10 results about "Compass" patented technology

The invention provides an anti-theft method based on a compass short message function. The anti-theft method based on the compass short message function comprises the following steps: arranging an alarm information receiving address in advance; collecting gesture data of a target device in real time; judging whether a carrier is in a static state according to acceleration data, when the carrier is not in the static state, judging whether the acceleration data and replacement exceed preset values, when the acceleration data and the replacement exceed the preset values, judging that the target device is stolen, and retransmitting alarm information to the alarm information receiving address through a compass communication satellite or a mobile network. The invention further provides an anti-theft system based on the compass short message function. The anti-theft system based on the compass short message function comprises a compass receiving and transmission terminal, a gesture sensor and a controller. The controller is used for storing the preset alarm information receiving address, and judging whether the target device is stolen. The compass receiving and transmission terminal is used for retransmitting the alarm information through the compass communication satellite. The gesture sensor contains compass navigation location, and is used for collecting the gesture data of the target device. The anti-theft method based on the compass short message function and the anti-theft system based on the compass short message function are capable of timely carrying out effective alarms.

The invention provides a cleaning robot with map construction and navigation. The cleaning robot includes a control unit, a sensor unit, a movement and driving unit, a cleaning unit, a frame unit anda power charging and supplying unit. The sensor unit includes a cliff sensor, a wall-by-wall sensor, an IMU inertial measurement sensor, an electronic compass sensor, an odometer sensor, a collision sensor, an ultrasonic sensor and single-point distance measurement sensors. One or more single-point distance measurement sensors are arranged on the edge of the cleaning robot, when the cleaning robotmoves in an environment, the single-point distance measurement sensor can achieve the construction of a length of environmental map, the information in one or more sensors such as the IMU inertial measurement sensor, the electronic compass sensor and the odometer sensor is combined, multi-sensor data fusion is achieved, and the cleaning robot moves in the environment so that high-precision construction and navigation of the entire map can be achieved.

The invention provides a horizontal effective ground stress testing device which comprises a multi-light ruler phase laser range finder, a three-dimensional electronic compass, a data storage unit, atransparent protective cover, a drilling machine, a drill stem and a drill bit, wherein the multi-light ruler phase laser range finder, the three-dimensional electronic compass and the data storage unit are arranged on an outer wall of the drill stem; the multi-light ruler phase laser range finder and the three-dimensional electronic compass are horizontally mounted; both the multi-light ruler phase laser range finder and the three-dimensional electronic compass are connected with the data storage unit by virtue of data lines; the transparent protective cover is positioned on an outer wall ofthe drill stem and covers the multi-light ruler phase laser range finder, the three-dimensional electronic compass and the data storage unit; the drill bit is connected with the drilling machine by virtue of the drill stem. The invention further provides a horizontal effective ground stress testing method considering a drilling fluid pressure. According to the method, the horizontal effective ground stress testing accuracy can be improved, the testing operation is simplified, the testing success rate is improved, and the testing cost is reduced.

The invention provides a pair of compasses with protractors. The half protractors capable of being joined into a whole protractor are arranged on two gauge bars of the compasses. During use, the two gauge bars can be joined, the half protractors can be combined into a whole for use, and therefore the compasses have complete use functions and are more convenient to use.