JPH0535603Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic antenna pointing device that is suitably used for on-site television reporting.

Handheld cameras are widely used in sports and news broadcasts.

In order to form a reporting system in which a transmitting antenna is provided on the reporter's side and the relay antenna transmits data to a sending station, the transmitting antenna on the reporter's side must always be directed toward the relay antenna.

For this reason, conventional methods have been adopted in which two people work together, with one person operating the camera and the other pointing the transmitting antenna at the relay antenna.

An object of the present invention is to provide an automatic antenna pointing device that is suitably used for on-site television reporting.

In order to achieve the above object, the antenna automatic pointing device according to the present invention includes a coaxial rotary joint, a directional antenna integrally provided on a rotating part of the coaxial rotary joint, and a directional antenna that drives the rotating part of the coaxial rotary joint. The antenna includes a motor that detects the rotation of the rotary joint, a receiver that detects rotation of the rotary joint, is supported by a substrate structure, a servo circuit that connects the receiver and the motor, and that directs the attitude of the antenna in a fixed direction using a gyroscope. In the automatic pointing device, the board structure has an upper and lower board structure, and a fixed part of the coaxial rotary joint to which a signal from a relay transmitter is connected via a coaxial cable is fixed to the lower board, A rotating part integrally provided with a directional antenna is rotatably supported by the upper board, a gear is provided on the outer periphery of the rotating part of the rotary joint, the motor is fixed to the upper board, and its main body is An output shaft gear located between the boards is coupled to the gear, the receiver is fixed to the upper board, and a main body is located between the boards and an input gear is coupled to the gear.

Hereinafter, the present invention will be explained in more detail with reference to the drawings and the like.

FIG. 1 is a schematic diagram for explaining the outline of a news gathering system using an automatic antenna pointing device according to the present invention.

An antenna 30 for relay reception is placed at a predetermined position on a tripod or the like, and this antenna 30 is directed toward the cameraman by another person.

A support 23 is fixed to a backpack carried by a cameraman, and a transmitter 20 is fixed to the tip of the support.

The backpack is further equipped with a power source 26, a camera 22, etc., and the cameraman can carry the backpack on his back and carry the television camera 21 on his shoulder, allowing him to move freely.

The signal from the television camera 21 is guided to a relay transmitter 27, and its output is sent to a coaxial cable 2.
The signal from the gyro 22 is transmitted to the transmitter 20 by a cable.

FIG. 2 is a partial sectional view showing the transmitting part in detail.

A joint portion 4 of an electromagnetic horn 6 is supported by a bearing 8 on the substrate 11 so as to be rotatable through 360°. A DC motor 1 is fixed to this board 11, and the DC
A gear 10 is fixed to the output shaft of the motor 1. This gear 10 is coupled to a gear 9 fixed to the joint portion 4 of the electromagnetic horn 6.

Furthermore, a synchro receiver 3 is fixed to this board 11. A gear 12 fixed to the shaft of the synchro receiver 3 is coupled to a gear 9 fixed to the joint portion 4 of the electromagnetic horn 6.

A rotary joint 2 is fixed to a substrate 15 disposed below the substrate 11, and the upper end of the rotary joint 2 is coupled to the lower end of the joint portion 4 of the electromagnetic horn 6.

A coaxial cable from the television camera shown in FIG. 1 is connected to the lower end of the rotary joint 2.

A receptacle 17 fixed to the substrate 11 forms a connection for receiving a power supply and a signal from the gyroscope 22.

A resin radome 7 that transmits radio waves is fixed to the upper part of the substrate 11, and protects the electromagnetic horn 6 and gear parts from the outside air.

FIG. 3 is a block diagram showing an embodiment of the circuit of the automatic antenna pointing device according to the present invention.

The directional dial 22 and the synchro transmitter 42 constitute a directional dial.

The gyro 22 is connected to a 400 Hz square wave from a power supply circuit 26 and is rotated at approximately 20,000 rpm.
A 400Hz sine wave is connected to the synchro oscillator 42. The output of the synchro oscillator 42 is connected to the synchro receiver 3 via the differential synchro 41.

A servo circuit 40 consisting of a preamplifier and a servo amplifier is connected between the synchro receiver 3 and the DC motor 1 and drives the antenna 6.

First, rotate the gyro 22 at the relay site, and use the initial setting knob 44 related to the differential synchronizer 41 to set the initial antenna direction to the relay antenna 3.
If the direction is set to 0 (see FIG. 1), the antenna 6 will always be oriented in the same direction (the direction of the antenna 30) even if the cameraman moves. The direction of the antenna 6 can be displayed by an antenna position indicator 43 connected to the differential synchronizer 41.

