JPH0683095B2 - Car radio receiver - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an on-vehicle radio receiver that receives a signal in a state where a receiving point moves, and particularly to an on-vehicle radio receiver that can immediately receive at another point after moving. For radio receiver.

[Conventional technology]

Conventionally, this type of in-vehicle radio receiver includes a storage unit that stores frequencies of a plurality of broadcasting stations, and a plurality of pushbutton switches that are associated in advance with the frequencies stored in the storage unit. By pressing one of the plurality of push button switches, the broadcasting station of the corresponding frequency is selected.

This conventional on-vehicle radio receiver adjusts its tuning section to one of the frequencies of receivable broadcasting stations at the current position of the vehicle, and maintains the receiving state only when moving within the range of this receivable area. To do.

[Problems to be Solved by the Invention]

Since the conventional vehicle-mounted radio receiver is configured as described above, when the vehicle moves to another area beyond the receivable area of the broadcasting station stored in the storage unit, the driver is The operation of searching again for selectable frequencies and storing it in the storage unit must be repeated after each movement in each area,
There is a problem that complicated operations are required.

The present invention has been made to solve the above problems,
An object of the present invention is to propose a vehicle-mounted radio receiver that can immediately receive a receivable broadcasting station at the current position after moving even when moving to another area.

[Means for Solving the Problems]

 FIG. 1 is an explanatory view of the principle of the present invention.

In the figure, an in-vehicle radio receiver according to the present invention stores current position detecting means for detecting the current position of a vehicle and outputting current position detection data, and position data and transmission frequency data for a plurality of broadcasting stations. Broadcasting station information storage means, and broadcasting station detection means for outputting receivable transmission frequency data based on the current position detection data location data and transmission frequency data.

The broadcasting station information storage means is a broadcasting station data storage means for storing location data and transmission frequency data regarding a plurality of broadcasting stations, and the transmission for a receivable broadcasting station at the current position of the vehicle based on the discrimination data. Receivable broadcasting station data storage means for storing frequency data.

Broadcasting station detecting means, based on the current position detection data and the location data, a determination means for determining whether or not each of the broadcasting stations is receivable at the current position of the vehicle and outputting determination data. Of the broadcast stations corresponding to the location data and the transmission frequency data stored in the receivable broadcast station data storage means, the broadcast station corresponding to the broadcast station determined to be unreceivable by the determination data obtained after the storage Erasing means for erasing transmission frequency data from the receivable broadcast station data storage means, and transmission frequency data output means for outputting the transmission frequency data stored in the receivable broadcast station data storage means based on an external instruction. And are provided.

[Action]

According to the present invention, the broadcasting station data storage means stores in advance location data and transmission frequency data regarding a plurality of broadcasting stations.

The current position detection means detects the current position of the vehicle and outputs the current position detection data to the broadcasting station detection means.

As a result, the discrimination means of the broadcasting station detecting means discriminates, for each broadcasting station, whether or not the broadcasting station can be received at the current position of the vehicle based on the current position detection data and the location data, and outputs the discrimination data.

Based on this discrimination data, the broadcasting station detecting means reads out the transmission frequency data of the receivable broadcasting station at the current position of the vehicle from the broadcasting station data storage means and stores it in the receivable broadcasting station data storage means.

Further, the erasing means is a transmission frequency data corresponding to a broadcasting station determined to be unreceivable by the discrimination data obtained after the storage among the broadcasting stations corresponding to the transmission frequency data stored in the receivable broadcasting station data storage means. Is deleted from the receivable broadcasting station data storage means.

In parallel with these, the transmission frequency data output means outputs the transmission frequency data stored in the receivable broadcasting station data storage means based on an instruction from the outside.

Therefore, the transmission frequency data output from the transmission frequency data output means is only the transmission frequency data of the broadcasting station that can be always received, the vehicle-mounted radio receiver,
Only by performing the receiving operation based on the transmission frequency data output by the transmission frequency data output means, it is possible to surely receive, and even when moving to another area, immediately shift to the receiving operation at the current position after movement. can do.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 2 to 4. FIG. 2 is a block diagram of this embodiment,
FIG. 3 shows a data storage mode of the ROM shown in FIG. 2, and FIG. 4 shows an operation flowchart of this embodiment.

In each of the above drawings, the in-vehicle radio receiver according to the present embodiment uses a radio navigation system (GPS;
al positioning system) to detect the present position of the vehicle by receiving the present position of the vehicle, location information (x ₁ · y ₁ ... xn · yn) about multiple broadcasting stations in each place, frequency f ₁ ...
f2, station name A ... n, etc. are stored, and broadcasting for detecting the frequency of the receivable broadcasting station among the broadcasting stations stored in ROM2 based on the detected current position detected by the current position detection unit 1 The frequency of the station detecting unit 3 and the frequency of the broadcasting station detected by the broadcasting station detecting unit 3 are input to the frequency setting unit 41.
A receiver 4 for receiving the set frequency set in 41, and a key switch 5 for selecting a specific frequency among the receivable broadcast station frequencies detected by the broadcast station detecting section 3 with respect to the receiving section 4. And a display 6 for displaying various information and the like regarding the broadcasting station received by the receiving unit 4.

