CN115550101A - Automobile audio bus test system - Google Patents
Automobile audio bus test system Download PDFInfo
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- CN115550101A CN115550101A CN202211142593.6A CN202211142593A CN115550101A CN 115550101 A CN115550101 A CN 115550101A CN 202211142593 A CN202211142593 A CN 202211142593A CN 115550101 A CN115550101 A CN 115550101A
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- 238000004088 simulation Methods 0.000 claims abstract description 47
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
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Abstract
The embodiment of the invention discloses an automobile audio bus test system, which comprises: the bus test device comprises a data transceiver and a bus test device, wherein the data transceiver comprises a first data communication module and a first bus communication module; the data simulation module is used for sending the simulated audio data to the second data communication module; the second data communication module is used for sending the received analog audio data to the first data communication module; the first data communication module is used for sending the received analog audio data to the first bus communication module; and the first bus communication module is used for sending the received analog audio data to the automobile audio bus, receiving communication feedback information sent by the automobile audio node, and testing the data sending function of the automobile audio bus based on the communication feedback information. The automobile audio bus can be automatically tested.
Description
Technical Field
The embodiment of the invention relates to the technical field of automobile testing, in particular to an automobile audio bus testing system.
Background
An automobile Audio Bus (A2B) is a vehicle-mounted high-bandwidth (50 Mbps), bidirectional and digital Audio Bus, adopts a daisy chain structure, is a single-Master (Master) and multi-Slave (Slave) system, and maximally supports 11 nodes (10 Slave nodes), the distance between the nodes is 15 meters at most, and the length of the whole daisy chain is 40 meters at most.
Currently, A2B bus is usually tested manually by using a plurality of nodes on the A2B bus.
However, the time cost and the labor cost of the currently implemented automobile audio bus test mode are high, the test mode needs to depend on a plurality of nodes on an A2B bus, and the accuracy of a test result is difficult to ensure.
Disclosure of Invention
The embodiment of the invention provides a test system for an automobile audio bus, which not only can automatically test the automobile audio bus, but also can reduce the dependency on nodes on an A2B bus.
In a first aspect, an embodiment of the present invention provides an automobile audio bus test system, including:
the test device comprises a data simulation module and a second data communication module in communication connection with the first data communication module; wherein the content of the first and second substances,
the data simulation module is used for simulating the simulated audio data which can be transmitted in the automobile audio bus and sending the simulated audio data to the second data communication module;
the second data communication module is used for receiving the analog audio data sent by the data analog module and sending the analog audio data to the first data communication module;
the first data communication module is used for receiving the analog audio data sent by the second data communication module and sending the analog audio data to the first bus communication module;
the first bus communication module is used for receiving the analog audio data sent by the first data communication module, sending the analog audio data to the automobile audio bus, receiving communication feedback information sent by an automobile audio node in communication connection with the automobile audio bus aiming at the analog audio data, and testing the data sending function of the automobile audio bus based on the communication feedback information.
The embodiment of the invention provides an automobile audio bus test system, which comprises: the test device comprises a data simulation module and a second data communication module in communication connection with the first data communication module; the system provided by the embodiment of the invention can simulate the simulated audio data which can be transmitted in the automobile audio bus through the data simulation module so as to generate the audio data without depending on a node, and send the simulated audio data to the second data communication module; the second data communication module receives the analog audio data sent by the data analog module and sends the analog audio data to the first data communication module so as to realize interaction between the data transceiver and the bus test device; the first data communication module receives the analog audio data sent by the second data communication module and sends the analog audio data to the first bus communication module; the first bus communication module is used for receiving the analog audio data sent by the first data communication module, sending the analog audio data to the automobile audio bus, receiving communication feedback information sent by an automobile audio node in communication connection with the automobile audio bus aiming at the analog audio data, and testing the data sending function of the automobile audio bus based on the communication feedback information. The system not only can automatically test the automobile audio bus, but also can reduce the dependency on nodes on the A2B bus.
Drawings
Fig. 1 is a schematic structural diagram of an automotive audio bus test system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an automotive audio bus test system according to a second embodiment of the present invention;
fig. 3 is a schematic diagram of an alternative example of an automobile audio bus test system according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of another alternative example in an automobile audio bus test system according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described through embodiments with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 following embodiments, optional features and examples are provided in each embodiment, and various features described in the embodiments may be combined to form a plurality of alternatives, and each numbered embodiment should not be regarded as only one technical solution.
Example one
Fig. 1 is a schematic structural diagram of an automobile audio bus test system according to an embodiment of the present invention. The embodiment can be suitable for testing the automobile audio bus, and is particularly suitable for testing the data sending function of the automobile audio bus.
Referring to fig. 1, the system for testing an audio bus of an automobile according to this embodiment may include: the test device comprises a data transceiver 110 and a bus test device 120, wherein the data transceiver comprises a first data communication module 1110 and a first bus communication module 1120 which is in communication connection with the automobile audio bus to be tested, and the test device comprises a data simulation module 1210 and a second data communication module 1220 which is in communication connection with the first data communication module. Wherein the content of the first and second substances,
and the data simulation module 1210 is used for simulating the simulated audio data which can be transmitted in the automobile audio bus and sending the simulated audio data to the second data communication module.
It is understood that the data transceiving means 110 is a means for communicating with the car audio bus and bus test means 120 and processing data communicated by the car audio bus and bus test means 120; the data transceiver 110 may be directly connected to the car audio Bus for communication, for example, the data transceiver may communicate with the Bus test device 120 through ethernet, wireless network, or Universal Serial Bus (USB), and the communication method is not limited in particular. The bus test device 120 is a device for communicating with the data transceiver 110 and testing the car audio bus according to a feedback result related to the received or transmitted data.
