CN112261283A - Synchronous acquisition method, device and system of high-speed camera - Google Patents
Synchronous acquisition method, device and system of high-speed camera Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
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- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/04—Speed or phase control by synchronisation signals
- H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
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Abstract
The invention discloses a synchronous acquisition method, a device and a system of a high-speed camera, wherein the method comprises the following steps: decoding the acquired satellite time service signal according to a preset decoding rule to generate a synchronous signal; when a target event occurs, generating a start-stop signal; when the start-stop signal is detected and the rising edge information of the synchronous signal is detected, a camera acquisition signal is generated, and the camera starts to acquire image information according to the camera acquisition signal. By implementing the invention, the synchronous signal generated by combining the satellite time service signal can avoid the deviation and error of the acquisition time, solve the problems of single synchronous signal source, lower precision and higher delay of the synchronous signal in the related technology, which causes lower accuracy of synchronous acquisition, meet the requirements of high-speed continuous shooting on precision and synchronization, and provide effective and reliable data for later work such as scientific research, detection and the like.
Description
Technical Field
The invention relates to the field of industrial equipment control, in particular to a synchronous acquisition method, a synchronous acquisition device and a synchronous acquisition system for a high-speed camera.
Background
With the rapid development of high-speed digital camera technology, systems for acquiring and processing images by using high-speed cameras have been widely applied to various fields such as scientific research, military industry, discrete manufacturing industry, intelligent transportation and the like. Especially in some fields where the human eye cannot observe, a plurality of high-speed digital cameras are required to acquire image data synchronously. For example, the detection of multi-face defects of materials in the processing industry, the multi-angle observation of automobile collision in the automobile manufacturing industry, the modeling observation of atomization effect in scientific research, and the like. When multiple high-speed digital cameras are used in these scenes, it is necessary for the cameras to acquire simultaneously.
However, in the related art, the image acquisition system generally comprises a high-speed camera, an image acquisition card and a PC, the image acquisition card acquires an image or a data stream by using the high-speed camera as a front end, and the PC processes the image and obtains a corresponding result. In this mode, the trigger pulse signal is calculated by the data acquisition circuit and then distributed to each image acquisition card by the distributor, thereby achieving synchronization. The synchronous signal source based on the image acquisition system is single, the precision is low, the time delay of the synchronous signal is high, and the accuracy of synchronous acquisition is low.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defects of the prior art that the accuracy of synchronous acquisition is low due to the fact that a synchronous signal source is single, the precision is low, and the delay of a synchronous signal is high, so as to provide a synchronous acquisition method, device and system of a high-speed camera.
According to a first aspect, an embodiment of the present invention provides a synchronous acquisition method for a high-speed camera, including: acquiring a satellite time service signal, and decoding the satellite time service signal to generate a synchronous signal; when a start-stop signal is detected, generating a camera acquisition signal according to the rising edge information of the synchronous signal; and acquiring image information according to the camera acquisition signal.
With reference to the first aspect, in a first implementation manner of the first aspect, the decoding to generate the synchronization signal according to the satellite timing signal specifically includes: analyzing the satellite time service signal to generate a month signal, a day signal, an hour signal, a minute signal, a second signal and zone bit information; carrying out frequency division processing on the second signal to generate a microsecond signal and a nanosecond signal; and generating the synchronous signal according to the microsecond signal, the nanosecond signal and the zone bit information.
With reference to the first embodiment of the first aspect, in a second embodiment of the first aspect, the method further includes: after the step of acquiring image information, the method further comprises the following steps: clearing the received satellite time service signal; acquiring shooting information of the high-speed camera, wherein the shooting information comprises shooting mode information and shooting number information; and determining the start-stop zone bit information according to the shooting mode information and the shooting number information, and adding the start-stop zone bit information into the image information to generate original image data.
With reference to the second implementation manner of the first aspect, in a third implementation manner of the first aspect, the start-stop flag bit information includes a start-stop signal valid flag and a start-stop signal invalid flag.
