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 same time. 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 monitoring system for automobile exhaust based on image 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 passing vehicles by detecting the region of interest in sequence images. Excess emissions monitoring. Background technique

[0002] With the rapid development of my country's social economy and the improvement of people's living standards, the number of automobiles in my country is also increasing rapidly, and the problem of automobile exhaust pollution is also becoming more and more serious. Vehicle 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 protect the ecological environment on which human beings depend and the health and safety of th...

Examples

Embodiment Construction

[0016] In the specific realization process of this system, the FPGA adopts the EP1C12 chip in the Cyclone series FPGA of Altera Company of the United States. The chip has a density of 12060 LE units (each LE includes a LUT, a flip-flop and related logic, which is the most basic structure of chip implementation logic and the main index of FPGA comprehensive performance evaluation), which can fully meet the needs of image processing algorithms and The need for system logic control; 169 user-available I / O ports meet the system’s multi-chip connection requirements 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 as a Further processing; the A / D chip adopts the 7113H chip of PHILIPS Company, and the 7113H chip has 4 analog channels, which can be processed by time-sharing to collect 4-way image signals, and the conversion mode of 7113H can be selected by programming. 2 C bus for programm...

technical field

[0001] The invention relates to an automatic monitoring system for automobile exhaust based on image 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 passing vehicles by detecting the region of interest in sequence images. Excess emissions monitoring. Background technique

[0002] With the rapid development of my country's social economy and the improvement of people's living standards, the number of automobiles in my country is also increasing rapidly, and the problem of automobile exhaust pollution is also becoming more and more serious. Vehicle 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 protect the ecological environment on which human beings depend and the health and safety of th...

Examples

Embodiment Construction

[0016] In the specific realization process of this system, the FPGA adopts the EP1C12 chip in the Cyclone series FPGA of Altera Company of the United States. The chip has a density of 12060 LE units (each LE includes a LUT, a flip-flop and related logic, which is the most basic structure of chip implementation logic and the main index of FPGA comprehensive performance evaluation), which can fully meet the needs of image processing algorithms and The need for system logic control; 169 user-available I / O ports meet the system’s multi-chip connection requirements 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 as a Further processing; the A / D chip adopts the 7113H chip of PHILIPS Company, and the 7113H chip has 4 analog channels, which can be processed by time-sharing to collect 4-way image signals, and the conversion mode of 7113H can be selected by programming. 2 C bus for programm...

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