The data simulation module 1210 may be a module for simulating analog audio data for testing a data transmission function of an automobile audio bus; the way in which the data simulation module 1210 simulates the simulated audio data may be simulated by audio simulation software integrated in the data simulation module 1210, and the way in which the simulated audio data is simulated is not particularly limited; one end of the data simulation module 1210 may be connected to the second data communication module 1220. From the source, the analog audio data can be understood as data which is simulated by the data simulation module 1210 and used for testing the data sending function of the automobile audio bus and can be transmitted in the automobile audio bus, and can also be audio data which can be transmitted in the automobile audio bus and is converted from the data type of other types of audio data which are sent to the data simulation module through a USB, an ethernet or a wireless network; in terms of content type, the analog audio data may be voice type data, music type data, or alert tone type data, and the content type of the analog audio data is not particularly limited; in terms of channels, the analog audio data may be monaural audio data or may be multichannel audio data.
In practical applications, the data simulation module 1210 can simulate the simulated audio data that can be transmitted in the car audio bus, and send the simulated audio data to the second data communication module 1220; the second data communication module 1220 can be understood as a module communicating with the data simulation module 1210 and the first data communication module 1110; one end of the second data communication module 1220 may be connected to communicate with the data simulation module 1210, and the other end may be connected to communicate with the first data communication module 1110.
The second data communication module 1220 is configured to receive the analog audio data sent by the data analog module, and send the analog audio data to the first data communication module.
It should be noted that the analog audio data sent by the data analog module 1210 needs to be sent to the data transceiver 110, so that the data transceiver 110 processes the analog audio data and sends the processed analog audio data to the car audio bus. Therefore, in the embodiment of the present invention, the bus test device 120 may send the received analog audio data sent by the data simulation module 1210 to the first data communication module 1110 of the data transceiver 110 for communicating with the bus test device 120 through the second data communication module 1220.
The first data communication module 1110 is configured to receive analog audio data sent by the second data communication module, and send the analog audio data to the first bus communication module.
One end of the first data communication module 1110 is connected to the first bus communication module 1120, and is configured to communicate with the first bus communication module 1120; the communication with the second data communication module 1220 of the bus test device 120 can also be performed through ethernet, wireless network, USB, or the like.
It will be appreciated that in embodiments of the invention. The data transmission function of the car audio bus can be tested only by sending the analog audio data sent by the second data communication module 1220 to the car audio bus. Accordingly, the first data communication module 1110 may transmit the analog audio data to the first bus communication module 1120, which may communicate with the car audio bus.
The first bus communication module 1120 is configured to receive the analog audio data sent by the first data communication module, send the analog audio data to the car audio bus, receive communication feedback information sent by a car audio node in communication with the car audio bus for the analog audio data, and test a data sending function of the car audio bus based on the communication feedback information.
The first bus communication module 1120 can be used for communicating with the first data communication module 1110 and the car audio bus. The car audio node can be understood as a node of a car audio bus communication connection. The communication feedback information can be understood as that after the automobile audio node receives the analog audio data through the automobile audio bus, based on the information fed back by the automobile audio bus related protocol, whether the analog audio data is successfully sent or not can be known through the communication feedback information, if the data is successfully sent, the automobile audio bus is in a normal state, otherwise, the automobile audio bus is in an abnormal state.
In the embodiment of the present invention, the first bus communication module 1120 may receive the analog audio data sent by the first data communication module 1110, and send the analog audio data to the car audio bus, after the car audio node communicatively connected to the car audio bus receives the analog audio data through the car audio bus, the car audio node may feed back communication feedback information to the first bus communication module 1120 based on a protocol related to the car audio bus, and the first bus communication module 1120 receives the communication feedback information sent by the car audio node communicatively connected to the car audio bus for the analog audio data, so as to test a data sending function of the car audio bus based on the communication feedback information. Optionally, the car audio node and the first bus communication module 1120 may communicate with each other through a Controller Area Network (CAN) bus, and the way in which the car audio node sends the communication feedback information to the first bus communication module 1120 may be to perform feedback through the CAN bus.
Optionally, the car audio node includes a master node in each node communicatively connected to the car audio bus.
It should be noted that the car audio bus is a single master, multi-slave system, so the car audio bus can support one master node and a plurality of slave nodes. In the embodiment of the invention, because the system connected with the automobile audio bus is constructed through the automobile audio bus, the automobile audio bus connected with the main node is generally more important in the system constructed through the automobile audio bus, so the automobile audio node can comprise the main node in each node in communication connection with the automobile audio bus, and the automatic test of the automobile audio bus connected with the main node can be realized.
For example, the car audio node may be an In-Vehicle Infotainment (IVI) that may be the master node.
The automobile audio bus test system provided by the embodiment of the invention comprises a data transceiver and a bus test device, wherein the data transceiver comprises a first data communication module and a first bus communication module in communication connection with an automobile audio bus to be tested, and the test device comprises a data simulation module and a second data communication module in communication connection with the first data communication module; the system provided by the embodiment of the invention can simulate the simulated audio data which can be transmitted in the automobile audio bus through the data simulation module so as to generate the audio data without depending on a node, and send the simulated audio data to the second data communication module; the second data communication module receives the analog audio data sent by the data analog module and sends the analog audio data to the first data communication module so as to realize interaction between the data transceiver and the bus test device; the first data communication module receives the analog audio data sent by the second data communication module and sends the analog audio data to the first bus communication module; the first bus communication module is used for receiving the analog audio data sent by the first data communication module, sending the analog audio data to the automobile audio bus, receiving communication feedback information sent by an automobile audio node in communication connection with the automobile audio bus aiming at the analog audio data, and testing the data sending function of the automobile audio bus based on the communication feedback information. The test system not only can automatically test the automobile audio bus, but also can reduce the dependency on nodes on the automobile audio bus.