With reference to the third implementation manner of the first aspect, in the fourth implementation manner of the first aspect, after the step of generating the original image data, the method further includes: and detecting the start-stop flag bit information, and when the start-stop flag bit information is a valid start-stop signal flag, returning to execute the step of generating a camera acquisition signal according to the rising edge information of the synchronous signal when the start-stop signal is detected, to the step of acquiring image information according to the camera acquisition signal.
With reference to the fourth embodiment of the first aspect, in the fifth embodiment of the first aspect, the method further includes: generating timestamp information according to the month signal, the day signal, the hour signal, the minute signal, the microsecond signal and the nanosecond signal; and generating target image data according to the timestamp information and the original image data.
According to a second aspect, an embodiment of the present invention provides a synchronous acquisition apparatus for a high-speed camera, including: the time service synchronization box is used for acquiring satellite time service signals; the synchronous signal generating module is used for decoding and generating a synchronous signal according to the satellite time service signal; the camera acquisition signal generation module is used for generating a camera acquisition signal according to the rising edge information of the synchronous signal when the start-stop signal is detected; and the photosensitive camera is used for acquiring image information according to the camera acquisition signal.
With reference to the second aspect, in a first implementation manner of the second aspect, the synchronization signal generating module specifically includes: the decoding submodule is used for analyzing the satellite time service signal and generating a month signal, a day signal, an hour signal, a minute signal, a second signal and zone bit information; the frequency division submodule is used for carrying out frequency division processing on the second signal to generate a microsecond signal and a nanosecond signal; and generating the synchronous signal according to the microsecond signal, the nanosecond signal and the zone bit information.
With reference to the first embodiment of the second aspect, in a second embodiment of the second aspect, the apparatus further comprises: the time recording module is used for generating timestamp information according to the month signal, the day signal, the hour signal, the minute signal, the microsecond signal and the nanosecond signal; and the time stamp control module is used for generating target image data according to the time stamp information and the original image data.
According to a third aspect, an embodiment of the present invention provides a synchronous acquisition system for a high-speed camera, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the one processor to cause the at least one processor to perform the steps of the method of synchronized acquisition of a high speed camera of any one of claims 1-6; the high-speed cameras are used for acquiring image information according to the camera acquisition signals.
According to a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the synchronous acquisition method of a high-speed camera according to the first aspect or any implementation manner of the first aspect.
The technical scheme of the invention has the following advantages:
1. the invention provides a synchronous acquisition method, a synchronous acquisition device and a synchronous acquisition system for a high-speed camera, wherein the method comprises the following steps: decoding the acquired satellite time service signal according to a preset decoding rule to generate a synchronous signal; when a target event occurs, generating a start-stop signal; when the start-stop signal is detected and the rising edge information of the synchronous signal is detected, a camera acquisition signal is generated, and the camera starts to acquire image information according to the camera acquisition signal. By implementing the invention, the synchronous signal generated by combining the satellite time service signal can avoid the deviation and error of the acquisition time, solve the problems of single synchronous signal source, lower precision and higher delay of the synchronous signal in the related technology, which causes lower accuracy of synchronous acquisition, meet the requirements of high-speed continuous shooting on precision and synchronization, and provide effective and reliable data for later work such as scientific research, detection and the like.
2. The invention provides a synchronous acquisition method, a synchronous acquisition device and a synchronous acquisition system for a high-speed camera, wherein the method comprises the following steps: the synchronous signal generated by combining the satellite time service signal can automatically acquire standard time in real time, automatically calibrate the time, and cannot influence the stability of the synchronous signal due to the operation deviation of an industrial control system.
