JP2000091935A - Onboard receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow an onboard receiver with a navigation function to select a reception frequency at a preferred spot by the user. SOLUTION: The user operates in advance a reception frequency switching condition setting section (operation section) 5 to register and store a reception frequency switching spot, a drive direction and reception frequencies before and after the selection to a memory 4. During driving of a vehicle, a control section 3 acquires current position information and drive direction information from a vehicle position detection section 1a and a drive direction detection section 1b of a navigation section 1, acquires reception frequency information from a broadcast reception section (radio reception section) 2, discriminates whether or not the information is coincident with the reception frequency switching spot, the drive direction and the reception frequencies and replaces the reception frequency of the broadcast reception section (radio reception section) 2 with a setting frequency of after-selection stored in the memory 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle receiver, and more particularly, to an in-vehicle receiver having a navigation function.

[0002]

2. Description of the Related Art In general, an on-vehicle navigation device is
Detects the current position of the vehicle and stores map data in the vicinity on CD
-Read from ROM and display on display screen. A vehicle position mark indicating the vehicle position mark is displayed in the center of the screen, and map data in the vicinity is scrolled around the vehicle position mark in accordance with the traveling direction of the vehicle, and map information around the vehicle position is constantly displayed. Can be understood. Some vehicles are equipped with various kinds of electronic devices such as a radio, a CD, and a TV, in addition to a navigation device, and some of these devices are connected to each other so that they can be easily operated by one operation unit.

A receiving device such as a car radio installed in a vehicle selects and receives a desired broadcasting station from radio waves transmitted from a plurality of broadcasting stations, and broadcasts the received broadcasting into the vehicle. I have. When receiving and listening to a radio broadcast, the user operates a manual tuning key, a seek key, a preset key for calling a previously stored reception frequency, etc. of the operation unit of the reception device to adjust the reception frequency to a desired broadcast frequency, and start broadcasting. I'm listening.

[0004]

Conventionally, when a reception condition deteriorates due to movement of a vehicle while a vehicle is running while receiving a radio broadcasting station, a user operates a manual tuning key, a seek key, a preset key, etc. of an operation unit. Then, the receiving frequency was switched to another receivable broadcasting station. However, it is troublesome to operate the manual tuning key, the seek key, and the preset key of the operation unit every time the reception condition is deteriorated. It is necessary to perform a tuning operation of another broadcasting station every time when passing through the point where the receiving condition of the broadcasting station that has been listened to by the movement of the broadcasting station deteriorates, which is troublesome.

Accordingly, an object of the present invention is to provide a vehicle-mounted receiving apparatus having a navigation function in which a user previously sets a point, a traveling direction of a vehicle, and a broadcasting station before and after switching, and receives a set receiving frequency. It is another object of the present invention to provide an in-vehicle receiver that automatically switches to another set broadcasting station when a vehicle passes a set point in a set direction.

[0006]

According to the present invention, there is provided an in-vehicle receiving apparatus having a navigation function, comprising: a broadcast receiving means for receiving a broadcast; a vehicle position detecting means for detecting a current position of a vehicle; Traveling direction detecting means for detecting a traveling direction of the vehicle, condition setting means for setting a condition for switching a reception frequency of the broadcast receiving means, storage means for storing a switching condition set by the condition setting means,
An in-vehicle receiving apparatus comprising: control means for switching a reception frequency of the radio broadcast receiving means based on a detection result of the vehicle position detecting means, a detection result of the traveling direction detecting means, and a switching condition stored in the storage means. Achieved by That is, the point where the reception frequency is changed, the traveling direction of the vehicle, and the reception frequency of the reception broadcasting station before and after the switching are set in advance as the reception frequency switching condition, and the vehicle sets the setting point while receiving the setting broadcasting station before the switching. When passing in the set direction, the frequency is switched to the set frequency after switching, thereby enabling good reception.