According to an optional technical scheme, the automobile audio bus comprises at least two bus channels, and the data receiving and transmitting device further comprises a data processing module; the data simulation module is specifically used for simulating at least two pieces of analog audio data which can be transmitted in an automobile audio bus, coding the acquired first channel information and the at least two pieces of analog audio data, and sending an acquired first coding result to the second data communication module, wherein the first channel information is used for representing each piece of analog audio data in the at least two pieces of analog audio data, and the at least two bus channels are bus channels used for sending the analog audio data; the second data communication module is specifically used for receiving the first coding result sent by the data simulation module and sending the first coding result to the first data communication module; the first data communication module is specifically used for receiving a first coding result sent by the second data communication module and sending the first coding result to the data processing module; the data processing module is used for receiving the first coding result sent by the data processing module, decoding the first coding result and sending at least two analog audio data obtained by decoding and first channel information to the first bus communication module; the first bus communication module is specifically used for receiving at least two pieces of analog audio data and first channel information sent by the data processing module, sending the analog audio data to bus channels used for sending the analog audio data in at least two bus channels in the automobile audio bus based on the first channel information aiming at each piece of analog audio data in the at least two pieces of analog audio data, and receiving communication feedback information sent by an automobile audio node in communication connection with the automobile audio bus aiming at the analog audio data so as to test the data sending function of the automobile audio bus based on the communication feedback information.
It should be noted that the car audio bus is a digital audio bus with two-way and multi-bus channels, and each bus channel can transmit audio data of one sound channel. Therefore, in the embodiment of the invention, the test on the car audio bus can be a test on a channel of the car audio bus.
The data processing module may be understood as a module capable of performing data processing such as encoding or decoding on audio data. The first channel information may be information representing a bus channel for transmitting analog audio data in at least two bus channels for each analog audio data in at least two analog audio data, and the first channel information may be automatically input and set by an automobile audio bus tester based on an external input device according to actual test requirements, or may be automatically generated by the data simulation module after simulating at least two analog audio data according to the content type of the analog audio data, the number of the bus channels, and/or the number of the tested bus channels. The first encoding result may be understood as a result of encoding at least two analog audio data.
It is further noted that the at least two analog audio data may be at least two monaural analog audio data. Since each bus channel can transmit audio data of one channel, at least two analog audio data are simulated, and a bus channel for transmitting the analog audio data needs to be set for each analog audio data.
In the embodiment of the present invention, in order to increase the data transmission speed, the acquired first channel information and the at least two pieces of analog audio data may be encoded. The method for encoding the acquired first channel information and the at least two pieces of analog audio data may be to encode the first channel information and the at least two pieces of analog audio data into a sequence or a matrix.
Optionally, in order to test whether at least two bus channels of the automobile audio bus are asynchronous in data sending time sequence, a transmission corresponding relationship on the time sequence may be set for a transmission sequence of audio data signals of the at least two analog audio data in the bus channels after the at least two analog audio data are simulated, and the data simulation module may encode the audio data signals of the at least two analog audio data according to the transmission corresponding relationship on the time sequence of the at least two analog audio data and the first channel information. For example, two analog audio data are required to be encoded, the first analog audio data includes A, B and three audio data signals C, and the serial number of the bus channel corresponding to the transmission data is 1; the second analog audio data includes D, E and F three audio data signals, which correspond to the number 2 of the bus channel transmitting the data. A, D, B, E, C and F respectively have corresponding relations in time sequence, and can be encoded into a first encoding result capable of reflecting the transmission relation of the audio data signals of at least two analog audio data in time sequence and the bus channels corresponding to the at least two analog audio data according to the corresponding relations in time sequence and the first channel information.
Specifically, at least two pieces of analog audio data which can be transmitted in an automobile audio bus are simulated through a data simulation module, the obtained first channel information and the at least two pieces of analog audio data are coded, and an obtained first coding result is sent to a second data communication module; the second data communication module receives the first coding result sent by the data simulation module and sends the first coding result to the first data communication module; the first data communication module receives a first coding result sent by the second data communication module and sends the first coding result to the data processing module; the data processing module receives a first coding result sent by the data processing module, decodes the first coding result, and can send at least two analog audio data obtained by decoding, the data transmission time sequence corresponding relation of the at least two analog audio data and the first channel information to the first bus communication module; the first bus communication module receives at least two pieces of analog audio data sent by the data processing module, the data transmission timing sequence corresponding relation of the at least two pieces of analog audio data, and the first channel information, and sends the analog audio data to bus channels used for sending the analog audio data in at least two bus channels in the automobile audio bus based on the first channel information and the data transmission timing sequence corresponding relation of the at least two pieces of analog audio data, as can be known from the above examples, a and D are sent to the bus channels numbered 1 and 2 at the same time, B and E are sent to the bus channels numbered 1 and 2 at the same time, and C and F are sent to the bus channels numbered 1 and 2 at the same time. And receiving communication feedback information sent by an automobile audio node in communication connection with the automobile audio bus aiming at the analog audio data so as to test the data sending function of the automobile audio bus based on the communication feedback information. The feedback information may include whether the data transmission of the car audio bus is successful or not, and whether the audio signals of the analog audio data transmitted at each moment correspond to each other or not.
Optionally, the data simulation module may further send a bus channel control command to the data transceiver through the second data communication module, where the bus channel control command may carry a serial number corresponding to a bus channel that needs to be opened or closed, so that the data transceiver opens or closes the bus channel corresponding to the serial number according to the bus channel control command. The bus channel control command can be automatically input by an automobile audio bus tester through the data simulation module based on an external input device according to actual test requirements.
In the embodiment of the invention, at least two analog audio data can be simulated to simultaneously test the data sending functions of at least two bus channels, and the data transmission speed can be increased by encoding and decoding the at least two analog audio data and the first channel information.
Another optional technical scheme is that the automobile audio bus comprises at least two bus channels, and the data transceiver further comprises a data processing module; the data simulation module is specifically used for simulating simulated audio data which can be transmitted in an automobile audio bus and comprises at least two sound channels, coding the obtained second channel information and the simulated audio data, and sending the obtained second coding result to the second data communication module, wherein the second channel information is used for representing each sound channel audio data in the simulated audio data, and the at least two bus channels are bus channels used for sending the sound channel audio data; the second data communication module is specifically used for receiving a second coding result sent by the data simulation module and sending the second coding result to the first data communication module; the first data communication module is specifically used for receiving a second coding result sent by the second data communication module and sending the second coding result to the data processing module; the data processing module is used for receiving the second coding result sent by the data processing module, decoding the second coding result and sending the analog audio data and the second channel information obtained by decoding to the first bus communication module; the first bus communication module is specifically used for receiving the audio data and the second channel information sent by the data processing module, sending the sound channel audio data to at least two bus channels in the automobile audio bus for sending the sound channel audio data based on the second channel information aiming at each sound channel audio data in the analog audio data, and receiving communication feedback information sent by an automobile audio node in communication connection with the automobile audio bus aiming at the analog audio data so as to test the data sending function of the automobile audio bus based on the communication feedback information.
