JP2591865Y2 - Rotation speed switching circuit of rotary antenna - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary antenna for receiving satellite broadcasting.

[0002]

2. Description of the Related Art Conventionally, it has been necessary to adjust the elevation angle and the azimuth angle of an installed antenna in order to install a rotating antenna and receive broadcasts from respective satellites. After adjusting the parabolic antenna to the south,
Rotate in the east or west direction until the rotation angle pointer matches the specified scale in the rotation angle table (a table in which angles fixed for each satellite are entered) so that the amplitude of the C / N checker's meter fluctuates to the maximum. The azimuth is adjusted by rotating the entire antenna, and the elevation angle adjustment rod is finely adjusted to adjust the elevation angle so that the amplitude of the meter swings to the maximum. When the adjustment is completed, select the next satellite and follow the same procedure as above to
Repeat until the amplitude of the / N checker meter is similar to that of the satellite. In this way, it is determined that all the satellites to be received are on the trajectory of the antenna driver trace.
Check with the meter of N checker. Although the angle of the antenna is adjusted by the above method, the level of the C / N checker must be measured while repeating the adjustment of the azimuth and the elevation for each satellite, which is very troublesome. In addition, since the speed of the motor to be driven when driving the antenna is constant, there is a problem that the speed of the motor cannot be reduced when fine adjustment of the angle is performed.

[0003]

As described above, in the conventional antenna adjustment method, it was necessary to repeat the azimuth adjustment and the elevation angle adjustment for each satellite. Since the speed and the rotation direction could not be changed, there was a problem that the fine adjustment was troublesome. It is an object of the present invention to solve the above-mentioned problems and to provide a device capable of changing the speed and the rotation direction of an antenna driving motor in adjusting the angle of an antenna.

[0004]

According to the present invention, a first output terminal for outputting a first voltage on a secondary side of a transformer is connected to a first terminal of a first relay. The second output terminal for outputting the second voltage on the secondary side of
A second terminal of the relay is connected, a movable contact of the first relay is connected to one input terminal of the rectifier circuit, and a third output terminal on the secondary side of the transformer is connected to the other input terminal of the rectifier circuit. The first relay is switched to change the rotation speed of the motor, and one output of the rectifier circuit is switched to the second output.
A first terminal of the relay is connected to a first terminal of the third relay, and the other output of the rectifier circuit is connected to a second terminal of the second relay and a second terminal of the third relay. Each of the drive contacts of the three relays is connected to a motor,
The rotation direction of the motor is changed by switching the relay and the third relay.

[0005]

As described above, according to the rotary antenna speed switching circuit of the rotary antenna according to the present invention, the rotation speed and the rotation direction of the antenna driving motor can be switched.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of a rotary shaft speed switching circuit of a rotary antenna according to the present invention will be described in detail. In the embodiment shown in FIG.
For the main power supply for driving
The output terminal 4 on the next side is connected to one input side of the rectifier circuit 7. A first output terminal 5 on the secondary side of the transformer 3 is connected to a first terminal of a first relay 8.
The second output terminal 6 on the next side is connected to the second terminal 1 of the first relay 8.
1 and the movable contact 10 of the relay 8 is connected to the other input side of the rectifier circuit 6. One output of the rectifier circuit 7 is connected to the first terminals 13 and 17 of the second relay 12 and the third relay 16 respectively, and the other output of the rectifier circuit 7 is connected to the second relay 12 and the third relay 16. Connected to respective second terminals 15 and 19. The movable contact of the second relay is connected to one power terminal of the motor, and the movable contact of the third relay is connected to the other power terminal of the motor. One relay driving contact of each of the first, second, and third relays is connected to a relay driving power supply 20, and the other relay driving contacts are individually connected to relay control terminals 21, 22, and 23, respectively. Configured to connect.

