CN210112127U

CN210112127U - Microscopic camera system with independent main control circuit board and image sensing circuit board

Info

Publication number: CN210112127U
Application number: CN201921438276.2U
Authority: CN
Inventors: 余飞鸿; 章挺; 郭晓龙
Original assignee: Hangzhou Touptek Photoelectric Technology Co Ltd
Current assignee: Hangzhou Touptek Photoelectric Technology Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-02-21
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses a main control circuit board and independent micro-camera system of image sensing circuit board, micro-camera system includes the main control circuit board, the last integration of main control circuit board has on-the-spot programmable logic array, standard transmission interface, synchronous dynamic random access memory and Flash memory, micro-camera system is still including the image sensing circuit board that integrates image sensor, the image sensing circuit board passes through the connector and is connected with the main control circuit board. The utility model provides a different image sensor of configuration that micro-camera system can convenient and fast more has simplified the hardware system structure of micro-camera system.

Description

Microscopic camera system with independent main control circuit board and image sensing circuit board

Technical Field

The utility model belongs to the micro-camera field, in particular to independent micro-camera system of master control circuit board and image sensing circuit board.

Background

As an emerging technology, a machine vision system can successfully replace human vision observation and judgment in many fields, and a camera is generally used at the front end of the machine vision system and is mainly responsible for collecting and transmitting image information. The lens in the camera converges light rays on the photosensitive device, and the photosensitive device converts light signals into electric signals, so that an electronic image corresponding to a shot scene is obtained. For example, chinese patent publication No. CN203219391U discloses an optical field camera capable of taking digital photos, which includes an imaging lens, a micro-lens array, an image sensor, and a PCB; the image sensor is positioned on an incident light path incident through the imaging lens, and the micro lens array is movably arranged between the image sensor and the imaging lens, so that the micro lens array can be positioned on the incident light path or outside the incident light path; the image sensor is electrically connected with the PCB, and the movement of the micro-lens array is controlled by the PCB.

The cameras on the market today have the following limitations in use: in the traditional camera development process, the distribution of hardware resources is determined by planning various functions in the early stage, and a schematic diagram and PCB layout and wiring are required to be re-planned in the hardware development process, so that too much time and cost are occupied by hardware development in the whole development process, and the progress of the whole project is delayed. In addition, if an unavoidable hardware problem is involved, it is necessary to newly modify the board, newly design a schematic diagram, and newly perform layout, wiring, and proofing of a PCB, and newly design a structure involved in the structure modification. Therefore, it is necessary to provide a camera that simplifies the hardware system structure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a main control circuit board and independent micro-camera system of image sensing circuit board, the different image sensor of configuration that can convenient and fast more.

The utility model provides a following technical scheme:

a microscope camera system with a main control circuit board and an image sensing circuit board independent comprises the main control circuit board, wherein a field programmable logic array, a standard transmission interface, a synchronous dynamic random access memory and a Flash memory are integrated on the main control circuit board, the microscope camera system further comprises the image sensing circuit board integrated with an image sensor, and the image sensing circuit board is connected with the main control circuit board through a connector.

According to the invention, through the connectors on the main control circuit board and the image sensing circuit board, not only is the mutual communication between the main control circuit board and the image sensing circuit board realized, but also the influence of the surrounding environment on the combined circuit can be effectively prevented, and the phenomena of poor contact and the like are avoided. The invention can realize the configuration of different image sensors by replacing the image sensing circuit board, thereby simplifying the hardware system structure of the microscope camera system.

The two pairs of connectors are respectively arranged on two sides of the main control circuit board and the image sensor circuit board, one connector is used for transmitting a clock signal and a driving signal to the image sensor through the field programmable logic array, and the other connector is used for transmitting a clock signal and a data signal to the field programmable logic array through the image sensor.

In the microscope camera system provided by the invention, the field programmable logic array receives online data and programs through a standard transmission interface and updates the programs and firmware in the Flash memory; the field programmable logic array analyzes codes from the Flash memory and outputs corresponding clock signals and driving signals to the image sensor. The main function of the synchronous dynamic random access memory is to store the data of the complete frame received by the field programmable logic array, and then the data is read out continuously through the field programmable logic array, so that the influence of the incomplete frame on the whole video stream is avoided. And the main control circuit board and the image sensing circuit board are respectively provided with a power supply module for supplying power.

Wherein, the field programmable logic array transmits the clock signal to the image sensor: CLK _ 41M;

the driving signals transmitted by the field programmable logic array to the image sensor are as follows:

1)22 control signals:

RAMP/VDDC/RST/TX2_ODD/TX2_EVEN/VTZ/C_INIT/SAM/CPC/READ/TAC/SYNC/TR_CR/TS_CS_TEST/GRST<0>/GRST<1>/GRST<2>/GRST<3>/TRAIN/TX1_ODD/TX1_EVEN/FOT；

2) 4-wire SPI protocol: SPI _ CLK/SPI _ SYNC/SPI _ DATA/SPI _ OUT;

3)13 address control lines: decoder <12:0 >.

