JP4659474B2 - Occupancy rate calculation device - Google Patents

Description

  The present invention relates to an operating rate calculation device that calculates an operating rate of an entire mounting line in a mounting line configured by connecting a plurality of production apparatuses.

  Conventionally, the operation rate of the entire mounting line composed of a plurality of production apparatuses has been calculated. By calculating the operating rate of this mounting line, it is possible to monitor the production status of the mounting line, analyze and remove the factors that reduce the operating rate, grasp the production efficiency of the entire line, and improve the production facilities. It becomes possible.

  In addition, if a decrease in the operation rate is detected, it is possible to detect the occurrence of a trouble in the mounting line. For example, since it is possible to detect troubles such as the occurrence of an operation error in the production apparatus and the temporary suspension of the mounting line when the parts are out, the detection of the operation rate is one of the important elements in the management of the mounting line.

  In general, when calculating the operating rate, for example, operating signals (for example, during operation or trouble) output from the production devices constituting the mounting line are collected to obtain the net operating time and trouble time, and the operating rate is calculated. Is calculated.

  FIG. 12 is an explanatory diagram for explaining the operation rate. As shown in this figure, the operation time of the mounting line, which is the period from the start of production of the board to the end of production, and the mounting line are actually operated. Using the net operating time that is the period, the trouble time that is the period when the trouble is occurring in the mounting line, and the operation time of the entire factory, the time operating rate and figure based on the following (Equation 3) to (Equation 5) The equipment performance availability shown in 12 (b) is calculated.

Operating time = final board production end time-first board production start time (Equation 3)
Time utilization rate = (net operation time + trouble time) / operation time (Equation 4)
Equipment performance utilization rate = net operation time / (net operation time + trouble time) (Equation 5)
Then, as a conventional operation rate calculation device, operation information is collected from each mounting machine that constitutes the mounting line via an operation signal, and it is determined which mounting machine is the bottleneck, and then the operating rate of the entire line An operation rate calculation device for obtaining the above is disclosed (for example, see Patent Document 1).
JP 2002-111298 A

  However, in the conventional operation rate calculation, it is necessary to collect the operation signals of the bottleneck production apparatus, which is the production apparatus for the most time-consuming process, from a plurality of production apparatuses constituting the mounting line. Here, the bottleneck production device means a production device having the longest tact required for production in a production device included in one mounting line, and the tact of the bottleneck production device is an operation rate of the entire mounting line. It is a factor that decides.

  In this case, for example, the production device that becomes the bottleneck may change due to a change in the production item of the mounting line, and it is impossible to obtain the operation rate of the line simply by collecting the operation signal of the specific production device. There's a problem.

  In addition, when specifying a production device that becomes a bottleneck, it is necessary to collect operation signals of all the production devices that constitute the mounting line and specify a production device that becomes a bottleneck for each production item. Because the method of collecting operation signals differs for each device and each manufacturer of the production device, it is not easy to detect the operation signal from a plurality of such different production devices at a time and identify the production device that becomes the bottleneck. Absent.

  Therefore, the present invention has been made in view of such a problem, and the operation rate of a mounting line configured by connecting a plurality of production apparatuses can be determined without specifying a production apparatus that becomes a bottleneck. An object of the present invention is to provide an operating rate calculation device that can be calculated more easily with a simple configuration.

In order to solve the above problems, an operation rate calculation device according to the present invention is an operation rate calculation device that calculates an operation rate of a mounting line composed of a plurality of production devices, and is the most downstream position of the mounting line. A substrate detection sensor for detecting the passage of the substrate, and a start / end designation means for designating start and end of substrate detection by the substrate detection sensor by manual input or automatic input while being connected to the substrate detection sensor If, based on the detection signal from the substrate detecting sensor, the passing interval detection means for detecting a sample data feed intervals of the substrate to be transported to the mounting line, predetermined split based on sample data of the feed intervals a mode value detecting means for detecting the mode of the feed intervals by performing the processing, the detection speed of the substrate to be detected in the substrate detection sensor, the outermost The mode value detected in the value detecting means, and, based on the detected operating time at the start / end designating means, and a utilization rate calculating means for calculating the operating ratio, the predetermined splitting process The mode value detecting means detects the maximum value and the minimum value from the sample data of the passage interval, and calculates the interval width by dividing the difference between the maximum value and the minimum value by a predetermined number of divisions. The mode value detecting means excludes sample data of a predetermined section from sample data of the passage interval when the section width is equal to or larger than the target division width, and the section width is preset. until below the target division width detecting the mode value by performing the predetermined splitting process, the operating rate calculating means, the calculating means calculates the operating rate using equation 1 below That.
Operation rate = mode value x number of detections / operation time (Equation 1)

