JP4905444B2 - Data association apparatus and control method therefor, data association apparatus control program, and recording medium recording the program - Google Patents

Description

  The present invention relates to a data associating device for associating a set of measurement data obtained by measuring a plurality of manufacturing objects between a plurality of measurement facilities in a production line provided with a plurality of measurement facilities, and a control method thereof. is there.

  Conventionally, efforts have been made to improve the quality of products, and various quality control methods have been proposed.

  For example, in order to realize traceability, a method of managing an intermediate product product by attaching an identification code such as a barcode to an intermediate product or a base on which the intermediate product is placed has been proposed. Further, in order to realize traceability, a method of identifying intermediate products in the order of intermediate products input into each manufacturing process has been proposed.

  However, in the case of the above-described method of managing by attaching an identification code, there is a problem that the manufacturing cost increases. In addition, defective products are often extracted, reworked, and re-introduced in the manufacturing process. For this reason, the intermediate product may not be correctly identified by the above method of identifying the intermediate product in the order of the intermediate product. In this case, regarding each intermediate product, it is difficult to strictly associate the measurement data measured in the first manufacturing process with the measurement data measured in the second manufacturing process.

  Even in such a case, for a set of a plurality of intermediate products, the measurement data of a certain manufacturing process and the measurement data of another manufacturing process are roughly associated to clarify the causal relationship between the processes. It is hoped that.

  For example, Patent Document 1 discloses a display device that displays a profile of product quality such as paper and film. The display device shifts and displays the operation amount screen of the operation unit and the measurement value screen of the measurement unit in a time-shifted manner until the product reaches the measurement unit from the operation unit.

  Patent Document 2 discloses a manufacturing management apparatus that predicts a manufacturing period and the number of products when manufacturing a product on a manufacturing line. The manufacturing management device calculates the average waiting time of the product based on the average lot arrival interval and the length of the queue, calculates the work period of the product based on the calculated average waiting time and the average lot processing interval, and yield. The number of products manufactured by is calculated.

  Patent Document 3 discloses a method for measuring a profile in the width direction of a sheet-like product. In this method, the thickness is measured and stored at a fixed period, a reference point is provided on the rotary die or pinch roll, the stored data is cut out based on the reference signal that has passed this reference point, and the profile is calculated. is doing. Further, the rank of the data to be cut out is shifted to the past by the number of data corresponding to the transportation time.

In addition, the inventors of the present application disclose a quality control apparatus that controls a manufacturing process in order to manufacture a product having a predetermined quality in Patent Document 4. The quality control apparatus collects measurement data measured by a plurality of measuring devices provided in the manufacturing process, stores the collected measurement data together with the measured time or the collected time, and collects the measured time or the collected time. A set of measurement data of the measurement devices is associated with the time by considering a dead time generated between the measurement devices.
JP 2002-138384 (released May 14, 2002) JP 2003-109885 (released on April 11, 2003) JP-A-2004-347558 (released on December 9, 2004) JP 2005-339498 A (released on December 8, 2005)

  However, the conventional apparatus as described above has the following problems. That is, conventionally, it has been difficult to say that the degree of change in measurement data when manufacturing conditions are changed is displayed in an easy-to-understand manner for field workers.

  For example, there are usually a large number of measurement data before the change, but there are only a few measurement data after the change immediately after the change. On the other hand, field workers want to know the effects of changes in manufacturing conditions as soon as possible. Therefore, conventionally, a display relating to a sufficient amount of measurement data before the change and an insufficient amount of measurement data after the change has been performed. However, in such a display, a field worker or the like is affected by a large amount of measurement data before the change, and the state after the change may be erroneously grasped.

  Further, in the automatic assembly process, there are irregular equipment stoppages, buffers between processes, etc., and therefore the dead time between processes and the number of buffers change. For this reason, in the conventional apparatus as described above, the accuracy of the association between the measurement data between the processes and the association between the sets of the measurement data between the processes is lowered, and the analysis accuracy of the causal relationship is lowered. It was.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a data association apparatus and the like in which measurement data between processes or a set of measurement data are associated with each other. .

  A data association apparatus according to the present invention is a data association apparatus comprising data association means for associating measurement data measured by different measurement facilities in a production line provided with a plurality of measurement facilities, In order to solve the problem, a storage unit for storing information on the number of wastes generated between the different measurement facilities is provided, and the data association unit uses the waste number to measure one of the different measurement facilities. The measurement data measured by the other of the different measurement facilities corresponding to the measured data is specified.

  Further, the control method of the data association apparatus according to the present invention is a data association apparatus for associating measurement data measured by different measurement facilities in a production line provided with a plurality of measurement facilities, wherein the different measurement is performed. A method of controlling a data association apparatus including a storage unit that stores information on the number of wastes generated between facilities, in order to solve the above-described problem, one of the different measurement facilities is measured using the waste number. By specifying the measurement data measured by the other of the different measurement facilities corresponding to the measured data, the measurement data measured by the different measurement facilities are associated with each other.

  According to the above configuration and method, the measurement data measured by the other of the different measurement facilities corresponding to the measurement data measured by one of the different measurement facilities is specified by using the waste number. Therefore, it is possible to satisfactorily associate measurement data between different measurement facilities using only the waste number without using the marker, the section data, and the synchronization data.

  The data association apparatus according to the present invention is a data correspondence that associates a set of measurement data obtained by measuring a plurality of manufacturing objects by the measurement facility between the plurality of measurement facilities in a production line provided with the plurality of measurement facilities. In order to solve the above-mentioned problem, the synchronization data creating means for creating the synchronization data that is a set of the measurement data for one of the different measurement facilities and the synchronization for the other of the different measurement facilities Corresponding synchronization data creation means for creating synchronization data corresponding to the synchronization data created by the data creation means, the correspondence synchronization data creation means created by the synchronization data creation means for the other measuring equipment A plurality of synchronization data candidates having the same number of elements as the synchronization data are created, and the synchronization data related to the one measurement facility and the other By calculating the correlation coefficient with the synchronization data candidate for the measurement equipment and repeating this for each synchronization data candidate, the synchronization data candidate with the maximum absolute value of the correlation coefficient is identified, and this is measured with the other measurement It is characterized by using synchronized data related to equipment.

  Further, the control method of the data association apparatus according to the present invention is a manufacturing line provided with a plurality of measurement facilities, wherein a set of measurement data obtained by measuring the plurality of manufacturing objects by the measurement facility is used as the plurality of measurement facilities. A method of controlling the data association apparatus that associates between the synchronization data creation step of creating the synchronization data that is a set of the measurement data with respect to one of the different measurement facilities, in order to solve the problem A corresponding synchronization data creation step for creating synchronization data corresponding to the synchronization data created in the synchronization data creation step with respect to the other of the measurement equipment, and the corresponding synchronization data creation step includes the other measurement equipment A plurality of synchronization data candidates having the same number of elements as the synchronization data created in the synchronization data creation step. And calculating the correlation coefficient between the synchronous data related to the one measuring equipment and the synchronous data candidate related to the other measuring equipment, and repeating this for each synchronous data candidate, the absolute value of the correlation coefficient is maximized. A synchronization data candidate is identified, and this is used as synchronization data related to the other measuring equipment.

  According to said structure and method, synchronous data are produced regarding one measuring equipment, and a some synchronous data candidate is produced regarding the other measuring equipment. Then, a correlation coefficient between the synchronization data and the synchronization data candidate is calculated, and this is repeated for each synchronization data candidate, thereby specifying a synchronization data candidate having the maximum absolute value of the correlation coefficient, Synchronous data on the other measuring equipment. Therefore, it is possible to satisfactorily associate the synchronization data between different measuring facilities using only the correlation coefficient without using the marker and the section data.

  The data association apparatus according to the present invention is a data correspondence that associates a set of measurement data obtained by measuring a plurality of manufacturing objects by the measurement facility between the plurality of measurement facilities in a production line provided with the plurality of measurement facilities. In order to solve the above-mentioned problem, the data acquisition means for acquiring the measurement data measured by the measurement equipment, and the marker detection means for detecting the marker put in the production line Section data creation means for obtaining measurement data of a plurality of manufacturing objects included between the markers detected by the marker detection means from the data acquisition means, and creating section data which is a set of the obtained plurality of measurement data; Comprising section data association means for associating the section data created by the section data creation means with different measuring equipments. It is a symptom.

  Further, the control method of the data association apparatus according to the present invention is a manufacturing line provided with a plurality of measurement facilities, wherein a set of measurement data obtained by measuring the plurality of manufacturing objects by the measurement facility is used as the plurality of measurement facilities. A method for controlling a data association apparatus for associating between each of the measurement facilities, a data acquisition step for acquiring measurement data measured by the measurement facility, and a marker detection step for detecting a marker put on the production line Including a section data creation step of obtaining measurement data of a plurality of manufacturing objects included between the detected markers and creating section data that is a set of the plurality of acquired measurement data. The method further includes a section data association step for associating between different measurement facilities.