Drawings
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 described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a specific example of a synchronous acquisition method of a high-speed camera according to an embodiment of the present invention;
fig. 2 is a timing chart of a specific example of the synchronous acquisition method of the high-speed camera in the embodiment of the present invention;
FIG. 3 is a diagram illustrating an embodiment of a synchronous acquisition method for a high-speed camera according to the present invention;
FIG. 4 is a diagram illustrating another embodiment of a synchronous acquisition method for a high-speed camera according to the present invention;
FIG. 5 is a schematic block diagram of a specific example of a synchronous acquisition device of a high-speed camera in an embodiment of the invention;
fig. 6 is a schematic block diagram of another specific example of the synchronous acquisition device of the high-speed camera in the embodiment of the invention;
fig. 7 is a diagram illustrating an exemplary embodiment of a processor and a memory in a synchronous acquisition system of a high-speed camera according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood 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 description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In order to solve the problems of larger time offset and lower synchronization accuracy caused by neglecting tiny errors and lacking of synchronization processing in camera synchronization shooting and direct shooting in the related technology, the embodiment of the invention provides a synchronous acquisition method, a device and a system of a high-speed camera, aiming at ensuring the synchronism, integrity, continuity and accuracy of images acquired by a plurality of cameras in a high-speed continuous shooting mode, providing effective and reliable data for later work such as modeling, detection, scientific research and the like, and improving the acquisition accuracy and the synchronization.
The embodiment of the invention provides a synchronous acquisition method of a high-speed camera, which mainly comprises the following steps as shown in figure 1:
step S11: acquiring a satellite time service signal, and decoding the satellite time service signal to generate a synchronous signal; in this embodiment, the satellite time service signal may be time information sent by an external device, for example, a radio frequency signal sent by a Beidou satellite which is directly received, or a time service signal which is sent by an optical fiber after a time service information is obtained by a synchronous time service box through an automatic link network time service source. Decoding may be a process of analyzing the received satellite timing signal in the form of the IRIG-B code to generate a synchronization signal. The synchronization signal may be a pulse signal triggered by a rising edge. Specifically, the camera receives a satellite timing signal transmitted by an external device, analyzes the satellite timing signal according to a decoding rule of an IRIG-B code, and then generates a synchronization signal.
Step S12: when a start-stop signal is detected, generating a camera acquisition signal according to the rising edge information of the synchronous signal; in this embodiment, the start-stop signal may be an initiation signal of a system event, and may be automatically generated when the event is started. When the shooting mode is single-frame shooting, the shooting mode is a first type automatic initiating mode and is not controlled by a feedback signal; when the shooting mode is continuous shooting, the shooting mode is a second type initiating mode and is controlled by the feedback signal, namely the start-stop signal flag bit and the preset continuous shooting time number. Specifically, when a target event starts to start, the system generates a start-stop signal, and when the camera can detect the start-stop signal, the camera enters a shooting preparation state; and because the synchronous signal is effective in rising edge, when the rising edge information of the synchronous signal is detected, the camera acquisition signal is generated, that is, when the start-stop signal is detected and the rising edge information of the synchronous signal is detected, the camera acquisition signal is generated.
Step S13: and acquiring image information according to the camera acquisition signal. In this embodiment, the camera capture signal is applied to the photosensitive CMOS or CCD chip of the camera, that is, the camera is exposed to capture the image information of the target object.
The invention provides a synchronous acquisition method of a high-speed camera, which comprises the following steps: decoding the acquired satellite time service signal according to a preset decoding rule to generate a synchronous signal; when a target event occurs, generating a start-stop signal; when the start-stop signal is detected and the rising edge information of the synchronous signal is detected, a camera acquisition signal is generated, and the camera starts to acquire image information according to the camera acquisition signal. By implementing the invention, the synchronous signal generated by combining the satellite time service signal can avoid the deviation and error of the acquisition time, solve the problems of single synchronous signal source, lower precision and higher delay of the synchronous signal in the related technology, which causes lower accuracy of synchronous acquisition, meet the requirements of high-speed continuous shooting on precision and synchronization, and provide effective and reliable data for later work such as scientific research, detection and the like.
