CN2651893Y

CN2651893Y - Multifunctional vehicle audio player

Info

Publication number: CN2651893Y
Application number: CN 200320108301
Authority: CN
Inventors: 黄志军
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-21
Filing date: 2003-11-21
Publication date: 2004-10-27
Anticipated expiration: 2013-11-21

Abstract

The utility model discloses a multifunction acoustic player for vehicles, which comprises a mobile hard disk, a control panel, a radiogram circuit, a music disk phonograph circuit (a CD player circuit), a magnetic tape deck circuit, a volume regulating circuit, and a power amplifying circuit, etc., and is characterized in that: the mobile hard disk player circuit is composed of a USB interface circuit, a central processing circuit, a decoding circuit, a digital-analog switching circuit and a random memory circuit. By adopting the mobile hard disk (USB disk) as a song carrier, the utility is capable of organically integrating a mobile hard disk, an USB interface circuit, a central processing circuit, a decoding circuit and a digital-analog switching circuit with a current vehicle acoustic circuit, and has the advantages of large program storage capacity, abundant acoustic source, no impact from vibration, and stable playing, except functions of radiograph, music disk playing and magnetic tape playing.

Description

Multifunctional vehicle sound equipment player

Technical field

The utility model relates to automotive acoustics, especially relates to a kind of multi-functional multifunctional vehicle sound equipment player with removable hard disk (USB flash disk).

Background technology

The sound equipment player that existing automobile is used is divided into two big classes: tape player and laser player (being divided into: CD, VCD, DVD etc.).Automobile-used sound equipment player is specialized on the automobile and is used, and owing to can produce vibration in the vehicle traveling process, so existing automobile audio player has some critical defects: 1, tape player is in technology and the requirement to tonequality, and tape is play owing to lower tone, magnetic head is easily dirty and tape technologies will be tending towards superseded on the sound equipment Hi-Fi technique.2, the laser player is owing to be by the laser-bounce reading of data, and mechanical drive is arranged in the machine, so antivibration effect extreme difference can cause the interruption of music in the playing process or picture; The laser disc of the usefulness of playing can can't be play when serious owing to after repeatedly using, cut can occur; Automobile-used compact disc player (CD player) often adopts the DVD multidisc storage to play as enlarging memory space (the first song of CD disc storage 10-12), and the machine price is high; The life-span of laser head is short.

Summary of the invention

But the purpose of this utility model is to provide a kind of new audio-visual broadcast form of carrier, have that the program storage amount is big, source of sound abundant, be not subjected to vibration effect, play stable and radio reception, play the multifunctional vehicle sound equipment player with removable hard disk of tape and music CD (CD).

The purpose of this utility model is achieved in that the utility model comprises removable hard disk, control panel, receiver circuit, music CD phonograph circuit (CD player circuit), magnetic tape station circuit, volume control circuit, power amplifier, power circuit and loudspeaker, control panel is provided with the control button, feature is also to comprise portable hard drive player circuit, and portable hard drive player circuit is made up of USB (universal serial bus) (USB) interface circuit, central processing circuit, decoding circuit and D/A converting circuit.The user presses the selection key in the control button, select music playing mode (removable hard disk play mode), central processing circuit is by the USB (universal serial bus) circuit search and read corresponding data in the removable hard disk, after handling, central processing circuit delivers to the decoding circuit decoding, deliver to D/A converting circuit after the decoding and carry out digital-to-analog conversion, play back by loudspeaker after amplifying through volume control circuit adjusting, power amplifier through the binaural audio signal after the digital-to-analog conversion.

Portable hard drive player circuit also comprises memory circuit at random.

The utility model is to have additional on the basis of common automobile-used sound equipment player by the USB (universal serial bus) circuit, central processing circuit, decoding circuit, the portable hard drive player circuit that D/A converting circuit is formed, it adopts removable hard disk (USB flash disk) as the song carrier, with removable hard disk, the USB (universal serial bus) circuit, central processing circuit, decoding circuit, D/A converting circuit and existing automobile audio circuit organically combine, remove radio reception with common automobile-used sound equipment player, outside the functions such as playing back music CD and tape, also have following advantage:

1, online audio compression form programs such as (MP3, WMA) is very abundant, and following carried convenient, so source of sound is abundant;

2, along with development of science and technology, the storage space of USB flash disk can continue to increase, thus in USB flash disk not only the song of storage can get more and more, and can store the multi-section film; (USB flash disk with present 256M is an example, and it can store the sound equipment program of 68 first MP3 format or the sound equipment program of nearly 300 first Microsoft's Window media compression formats (WMA form), has the USB flash disk of 1G even 10G future.)

