CN2651059Y

CN2651059Y - Vehicle sound player with movable hard disk

Info

Publication number: CN2651059Y
Application number: CN 200320109205
Authority: CN
Inventors: 黄志军
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-10-21
Filing date: 2003-10-21
Publication date: 2004-10-27
Anticipated expiration: 2013-10-21

Abstract

The utility model discloses an audio player for vehicles with a mobile harddisk, which comprises a mobile harddisk, a control panel with control keys, a receiver circuit, a volume adjusting circuit, a power amplification circuit and a loudhailer. The utility model is characterized in that: the utility model also comprises an interface circuit of a universal serial bus (USB), a central control and decode circuit, a flash memory circuit and a random storage circuit. In addition, the utility model comprises a power detection and supply circuit. Because the mobile harddisk (U disk) is applied to load the songs, the utility model organically integrates the mobile harddisk, the interface circuit of a universal serial bus (USB), the central control and decode circuit, the flash memory circuit and the random storage circuit with the existing car audio circuit, thus has the advantages of being large in program storage, rich in sound source, unable to be affected by vibration and stable in playing.

Description

Automobile-used sound equipment player with removable hard disk

Technical field

The utility model relates to automotive acoustics, especially relates to a kind of automobile-used 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 auto audio equipment 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and tape is play owing to lower tone, magnetic head is easily dirty and tape technologies will be tending towards superseded on the sound equipment Hi-Fi technique.2, the laser player is owing to be to read data by laser-bounce, and in the machine mechanical drive arranged, so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 behind the repeated use, cut can occur; Automobile-used CD-audio player (CD player) often adopts the DVD multidisc storage to play as enlarging storage content (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

The purpose of this utility model is to provide a kind of new carrier audio-visual broadcast form, has that the program storage amount is big, source of sound is abundant, be not subjected to vibration effect, play the stable automobile-used sound equipment player with removable hard disk.

The purpose of this utility model is achieved in that the utility model comprises removable hard disk, control panel, receiver circuit, volume control circuit, power amplifier and loud speaker, control panel is provided with the control button, and feature is also to comprise USB (USB) interface circuit, centring control and decoding circuit, flash memory circuit and memory circuit at random.The user presses the selection key in the control button, select music playing mode (removable hard disk play mode), centring control and decoding circuit are by the USB circuit search and read corresponding data in the removable hard disk, deposit in flash memory circuit respectively by data bus and address bus as required and at random in the memory circuit, call when playing music for centring control and decoding circuit; The binaural audio signal that plays back by centring control and decoding circuit decoding plays back by loud speaker after amplifying through volume control circuit adjusting, power amplifier.

The utility model comprises that also power supply detects and supply circuit.

The utility model is owing to adopt removable hard disk (USB flash disk) as the song carrier, with removable hard disk, USB (USB) interface circuit, centring control and decoding circuit, flash memory circuit and at random memory circuit and existing auto audio equipment circuit organically combine, so 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 theory scheme drawing of the present utility model.

The specific embodiment

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

The utility model is by removable hard disk, USB circuit, centring control and decoding circuit U1, flash memory circuit U2, memory circuit U3, power supply detection and supply circuit, control panel, receiver circuit, volume control circuit, power amplifier and loud speaker are formed at random.

The USB circuit is made up of connector J2, resistance R 7-R13, data communication end 2 pin of connector J2 and signal input part 53 pin that meet centring control and decoding circuit U1 after resistance R 7, R8 connect successively, data communication end 3 pin and signal input part 54 pin that meet centring control and decoding circuit U1 after resistance R 9, R10 connect successively, ground connection after ground terminal 4 pin of connector J2 are connected with resistance R 11, resistance R 12 is connected between the common port and ground of resistance R 7, R8, and resistance R 13 is connected between the common port and ground of resistance R 9, R10.

