JP2006211110A - Antenna system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna system relieving the burden imposed on a worker in its installation and building up an area of the antenna with high accuracy. <P>SOLUTION: The antenna system includes: a housing 11; a narrow band directional antenna 12 and a wireless section provided in the housing 11; an angle regulation means 13 for regulating a depression angle and a horizontal angle of the housing 11 in order to adjust a directional direction of the narrow band directional antenna 12; and a fitting metallic fixture 15 for fixing the angle regulation means 13 to a support 14. The housing 11 is provided with a mark 17 whereby the center of the narrow band directional antenna 12 is externally discriminated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an antenna device, and more particularly to an antenna device requiring a precise communication area design with a narrow communication area.

When an antenna device that transmits radio waves is installed only for users in a certain communication area, high accuracy is required for setting the azimuth (direction) of the antenna device.
Also, many antenna devices are often installed at high places.

  When the antenna device is installed at a high place, it is difficult for the installation operator to accurately determine the direction in which the antenna is facing due to restrictions on the work space such as a scaffold.

In view of this, an antenna that can be installed with high accuracy in the directivity direction of the antenna and a method for adjusting the antenna have been proposed (see, for example, Patent Document 1).
FIG. 6 shows this conventional antenna and its installation method.

  As shown in FIG. 6, the conventional antenna visually recognizes the optimum pointing direction range of the antenna 70 with respect to another antenna as a communication partner as a field of view of a certain area with respect to the other antenna direction as the communication partner. Therefore, the aiming means 71 is provided as the antenna directing direction adjusting means.

  Further, this conventional antenna is configured such that the support leg 73 of the aiming means 71 is inserted into the dovetail groove (not shown) of the support base 72 provided in the antenna 70 and fixed with the screw knob 74 for fixing. ing.

Then, after the aiming means 71 is fixed to the support base 72, the aiming means 71 visually confirms the antenna target as a communication partner, and determines the optimum antenna directing direction.
JP 2003-318628 A

However, the conventional antenna 70 needs to be provided with an attachment mechanism for attaching the aiming means 71, which causes an increase in the cost of the antenna 70.
Further, since the aiming means 71 is fixed, the type of the aiming means 71 is limited. Furthermore, it is difficult to look into the aiming means 71 at a high place.

  The present invention has been made to solve the conventional problems, and provides an antenna device that can reduce the burden on the operator when installing the antenna device and can accurately construct the antenna communication area. Objective.

  The antenna device of the present invention includes a housing, a narrowband directional antenna and a radio unit provided in the housing, and a depression angle and a horizontal angle of the housing to adjust a directivity direction of the narrowband directional antenna. Adjusting means for adjusting the adjusting means, and fixing means for fixing the adjusting means to another fixing object, and a discriminating means for discriminating the center of the narrowband directional antenna from the outside is provided in the casing. It is a feature.

  According to the present invention, when the antenna device is fixed to a fixing object such as a column by the fixing means and the pointing direction of the narrowband directional antenna is adjusted, the center of the antenna can be readily determined from the outside by the determining means.

  Thereby, the depression angle and horizontal angle of the casing, that is, the narrow band directional antenna are finely adjusted by the angle adjusting means, and the center of the antenna is placed at the position where the laser beam of the laser pointer installed at the center of the predetermined communication area is irradiated. It can be directed with high precision and ease.

  Further, the present invention provides a height of a center of the narrowband directional antenna with respect to a ground surface on which the other fixing object is provided on the housing or a member integrated with the housing, and the ground surface A thread is provided for adjusting the parallelism of the casing with respect to.

  Furthermore, the present invention is characterized in that the sled is provided on both sides of a center line parallel to the direction of the antenna in the casing.

  According to the present invention, since the casing in which the narrow band directional antenna is built in is provided with the discriminating means for discriminating the center of the narrow band directional antenna from the outside, Thus, the directivity direction of the antenna can be easily set with high accuracy without measuring the center of the antenna. Accordingly, it is possible to reduce the burden on the operator who performs the antenna installation work.