As an alternative embodiment of the present invention, in the step S11, the process of decoding and generating the synchronization signal according to the satellite timing signal specifically includes:
firstly, analyzing a satellite time service signal to generate a month signal, a day signal, an hour signal, a minute signal, a second signal and zone bit information; in this embodiment, the received satellite time signal in the format of the IRIG-B code is resolved according to the decoding rule of the IRIG-B code, and a multi-output signal such as a month signal, a day signal, an hour signal, a minute signal, a second signal, a PPS signal, and the like can be generated. The format of each output signal at this time may be a TTL signal.
Secondly, frequency division processing is carried out on the second signal to generate a microsecond signal and a nanosecond signal; in this embodiment, the generated second signal is directly subjected to frequency division processing, so that the accuracy of synchronous signal acquisition can be improved.
And thirdly, generating a synchronous signal according to the microsecond signal, the nanosecond signal and the zone bit information. In this embodiment, the synchronization trigger signal of the order of "microsecond" or "nanosecond" can be generated by performing or operation based on the PPS signal and the microsecond signal and the nanosecond signal generated by frequency division.
The invention provides a synchronous acquisition method of a high-speed camera, which combines received time service information sent by external time service equipment, generates a multi-path output signal according to a preset IRIG-B code decoding rule, can comprise time signals of month, day, time, minute and second and PPS (pulse per second) flag bit signals, and can acquire standard time in real time and automatically calibrate by taking satellite time service information or network time service information as a synchronous signal source without influencing the stability of the synchronous signal due to system operation deviation.
As an alternative embodiment of the present invention, after the step of acquiring the image information at step S13, the method further includes:
firstly, resetting a received satellite time service signal; in this embodiment, after the start-stop signal is detected, the photosensitive module of the camera enters a shooting preparation state, and when the rising edge information of the synchronization signal is detected, a camera capture signal is generated, that is, the photosensitive module of the camera starts capturing the image information of the target object at this time. And after the image acquisition of the target object is finished, when the camera returns image data, the frame number and microsecond clock signals in the camera are cleared.
Secondly, acquiring shooting information of the high-speed camera, wherein the shooting information comprises shooting mode information and shooting number information; in the present embodiment, the shooting mode information may include a single-shot mode and a continuous shooting mode; the information on the number of shots may be the number of continuous shots determined by the user according to the actual application scene, and may be five, ten or any other number of shots.
And thirdly, determining start-stop zone bit information according to the shooting mode information and the shooting number information, and adding the start-stop zone bit information into the image information to generate original image data. Specifically, the start-stop flag bit information includes a start-stop signal valid flag and a start-stop signal invalid flag. In this embodiment, in the single-sheet shooting mode, after the image information of the target object is acquired, the start/stop signal flag is in an invalid state, that is, after the camera acquires the image data and returns the image data to the storage medium, the start/stop signal flag is also returned, and when it is detected that the start/stop flag is in an invalid state, it is determined that the event shooting is ended.
For example, when the continuous shooting mode is used, the number of continuous shooting events is obtained, when the number of continuous shooting events is not zero, the start-stop flag bit may be in an effective state, that is, after the camera collects image data and returns the image data to the storage medium, the start-stop flag bit may also be returned, when the start-stop flag bit is detected to be in an effective state, it is determined that the previous image collection event is completed, a new start-stop signal may be generated at this time, and then the next image collection event may be performed. And the start-stop signal is in an invalid state until the preset number of the continuous shooting events is cleared, namely, a new start-stop signal is not generated.
As an alternative embodiment of the present invention, after the step of generating the original image data in the above embodiment, the method further includes:
and detecting the start-stop zone bit information, when the start-stop zone bit information is the effective start-stop signal mark, returning to execute the steps of generating a camera acquisition signal according to the rising edge information of the synchronous signal when the start-stop signal is detected, and acquiring image information according to the camera acquisition signal.
As an alternative embodiment of the present invention, the method further comprises:
firstly, generating timestamp information according to a month signal, a day signal, an hour signal, a minute signal, a microsecond signal and a nanosecond signal; in the present embodiment, the time stamp information is also time information.
