CN204269125U - A kind of vehicle-mounted voice navigational system based on Bluetooth technology - Google Patents
A kind of vehicle-mounted voice navigational system based on Bluetooth technology Download PDFInfo
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- CN204269125U CN204269125U CN201420749518.0U CN201420749518U CN204269125U CN 204269125 U CN204269125 U CN 204269125U CN 201420749518 U CN201420749518 U CN 201420749518U CN 204269125 U CN204269125 U CN 204269125U
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Abstract
This is novel relates to a kind of vehicle-mounted voice navigational system based on Bluetooth technology, comprising: for being worn on user's bluetooth receiver with it and for being arranged on the navigation host in car; Bluetooth receiver comprises: CPU, the first bluetooth communication module be connected with this CPU; One microphone is connected by the input end of conditioning module with audio decoder module, and the output terminal of audio decoder module is connected with CPU; Navigation host comprises: processor module, the second bluetooth communication module be connected with this processor module, the dio Output Modules be connected with this processor module, the loudspeaker be connected with this dio Output Modules; Described conditioning module comprises: first, second channel unit, channel selection unit, the utility model improves the output signal transfer capability of audio decoder module to microphone by conditioning module, and then improve blue tooth voice signal quality, and then improve the speech recognition effect of navigation host, improve speech recognition degree.
Description
Technical field
The utility model relates to the communications field, particularly relates to a kind of vehicle-mounted voice navigational system based on Bluetooth technology.
Background technology
Traditional vehicle mounted guidance often adopts touch-screen to control, but when driving, by touching the notice controlling often to disperse driver, very likely causes traffic hazard; Therefore, the convenience that speech identifying function operates with raising can be added in vehicle mounted guidance.
But because traditional speech recognition performance is bad, cause this function to popularize.
Therefore, need to design the technical barrier that a kind of onboard navigation system that effectively can improve speech recognition capabilities is this area.
Utility model content
The purpose of this utility model is to provide a kind of vehicle-mounted voice navigational system based on Bluetooth technology, and native system improves blue tooth voice signal quality by adjusting module, and then the technical matters of the speech recognition degree of raising navigation host.
In order to solve the problems of the technologies described above, the utility model provides a kind of vehicle-mounted voice navigational system based on Bluetooth technology, comprising: for being worn on user's bluetooth receiver with it and for being arranged on the navigation host in car; Bluetooth receiver comprises: CPU, the first bluetooth communication module be connected with this CPU; One microphone is connected by the input end of conditioning module with audio decoder module, and the output terminal of audio decoder module is connected with CPU; Navigation host comprises: processor module, the second bluetooth communication module be connected with this processor module, the dio Output Modules be connected with this processor module, the loudspeaker be connected with this dio Output Modules; Described conditioning module comprises: first, second channel unit, channel selection unit, described channel selection unit comprises: comparer, the in-phase end of this comparer is as the input end of conditioning module, end of oppisite phase accesses a reference voltage, the output terminal of this comparer is connected with the base stage of NPN triode, PNP triode respectively, the described collector of NPN triode, the emitter of PNP triode are connected with power end respectively, and the emitter of described NPN triode, the collector of PNP triode are connected with the feeder ear of first passage unit, second channel unit respectively; The in-phase end of described comparer is also connected with the input end of first, second channel unit respectively, and first passage unit comprises: for carrying out the bleeder circuit of step-down to input signal, the output terminal of bleeder circuit is connected with the input end of the first voltage follower; Second channel unit comprises: the second voltage follower, and the output terminal of first, second voltage follower described is connected as the signal output part of conditioning module.
Described processor module is also connected with a LCD MODULE, and this LCD MODULE is suitable for showing described real-time road.
Described processor module is also connected with TF card card reading module with USB interface, SD card.
Technique scheme of the present utility model has the following advantages compared to existing technology: the utility model improves the output signal transfer capability of audio decoder module to microphone by conditioning module, and then improve blue tooth voice signal quality, and then improve the speech recognition effect of navigation host, improve speech recognition degree.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the vehicle-mounted voice navigational system based on Bluetooth technology of the present utility model;
Fig. 2 is the circuit diagram of conditioning module of the present utility model;
Fig. 3 is the circuit diagram of first, second channel unit of the present utility model;
Fig. 4 is the theory diagram of bluetooth receiver of the present utility model.
Wherein, comparer U1A, NPN triode T1, PNP triode T2, the first integrated operational amplifier U1A, the second integrated operational amplifier U1B, the 3rd integrated operational amplifier U1C.
Embodiment
As shown in Figure 1, a kind of vehicle-mounted voice navigational system based on Bluetooth technology, comprising: for being worn on user's bluetooth receiver with it and for being arranged on the navigation host in car; Bluetooth receiver comprises: CPU, the first bluetooth communication module be connected with this CPU; One microphone is connected by the input end of conditioning module with audio decoder module, and the output terminal of audio decoder module is connected with CPU; Navigation host comprises: processor module, the second bluetooth communication module be connected with this processor module, the dio Output Modules be connected with this processor module, the loudspeaker be connected with this dio Output Modules.Concrete, gathered the voice command of user by microphone, and carry out signal extraction through audio decoder module, realize command adapted thereto to realize processor module.Dio Output Modules is suitable for real-time broadcasting traffic information, to remind user's real-time road.
