CN104079831B - A kind of camera with multichannel flash synchronization signal - Google Patents
A kind of camera with multichannel flash synchronization signal Download PDFInfo
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- CN104079831B CN104079831B CN201410307842.1A CN201410307842A CN104079831B CN 104079831 B CN104079831 B CN 104079831B CN 201410307842 A CN201410307842 A CN 201410307842A CN 104079831 B CN104079831 B CN 104079831B
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Abstract
The invention discloses a kind of camera with multichannel flash synchronization signal, camera body and camera interface including connection, wherein, the camera interface includes synchronizing signal generation module, input module and power module, power module provides power supply for synchronizing signal generation module, input module, synchronizing signal generation module receives the pulse flash synchronizing signal of image sensor chip, the input information received according to input module, Multi-path synchronous signal of the generation with different effective orders, the open and close of the outside multiple flash lamps of control；User can be integrated in camera internal according to the execution sequence of the self-defined multichannel flash lamp of actual conditions, function, using when do not account for additional space.
Description
Technical field
The present invention relates to a kind of camera with multichannel flash synchronization signal.
Background technology
For the existing camera for industries such as industry, traffic, medical treatment, scientific research, business, family expenses of in the market, bag
Smart camera is included, flash synchronization output signal is usually constructed with, this signal is used for the flash lamp for controlling outside, makes flash lamp and phase
Machine is synchronous, i.e., flash lamp is just opened when needing camera image sensor chip to be integrated or camera is taken pictures.Have
This signal, flash lamp may not necessarily Chang Liang, so as to both reduce power consumption, the strong light that can also reduce flash lamp is done to human eye
Disturb.
But existing industrial camera only one of which flash synchronization signal, it has the disadvantage that one or one group of flash of light can only be controlled
Lamp or light source.And in the practical application of industrial camera/smart camera, it may appear that need the multiple flash lamp/light of Time-sharing control
The situation in source.For example, needed when Current camera is taken pictures open flash lamp A, needed when taking pictures next time open flash lamp B, then under
Once need to open flash lamp A again, so repeatedly.In this case, a flash synchronization signal can not just meet this need
Ask.
For example, it is necessary to which surface and profile to cylindrical component will carry out vision-based detection in industrial automation detection.
For surface defects detection, light source needs to be irradiated from the front of part, i.e., camera and light source are in the same side of part；For
Contour detecting, light source needs to be irradiated from the back side of part, i.e. not homonymy (the i.e. backlight skill of camera and light source in part
Art).They can interfere with each other if two light sources are opened simultaneously.Due to that will be detected to all angles of part, often
Method is part is rotated automatically, and part often rotates an angle (such as 30 degree), respectively with front light source and backlight
Carry out polishing, take pictures.If camera only has flash synchronization output all the way, the control of light source can only be from outside equipment (such as
PLC alternately control) is carried out to two light sources.The shortcoming of this method is poor real, cost height, system debug inconvenience.Such as
Fruit camera inherently possesses the flash synchronization signal that two-way can be exported with timesharing, then avoiding the need for outside unnecessary equipment can
To realize that two-way light source is controlled respectively, it highly shortened the working time of system, improve the operating efficiency of system, and be
Cost of uniting is low, debugging is convenient.
The content of the invention
The present invention is in order to solve the above problems, it is proposed that a kind of camera with multichannel flash synchronization signal, the present apparatus is adopted
The control of multichannel flash lamp is realized with multichannel flash synchronization signal；Multichannel flash synchronization signal can be according to user's simultaneously
The self-defined order that it is performed of actual demand.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of camera with multichannel flash synchronization signal, includes the camera body and camera interface of connection, wherein, it is described
Camera interface includes synchronizing signal generation module, input module and power module, and power module is synchronizing signal generation module, defeated
Enter module and power supply is provided, synchronizing signal generation module receives the pulse flash synchronizing signal of camera image sensor chip, according to
What input module was received includes preassigning the input information of set and reset signal, multichannel of the generation with different effective orders
Synchronizing signal, the open and close of the outside multiple flash lamps of control；The pulse flash synchronizing signal be chip export high level or
Low level pulse signal, its valid interval is consistent with the effective exposure time of chip.
The synchronizing signal generation module, including trigger, decoder and the gate circuit being sequentially connected, trigger receive figure
As the pulse flash synchronizing signal of sensor chip, by the logical transition of decoder and gate circuit, multichannel flash synchronization is formed
Signal.