The address end 17-23 of centring control and decoding circuit U1,26-31,34-38 pin (A0-A17) meets the address end 25-18 of flash memory circuit U2 respectively, 8-1,48,17 pin and the address end 23-26 of memory circuit U3 at random, 29-34,22,35 pin, coupling end 36 pin (NC) (No connection) not, assembly is selected address end 20,21 pin (BA0, BA1) (Bank Select address), column address strobe end 17 pin (CAS) (Column address strobe), row address strobe end 18 pin (RAS) (Row address strobe), the quantitative data input of centring control and decoding circuit U1/mouth 125-128,2-6,9-15 pin (DQ0-DQ15) connects quantitative data input/mouth 29 of flash memory circuit U2 respectively, 31,33,35,38,40,42,44,30,32,34,36,39,41,43,45 pin and quantitative data input/mouth 2 of memory circuit U3 at random, 4,5,7,8,10,11,13,42,44,45,47,48,50,51,53 pin, not coupling end 39 pin (NC) of centring control and decoding circuit U1 and not coupling end 16 pin (NC) that meet flash memory circuit U2 after resistance R 14 is connected, quantitative data input/output shielding end 42 pin (UDQM) (Data input/output mask) connect the quantitative data input of memory circuit U3/output shielding end 39 pin (UDQM) at random, clock end 44 pin (CLK) connect clock end 38 pin (CLK) of memory circuit U3 at random, chip select end 46 pin (CS) connect chip select end 19 pin (CS) of memory circuit U3 at random, chip enable end 50 pin (CE#) (Chip Enable) connect chip enable end 26 pin (CE#) of flash memory circuit U2, clock Enable Pin 56 pin (CKE) (Clock enable) connect clock Enable Pin 37 pin (CKE) of memory circuit U3 at random, that writes that Enable Pin 58 pin (WE#) (Write Enable) meet flash memory circuit U2 writes Enable Pin 11 pin (WE#), output enable end 59 pin (OE#) (Output Enable) connect output enable end 28 pin (OE#) of flash memory circuit U2, the audio signal output end 90 of centring control and decoding circuit U1,91 pin respectively with capacitor C 1, connect the left and right sound track signals input end of volume control circuit after the C2 series connection.

Power supply detection and supply circuit are by integrated regulator U4, U5, aerotron Q, diode D, resistance R 1-R6 forms, the common port of power end 83 pin of centring control and decoding circuit U1 and power end 1 pin of collecting electrode that meets aerotron Q after resistance R 6 is connected and connector J2, the base stage of aerotron Q connects power control terminal 124 pin of centring control and decoding circuit U1, the emitter of aerotron Q connects the anode of diode D, the negative electrode of diode D connects power end 64 pin of centring control and decoding circuit U1, power end 72 pin of centring control and decoding circuit U1 successively with resistance R 3, connect the negative electrode of diode D after the R2 series connection, the power end 77 of centring control and decoding circuit U1,81,89 pin successively with resistance R 1, connect the negative electrode of diode D after the R2 series connection, resistance R 4 is attempted by between the collector and emitter of aerotron Q, resistance R 5 is attempted by between the base stage and emitter of aerotron Q, integrated regulator U4, the input end Vin of U5 all connects contact 1 pin of mode of operation selection key SW2, the output end vo ut of integrated regulator U4 connects the power end 7 of centring control and decoding circuit U1,24,41,119 pin, the output end vo ut of integrated regulator U5 connects the collecting electrode of aerotron Q, and the control end SHDN of integrated regulator U5 connects power supply signal control end 123 pin of centring control and decoding circuit U1.

Control panel is by pressing strong S2 down, suspend by strong S3, broadcast and form the public termination centring control of resistance R 19, R20 and push button signalling control end 82 pin of decoding circuit U1 by strong S4, sound field pattern by strong S5, resistance R 15-R20 by strong S1, selected songs on power button SW1, mode of operation selection key SW2, the selected songs.It is the portable hard drive play mode that mode of operation selection key SW2 pulls out contact 1 pin, pulling out contact 2 pin is radio receiver mode, on the selected songs by under strong S1, the selected songs by strong S2, suspend by strong S3, to play by strong S4, sound field pattern be that the portable hard drive mode of operation is controlled button by strong S5.

Working process:

When user's desire is listened the MP3 music, earlier USB (USB) equipment (as the USB devices such as hard-disk cartridge in removable hard disk, charged source) is inserted among the connector J2 of USB circuit, press power button SW1 then, again mode of operation selection key SW2 is pulled out contact 1 pin, integrated regulator U4 gets the operating voltage of electric generation centring control and decoding circuit U1, and centring control and decoding circuit U1 start working.Whether centring control and decoding circuit U1 detect by power end 83 pin has universal serial bus device to be connected in the USB circuit, if any, then detect outside universal serial bus device whether the 5V operating voltage is provided by power end 83 pin, as do not provide, then power supply signal control end 123 pin are exported high level, make integrated regulator U5 work, output 5V voltage, while power control terminal 124 pin output low levels, make aerotron Q conducting, 5V voltage is exported to outside universal serial bus device power supply, outside universal serial bus device gets electric work, so the corresponding data in the outside universal serial bus device is by the data communication end 2 of connector J2,3 pin are imported the signal input part 53 of centring control and decoding circuit U1 respectively, 54 pin, deposit in flash memory circuit U2 respectively by data bus and address bus as required again, in the memory circuit U3, call during for centring control and decoding circuit U1 broadcast music at random.