Next, target image data is generated based on the time stamp information and the original image data. In the present embodiment, time stamp information is added to the raw image data acquired in the light sensing mode, and target image data with a time stamp is generated.
As shown in fig. 2, the following describes in detail an execution process of the synchronous acquisition method of the high-speed camera in combination with a signal timing chart, when starting of a target event is detected, a system generates a start-stop signal with a preset length, where the start-stop signal is active at a high level; and analyzing and generating a synchronous signal according to the received satellite time service signal and a preset decoding rule of an IRIG-B code, wherein the synchronous signal is a pulse signal with an effective rising edge. When a start-stop signal is detected, the pulse width of the synchronous signal is switched to 1us or 2us, and when the single-frame shooting is carried out, the pulse width is switched to 1 us; when the shooting is continuous, the pulse width is switched to 2 us. Setting the pulse width to 2us may be to avoid mutual interference between when image information is continuously captured.
Specifically, when the start-stop signal is detected, that is, in the case that the start-stop signal is valid, if the rising edge information of the synchronization signal is detected, at this time, an exposure signal of the camera, that is, a photosensitive module acting on the camera, is generated for acquiring image information of the target object. And reading the acquired image information according to the reading signal, and transmitting the image information to a corresponding storage medium to store the image information.
As shown in fig. 3, an implementation process of a synchronous acquisition method of a high-speed camera is described in detail in conjunction with an embodiment, and in particular, the synchronous acquisition method of the high-speed camera may be applied to the acquisition system of the high-speed camera shown in fig. 3. In this case, the time service synchronization box 21 may be a network time service device 600, and the 4-way high-speed camera 400 is synchronized by using the network time service device 600 as a time service source, and a system topology diagram is shown in fig. 3. Each high-speed camera 400 corresponds to one industrial personal computer 200. The 4 industrial personal computers 200 form a local area network through the network switch 100, wherein the path A is a master control industrial personal computer which can access other industrial personal computers and monitor other high-speed cameras through the network. The master control industrial personal computer can also control the network time service equipment 600 through the RS232, set synchronous pulse parameters, send start-stop signals, store signals and the like. The network time service device 600 is controlled by a master control industrial personal computer and sends a synchronous pulse signal to all the accessed high-speed cameras 400. The time target 500 is a photographed object and is used for verifying the accuracy of camera synchronization, that is, all cameras are synchronized when photographing at the same time. The high-speed flash lamp provides illumination for the shot object, and the illumination intensity can be adjusted manually or through an industrial personal computer. And after shooting by the high-speed camera, transmitting the high-speed image data through the optical fiber and storing the high-speed image data on a storage medium of a corresponding industrial personal computer. The storage medium may be a memory or a solid state disk.
As shown in fig. 4, an implementation process of the synchronous capturing method of the high-speed camera is described in detail with reference to an embodiment, and specifically, the synchronous capturing method of the high-speed camera may be applied to the high-speed camera capturing system shown in fig. 4. Taking the Beidou satellite as a time service source to synchronize 4-channel high-speed cameras as an example, at this time, the time service synchronization box 21 can be a BD/GPS antenna, that is, a satellite time service device 300, time service signals are acquired from the Beidou satellite, and each high-speed camera 400 corresponds to one industrial personal computer 200. The 4 industrial personal computers 200 form a local area network through the network switch 100, wherein the CH-A path is a master control industrial personal computer which can access other industrial personal computers and monitor other high-speed cameras through the network. The high-speed camera 400 may be provided therein with a synchronization signal generation module, and the camera may be provided with an aerial antenna, and may directly receive a satellite signal from a beidou satellite, that is, receive the satellite signal through a ray feeder, and convert the satellite signal into an IRIG-B code, thereby providing time information for a local camera for timing or synchronization of the camera. All cameras work under the synchronization of Beidou satellite signals. The time target 500 is a photographed object and is used for verifying the accuracy of camera synchronization, that is, all cameras are synchronized when photographing at the same time. The high-speed camera 400 is provided with a high-speed flash lamp to provide illumination for a shot object, and the illumination intensity can be adjusted manually or through an industrial personal computer. After the high-speed camera 400 finishes shooting, high-speed image data is transmitted through an image optical fiber and stored in a storage medium of the corresponding industrial personal computer 200. The storage medium is a memory or a solid state disk.
An embodiment of the present invention provides a synchronous acquisition device for a high-speed camera, as shown in fig. 5, including:
the time service synchronization box 21 is used for acquiring satellite time service signals; the antenna can be a BD/GPS antenna, directly transmits a Beidou radio frequency signal, and sends the Beidou radio frequency signal to the synchronization signal generation module 22 through radio frequency communication; the time service synchronization box can also be a network time service device, and the BD/GPS antenna is used for transmitting Beidou radio frequency signals, namely satellite time service signals; the network time service equipment can be a network time service box and is used for connecting a network time source, receiving satellite time service signals, can be TTL signals in an IRIG-B mode, and then sending time service signals to the high-speed camera through synchronous optical fibers. The detailed implementation can be referred to the related description of step S11 in the above method embodiment.
A synchronous signal generating module 22, configured to generate a synchronous signal by decoding according to the satellite time service signal; the detailed implementation can be referred to the related description of step S12 in the above method embodiment.
The camera acquisition signal generating module 23 is configured to generate a camera acquisition signal according to rising edge information of the synchronization signal when the start-stop signal is detected; the detailed implementation can be referred to the related description of step S13 in the above method embodiment.
And the photosensitive camera 24 is used for acquiring image information according to the camera acquisition signal. After the image data frame is collected by the photosensitive camera 24, the event number is automatically updated, and the updated time number is returned to the camera collecting signal generating module 23, that is, whether the start-stop flag bit is valid at this time. The detailed implementation can be referred to the related description of step S14 in the above method embodiment.
As an alternative embodiment of the present invention, the synchronization signal generating module 22, as shown in fig. 6, specifically includes:
the decoding submodule 221 is configured to analyze the satellite time signal and generate a month signal, a day signal, an hour signal, a minute signal, a second signal, and flag bit information; the detailed implementation can be referred to the related description of step S11 in the above method embodiment.
The frequency division submodule 222 is configured to perform frequency division processing on the second signal to generate a microsecond signal and a nanosecond signal; and generating a synchronous signal according to the microsecond signal, the nanosecond signal and the zone bit information. The detailed implementation can be referred to the related description of step S11 in the above method embodiment.
As an alternative embodiment of the present invention, as shown in fig. 5, the apparatus further includes:
the time recording module 25 is configured to generate timestamp information according to the month signal, the day signal, the hour signal, the minute signal, the microsecond signal, and the nanosecond signal; the detailed implementation can be referred to the related description of step S11 in the above method embodiment.
And a timestamp control module 26, configured to generate target image data according to the timestamp information and the original image data. The detailed implementation can be referred to the related description of step S11 in the above method embodiment.
The embodiment of the invention also provides a synchronous acquisition system of the high-speed camera, which comprises: and the high-speed cameras are used for acquiring image information according to the camera acquisition signals.
At least one processor 31; and a memory 32 communicatively coupled to the at least one processor; wherein the processor 31 and the memory 32 may be connected by a bus or other means, and fig. 7 illustrates the connection by a bus as an example.
The processor 31 may be a Central Processing Unit (CPU). The Processor 31 may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or combinations thereof.
The memory 32 is a non-transitory computer readable storage medium, and can be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as program instructions/modules corresponding to the synchronous acquisition method of the high-speed camera in the embodiment of the present invention (for example, the time service synchronization box 21, the synchronization signal generation module 22, the camera acquisition signal generation module 23, and the light sensing camera 24 shown in fig. 5). The processor 31 executes various functional applications and data processing of the processor by running non-transitory software programs, instructions and modules stored in the memory 32, that is, implements the synchronous acquisition method of the high-speed camera in the above method embodiment.
