The invention provides a building structure detection method based on WiFi, and belongs to the technical field of building detection. According to the method, existing WiFi
signal transmitting and receiving equipment is arranged and installed in a building (including a house, a tunnel, an underground project and the like) or utilized, and propagation characteristic changes, such as changes of parameters such as
signal strength,
wavelength, frequency, phase and the like, of WiFi signals in the structure are monitored in real time. The characteristics of attenuation, reflection,
multipath effect and the like of signals are utilized, an advanced
signal processing algorithm is combined, damage, hidden defects and the like of the structure are analyzed, and the structural health state of the
civil engineering building is obtained. Compared with a traditional sensor monitoring technology, the method has the advantages of being low in cost, free of invasion and easy to deploy, is suitable for a large-scale and multi-point distributed monitoring environment, remarkably improves the monitoring and detection efficiency of structural damage of buildings, underground
engineering and other buildings and structures, and solves the problems that an existing method is high in cost, complex in deployment, poor in adaptability and the like.