Non-contact type breath detecting device

The invention discloses a non-contact type breath detecting device. The non-contact type breath detecting device comprises a light emitting module, a light receiving module, an image acquisition module and a data processor and can be used for detecting breath of a human body. In use, light is emitted by the light emitting module and irradiates the chest or the abdomen of the human body, the light irradiates the light receiving module after being reflected out, the reflected light changes along with the movement, caused by breathing, of the chest or the abdomen, and accordingly the positions of light spots displayed on the light receiving module change. By acquiring, processing and analyzing an image of the light spots, the position change information of the light spots is automatically extracted, and a breathing signal of the human body can be obtained. By means of the device, the movement, slightly representing the breath of the human body, of the chest or the abdomen can be amplified, and therefore the breathing signal detection accuracy is improved; meanwhile, the non-contact type breath detecting mode can also avoid the discomfort, caused by breath detection, of a detected person.