The synchronizing signal generation module, including counter and controller, counter connection controller, counter receive arteries and veins
Flash synchronization signal is rushed, by the analysis of controller, processing, output multi-channel flash synchronization signal.
The controller includes but is not limited to single-chip microcomputer, ARM and DSP Processor.
The synchronizing signal generation module, including counter and comparison circuit, counter connection comparison circuit, counter connect
Pulse flash synchronizing signal is received, by the conversion of comparison circuit, processing, output multi-channel flash synchronization signal.
The comparison circuit includes but is not limited to CPLD, FPGA and discrete circuit.
The synchronizing signal generation module receives set signal, reset signal or clock signal.
The Multi-path synchronous signal of the different effective orders is effective time window and the completely the same letter of exposure sensor
Number.
The Multi-path synchronous signal of the different effective orders is the signal that effective time window is shorter than sensor exposure time.
The Multi-path synchronous signal of the different effective orders is the signal that effective time window is longer than sensor exposure time.
The effective time window must have overlapping part in time with exposure sensor.
Beneficial effects of the present invention are：
(1) Time-sharing control of multichannel flash lamp/light source can be realized；
(2) user can be according to the execution sequence of the self-defined multichannel flash lamp of actual conditions；
(3) function is integrated in camera internal, using when do not account for additional space, install simple, it is easy to apply.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is camera synchronizing signal interface diagram of the invention；
Fig. 3 is flash synchronization signal generation schematic diagram of the invention；
Fig. 4 is flash synchronization signal flow graph of the invention；
Fig. 5 is the schematic diagram of camera synchronizing signal sequential illustrated example one of the invention；
Fig. 6 is the schematic diagram of camera synchronizing signal sequential illustrated example two of the invention；
Fig. 7 is the schematic diagram of camera synchronizing signal sequential illustrated example three of the invention；
Fig. 8 is the schematic diagram of camera synchronizing signal sequential illustrated example one of the invention；
Fig. 9 is the structural circuit figure of synchronizing signal generation module embodiment one of the present invention；
Figure 10 is the structural circuit figure of synchronizing signal generation module embodiment two of the present invention；
Figure 11 is the structural circuit figure of synchronizing signal generation module embodiment three of the present invention；
Figure 12 is Application Example schematic diagram of the present invention；
Figure 13 is the front light source design sketch of Application Example of the present invention；
Figure 14 is the back side light source design sketch of Application Example of the present invention.
Embodiment：
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of camera with multichannel flash synchronization signal, including the camera body and camera of connection connect
Mouthful, wherein, the camera interface includes synchronizing signal generation module, input module and power module, and power module is believed to be synchronous
Number generation module, input module provide power supply, and the pulse flash that synchronizing signal generation module receives image sensor chip is synchronous
Signal, the input information received according to input module, Multi-path synchronous signal of the generation with different effective orders, control is outside more
The open and close of individual flash lamp.
Here camera is divided into two parts, camera body and camera interface part；Wherein, camera flash synchronization signal belongs to
In a part for camera interface, external equipment can be output to by way of connector, for controlling various flash lamps, such as
LED/light source, mercury lamp etc..
Camera interface part can include flash synchronization signal, trigger signal, power supply signal etc..As shown in Fig. 2 camera connects
The flash synchronization signal of oral area point can include multichannel, and this figure is 4 tunnels.
Fig. 3 is flash synchronization signal generation part, and wherein flash synchronization signal generation module is according to input information, it is determined that many
The effective order of road synchronizing signal.The core devices of the module can be processor, DSP, FPGA, CPLD etc..The module is embedded
Program can be by user's online updating.Namely user can be with the state and built-up sequence of self-defined synchronizing signal.
By the different conditions of Multi-path synchronous signal, there can be multiple combinations output.It can be seen that such as from flow chart Fig. 4
If fruit has four kinds of assembled states, four kinds of combinations can be performed sequentially.
Fig. 5 gives a kind of built-up sequence of 4 tunnel synchronizing signal output.In the first image frame grabber, synchronizing signal 1 has
Effect, other synchronizing signals are invalid；In the second image frame grabber, effectively, other synchronizing signals are invalid for synchronizing signal 2；The 3rd
During image frame grabber, effectively, other synchronizing signals are invalid for synchronizing signal 3；In four image frame grabbers, synchronizing signal 4 is effective,
Other synchronizing signals are invalid；The like.