  Hereinafter, embodiments of an antenna device according to the present invention will be described in detail with reference to the drawings.

  1 to 3 show an antenna device 1 according to the present invention. As shown in FIG. 1, the antenna device 1 includes a casing 11, a narrow band pointing antenna 12 and a radio unit (not shown) provided in the casing 11, and the narrow band pointing antenna 12. Angle adjusting means 13 for adjusting the depression angle and the horizontal angle of the housing 11 and a mounting bracket 15 as a fixing means for fixing the angle adjusting means 13 to a column 14 which is another fixing object. And.

  Next, each of the above components will be described. The housing 11 is formed in a box shape. A resin-made SUN-SHADE unit 40 through which radio waves pass is provided on the front surface of the housing 11. The SUN-SHADE unit 40 is provided with a resin sheet 16 through which radio waves pass.

  The casing 11 is provided with a discriminating means 17 that indicates the center position of the narrow band directional antenna 12. In this example, a mark as the determination unit 17 is provided on the sheet 16 of the housing 11.

  A housing locking portion 41 that locks the housing 11 to the angle adjusting means 13 is provided on the rear surface of the housing 11. As shown in FIG. 2, the housing locking portion 41 is locked to a locked portion 42 provided in the depression angle adjusting means 21 described later.

  The above-described locked portion 42 has a substantially square shape, and a locking groove 45 whose upper side is opened is provided on a protruding portion 44 that protrudes upward from both ends thereof. Further, a mounting portion 46 with a hole is provided at the lower end portion of the locked portion 42.

  A locking bolt 47 that can be inserted into the locking groove 45 in the locked portion 42 is provided at the upper end of the housing locking portion 41 of the housing 11. A bolt 48 that is screwed into the mounting portion 46 in the above-described locked portion is provided at the lower end portion of the housing locking portion 41.

  When the housing 11 is attached to the angle adjusting means 13, the locking bolt 47 is attached to the locking groove 45 of the locked portion 42 in the angle adjusting means 13 while the locking bolt 47 of the housing locking part 41 is loosened. Then, the locking bolt 47 is tightened.

  In addition, the lower end portion of the housing locking portion 41 is fixed to the mounting portion 46 of the locked portion 42 with a bolt 48.

  The angle adjusting means 13 of FIG. 1 includes a connecting portion 20 that connects the mounting bracket 15 and the housing 11, a depression angle adjusting means 21 that adjusts the depression angle of the housing 11, and a horizontal angle that adjusts the horizontal angle of the connecting portion 20. And adjusting means 22.

  Among these, the depression angle adjusting means 21 is provided with a pair of substantially semicircular plate members 23 that protrude from the housing 11 toward the mounting bracket 15 and are arranged substantially vertically. One plate member 23 is provided with an arc-shaped long hole 24 having a central angle of 90 degrees. On the edge of the long hole 24, a scale 25 indicating the central angle (0 to 90 degrees) of the portion is provided from one end to the other end of the long hole 24.

  Further, one end of the connecting portion 20 is inserted between the pair of left and right plate members 23. One end of the connecting portion 20 is rotatably attached to the plate members 23 and 23 by a bolt 26 having a hexagon head. In addition, a bolt 27 inserted into the long hole 24 of the plate member 23 is screwed into one end portion of the connecting portion 20.

  When adjusting the depression angle of the casing 11, the bolts 26 and 27 are loosened, the casing 11 is rotated up and down (in the direction of arrow a) around the bolt 26, and the depression angle of the casing 11 is set to a predetermined angle. In the state, the bolt 27 is tightened. Thereby, the depression angle of the housing | casing 11 can be adjusted and hold | maintained to a predetermined angle.