[0007]

(A) Outline of the present invention FIG. 1 is a schematic explanatory view of the present invention. Reference numeral 1 denotes a navigation unit that provides guidance for traveling of the vehicle, and includes a vehicle position detection unit 1a that detects the position of the vehicle and a traveling direction detection unit 1b that detects the traveling direction of the vehicle. 2 is a broadcast receiving unit (radio receiving unit) for receiving radio broadcasts and the like, 3 is a control unit for controlling the entire apparatus, 4 is a memory for storing reception frequency switching points, running directions, reception frequencies before and after the switching, and 5 is a memory. It is a reception frequency switching condition setting unit (operation unit). The user operates the reception frequency switching condition setting unit (operation unit) 5 to store the reception frequency switching conditions such as the reception frequency switching point, the traveling direction, and the reception frequencies before and after the switching in the memory 4 in advance.

The control unit 3 stores the vehicle position and the traveling direction inputted from the vehicle position detecting unit 1a and the traveling direction detecting unit 1b of the navigation unit 1 and the reception frequency received by the broadcast receiving unit 2 in the memory 4. It is determined whether or not the received reception frequency switching point, the traveling direction, and the reception frequency before the switching match, and if they match, the reception frequency of the radio receiving unit is stored in the memory 4 after the switching. Switch to frequency. By doing so, the reception frequency point, traveling direction, and the reception frequency before and after the switching are set in advance as the reception frequency switching condition, and the vehicle passes through the setting point in the setting direction while receiving the set broadcasting station before the switching. In this case, the frequency is switched to the set frequency after switching, thereby enabling good reception.

(B) Configuration of Main Portion of In-Vehicle Receiving Device FIG. 2 is a main portion configuration diagram of the in-vehicle receiving device of the present invention.
Is a navigation unit that guides the vehicle, 2 is a radio reception unit that receives radio broadcasts, 3 is a control unit that controls the entire device, 4 is a radio reception frequency before and after switching, a set point, and a set direction are stored. Reference numeral 5 denotes an operation unit for performing map enlargement / reduction operation, radio reception frequency change operation, various setting operations, and the like, and 6 denotes a display unit for displaying a navigation map, a radio reception frequency, a setting menu, and the like.
The control unit 3 controls the entire apparatus. The control unit 3 stores switching conditions (switching points and the like) for switching the reception frequency of the radio receiving unit 2 in the memory 4, the vehicle current position information input from the navigation unit 1, and traveling. A memory 4 based on the direction information and the reception frequency information input from the radio reception unit 2
Or instructs the radio reception unit 2 to switch the reception frequency at the point stored in the. The memory 4 stores a reception frequency before switching (initial reception frequency), a reception frequency switching point, a traveling direction,
Each of the received frequencies after the switching is stored. The control unit 3, the memory 4, the operation unit 5, and the display unit 6 also serve as corresponding parts of the navigation device 10.

(B-1) Switching Point Registration For example, it is assumed that a user is driving a vehicle while listening to a certain radio broadcast. When the reception condition deteriorates due to an increase in the distance from the broadcasting station due to the movement of the car, the user operates the operation unit 5 at that point to set the reception frequency switching point registration mode. After setting the reception frequency switching point registration mode, the user sets the reception frequency of another receivable broadcasting station to the manual tuning key of the operation unit 5,
Set by operating the seek key, preset station call key, etc. Next, when a setting end operation is performed, the control unit 3 calculates the latitude and longitude and the vehicle traveling direction based on the current position information from the navigation unit 1 and stores them in the memory 4 in correspondence with the reception frequencies before and after the switching. I do.

(B-2) Switching Operation When the vehicle is running in the automatic switching mode by operating the operating section 5 and passing the reception frequency switching point stored in the memory 4, the control section 3 controls the radio receiving section 2 Detects the reception frequency currently being received, and determines whether or not the reception frequency before switching stored in the memory 4 is satisfied. If the reception frequency before the switching is stored in the memory 4, the control unit 3 acquires the latitude and longitude and the vehicle traveling direction of the current position of the vehicle from the navigation unit 1, and the longitude and latitude and the traveling direction are stored in the memory 4. If the coordinates coincide with the latitude and longitude and the traveling direction of the vehicle, the control unit 3 controls the radio reception unit 2 to switch the reception frequency from the initial reception frequency to the set reception frequency after the switching.

