CN114125615B - Vehicle-mounted interface data processing system and method and vehicle-mounted equipment - Google Patents
Vehicle-mounted interface data processing system and method and vehicle-mounted equipment Download PDFInfo
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- CN114125615B CN114125615B CN202210084334.6A CN202210084334A CN114125615B CN 114125615 B CN114125615 B CN 114125615B CN 202210084334 A CN202210084334 A CN 202210084334A CN 114125615 B CN114125615 B CN 114125615B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/004—Monitoring arrangements; Testing arrangements for microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/09—Applications of special connectors, e.g. USB, XLR, in loudspeakers, microphones or headphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
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Abstract
The utility model provides a vehicle-mounted interface data processing system, method and vehicle-mounted equipment, relate to vehicle-mounted equipment technical field and solved current vehicle-mounted interface design need prepare many sets of motorcycle type production data, the problem of later maintenance of being not convenient for, including vehicle-mounted microphone, be used for providing the microphone signal, vehicle-mounted special central processing module, be connected with vehicle-mounted microphone, vehicle-mounted special central processing module includes interface control unit and first interface transmission unit, interface control unit is used for according to the microphone signal, configure first interface transmission unit as first single-ended signal transmission unit or first difference signal transmission unit. This application can be according to the demand, configures first interface transmission unit into first single-ended signal transmission unit or first differential signal transmission unit to can be compatible difference mode and the interface circuit of single-ended mode simultaneously, be convenient for only design one set of motorcycle type production data, solve the later stage maintenance difficulty problem that exists at present.
Description
Technical Field
The application relates to the technical field of vehicle-mounted equipment, in particular to a vehicle-mounted interface data processing system and method and vehicle-mounted equipment.
Background
In the current car networking system, the car-mounted device generally includes a car-mounted data processing device (Telematics BOX, TBOX) and a car-mounted dedicated central processing unit (IVI), wherein the T-BOX can implement functions of remotely starting a car, turning on an air conditioner, adjusting a seat to a proper position, and communicating with other communication devices, and the IVI is a car-mounted integrated information processor formed based on a car body bus system and internet services, and as the number of electronic devices In the car increases, the number of various wire harnesses In the car increases, and the wire harness originally bundled with an active microphone wire harness increases the wire harnesses of various other electronic devices, and the situation of crosstalk among various wire harnesses and spatial radiation inevitably occurs.
Because the differential circuit can effectively reduce the common mode interference of voice signals in the transmission process and improve the anti-interference capability and the signal-to-noise ratio of voice, the current vehicle-mounted active microphone of certain vehicle types adopts a differential interface circuit, and the differential interface circuit adopts a differential connection method in the interface processing based on the original vehicle-mounted active microphone single-ended interface circuit.
However, the single-ended interface circuit can meet the requirements that the signal of the active microphone can be subjected to gain adjustment and frequency response adjustment and each wire harness at the interface has a diagnosis function, so that certain vehicle types can be compatible with the reserved single-ended interface circuit of the active microphone while designing a differential circuit.
However, due to the design, when an interface circuit adopted by the vehicle-mounted active microphone is produced, at least two sets of vehicle model production data (Bill of Material, BOM) need to be prepared, errors in BOM transmission can easily occur in the production process, once the BOM is in error, the device mounted on the vehicle needs to be replaced by a host or detached for maintenance, the time cost of maintenance is increased, and the later stage cannot be adjusted through software upgrading.
Disclosure of Invention
The application provides an interface circuit capable of being compatible with a differential mode and a single-ended mode simultaneously, which is convenient for only designing one set of BOM and solves the problem of difficult later maintenance of the interface circuit adopted by the current vehicle-mounted active microphone.
In one aspect, the present application provides a vehicle interface data processing system comprising
A vehicle mounted microphone for providing a microphone signal;
the vehicle-mounted special central processing module is connected with the vehicle-mounted microphone and comprises an interface control unit and a first interface transmission unit, wherein the interface control unit is used for configuring the first interface transmission unit into a first single-ended signal transmission unit or a first differential signal transmission unit according to the microphone signal.