The second channel information may be information of a bus channel used for sending the channel audio data in at least two bus channels for each channel audio data in the analog audio data, the second channel information may be automatically input by an automobile audio bus tester based on an external input device according to actual test requirements, or may be automatically generated by the data simulation module according to the content type of the analog audio data, the number of the bus channels and/or the number of the tested bus channels after the analog audio data including at least two channels is simulated. The second encoding result may be understood as a result of encoding analog audio data including at least two channels.
In the embodiment of the invention, at least two pieces of analog audio data which can be transmitted in the automobile audio bus and comprise at least two sound channels can also be simulated. Because each bus channel can transmit the audio data of one channel, after simulating at least two analog audio data containing at least two channels, a bus channel corresponding to the channel for transmitting is set for each channel of each analog audio data. And the bus channel corresponding to each channel of each analog audio data is different.
In the embodiment of the present invention, in order to increase the data transmission speed, the acquired second channel information and the analog audio data may be encoded. The obtained second channel information and the analog audio data including at least two channels may be encoded in a sequence or a matrix, and in this embodiment of the present invention, the encoding method is not limited in any way.
It should be noted that the transmission sequence of the analog audio data including at least two channels in the bus channel may have a time-sequence transmission correspondence. For example, the data simulation module simulates analog audio data including two channels, the analog audio data is dual-channel music audio data, and since audio signals of the audio data of the two channels of the dual-channel music audio data need to be synchronously transmitted according to a certain time sequence corresponding relationship in a transmission process, it can be ensured that audio corresponding to the dual-channel music audio data does not have channel misalignment, if at least the audio data of the two channels of the analog audio data are respectively transmitted to the second data communication module, the corresponding relationship of the audio data of the two channels of the analog audio data including the at least two channels after being transmitted to the at least two bus channels on the time sequence cannot be known. In order to test whether the problem that errors occur in the analog audio data containing at least two sound channels due to the fact that the sound channel data are staggered due to asynchronous transmission data when the multi-channel music audio data are sent to the automobile audio bus, and also in order to ensure that the transmission data quantity sent to the second data communication module is reduced and the sending speed is accelerated, optionally, the data simulation module can encode the analog audio data containing at least two sound channels according to the time sequence corresponding relation of at least two sound channels and the second channel information.
In the embodiment of the invention, analog audio data comprising at least two sound channels can be simulated, and at least two bus channel data transmission functions can be tested simultaneously, and the data transmission speed can be increased by encoding and decoding the analog audio data comprising at least two sound channels and second channel information.
On the basis of the above optional technical solution, in another optional technical solution, the bus test device further includes a data display module; the data simulation module is further used for sending the simulation audio data to the data display module so as to display the simulation audio data to be sent through the data display module.
The data display module is a module for displaying relevant data and relevant parameters in the automobile audio bus test process.
Specifically, the data simulation module may send the analog audio data to the data display module, and the data display module displays relevant parameters of the analog audio data to be sent, for example, the number of the analog audio data, the number of channels of the analog audio data, the content type of the analog audio data, and/or a bus channel used for sending the analog audio data may be displayed.
Optionally, the data display module may be further configured to display a test result of the data sending function of the car audio bus.
In the embodiment of the invention, the data display module is used for displaying the analog audio data to be transmitted, so that the automobile audio bus tester can check the test parameters of the data transmission function of the automobile audio bus, and the automobile audio bus tester can monitor the test process of the data transmission function of the automobile audio bus.
Example two
Fig. 2 is a schematic structural diagram of an automotive audio bus test system according to a second embodiment of the present invention; the car audio bus test system provided by the embodiment can be combined with various optional schemes in the car audio bus test system provided by the embodiment.
Referring to fig. 2, the car audio bus test system provided in this embodiment includes: the test device comprises a data transceiver 210 and a bus test device 220, wherein the data transceiver comprises a first data communication module 2110 and a first bus communication module 2120 in communication connection with an automobile audio bus to be tested, and the test device comprises a data simulation module 2210 and a second data communication module 2220 in communication connection with the first data communication module; the bus test device 220 further includes a data analysis module 2230, and further describes the first bus communication module 2120, the first data communication module 2110 and the second data communication module 2220. The test of the receiving function of the automobile audio bus can be realized.
the data simulation module 2210 is configured to simulate analog audio data that can be transmitted in the car audio bus, and send the analog audio data to the second data communication module.
The first bus communication module 2120 is further configured to receive car audio data and send the car audio data to the first data communication module 2110, where the car audio data is data that is sent to the car audio bus by the car audio node and is forwarded by the car audio bus after being received.
It is understood that the data analysis module 2230 is a module that analyzes the car audio data to test a receiving function of the car audio bus based on the obtained data analysis result.
The automobile audio data may be audio data sent by the automobile audio bus received by the first bus communication module 2120; the car audio data may be voice type data, music type data, alert tone type data, or the like, and the content type of the car audio data is not particularly limited.
It should be noted that after the first bus communication module 2120 receives the car audio data, the car audio data needs to be sent to the bus test device 220, so that the bus test device 220 can test the receiving function of the car audio bus according to the car audio data. Therefore, in the embodiment of the present invention, the first bus communication module 2120 may further transmit the car audio data to the first data communication module 2110 capable of communicating with the bus test device 220.
Specifically, the first bus communication module 2120 receives car audio data sent by a car audio bus, and the first bus communication module 2120 receives the car audio data and sends the car audio data to the first data communication module 2110.
The first data communication module 2110 is further configured to receive the car audio data sent by the first bus communication module 2120 and send the car audio data to the second data communication module 2220.