  According to the configuration and method described above, measurement data of a plurality of manufacturing objects included between markers is acquired, section data that is a set of the acquired plurality of measurement data is created, and the created section data is measured differently. Corresponds between facilities. The plurality of manufacturing objects included between the markers may be slightly extracted or added, but it is highly possible that they are the same as a whole. Therefore, the section data correlated between different measuring equipments is a good correlation.

  As the marker, an arbitrary object can be used, but a marker that can easily be determined as a manufacturing object by a measurement facility is suitable. In addition, a marker that is inexpensive and can be used repeatedly is suitable from the viewpoint of manufacturing cost, and a marker that has the same shape as the object to be manufactured from the transportation side on the manufacturing line has less trouble during operation. Is suitable. Non-standard manufacturing objects such as non-conduction are also suitable as markers. In this case, the marker can be easily found in the inspection process and can be automatically removed from the manufacturing object.

  Also, an ID tag or the like equipped with an identifier that can be detected without contact can be used as a marker. However, in this case, it is necessary to provide a reading device for reading the identifier in the measurement facility.

  In the data association apparatus according to the present invention, with respect to a certain measurement facility, the synchronization data creation means for creating synchronization data, which is a set of a small number of measurement data compared to the section data, and the other measurement facility, the above Corresponding synchronization data creation means for creating synchronization data corresponding to the synchronization data created by the synchronization data creation means using the section data associated between the plurality of measurement facilities by the section data association means May be. In this case, it is possible to maintain a good association between the synchronization data associated with different measurement facilities.

  In the data association apparatus according to the present invention, the correspondence synchronization data creation means includes, for the certain measurement equipment, elements located in a predetermined order in the synchronization data created by the synchronization data creation means are the section data. The order ratio, which is the ratio of the order of positioning to the number of elements in the section data, is calculated, and the number of elements in the section data of the other measuring equipment associated with the section data is multiplied by the order ratio. The order in the section data of the other measuring equipment may be calculated, and the synchronization data may be created so that the elements of the calculated order are located in the predetermined order.

  Further, these synchronization data creation methods can be combined. In this case, the synchronization data may be created by any one creation method, and the created synchronization data may be adjusted by another creation method.

  For example, using at least one of the dead time and the number of wastes generated between the different measurement facilities, and the correlation coefficient between the synchronization data created by the synchronization data creation unit and the corresponding synchronization data creation unit, For example, it further includes synchronization data adjustment means for adjusting the synchronization data created by the corresponding synchronization data creation means.

  Each means in the data association apparatus can be operated on a computer by a data association apparatus control program. Furthermore, the data association device control program can be executed on an arbitrary computer by storing the data association device control program in a computer-readable recording medium.

  As described above, the data association apparatus according to the present invention specifies the measurement data measured by the other of the different measurement facilities corresponding to the measurement data measured by one of the different measurement facilities by using the waste number. Therefore, it is possible to satisfactorily associate the measurement data between different measurement facilities using only the waste number without using the marker, the section data, and the synchronization data.

  In addition, as described above, the data association apparatus according to the present invention calculates the correlation coefficient between the synchronization data related to one measurement facility and the synchronization data candidate related to the other measurement facility, and this is calculated for each synchronization data candidate. By repeating, the synchronous data regarding the other measuring equipment is obtained. Therefore, it is possible to satisfactorily associate the synchronization data between different measuring facilities using only the correlation coefficient without using the marker and the section data.

  Further, as described above, the data association apparatus according to the present invention acquires measurement data of a plurality of manufacturing objects included between markers, creates section data that is a set of the acquired plurality of measurement data, Since the created section data is associated between different measurement facilities, there is an effect that the section data associated between the different measurement facilities is in good association.

  An embodiment of the present invention will be described with reference to FIGS. First, an outline of the present embodiment will be described with reference to FIG.

  FIG. 1 shows a schematic configuration of the data display system of the present embodiment. This data display system (data display device, data association device) 10 supports measurement data measured by a plurality of measurement facilities Yj (j is an integer of 1 or more) provided in the production line ML between different measurement facilities. In addition, the associated measurement data or data based on the measurement data is displayed.

  First, the manufacturing equipment S, Xi, Yj (i is an integer of 1 or more) provided in the manufacturing line ML will be described. As shown in FIG. 1, an input facility S is provided at the upstream end of the production line ML, and a plurality of processing facilities Xi and a plurality of measuring facilities Yj are provided downstream thereof.

  Note that the subscript i indicates the order of the processing facilities arranged on the downstream side with reference to the input facility S, and is indicated by an alphabet when indicating a plurality or all of the processing facilities. Similarly, the subscript j indicates the order of the measuring equipment arranged on the downstream side with reference to the input equipment S, and is indicated by an alphabet when indicating a plurality or whole measuring equipment.

  The input equipment S is for inputting a work (manufactured object) to the production line ML. The input equipment S generates an input signal and transmits it to the marker control device 11 (marker input control means) every time a work is input to the production line ML.

  In this embodiment, when the input equipment S receives the marker input signal from the marker control device 11, the input equipment S inputs the marker into the production line ML instead of the workpiece. The marker is used to classify measurement data measured by the measurement facility Yj. Details of the marker will be described later.

  The processing equipment Xi is for processing a workpiece. Specifically, the processing equipment Xi processes the conveyed workpiece according to a predetermined procedure, and changes the processing conditions according to an instruction from the field worker W as necessary. For example, by changing processing conditions such as bending, pressure, and temperature, it is possible to adjust quality characteristics such as workpiece shape and operation characteristics.

  The measuring equipment Yj is for measuring workpieces. Specifically, the measuring equipment Yj measures quality characteristics such as the shape dimension and operation characteristics of the conveyed workpiece, and transmits the measurement data to the data collection device (data association device) 12 together with the measurement time. is there.

  Usually, a plurality of measurement items are often measured with the same measurement facility. In this case, a plurality of measurement data is created for each workpiece at the same measurement equipment, but in the present embodiment, the plurality of measurement data are synchronized and completely associated with each other. To do.

  In this embodiment, when the marker has been transported, the measurement equipment Yj measures the marker in the same manner as the workpiece, and transmits the measurement data to the data collection device 12 together with the measurement time.

  Next, an outline of the data display system 10 will be described. As shown in FIG. 1, a data display system 10 includes a marker control device 11, a data collection device 12, a line information storage device (storage unit) 13, a data synchronization device (data association means, data association device) 14, The configuration includes a condition input device 15, a data comparison device (data comparison means) 16, and a data display device (display unit, display control means) 17.

  The data collection device 12 collects measurement data measured by each measurement facility Yj. Further, when the data collection device 12 detects a marker input from the input equipment S to the production line ML according to an instruction from the marker control device 11, it creates section data that is a set of a plurality of measurement data included between the markers. .

  Next, the data collection device 12 associates the section data between different measurement facilities using the marker. Then, the data collection device 12 causes the data display device 17 to display a plurality of section data associated with each measurement facility. Thereby, the field worker W can compare the section data matched between each measurement equipment easily.

  The data synchronizer 14 uses the section data to create synchronization data that is a collection of measurement data that is smaller than the section data and that is associated with different measurement equipment. . The data synchronization device 14 causes the data display device 17 to display a plurality of synchronization data associated with each measurement facility or its statistics. Thereby, the field worker W can compare easily the synchronous data matched between each measurement equipment, or the statistics. Moreover, the field worker W can grasp | ascertain the time transition of synchronous data or its statistics easily.

  When the field worker W instructs the condition input device 15 to change the manufacturing condition of a certain manufacturing facility, the data comparison device 16 is a plurality of synchronization data associated with each measuring facility, and the data comparison device 16 Synchronous data before and after the change or its statistics are created as comparison data. The data comparison device 16 displays the created comparison data on the data display device 17. Thereby, the field worker W can compare easily the synchronous data before and behind a change, or its statistics.

  Next, details of various devices 11 to 17 included in the data display system 10 will be described.

  First, details of the marker control device 11 will be described. The marker control device 11 instructs the input equipment S to input a marker. Specifically, the marker control device 11 receives the workpiece input signal from the input equipment S, counts the number of workpieces input, and outputs a marker input signal for instructing marker input for each predetermined input number. It is transmitted to the input equipment S. Thus, since the number of workpieces inserted between the markers is constant, the number of elements (measurement data) included in the section data created by the data collection device 12 using the markers is substantially constant. This can improve the accuracy of association of measurement data.

  The marker control device 11 also transmits the marker insertion signal to the data collection device 12. It should be noted that the marker insertion interval is expected to increase or decrease in the middle of the number of measurement data included in the set to be associated in order to facilitate generation of synchronization data by the data synchronization device 14 described later. It is desirable that it is an integer multiple of the sum of the number of workpieces to be added.