  The horizontal angle adjusting means 22 is provided with a pair of substantially semicircular plate members 28, 28 that protrude from the mounting bracket 15 toward the housing 11 and are disposed substantially horizontally. The upper plate member 28 is provided with an arc-shaped long hole 29 having a central angle of 90 degrees. On the edge of the long hole 29, a scale 30 indicating the central angle (0 to 90 degrees) of the portion is provided from one end to the other end of the long hole 29.

  Further, the other end of the connecting portion 20 is inserted between the pair of upper and lower plate members 28, 28. The other end of the connecting portion 20 is rotatably attached to the plate members 28 and 28 by bolts 31. Further, a bolt 32 inserted into the long hole 29 of the plate member 28 is screwed into the other end portion of the connecting portion 20.

  When adjusting the horizontal angle of the casing 11, the bolts 31 and 32 are loosened, the casing 11 is rotated left and right (in the direction of the arrow b) around the bolt 31, and the horizontal angle of the casing 11 is set to a predetermined angle. Then, the bolt 32 is tightened. Thereby, the horizontal angle of the housing | casing 11 can be adjusted and hold | maintained to a predetermined angle.

  The mounting bracket 15 has a pair of gripping members 35 and 36 that grip the column 14. One or both of the gripping members 35 and 36 are provided with V-shaped notches 37 for fitting the struts 14 therein.

  Moreover, the holding members 35 and 36 are formed in a quadrangle. The four corners of the gripping members 35 and 36 are fastened by bolts 38 and nuts 39 that pass through the gripping members 35 and 36 and are fixed to the column 14. The horizontal angle adjusting means 22 is provided on one gripping member 36.

  A thread 50 for setting the height of the housing 11 is provided on the locked portion 42 of the connecting portion 20. In this example, holes 51, 51 are provided at both end portions of the locked portion 42, and threads 50, 50 having a predetermined length are tied to these holes 51, 51. The threads 51 and 51 can also be provided directly on the housing 11.

  As shown in FIG. 3, the casing 11 incorporates the narrowband directional antenna 12 described above. In addition, as described above, the sheet 16 of the housing 11 is provided with the mark 17 disposed on the center line of the narrow band directional antenna 12.

  Next, the operation of the antenna device 1 will be described. The antenna device 1 is installed by the following procedure.

First, when installing the antenna device 1, a communication area is simulated in advance by a computer. In the simulation, communication is performed based on various conditions of the antenna device such as communication output, antenna directivity, installation position of the antenna device, loss margin such as cable loss, and various conditions of the in-vehicle antenna device (not shown). Calculate the area.
An example of the simulation results is shown in FIG.
The X direction and the Z direction each indicate position coordinates on a plane parallel to the ground surface, and each contour line indicates a communication level on the plane parallel to the ground surface at the installation height of the vehicle-mounted antenna device. The above simulation is repeated, and the depression angle and the horizontal angle are calculated from the optimum communication area.
Based on the various conditions obtained in the simulation, the depression angle and horizontal angle of the antenna device are adjusted and fixed.

  When installing the antenna device 1, the mounting bracket 15, the depression angle adjusting means 22, the connecting portion 20, and the horizontal angle adjusting means 21, excluding the casing 11, are integrated so that the depression angle θ <b> 1 and the horizontal angle θ <b> 2 of the casing 11 are The adjusting means 22 and the horizontal angle adjusting means 21 are adjusted according to the depression angle and the horizontal angle obtained in the above simulation, and the mounting bracket 15 is fixed to the column 14.

  Next, the housing 11 is attached to the locked portion 42 of the horizontal angle adjusting means 21. Next, the threads 50, 50 of the same length are tied to the holes 51, 51 provided in the locked portion 42 and hung on the ground surface, and the tips of both threads 50, 50 are attached so as to touch the ground surface. The mounting position of the metal fitting 15 is adjusted. Thereby, the levelness and height of the housing 11 are adjusted.

  Next, the bolts 26 and 27 of the depression angle adjusting means 21 and the bolts 31 and 32 of the horizontal angle adjusting means 22 are loosened, and the depression angle adjusting means 21 and the horizontal angle adjusting means 22 can be adjusted.