It should be noted that the car audio data needs to be sent to the bus test device 220, so that the bus test device 220 can test the receiving function of the car audio bus according to the car audio data. Therefore, in the embodiment of the present invention, the car audio data may be transmitted to the second data communication module 2220 capable of communicating with the first data communication module 2110 in the bus test device 220.
The second data communication module 2220 is further configured to receive the car audio data sent by the first data communication module 2110 and send the car audio data to the data analysis module 2230.
In the embodiment of the present invention, after receiving the car audio data sent by the first data communication module 2110, the second data communication module 2220 needs to send the car audio data to the data analysis module 2230 in the bus test device 220, so that the data analysis module 2230 can test the receiving function of the car audio bus according to the car audio data.
The data analysis module 2230 is configured to receive the car audio data sent by the second data communication module 2220, and analyze the car audio data, so as to test a receiving function of the car audio bus based on the obtained data analysis result.
In this embodiment of the present invention, after receiving the car audio data sent by the second data communication module 2220, the data analysis module 2230 analyzes the car audio data, so as to test the receiving function of the car audio bus based on the obtained data analysis result. The method for analyzing the car audio data may be to analyze the frequency of the car audio data, perform speech-to-text recognition on the car audio data, analyze whether data is output in a bus channel for sending the car audio data, and the like, and is not particularly limited in the embodiment of the present invention.
Optionally, the car audio data may be analyzed in different manners according to different content types of the car audio data. For example, if the car audio data is voice type data, the car audio data is analyzed after being recognized by voice-to-character conversion; if the car audio data is music type data, analyzing the frequency of the car audio data; if the car audio data is the prompt tone type data, whether the bus channel for transmitting the car audio data has data output is analyzed.
On the basis of the above embodiment, the bus test device provided by the embodiment of the invention further comprises a data analysis module, and further describes the first bus communication module, the first data communication module and the second data communication module. The automobile audio bus test system provided by the embodiment of the invention firstly receives automobile audio data through the first bus communication module and sends the automobile audio data to the first data communication module; the first data communication module receives the automobile audio data sent by the first bus communication module and sends the automobile audio data to the second data communication module; the second data communication module receives the automobile audio data sent by the first data communication module and sends the automobile audio data to the data analysis module; and finally, the data analysis module receives the automobile audio data sent by the second data communication module, and analyzes the automobile audio data so as to test the receiving function of the automobile audio bus based on the obtained data analysis result. The receiving function of the automobile audio bus can be tested without other nodes.
According to an optional technical scheme, the testing device further comprises a second bus communication module in communication connection with a controller local area network bus, and the controller local area network bus is also in communication connection with an automobile audio node; the second bus communication module is used for receiving test standard data which are sent by the automobile audio node through the controller local area network bus and correspond to the automobile audio data, and sending the test standard data to the data analysis module; and the data analysis module is specifically used for receiving the automobile audio data sent by the second data communication module and the test standard data sent by the second bus communication module, analyzing the automobile audio data based on the test standard data, and testing the data receiving function of the automobile audio bus based on the obtained data analysis result.
The second bus communication module can be understood as a module which is in communication connection with the controller local area network bus, and the second bus communication module can communicate with the automobile audio node based on the controller local area network bus. The test standard data may be understood as data for analyzing the car audio data.
It should be noted that the test standard data may be parameter data required for analysis of the car audio bus. For example, if the automobile audio data is analyzed after voice-to-character recognition, the test standard data may be a character recognition result of the automobile audio bus after the voice-to-character recognition of the automobile audio data is performed under normal conditions; if the frequency of the automobile audio data is analyzed, the test standard data can be the frequency data of the automobile audio bus under the normal condition; if the bus channel for sending the automobile audio data has data output, the test standard data can be whether the bus channel for sending the automobile audio data has data output under normal conditions or not and whether the bus channel which is not used for sending the automobile audio data has no data output or not.
Specifically, the second bus communication module can receive test standard data which are sent by the automobile audio node through the controller local area network bus and correspond to the automobile audio data, and send the test standard data to the data analysis module; the data analysis module receives the automobile audio data sent by the second data communication module and the test standard data sent by the second bus communication module, analyzes the automobile audio data based on the test standard data, judges whether relevant parameters of the automobile audio data meet the test standard data or not to obtain a data analysis result, and tests the data receiving function of the automobile audio bus based on the obtained data analysis result.
In the embodiment of the invention, the data receiving function of the automobile audio bus is tested based on the test standard data which is sent by the automobile audio node received by the second bus communication module through the controller local area network bus and corresponds to the automobile audio data, the data receiving function of the automobile audio bus can be tested without being limited to the fixed test standard in the bus testing device, and the data receiving function of the automobile audio bus can be tested according to different test standards corresponding to current requirements.
Another optional technical scheme is that the automobile audio bus comprises at least two bus channels, and the data transceiver further comprises a data processing module; the first bus communication module is specifically used for sending the received audio data of each channel capable of being combined into automobile audio data to the data processing module, wherein each channel audio data in each channel audio data is data which is sent to a bus channel corresponding to the channel audio data in at least two bus channels by an automobile audio node and is forwarded by the bus channel after being received; the data processing module is used for coding the received audio data of each channel and third channel information corresponding to the audio data of each channel and sending an obtained third coding result to the first data communication module, wherein the third channel information is used for representing a bus channel used for sending the audio data of the channel in at least two bus channels; the first data communication module is specifically used for receiving a third coding result sent by the data processing module and sending the third coding result to the second data communication module; the second data communication module is specifically used for receiving a third coding result sent by the first data communication module and sending the third coding result to the data analysis module; and the data analysis module is specifically used for receiving a third coding result sent by the second data communication module, decoding the third coding result to obtain audio data of each channel and third channel information, and analyzing the audio data of each channel based on the third channel information so as to test the data receiving function of the automobile audio bus based on the obtained data analysis result.
The data processing module may be understood as a module capable of performing data processing such as encoding or decoding on audio data. The third channel information may be information indicating a bus channel for receiving the channel audio data among the at least two bus channels for each of the channel audio data. The third encoding result may be understood as a result of encoding the audio data of each channel.
