CN110626901B - Equipment operation process segmentation system - Google Patents
Equipment operation process segmentation system Download PDFInfo
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- CN110626901B CN110626901B CN201910897472.4A CN201910897472A CN110626901B CN 110626901 B CN110626901 B CN 110626901B CN 201910897472 A CN201910897472 A CN 201910897472A CN 110626901 B CN110626901 B CN 110626901B
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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
- B66B5/0037—Performance analysers
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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
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Abstract
The invention discloses a device operation process segmentation system, which comprises an acceleration acquisition module, an acceleration data area forming module and an acceleration segmentation module, wherein the acceleration acquisition module is used for acquiring an acceleration data area; the acceleration acquisition module is used for acquiring acceleration data of the equipment running in a set direction; the acceleration data area forming module is used for acquiring acceleration data of one operation action according to the acceleration data acquired in the set direction and forming an acceleration data area corresponding to the operation action; the acceleration segmentation module is used for dividing an acceleration data area of an action into a plurality of segments according to the acceleration data in the acceleration data area of the action; the acceleration segmentation module comprises a segmentation node generation unit and a segmentation forming unit. The equipment operation process segmentation system provided by the invention can analyze the equipment operation process according to the acceleration data in the equipment operation process to obtain each stage of equipment operation and the acceleration data of each stage.
Description
Technical Field
The invention belongs to the technical field of automation equipment, relates to an equipment operation analysis system, and particularly relates to an equipment operation process segmentation system.
Background
The elevator is the most common vertical transportation vehicle in modern high-rise buildings, saves time and physical strength of people and provides convenience for daily life. As a special device closely related to the life safety of the public, the safe operation of the elevator is receiving more and more attention from the society. However, because the elevator has a complex structure, the need to ensure safe and reliable operation of the elevator and detect the operation state and fault condition of the elevator become urgent needs for elevator management, maintenance and safe operation.
According to the statistics of the information network of the Chinese industry, China is the largest elevator country of production and consumer in the world and is also the largest elevator exit country. 81 ten thousands of newly-added elevators in 2017 in China, and the national elevator holding amount is 562.7 ten thousands.
The elevator industry in China has been developed for 70 years and is quite large at present. In the future, the whole industry will present the following development trends:
(1) domestic elevators will gradually expand the market share; (2) the elevator maintenance and repair market will be gradually standardized and expanded; (3) the elevator supervision will be intelligent.
At present, some enterprises in China develop a plurality of remote monitoring systems, and property, elevator operation companies and government departments can remotely monitor the state of an elevator in real time, find abnormal conditions and can acquire related information in time; however, since these systems are based on wireless network bases such as GPRS/GSM or 3G/4G, the following disadvantages are present:
a. the real-time running information of the elevator collected by the system is transmitted through wireless communication networks such as mobile, communication or telecommunication, so that the data flow is quite large, and in addition, the charging of a wireless network operator is based on the flow, so that the operation cost of the elevator remote monitoring system is high, and 24-hour uninterrupted monitoring cannot be realized.
b. The elevator fault early warning system has simple functions, has no database management function, can only carry out simple elevator running state monitoring, has no maintenance quality management monitoring function, and cannot carry out early warning of elevator faults.
c. The system compatibility is poor, the control can be only carried out on a few elevator types, the elevator faults cannot be accurately analyzed and judged, and specific fault positions of the elevator cannot be accurately given.
The existing monitoring mode generally knows the condition in the elevator by a camera arranged in the elevator or by receiving an alarm signal sent in the elevator; elevator faults cannot be predicted.
In view of the above, nowadays, there is an urgent need to design a new abnormality identification method for elevator and other equipment, so as to overcome the above-mentioned defects existing in the existing monitoring method for elevator and other equipment.
Disclosure of Invention
The invention provides a device operation process segmentation system, which can analyze the device operation process according to acceleration data in the device operation process to obtain each stage of device operation and the acceleration data of each stage; so that the different characteristics of each stage can be followed for identification and judgment.
In order to solve the technical problem, according to one aspect of the present invention, the following technical solutions are adopted:
an apparatus operational process segmentation system, the apparatus operational process segmentation system comprising:
the acceleration acquisition module is used for acquiring acceleration data of the equipment running in a set direction;
the acceleration data area forming module is used for acquiring acceleration data of one operation action according to the acceleration data acquired in the set direction and forming an acceleration data area corresponding to the operation action;
the acceleration segmentation module is used for dividing an acceleration data area of an action into a plurality of segments according to the acceleration data in the acceleration data area of the action; the acceleration segmentation module comprises:
a segment node generating unit configured to acquire, as a segment region, a region in the acceleration data region in which a rate of change of the acceleration is lower than a set value, and generate one or two segment nodes in one segment region; two end points of an acceleration data area of one action are also respectively used as segmentation nodes;
-a segment forming unit for forming a plurality of segments by using the area between adjacent segment nodes as a segment according to the obtained plurality of segment nodes.
As an embodiment of the present invention, the segmentation node generation unit generates two segmentation nodes in one segmentation region in such a manner that the segmentation nodes are generated at both ends of the segmentation region, respectively.
