JPH01276300A - On vehicle receiver - Google Patents

Abstract

PURPOSE:To easily select a broadcast station having a service area in which a self-vehicle is positioned by storing the station name and frequency data of the broadcast station which can be received at the self-vehicle position detected with a memory, and selectively reading and receiving the frequency data. CONSTITUTION:The position of the self-vehicle is detected by a detecting means, the station name and the frequency data of the broadcast station receivable at the detected self-vehicle position are stored into a memory 29, the frequency data are selectively read by a reception means 1, and a reception action is executed. Thus, according to the change of the receivable broadcast station corresponding to the movement of the vehicle, the data to be read from the memory 29 are selected, the broadcast station in the excellent reception conditions at the self-vehicle position, namely, the broadcast station having the service area in which the self-vehicle is positioned can be received at excellent operability.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention displays a map of an area including the location where the own vehicle is traveling, and displays the location of the own vehicle on the map. The present invention relates to a receiver suitably installed in a car equipped with a so-called navigation device.

Conventional techniques such as frequency modulation broadcasting and television broadcasting are subject to restrictions such as topography due to the nature of radio waves, making it difficult to obtain a wide service area.

For this reason, as the vehicle moves, the vehicle may move out of the service area and become unable to clearly receive radio waves from the broadcasting station that it was previously receiving.

In a typical prior art radio receiver, in the above case, it is necessary to perform a tuning operation and change the preset frequency as necessary, resulting in poor operability.

Therefore, in order to solve this problem, other prior art has put into practical use a receiver equipped with a so-called auto-preset function that scans the reception frequency and automatically presets only the broadcasting stations with a high reception field strength. There is. However, in such a receiver, the above-mentioned scanning takes time, and even though the actual electric field strength is large, such as in the shadow of a building or in a tunnel, the broadcasting station may not be preset.

Furthermore, in order to display broadcast station names, typical prior art radio receivers have memory for each predetermined region.
By storing the broadcasting station name data and its frequency in the memory, and selecting those memories according to the area where the vehicle is traveling, the frequency being received and the stored frequency can be stored. The frequency is compared, and if they match, the name of the broadcasting station stored in the memory corresponding to the frequency is displayed.

Therefore, with such conventional technology, incorrect broadcasting station names may be displayed due to incorrect selection of the region, or when the number of broadcasting stations increases or their frequencies change. J'% has the problem of having to replace the memory.

Problems to be Solved by the Invention It is an object of the present invention to be able to receive broadcasts under good reception conditions with good operability even when the received electric field strength changes as the vehicle moves; To provide an on-vehicle receiver that can accurately display the name of a broadcasting station currently being broadcast.

Means for Solving the Problems The present invention includes a detection means for detecting the position of the own vehicle, and a memory for storing station names and frequency data of broadcast stations receivable at the position of the own vehicle detected by the detection means. . A receiver for use in a vehicle, comprising: receiving means for selectively reading stored contents of the memory and performing a receiving operation based on the position of the own vehicle detected by the detecting means.

According to the present invention, the position of the vehicle is detected by the detection means, and the memory stores station names and frequency data of broadcast stations that can be received at the detected position of the vehicle. The frequency data is selectively read out by the receiving means and a receiving operation is performed.

Therefore, as the receivable broadcast stations change as the car moves, the data read out from the memory is selected, and in this way, the broadcast stations with good reception conditions at the car's position are selected. It is possible to receive broadcast stations whose service area is , with good operability. Furthermore, the name of the broadcasting station can be accurately determined from the received frequency data.

Embodiment FIG. 1 is a block diagram showing a radio receiver 1 according to an embodiment of the present invention and the configuration related to this radio receiver 1. As shown in FIG. This radio receiver 1 is mounted on a car and is used in connection with a navigation device 2 which is a detection means. The navigation device 2 is used in the following manner.

That is, first, in response to an operator's operation from the input means 8, data read out by the decoder 4 from a so-called CDROM 3 in which data as shown in FIG. The drawing data is created in the display control circuit 6 via the display control circuit 6, and this drawing data is displayed as a map on the display section 7 realized by, for example, a cathode ray tube or a liquid crystal display device. The map is displayed in this manner, and when the vehicle position is input from the input means 8, the vehicle position is displayed on the map displayed on the display section 7.

The processing circuit 5 includes a vehicle speed detector 11 , a geomagnetism detector 12 , and a steering detector 13 via an input/output circuit 10 .
etc. are connected, and after the initial information is input as described above, each of these detectors 11
Based on the detection values of ~13, the processing circuit 5
The data is read out from M3 as appropriate, and the display area is changed and the trajectory of the vehicle's position is displayed.

As shown in FIG. 2, the data read from the CDROM 3 is composed of four data D1 to D4, and the data D1 represents the address number of the data. Data D2 represents map management information such as connections with adjacent maps and geomagnetic correction data for the area. Data D3 represents vector data, character codes displayed on the map, and drawings such as color coding. Represents data. Data D4 includes station names of broadcasting stations that can be received within the area stored in the data D3;
and frequency, distribution of received electric field strength, and broadcast station data such as block data used when dividing the map stored in the data D3 into blocks as described later.