In the embodiment of the present invention, the received car audio data may be multiple pieces of mono audio data or at least one piece of multi-channel audio data, and each bus channel is capable of receiving channel audio data corresponding to one channel, so that each channel audio data in the channel audio data is data that is sent by the car audio node to the bus channel corresponding to the channel audio data in at least two bus channels and is forwarded by the bus channel after being received. Optionally, the data processing module may encode the audio data signals in the audio data of each channel according to the corresponding relationship of the received audio data of each channel in the time sequence and the third channel information, and encode the audio data signals into a third encoding result that can reflect the transmission relationship of the audio data signals of the audio data of each channel in the time sequence and the bus channel corresponding to the audio data of each channel. The method for encoding the acquired third channel information and the audio data of each channel may be to encode the third channel information and the audio data of each channel into a sequence or a matrix.
Specifically, the first bus communication module sends the received audio data of each channel which can be used as the automobile audio data to the data processing module; the data processing module encodes the received audio data of each channel and third channel information corresponding to the audio data of each channel and sends an obtained third encoding result to the first data communication module; the first data communication module receives a third coding result sent by the data processing module and sends the third coding result to the second data communication module; the second data communication module receives a third coding result sent by the first data communication module and sends the third coding result to the data analysis module; the data analysis module receives a third coding result sent by the second data communication module, decodes the third coding result to obtain audio data of each channel, a corresponding relation of the audio data of each channel in time sequence and third channel information, and analyzes the audio data of each channel based on the third channel information so as to test the data receiving function of the automobile audio bus based on the obtained data analysis result.
In the embodiment of the invention, the data transmission speed can be increased by encoding and decoding the audio data of each channel and the information of the third channel, and meanwhile, the problem that at least two bus channels of the automobile audio bus are asynchronous in the received data time sequence can be tested.
On the basis of the above scheme, in another optional technical scheme, the data analysis module is specifically configured to decode the received third encoding result to obtain each channel audio data and third channel information, determine, for each channel audio data in each channel audio data, a target channel in the at least two bus channels, which receives and forwards the channel audio data, based on the third channel information, and analyze the channel audio data based on the obtained test reference data sent by the car audio node to the target channel, so as to test the data receiving function of the car audio bus based on the obtained data analysis result.
The target channel may be understood as a bus channel which receives channel audio data from at least two bus channels. The test reference data may be understood as data related to the initial audio data sent by the car audio node to the initial channel. The initial channel may be understood as a bus channel from which the car audio node transmits channel audio data from at least two bus channels. The initial audio data can be understood as audio data sent by the car audio node to the initial channel, and the initial audio data is the same as channel audio data normally received by the car audio bus from the target channel.
Optionally, the test reference data may be parameters of the initial audio data, because the amount of data that can be acquired by the bus test device through the controller area network bus is small, and in order to reduce the time required for the test of the automobile audio bus, the test reference data may be sent to the bus test device through the controller area network bus. The parameter of the initial audio data may be a frequency parameter of the initial audio data or a speech-to-text recognition result parameter, etc., and is not particularly limited herein.
It can be understood that, in the case that the test reference data includes the initial audio data, each test reference data is identical to its corresponding channel audio data, and it can be determined that the car audio bus is in a normal state. Under the condition that the test reference data comprises parameters of the initial audio data, the condition that the state of the automobile audio bus is normal can be determined only if the parameters of each test reference data and the corresponding channel audio data are the same. Optionally, the test reference data may further include a number of an initial channel corresponding to the initial audio data. Under the condition that the test reference data comprises the number of the initial channel corresponding to the initial audio data and the initial audio data, the number of the initial channel corresponding to each initial audio data is the same as the number of each target channel, and each initial audio data is the same as the audio data of the channel corresponding to the initial audio data, so that the condition that the automobile audio bus is normal can be determined. Under the condition that the test reference data comprises the number of the initial channel corresponding to the initial audio data and the parameters of the initial audio data, the number of the initial channel corresponding to each initial audio data is the same as the number of each target channel, and the parameters of each initial audio data are the same as the parameters of the audio data of the channel corresponding to the initial audio data, so that the condition that the automobile audio bus is normal can be determined. The parameters of the channel audio data may be frequency parameters or parameters of speech-to-text recognition results, and are not limited herein.
It should be noted that if the speed of testing the car audio bus is required, it is only necessary that the test reference data only include the number of the initial channel corresponding to the initial audio data, and if the number of the initial channel corresponding to each initial audio data is the same as the number of each target channel, it can be determined that the car audio bus is in a normal state.
Optionally, if the received third encoding result is decoded, the corresponding relationship of the audio data of each channel in the time sequence may also be obtained, and the parameter of the audio signal of the audio data of each channel at each time may be compared with the parameter of the audio signal of each initial audio data at the current time in the test reference data, so as to test the receiving function of the car audio bus based on the comparison result and the data analysis result. The parameters of the audio signal may be frequency parameters or parameters of a speech-to-text recognition result, and are not limited in this respect.
In the embodiment of the invention, the data receiving function of the automobile audio bus is tested based on the test reference data sent by the automobile audio node to the target channel, so that the automobile audio bus can be tested more accurately.
On the basis of the above scheme, in another optional technical scheme, the bus test device further comprises a data display module; the data analysis module is also used for sending the data analysis result to the data display module so as to display the data analysis result obtained by analysis through the data display module; and/or the second data communication module is also used for sending the automobile audio data to the data display module so as to display the received automobile audio data through the data display module.
The data display module is a module for displaying relevant data and relevant parameters in the automobile audio bus test process.
Specifically, the data analysis module may send the data analysis result to the data display module, and the data display module displays the data analysis result obtained by the analysis, for example, may display whether the car audio data received by the car audio bus is correct or display whether the car audio bus state is normal; and/or the second data communication module sends the car audio data to the data display module to display the received car audio data through the data display module, for example, the number of the channel audio data, the content type of the audio data of each channel, and/or the bus channel for sending the audio data of each channel can be displayed.
