Wind tunnel test system of dust sensor

The invention relates to a wind tunnel test system for a dust sensor, which comprises a dust drying device, a speed adjustable dust feed device connected with a dust output port of the dust drying device, and a dust wind tunnel. The dust wind tunnel comprises a wind inlet, a test section and a wind outlet; a dust output end of the speed adjustable dust feed device is arranged on the wind inlet of the dust wind tunnel; a dust sensor and a dust sampler are arranged in the test section of the dust wind tunnel parallelly; the wind outlet of the dust wind tunnel is connected with a dust removal device and a residual dust emission device in sequence; the dust sensor is connected with a dust concentration display device which displays a dust concentration value; dust sampled by the dust sampler is weighed through a dust weighing device to obtain the dust weight acquired in unit time; then, a corresponding dust concentration value can be calculated; and finally, the dust concentration value is compared with the dust concentration value displayed on the dust concentration display device, and a measurement error of the dust sensor can be calculated, thereby providing basis for trial manufacture, production and maintenance of the dust sensor.