  With this configuration, it is possible to calculate the operating rate of the mounting line by the operating rate calculation means with a simple configuration of providing a substrate detection sensor at the most downstream position of the mounting line, and it is also a bottleneck in calculating the operating rate. There is no need to specify a production device.

In addition, with this configuration, since the mode value detection means can detect the mode value of the passage interval, the operation rate calculation means calculates the operation rate of the mounting line by an arithmetic expression based on this mode value. it can.

Furthermore, with this configuration, it is possible to specify the start and end of the mounting line in the start / end specifying means, and it is possible to appropriately specify the operating time of the operating rate calculation device, and thus more accurately the operating rate. Calculation can be performed.

  In order to achieve the above object, the present invention can be implemented as an operation rate calculation method using characteristic constituent means of the operation rate calculation device as steps, or as a program including all these steps. The program is not only stored in a ROM or the like included in the operating rate calculation device, but can also be distributed via a recording medium such as a CD-ROM or a communication network.

  The operation rate calculation device according to the present invention has an effect of facilitating the calculation of the operation rate of the entire mounting line and improving the production efficiency of the entire mounting line.

Hereinafter, an operation rate calculation apparatus according to an embodiment of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is an external view showing an example of a mounting line that includes an operation rate calculation apparatus 100 according to the present invention and is configured by connecting a plurality of production apparatuses. FIG. 1A shows a case where the start / end signal of the substrate detection sensor 202 is manually detected, and FIG. 1B shows the start / end detection in which the start / end signal of the substrate detection sensor 202 is provided in the reflow. It is an external view when automatically detected by the unit 101.

  The operation rate calculation device 100 is a device for calculating the operation rate of the mounting line based on the substrate detection signal from the substrate detection sensor 202. For example, dedicated software is installed in a general-purpose computer such as a personal computer. It is constituted by being done. That is, the operation rate calculation apparatus 100 evaluates the operation rate for each mounting line composed of a group of machines that perform a series of operations.

  The production line shown in FIG. 1 is connected to a production device that performs, for example, electronic substrate printing, coating, mounting, and reflow processes as the production device, and the operation rate calculation device 100 is arranged at the most downstream position of the packaging line. Has been.

  Further, the operation rate calculation apparatus 100 is provided in the reflow apparatus located at the final position of the mounting line in FIG. 1B and the external start / end switch 201 in FIG. 1A. By detecting a detection signal from the / end detection unit 101, the start and end of production on the mounting line are detected manually or automatically.

  As described above, the operating rate calculation apparatus 100 according to the present invention includes the board detection sensor 202 that detects the passage of the board at the final position of the mounting line, and the board passage signal and the board passage interval from the board detection sensor 202. The operation rate of the entire mounting line is calculated by detecting the above. Note that this passage interval is a production tact of a production apparatus that becomes a bottleneck when trouble does not occur in the mounting line.

FIG. 2 is a functional block diagram showing the overall configuration of the operation rate calculation apparatus 100 according to the present invention.
The operation rate calculation device 100 is a device that calculates the operation rate of the entire mounting line, and includes a data storage unit 203, a calculation unit 204, an operation rate storage unit 205, and a screen control unit 206 inside. A start / end switch 201, a substrate detection sensor 202, and a display unit 207 are provided as attachment devices.

  As shown in FIG. 1, the start / end switch 201 is a processing unit that is externally or internally disposed and designates start and end of substrate detection by the substrate detection sensor. It transmits to the detection sensor 202. For example, when the substrate first passes the sensor, the operator operates the start / end switch 201 to designate the production start, and the substrate detected immediately before the start switch is pressed is set as the production start substrate. When the last substrate passes the sensor, the operator operates the start / end switch 201 to designate the production start, and the substrate detected immediately before the end switch is pressed is set as the production end substrate. As means for designating the production start and production end boards, in addition to the start / end switch 201, the start and end timings may be designated by a handy terminal, a touch panel, or the like.