  Here, as shown in FIG. 5, the depression angle and the horizontal angle of the laser pointer 63 installed at the center of the communication area 62 on the communication area surface 61 on the ground surface are adjusted in advance.

  Next, the laser beam 64 emitted from the laser pointer 63 installed at the center of the communication area 62 is incident on the mark 17 provided on the center line of the narrow band directional antenna 12. The depression angle θ1 and the horizontal angle θ2 are finely adjusted, and the bolts 26, 27, 31, 32 are tightened to fix the depression angle adjusting means 21 and the horizontal angle adjusting means 22. Thereby, the installation work of the antenna device 1 is completed.

  As described above, according to the present invention, when the antenna device 1 is fixed to the support column 14 by the mounting bracket 15 and the directivity direction of the narrow band directivity antenna 12 is adjusted, the antenna center can be easily located from the outside by the mark 17. Can be determined.

  Therefore, the depression angle and horizontal angle of the housing 11 are finely adjusted by the depression angle adjusting means 21 and the horizontal angle adjusting means 22, and the antenna center is set higher than the laser beam 64 of the laser pointer 63 installed at the center of the communication area 62. In addition to being able to turn with accuracy, the burden on the operator who installs the antenna device 1 can be reduced.

  Moreover, since the thread | sled 50,50 is provided in the to-be-latched part 42 integrated with the housing | casing 11 of this invention, the height of the center in the narrow band oriented antenna 12 with respect to the ground surface, and the ground surface It becomes easy to adjust the parallelism of the housing 11.

  As described above, the antenna device according to the present invention has an effect of reducing the burden of adjustment work of the antenna directing direction by making it easy to distinguish the center of the antenna from the outside. It is useful as an antenna device that requires a simple communication area design.

It is the perspective view which looked at the antenna device concerning the present invention from the front. It is the perspective view which looked at the antenna apparatus which concerns on this invention from back. 1 is a front view of an antenna device according to the present invention. It is a figure which shows the simulation result which concerns on this invention. It is a figure which shows the method of adjusting the depression angle and adjustment angle of the antenna device which concerns on this invention. It is a perspective view which shows the antenna device which concerns on a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Antenna apparatus 11 Case 12 Narrow band directivity antenna 13 Angle adjustment means 14 Support | pillar 15 Mounting bracket 16 Sheet | seat 17 Mark (discrimination means)
20 connecting portion 21 depression angle adjusting means 22 horizontal angle adjusting means 23 plate member 24 long hole 25 scale 26 bolt 27 bolt 28 plate member 29 long hole 30 scale 31 bolt 32 bolt 35 gripping member 36 gripping member 37 notch 38 bolt 39 nut 40 SUN-SHADE section 41 Enclosure locking section 42 Locked section 44 Protruding section 45 Locking groove 46 Mounting section 47 Bolt 48 Bolt 50 Thread 51 Hole 61 Communication area surface 62 Communication area 63 Laser pointer 64 Laser beam 64 Laser light 70 Antenna 71 Aiming Means 72 Support stand 73 Support leg 74 Knob

Claims (3)

A housing, a narrowband directional antenna and a radio unit provided in the housing, and an angle adjusting means for adjusting a depression angle and a horizontal angle of the housing to adjust a directivity direction of the narrowband directional antenna. Fixing means for fixing the adjusting means to another fixing object,
An antenna device, wherein a discrimination means for discriminating the center of the narrow band directional antenna from the outside is provided in the casing.   The height of the center of the narrowband directivity antenna with respect to the ground surface on which the other fixing object is provided on the housing or a member integrated with the housing, and the housing with respect to the ground surface The antenna device according to claim 1, wherein a thread for adjusting parallelism is provided.   The antenna device according to claim 2, wherein the sled is provided on both sides of a center line parallel to a directivity direction of the narrow band directivity antenna in the housing.

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