CN113834977A - Multi-path LVDS (Low Voltage differential Signaling) signal test verification system and method - Google Patents
Multi-path LVDS (Low Voltage differential Signaling) signal test verification system and method Download PDFInfo
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Abstract
The invention provides a multi-channel LVDS signal test verification system, which is used for an aging function test of an automobile electronic product and comprises a one-out-of-multiple channel selection module, an LVDS signal receiving module, a signal selection module, a signal conversion output module and a controller module, wherein the signal conversion output module is connected with a display screen. The invention also discloses a corresponding method. The embodiment of the invention adopts a time-sharing multiplexing method, and can solve the problem of monitoring the quality and the function of a plurality of products by simultaneously outputting only one LVDS receiver and one display screen; the signal selection module is adopted to meet the requirement of realizing the conversion of the LVDS signals and other various signals under the condition that related equipment does not need to be reconfigured. The cost of the product aging activity is saved, the operation of technical personnel in the product aging process is facilitated, the misoperation probability is reduced, and the efficiency of the product aging verification activity is improved.
Description
Technical Field
The invention relates to the technical field of Low-Voltage Differential Signaling (LVDS) output monitoring, in particular to a multi-path LVDS test verification system and a multi-path LVDS test verification method for detecting the aging function of an automobile electronic product.
Background
In the aging verification process of the function detection of the automobile electronic product, the quality and the function of the output LVDS video signal need to be detected and monitored for a long time. In the actual product aging verification production activity, aging verification is often required to be carried out on a large batch of products at the same time (for example, the aging verification conditions are generally 60 ℃ for 2 hours), the original method for product aging verification is to adopt an automobile electronic product to connect a display screen through an LVDS (Low Voltage differential Signaling) line for aging function detection, and the defects are high cost, space occupation, inconvenient process inspection and the like; for the aging verification occasion of function detection of batched electronic products, the aging verification occasion is realized by connecting a display screen, and the efficiency is very low.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a multi-path LVDS signal test verification method and a multi-path LVDS signal test verification system, which can simultaneously perform aging verification on a plurality of automobile electronic products, improve the working efficiency and have good compatibility.
In order to solve the above technical problems, an aspect of the present invention provides a multi-channel LVDS signal testing and verifying system for testing an aging function of an automotive electronic product, the system including a one-out-of-multiple channel selection module, an LVDS signal receiving module, a signal selection module, a signal conversion output module and a controller module, the signal conversion output module being connected to a display screen, wherein:
the multi-channel-to-one-out selection module is connected with multi-channel LVDS input signals from a plurality of automobile electronic products, is used for selecting at least part of the LVDS input signals under the control of the controller module, and periodically outputs the selected LVDS input signals to the LVDS signal receiving module in a time-sharing multiplexing mode;
the LVDS signal receiving module is used for receiving the output signal output by the one-out-of-multiple channel selection module in a time-sharing multiplexing mode to form a path of composite LVDS signal;
the signal selection module is used for selecting a target format signal channel and outputting the composite LVDS signals from the target format signal channel;
the signal conversion and output module is internally provided with a plurality of signal conversion units, and each signal conversion unit is connected with one target format signal channel of the signal selection module and is used for converting the composite LVDS signal into a verification signal in a target format;
the controller module is used for selecting at least part of the LVDS input signals and switching sequences in turn, and selecting a target format signal channel of the signal selection module;
and the display screen is used for receiving and displaying the verification signal so as to carry out aging verification processing.
Wherein, the target format at least comprises one of HDMI, CVBS, DVI, VGA and RGB.
Wherein the controller module further comprises:
the chip selection processing unit is used for setting the number and sequence of chip-selected channels of the one-out-of-multiple channel selection module and the time of each period and generating a control signal;
and the target format selection unit is used for setting the serial number of the signal channel of the target format to be selected by the signal selection module and generating a control signal.
The signal selection module is specifically configured to, after receiving a control signal from the controller module, identify a target format signal channel determined therein, and switch the selection switch to a corresponding target format signal channel, so as to output the composite LVDS signal from the target format signal channel.
The signal selection module is provided with a selection key corresponding to each target format signal channel.
