Handheld type heavy vehicle NOX rapidly detecting device

Abstract

The invention discloses a handheld type heavy vehicle NOX rapidly detecting device. The handheld type heavy vehicle NOX rapidly detecting device is mainly composed of a gas collecting module, an NDUV(non-dispersive ultraviolet) gas analyzing module, a signal processing module, a storage module, a man-machine interacting module and a battery module, wherein the NDUV gas analyzing module, serving as a central unit, adopts NDUV testing principles to avoid interference of H2O and CO2, allows differentiation according to differences on an absorption spectrum and outputs NO and NO2 measured valuessimultaneously, thereby being high in degree of integration and applicable to being manufactured into a handheld type detecting device. Therefore, the handheld type heavy vehicle NOX rapidly detectingdevice has the advantages of being small in size, light in weight, convenient to carry, simple in operation, rapid in response, capable of rapidly detecting the total mass of NO, NO2 and NOX and thelike.

Description

technical field [0001] The present invention relates to vehicle NO X In the field of detection technology, more specifically, it relates to a heavy-duty vehicle NO X Rapid handheld detection device. Background technique [0002] At present, with the rapid increase in the number of motor vehicles, motor vehicle exhaust pollution has become an important source of air pollution in my country. Motor vehicle exhaust pollution not only affects the environment, but also directly affects human health. X significantly higher than that of light-duty vehicles, therefore, heavy-duty vehicles NO X The control of vehicle exhaust emissions is currently the focus of regulation. NO from heavy vehicles X Among them, NO accounts for about 90%, NO 2 It is only a small part of it, but NO discharged into the atmosphere will be gradually oxidized into extremely harmful NO 2 . [0003] Although, most heavy vehicles are equipped with NO X sensor, but NO X The sensor cannot differentiate bet...

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Problems solved by technology

[0003] Although, most heavy vehicles are equipped with NO X sensor, but NO X The sensor cannot differentiate between NO and NO 2 , can simultaneously measure NO and NO 2 The methods include non-dispersive ultraviolet analysis method (NDUV), non-dispersive infrared analysis method (NDIR) and chemiluminescence method (CLD), among which the NDIR method needs to remove the NO in the exhaust 2 It can be reduced to NO, but the reduction efficiency can only reach 90%, and if the temperature is not controlled within the appropriate range, NO 2 will convert to N 2 , Infrared gas analysis will also be affected by H 2 O and CO 2 interference, because NO 2 There is a serious overlap between the infrared absorption spectrum and the absorption spectrum of water; the CLD method is for the separate measurement of NO and NO 2 To be equipped with two detection chambers, pure oxygen is required for the operation of the ozone generator during use, which increases the cost, energy consumption and volume, which is not conducive to the realization of lightweight and hand-held requirements

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