3, with the sound equipment program of MP3 or the compression of WMA form, can satisfy the requirement of automobile-used sound equipment fully;

There is not mechanical drive during 4, owing to broadcast, thus be not subjected to vibration effect, and play stable;

5, security of products, reliability and stability height, storage file is not fragile;

6, low production cost.

Description of drawings

Fig. 1 is a circuit block diagram of the present utility model;

Fig. 2 is USB (universal serial bus) circuit, power circuit, the circuit theory diagrams of memory circuit at random;

Fig. 3 is the circuit theory diagrams of central processing circuit, decoding circuit and D/A converting circuit.

Embodiment

Below in conjunction with embodiment and contrast accompanying drawing the utility model is described in further detail.

Embodiment 1:

The utility model is made up of removable hard disk, portable hard drive player circuit, control panel, receiver circuit, music CD phonograph circuit (CD player circuit), magnetic tape station circuit, volume control circuit, power amplifier, power circuit and loudspeaker.

Portable hard drive player circuit is again by the USB (universal serial bus) circuit, central processing circuit U4, decoding circuit U2, D/A converting circuit U3 forms, wherein the USB (universal serial bus) circuit is by connector J2, resistance R 1, R2, capacitor C 1, inductance L 1 is formed, data communication end 2 pin and the resistance R 2 of connector J2, connector JP1 27 28 pin, after connecting successively, resistance R 3 connects signal input part 57 pin of central processing circuit U4, data communication end 3 pin and resistance R 1, connector JP1 25 26 pin, after connecting successively, resistance R 4 connects signal input part 56 pin of central processing circuit U4, ground connection after shell end 5 pin are connected with inductance L 1.

The data output end 44 of central processing circuit U4,45 pin, signal controlling end 52,54 pin connect the data input pin 3 of decoding circuit U2 respectively, 4 pin,

signal controlling end

32,30 pin, the signal controlling end 19 of central processing circuit U4,20,59 pin connect the signal controlling end 14 of D/A converting circuit U3 respectively, 13,15 pin, data output end 24 pin of decoding circuit U2, signal controlling end 25,26,38 pin connect data input pin 2 pin of D/A converting circuit U3 respectively,

signal controlling end

1,3,16 pin, the signal output part 8 of D/A converting circuit U3,9 pin respectively with capacitor C 2, connect volume control circuit after the C3 series connection.

Control panel is by power button S1, four kinds of mode of operation selection key S2, play by strong SW1, selected songs are down by strong SW2, press strong SW3 on the selected songs, transfer big volume by strong SW4, turning volume down forms by strong SW5 and other element, the termination power plug J1 of power button S1, the public input end of four kinds of mode of operation selection keys of another termination S2, four output terminals of four kinds of mode of operation selection key S2 receive the sound machine circuit respectively, music CD phonograph circuit, magnetic tape station circuit and portable hard drive player circuit, receiver circuit, music CD phonograph circuit, the output terminal of magnetic tape station circuit and portable hard drive player circuit all connects volume control circuit, play by strong SW1, selected songs are down by strong SW2, press strong SW3 on the selected songs, transfer big volume by strong SW4, turn an end equal ground connection of volume down by strong SW5, the other end respectively by connector JP1 15 16,17 18,19 20,21 22,23 24 pin connect the button control end 22 of central processing circuit U4,21,9,8,4 pin are play by strong SW1, selected songs are down by strong SW2, press strong SW3 on the selected songs, transfer big volume by strong SW4, turn volume down and be portable hard drive duty control button by strong SW5.

Power circuit is made up of integrated circuit U5-U7, diode D1, connector J1, integrated circuit U5 will by connector J1 come+the 12V supply voltage converts to+5V (VCC) voltage, integrated circuit U6 general+5V (VCC) voltage transitions one-tenth+3.3V (VDD) voltage, whether integrated circuit U7 is used for detection+3.3V (VDD) voltage and exists, and resets for other integrated circuit as not existing by the output reset signal.