For the camera of global Exposure mode, above-mentioned so-called synchronizing signal effectively, can refer to effective time window and biography
Sensor exposure is completely the same, can refer to effective time window and be shorter than sensor exposure time, can also refer to effective time window long
In sensor exposure time.But effective time window must have overlapping part in time with exposure sensor.
For the camera of the curtain exposure with Global reset, above-mentioned so-called synchronizing signal is effective, when can refer to effective
Between window and sensor valid pixel expose completely the same simultaneously, can referring to effective time window, to be shorter than sensor valid pixel same
When the time for exposure, can also refer to effective time window be longer than sensor valid pixel simultaneously the time for exposure.But effective time window
Mouth must simultaneously expose with sensor valid pixel overlapping part in time.
For the camera of curtain Exposure mode, above-mentioned so-called synchronizing signal effectively, can refer to effective time window not short
The time exposed in sensor valid pixel；Effective time window and the time of sensor valid pixel exposure, which can also be referred to, one
Partially overlap.
Embodiment one：
Two-way synchronizing signal
In this embodiment, simple two-way signal replaces effective, i.e., complete time-sharing work, as shown in Figure 6.
A kind of camera with multichannel flash synchronization signal, includes the camera body and camera interface of connection, wherein, it is described
Camera interface includes synchronizing signal generation module, input module and power module, and power module is synchronizing signal generation module, defeated
Enter module and power supply is provided, synchronizing signal generation module receives the pulse flash synchronizing signal of image sensor chip, according to input
The input information that module is received, the effective two-way synchronizing signal of generation alternating, the open and close of the outside multiple flash lamps of control.
The synchronizing signal generation module, including trigger, decoder and the gate circuit being sequentially connected, trigger receive figure
As the pulse flash synchronizing signal of sensor chip, by the logical transition of decoder and gate circuit, generation is alternately effective double
Road synchronizing signal.
The synchronizing signal generation module, including counter and controller, counter connection controller, counter receive arteries and veins
Flash synchronization signal is rushed, by the analysis of controller, processing, the effective two-way synchronizing signal of output alternating.
The controller includes but is not limited to single-chip microcomputer, ARM and DSP Processor.
The synchronizing signal generation module, including counter and comparison circuit, counter connection comparison circuit, counter connect
Pulse flash synchronizing signal is received, by the conversion of comparison circuit, processing, the effective two-way synchronizing signal of output alternating.
The comparison circuit includes but is not limited to CPLD, FPGA and discrete circuit.
The synchronizing signal generation module receives set signal, reset signal or clock signal.
Embodiment two, two-way synchronizing signal
In this embodiment, during the first image frame grabber, signal 1 is effective；During the second image frame grabber, signal 1 and signal 2
It is effective；During three image frame grabbers, signal 1 is effective；The like.Timing diagram is as shown in Figure 7.
A kind of camera with multichannel flash synchronization signal, includes the camera body and camera interface of connection, wherein, it is described
Camera interface includes synchronizing signal generation module, input module and power module, and power module is synchronizing signal generation module, defeated
Enter module and power supply is provided, synchronizing signal generation module receives the pulse flash synchronizing signal of image sensor chip, according to input
The input information that module is received, generates two-way synchronizing signal as shown in Figure 7, the open and close of the outside multiple flash lamps of control.
The synchronizing signal generation module, including trigger, decoder and the gate circuit being sequentially connected, trigger receive figure
As the pulse flash synchronizing signal of sensor chip, by the logical transition of decoder and gate circuit, generation pair as shown in Figure 7
Road synchronizing signal.
The synchronizing signal generation module, including counter and controller, counter connection controller, counter receive arteries and veins
Flash synchronization signal is rushed, by the analysis of controller, processing, two-way synchronizing signal as shown in Figure 7 is exported.
The controller includes but is not limited to single-chip microcomputer, ARM and DSP Processor.
The synchronizing signal generation module, including counter and comparison circuit, counter connection comparison circuit, counter connect
Pulse flash synchronizing signal is received, by the conversion of comparison circuit, processing, two-way synchronizing signal as shown in Figure 7 is exported.
The comparison circuit includes but is not limited to CPLD, FPGA and discrete circuit.
The synchronizing signal generation module receives set signal, reset signal or clock signal.
Embodiment three, two-way synchronizing signal
In this embodiment, during the first image frame grabber, signal 1 is effective；During the second image frame grabber, signal 1 and signal 2
It is effective；During three image frame grabbers, signal 2 is effective；The like.Timing diagram is as shown in Figure 8.
