CN-224203416-U - Wireless sensing system

Abstract

The application discloses a wireless sensing system which is used for expanding a wireless sensing range and improving the detection reliability of a sensing target. The wireless sensing system comprises a transmitting end, a receiving end and a signal scattering device, wherein the transmitting end is used for transmitting signals, the receiving end is used for receiving the signals, and the signal scattering device is positioned between the transmitting end or the receiving end and used for scattering electromagnetic waves of the signals transmitted between the transmitting end and the receiving end in the transmission process.

Inventors

• JIANG LITENG
• MENG JIN
• HAN YA
• WANG MINGHUI
• WANG ZHONG
• HE BO
• WANG CONG
• Du long

Assignees

• 浙江大华技术股份有限公司

Dates

Publication Date

20260505

Application Date

20250421

Claims (10)

1. 1. A wireless sensing system is characterized by comprising a transmitting end, a receiving end and a signal scattering device, wherein, The transmitting end is used for transmitting signals; the receiving end is used for receiving signals; The signal scattering device is positioned between the transmitting end and the receiving end and is used for scattering electromagnetic waves of signals transmitted between the transmitting end and the receiving end in the transmission process.
2. 2. The system of claim 1, wherein the transmitting end, the receiving end, and the signal scattering device are located on a same line.
3. 3. The system of claim 1, wherein the material of the signal scattering device comprises glass and/or metal.
4. 4. The system of claim 1, wherein the signal scattering device is a cylinder having an elliptical or circular cross-section.
5. 5. The system of claim 4, wherein the height of the post is 0.5-3 times the height of the antenna at the transmitting end or the receiving end.
6. 6. The system of claim 1, wherein the signal scattering device has a dimension of 5 mm-5 cm in a direction of a line connecting the transmitting end and the receiving end.
7. 7. The system of claim 6, wherein the signal scattering device has a dimension of 3mm to 6.5cm in a direction perpendicular to the connection line.
8. 8. The system of claim 6, wherein the signal scattering device has a dimension perpendicular to the connection line that is 1.5-4 times a predetermined distance between a center point of the signal scattering device and a center point of the transmitting end or the receiving end.
9. 9. The system of claim 1, wherein the surface of the signal scattering device is a reconfigurable intelligent surface RIS.
10. 10. The system of claim 1, wherein the signal scattering device has a dielectric constant of 3-10.

Description

Wireless sensing system Technical Field The application relates to the technical field of communication, in particular to a wireless sensing system. Background Wireless sensing technology utilizes wireless signals (e.g., wiFi, bluetooth, etc.) to detect and understand the surrounding environment. This technique is based mainly on the scattering, reflection, diffraction, attenuation, etc. characteristics of the wireless signal. When the transmitting end transmits the wireless signal to the space, if a person exists or moves on the electromagnetic wave propagation path before the transmitting end arrives at the receiving end, the transmission of the electromagnetic wave by the human body can be influenced, so that the signal state of the electromagnetic wave is changed, namely the state of a wireless channel is changed. Disclosure of utility model The embodiment of the application provides a wireless sensing system which is used for expanding the wireless sensing range of the wireless sensing system and improving the detection reliability of a sensing target. The wireless sensing system provided by the embodiment of the application comprises a transmitting end, a receiving end and a signal scattering device, wherein, The transmitting end is used for transmitting signals; the receiving end is used for receiving signals; The signal scattering device is positioned between the transmitting end and the receiving end and is used for scattering electromagnetic waves of signals transmitted between the transmitting end and the receiving end in the transmission process. In the wireless sensing system provided by the embodiment of the application, through the signal scattering device arranged between the transmitting end of the signal and the receiving end of the signal, the electromagnetic wave of the signal transmitted between the transmitting end and the receiving end is scattered in the transmission process, so that on one hand, the signal energy on the LOS path is weakened, namely the electromagnetic wave intensity on the LOS path is reduced, thereby balancing the energy distribution on the LOS path and the NLOS path, increasing the proportion of the signal on the NLOS path in the whole signal received by the receiving device, further increasing the CSI change proportion caused by the activities of sensing targets such as personnel on the NLOS path, on the other hand, the signal scattering device scatters the electromagnetic wave of the LOS path to the NLOS path, thereby also increasing the electromagnetic wave intensity on the NLOS path, further increasing the reflected wave intensity caused by the activities of sensing targets such as personnel on the NLOS path, namely further increasing the CSI change proportion caused by the activities of the sensing targets such as personnel on the NLOS path, finally achieving the effects of expanding the wireless sensing range of the wireless sensing system and improving the detection reliability of the sensing targets. In some embodiments, the transmitting end, the receiving end, and the signal scattering device are located on the same line. In some embodiments, the material of the signal scattering device comprises glass and/or metal. In some embodiments, the signal scattering device is a cylinder with an elliptical or circular cross-section. In some embodiments, the height of the pillar is 0.5-3 times the height of the antenna at the transmitting end or the receiving end. In some embodiments, the size of the signal scattering device in the connection line direction between the transmitting end and the receiving end is 5 mm-5 cm. In some embodiments, the signal scattering device has a dimension of 3 mm-6.5 cm in a direction perpendicular to the connection line. In some embodiments, the size of the signal scattering device in the direction perpendicular to the connection line is 1.5-4 times of a preset distance, where the preset distance is a distance between a center point of the signal scattering device and a center point of the transmitting end or the receiving end. In some embodiments, the surface of the signal scattering device is a reconfigurable intelligent surface RIS. In some embodiments, the dielectric constant of the signal scattering device is 3-10. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Fig. 1 is a schematic structural diagram of a wireless sensing system according to an embodiment of the present application; Fig. 2 is a schematic signal radiation diagram of a transmitting end of a signal according to an embodiment of the present application; fig. 3 is