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Behavior state detection device and method

A state detection and behavior technology, applied in measurement devices, radio wave measurement systems, radio wave reflection/re-radiation, etc. The effect of high practicality

Pending Publication Date: 2019-01-18
CHENGDU TECHCAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first type of solution is based on the camera system, which has high requirements for light and is not very practical
The second type of solution needs to wear relevant sensors with you, which is not convenient for the elderly to use, and will often fail to monitor normally due to forgetting or losing

Method used

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  • Behavior state detection device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1, take a UWB (ultra-wideband) wireless radar sensor installed indoors as an example as a communication module: fix the behavior state detection device 10 on the indoor wall at a height of more than 2m, and adjust its transmitting antenna to the indoor activity area. The transmitting signal can be used in the 3G frequency band, the bandwidth is 2GHz, and the transmitting end continuously and repeatedly transmits the same IR signal.

[0067] When the human body moves normally, the reflected signal received by the receiving unit 300 will change regularly, but when the person falls down, the change of its movement mode will cause the reflected signal received by it to reflect a unique change, that is, short-term Generate a jump in the vertical direction. What needs to be explained here is that the jump means that, compared with the two waves, the rate of change in the vertical direction is very high, exceeding a certain threshold. Therefore, it can be judged th...

Embodiment 2

[0069] Embodiment 2, take a UWB (ultra-wideband) wireless radar sensor installed indoors as an example as a communication module: fix the behavior state detection device 10 on the indoor wall at a height of more than 2m, and adjust its antenna to the indoor activity area. The transmitting signal can be used in the 3G frequency band, the bandwidth is 2GHz, and the transmitting end continuously and repeatedly transmits the same IR signal.

[0070] The movable range of the human body is marked on the indoor layout, and the area where large pieces of furniture and other objects are located is marked as the non-movable range. This information is input into the system as a priori information for subsequent judgments on falls.

[0071] When the human body moves, the wireless reflection signal is subjected to FFT calculation, and at the same time, the human body coordinates are obtained in real time by using the prior information of the human body's moving range, and are sent to the pr...

Embodiment 3

[0076] Embodiment 3, the human body sleep monitoring method: the radio electromagnetic wave signal is reflected on the human body, when the person exhales or inhales, the surface of the human body is moving in a small distance, the reflected radio signal in these two cases is due to the change of the distance , showing a periodic phase change. The phase of the reflected signal can be analyzed at the receiving end to detect the breathing cycle, thereby judging the breathing frequency and counting it. At the same time, the physiological phenomenon of the heartbeat causes small, synchronized movements in the body as the ventricles periodically compress to push blood through the body. This small movement is reflected in the reflected signal as a small fluctuation in phase, which is relative to the periodic variation caused by respiration. Analysis of this tiny fluctuation can determine the period of the heartbeat or the count of completed heartbeats.

[0077] After receiving the...

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Abstract

Embodiments of the invention provide a behavior detection device and method, and relate to the field of wireless signal processing. The device comprises a communication module and a processor. The communication module comprises a receiving unit, a transmitting unit and a processing unit. The transmitting unit is used for transmitting a wireless electromagnetic wave; the receiving unit is used forreceiving a reflected wave of the wireless electromagnetic wave; and the processing unit is used for carrying out frequency mixing processing on the wireless electromagnetic wave and the reflected wave to generate an intermediate frequency signal. The processor is used for processing the intermediate frequency signal to obtain behavior state information of a target object in a room. The wireless electromagnetic wave is transmitted and received through the communication module; the transmitted and received wireless electromagnetic wave is subjected to frequency mixing processing to obtain the intermediate frequency signal; and the intermediate frequency signal and the transmitted and received wireless electromagnetic wave are analyzed to obtain the behavior state information of the target object. The device also can be used in a dark environment or an environment with poor light without enabling the target object to wear an instrument, so that the practicality is higher.

Description

technical field [0001] The invention relates to the technical field of intelligent monitoring, in particular to a device and method for behavior state detection. Background technique [0002] When people who need care, such as sick people, elderly people or children, move indoors, there are often situations where there is no caregiver to manage them. Therefore, it is necessary to design a device to monitor the behavior status of the above-mentioned people when they are moving indoors, and provide auxiliary information for nursing patients or the elderly. [0003] There are two main types of existing technologies. The first type is a common camera system (optical and infrared somatosensory), which can use a single system to realize the above-mentioned composite functions. The object to be measured is placed in front of the lens and camera. The normal operation of the system requires an external light source. The computer processes the data collected by the image acquisition ...

Claims

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Application Information

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IPC IPC(8): G01S13/88
CPCG01S13/88
Inventor 尹宇芳张慧洁崔州平陈应松荣功杰李治强
Owner CHENGDU TECHCAL UNIV
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