A kind of camera with multichannel flash synchronization signal, includes the camera body and camera interface of connection, wherein, it is described
Camera interface includes synchronizing signal generation module, input module and power module, and power module is synchronizing signal generation module, defeated
Enter module and power supply is provided, synchronizing signal generation module receives the pulse flash synchronizing signal of image sensor chip, according to input
The input information that module is received, generates two-way synchronizing signal as shown in Figure 8, the open and close of the outside multiple flash lamps of control.
The synchronizing signal generation module, including trigger, decoder and the gate circuit being sequentially connected, trigger receive figure
As the pulse flash synchronizing signal of sensor chip, by the logical transition of decoder and gate circuit, generation pair as shown in Figure 8
Road synchronizing signal.
The synchronizing signal generation module, including counter and controller, counter connection controller, counter receive arteries and veins
Flash synchronization signal is rushed, by the analysis of controller, processing, two-way synchronizing signal as shown in Figure 8 is exported.
The controller includes but is not limited to single-chip microcomputer, ARM and DSP Processor.
The synchronizing signal generation module, including counter and comparison circuit, counter connection comparison circuit, counter connect
Pulse flash synchronizing signal is received, by the conversion of comparison circuit, processing, two-way synchronizing signal as shown in Figure 8 is exported.
The comparison circuit includes but is not limited to CPLD, FPGA and discrete circuit.
The synchronizing signal generation module receives set signal, reset signal or clock signal.
Synchronizing signal generation module embodiment：
Embodiment one：
As shown in figure 9, being generally configured with the camera of global exposure function, its image sensor chip has a pulse flash same
Step output signal.The synchronizing signal of a similar functions can also be generated by camera.This flash synchronization signal passes through synchronous letter
Number generative circuit, it is possible to the multichannel flash synchronization signal needed.This circuit includes trigger, decoder and door electricity
Road.The circuit can be realized with CPLD, FPGA, discrete circuit.
Eligible, synchronizing signal generative circuit can receive set signal；
Eligible, synchronizing signal generative circuit can receive reset signal；
Eligible, synchronizing signal generative circuit can receive clock signal.
Embodiment two：
As shown in Figure 10, the function of multichannel flash synchronization signal generation can be realized using circuits such as counter, comparators,
The circuit can be realized with CPLD, FPGA, discrete circuit.
Eligible, synchronizing signal generative circuit can receive set signal；
Eligible, synchronizing signal generative circuit can receive reset signal；
Eligible, synchronizing signal generative circuit can receive clock signal.
Embodiment three：
As shown in figure 11, multichannel flash synchronization signal generation can equally be realized with processor such as single-chip microcomputer, ARM, DSP etc.
Function, as long as being realized inside processor with software.
Eligible, synchronizing signal generative circuit can receive set signal；
Eligible, synchronizing signal generative circuit can receive reset signal；
Eligible, synchronizing signal generative circuit can receive clock signal.
Application implementation case
Embodiment one：
In industrial automation detection case, there are a kind of similar cylindrical part, such as industrial sensor.Such as Figure 12 institutes
Show, sensor divides from profile to be made up of three parts, is threaded portion, center section and connection part respectively.Threaded portion is used
In sensor is fixed in other workpiece or equipment；Center section connection screw thread part and connection part；Connection part is used
Connect out in electric signal.The content for needing detection is that whether threaded portion thread smooth, center section is close to threaded portion
Shoulder it is whether smooth, if any one position out-of-flatness to be detected, the part be defective work.
Because rejected region possibly be present in any one angle, the present embodiment, sensing is allowed by a rotating mechanism
Device often rotates to an angle, and such as 60 degree, stops, and detection of taking pictures then proceedes to rotation, until 360 degree of whole detections are finished.But
It is detection for two positions, it is necessary to different light source：The detection of thread part uses front light source, design sketch such as Figure 13 institutes
Show, the detection of the shoulder of center section, using backlight, design sketch is as shown in figure 14.Two kinds of light sources need timesharing to open, otherwise
It can interfere with each other.
In the present embodiment, camera has two flash synchronization output signals, and front light source and backlight can be controlled respectively.It is right
When thread part is taken pictures, the effective output of flash synchronization output signal of front light source is connected；When being taken pictures to shoulder, connection
The effective output of flash synchronization output signal of backlight.Can so reach with efficiency highest, cost it is minimum, using most simple
Mode realize the vision-based detection at two positions.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, not to present invention protection model
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deform still within protection scope of the present invention that creative work can make.
