Memory, Bluetooth intelligent terminal, distance calculating method and door opening control method

Abstract

The invention relates to a memory, a bluetooth intelligent terminal, a distance calculating method and a door opening control method. The distance calculating method comprises the following steps of receiving a bluetooth broadcast signal which is sent by bluetooth access control equipment through a broadcast channel by the bluetooth intelligent terminal; according to the received bluetooth broadcast signal, sending a connection establishment request to the bluetooth access control equipment, receiving a connection establishment response sent by the bluetooth access control equipment so as to establish a data channel, and receiving a bluetooth data signal sent by the bluetooth access control equipment through the data channel; caching a signal intensity value of the bluetooth broadcast signal and a signal intensity value of a bluetooth data signal sequentially; opening a slide window, acquiring a preset quantity of latest signal intensity values in the slide window, and calculating a mean value of the preset quantity of the signal intensity values; and according to the mean value, calculating a distance value of the bluetooth intelligent terminal and the bluetooth access control equipment. By using the technical scheme, when a user walks, a calculated distance value is accurate.

Description

technical field [0001] The invention relates to the field of smart communities, in particular to a memory, a Bluetooth smart terminal, a distance calculation method and a door opening control method. Background technique [0002] With the improvement of modern people's living standards and the development of communities, people have higher and higher demands on living conditions, and community safety precautions have also attracted more and more attention. With the rapid development of digital technology and network technology, access control technology has also developed rapidly. It has already surpassed the simple doorway and key management, and gradually developed into a complete set of access management system, which has become a solution to the security management of important department entrances and exits. effective measures. [0003] Since Bluetooth transmission enables short-range reading of signals, access control management systems are increasingly using Bluetoot...

AI Technical Summary

Problems solved by technology

[0004] At present, when the Bluetooth smart terminal controls the Bluetooth access control device to open the door, it usually directly compares the signal strength value of the signal received from the Bluetooth access control device with the threshold value. , antenna, etc., will make the obtained signal strength fluctuate greatly, generally up to 30dB. Therefore, the error of this door opening control method is extremely large, and the door often opens too early or too late. very bad

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