In one possible implementation manner of the present application, the first interface transmission unit includes:
the switching part comprises a control signal end coupled with a control pin of the interface control unit, and the switching part is used for switching the on-off state according to the level signal change of the control signal end;
and the load part is coupled with the switch part, when the switch part is in a conducting state, the load part is in conducting coupling with a module loop of the vehicle-mounted data processing module, and when the switch part is in a cut-off state, the load part is in disconnecting coupling with the module loop of the vehicle-mounted data processing module.
In one possible implementation manner of the present application, the system includes a vehicle-mounted data processing module, the vehicle-mounted data processing module is in communication connection with the vehicle-mounted microphone and the vehicle-mounted dedicated central processing module, and the vehicle-mounted data processing module is used for implementing the remote communication function of the vehicle-mounted interface data processing system.
In one possible implementation manner of the present application, the vehicle-mounted data processing module includes:
the second interface transmission unit is in communication connection with the vehicle-mounted microphone and is used for transmitting the microphone signal in a differential transmission mode or a single-ended transmission mode;
and the bypass unit is in communication connection with the second interface transmission unit and the vehicle-mounted special central processing module, and is used for switching the on-off state of the vehicle-mounted data processing module and the vehicle-mounted special central processing module.
In one possible implementation manner of the present application, the second interface transmission unit includes a second single-ended signal transmission unit or a second differential signal transmission unit.
In a possible implementation manner of the present application, the vehicle-mounted dedicated central processing module further includes an interface diagnosis unit in communication connection with the first interface transmission unit.
In a possible implementation manner of the present application, the vehicle-mounted dedicated central processing module further includes a gain and frequency response adjusting unit in communication connection with the first interface transmission unit.
On the other hand, the present application provides a vehicle-mounted interface data processing method, which is applied to a vehicle-mounted interface data processing system, where the vehicle-mounted interface data processing system includes a vehicle-mounted microphone and a vehicle-mounted dedicated central processing module, and the vehicle-mounted dedicated central processing module includes a first interface transmission unit, and the method includes:
acquiring a microphone signal provided by the vehicle-mounted microphone;
the first interface transmission unit is configured as a first single-ended signal transmission unit or a first differential signal transmission unit according to the microphone signal.
In one possible implementation manner of the present application, when the system includes an on-board data processing module, the on-board data processing module includes a second interface transmission unit and a bypass unit, the method includes:
configuring a second interface transmission unit as a second single-ended signal transmission unit or a second differential signal transmission unit according to the microphone signal;
when a second interface transmission unit is configured as the second single-ended signal transmission unit, configuring the first interface transmission unit as a first single-ended signal transmission unit;
when the second interface transmission unit is configured as the second differential signal transmission unit, the first interface transmission unit is configured as a first differential signal transmission unit.
On the other hand, the application also provides vehicle-mounted equipment, and the vehicle-mounted equipment adopts the vehicle-mounted interface data processing method.
The system comprises a vehicle-mounted microphone and a vehicle-mounted special central processing module, wherein the vehicle-mounted special central processing module comprises an interface control unit and a first interface transmission unit, when the microphone signal input by the vehicle-mounted microphone is a single-ended signal, the first interface transmission unit is configured to be a first single-ended signal transmission unit for transmitting the microphone signal in a single-ended form through the interface control unit, when the microphone signal input by the vehicle-mounted microphone is a differential signal, configuring the first interface transmission unit as a first differential signal transmission unit for transmitting the microphone signal in a differential form through the interface control unit, the vehicle-mounted interface data processing system provided by the application realizes the simultaneous compatibility of a differential mode and a single-ended mode, is convenient to design only one set of BOM, and solves the problem of difficult later maintenance of an interface circuit adopted by the current vehicle-mounted active microphone.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a vehicle interface data processing system in an embodiment of the present application;
fig. 2 is a schematic flowchart of an embodiment of a vehicle interface data processing method in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the invention. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and processes are not set forth in detail in order to avoid obscuring the description of the present invention with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
The embodiment of the application provides a vehicle-mounted interface data processing system, a vehicle-mounted interface data processing method and vehicle-mounted equipment, which are respectively described in detail below.