(C) System Configuration FIG. 3 is a configuration diagram of a vehicle-mounted receiving apparatus according to the present invention. Reference numeral 10 denotes a navigation device, and 20 denotes a radio receiver for receiving a radio broadcast such as an FM broadcast.
Is provided with a navigation unit 1, a control unit 3, a memory 4, an operation unit 5, a display unit 6, and a bus 7. In the navigation unit 1, reference numeral 11 denotes a CD-ROM for storing map information;
12 is a CD-ROM control unit for controlling reading of data from the CD-ROM, 13 is a map information memory for storing map information read from the CD-ROM, and 14 is a position measuring device for measuring the current position of the vehicle. , A relative azimuth sensor such as a vibrating gyroscope that detects the rotation angle of the vehicle, a distance sensor that generates one pulse for each predetermined traveling distance, a GPS receiver, a position calculation CPU, and the like. Display 6
, 16 is a display controller, and 17 is V
The RAM 18 is a display device. The control unit 3 performs the navigation control and the reception frequency switching control of the present invention. The memory 4 stores the frequency before and after the switching, the traveling direction of the vehicle, and the like together with the reception frequency switching point. The operation unit 5 performs navigation setting operation, screen display switching operation, reception frequency switching point registration, radio reception frequency setting operation, and the like.

(D) Configuration of Radio Receiver FIG. 4 is a configuration diagram of a radio receiver 20 that receives FM broadcasts. 31 is an antenna for receiving FM broadcasting, 32
Is a front end (F / E), and includes a tuning circuit, a high-frequency amplifier circuit, a local oscillator, and a mixer (all not shown).
It consists of. Reference numeral 33 denotes a PLL circuit, and reference numeral 34 denotes a low-pass filter. The PLL circuit 33, the low-pass filter 34, and the local oscillator in the front end 32 constitute an electronic tuning unit, and output an intermediate frequency signal by a mixer in the front end 32. It is supposed to.
An intermediate frequency amplification / FM detector (IF / DET) 35 amplifies and detects the intermediate frequency signal output from the front end 32.

Reference numeral 36 denotes a noise canceller / stereo demodulator (NC / MP) for performing noise cancellation and stereo demodulation.
X), and a stereo audio signal is output from the noise canceller / stereo demodulation circuit 36. Reference numeral 37 denotes a radio control unit configured by a microcomputer, which performs reception control of FM broadcasting, channel selection control, and the like. Furthermore,
When a signal specifying a receiving station is input from the navigation device, the control unit 37 controls the PLL circuit to change the tuning frequency of the front end to the broadcasting frequency of the specified broadcasting station.

(E) Description of Memory FIG. 5 is an explanatory diagram of a memory for storing reception frequency switching conditions. The memory 4 stores an initial reception frequency before switching, a reception frequency switching point, a traveling direction, and a reception frequency after switching, respectively. The point is indicated by latitude and longitude information (x, y) of map information, and directions are stored in 16 directions. The memory 4 stores an initial reception frequency before switching, a reception frequency after switching, and a traveling direction of the vehicle together with the switching point.

FIG. 6 is a diagram showing a processing flow at the time of registering a frequency switching point. Here, while driving while listening to a broadcast of a certain frequency, the reception condition becomes worse due to the movement of the vehicle,
It is assumed that the user registers the switching frequency at that point.

First, the control unit 3 is operated by the user through the operation unit 5.
It is determined whether or not the frequency switching point registration key is pressed (step S101), and if not, it waits until the frequency switching point registration key is pressed. On the other hand, when the frequency switching point registration key is pressed, the control section 3 reads out the current position of the vehicle and the traveling direction of the vehicle from the position measuring device 14 and stores them in the memory 4 (step S102).

Next, the previously received frequency is read out from the radio receiver 20 and stored in the memory 4 as an initial reception frequency corresponding to the vehicle position and the traveling direction (step S103). Then, the user operates the manual tuning key, the seek key, the preset key, and the like of the operation unit 5 to select another receivable frequency (step S104). Thereafter, the control unit 3 stores the reception frequency after the switching in the memory 4 in association with the initial frequency, the vehicle position, and the traveling direction (step S105).

