JPS58133045A - Manual selecting system of channel - Google Patents

Abstract

PURPOSE:To set optionally the tuning frequency of a radio receiver by means of a remote controller, by providing a control CPU at a lower place of an audio CPU to control each audio device. CONSTITUTION:An on-vehicle audio system is constituted of a remote controller 10, a center console part 20 and a trunk room part 30. The part 20 includes an audio CPU 21, gives an integrating control to various types of audio devices, a receiving iC 22 which receives a signal from the controller 10, etc. While the part 30 contains an electronic tuning type radio receiver 31, a control CPU 32 which controls the receiver 31 by an indication of the CPU 21, etc. In such a constitution, the tuning frequency of the receiver 31 can be set optionally by operating a ten-key at the side of the controller 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an in-vehicle system in which a dedicated control CPU for controlling individual audio devices is arranged below an audio CPU that centrally manages audio-related devices.
This invention relates to a manual tuning method that sets the tuning frequency of a radio receiver based on instructions from a remote controller.

In recent years, in-vehicle audio and audio systems have become more and more multi-functional, and the capacity of the devices has increased accordingly, so only the parts necessary for operation are placed in the center console near the driver's seat, and the rest of the system is There is a tendency to store these parts in the trunk to make effective use of the limited space inside the car. The present invention enables such a system to arbitrarily set the tuning frequency of the radio receiver by instructions from a remote controller.

In the present invention, an audio CPU for central control is arranged in the center console section, a radio receiver and a control CPU are arranged in the trunk section, and the audio CPU is arranged in the trunk section.
In a manual tuning system for an in-vehicle audio system in which the control CPU receives instructions from a PU and controls the radio receiver, the remote controller is equipped with operation keys that give various instructions to the audio CPU. This book is characterized in that the remote control is capable of arbitrarily setting the open leg frequency of the radio receiver using the numeric keypad on one side. This will be explained in detail.

FIG. 1 is a schematic diagram of an in-vehicle audio system showing an embodiment of the present invention, in which 10 is a remote controller, 20 is a center console section, and 50tri trunk section. The center console section 20 includes an audio CPU 21 that centrally manages various audio-related devices, and a reception CPU 21 that receives signals from the remote controller 10.
c22, a display device 23 such as an LCD or fluorescent display tube used commonly for various displays, and a cassette deck 24 where the main body of the cassette is exceptionally installed since it is necessary to insert and remove the cassette. It will be done. The cassette deck 24 includes a control microcomputer called a deck controller and a deck body. The deck controller receives instructions from the audio CPU 21 and controls the deck body. The trunk room section 30 is equipped with an electronically tuned radio receiver 31, a control CPU 32 that controls the radio receiver 31 according to instructions from the audio CPU 21, and the like.

In addition to this, there is also an amateur radio machine (R) in the trunk room.
AM) 30' etc. are arranged, and this is also audio CPU2.
be placed under the control of 1. The transmission line L1 between the remote controller 10 and the center console section 2o may be a wire (including an optical fiber) or may be wireless using infrared light or the like.

Further, the console section 20 and the trunk room section 3o are connected by an optical fiber L8, and serial communication is performed between them.

Figure 2 is an outside view of the remote controller 10;
are various mode keys, 12 is a numeric keypad, and the others are various function keys. FIG. 5 is a diagram showing the hardware configuration of the remote control unit 210 and the partial configuration of the input stage of the center controller unit 20. The remote controller 10 has a key matrix KM in which various keys shown in FIG. 2 are arranged in a matrix.
, a transmission control IC that converts the switch (SW) signal into a PPM (pulse phase modulation) signal code, and the PPM
A converter CONVs is provided for converting the signal code into an optical signal.

The console unit 20 includes a converter CONV in the input stage for inversely converting the received optical signal into an electrical signal, and its output PPM
The signal code is converted by the receiving IC 22. For reception 1
The C22 has a total of 8-bit parallel output, but in the example shown in Figure 3, the upper 4 bits and lower 4 bits and
Divided processing is performed by ML929 and ML926. Table 1-
A and 1-B show the relationship between the input signal code (PPM signal code) and output signal code of the receiving IC 22 corresponding to various keys of the remote controller 0.