In the embodiment of the invention, the data analysis result and/or the automobile audio data are displayed by the data display module, so that the automobile audio bus tester can check the test parameters of the receiving function of the automobile audio bus, and the automobile audio bus tester can monitor the test process of the receiving function of the automobile audio bus.
In order to better understand the technical solutions of the embodiments of the present invention, another alternative example is provided herein. Illustratively, referring to the figure, 3, a main node IVI in communication connection with a car audio bus is used as a car audio node to be in communication connection with one end of the car audio bus, and the other end of the car audio bus is in communication connection with a data transceiver; the data transceiver communicates with the bus test device through the Ethernet; the microphone and the power amplifier can be used as slave nodes to be connected and communicated with the data transceiver through the automobile audio bus, and the microphone and the power amplifier can receive or send data with the data transceiver so as to test the automobile audio bus between the microphone and the data transceiver; the microphone can also send audio data to the data transceiver through the automobile audio bus to serve as analog audio data so as to test the automobile audio bus between the IVI and the data transceiver; the automobile audio node can comprise a bus communication module which is in communication connection with the controller local area network bus, and the bus communication module, the bus test device and the slave node of the automobile audio node can communicate based on the controller local area network bus. The test process which can be realized by the automobile audio bus test system provided by the embodiment of the invention can be divided into two parts of testing the data sending function of the automobile audio bus and testing the receiving function of the automobile audio bus, and the specific contents are as follows:
if the data sending function of the automobile audio bus is tested, the bus testing device can simulate single-channel analog audio data and acquire a set bus channel for sending the analog audio data; and the bus channel corresponding to each sound channel of the analog audio data which is respectively set can be obtained. And the bus test device encodes the analog audio data and the acquired bus channel for setting the transmission of the analog audio data, and transmits the encoded data to the data transceiver. The data receiving and transmitting device decodes the coded data, sends the analog audio data obtained after decoding to the automobile audio bus, judges whether the data is sent successfully or not according to the received communication feedback information, and displays the judgment result, thereby realizing the function of testing the data sending of the automobile audio bus.
If the receiving function of the automobile audio bus is tested, the data transceiver receives channel audio data sent by each bus channel of the automobile audio bus, the channel audio data and channel information corresponding to the channel audio data are coded on the channel audio data, the coded data are sent to the bus testing device, the bus testing device decodes the coded data, channel information corresponding to the channel audio data and each channel audio data are analyzed, and voice recognition and other operations are carried out on the channel audio data; the bus test device can also receive test standard data sent by the controller local area network bus. The bus testing device analyzes the result of the operation such as voice recognition of the channel audio data, the channel information corresponding to the channel audio data and the testing standard data, and displays the analysis result, thereby realizing the receiving function of the automobile audio bus.
In order to better understand the technical solutions of the embodiments of the present invention, another alternative example is provided herein. For example, referring to fig. 4, in an embodiment of the present invention, a car audio bus test system may include a data transceiver and a bus test device. The data transceiver can be used for receiving or sending data to the automobile audio bus, decoding the data sent by the bus test device into data which need to be transmitted by multiple bus channels respectively and then sending the data to different bus channels of the automobile audio bus, and coding the data sent by the automobile audio bus and then sending the data to the bus test device. The bus test device can be used for receiving and transmitting data of the controller local area network bus, can communicate with the data receiving and transmitting device, can analyze data received by the controller local area network bus and the data receiving and transmitting device, can simulate analog audio data, encode the analog audio data, and display data content received or transmitted and a test result of the automobile audio bus. The data transceiver comprises a first data communication module, a first bus communication module and a data processing module; the bus test device comprises a data simulation module, a second data communication module, a data display module, a data analysis module and a second bus communication module. The first bus communication module is connected with the automobile audio bus and can perform data communication with the automobile audio node through the automobile audio bus; the data processing module can process data received or sent by the automobile audio bus, for example, the data received or sent by the automobile audio bus is encoded or decoded; the first data communication module can communicate with the bus test device, receive or send data to the bus test device, and also can receive a bus channel control command issued by the bus test device. The second data communication module can communicate with the first data communication module; the data display module can display the data content of the receiving node or the data content of the sending node and the test result of the automobile audio bus; the data analysis module can analyze the data received from the controller local area network bus and the data transceiver; the data simulation module simulates analog audio data and encodes the analog audio data; the second bus communication module may communicate with a controller area network bus.
In addition, the car audio bus test system provided by the embodiment belongs to the same technical concept as the car audio bus test system provided by the above embodiment, and the technical details which are not described in detail in the embodiment can be referred to the above embodiment, and the same technical features have the same beneficial effects in the embodiment and the above embodiment.
Claims (10)
1. An automotive audio bus test system, comprising: the test device comprises a data receiving and transmitting device and a bus test device, wherein the data receiving and transmitting device comprises a first data communication module and a first bus communication module in communication connection with an automobile audio bus to be tested, and the test device comprises a data simulation module and a second data communication module in communication connection with the first data communication module; wherein the content of the first and second substances,
the data simulation module is used for simulating the simulated audio data which can be transmitted in the automobile audio bus and sending the simulated audio data to the second data communication module;
the second data communication module is used for receiving the analog audio data sent by the data analog module and sending the analog audio data to the first data communication module;
the first data communication module is used for receiving the analog audio data sent by the second data communication module and sending the analog audio data to the first bus communication module;
the first bus communication module is used for receiving the analog audio data sent by the first data communication module, sending the analog audio data to the automobile audio bus, receiving communication feedback information sent by an automobile audio node in communication connection with the automobile audio bus aiming at the analog audio data, and testing the data sending function of the automobile audio bus based on the communication feedback information.