As shown in Figures 2 and 3, described conditioning module, comprising: first, second channel unit, channel selection unit; Described channel selection unit comprises: comparer U1A, the in-phase end of this comparer U1A is as the input end of conditioning module, end of oppisite phase accesses a reference voltage, the output terminal of this comparer is connected with the base stage of NPN triode T1, PNP triode T2 respectively, the described collector of NPN triode T1, the emitter of PNP triode T2 are connected with power end respectively, and the emitter of described NPN triode T1, the collector of PNP triode T2 are connected with the feeder ear of first passage unit, second channel unit respectively; The in-phase end of described comparer U1A is also connected with the input end of first, second channel unit respectively, and first passage unit comprises: for carrying out the bleeder circuit of step-down to input signal, the output terminal of bleeder circuit is connected with the input end of the first voltage follower; Second channel unit comprises: the second voltage follower, and the output terminal of first, second voltage follower described is connected as the signal output part of conditioning module.
Wherein, described bleeder circuit is in series by resistance R2 and resistance R3, one end access input signal ui of resistance R2, the other end of resistance R2 is connected with one end of resistance R3, and as the output terminal of described bleeder circuit, and resistance R2 or resistance R3 can adopt adjustable potentiometer (multiturn potentiometer) to regulate its output voltage.
Described comparer and first, second voltage follower adopt the first integrated operational amplifier U1A, the second integrated operational amplifier U1B, the 3rd integrated operational amplifier U1C respectively.
The principle of work of conditioning module of the present utility model is, compared by reference voltage and input voltage, such as reference voltage adopts 5V, namely, input voltage range is greater than 5V, then by first passage unit, voltage is reduced, adjust within 5V scope by bleeder circuit, access control system after the first voltage follower, if input voltage range is less than 5V, then directly carry out control system by the first voltage follower in second channel, therefore, the utility model all can be able to be nursed one's health the input signal being greater than or less than reference voltage, improve the versatility of conditioning module.Because the process of divider resistance to signal is linear, therefore, signal transacting can not distortion.
Optionally, described processor module is also connected with a LCD MODULE, and this LCD MODULE is suitable for showing described real-time road.
Described processor module is also connected with TF card card reading module with USB interface, SD card; Achieve data transmission by above-mentioned module, and map can be read by corresponding SD card and TF card.
Claims (3)
1. based on a vehicle-mounted voice navigational system for Bluetooth technology, it is characterized in that, comprising: for being worn on user's bluetooth receiver with it and for being arranged on the navigation host in car;
Bluetooth receiver comprises: CPU, the first bluetooth communication module be connected with this CPU; One microphone is connected by the input end of conditioning module with audio decoder module, and the output terminal of audio decoder module is connected with CPU;
Navigation host comprises: processor module, the second bluetooth communication module be connected with this processor module, the dio Output Modules be connected with this processor module, the loudspeaker be connected with this dio Output Modules;
Described conditioning module comprises: first, second channel unit, channel selection unit;
Described channel selection unit comprises: comparer, the in-phase end of this comparer is as the input end of conditioning module, end of oppisite phase accesses a reference voltage, the output terminal of this comparer is connected with the base stage of NPN triode, PNP triode respectively, the described collector of NPN triode, the emitter of PNP triode are connected with power end respectively, and the emitter of described NPN triode, the collector of PNP triode are connected with the feeder ear of first passage unit, second channel unit respectively;
The in-phase end of described comparer is also connected with the input end of first, second channel unit respectively,
First passage unit comprises: for carrying out the bleeder circuit of step-down to input signal, the output terminal of bleeder circuit is connected with the input end of the first voltage follower;
Second channel unit comprises: the second voltage follower,
The output terminal of first, second voltage follower described is connected as the signal output part of conditioning module.
2. the vehicle-mounted voice navigational system based on Bluetooth technology according to claim 1, it is characterized in that, described processor module is also connected with a LCD MODULE, and this LCD MODULE is suitable for showing described real-time road.
3. the vehicle-mounted voice navigational system based on Bluetooth technology according to claim 2, is characterized in that, described processor module is also connected with TF card card reading module with USB interface, SD card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420749518.0U CN204269125U (en) | 2014-12-03 | 2014-12-03 | A kind of vehicle-mounted voice navigational system based on Bluetooth technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420749518.0U CN204269125U (en) | 2014-12-03 | 2014-12-03 | A kind of vehicle-mounted voice navigational system based on Bluetooth technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204269125U true CN204269125U (en) | 2015-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420749518.0U Expired - Fee Related CN204269125U (en) | 2014-12-03 | 2014-12-03 | A kind of vehicle-mounted voice navigational system based on Bluetooth technology |
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| Country | Link |
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| CN (1) | CN204269125U (en) |
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2014
- 2014-12-03 CN CN201420749518.0U patent/CN204269125U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150415 Termination date: 20201203 |