Wireless signal monitoring method in private network field

A wireless signal monitoring method in a private network field, the wireless signal monitoring method comprising steps of:

• (S1) establishing a private network field comprising at least one wireless base station, at least one wireless terminal device, a control center and an mobile image pickup device, wherein each of the at least one wireless base station is equipped with an antenna, each of the at least one wireless base station is dispersedly installed in the private network field, each of the at least one wireless terminal device is within a transmission range of a wireless signal from the antenna of the corresponding wireless base station, the at least one wireless base station and the corresponding wireless terminal device are uniquely paired with each other, the mobile image pickup device has a photographing function and a wireless signal transmission function, and the at least one wireless base station and the at least one wireless terminal device are in communication with the control center;
• (S2) performing a flow test on the at least one wireless terminal device to confirm that a wireless connection quality of the at least one wireless terminal device is normal;
• (S3) the control center driving the mobile image pickup device to periodically move to at least one preset position and take at least one initial area photo at each time, wherein the at least one initial area photo is transmitted from the mobile image pickup device to the control center via wireless transmission, wherein an arrangement of all objects in the private network field at an initial time is established according to the at least one initial area photo;
• (S4) the control center periodically receiving a wireless signal report from the at least one wireless terminal device, and periodically analyzing a strength of the wireless signal from the at least one wireless terminal device according to the wireless signal report;
• (S5) the control center judging whether the strength of the wireless signal from any of the at least one wireless terminal device is lower than a threshold value, wherein if a judging condition of the step (S5) is not satisfied, the step (S4) is performed again;
• and
• (S6) if a judging result of the step (S5) indicates that the strength of the wireless signal from a specified wireless terminal device of the at least one wireless terminal device is lower than the threshold value, the control center driving the mobile image pickup device to move to the preset position corresponding to the specified wireless terminal device to capture at least one current area photo, wherein after the control centers receives the at least one current area photo from the mobile image pickup device, the control center judges whether an abnormal condition is generated according to a comparing result of an image feature of the at least one initial area photo and an image feature of the at least one current area photo taken at a same position.