WO2019105269A1 - Operator evaluation system, operator evaluation device and evaluation method - Google Patents

Abstract

An operator evaluation system (1), operator evaluation device and evaluation method. The operator evaluation system (1) is provided with: a video data acquisition unit (10), for acquiring video data obtained by filming an operation site; an area extraction unit (20), for defining an evaluation area at least according to a workshop zoning map of the operation site, and extracting the evaluation area from the video data obtained by the video data acquisition unit (10) by using a spatial conversion relationship between the workshop zoning map and a video image; an operator identification unit (30), for identifying an operator located in the evaluation area on the basis of the evaluation area extracted by the area extraction unit (20), and acquiring the stay time and the movement speed of the operator in the evaluation area; and an evaluation unit (40), for analyzing the behavior of the operator according to the stay time and the movement speed of the operator in the evaluation area which are obtained by the operator identification unit (30), and evaluating the operation by the operator and a factory management element of the operationusing at least one evaluation method.

Description

Operator evaluation system, operator evaluation device, and evaluation method Technical field

The present invention relates to an operator evaluation system, an operator evaluation device, and an evaluation method.

Background technique

In modern factory management, MES (manufacturing execution system) is used to contact management and production sites. However, the main concern of MES is that there is data output on the spot, which lacks attention to people. The workers engaged in production activities are an indispensable part of most factories, and their labor conditions are closely related to production efficiency and quality.

On the other hand, the management of workers in the past has been carried out artificially by monitoring live video. Therefore, it is difficult to accurately grasp and evaluate the work situation of the worker. Further, it is also difficult to effectively manage the production schedule of the factory and the like.

Summary of the invention

The present invention has been made in view of the above-described technical problems in the prior art, and an object thereof is to provide an operator evaluation system, an operator evaluation device, and an evaluation method capable of improving personnel management capability and factory production schedule management capability.

In order to solve the above problem, the operator evaluation system of the present invention includes: a video data acquisition unit that acquires video data obtained by imaging a job site; and an area extraction unit that specifies an evaluation area based on at least a shop floor plan of the job site. Using the spatial transformation relationship between the shop floor plan and the video image, the evaluation area is extracted from the video data acquired by the video data acquisition unit; and the worker identification unit is based on the evaluation extracted by the area extraction unit a region identifying an operator located in the evaluation area, and acquiring a dwell time and a moving speed of the worker in the evaluation area; and an evaluation unit according to the worker obtained by the worker identification unit The behavior of the worker is analyzed by the dwell time and the moving speed in the evaluation area, and the work performed by the worker and the factory of the work are evaluated by at least one of a plurality of evaluation methods Management elements.

According to the worker evaluation system of the present invention, the evaluation area is extracted from the video data based on the spatial conversion relationship between the shop floor plan and the video image, and the work of the worker and the factory management element are evaluated for the exercise information of the worker in the evaluation area. As a result, personnel management capabilities and factory production schedule management capabilities can be improved, and plant management personnel can be further provided with reasonable management advice.

Furthermore, in the worker evaluation system, the area extracting unit may delimit at least one station, at least one work area, and at least one material area according to the nature of the area according to the shop floor plan. Evaluation area.

Thereby, it is possible to provide on-site management information in conjunction with the exercise information of the worker.

Furthermore, in the worker evaluation system, the area extracting unit may create a shop floor process map based on the shop floor plan, and according to the shop floor process map, define at least one work according to the nature of the area. The bit, at least one work area by process, and at least one material area are used as the evaluation area.

Thereby, the operator evaluation system can be provided with more on-site management information.

Furthermore, in the worker evaluation system, in the case where there is an overlap region between two evaluation regions of the same nature, the evaluation portion is based on the worker in the two evaluation regions. a motion path that assigns a dwell time in the overlap region to a dwell time of the two evaluation regions.

Thereby, even in the case where there is an overlap region between the two regions, it is possible to judge which of the two evaluation regions the work is performed by the worker based on the motion path, and count the stay time in the overlap region into two One of the evaluation areas or the half time of the stay time in the overlap area is separately counted into both evaluation areas, so that a more reasonable behavior analysis can be performed.

Furthermore, in the worker evaluation system, the evaluation unit may determine whether the worker is working or not based on the movement speed of the worker in the evaluation area, thereby evaluating the worker. Working status.

Thereby, it is possible to easily judge whether the worker is in the working state or the non-working state based only on the moving speed of the worker.

Furthermore, in the worker evaluation system, the evaluation unit may perform at least one of the following processes: the average attendance rate Ri in the work time Ti at a certain station of the job is less than the full attendance rate. In the case of 1, by comparing the work time Ti with (R+1)*ST, it is determined whether a long delay occurs in the station, thereby evaluating the work efficiency of the work, wherein R is the The maximum allowable delay rate of the station, ST is the standard working time of the station; in the case where the average attendance rate Ri of the work time Ti in the work station is less than the full attendance rate 1, the actual The ST/(Ri*Ti) of the work relative to the efficiency of the standard work is compared with a given relative efficiency threshold to determine whether the off-duty worker of the work station is a low load, thereby evaluating the work load of the worker By comparing the accumulated departure time in a specified period of a certain station with the accumulated departure time allowed in the specified period, it is determined whether the station has excessive separation from the work, thereby evaluating the operation in the operation. Too much The possibility of delay caused by leaving the post; and comparing the duration of the status of the departed operator of a certain station with the given time threshold to determine whether the station has been out of work for a long time, thereby evaluating the office The departure situation in the operation, or a chart indicating the change of the attendance rate of the worker of a certain station and the cumulative total output over time, to inform the manager of the departure situation and the production progress in the operation.