Clock signals transmitted by the image sensor to the field programmable logic array:

CLK_500M_N/CLK_500M_P；

the data signals transmitted by the image sensor to the field programmable logic array are as follows:

9 data channel signals: channel <8:0 >.

The connector on the main control circuit board is two connector female ports, two connector male ports or one connector male port and one connector female port, and the connector on the image sensing circuit board is two connector male ports, two connector female ports or one connector female port and one connector male port.

The connector on the main control circuit board is a male connector and a female connector, and the connector on the image sensing circuit board is a female connector and a male connector. The stability of the whole system can be improved by the crossed use of the male connector port and the female connector port.

The number of the interfaces of the connector is larger than the number of the signals needing to be reserved. Preferably, the connectors are 60-port, 70-port or 80-port connectors. More preferably, the number of the connectors is 60. Because the more the interface count draws the circuit board the time the difficulty of walking the line also is big, also can cause the too big circuit board size that influences of connector's volume, consequently the size of the signal count of the comprehensive consideration and circuit board selects the connector with 60 mouths.

In the present invention, the connector is a board-to-board connection type connector.

Preferably, the connector is a high speed connector. The signal transmitted to the main control circuit board by the image sensing circuit board is a Low Voltage Differential Signal (LVDS) which belongs to a high-speed signal, so that the connector selects a high-speed connector.

The image sensor is a CCD image sensor or a CMOS image sensor. The CMOS image sensor comprises a CMOS linear array image sensor and a CMOS area array image sensor. Preferably, the image sensor is a CMOS area array image sensor, the CMOS image sensor is simple to drive, high in integration level, low in power consumption, and high in frame frequency, and the CMOS area array image sensor can directly acquire two-dimensional image information, so that the measured image is more intuitive.

Compared with the prior art, the utility model provides a micro-camera system is through independently coming out image sensing circuit board, can only dispose different image sensor through the mode of changing image sensing circuit board, and need not change whole master control circuit board, simple structure, convenient to use. Moreover, a user can update the field programmable logic array FPGA on line, each path of driving signals and data signals which can support the image sensor are reserved on the connector, the main control circuit carries out corresponding configuration on the driving signals by identifying the firmware ID of the camera model, and the same main control circuit board can identify and be compatible with CCD or CMOS image sensors of different models by downloading the program package and the firmware of the corresponding CCD or CMOS image sensor, so that the driving of the image sensor is realized, the requirement of the user on continuous change is met, and the development cost and the research and development time are reduced while the hardware system structure is simplified; meanwhile, various uncertain conditions caused by hardware connection line updating when the camera is disassembled are avoided.

Drawings

Fig. 1 is an overall structure diagram of a microscope camera system with a main control circuit and an image sensing circuit independent provided by an embodiment;

fig. 2 is a schematic diagram of signal transmission between a main control circuit board and an image sensing circuit board according to an embodiment;

FIG. 3 is a schematic structural diagram of a microscope camera system with independent main control circuit and image sensing circuit according to an embodiment;

fig. 4 is a schematic diagram of 22 control signals between the main control circuit board and the image sensing circuit board according to the embodiment;

fig. 5 is a schematic diagram of a 4-wire SPI protocol between a main control circuit board and an image sensing circuit board according to an embodiment;

fig. 6 is a schematic diagram of a 13-way address bus between a main control circuit board and an image sensing circuit board according to an embodiment;

fig. 7 is a schematic diagram of 9 channels of data signals between a main control circuit board and an image sensing circuit board according to an embodiment;

fig. 8 is a schematic diagram of clock signals between a main control circuit board and an image sensing circuit board according to an embodiment;

the system comprises a main control circuit board 1, an image sensing circuit board 2, a field programmable logic array 3, a transmission standard interface 4, a Flash memory 5, a synchronous dynamic random access memory 6, a first connector 7, a second connector 8 and an image sensor 9.

Detailed Description

The present invention will be further described with reference to the following examples and drawings, but the present invention is not limited thereto.

Example 1

As shown in fig. 3, the present invention provides a micro-camera system including an optical lens, a mechanical housing, a main control circuit board 1 and an image sensor circuit board 2 connected via a connector. The main control circuit board 1 drives the image sensing circuit board 2 through signals of the connector, so that the image sensor senses incident light passing through the optical lens, converts optical signals into digital signals and transmits the digital signals to the main control circuit board 1 for processing data parts.

The main control circuit board 1 includes: the device comprises a power module, a field programmable logic array 3, a standard transmission interface 4, a Flash memory 5, a synchronous dynamic random access memory 6 and a first connector 7; the power module is used for supplying power to the main control circuit board 1, and the field programmable logic array 3 is electrically connected with the standard transmission interface 4, the Flash memory 5, the synchronous dynamic random access memory 6 and the first connector 7.

The image sensor circuit board 2 includes: a power module, an image sensor 9 and a second connector 8; the power module is used for supplying power to the image sensor circuit board 2, and the image sensor 9 is electrically connected with the second connector 8.

