Monitoring device and method for settlement of transmission tower

A method for monitoring a settlement of a transmission tower, comprising:

• installing a monitoring device for the settlement of the transmission tower on a tower leg of the transmission tower in an untilted state to enable a measurement direction of a laser ranging sensor in the monitoring device to be parallel to a direction of a ridge of the transmission tower and directed to ground, wherein the monitoring device comprises the laser ranging sensor, an acceleration sensor, a central processing module, a battery, and a fixing plate;
• wherein the laser ranging sensor is configured to measure a distance between an installation position of the monitoring device and the ground;
• the acceleration sensor is configured to measure an inclination angle of a tower leg of the transmission tower;
• the central processing module is configured to determine a settlement value of the transmission tower based on measurement data of the laser ranging sensor and measurement data of the acceleration sensor;
• in response to the transmission tower being in the untilted state, acquiring a distance L between the monitoring device and a top point of the transmission tower, a horizontal shift R between the monitoring device and the top point of the transmission tower, an initial height h of the monitoring device from the ground, and an initial distance m between the installation position of the monitoring device and the ground;
• wherein in a case where a plurality of monitoring devices are provided, rear extension lines of measurement directions of laser ranging sensors of the plurality of monitoring devices respectively installed at four tower legs of the transmission tower converge at the top point A of the transmission tower;
• an x axis of the acceleration sensor and a y axis of the acceleration sensor are horizontally oriented toward an exterior side of the transmission tower and are perpendicular to each other;
• and a z axis of the transmission tower in the untilted state is perpendicular to the ground;
• in a case where the transmission tower is tilted, determining whether the inclination angle α is greater than 0 according to an acceleration component on the x axis of the acceleration sensor, an acceleration component on the y axis of the acceleration sensor and a value output by an angle meter of the acceleration sensor;
• wherein α greater than 0 represents that a tower body at the monitoring device is tilted outwardly, and α less than 0 represents that a tower body at the monitoring device is tilted inwardly;
• calculating, according to the distance L, the horizontal shift R, the initial height h, the inclination angle α and the distance m, a height h′ of the monitoring device from the ground based on a principle of similar triangles, wherein the monitoring device is located at a position where the tower body is tilted outwardly in a case where the transmission tower is in a current tilted state;
• and
• comparing and calculating a difference between the height h′ of the monitoring device from the ground and the initial height h of the monitoring device from the ground, and using the difference as the settlement value of the transmission tower.