The onboard wireless data terminal of AUX interface and power supply interface is provided
Technical field
The utility model relates to a kind of vehicle-mounted data terminal, particularly relates to a kind of onboard wireless data terminal providing AUX interface and power supply interface.
Background technology
Existing onboard wireless data terminal only has the external charging port of a 5V, function singleness, does not more have and is connected with the AUX entrance on car, and carry out the function of music, and the onboard wireless data terminal of this function singleness more and more cannot meet the demand of people.
Utility model content
The technical problems to be solved in the utility model be to provide a kind of structure simple, design the onboard wireless data terminal that AUX interface and power supply interface are provided that is ingenious, diverse in function.
The utility model provides the onboard wireless data terminal of AUX interface and power supply interface, wherein, comprise central controller, USB connector, first switching device shifter and the second switching device shifter, first differential signal input of USB connector is connected with the output terminal of the first switching device shifter, the input end of the first switching device shifter is connected with the first usb signal end and the first audio signal output end respectively, second differential signal input of USB connector is connected with the output terminal of the second switching device shifter, the input end of the second switching device shifter is connected with the second usb signal end and the second audio signal output end respectively, first usb signal end, first audio signal output end, second usb signal end is connected with the signal output part of central controller respectively with the second audio signal output end, the control end of the first switching device shifter is connected with control signal output terminal respectively with the control end of the second switching device shifter, control signal output terminal is connected with the control signal output terminal of central controller, USB connector is provided with multiple USB interface.
The utility model provides the onboard wireless data terminal of AUX interface and power supply interface, wherein said first switching device shifter and the second switching device shifter are respectively the first single-pole double-throw switch (SPDT) and the second single-pole double-throw switch (SPDT), the output terminal of the first single-pole double-throw switch (SPDT) is connected with the first differential signal input of USB connector, two input ends of the first single-pole double-throw switch (SPDT) are connected with the first usb signal end and the first audio signal output end respectively, the output terminal of the second single-pole double-throw switch (SPDT) is connected with the differential signal input of USB connector, two input ends of the second single-pole double-throw switch (SPDT) are connected with the second usb signal end and the second audio signal output end respectively.
The utility model provides the onboard wireless data terminal of AUX interface and power supply interface, and the power input access feeder ear of wherein said USB connector, feeder ear is connected with the signal output part of application delivery controller.
The utility model provides the onboard wireless data terminal of AUX interface and power supply interface, the power input of wherein said USB connector is connected by the first wire with between feeder ear, first wire is drawn the second wire, the other end access zero potential point of the second wire, second wire is in series with the 3rd resistance and the second resistance, draw privates between 3rd resistance and the second resistance, the signal output part of application delivery controller and the other end of privates be connected.
The utility model provides the onboard wireless data terminal of AUX interface and power supply interface, and wherein said control signal output terminal draws the 5th wire, and the other end access zero potential point of the 5th wire, the 5th wire is provided with the first resistance.
The utility model provides the onboard wireless data terminal of AUX interface and power supply interface, and the voltage of wherein said feeder ear is 5V.
The utility model provides the onboard wireless data terminal of AUX interface and power supply interface, and the earth terminal of wherein said USB connector accesses zero potential point by privates, and privates are provided with the first inductance.
The utility model provides the onboard wireless data terminal difference from prior art of AUX interface and power supply interface to be: the power input access feeder ear of the utility model USB connector, the first differential signal input and the second differential signal input two pins in the middle of USB connector are connected with the output terminal of the first single-pole double-throw switch (SPDT) and the second single-pole double-throw switch (SPDT) respectively, first single-pole double-throw switch (SPDT) is connected with audio signal output end and signal end respectively with two input ends of the second single-pole double-throw switch (SPDT), central controller is connected with delivery controller network, by delivery controller, central controller judges that input is sound signal or current signal, and send control signal by central controller to control signal output terminal, thus control the first single-pole double-throw switch (SPDT) is be connected with audio signal output end or with usb signal end with the second single-pole double-throw switch (SPDT), thus realize USB connector supplying power for outside and the external dual-use function exporting AUX signal.When having multiple electrical appliance to need to charge, the multiple USB interface in USB connector can be charged to each electrical appliance simultaneously.
The onboard wireless data terminal of AUX interface and power supply interface is provided to be described further below in conjunction with accompanying drawing to the utility model.
Accompanying drawing explanation
Fig. 1 provides the circuit structure diagram of the onboard wireless data terminal of AUX interface and power supply interface for the utility model.