Correspondingly, another aspect of the present invention further provides a multi-channel LVDS signal testing and verifying system, which is used in an aging function test of an automotive electronic product, and is implemented by using the foregoing system, and which includes the following steps:
step S11, receiving LVDS signals output by a plurality of automobile electronic products at the input end of the one-out-of-multiple channel selection module, selecting at least part of the LVDS input signals under the control of the controller module, and periodically outputting the selected LVDS signals to the LVDS signal receiving module in a time-sharing multiplexing mode;
step S12, receiving the output signal of the one-out-of-multiple channel selection module for time-sharing multiplexing to form a path of composite LVDS signal;
step S13, selecting a target format signal channel, and outputting the composite LVDS signal from the target format signal channel;
step S14, converting the composite LVDS signal into a verification signal in a target format according to the target signal format selected by the signal selection module;
and step S15, receiving and displaying the verification signal to perform aging verification processing.
Wherein, the target format at least comprises one of HDMI, CVBS, DVI, VGA and RGB.
Wherein, further include:
presetting the number and sequence of channels selected by a channel selection module and the time of each period in a controller module, and generating a control signal;
and presetting the serial number of the signal channel with the target format to be selected by the signal selection module in the controller module, and generating a control signal.
Wherein, the step S13 specifically includes:
the signal selection module identifies the determined target format signal channel after receiving the control signal from the controller module, and switches the selection switch to the corresponding target format signal channel, so that the composite LVDS signal is output from the target format signal channel.
Wherein, the step S13 specifically includes:
and determining a target format signal channel by identifying the state of the selection key, and switching the selection switch to the corresponding target format signal channel, so that the composite LVDS signal is output from the target format signal channel.
The embodiment of the invention has the following beneficial effects:
according to the multi-channel LVDS test verification method and system provided by the embodiment of the invention, the multi-channel LVDS input channels are sequentially switched in turn by adopting the one-out-of-multiple channel selection module, the LVDS signal receiving module, the signal selection module and the like and a time-sharing multiplexing method, so that the multi-channel LVDS can be multiplexed into one-channel LVDS signal and displayed. Meanwhile, a signal selection module is adopted, the LVDS signals are converted into required target format signals according to actual requirements through the control of the main controller on the module, and the target format signals are output. The scheme of the invention can meet the requirement of the transmission of switching the multi-channel LVDS signals into one path of LVDS signals one by one and can also meet the requirement of switching the LVDS signals with other format signals. The cost generated by the aging activity of the automobile electronic product can be saved; meanwhile, the operation of technical personnel in the production detection process is facilitated, the misoperation probability is reduced, the production detection activity efficiency is improved, the compatibility is good, and the method can adapt to various target signal formats.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be 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 within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a multi-channel LVDS signal test verification system according to the present invention;
FIG. 2 is a schematic structural diagram of a controller module of FIG. 1;
fig. 3 is a main flow diagram of a multi-channel LVDS signal test verification method according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a multi-channel LVDS signal testing and verifying system according to the present invention, and is shown in fig. 2. In this embodiment, the multi-channel LVDS signal testing and verifying system is used in an aging function test of an automotive electronic product, and the system includes a one-out-of-multiple channel selection module 1, an LVDS signal receiving module 2, a signal selection module 3, a signal conversion output module 5 and a controller module 4, where the signal conversion output module 5 is connected to a display screen 6, where:
the one-out-of-multiple channel selection module 1 is connected with multiple paths of LVDS input signals from multiple automobile electronic products, is used for selecting at least part of the LVDS input signals under the control of the controller module 4, and periodically outputs the selected LVDS input signals to the LVDS signal receiving module in a time-sharing multiplexing mode; for example, in one example, switching may take turns from channel 1 to channel n; in other examples, a part of the channels may be selected and switched in turn according to the sequence determined by the controller module 4; the switching time for each channel may be pre-selected.
The LVDS signal receiving module 2 is configured to receive an output signal output by the one-out-of-multiple channel selection module in a time-division multiplexing manner, so as to form a composite LVDS signal.
A signal selection module 3, configured to select a target format signal channel under the control of the controller module 4, and output the composite LVDS signal from the target format signal channel; the target format at least comprises one of HDMI, CVBS, DVI, VGA and RGB. The signal selection module 3 assigns a channel to each target format signal and identifies the code. For example, the HDMI format is assigned channel a, the CVBS format is assigned channel B, and so on. In a specific example, the signal selection module 3 is specifically configured to, after receiving the control signal from the controller module 4, identify a target format signal channel determined therein, and switch the selection switch to the corresponding target format signal channel, so as to output the composite LVDS signal from the target format signal channel.
