Monitoring system and its control method

A method for controlling a monitoring system for monitoring a status of a monitoring object apparatus,

• the monitoring system including:
• a sensor terminal that is driven by a battery and acquires a measured value or measured values of a measuring apparatus mounted in the monitoring object apparatus by executing image analysis processing on a captured image obtained by photographing the measuring apparatus;
• and
• a manager terminal that monitors the measured value of the measuring apparatus which is reported from the sensor terminal,
• the monitoring system control method comprising:
• a first step executed, when the measured value of the measuring apparatus is out of a normal range, by the manager terminal requesting transmission of image data of an image area which is necessary and sufficient to check whether the measured value of the measuring apparatus is actually out of the normal range or not in the captured image from the sensor terminal by designating a range and resolution of the image area;
• and
• a second step executed by the sensor terminal transmitting the requested image data of the image area in the captured image with the requested resolution to the manger terminal in response to the request from the manager terminal,
• wherein a plurality of transfer patterns that are transfer formats of the image data including an image size and resolution of the image area regarding which transfer of the image data to the sensor terminal is requested are set in advance;
• wherein a priority is set to each of the transfer patterns;
• and
• wherein the manager terminal regularly or irregularly acquires remaining time of the battery for the sensor terminal and a communication speed of a communication path to the sensor terminal;
• and
• wherein in the first step, the manager terminal requests, on the basis of the remaining time of the battery and the communication speed which have been acquired, and the image size of the image area which is defined by each of the transfer patterns, that the sensor terminal should transmit the image data of the image area with the image size and the resolution that are defined by the transfer pattern with the priority which is the highest among the transfer patterns capable of transferring the image data of the image area within the remaining time of the battery.