JPS61140228A - Mobile radio receiving set - Google Patents

Abstract

PURPOSE:To make the automatic channel selection of a specific radio broadcasting in the area of moving surely by storing the data of receivable ratio broadcasting in advance at every area in a memory and addressing the memory according to the data of the area during the moving is made at present. CONSTITUTION:With the running of an automobile, the present area under the moving is deduced successively by an area code data generator 2, and at a time when an automatic channel selection switch 7 is operated in the area during moving, specific area code data corresponding to the area during the moving are read in an ECU8 for radio. The ECU8 for radio makes the addressing of a ROM for radio broadcasting station list 3 according to read the area code data, and reads out the data of radio broadcasting that can be received in present area. A tuning signal is given to a tuner 1 according to the read data of radio broadcasting to make it select a specific radio broadcasting.

Description

DETAILED DESCRIPTION OF THE INVENTION 1. The present invention relates to a mobile radio receiving device such as a car radio.

In general, when it comes to mobile radio receiving devices such as car radios, the broadcasting field strength becomes stronger or weaker depending on the area you are traveling to. Currently, listeners sense this, know the limits of reception conditions, and use tuning operations to find out whether there are other broadcasts they can listen to in unfamiliar areas.

However, in the past, receivable radio broadcasts were searched for by detecting radio waves with a certain electric field strength or more in a certain area according to key operations, and the frequency of the detected radio waves having a certain electric field strength or more was searched. A system has been developed that automatically tunes into the channel.

However, if such a method is used, all radio waves other than radio broadcasts will be detected and tuned in as long as the field strength exceeds a certain level, so it may be possible to receive noise or to tune in at night. They also end up receiving unnecessary radio broadcasts, such as foreign broadcasts where the electric field strength is strong.

■ The present invention has been made in consideration of the above points.

An object of the present invention is to provide a mobile radio receiving device that can reliably automatically select a predetermined radio broadcast in a moving area.

1. In order to achieve the objective, the present invention stores in advance the data of radio broadcasts that can be received in each region in a storage device, extracts the data of the region where the person is currently moving, and uses the extracted regional data. By addressing the storage device in accordance with the radio broadcast data read out, the station is automatically selected according to the read radio broadcast data.

In addition, the present invention takes into consideration the case where radio broadcast waves cannot be received due to being hidden in the mountains, and the electric field strength of the radio broadcast according to the data read from the storage device is above a certain level that can actually be heard. This allows you to automatically select a channel by pressing the circle.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the mobile radio receiving device according to the present invention.

As shown in Fig. 1, a tuner 1 has an automatic tuning function that tunes to radio waves received by an antenna ANT, and an area code data generator that determines the area of movement and generates predetermined coded data. 2, data of receivable radio broadcasts for each region is stored in advance as a radio broadcast station list, and data of a predetermined radio broadcast is read out from the region code data generator 2 using the generated region code data as an address. A ROM 3 for a list of radio broadcast stations selected by the tuner 1, an amplifier 4 for outputting audio from the speaker SP of the radio broadcast selected by the tuner 1, and a ROM 3 for a list of radio broadcast stations currently being received according to the data of the broadcast station read from the ROM 3 for a list of radio broadcast stations. Information on the radio broadcast of C
A display ECU 6 (incorporates a character generator necessary for displaying station names, frequencies, etc. of radio broadcasting) to be displayed on a display 5 such as RT, and outputs operation commands for automatic tuning by switch operation. It is comprised of an automatic tuning switch 7 and a radio ECU 3 that controls the entire system in accordance with the automatic tuning operation command to select a predetermined radio broadcast and display information.

The radio broadcast data stored in the radio broadcast station list ROM 3 includes data necessary for tuning and information display, such as radio broadcast audible frequency data and broadcast station name data. When there is no particular need to display information about radio broadcasts, only the audible frequency data of radio broadcasts necessary for automatic channel selection is sufficient.

The operation of the mobile radio receiving apparatus according to the present invention configured as described above will be explained below.

First, as the car travels, the area code data generator 2 sequentially determines the current area of movement, and when the automatic channel selection switch 7 is operated in a certain area of movement, the area of movement at that time is selected. The corresponding predetermined area code data is read into the radio ECU 3. The radio ECU 3 addresses the radio broadcast station list ROM 3 in accordance with the read regional data code, reads data on radio broadcasts that can be received in the current region, and sends data to the tuner 1 according to the read radio broadcast data. A tuning signal is given to tune in to a predetermined radio broadcast. Thereby, the received radio waves of the radio broadcast tuned by the tuner 1 are amplified by the amplifier 4 and reproduced from the speaker SP. At the same time, radio ECU3
gives a display signal to the display ECU 6 according to the radio broadcast data read from the radio broadcast station list ROM 3, and displays the name of the radio broadcast currently being received, 9 frequencies, etc. on the display 5 under the control of the display ECU 6. is displayed.

At that time, if multiple radio broadcasts that are currently receivable in the area are registered in the radio broadcast station list ROM 3, a priority order is given to each radio broadcast in advance (specifically, each radio broadcast The radio ECU 3 first selects the radio with the highest priority from among the plurality of radio broadcast data simultaneously read out from the radio broadcast station list ROM 3 according to the area code data. A control means is used to select a radio broadcasting station, and thereafter change the radio broadcasting station selection one after another in accordance with the priority order each time the automatic tuning switch 7 is operated. Furthermore, each time the radio broadcast selection is switched according to the priority order, the information display of the currently selected radio broadcast on the 1 display 5 is sequentially switched.

