CN204130187U - A kind of embedded vehicle mounted MP 3 Play System - Google Patents
A kind of embedded vehicle mounted MP 3 Play System Download PDFInfo
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- CN204130187U CN204130187U CN201420559441.0U CN201420559441U CN204130187U CN 204130187 U CN204130187 U CN 204130187U CN 201420559441 U CN201420559441 U CN 201420559441U CN 204130187 U CN204130187 U CN 204130187U
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Abstract
The utility model discloses a kind of embedded vehicle mounted MP 3 Play System, comprise MCU module, the radio module be connected with MCU module, key-press module, display module, USB/SD module, and being respectively the power module that modules in system powers, the output terminal of described radio module, USB/SD module is connected with power amplifier module by preposition audio module; Described radio module adopts SI4730 radio chip, can receive FM and AM reception signals, have desirable radio reception effect; Described power module changes 24V into 12V and changes 9V, 5V, 3.3V into again, a 5A resettable fuse of connecting in 24V circuit, and when the electric current passed through is greater than 5A, its internal resistance can slowly raise, until disconnect completely; If electric current is much larger than 5A, then immediately disconnects, work as failture evacuation afterwards, after electric current is less than 5A, it in 1 minute, can be in conducting state again.
Description
Technical field
The utility model relates to a kind of embedded vehicle mounted MP 3 Play System, belongs to vehicle mounted MP 3 play-back technology field.
Background technology
On the run, people generally can play music or broadcast listening with relieving fatigue by vehicle mounted MP 3, loosen mood.At present, be applied in the embedded vehicle mounted MP 3 Play System in automobile, mainly there is following several defect:
1, function is comparatively single: because on car, the radio reception effect of AM medium wave is unsatisfactory, causing the vehicle mounted MP 3 Play System in a lot of car for saving cost, eliminating AM function, only supporting FM radio reception; Popular due to USB, existing vehicle mounted MP 3 is often only supported to play music by USB, for as this kind of memory device of SD card, just needs morely to prepare a card reader and could play;
2, player is owing to installing short circuit, all kinds of problem such as aging in very long life cycle, there will be blown fuse phenomenon, and existing vehicle mounted MP 3 Play System can only change fuse after blown fuse could continue use.
In view of this, the present inventor studies this, and develop a kind of embedded Carrier MP 3 Player using resettable fuse specially, this case produces thus.
Utility model content
The purpose of this utility model is to provide a kind of feature richness, reliable embedded vehicle mounted MP 3 Play System of powering.
To achieve these goals, solution of the present utility model is:
A kind of embedded vehicle mounted MP 3 Play System, comprise MCU module, the radio module be connected with MCU module, key-press module, display module, USB/SD module, and being respectively the power module that modules in system powers, the output terminal of described radio module, USB/SD module is connected with power amplifier module by preposition audio module; Described radio module adopts SI4730 radio chip, can receive FM and AM reception signals, have desirable radio reception effect; Described power module changes 24V into 12V and changes 9V, 5V, 3.3V into again, a 5A resettable fuse of connecting in 24V circuit, and when the electric current passed through is greater than 5A, its internal resistance can slowly raise, until disconnect completely; If electric current is much larger than 5A, then immediately disconnects, work as failture evacuation afterwards, after electric current is less than 5A, it in 1 minute, can be in conducting state again.
As preferably, described MCU module adopts ATS2800 main control chip.
As preferably, described key-press module is made up of some touch-switchs and different valued resistor, and because resistance is different, the size of current flowed through when causing button to press rear formation path is different, MCU module with this judge to press as which button.
As preferably, described USB/SD module comprises USB interface and SD interface, is first play through MCU module decoding by the data of USB interface and the input of SD interface again.
As preferably, described power amplifier module is made up of TDA7388 and peripheral circuit thereof, forms 4 sound channels and exports.
As preferably, described display module is made up of LCD and the resistance, filter capacitor etc. that are connected with LCD, and after input voltage, LCD backlight is bright, according to the truth table of liquid crystal display, MCU module by sending steering order to LCD, the display needed for realization.
As preferably, described preposition audio module is made up of TDA7313 chip and peripheral circuit thereof.
