CN113179485A - Industrial production quality inspector work monitoring method and system based on UWB positioning - Google Patents
Industrial production quality inspector work monitoring method and system based on UWB positioning Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
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Abstract
The invention provides a UWB positioning-based industrial production quality inspector work monitoring method and a UWB positioning-based industrial production quality inspector work monitoring system, wherein the monitoring method comprises the following steps: presetting a mapping relation between a production result of automatic production equipment and a theoretical quality inspection path; acquiring an actual production result of the automatic production equipment through the automatic production equipment, and acquiring a theoretical quality inspection path corresponding to the actual production result according to the mapping relation; acquiring an actual motion track of a quality inspector in effective time through positioning equipment; obtaining an effective working track of a quality inspector according to the theoretical quality inspection path and the actual motion track; obtaining the quality inspection concentration degree and the quality inspection completion degree of the work of a quality inspector according to the effective work track; and monitoring the work of quality inspectors according to the quality inspection concentration degree and the quality inspection completion degree. The monitoring method of the invention not only can realize automatic monitoring of the work of the quality inspector, but also can avoid the interference of the monitoring process on the normal work of the quality inspector.
Description
Technical Field
The application belongs to the technical field of monitoring, and particularly relates to a UWB positioning-based industrial production quality inspection work monitoring method and system.
Background
In an industrial automatic production environment, part of quality inspection work needs quality inspection personnel to walk around a production line and inspect production products one by one to complete related quality inspection work. In order to monitor the daily operation specifications of quality inspectors and prevent incomplete quality inspection tasks caused by negligence or other interference of the inspectors, IC card readers are often set in quality inspection areas, and whether the quality inspectors complete corresponding quality inspection work or not is measured according to the check-in times and product batches of the quality inspectors. However, a card reader is required to be laid at each card punching site, and the related strong and weak electric wiring brings installation cost and maintenance cost to the system. In high-frequency quality inspection operation, the production efficiency is seriously affected by factors such as card punching action, electromagnetic interference of a card punching machine and the like.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies in the prior art.
Disclosure of Invention
The present application is directed to a method and system for monitoring industrial production quality inspector work based on UWB positioning, so as to overcome the above-mentioned problems in the prior art.
In order to achieve the above purpose, the present application provides the following technical solutions:
the monitoring method of industrial production quality inspector work based on UWB positioning comprises the following steps:
presetting a mapping relation between a production result of automatic production equipment and a theoretical quality inspection path; the production result is the output result of the automatic production equipment within a set time; the theoretical quality inspection path is a theoretical motion track of a quality inspector walking in a quality inspection area to finish the quality inspection work of the production result;
acquiring an actual production result of automatic production equipment through the automatic production equipment, and acquiring a theoretical quality inspection path corresponding to the actual production result according to the mapping relation;
acquiring an actual motion track of a quality inspector in effective time through positioning equipment; the effective time is the time period required by a quality inspector to finish quality inspection on a primary production result;
obtaining an effective working track of a quality inspector according to the theoretical quality inspection path and the actual motion track;
obtaining the quality inspection concentration degree and the quality inspection completion degree of the work of a quality inspector according to the effective work track;
and monitoring the work of a quality inspector according to the quality inspection concentration degree and the quality inspection completion degree.
Preferably, the positioning apparatus comprises:
the UWB positioning base station has a certain distance with a quality inspector, and signals of the UWB positioning base station can cover the quality inspection area;
the UWB positioning tag is arranged on the body of a quality inspector, and the UWB positioning tag is used for positioning the motion trail of the quality inspector.
Preferably, the theoretical motion trajectory comprises at least a start point and an end point.
Preferably, the mapping relationship between the production result of the automatic production equipment and the theoretical quality inspection path is a mapping table.
Preferably, the obtaining of the effective working trajectory of the quality inspector according to the theoretical quality inspection path and the actual motion trajectory includes:
determining a position set according to the distance between the theoretical quality inspection path and the actual motion track;
and obtaining the effective working track of the quality inspector according to the position set.