Assuming that the positions of the three satellites are known, the current position detector 1 measures the propagation time from each satellite and obtains the current position of the vehicle as the intersection of the three spheres. Specifically, the deviation between the clock on the receiver side and the clock on the satellite side in the current position detection unit 1 is set as an unknown value ΔT, and four equations obtained from four satellites are solved to calculate the current position of the vehicle (X , Y, Z) and ΔT.

The ROM2, as shown in Fig. 3, is east longitude x ₁ ... xn and north latitude
Stores the location information of the broadcasting station specified by y ₁ … yn,
Corresponding to the location information, frequencies f ₁ ... Fn and station names A ... n
In addition to storing the frequency / station name information of, the information such as broadcast content and genre is stored as a remark.

The broadcasting station detection unit 3 determines whether or not there is a broadcasting station specified by the location information of the ROM 2 within a predetermined area centered on the detected current position of the current location detection unit 1, and if it exists, Detects as a receivable broadcasting station and outputs the frequency of this broadcasting station to the receiving unit 4.

The receiving unit 4 sets the frequency by the frequency setting device 41 based on the frequency output from the broadcasting station detecting unit 3, and combines the set frequency and the received signal received by the antenna 42 by the frequency mixing circuit 43, Audio is output from the speaker 47 through the intermediate frequency amplification path 44, the detection circuit 45, and the low frequency amplifier 46.

The key switch 5 is composed of 10 key switches and the like,
It is intended to select an arbitrary broadcast station from the receivable broadcast stations by a driver's selection operation and to instruct the display content of the display 6.

The display 6 is composed of a display device such as a CRT, a liquid crystal display, etc.
Displays information such as the station name, frequency, and genre of the currently receiving broadcasting station, and instructs the information about the currently receiving broadcasting station.

Next, the operation of this embodiment based on the above configuration will be described with reference to FIG. Here, a case where the vehicle travels and moves to another area and the broadcasting station which is receiving the signal cannot receive the signal will be described as an example.

When the 10 key of the key switch 5 is pressed in the broadcasting station detection unit 3,
It is judged whether or not it is in the ON state (step 1). If the driver cannot press the 10 key of the key switch 5 because the broadcasting station that is receiving the signal cannot receive the signal, the detection command is output to the current position detection unit 1.

Based on the detection instruction, the current position detection unit 1 detects the current position of the vehicle (step 2).

The broadcast station detection unit 3 based on the detected current position of the vehicle
Reads the frequencies of multiple receivable stations from ROM2,
Of the plurality of broadcasting stations, the nth frequency from the lowest frequency designated by the key switch 5 is read and output (step 3).

The read frequency is output to the frequency setting unit 41 of the receiving unit 4, and the received signal is detected based on the frequency set by the frequency setting unit 41 to output a voice (step 4).

FIG. 5 shows an operation flowchart of another embodiment. The circuit configuration of the other embodiment is the same as the circuit configuration of the embodiment shown in FIG. 2, and the operation of the broadcasting station detection unit 3 in this circuit configuration is different.

In the same figure, another embodiment is a case where the broadcasting station that is receiving is no longer able to receive like the above-mentioned embodiment, and the broadcasting station detection unit 3 judges whether or not the 10 key is in the ON state (step 1). ,
The current position detector 1 detects the current position of the vehicle (step 2). Based on the detected current position of the vehicle, the broadcast station detection unit 3 reads from the ROM 2 the frequency of a broadcast station having the same broadcast content or genre of the receivable broadcast station as the genre (step 31).

This read frequency is output to the receiving unit 4 as in the above embodiment, and this frequency is detected and voice output is performed (step 4).

FIG. 6 shows a block diagram of a vehicle-mounted radio receiver according to another embodiment. This other embodiment is the same as the second embodiment described above.
A RAM 7 for storing the frequencies of receivable broadcast stations read from the ROM 2 by the broadcast station detection unit 3 is added to the configuration of the illustrated embodiment.

Next, the operation of another embodiment based on the above configuration will be described with reference to FIG. FIG. 7 shows an operation flowchart of another embodiment.

In the figure, the current position detector 1 detects the current position of the vehicle (step 11). Based on the detected current vehicle position, the broadcast station detection unit 3 determines the frequency of the receivable broadcast station as RO.
The data is read from M2 and the read frequency is stored in RAM7 (step 12).

After storing the frequency in the RAM 7, the current position detecting section 1 detects the current position of the vehicle again (step 13).

Next, the broadcasting station detection unit 3 determines whether there is an unreceivable broadcasting station among the broadcasting stations of a plurality of frequencies stored in the RAM 7 in step 12 based on the current position of the vehicle detected in step 13 ( Step 14). If it is determined in step 14 that there is no unreceivable broadcasting station, the frequency designated by the key switch 5 among the frequency data stored in the RAM 7 is output to the receiving section 4 (step 15).