As shown in fig. 1, which is a schematic structural diagram of an embodiment of a vehicle interface data processing system in an embodiment of the present application, the vehicle interface data processing system includes:
a vehicle microphone 100 for providing a microphone signal. In the present embodiment, the vehicle-mounted microphone 100 is a vehicle-mounted active microphone, and the interior of the vehicle-mounted active microphone is composed of a microphone and an amplifying circuit.
The vehicle-mounted dedicated central processing module 200 is connected to the vehicle-mounted microphone 100, the vehicle-mounted dedicated central processing module 200 includes an interface control unit 201 and a first interface transmission unit 202, and the interface control unit 201 is configured to configure the first interface transmission unit 202 as a first single-ended signal transmission unit or a first differential signal transmission unit according to a microphone signal.
In the present embodiment, the vehicle-mounted dedicated central processing module 200 is an IVI controller, wherein the IVI controller includes one or more interface control units 201 of a processing core, one or more memories of a computer readable storage medium, a power supply, an input unit, a data interface, and the like. Those skilled in the art will appreciate that the configuration of the IVI controller shown in fig. 1 does not constitute a limitation of the IVI controller and may include more or fewer components than shown, or some components in combination, or a different arrangement of components. Wherein:
the interface control unit 201 is a control center of the IVI controller, connects various parts of the entire IVI controller by using various interfaces and lines, and performs various functions of the IVI controller and processes data by running or executing software programs and/or modules stored in the memory and calling data stored in the memory, thereby performing overall monitoring of the IVI controller. Optionally, the interface control unit 201 may include one or more processing cores; the interface control Unit 201 may be a Micro Control Unit (MCU), a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, etc. The general purpose interface control unit 201 may be a microprocessor or the processor may be any conventional processor or the like, preferably the interface control unit 201 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs and the like, and a modem processor, which mainly handles wireless communications. It is to be understood that the modem processor described above may not be integrated into the interface control unit 201.
The memory may be used to store software programs and modules, and the interface control unit 201 executes various functional applications and data processing by operating the software programs and modules stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data created according to use of the IVI controller, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory may further include a memory controller to provide the interface control unit 201 with access to the memory.
The IVI controller further includes a power supply for supplying power to each component, and preferably, the power supply may be logically connected to the interface control unit 201 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system. The power supply may also include any component of one or more dc or ac power sources, recharging systems, power failure detection circuitry, power converters or inverters, power status indicators, and the like.
The IVI controller may also include an input unit, which may be a key, for receiving input numeric or character information, and generating keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.
The IVI controller also comprises a data interface, wherein the data interface comprises an uplink data interface and a downlink data interface, the IVI controller has a downlink data wireless transmission function, the downlink data wireless transmission function is the same as a wireless protocol (WiFi/BLE/zigbee/433) used by the monitoring terminal, the IVI controller also has an uplink data transmission function, and the uplink data interface can be an Ethernet wired interface and also can have a wireless protocol function of.11 ac/b/g/n.
The present application includes an in-vehicle microphone 100 and an in-vehicle dedicated central processing module 200, the in-vehicle dedicated central processing module 200 includes an interface control unit 201 and a first interface transmission unit 202, when the microphone signal input by the in-vehicle microphone 100 is a single-ended signal, the first interface transmission unit 202 is configured as a first single-ended signal transmission unit for transmitting a microphone signal in a single-ended form by the interface control unit 201, when the microphone signal input by the in-vehicle microphone 100 is a differential signal, the first interface transmission unit 202 is configured as a first differential signal transmission unit for transmitting a microphone signal in a differential form by the interface control unit 201, the vehicle-mounted interface data processing system provided by the application realizes the simultaneous compatibility of a differential mode and a single-ended mode, is convenient to design only one set of BOM, and solves the problem of difficult later maintenance of an interface circuit adopted by the current vehicle-mounted active microphone.