Central processing circuit U4 contains memory circuit at random.

The course of work:

The user selects radio reception, playing back music CD, tape or MP3 music by four kinds of mode of operation selection key S2.When user's desire is listened the MP3 music, earlier USB (universal serial bus) (USB) equipment (as the USB device such as hard-disk cartridge in removable hard disk, charged source) is inserted among the connector J2 of USB (universal serial bus) circuit, press power button S1 then, again four kinds of mode of operation selection key S2 are pulled out portable hard drive player pattern, integrated regulator U5 gets electric generation+5V (VCC) voltage, integrated circuit U7 is used for detection+3.3V (VDD), and central processing circuit U4, decoding circuit U2, D/A converting circuit U3 start working.

When pressing MP3 duty control button, central processing circuit U4 is by the USB (universal serial bus) circuit search and read corresponding data in the removable hard disk, after handling, central processing circuit U4 delivers to decoding circuit U2 decoding, deliver to D/A converting circuit U3 after the decoding and carry out digital-to-analog conversion, play back by loudspeaker after amplifying through volume control circuit adjusting, power amplifier through the binaural audio signal after the digital-to-analog conversion.

Embodiment 2:

The circuit of embodiment 2 is substantially the same manner as Example 1, difference is: portable hard drive player circuit also comprises memory circuit U1 at random, the address end 11-4 of memory circuit U1 at random, 29,28,24,27,3,30,31,2 pin (A0-A15) are by connector JP1, JP2 connects the address end 48 of central processing circuit U4 respectively, 47,35,34,32-30,27,16,13-10,64-62 pin, the data I/O end 13-15 of memory circuit U1 at random, 18-22 pin (Q0-Q7) connects the data I/O end 37 of central processing circuit U4 respectively by connector JP2,36,18,17,2,1,51,50 pin.

Do not contain memory circuit at random in the central processing circuit U4.

Claims

1, a kind of multifunctional vehicle sound equipment player, comprise removable hard disk, control panel, receiver circuit, music CD phonograph circuit, the magnetic tape station circuit, volume control circuit, power amplifier, power circuit and loudspeaker, it is characterized in that: also comprise portable hard drive player circuit, portable hard drive player circuit is by the USB (universal serial bus) circuit, central processing circuit (U4), decoding circuit (U2), D/A converting circuit (U3) is formed, wherein the USB (universal serial bus) circuit is by connector (J2), resistance (R1, R2), electric capacity (C1), inductance (L1) is formed, data communication end (2) pin of connector (J2) and resistance (R2), (27 28) pin of connector (JP1), after connecting successively, resistance (R3) connects signal input part (57) pin of central processing circuit (U4), data communication end (3) pin and resistance (R1), (25 26) pin of connector (JP1), after connecting successively, resistance (R4) connects signal input part (56) pin of central processing circuit (U4), ground connection after shell end (5) pin is connected with inductance (L1); The data output end (44 of central processing circuit (U4), 45) pin, signal controlling end (52,54) pin connects the data input pin (3 of decoding circuit (U2) respectively, 4) pin, signal controlling end (32,30) pin, the signal controlling end (19 of central processing circuit (U4), 20, (59) pin connects the signal controlling end (14 of D/A converting circuit (U3) respectively, 13,15) pin, data output end (24) pin of decoding circuit (U2), signal controlling end (25,26,38) pin connects data input pin (2) pin of D/A converting circuit (U3) respectively, signal controlling end (1,3,16) pin, the signal output part (8 of D/A converting circuit (U3), 9) pin respectively with electric capacity (C2, C3) connect volume control circuit after the series connection.

2, multifunctional vehicle sound equipment player as claimed in claim 1, it is characterized in that: portable hard drive player circuit also comprises memory circuit (U1) at random, address end (the 11-4 of memory circuit (U1) at random, 29,28,24,27,3,30,31,2) pin is by connector (JP1, JP2) connect the address end (48 of central processing circuit (U4) respectively, 47,35,34,32-30,27,16,13-10,64-62) pin, at random memory circuit (U1) data I/O end (13-15,18-22) pin connects the data I/O end (37 of central processing circuit (U4) respectively by connector (JP2), 36,18,17,2,1,51,50) pin.