As a result, the operator evaluation system can evaluate plant management factors such as attendance and workload through different production management methods, and can detect abnormal conditions, thereby providing reasonable management advice to the plant management personnel.

Furthermore, in the worker evaluation system, the area extracting unit may further define the at least one material area for each process; each of the work stations corresponds to a plurality of processes; Whether the time that the worker stays in the material area of the process in a certain process is greater than the first time threshold, or the time in the work station to which the process belongs, the work area of the process, and other areas other than the material area Whether it is greater than the second time threshold, it is determined whether the worker is abnormally leaving the work area, thereby evaluating the working state of the worker.

Thereby, it is possible to judge whether or not the worker is working by tracking the movement of the worker in the work area.

Further, in the worker evaluation system, the product to be operated in the process may be composed of a plurality of product units having the same structure, and the work area of the process may be a plurality of work pieces corresponding to the plurality of product units. a unit section, wherein the evaluation unit combines at least two unit sections in succession to obtain a sub-engineering section when the width of one product unit is smaller than the width of the adult, so that the width of the sub-engineering section is larger than that of the adult The width, and for each of the sub-engineering intervals, based on the dwell time in the sub-engineering interval, whether the sub-engineering time is within a prescribed range based on the standard working time of the same number of product units as the unit block to be synthesized, Whether the job in the engineering section is abnormal.

Thereby, it is possible to determine that the worker is working in the sub-engineering section, and it is possible to further determine whether or not an unexpected difficulty occurs in the work of the sub-engineering section, or an abnormality such as a job of the corresponding product unit is dropped.

Further, in order to solve the above problem, the worker evaluation device of the present invention includes: a memory in which an operator evaluation program and data are stored; and a processor that executes a process of capturing the job site by executing the worker evaluation program. And obtaining the video data; delineating the evaluation area according to at least the shop floor plan of the job site, extracting the evaluation area from the video data by using a spatial transformation relationship between the shop floor plan and the video image; and extracting the evaluation area based on Identifying an operator located in the evaluation area, and acquiring a dwell time and a moving speed of the worker in the evaluation area; and according to the dwell time and the moving speed of the worker in the evaluation area, The behavior of the worker is analyzed, and at least one of the plurality of evaluation methods is used to evaluate the work performed by the worker and the factory management element of the work.

Further, in order to solve the above problem, the worker evaluation method of the present invention includes a video data acquisition step of acquiring video data obtained by photographing a job site, and an area extraction step of delineating an evaluation area based on a shop floor plan of the job site. Extracting the evaluation area from the video data acquired in the video data obtaining step by using a spatial transformation relationship between the shop floor plan and the video image; the worker identification step is based on the extraction in the area extraction step The evaluation area identifies an operator located in the evaluation area, and acquires a dwell time and a moving speed of the worker in the evaluation area; and an evaluation step according to the obtained in the worker identification step The dwell time and the moving speed of the worker in the evaluation area, analyzing the behavior of the worker, and evaluating the work and the work performed by the worker by using at least one of the plurality of evaluation methods The factory management elements of the job.

According to the worker evaluation device and the worker evaluation method of the present invention, the evaluation area is extracted from the video data based on the spatial conversion relationship between the shop floor plan and the video image, and the work of the worker is evaluated for the exercise information of the worker in the evaluation area. And factory management elements. As a result, personnel management capabilities and factory production schedule management capabilities can be improved, and plant management personnel can be further provided with reasonable management advice.

DRAWINGS

Fig. 1 is a block diagram showing an operator evaluation system according to a first embodiment of the present invention.

2 is a system schematic diagram of an operator evaluation system according to the first embodiment of the present invention.

3 is a flowchart of a worker evaluation method executed by the worker evaluation system according to the first embodiment of the present invention.

4A and 4B are views for explaining an example of an evaluation method of the work evaluation system according to the first embodiment of the present invention.

FIG. 5 is a view for explaining an example of an evaluation method of the work evaluation system according to the first embodiment of the present invention.

FIG. 6 is a view for explaining an example of an evaluation method of the work evaluation system according to the first embodiment of the present invention.

FIG. 7 is a view for explaining an example of an evaluation method of the work evaluation system according to the first embodiment of the present invention.

FIG. 8 is a view for explaining an example of an evaluation method of the work evaluation system according to the first embodiment of the present invention.

FIG. 9 is a view for explaining an example of the determination of the evaluation region in the second embodiment of the present invention.

Fig. 10 is a plan view schematically showing an operation performed by an operator in the second embodiment of the present invention.

FIG. 11 is a view for explaining an example of an evaluation method of the work evaluation system according to the second embodiment of the present invention.

FIG. 12 is a view for explaining an example of the determination of the evaluation region in the third embodiment of the present invention.

