JPH02309802A - Detector for antenna reference direction - Google Patents

Abstract

PURPOSE:To simply confirm the mechanical azimuth reference of a reflecting plate with the operator at a parted location by providing an optical sensor detecting a shaft mounted to the reflecting plate. CONSTITUTION:An optical sensor main body 1 consists of a light emitting element section 2, a photodetector section 3 a board 4 and a bracket 5 and is fitted to a slit 7 of an upper face of a pedestal 6. On the other hand, a shaft 10 prolonged in the same direction as a mechanical azimuth reference line 9 of the reflecting plate is fitted to the reflecting plate 8. Then the reflecting plate 8 is turned to allow the shaft 10 to pass through in the optical sensor main body 1 and ON-OFF operation is given to the photodetector section 3 of the optical sensor. The ON-OFF operation directs the state when an installation reference line 12 of the antenna and the mechanical azimuth reference line 9 of the reflecting plate are made in the same direction, the signal is converted into a voltage signal with the board 4 and transferred to the operator. Thus, the parallel location between the mechanical azimuth reference 9 of the reflecting plate 8 and the antenna installing reference 12 is confirmed by the operator at a parted location.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for detecting a mechanical azimuth reference of a reflector provided in an antenna, and in particular, a device for detecting a mechanical azimuth reference of a rotating reflector via an optical sensor. The present invention relates to an azimuth reference detection device that detects electrical signals.

[Prior Art] Since the mechanical azimuth reference of the reflector of a ship-mounted antenna needs to be set parallel to the installation reference of the antenna, it is necessary to confirm that these references match. For this reason, in the past, an installation reference mark was attached to the antenna pedestal, a pointer was attached to the rotation shaft of the pedestal, and when the mechanical azimuth reference line of the reflector attached to the rotation shaft became parallel to the antenna installation reference line, The structure was such that the pointer on the rotating shaft coincided with the reference mark on the fixed side of the pedestal, and the mechanical direction reference of the reflector was detected by visually checking this pointer.

[Problems to be Solved by the Invention] In the conventional detection work of the mechanical orientation reference of the reflector, the attachment of the reflector to the pedestal requires accuracy, and the attachment of the pointer to the rotating shaft of the pedestal requires accuracy and fixation. It was necessary to assemble the side reference marks while specifying their accuracy individually, and it took a lot of time to assemble the antenna. Furthermore, when confirming that the pointer on the rotating shaft and the stationary reference mark match, the operator visually confirms the agreement, so there is a possibility that measurements may vary depending on the operator. Generally speaking, in order to check this guideline, it was necessary to remove the inspection window on the pedestal, which was extremely dangerous work for the antenna installed at the top of a ship's mast. In addition, it is necessary to check the electrical performance of the antenna while checking with the guide inside the pedestal that the mechanical orientation reference of the reflector and the installation reference line of the antenna match. This required complicated coordination work between the operator and the operator who was checking the information while updating each other.

The present invention has been made in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide an antenna azimuth reference detection device that reasonably solves the above-mentioned problems.

[Means and effects for solving the problems] An antenna azimuth reference detection device according to the present invention is a device for detecting an azimuth reference of a rotating reflector provided in an antenna, and includes a shaft attached to the reflector. and an optical sensor that detects passage of the shaft when the azimuth reference direction of the reflector and the azimuth reference direction of the antenna become parallel. A preferred embodiment of the present invention includes a main body in which a light emitting part, a light receiving part, and a substrate of an optical sensor are attached to a U-shaped bracket, and a shaft attached to a reflector in the same direction as its mechanical azimuth reference direction. However, there is a slit on the top surface of the pedestal that was machined at the same time as the pedestal installation reference mark, and the optical sensor body can be attached to this slit. The main body of the optical sensor is attached to the slit on the top surface of the pedestal, and its position is such that when the mechanical azimuth reference of the reflector and the installation reference of the antenna become parallel due to the rotation of the reflector, the shaft attached to the reflector will be exposed to light. It is positioned so as to pass between the light emitting part and the light receiving part of the sensor body. Therefore, the shaft attached to the reflector passes through the main body of the optical sensor once every time the reflector rotates once, giving ON-OFF operation to the optical sensor. Furthermore, the structure is such that the operation of the optical sensor can be transferred to the operator as an electrical signal by converting the operation of the optical sensor into a voltage ON/OFF using a circuit board.

[Example] Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a partially cutaway perspective view showing one embodiment of the present invention. The optical sensor main body 1 is composed of a light emitting section 2, a light receiving section 3, a substrate 4, and a bracket 5 to which they are attached, and is attached to a slit 7 machined in the upper surface of a pedestal 6. On the other hand, a shaft 10 is attached to the reflector 8 and extends in the same direction as the mechanical azimuth reference line 9 of the reflector. The slit 7 is located in the same vertical plane as the antenna installation reference line 12 determined by the two installation reference marks 11 at the bottom of the pedestal.

Therefore, when the reflecting plate 8 rotates, the shaft 10 passes between the optical sensor and the main body 1, and the light receiving part 3 of the optical sensor is
-Gives OFF operation. Then, this light receiving section 3 is turned on.
The OFF operation refers to the state when the installation reference line 12 of the antenna and the mechanical azimuth reference line 9 of the reflector are in the same direction.This signal is converted into a voltage signal by the board 4, and the antenna By transmitting the information to the operator who confirms the electrical performance of the reflector 8, the operator at a remote location can confirm that the mechanical azimuth reference 9 of the reflector 8 and the antenna installation reference 12 are parallel.

In the above embodiment, the shaft 10 extends in the same direction as the mechanical azimuth reference line 9 of the reflector 8, but even if the shaft 1o is extended with a shift relative to the reference line 9, this deviation will not occur. The optical sensor body 1 may be installed offset from the reference line 12 in accordance with the reference lines 9, 12.
Any mode is acceptable as long as the optical sensor can detect the coincidence of the two.

[Effects of the Invention] As explained above, the present invention includes an optical sensor that detects the shaft attached to the reflector, so that the mechanical orientation reference of the reflector can be set without removing the inspection window of the pedestal.
The effect can be confirmed by an operator located at a remote location. Furthermore, it minimizes measurement variations that occur in the conventional work of removing the pedestal's inspection window and checking visually, and the error in parallelism between the reflector's mechanical azimuth reference line and the antenna installation reference line. can be kept to a minimum. Furthermore, the use of this device eliminates the need for the pointer and the fixed pointer that were conventionally attached to the rotating shaft, making it possible to shorten the time required to adjust the pedestal in the morning.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of an antenna azimuth reference detection device according to an embodiment of the present invention. 1...... Optical sensor body, 2...
... Light emitting part, 3 ...... Light receiving part, 4 ...... Board, 5 ...... Bracket, 6 ...... ...Pedestal, 7...Slit, 8...Reflector, 9...Mechanical azimuth reference line of reflector, 10
......Shaft, 11...Installation reference mark, 12...
...Antenna installation reference line.

Claims (1)

[Claims] A device for detecting the azimuth reference of a rotating reflector provided in an antenna, comprising: a shaft attached to the reflector;
An antenna azimuth reference detection device comprising: an optical sensor that detects passage of the shaft when the azimuth reference direction of the reflector and the azimuth reference direction of the antenna become parallel.