In another embodiment of the present application, the first interface transmission unit 202 includes a switch portion and a load portion, specifically:
and the switching part comprises a control signal end coupled with a control pin of the interface control unit 201, and is used for switching the on-off state according to the level signal change of the control signal end.
Specifically, as shown in fig. 1, the switch portion includes a first switch tube Q1, a second switch tube Q2, a third switch tube Q3 and a fourth switch tube Q4, in this embodiment, the first to fourth switch tubes (Q1 to Q4) may employ triodes, MOS transistors, thyristors or other devices capable of implementing the switching function, in this embodiment, the first to fourth switch tubes (Q1 to Q4) employ NPN-type triodes, the control signal terminals are bases of the first to fourth switch tubes (Q1 to Q4), the control pins of the interface control unit 201 include GPIO pins 1 to GPIO4, the first to fourth switch tubes (Q1 to Q4) are coupled to GPIO pins 1 to Q389 in a manner that the base of the first switch tube Q2 is coupled to the pin 1, the base of the first switch tube Q53 is coupled to the first pin 2, and the base of the first switch tube Q2 is coupled to the switch tube Q8686867, the base of the first switch Q4 is coupled to pin GPIO 4. In the application process, the on-off states of the first to fourth switching tubes (Q1 to Q4) are controlled through high and low levels output by the pins GPIO1 to GPIO4 of the interface control unit 201.
And a load part coupled to the switch part, the load part being coupled to the module circuit of the in-vehicle data processing module 300 in a conductive state when the switch part is in a conductive state, and the load part being decoupled from the module circuit of the in-vehicle data processing module 300 when the switch part is in a cut-off state.
In the present embodiment, the load section includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, and a resistor R6, in which:
one end of the resistor R3 is coupled to the collector of the first switch transistor Q1, the other end of the resistor R3 is coupled to the power supply VCC, and the emitter of the first switch transistor Q1 is coupled to the first signal input terminal of the vehicle-mounted dedicated central processing module 200;
one end of the resistor R1 is coupled to the collector of the first switch transistor Q2, the other end of the resistor R1 is coupled to the power supply VCC, and the emitter of the first switch transistor Q2 is coupled to the first signal input terminal of the vehicle-mounted dedicated central processing module 200;
one end of the resistor R4 and one end of the resistor R2 are coupled to the collector of the first switch transistor Q3, the other end of the resistor R4 and the other end of the resistor R2 are coupled to the second signal input end of the vehicle-mounted dedicated central processing module 200, and the emitter of the first switch transistor Q2 is coupled to ground;
one end of the resistor R6 is coupled to the collector of the first switch Q4, the other end of the resistor R6 is coupled to the second signal input end of the vehicle-mounted dedicated central processing module 200, and the emitter of the first switch Q4 is coupled to ground.
In this embodiment, the resistor R1, the resistor R3, the resistor R4, and the resistor R2 may all adopt a resistor device with a resistance of 680 ohms, the resistor R6 adopts a resistor device with a resistance of 0 ohms, or the resistors R1, R3, R4, and R2 all adopt a resistor device with a resistance of 330 ohms, and the resistor R6 adopts a resistor device with a resistance of 0 ohms, in this embodiment, when the on-off states of the first to fourth switching tubes (Q1 to Q4) are controlled by only meeting the high and low levels output at the pins GPIO1 to GPIO4 of the control interface control unit 201, different combinations of the resistor R1, the resistor R3, the resistor R4, the resistor R2, and the resistor R6 may form a single-ended signal transmission circuit or a differential signal transmission circuit of a microphone signal, and therefore, the resistances of the resistors R1, R3, the resistor R4, the resistor R2, and the resistor R6 are not more specifically limited.
