CN115352977A - High-rise elevator operation abnormity alarming method - Google Patents
High-rise elevator operation abnormity alarming method Download PDFInfo
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- CN115352977A CN115352977A CN202211205497.1A CN202211205497A CN115352977A CN 115352977 A CN115352977 A CN 115352977A CN 202211205497 A CN202211205497 A CN 202211205497A CN 115352977 A CN115352977 A CN 115352977A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0012—Devices monitoring the users of the elevator system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
Abstract
The invention discloses a high-rise elevator operation abnormity alarm method, which relates to the technical field of abnormity detection and comprises the following steps: acquiring horizontal direction acceleration deviation values and vertical direction acceleration deviation values of an elevator at a plurality of moments in a time period; acquiring a resultant acceleration deviation value of the elevator at each moment; acquiring a plurality of clusters of the resultant acceleration deviation value in a time period; acquiring a jitter value of the elevator in each clustering time period; acquiring a horizontal influence value of the human body action on the acceleration deviation value in the horizontal direction and a vertical influence value of the acceleration deviation value in the vertical direction in each cluster; acquiring an abnormal value of the elevator in each cluster time period, and judging whether the elevator runs abnormally in each cluster time period; the invention solves the technical problem that the elevator has misjudgment in the alarm process in the related technology.
Description
Technical Field
The invention relates to the technical field of anomaly detection, in particular to a high-rise elevator operation anomaly alarm method.
Background
Nowadays, more and more high-rise buildings are pulled up, and most of the high-rise buildings need to be provided with elevators; in connection with elevator maintenance, special equipment like elevators, according to the relevant regulations, requires maintenance and service by the relevant units once every half month. The maintenance is divided into weekly, quarterly and annual inspections according to a time period, related personnel are required to overhaul equipment in detail each time, major structures and accessories are subjected to professional inspection and evaluation, more detailed inspection and nursing are required after three months of use, and after one year of operation, each part is inspected according to inspection standards and is responsible for the inspection by experienced technicians; because the running environment of the elevator is complex, the flow of people is large, and maintenance personnel are insufficient, the elevator has great hidden danger.
The high-rise elevator has the characteristics of high running speed and large running amplitude of the car, so that the deviation of speed and acceleration is easy to occur in the running process of the high-rise elevator, the running stability of the elevator is reduced, potential safety hazards exist in the elevator, meanwhile, the fault of the high-rise elevator is more serious to the loss of passengers, and abnormal detection and alarm are required to be carried out in the running process of the elevator.
The abnormal detection of the elevator operation in the prior art mainly aims at the stability of the elevator operation, the shake or vibration of the elevator is directly judged according to the magnitude of single acceleration, the shake of the elevator can cause deviation of the acceleration in multiple directions and multiple moments, the shake degree of the elevator cannot be accurately reflected according to the magnitude of the single acceleration, and in addition, the influence of the action amplitude of a human body in an elevator car on the elevator acceleration is not considered in the prior art, so that a lot of misjudgments are caused in the alarm process of the elevator.
Disclosure of Invention
In order to solve the technical problems that deviation of acceleration in multiple directions and multiple moments is not considered in the prior art, influence of action amplitude of a human body on the acceleration of an elevator is not considered, and misjudgment of the elevator in the alarm process is caused. In view of the above, the present invention is achieved by the following technical solutions.
A high-rise elevator operation abnormity warning method comprises the following steps:
acquiring horizontal direction acceleration deviation values and vertical direction acceleration deviation values of an elevator at a plurality of moments in a time period, and acquiring an elevator car video of the elevator in the time period;
acquiring a combined acceleration deviation value of the elevator at each moment according to the horizontal direction acceleration deviation value and the vertical direction acceleration deviation value;
clustering the multiple combined acceleration deviation values according to the magnitude of the combined acceleration deviation values to obtain multiple clusters of the combined acceleration deviation values in the time period;
acquiring a jitter value of the elevator in the clustering time period according to the horizontal direction acceleration deviation value and the vertical direction acceleration deviation value corresponding to each combined acceleration deviation value in the cluster; sequentially acquiring the jitter value of the elevator in each clustering time period;
detecting the motion amplitude of a human body in the elevator car video in each cluster time period by using an optical flow method, and acquiring the entropy value of angular point optical flow information in each cluster time period according to the motion amplitude of the human body; acquiring a horizontal influence value of the human body action on the horizontal direction acceleration deviation value and a vertical influence value of the vertical direction acceleration deviation value in each cluster according to the entropy of the angular point optical flow information;
acquiring an abnormal value of the elevator in each cluster time period according to the horizontal influence value, the vertical influence value and the jitter value corresponding to each cluster; and judging whether the elevator operates abnormally in each clustering time period according to the abnormal value, and sending out early warning alarm when the operation is judged to be abnormal.
