Detection method and detection device for conversion ratio of nitrogen oxide detector of diesel vehicle
A technology of nitrogen oxides and detection devices, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of no clear and reliable detection method for conversion rate, no reference for conversion rate detection, cumbersome operation steps, etc., and achieve good traceability High reliability, good on-site operability, and simple detection process
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[0024] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0025] Diesel vehicle nitrogen oxide detector conversion rate detection device, such as figure 1 As shown, it includes gas source, gas circuit switching module, flow monitoring module, and host computer control software. The gas source consists of 4 bottles of NO standard gas (10-13) with gradient concentration, 4 bottles of NO with gradient concentration 2 Composed of standard gas (14-17) and 1 bottle of high-purity nitrogen (18), of which (19) is a backup gas source. Standard gas and nitrogen are respectively connected to the inlet port of the gas circuit switching module through the pressure reducing valve. The gas circuit switching module includes ten gas circuit switching channels, and controls the on and off of ten two normally closed solenoid valves (20-29) through serial port communication, so as to realize the switchin...
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