Multi-path light source stroboflash and camera trigger controller

Abstract

The utility model relates to the technical field of camera and light source control, and particularly provides a multipath light source stroboscopic and camera trigger controller, which comprises an external trigger signal conversion circuit, a communication interface, a main controller and an output signal conversion circuit, the input end of the external trigger signal conversion circuit receives an external trigger differential signal, and the output end is connected with the input end of the main controller; the input end of the communication interface receives an external control instruction, and the output end is connected with the input end of the main controller; the output end of the main controller is connected with the input end of the output signal conversion circuit; and the output end of the output signal conversion circuit is connected with 64 cameras and 32 stroboscopic light sources. According to the utility model, trigger signals are provided for more stroboscopic light sources and cameras, and the complexity of the whole control system is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to camera and light source control technical field, more specifically relates to a kind of multiway light source stroboscope and camera trigger controller. BACKGROUND

[0002] In the field of machine vision, a large number of different light sources of different types may be needed in complex application environments, and the control methods of these light sources are not uniform, and the camera needs to be triggered synchronously to capture feature images. The output channels of conventional controllers are generally not more than 4, and the number of controllable light sources and cameras is also limited. Therefore, multiple controllers of different types and sizes may be needed in a project, and the entire control system is very large, and the synchronization of cameras and light sources is also a major difficulty, and the stability and expandability are difficult to guarantee.

[0003] Therefore, how to reduce the complexity of the control system and increase the number of controllable stroboscopic light sources and cameras is a problem that needs to be solved by those skilled in the art. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides a kind of multiway light source stroboscope and camera trigger controller, it is favorable to reduce the complexity of entire control system, and more number of stroboscopic light source and camera are provided with trigger signal.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A kind of multiway light source stroboscope and camera trigger controller, comprising: external trigger signal conversion circuit, communication interface, main controller and output signal conversion circuit;The input end of the external trigger signal conversion circuit receives external trigger differential signal, and the output end is connected to the input end of the main controller;The input end of the communication interface receives external control instruction, and the output end is connected to the input end of the main controller;The output end of the main controller is connected with the input end of the output signal conversion circuit;The output end of the output signal conversion circuit is connected with 32 cameras and 64 stroboscopic light sources;

[0007] The external trigger signal conversion circuit is used to convert the received external trigger differential signal into a single-ended pulse signal, which is sent to the main controller as a basic timing signal;

[0008] The communication interface is used to send the received external control instruction to the main controller;

[0009] The main controller is used to allocate output port resources to corresponding cameras and stroboscopic light sources according to the received basic timing signal and external control instruction, and generate 64 pulse sequences;

[0010] The output signal conversion circuit converts the 64-channel pulse sequence output by the main controller into a differential signal form, which serves as the trigger signal for the corresponding camera and / or strobe light source.

[0011] Furthermore, the external trigger signal conversion circuit consists of an optocoupler chip and peripheral circuitry, wherein the optocoupler chip is HCPL_M601.

[0012] Furthermore, the peripheral circuit of the optocoupler chip includes a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, and a third capacitor; the first resistor and the first capacitor are connected in parallel between the positive input terminal IN+ and the negative input terminal IN- of the optocoupler chip; one end of the second resistor is connected to the positive signal of an external trigger differential signal, and the other end is connected to the parallel node of the first resistor and the first capacitor; the second capacitor and the third resistor are connected in series between the enable control terminal and the output terminal of the optocoupler chip; one end of the third capacitor is connected to the output terminal of the optocoupler chip, and the other end is connected to the ground terminal of the optocoupler chip.

[0013] Furthermore, the communication interface is an RS485 communication interface or an RS232 communication interface, and the external control commands received include at least: internal and external trigger switching information, allocation information of camera line signal, camera frame signal and light source strobe control signal, and pulse sequence frequency and duty cycle adjustment information.

[0014] Furthermore, the main controller adopts the FPGA series chip EP2C8Q208C8N.

[0015] Furthermore, the output signal conversion circuit uses a differential driver AM26C31.

[0016] Furthermore, the output signal conversion circuit is used to convert the 64 pulse sequences into differential signal form to provide frame signals and line signals for 32 cameras, or to provide strobe control signals for 64 strobe sources, or to provide signals for any number of cameras and strobe sources, provided that the total number of line signals and frame signals of the cameras and strobe control signals of the strobe sources is 64.