Further, in the process of acquiring horizontal direction acceleration deviation values and vertical direction acceleration deviation values of the elevator at a plurality of moments in a time period, the method also comprises the step of only installing a three-axis sensor in the elevator, so that an x axis and a y axis of the three-axis sensor are in the horizontal direction of the operation of the elevator car, and a z axis of the three-axis sensor is in the vertical direction of the horizontal direction of the operation of the elevator car; and acquiring an acceleration deviation value of the elevator in the x-axis direction, an acceleration deviation value in the y-axis direction and an acceleration deviation value in the z-axis direction according to the three-axis sensor.
Further, the horizontal direction acceleration deviation value is an x-axis direction speed deviation value and a y-axis direction speed deviation value of the three-axis sensor; the vertical direction acceleration deviation value is a z-axis direction speed deviation value of the three-axis sensor.
Further, the resultant acceleration deviation value of the elevator at each time instant is determined by:
in the formula (I), the compound is shown in the specification,
is at the same time
The total acceleration deviation values of the elevator in the x-axis direction, the y-axis direction and the z-axis direction at the moment;
is at the same time
The acceleration deviation value of the elevator in the x-axis direction at the moment;
is at the same time
The acceleration deviation value of the elevator in the y-axis direction at the moment;
is at least
And the acceleration deviation value of the elevator in the z-axis direction at the moment.
Further, the process of obtaining a plurality of clusters of the combined acceleration deviation value in the time period is as follows:
acquiring a resultant acceleration deviation value of a first moment and a second moment in the plurality of moments, and acquiring the aggregation degree of the resultant acceleration deviation values of the first moment and the second moment;
setting a threshold value of the aggregation degree, and judging whether the combined acceleration deviation values at the first moment and the second moment belong to the same cluster according to the threshold value and the aggregation degree; when the combined acceleration deviation values at the first moment and the second moment belong to the same cluster, judging whether the combined acceleration deviation value at the third moment belongs to the current cluster according to the cluster degree, when the combined acceleration deviation value at the third moment belongs to the current cluster, continuously judging whether the combined acceleration deviation value at the fourth moment belongs to the current cluster, and sequentially judging whether the combined acceleration deviation values at the other moments belong to the current cluster; when the combined acceleration deviation values at the first moment and the second moment do not belong to the same cluster, the combined acceleration deviation value at the first moment is taken as the first cluster, the combined acceleration deviation value at the second moment is taken as the second cluster, whether the combined acceleration deviation value at the third moment and the combined acceleration deviation value at the second moment belong to the same cluster or not is judged, whether the combined acceleration deviation values at the other moments belong to the second cluster or not is judged in sequence, when the combined acceleration deviation value at one moment does not belong to the second cluster or not is judged, clustering of the second cluster is completed, clustering of the third cluster is started until all the combined acceleration deviation values at each moment are clustered, and a plurality of clusters of the combined acceleration deviation values in the time period are obtained.
Further, the aggregation degree of the combined acceleration deviation values at the first time and the second time is determined by the following formula:
in the formula (I), the compound is shown in the specification,
the degree of aggregation of the combined acceleration deviation values at the first time and the second time；
The total acceleration deviation value at the first moment is obtained;
the combined acceleration deviation value at the second moment;
is the time interval value between the second time and the first time,
which indicates the time of the second moment in time,
indicating a first time instant.
Further, the jitter value of the elevator in each cluster time period is determined by:
in the formula (I), the compound is shown in the specification,
is an elevator at
Jitter values over a number of clustering time periods;
is as follows
In a clustering period
A plurality of x-axis direction velocity offset values;
is as follows
In a clustering period
A y-axis direction velocity deviation value;
is as follows
In a clustering period
A z-axis direction velocity offset value;
is as follows
A total number of resultant acceleration deviation values within a number of clustering time periods;
representing the clustering of acceleration deviation values in the x-axis direction;
representing the clustering of acceleration deviation values in the y-axis direction;
indicating the convergence of acceleration deviation values in the z-axis direction.
Further, the process of acquiring the entropy of the angular point optical flow information in each cluster time period further comprises setting a threshold of the entropy of the angular point optical flow information, and when the entropy of the angular point optical flow information is larger than the threshold of the entropy, acquiring a horizontal influence value and a vertical influence value of the human body action on a horizontal direction acceleration deviation value and a vertical direction acceleration deviation value in each cluster.