Corresponding to such data Dl to D4, a random access memory (hereinafter referred to as
A read-only memory (hereinafter referred to as ROM) 16 is provided for converting the character code in the data D3 into image data. A RAM 17 for temporarily storing image data is provided in association.

On the other hand, in the radio receiver 1, radio waves received by the antenna 21 are tuned by the tuning circuit Irt22, an acoustic signal is extracted by the detection circuit 23, and then amplified by the power amplification circuit 24, and then converted into sound by the speaker 25. Ru. The tuning circuit 22 performs a receiving operation at a frequency corresponding to the control signal from the processing circuit 26, and in conjunction with the processing circuit 26, input means 27 for setting a broadcasting station as described later, and the navigation device 2 are connected to the tuning circuit 22. Two memories are provided for storing broadcast station data provided from the processing circuit 5 via the bus 28.

As shown in FIG. 3, the input means 27 includes a plurality of, for example, five, channel selection keys 81 to s5, a memory key 86,
It is configured to include a memory selection key s7 and a display key S8, and the memory 2 corresponds to the memory selection key S7.
9 are three storage areas Ml, M2 . Consists of M3. In the store area M1, broadcast stations that are frequently received, that is, favorite broadcast stations within the operator's living area are preset by the operator, and in the store area M2, as will be described later, broadcast stations that are received at the receiving point are automatically preset. Broadcasting stations with high received field strength are sequentially reset by 1.

That is, the operator selects the store area M1 by operating the memory selection key s7, and then operates, for example, the channel selection key S1, and selects the frequently received broadcasting station corresponding to this channel selection key S1, i.e. Tune in to your favorite broadcast station among the broadcast stations within the living area of the operator, and press the memory key 86.
By operating , the received frequency of that broadcasting station is stored in the store area M1 in correspondence with the channel selection key S1.

By performing similar operations with respect to the remaining channel selection keys 82 to S5, it is possible to preset frequently received broadcasting stations.

In addition, the two memory storage areas M2. M3 is preset with the frequencies of broadcast stations that can be received at the vehicle's location and their station names as follows. That is, when using the navigation device 2,
First, the input means 8 calls out the data D1 to D4 of the own vehicle position f recall from the CDROM 3, and displays the display unit 7 as shown in FIG. For example, the display key S8 of the input means 27 is divided into 42 blocks of 7×6.
By operating the 9 reference mark Ul-[ on this map
The broadcast station indicated by J9 is displayed. When the vehicle position is inputted from the input means 8 with the broadcast stations U1 to U9 displayed in this manner, the broadcast station data corresponding to the block P1 including the vehicle position indicated by diagonal lines in FIG. 4 is displayed. is read from the CDROMB, and the broadcast station is displayed as indicated by reference numerals U1 to U9 in FIG. Among these broadcast stations U1\U9, broadcast stations that can be received in the block P1, such as Ul,
U7 identifies the remaining unreceivable broadcast stations U2 to U6. υ8. It is displayed to distinguish it from broadcast stations U9, etc., and near the display of the broadcast stations Ul and U7, as shown in FIG. The preset numbers corresponding to ~S5 are displayed, for example, CHI and CH2, and the transmission frequencies and station names of these broadcast stations Ul and 07 are as follows.
The two memory storage areas M2. Each is stored in M3.

In the radio reception file configured as described above, when the display of a broadcasting station is selected by the display key S8, the memory selection key S7 and the station exit keys S1 to S5 are pressed.
When a broadcast station stored in the store area M2 is selected by the operation, the name of the broadcast station is read out from the store area M3 and displayed on the screen together with its transmission frequency. In addition, within the living area of the operator, the store area ML
.

When the stored contents of M2 overlap and the frequency stored in the store area M1 is selected by the memory selection key S7 and the channel selection keys 81 to S5, a search for the corresponding frequency in the store area M2 is performed. After that, the broadcasting station name corresponding to that frequency is read out from the store area M3 and displayed.

In this way, if the frequencies of broadcasting stations that are frequently received, that is, within the living area, stored in the store area M1 are preset, and you move out of the living area,
Frequencies with high received electric field strengths in the area are sequentially stored in the store area M2, and the stored contents are automatically updated as the car moves. Therefore, the operator can receive the broadcast station with the reception conditions at the own vehicle position by simply operating the memory selection key S7 and the channel selection keys 81 to S5, and by operating the display key S8. The station name is displayed, which greatly improves operability and allows the name of the receiving broadcasting station to be displayed accurately.

Furthermore, when storing reception frequencies in the storage area M2, the frequencies are preset in descending order of stored reception electric field strength based on the reception electric field strength data previously stored in the CDROM 3 as described above. For example, in a configuration where the so-called auto scan function is used to sequentially store frequencies starting from the frequencies with the highest actual received field strength at the vehicle's location, even if the received field strength is high at the frequency, the vehicle If such a preset operation is performed when the received electric field strength is temporarily low, such as when driving behind a building or passing through a tunnel, the The radio receiver 1 according to the present invention can solve problems such as not being able to preset the frequency.
In this case, there is no such problem, and the broadcast stations having the highest reception field strength in the block where the host vehicle is located, for example, Pl, are stored in the storage area M2 in order.