The signal conversion and output module 6 is internally provided with a plurality of signal conversion units, each signal conversion unit is connected with one target format signal channel of the signal selection module and is used for converting the composite LVDS signal into a verification signal in a target format; it is understood that the conversion of LVDS signals into HDMI, CVBS, DVI, VGA, RGB format signals is well known in the art and will not be described in detail herein.
And the controller module 4 is used for selecting at least part of the LVDS input signals and switching the sequence in turn, and selecting a target format signal channel of the signal selection module.
And the display screen 6 is used for receiving and displaying the verification signal so as to carry out aging verification processing.
Wherein the controller module 4 further comprises:
a chip selection processing unit 40, configured to set the number and sequence of channels for chip selection of the one-out-of-multiple channel selection module and the time of each period, and generate a control signal;
and a target format selecting unit 41, configured to set a serial number of a target format signal channel to be selected by the signal selecting module, and generate a control signal.
In another example, a selection key corresponding to each target format signal channel is provided in the signal selection module 3. By identifying the state of the selection key, a target format signal channel can be determined, and the selection switch is switched to the corresponding target format signal channel, so that the composite LVDS signal is output from the target format signal channel.
The embodiment of the invention solves the problem that a plurality of receivers are needed for multi-channel LVDS signal transmission, and only one chip selection module (a multi-channel selection module) and one LVDS signal receiving module are used for sequentially switching a plurality of channels in turn by adopting a time-sharing multiplexing method. Meanwhile, the LVDS signals are converted into signals with various target formats according to actual requirements and output. The cost generated by the aging activity of the automobile electronic product can be saved, the operation of technical personnel in the production and detection process is facilitated, the misoperation probability is reduced, and the efficiency of the production and detection activity is improved.
Fig. 3 is a schematic main flow chart of a multi-channel LVDS signal test verification method according to the present invention. In this embodiment, the method is implemented by using the system shown in fig. 1 and fig. 2, and includes the following steps:
step S11, receiving LVDS signals output by a plurality of automobile electronic products at the input end of the one-out-of-multiple channel selection module, selecting at least part of the LVDS input signals under the control of the controller module, and periodically outputting the selected LVDS signals to the LVDS signal receiving module in a time-sharing multiplexing mode;
step S12, receiving the output signal of the one-out-of-multiple channel selection module for time-sharing multiplexing to form a path of composite LVDS signal;
step S13, under the control of the controller module, selecting a target format signal channel and outputting the composite LVDS signal from the target format signal channel, wherein the target format at least comprises one of HDMI, CVBS, DVI, VGA and RGB;
step S14, converting the composite LVDS signal into a verification signal in a target format according to the target signal format selected by the signal selection module;
and step S15, receiving and displaying the verification signal to perform aging verification processing.
Wherein, further include:
presetting the number and sequence of channels selected by a channel selection module and the time of each period in a controller module, and generating a control signal;
and presetting the serial number of the signal channel with the target format to be selected by the signal selection module in the controller module, and generating a control signal.
In a specific example, the step S13 specifically includes:
the signal selection module identifies the determined target format signal channel after receiving the control signal from the controller module, and switches the selection switch to the corresponding target format signal channel, so that the composite LVDS signal is output from the target format signal channel.
In another specific example, the step S13 specifically includes:
and determining a target format signal channel by identifying the state of the selection key, and switching the selection switch to the corresponding target format signal channel, so that the composite LVDS signal is output from the target format signal channel.
More information can be combined with the description of fig. 1 to fig. 2, which is not repeated herein.
