CN111163243A - Shutter control circuit for bullet time shooting - Google Patents
Shutter control circuit for bullet time shooting Download PDFInfo
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- CN111163243A CN111163243A CN202010070555.9A CN202010070555A CN111163243A CN 111163243 A CN111163243 A CN 111163243A CN 202010070555 A CN202010070555 A CN 202010070555A CN 111163243 A CN111163243 A CN 111163243A
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/50—Control of the SSIS exposure
- H04N25/53—Control of the integration time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/70—SSIS architectures; Circuits associated therewith
- H04N25/76—Addressed sensors, e.g. MOS or CMOS sensors
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Abstract
本发明公开了一种用于子弹时间拍摄的快门控制电路，属于相机快门控制领域，包括输入端子JP1、单片机K、锁存器、接线端子K1‑K100、输出端子J101，所述单片机包括主控芯片，所述主控芯片外接有无源晶振和复位按键，还包括有开关电源芯片U27，可以实现。本发明的用于子弹时间拍摄的快门控制电路，采用单片机加多个8位锁存器，两个锁存器为一组，前级锁存器主要放数据以实现数据预锁，后级锁存器主要实现特定的时候同步释放数据以实现完全同步，实现了单片机跨组IO完全同步。
The invention discloses a shutter control circuit for shooting bullet time, belonging to the field of camera shutter control. The main control chip is connected with a passive crystal oscillator and a reset button, and also includes a switching power supply chip U27, which can be realized. The shutter control circuit for shooting bullet time of the present invention adopts a single-chip microcomputer plus a plurality of 8-bit latches, and two latches are a group. The memory mainly realizes the synchronous release of data at a specific time to achieve complete synchronization, and realizes the complete synchronization of IO across groups of single-chip microcomputers.
Description
Technical Field
The invention relates to the technical field of camera shutter control, in particular to a shutter control circuit for bullet time shooting.
Background
Bullet time is a photographic technique used in movies, television commercials, or computer games to simulate variable speed effects such as intensified slow-shots, time-stationary effects, etc. The "bullet time" effect is due to the fact that the famous and loud noises are largely used in the movie "hacker empire" produced by the movie company hollywood wara brother. Among them, the slow-motion lens of man's chief angle Neo facing upward to hide bullets is classically known, and the "bullet time" is named accordingly. The technology is widely applied to the fields of movies, advertisements, creative activities and the like.
Bullet time was initially achieved with a series of still cameras (rather than video cameras) surrounding the object. These camera arrays are typically triggered either simultaneously or sequentially by shutters. Combining each picture taken by each camera can create a view rotation effect, or super-slow-lens effect, on a stationary object. It is difficult to satisfy simultaneous or partially simultaneous in sequence if a single MCU (micro control unit) control is involved.
The existing bullet time shooting shutter controller is generally directly controlled by a single chip microcomputer and an MOS (metal oxide semiconductor), the control effect is directly related to the processing speed of the single chip microcomputer, and the single chip microcomputer cannot realize complete synchronization of cross-group IO.
Disclosure of Invention
1. Technical problem to be solved
The invention aims to provide a shutter control circuit for bullet time shooting, which adopts a singlechip and a plurality of 8-bit latches, wherein two latches form a group, the front-stage latch mainly releases data to realize data pre-locking, and the rear-stage latch mainly releases data synchronously at specific time to realize complete synchronization, so that complete synchronization of cross-group IO of the singlechip is realized.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A shutter control circuit for bullet time shooting comprises an input terminal JP1, a single chip microcomputer, a plurality of groups of latches, a wiring terminal K1-K100 and an output terminal J101, wherein the single chip microcomputer comprises a main control chip, the main control chip is externally connected with a passive crystal oscillator and a reset key, and the shutter control circuit further comprises a switch power supply chip U27.
Further, the input terminal JP1 is externally connected with a dc voltage of 5-25V, preferably a 12V supply voltage for system stability, and the input terminal JP1 is further connected with an input filter capacitor C9, and the input filter capacitor C9 is used for ensuring the stability of the input power supply.
Further, the main control chip adopts a STM32RBT6 model chip.
Further, the network numbers EN1-EN14 on the master control pin of the master control chip are used for controlling the enabling end of the latch, and I1-I8 are used for giving 8-bit parallel data to the latch.
Further, each set of latches comprises preceding latches D1-D8 and following latches Q1-Q8, the preceding latches mainly discharge data for realizing data pre-locking, and the following latches mainly synchronously discharge data at a specific time to realize full-synchronization.
Further, the terminals K1-K100 are used for connecting with cameras, and the network labels K1-K100 corresponding to the 100 terminals K1-K100 are shutter control signals of 100 cameras.
Further, the com end of the connection terminal K1-K100 is connected with a focusing signal of the camera, the com end of the input terminal J101 is connected with a focusing input signal of the shutter controller, the com end of the connection terminal K1-K100 is a common end, and the com end of the connection terminal K1-K100 is shared with the com end of the output terminal J101.
