JPH0632155B2 - Vehicle receiver - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle receiver, and more particularly to a vehicle receiver including a traveling guide device that guides the vehicle to a set destination.

<< Prior Art >> As is well known, a vehicle receiving device, for example, a radio receiver is provided with a plurality of pushbutton switches, and each switch is preset to individually correspond to the frequency of the broadcasting station, When the driver selects one of the switches, the transmission frequency of the broadcasting station and the frequency of the receiver are synchronized with each other so that the radio broadcast can be immediately heard.

In this type of radio receiver, there is also provided a radio receiver that displays the name of the broadcasting station that is currently in a receiving state, for the convenience of the driver.

By the way, the confirmed frequencies are assigned to the broadcasting stations existing in Japan, but the broadcasting stations do not necessarily have different frequencies that do not overlap, and multiple stations are assigned to the same frequency. There is.

Such stations of the same frequency are not usually located in close proximity, but since the vehicle may travel all over Japan, the radio receiver with the broadcast station name display described above has the following problems. was there.

<< Problems to be Solved by the Invention >> That is, in the above radio receiver with broadcasting station name display, since the station name is displayed corresponding to the reception frequency, a plurality of broadcasting stations correspond to the same frequency. In some cases, you may be afraid to display the wrong station name.

Therefore, in order to deal with such a problem, Japan is divided into broadcasting areas, for example, Hokkaido, Tohoku, Kanto, etc., and it is manually selected that the vehicle is running in each corresponding block, and the station name is selected. Although it may be possible to specify only one block, when traveling several blocks in a relatively short time, such as a long-distance truck, it is extremely troublesome to select each block.

The present invention has been made in view of such problems, and the purpose thereof is, for example, JP-A-57-
An object of the present invention is to provide a receiving device for a vehicle that can easily display a broadcasting station name without using a troublesome manual operation by using a vehicle running guidance device disclosed in Japanese Patent No. 46112.

<< Means for Solving Problems >> In order to achieve the above-mentioned object, the present invention has a current position detection means (a) for detecting the current position of a vehicle, and guides the vehicle to a set destination. In a vehicle equipped with an induction device (b) and a radio receiver (c), a storage means (d) for storing the frequency of each broadcasting station name, the station name corresponding to it and the location or broadcasting area of each broadcasting station is provided. A frequency detecting means (e) for detecting a reception frequency currently received by the radio receiver (c), a detection signal of the detecting means (e) and the current position detecting means (a).
Station name selecting means (f) for selecting one of the station names in the storage means (d) based on the current position of the vehicle detected by
And a display means (g) for displaying the station name specified by the selection means (f) as character information.

<< Operation >> According to the receiving device with the above configuration, since the broadcasting station that can be received from the current position of the vehicle is specified, even if the broadcasting station has the same frequency, the receiving station name is displayed incorrectly. Will not be lost.

<< Embodiment >> A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

2 to 4 show an embodiment of a vehicle receiving device according to the present invention.

As shown in the overall configuration of FIG. 2, the receiver shown in FIG. 2 is roughly composed of a traveling guide device 10 for guiding a vehicle to a set destination and a radio receiver 12 having an antenna.

The travel guidance device 10 includes a display unit 14, a storage unit 16, a current position detection unit 18, and a control unit 20.

The display unit 14 has information for guiding the vehicle to travel, for example, a map of an area where the vehicle is currently traveling, a guidance target location set on the map, a route for guiding the vehicle to the guidance target location, and a current location detection. The present position obtained by the means 18 and the name of the broadcasting station received by the radio receiver 12 are displayed. Generally, monochrome or color C is displayed.
RT, liquid crystal display device, plasma display, electroluminescence, etc. are used, and the information displayed is controlled by the control means 20.

The storage means 16 stores at least information necessary for driving guidance including a map. For example, a CD-ROM or a magnetic tape is used. Particularly, the CD-ROM has a large storage capacity, is compact, and has an access time. Since it is short, it is suitable as a storage means for mounting on a vehicle, and the stored information may store a vehicle starting point detection procedure, a tire replacement procedure, and the like in addition to the map.

The information is taken out from the storage means 16 by mounting a recording medium such as a compact disc or a tape on the reproducing device and controlling the reproducing device by the control means 20.

The current position detecting means 18 receives a radio signal from a satellite to detect the current position of the vehicle, which is a positioning system (GPS).
May be provided at least, and a sensor for detecting the current position by known geomagnetism may be provided together with or in place of the GPS.

The principle of detecting the current position of the vehicle by GPS will be briefly described below.

As schematically shown in FIG. 3, the GPS has a plurality of antennas A _{1 to} A ₄ dispersedly arranged on the earth E at appropriate intervals,
It is composed of a plurality of satellites S _{1 to} S ₄ and a user P, and each satellite S _{1 to} S ₄ is controlled by the control station C via the antennas A _{1 to} A ₄ . Further, each satellite S _{1 to} S ₄ has a receiver that receives signals from the antennas A _{1 to} A ₄ , and a transmitter that emits various information signals to the user P, and the user P is the satellite S 1. _And receivers for receiving the signals from _{1 to} S ₄ .