Preferably, a position set is determined according to the distance between the theoretical quality inspection path and the actual motion trajectory, and the position set is formed by positions in the actual motion trajectory, the distance between which and any key point in the theoretical quality inspection path L is smaller than a set distance.
Preferably, if the position set is an empty set, the effective working track is an empty set; and if the position set is a non-empty set, determining the effective working track according to the position set.
Preferably, an effective starting point and an effective ending point of the effective working track are determined according to the position set and the theoretical quality inspection path.
In order to achieve the above object, the present application further provides the following technical solutions:
a monitoring system for UWB positioning based industrial production quality inspector work, comprising a processor, a memory and a computer program stored in the memory and capable of running on the processor, characterized in that the processor realizes the steps of the above-mentioned monitoring method for UWB positioning based industrial production quality inspector work when executing the computer program.
Has the advantages that:
the application provides a monitoring method and system based on industrial production quality control personnel work of UWB location, at first install positioning device outside indoor quality control area to set up the production result and the mapping relation in theoretical quality control route of automatic production equipment, then acquire the quality control route that actual production result corresponds through automatic production equipment, then adopt indoor UWB positioning technology to carry out remote location to quality control personnel, the quality control through quality control personnel work is absorbed in degree and is realized the monitoring to quality control personnel's quality control work. The industrial production quality inspector work monitoring based on UWB positioning not only can realize automatic monitoring of the quality inspector work, but also can avoid interference of the monitoring process on the normal work of the quality inspector.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. Wherein:
FIG. 1 is a flow chart of the monitoring method of industrial production quality inspector work based on UWB positioning according to the invention;
FIG. 2 is a schematic view of an automatic production layout according to an embodiment of the present invention
FIG. 3 is a flow chart illustrating the determination of the effective working trajectory of the quality inspector according to the present invention;
FIG. 4 is a flow chart of the present invention for determining an effective work trajectory based on a set of locations;
FIG. 5 is a flowchart of the present invention for obtaining quality inspection concentration and quality inspection completeness according to the effective working trajectory;
description of the drawings: 1. a UWB positioning base station; 2. a UWB positioning tag; 3. a quality inspection area.
Detailed Description
The present application will be described in detail below with reference to the embodiments with reference to the attached drawings. The various examples are provided by way of explanation of the application and are not limiting of the application. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present application without departing from the scope or spirit of the application. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. It is therefore intended that the present application cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
In order to solve the existing technical problem, the application provides the following technical scheme:
And 3, acquiring an actual production result of the automatic production equipment through the automatic production equipment, and acquiring a theoretical quality inspection path corresponding to the actual production result according to the mapping relation.
Step 4, acquiring the actual motion track of the quality inspector in the effective time through the positioning equipment; the effective time is the time period required by a quality inspector to finish quality inspection on a production result.
And 5, obtaining the effective working track of the quality inspector according to the theoretical quality inspection path and the actual motion track.
And 6, obtaining the quality inspection concentration degree and the quality inspection completion degree of the work of the quality inspector according to the effective work track.
And 7, monitoring the work of a quality inspector according to the quality inspection concentration degree and the quality inspection completion degree.
The invention relates to a UWB positioning-based industrial production quality inspector work monitoring method. Firstly, installing positioning equipment around an indoor quality inspection area, and setting a mapping relation between a production result of automatic production equipment and a theoretical quality inspection path; then obtaining an actual production result from the automatic production equipment and calculating a corresponding quality inspection path according to the mapping relation; then, an indoor UWB positioning technology is adopted to remotely position the quality inspector, and an effective working path of the quality inspector is calculated; and finally, monitoring the quality inspection work of the quality inspector through the quality inspection concentration degree and the quality inspection completion degree of the quality inspector. The monitoring method based on UWB positioning not only can automatically monitor the work of quality inspectors, but also can avoid interference in the monitoring process and improve the production efficiency.
The technical scheme of the monitoring method for the work of the quality inspector in the industrial production can be suitable for the monitoring of the work of the quality inspector in various industrial productions, and in order to describe the relevant details of the technical scheme of the invention in detail, the step processes of the monitoring method for the work of the quality inspector in the industrial production and the industrial production process are described by taking the quality inspector in the automatic production of the medical non-woven fabric as an example.