Furthermore, even if a new broadcasting station or relay station is established due to the increase in the number of broadcasting stations or relay stations, this can be easily handled by replacing the CDROM 3.

FIG. 5 shows memory M2. 12 is a flowchart for explaining the operation when storing the broadcasting station name and frequency in M3. In step n1, it is determined whether the navigation device 2 is being used, and if so, the process moves to step n2, in which it is determined whether or not the block of the vehicle's position has changed. For example, it is determined whether or not the block indicated by the reference mark P2 has moved from the block indicated by P2, and if so, the process moves to step n3.

In step n3, it is determined whether the radio receiver 1 is being used, and if so, in step n4, the transmission frequency of the broadcasting station in the block where the own vehicle is present is stored in the storage area M2 of the memory 29. The stations with the highest received frequency are stored in the order of frequency, and the name of the broadcasting station corresponding to the stored frequency is stored in memory M3.
Stored in

In step n5, it is determined whether the same frequency data as the frequency data stored in the store area M2 in step n4 is stored in the store area M1. If so, the process moves to step n6, and
The frequency data is associated with the broadcasting station name in the storage area M3, and the process moves to step n7. In step n5, the frequency data stored in the store area M2,
If the frequency data stored in the storage area M1 does not match, the process directly moves to step n7.

In step n7, it is determined whether or not there is station name data of the broadcasting station currently being received. If so, in step n8, the broadcasting station name, its transmission frequency, and preset data as shown in FIG. The channel is displayed and the operation ends.

When the navigation device 2 is not used in step nl, when the block in which the own vehicle is located has not changed in step n2, when the radio receiver [3] is not performing reception operation in step n3, and in step n If there is no station name data of the broadcasting station currently being received in step 7, the direct operation is terminated.3 FIG. 6 is a flowchart for explaining the retrieval operation f% of the contents stored in the two memories. In step q1, it is determined whether the radio receiver 1 is being used, and if so, in step (12) the channel selection keys 81 to S5 are pressed.
It is determined whether or not M1. It is determined whether M2 is selected.

In step q3, when the store area M1 is selected, the process moves to step q4, and the channel selection key 8 operated in step q2 is selected from among the frequency data in the memory M1 preset by the operator as described above.
1 to S5 are read out, the processing circuit 26 controls the tuning circuit 22 in accordance with the frequency data, and in step q5, the processing circuit 26 controls the frequency data corresponding to the storage area M1 in step n6 in FIG. It is determined whether the broadcasting station name is stored in the storage area tfAM3,
If so, the process moves to step 96.

Step (34) If the store area M2 is selected, the process moves to step q7, the frequency data stored in the memory M2 is read out, the tuning operation is performed as described above, and the process moves to step q6. In step q6, as shown in FIG. 4, the name of the currently received broadcasting station, its transmission frequency, and preset channel are displayed, and the operation ends.When the receiving operation is not performed in step q1, When the channel selection keys 81 to S5 are not operated in step q2, and in step q5, the broadcasting station name corresponding to the frequency data stored in the store head area M1 is stored in the store area 14M.
If it is not set to 3, the operation is directly terminated.

Effects of the Invention As described above, according to the present invention, the station names and frequency data of broadcast stations receivable at the detected vehicle position are stored in the memory, and the frequency data can be selectively read. By performing reading and receiving operations, even if the receivable broadcast stations change as the vehicle moves, the frequency data read from the memory is selected in accordance with the vehicle position. Therefore, it is possible to easily select a broadcasting station with good reception conditions based on the vehicle's location, that is, a broadcasting station whose service area is the vehicle's location. It is possible to accurately determine the name of a broadcasting station from the frequency data.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a block diagram showing a radio receiver 1 according to an embodiment of the present invention and its related configuration. 3 is a diagram showing a specific configuration of the input means 27, FIG. 4 is a display example of the display unit 7 when block P1 is selected, and FIGS. 5 and 6 are flowcharts for explaining the operation. It is. 1... Radio receiver, 2... Navigation system, 3... CDROM, 4... Decoder, 5.26
...Processing circuit, 6...Display control circuit, 7...Display unit, 8°27...Input means, 25...Speaker, 2
9...Memory, M1-M3...Store area, U1-
U9... Broadcasting station agent Patent attorney Kei Saikyo Figure 1: 22 Figure 37 /27 / Figure 4

Claims (1)

[Scope of Claims] Detection means for detecting the position of the own vehicle; a memory for storing station names and frequency data of broadcast stations receivable at the position of the own vehicle detected by the detection means; and the detection means. 1. A vehicle-mounted receiver comprising: receiving means for selectively reading the stored contents of the memory and performing a receiving operation based on the position of the own vehicle detected by the means.