  The substrate detection sensor 202 is installed at the most downstream position of the mounting line, detects the passage of the substrate, and transmits the substrate detection time to the data storage unit 203 side. The substrate detection sensor 202 transmits the production start time to the data storage unit 203 when receiving the start signal from the start / end switch 201, and transmits the production end time to the data storage unit 203 when receiving the end signal. FIG. 3A, which will be described later, shows an example of detection data detected by the substrate detection sensor 202.

  The data storage unit 203 is a storage unit such as a hard disk for temporarily storing the substrate detection time, the production start time, and the production end time detected by the substrate detection sensor 202.

  The calculation unit 204 obtains the mode value of the board passage interval based on the data stored in the data storage unit 203, and calculates the operation rate using an arithmetic expression based on the mode interval. It is a processing part for doing. Specifically, the calculation unit 204 calculates the operating rate based on the mode value detected by the mode value detection unit 204a and the mode value detection unit 204a that detects the mode value of the passage interval. And an operating rate calculation unit 204b.

  The operation rate accumulation unit 205 is a storage unit such as a hard disk for sequentially recording the operation rate calculated by the calculation unit 204.

  The screen control unit 206 is a processing unit for controlling screen display related to the operation rate displayed on the display unit 207 in accordance with an operator instruction from an input unit including a keyboard and a mouse.

  The display unit 207 is a screen for displaying an image related to the operation rate according to the control from the screen display unit 206. In the present invention, a main menu, a production result input screen, an operation rate totaling screen, and an operation described later are used. The rate history display screen is displayed.

  FIG. 3 is a reference diagram illustrating an example of sampling of detection signals detected by the substrate detection sensor 202 of the operating rate calculation apparatus 100 according to the first embodiment.

  FIG. 3A shows a board detection signal from the board detection sensor 202 provided at the most downstream portion of the mounting line. As shown in the figure, the interval between the detection signal and the next detection signal is the substrate passage interval. This passing interval becomes different with the occurrence of trouble such as a failure of the production apparatus. Further, based on a signal from the start / end switch 201, production start and production end are designated.

  FIG. 3B is a graph showing the relationship between the interval time (minutes) and the frequency (number) detected by the substrate detection sensor 202 of the operating rate calculation apparatus 100 according to the present invention. In FIG. 3B, it can be seen that, for example, the frequency of the passage interval of the substrate is from t minutes to (t + h).

  FIG. 4 is a flowchart showing an overall operation procedure of the operation rate calculation apparatus 100 according to the present invention.

  The substrate detection sensor 202 detects a start signal, an end signal, or a substrate detection signal from the start / end switch 201 (S401). If any signal is detected, the detection time (production start time, production end time, substrate detection time) is recorded in the data recording unit 203 (S402). In addition, it is determined whether or not an end signal is detected (S403). When an end signal is detected (Yes in S403), the operation rate is calculated in the calculation unit 204 (S404). . If the end signal is not detected (No in S403), the substrate detection sensor 202 continues to detect the start signal, the end signal, or the substrate detection signal.

  FIG. 5 is a flowchart showing an operation procedure in a specific calculation process in the calculation unit 204 of the operating rate calculation apparatus 100 according to the present invention. In the description in the figure, the total number of sample data of the passage interval detected by the substrate detection sensor 202 is N, the passage interval value of the substrate detected by the substrate detection sensor 202 is Ti (i = 1 to N), In the following description, the minimum value of the passage interval is Tmin and the maximum value of the substrate passage interval is Tmax.

  Further, the operating rate calculation apparatus 100 according to the present embodiment reduces the division width of the sampling of the substrate passage interval value, which is the horizontal axis of FIG. 3B, in order to ensure the accuracy of the mode value of the passage interval. However, it is necessary to take a large number of data samples. However, in the actual production process, the number of productions per model may be around 10. If the division width is reduced, the number of data samples belonging to each division width is reduced, and the mode value can be calculated accurately. Can not. Therefore, in this method, the mode value is calculated by setting threshold values for the division width and the number of samples, and the accuracy of the mode value is ensured.