When pressing MP3 mode of operation control button, different variations will take place in the voltage on push button signalling control end 82 pin, centring control and decoding circuit U1 be by detecting the situation that these change of voltage judge that respective keys are pressed, thereby make corresponding operatings such as selected songs, playback, time-out, sound field mode converting.The binaural audio signal that plays back by centring control and decoding circuit U1 decoding is through the output of audio signal output end 90,91 pin, through capacitor C 1, C2 send into that volume control circuit is regulated, power amplifier broadcasts to loud speaker after amplifying.

Claims

1, a kind of automobile-used sound equipment player with removable hard disk, comprise removable hard disk, control panel, receiver circuit, volume control circuit, power amplifier and loud speaker, it is characterized in that: also comprise the USB circuit, centring control and decoding circuit (U1), flash memory circuit (U2) and memory circuit (U3) at random, wherein the USB circuit is by connector (J2), resistance (R7-R13) is formed, data communication end (2) pin and the resistance (R7 of connector (J2), R8) connect signal input part (53) pin of centring control and decoding circuit (U1) after the series connection successively, data communication end (3) pin and resistance (R9, R10) connect signal input part (54) pin of centring control and decoding circuit (U1) after the series connection successively, ground connection after ground terminal (4) pin of connector (J2) is connected with resistance (R11), resistance (R12) is connected on resistance (R7, R8) between the common port and ground, resistance (R13) is connected on resistance (R9, R10) between the common port and ground; Address end (the 17-23 of centring control and decoding circuit (U1), 26-31,34-38) pin meets the address end (25-18 of flash memory circuit (U2) respectively, 8-1,48,17) pin and the address end (23-26 of memory circuit (U3) at random, 29-34,22,35) pin, coupling end (36) pin not, assembly is selected address end (20,21) pin, column address strobe end (17) pin, row address strobe end (18) pin, quantitative data input/mouth (125-128 of centring control and decoding circuit (U1), 2-6,9-15) pin connects the quantitative data input/mouth (29 of flash memory circuit (U2) respectively, 31,33,35,38,40,42,44,30,32,34,36,39,41,43,45) pin and the quantitative data input/mouth (2 of memory circuit (U3) at random, 4,5,7,8,10,11,13,42,44,45,47,48,50,51,53) pin, not coupling end (39) pin of centring control and decoding circuit (U1) and not coupling end (16) pin that connects flash memory circuit (U2) after resistance (R14) is connected, quantitative data input/output shielding end (42) pin connects the quantitative data input of memory circuit (U3)/output shielding end (39) pin at random, clock end (44) pin connects clock end (38) pin of memory circuit (U3) at random, chip select end (46) pin connects chip select end (19) pin of memory circuit (U3) at random, chip enable end (50) pin connects chip enable end (26) pin of flash memory circuit (U2), clock Enable Pin (56) pin connects clock Enable Pin (37) pin of memory circuit (U3) at random, that writes that Enable Pin (58) pin connects flash memory circuit (U2) writes Enable Pin (11) pin, output enable end (59) pin connects output enable end (28) pin of flash memory circuit (U2), the audio signal output end (90 of centring control and decoding circuit (U1), 91) pin respectively with electric capacity (C1, C2) connect the left and right sound track signals input end of volume control circuit after the series connection.

2, automobile-used sound equipment player with removable hard disk as claimed in claim 1, it is characterized in that: comprise that also power supply detects and supply circuit, power supply detection and supply circuit are by integrated regulator (U4, U5), aerotron (Q), diode (D), resistance (R1-R6) is formed, the common port of power end (83) pin of centring control and decoding circuit (U1) and power end (1) pin of collecting electrode that connects aerotron (Q) after resistance (R6) is connected and connector (J2), the base stage of aerotron (Q) connects power control terminal (124) pin of centring control and decoding circuit (U1), the emitter of aerotron (Q) connects the anode of diode (D), the negative electrode of diode (D) connects power end (64) pin of centring control and decoding circuit (U1), power end (72) pin of centring control and decoding circuit (U1) successively with resistance (R3, R2) connect the negative electrode of diode (D) after the series connection, the power end (77 of centring control and decoding circuit (U1), 81,89) pin successively with resistance (R1, R2) connect the negative electrode of diode (D) after the series connection, resistance (R4) is attempted by between the collector and emitter of aerotron (Q), resistance (R5) is attempted by between the base stage and emitter of aerotron (Q), integrated regulator (U4, U5) input end (Vin) all connects contact (1) pin of mode of operation selection key (SW2), the mouth (Vout) of integrated regulator (U4) connects the power end (7 of centring control and decoding circuit (U1), 24,41,119) pin, the mouth (Vout) of integrated regulator (U5) connects the collecting electrode of aerotron (Q), and the control end (SHDN) of integrated regulator (U5) connects power supply signal control end (123) pin of centring control and decoding circuit (U1).