  Here, the marker will be described. As the marker, a marker that can be easily discriminated by the measuring equipment Yj as not being a workpiece is suitable. For example, when the measuring equipment Yj measures the electrical characteristics, those that can be easily discriminated by the electrical characteristics are suitable as markers, and when the measuring equipment Yj measures the dimensional accuracy, What can be identified is suitable as a marker. In addition, when the measuring equipment Yj recognizes the shape, a unique shape provided on the workpiece is suitable as the marker.

  In addition, a marker that is inexpensive and can be used repeatedly is suitable from the viewpoint of manufacturing cost, and a marker that has the same shape as the workpiece from the surface of conveyance on the manufacturing line ML is suitable because there are few troubles during operation. ing. Non-standard workpieces that are not conductive or heavy are also suitable as markers. In this case, the marker can be easily found in the inspection process and can be automatically removed from the finished product.

  For example, when the workpiece is an electronic component, an electronic component (dummy) designed so as not to conduct two normally conducting terminals may be used as a marker. At this time, it is possible to determine whether or not the measuring equipment Yj is a marker by performing a continuity check of the two terminals. Further, since the marker can be easily found in the inspection process and can be automatically removed as out of specification, the marker is not mixed into the product.

  In addition, it is conceivable to use an identifier equipped with an identifier that can be detected in a non-contact manner such as a barcode or an ID tag as a marker. However, in this case, it is necessary to provide a reading device for reading the identifier in the measurement equipment Yj.

  By the way, it is conceivable that the field worker manually inserts the marker at every lot break. However, in this case, forgetting to insert the marker, variation in time spent for the insertion, and the like occur, so that the accuracy in associating the measurement data measured by the different measurement equipment Yj is lowered. Moreover, since the number of work processes for field workers increases, the manufacturing cost increases.

  Usually, it is conceivable to insert a marker for every several hundred workpieces. In this case, since the interval between the markers is wide, it is not difficult to associate the data without distinguishing the markers. However, it is conceivable to insert markers more densely (for example, several tens). In this case, it is desirable to provide the markers with identifiers for identifying the markers. However, since markers are inserted instead of workpieces, the production efficiency decreases as the number of markers inserted relative to the number of workpieces increases.

  For example, when one marker is inserted for about 100 workpieces, one defective product is generated for about 100 workpieces. Therefore, the production efficiency is reduced by about 1%. On the other hand, when one marker is inserted for about 1000 workpieces, the reduction in production efficiency is about 0.1%.

  Further, in the present embodiment, the marker control device 11 inserts a marker every predetermined number of input workpieces. However, a marker may be input every predetermined period, or according to other conditions or randomly. A marker may be inserted into the. However, in this case, as described above, it is necessary to provide a restriction on the marker control device 11 such that a marker is inserted after approximately 100, preferably several hundred, workpieces are input.

  Next, the data collection device 12 will be described with reference to FIGS. FIG. 2 shows a schematic configuration of the data collection device 12. As illustrated, the data collection device 12 includes a measurement data acquisition unit (data acquisition unit) 21, a marker detection unit (marker detection unit) 22, a section data generation unit (section data generation unit) 23, and a section data association unit. (Section data association means) 24 is provided. In addition, the measurement data acquisition part 21, the marker detection part 22, and the area data creation part 23 are provided for every measurement equipment Yj.

  The measurement data acquisition unit 21 acquires measurement data Cj measured by the corresponding measurement equipment Yj. The measurement data acquisition unit 21 transmits the acquired measurement data Cj to the marker detection unit 22 and the section data creation unit 23.

  The marker detection unit 22 detects a marker from the measurement data Cj received from the measurement data acquisition unit 21. The marker detection unit 22 notifies the section data creation unit 23 that a marker has been detected. The marker can be detected, for example, when the received measurement data is out of the standard value.

  Further, the marker detection unit 22 receives a marker insertion signal from the marker control device 11 and checks whether or not the corresponding marker has reached using the received marker insertion signal. Thereby, it can prevent misrecognizing a workpiece | work as a marker, or misrecognizing a marker as a workpiece | work.

  In addition, the marker detection part 22 receives the marker detection signal which shows having detected the marker from the marker detection part 22 for measurement facilities adjacent to an upstream instead of receiving a marker insertion signal from the marker control apparatus 11. The received marker detection signal may be used to check whether the corresponding marker has arrived. In this case, it is possible to check whether or not the corresponding marker has arrived according to the installation order of the measuring equipment Yj. Furthermore, the marker detection unit 22 for the last measurement facility may transmit the marker detection signal to the marker control device 11. In this case, the marker control device 11 can detect that a certain marker has passed through all the measurement equipments Yj, and then can insert the next marker.

  The section data creation unit 23 creates section data that is a set of a plurality of measurement data included between the markers detected by the marker detection unit 22. The section data creation unit 23 transmits the created section data to the section data association unit 24.

  The marker may be detected by the measurement equipment Yj. In this case, the marker detection part 22 should just be provided in the measurement equipment Yj, and the measurement equipment Yj should just transmit the measurement data which show a marker to the data collection device 12, if a marker is detected. Moreover, the section data creation part 23 of the data collection device 12 should just produce the said section data, if the measurement data which show a marker are acquired.

  The section data association unit 24 associates the section data received from the section data creation unit 23 corresponding to each measurement equipment Yj. The section data association unit 24 transmits a plurality of section data associated with each measurement equipment Yj to the data synchronization device 14 and the data display device 17.

  A specific example of the association between the section data will be described with reference to FIG. FIG. 3 shows the measurement data C1 of the operating current measured by the first measurement equipment Y1 and the measurement data C2 of the external dimensions measured by the second measurement equipment Y2 in time series order. The arrows in the figure indicate the time when the data collection device 12 detects the marker M.

  As shown in FIG. 3, a short time after the first measuring equipment Y1 detects the marker M, the second measuring equipment Y2 on the downstream side detects the marker M. The work included between the markers M is highly likely to be the same. Therefore, the section data D1 (k) between the kth marker M (k) and the (k + 1) th marker M (k + 1) in the first measuring equipment Y1 is the above marker in the second measuring equipment Y2. It can be associated with the interval data D2 (k) between M (k) and M (k + 1).

  Next, the line information storage device 13 will be described. The line information storage device 13 stores various types of information related to the production line ML. In the present embodiment, the line information storage device 13 stores the waste time and the waste number of each production facility S · Xi · Yj.

  Here, the dead time refers to the time spent on a certain manufacturing facility after a workpiece is processed in the manufacturing facility adjacent to the upstream side until it is processed in the manufacturing facility. The minimum dead time, which is the minimum value of the dead time, is a time that must be spent between manufacturing facilities regardless of how efficiently the processing is performed. That is, the workpiece is not processed at the manufacturing facility before the minimum dead time has elapsed since the processing is performed at the manufacturing facility adjacent to the upstream side.

  On the other hand, the waste number refers to the number of workpieces that have not been processed for a certain manufacturing facility. In a normal manufacturing facility, in order to prevent the workpieces before processing from being excessively accumulated and overflowing from the manufacturing line ML, when the number of waste exceeds a threshold value, an instruction to stop the adjacent manufacturing facility on the upstream side is given. Since this threshold value is the maximum value that can be taken as a waste number, it is called the maximum waste number. That is, the number of workpieces or markers existing between adjacent manufacturing facilities does not exceed the maximum number of waste.

  Therefore, the wasted time and the wasted number can be used as new conditions for improving the accuracy of association when a set of measurement data is associated between different measurement facilities Yj.

  In the present embodiment, the dead time and the number of pieces of manufacturing equipment S, Xi, and Yj stored in the line information storage device 13 are provided upstream of the dead time and the number of pieces of the own manufacturing equipment and the own manufacturing equipment. In addition, the waste time and the number of waste pieces of all the manufacturing facilities are respectively integrated. In this case, the wasted time and the wasted number between the different measuring facilities Yj can be obtained by subtracting the wasted time and the wasted number of the upstream measuring facility from the wasted time and the wasted number of the downstream measuring facility.

  As shown in FIG. 1, the line information storage device 13 theoretically stores the minimum wasted time Δt (xi) · Δt (yi) as the wasted time, and the maximum wasted number Δn ( It is desirable to store xi) · Δn (yi). However, even if these are used and the conditions for the association are loose, the mean values of the wasted time and the wasted number in the plurality of measuring facilities Yj may be used as the wasted time and the wasted number, respectively.

  Next, the data synchronizer 14 will be described with reference to FIGS. FIG. 4 shows a schematic configuration of the data synchronizer 14. As illustrated, the data synchronization device 14 includes a section data acquisition unit 31, a synchronization data creation unit (synchronization data creation unit, corresponding synchronization data creation unit, synchronization data adjustment unit) 32, and a synchronization data transmission unit 33. is there.

  The section data acquisition unit 31 acquires section data {Dj (k)} associated with each measurement equipment Yj from the data collection device 12. The section data acquisition unit 31 transmits the acquired section data {Dj (k)} to the synchronization data creation unit 32.