The main control circuit board 1 and the image sensor circuit board 2 are respectively provided with a first connector 7 and a second connector 8, the first connector 7 comprises a male connector port and a female connector port, the second connector 8 comprises a male connector port and a female connector port, and the first connector 7 and the second connector 8 are connected with the main control circuit board 1 and the image sensor circuit board 2 through the male connector port and the female connector port.

The image sensor 9 adopted in this embodiment is a CMOS image sensor, which is a GMAX0806 type sensor of changchun long-core photoelectric technology limited company, and belongs to a CMOS area array image sensor, and the photosensitive area is: 22.16mm 15.22mm, the corresponding pixel size is only: 2.8um by 2.8um, maximum resolution is: 7920 × 5436, dynamic range is only: 66dB, better image quality; the utility model discloses a field programmable logic array FPGA be Xilinx company artist-7 series's a section FPGA: XC7A75T supports 6.6G transceiver up to 16 routes, 930GMAC, 13Mb BRAM, 1.2Gb/s LVDS and DDR3-1066, and has the advantages of low power consumption, high capacity, high performance, strong portability and the like. The standard transmission interface adopted by the embodiment is a USB3.0 transmission interface, the maximum transmission bandwidth of the USB3.0 interface can reach 5Gbps, and the USB2.0 interface can be downward compatible, so that the transmission efficiency of the camera system can be greatly improved.

The working process of the microscope camera system provided by the embodiment is as follows:

the field programmable logic array FPGA3 in the main control circuit board 1 first reads out the program from the Flash memory 5, and identifies the image sensor 9 (in this embodiment, a CMOS image sensor: GMAX0806) by detecting the firmware ID of the camera model. Signal transmission between the main control circuit board 1 and the image sensing circuit board 2 is shown in fig. 2.

When the identification is successful, the FPGA3 configures a corresponding clock signal interface, a driving signal interface, and a data signal interface, and selects an input clock, a control signal line, a communication line, and an address bus corresponding to the CMOS image sensor, where the input clock required by the CMOS image sensor is CLK _41M, and there are 22 control signal lines in total (as shown in fig. 4): RAMP/VDDC/RST/TX2_ ODD/TX2_ EVEN/VTZ/C _ INIT/SAM/CPC/READ/TAC/SYNC/TR _ CR/TS _ CS _ TEST/GRST <0>/GRST <1>/GRST <2>/GRST <3>/TRAIN/TX1_ ODD/TX1_ EVEN/FOT, and the communication line uses 4-wire SPI protocol (as shown in FIG. 5): SPI _ CLK/SPI _ SYNC/SPI _ DATA/SPI _ OUT, a total of 13 address control lines of the address bus (as shown in FIG. 6): decoder <12:0 >. The connector used in this embodiment is a 60-port connector.

Meanwhile, the field programmable logic array FPGA3 outputs a driving signal through a connector to perform power-on operation on a GMAX0806CMOS image sensor in the image sensing circuit board 2, and after the power-on operation is completed, the field programmable logic array FPGA3 performs data writing on an internal register of the CMOS image sensor through an SPI communication protocol. Meanwhile, the CMOS image sensor will transmit the lvds (low Voltage Differential signaling) signal through 9 data channels (as shown in fig. 7): the CLK _500M _ N/CLK _500M _ P of Channel <8:0> and differential clock (as shown in FIG. 8) transfer data to the FPGA3, maintaining stable operation of the entire system.

As shown in FIG. 1, the utility model provides a many block image sensing circuit board can be matchd to the micro-camera system, and the main control circuit board can be through the firmware ID discernment that detects the camera model and the image sensor of compatible different models, the serialization development of very applicable product, when simplifying hardware system design, reducing development cost, realizes the quick release of product.

The above embodiments are merely specific examples for further explaining the objects, technical solutions and advantageous effects of the present invention in detail, and the present invention is not limited thereto. Any modification, equivalent replacement, improvement and the like made within the scope of the disclosure of the present invention are all included in the protection scope of the present invention.

Claims

1. A microscope camera system with a main control circuit board and an image sensing circuit board independent is characterized in that the microscope camera system further comprises the image sensing circuit board integrated with an image sensor, and the image sensing circuit board is connected with the main control circuit board through a connector.

2. The microscope camera system with the main control circuit board and the image sensing circuit board independent from each other as claimed in claim 1, wherein the connectors are provided in two pairs, respectively disposed at two sides of the main control circuit board and the image sensing circuit board, one pair of connectors is used for the field programmable logic array to transmit clock signals and driving signals to the image sensor, and the other pair of connectors is used for the image sensor to transmit clock signals and data signals to the field programmable logic array.

3. The independent microscopy camera system according to claim 2, wherein the connectors on the master control circuit board are a male connector port and a female connector port, and the connectors on the image sensing circuit board are a female connector port and a male connector port.

4. The master control circuit board and image sensing circuit board independent microscopy camera system of claim 1, wherein the connectors are 60-port, 70-port or 80-port connectors.

5. The master control circuit board and image sensing circuit board independent microscopy camera system of claim 1, wherein the connector is a high speed connector.

6. The main control circuit board and image sensing circuit board independent microscopy camera system of claim 1, wherein the image sensor is a CCD image sensor or a CMOS image sensor.