Further, the abnormal value of the elevator in each cluster time period is determined by the following formula:
in the formula (I), the compound is shown in the specification,
is as follows
Abnormal values of elevators in a cluster time period;
is as follows
Horizontal influence values of human body actions on the speed deviation value in the x-axis direction in each clustering time period;
is a first
Horizontal influence values of human body actions on the speed deviation value in the y-axis direction in each clustering time period;
is as follows
Vertical influence values of human body actions on speed deviation values in the z-axis direction in each clustering time period;
is as follows
In a clustering period
A plurality of x-axis direction velocity deviation values;
is a first
In a clustering period
A y-axis direction velocity deviation value;
is a first
In a clustering period
A z-axis direction velocity offset value;
representing the aggregative property of the acceleration deviation value in the x-axis direction;
representing the clustering of acceleration deviation values in the y-axis direction;
representing the aggregability of acceleration deviation values in the z-axis direction;
is a first
Total number of resultant acceleration deviation values within the respective cluster time period.
Further, the process of judging whether the elevator runs abnormally in each cluster time period according to the abnormal value also comprises the steps of setting a threshold value of the abnormal value, wherein the threshold value of the abnormal value is 0.8, when the abnormal value is larger than the threshold value of the abnormal value, the elevator runs abnormally in the cluster time period corresponding to the abnormal value, and starting an elevator abnormity alarm system.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a high-rise elevator operation abnormity warning method, which comprises the steps of obtaining horizontal direction acceleration deviation values and vertical direction acceleration deviation values of an elevator at a plurality of moments in a time period; acquiring a resultant acceleration deviation value of the elevator at each moment according to the horizontal direction acceleration deviation value and the vertical direction acceleration deviation value; clustering the multiple combined acceleration deviation values according to the magnitude of the combined acceleration deviation values, and further obtaining the jitter value of the elevator in each clustering time period after multiple clusters of the combined acceleration deviation values in the time period are obtained; the method analyzes the acceleration of the elevator in the horizontal direction and the acceleration of the elevator in the vertical direction when acquiring the jitter value in each clustering time period, the acquired jitter value of the elevator in each clustering time period is more accurate, meanwhile, the method performs clustering of the combined acceleration deviation value in one time period according to the similarity of the combined acceleration deviation value corresponding to each moment in the time period, obtains a plurality of clusters consisting of similar combined acceleration deviation values, and ensures that the elevator performs abnormal segmented alarm for a plurality of times in the time period by acquiring the jitter value of the elevator in each clustering time period.
The method also comprises the steps of detecting the action amplitude of a human body in the elevator car video in each clustering time period by using an optical flow method, and acquiring the entropy value of angular point optical flow information in each clustering time period according to the action amplitude of the human body; acquiring a horizontal influence value of the human body action on the horizontal direction acceleration deviation value and a vertical influence value of the vertical direction acceleration deviation value in each cluster according to the entropy of the angular point optical flow information; the invention considers the influence value of the action amplitude of passengers in the elevator on the horizontal direction acceleration deviation value and the vertical direction acceleration deviation value of the elevator, eliminates the influence of human body action on the abnormal value of the elevator on the basis of the jitter value, can judge the abnormal degree of the elevator in the running process according to the abnormal value of the elevator, and improves the accuracy and the use safety of the abnormal alarm of the elevator.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flow chart of an elevator operation abnormality alarm method provided by an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
The embodiment provides a high-rise elevator operation abnormity warning method, as shown in fig. 1, the warning method comprises the following steps:
s101, acquiring horizontal direction acceleration deviation values and vertical direction acceleration deviation values of the elevator at multiple moments in a time period; acquiring a combined acceleration deviation value of the elevator at each moment according to the horizontal direction acceleration deviation value and the vertical direction acceleration deviation value;
in this embodiment, the process of obtaining the horizontal direction acceleration deviation value and the vertical direction acceleration deviation value of the elevator at a plurality of times in a time period is as follows: installing a three-axis acceleration sensor in the elevator; the x-axis and the y-axis of the three-axis acceleration sensor are in the horizontal direction of the elevator car, and the z-axis of the three-axis acceleration sensor is in the electric stateThe vertical direction of the elevator car; firstly, the acceleration change of the elevator in the uniform deceleration running stage is analyzed, the self acceleration is mainly reflected in the vertical direction when the elevator is accelerated and decelerated, namely the acceleration exists in the z axis, the specific numerical value of the acceleration is set by a dispatching system of the elevator, and meanwhile, the value of the acceleration can change along with the time, so that the elevator is subjected to the acceleration change in the uniform deceleration running stage