The embodiment of the invention has the following beneficial effects:
according to the multi-channel LVDS test verification method and system provided by the embodiment of the invention, the multi-channel LVDS input channels are sequentially switched in turn by adopting the one-out-of-multiple channel selection module, the LVDS signal receiving module, the signal selection module and the like and a time-sharing multiplexing method, so that the multi-channel LVDS can be multiplexed into one-channel LVDS signal and displayed. Meanwhile, a signal selection module is adopted, the LVDS signals are converted into required target format signals according to actual requirements through the control of the main controller on the module, and the target format signals are output. The scheme of the invention can meet the requirement of the transmission of switching the multi-channel LVDS signals into one path of LVDS signals one by one and can also meet the requirement of switching the LVDS signals with other format signals. The cost generated by the aging activity of the automobile electronic product can be saved; meanwhile, the operation of technical personnel in the production detection process is facilitated, the misoperation probability is reduced, the production detection activity efficiency is improved, the compatibility is good, and the method can adapt to various target signal formats.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (10)
1. A multi-channel LVDS signal test verification system is used in an aging function test of an automobile electronic product, and is characterized by comprising a multi-channel selection module, an LVDS signal receiving module, a signal selection module, a signal conversion output module and a controller module, wherein the signal conversion output module is connected with a display screen, and the display screen comprises:
the multi-channel-to-one-out selection module is connected with multi-channel LVDS input signals from a plurality of automobile electronic products, is used for selecting at least part of the LVDS input signals under the control of the controller module, and periodically outputs the selected LVDS input signals to the LVDS signal receiving module in a time-sharing multiplexing mode;
the LVDS signal receiving module is used for receiving the output signal output by the one-out-of-multiple channel selection module in a time-sharing multiplexing mode to form a path of composite LVDS signal;
the signal selection module is used for selecting a target format signal channel and outputting the composite LVDS signals from the target format signal channel;
the signal conversion and output module is internally provided with a plurality of signal conversion units, and each signal conversion unit is connected with one target format signal channel of the signal selection module and is used for converting the composite LVDS signal into a verification signal in a target format;
the controller module is used for selecting at least part of the LVDS input signals and switching sequences in turn, and selecting a target format signal channel of the signal selection module;
and the display screen is used for receiving and displaying the verification signal so as to carry out aging verification processing.
2. The system of claim 1, wherein the object format includes at least one of HDMI, CVBS, DVI, VGA, RGB.
3. The system of claim 1 or 2, wherein the controller module further comprises:
the chip selection processing unit is used for setting the number and sequence of chip-selected channels of the one-out-of-multiple channel selection module and the time of each period and generating a control signal;
and the target format selection unit is used for setting the serial number of the signal channel of the target format to be selected by the signal selection module and generating a control signal.
4. The system of claim 3, wherein the signal selection module is specifically configured to, upon receiving a control signal from the controller module, identify a target format signal channel determined therein, and switch the selection switch to the corresponding target format signal channel, thereby outputting the composite LVDS signal from the target format signal channel.
5. The system of claim 3, wherein the signal selection module is provided with a selection key corresponding to each target format signal channel.
6. A multi-path LVDS signal testing and verifying system used for an aging function test of an automotive electronic product and realized by the system of any one of claims 1 to 4, characterized by comprising the following steps:
step S11, receiving LVDS signals output by a plurality of automobile electronic products at the input end of the one-out-of-multiple channel selection module, selecting at least part of the LVDS input signals under the control of the controller module, and periodically outputting the selected LVDS signals to the LVDS signal receiving module in a time-sharing multiplexing mode;
step S12, receiving the output signal of the one-out-of-multiple channel selection module for time-sharing multiplexing to form a path of composite LVDS signal;
step S13, selecting a target format signal channel, and outputting the composite LVDS signal from the target format signal channel;
step S14, converting the composite LVDS signal into a verification signal in a target format according to the target signal format selected by the signal selection module;
and step S15, receiving and displaying the verification signal to perform aging verification processing.
7. The method of claim 6, wherein the object format comprises at least one of HDMI, CVBS, DVI, VGA, RGB.
8. The method of claim 6 or 7, further comprising:
presetting the number and sequence of channels selected by a channel selection module and the time of each period in a controller module, and generating a control signal;
and presetting the serial number of the signal channel with the target format to be selected by the signal selection module in the controller module, and generating a control signal.
9. The method according to claim 8, wherein the step S13 specifically includes:
the signal selection module identifies the determined target format signal channel after receiving the control signal from the controller module, and switches the selection switch to the corresponding target format signal channel, so that the composite LVDS signal is output from the target format signal channel.
10. The method according to claim 8, wherein the step S13 specifically includes:
and determining a target format signal channel by identifying the state of the selection key, and switching the selection switch to the corresponding target format signal channel, so that the composite LVDS signal is output from the target format signal channel.
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