FIG. 13 is a view for explaining an example of an evaluation method of the work evaluation system according to the third embodiment of the present invention.

Detailed ways

The invention will be described in detail below with reference to the drawings and embodiments.

(First embodiment)

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific embodiment of the present invention will be specifically described with reference to the drawings. This specific example is merely for facilitating the understanding of the worker evaluation system of the present embodiment, and is not intended to limit the operator evaluation system of the present embodiment.

(Structure of the operator evaluation system 1)

First, the structure of the worker evaluation system 1 will be specifically described. FIG. 1 is a block diagram of an operator evaluation system 1 according to the present embodiment. As shown in FIG. 1, the worker evaluation system 1 includes a video data acquisition unit 10, an area extraction unit 20, a worker recognition unit 30, and an evaluation unit 40. Each of the above-described units of the worker evaluation system 1 may be implemented as an independent hardware device, or may be realized by a processor executing a worker evaluation program stored in a memory, for example, which constitutes a worker evaluation device.

The video data acquisition unit 10 acquires video data obtained by photographing the work site, the worker, or the like, for example, from the imaging device. For example, an imaging device for security and monitoring that is installed at a job site such as a factory can be used. For example, an NVR (network video recorder) that is normally installed at a job site can be used for the imaging device, and it is not necessary to operate the device. The person performs an evaluation and additionally sets an additional camera device. At this time, it may be set to perform real-time shooting on the job site or the operator, or may be taken only when the worker moves, to reduce the amount of data, improve the efficiency of subsequent data processing, or may be set to be specific to the job. It is required to perform shooting at a specific time period by setting.

The area extracting unit 20 delimits the evaluation area based on the shop floor plan of the job site, and extracts the evaluation area from the video data by using the spatial conversion relationship between the shop floor plan and the video image. As an example, the area extracting unit 20 classifies the station, the work area, and the material area as the evaluation area according to the nature of the area based on the shop plan map. The area extracting unit 20 maps the position information provided by the shop floor plan into the image based on the transformation relationship between the physical space and the image space which can be obtained after the setting of the camera. Further, it is preferable that the evaluation area is defined based on not only the shop floor plan but also the MES data, the job specification, and the like. Further, it is preferable to delineate the evaluation area in consideration of the range that the worker may reach when completing the corresponding work.

The worker identification unit 30 identifies the worker located in the evaluation area based on the evaluation area extracted by the area extraction unit 20, and acquires the stay time and the moving speed of the worker in the evaluation area. Among these, the worker identification unit 30 can identify the worker by using the identity information of the worker stored in the system such as ERP (enterprise resource planning), ACS (access control system), or MES. Production companies, factories, etc. usually have one or more of the above systems, so there is no need to set up a separate device or system to confirm the identity of the operator.

The evaluation unit 40 analyzes the behavior of the worker based on the stay time and the movement speed of the worker in the evaluation area obtained by the worker identification unit 30, and evaluates the work performed by the worker and the factory management elements of the work. Among them, the factory management elements may include work efficiency, work load, possibility of delay, departure status, production schedule, and the like. The evaluation unit can evaluate the work of the worker and/or the factory management elements with high accuracy and objectiveness in a comprehensive evaluation method, and thus can adapt to various evaluation needs.

Next, the system principle of the worker evaluation system 1 of the first embodiment will be described using FIG. FIG. 2 is a system schematic diagram of the worker evaluation system 1 according to the first embodiment.

As shown in FIG. 2, first, the area extracting unit 20 delimits the evaluation area based on the shop floor plan. In the figure, the station, work area, material area, and aisle position are specified. Specifically, the shop floor plan is digitized to obtain digital information of the shop plan map. For example, in the digital information of the shop planning diagram, the position of the station is represented by S ₁ , S ₂ , ..., S _n1 , and the position of the work area of the i station is S _i O ₁ , S _i O ₂ , ..., S _i O _N2 indicates that the position of the material area of the i station is represented by S _i M ₁ , S _i M ₂ , ..., S _i M _n3 , and the aisle positions are C ₁ , C ₂ , ..., C _n4 , L ₁ , L ₂ , ..., L _n5 means. Here, one station may include a plurality of work areas and a plurality of material areas, and the position S _i of the work station is a combination of the positions of all the work areas of the i station and the positions of all the material areas. In the case of the definition as described above, when the coordinates of the position on the floor plan are represented by the two-dimensional coordinates (a', b'), for example, the position of the station S ₁ can be a' _s11 <x'<a' _{The range of s12} &b' _s11 <y'<b' _s12 is expressed.

When an imaging device that photographs a job site, a worker, or the like is set at a job site, if the coordinates of the position on the video image are represented by two-dimensional coordinates (a", b"), the shop plan and the video image are displayed. There is a positional relationship between:

among them,

Represents the transformation relationship between physical space and image space.