Further, the switching power supply chip U27 adopts a buck structure, adopts an internal integrated mos tube, and is used for providing current output of about 3A, the output end of the switching power supply chip U27 is further connected with an output filter capacitor C10, the two ends of the output filter capacitor C10 obtain 3.3V voltage through the processing of the switching power supply chip U27, and the rear C11-C36 is an output high-frequency filter, and is used for being connected near the power supply of each chip and used for suppressing high-frequency interference.
Furthermore, the circuit system of the shutter control circuit comprises a focusing signal receiving circuit, a shutter signal receiving circuit, a camera focusing and shutter control circuit and a serial port timing delay time setting circuit;
the focusing signal receiving circuit is used for receiving a focusing signal to wake up the camera;
the shutter signal receiving circuit is used for receiving a shutter signal, locking focusing and rapidly and synchronously triggering a shutter according to set time and releasing the shutter;
the camera focusing and shutter control circuit is used for receiving a trigger signal by the singlechip to control the latch, controlling mos from pre-latch to release signal and realizing the focusing of the camera and the control of the shutter;
the serial port implementation timing delay time setting circuit is used for the singlechip to interactively communicate data with a computer through a serial port ttl signal and store the data in an internal flash.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
the existing bullet time shooting shutter controller is generally directly controlled by a single chip microcomputer and an MOS (metal oxide semiconductor), the control effect is directly related to the processing speed of the single chip microcomputer, and the single chip microcomputer cannot realize complete synchronization of cross-group IO. The invention aims to solve the problems of quick control and complete synchronization.
The shutter control circuit for bullet time shooting adopts a single chip microcomputer and a plurality of 8-bit latches, the two latches form a group, the front-stage latch mainly releases data to realize data pre-locking, and the rear-stage latch mainly synchronously releases data at a specific time to realize complete synchronization, so that the complete synchronization of cross-group IO of the single chip microcomputer is realized, and the complete synchronization of cross-group IO of the single chip microcomputer is realized.
Drawings
FIG. 1 is a circuit diagram of a single chip microcomputer according to the present invention;
FIG. 2 is a circuit diagram of the single-chip microcomputer 101 of the present invention;
FIG. 3 is a circuit diagram of a latch according to the present invention;
FIG. 4 is a circuit diagram of terminal K1-K100 of the present invention;
fig. 5 is a circuit diagram of a power supply chip in the present invention.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1-5, a shutter control circuit for bullet time shooting, wherein JP1 is an input terminal, which can be externally connected with a dc voltage of 5-25V, a 12V power supply voltage is generally selected for system stability, C9 is an input filter capacitor to ensure the stability of an input power supply, the following U27 is a switching power supply chip produced by semiconductor corporation in the united states, but this company is currently purchased by texas instruments, this chip adopts a buck structure, and a mos tube is integrated inside, which can provide a current output of about 3A, and the processing of U27 makes the two ends of the capacitor C10 obtain a voltage of 3.3V, while C10 is used as an output filter, the following C11-C36 is an output high frequency filter, which is used to be connected near the power supply of each chip to suppress high frequency interference; STM1 is a master control chip, STM32RBT6 of semiconductor of meaning used in the master control, the master control chip is externally connected with an 8M passive crystal oscillator and a key for resetting, the minimum system circuit of the singlechip is formed, the network number on the master control pin is EN1-EN14 for controlling the enable end of the latch, I1-I8 for 8-bit parallel data to the latch, the connection terminal K1-K100 for connecting the camera, 100 Canon single lens reflex cameras in total, the network reference number K1-K100 corresponding to the 100 terminals K1-K100 is the shutter control signal of 100 cameras, the COM terminals of the 100 terminals are common, and is shared with the com terminal of the output terminal J101, which is connected to the focus signal of the camera, the com end of the just mentioned input terminal J101 is connected with a focusing input signal of the shutter controller, namely the focusing of the shutter controller directly controls the camera;
the focusing signal is directly connected to a focusing trigger port of the camera, the focusing of the camera is directly triggered by the focusing signal, once a shutter signal is pressed, the singlechip K101 detects a low level, the locking focusing starts to execute a first step of triggering, the trigger port EN14 is directly released, an actual circuit needs to trigger signal data displayed before triggering to be displayed in Q1-Q8 of U1, after triggering, the signal data is released to be immediately latched after enabling LE (network EN14) of U2, the LE is an output end state change enabling end, when the LE is at the low level, the output end Q always keeps a last stored signal (input from a D end), when the LE is at the high level, the Q immediately follows the state change of the D, and the state of the D is latched. And when the LE is latched, the next group of data is directly filled, and the latch is released again when the set time is up until the complete triggering is finished. And the UART _ TX and UART _ RX of the singlechip are communicated with the computer end through serial ports to carry out timing delay data.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (9)
1. A shutter control circuit for bullet time shooting comprises an input terminal JP1, a single chip microcomputer, a plurality of groups of latches, a wiring terminal K1-K100 and an output terminal J101, wherein the single chip microcomputer comprises a main control chip, the main control chip is externally connected with a passive crystal oscillator and a reset key, and the shutter control circuit further comprises a switch power supply chip U27.