Next, the operation of the rotation axis speed switching circuit of the rotary antenna according to the present invention will be described. In FIG. 1, a secondary output terminal 4 of a transformer 3 is connected to one input side of a rectifier circuit 6 and a secondary output terminal 5 of the transformer 3 is connected.
Is connected to the first terminal 9 of the first relay 8 and the transformer 3
The tap terminal 6 on the secondary side of the second terminal 11 of the relay 8
, For example, the first terminal 9 of the first relay 8 has a higher voltage than the second terminal 11. Therefore, when the movable contact 10 of the first relay 8 is switched to the first terminal 9 side, the output voltage of the rectifier circuit 7 increases, and the rotation speed of the motor 2 increases. The movable contact 10 of the first relay 8 is connected to the second terminal 11
, The output voltage of the rectifier circuit 7 decreases, and the rotation speed of the motor 2 decreases. When the contact of the second relay 12 is set to the first terminal 13 and the third relay 16 is set to the second terminal 19, for example, if the motor rotates clockwise, the reverse is true. When the second relay 12 is switched to the second terminal 15 and the third relay 16 is switched to the second terminal 17, the motor rotates counterclockwise. Further, when the contact of the second relay 12 is on the first terminal 13 side, the third relay 16
Is on the side of the first terminal 17, the two poles of the motor have the same voltage and do not rotate. FIG. 2 shows the first, second, and third
When the control terminals 21, 22, and 23 of the relay driving contacts of the relays 8, 12, and 16 are A, B, and C, respectively, when the control terminals A, B, and C are open, "H" is set. And a truth table showing the operation of the motor when the grounding is represented by “L”. In the figure, for example, the states indicated by 41, 44, 45, and 48 are B,
Since both C voltage levels are open or ground,
Depending on their state, the contact of the second relay is the first terminal 1
3 or the second terminal 15 and the third relay 16
Is located on the side of the first terminal 17 or the side of the second terminal 19, so that both poles of the motor have the same voltage and do not rotate. In the states 42 and 43 when A is open, the output voltage of the rectifier circuit 7 increases and the rotation speed of the motor 2 increases because the movable contact 10 of the first relay 8 is on the first terminal 9 side. . However, in the state 42, the control contact B is open and C
Is grounded, the motor rotates in the direction opposite to that in the case of 43. In the states 46 and 47 where A is grounded, the lower tap output on the secondary side of the transformer 3 is input to the rectifier circuit 7 because the movable contact 10 of the first relay 8 is on the side of the second terminal 11. The output voltage of the motor 2
Rotation speed becomes slow. However, the state 46 is the control contact B
Is open and C is grounded, the motor rotates in the opposite direction to that in the case of 47.

[0008]

As described above, according to the rotary shaft speed switching circuit of the rotary antenna according to the present invention, the magnitude and polarity of the voltage applied to the motor are controlled by the control terminals A, B, and C.
Can be changed according to the control voltage level applied to the motor, so that the rotation speed and rotation direction of the motor can be controlled, and it is easy to make fine adjustments to rotate the antenna and accurately position the antenna.

[0009]

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a rotation axis speed switching circuit of a rotary antenna according to the present invention.

FIG. 2 is a diagram illustrating the operation of the rotation axis speed switching circuit of the rotary antenna according to the present invention.

[Explanation of symbols]

 1 outlet 2 motor 3 transformer 4 output terminal 5 output terminal 6 output terminal 7 rectifier circuit 8 relay 9 terminal 10 movable contact 11 terminal 12 relay 13 terminal 14 movable contact 15 terminal 16 relay 17 terminal 18 movable contact 19 terminal 20 power supply 21 control terminal 22 Control terminal 23 Control terminal

Claims (1)

(57) [Scope of request for utility model registration] A first output terminal for outputting a first voltage on a secondary side of a transformer is connected to a first terminal of a first relay, and a second output terminal for outputting a second voltage on a secondary side of the transformer. Is connected to the second terminal of the first relay, the movable contact of the first relay is connected to one input terminal of the rectifier circuit, and the third output terminal on the secondary side of the transformer is connected to the other terminal of the rectifier circuit. Connecting to an input terminal, changing the rotation speed of the motor by switching the first relay, and connecting one output of the rectifier circuit to a first terminal of a second relay and a first terminal of a third relay; The other output of the rectifier circuit is connected to the second terminal of the second relay and the second terminal of the third relay, and each of the movable contacts of the second relay and the third relay is connected to the motor;
By changing the rotation direction of the motor by switching the second relay and the third relay, a rotary antenna for receiving satellite broadcasting is provided.
Make fine adjustments by changing the rotation speed and direction of the
Reliable antenna pointing to the desired satellite
Speed switching circuit of the rotary antenna, characterized in that the the like.