  For this reason, in the calculation unit 204 of the operation rate calculation apparatus 100, the number of data divisions: K = 10 (for example, Tmin to Tmax are divided into 10), the target division width: W = 0.1 minutes (for example, the division width is The sample is divided until 0.1 min or less), and the minimum number of samples: Nmin = 4 (for example, the mode value is detected when the number of samples is 4 or more) is set in advance.

  First, the mode detection unit 204a of the operation rate calculation apparatus 100 acquires sample data of the board passage interval from the board detection time, the production start time, and the production end time recorded in the data recording unit 203. (S501).

  Next, the mode value detection unit 204a compares the sample data number N with a predetermined minimum sample number Nmin to determine whether N <Nmin is satisfied (S502). Here, when the number N of samples is smaller than the sample minimum number Nmin (Yes in S502), the average value of the sample data is set as the mode value (S508).

  When the number of samples does not satisfy N <Nmin, that is, when the number of sample data N is equal to or greater than the sample minimum number Nmin, the mode value detection unit 204a acquires the minimum value Tmin and the maximum value Tmax of the sample data. (S503).

  Next, the mode value detection unit 204a performs data division processing. Here, the mode value detection unit 204a calculates a difference between the maximum value Tmax and the minimum value Tmin, and divides the difference according to a predetermined data division number K. That is, the divided section width h is h = (Tmax−Tmin) / K. Further, the frequency of the data belonging to each divided section is detected (that is, the frequency of each of Tmin to Tmin + h, Tmin + h to Tmin + 2h,... Tmin + (K−1) × h to Tmax is obtained (S504).

  Then, the mode value detection unit 204a determines whether or not the section width h divided by the data division is equal to or smaller than a predetermined target division width W (S505). Here, when the section width h is equal to or smaller than the predetermined target division width W (Yes in S505), the average value of the data of the section having the largest sum of the frequencies of the three consecutive sections is set as the mode value. (S507).

  On the other hand, when the section width h is not equal to or smaller than the predetermined target division width W (No in S505), a section other than the section (Th to T to T + h to T + 2h) having the largest sum of the frequencies of the three sections. Data is removed from the sample data (S506), and the processing from S502 is repeated. When there are a plurality of sections having the same sum of frequencies of three consecutive sections, for example, the one having the smallest value is selected.

  And the operation rate calculation part 204b of the operation rate calculation apparatus 100 which concerns on this invention uses the data of the mode value detected in the mode value detection part 204a to following (Formula 6)-(Formula 10). Based on this, the equipment performance operating rate, the time operating rate, etc. are calculated (S509).

Operating time = (production end substrate detection time−production start substrate detection time) × number of detections / (number of detections−1) (Expression 6)
Facility performance utilization rate = mode value x number of detections / operation time (Equation 7)
Time utilization rate = operation time / operation time (Equation 8)
Production tact = mode value (Equation 9)
Net operating time = production tact x number of detections (Equation 10)
As described above, the operating rate calculating unit 204b of the operating rate calculating apparatus 100 according to the present invention calculates the operating time using the number of detections, and uses the mode value detected by the mode value detecting unit 204a to install the equipment. It is characterized by calculating a performance utilization rate. In addition, the description by the concrete measurement data is later mentioned using FIG.10 and FIG.11.

  FIG. 6 is a reference diagram illustrating a transition state of a screen displayed on the display unit 207 of the operation rate calculation apparatus 100 according to the present invention.

  The screen control unit 206 displays the main menu screen 600 on the display unit 207 along with its activation. On the main menu screen 600, a button Bt1 labeled “production result input screen”, a button Bt2 labeled “operation rate totaling screen”, and a button Bt3 labeled “operation rate history display screen” And the operator can transition the screen displayed on the display unit 207 to the production result input screen 700, the operation rate totaling screen 800, and the operation rate history display screen 900 by selecting these buttons.

  FIG. 7 is a reference diagram illustrating an example of a production result input screen 700 displayed on the display unit 207 of the operation rate calculation apparatus 100 according to the first embodiment. It should be noted that the start / end of substrate detection by the substrate detection sensor, the model, and the like can be set via the production result input screen 700.