The acceleration at the moment is expressed as
The elevator itself is
Acceleration of time of day
Is set to a system value, wherein
Indicating the acceleration at which the speed of the elevator set by the system changes,
which represents the direction of the z-axis,
represent
Time of day;
the acceleration in the x-axis direction detected by the three-axis acceleration sensor of the elevator car is
In which
Indicating an elevator at
Acceleration in the x-axis direction at time; acceleration in the y-axis direction of
In which
Indicating an elevator at
Acceleration in the y-axis direction at the moment; acceleration in the z-axis direction of
In which
Indicating an elevator at
Acceleration in the z-axis direction at the moment; the deviation value of the acceleration of the elevator in the X-axis direction at any moment is regulated to
In which
Indicating an elevator at
Acceleration deviation value in the x-axis direction at the moment; acceleration deviation value in the y-axis direction of
In which
Indicating an elevator at
Acceleration in y-axis direction at timeA deviation value; the z-axis direction acceleration deviation value is
(ii) a Wherein
Indicating an elevator at
Acceleration deviation value in the direction of the z axis at the moment; because the elevator moves in the horizontal direction and is balanced, namely the acceleration of the elevator per se in the directions of the x axis and the y axis is 0; therefore, the method comprises the following steps: the deviation value of the acceleration in the x-axis direction is
(ii) a Wherein
Indicating an elevator at
The acceleration deviation value in the x-axis direction at the moment,
indicating an elevator at
Acceleration in the x-axis direction at time; acceleration deviation value in the y-axis direction of
(ii) a Wherein
Indicating an elevator at
The acceleration deviation value in the y-axis direction at the time,
indicating an elevator at
Acceleration in the y-axis direction at time; the z-axis direction acceleration deviation value is
(ii) a Wherein
Indicating an elevator at
The z-axis direction acceleration deviation value at the time,
indicating an elevator at
The acceleration in the z-axis direction at the time,
for elevators themselves
Acceleration at the moment;
then analyzing the acceleration change of the elevator at a constant speed stage; when the elevator ascends or descends stably, the motion reaches balance, so the acceleration in three directions is 0, the acceleration of the elevator car detected by the sensor is the deviation value of the acceleration, and the deviation value of the acceleration in the x-axis direction is
(ii) a Wherein
Indicating an elevator at
The acceleration deviation value in the x-axis direction at the moment,
indicating an elevator at
Acceleration in the x-axis direction at time; the deviation value of the acceleration in the y-axis direction is
In which
Indicating an elevator at
Acceleration deviation value in the y-axis direction at the moment; the z-axis direction acceleration deviation value is
(ii) a Wherein
Indicating an elevator at
The z-axis direction acceleration deviation value at the time,
indicating an elevator at
Acceleration in the z-axis direction at time;
thereby obtaining the horizontal direction acceleration deviation value and the vertical direction acceleration deviation value of the elevator at any time in a time period; the acceleration deviation value in the horizontal direction is an acceleration deviation value in the x-axis direction and an acceleration deviation value in the y-axis direction, the acceleration deviation value in the vertical direction is an acceleration deviation value in the z-axis direction, and the acceleration deviation value in any one of the directions
Time of day, xThe axial direction acceleration deviation value is
The deviation value of acceleration in the y-axis direction is
The z-axis direction acceleration deviation value is
；
Finally, the deviation value of the acceleration in the direction of the x axis is
The deviation value of the acceleration in the y-axis direction is
And a z-axis direction acceleration deviation value of
Acquiring a resultant acceleration deviation value of the elevator at each moment, wherein the resultant acceleration deviation value is determined by the following formula:
in the formula (I), the compound is shown in the specification,
is an elevator
The resultant acceleration deviation value at the moment;
the elevator is at
The acceleration deviation value in the x-axis direction of the moment;
s102, clustering the multiple combined acceleration deviation values according to the magnitude of the combined acceleration deviation values to obtain multiple clusters of the combined acceleration deviation values in a time period; acquiring a jitter value of the elevator in the clustering time period according to the horizontal direction acceleration deviation value and the vertical direction acceleration deviation value corresponding to each combined acceleration deviation value in the cluster; sequentially acquiring the jitter value of the elevator in each clustering time period; the method comprises the steps of acquiring a plurality of clusters of the combined acceleration deviation values in a time period, namely acquiring the combined acceleration deviation values at a first moment and a second moment in a plurality of moments, and acquiring the aggregation degrees of the combined acceleration deviation values at the first moment and the second moment; the degree of aggregation of the resultant acceleration deviation values is determined by the following equation:
in the formula (I), the compound is shown in the specification,
the aggregation degree of the combined acceleration deviation values at the first time and the second time;