Above-mentioned embedded vehicle mounted MP 3 Play System principle of work: power module is powered to MCU module, MCU module is started working after meeting condition of work, if MCU module detects the trigger pip of USB/SD, then send control signal, play MP3 music file in USB flash disk/SD card, decoded sound outputs to loudspeaker by preposition audio module, power amplifier module, shows corresponding content by controlling display module on LCD simultaneously.Adopt the embedded vehicle mounted MP 3 Play System of said structure can support AM radio reception and FM radio reception, USB plays and SD card is play, diverse in function, simple operation, and Consumer's Experience sense is better simultaneously; And, by increasing by a 5A resettable fuse in power module, ensure that the power supply reliability of whole Play System.
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the vehicle mounted MP 3 Play System module frame chart of the present embodiment;
Fig. 2 is the vehicle mounted MP 3 Play System MCU module circuit diagram of the present embodiment;
Fig. 3 is the vehicle mounted MP 3 Play System power module circuitry figure of the present embodiment;
Fig. 4 is the vehicle mounted MP 3 Play System radio module circuit diagram of the present embodiment;
Fig. 5 is the vehicle mounted MP 3 Play System USB module circuit diagram of the present embodiment;
Fig. 6 is the vehicle mounted MP 3 Play System power amplifier modular circuit figure of the present embodiment;
Fig. 7 is the vehicle mounted MP 3 Play System display module circuit diagram of the present embodiment.
Embodiment
As shown in Figure 1, a kind of embedded vehicle mounted MP 3 Play System, comprise MCU module 1, the radio module 2 be connected with MCU module 1, key-press module 3, display module 4, USB/SD module 5, and being respectively the power module that modules in system powers, the output terminal of described radio module 2, USB/SD module 3 is connected with power amplifier module 7 by preposition audio module 6; Power module is powered to MCU module 1, MCU module 1 is started working after meeting condition of work, if MCU module 1 detects the trigger pip of USB/SD, then send control signal, play MP3 music file in USB flash disk/SD card, decoded sound outputs to loudspeaker by preposition audio module 6, power amplifier module 7, shows corresponding content by controlling display module 4 on LCD simultaneously.
As shown in Figure 2, described MCU module 1 is made up of ATS2800 chip and peripheral circuit thereof, and when MCU module 15V pin receives 5V voltage, ACC_DET is in low level, RESET pin is in low level state, and under crystal oscillator provides reference frequency situation, MCU module 1 is started working.
As shown in Figure 3, described power module is connected the resettable fuse of a 5A on B+ circuit, and when the electric current passed through is greater than 5A, its internal resistance can slowly raise, until disconnect completely; If electric current is much larger than 5A, then immediately disconnect; Work as failture evacuation afterwards, after electric current is less than 5A, it in 1 minute, can be in conducting state again.When connecting B+ line, B+24V obtains B+12V by 78M12, and it obtains SYS5V by 78M05 again.After ACC24V energising, 8050 triode ON, ACC_DET becomes low level, and now MCU satisfies condition and normally works.MCU exports POW_3V3, and on the one hand for radio module is powered, the on-off circuit consisted of triode 3407 and 8050 on the other hand obtains POWER+12V; The another aspect of POWER+12V obtains POW9V by 78M09, and the on-off circuit consisted of 3407 triodes and 8050 triodes together with SYS5V with ACC24V on the other hand obtains ACC5V, powers to USB; Power module carries out filtering by commutation diode IN4001 rectification and ring-shaped inductors, RC filtering circuit simultaneously.
As shown in Figure 4, described radio module is formed, by 3.3V power voltage supply primarily of SI4730 and peripheral circuit thereof.After antenna receives signal, FM signal and AM signal is obtained after different LC filtering circuit filtering, it enters the first pin and the tripod of SI4730 respectively, being exported by the 9th and the 10th pin after demodulation is left and right acoustic channels voice signal, FM and AM reception signals can be received, there is desirable radio reception effect.
Described USB/SD module comprises USB interface and SD interface.Wherein, as shown in Figure 5, described in comprise USB interface totally 4 pins, wherein the first pin powers pin by 5V power voltage supply, the 4th pin ground connection.Data are sent to ATS2800 chip by USBDP, USBMD bipod, and are decoded by it.Decoded voice signal, is exported by the 12nd and the 13rd pin of MCU.