  In the production result input screen 700, “line name 701” for designating a line name from a plurality of mounting lines, “period 702” for designating a period for displaying a production schedule model in the designated line name, In addition, list information 703 such as a lot number, model name, production schedule, production status, production results, and the like related to the designated line name is displayed.

  Then, the operator of the operation rate calculation apparatus 100 designates the line name 701 and the period 702 via the production result input screen 700, selects the corresponding production plan, and at the time of starting production, the production of the corresponding model is performed. By changing the column of the status 704 from “Unstarted (707)” to “In production (706)”, it is possible to specify the production start, and when the production is finished, the production status 704 of the corresponding model is changed to “ The end of production can be designated by changing from “in production (706)” to “production completion (705)”.

  As described above, in the operation rate calculation apparatus 100, when the operation rate is totaled for each production model, in addition to designating the start / end of production using the start / end switch 201, the production result input screen 700 is used. The start / end of substrate detection by the substrate detection sensor can be specified for each model. As shown in FIG. 1B, the start / end signal can be automatically detected from the start / end detection unit 101 of the production apparatus provided at the most downstream part of the mounting line.

  FIG. 8 is a reference diagram of the operating rate totaling screen 800 displayed on the display unit 207 of the operating rate calculating apparatus 100 of the present invention.

  The operation rate totaling screen 800 includes a lot number 801, a model name 802, a line name 803, a production schedule 804, a production start time 805, a production end time 806, a production result 807, an equipment performance operation rate 808, etc. This information is displayed, and the operator can select a display item on the requested screen by such input processing on the setting screen. Then, for example, by specifying “line name (803)”, the operator sorts by a certain mounting line name or sorts by “equipment performance availability (808)”, thereby It is possible to display the screen in order of the low mounting line.

  That is, the operator of the operating rate calculation apparatus 100 according to the present invention refers to the operating rate totaling screen 800, monitors the operating rate of each mounting line, and if it is decreasing, removes the factor of the decrease. It becomes possible to maintain high production efficiency of the entire mounting line.

  FIG. 9 is a reference diagram of the operating rate history display screen 900 displayed on the display unit 207 of the operating rate calculating apparatus 100 of the present invention.

  Using this operation rate history display screen 900, an operator requests a history display of “period (901)”, “time (902)”, “line name (903)”, “day division (904)”, “month” By specifying “Division (905)”, it is possible to display the transition of the equipment performance utilization rate and the hourly utilization rate for a specific period (June 24 to July 5 in FIG. 9) in a specific line. Become.

  That is, the operator of the operating rate calculation device 100 according to the present invention can maintain the high production efficiency of the entire mounting line by referring to the operating rate history display screen 900 and monitoring the operating rate of each mounting line. It becomes.

  As described above, the operation rate calculation apparatus 100 according to the present invention includes the substrate detection sensor 202 that is provided in the most downstream portion of the mounting line and detects the passage of the substrate, and the passage of the substrate based on the detection signal in the substrate detection sensor 202. A calculation unit 204 that acquires the interval, detects the mode value of the passage interval, and calculates the operating rate based on the mode value.

  Therefore, the operation rate calculation apparatus 100 according to the present invention can calculate the operation rate of the mounting line with a simple configuration in which the substrate detection sensor 202 is provided in the most downstream portion of the mounting line. In addition, by calculating the operation rate using the mode value of the passage interval, it is not necessary to detect the output signal from each production device that constitutes the mounting line and identify the production device that becomes the bottleneck. The rate calculation unit 204b can calculate the operating rate of the entire line using the above-described formula.

  Furthermore, since the operation rate calculation apparatus 100 according to the first embodiment can specify the start and end of the mounting line using the start / end switch 201, the operation time is reliably detected and the operation rate is calculated. Can be performed more accurately.

Furthermore, by displaying the production result input screen 700 related to the calculated operation rate on the display unit 207, the management of the operation rate can be displayed in a visually easy-to-understand manner, and as a result, the calculated operation rate is sequentially displayed. It is possible to monitor and facilitate the management of the mounting line of the operator, analyze and remove the factor of the operating rate decrease, and maintain the high production efficiency of the entire mounting line.
<Experimental example>
Hereinafter, an experimental example in which the operation rate is actually calculated using the operation rate calculation apparatus 100 according to the present invention will be described. In the description of this experimental example, the steps corresponding to those in FIG. 5 are clearly described in order to correspond to the descriptions of the respective steps in FIG. 5 described above.