[0017] Furthermore, the communication interface is connected to a host computer.

[0018] As can be seen from the above technical solution, compared with the prior art, the present invention has the following beneficial effects:

[0019] The main controller can provide 64 pulse sequences, and trigger signals are provided for multiple cameras and stroboscopic light sources, so that the number of controllable stroboscopic light sources and cameras can be increased, and the complexity of the overall system can be reduced.

[0020] The external trigger signal conversion circuit receives external trigger signals and takes the external trigger signals as basic timing signals, so that the complete synchronization and time-sharing triggering of the multiple stroboscopic light sources and the cameras can be realized, and more image information can be obtained. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only a part of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0022] Figure 1 The structure diagram of the multi-channel light source stroboscopic and camera trigger controller provided by the present application is shown in the figure.

[0023] Figure 2 The structure diagram of the external trigger signal conversion circuit provided by the present application is shown in the figure.

[0024] Figure 3 The circuit structure schematic diagram of the communication interface provided by the present application is shown in the figure. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] As Figure 1As shown in the figure, this utility model embodiment discloses a multi-channel light source strobe and camera trigger controller, including: an external trigger signal conversion circuit, a communication interface, a main controller, and an output signal conversion circuit; the input terminal of the external trigger signal conversion circuit receives an external trigger differential signal, and the output terminal is connected to the input terminal of the main controller; the input terminal of the communication interface receives external control commands, and the output terminal is connected to the input terminal of the main controller; the output terminal of the main controller is connected to the input terminal of the output signal conversion circuit; the output terminal of the output signal conversion circuit is connected to 32 cameras and 64 strobe light sources;

[0027] The external trigger signal conversion circuit is used to convert the received external trigger differential signal into a single-ended pulse signal, which is then sent to the main controller as a basic timing signal.

[0028] The communication interface is used to send received external control commands to the main controller;

[0029] The main controller is used to allocate the output port resources to the corresponding cameras and strobe light sources according to the received basic timing signals and external control commands, and generate 64 pulse sequences;

[0030] The output signal conversion circuit converts the 64-channel pulse sequence output by the main controller into differential signal form, which serves as the trigger signal for the corresponding camera and / or strobe light source.

[0031] The following provides further explanation of each of the above parts.

[0032] The external trigger signal conversion circuit receives external trigger differential signals, including 7 channels of 5V differential signals and 7 channels of 24V TTL signals, and converts them into single-ended pulse signals as the basic timing signals of the main controller.

[0033] Specifically, such as Figure 2 As shown, the external trigger signal conversion circuit consists of an optocoupler chip and peripheral circuits, wherein the optocoupler chip is HCPL_M601.

[0034] The peripheral circuit of the optocoupler chip includes a first resistor R28, a second resistor R22, a third resistor R34, a first capacitor C11, a second capacitor C30, and a third capacitor C42. The first resistor R28 and the first capacitor C11 are connected in parallel between the positive input terminal IN+ and the negative input terminal IN- of the optocoupler chip. One end of the second resistor R22 is connected to the positive signal of the external trigger differential signal, and the other end is connected to the parallel node of the first resistor R28 and the first capacitor C11. The second capacitor C30 and the third resistor R34 are connected in series between the enable control terminal and the output terminal of the optocoupler chip. One end of the third capacitor C42 is connected to the output terminal of the optocoupler chip, and the other end is connected to the ground terminal of the optocoupler chip.

[0035] The communication interface is an RS485 communication interface or an RS232 communication interface, which forwards external control instructions sent by an upper computer to the main controller through connection of the upper computer. The received external control instructions at least include: internal and external trigger switching information, camera row signals, camera frame signals, and distribution information of three of light source stroboscopic control signals, frequency and duty cycle adjustment information of pulse sequences.

[0036] Taking the RS485 communication interface as an example, the circuit structure thereof is shown in Figure 3

[0037] The main controller adopts a Cyclone II series FPGA series chip EP2C8Q208C8N. The chip has 8256 logic units, provides up to 182 available input / output pins, 1.1 Mb embedded memory, and a working voltage of 1.2V, and supports various communication protocols including PCI Express, Gigabit Ethernet, SPI and IIC.