  The synchronization data creation unit 32 uses the segment data {Dj (k)} from the segment data acquisition unit 31 to synchronize data that is a set of measurement data Cj that is smaller than the segment data Dj, and has different measurement facilities. Synchronous data {Ej (k)} associated with Yj is created. The synchronization data transmission unit 33 transmits the created synchronization data {Ej (k)} to the synchronization data transmission unit 33.

  The reason for creating the synchronization data Ej is as follows. That is, as described above, in order to prevent a decrease in production efficiency due to the insertion of the marker M, the marker is normally inserted every several hundred workpieces. In this case, the number of measurement data Cj included in one section data Dj is several hundred. On the other hand, in this embodiment, a change in the manufacturing process is determined by calculating a statistic of a set including a plurality of measurement data Cj and examining the transition. For this reason, if the number of measurement data Cj included in the section data Dj is large, it is easy to overlook changes in the manufacturing process. Therefore, in the present embodiment, the synchronization data creation unit 32 creates the above-described synchronization data. Details of creation of the synchronization data will be described later.

  The synchronization data transmission unit 33 transmits the synchronization data {Ej (k)} from the synchronization data creation unit 32 to the data comparison device 16 and the data display device 17. In order to display the synchronization data {Ej (k)} in an easy-to-understand manner, the data synchronization device 14 uses, for example, an average value, a standard deviation, and an average ± (3 ×) from the measurement data Cj included in the synchronization data Ej (k). It is desirable to calculate a statistic such as a standard deviation and transmit it to the data display device 17.

  The synchronous data Ej (k) is created as follows. That is, the data synchronizer 14 first creates synchronous data composed of a predetermined number of measurement data in time series order with respect to a plurality of measurement data measured by the first measurement equipment Y1, and sequentially shifts the data by shifting the predetermined number. And create sync data.

  Next, the data synchronizer 14 creates synchronous data corresponding to the synchronous data created for the first measuring equipment Y1 for the second measuring equipment Y2. Then, by repeating this creation process for other measurement equipment Yj, corresponding synchronization data is created between different measurement equipment Yj.

  In this embodiment, the synchronous data is created by the following method. That is, first, with respect to certain synchronous data of the first measurement equipment Y1, the order indicating the position of the measurement data existing at a predetermined position in the entire measurement data relative to the number of all measurement data in the section data Calculate the ratio. Next, with respect to the corresponding section data in the second measuring equipment Y2, synchronization data including measurement data corresponding to the calculated number ratio at the predetermined position is created. Then, this synchronization data creation process is repeated for all the synchronization data of the first measuring equipment Y1. Note that examples of the predetermined position include the head, the middle, and the tail of the entire measurement data, and are set to the middle in the embodiment.

  FIG. 5 shows a specific example of the synchronization data creation process performed by the synchronization data creation unit 32. In the drawing, the horizontal axis indicates the marker M and the work order number nj that have reached the measuring equipment Y2 from a certain point in time (for example, at the start of manufacture). An arrow indicates a point in time when the data collection device 12 detects the marker M, and a broken line range indicates one synchronization data E. The alternate long and short dash line indicates a marker M corresponding to the first measurement facility Y1 and the second measurement facility Y2. Further, the two-point difference line shows the synchronous data E1 and E2 corresponding between the first measuring equipment Y1 and the second measuring equipment Y2.

  First, the synchronization data creation unit 32 creates, as first synchronization data E1 (1), synchronization data composed of L pieces of measurement data C1 immediately after detecting the first marker M (1) in the first measurement equipment Y1. Then, the synchronization data E1 is generated one after another while shifting the L / 2 pieces of measurement data C1. As a result, as shown in FIG. 5, a plurality of synchronization data relating to the first measuring equipment Y1... E1 (p) · E1 (p + 1) (where p is an integer of 1 or more) is created. As shown in the figure, the synchronization data E1 may partially overlap with the adjacent synchronization data E1.

Next, the synchronization data creation unit 32 calculates the leading order number n2 (p) of the pth synchronization data E2 (p) in the second measurement equipment Y2 using the following equation (1).
n _{j + 1} (p) = T _{j + 1} (k) × (n _j (k) −n _j (p)) − (1−T _{j + 1} (k)) × L / 2 + n _{j + 1} (k) (1).

Here, nj (k) is the order number of the kth marker M (k) in the jth measurement facility Yj, and nj (p) is the pth synchronization data Ej in the jth measurement facility Yj. This is the order number at the beginning of (p). T _{j + 1} (k) is (j + 1) with respect to the number of workpieces (measurement data) between the k-th and (k + 1) -th markers M (k) and M (k + 1) in the j-th measurement facility Yj. This is the ratio of the number of workpieces (measurement data) between the kth and (k + 1) th markers M (k) and M (k + 1) in the th measurement equipment Yj + 1, and is expressed by the following equation (2). The
T _{j + 1} (k) = (n _{j + 1} (k + 1) −n _{j + 1} (k)) / (n _j (k + 1) −n _j (k)) (2).

  Then, p-th synchronization data E2 (p) composed of L pieces of measurement data C2 is created from the head order number n2 (p) calculated using the above equation (1).

  By the way, in the example of FIG. 5, the work between the kth marker M (k) and the (k + 1) th marker M (k + 1) reaches the second measuring equipment Y2 from the first measuring equipment Y1. By the time, it has increased due to the addition. Even in such a case, the adjacent synchronization data E2 in the second measuring equipment Y2 has a wider interval between the leading order numbers n2 by the above equation (1).

  On the other hand, the work between the (k + 1) th marker M (k + 1) and the (k + 2) th marker M (k + 2) is from the first measuring equipment Y1 to the second measuring equipment Y2. In addition, it is reduced by sampling. Even in such a case, the adjacent synchronization data E2 in the second measuring equipment Y2 has a narrow interval between the leading order numbers n2 according to the above equation (1). Therefore, it is possible to accurately associate the synchronization data E between the different measurement facilities Yj.

  Note that in the method of creating the synchronization data Ej as shown in FIG. 5, the number of measurement data Cj included between the markers M is about 10 to 30 times the number of measurement data Cj included in the synchronization data Ej. Therefore, it is suitable for the production line ML in which extraction and addition on the way are performed relatively uniformly. In this case, since the accuracy of the association of the section data Dj is good, the accuracy of the association of the synchronization data Ej that is evenly arranged with the number of measurement data Cj included in the section data Dj is also good.

  Further, in the present embodiment, the synchronization data Ej associated with different measurement equipments Yj is adjusted using the minimum wasted time and the maximum wasted number stored in the line information storage device 13. As a result, the leading n2 (p) of the synchronization data Ej calculated using the above equation (1) can be adjusted. Therefore, it is possible to accurately associate the synchronization data E between the different measurement facilities Yj.

  FIG. 6 shows a specific example of adjusting the synchronization data Ej using the dead time and the dead number. FIG. 6 particularly shows the p-th synchronization data Ej (p) in an enlarged manner compared with FIG. In the drawing, the horizontal axis indicates the time, and the x mark indicates the measurement time when the measurement data Cj of the workpiece is measured.

  As shown in FIG. 6, the first measurement time t1 (p, 1) in the p-th synchronization data E1 (p) relating to the first measurement equipment Y1 and the p-th synchronization data E2 relating to the second measurement equipment Y2 ( The difference Δt2 (p, 1) from the leading measurement time t2 (p, 1) in p) becomes the leading dead time in the pth synchronization data E2 (p) related to the second measuring equipment Y2.

Therefore, the synchronization data creation unit 32 determines whether or not the difference Δt2 (p, 1) satisfies the following equation.
Δt (y _{j + 1} ) −Δt (y _j ) ≦ Δt _{j + 1} (p, q) (3).
Here, Δt (y _j ) is the minimum dead time in the j-th measuring equipment Yj, and Δt _j (p, q) is the q-th in the p-th synchronization data Ej (p) related to the j-th measuring equipment Yj. Is the dead time of the measurement data Cj.

  If the above equation (3) is not satisfied, the measurement data C1 measured by the first measuring equipment Y1 at time t1 (p, 1) is measured by the second measuring equipment Y2 at time t2 (p, 1). It does not correspond to the measurement data C2, but corresponds to the measurement data C2 measured after the time t2 (p, 1). Therefore, it can be understood that the p-th synchronization data E2 (p) relating to the second measuring equipment Y2 may be shifted to the right.

  As shown in FIG. 6, the number Δn2 (p, 1) of measurement data C2 included in the difference (dead time) Δt2 (p, 1) is a wasteful number. In the illustrated example, since one piece of measurement data C2 is included during Δt2 (p, 1), Δn2 (p, 1) = 1. Further, since the measurement data C2 is not included in Δt2 (p, 2), Δn2 (p, 2) = 0.