As an embodiment of the present invention, the acceleration segmentation module further includes a data smoothing unit, which uses low-pass filtering to smooth the data and eliminate fluctuation of the collected acceleration data.
As an embodiment of the present invention, the segmented node generating unit acquires a peak and a trough in an acceleration signal curve in an acceleration data region; simultaneously acquiring acceleration data sections with acceleration data smaller than a set threshold in the acceleration data area, wherein one acceleration data section is used as a segmented node;
each peak, each valley and each acceleration data section of the acquired acceleration signal are taken as segmented nodes, and data between adjacent nodes is taken as segmented data of the acceleration data.
As an embodiment of the present invention, the acceleration segmentation module includes an apparatus on-off gate area search submodule, and the apparatus on-off gate area search submodule includes:
the door-closing combination acquiring subunit is used for finding out wave crests and wave troughs in all acceleration signal curves of the setting shaft, finding out wave crests and wave troughs of which the distances between the wave crests and the wave troughs are smaller than a set number of sampling points, taking the corresponding wave crests, wave troughs and acceleration signals between the wave crests and the wave troughs as partial data in a door-opening or door-closing combination at one time, and taking the partial data as a first batch of acceleration signals; the combination of the door opening is wave crest-wave trough or wave trough-wave crest, and the combination of the door closing is wave trough-wave crest or wave crest-wave trough;
the temporary switch door area forming subunit is used for calculating a median y of signal values of the first batch of acceleration signals, the median y is used as a third standard line, the value of the first standard line parallel to a time axis is y + c, the value of the second standard line is y + d, the value of the fourth standard line is y-d, the value of the fifth standard line is y-c, and the first standard line and the fifth standard line are used for filtering extreme points; determining the starting point of a wave crest through a second standard line, taking N points forward as a door opening starting point, determining the end point of a wave trough through a fourth standard line, and taking M points backward as a door closing end point; the area from the door opening starting point to the door closing end point is a temporary door opening and closing area; the N points comprise signal values in a short time before the door is opened, and the M points comprise signal points in a short time after the door is closed; wherein c and d are set to 1.
As an embodiment of the present invention, the device gate opening and closing area searching sub-module further includes a real gate opening and closing area sub-unit, configured to merge temporary gate opening areas obtained by all the temporary gate opening and closing area forming sub-units, where the temporary gate opening and closing areas are overlapped or too close in interval, so as to obtain a real gate opening and closing area.
As an embodiment of the present invention, the acceleration segmentation module includes an equipment door opening and closing operation process segmentation sub-module, and the equipment door opening and closing operation process segmentation sub-module includes:
the first acceleration acquisition subunit is used for calculating the acceleration of each point in the door opening and closing operation area of the equipment;
the first regional section acquisition subunit is used for identifying and calculating all regional sections with jerk values smaller than a set value on a time axis to obtain a plurality of regional sections, and comprises the following steps: the system comprises a gantry crane starting area, a plurality of acceleration change interval areas and a gantry crane stopping area; the acceleration change interval areas at least comprise a first acceleration change interval area and a second acceleration change interval area, and intersection points are formed between curves between the first acceleration change interval area and the second acceleration change interval area and an acceleration median line;
and the first curve segmentation subunit is used for dividing the whole operation curve into a plurality of segments according to the gantry crane starting area, the gantry crane stopping area, the plurality of jerk change interval areas and the intersection point obtained by the area segment acquisition subunit.
As an embodiment of the present invention, the acceleration segmentation module includes an equipment uplink and downlink area search submodule, where the equipment uplink and downlink area search submodule includes:
the standard line generating subunit is used for finding a median x1 corresponding to the acceleration data segment data as a third standard line in the acceleration curve graph, wherein x1+ e is a second standard line, and x1+ f is a first standard line; wherein e and f are set values;
a peak and trough occurrence judging subunit, configured to judge whether at least one set point that is continuous occurs between the first standard line and the second standard line, if yes, a peak or a trough is considered to occur at this point, and note that a first point of the continuous segment is a, and a last point is B;
a peak and trough position obtaining subunit, configured to obtain a position of a peak or a trough; calculating corresponding slopes kA and kB of A, B, calculating d by using the similarity kA ═ data [ A ] -x1)/d and kB ═ x1-data [ B ])/d, and obtaining that the peak or trough should start from the first point before the A point and end at the second point after the B point; wherein data [ A ] represents the data value of point A, and d represents the number of points that are a distance from A, B; kA. kB is obtained by dividing the difference between the forward or backward ith point value of the point A and the point B and the point A and the point B by i, wherein i is a set value;
the wave crest and trough combination subunit is used for determining that the two wave crests belong to two single uplink and downlink operation curves if two adjacent wave crests in the same direction appear after all the wave crests and the wave troughs are obtained; if the number of the middle points of the continuous section is larger than two sections of wave crests of the stable data section with a set threshold value, the wave crests of one continuous data section are determined to belong to two single uplink and downlink operation curves, and the adjacent wave crests and the wave troughs which are positioned behind the continuous data section are combined.