Here, if there is a clock that is completely synchronized with the transmission point and reception point of the radio wave and the transmission signal is controlled by that clock, if the reception timing is measured at the reception point, the propagation of the radio wave between the transmission and reception points The time can be obtained, and the distance between the transmitting and receiving points can be obtained by multiplying it by the speed of light.
Now, there are three satellites S ₁ , S ₂ , S _{3 in} the field of view (receivable area) of the user P, and the respective satellites S ₁ , S ₂ ,
S ₃ has transmitted the ranging signal by the clock synchronized with each other, and the position at the time of reception of each satellite S ₁ to S ₃ had been accurately determined. If the reception time of these signals is measured at the reception point P, the distance between each satellite S ₁ , S ₂ , S ₃ and the reception point P is obtained, and the position of the user P is the satellites S ₁ , S ₂ , S.
₃ can be obtained as the three intersections of the spherical surface centered at.

As a result, the current position of the running vehicle can be grasped as an absolute position on the earth.

On the other hand, the control means 20 comprises a so-called microcomputer in this embodiment, and an input / output interface 20a connected to the display means 14, the storage means 16, the current position detection means 18, and the radio receiver 12, respectively. The input / output interface 20a according to the procedure stored in the read only memory (ROM) 20b.
A signal from the current position detecting means 18 is received via the CPU, calculation is performed, and based on the result, the storage means 16 is controlled to store the stored information, for example, a CPU 20c for displaying the current position on a map. Random access memory (RAM) 20 for temporarily storing data
It consists of d and.

Particularly, in the receiving device of the present invention, the frequencies of broadcasting stations in Japan, the broadcasting station names corresponding thereto and the coordinates of the locations of the broadcasting stations are stored in advance in the RAM 20d as shown in the table below. ing.

Then, for example, when the driver tries to listen to an FM broadcast of 80.0 MHz with the radio receiver 12, a signal corresponding to this frequency is taken in through the interface I / F 20a, and this signal and the output of the current position detecting means 18 are output. Is calculated by the CPU 20c on the basis of the following, and one of the broadcasting stations of the same frequency is selected by the following procedure, and the display means 14
Display the station name on.

A flowchart of this processing procedure is shown in FIG.

When the broadcasting station name determination routine starts in steps,
First, after the current position of the step vehicle is detected by the GPS 18, the broadcasting station name and coordinates corresponding thereto are searched in the data of the storage means (RAM) 20d based on the frequency signal from the radio receiver 12 in step. It Then, it is determined in step whether or not there is a corresponding broadcasting station in the stored data. If it is determined that it is not a step, the process returns to the main routine via the return step. However, if it is determined that there is a corresponding broadcasting station name, it is determined in the step whether the number is one or more In the case of, a process of selecting one is performed.

In selecting a broadcasting station, the detection data of the current position obtained in step and the distance to each broadcasting station are calculated in step, and one of the broadcasting stations closest to each step is selected.

The broadcasting station name selected in this manner is displayed on the display means 14 in steps.

Further, when there is one broadcasting station corresponding to the frequency signal at the step, the broadcasting station name is displayed by jumping to the step without going through the selection procedure described above.

When the display of the broadcasting station name is completed, the process returns to the main routine in step.

In the above embodiment, the case where the selected broadcasting station name is displayed on the display means 14 such as a CRT has been described. However, the radio receiver 12 is provided with a liquid crystal display portion or the like, and the display means of the vehicle running guide means 10 is displayed. It is of course possible to display the broadcasting station name separately from 14.

Further, in the above-mentioned embodiment, when there are a plurality of broadcasting stations of the same frequency, the means for calculating the distance between the current position and the broadcasting station and selecting any one of them has been exemplified. The present invention is not limited to this. For example, the broadcasting stations are divided for each broadcasting area and stored in the RAM 20d so that a plurality of stations do not overlap with each other. One broadcast station may be automatically selected by the signal.

<< Effects of the Invention >> As described in detail above with reference to the embodiments, in the vehicle receiver according to the present invention, the vehicle guidance device and the radio receiver are combined to change the broadcasting station name. The name of the broadcasting station is stored in association with the frequency, and the name of the broadcasting station is selected and displayed based on the current position of the vehicle. Therefore, the name of the broadcasting station can be easily displayed without any troublesome manual operation.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of the device of the present invention, FIG. 2 is a block diagram showing the overall configuration of an embodiment of the device of the present invention, FIG. 3 is an explanatory view of the principle of the GPS system, and FIG. 4 is a processing procedure. It is a flowchart which shows an example. 10 ... Travel guidance device, 12 ... Radio receiver 14 ... Display means, 16 ... Storage means 18 ... Current location detection means 20 ... Control means

Claims (1)

[Claims] 1. In a vehicle having a current position detecting means for detecting the current position of the vehicle and equipped with a traveling guidance device for guiding the vehicle to a set target location and a radio receiver, the frequency of each broadcasting station and the frequency And a frequency detecting means for detecting a receiving frequency currently received by the radio receiver, and a detecting means for detecting the receiving frequency. Station name selection means for selecting any station name in the storage means based on the signal and the current position of the vehicle detected by the current location detection means, and a display for displaying the station name specified by the selection means as character information A receiving device for a vehicle, comprising: