CN114442553A - Multi-device real-time synchronous shooting system - Google Patents
Multi-device real-time synchronous shooting system Download PDFInfo
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- CN114442553A CN114442553A CN202210120829.XA CN202210120829A CN114442553A CN 114442553 A CN114442553 A CN 114442553A CN 202210120829 A CN202210120829 A CN 202210120829A CN 114442553 A CN114442553 A CN 114442553A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/056—Programming the PLC
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/13—Plc programming
- G05B2219/13004—Programming the plc
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Programmable Controllers (AREA)
Abstract
The invention provides a multi-equipment real-time synchronous shooting system, which relates to the technical field of film production and comprises the following steps: the LED screen, the automation equipment and the LED screen are in communication connection with the time code device, so that the equipment executes corresponding actions according to time code signals, and the technical problem that a series of automation equipment such as a pan-tilt, a swing table and a rotary table and the like and an LED screen picture cannot be synchronously controlled in real time in the prior art is solved. Compared with the prior art, the control to each frame can be realized accurately, and the effect of the video shot by the multi-equipment real-time synchronous shooting system is consistent with the effect of previewz animation previewing, so that a large amount of labor and time are saved.
Description
Technical Field
The invention relates to the technical field of film production, in particular to a multi-device real-time synchronous shooting system.
Background
In the movie-related industry, the term Previz generally refers to a technology for visually presenting some or all shots in a movie before the movie is formally shot, and the technology can help the whole team to have an overall cognition on the content of a scenario, and the occurrence of animation previewing can save the production time of the movie and reduce the production cost.
When actual shooting is carried out, a programmable logic controller PLC is generally adopted to control a series of automatic equipment such as a robot, a holder, a placing table, a rotating table and the like to start shooting according to a certain time sequence through delay time.
However, in a virtual film-making shooting scene in which a 3D virtual scene needs to be projected to an LED screen and the LED screen is shot to form a final picture, on one hand, a shooting person needs to adjust a shooting effect by changing a delay time of a Programmable Logic Controller (PLC) for each device, and on the other hand, the LED screen picture needs to be controlled, so that real-time synchronous control of a series of automatic devices such as a pan/tilt, a set table, a rotary table and the like and the LED screen picture cannot be achieved, and therefore, a shot video cannot be consistent with a preview effect, a desired effect can be achieved by multiple adjustments, and a large amount of manpower and time are wasted by continuously and repeatedly shooting.
Disclosure of Invention
The invention aims to solve the problem that the position and the shooting time of a camera cannot be accurately controlled by manually controlling the camera in the background technology, and provides a multi-device real-time synchronous shooting system.
In order to achieve the above object, the present invention provides a multi-device real-time synchronous shooting system, comprising: a time code device configured to output a time code signal; a Programmable Logic Controller (PLC) configured to receive the time code signals and transmit corresponding control signals in a set order; an automation device configured to receive a control signal and perform corresponding actions, the actions including start, pause; an LED screen configured to receive a time code signal.
Optionally, the programmable logic controller PLC sequentially performs input sampling, program execution, and output refreshing to receive the time code signal and send the corresponding control signal in a set sequence.
Optionally, in the input sampling stage, the programmable logic controller PLC is configured to temporarily store the time code signals in the input mapping register, sequentially read in all the time code signals in a scanning manner, write the time code signals in the corresponding input status register, and finally close the input port.
Optionally, in the program execution stage, the programmable logic controller PLC is configured to scan and execute each instruction according to the storage sequence of the user instruction, and write the result into the output status register after the corresponding operation processing.
Optionally, in the output refresh phase, the programmable logic controller PLC is configured to send the on/off state of the output status register to the output latch to generate a corresponding control signal.
Optionally, the time code device establishes a communication connection with the PLC through a UDP protocol to transmit the time code signal.
Optionally, the time code signal includes a duration value, a score value, a second value, and a frame value.
The invention has the beneficial effects that:
the multi-device real-time synchronous shooting system of the embodiment of the invention comprises: the system comprises a time code device, a Programmable Logic Controller (PLC), automation equipment and an LED screen, wherein the LED screen, the automation equipment and the time code device are in communication connection to enable each equipment to execute corresponding actions according to time code signals, so that the technical problem that a series of automation equipment such as a cloud deck, a swing deck, a rotary table and the like and an LED screen picture cannot be synchronously controlled in real time in the prior art is solved. Compared with the prior art, the method and the device can realize accurate control to each frame, and the effect of the video shot by the multi-device real-time synchronous shooting system provided by the embodiment of the invention is consistent with the effect of previewz animation previewing, so that a large amount of labor and time are saved.
The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a system framework of a multi-device real-time synchronous shooting system according to an embodiment of the present invention;
fig. 2 is a ladder diagram of a PLC in a multi-device real-time synchronous shooting system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to specific examples in order to facilitate understanding by those skilled in the art.
Fig. 1 schematically shows a system framework diagram of a multi-device real-time synchronous shooting system according to an embodiment of the present invention.
Referring to fig. 1, a multi-device real-time synchronous shooting system includes:
a time code device S110 configured to output a time code signal;
a programmable logic controller S120 configured to receive the time code signals and to transmit corresponding control signals in a set order;
an automation device S130 configured to receive the control signal and perform a corresponding action, the action including start, pause, stop, motion;
an LED screen (not shown in fig. 1) is connected to the time code device via a data line to receive the time code signal.
In the multi-equipment real-time synchronous shooting system provided by the embodiment of the invention, the LED screen, the automation equipment and the time code device are in communication connection to enable each equipment to execute corresponding actions according to time code signals, so that the technical problem that a series of automation equipment such as a cradle head, a placing table and a rotating table and LED screen pictures cannot be synchronously controlled in real time in the prior art is solved. Compared with the prior art, the method can realize accurate control to each frame.
Hereinafter, a multi-device real-time synchronous shooting system according to an embodiment of the present invention will be described in more detail with reference to the accompanying drawings and embodiments.
In one embodiment, the time code device transmits the time code signal by establishing a communication connection with the Programmable Logic Controller (PLC) through a UDP protocol. The time code signal which changes constantly is transmitted through the UDP protocol, and the method has the advantages of high transmission real-time performance and high transmission speed. While other protocols such as TCP are used for transmission, handshake determination is required before data transmission, which affects the real-time performance of the transmission time code signal.
The programmable logic controller PLC consists of a central processing unit, a memory, an input/output (I/O), a power supply and an external equipment programmer.
The programmable logic controller PLC works in a mode of 'sequential scanning and continuous circulation'. When the program is running, the CPU will make periodic loop scan according to the step number (or address number) of the instruction according to the program programmed by the user and stored in the user memory, if there is no jump instruction, the user program is executed from the first instruction one by one until the program is finished. Then return to the first designation again and start the next new scan round. During each scanning process, the refreshing of the input signal and the output state is also completed.
In one embodiment, the programmable logic controller PLC sequentially performs input sampling, program execution, and output refresh, and the three stages are used to receive the time code signal and send the corresponding control signals in a set sequence.
In the input sampling stage, the programmable logic controller PLC temporarily stores the time code signals in an input mapping register, reads all the time code signals in sequence in a scanning mode, writes the time code signals into a corresponding input state register, closes an input port and enters a program execution stage.
In the program execution stage, the programmable logic controller PLC scans and executes each instruction according to the storage sequence of the user instruction, and writes the result into the output status register after corresponding operation processing, wherein all the contents in the output status register are changed along with the execution of the program.
In the output refreshing stage, the programmable logic controller PLC sends the on-off state of the output state register to the output latch so as to generate a corresponding control signal, and the corresponding control signal is output through a certain mode (a relay, a transistor or a thyristor) to drive corresponding output equipment to work.
Fig. 2 is a ladder diagram of a PLC in a multi-device real-time synchronous shooting system according to an embodiment of the present invention.
Referring to fig. 2, step S410 is initialization, and after the initialization is completed, a section of the process of step S420 is a reset process for performing power-on reset.
After step S410 and step S420, a second procedure is started, where the second procedure is a UDP communication procedure. Step S430 is used to power on the UDP communication.
Step S440 is a normally closed state of UDP communication, i.e., a data transmission state. After the UDP communication is completed in the normally closed state, the time code signal and the programmable logic controller PLC are initialized in step S450, and after the initialization is completed, the UDP communication is connected.
In step S460, Con indicates the ip address of the connection, Loc indicates the port number, and in step S460, there is a Done-corresponding v6020.0 indicating a different connection status indicating that the connection is successful; busy-corresponding V6020.1 indicates a Busy case when it is a connection, no connection, but a connection is attempted; Err-V6020.2 indicates that when connection is made, no connection is made, indicating connection error information; Sta-VB 6022 indicates the gesture that is beginning a connection.
When the multi-equipment real-time synchronous shooting system provided by the embodiment of the invention is adopted for virtual shooting, the time code device outputs time code signals, and the Programmable Logic Controller (PLC) and the LED screen receive the time code signals. The programmable logic controller PLC carries out the steps of input sampling, program execution and output refreshing in sequence to generate corresponding control signals, and controls all the automatic equipment to carry out corresponding motion states of starting, pausing and the like.
By the multi-equipment real-time synchronous shooting system, real-time synchronization of time axes of automation equipment such as an LED screen, a Programmable Logic Controller (PLC), a robot, a holder, a swinging table and a turntable is realized. Therefore, the technical problem that real-time synchronous control of a series of automation equipment such as a cloud deck, a placing table and a rotary table and an LED screen picture cannot be achieved in the prior art is solved. Compared with the prior art, the method and the device can realize accurate control to each frame, and the effect of the video shot by the multi-device real-time synchronous shooting system provided by the embodiment of the invention is consistent with the effect of previewz animation previewing, so that a large amount of labor and time are saved.
The technical features of the embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and all technical solutions that belong to the idea of the present invention belong to the scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. The utility model provides a real-time synchronization shooting system of many equipment which characterized in that includes: a time code device configured to output a time code signal; a Programmable Logic Controller (PLC) configured to receive the time code signals and transmit corresponding control signals in a set order; an automation device configured to receive a control signal and perform corresponding actions, the actions including start, pause; an LED screen configured to receive a time code signal.
2. The multi-device real-time synchronous shooting system of claim 1, wherein the Programmable Logic Controller (PLC) receives the time code signals and sends corresponding control signals in a set sequence by sequentially performing input sampling, program execution and output refreshing.
3. The multi-device real-time synchronous shooting system of claim 2, wherein in the input sampling stage, the Programmable Logic Controller (PLC) is configured to temporarily store the time code signals in the input mapping register, sequentially read all the time code signals in a scanning manner, write the time code signals in the corresponding input status register, and finally close the input port.
4. The multi-device real-time synchronous shooting system according to claim 2, wherein in the program execution stage, the Programmable Logic Controller (PLC) is configured to scan and execute each instruction according to the storage sequence of the user instructions, and write the result into the output status register after the corresponding operation processing.
5. The multi-device real-time synchronous shooting system according to claim 2, wherein in the output refreshing stage, the Programmable Logic Controller (PLC) is configured to send the on-off state of the output state register to the output latch to generate a corresponding control signal.
6. The multi-device real-time synchronous shooting system of claim 1, wherein the time code device transmits the time code signal by establishing a communication connection with the Programmable Logic Controller (PLC) through a UDP protocol.
7. The multi-device real-time synchronous shooting system according to claim 1, wherein the automation device comprises a robot, a pan-tilt head, a swing table, a rotary table and a camera.
8. The multi-device real-time synchronous shooting system according to claim 1, wherein the time code signal comprises a duration value, a score value, a second value and a frame value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210120829.XA CN114442553A (en) | 2022-02-09 | 2022-02-09 | Multi-device real-time synchronous shooting system |
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| CN202210120829.XA CN114442553A (en) | 2022-02-09 | 2022-02-09 | Multi-device real-time synchronous shooting system |
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