[0038] The main controller receives a single-ended pulse signal as a basic timing signal, and generates appropriate row signals and frame signals of the camera, and pulse signals for controlling the on-off frequency and duration of the stroboscopic light source in combination with external control instructions. According to the requirements of the external control instructions, the output port resources can be allocated to the camera and the stroboscopic light source, and 64 pulse sequences (the highest frequency can reach 100KHz, and the minimum pulse width is as small as 1us) can be generated.

[0039] The output signal conversion circuit adopts a differential driver AM26C31, which converts the single-ended pulse sequence signal output by the main controller into a differential signal, which can be directly used as the frame signal and the row signal of 32 cameras, or as the stroboscopic control trigger signal of 64 stroboscopic light sources. The interface form is a network port form (RJ45), and the camera and various stroboscopic light sources can also be combined and applied according to the external control instruction information. On the premise that the number of the row signal and the frame signal of the camera and the stroboscopic control signal of the stroboscopic light source is 64, the signal is provided for any number of cameras and stroboscopic light sources.

[0040] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same and similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0041] ​The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A strobe and camera trigger controller for multiple light sources, comprising: The application relates to a high-speed camera and strobe light source trigger signal conversion circuit. The application comprises an external trigger signal conversion circuit, a communication interface, a main controller and an output signal conversion circuit; the input end of the external trigger signal conversion circuit receives an external trigger differential signal, and the output end is connected with the input end of the main controller; the input end of the communication interface receives an external control instruction, and the output end is connected with the input end of the main controller; the output end of the main controller is connected with the input end of the output signal conversion circuit; and the output end of the output signal conversion circuit is connected with 32 cameras and 64 strobe light sources. The external trigger signal conversion circuit is used for converting the received external trigger differential signal into a single-end pulse signal, and sending the single-end pulse signal as a basic timing signal to the main controller. The communication interface is used for sending the received external control instruction to the main controller. The main controller is used for allocating output port resources to corresponding cameras and strobe light sources according to the received basic timing signal and external control instruction, and generating 64 pulse sequences. The output signal conversion circuit converts the 64 pulse sequences output by the main controller into differential signal forms, and the differential signal forms are used as trigger signals of corresponding cameras and / or strobe light sources.

2. The multi-channel strobe and camera trigger controller of claim 1, wherein, The external trigger signal conversion circuit is composed of an optocoupler chip and a peripheral circuit, wherein the optocoupler chip is HCPL_M601.

3. The multi-channel strobe and camera trigger controller of claim 2, wherein, The peripheral circuit of the optocoupler chip comprises a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor and a third capacitor; the first resistor and the first capacitor are connected in parallel between the positive input end IN+ and the negative input end IN- of the optocoupler chip; one end of the second resistor is connected with the positive signal of the external trigger differential signal, and the other end is connected with the parallel node of the first resistor and the first capacitor; the second capacitor and the third resistor are connected in series between the enable control end and the output end of the optocoupler chip; one end of the third capacitor is connected with the output end of the optocoupler chip, and the other end is connected with the ground end of the optocoupler chip.

4. The multi-channel strobe and camera trigger controller of claim 1, wherein, The communication interface is an RS485 communication interface or an RS232 communication interface, and the received external control instruction at least comprises internal-external trigger switching information, allocation information of three of a camera row signal, a camera frame signal and a strobe light source flash control signal, frequency and duty cycle adjustment information of a pulse sequence.

5. The multi-channel strobe and camera trigger controller of claim 1, wherein, The main controller adopts an FPGA series chip EP2C8Q208C8N.

6. The multi-channel strobe and camera trigger controller of claim 1, wherein, The output signal conversion circuit adopts a differential driver AM26C31.

7. The multi-channel strobe and camera trigger controller of claim 1, wherein, The output signal conversion circuit is used for converting the 64 pulse sequences into differential signal forms, and is used for providing frame signals and row signals for 32 cameras, or providing flash control signals for 64 strobe light sources, or providing signals for any number of matched cameras and strobe light sources on the premise that the number sum of the row signals and the frame signals of the cameras and the flash control signals of the strobe light sources is 64.

8. The multi-channel strobe and camera trigger controller of claim 1, wherein, The communication interface is connected with an upper computer.

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