By this positional relationship, an evaluation area in the video data can be obtained. For example, in the evaluation area in the video data, the position of the station is represented by S" ₁ , S" ₂ , ..., S" _n1 , and the position of the work area of the i station is S" _i O ₁ , S" _i O ₂ , ..., S" _i O _n2 means that the position of the material area of the i station is represented by S" _i M ₁ , S" _i M ₂ , ..., S" _i M _n3 , and the aisle position is C" ₁ , C" ₂ , ..., C" _n4 , L" ₁ , L" ₂ , ..., L" _n5 . Similarly, a station can include multiple work areas and multiple material areas, the position of the station S" _i is the i station The combination of the location of all work areas and the location of all material areas. In the case of being defined as described above, for example, the position of the station S" ₁ can be expressed by the range of a" _s11 <x"<a" _s12 &b" _s11 <y"<b" _s12 .

As described above, the area extracting unit 20 maps the shop floor plan to the video image, extracts the evaluation area from the video data, and provides the site management information.

Then, the worker identification unit 30 identifies the worker located in the evaluation area based on the evaluation information of the worker stored in the MES based on the evaluation area extracted by the area extraction unit 20, and records the exercise information of the worker to obtain the The residence time and moving speed in the evaluation area.

Thereafter, the evaluation unit 40 integrates the exercise information of the worker with, for example, the product recorded by the MES, the worker ID, the material ID, and the like, and analyzes the behavior of the worker. Specifically, it is obtained in which area the operator uses what material to process what job content. Further, the operator's work and factory management elements are evaluated by various evaluation methods including the behavior evaluation method and the factory management evaluation method, and the instant information is transmitted to the manager based on the result. For example, “a long delay in a station may occur. The reason for the delay may be that the operator XX left the post for a long time.” Thereby, it is possible to effectively manage the worker, the factory production schedule, and the like.

Next, an operation flow of the worker evaluation method performed by the worker evaluation system will be described with reference to Fig. 3 . FIG. 3 is a flowchart of a worker evaluation method executed by the worker evaluation system 1 according to the first embodiment. As shown in FIG. 3, first, the video data acquisition unit 10 acquires video data obtained by imaging a job site (step S1). Next, the area extracting unit 20 delineates the evaluation area based on at least the shop floor plan of the work site, and extracts the evaluation area from the acquired video data by using the spatial conversion relationship between the shop floor plan and the video image (step S2). Next, the worker recognition unit 30 identifies the worker located in the evaluation area based on the extracted evaluation area, and obtains the stay time and the movement speed of the worker in the evaluation area (step S3). Finally, the evaluation unit 40 analyzes the behavior of the worker based on the stay time and the movement speed of the worker in the evaluation area, and evaluates the work and the work performed by the worker using at least one of the plurality of evaluation methods. Factory management element (step S4).

Next, a specific example in which the evaluation unit of the worker evaluation system of the present invention performs evaluation using a plurality of evaluation methods will be described.

(Specific example 1)

A specific evaluation method of the worker evaluation system will be described with reference to FIGS. 4A and 4B. 4A and 4B are views for explaining an example of an evaluation method of the work evaluation system according to the embodiment.

In field operations, there are cases where two or more regions of the same nature partially overlap. Since the work station, the work area, and the material area are delineated according to the nature of the area, the same nature area refers to between work stations, between work areas, or between material areas. Here, a case where there is an overlap region between the stations will be described as an example. As shown in FIG. 4A, the operator with the ID 001 operates at the station A and the station B, and there is an overlap region between the station A and the station B.

In this case, the evaluation unit 40 judges the work performed by the worker based on the movement path in which the worker moves at the station A and the station B via the overlap region, and distributes the stay time in the overlap region to each worker. The length of stay.

Specifically, as shown in FIG. 4B, first, the operator works at station A before 12 minutes on the time axis, moves to the overlap area at 12 minutes, and returns to the station after staying in the overlap area for about one minute. A work. In this way, when the movement path of the worker is from the station A to the overlap area to the station A, the evaluation unit 40 determines that the worker is staying in the overlap area while performing the work corresponding to the station A. The time is all counted in the stay time of station A.

Also, the operator works at station A before 28 minutes, moves to the overlap area at 28 minutes, and stays in the overlap area for about one minute, then moves to station B and arrives at station B. In this way, when the movement path of the worker is from the station A to the overlap area and then to the station B, the evaluation unit 40 determines that the worker has transferred from the job corresponding to the station A to the job corresponding to the station B. Half of the residence time of the overlap zone is counted as the dwell time of station A, and half of the dwell time of station B is counted.

In addition, the operator works at station B before 50 minutes, moves to the overlap area at 50 minutes, and returns to station B again. In this manner, when the movement path of the worker is from the station B to the overlap area to the station B, the evaluation unit 40 determines that the worker has performed the work corresponding to the station B and the residence time of the overlap area. All counted into the stay time of station B.

Therefore, in the worker evaluation system of the present embodiment, when there is an overlap region between the two regions, it is possible to determine which operation the operator corresponds to based on the movement path of the worker, and it is possible to Accurately analyze the behavior of workers.

(Specific example 2)

A specific evaluation method of the operator evaluation system will be described using FIG. FIG. 5 is a view for explaining an example of an evaluation method of the work evaluation system according to the embodiment.

In field operations, a person's continuous rapid movement means that they move within or between areas rather than doing work.