the deviation value of the resultant acceleration at the first moment is taken as a deviation value of the resultant acceleration at the first moment;
the combined acceleration deviation value at the second moment;
is the time interval value between the second time and the first time,
which indicates the time of the second moment in time,
representing a first time instant;
indicating the resultant acceleration deviation value at the first time
At the time interval between the second time and the first time
Internal time-to-time
And the time interval between the second time and the first time
The larger the resultant acceleration deviation value at the first time
To time of day
The smaller the degree of influence of (c);
indicating the resultant acceleration deviation value at the second time
At the time interval between the second time and the first time
Internal time-setting device
The degree of influence of (c);
indicating the resultant acceleration deviation value at the first moment
Combined acceleration deviation value from second time
The aggregability of (a);
setting a first threshold, and judging whether the combined acceleration deviation values at the first moment and the second moment belong to the same cluster according to the threshold and the aggregation degree; when the aggregation degree of the combined acceleration deviation values at the first moment and the second moment is greater than a first threshold value, the combined acceleration deviation values at the first moment and the second moment belong to the same cluster, and the cluster is marked as a first cluster; judging whether the resultant acceleration deviation value at the third moment belongs to the first cluster or not according to the cluster degree, wherein the cluster degree is determined by the following formula:
in the formula (I), the compound is shown in the specification,
the cluster degree of the combined acceleration deviation value at the third moment and the first cluster is obtained;
the resultant acceleration deviation value at the third moment;
the combined acceleration deviation value at the second moment;
the time interval value of the third time and the second time is obtained;
acquiring the total acceleration deviation value of the third moment and the clustering degree of the first cluster for the number of all the moments in the time period from the first moment to the third moment of the first cluster
Time of flight
；
Indicating the resultant acceleration deviation value at the second time
Combined acceleration deviation value from third time
The aggregation of (a) and (b),
the larger the value of (D), the larger the resultant acceleration deviation value at the third time
The greater the degree of aggregation in the first cluster;
indicating the time interval between the third time and the second time
Combined acceleration deviation value at the third time
A relative aggregation density of aggregates in the first cluster;
setting a second threshold value, and when the combined acceleration deviation value at the third moment and the clustering degree of the first cluster
When the acceleration is larger than the second threshold value, the combined acceleration deviation value at the third moment
Aggregating in a first cluster;
then, continuously judging whether the combined acceleration deviation value at the fourth moment belongs to the first cluster or not, and sequentially judging whether the combined acceleration deviation values at the other moments belong to the first cluster or not;
when the combined acceleration deviation values at the first moment and the second moment do not belong to the same cluster, taking the combined acceleration deviation value at the first moment as the first cluster, taking the combined acceleration deviation value at the second moment as the second cluster, judging whether the combined acceleration deviation value at the third moment and the combined acceleration deviation value at the second moment belong to the same cluster, sequentially judging whether the combined acceleration deviation values at the other moments belong to the second cluster, finishing clustering on the second cluster when the combined acceleration deviation value at one moment does not belong to the second cluster, starting to acquire the third cluster until all the combined acceleration deviation values at each moment are clustered, and acquiring a plurality of clusters of the acceleration deviation values in a time period;
acquiring a jitter value of the elevator in the clustering time period according to the horizontal direction acceleration deviation value and the vertical direction acceleration deviation value corresponding to each combined acceleration deviation value in the cluster; sequentially acquiring the jitter value of the elevator in each clustering time period; the jitter value of the elevator in each cluster time period is determined by:
in the formula (I), the compound is shown in the specification,
is an elevator at
Jitter values over a number of clustering time periods;
it should be noted that, according to the implementation conditions of the present example, this exampleIn the embodiment, the first threshold is set to be 3, the second threshold is set to be 2, and an implementer can set other first thresholds and second thresholds according to specific implementation conditions; in determining the first
In a clustering period
Aggregation of individual x-axis direction velocity deviation values
The first step
Within a cluster time period
Aggregations of velocity deviation values in the y-axis direction
And a first
In a clustering period
Aggregative property of velocity deviation value in z-axis direction
In the range of the length r, the value of the length r is 1/4 times
The length of each cluster time period;
s103, obtaining the elevator car video in each cluster time period, and obtaining the entropy value of angular point light flow information in each cluster time period according to the motion amplitude of a human body in the elevator car video in each cluster time period by using a light flow method; acquiring a horizontal influence value of the human body action on the horizontal direction acceleration deviation value and a vertical influence value of the vertical direction acceleration deviation value in each cluster according to the entropy of the angular point optical flow information;