In the application process of the vehicle-mounted interface data processing system, a hardware interface carrying the vehicle-mounted interface data processing system is required to have diagnosis functions such as short circuit and open circuit.
Therefore, in another embodiment of the present application, the vehicle-mounted dedicated central processing module 200 further includes an interface diagnosis unit 203 communicatively connected to the first interface transmission unit 202.
The interface diagnosis unit 203 includes two analog to digital converter (ADC) diagnosis pins of the interface control unit 201, namely a pin AD1 and a pin AD2, and the pin AD1 and the pin AD2 are input pins. In the present embodiment, the two interface states of the in-vehicle microphone 100 are diagnosed by the pin AD1 and the pin AD2 of the interface control unit 201.
When the interface diagnosis unit 203 is applied specifically, when the vehicle-mounted interface data processing system is normally connected to the vehicle-mounted microphone 100, the input voice differential signal enters the pin AD1 and the pin AD2 of the interface control unit 201 for calculation, the interface state of the vehicle-mounted microphone 100 is judged according to the combination of the AD values calculated in the interface control unit 201, and the interface control unit 201 can prompt the user of the current interface state of the vehicle-mounted microphone 100 according to different AD values, namely, the open circuit state or the short circuit state, so as to achieve the diagnosis function.
In this embodiment, the diagnostic voltages of the pin AD1 and the pin AD2 may be a voltage range X1 and a voltage range X2, the interface control unit 201 may diagnose the interface state of the vehicle microphone 100 according to different voltage range values detected by the pin AD1 and the pin AD2, the voltage range X1 and the voltage range X2 may be set according to actual needs, which is not specifically limited herein, and the reference of the diagnostic voltages of the pin AD1 and the pin AD2 may refer to table 1.
TABLE 1 diagnostic Voltage reference tables for pins AD1 and AD2
In the application process of the vehicle-mounted interface data Processing system, no matter the microphone Signal is a single-ended Signal or a differential Signal, gain adjustment and frequency response adjustment are needed to realize gain adjustment and frequency response control on the microphone Signal, and then the processed voice Signal in the microphone Signal is input into a Digital Signal Processing (DSP) for further Processing.
In another embodiment of the present application, the vehicle-mounted dedicated central processing module 200 further comprises a gain and frequency response adjusting unit 204 communicatively connected to the first interface transmission unit 202.
The gain and frequency response adjusting unit 204 includes an operational amplifier and a filtering part, the operational amplifier includes an amplifier, the filtering part includes a filter, the operational amplifier and the filtering part adjust the gain and frequency response of the microphone signal input by the vehicle-mounted microphone 100, in this embodiment, the parameter settings of the operational amplifier and the filtering part are not specifically limited, usually, according to the processing capability of the input end of the rear-end digital signal processor, how much gain needs to be adjusted for the microphone signal is determined, generally, the maximum amplitude of the analog voltage at the input end of the digital signal processor is required not to exceed the analog supply voltage of the digital signal processor, and it is only required that the analog voltage of the microphone signal does not exceed the maximum amplitude of the analog supply voltage of the digital signal processor.
In some vehicle models, besides the IVI controller, the vehicle-mounted interface data processing system can also be provided with a T-box communication box to realize remote communication, and the T-box can also play a role in temporarily transmitting microphone signals under the condition that the IVI controller is powered off or is damaged by short circuit.
Therefore, in another embodiment of the present application, the system includes a vehicle-mounted data processing module 300, the vehicle-mounted data processing module 300 is connected with the vehicle-mounted microphone 100 and the vehicle-mounted dedicated central processing module 200 in a communication manner, and the vehicle-mounted data processing module 300 is used for realizing the remote communication function of the vehicle-mounted interface data processing system.
The vehicle-mounted data processing module 300 is a T-box, and the T-box can be in communication connection with the IVI controller through electronic circuits, WiFi communication, Bluetooth communication and the like.