Claims (6)
1. a kind of camera with multichannel flash synchronization signal, it is characterized in that：Camera body and camera interface including connection, its
In, the camera interface includes synchronizing signal generation module, input module and power module, and power module generates for synchronizing signal
Module, input module provide power supply, and the pulse flash that synchronizing signal generation module receives camera image sensor chip is synchronously believed
Number, include the input information of predesignated set and reset signal according to what input module was received, generation has different effectively suitable
The Multi-path synchronous signal of sequence, the open and close of the outside multiple flash lamps of control；The pulse flash synchronizing signal is the height that chip is exported
Level or low level pulse signal, its valid interval are consistent with the effective exposure time of chip；The synchronizing signal generates mould
Block receives set signal, reset signal or clock signal；Camera interface includes flash synchronization signal, trigger signal, power supply signal,
Flash synchronization signal includes multichannel, and external equipment is output to by way of connector；Synchronizing signal generation module is according to input
Information, determines the effective order of Multi-path synchronous signal, and user can customize the state and built-up sequence of synchronizing signal；
The synchronizing signal generation module, including trigger, decoder and the gate circuit being sequentially connected, trigger receive image and passed
The pulse flash synchronizing signal of sensor chip, by the logical transition of decoder and gate circuit, forms multichannel flash synchronization signal；
The synchronizing signal generation module, including counter and controller, counter connection controller, counter receive pulse and dodged
Optical synchronous signal, by the analysis of controller, processing, output multi-channel flash synchronization signal；
The synchronizing signal generation module, including counter and comparison circuit, counter connection comparison circuit, counter receive arteries and veins
Flash synchronization signal is rushed, by the conversion of comparison circuit, processing, output multi-channel flash synchronization signal.
2. a kind of camera with multichannel flash synchronization signal as claimed in claim 1, it is characterized in that：The controller includes
But it is not limited to single-chip microcomputer, ARM and DSP Processor.
3. a kind of camera with multichannel flash synchronization signal as claimed in claim 1, it is characterized in that：The comparison circuit bag
Include but be not limited to CPLD, FPGA and discrete circuit.
4. a kind of camera with multichannel flash synchronization signal as claimed in claim 1, it is characterized in that：It is described different effectively suitable
The Multi-path synchronous signal of sequence is effective time window and the completely the same signal of exposure sensor, and the effective time window is necessary
There is overlapping part in time with exposure sensor.
5. a kind of camera with multichannel flash synchronization signal as claimed in claim 1, it is characterized in that：It is described different effectively suitable
The Multi-path synchronous signal of sequence is that effective time window is shorter than the signal of sensor exposure time, and the effective time window must be with
Exposure sensor has overlapping part in time.
6. a kind of camera with multichannel flash synchronization signal as claimed in claim 1, it is characterized in that：It is described different effectively suitable
The Multi-path synchronous signal of sequence is that effective time window is longer than the signal of sensor exposure time, and the effective time window must be with
Exposure sensor has overlapping part in time.
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| CN105959586B (en) * | 2016-05-25 | 2019-05-03 | 北京理工大学 | A kind of high-speed photography flash of light enhancement device |
| CN106534671A (en) * | 2016-11-02 | 2017-03-22 | 南京大学 | 360-degree image synchronization acquisition system |
| CN108429888B (en) * | 2018-04-28 | 2020-02-18 | 维沃移动通信有限公司 | Light supplementing method and mobile terminal |
| CN109688339B (en) * | 2019-01-21 | 2023-12-22 | 深圳精创视觉科技有限公司 | Programmable LED light source stroboscopic controller |
| CN111327836B (en) | 2020-03-20 | 2021-06-25 | 合肥埃科光电科技有限公司 | Camera exposure processing method and system |
| CN112584059B (en) * | 2020-12-11 | 2022-07-01 | 上海佳勒电子有限公司 | Method, device, system and storage medium for receiving, transmitting and flashing with multiple channels |
| CN113660429B (en) * | 2021-07-07 | 2023-05-19 | 深圳市劲码科技有限公司 | External Bluetooth flash lamp control method based on Bluetooth HID protocol |
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Effective date of registration: 20170831 Address after: Suzhou City, Jiangsu Province, Suzhou Industrial Park 215123 Xinghu Street No. 218 BioBAY A4-520 Patentee after: Suzhou Jujia Electronic Technology Co., LTD. Address before: 215500 Jiangsu, Suzhou, Changshou City, Southeast campus of Changshu Institute Of Technology, building T2 Patentee before: GFocus Technologies Co., Ltd. |