Firstly, in the automatic production process of the medical non-woven fabric, the automatic production equipment is a spreading machine, the non-woven fabric raw material is stretched and spread by the spreading machine, and when the spreading machine finishes spreading once, a quality inspector needs to perform quality inspection on the spread non-woven fabric along one side of the spreading machine. The embodiment of the invention mainly analyzes the motion trail of the work of the quality inspector according to the motion trail of the quality inspector and the theoretical quality inspection path of the automatic production equipment of the spreading machine, thereby realizing the monitoring of the quality inspector.
The method comprises the following steps:
fig. 1 is a flowchart illustrating a monitoring method for UWB positioning based industrial production quality inspector work according to the present invention, and the following describes, with reference to fig. 1, the steps of the monitoring method for UWB positioning based industrial production quality inspector work according to the present invention, including:
Firstly, the positioning device comprises a UWB positioning base station 1 and a UWB positioning tag 2, wherein the UWB positioning base station 1 has a certain distance with a quality inspector, and a signal of the UWB positioning base station 1 can cover a quality inspection area 3; UWB location label 2 sets up on the quality testing person's body, realizes the location to quality testing person through UWB location label 2. The positioning equipment also comprises a UWB two-dimensional coordinate calculation system which can return the two-dimensional coordinates of the UWB positioning label in the quality inspection area at regular time, namely the motion track of the quality inspector in the quality inspection area. In the present application, the timing is set at every 1s, and in other embodiments, the timing may be set at every 2 s.
Specifically, in this application embodiment, the automatic production equipment is a spreader, four UWB positioning base stations are installed outside a quality inspection area of the spreader, as shown in fig. 2, the spreader and a quality inspector are both within a monitoring range of UWB, the spreader is controlled by the automatic equipment, and a UWB two-dimensional coordinate calculation system can return two-dimensional coordinates of a UWB positioning tag in the quality inspection area at regular time.
The automatic production equipment is a cloth spreading machine, and the starting time, the ending time and the spreading result of each spreading can be automatically returned. In the embodiment of the present application, the UWB positioning technology may specifically be a positioning method such as TOF, TDOA, AOA, or the like.
the theoretical motion trail comprises at least two key points, and the key points are points defined for describing the quality inspection path. The quality inspector must pass through the key points in sequence to be judged as completing one quality inspection (walking one quality inspection path). The general proposal is: and according to the quality inspection path, setting a key point every 2 meters, and setting a key point at the beginning and the end of the quality inspection path. Thus, the theoretical motion profile of the present application includes at least a start point and an end point.
In the embodiment of the present application, the theoretical quality inspection path is a straight line composed of a plurality of key points, but in practical application, the motion trajectory of the quality inspector is not necessarily a straight line, and may be an irregular shape such as a curve, a broken line, and the like. The number of the key points is more than or equal to 2.
The mapping relationship between the production result of the automatic production equipment and the theoretical quality inspection path can be in different modes, in the embodiment of the application, the mapping relationship between the production result of the automatic production equipment and the theoretical quality inspection path is a mapping table, namely the relationship between the production result and the theoretical quality inspection path is established in a lookup table mode.
In the application, the production result of the automatic production equipment is a result produced by the automatic production equipment within a set time or a production task executed within the set time, and the quality inspector must walk a certain distance in the quality inspection area to complete the quality inspection work of the production result, wherein the set time refers to the time required for completing one production task. In the non-woven fabric quality inspection monitoring scene of the embodiment of the application, two possible production results are provided, one is result 1, and the result can be represented by a cloth pulling result of A → B, namely, the cloth pulling machine completes one cloth pulling task from a point A to a point B; the other is a result 2, which can be represented by a cloth spreading result of B → A, namely, the cloth spreading machine completes a cloth spreading task from a point B to a point A, and the point A and the point B respectively represent a starting point and an end point of the cloth spreading machine when the cloth spreading task is executed; as shown in table 1, a mapping table between the production result of the spreading machine and the theoretical quality inspection path is shown; the theoretical quality inspection path corresponding to the cloth drawing result of A → B is (x)0,y0)→(x1,y1)→(x2,y2)→ (x3,y3) The theoretical quality inspection path corresponding to the cloth drawing result of B → A is (x)3,y3)→(x2,y2)→ (x1,y1)→(x0,y0)。
TABLE 1 mapping table of production results and theoretical quality testing paths of spreading machine
| Production results | Theoretical quality inspection path |
| Results 1 | (x0,y0)→(x1,y1)→(x2,y2)→(x3,y3) |
| Results 2 | (x3,y3)→(x2,y2)→(x1,y1)→(x0,y0) |
And 3, acquiring an actual production result of the automatic production equipment, and acquiring a theoretical quality inspection path corresponding to the actual production result according to the mapping relation.
