JPS60260209A - On-vehicle receiver - Google Patents

Abstract

PURPOSE:To adjust easily the direction of an antenna by providing the antenna for receiving satellite broadcast freely turnably possible for being raised and brought down to an automobile or the like and detecting the inclination of a pole of the antenna so as to adjust the antenna vertically. CONSTITUTION:A weight 26 is suspended in the inside of the pole 10 via a universal joint 25 and pressure sensors 27a-27d are provided in every direction arround the pole. An output of the sensors 27a-27d is fed to two sets of differential amplifiers 28, 29 and the inclined state of the pole 10 is displayed by meters 30, 31 depending on the balanced state of the outputs of the amplifiers. The pole 10 is adjusted vertically according to the indications of the meters 30, 31. After the elevating angle of the antenna is adjusted in said vertical state, the antenna is turned and directed in the direction of the maximum sensitivity. Thus, the direction of the antenna is adjusted easily.

Description

[Detailed description of the invention] The present invention relates to an in-vehicle receiving device that enables

Conventional configuration and its problems Conventionally, as a device for receiving television broadcasts in a car, a diversity antenna composed of a combination of monopole antennas is attached to the roof side of the car, and this is used to receive the fiVHF band. A device that receives television broadcasts is used.

However, with such conventional equipment, it is difficult to obtain a good reception image in sub-divisional areas or mountainous areas due to a lot of ghost interference, and the electric field strength is weak in areas that are far from the broadcasting antenna or there are mountains on the way. In some cases, there are many restrictions, such as poor reception conditions.

OBJECTS OF THE INVENTION It is an object of the present invention to provide an on-vehicle receiving device that can receive signals by eliminating such conventional drawbacks.

The structure of the invention is provided to be freely movable. Then, the pole can be easily adjusted vertically using a detection device that detects the inclination of the pole that supports the antenna, and a vertical adjustment device that adjusts the inclination of the pole so that the pole is vertical. With a display device that displays the elevation angle and an elevation adjustment device that adjusts the elevation angle, you can easily adjust the elevation angle of the antenna to a predetermined angle.Easily adjust the direction of the antenna to the direction of the broadcasting satellite wherever you move. It has been made possible to do so.

DESCRIPTION OF THE EMBODIMENTS An embodiment in which the present invention is implemented for satellite television broadcast reception will be described below with reference to the accompanying drawings.

FIG. 1 shows a state in which a parabolic antenna 1 for receiving satellite television broadcasting is installed on the roof 3 of an automobile 2. As shown in FIG.

In this device, a pair of bearings 4 are provided on a roof 3, between which a support member 5 for raising and lowering is rotatably supported, and a bolt 6 for adjusting inclination is rotatably provided therein. 7 is its adjustment knob. A pair of support plates 8 are provided on the support member 5, and a somewhat vertically elongated through hole is provided at the tip of the support plate 8, through which a support shaft 9 is inserted, and a pole 10 is rotatably supported. The base of the pole 1o is rotatably attached to a nut 11 fitted to a bolt 6. Further, a pair of rails 12 is attached to the upper surface of the roof 3 of the automobile 2 as shown in FIG. Rotatably attach to the back of the tip of No.5. This adjustment member 13 consists of two metal rods f3a, 13
b. Threads in opposite directions are cut in the abutting portions of the center portion, and the adjustment bolts 14 are fitted into the abutting portions, so that the overall length can be adjusted.

On the other hand, a coupling box 15 is rotatably attached to the tip of the pole 10, and a frame 17 of a reflector 16 of the parabolic antenna 1 can be rotatably attached to this via a support shaft 18.

The frame 17 is provided with a weight 19 for indicating the elevation angle and a scale 2o.

21 is a primary radiator and SHF converter attached to the parabolic antenna by an arm 22, and 23 is a bolt for preventing rotation.

Next, the operation of the receiving apparatus configured as described above will be explained.

First, when driving a car 2, if the parabolic antenna 1 is raised, excessive wind pressure will be applied, which is dangerous.
Knock it over and leave it lying face down on roof 3.

Next, when stopping the car 2 and receiving satellite television broadcasting, first, one end of the adjustment member 13 is connected to the rail 12.
The support member 5 is raised by sliding it along the rail 12 and clamped in the hole 24 of the rail 12 as shown in FIG. 2, and the parabolic antenna 1 is raised as shown in FIG. 2.4.5. In this state, adjust the base of the pole 10 left and right by rotating the bolt 6 with the knob 7, and adjust the adjustment bolt 14.
Adjust the angle of the support member 50 by rotating the
Adjust so that the pole 10 is vertical. Means for detecting whether the pole 10 is vertical is shown in FIGS. 6 and 7. This is a structure in which a heavy cylinder 26 is suspended inside a pole 1o via a universal hinge 25, and pressure sensors 27a to 27d are provided in four directions around it.As shown in FIG. The outputs of ~27d are applied to two sets of differential amplifiers 28.29, and a meter 30.31 displays the tilt state of the pole 10 according to the balanced state of those outputs. For example, the meter 30 indicates the horizontal inclination of the pole 1o, and the meter 31 indicates the longitudinal inclination. Therefore, the knob i and adjustment bolt 4 are adjusted so that the readings on the meter 30.3'1 are all centered, and the pole 1o is made vertical.