As an embodiment of the present invention, the acceleration segmentation module includes an equipment uplink and downlink operation process segmentation submodule, and the equipment uplink and downlink operation process segmentation submodule includes:
the second acceleration acquisition subunit is used for calculating the acceleration of each point of the corresponding area in one uplink or downlink operation action;
the second regional section acquisition subunit is used for identifying and calculating all regional sections with acceleration values smaller than a set value on a time axis of an acceleration curve corresponding to an operation action, and filtering the start and stop regional sections to obtain 3 regional sections which are respectively a uniform acceleration section, a uniform velocity section and a uniform deceleration section;
the second curve segmentation subunit is used for dividing the whole segment region into 7 segments according to the region segment obtained by the second region segment acquisition subunit, and the 7 segments are an acceleration increasing segment, a uniform acceleration increasing segment, an acceleration reducing segment, a uniform speed segment, an acceleration and deceleration segment, a uniform deceleration segment and a deceleration reducing segment; the acceleration section is an acceleration time period in which acceleration is increased, the deceleration section is an acceleration time period in which acceleration is decreased, the uniform acceleration section is an acceleration time period in which acceleration is not changed, the acceleration section is a deceleration time period in which acceleration is increased, and the deceleration section is a deceleration time period in which acceleration is decreased.
The invention has the beneficial effects that: the equipment operation process segmentation system provided by the invention can analyze the equipment operation process according to the acceleration data in the equipment operation process to obtain each stage of equipment operation and the acceleration data of each stage; so that the different characteristics of each stage can be followed for identification and judgment.
The system can be used for judging the abnormal operation of equipment, can acquire the acceleration data of the equipment (such as an elevator) according to the operation condition of the equipment, and can judge whether the equipment (such as the elevator) operates in an abnormal condition (such as the time for opening and closing the door is prolonged because the door is blocked by foreign matters) according to the acceleration data.
Drawings
FIG. 1 is a schematic diagram of a system for segmenting the operation process of a device according to an embodiment of the present invention.
Fig. 2 is a flowchart of a device operation process segmentation method according to an embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating the components of the device door opening and closing area searching submodule according to an embodiment of the present invention.
Fig. 4 is a schematic composition diagram of a sub-module for segmenting the door opening and closing operation process of the device according to an embodiment of the present invention.
Fig. 5 is a schematic diagram illustrating the composition of the uplink and downlink area searching sub-module of the device according to an embodiment of the present invention.
Fig. 6 is a schematic composition diagram of a segmentation submodule in an uplink and downlink operation process of a device in an embodiment of the present invention.
Fig. 7 is a schematic diagram of acceleration curves and standard lines in the uplink and downlink process of an elevator in an embodiment of the invention.
Fig. 8 is a sectional view of the acceleration curve during the door opening and closing process of the elevator according to an embodiment of the present invention.
Fig. 9 is a schematic diagram of the velocity and acceleration curves of the elevator in the ascending and descending process in one embodiment of the invention.
Fig. 10 is a graph showing the velocity and acceleration curves during the opening and closing of an elevator door according to an embodiment of the present invention.
FIG. 11 is a sectional view of a door opening area according to an embodiment of the present invention.
Fig. 12 is a schematic diagram of uplink region segmentation according to an embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
The description in this section is for several exemplary embodiments only, and the present invention is not limited only to the scope of the embodiments described. It is within the scope of the present disclosure and protection that the same or similar prior art means and some features of the embodiments may be interchanged.
In the specification, an "operation action" refers to an action in the operation process of the device, such as an ascending or descending action, a door opening action or a door closing action, or a door opening and closing action.
The invention discloses a device operation process segmentation system, and FIG. 1 is a schematic composition diagram of the device operation process segmentation system according to an embodiment of the invention; referring to fig. 1, in an embodiment of the present invention, the system for segmenting the operation process of the device includes: the device comprises an acceleration acquisition module 1, an acceleration data area forming module 2 and an acceleration segmentation module 3.
The acceleration acquisition module 1 is used for acquiring acceleration data of the equipment running in a set direction. The acceleration data area forming module 2 is configured to obtain acceleration data of one of the operation actions according to the acceleration data collected in the set direction, and form an acceleration data area corresponding to the operation action. The acceleration segmentation module 3 is used for dividing an acceleration data area of an action into a plurality of segments according to the acceleration data in the acceleration data area of the action.
FIG. 2 is a flow chart of a method for segmenting the operation of a device according to an embodiment of the present invention; referring to fig. 2, in an embodiment of the present invention, the method for segmenting the device operation process of the device operation process segmentation system includes:
and 3, dividing the acceleration data area of one action into a plurality of sections according to the acceleration data in the acceleration data area of one action. The method specifically comprises the following steps: acquiring an area with the acceleration change speed lower than a set value in an acceleration data area as a segmentation area, and generating one or two segmentation nodes in one segmentation area; two end points of an acceleration data area of one action are also respectively used as segmentation nodes; and according to the obtained plurality of segmentation nodes, taking the area between the adjacent segmentation nodes as a segmentation so as to form a plurality of segments.
In an embodiment of the present invention, the acceleration segmentation module 3 includes: a segment node generating unit and a segment forming unit. The segmentation node generation unit is used for acquiring an area with the acceleration change rate lower than a set value in the acceleration data area as a segmentation area and generating one or two segmentation nodes in one segmentation area; the two end points of the acceleration data area of one motion also serve as segmentation nodes respectively. The segmentation forming unit is used for taking the area between the adjacent segmentation nodes as a segment according to the obtained segmentation nodes so as to form a plurality of segments.
In an embodiment of the present invention, the manner in which the segmentation node generation unit generates two segmentation nodes in one segmentation region is that segmentation nodes are generated at two ends of the segmentation region respectively. In another embodiment of the present invention, the segmentation node generation unit generates one segmentation node in one segmentation region in such a manner that a segmentation node is generated in the middle of a segment.
In an embodiment of the present invention, the segment node generating unit obtains a peak and a trough in an acceleration signal curve in an acceleration data region; simultaneously acquiring acceleration data sections with acceleration data smaller than a set threshold in the acceleration data area, wherein one acceleration data section is used as a segmented node; each peak, each valley and each acceleration data section of the acquired acceleration signal are taken as segmented nodes, and data between adjacent nodes is taken as segmented data of the acceleration data.
In an embodiment of the invention, the acceleration segmentation module further includes a data smoothing unit, which uses low-pass filtering to smooth the data and eliminate fluctuation of the collected acceleration data.
Fig. 10 is a schematic view of the velocity and acceleration curves during the opening and closing of the door of an elevator in accordance with an embodiment of the present invention; referring to fig. 10, in an embodiment of the present invention, the speed and acceleration during the door opening and closing process are shown in fig. 10.
FIG. 3 is a schematic diagram illustrating the components of the device door opening and closing area search submodule according to an embodiment of the present invention; referring to fig. 3, in an embodiment of the present invention, the acceleration segmentation module 3 includes an apparatus on-off gate area searching submodule 31, where the apparatus on-off gate area searching submodule 31 includes: a door closing combination acquiring subunit 311 and a temporary door opening and closing area forming subunit 312.
The door-closing combination obtaining subunit 311 is configured to find peaks and troughs in all acceleration signal curves of the setting axis, find peaks and troughs having a distance smaller than a set number of sampling points, use the corresponding peaks, troughs, and acceleration signals therebetween as partial data in a door-opening or door-closing combination, and use the partial data as a first set of acceleration signals; the combination of the door opening is wave crest-wave trough or wave trough-wave crest, and the combination of the door closing is wave trough-wave crest or wave crest-wave trough.
The provisional gate opening and closing area forming subunit 312 is configured to calculate a median y of the signal values of the first plurality of acceleration signals, use the median y as a third standard line, and make a value of the first standard line parallel to the time axis as y + c, a value of the second standard line as y + d, a value of the fourth standard line as y-d, and a value of the fifth standard line as y-c, where the first standard line and the fifth standard line are used to filter the extreme points; determining the starting point of a wave crest through a second standard line, taking N points forward as a door opening starting point, determining the end point of a wave trough through a fourth standard line, and taking M points backward as a door closing end point; the area from the door opening starting point to the door closing end point is a temporary door opening and closing area; the N points comprise signal values in a short time before the door is opened, and the M points comprise signal points in a short time after the door is closed; wherein c and d are set values.
In an embodiment of the present invention, the device gate opening and closing area searching sub-module further includes a real gate opening and closing area sub-unit, configured to combine temporary gate opening areas obtained by all the temporary gate opening and closing area forming sub-units, where the temporary gate opening and closing areas are overlapped or too close in interval, so as to obtain a real gate opening and closing area.
Fig. 8 is a schematic sectional view of an acceleration curve during the opening and closing of an elevator door according to an embodiment of the present invention; referring to fig. 8, in an embodiment of the present invention, the median y1 of the elevator door opening and closing curve is found, the 4 intercepted standard lines are y1+400, y1+10, y1-10, and y1-400, and the continuous curve in the region is intercepted when 5 continuous points or more are between the standard line 1 and the standard line 2 or within the standard line 4 and the standard line 5. Then, a peak-valley combination is searched to form a complete door opening and closing curve, and the method is implemented as follows: first, it is determined whether the door opening/closing curve starts from an upward peak or a downward valley. Because the curve of the opening and closing door is greatly interfered by the ascending and descending (the acceleration sensor has a certain degree of deflection relative to the elevator, and the Y axis can also be influenced by the acceleration sensor to generate fluctuation when the elevator ascends and descends), the starting wave crest direction is directly determined by the opening and closing door in a section of non-ascending and descending interval, and the starting wave crest direction is accidental, so that statistics is carried out by the trend of the first wave crest in a plurality of sections of non-ascending and descending intervals, and the frequency is more than that of the actual opening and closing door. Taking fig. 8 as an example, the sequence of the truncated peaks is, at the beginning, an upward peak, a downward valley (in the present method, the whole section within the standard line 4 and the standard line 5 is a valley), and an upward peak. Therefore, after all the peaks and troughs are cut from a segment of continuous packet id data, the direction of every two adjacent peaks and troughs is upward and downward, which is the starting end, and downward and upward, which is the ending end. Two starting ends and two ending ends which are nearest form a section of door opening and closing curve, and two rules are different: firstly, the distance between two different-direction waves (from a point A to a point B and from a point C to a point D in the graph of fig. 8) is not more than 100 points, and secondly, the distance between two same-direction waves is not more than 4000 points (from a point A to a point D in the graph of fig. 8); the abnormal data is discarded.
