Automobile emission flow analysis meter with gas collection flexible pipe disengaged detection and method of automobile emission flow analysis meter

Abstract

The invention discloses an automobile emission flow analysis meter with gas collection flexible pipe disengaged detection and a method of the automobile emission flow analysis meter. The analysis meter comprises a microprocessor, a gas collection flexible pipe with a taper pipe, a fan, a CO2 concentration measurement device, an O2 concentration measurement device, a temperature measurement device, a pressure measurement device and a flow measurement device, wherein the fan, the CO2 concentration measurement device, the O2 concentration measurement device, the temperature measurement device, the pressure measurement device and the flow measurement device are connected to the gas collection flexible pipe. The CO2 concentration measurement device, the O2 concentration measurement device, the temperature measurement device, the pressure measurement device and the flow measurement device are respectively and electrically connected with the microprocessor and capable of transmitting measured CO2 concentration data, O2 concentration data, temperature data, pressure data and flow data in automobile emission after dilution to the microprocessor. The CO2 concentration measurement device and the O2 concentration measurement device are connected, and the automobile emission is sent to the O2 concentration measurement device through the CO2 concentration measurement device. According to the automobile emission flow analysis meter with the gas collection flexible pipe disengaged detection and the method of the automobile emission flow analysis meter, defects of an existing device can be effectively overcome. When the gas collection flexible pipe is disengaged, the flow analysis meter will automatically alarm people and remind the people to terminate a test.

Description

technical field [0001] The invention belongs to the field of automobile emission detection devices, and in particular relates to an automobile exhaust flow analyzer and a method thereof capable of detection of detachment of an air-collecting hose. Background technique [0002] The simple transient working condition method is an in-use vehicle emission detection method stipulated in GB 18285-2005 "Limits and Measurement Methods of Exhaust Pollutant Emissions from Ignition Engine Vehicles (Double Idle Speed ​​Method and Simple Working Condition Method)". Detection devices include chassis dynamometer, exhaust gas analyzer, flow analyzer, etc. During the detection process, the air collecting hose of the flow analyzer is generally placed on the exhaust pipe, and a certain gap is left to ensure that the diluted flow rate reaches the specified value. The exhaust gas flow rate and dilution gas concentration are analyzed, and then the exhaust gas quality emitted by the vehicle can b...

AI Technical Summary

Problems solved by technology

[0003] During the detection process, since the vehicle is simulated loaded on the chassis dynamometer, although certain safety protection measures such as fixing measures and traction have been taken, the vehicle and exhaust pipe will inevitably vibrate and move. The tube is easy to fall off, resulting in incorrect detection flow and gas concentration after dilution. If the detection is not detected in time and the detection is terminated, the detection results will not truly reflect the real emission of the vehicle.

[0004] When the gas collecting hose falls off, the current automobile exhaust flow analyzer cannot judge and give a prompt

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