  FIG. 10 is a data table used to explain the passing interval detected using the substrate detection sensor 202 of the operating rate calculation apparatus 100 according to the present invention and the mode value detected by the mode value detection unit 204a. It is a reference figure. In this experiment, the operation rate calculation device 100 sets the data division number K = 10, the target division width W = 0.1 (minutes), and the sample minimum number Nmin = 4 (pieces), thereby operating the entire line. Is calculated.

  The table shown in FIG. 10A shows an example of sample data of the substrate passage interval detected by the substrate detection sensor 202, and the total number N of sample data is 20 (S501 in FIG. 5). Ti indicates a passage interval (minute) detected by the substrate detection sensor. As shown in this figure, the passage interval detected by the substrate detection sensor 202 is changed according to the position of the production apparatus where the trouble occurs in the case where trouble occurs in the mounting line. That is, for example, when a trouble occurs in a production apparatus downstream from a production apparatus that becomes a bottleneck, an early passage interval is detected after the passage interval is temporarily separated, and the upstream of the bottleneck production apparatus is detected. When a trouble occurs in the production apparatus on the side, the passage interval temporarily becomes a production tact for the bottleneck device although a gap is temporarily generated in the passage interval.

  Then, the mode value detection unit 204a of the operating rate calculation apparatus 100 passes through the sample data because the total number of sample data 20 is equal to or greater than the set minimum number of samples 4 (No in S502 of FIG. 5). The maximum value Tmax = 40.6 and the minimum value Tmin = 10.4 are detected (S503 in FIG. 5), and the divided section width h = (Tmax−Tmin) as shown in FIG. 10B. /K=3.02 (minutes) is acquired and divided into sections (S504 in FIG. 5), and the belonging data and the frequency (number) of each section are obtained. Here, the section width h = 3.02 (minutes) after the division becomes larger than the target division width W of 0.1 (minutes) (No in S505 in FIG. 5), as can be seen from FIG. 10 (b). In addition, the sum of the frequencies of the three intervals of the passage intervals of 10.40 to 13.42 (minutes), 13.42 to 16.44 (minutes), and 16.44 to 19.46 (minutes) is 16, which is the most frequent. Therefore, data other than the three sections of 10.40 to 19.46 (minutes), which is the section having the largest sum of the frequencies of the three sections, is removed from the sample data (S506 in FIG. 5).

  Next, the mode value detection unit 204a of the operating rate calculation apparatus 100 determines that the total number of sample data 16 is equal to or greater than the set minimum sample number 4 (No in S502 of FIG. 5). The maximum value Tmax = 12.8 and the minimum value Tmin = 10.4 of the passage interval are detected (S503 in FIG. 5), and the division process is performed again as shown in FIG. The width h = (Tmax−Tmin) /K=0.24 (minutes) is acquired and divided into sections (S504 in FIG. 5), and the data belonging and the frequency (number) of each section are obtained. Here, the section width h = 0.24 (minutes) after the division becomes larger than the target division width W of 0.1 (minutes) (No in S505 in FIG. 5), as can be seen from FIG. 10 (c). In addition, the sum of the frequencies of the three sections of the passage intervals of 12.08 to 12.32 (minutes), 12.32 to 12.56 (minutes), and 12.56 to 12.80 (minutes) is the most frequent. .

  Then, the mode value detection unit 204a removes data other than the three sections of 12.08 to 12.80 (minutes), which is the section having the largest sum of the frequencies of the three sections, from the sample data (S506 in FIG. 5), Since the total number of sample data is 9 or more than the set minimum number of samples 4 (No in S502 of FIG. 5), the maximum value Tmax = 12.8 and the minimum value Tmin = 12. 2 is detected, and the divided section width h = (Tmax−Tmin) /K=0.06 (minutes) is acquired (S504 in FIG. 5). Since the section width h is h <W with respect to the preset target section width W (0.1 minute) (Yes in S505 in FIG. 5), the mode value detection unit 204a is configured to pass the passage interval 12. An average value = 12.44 (minutes) of data in the interval 2 to 12.8 is acquired (S507 in FIG. 5), and this average value is detected as the mode value of the passage interval. That is, this average value can be approximated to the production tact of the production apparatus that becomes a bottleneck when trouble does not occur in the mounting line.