Therefore, the synchronization data creation unit 32 determines whether or not the difference Δn2 (p, 1) satisfies the following equation.
0 ≦ Δn _{j + 1} (p, q) ≦ Δn (y _{j + 1} ) −Δn (y _j ) (4).
Here, Δn (y _j ) is the maximum wasted number in the j-th measurement facility Yj, and Δn _j (p, q) is the q-th in the p-th synchronization data Ej (p) for the j-th measurement facility Yj. This is the number of wasted measurement data Cj.

  If the above equation (4) is not satisfied, the measurement data C1 measured by the first measuring equipment Y1 at time t1 (p, 1) is measured by the second measuring equipment Y2 at time t2 (p, 1). It does not correspond to the measurement data C2, but corresponds to the measurement data C2 measured before the time t2 (p, 1). Therefore, it can be understood that the p-th synchronization data E2 (p) relating to the second measurement equipment Y2 may be shifted to the left.

  It should be noted that the intermediate or last measurement data Cj in the synchronization data Ej may be executed similarly. Furthermore, all the measurement data Cj in the synchronization data Ej may be similarly executed. In this case, individual measurement data Cj in the synchronization data Ej can be associated with different measurement equipments Yj.

  Further, instead of the minimum dead time and the maximum waste number, the average dead time and the average waste number can be used. In this case, the accuracy of association is further improved.

  Further, the method using the dead time as described above has a relatively large number of buffers between the manufacturing facilities as compared with the number of measurement data Cj included in the synchronous data Ej, but the operating rate of each manufacturing facility is high. It is suitable for the production line ML in which a long stoppage hardly occurs. In this case, since the dead time between manufacturing facilities can be defined with the minimum dead time, the accuracy of association is improved.

  Further, in the method using the waste number as described above, the number of buffers between the manufacturing facilities is not so large as compared with the number of measurement data Cj included in the synchronization data Ej, but a long-time stop frequently occurs. It is suitable for such a production line ML. In this case, since the number of wasted manufacturing facilities that have been stopped for a long time is defined by the maximum number of wasted pieces, the associating accuracy is improved.

  By the way, among the measurement items of different measurement equipment Yj, the same item may exist, or there may be a correlation such as an operation current and an operation resistance. The measurement data Cj between the measurement items having such relevance often changes with relevance.

  Therefore, in this embodiment, the synchronization data creation unit 32 determines whether or not the association of the synchronization data Ej is appropriate by using measurement items having relevance in different measurement facilities Yj. If the association is inappropriate, the synchronization data Ej may be shifted in the past direction or the current direction so that the association is appropriate. Thereby, the accuracy of the association can be improved.

  The relationship between the measurement items will be specifically described with reference to FIGS. 7 and 8. FIG. 7 shows measurement data C1 and synchronization data E1 related to the first measurement equipment Y1, and measurement data C2 and synchronization data E2 related to the second measurement equipment Y2 in time series.

  In FIG. 7, the measurement data C1 (1) and C1 (2) of the spring constant and the operating current are shown as the measurement data C1 measured by the first measurement facility Y1, and the measurement data measured by the second measurement facility Y2 As C2, measurement data C2 (1) and C2 (2) of the operating resistance and the external dimensions are shown. In the case shown in the figure, assuming that a constant-voltage electronic component is manufactured, the operating current of the first measuring equipment Y1 and the operating resistance of the second measuring equipment Y2 have a negative correlation due to Ohm's law. It is expected that

  FIG. 8 is a graph showing the correlation between the operating current of the first measuring equipment Y1 and the operating resistance of the second measuring equipment Y2. In the illustrated graph, the average measured value of the synchronization data E1 (2) of the operating current and the average measured value of the synchronization data E2 (1) corresponding to the operating resistance are plotted for each set. Referring to FIG. 8, it can be understood that there is a negative correlation between the operating current and the operating resistance.

  Note that, as long as workpieces of the same quality are measured by the same measuring equipment Yj, the operating current and the operating resistance usually do not change much. Therefore, the illustrated graph shows a specific region in an enlarged manner, and an inversely proportional curve indicating the relationship between the operating current and the operating resistance is linear.

  Referring to FIG. 8, the average measured value of the synchronization data E1 (2) of the operating current and the average measured value of the synchronization data E2 (1) corresponding to the operating resistance are surrounded by a broken line in the figure. If it is out of range, it can be understood that the correspondence between the synchronization data E1 and E2 can be determined to be inappropriate. Note that whether or not the measurement items have a correlation can be determined by obtaining a correlation coefficient. Since the equation for obtaining the correlation coefficient is well known, the description thereof is omitted.

  Therefore, specifically, the synchronization data creation unit 32 stores in advance the measurement items having relevance in the different measurement equipment Yj and the range of the correlation coefficient between the measurement items, and the marker When the correlation coefficient is calculated with respect to the average measurement value of the synchronization data Ej between the measurement items included in M, and the calculated correlation coefficient is out of the above range, the correlation between the synchronization data Ej is inappropriate. It will be judged. In this case, since the appropriateness of the association is determined using the average measurement value of the synchronization data Ej, even if the workpiece is extracted and added during the process, the influence on the average measurement value is low. The influence on the determination of the appropriateness can be suppressed.

  As described above, the synchronization data creation unit 32 determines the appropriateness of the association of the synchronization data Ej using the correlation between the measurement items. In other words, if the association of the synchronization data Ej is appropriate, it is considered that the correlation between other measurement items can be obtained. In the example of FIG. 7, the correlation between the operating current and the operating resistance, which are electrical characteristics, is used, but the spring constant and the external dimensions, which are mechanical characteristics, are used by using the synchronization data Ej that is appropriately associated. Can be obtained. This newly suggests that a negative correlation exists between the spring constant and the external dimensions.

  Note that the adjustment using the correlation function as described above is suitable when the measurement value of the measurement data included between the markers M changes. Therefore, it is suitable when the number of measurement data included between the markers M is larger than the number of measurement data Cj in the synchronization data Ej (about 30 to 100 times).

  Next, the condition input device 15 will be described. The condition input device 15 selects a manufacturing facility from the field worker W and inputs a new manufacturing condition in order to change the manufacturing condition of the manufacturing facility. The condition input device 15 transmits manufacturing condition data indicating the input manufacturing conditions to the selected manufacturing facility. Thereby, the manufacturing conditions of the manufacturing equipment which received the manufacturing condition data are changed. Hereinafter, a manufacturing facility whose manufacturing conditions are changed is referred to as a “changed facility”.

  The condition input device 15 includes an input device that receives an input from the field worker W. Examples of the input device include a keyboard, a numeric keypad, a pointing device such as a mouse, and a touch panel. Further, when the manufacturing conditions are input by a barcode, a barcode reader may be used as the condition input device 15.

  In the present embodiment, the condition input device 15 acquires the time when the site worker W inputs the manufacturing condition as the change time of the manufacturing condition, and the acquired change time and the change indicating the changed equipment selected by the site worker W. The facility information is transmitted to the data comparison device 16. Note that the change facility may transmit to the data comparison device 16 the change time indicating the time when the manufacturing condition is changed and the change facility information indicating its own facility.

  Next, the data comparison device 16 will be described with reference to FIG. 9 and FIG. FIG. 9 shows a schematic configuration of the data comparison device 16. As illustrated, the data comparison device 16 includes a synchronous data acquisition unit 42, a changed facility information acquisition unit 43, a change time information acquisition unit (change time acquisition unit) 44, and a change time estimation unit (change determination unit, change time estimation unit). ) 45, and a comparison data creation unit (display control means) 46.

  The synchronization data acquisition unit 42 acquires the synchronization data Ej from the data synchronization device 14. The synchronization data acquisition unit 42 transmits the acquired synchronization data Ej to the change time estimation unit 45.

  The changed facility information acquisition unit 43 acquires changed facility information from the condition input device 15. The changed facility information acquisition unit 43 transmits the acquired changed facility information to the line information storage device 13. As a result, the line information storage device 13 reads out the average waste time and average waste number of the changed equipment, and the average waste time and average waste quantity of the measuring equipment Yj located closest to the downstream side of the change equipment, and changes them. It transmits to the time estimation unit 45.

  The change time information acquisition unit 44 acquires change time information from the condition input device 15. The change time information acquisition unit 44 transmits the acquired change time information to the change time estimation unit 45.

  The change time estimation unit 45 estimates a change time that is a time when the measurement data Cj of each measurement equipment Yj changes due to a change in the manufacturing conditions of the changed equipment. The change time estimation unit 45 sets the synchronization data before the estimated change time as the synchronization data before the change, and transmits the synchronization data after the change time to the comparison data creation unit 46 as the synchronization data after the change. This change time estimation process will be described with reference to FIG.

  FIG. 10 shows a specific example in which the change time is estimated using the dead time and the dead number. FIG. 10 is the same as FIG. 6 except for the change time estimation. In the case of FIG. 10, the first processing equipment X1 is the changed equipment. Therefore, the measuring equipment located closest to the downstream side of the changed equipment is the first measuring equipment Y1 (see FIG. 1).

  First, the change time estimation unit 45 acquires the average waste time and average waste number of the first machining equipment X1 and the average waste time and average waste quantity of the first measurement equipment Y1 from the line information storage device 13, and averages them. The difference between the dead time and the average dead number is calculated. The difference between the average waste time and the average waste number corresponds to the average waste time and the average waste number from the first processing equipment X1 to the first measurement equipment Y1.

  Next, the change time estimation unit 45 adds the calculated difference in the average dead time to the change time received from the change time information acquisition unit 44, and estimates the change time t1 (In) in the first measurement facility Y1. . Next, synchronization data (p-th synchronization data E1 (p) in the example of FIG. 10) including the estimated change time t1 (In) in the measurement period of the measurement data C1 is specified. Next, for the specified synchronization data E1 (p), the number Δn1 (p, In) of measurement data C1 included from the measurement time of the first measurement data C1 to the change time is calculated. In the illustrated example, the number Δn1 (p, In) is 3.

  Next, the change time estimation unit 45 relates to the synchronization data Ej (p) of the other measurement equipment Yj associated with the synchronization data E1 (p) of the first measurement equipment Y1, and the number Δn1 (p, It is estimated that the change time tj (In) exists between the measurement time of the measurement data Cj existing in the order of the number Δnj (p, In) equal to In) and the measurement time of the next measurement data Cj. Thereby, it can be estimated that the measurement data Cj before the change is the measurement data Cj before the change from the top to the measurement data Cj existing in the order of the number Δnj (p, In), and the measurement data Cj after the change is the measurement data Cj after the change. .

  The comparison data creation unit 46 acquires the synchronization data before the change and the synchronization data after the change from the change time estimation unit 45, and creates the comparison data Fj indicating the state before and after the change of the measurement data Cj. This comparison data may be time series data of the measurement data Cj, or statistical data of the measurement data Cj such as a histogram. The comparison data creation unit 46 transmits the created comparison data to the data display device 17.

  Note that the measurement equipment upstream of the changed equipment is often not affected by the change in manufacturing conditions, so there is no need to create comparison data. Also, the statistical amount of the synchronization data can be used as comparison data. However, in this case, it may be difficult to refer to details of data fluctuation before and after the change.

  Next, the data display device 17 will be described with reference to FIGS. 11 and 12. The data display device 17 receives the section data Dj from the data collection device 12, the synchronization data Ej from the data synchronization device 14, and the comparison data Fj from the data comparison device 16, and displays various received data in a graph. . Thereby, the field worker W can refer to various data displayed on the data display device 17.

  Although not shown in the figure, the data display device 17 includes a flat panel display such as a liquid crystal display element and a plasma display, a display device such as a CRT, and a display controller that controls the display device. In addition, the data display device 17 preferably includes switching means for switching the graph display of the section data Dj, the synchronization data Ej, and the comparison data Fj according to an instruction from the field worker W.

  A specific example in which the data display device 17 displays the comparison data Fj will be described with reference to FIGS.

  FIG. 11 shows an example of a display screen when time series data of the measurement data Cj is displayed as the comparison data Fj. In this case, as shown in the drawing, the measurement data Cj of each measurement equipment Yj is arranged in the vertical direction with the change time of each measurement equipment Yj as the center. Thereby, the field worker W can grasp | ascertain easily the correspondence of measurement data Cj of each measuring equipment Yj. Moreover, since the change time of each measuring equipment Yj is the center, even if a long time has passed after the change, the field worker W can compare the measurement data Cj before and after the change.

  By the way, as the time elapses from the change time, the influence on the measurement data Cj due to factors other than the change in the manufacturing conditions increases. Therefore, by comparing the measurement data Cj before and after the change and the measurement data Cj close to the center, it is possible to compare the measurement data Cj that is less influenced by factors other than the change in the manufacturing conditions.

  By the way, when comparing time-series data in real time, there are a lot of data before the change that is past information, but there is usually only a small number of data after the change that is the future information immediately after the change. is there.

  On the other hand, the field worker W wants to know the result of the change of the manufacturing conditions as soon as possible. Therefore, the conventional data display device displays a sufficient amount of measurement data Cj before the change and an insufficient amount of measurement data Cj after the change. However, in such a display, the field worker W is affected by the measurement data Cj before the change with a large amount, and the state after the change may be erroneously grasped.

  On the other hand, as shown in FIG. 11, the data display device 17 of the present embodiment sets the number of measurement data Cj before the change and the number of measurement data Cj after the change to the same level. The series data is displayed. Thereby, the field worker W can appropriately compare the measurement data Cj before and after the change.

  In the case of FIG. 11, the display width increases from the center as the measurement data Cj after the change increases. Thereby, the field worker W can immediately determine whether the measurement data Cj after the change is large or small, and the reliability of the measurement data Cj after the change can be intuitively determined. Therefore, the field worker W can make a reasonable judgment regarding the change of the manufacturing conditions.

  By the way, as described above, the data comparison device 16 is based on the change time of the reference measurement equipment Yj (the first measurement equipment Y1 in FIG. 10) and the correspondence between the synchronization data Ej of each measurement equipment Yj. The change time of other measuring equipment Yj is estimated. For this reason, when the precision of the said matching is not so high, possibility that the change time of said other measuring equipment Yj will have shifted | deviated from the actual becomes high. At this time, the measurement data Cj before the change is actually displayed as the measurement data Cj after the change, or vice versa, and erroneous information can be provided to the field worker W. There is sex.

  Therefore, as shown in FIG. 11, the data display device 17 of the present embodiment provides a predetermined margin area near the change time nj (In), and the measurement data Cj is not displayed in this margin area. Thereby, it can prevent providing incorrect information to the field worker W.

  FIG. 12 shows an example of a display screen when a histogram of the measurement data Cj is displayed as the comparison data Fj. In this case, since it is necessary to simultaneously compare the histograms before and after the change and the histograms of the other measuring equipment Yj, the histograms are arranged two-dimensionally as shown in the figure.

  Even when the histogram is displayed, it is desirable that the total frequency of the histogram be the same before and after the change, as in the case of displaying the time series data described above, and the measurement data Cj near the change time nj (In). Is preferably excluded from the target of the histogram.

  Next, the processing operation in the data display system 10 having the above configuration will be described with reference to FIG. FIG. 13 shows an overview of processing operations in the data display system 10. As shown in the figure, first, when a predetermined number of input products (workpieces) input by the input equipment S reaches a predetermined number (step S11. Hereinafter, it may be simply referred to as “S11”. The same applies to other steps. ), The marker control device 11 causes the insertion facility S to input a marker (S12).

  Next, when a marker reaches a certain measurement facility Yj (S13), the data collection device 12 divides the time series of measurement data Cj measured by each measurement facility Yj for each marker to create section data Dj ( S14). Next, when the data collection device 12 determines that there is section data Dj to be synchronized (to be associated) between different measurement equipments Yj (S15), the data synchronization device 14 reads the line information (minimum waste) from the line information storage device 13. (Time and maximum wasted number) are acquired, and synchronization data Ej is created from section data Dj using the acquired line information (S16).

  Next, when the site worker W tries to change the manufacturing conditions (S17), and the change time and the changed equipment are input by the condition input device 15 (S18), the data comparison device 16 displays the line information storage device 13. The line information is acquired from the data, the change time in each measuring equipment Yj is estimated using the acquired line information and the synchronization data Ej, and comparison data for comparing the synchronization data Ej before and after the estimated change time is obtained. Create (S19).

  Then, the data display device 17 selects and displays at least one of the section data Dj from the data collection device 12, the synchronization data Ej from the data synchronization device 14, and the comparison data Fj from the data comparison device 16 (S20). ). Thereafter, the processing operation in the data display system 10 is terminated.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  For example, in the above embodiment, the marker M is input from the upstream end of the production line ML, but may be input from the middle of the production line ML. For example, a marker can be inserted from an arbitrary location as long as it is upstream of the measurement facility Yj to be associated.

  Moreover, in the said embodiment, the synchronous data Ej equally arrange | positioned to the area data Dj is produced, the synchronous data Ej between each measurement equipment Yj is matched, and a waste time, a waste number, and a correlation coefficient are utilized. The above association is adjusted.

  However, the association adjustment can be performed using at least one of the dead time, the dead number, and the correlation coefficient.

  Further, without using the marker M, it is possible to create the synchronization data Ej by using at least one of the dead time, the dead number, and the correlation coefficient, and associate the different measurement equipments Yj.

  For example, it is possible to create the synchronization data Ej associated with each measuring equipment Yj using the average dead time and the average waste number, and adjust the created synchronization data Ej using the correlation coefficient. . Also, using the minimum dead time and the largest dead number, the range that can be taken by the synchronization data Ej associated with each measuring equipment Yj is determined, and the correlation coefficient is determined while shifting the head of the synchronization data Ej within the determined range. It is also possible to use and adjust.