in the embodiment, in the running process of the elevator, because normal movement of personnel exists in the elevator car, the elevator car shakes normally, and at the moment, the shaking of the elevator is also detected through the sensor data of the elevator car, so in order to obtain abnormal shaking of the elevator, the influence of the normal movement of the personnel in the elevator car on the detected shaking needs to be eliminated; for the detected second
Sub-dithering, i.e. corresponding to
The acceleration deviation values of the clusters are judged, and the influence of the normal behavior of the personnel on the acceleration deviation values in the three directions is judged according to the car monitoring video;
firstly, get the first
The cage monitoring video of the time period corresponding to each cluster is used for judging the human body action amplitude by using an optical flow method, namely, the entropy of angular point optical flow information is calculated through the characteristic angular points of the human body, the numerical value of the entropy is normalized, and the entropy of the angular point optical flow information is
The larger the motion amplitude of the human body is, the larger the influence on the deviation value of the acceleration is; the motion amplitude of the human body is obtained by an optical flow method, and because the small-amplitude motion of the human body does not influence the running stability of the elevator in practice, a third threshold value is set according to practical experience
In the scheme, the threshold is 0.4, and the threshold can be adjusted according to scenes in practice, and judgment is carried out at the moment
The corresponding human body action does not influence the deviation of the acceleration of the elevator; then, entropy values of all corner point optical flow information are judged
The influence of the corresponding action on the acceleration deviation value; at the moment, the entropy value of the angular point light stream information is judged
The corresponding human body action influences the acceleration deviation values in the three directions, and the influence degrees of the acceleration deviation values in the x-axis direction, the y-axis direction and the z-axis direction are different due to different action positions in the car, so that the horizontal influence value of the human body action amplitude on the acceleration deviation values in the x-axis direction and the y-axis direction and the vertical influence value of the acceleration deviation value in the z-axis direction are judged according to the human body action amplitude and the position in the car;
for the first
A cluster of
A number of clusters
The time corresponding to each x-axis direction speed deviation value is
Has the first
(ii) a number of clusters
The time corresponding to the speed deviation value in the y-axis direction is
Has the first
(ii) a number of clusters
The time corresponding to the speed deviation value in the z-axis direction is
(ii) a Then the human body acts on
In a cluster
The horizontal influence value of the acceleration deviation value in the x-axis direction is determined by the following formula:
in the formula (I), the compound is shown in the specification,
is a first
In a cluster
Horizontal influence values of the acceleration deviation values in the x-axis direction;
in the same way, the human bodyAction pair is
The horizontal contribution to the acceleration deviation value in the first y-axis direction in the cluster is determined by:
in the formula (I), the compound is shown in the specification,
is as follows
In a cluster
Horizontal influence values of the acceleration deviation values in the y-axis direction;
in the same way, the human body acts on the second
In a cluster
Acceleration deviation value in z-axis directionIs determined by the following equation:
in the formula (I), the compound is shown in the specification,
is as follows
In a cluster
A vertical influence value of the z-axis direction acceleration deviation value;
sequentially obtaining a horizontal influence value of the horizontal direction acceleration deviation value and a vertical influence value of the vertical direction acceleration deviation value in each cluster;
s104, acquiring abnormal values of the elevators in each cluster time period according to the horizontal influence value, the vertical influence value and the jitter value corresponding to each cluster; judging whether the elevator runs abnormally in each clustering time period according to the abnormal value; the abnormal value of the elevator in each cluster time period is determined by the following formula:
in the formula (I), the compound is shown in the specification,
is as follows
Abnormal values of elevators in a cluster time period;
obtaining abnormal values of the elevators in each cluster time period in sequence; each cluster corresponds to an abnormal value of an elevator; setting a fourth threshold value, and judging whether the elevator runs abnormally in each cluster time period according to the abnormal value of the elevator and the magnitude of the fourth threshold value; when the abnormal value of the elevator in a clustering time period is greater than a fourth threshold value, the elevator operates abnormally in the clustering time period, and an elevator abnormal alarm system is started;
it should be noted that, in this embodiment, the fourth threshold is set to be 0.8 according to the implementation conditions, when the abnormal value is greater than 0.8, the elevator operates abnormally in the cluster time period corresponding to the abnormal value, and the elevator abnormal alarm system is started; the implementer may set other values as the fourth threshold according to the implementation conditions.
