Method for improving accuracy of UWB ranging in firearm off-location alarm system

Abstract

A method for improving the accuracy of UWB ranging in a firearm off-location alarm system is disclosed. The method comprises: a UWB module installed on a beacon in a firearm sends a ranging request pulse signal to a sentry box base station at a first moment, and a UWB module of the sentry box base station receives the request pulse signal at a second moment, and sends a response signal to the beacon at a third moment, the UWB module of the beacon receives the response signal at a fourth moment, and sends an end signal at a fifth moment, and the sentry box base station UWB module receives the end signal at a six moment; two-way flight time of the pulse signal between the beacon and the sentry box base station is calculated based on the first moment, the second moment, the third moment, thefourth moment, the fifth moment, and the sixth moment, so that the UWB ranging information is determined, wherein the UWB ranging information is about a distance from the beacon to the sentry box basestation; and filtering treatment is performed on the UWB ranging information data by adaptively selecting a corresponding parameter configuration based on multiple groups of different parameter configurations.

Description

technical field [0001] The invention relates to a method for improving UWB (Ultra Wideband, ultra-wideband) ranging accuracy, in particular to a method for improving the UWB ranging accuracy in a gun off-position alarm system. Background technique [0002] In recent years, there have been several cases of snatching and theft of military and police guns and ammunition on duty in various countries, which has brought harm to the personal safety of the people and social stability. On-site management of guns and off-site alarms have become problems that governments of all countries need to solve. Accurately displaying the current position of the gun on duty from the sentry box, quickly and accurately alarming when the gun is out of position, knowing the dynamic information and abnormal situation of the gun in real time and responding quickly have become an important application field of ranging technology. [0003] At present, RFID, a common ranging technology, has related paten...

AI Technical Summary

Problems solved by technology

However, in non-line-of-sight environments such as human body and object occlusion, wireless signals are received through multiple channels, and multipath effects will cause a series of problems such as delay synchronization, signal attenuation, polarization changes, and link instability. , thereby reducing the accuracy to a certain extent and generating ranging errors, so mature and stable algorithms and system-level solutions are required to ensure ranging accuracy

[0005] Moreover, the ranging frequency required in practical applications is low, and the ranging data is irregular, and the data changes and interference of each ranging are random, so commonly used FIR filters, IIR filters, Kalman filters, etc. It is difficult to design parameters for a single digital filter, and cannot adapt to different ranging environments. Too complex data calculations will also increase the computing load of the single-chip microcomputer, slow down the data processing rate, and reduce the real-time performance of the system. Therefore, it is necessary to use low computational complexity and strong adaptability. Advanced filtering algorithm and high real-time data processing flow to ensure system performance and improve ranging accuracy

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