Under the control of the radio ECU 3, models of each receivable radio broadcast station are displayed on the display 5 as shown in FIG. Display each one, and give an instruction to the radio ECU 3 by selectively pressing one of 5 from 1 to 5 on the selection key provided corresponding to each of the displayed broadcast station names A to E. By doing so, it is also possible to take a method of selecting an arbitrary radio broadcast at one time. At this time, under the control of the display ECU 6, the selected broadcasting station name C and its frequency display line from among the radio broadcast stations model-displayed on the display 5 are made clear by brightness modulation or marked. Appropriate display means such as

FIG. 3 shows a specific configuration example of the area code data generator 2. For example, a direction sensor such as a geomagnetic type or a gyro type that outputs a signal proportional to the direction or the amount of change in direction according to the traveling direction of the car. 21, and a distance sensor 22 that generates a pulse signal for each unit mileage of the vehicle.
Then, in accordance with the output signals of these sensors 21 and 22, the current position on the two-dimensional coordinates, which changes every moment, for each unit mileage of the car is calculated sequentially, and the data of the calculated current position and the current position are stored in the memory 23 in advance. After successively comparing the regional data corresponding to the two-dimensional coordinates stored in blocks for each unit region to determine which region the current position is in, the determined region is determined. A signal processing device 24 that generates code data, and an operating device that can arbitrarily set the starting point of the car on two-dimensional coordinates! 25.

Note that the signal processing device 24 uses the starting point on the two-dimensional coordinate set by the operation bag ff125 as a reference, and sends a signal from the distance sensor 22 for each unit traveling distance of 1㎎-r<6/
<jtzX□□Cow 1. A1. . .

While measuring the distance traveled, the vehicle's course change is determined from the direction signals sent sequentially from the direction sensor 21, and the current position on the two-dimensional coordinates is determined moment by moment. The operating device 25 can be used to determine the starting point of the car, for example by manually instructing a point on a map displayed in correspondence with two-dimensional coordinates (in a matrix) or by directly instructing with a light pen or the like. The position data is transmitted to the signal processing device 24.
It is now possible to give.

In addition, instead of using such an area code data generator 2, a group of area-specified manual switches corresponding to each area is provided, and the operator operates a predetermined switch after determining the area to which the operator is moving based on the current position. It is also possible to give the area code data to the radio ECU 3.

In this manner, when the mobile radio receiving apparatus according to the present invention is installed in a car, for example, the user can simply operate the automatic tuning switch 7 to select receivable radio broadcasts that are registered in advance according to the area where the car is moving. You can now select channels automatically.

Further, FIG. 4 shows another embodiment of the present invention.

In this case, as described above, RO for radio broadcasting station list
A field strength detector 9 is separately provided to detect whether the field strength of the receivable radio broadcast read from the M3 is above a certain audible level, and the field strength is kept constant under the control of the radio ECU 3. I am trying to take measures to automatically tune in to radio broadcasts that are above my level.

Specifically, the radio ECU 3 transmits receivable radio broadcasts.
After the tuner 1 temporarily selects a station under the control of is read by the radio ECU 3, and if it is above a certain level, the current radio broadcast tuning state is maintained, and if it is lower than a certain level, the tuning is switched to another receivable radio broadcast. I'm trying to get them to do it.

Therefore, by adding a means for selecting radio broadcasts according to the electric field strength, for example, even if a receivable radio broadcast that is registered in advance according to the moving area is selected as described above, the It becomes possible to eliminate the occurrence of a situation in which a selected radio broadcast cannot be fully audible because a car or the like happens to be hidden behind a mountain.

As described above, in the mobile radio receiving device according to the present invention,
Receivable radio broadcast data for each region is stored in advance in a storage device, data for the region currently being moved is extracted, and the storage device is addressed in accordance with the extracted regional data. Since the automatic channel selection is performed according to the data of the radio broadcast that is issued, it has the excellent advantage that it is possible to reliably automatically select a predetermined radio broadcast in the moving area.

[Brief explanation of the drawing]

FIG. 1 is a block diagram 9 showing an embodiment of a mobile radio receiving device according to the present invention, FIG. 2 is a diagram showing an example of display contents of a display in the same embodiment, and FIG. FIG. 4 is a block diagram showing a specific example of the configuration of the area code data generator 2. FIG. 4 is a block diagram showing another embodiment of the present invention.

Claims (1)

[Scope of Claims] 1. Storage means for storing data of receivable radio broadcasts for each region in advance, means for obtaining data of the region currently being moved, and said storage means according to the obtained regional data. 1. A mobile radio receiving device comprising means for automatically selecting a station according to radio broadcast data read out by addressing. 2. A storage means for storing in advance data on radio broadcasts that can be received in each region, a means for obtaining data for the region currently being moved, and reading by addressing the storage means according to the obtained regional data. This mobile radio receiving device is provided with a means for automatically tuning the radio broadcast by checking whether the electric field strength of the radio broadcast according to the output data is above a certain level that can actually be heard.