US Patent No. 9,185,365

APPARATUS AND METHOD FOR CONTROLLING SENSOR NODE USING VIBRATION SENSOR AND MAGNETIC SENSOR


Patent No. 9,185,365
Issue Date November 10, 2015
Title Apparatus And Method For Controlling Sensor Node Using Vibration Sensor And Magnetic Sensor
Inventorship Sang Gi Hong, Daejeon (KR)
Nae Soo Kim, Daejeon (KR)
Yong Hyun Kim, Seoul (KR)
Noh Bok Lee, Seoul (KR)
Assignee ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR) AGENCY...

Claim of US Patent No. 9,185,365

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.