Fig. 4 shows the operation diagram for manual channel selection in the system shown in Fig. 1, and Figs.
The display changes are shown separately for FM and AM. Manual channel selection is started by turning on the manual (MAN) 8W of the remote controller 12. Of course, before doing this, it is necessary to turn on the power using the POWER button on the mode key 11 and set it to radio mode using the RADIO button. After turning on the MAN SW, next is numeric keypad 1.
In step 2, input the desired tuning frequency. The example in Figure 5 is F
In order to receive 85-I MHz of M, keys (8) and (5) of the numeric keypad 12 are inserted in sequence. Door to point (DP) SWt - When pressed, this becomes the FM instruction, and finally, when you press (SET) 8W, rMHxJ
is displayed. Figure 6 is an example of AM reception; in this case, D
P8Wk, f4 also known as lk<fk-12 [rill
Since the lCD mark is input, when 8ETBW is turned on, the display will be AM [rKHiJ will be displayed.

Each process shown in FIG. 4 will be explained in more detail below.

■In the manual (MAN) SW process, (a) clear the manual channel selection user canilia (ARI in Figure 7) to 0, (b) set the manual input mode to AMK,
(e) Cancel the S CAN s preset 5CAN mode, (d) Set the manual mode, (
-) Reset the DPSW input flag. ■In the numeric keypad manual processing, (a) manual channel selection (A
Set the BCD code corresponding to the numerical value on the numeric keypad to Ri). ■In DP SW processing, (a) DP sw
If has already been pressed, return without processing, (b) D
Set the P SW person flag, (C) set the manual input mode to FM, (d) set the numeric keypad person Canilia to FM. ■5 In ETSW processing, (a)
(b) Check whether the input data in the numeric keypad is within the broadcast frequency band. (c) , +E l, if yes, audio CPU 2.
A serial SW multiplication signal is transmitted from 1 to the control CPU 32.

FIG. 7 is an explanatory diagram of this, where (1) is the audio CPU 21
This is the format of the signal transferred from the control CPU 32 to the control CPU 32. A start text STX is added to the beginning of the serial data (text), and a start text ETX and a block check code Bce (horizontal parity) are added to the end.

(b) shows how the BCD code in the numeric keypad Canilia AR1 is converted into a SW code using the SW code table T and stored in the output cover 7A BUFsK, and the contents of the output cover and F are as shown in (a). becomes text. (C) is SW
FIG. 2 is an explanatory diagram of a code table T. ■In the manual display process, as shown in Figure 8, the numeric keypad person Canilia AR1
Intermediate buffer for converting the contents into JIS code and displaying it 7
Store in BUFd. Figure (a) IdAM% (b
) tri FM-r:, this/<, 770 contents are displayed on the display 23 of the SZ diagram.

As described above, according to the present invention, there is provided an in-vehicle distributed processing audio system in which a dedicated control CPU for controlling each audio device is arranged below an audio CPU that centrally manages audio-related devices, and a remote controller. allows you to manually set the radio receiver's tuning frequency from any seat position.

[Brief explanation of the drawing]

Fig. 1 is a professional diagram of an in-vehicle audio system showing an embodiment of the present invention, Figs. 2 and 85 are external views and hard block diagrams of the remote controller, and Fig. 4 is a manual channel selection 70-chart. , Figures 5 and 6 are explanatory diagrams showing key operations on the remote controller and changes in display content, Figure 7 is an explanatory diagram of data sent from the audio CPU to the control CPU, and Figure 8 is an illustration of key input and display. FIG. 1 is a first diagram showing the relationship between data. In the figure, 10 is a remote controller, 12iL numeric keypad, 20 is a center console section, 21 Fi is an audio CPU, 30 is a trunk room section, 51 is a radio receiver, and 62 is a control CPU. Applicant Fujitsu Ten Ltd. Representative Patent Attorney f # Minoru 5 Figure 5 W Display Horse 6 Figure

Claims (1)

[Claims] Audio CPU for centralized control in the center console
In the manual tuning method of an in-vehicle audio system, a radio receiver and a control CPU are arranged in the trunk area, and the control CPU receives instructions from the Mukuro audio CPU and controls the radio receiver. , a remote controller is provided with an operating function that gives various instructions to the audio CPU, and the tuning frequency of the radio receiver can be arbitrarily set using the numeric keypad on the remote controller side. Manual selection method with t% mold.