FIG. 4 is a block diagram showing still another embodiment of the circuit of the automatic antenna pointing device according to the present invention. In this embodiment, a rate gyro that outputs angular velocity information is used as the gyro 50.
The power supply circuit 60 includes a gyro 50 and an angle oscillator 55.
It supplies operating power to the circuit with a 400Hz sine wave.

At the time of initial setting, the initial setting switch 51 forms a loop of the motor 1, the angle oscillator 55, the angle receiver 57, the preamplifier 58, the motor drive amplifier 53, and the motor 1.

The motor 1 includes an angle oscillator 55 and an angle receiver 57.
A drive output corresponding to the difference in output is applied, and the drive is performed so that this difference becomes zero.

The initial setting knob 59 is a knob for adjusting the axis of the angle receiver 57. When the support of the antenna position indicator 56 becomes zero, the antenna 6 is oriented in a predetermined direction and the initial setting is completed.

During operation, the output of the rate gyro 50 is connected to the integrator 52 by the initial setting switch 51, and the integrator 52, motor drive amplifier 53,
A loop of motor 1, tachometer 54, and integrator 52 is formed.

The integrator 52 is a circuit that integrates and outputs the difference between the signals connected to its input terminals, and the motor 1 is driven so that its output becomes zero, so that the antenna 6 is always directed in a fixed direction.

Various modifications can be made to the embodiments described in detail above within the scope of the present invention.

In the above embodiment, the gyro and antenna are installed separately, but it is also possible to mount the gyro on the same stand as the antenna.

Further, in the embodiments described above, a gear is shown as a rotation transmission device, but it is also possible to use a rotation transmission device that functions in the same way as the gear, such as a rubber roller.

Since the antenna automatic pointing device according to the present invention is configured as described above, it is possible to significantly improve the degree of freedom of reporting activities at relay sites.

Therefore, the conventional work in which two people work in pairs becomes unnecessary.

Next, since the automatic antenna pointing device according to the present invention is compact and compact, it can be integrated into a backpack as shown in the embodiment.
The mobility of reporting can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram illustrating the use of an automatic antenna pointing device according to the present invention. FIG. 2 is a partially sectional view showing an embodiment of the mechanism of the transmitter.
FIG. 3 is a block diagram showing an embodiment of the circuit of the automatic antenna pointing device according to the present invention. FIG. 4 is a block diagram showing still another embodiment of the circuit of the automatic antenna pointing device according to the present invention. 1...DC motor, 2...Rotary joint,
3... Synchro, 4... Joint, 5... Bracket, 6... Electromagnetic horn, 7... Radome, 8
... Bearing, 9 ... Gear, 10 ... Pinion gear, 11 ... Board, 12 ... Gear, 15 ... Board, 16 ... Cover, 17 ... Receptacle, 2
0... Transmission unit, 21... Television camera, 2
2... Direction gyroscope, 23... Support, 24... Power signal line, 25... Coaxial cable, 26... Power supply (power supply circuit), 27... Relay transmitter, 30... Relay antenna, 31... Tripod, 40... Servo circuit, 41... Differential synchronizer, 42... Synchro transmitter, 43... Antenna position indicator, 44... Initial setting knob, 50... Rate dial, 51...
...Initial setting switch, 52...Integrator, 53...
Amplifier, 54...Tachometer, 55...Angle oscillator, 56...Antenna position indicator, 57...Angle receiver, 58...Amplifier, 59...Initial setting knob, 60...Power source (power supply circuit).

Claims (1)

[Claims for Utility Model Registration] (1) A coaxial rotary joint, a directional antenna provided integrally with the rotating part of the coaxial rotary joint, a motor that drives the rotating part of the coaxial rotary joint, a motor that drives the rotating part of the coaxial rotary joint, In the antenna automatic pointing device, a receiver for detecting the rotation of the point is supported by a substrate structure, and has a servo circuit connecting the receiver and the motor, and directs the attitude of the antenna in a fixed direction using a gyro. The board structure is a two-stage board structure, upper and lower, and the fixed part of the coaxial rotary joint to which the signal from the relay transmitter is connected via a coaxial cable is fixed to the lower board, and the directional antenna is integrated. The provided rotating section is rotatably supported by the upper substrate, a gear is provided on the outer periphery of the rotating section of the rotary joint, the motor is fixed to the upper substrate, and its main body is located between the substrates and has an output. An automatic antenna pointing device characterized in that a shaft gear is coupled to the gear, the receiver is fixed to an upper board, the main body is between the boards, and an input gear is coupled to the gear. (2) The antenna automatic pointing device according to claim 1, wherein the directional antenna is an electromagnetic horn. (3) The antenna automatic pointing device according to claim 1, wherein the gyroscope is an azimuth gyroscope. (4) The automatic antenna pointing device according to claim 1, wherein the gyro is a rate gyro.