Therefore, in the present example, the evaluation unit 40 determines whether or not the worker is working in the area based on the movement speed of the worker in a certain area, that is, evaluating the work state of the worker. Specifically, the evaluation unit 40 compares the movement speed of the worker with the threshold value V ₀ . When the moving speed is less than the threshold value V ₀ , it is determined that the worker is working. Further, when the exercise speed is greater than the threshold value V ₀ , it is determined that the worker is moving, that is, not working. Here, the threshold value V ₀ may be set by statistical analysis of the movement speed of the worker, or may be set based on experience.

As described above, the worker evaluation system 1 of the present embodiment can easily evaluate the work state of the worker based on the exercise speed of the worker.

(Specific example 3)

A specific evaluation method of the worker evaluation system will be described using FIG. FIG. 6 is a view for explaining an example of an evaluation method of the work evaluation system according to the embodiment.

In FIG. 6, the case where the station 1 of a certain job is evaluated is demonstrated as an example. As shown in FIG. 6, when the job activation information input from the MES is received, the worker identification unit 30 performs image analysis on the video data acquired by the video data acquisition unit 10, and records the actual number of workers in the station 1. . Then, when the job end information input from the MES is received, the average attendance rate Ri of the station 1 during the work time is obtained based on the number of designated workers of the station 1 input by the management system. The attendance rate at a certain time can be obtained by the ratio of the actual number of workers at that time to the number of designated workers. For example, if the number of designated workers in the station 1 input by the management system is 3, and the actual number of workers in the station 1 obtained by image analysis at a certain time is 2, the attendance rate of the station 1 at that time is 2 /3. The attendance rate is integrated over time and divided by the work time to obtain the average attendance rate Ri of the station 1 during the working time. In addition, at this time, the time to leave the station is also recorded for each worker. For example, "worker A, leaving the post ** minutes, worker B, leaving the post ** minutes" and so on.

Next, the evaluation unit 40 determines whether or not the average attendance rate Ri of the workstation during the work time is less than the full attendance rate of 1. When it is determined that the average attendance rate Ri is not less than the full attendance rate 1, that is, Ri = 1 (NO in the figure), the processing is terminated. At this time, it is also possible to output information indicating the meaning of full attendance to the management system. When it is determined that the average attendance rate Ri is less than the full attendance rate 1 (YES in the figure), it is further determined whether or not the actual work time Ti is greater than (R+1)*ST. Here, ST is the standard working time of station 1, and R is the maximum allowable delay rate of station 1, both of which are input by the management system. In addition, the actual working time Ti can be obtained from the MES.

When the actual work time Ti is less than (R+1)*ST, the evaluation unit 40 determines that the delay is within the allowable range, and may not perform any processing at this time.

When the actual work time Ti is greater than (R+1)*ST, the evaluation unit 40 determines that there is a long delay in the station 1, and transmits the situation to the manager. For example, the management system outputs "long-term delay in station 1. The reason for the delay may be that the operator ** leaves the post for a long time. The list of departures: ...".

As described above, the worker evaluation system 1 of the present embodiment determines whether or not a long delay has occurred, and can evaluate the work efficiency.

Further, when it is determined that the average attendance rate Ri is smaller than the full attendance rate 1 (YES in the figure), it is also possible to further determine whether ST/(Ri*Ti) is greater than the relative efficiency threshold r. Here, ST/(Ri*Ti) is the ratio of actual work to standard work ((1*ST)/(Ri*Ti)), and if the ratio is greater than 1, it means that the actual work efficiency is better than the standard. The relative efficiency threshold r may be a value near 1, preferably a value greater than 1, input by the management system, either a value obtained by statistical analysis or a value obtained empirically.

When ST/(Ri*Ti) is larger than the relative efficiency threshold r, the evaluation unit 40 determines that the workload of the off-duty worker at the station 1 is low, and notifies the manager of the situation. For example, output to the management system that "the off-site operator of station 1 may have a low workload. The list of departures: ...".

If ST/(Ri*Ti) is smaller than the relative efficiency threshold r, the evaluation unit 40 determines that the workload of the off-duty worker at the station 1 may be within the normal range, and may not perform any processing at this time.

As described above, the worker evaluation system 1 of the present embodiment can perform low workload evaluation. Therefore, it is possible to make reasonable suggestions to the manager to appropriately increase the workload.

(Specific example 4)

A specific evaluation method of the operator evaluation system will be described using FIG. Fig. 7 is a view for explaining an example of an evaluation method of the work evaluation system according to the embodiment.

In FIG. 7, the case where the station 1 of a certain job is evaluated is demonstrated as an example. As shown in FIG. 7, first, the evaluation unit 40 performs image analysis on the video image based on the designated number of workers N ₀ of the station 1 input by the management system and the worker identification unit 30 when it is determined to be in the job by the MES. And the actual number of workers in the station 1 obtained continuously calculates the cumulative departure time la corresponding to the actual number of workers in the station A in the A time, and determines whether la is greater than the cumulative amount corresponding to the N ₀ person allowed in the A time. Departure time l ₀ . Here, A is the sampling time period input by the management system.

If la is greater than l ₀ , the evaluation unit 40 determines that there is excessive departure from the station 1 and notifies the manager of the situation. For example, output to the management system that “work station 1 appears too many to leave the post, which may cause production delay, please respond in time.”.

If la is less than l ₀ , the evaluation unit 40 determines that the departure of the station 1 does not cause a production delay. No processing can be done at this time.