On the other hand, when it is determined in step 14 that there is a broadcast station that cannot be received, the broadcast station detection unit 3 functions as an erasing means and a corresponding reception failure of the RAM 7 as a receivable broadcast station data storage means. The frequencies (data) of possible broadcasting stations are deleted (step 16). As a result, the frequency of the broadcasting station stored in the RAM 7 always corresponds to the receivable broadcasting station, and if this frequency is read and the receiving operation is performed, the receiving operation is always possible.

Further, the broadcast station detection unit 3 determines whether there is a receivable broadcast station based on the current position of the vehicle detected in step 13 (step 17).

When it is determined in step 17 that there is no receivable broadcasting station, the process is repeated every time the current position of the vehicle is detected in step 13 until it is determined that there is a receivable broadcasting station.

If it is determined in step 17 above that there is a receivable broadcasting station, the frequency of the receivable broadcasting station is read from the ROM2, and the receivable (broadcasting station) frequency is determined.
It is added to RAM7 and stored (step 18).

Next, it is determined whether or not there is a frequency that cannot be subsequently received among the frequencies stored in the RAM 7 in step 18 (step 19). If there is no unreceivable broadcasting station by this judgment, the external key switch 5 among the frequencies (data) stored in the RAM 7 as in step 14 is used.
The frequency specified by is output to the receiver 4 (step 1
5), the receiving operation is performed.

In this case, since the frequency that can be designated by the key switch 5, that is, the frequency stored in the RAM 7 is the frequency corresponding to the receivable broadcasting station at all times, it is necessary to determine at this point whether it is receivable or not. Therefore, it is possible to quickly shift to the reception operation.

If it is determined in step 19 that there is a broadcasting station that cannot be received, the process returns to step 13 and each of the steps 13 to
19 will be repeated.

In each of the above-described embodiments, the current position detection unit 1 is configured to detect the current position of the vehicle using GPS. However, an azimuth sensor, a geomagnetic sensor, a vibrating angular velocity sensor, a wheel rotational speed difference sensor, a gas straight, an optical sensor. The present position of the vehicle may be detected by various gyroscopes such as fibers and other sensors.

In each of the above embodiments, the reception of the receiving unit 4 is performed by a key switch.
The configuration is performed by reading the n-th from the lowest frequency in the receivable broadcasting station specified by 45, but it is preset from one channel in order from the lowest (or highest) frequency and received in this order. It can also be configured as follows.
It is also possible to preset the broadcasting station name in the order of Japanese syllabary, alphabetical order, or other order, and receive in this order.

In each of the above embodiments, the display 6 is configured to display the information about the broadcasting station.
The current position of the vehicle detected in step 3 may be displayed on the map.

〔The invention's effect〕

As described above, according to the present invention, the receivable broadcast station data storage means stores the transmission frequency data for the receivable broadcast station, and the transmission stored in the receivable broadcast station data storage means. Of the broadcasting stations corresponding to the frequency data, the transmission frequency data corresponding to the broadcasting station determined to be unreceivable by the discrimination data obtained after the storage is deleted by the erasing means, and therefore stored in the receivable broadcasting station data storage means. The transmission frequency data to be transmitted is only the transmission frequency data for the receivable broadcasting station.

Therefore, since the transmission frequency data output by the transmission frequency data output means based on an instruction from the outside is also only the transmission frequency data for the receivable broadcasting station, the in-vehicle radio receiver outputs the transmission frequency data. Only by performing the receiving operation on the basis of the transmission frequency data output by the means, it is possible to reliably receive, and even when moving to another area, it is possible to immediately shift to the receiving operation at the current position after the movement. Has the effect.

[Brief description of drawings]

FIG. 1 is a diagram for explaining the principle of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, FIG. 3 is a ROM data storage mode diagram shown in FIG. 2, and FIG. 4 is an embodiment shown in FIG. 5 is an operation flowchart of another embodiment of the present invention, FIG. 6 is a block diagram of another embodiment of the present invention, and FIG. 7 is an operation of another embodiment described in FIG. A flow chart is shown. 1 …… Current location detector 2 …… ROM 3 …… Broadcast station detector 4 …… Receiver 5 …… Key switch 6 …… Display 7 …… RAM 41 …… Frequency setter

Claims (1)

[Claims] 1. A present position detecting means for detecting a present position of a vehicle and outputting present position detection data, a broadcasting station data storing means for storing present position data and transmission frequency data regarding a plurality of broadcasting stations, said present Based on the position detection data and the location data, it is determined whether or not the broadcasting station can be received at the present position of the vehicle for each broadcasting station, and the discrimination data is output, and the vehicle based on the discrimination data. Corresponding to the receivable broadcasting station data storage means for storing the transmission frequency data of the receivable broadcasting station at the present position, and the location data and the transmission frequency data stored in the receivable broadcasting station data storage means Of the broadcasting stations that are determined to be unable to be received by the discrimination data obtained after storage, the transmission frequency corresponding to the broadcasting station Erasing means for erasing data from the receivable broadcast station data storage means, transmission frequency data output means for outputting the transmission frequency data stored in the receivable broadcast station data storage means based on an external instruction, An in-vehicle radio receiver characterized by being equipped with.