  Furthermore, without using the marker M, individual measurement data Cj of different measurement equipment Yj can be associated with each other by using at least one of the average dead time, the average waste number, and the correlation coefficient.

  Finally, each device of the data display system 10, in particular, the data collection device 12, the data synchronization device 14, the data comparison device 16, and the data display device 17 may be configured by hardware logic, or as described below. It may be realized by software using

  That is, the data display system 10 includes a central processing unit (CPU) that executes instructions of a control program that realizes each function, a read only memory (ROM) that stores the program, and a random access memory (RAM) that expands the program. And a storage device (recording medium) such as a memory for storing the program and various data. An object of the present invention is a recording medium on which a program code (execution format program, intermediate code program, source program) of a control program of the data display system 10 which is software for realizing the functions described above is recorded so as to be readable by a computer. This can also be achieved by supplying the data display system 10 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

  Examples of the recording medium include tapes such as magnetic tapes and cassette tapes, magnetic disks such as floppy (registered trademark) disks / hard disks, and disks including optical disks such as CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

  Further, the data display system 10 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Also, the transmission medium constituting the communication network is not particularly limited. For example, in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, and ADSL line, infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  The present invention may be configured as follows.

  That is, the data display device according to the present invention displays the above-mentioned display so as to perform display related to a display unit that displays information, a series of previous data before a certain time, and a series of subsequent data after that time. In order to solve the above-described problem, the display control unit includes a display control unit configured to control the number of pieces of the previous data to be displayed. The display unit is controlled so as to be approximately the same as the number of data.

  In the data display device control method according to the present invention, the display unit that displays information displays a series of previous data before a certain time and a series of subsequent data after that time. In order to solve the above problem, the number of data of the previous data to be displayed is about the same as the number of data of the subsequent data to be displayed. The display unit is controlled.

  Here, examples of display related to a series of pre-data and post-data are created by displaying a series of pre-data and post-data as they are, or by performing statistical processing on a series of pre-data and post-data, respectively. Display statistical data.

  According to the above configuration and method, a series of previous data before a certain time and a series of subsequent data after that time are displayed on the display unit with the same number of data. Thereby, the user can appropriately compare the pre-data and the post-data displayed on the display unit. Specifically, since the field worker can appropriately perform the comparison before and after the change of the manufacturing conditions, it can be prevented that the state grasp after the change is misidentified.

  By the way, there is a case where the time for separating the previous data and the subsequent data cannot be specified accurately. In this case, although it is actually the previous data, it is determined as the subsequent data, or vice versa.

  For example, there is a time lag between the change time at which the manufacturing condition of a certain manufacturing facility is changed and the change time at which measurement data measured by each measuring facility located downstream of the manufacturing facility changes. Therefore, if the change time and the time lag can be accurately specified, the change time can be accurately estimated. However, it may be difficult to specify the time lag accurately due to defective products being removed, reworked, and re-introduced on the production line. In this case, it is difficult to accurately estimate the change time.

  If the change time estimated from the change time and the time lag is different from the actual change time, it is actually judged that the measurement data before the change is the measurement data after the change, or vice versa. Will occur. As a result, there is a risk of providing incorrect information to users such as field workers.

  Therefore, in the data display device according to the present invention, the display control means excludes, from the display target, data from the certain time to a predetermined number or a predetermined period before the series of previous data. It is preferable to control the display unit so as to exclude data from a certain time until a predetermined number or a predetermined period of time from among the display data. In this case, since data that is close to a certain time and is not clear whether it is the previous data or the subsequent data is not displayed, it is possible to prevent providing unclear information to the user and use the data. The person can compare the previous data and the subsequent data more appropriately.

  When the present invention is applied to a data display device that displays data based on measurement data measured by each measurement facility in a production line provided with a plurality of measurement facilities, the data display device is provided in the production line. When a manufacturing condition of a certain manufacturing facility is changed, a change time acquisition unit that acquires a change time that is a time when the change is performed, and a certain measurement facility by the change based on the acquired change time. Change determining means for discriminating between the measurement data before the change of the measurement data and the measurement data after the change, and the display control means outputs the series of measurement data before the change to the series of previous measurement data. The display unit may be controlled so as to display a series of measurement data after the change as the series of subsequent data. In this case, a user such as an on-site worker can appropriately grasp a change in measurement data due to a change in manufacturing conditions.

  In the data display device according to the present invention, the change determination means determines the measurement data before the change and the measurement data after the change for each of the plurality of measurement facilities, and the display control means It is preferable to control the display unit so that a series of measurement data before the change and a series of measurement data after the change are displayed for each measurement facility. In this case, since the series of measurement data before the change and the series of measurement data after the change are displayed for each measurement facility, a user such as a field worker can change the manufacturing condition of a certain manufacturing facility. It is possible to appropriately grasp the influence on the production line.

  In the data display device according to the present invention, using at least one of the dead time and the number of waste generated from the production equipment having the production conditions changed to the measurement equipment, and the change time acquired by the change time acquisition means, The apparatus further comprises a change time estimating means for estimating a change time that is a time at which the measurement data of the measuring equipment changes due to the change of the manufacturing condition, and the change determining means is based on the change time estimated by the change time estimating means. Preferably, the previous measurement data is determined as the measurement data before the change, and the measurement data after the change time is determined as the measurement data after the change.

  In this case, the change time can be estimated well by using at least one of the dead time and the waste number generated from the production equipment whose production conditions are changed to the measurement equipment. Therefore, it is possible to satisfactorily separate the measurement data before the change and the measurement data after the change related to the measurement facility.

  The data display device according to the present invention further comprises data association means for associating synchronous data, which is a set of measurement data obtained by measuring a plurality of manufacturing objects by a certain measurement facility, between the plurality of measurement facilities. The change determination means is included in the synchronization data associated with the synchronization data including the measurement data before the change in the reference measurement facility, with respect to the measurement facilities other than the reference measurement facility that is the measurement facility that estimated the change time. The measurement data is determined as the measurement data before the change, and the measurement data included in the synchronization data associated with the synchronization data including the measurement data after the change in the reference measurement facility is determined as the measurement data after the change. It is preferable.

  In this case, the measurement equipment other than the reference measurement equipment whose change time is estimated is also a set of measurement data before and after the change that is well separated with respect to the reference measurement equipment, and a set of measurement data that is associated with each measurement equipment. By using the synchronized data, the measurement data before the change and the measurement data after the change can be satisfactorily separated.

  Note that the greater the distance in the production line between the production equipment whose production conditions have been changed and the reference measurement equipment that estimates the change time, the greater the uncertainties and the greater the error in the estimated change time. Conceivable. Therefore, it is preferable that the reference measurement equipment is the nearest measurement equipment located closest to the downstream side from the production equipment whose production conditions are changed. In this case, an error in the estimated change time can be suppressed.

  In the data display device according to the present invention, the data association means is created by the synchronous data creation means for creating the synchronization data with respect to a certain measurement facility and the synchronization data creation means for another measurement facility. Corresponding synchronization data creating means for creating synchronization data corresponding to the synchronization data may be provided.

  Note that various methods can be considered as a method in which the corresponding synchronization data creation means creates the synchronization data.

  For example, the corresponding synchronization data creation means creates a plurality of synchronization data candidates related to the other measurement equipment having the same number of elements as the synchronization data related to the certain measurement equipment, , By calculating the correlation coefficient with the synchronization data candidate for the other measuring equipment, and repeating this for each synchronization data candidate, the synchronization data candidate having the maximum absolute value of the correlation coefficient is identified, It is mentioned that it is set as the synchronous data regarding another measuring equipment.

  Further, the corresponding synchronization data creating means uses at least one of a dead time and a waste number generated between the certain measurement facility and the other measurement facility, and includes the synchronization data in the synchronization data regarding the certain measurement facility. For example, a plurality of pieces of measurement data related to the other measurement equipment corresponding to the plurality of pieces of measurement data are specified, and synchronization data including the plurality of pieces of specified measurement data is created.

  In the data display device according to the present invention, the data acquisition means for acquiring the measurement data measured by the measurement equipment, the marker detection means for detecting the marker put in the production line, and the marker detected by the marker detection means The measurement data of a plurality of manufacturing objects included in the data acquisition means is obtained from the data acquisition means, and section data creation means for creating section data that is a set of the obtained plurality of measurement data is provided for each measurement facility, Section data associating means for associating the section data created by the section data creating means between the plurality of measuring facilities is provided, and the synchronous data creating means is less in number with respect to the certain measuring equipment than the section data. Synchronization data which is a set of measurement data of the above-mentioned, and the corresponding synchronization data creation means Response with means utilizing the section data with each other which associates among the plurality of measuring equipments may be generating synchronous data corresponding to the synchronous data in which the synchronous data producing means.