The above steps result in a complete door opening and closing curve, and the door opening and closing needs to be divided into specific door opening and closing curves. Also taking fig. 8 as an example, a plurality of curves similar to fig. 8 can be obtained after the above steps. Because the elevator door is re-opened, the temporary door opening and closing area obtained by the temporary door opening and closing area obtaining subunit is not necessarily a complete one-time door opening and complete closing process, and the real elevator door opening and closing area obtaining subunit combines all the temporary door opening and closing areas in a superposition mode or at too close interval time to obtain a real elevator door opening and closing area.
FIG. 4 is a block diagram of a sub-module for segmenting the operation of the device during the door opening and closing operation of the device according to an embodiment of the present invention; referring to fig. 4, in an embodiment of the present invention, the acceleration segmentation module 3 includes a device switch door operation process segmentation sub-module 32, and the device switch door operation process segmentation sub-module 32 includes: a first acceleration acquisition subunit 321, a first region segment acquisition subunit 322, and a first curve segmentation subunit 323. The first acceleration obtaining subunit 321 is configured to calculate the jerk of each point in the door opening and closing operation area of the device. The first region acquisition subunit 322 is configured to identify all the regions where the calculated jerk is smaller than the set value on the time axis, and obtain a plurality of regions, including: the system comprises a gantry crane starting area, a plurality of acceleration change interval areas and a gantry crane stopping area; the plurality of jerk change interval areas at least comprise a first jerk change interval area and a second jerk change interval area, and intersection points are formed between curves between the first jerk change interval area and the second jerk change interval area and an acceleration median line. The first curve segmenting subunit 323 is configured to divide the entire operating curve into a plurality of segments according to the gantry crane starting area, the gantry crane stopping area, the plurality of jerk change interval areas, and the intersection obtained by the region segment obtaining subunit.
The above steps have roughly intercepted all the curves of opening and closing the door of the elevator, and then the curves need to be accurately divided on the basis of the curves. In an embodiment of the present invention, the determination principle is: the data returned by the acceleration sensor under the static condition of the elevator is a regular oscillation curve and tends to be stable after low-pass filtering, and in the condition, if the difference between continuous multi-point adjacent data points is larger than a threshold value, namely the data is not stable any more, the elevator door is considered to be in a motion state. In one embodiment of the invention, the difference value of the acceleration of every two adjacent points of 10 continuous points is calculated, if 1 difference value exceeds a threshold value of 0.1, the elevator is considered to be in a running state (because of the short-time constant speed and the variation of the acceleration direction in the process of opening and closing the door of the elevator, a few cases that the acceleration value is smaller than the threshold value may occur). Since the oscillation of the curve cannot be completely eliminated, the open-close or close-open curve obtained by the above steps is generally intercepted into several segments of data, and the longest segment (i.e., the segment containing the largest number of data points) is taken as the accurate open (close) door data curve.
FIG. 11 is a schematic sectional view of a door opening area according to an embodiment of the present invention; referring to fig. 11, in an embodiment of the present invention, the marked sections are a gantry crane starting area, a first speed changing area, a second speed changing area, a third speed changing area (peak), a fourth speed changing area (valley), a fifth speed changing area, a sixth speed changing area, and a gantry crane stopping area, respectively. The middle point is the intersection point of the curve between the wave crest and the wave trough and the median line.
In an embodiment of the present invention, the acceleration data acquired by the first acceleration acquiring subunit 321 includes acceleration data of a plurality of discrete data points, and the acceleration data of the plurality of discrete data points is fitted to an acceleration curve; acquiring a peak curve and a trough curve according to the acceleration curve; one peak curve and the corresponding trough curve are determined as an action unit, and at least one action unit is taken as an operation action. In an embodiment of the present invention, an operation action may be an ascending or descending action, or may be a door opening or/and closing action; can be freely set according to requirements. In some embodiments of the present invention, an operation may be an ascending operation, a descending operation, or a combination of opening and closing the door.
In an embodiment of the invention, the first region acquisition subunit 322 is configured to acquire a curve slope of each key point in the acceleration curve and an acceleration value of each key point; if the positive and negative values of the slope of the curve change or the positive and negative values of the acceleration value change, the changed points are used as segmentation nodes; wherein, the change of the positive value and the negative value comprises any change among a positive value, zero and a negative value.