As described above, the worker evaluation system 1 of the present embodiment can also perform the possibility of delay estimation. Therefore, reasonable advice can be made to managers to avoid production delays.

(Specific example 5)

A specific evaluation method of the operator evaluation system will be described using FIG. 8 is a view for explaining an example of an evaluation method of the work evaluation system according to the embodiment.

In FIG. 8, the case where the station 1 of a certain job is evaluated will be described as an example. As shown in FIG. 8, the evaluation unit 40 compares the state of the presence of the off-duty worker at the station 1, that is, the state in which the attendance rate of the station 1 is less than the state of the full attendance rate 1, and the predetermined time threshold. Whether there is a long-term off-duty situation in the station 1, thereby evaluating the situation of leaving the job in the operation. At each moment, the attendance of station 1 is the ratio of the actual number of workers at that time to the number of designated workers input from the management system.

Specifically, in the case where the state of the off-duty worker in the station 1 (the state in which the attendance rate of the station 1 is less than the state of the full attendance rate 1) is longer than the time threshold t1, it is determined that the regular short-term departure is performed. This case corresponds to the portion indicated by a small oval in the dotted line in FIG. In addition, when the time of the presence of the off-duty worker in the station 1 (the state in which the attendance rate of the station 1 is less than the state of the full attendance rate 1) is longer than the time threshold t1, it is determined that the employee has left the post for a long time and is notified. Managers are concerned. This case corresponds to the portion indicated by the one-dot chain line ellipse and the broken line large ellipse in Fig. 8. As described above, the worker evaluation system 1 of the present embodiment can evaluate the situation of leaving the post.

Further, it is preferable that, when the state in which the attendance rate of the station 1 is less than 1 and greater than 0 continues for a time longer than the time threshold t1, it is determined that the employee is out of the post for a long time, and the manager is notified of the attention. This case corresponds to the portion indicated by the one-dot chain line ellipse in FIG. On the other hand, when the state in which the attendance rate of the station 1 is equal to 0 continues for a time longer than the time threshold t2 greater than the time threshold t1, it is determined that the regular long-term departure is performed, for example, the lunch break time. This case corresponds to the portion indicated by the dashed large ellipse in FIG. In this way, the worker evaluation system 1 can perform a more accurate evaluation.

Further, it is preferable that the evaluation unit 40 outputs a graph indicating the change in the attendance rate and the cumulative total output of the worker of the station 1 with time, and at least highlights the long-time departure status. Alternatively, it is also possible to distinguish between regular short-term leave and lunch breaks and unconventional long-term leave. That is to say, the chart shown in Fig. 8 is presented to the manager. Through such visualization, managers can more intuitively understand the situation of leaving the post and the progress of production.

The plurality of evaluation methods of the evaluation unit of the present embodiment have been described above by a plurality of specific examples. However, it is not limited to evaluating all the elements by all the evaluation methods, and it is only necessary to evaluate at least one evaluation element by at least one evaluation method, or to evaluate the desired element by an appropriate evaluation method according to the demand.

Further, in the above-described plurality of specific examples, the workstation has been described as an example. However, it is not limited to this, and is equally applicable to evaluations of other regions.

(Second embodiment)

Hereinafter, an operator evaluation system according to a second embodiment of the present invention will be described.

In the field work, each process is also performed at a specified position according to the plan, and the work area of the process can be confirmed according to the specified work content of the process. Therefore, the shop floor plan can be used to develop the shop floor plan. In the present embodiment, the area extracting unit defines the station, the work area according to the process, and the material area as the evaluation area based on such a shop floor distribution map. Except for this point, the present embodiment is the same as the first embodiment. Therefore, the description is centered on different points.

FIG. 9 is a view for explaining an example of the determination of the evaluation region in the second embodiment of the present invention. In Fig. 9, the work areas of the steps 1 to 4 are indicated by broken lines, which corresponds to the supply of the work area for each step. Further, ID002, ID005, ID012, and ID013 shown in Fig. 4 are IDs of the worker, and a solid line frame divided into upper and lower portions indicates a material box, and a large solid line frame indicates a workpiece. In fact, such a process map is based on a shop floor plan. Usually, one station (not shown) corresponds to a plurality of processes, and each process can be divided according to space or an operator.

Therefore, it can be said that the workshop process map is a special workshop plan. Such a shop floor map can also be mapped into the image space so that the operator evaluation system can provide more on-site management information.

(Specific example)

Next, a specific evaluation method of the worker evaluation system of the present embodiment will be described with reference to FIGS. 10 and 11 . Fig. 10 is a schematic plan view for explaining an operation performed by an operator. FIG. 11 is a view for explaining an example of an evaluation method of the work evaluation system according to the embodiment.

In FIG. 10, a case where the process 3 performed in the station 1 of a certain job is evaluated will be described as an example. As shown in FIG. 10, it is assumed that the work related to the product of the ID 501 is performed in the work area W3 of the process 3, for example. The product consists of n product units 1 to n having the same structure, and correspondingly, the work area W3 is also composed of n unit sections which are identical to each other. Further, the contents of the work for each of the product units n to 1 constituting the step 3 are the same. In addition, it is assumed here that the width of one product unit in the figure is smaller than the width of an adult. In this case, in the specific example, a sub-engineering interval W3A1, W3A2, ..., W3An is synthesized by using two or more (two in the figure) unit sections to ensure that the sub-engineering sections W3A1, W3A2, ... W3An are respectively The width is greater than the adult width. This is because only the area where the work is performed, that is, the width of the sub-engineering section is larger than the width of the adult, and can accommodate an operator to determine whether the worker is located in the area.