In summary, the embodiment provides a high-rise elevator operation abnormity warning method, which includes: acquiring horizontal direction acceleration deviation values and vertical direction acceleration deviation values of an elevator at a plurality of moments in a time period, and acquiring an elevator car video of the elevator in the time period; acquiring a combined acceleration deviation value of the elevator at each moment according to the horizontal direction acceleration deviation value and the vertical direction acceleration deviation value; clustering the multiple combined acceleration deviation values according to the magnitude of the combined acceleration deviation values to obtain multiple clusters of the combined acceleration deviation values in a time period; acquiring a jitter value of the elevator in the clustering time period according to the horizontal direction acceleration deviation value and the vertical direction acceleration deviation value corresponding to each combined acceleration deviation value in the cluster; sequentially acquiring the jitter value of the elevator in each clustering time period; detecting the motion amplitude of a human body in the elevator car video in each cluster time period by using an optical flow method, and acquiring the entropy value of angular point optical flow information in each cluster time period according to the motion amplitude of the human body; acquiring a horizontal influence value of the human body action on the horizontal direction acceleration deviation value and a vertical influence value of the vertical direction acceleration deviation value in each cluster according to the entropy of the angular point optical flow information; acquiring an abnormal value of the elevator in each cluster time period according to the horizontal influence value, the vertical influence value and the jitter value corresponding to each cluster; judging whether the elevator runs abnormally in each clustering time period according to the abnormal value; the technical scheme of the invention can solve the technical problem that in the prior art, when the elevator runs, the elevator is misjudged in the alarming process because the deviation of the acceleration in a plurality of directions and moments is not considered and the influence of the action amplitude of a human body on the acceleration of the elevator is not considered.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A high-rise elevator operation abnormity warning method is characterized by comprising the following steps:
acquiring horizontal direction acceleration deviation values and vertical direction acceleration deviation values of an elevator at a plurality of moments in a time period, and acquiring an elevator car video of the elevator in the time period;
acquiring a combined acceleration deviation value of the elevator at each moment according to the horizontal direction acceleration deviation value and the vertical direction acceleration deviation value;
clustering the multiple combined acceleration deviation values according to the magnitude of the combined acceleration deviation values to obtain multiple clusters of the combined acceleration deviation values in the time period;
acquiring a jitter value of the elevator in the clustering time period according to the horizontal direction acceleration deviation value and the vertical direction acceleration deviation value corresponding to each combined acceleration deviation value in the cluster; sequentially acquiring the jitter value of the elevator in each clustering time period;
detecting the motion amplitude of a human body in the elevator car video in each cluster time period by using an optical flow method, and acquiring the entropy value of angular point optical flow information in each cluster time period according to the motion amplitude of the human body; acquiring a horizontal influence value of the human body action on the horizontal direction acceleration deviation value and a vertical influence value of the vertical direction acceleration deviation value in each cluster according to the entropy of the angular point optical flow information;
acquiring an abnormal value of the elevator in each cluster time period according to the horizontal influence value, the vertical influence value and the jitter value corresponding to each cluster; and judging whether the elevator operates abnormally in each clustering time period according to the abnormal value, and sending out early warning alarm when the operation is judged to be abnormal.
2. The method for alarming abnormality in operation of a high-rise elevator according to claim 1, wherein in the process of obtaining the horizontal direction acceleration deviation value and the vertical direction acceleration deviation value of the elevator at a plurality of times within a period of time, the method further comprises installing only a three-axis sensor in the elevator so that the x-axis and the y-axis of the three-axis sensor are in the horizontal direction of the operation of the elevator car and the z-axis of the three-axis sensor is in the vertical direction of the horizontal direction of the operation of the elevator car; and acquiring an acceleration deviation value of the elevator in the x-axis direction, an acceleration deviation value in the y-axis direction and an acceleration deviation value in the z-axis direction according to the three-axis sensor.
3. The high-rise elevator operation abnormality warning method according to claim 2, characterized in that the horizontal direction acceleration deviation value is an x-axis direction speed deviation value and a y-axis direction speed deviation value of the three-axis sensor; the vertical direction acceleration deviation value is a z-axis direction speed deviation value of the three-axis sensor.
4. The high-rise elevator operation abnormality warning method according to claim 3, characterized in that the resultant acceleration deviation value of the elevator at each time is determined by the following equation:
in the formula (I), the compound is shown in the specification,
is at the same time
The total acceleration deviation values of the elevator in the x-axis direction, the y-axis direction and the z-axis direction at the moment;
is at the same time
The acceleration deviation value of the elevator in the x-axis direction at the moment;
is at the same time
The acceleration deviation value of the elevator in the y-axis direction at the moment;
is at the same time
And the acceleration deviation value of the elevator in the z-axis direction at the moment.