Fig. 9 is a schematic diagram of speed and acceleration curves in the up-down process of the elevator in one embodiment of the invention; referring to fig. 9, in one embodiment of the present invention, the speed and acceleration of the elevator during the up and down movement are shown in fig. 9.
Fig. 5 is a schematic diagram illustrating the composition of the uplink and downlink area searching sub-module of the device according to an embodiment of the present invention; referring to fig. 5, in an embodiment of the present invention, the acceleration segmentation module 3 includes an apparatus uplink and downlink area search submodule 33, where the apparatus uplink and downlink area search submodule 33 includes: a standard line generating subunit 331, a peak and trough occurrence judging subunit 332, a peak and trough position acquiring subunit 333, and a peak and trough combining subunit 334.
The standard line generating subunit 331 is configured to find the median x1 corresponding to the acceleration data segment data as a third standard line in the acceleration graph, where x1+ e is a second standard line, and x1+ f is a first standard line; wherein e and f are set values.
The peak and trough occurrence determination subunit 332 is configured to determine whether at least 10 consecutive points (in an embodiment of the present invention, at least 10 points may be set) occur between the first standard line and the second standard line, if yes, a peak or a trough appears at this point, and the first point and the last point of this consecutive segment are denoted as a and B.
The peak and trough position acquiring subunit 333 is configured to acquire the position of a peak or a trough; calculating corresponding slopes kA and kB of A, B, calculating d by using the similarity kA ═ data [ A ] -x1)/d and kB ═ x1-data [ B ])/d, and obtaining that the peak or trough should start from the first point before the A point and end at the second point after the B point; wherein data [ A ] represents the data value of point A, and d represents the number of points that are a distance from A, B; kA. kB is obtained by dividing the difference between the forward or backward ith value of the point A and the point B and the point A and the point B by i, wherein i is a set value.
The peak-valley combination subunit 334 is configured to, after obtaining all peaks and valleys, if two adjacent peaks in the same direction appear, determine that the two peaks belong to two single uplink and downlink operating curves; if the number of the middle points in the continuous segment is greater than the two peaks of the stationary data segment with a set threshold (in an embodiment of the present invention, the set threshold may be 1500, but may also be other thresholds, such as 500, 2000, 3000, etc.), the two peaks are determined to belong to two single uplink and downlink operation curves, and the peak of one continuous data segment is combined with the adjacent one of the troughs located behind the peak.
Fig. 7 is a schematic diagram of acceleration curves and standard lines in the up-down process of an elevator in one embodiment of the invention; in an embodiment of the present invention, during the process of finding the uplink and downlink areas of the equipment, the smooth upward-going single-acceleration curve of the elevator is shown in fig. 7, which shows the process of accelerating the elevator from a standstill to the positive direction of the X-axis, and decelerating at a constant speed to the positive direction of the X-axis. The single acceleration curve for the downward run approximates a curve that is flipped up and down from fig. 7. In order to find the uplink and downlink single-time operation curves in the continuous data segment, the upward or downward wave peak needs to be found, and then the two rules are utilized to combine the wave peaks. Taking an upward peak as an example, the median x1 of the data segment is first found as the standard line 3 in fig. 7, x1+20LSB is standard line 2, and x1+160LSB is standard line 1. If there are more than 10 consecutive points between the standard lines 1 and 2, an upward wave is considered to occur there, noting that the first point of this consecutive segment is a and the last point is B. Then, the slope kA and kB is obtained for the points a and B, and the similarity kA ═ data [ a ] -x1)/d and kB ═ x1-data [ B ])/d are used to obtain d, so that the peak should start from the point a before the first point and end at the point B after the second point. Where data [ A ] represents the data value for point A and d represents the number of points a distance from A, B. kA, kB can be obtained by dividing the difference between the value of the 5 th point forward or backward from the point a, B and the point a, B by 5. After all wave crests are found out in the mode, two adjacent wave crests in the same direction are determined to belong to two single uplink and downlink operation curves according to the rule, two end wave crests of a stable data section with the number of points larger than 1500 are determined to belong to two single uplink and downlink operation curves, and wave crests of a continuous data section are combined in pairs to identify most data sections. But there is also a data error in the continuous data segment, such as considering that two peaks of a segment of the uplink and downlink curve are in the same direction. In this case, the first peak is discarded as default data, and the second peak is combined with the following peak.