In the non-woven fabric quality inspection monitoring of the embodiment of the application, after the cloth spreading machine finishes one-time cloth spreading, the actual production result of the cloth spreading machine, the start time and the end time corresponding to the actual production result are returned, and the actual return result R can be used1Results (a, t)s,te) Wherein a is 1 or 2. When a is 1, the production result is 1, tsStarting time for completing the spreading task from point A to point B, teIs the end time of the task. When a is 2, the production result is result 2, tsStarting time for finishing the spreading task from point B to point A, teIs the end time of the task.
For the actual production result of the spreading task, obtaining the theoretical quality inspection path L (x) of the spreading task needing the quality inspector to walk through the mapping relation of the lookup table 10,y0)→(x1,y1)→ (x2,y2)→(x3,y3)。
Step 4, acquiring the actual motion track of the quality inspector in the effective time through the positioning equipment; the effective time is the time period corresponding to the quality inspector completing the quality inspection of the primary production result.
In the embodiment of the invention, the starting time t of one production task is carried out according to the automatic production equipmentsEnd time teAnd determining the effective time by the time threshold delta T, wherein the effective time is Ts,te+ΔT]Wherein, the time threshold value delta T is the maximum time required by a quality inspector for completing quality inspection on a primary production result; the delta T is determined according to the working time of the cloth spreading machine and the working efficiency of a quality inspector. In the embodiment of the application, one-time production means that the cloth spreading machine finishes one-time spreading of raw materials.
In the nonwoven fabric production process, the average working time of the tenter for completing one production task is 20s, and the quality inspection time is 60s, so the time threshold Δ T is set to 60 s.
And obtaining the actual motion track of the quality inspector in the quality inspection area within the effective time through the positioning equipment. The actual motion track is
I.e. all the position sequences of the quality inspector within the validity time.
And 5, obtaining the effective working track of the quality inspector according to the theoretical quality inspection path and the actual motion track.
The theoretical quality inspection path comprises at least two key points, and the actual motion trail is a position sequence of a timing interval.
For convenience of description and clearer understanding of the process of the effective working trajectory, the theoretical quality inspection path is described as L, and the key points are L1, L2, …, Li, …, Lm; actual motion trajectory
The positions of (A) are P1, P2, …, Pj, … and Pn, and i, m, j and n are positive integers.
Fig. 3 is a flow chart illustrating the determination of the effective working trajectory of the quality inspector according to the present invention, and fig. 4 is a flowchart illustrating the process of obtaining the effective working trajectory of the quality inspector according to the theoretical quality inspection path and the actual movement trajectory.
Step 51, determining a position set according to the distance matching degree between the theoretical quality inspection path and the actual motion track;
in the actual movement track
Searching a position set with the distance from any key point in the theoretical quality inspection path L being less than the set distance delta d
For this step, the actual motion trajectory is
The positions having a distance less than the set distance Δ d from any critical point (L1, L2, …, Li, …, Lm) in the theoretical quality inspection path L form a position set
The position is collected as the actual motion track
A subset of (a). That is, when S (Pi, Lj) < Δ d, then
Wherein S (Pi, Lj) represents the actual motion track
And (3) the distance between any position (P1, P2, …, Pj, …, Pn) and any key point (L1, L2, …, Li, …, Lm) in the theoretical quality inspection path L.