In this way, the evaluation unit 40 can determine whether or not the job corresponding to each sub-engineering zone is normal based on the dwell time of the worker in each of the sub-engineering sections W3A1, W3A2, ..., W3An. As an example, the dwell time of the worker 001 in the work area W3 of the process 3 is shown in FIG. The evaluation unit 40 sets the number of unit sections (two in this example)* the standard working time of the product unit in the stay time according to the time that the worker stays in each of the sub-engine areas W3A1, W3A2, ..., W3An. When the reference is within a certain range, it is determined that the job corresponding to the sub-engineering section is normal. The certain range can be determined by the upper limit value and the lower limit value input by the management system, and the upper limit value and the lower limit value can be obtained by statistical analysis or experience. In addition, in the case where the residence time exceeds the above-mentioned range, that is, greater than the upper limit or less than the lower limit, based on (the number of unit sections to be synthesized (two in this example) * standard work time of the product unit) It is determined that the job corresponding to the sub-engineering section is abnormal. Here, if the dwell time in a sub-engineering section is too long (greater than the upper limit), there may be a situation that is difficult for the operator to solve, and the operator is lazy, and the dwell time is too short (less than the lower limit). It is possible that the corresponding product unit is dropped.

As described above, by tracking the work time of the sub-project, it is possible to determine whether the sub-engineering operation is normal.

The specific example of the evaluation method of the second embodiment has been described above. However, the present invention is not limited thereto, and one or more evaluation methods described in a plurality of specific examples of the first embodiment can be employed in the present embodiment.

(Third embodiment)

Hereinafter, an operator evaluation system according to a third embodiment of the present invention will be described.

In the second embodiment, the work area is defined for each process. In the present embodiment, the work area and the material area are defined for each process, and the same work station corresponds to a plurality of processes, and each process may be based on Space or workforce to divide. Except for this point, the present embodiment is the same as the first embodiment and the second embodiment. Therefore, the description will be made focusing on the differences described above, and overlapping description will be omitted.

FIG. 12 is a view showing an example of the determination of the evaluation region in the third embodiment of the present invention. The work area of the process 1 (indicated by dots), the material area of the process 1 (indicated by long lines), and the station 1 (indicated by hatched areas) are shown in FIG. In the figure, only the work area and the material area of the process 1 are shown with respect to the station 1, but the work area and the material area of the other processes of the station 1, and the work area and the material area of the process in other stations are also It can also be expressed.

The evaluation area is defined as described above, and the worker evaluation system of the present embodiment can provide more on-site management information.

(Specific example)

Next, a specific evaluation method of the worker evaluation system of the present embodiment will be described with reference to FIG. FIG. 13 is a view for explaining an example of an evaluation method of the work evaluation system according to the embodiment.

In FIG. 13, a case where the process 1 performed in the station 1 of a certain job is evaluated will be described as an example. As shown in FIG. 13, the worker identification unit 30 tracks the movement of the worker and obtains the stay time of the worker in each area over time. The evaluation unit 40 determines whether or not it is an abnormal departure from the work area based on the stay time in each area, thereby evaluating the work status of the worker.

Specifically, in the case where the worker who performs the process 1 as shown by the dot in FIG. 13 stays in the material area of the process 1 is less than the time threshold T1, the evaluation unit 40 regards the worker as the material to be taken. Judging as normal behavior. On the other hand, the worker who performs the process 1 as shown by the one-dot chain line in FIG. 13 stays in the material area for more than the time threshold T1, or in addition to the work area and the material area of the station 1. When the time in which the other area stays is greater than the time threshold T2, it is determined that the worker has left the work area abnormally, and the management department is notified. Here, the two time thresholds T1, T2 are both input by the management system and are values that can be determined by statistical analysis or experience.

As described above, in the present embodiment, it is possible to judge the operation state by tracking the movement of the worker.

The specific example of the evaluation method of the third embodiment has been described above. However, the present embodiment is not limited to the one or more evaluation methods described in the specific examples of the first embodiment and the second embodiment.

The embodiments and specific examples of the present invention have been described above with reference to the drawings. The embodiments and specific examples described above are merely specific examples of the invention, and are not intended to limit the scope of the invention. A person skilled in the art can make various modifications, combinations and elements of the embodiments without departing from the scope of the invention. For example, in each of the embodiments, the video acquisition unit may be provided in each of the area extraction unit, the worker identification unit, and the evaluation unit.