FIG. 6 is a schematic diagram illustrating the components of a segmentation submodule in the uplink and downlink operation process of the device according to an embodiment of the present invention; referring to fig. 6, in an embodiment of the present invention, the acceleration segmentation module 3 includes an equipment uplink and downlink operation process segmentation sub-module 34, where the equipment uplink and downlink operation process segmentation sub-module 34 includes: a second acceleration acquisition subunit 341, a second region segment acquisition subunit 342, and a second curve segmentation subunit 343. FIG. 7 is a schematic diagram of uplink region segmentation in an embodiment of the present invention; referring to fig. 12, in an embodiment of the invention, the second acceleration obtaining subunit 341 is configured to calculate the jerk of each point of the corresponding region in the uplink or downlink operation. The second region segment acquiring subunit 342 is configured to identify and calculate all region segments with jerk values smaller than a set value on a time axis of an acceleration curve corresponding to an operation motion, and filter the start and stop region segments to obtain 3 region segments, which are a uniform acceleration segment, a uniform velocity segment, and a uniform deceleration segment. The second curve segmentation subunit 343 is configured to divide the whole segment region into 7 segments according to the region segment obtained by the second region segment obtaining subunit, and these are an acceleration increasing segment, a uniform acceleration increasing segment, an acceleration decreasing segment, a uniform velocity segment, an acceleration and deceleration segment, a uniform deceleration segment, and a deceleration decreasing segment; the acceleration section is an acceleration time period in which acceleration is increased, the deceleration section is an acceleration time period in which acceleration is decreased, the uniform acceleration section is an acceleration time period in which acceleration is not changed, the acceleration section is a deceleration time period in which acceleration is increased, and the deceleration section is a deceleration time period in which acceleration is decreased.
In one embodiment of the present invention, the marked points are all the regions with jerk values less than 0.05m/s2, and fig. 11 and 12 are data curves after low pass filtering.
In an embodiment of the invention, in the segmentation process of the uplink and downlink operation processes of the equipment, the uplink or downlink mode of the equipment is judged to be; if the initial change direction of the acceleration signal of the one-time operation is the same as the acceleration direction when the equipment is static, the equipment is judged to be in an uplink state, otherwise, the equipment is judged to be in a downlink state.
In summary, the device operation process segmentation system provided by the present invention can analyze the device operation process according to the acceleration data in the device operation process to obtain each stage of the device operation and the acceleration data of each stage; so that the different characteristics of each stage can be followed for identification and judgment.
The system can be used for judging the abnormal operation of equipment, can acquire the acceleration data of the equipment (such as an elevator) according to the operation condition of the equipment, and can judge whether the equipment (such as the elevator) operates in an abnormal condition (such as the time for opening and closing the door is prolonged because the door is blocked by foreign matters) according to the acceleration data.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The description and applications of the invention herein are illustrative and are not intended to limit the scope of the invention to the embodiments described above. Variations and modifications of the embodiments disclosed herein are possible, and alternative and equivalent various components of the embodiments will be apparent to those skilled in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other components, materials, and parts, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the invention.
Claims (9)
1. An equipment operating process segmentation system, the equipment operating process segmentation system comprising:
the acceleration acquisition module is used for acquiring acceleration data of the equipment running in a set direction;
the acceleration data area forming module is used for acquiring acceleration data of one operation action according to the acceleration data acquired in the set direction and forming an acceleration data area corresponding to the operation action;
the acceleration segmentation module is used for dividing an acceleration data area of an action into a plurality of segments according to the acceleration data in the acceleration data area of the action; the acceleration segmentation module comprises:
a segment node generating unit configured to acquire, as a segment region, a region in the acceleration data region in which a rate of change of the acceleration is lower than a set value, and generate one or two segment nodes in one segment region; two end points of an acceleration data area of one action are also respectively used as segmentation nodes;
-a segment forming unit for forming a plurality of segments by using the area between adjacent segment nodes as a segment according to the obtained plurality of segment nodes.
2. The plant operational process segmentation system of claim 1, wherein:
the segmentation node generation unit generates two segmentation nodes in a segmentation area, and the mode for generating the two segmentation nodes is as follows: segmentation nodes are generated at both ends of the segmentation region, respectively.
3. The plant operational process segmentation system of claim 1, wherein:
the acceleration segmentation module further comprises a data smoothing processing unit which uses low-pass filtering to smooth the data and eliminates the fluctuation of the collected acceleration data.
4. The plant operational process segmentation system of claim 1, wherein:
the segmented node generating unit acquires wave crests and wave troughs in an acceleration signal curve in an acceleration data area; simultaneously acquiring acceleration data sections with acceleration data smaller than a set threshold in the acceleration data area, wherein one acceleration data section is used as a segmented node;
each peak, each valley and each acceleration data section of the acquired acceleration signal are taken as segmented nodes, and data between adjacent nodes is taken as segmented data of the acceleration data.
5. The plant operational process segmentation system of claim 1, wherein:
the acceleration segmentation module comprises an equipment door opening and closing area searching submodule, and the equipment door opening and closing area searching submodule comprises:
the door-closing combination acquiring subunit is used for finding out wave crests and wave troughs in all acceleration signal curves of the setting shaft, finding out wave crests and wave troughs of which the distances between the wave crests and the wave troughs are smaller than a set number of sampling points, taking the corresponding wave crests, wave troughs and acceleration signals between the wave crests and the wave troughs as partial data in a door-opening or door-closing combination at one time, and taking the partial data as a first batch of acceleration signals; the combination of the door opening is wave crest-wave trough or wave trough-wave crest, and the combination of the door closing is wave trough-wave crest or wave crest-wave trough;
the temporary switch door area forming subunit is used for calculating a median y of signal values of the first batch of acceleration signals, the median y is used as a third standard line, the value of the first standard line parallel to a time axis is y + c, the value of the second standard line is y + d, the value of the fourth standard line is y-d, the value of the fifth standard line is y-c, and the first standard line and the fifth standard line are used for filtering extreme points; determining the starting point of a wave crest through a second standard line, taking N points forward as a door opening starting point, determining the end point of a wave trough through a fourth standard line, and taking M points backward as a door closing end point; the area from the door opening starting point to the door closing end point is a temporary door opening and closing area; the N points comprise signal values in a short time before the door is opened, and the M points comprise signal points in a short time after the door is closed; wherein c and d are set values.