  In this case, measurement data of a plurality of manufacturing objects included between the markers is acquired, section data that is a set of the plurality of acquired measurement data is created, and the created section data is associated between different measurement facilities. Yes. The plurality of manufacturing objects included between the markers may be slightly extracted or added, but it is highly possible that they are the same as a whole. Therefore, the section data correlated between different measuring equipments is a good correlation. Thereby, the favorable correlation can be maintained between the synchronous data matched between different measuring equipment. Moreover, when creating a plurality of synchronous data in the section data, it becomes easy to grasp the time transition of the measurement data.

  In the data display device according to the present invention, the corresponding synchronization data creation means is configured such that the elements located in a predetermined order in the synchronization data created by the synchronization data creation means with respect to the certain measurement equipment are located in the section data. Calculating the order ratio, which is the ratio of the order to the number of elements in the section data, multiplying the number of elements in the section data of the other measuring equipment associated with the section data by the order ratio, The order in the section data of the other measuring equipment may be calculated, and synchronous data may be created so that the elements of the calculated order are positioned in the predetermined order.

  In the data display device according to the present invention, the production line is provided with a loading facility for loading the marker, and the marker is loaded each time a predetermined number of the production objects are loaded into the production line. It is preferable to further comprise marker insertion control means for controlling the above-mentioned insertion equipment. In this case, since the number of manufacturing objects between the markers can be made substantially equal, it becomes easy to compare the section data of the same measuring equipment.

  Each means in the data display device can be made to function on a computer by a data display device control program. Further, by storing the data display device control program and / or the data association device control program in a computer-readable recording medium, the data display device control program and / or the data association device on any computer A control program can be executed.

  As described above, the data display device according to the present invention displays a series of previous data before a certain time and a series of subsequent data after that time on the display unit with the same number of data. Therefore, there is an effect that the user can appropriately compare the pre-data and the post-data displayed on the display unit.

  The data association apparatus and the data display apparatus according to the present invention can be applied to apparatuses that monitor and control various processes such as control of home appliances in addition to the production line.

It is a block diagram which shows the principal part structure of the data display system which is one Embodiment of this invention. It is a block diagram which shows schematic structure of the data collection device in the said data display system. It is a graph which shows the measurement data which the 1st measurement installation of the said data display system measures, and the measurement data which a 2nd measurement installation measures in time series order. It is a block diagram which shows schematic structure of the data synchronizer in the said data display system. It is a graph which shows the specific example of the production | generation process of the synchronous data in the said data synchronizer. It is a graph which shows the specific example which adjusts synchronous data using a dead time and a waste number in the said data synchronizer. In the said data synchronizer, it is a graph which shows the measurement data and synchronous data regarding the 1st measurement equipment, and the measurement data and synchronization data regarding the 2nd measurement equipment in order of time series. It is a graph which shows correlation with the operating current of the 1st measuring equipment, and the operating resistance of the 2nd measuring equipment. It is a block diagram which shows schematic structure of the data comparison apparatus in the said data display system. It is a graph which shows the specific example which estimates a change time using a dead time and a waste number in the said data comparison apparatus. It is a figure which shows an example of the display screen which the data display apparatus in the said data display system displayed the time series data of measurement data as comparison data. It is a figure which shows an example of the display screen which the said data display apparatus displayed as a comparison data the histogram of measurement data. It is a flowchart which shows the outline | summary of the processing operation in the said data display system.

Explanation of symbols

10 Data display system (data display device, data association device)
11 Marker control device (marker insertion control means)
12 Data collection device (data association device)
13 Line information storage device (storage unit)
14 Data synchronization device (data association means, data association device)
16 Data comparison device 17 Data display device (display unit, display control means)
21 Measurement data acquisition unit (data acquisition means)
22 Marker detection unit (marker detection means)
23 Section data creation unit (section data creation means)
24 Section data association unit (section data association means)
32 synchronization data creation unit (synchronization data creation means, corresponding synchronization data creation means, synchronization data adjustment means)
44 Change time information acquisition unit (change time acquisition means)
45 Change time estimation unit (change determination means, change time estimation means)
46 Comparison data creation unit (display control means)
ML production line S input equipment Yj measurement equipment Cj measurement data Dj section data Ej synchronization data Fj comparison data M marker

Claims (10)

  In a production line provided with a plurality of measuring equipment, a data association apparatus that associates a set of measurement data obtained by measuring the plurality of manufacturing objects by the measuring equipment between the plurality of measuring equipment,
  With respect to one of the different measurement facilities, synchronous data creating means for creating synchronous data that is a set of the measurement data,
  With respect to the other of the different measuring equipment, it comprises a corresponding synchronization data creation means for creating synchronization data corresponding to the synchronization data created by the synchronization data creation means,
  The corresponding synchronization data creating means is
  For the other measuring equipment, create a plurality of synchronization data candidates having the same number of elements as the synchronization data created by the synchronization data creation means,
  The correlation coefficient between the synchronous data related to the one measuring equipment and the synchronous data candidate related to the other measuring equipment is calculated, and this is repeated for each synchronous data candidate so that the absolute value of the correlation coefficient is maximized. A data associating device characterized in that a data candidate is specified and used as synchronous data relating to the other measuring equipment.   Data associating means for associating measurement data measured by the different measurement facilities;
  A storage unit for storing information on the number of waste generated between the different measurement facilities,
  The data association means identifies the measurement data measured by the other of the different measurement facilities, corresponding to the measurement data measured by one of the different measurement facilities, using the waste number. Item 4. The data association device according to Item 1. For each measuring equipment
Data acquisition means for acquiring measurement data measured by the measurement facility;
Marker detection means for detecting a marker put into the production line;
Section data creation means for obtaining measurement data of a plurality of manufacturing objects included between the markers detected by the marker detection means from the data acquisition means, and creating section data which is a set of the obtained plurality of measurement data; Has
The data association apparatus according to claim 1 or 2, further comprising: interval data association means for associating the interval data created by the interval data creation means between different measurement facilities. Synchronous data creation means for creating synchronous data that is a collection of a small number of measurement data compared to the section data, with respect to a certain measurement facility
With respect to another measurement facility, the section data association unit creates synchronization data corresponding to the synchronization data created by the synchronization data creation unit by using the section data associated between the plurality of measurement facilities. 4. The data association apparatus according to claim 3, further comprising correspondence synchronization data creation means. The corresponding synchronization data creating means is
With respect to the certain measurement equipment, the order ratio in which the elements located in a predetermined order in the synchronization data created by the synchronization data creation means is the ratio of the order of positions in the section data to the number of elements in the section data. To calculate
Multiply the number of elements in the section data of the other measuring equipment associated with the section data by the order ratio to calculate the order in the section data of the other measuring equipment, and the elements of the calculated order are the above 5. The data association apparatus according to claim 4, wherein the synchronization data is created so as to be positioned in a predetermined order.   A data association apparatus control program for operating the data association apparatus according to any one of claims 1 to 5, wherein the data association apparatus control program causes a computer to function as each of the means.   A computer-readable recording medium on which the data association device control program according to claim 6 is recorded.   In a production line provided with a plurality of measuring equipment, a method for controlling a data association apparatus that associates a set of measurement data obtained by measuring the plurality of manufacturing objects by the measuring equipment between the plurality of measuring equipment,
  For one of the different measurement facilities, a synchronization data creation step for creating synchronization data that is a set of the measurement data,
  A corresponding synchronization data creating step for creating synchronization data corresponding to the synchronization data created in the synchronization data creation step with respect to the other of the different measuring equipment,
  The corresponding synchronization data creation step
  Regarding the other measuring equipment, create a plurality of synchronization data candidates having the same number of elements as the synchronization data created in the synchronization data creation step,
  The correlation coefficient between the synchronous data related to the one measuring equipment and the synchronous data candidate related to the other measuring equipment is calculated, and this is repeated for each synchronous data candidate so that the absolute value of the correlation coefficient is maximized. A method for controlling a data association apparatus, characterized in that a data candidate is identified and used as synchronous data relating to the other measuring equipment.   The data association apparatus is a data association apparatus that associates measurement data measured by different measurement facilities, and includes a storage unit that stores information on the number of wastes generated between the different measurement facilities.
  The measurement data measured by the different measurement equipment is identified by specifying the measurement data measured by the other of the different measurement equipment, corresponding to the measurement data measured by one of the different measurement equipment, using the waste number. The method of controlling a data association apparatus according to claim 8, wherein the association is performed. For each measuring equipment
A data acquisition step of acquiring measurement data measured by the measurement facility;
A marker detection step for detecting a marker put into the production line;
Including a section data creation step of obtaining measurement data of a plurality of manufacturing objects included between the detected markers and creating section data which is a set of the plurality of obtained measurement data,
The method for controlling a data association apparatus according to claim 8 or 9, further comprising a section data association step for associating the created section data between different measurement facilities.

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