2. A shutter control circuit for bullet time shooting according to claim 1, characterized in that: the input terminal JP1 is externally connected with a direct current voltage of 5-25V, and is preferably a 12V power supply voltage for the stability of the system, the input terminal JP1 is further connected with an input filter capacitor C9, and the input filter capacitor C9 is used for ensuring the stability of an input power supply.
3. A shutter control circuit for bullet time shooting according to claim 1, characterized in that: and the master control chip stml adopts a chip of STM32RBT6 model.
4. A shutter control circuit for bullet time shooting according to claim 1, characterized in that: the network labels on the master control pins of the master control chip are EN1-EN14, which are used for controlling the enabling ends of the latches, and I1-I8 are used for giving 8-bit parallel data to the latches.
5. A shutter control circuit for bullet time shooting according to claim 1, characterized in that: each set of latches comprises preceding latches D1-D8 and succeeding latches Q1-Q8, the preceding latches mainly releasing data for realizing data pre-locking, and the succeeding latches mainly releasing data synchronously at a specific time for realizing complete synchronization.
6. A shutter control circuit for bullet time shooting according to claim 1, characterized in that: the connecting terminals K1-K100 are used for being connected with cameras, and network labels K1-K100 corresponding to 100 connecting terminals K1-K100 are shutter control signals of 100 cameras.
7. A shutter control circuit for bullet time shooting according to claim 1, characterized in that: the com end of the connecting terminal K1-K100 is connected with a focusing signal of a camera, the com end of the input terminal J101 is connected with a focusing input signal of a shutter controller, the com end of the connecting terminal K1-K100 is a common end, and the com end of the connecting terminal K1-K100 is shared with the com end of the output terminal J101.
8. A shutter control circuit for bullet time shooting according to claim 1, characterized in that: the switching power supply chip U27 adopts a buck structure, adopts an internal integrated mos tube and is used for providing current output of about 3A, the output end of the switching power supply chip U27 is also connected with an output filter capacitor C10, the two ends of the output filter capacitor C10 are enabled to obtain 3.3V voltage through the processing of the switching power supply chip U27, and the rear C11-C36 is output high-frequency filter and is used for being connected near the power supply of each chip and used for inhibiting high-frequency interference.
9. A shutter control circuit for bullet time shooting according to claim 1, characterized in that: the circuit system of the shutter control circuit comprises a focusing signal receiving circuit, a shutter signal receiving circuit, a camera focusing and shutter control circuit and a serial port time delay setting circuit;
the focusing signal receiving circuit is used for receiving a focusing signal to wake up the camera;
the shutter signal receiving circuit is used for receiving a shutter signal, locking focusing and rapidly and synchronously triggering a shutter according to set time and releasing the shutter;
the camera focusing and shutter control circuit is used for receiving a trigger signal by the singlechip to control the latch, controlling mos from pre-latch to release signal and realizing the focusing of the camera and the control of the shutter;
the serial port implementation timing delay time setting circuit is used for the singlechip to interactively communicate data with a computer through a serial port ttl signal and store the data in an internal flash.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010070555.9A CN111163243B (en) | 2020-01-21 | 2020-01-21 | A shutter control circuit for bullet time shooting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010070555.9A CN111163243B (en) | 2020-01-21 | 2020-01-21 | A shutter control circuit for bullet time shooting |
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| CN111163243A true CN111163243A (en) | 2020-05-15 |
| CN111163243B CN111163243B (en) | 2025-07-15 |
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| CN202010070555.9A Active CN111163243B (en) | 2020-01-21 | 2020-01-21 | A shutter control circuit for bullet time shooting |
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Citations (9)
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| US20030030472A1 (en) * | 2001-08-10 | 2003-02-13 | Mitsubishi Denki Kabushiki Kaisha | Synchronous signal transfer and processing device |
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| JP2017081089A (en) * | 2015-10-30 | 2017-05-18 | 株式会社リコー | Synchronizer |
| CN107770411A (en) * | 2016-08-21 | 2018-03-06 | 胡松华 | A kind of view data strange land gathers synchronous circuit |
| CN211606595U (en) * | 2020-01-21 | 2020-09-29 | 苏州易泰勒电子科技有限公司 | Shutter control circuit for bullet time shooting |
-
2020
- 2020-01-21 CN CN202010070555.9A patent/CN111163243B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030030472A1 (en) * | 2001-08-10 | 2003-02-13 | Mitsubishi Denki Kabushiki Kaisha | Synchronous signal transfer and processing device |
| CN1689228A (en) * | 2002-10-07 | 2005-10-26 | 皇家飞利浦电子股份有限公司 | Television system with controlled tuning |
| JP2005317278A (en) * | 2004-04-27 | 2005-11-10 | Canon Inc | Strobe device |
| US20100265374A1 (en) * | 2009-04-17 | 2010-10-21 | Sony Corporation | A/D converter, solid-state imaging device and camera system |
| CN201508409U (en) * | 2009-10-10 | 2010-06-16 | 佛山市柏克电力设备有限公司 | An intelligent battery inspection instrument |
| CN104601978A (en) * | 2015-01-06 | 2015-05-06 | 北京中科广视科技有限公司 | Acquisition system and method of free viewpoint image |
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