Embodiment
As shown in Figure 1, provide the circuit structure diagram of the onboard wireless data terminal of AUX interface and power supply interface, comprise central controller CPU, USB connector 7, first single-pole double-throw switch (SPDT) 8 and the second single-pole double-throw switch (SPDT) 9.The power input VUSB of USB connector 7 is by the first wire access feeder ear VCC, the voltage of feeder ear VCC is 5V, first wire is drawn the second wire, the other end access zero potential point of the second wire, second wire is in series with the 3rd resistance R3 and the second resistance R2, draw privates between 3rd resistance R3 and the second resistance R2, the other end of privates is connected with the signal output part of application delivery controller ADC.The earth terminal GND of USB connector 7 accesses zero potential point by privates, and privates are provided with the first inductance L 1.First differential signal input DM of USB connector 7 is connected with the output terminal of the first single-pole double-throw switch (SPDT) 8, two input ends of the first single-pole double-throw switch (SPDT) are connected with the first usb signal end USB-DM and the first audio signal output end AUX-R respectively, and the control end of the first single-pole double-throw switch (SPDT) 8 is connected with control signal output terminal SW.Second differential signal outputs DP of USB connector 7 is connected with the output terminal of the second single-pole double-throw switch (SPDT) 9, two input ends of the second single-pole double-throw switch (SPDT) are connected with the second usb signal end USB-DP and the second audio signal output end AUX-L respectively, and the control end of the second single-pole double-throw switch (SPDT) 9 is connected with control signal output terminal SW.First usb signal end USB-DM, the first audio signal output end AUX-R, the second usb signal end USB-DP are connected with the signal output part of central controller CPU respectively with the second audio signal output end AUX-L, control signal output terminal SW is connected with the control signal output terminal of central controller CPU, control signal output terminal SW draws the 5th wire, the other end access zero potential point of the 5th wire, the 5th wire is provided with the first resistance R1.USB connector 7 is provided with multiple USB interface.
Principle of work of the present utility model is: the first audio signal output end AUX-R, the second audio signal output end, the first usb signal end USB-DM are connected with central controller CPU respectively with the second usb signal end USB-DP.When needs carry out music, central controller CPU controls the first single-pole double-throw switch (SPDT) 8 and the first audio signal output end AUX-R and the second audio signal output end AUX-L connected respectively by the second single-pole double-throw switch (SPDT) 9, first audio signal output end AUX-R and the external output audio signal of the second audio signal output end AUX-L, and respectively by the first single-pole double-throw switch (SPDT) 8 and the second single-pole double-throw switch (SPDT) 9 by audio signal transmission to USB connector, USB connector is by the external output audio signal of USB interface.When needing when there being electrical appliance to charge, the voltage signal that application delivery controller ADC detects, and by voltage signal by Internet Transmission to central controller device CPU, central controller CPU externally exports a high level signal by control signal output terminal SW, thus the input end of the input end of the first single-pole double-throw switch (SPDT) 8 and the second single-pole double-throw switch (SPDT) 9 is switched, first single-pole double-throw switch (SPDT) 8 and the second single-pole double-throw switch (SPDT) 9 are connected with the first usb signal end USB-DM and the second usb signal end USB-DP respectively, first usb signal end USB-DM and the external output current of the second usb signal end USB-DP, and respectively by the first single-pole double-throw switch (SPDT) 8 and the second single-pole double-throw switch (SPDT) 9 by current delivery to USB connector, USB connector is by the external output current of USB interface, for electrical appliance charges.
The utility model provides the onboard wireless data terminal of AUX interface and power supply interface, the power input access feeder ear VCC of USB connector 7, the first differential signal input DM and the second differential signal input DP two pins in the middle of USB connector 7 are connected with the output terminal of the first single-pole double-throw switch (SPDT) 8 and the second single-pole double-throw switch (SPDT) 9 respectively, first single-pole double-throw switch (SPDT) 8 is connected with audio signal output end and usb signal end respectively with two input ends of the second single-pole double-throw switch (SPDT) 9, central controller CPU is connected with delivery controller ADC network, by delivery controller ADC, central controller CPU judges that input is sound signal or current signal, and send control signal by central controller CPU to control signal output terminal SW, thus control the first single-pole double-throw switch (SPDT) 8 is be connected with audio signal output end or with usb signal end with the second single-pole double-throw switch (SPDT) 9, thus realize USB connector 7 supplying power for outside and the external dual-use function exporting AUX signal.When having multiple electrical appliance to need to charge, the multiple USB interface in USB connector 7 can be charged to each electrical appliance simultaneously.The utility model structure is simple, design ingenious, diverse in function, compared with prior art has obvious advantage.
Above-described embodiment is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection domain that the utility model claims determine.