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usb3.0cmos line scan industrial camera
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An industrial camera and line array technology, applied in TV, color TV parts, TV system parts, etc., can solve the problems of unsatisfactory acquisition speed, huge camera power consumption, high interface bandwidth, etc.
Active Publication Date: 2022-02-08
北京凯视佳光电设备有限公司
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[0006] With the rapid improvement of image acquisition speed in recent years, the above industrial cameras have the following disadvantages: 1. The power consumption of industrial cameras using CCD image sensors is greater than that of industrial cameras with CMOS image sensors, so that at high acquisition speeds, the camera power consumption must be quite huge
2. The image quality of the area array sensor is lower than that of the line array image sensor at the same price. 3. The bandwidth of the camera with the GigE interface is limited to 1.25Gb / s, and the bandwidth of the camera with the USB2.0 interface is only 480Mb / s, which cannot meet the higher acquisition requirements. speed requirement
The bandwidth of the Camera Link interface is high, but the interface is huge. At the same time, it needs to be equipped with an expensive acquisition card, which limits the application cost and convenience
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[0017] The operating process of the present invention is as follows:
[0018] (1) attached figure 1 The hardware structure of the present invention is given, the hardware is welded and assembled according to the figure, and the driver is implanted into the ddr3 through the usb interface. The invention comprises: a USB3.0 universal bus interface and its controller, a programmable logic chip PLD, a synchronous random access memory DDR3, a field programmable array FPGA, a linear array CMOS image sensor, and a power management module.
[0019] The working principle of the present invention is: the camera is connected with the host through the usb bus and provides the power required by the camera. The power supply is provided by the power management module to each module inside the camera. The CMOS line array image sensor senses the image signal, and transmits the clock signal CLK, standard data signal DATA, and long data signal LVAL to the programmable logic core PLD module, and...
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Abstract
USB3.0 CMOS linear array industrial camera is an industrial camera with USB3.0 interface and linear array CMOS image sensor, which is used to improve acquisition speed and image resolution, reduce camera size, reduce cost and power consumption. It includes: USB3.0 universal bus interface and its controller, programmable logic chip PLD, synchronous random access memory DDR3, field programmable array FPGA, linear array CMOS image sensor, power management module. After powering on, connect the camera to the host, the camera will automatically enumerate USB2.0 devices, and then enumerate USB3.0 devices. If the enumeration of USB3.0 devices is successful, set the transmission bandwidth of the USB device to 5Gb / s, otherwise set the transmission bandwidth of the USB device It is 480Mb / s; then set image parameters, camera hardware splicing parameters, working mode, image data acquisition and external trigger mode query, accept external trigger signal, otherwise query software trigger mode, accept software trigger command, otherwise enter automatic continuous working mode , collect the image line array signal, and then perform 12bit to 8bit image compression, image hardware splicing, and complete the acquisition.
Description
[0001] (1) Technical field [0002] The invention relates to an industrial camera, in particular to a CMOS linear array industrial camera with a USB3.0 interface. (2) Background technology [0003] Industrial cameras are a key component in machine vision systems. Compared with traditional cameras, they have high image stability, high transmission bandwidth, and high anti-interference capabilities. Most industrial cameras currently on the market are based on CCD or CMOS chips. Early industrial cameras mostly used PAL / NTSC / SECAM / S-VIDEO and other formats for signal output, which required special image acquisition cards to convert them into computer-processable digital information. With the development and popularization of digital interface technologies such as GigE / USB / IEEE / DCOM / Camera LinkLVDS, more and more industrial digital cameras have replaced traditional analog cameras in various machine vision system applications. Industrial cameras can be divided into line scan camera...
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