2. The system of claim 1, wherein the car audio bus comprises at least two bus channels, and the data transceiver further comprises a data processing module; wherein the content of the first and second substances,
the data simulation module is specifically configured to simulate at least two pieces of analog audio data that can be transmitted in the car audio bus, encode the acquired first channel information and the at least two pieces of analog audio data, and send an obtained first encoding result to the second data communication module, where the first channel information is used to represent, for each piece of analog audio data in the at least two pieces of analog audio data, a bus channel in the at least two bus channels that is used to send the analog audio data;
the second data communication module is specifically configured to receive the first encoding result sent by the data simulation module, and send the first encoding result to the first data communication module;
the first data communication module is specifically configured to receive the first encoding result sent by the second data communication module, and send the first encoding result to the data processing module;
the data processing module is configured to receive the first encoding result sent by the data processing module, decode the first encoding result, and send the at least two analog audio data and the first channel information obtained by decoding to the first bus communication module;
the first bus communication module is specifically configured to receive the at least two pieces of analog audio data and the first channel information sent by the data processing module, send, for each piece of analog audio data of the at least two pieces of analog audio data, the analog audio data to a bus channel, which is used for sending the analog audio data, of the at least two bus channels of the car audio bus based on the first channel information, and receive communication feedback information, which is sent by a car audio node in communication connection with the car audio bus for the analog audio data, so as to test a data sending function of the car audio bus based on the communication feedback information.
3. The system of claim 1, wherein the car audio bus comprises at least two bus channels, and the data transceiver further comprises a data processing module; wherein, the first and the second end of the pipe are connected with each other,
the data simulation module is specifically configured to simulate simulated audio data that may be transmitted in the car audio bus and includes at least two channels, encode acquired second channel information and the simulated audio data, and send an obtained second encoding result to the second data communication module, where the second channel information is used to represent, for each channel of the simulated audio data, a bus channel of the at least two bus channels that is used to send the channel audio data;
the second data communication module is specifically configured to receive the second encoding result sent by the data simulation module, and send the second encoding result to the first data communication module;
the first data communication module is specifically configured to receive the second encoding result sent by the second data communication module, and send the second encoding result to the data processing module;
the data processing module is configured to receive the second encoding result sent by the data processing module, decode the second encoding result, and send the analog audio data and the second channel information obtained by decoding to the first bus communication module;
the first bus communication module is specifically configured to receive the audio data and the second channel information sent by the data processing module, send, for each channel audio data in the analog audio data, the channel audio data to a bus channel in the at least two bus channels in the car audio bus for sending the channel audio data based on the second channel information, receive communication feedback information sent by a car audio node in communication connection with the car audio bus for the analog audio data, and test a data sending function of the car audio bus based on the communication feedback information.
4. The system according to any one of claims 1-3, wherein said bus test device further comprises a data display module; wherein the content of the first and second substances,
the data simulation module is further configured to send the simulated audio data to the data display module, so that the simulated audio data to be sent is displayed through the data display module.
5. The system of claim 1, wherein the bus test device further comprises a data analysis module; wherein the content of the first and second substances,
the first bus communication module is further used for receiving automobile audio data and sending the automobile audio data to the first data communication module, wherein the automobile audio data are data sent to the automobile audio bus by the automobile audio node and forwarded by the automobile audio bus after being received;
the first data communication module is also used for receiving the automobile audio data sent by the first bus communication module and sending the automobile audio data to the second data communication module;
the second data communication module is further configured to receive the car audio data sent by the first data communication module and send the car audio data to the data analysis module;
the data analysis module is used for receiving the automobile audio data sent by the second data communication module and analyzing the automobile audio data so as to test the receiving function of the automobile audio bus based on the obtained data analysis result.
6. The system of claim 5, wherein the test device further comprises a second bus communication module communicatively coupled to a controller area network bus, the controller area network bus further communicatively coupled to the car audio node; wherein the content of the first and second substances,
the second bus communication module is used for receiving test standard data which are sent by the automobile audio node through the controller local area network bus and correspond to the automobile audio data, and sending the test standard data to the data analysis module;
the data analysis module is specifically configured to receive the car audio data sent by the second data communication module and the test standard data sent by the second bus communication module, and analyze the car audio data based on the test standard data, so as to test a data receiving function of the car audio bus based on an obtained data analysis result.
7. The system of claim 5, wherein the car audio bus comprises at least two bus channels, and the data transceiver further comprises a data processing module; wherein the content of the first and second substances,
the first bus communication module is specifically configured to send the received audio data of each channel that may be combined into the car audio data to the data processing module, where each channel audio data in the audio data of each channel is data that is sent by the car audio node to a bus channel corresponding to the audio data of the channel in the at least two bus channels and is forwarded by the bus channel after being received;
the data processing module is configured to encode the received audio data of each channel and third channel information corresponding to the audio data of each channel, and send an obtained third encoding result to the first data communication module, where the third channel information is used to indicate a bus channel used to send the audio data of each channel in the at least two bus channels;
the first data communication module is specifically configured to receive the third encoding result sent by the data processing module, and send the third encoding result to the second data communication module;
the second data communication module is specifically configured to receive the third encoding result sent by the first data communication module, and send the third encoding result to the data analysis module;
the data analysis module is specifically configured to receive the third coding result sent by the second data communication module, decode the third coding result to obtain the audio data of each channel and the third channel information, and analyze the audio data of each channel based on the third channel information to test a data receiving function of the automobile audio bus based on the obtained data analysis result.
8. The system of claim 7, wherein:
the data analysis module is specifically configured to decode the received third encoding result to obtain the audio data of each channel and the third channel information, determine, for each channel audio data in the audio data of each channel, a target channel in the at least two bus channels, which receives and forwards the channel audio data, based on the third channel information, and analyze the channel audio data based on the obtained test reference data sent by the car audio node to the target channel, so as to test a data receiving function of the car audio bus based on the obtained data analysis result.
9. The system according to any one of claims 5-8, wherein said bus test device further comprises a data display module; wherein, the first and the second end of the pipe are connected with each other,
the data analysis module is further configured to send the data analysis result to the data display module, so that the data analysis result obtained through analysis is displayed through the data display module;
and/or the presence of a gas in the atmosphere,
the second data communication module is further configured to send the car audio data to the data display module, so that the received car audio data is displayed through the data display module.
10. The system of claim 1, wherein the car audio node comprises a master node of the nodes communicatively coupled to the car audio bus.
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