In order to satisfy the effect that the vehicle-mounted data processing module 300 can temporarily transmit the microphone signal under the condition that the vehicle-mounted special central processing module 200 is powered off or damaged due to short circuit, an interface transmission unit for transmitting the microphone signal can be also arranged in the vehicle-mounted data processing module 300, and the vehicle-mounted special central processing module 200 and the vehicle-mounted data processing module 300 can be mutually matched for use through parameters of the interface transmission unit for transmitting the microphone signal arranged in the vehicle-mounted special central processing module 200 and the vehicle-mounted data processing module 300 so as to meet different use requirements.
Thus, the on-board data processing module 300 includes:
the second interface transmission unit 301 is in communication connection with the vehicle-mounted microphone 100, and the second interface transmission unit 301 includes a second single-ended signal transmission unit or a second differential signal transmission unit, and is configured to transmit a microphone signal in a differential transmission mode or a single-ended transmission mode.
Specifically, the second interface transmission unit 301 includes a resistor R21, a resistor R22, a capacitor C21, and a capacitor C22, wherein one end of the resistor R21 is coupled to the first signal output terminal of the vehicle microphone 100, one end of the resistor R21 is coupled to the power VCC, one end of the resistor R22 is coupled to the second signal output terminal of the vehicle microphone 100, one end of the resistor R21 is grounded, one end of the capacitor C21 is coupled to the first signal output terminal of the vehicle microphone 100, the other end of the capacitor C21 is coupled to the decoder, one end of the capacitor C22 is coupled to the second signal output terminal of the vehicle microphone 100, and the other end of the capacitor C22 is coupled to the decoder.
The resistor R21 may be a 680-ohm or 330-ohm resistor, the resistor R22 may be a 0-ohm or 330-ohm resistor, in order to meet the requirement that the vehicle-mounted dedicated central processing module 200 and the vehicle-mounted data processing module 300 can be used in cooperation with each other, in an early stage of design of the vehicle-mounted interface data processing system, the resistances of the resistor R21 and the resistor R22 are preset according to a form of a microphone signal input by the vehicle-mounted microphone 100, and the output levels of the control pins of the interface control unit 201 including the pins GPIO1 to GPIO4 are set, a specific setting mode may refer to table 2.
TABLE 2 reference table of the control pin truth of the interface control unit 201 and the resistance of the second interface transmission unit 301
H: high level
L: low level of electricity
X: at an arbitrary level.
In this embodiment, by adopting the above manner, the early-stage debugging test can be very convenient, the debugging can be performed without depending on software, the "H" and the "L" output by the GPIO of the interface control unit 201 can be realized without depending on software, and the hardware is directly connected to the power supply and the ground to realize the "H" and "L" functions, so that the hardware design is simpler and more convenient.
In order to realize the data transmission between the vehicle-mounted dedicated central processing module 200 and the vehicle-mounted data processing module 300, the vehicle-mounted data processing module 300 further includes:
the bypass unit 302, the bypass unit 302 is in communication connection with the second interface transmission unit 301 and the vehicle-mounted dedicated central processing module 200, and the bypass unit 302 is used for switching the on-off state of the vehicle-mounted data processing module 300 and the vehicle-mounted dedicated central processing module 200.
In this embodiment, the bypass unit 302 may be a relay switch functioning to switch the communication branch, a signal terminal of one side of the bypass unit 302 is coupled to two input terminals of the vehicle-mounted microphone 100, and a signal terminal of the other side of the bypass unit 302 is coupled to an input terminal of the vehicle-mounted dedicated central processing module 200. In the application process, after the microphone signal is input to the vehicle-mounted data processing module 300, the microphone signal is transmitted to the vehicle-mounted special central processing module 200 through the bypass unit 302, or after the microphone signal is input to the vehicle-mounted data processing module 300, the microphone signal is transmitted to the vehicle-mounted special central processing module 200 through the bypass unit 302, so that the transmission of the microphone signal between the vehicle-mounted data processing module 300 and the vehicle-mounted special central processing module 200 is facilitated, and the circuit design is simpler.