The memory 32 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 31, and the like. Further, the memory 32 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 32 may optionally include memory located remotely from the processor 31, and these remote memories may be connected to the processor 31 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 32 and when executed by the processor 31 perform the synchronous acquisition method of the high speed camera as in the embodiment shown in fig. 1.
The details of the computer device can be understood with reference to the corresponding related descriptions and effects in the embodiment shown in fig. 1, and are not described herein again.
Optionally, an embodiment of the present invention further provides a non-transitory computer readable medium, where the non-transitory computer readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the synchronous acquisition method of a high-speed camera as described in any of the above embodiments, where the storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD), or a Solid-State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (11)
1. A synchronous acquisition method of a high-speed camera is characterized by comprising the following steps:
acquiring a satellite time service signal, and decoding the satellite time service signal to generate a synchronous signal;
when a start-stop signal is detected, generating a camera acquisition signal according to the rising edge information of the synchronous signal;
and acquiring image information according to the camera acquisition signal.
2. The method according to claim 1, wherein the decoding to generate the synchronization signal according to the satellite timing signal specifically comprises:
analyzing the satellite time service signal to generate a month signal, a day signal, an hour signal, a minute signal, a second signal and zone bit information;
carrying out frequency division processing on the second signal to generate a microsecond signal and a nanosecond signal;
and generating the synchronous signal according to the microsecond signal, the nanosecond signal and the zone bit information.
3. The method of claim 2, further comprising, after the step of acquiring image information:
clearing the received satellite time service signal;
acquiring shooting information of the high-speed camera, wherein the shooting information comprises shooting mode information and shooting number information;
and determining the start-stop zone bit information according to the shooting mode information and the shooting number information, and adding the start-stop zone bit information into the image information to generate original image data.
4. The method of claim 3, wherein the start-stop flag bit information comprises a start-stop signal valid flag and a start-stop signal invalid flag.
5. The method of claim 4, further comprising, after the step of generating raw image data:
and detecting the start-stop flag bit information, and when the start-stop flag bit information is a valid start-stop signal flag, returning to execute the step of generating a camera acquisition signal according to the rising edge information of the synchronous signal when the start-stop signal is detected, to the step of acquiring image information according to the camera acquisition signal.
6. The method of claim 5, further comprising:
generating timestamp information according to the month signal, the day signal, the hour signal, the minute signal, the microsecond signal and the nanosecond signal;
and generating target image data according to the timestamp information and the original image data.
7. A synchronous acquisition device of a high-speed camera is characterized by comprising:
the time service synchronization box is used for acquiring satellite time service signals;
the synchronous signal generating module is used for decoding and generating a synchronous signal according to the satellite time service signal;
the camera acquisition signal generation module is used for generating a camera acquisition signal according to the rising edge information of the synchronous signal when the start-stop signal is detected;
and the photosensitive camera is used for acquiring image information according to the camera acquisition signal.
8. The apparatus according to claim 7, wherein the synchronization signal generating module specifically includes:
the decoding submodule is used for analyzing the satellite time service signal and generating a month signal, a day signal, an hour signal, a minute signal, a second signal and zone bit information;
the frequency division submodule is used for carrying out frequency division processing on the second signal to generate a microsecond signal and a nanosecond signal; and generating the synchronous signal according to the microsecond signal, the nanosecond signal and the zone bit information.
9. The apparatus of claim 8, further comprising:
the time recording module is used for generating timestamp information according to the month signal, the day signal, the hour signal, the minute signal, the microsecond signal and the nanosecond signal;
and the time stamp control module is used for generating target image data according to the time stamp information and the original image data.
10. A synchronous acquisition system for a high speed camera, comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the one processor to cause the at least one processor to perform the steps of the method of synchronized acquisition of a high speed camera of any one of claims 1-6;
the high-speed cameras are used for acquiring image information according to the camera acquisition signals.
11. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for synchronized acquisition of a high-speed camera according to any one of claims 1 to 6.
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