Next, in a vertical state, parabolic astena 10 reflector 1
The frame 17 is connected to the coupling box 16 so that the angle of elevation of
rotate against. Since the angle at which the broadcasting satellite is viewed differs depending on the area in the country, the angle of elevation is checked using a manual or the like, and the angle of elevation is read using the vertically hanging weight 18 and the scale 19 and adjusted to the predetermined elevation angle.

Finally, the coupling box 15 is rotated around the pole 10 to rotate the parabolic antenna 1 to find the direction in which it can receive the television signal from the broadcasting satellite and to point it in the direction of maximum sensitivity. At this time, it is important that the pole 1o is vertical; if it is not vertical, the angle of elevation will change depending on the direction, and the signal will not be captured properly. In particular, since the body of a car is often tilted depending on where it is stopped, the tilt of the pole 10 is detected by the above-mentioned vertical detection means, and the pole 10 is adjusted vertically regardless of the tilt of the vehicle body. In this way, the parabolic antenna 1 can be easily and precisely adjusted towards the broadcasting satellite, and it can be easily and accurately adjusted from anywhere in the country as long as there is no direct obstruction in front of it. It can directly receive television signals from broadcast satellites. Therefore, even if the user travels by car to a place where normal television broadcast radio waves cannot reach, such as in a mountainous area, the television broadcast can be viewed. Furthermore, even in a community area, it is possible to see a good television image that is not affected by ghosts caused by buildings or the like.

When viewing is finished, one end of the adjustment member 13 is again slid along the rail 12, inserted into the other hole 32 and clamped, thereby allowing the parabolic antenna 1 to fall onto the roof 3 and travel.

Although the above embodiments have been described using a parabolic antenna, various other antennas such as a planar microwave antenna applying the theory of a crank-type microstrip antenna may also be used. In addition to television broadcasts, audio broadcasts based on PCM can also be received as broadcast signals from broadcast satellites.

A transmitting/receiving antenna is provided so as to be tiltable and rotatable, and
The antenna pole is configured so that it can be adjusted vertically by detecting its inclination, so even when the car is tilted and stopped, the pole can be easily erected vertically, and the elevation angle can be adjusted to a predetermined angle. This makes it extremely easy to rotate the antenna and point it in the direction of the broadcasting satellite. Therefore, wherever you go by car, you can easily receive high-quality television broadcasts from broadcasting satellites.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an in-vehicle receiver according to an embodiment of the present invention in a state in which the antenna is folded down, FIG. 2 is a perspective view in its raised state, FIG. 3 is a cross-sectional side view in its folded state, Figure 4,
Fig. 5 is a sectional side view and a sectional front view of the device in its raised state, Fig. 6 a and b are a partially cutaway perspective view and a sectional front view of an example of the tilt detection device used in the device, and Fig. 7 is its circuit. It is a diagram. 1...parabolic antenna, 2. river...car,
3...Roof, 5...Supporting member, 6...Mark/Bolt, 1o...Pole, 11...
Nut, 12...Rail, 13°゛゛°゛adjustment member, 14...Adjustment nut, 15...River/combination box, 16...Reflector, 17... ... Frame, 19 ... Weight, 20 ... Scale, 2
1...-Next radiator Oyohi converter, 24...
... Hole, 25 ... Universal joint, 26 ... Heavy V), 27a to 27d ...
・Pressure sensor, 28.29...Differential amplifier, 3
0°31...meter, 32...hole. Name of agent: Patent attorney Toshio Nakao, 1st person, 2nd person
Figure 3, Blue, Figure 4, Figure 6

Claims (1)

[Claims] A pole is provided on the roof of a vehicle such as a car so that it can be raised or lowered, and an antenna for receiving satellite broadcasting signals is rotatably installed on the pole, and a detection device that detects the inclination of the pole is installed, and a detection device that detects the inclination of the pole is installed, and the pole is installed vertically. A vehicle-mounted receiver comprising: a vertical adjustment device that adjusts the inclination of the antenna; a display device that displays the elevation angle of the antenna; and an elevation adjustment device that adjusts the elevation angle of the antenna.