A mass flow detection method, device and system
A mass flow and detection method technology, applied to mass flow measurement devices, indirect mass flow meters, etc., can solve the problems of low detection accuracy and poor pertinence
Active Publication Date: 2021-08-17
西安多普多信息科技有限公司
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[0004] The purpose of the present disclosure is to provide a mass flow detection method, device and system to solve the technical problem that the existing vehicle mass flow detection device is not very specific to the different states of the vehicle and different environments, and thus the detection accuracy is low
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[0062] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.
[0063] In the related technologies of flow detection, the flow detection method for vehicle exhaust is usually to connect the mass flow detection equipment based on the Venturi tube principle with the exhaust pipe of the vehicle to be tested, and then perform mass flow detection through the mass flow detection equipment, And based on the mathematical characteristics of the detection data itself, such as the actual numerical value and spectrum waveform, the detection data is processed, and then the processed mass flow data is output. However, the above method does not take into account the influence of the environmental factors of the vehicle (such as ambient ...
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The present disclosure relates to a mass flow detection method, device and system. The method includes: after the vehicle to be tested is started, collecting a plurality of differential pressure detection data corresponding to the vehicle exhaust flowing through the Venturi tube in a preset period; Filtering and data fusion of multiple differential pressure detection data to obtain target differential pressure data; determine the mass flow detection data of vehicle exhaust in a preset period according to the target differential pressure data and exhaust gas temperature data; The pipe parameters of the Venturi tube, the atmospheric pressure and the ambient temperature of the current environment where the vehicle to be tested are located, and the mass flow detection data are corrected to obtain mass flow data. It can perform filtering and data fusion on multiple detection data obtained in one detection cycle, and correct the fused detection data according to the structural characteristics of the Venturi tube and the connecting pipe itself, the atmospheric pressure and the ambient temperature of the vehicle, and improve the performance of the vehicle. Accuracy of vehicle exhaust mass flow detection during driving.
Description
technical field [0001] The present disclosure relates to the field of vehicle emission detection, in particular, to a mass flow detection method, device and system. Background technique [0002] In recent years, with the sharp increase in the number of motor vehicles in the world, the pollution caused by motor vehicle exhaust emissions has become increasingly serious. According to statistics from the United Nations Environment Programme, the total number of various motor vehicles currently in use in the world has exceeded 1 billion, and the average exhaust emission has reached 13.25 million tons per day. The impact on global air pollution is becoming more and more obvious. At present, the concept of reducing vehicle emission pollution is to gradually increase the emission standards of motor vehicles, accurately monitor the exhaust emissions of motor vehicles through the exhaust emission detection system, force manufacturers to implement emission reduction measures, and impro...
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IPC IPC(8): G01F1/88
CPCG01F1/88
Inventor 张单群王修亮马超刘登赵建旭
Owner 西安多普多信息科技有限公司