In order to better implement the vehicle-mounted interface data processing system in the embodiment of the present application, on the basis of the vehicle-mounted interface data processing system, the embodiment of the present application further provides a vehicle-mounted interface data processing method, where the vehicle-mounted interface data processing method is applied to the vehicle-mounted interface data processing system, the vehicle-mounted interface data processing system includes a vehicle-mounted microphone 100 and a vehicle-mounted dedicated central processing module 200, the vehicle-mounted dedicated central processing module 200 includes a first interface transmission unit 202, as shown in fig. 2, and the vehicle-mounted interface data processing method includes:
401. acquiring a microphone signal provided by the in-vehicle microphone 100;
402. the first interface transmission unit 202 is configured as a first single-ended signal transmission unit or a first differential signal transmission unit according to a microphone signal.
In another embodiment of the present application, when the system includes the on-board data processing module 300, the on-board data processing module 300 includes the second interface transmission unit 301 and the bypass unit 302, the method includes:
configuring the second interface transmission unit 301 as a second single-ended signal transmission unit or a second differential signal transmission unit according to the microphone signal;
when the second interface transmission unit 301 is configured as a second single-ended signal transmission unit, the first interface transmission unit 202 is configured as a first single-ended signal transmission unit;
when the second interface transmission unit 301 is configured as the second differential signal transmission unit, the first interface transmission unit 202 is configured as the first differential signal transmission unit.
In another embodiment of the present application, the present application further provides an on-board device, where the on-board device employs the on-board interface data processing method.
The foregoing describes in detail a vehicle-mounted interface data processing system, a method and a vehicle-mounted device provided in the embodiments of the present application, and a specific example is applied in the present application to explain the principle and the implementation of the present invention, and the description of the foregoing embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (6)
1. An in-vehicle interface data processing system, comprising:
a vehicle mounted microphone for providing a microphone signal;
the vehicle-mounted special central processing module is connected with the vehicle-mounted microphone and comprises an interface control unit and a first interface transmission unit, wherein the interface control unit is used for configuring the first interface transmission unit into a first single-ended signal transmission unit or a first differential signal transmission unit according to the microphone signal;
the first interface transmission unit includes:
the switch part comprises a control signal end coupled with a control pin of the interface control unit and is used for switching the on-off state according to the level signal change of the control signal end;
the switch part comprises a first switch tube Q1, a second switch tube Q2, a third switch tube Q3 and a fourth switch tube Q4, a control signal end is a base electrode of the first switch tube to the fourth switch tube (Q1 to Q4), a control pin of the interface control unit comprises pins GPIO1 to GPIO4, and the base electrodes of the first switch tube to the fourth switch tube (Q1 to Q4) are respectively coupled with the pins GPIO1 to GPIO 4;
the load part is coupled with the switch part, when the switch part is in a conducting state, the load part is in conducting coupling with a module loop of the vehicle-mounted data processing module, and when the switch part is in a cut-off state, the load part is out of coupling with the module loop of the vehicle-mounted data processing module;
the load part comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a resistor R6, wherein:
one end of the resistor R3 is coupled to the collector of the first switch transistor Q1, the other end of the resistor R3 is coupled to the power supply VCC, and the emitter of the first switch transistor Q1 is coupled to the first signal input terminal of the vehicle-mounted dedicated central processing module;
one end of the resistor R1 is coupled to the collector of the first switch transistor Q2, the other end of the resistor R1 is coupled to the power supply VCC, and the emitter of the first switch transistor Q2 is coupled to the first signal input terminal of the vehicle-mounted dedicated central processing module;
one end of the resistor R4 and one end of the resistor R2 are coupled with the collector of the first switch tube Q3, the other end of the resistor R4 and the other end of the resistor R2 are coupled with the second signal input end of the vehicle-mounted special central processing module, and the emitter of the first switch tube Q2 is coupled with the ground; one end of the resistor R6 is coupled with the collector of the first switch tube Q4, the other end of the resistor R6 is coupled with the second signal input end of the vehicle-mounted special central processing module, and the emitter of the first switch tube Q4 is coupled with the ground;