(F) Reception frequency switching processing flow FIG. 7 is a diagram showing a reception frequency switching processing flow of the in-vehicle receiving apparatus of the present invention. Here, the description will be made on the assumption that the reception frequency switching condition such as the reception frequency switching point is set and stored in the memory 4 in advance.

First, the control section 3 determines whether or not the mode is the automatic switching mode (step S201). On the other hand, in the case of the automatic switching mode, the control unit 3 determines whether or not the frequency currently being received by the radio receiver 20 is the initial reception frequency stored in the memory 4 (step S202). If not, the process is exited.

If the frequency currently being received is the initial reception frequency in step S202, the latitude and longitude and the traveling direction are obtained from the position measuring device 14 (step S203). It is determined whether the latitude / longitude of the current position of the vehicle obtained in step S203 is a registered point stored in the memory 4 (step S204). If not, the process returns to step S201 and repeats the subsequent processing. . Step S20
If the current vehicle position is a registered point in step 4, it is determined whether the vehicle traveling direction is the registered direction (step S20).
5) If it is not the registration direction, the process returns to step S201 to repeat the subsequent processing. If the vehicle running direction matches the registered direction in step S205, the control unit 3 switches the receiving frequency of the radio receiver to the switched receiving frequency stored in the memory 4 (step S206).

With the above arrangement, the point where the reception condition deteriorates, the traveling direction and the switching frequency are registered and stored in advance, and the reception frequency is automatically switched when the vehicle passes through the registration point in the registration direction. be able to. Further, since the traveling direction is also registered, the reception frequency is not switched when traveling in the reverse direction at the switching point. In the above description, the broadcast receiving means has been described as an FM broadcast receiver. However, other broadcast receiving means such as an AM broadcast and a TV broadcast may be used.

In the above description, the reception frequency control is performed by the control unit of the navigation apparatus. However, a separate reception frequency control unit can be provided, or the control unit of the radio receiver can control the reception frequency. . As described above, the present invention has been described with reference to the embodiments. However, the present invention can be variously modified in accordance with the gist of the present invention described in the claims, and the present invention does not exclude these.

[0024]

As described above, according to the present invention, the point where the reception condition deteriorates, the traveling direction, and the frequency after switching are registered in advance, and the vehicle is automatically registered when the vehicle passes the registered point. I switched to another reception frequency,
It is convenient to register once a point where the reception condition of a road that passes frequently deteriorates, so that the user does not need to switch the reception frequency every time the user passes the point.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of the present invention.

FIG. 2 is a main part configuration diagram of a vehicle-mounted receiving device of the present invention.

FIG. 3 is a configuration diagram of a vehicle-mounted receiving device of the present invention.

FIG. 4 is a configuration diagram of an FM broadcast receiver.

FIG. 5 is an explanatory diagram of a memory.

FIG. 6 is a diagram showing a processing flow when registering a frequency switching point.

FIG. 7 is a diagram showing a reception frequency switching processing flow.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Navigation part 1a ... Vehicle position detection part 1b ... Running direction detection part 2 ... Radio reception part 3 ... Control part 4 ... Memory 5 ... Reception frequency switching condition setting part

Claims (2)

[Claims] An on-vehicle receiving device having a navigation function, a broadcast receiving means for receiving a broadcast, a vehicle position detecting means for detecting a current position of a vehicle, a traveling direction detecting means for detecting a traveling direction of the vehicle, Condition setting means for setting conditions for switching the reception frequency of the broadcast receiving means; storage means for storing the switching conditions set by the condition setting means; detection results of the vehicle position detection means and the traveling direction detection means. A vehicle-mounted receiving device comprising: a control unit that switches a reception frequency of the broadcast receiving unit based on a detection result and a switching condition stored in the storage unit. 2. As the switching condition, a point at which a receiving frequency is switched, a vehicle traveling direction, and a receiving frequency of a receiving broadcast station before and after the switching are set, and the control unit controls the broadcast receiving unit by using the broadcast receiving unit. 2. The in-vehicle receiving device according to claim 1, wherein when the vehicle passes through a set point in a set direction during reception, the receiving frequency of the broadcast receiving unit is switched to the receiving frequency of the set broadcasting station after the switching.