Automatic automobile exhaust monitoring system based on image and FPGA (Field Programmable Gate Array)

Abstract

The invention relates to an automatic automobile exhaust monitoring system based on an image and an FPGA (Field Programmable Gate Array), and belongs to a signal processing technology and an industrial measurement and control technology. The automatic automobile exhaust monitoring system can realize the qualitative monitoring on automobile exhaust emission by taking an FPGA chip as a processing core of digital images and detecting a sequential-image concerned region. An image of a running automobile can be obtained through a CCD (Charged Coupled Device), analog data are converted into digital data by an A / D conversion chip, the region interested in the image is stored into a buffer through FPGA control, and the FPGA can realize an exhaust location and exhaust contour extraction algorithm by means of hardware logics and the division for a 'black smoke' region of automobile exhaust, determine the pollution level of the automobile according to the pixel area and give an alarm at the sametime. The automatic automobile exhaust monitoring system has the advantages of good system real-time performance and strong extensible elements due to the hardware realization of an image processing algorithm, without core processing units such as an industrial personal computer or DSP (Digital Signal Processor) and the like.

Description

Technical field

[0001] The invention relates to an automatic vehicle exhaust monitoring system based on images and FPGA, which belongs to signal processing technology and industrial measurement and control technology. It uses FPGA chip as the processing core of digital images, and realizes the detection of the interest area of ​​the sequence image to pass vehicles Monitoring of excessive exhaust emissions. Background technique

[0002] With the rapid development of my country's social economy and the improvement of people's living standards, the number of cars in my country is also increasing rapidly, and the problem of car exhaust pollution that follows is also becoming increasingly serious. Automobile pollutant emission has become the main source of air pollution in many cities. Therefore, controlling the emission of pollutants in vehicle exhaust is of great significance to protecting the ecological environment on which humans depend and the health and safety of the people. [0...

Examples

Embodiment Construction

[0016] In the concrete realization process of this system, FPGA adopts EP1C12 chip in Cyclone series FPGA of Altera Company of USA. The chip has a density of 12,060 LE units (each LE includes a LUT, a flip-flop and related logic, which is the most basic structure of the chip to achieve logic, and is also the main indicator of FPGA comprehensive performance evaluation), which can fully meet the image processing algorithm and The need for system logic control; 169 user-available I / O ports meet the multiple chip connection requirements of the system for image acquisition and storage; the video acquisition unit uses CCD, which can collect on-site images and send them to the A / D conversion chip for operation Further processing; A / D chip adopts PHILIPS company’s 7113H chip, 7113H chip has 4 analog channels, through time-sharing collection of 4 image signals, time-sharing processing, you can select the conversion mode of 7113H through programming, through I 2 The C bus is programmed to...

Technical field

[0001] The invention relates to an automatic vehicle exhaust monitoring system based on images and FPGA, which belongs to signal processing technology and industrial measurement and control technology. It uses FPGA chip as the processing core of digital images, and realizes the detection of the interest area of ​​the sequence image to pass vehicles Monitoring of excessive exhaust emissions. Background technique

[0002] With the rapid development of my country's social economy and the improvement of people's living standards, the number of cars in my country is also increasing rapidly, and the problem of car exhaust pollution that follows is also becoming increasingly serious. Automobile pollutant emission has become the main source of air pollution in many cities. Therefore, controlling the emission of pollutants in vehicle exhaust is of great significance to protecting the ecological environment on which humans depend and the health and safety of the people. [0...

Examples

Embodiment Construction

[0016] In the concrete realization process of this system, FPGA adopts EP1C12 chip in Cyclone series FPGA of Altera Company of USA. The chip has a density of 12,060 LE units (each LE includes a LUT, a flip-flop and related logic, which is the most basic structure of the chip to achieve logic, and is also the main indicator of FPGA comprehensive performance evaluation), which can fully meet the image processing algorithm and The need for system logic control; 169 user-available I / O ports meet the multiple chip connection requirements of the system for image acquisition and storage; the video acquisition unit uses CCD, which can collect on-site images and send them to the A / D conversion chip for operation Further processing; A / D chip adopts PHILIPS company’s 7113H chip, 7113H chip has 4 analog channels, through time-sharing collection of 4 image signals, time-sharing processing, you can select the conversion mode of 7113H through programming, through I 2 The C bus is programmed to...

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