the resistor R1, the resistor R3, the resistor R4 and the resistor R2 can all adopt resistor devices with the resistance value of 680 ohms, the resistor R6 adopts resistor devices with the resistance value of 0 ohm, or the resistor R1, the resistor R3, the resistor R4 and the resistor R2 all adopt resistor devices with the resistance value of 330 ohms, and the resistor R6 adopts resistor devices with the resistance value of 0 ohm;
the system comprises a vehicle-mounted data processing module, the vehicle-mounted data processing module is in communication connection with the vehicle-mounted microphone and the vehicle-mounted special central processing module, and the vehicle-mounted data processing module is used for realizing the remote communication function of the vehicle-mounted interface data processing system;
the vehicle-mounted data processing module comprises:
the second interface transmission unit is in communication connection with the vehicle-mounted microphone and is used for transmitting the microphone signal in a differential transmission mode or a single-ended transmission mode, and the second interface transmission unit comprises a second single-ended signal transmission unit or a second differential signal transmission unit;
the second interface transmission unit comprises a resistor R21, a resistor R22, a capacitor C21 and a capacitor C22, wherein one end of the resistor R21 is coupled with a first signal output end of the vehicle-mounted microphone, one end of the resistor R21 is coupled with a power supply VCC, one end of the resistor R22 is coupled with a second signal output end of the vehicle-mounted microphone, one end of the resistor R21 is grounded, one end of the capacitor C21 is coupled with a first signal output end of the vehicle-mounted microphone, the other end of the capacitor C21 is coupled with a decoder, one end of the capacitor C22 is coupled with a second signal output end of the vehicle-mounted microphone, and the other end of the capacitor C22 is coupled with the decoder;
the resistor R21 may be a 680 ohm or 330 ohm resistor device, and the resistor R22 may be a 0 ohm or 330 ohm resistor device;
when the system comprises the vehicle-mounted data processing module, the second interface transmission unit is configured to be a second single-ended signal transmission unit or a second differential signal transmission unit according to the microphone signal;
when the second interface transmission unit is configured as a second single-ended signal transmission unit, configuring the first interface transmission unit as a first single-ended signal transmission unit;
when the second interface transmission unit is configured as the second differential signal transmission unit, the first interface transmission unit is configured as the first differential signal transmission unit.
2. The vehicle interface data processing system of claim 1, wherein the vehicle data processing module comprises:
and the bypass unit is in communication connection with the second interface transmission unit and the vehicle-mounted special central processing module, and is used for switching the on-off state of the vehicle-mounted data processing module and the vehicle-mounted special central processing module.
3. The vehicle interface data processing system of claim 1, wherein the vehicle specific central processing module further comprises an interface diagnostic unit communicatively coupled to the first interface transmission unit.
4. The vehicle interface data processing system of claim 1, wherein said vehicle specific central processing module further comprises a gain and frequency response adjustment unit communicatively coupled to said first interface transmission unit.
5. A vehicle interface data processing method applied to the vehicle interface data processing system according to claim 1, the method comprising:
acquiring a microphone signal provided by the vehicle-mounted microphone;
configuring the first interface transmission unit as a first single-ended signal transmission unit or a first differential signal transmission unit according to the microphone signal;
when the system comprises an on-board data processing module, the on-board data processing module comprises a second interface transmission unit, and the method comprises the following steps:
configuring a second interface transmission unit as a second single-ended signal transmission unit or a second differential signal transmission unit according to the microphone signal;
when a second interface transmission unit is configured as the second single-ended signal transmission unit, configuring the first interface transmission unit as a first single-ended signal transmission unit;
when the second interface transmission unit is configured as the second differential signal transmission unit, the first interface transmission unit is configured as a first differential signal transmission unit.
6. An in-vehicle apparatus characterized in that the in-vehicle apparatus employs the in-vehicle interface data processing method according to claim 5.
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| CN114125615A (en) | 2022-03-01 |
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