Abstract: The present invention discloses a method and a system for building a human fall detection model. The method can include: collecting the speed information of one and more human fall samples in the human fall process; the speed information includes resultant acceleration, speed and time; analyzing the characteristics of the speed information, calculating and extracting low acceleration threshold value a0, resultant acceleration series within fixed time I0, high acceleration threshold value a1, curve area threshold value ?S and low acceleration time threshold value ?T, and building the fall detection mechanism. The system of the present invention fully takes into account the characteristics of human body's movement behaviors, so as to increase the detection rate and reduce the misjudgment rate.

Abstract: The present disclosure provides a method and a system for wirelessly and passively measuring temperature and devices forming the system. The method includes: receiving an energy feedback radio frequency (RF) signal by a temperature measuring end; converting the energy feedback RF signal into electric energy and storing the electric energy; and starting the temperature measuring end after obtaining the electric energy, and transmitting a RF signal under the current temperature to a terminal, and calculating the current temperature through the terminal. The method, the system and the devices forming the system provided in the present disclosure are capable of activating the crystal oscillator or the ceramic oscillator wirelessly and passively, therefore, the method, the system and the devices can be used to wirelessly and passively measure temperature, which is convenient.

Abstract: The present disclosure provides a method and a system for wirelessly and passively measuring temperature and devices forming the system. The method includes: receiving an energy feedback radio frequency (RF) signal by a temperature measuring end; converting the energy feedback RF signal into electric energy and storing the electric energy; and starting the temperature measuring end after obtaining the electric energy, and transmitting a RF signal under the current temperature to a terminal, and calculating the current temperature through the terminal. The method, the system and the devices forming the system provided in the present disclosure are capable of activating the crystal oscillator or the ceramic oscillator wirelessly and passively, therefore, the method, the system and the devices can be used to wirelessly and passively measure temperature, which is convenient.

Abstract: The present invention discloses a method and an apparatus for precisely perceiving an indoor activity. The method may include: receiving a vibration signal on a floor by using multiple vibration sensors disposed according to a preset rule; and determining a location of a vibration source according to a phase difference of a vibration signal of the same vibration source in different vibration sensors. The monitoring performed on the indoor activity in the present invention can be performed without disturbing the monitored person, and can resolve the concern about leakage of privacy of the monitored person.

Abstract: The present invention discloses an eye motion sensing method, a flexible contact body, an external sensing coil, and a system. The method may include: sensing an eye motion by using a servo motion signal of a permanent magnet implanted into a flexible contact body; applying at least four coils disposed externally on a same plane, and monitoring a servo motion of the permanent magnet according to an electromotive force in the coils; and converting the electromotive force to restore an eye motion signal. The present invention can use the sensing coils distributed around an eyepit to detect the electromotive force generated when the eye motion leads to the servo motion of the flexible contact body, and analyze the electromotive force. Accordingly, the eye motion triggered by a perceptual task can be analyzed objectively.

Abstract: A human body tumbling detection method and device and a mobile terminal system are disclosed. The method may include: when detecting that resultant acceleration of a human body is less than a low acceleration threshold a0, capturing a resultant acceleration sequence I0 within fixed time; in a two-dimensional coordinate system using resultant acceleration and time as coordinate axes and a0 as a reference line, calculating a curve area above the reference line and a curve area below the reference line that are enclosed by curves in I0 coordinates and the reference line; and when a difference between the curve area above the reference line and the curve area below the reference line is less than a curve area threshold ?S, and time occupied by resultant acceleration below the reference line is greater than a low acceleration time threshold ?T, determining that the human body tumbles.