Object motion monitoring method based on vector operation

Abstract

The invention discloses an object motion monitoring method based on vector operation. The method comprises the following steps: S1, generating and transmitting a constant-amplitude dual-tone signal; S2, acquiring two reference vector echo signals; S3, acquiring two target vector echo signals; S4, performing corresponding subtraction on the two target vector echo signals and the two reference vector echo signals to obtain two change values; S5, obtaining the ratio of the moduli of the two change values; S6, acquiring the displacement of the measured object at the moment m; S7, obtaining the difference of the phase delay amount of the received dual-tone signal between the two frequencies; and S8, obtaining the distance between the measured object and the vector signal source at the m moment. According to the invention, the motion of the object is monitored by measuring the amplitude and the phase of the dual-tone signal, various problems encountered in a Doppler frequency measurement method are overcome, and various object motions including the change of the internal state of the object can be monitored.

Description

technical field [0001] The invention relates to the field of object motion monitoring, in particular to an object motion monitoring method based on vector calculation. Background technique [0002] The monitoring of object movement has important applications in military detection, security monitoring, environmental monitoring and other fields. In the field of military detection, the monitoring technology of object movement is the key technology to distinguish the echoes of fixed ground objects and the echoes of moving targets such as aircraft, tanks, and personnel. In the field of safety monitoring, the monitoring technology of the movement of dams and bridges is the key to grasp the health status of dams and bridges; the monitoring of vehicle speed is an important technology to ensure traffic safety in daily life. In the field of environmental monitoring, by monitoring the state changes inside the mountain, it is possible to monitor the possibility of landslides, thereby r...

AI Technical Summary

Problems solved by technology

Compared with the GPS positioning monitoring technology, the Doppler frequency measurement method has the advantages of being able to realize long-distance wireless detection, and has a wide detection range and penetrability, and does not need to install additional monitoring instruments for the measured object. The disadvantage is that it cannot Realize real-time monitoring of low-speed targets and transient targets

The GPS positioning monitoring method makes up for the defects of the Doppler frequency measurement method, but it needs to install additional monitoring equipment on the monitored object, the data volume is large, it is easily affected by the environment, and it is impossible to monitor the internal changes of the object.

Images