rotation speed of the motor 22 is increased, the time required to move the antenna body 21 to the reference position can be shortened.

  As described above, according to the first and second embodiments, the time-out time required for channel selection can be reduced.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, the constituent elements over different embodiments may be appropriately combined.

DESCRIPTION OF SYMBOLS 1 Satellite broadcast reception system 10 Receiving device 14 Display part 15 LNB controller 16 Control part 17 Memory 20 Satellite antenna 21 Antenna main body 22 Motor 23 LNB
101 Setting unit 102 Movement control unit 103 Measurement unit 104 Acquisition unit 105 Display control unit

Claims (9)

A moving control means for moving the antenna from a reference position to the receiving position by controlling a moving means for moving the antenna to a receiving position where the satellite broadcast can be received according to a change in the satellite to be received;
Measuring means for measuring a moving time required for the antenna to move from the reference position to the receiving position for each satellite received by the antenna;
When the satellite received by the antenna is changed to another satellite, the movement time measured for the satellite before the change and the movement time measured for the other satellite are calculated from the reception position of the satellite before the change. An acquisition means for acquiring a time-out period required for moving the antenna to a reception position of another satellite;
An antenna control device comprising:   2. The display control unit according to claim 1, further comprising a display control unit configured to display a timeout time acquired by the acquisition unit on a display unit while the satellite received by the antenna is changed and the antenna is moved. Antenna control device. Setting means for setting the poles of satellite broadcast radio waves;
For a switching device that switches the pole of the satellite broadcast radio wave received by the antenna according to the applied voltage, the switching device further comprises an applying means for applying a voltage according to the pole set by the setting means,
The moving means increases the moving speed of the antenna in response to an increase in voltage applied to the switching device,
3. The measurement unit according to claim 1, wherein the measuring unit measures the travel time when the highest voltage is applied among the voltages applied to the switching device by the applying unit. Antenna control device.   When the satellite received by the antenna is changed and the antenna is moved to the receiving position, the setting means determines a voltage applied to the switching device by the applying means among the poles of radio waves of satellite broadcasting. The antenna control apparatus according to claim 3, wherein the highest pole is set.   When the antenna is moved to the reference position, the setting means sets a pole where the voltage applied to the switching device by the applying means is highest among the poles of radio waves of satellite broadcasting. The antenna control device according to claim 3 or 4.   The movement control means uses any one of the reception positions of the antenna as the reference position, and moves the antenna from the reception position used as the reference position to another reception position. The antenna control device according to any one of claims 1 to 5. The measuring means further measures a moving direction in which the antenna has moved from the reference position to the receiving position for each satellite from which the antenna receives a satellite broadcast,
When the satellite received by the antenna is changed to another satellite, the acquisition means is the movement time and movement direction measured for the satellite before the change and the movement time and movement direction measured for the other satellite. The antenna control according to any one of claims 1 to 5, wherein a time-out period required for the movement of the antenna from the reception position of the satellite before the change to the reception position of the other satellite is acquired from apparatus. An antenna control method executed by an antenna control device,
The antenna control device includes a control unit and a storage unit,
The controller is
A step of moving the antenna from a reference position to the receiving position by controlling a moving means for moving the antenna to a receiving position capable of receiving a satellite broadcast in accordance with a change in a satellite to be received; and
A step of measuring a moving time required for the antenna to move from the reference position to the receiving position for each satellite received by the antenna;
When the satellite that the antenna receives is changed to another satellite, the acquisition means calculates the satellite of the pre-change satellite from the movement time measured for the satellite before the change and the movement time measured for the other satellite. Obtaining a time-out period required for movement of the antenna from a receiving position to a receiving position of the other satellite;
An antenna control method comprising: Setting means for setting the pole of the satellite broadcast radio wave received by the antenna;
Applying means for applying a voltage according to the set pole for a switching device that switches the pole of a satellite broadcast radio wave received by the antenna according to the applied voltage;
Moving the antenna to a receiving position where satellite broadcasting can be received in response to a change in the satellite to be received, and moving to increase the speed of moving the antenna in response to an increase in voltage applied to the switching device Movement control means for controlling the means to move the antenna from a reference position to the reception position;
Measuring means for measuring a moving time required for the antenna to move from the reference position to the receiving position for each satellite received by the antenna;
When the satellite received by the antenna is changed to another satellite, the movement time measured for the satellite before the change and the movement time measured for the other satellite are calculated from the reception position of the satellite before the change. Obtaining means for obtaining a time-out time required for moving the antenna to a reception position of another satellite,
When the antenna is moved to the reference position, the setting means sets a pole where the voltage applied to the switching device by the applying means is highest among the poles of radio waves of satellite broadcasting. An antenna control device.

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