Step 52, obtaining an effective working track of a quality inspector according to the position set;
the method comprises the following steps: if location aggregation
If the working track is empty, the effective working track is directly set
Setting the device as an empty set; if the position set is not an empty set, the position set is determined
Determining an effective work trajectory
FIG. 4 is a flow chart illustrating the determination of an effective working trajectory from a set of positions, as follows:
step 521, according to the position set
Determining a reference starting end point and a reference ending end point of the effective working track by the theoretical quality inspection path L;
from a set of locations
Finding the nearest point to the last point of the theoretical quality inspection path L
From the position set as a reference end point of the valid work trajectory
Find the nearest point to the first point of the theoretical quality inspection path L
As a reference starting end point for the valid working trajectory.
Step 522, calculating an effective starting point and an effective ending point of the effective working track according to the reference starting end point of the effective working track and the reference ending end point of the effective working track according to time;
in this step, the slave location sets
In each case
And
and calculating the effective starting point and the effective ending point of the effective working track according to the time in the neighborhood of the set distance delta d for the reference starting end point and the reference ending end point.
The effective starting point determining mode is as follows: from a set of locations
In search of a reference start endpoint
Is set to the point of minimum time in the neighborhood of distance Δ d
As an effective starting point for an effective working trajectory.
The effective termination point determination method comprises the following steps: from a set of locations
In-search reference termination point
Is set to be the point with the largest time in the neighborhood of the distance delta d
As an effective end point of the effective working trajectory.
If a valid starting point
Corresponding time less than the effective end point
Correspond toThe actual motion trajectory is obtained
The middle time is at the effective starting point
And effective termination point
Set of points to be effective working trajectory
Otherwise, the quality inspector does not walk according to the specified path and will effectively work on the track
Set as an empty set.
Step 6, obtaining the quality inspection concentration degree and the quality inspection completion degree of the work of the quality inspector according to the effective work track, as shown in fig. 5;
step 61, if the effective working track
If the result is an empty set, the quality inspection concentration degree A is 0, and the quality inspection completion degree S is 0; otherwise, go to step 62;
step 62, from the effective working trajectory
The first point is taken according to the time sequence and marked as p;
step 63, calculating a continuous line segment set formed by the first point p from the key point of the quality inspection path L
Is recorded as
The calculation method comprises the following steps:
wherein
Is any line segment in the set of line segments, xpAnd ypIs the coordinates of the point p and,
and
is the starting point coordinate of the line segment l,
and
is the coordinates of the end point of the line segment l,
if the minimum distance is less than the set distance, step 64
Step 65 is entered, otherwise step 66 is entered, at which point
Step 65, adding key points in the theoretical quality inspection path L, the distance from the key points p to the set p is less than the set distance delta d into the set M, and adding the first point p into the set K;
step 66, from the effective working trajectory
Take downOne point, labeled p;
step 67, if p points exist, step 63 is entered, otherwise step 68 is entered.
Step 68, calculating the quality inspection completion
Concentration degree of harmony quality inspection
| represents the number of elements in the set.
In the above step, Δ d is a neighborhood parameter for determining whether two points coincide, and is a positive number, for example, Δ d is less than or equal to 1000 cm. When the parameter is applied, the parameter is related to factors such as UWB detection precision, detection environment and quality inspection requirements, and delta d is 150cm in the non-woven fabric production application of the embodiment of the invention.
And 7, monitoring the work of a quality inspector according to the quality inspection concentration degree and the quality inspection completion degree.
And generating a quality inspection alarm according to the quality inspection completion degree S and the quality inspection concentration degree A.
And if the quality inspection completion S is less than 0.5 or A is less than 0.4, generating an alarm and stopping working.
If the S is more than or equal to 0.5 and less than 0.8 or the A is more than or equal to 0.4 and less than 0.6, the early warning of the loosening of the quality inspection is generated without stopping the work.
If the quality inspection completion degree S is more than or equal to 0.8 and A is more than or equal to 0.6, no early warning is generated, and the operation is continued.
The above-mentioned warning threshold is not a limitation to the technical solution of the present application, and as another embodiment, the warning threshold may be further adjusted according to a specific working condition. The alarm can be a buzzer alarm or an audible and visual alarm.
