Personnel entering and leaving management system and boundary crossing judgment method thereof

Abstract

The invention discloses a personnel entering and leaving management system and a boundary crossing judgment method thereof, and belongs to the field of communication. The personnel entering and leaving management system comprises a UWB anchor point and multiple tags to be located which can perform data communication with the UWB anchor point. The UWB anchor point is connected with a first antenna which is used for being arranged at the internal side of the door and a second antenna which is used for being arranged at the external side of the door. The first antenna and the second antenna are symmetrically arranged at the internal and external sides of the door. The advantages of the personnel entering and leaving management system and the boundary crossing judgment method thereof are that only the UWB anchor point having double antennas is required so that equipment cost is low; the system is not influenced by the environment so that the locating accuracy is high; debugging of the signal range is not required so that the debugging work amount is low; and the extensibility of the arrangement position is high and construction is easy and convenient. Besides, the system has high locating accuracy so that the system has the characteristics of being low in equipment cost, low in debugging work amount, easy and convenient to construct and high in locating accuracy in comparison with the systems in the prior art.

Description

technical field [0001] The invention relates to the communication field, in particular to a personnel entry and exit management system and a method for judging boundary crossing thereof. Background technique [0002] With the gradual improvement of the intelligent management system and the continuous updating of information facilities, the ability of security prevention and control has been greatly enhanced. For example, schools, prisons, government departments, archives, large factories and intelligent communities have the ability to manage the entry and exit of personnel. greater demand. [0003] In the prior art, radio frequency technology RFID is usually used to realize the management of personnel in and out. Among them, one technical solution uses active RFID products. , received signal strength indication) positioning technology to achieve regional positioning, the disadvantages of this method are: ①The field strength has a strong dependence on the environment, and th...

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Problems solved by technology

[0003] In the prior art, radio frequency technology RFID is usually used to realize the management of personnel in and out. Among them, one technical solution uses active RFID products. , received signal strength indication) positioning technology to achieve regional positioning, the disadvantages of this method are: ①The field strength has a strong dependence on the environment, and the field strength value is easy to change with the environment, which leads to inaccurate positioning; ②When installing and debugging, the requirements for the installation position and installation angle of the antenna are relatively high, and the signal range needs to be debugged. The parameters of the debugging are different in different use environments, and there is no unified standard, which greatly increases the amount of engineering. Conducive to market promotion. For the school gate plan, the gate size of each school is different, so each school's project needs to be debugged

In order not to block the signal, the antenna is generally installed on the door frame, which will make it difficult to debug the signal when the height of the door frame is greater than the width of the door. It must be larger than the width of the door frame, so that there are many overlapping areas of antenna signals inside and outside the door, and the positioning position in the overlapping area will switch back and forth between the inside and outside of the door, resulting in misjudgment. If the signal is not fully covered, there will be signal blind spots. It will not be able to correctly interpret the entry and exit doors, and misjudgments will also occur.

[0004] Another technical solution using RFID technology in the prior art uses semi-active RFID products. Semi-active RFID products are triggered by a low-frequency 125KHZ frequency, allowing microwave 2.4GHz to take advantage, of which 2.4GHz is used for wireless data transmission. 125KHz is used for positioning to achieve regional positioning. The disadvantage of this method is: due to the short communication distance of 125KHz, only a few meters, the requirements for the installation location are relatively high. Currently, it is generally installed on the ground or on the roof. For the sake of aesthetics, the antenna needs to be buried underground, which not only attenuates the communication distance, but also increases the amount of engineering. Some grounds are not easy to dig, which greatly limits the application environment.

[0005] In addition to the above-mentioned RFID technology, there are existing technologies that use GPS positioning technology to realize the management of personnel in and out. The positioning accuracy of GPS signals is relatively low and can only reach the meter level, which cannot meet the needs of high-precision positioning.

[0006] Among the above technical solutions, the first technical solution has the disadvantages of poor stability and poor reproducibility, which leads to a large amount of debugging engineering; the second technical solution depends on the construction environment and requires a large amount of construction work; the third technical solution has low positioning accuracy

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