  FIG. 11 is a graph showing the relationship between the frequency division of the passing interval shown in FIG. As shown in this figure, since the frequency in the three sections 12.08 to 12.80 is 9, the mode value detection unit 204a detects the average value of these three sections as the mode interval. Yes.

  And in this invention, the operation rate detection part 204b is based on the following (Formula 11)-(Formula 13) using the mode value 12.44 (minute) obtained in the mode value detection part 204a. The facility performance operating rate and time operating rate of the entire mounting line are calculated (S509 in FIG. 5).

Operating time = (Production end board detection time−Production start board detection time) × Number of detections / (Number of detections−1) (Equation 11)
= 309 × 21/20
= 324.45 minutes Equipment performance operating rate = mode value × number of detections / operating time (Equation 12)
= 12.44 × 21 / 324.45
= 80.5%
Time utilization rate = operation time / operation time (Equation 13)
= 324.45 / (9 × 60) = 60.1%
However, it is assumed that the operation time is 9 hours from 8:00 to 17:00. As shown in the above experimental example, in the operation rate calculation device 100 according to the present invention, signals output from each production device constituting the mounting line. It is not necessary to detect the production device that becomes a bottleneck by detecting the passage of the substrate using the substrate detection sensor 202, and the mode value of the passage interval is detected by the mode value detection unit 204a. The operating rate calculation unit 204b can detect the operating rate of the entire line based on the mode value.

  In the description of the experimental example, the data division number K is set to 10, the target division width W is set to 0.1 minute, and the sample minimum number Nmin is set to 4. However, the operating rate calculation apparatus according to the present invention is described. The numerical value used in 100 is not limited to this, and the operating rate of the entire mounting line can be calculated using other values.

  Moreover, although the product produced in the mounting line was demonstrated using the board | substrate, the product produced in the mounting line where the operation rate calculation apparatus based on this invention is used is not limited to a board | substrate. Needless to say, the operating rate calculation apparatus according to the present invention can be applied to a product other than the substrate.

  The present invention has an effect of facilitating acquisition of an operation rate for improving production efficiency and consequently improving productivity. For example, an operation rate calculation device in a mounting line for producing electronic devices in a factory, etc. It becomes possible to apply as.

The external view which shows an example of the mounting line comprised including the operation rate calculation apparatus which concerns on this invention, and connecting several production apparatuses Functional block diagram showing the configuration of the operating rate calculation device according to the present invention Reference diagram showing an example of sampling of a detection signal detected by the substrate detection sensor of the operating rate calculation apparatus according to the first embodiment The flowchart which shows the operation | movement procedure of the whole operation rate calculation apparatus which concerns on this invention. The flowchart which shows the operation | movement procedure in the specific arithmetic processing in the calculating part of the operation rate calculation apparatus which concerns on this invention. Reference diagram showing the transition state of the screen displayed on the display unit of the operating rate calculation device according to the present invention Reference diagram showing an example of a production result input screen displayed on the display unit of the operation rate calculation apparatus according to the first embodiment Reference diagram of the operating rate totaling screen displayed on the display unit of the operating rate calculating device of the present invention Reference diagram of the operation rate history display screen displayed on the display unit of the operation rate calculation device of the present invention Reference diagram of the data table used for explaining the interval detected by the substrate detection sensor of the operating rate calculation apparatus according to the present invention and the mode value detected by the mode value detection unit The figure of the graph which shows the relationship between the division | segmentation area of the passage interval shown in FIG.10 (c), and frequency. Explanatory diagram for explaining the operating rate

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Operation rate calculation apparatus 101 Start / end detection part 201 Start / end switch 202 Substrate detection sensor 203 Data storage part 204 Calculation part 204a Mode value detection part 204b Operation rate calculation part 205 Operation rate accumulation part 206 Screen control part 207 Display part 600 Main menu 700 Production result input screen 800 Operation rate totaling screen 900 Operation rate history display screen

Claims (9)

