Near infrared household food detection device and method

The invention discloses a near infrared household food detection device and method, and belongs to a food detection device and method by utilizing optical absorption characteristics of organic ingredients of food in a near infrared spectrum area. According to the device, near infrared rays emitted by a near infrared light emitting diode are collimated and emitted in parallel through a collimator objective and are converged to a detector through a focusing lens; a sample rack is arranged above a middle position between an optical filter and the detector; the detector is provided with an interface connected with a computer. The method comprises the following steps: adjusting the position of the near infrared light emitting diode, so that the emitted near infrared rays are received by the detector; suspending a sample to be detected on the sample rack; arranging the optical filter, so as to obtain a detection result of the sample to be detected under a particular wavelength; finally, analyzing the detection result according to the conventional technology, so as to obtain a detection conclusion. A filtering effect is improved, the device has a detection function under different wavelengths, and the influence of a container loading the sample to be detected on a measurement result is avoided. In addition, the device has high upgradeability and high extensibility.