6. The plant operational process segmentation system of claim 5, wherein:
the device door opening and closing area searching sub-module further comprises a real door opening and closing area sub-unit, and the real door opening and closing area sub-unit is used for combining temporary door opening and closing areas obtained by all the temporary door opening and closing area forming sub-units in a superposition mode or in a mode of being too close in interval time to obtain a real door opening and closing area.
7. The plant operation process segmentation system of claim 1, 5 or 6, wherein:
the acceleration segmentation module comprises an equipment door opening and closing operation process segmentation submodule, and the equipment door opening and closing operation process segmentation submodule comprises:
the first acceleration acquisition subunit is used for calculating the acceleration of each point in the door opening and closing operation area of the equipment;
the first regional section acquisition subunit is used for identifying and calculating all regional sections with jerk values smaller than a set value on a time axis to obtain a plurality of regional sections, and comprises the following steps: the system comprises a gantry crane starting area, a plurality of acceleration change interval areas and a gantry crane stopping area; the acceleration change interval areas at least comprise a first acceleration change interval area and a second acceleration change interval area, and intersection points are formed between curves between the first acceleration change interval area and the second acceleration change interval area and an acceleration median line;
and the first curve segmentation subunit is used for dividing the whole operation curve into a plurality of segments according to the gantry crane starting area, the gantry crane stopping area, the plurality of jerk change interval areas and the intersection point obtained by the area segment acquisition subunit.
8. The plant operational process segmentation system of claim 1, wherein:
the acceleration segmentation module comprises an equipment uplink and downlink area searching submodule, and the equipment uplink and downlink area searching submodule comprises:
the standard line generating subunit is used for finding a median x1 corresponding to the acceleration data segment data as a third standard line in the acceleration curve graph, wherein x1+ e is a second standard line, and x1+ f is a first standard line; wherein e and f are set values;
a peak and trough occurrence judging subunit, configured to judge whether at least one set point that is continuous occurs between the first standard line and the second standard line, if yes, a peak or a trough is considered to occur at this point, and note that a first point of the continuous segment is a, and a last point is B;
a peak and trough position obtaining subunit, configured to obtain a position of a peak or a trough; calculating corresponding slopes kA and kB of A, B, calculating d by using the similarity kA ═ data [ A ] -x1)/d and kB ═ x1-data [ B ])/d, and obtaining that the peak or trough should start from the first point before the A point and end at the second point after the B point; wherein data [ A ] represents the data value of point A, and d represents the number of points that are a distance from A, B; kA. kB is obtained by dividing the difference between the forward or backward ith point value of the point A and the point B and the point A and the point B by i, wherein i is a set value;
the wave crest and trough combination subunit is used for determining that the two wave crests belong to two single uplink and downlink operation curves if two adjacent wave crests in the same direction appear after all the wave crests and the wave troughs are obtained; if the number of the middle points of the continuous section is larger than two sections of wave crests of the stable data section with a set threshold value, the wave crests of one continuous data section are determined to belong to two single uplink and downlink operation curves, and the adjacent wave crests and the wave troughs which are positioned behind the continuous data section are combined.
9. The plant operation process segmentation system of claim 1 or 8, wherein:
the acceleration segmentation module comprises an equipment uplink and downlink operation process segmentation submodule, and the equipment uplink and downlink operation process segmentation submodule comprises:
the second acceleration acquisition subunit is used for calculating the acceleration of each point of the corresponding area in one uplink or downlink operation action;
the second regional section acquisition subunit is used for identifying and calculating all regional sections with acceleration values smaller than a set value on a time axis of an acceleration curve corresponding to an operation action, and filtering the start and stop regional sections to obtain 3 regional sections which are respectively a uniform acceleration section, a uniform velocity section and a uniform deceleration section;
the second curve segmentation subunit is used for dividing the whole segment region into 7 segments according to the region segment obtained by the second region segment acquisition subunit, and the 7 segments are an acceleration increasing segment, a uniform acceleration increasing segment, an acceleration reducing segment, a uniform speed segment, an acceleration and deceleration segment, a uniform deceleration segment and a deceleration reducing segment; the acceleration section is an acceleration time period in which acceleration is increased, the deceleration section is an acceleration time period in which acceleration is decreased, the uniform acceleration section is an acceleration time period in which acceleration is not changed, the acceleration section is a deceleration time period in which acceleration is increased, and the deceleration section is a deceleration time period in which acceleration is decreased.
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