The embodiment of the system is as follows:
a monitoring system for industrial production quality inspector work based on UWB positioning, comprising a processor, a memory and a computer program stored in the memory and capable of running on the processor, characterized in that the processor realizes the steps of the monitoring method for industrial production quality inspector work based on UWB positioning when executing the computer program.
The steps of the monitoring method for the industrial production quality inspector work based on UWB positioning are described in detail in the above method embodiments, and are not described herein again.
In conclusion, the invention adopts UWB indoor positioning technology to remotely position the quality inspector, can obtain the actual motion track of the quality inspector walking in the quality inspection area, and the actual motion track can be covered by the detection range of the UWB technology, establishes the quality inspection behavior of the quality inspector to analyze, and carries out automatic monitoring and alarming on the quality inspector by calculating the quality inspection completion degree and the quality inspection concentration degree. The non-interference automatic monitoring of quality inspectors is realized.
The above embodiments are only for illustrating the technical solutions of the present application and not for limiting the same, and although the present application is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the disclosure without departing from the spirit and scope of the disclosure, which is to be covered by the claims.
Claims (9)
1. The industrial production quality inspector work monitoring method based on UWB positioning is characterized by comprising the following steps:
presetting a mapping relation between a production result of automatic production equipment and a theoretical quality inspection path; the production result is the output result of the automatic production equipment within a set time; the theoretical quality inspection path is a theoretical motion track of a quality inspector walking in a quality inspection area to finish the quality inspection work of the production result;
acquiring an actual production result of automatic production equipment through the automatic production equipment, and acquiring a theoretical quality inspection path corresponding to the actual production result according to the mapping relation;
acquiring an actual motion track of a quality inspector in effective time through positioning equipment; the effective time is the time period required by a quality inspector to finish quality inspection on a primary production result;
obtaining an effective working track of a quality inspector according to the theoretical quality inspection path and the actual motion track;
obtaining the quality inspection concentration degree and the quality inspection completion degree of the work of a quality inspector according to the effective work track;
and monitoring the work of a quality inspector according to the quality inspection concentration degree and the quality inspection completion degree.
2. The UWB positioning-based industrial production quality inspector work monitoring method according to claim 1, wherein the positioning device comprises:
the UWB positioning base station has a certain distance with a quality inspector, and signals of the UWB positioning base station can cover the quality inspection area;
the UWB positioning tag is arranged on the body of a quality inspector, and the motion trail of the quality inspector is positioned through the UWB positioning tag.
3. The method for monitoring the operation of industrial quality inspector based on UWB positioning according to claim 1, wherein the theoretical motion trajectory comprises at least a start point and an end point.
4. The method for monitoring the operation of industrial quality testers based on UWB positioning according to claim 1, wherein the mapping relationship between the production result of the automatic production equipment and the theoretical quality testing path is a mapping table.
5. The method for monitoring the work of the industrial quality inspector based on the UWB positioning as claimed in claim 1, wherein the obtaining the effective work track of the quality inspector according to the theoretical quality inspection path and the actual motion track comprises:
determining a position set according to the distance between the theoretical quality inspection path and the actual motion track;
and obtaining the effective working track of the quality inspector according to the position set.
6. The UWB positioning-based industrial production quality inspector work monitoring method of claim 5 wherein the position set is determined according to the distance between the theoretical quality inspection path and the actual motion trajectory, and is formed by the position of any key point in the actual motion trajectory and the theoretical quality inspection path L, which is less than a set distance.
7. The method for monitoring the working of industrial production quality inspectors based on UWB positioning according to claim 5, wherein if the position set is an empty set, the effective working track is an empty set; and if the position set is a non-empty set, determining the effective working track according to the position set.
8. The method of claim 7 wherein the effective start point and the effective end point of the effective working track are determined according to the position set and the theoretical quality inspection path.
9. A UWB location based monitoring system for industrial production quality inspector work comprising a processor, a memory and a computer program stored in and executable on said memory, characterized in that said processor, when executing said computer program, implements the steps of the UWB location based monitoring method for industrial production quality inspector work according to any of the claims 1-8.
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