Electronic nose used for detecting insect pest information

The utility model discloses an electronic nose used for detecting insect pest information, comprising a system for collecting and controlling mixed smell of insect and plant, a signal regulating unit, a data collecting card and a computer; the mixed smell collecting and controlling system is connected with the data collecting card by the signal regulating unit; and the data collecting card is respectively and electrically connected with the computer and a first electromagnetic valve, a second electromagnetic valve and an air pump in the system for collecting and controlling the mixed smell of the insect and the plant. When in working, the computer opens the air pump and pumps the mixed smell of the insect and the plant into a sensor reaction chamber, the smell is converted into electric signals by a gas sensor array, subsequently the electric signals are transmitted to the computer by the data collecting card so that the analyzing, processing and judging of the insect pest situation are carried out, and after the collecting time is passed, the fresh air is pumped in the electronic nose so that the smell molecule on the gas sensor array is removed, thus facilitating the next collecting. The electronic nose can find the insect pest situation of the plant in time, and can collect and analyze the smell of different insects by changing the sensors in the gas sensor array.