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Gas and solid phase SVOCs synchronous sampling system suitable for vehicle-mounted test of motor vehicle

A synchronous sampling, motor vehicle technology, which is applied in the direction of temperature control, sampling, and measurement devices using electric methods, can solve problems such as inability to switch, unsuitable for high-temperature exhaust gas sampling and bumpy in-vehicle test environment, etc., to achieve convenient in-vehicle use, Good shock absorption, simple and compact structure

Pending Publication Date: 2018-09-11
TSINGHUA UNIV
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Problems solved by technology

However, the measurement of semi-volatile organic compounds (SVOCs) in the on-board test of heavy-duty vehicles is still a blank in the on-board related research, because the existing SVOCs sampling equipment is not suitable for the sampling of high-temperature exhaust gas and the bumpy on-board test environment, and because the input voltage cannot be switched and limited use on some vehicle test platforms

Method used

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  • Gas and solid phase SVOCs synchronous sampling system suitable for vehicle-mounted test of motor vehicle
  • Gas and solid phase SVOCs synchronous sampling system suitable for vehicle-mounted test of motor vehicle

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Embodiment Construction

[0023] see figure 1 , the gas and solid-phase SVOCs synchronous sampling system of this embodiment includes a SVOCs acquisition unit, a pressure sensor 6, a mass flow controller 7 and a vacuum air pump 9 arranged on the sampling pipeline 5 along the intake direction.

[0024] The SVOCs collection unit includes a PM2.5 cutter 1, a filter holder 2 and a PUF sampling tube 4 arranged sequentially on the sampling pipeline along the air intake direction; a sampling membrane 3 is arranged on the filter holder 2; the sampling membrane 3 is used for Solid-phase SVOCs are collected, and PUF sampling tube 4 is used to collect gas-phase SVOCs.

[0025] The pressure sensor 6, the mass flow controller 7 and the temperature controller 10 are all connected to the control host 8;

[0026] The pressure sensor 6 is used to measure the air pressure in the sampling pipeline 5 for system leak detection, so as to avoid the mismatch between the set sampling flow and the actual sampling flow;

[002...

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Abstract

The invention belongs to the technical field of environment monitoring instruments and aims to overcome defects of SVOCs sampling devices in the prior art by providing a gas and solid phase SVOCs synchronous sampling system suitable for vehicle-mounted test of a motor vehicle. The system has advantages of controllable temperature and great anti-shock performance and can adapt sampling of high-temperature exhaust gas and a bumping vehicle-mounted test situation. The system includes: a housing, a control host computer, a power supply unit, and an SVOCs sampling unit and a vacuum gas pump which are successively arranged on a sampling pipeline. The sampling pipeline, the SVOCs sampling unit and the vacuum gas pump are all fixedly arranged in the housing; one end, closed to the SVOCs sampling unit, of the sampling pipeline is a gas inlet end, while one end closed to the vacuum gas pump is a gas outlet end. The sampling system also includes a temperature controller and a damping device, wherein the temperature controller is connected to the control host computer and is used for control the temperature of interior of the SVOCs sampling unit, and the damping device includes a damping boardand a damping spring. The housing is fixedly disposed on the damping board. The damping spring is installed on the lower surface of the damping board.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring instruments, and relates to a gas and solid-phase SVOCs synchronous sampling system suitable for on-board testing of motor vehicles. Background technique [0002] Heavy-duty diesel vehicles are one of the main sources of air pollutants in China. In 2012, the World Health Organization listed the pollutants emitted by diesel vehicles as the highest class I carcinogens. The pollutants emitted by diesel vehicles contain a large amount of solid and gaseous semi-volatile organic compounds (such as polycyclic aromatic hydrocarbons, etc.), which seriously endanger human health. To control emissions from diesel vehicles, emissions testing must first be performed to obtain vehicle emissions characteristics. Among many motor vehicle emission test methods, the vehicle-mounted method is the most popular actual road test method in recent years. This method can not only reflect the emission lev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24G01N33/00G05D23/19
CPCG05D23/19G01N1/2202G01N1/2205G01N1/2247G01N1/2252G01N33/0047G01N33/0073G01N2001/227G01N2001/2264G01N2001/2255
Inventor 吴烨郑轩何立强李振华张少君郝吉明
Owner TSINGHUA UNIV
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