As shown in Figure 6, described power amplifier module is made up of TDA7265 chip and peripheral circuit thereof, by 9V power voltage supply.TDA7268 can the quadraphonic input, and has mute function.Under normal circumstances, MUTE high level, is in non-mute state, when needs are quiet, MCU module 1 sends the MUTE-IN of high level, makes triode Q1 S8050 conducting, thus make Q7 S8050 collector have electric current to pass through also conducting, when now MUTE pin is then in low level, be in mute state.
Be illustrated in figure 7 display module of the present utility model, its LCD pin is directly connected with MCU, by CE, DATA, CLK 3 pin and MCU carry out data transmission, and according to the truth table of liquid crystal display, realize the display of relational graph.
Above-described embodiment and graphic and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field, to its suitable change done or modification, all should be considered as not departing from patent category of the present utility model.
Claims (7)
1. an embedded vehicle mounted MP 3 Play System, it is characterized in that: comprise MCU module, the radio module be connected with MCU module, key-press module, display module, USB/SD module, and being respectively the power module that modules in system powers, the output terminal of described radio module, USB/SD module is connected with power amplifier module by preposition audio module; Described radio module adopts the SI4730 radio chip that can receive FM and AM reception signals; Described power module changes 24V into 12V and changes 9V, 5V, 3.3V into again, and a 5A resettable fuse of connecting in 24V circuit, when the electric current passed through is greater than 5A, its internal resistance can slowly raise, until disconnect completely; If electric current is much larger than 5A, then immediately disconnects, work as failture evacuation afterwards, after electric current is less than 5A, it in 1 minute, can be in conducting state again.
2. a kind of embedded vehicle mounted MP 3 Play System as claimed in claim 1, is characterized in that: described MCU module adopts ATS2800 main control chip.
3. a kind of embedded vehicle mounted MP 3 Play System as claimed in claim 1, is characterized in that: described key-press module is made up of some touch-switchs and different valued resistor.
4. a kind of embedded vehicle mounted MP 3 Play System as claimed in claim 1, is characterized in that: described USB/SD module comprises USB interface and SD interface, is first play through MCU module decoding by the data of USB interface and the input of SD interface again.
5. a kind of embedded vehicle mounted MP 3 Play System as claimed in claim 1, is characterized in that: described power amplifier module is made up of TDA7388 and peripheral circuit thereof, forms 4 sound channels and exports.
6. a kind of embedded vehicle mounted MP 3 Play System as claimed in claim 1, is characterized in that: described display module is made up of LCD and the resistance, filter capacitor etc. that are connected with LCD.
7. a kind of embedded vehicle mounted MP 3 Play System as claimed in claim 1, is characterized in that: described preposition audio module is made up of TDA7313 chip and peripheral circuit thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420559441.0U CN204130187U (en) | 2014-09-26 | 2014-09-26 | A kind of embedded vehicle mounted MP 3 Play System |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420559441.0U CN204130187U (en) | 2014-09-26 | 2014-09-26 | A kind of embedded vehicle mounted MP 3 Play System |
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| CN204130187U true CN204130187U (en) | 2015-01-28 |
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| CN201420559441.0U Active CN204130187U (en) | 2014-09-26 | 2014-09-26 | A kind of embedded vehicle mounted MP 3 Play System |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108920166A (en) * | 2018-07-17 | 2018-11-30 | 浙江中科领航汽车电子有限公司 | A kind of liquid crystal instrument for automobile upgrade method and system |
| CN110634514A (en) * | 2019-08-07 | 2019-12-31 | 惠州市德赛西威汽车电子股份有限公司 | Low-cost sound driving system and method |
-
2014
- 2014-09-26 CN CN201420559441.0U patent/CN204130187U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108920166A (en) * | 2018-07-17 | 2018-11-30 | 浙江中科领航汽车电子有限公司 | A kind of liquid crystal instrument for automobile upgrade method and system |
| CN110634514A (en) * | 2019-08-07 | 2019-12-31 | 惠州市德赛西威汽车电子股份有限公司 | Low-cost sound driving system and method |
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