An operation rate calculation device for calculating an operation rate of a mounting line composed of a plurality of production devices,
A board detection sensor that is provided at the most downstream position of the mounting line and detects the passage of the board;
A start / end designating unit that is connected to the substrate detection sensor and designates start and end of substrate detection by the substrate detection sensor by manual input or automatic input;
Based on a detection signal from the substrate detection sensor, passage interval detection means for detecting sample data of the passage interval of the substrate conveyed on the mounting line;
A mode value detecting means for detecting a mode value of the passing interval by performing a predetermined division process based on the sample data of the passing interval;
Detection number of the substrate to be detected in the substrate detection sensor, wherein the mode detected in the mode value detecting means, and, based on the operation time detected in the start / end designation means, the operation rate and a utilization ratio calculation means for calculating,
In the predetermined division processing, the mode detection means detects the maximum value and the minimum value from the sample data of the passage interval and divides the difference between the maximum value and the minimum value by a predetermined number of divisions. Is the process of calculating the section width by
The mode detection means excludes sample data of a predetermined section from the sample data of the passage interval when the section width is equal to or larger than the target division width, and the section width is less than a preset target division width. The mode value is detected by performing the predetermined division process until
The operating rate calculating device is characterized in that the operating rate calculating means calculates the operating rate using the following equation (1) .
Operation rate = mode value x number of detections / operation time (Equation 1) The start / end designation means further operating rate calculating apparatus according to claim 1, characterized in that it is provided in the production apparatus disposed most downstream position constituting the mounting line. When the interval width is equal to or larger than the target division width, the mode value detection means maximizes the sum of the sample numbers of the sample data of the passage interval in a predetermined interval continuous from the divided intervals. after eliminating the sample data of the feed intervals other than the interval, the division processing operation rate calculating apparatus according to claim 1, characterized in that again to a predetermined number. Wherein the predetermined interval is operating rate calculating apparatus according to claim 3, characterized in that the three sections. In the case where the number of samples of the sample data of the passage interval is equal to or less than a preset minimum number of samples , the mode value detecting means sets the average value of the acquired sample data as the mode value,
The utilization rate calculation means, the mode value, the sample number of the sample data, and claims, and calculates the operation rate on the basis of the between the detected Ru uptime that in the start / end designating means 1 The operating rate calculation device described. The mode value detection means calculates an average value of the sample data when the section width divided into a predetermined number is equal to or less than the target section width, and sets the average value as the mode value,
The utilization rate calculation means, the mode value, the sample number of the sample data, and claims, and calculates the operation rate on the basis of the between the detected Ru uptime that in the start / end designating means 1 The operating rate calculation device described. The operating rate calculating device according to claim 5 or 6, wherein the operating rate calculating means calculates the operating rate using the following equation (2).
Occupancy rate = mode value x number of samples of sample data / operation time (Equation 2) The operating rate calculation device further includes:
Recording means for recording a detection signal from the substrate detection sensor;
Operating rate recording means for recording the operating rate calculated by the operating rate calculating means;
The operation rate calculation device according to claim 1, further comprising display means for displaying a screen relating to the calculated operation rate. An operation rate calculation method used for an operation rate calculation device that calculates an operation rate of a mounting line composed of a plurality of production devices,
The operating rate calculation device is:
Provided at the most downstream position of the mounting line, comprising a substrate detection sensor for detecting the passage of the substrate,
The operating rate calculation method is:
A passage interval detection step of detecting sample data of a passage interval of the substrate conveyed on the mounting line based on a detection signal in the substrate detection sensor ;
A mode value detecting step for detecting a mode value of the passing interval by performing a predetermined division process based on the sample data of the passing interval;
Detection number of the substrate to be detected in the substrate detection step, the mode value detected in the mode value detecting step, and viewed including the operating rate calculation step of calculating the operation rate on the basis of the feed intervals ,
The predetermined division processing detects the maximum value and the minimum value of the passage interval from the sample data of the passage interval, and divides the difference between the maximum value and the minimum value by a predetermined number of divisions. Processing to calculate,
In the mode detection step, the mode value is detected by performing the predetermined division processing until the section width is less than a preset target division width,
In the operating rate calculating step, the operating rate is calculated by using the following equation (1) .
Operation rate = mode value x number of detections / operation time (Equation 1)

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