Claims (10)

1. An operator evaluation system characterized by comprising:

   The video data acquisition unit acquires video data obtained by capturing a job site;

   The area extracting unit extracts the evaluation area based on at least the shop floor plan of the work site, and extracts the evaluation area from the video data acquired by the video data obtaining unit by using a spatial conversion relationship between the shop floor plan and the video image;

   The worker identification unit identifies an operator located in the evaluation area based on the evaluation area extracted by the area extraction unit, and acquires a stay time and a movement speed of the worker in the evaluation area;

   The evaluation unit analyzes the behavior of the worker based on the dwell time and the movement speed of the worker in the evaluation area obtained by the worker identification unit, and uses at least one of a plurality of evaluation methods. The evaluation method evaluates the work performed by the worker and the factory management elements of the work.
2. The worker evaluation system according to claim 1, wherein

   The area extracting unit delimits at least one station, at least one work area, and at least one material area as the evaluation area according to the nature of the area according to the workshop plan.
3. The worker evaluation system according to claim 1, wherein

   The area extracting unit formulates a shop process map according to the shop floor plan, and according to the shop process map, delineates at least one station, at least one work area according to the process, and at least one material area according to the nature of the area. As the evaluation area.
4. The worker evaluation system according to claim 2 or 3, characterized in that

   In the case where there is an overlap region between two evaluation regions of the same nature, the evaluation portion distributes the dwell time in the overlap region according to the movement path of the worker in the two evaluation regions The residence time to the two evaluation areas.
5. The worker evaluation system according to claim 2 or 3, characterized in that

   The evaluation unit determines whether the worker is operating based on the moving speed of the worker in the evaluation area, thereby evaluating the working state of the worker.
6. The worker evaluation system according to claim 2 or 3, characterized in that

   The evaluation unit performs evaluation using at least one of the following evaluation methods:

   When the average attendance rate Ri in the work time Ti of the work station is less than the full attendance rate 1, the work time Ti is compared with (R+1)*ST to determine the work. Whether there is a long delay in the bit, thereby evaluating the working efficiency of the job, wherein R is the maximum allowable delay rate of the station, and ST is the standard working time of the station;

   In the case where the average attendance rate Ri in the work time Ti of the work station is less than the full attendance rate 1, the ST/(Ri*Ti) indicating the efficiency of the actual work with respect to the standard work is given Comparing the relative efficiency thresholds to determine whether the off-duty operator of the station is a low load, thereby evaluating the workload of the worker;

   By comparing the accumulated departure time in a specified period of a certain station with the accumulated departure time allowed in the specified period, it is determined whether the station has too many out-of-job conditions, thereby evaluating the operation in the operation. The possibility of delay caused by excessive separation; and

   Comparing the duration of the status of the employee leaving the work station with the given time threshold to determine whether the work station has a long-term departure status, thereby evaluating the off-duty situation in the operation, or A graph indicating the attendance of the operator of a certain station and the change of the cumulative total output over time is output to inform the manager of the departure status and production progress in the operation.
7. The worker evaluation system according to claim 3, characterized in that

   The area extracting unit further delimits the at least one material area for each process;

   Each of the stations corresponds to a plurality of processes;

   The evaluation unit is based on whether the time that the worker stays in the material area of the process in a certain process is greater than the first time threshold, or in the work station to which the process belongs, the work area and the material area outside the process Whether the time of staying in other areas is greater than the second time threshold is to determine whether the worker is abnormally leaving the work area, thereby evaluating the working state of the worker.
8. The worker evaluation system according to claim 3, characterized in that

   The product to be operated in the process is composed of a plurality of product units having the same structure, and the work area of the process is composed of a plurality of unit sections corresponding to the plurality of product units.

   The evaluation unit combines at least two consecutive unit sections to obtain a sub-engineering section when the width of one product unit is smaller than the width of the adult, so that the width of the sub-engineering section is larger than the width of the adult, and Determining, in each of the sub-engineering intervals, whether the dwell time in the sub-engineering interval is within a predetermined range based on the standard operating time of the same number of product units as the unit segment to be synthesized, Whether the job is abnormal.
9. An operator evaluation device characterized by comprising:

   a memory storing an operator evaluation program and data;

   The processor performs the following processing by executing an operator evaluation program:

   Obtaining video data obtained by shooting a job site;

   Determining an evaluation area according to at least a shop floor plan of the job site, and extracting the evaluation area from the video data by using a spatial transformation relationship between the shop floor plan and the video image;

   Identifying an operator located in the evaluation area based on the extracted evaluation area, and acquiring a stay time and a movement speed of the worker in the evaluation area;

   The behavior of the worker is analyzed according to the residence time and the movement speed of the worker in the evaluation area, and the operation performed by the worker is evaluated by at least one of a plurality of evaluation methods And the factory management elements of the operation.
10. An operator evaluation method, comprising:

    a video data obtaining step of obtaining video data obtained by photographing a job site;

    a region extracting step of delineating an evaluation region according to at least a shop floor plan of the job site, and extracting the evaluation region from the video data acquired in the video data obtaining step by using a spatial transformation relationship between the shop floor plan and the video image ;

    a worker identification step of identifying an operator located in the evaluation area based on the evaluation area extracted in the area extraction step, and acquiring a stay time and a movement speed of the worker in the evaluation area; as well as

    An evaluation step of analyzing behavior of the worker according to a dwell time and a moving speed of the worker in the evaluation area obtained in the worker identification step, and using at least one of a plurality of evaluation methods An evaluation method evaluates the work performed by the worker and the factory management elements of the work.

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