Aged people trail anomaly detection anti-lost method based on grid partitioning

A grid division and anti-lost technology, which is applied to location-based services, measurement devices, branch equipment, etc., can solve problems such as inability to change, cumbersome operations, and frequent false positives.

Active Publication Date: 2018-07-06
XIDIAN UNIV
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Problems solved by technology

This kind of system is static and cannot change with the activity habits of the elderly. If the activity range of the elderly needs to be changed, the family needs to manually set the activity range, which is cumbersome to operate and frequent false alarms

Method used

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  • Aged people trail anomaly detection anti-lost method based on grid partitioning
  • Aged people trail anomaly detection anti-lost method based on grid partitioning
  • Aged people trail anomaly detection anti-lost method based on grid partitioning

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Embodiment Construction

[0029] The present invention is further described below in conjunction with accompanying drawing.

[0030] like figure 1 As shown, a grid division-based detection and anti-lost method for the abnormal trajectory of the elderly includes the following steps:

[0031] 1) Mesh division

[0032] Set a parameter D, here take the length of D as 100 meters, divide the whole map into a grid matrix of D×D, where the unit of D is the length unit meter, for the convenience of later mapping, convert the length unit into the latitude and longitude of the earth, Convert the side length D of the square to a surface on the sphere. Since the size of the divided grid is very small compared to the earth, the scale is at the level of hundreds of meters, so the four sides of the surface quadrilateral are approximately equal, so here only need to calculate α and β, and the calculation formula is as follows:

[0033]

[0034]

[0035] Among them, R is the radius of the earth, D is the length...

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Abstract

The invention discloses an aged people trail anomaly detection anti-lost method based on mesh generation, firstly, a map is partitioned into a grid matrix, namely, a parameter D is set, the map is partitioned into a DxD square grid; then, aiming at trail data uploaded by an aged people falling alarm, after de-noising processing is executed, the trail data are mapped to the corresponding grid, andwhether the aged people is in the historical activity grid within time T is judged, if so, the T is refreshed, and trail data streams are processed right along, and if not, alarming information is pushed to family members through an APP, and whether the aged people gets lost is judged by the family members; and if the aged people really gets lost, a position of the aged people is navigated, and ifthe aged people is not lost, the T is refreshed, the grid where the aged people passes by during such stage is added in the historical activity grid, when the aged people is in the grid again next time, alarming cannot be triggered, and data stream information is processed and estimated right along. Such mode mainly has the following three advantages: firstly, a safe activity range can be delineated automatically through historical trails; secondly, the safe activity range can be adjusted dynamically according to system operation; and thirdly, the method has real-time performance, the trail of the aged people can be monitored in real time, and the method can give an alarm to the family members for abnormal trails in real time.

Description

technical field [0001] The invention belongs to the technical field of pedestrian track inspection, and in particular relates to a grid division-based method for detecting abnormal tracks of elderly people and preventing them from getting lost. Background technique [0002] The memory of the elderly is gradually declining, especially some elderly people suffer from Alzheimer's disease, senile dementia, and amnesia, which leads to the situation that the elderly get lost from time to time. [0003] The original technical means is to pre-set the range of activities of an old man through the family, monitor the position of the old man in real time through the GPS positioning system on the old man, and report to the police when the range is exceeded. This kind of system is static and cannot change with the activity habits of the elderly. If the activity range of the elderly needs to be changed, the family needs to manually set the activity range, which is cumbersome to operate an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W4/021G01S19/42H04M1/725H04M1/72403
CPCH04W4/021G01S19/42H04M1/72403H04M1/72457
Inventor 杨刚高玉龙
Owner XIDIAN UNIV
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