5. The method for alarming abnormality in operation of high-rise elevator according to claim 1, wherein the process of obtaining a plurality of clusters of the resultant acceleration deviation values in the time period is:
acquiring a combined acceleration deviation value of a first moment and a second moment in the plurality of moments, and acquiring the aggregation degree of the combined acceleration deviation value of the first moment and the second moment;
setting a threshold value of the aggregation degree, and judging whether the combined acceleration deviation values at the first moment and the second moment belong to the same cluster according to the threshold value and the aggregation degree; when the combined acceleration deviation values at the first moment and the second moment belong to the same cluster, judging whether the combined acceleration deviation value at the third moment belongs to the current cluster according to the cluster degree, when the combined acceleration deviation value at the third moment belongs to the current cluster, continuously judging whether the combined acceleration deviation value at the fourth moment belongs to the current cluster, and sequentially judging whether the combined acceleration deviation values at the other moments belong to the current cluster; when the combined acceleration deviation values at the first moment and the second moment do not belong to the same cluster, the combined acceleration deviation value at the first moment is taken as the first cluster, the combined acceleration deviation value at the second moment is taken as the second cluster, whether the combined acceleration deviation value at the third moment and the combined acceleration deviation value at the second moment belong to the same cluster or not is judged, whether the combined acceleration deviation values at the other moments belong to the second cluster or not is judged in sequence, when the combined acceleration deviation value at one moment does not belong to the second cluster, clustering of the second cluster is completed, clustering of the third cluster is started until all the combined acceleration deviation values at each moment are clustered, and a plurality of clusters of the combined acceleration deviation values in the time period are obtained.
6. The high-rise elevator operation abnormality warning method according to claim 5, characterized in that the degree of aggregation of the resultant acceleration deviation values at the first time and the second time is determined by the following formula:
in the formula (I), the compound is shown in the specification,
the aggregation degree of the combined acceleration deviation values at the first time and the second time;
the deviation value of the resultant acceleration at the first moment is taken as a deviation value of the resultant acceleration at the first moment;
the combined acceleration deviation value at the second moment;
is the time interval value between the second time and the first time,
which indicates the time of the second moment in time,
indicating a first time instant.
7. The high-rise elevator operation abnormality warning method according to claim 1, characterized in that the jitter value of the elevator in each cluster time period is determined by the following formula:
in the formula (I), the compound is shown in the specification,
for elevators at first
Jitter values over a number of clustering time periods;
is as follows
In a clustering period
A plurality of x-axis direction velocity deviation values;
is as follows
Within a cluster time period
A y-axis direction velocity deviation value;
is as follows
In a clustering period
A z-axis direction velocity offset value;
is as follows
A total number of resultant acceleration deviation values within a number of clustering time periods;
representing the clustering of acceleration deviation values in the x-axis direction;
representing the clustering of acceleration deviation values in the y-axis direction;
indicating the convergence of acceleration deviation values in the z-axis direction.
8. The method for alarming operation abnormality of a high-rise elevator according to claim 1, wherein the process of obtaining the entropy of angular point optical flow information in each cluster time period further includes setting a threshold value of the entropy of the angular point optical flow information, and when the entropy of the angular point optical flow information is larger than the threshold value of the entropy, obtaining a horizontal influence value and a vertical influence value of a human body action on a horizontal direction acceleration deviation value and a vertical direction acceleration deviation value in each cluster.
9. The high-rise elevator operation abnormality warning method according to claim 1, characterized in that the abnormality value of the elevator in each cluster time period is determined by the following formula:
in the formula (I), the compound is shown in the specification,
is as follows
Abnormal values of elevators in a cluster time period;
is as follows
Horizontal influence values of human body actions on the speed deviation value in the x-axis direction in each clustering time period;
is a first
Horizontal influence values of human body actions on the speed deviation value in the y-axis direction in each clustering time period;
is a first
Human body action pair z-axis direction speed deviation in a cluster time periodVertical influence from value;
is as follows
In a clustering period
A plurality of x-axis direction velocity deviation values;
is as follows
In a clustering period
A y-axis direction velocity offset value;
is as follows
Within a cluster time period
A z-axis direction velocity offset value;
representing the clustering of acceleration deviation values in the x-axis direction;
representing the clustering of acceleration deviation values in the y-axis direction;
representing the aggregability of acceleration deviation values in the z-axis direction;
is as follows
A total number of resultant acceleration deviation values within the respective cluster time period.
10. The method of claim 9, wherein the determining whether the elevator is abnormally operated in each cluster time period according to the abnormal value further comprises setting a threshold of the abnormal value, wherein the threshold of the abnormal value is 0.8, and when the abnormal value is greater than the threshold of the abnormal value, the elevator is abnormally operated in the cluster time period corresponding to the abnormal value, and starting an elevator abnormal alarm system.
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