Patent ID: 9185365
Filing Date: 2015-11-10
Classification: H04N

Abstract:
1. An apparatus for controlling a sensor node, the apparatus comprising: a calculator to calculate an azimuth angle and a slope of the sensor node, based on magnetic values measured by a 2-axis magnetic sensor and vibration values measured by a 3-axis acceleration sensor, at least one of a direction and an angle of the sensor node being controlled based on the calculated azimuth angle and the slope; a sensor controller to control selective filtering of the magnetic values and the vibration values and selective amplification of the filtered magnetic values and the filtered vibration values, when the azimuth angle and the slope are calculated; a first offset switch which receives at least one of the magnetic values measured by the 2-axis magnetic sensor and the vibration values measured by the-axis acceleration sensor, from the 2-axis magnetic sensor and the 3-axis acceleration sensor, respectively; a second offset switch which outputs, according to a first connection, at least one of magnetic values and vibration values received by the first offset switch to the calculator, or, according to a second connection, outputs at least one of filtered and amplified magnetic values and filtered and amplified vibration values to a detector; and the detector to detect a target relative to the sensor node based on filtered and amplified magnetic values and filtered and amplified vibration values which are output by the second offset switch, wherein the sensor controller determines whether or not to have the magnetic values and the vibration values received by the first offset switch to be filtered and amplified, and based on the determination selectively controls the first and second offset switches to be connected according to one of the first connection and the second connection, wherein in the first connection the first and second offset switches are directly connected to one another such that at least one of the magnetic values and the vibration values measured by the 2-axis magnetic sensor and 3-axis acceleration sensor, respectively, pass through the first offset switch directly to the second offset switch, and in the second connection the first and second offset switches are indirectly connected to one another, such that at least one of the magnetic values and the vibration values measured by the 2-axis magnetic sensor and 3-axis acceleration sensor, respectively, pass through the first offset switch to a filter-amplifier and the second offset switch outputs at least one of filtered and amplified magnetic values and filtered and amplified vibration values to the detector.