JP2017215645A - Transfer detection system and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer detection system and a control method that are able to prevent a re-operation from being limited due to battery exhaustion after cancellation of operation limit of a machine, in a case where transfer of the machine and the decrease in the battery voltage simultaneously occur.SOLUTION: A numerical control device 20 communicates with a transfer detection device 30, and detects transfer of a machine tool 1 and battery exhaustion of the transfer detection device 30. When transfer of the machine tool 1 and battery exhaustion of the transfer detection device 30 are detected, the numerical control device 20 limits operation of the machine tool 1. The numerical control device 20 detects the decrease in the battery voltage of the transfer detection device 30 as well. When transfer of the machine tool 1 is detected, the numerical control device 20 pop-up displays a transfer warning screen on a display section 12. When the decrease in the battery voltage is detected, a voltage warning screen is pop-up displayed on the display section 12. When transfer of the machine tool 1 and the decrease in the battery voltage are simultaneously detected, the voltage warning screen is pop-up displayed so as to have priority over the transfer warning screen.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a relocation detection system and a control method.

  The relocation detection system disclosed in Patent Document 1 includes a numerical control device and a relocation detection device. The numerical control device controls the operation of the machine tool. The relocation detection device detects relocation by vibration generated when the machine tool is relocated. When the relocation detection device detects the relocation of the machine tool, the numerical control device restricts the operation of the machine tool. The numerical control device limits the operation of the machine tool even when the battery of the relocation detection device runs out. When the numerical control device restricts the operation of the machine tool, the user needs to request the machine tool manufacturer to release the operation restriction.

Japanese Patent No. 5397270

  When the battery voltage of the relocation detection device decreases, the numerical control device displays a voltage warning screen on the display unit of the operation panel. When the relocation of the machine tool is detected at the same time when the battery voltage drops, the numerical control device restricts the operation of the machine tool and displays the relocation warning screen on the display, but there is a possibility that the voltage warning screen will not be displayed. . If the voltage warning screen is not displayed, the user cannot recognize the battery voltage drop. The user requests the machine tool manufacturer to release the operation restriction without replacing the battery. If the battery runs out after the operation restriction is released, the numerical control device restricts the operation of the machine tool again. The user has to ask the machine tool manufacturer to release the operation restriction again, which is troublesome. There was also a problem that it took more time before the machine tool could be used.

  An object of the present invention is to provide a relocation detection system and a control method capable of preventing the operation from being restricted again due to the battery running out after the operation restriction of the machine is released when the relocation of the machine and the decrease in the battery voltage occur simultaneously. is there.

  The relocation detection system according to claim 1 is a relocation determination unit for determining relocation of the machine based on output information of the relocation detection unit capable of detecting relocation of the machine, and a battery depletion for determining whether the relocation detection unit is out of battery. When the determination means and the relocation determination means determine that the machine has been relocated, or when the battery depletion determination means determines that the battery has run out, a restriction means that restricts the operation of the machine; and the restriction means In the relocation detection system comprising a release means for canceling the restriction of the operation by the voltage reduction determination means for determining a voltage drop at which the voltage of the battery is equal to or lower than a threshold, and the relocation determination means, the machine has been relocated. If it is determined, the transfer notification means for notifying the transfer of the machine, and the voltage drop determination means determines that the voltage drop has occurred, Voltage drop notifying means for notifying the voltage drop, and when the transfer determining means determines that the machine has been transferred and the voltage drop determining means determines that the voltage drop has occurred, the voltage drop notifying means The voltage drop is notified preferentially over the notification by the relocation notification means. When the battery voltage drop of the transfer detection means and the machine transfer occur at the same time, the transfer detection system notifies the battery voltage drop more preferentially than the machine transfer. Therefore, the relocation detection system can prevent the user from releasing the operation restriction of the machine before the battery replacement, and the operation of the machine is restricted again after the operation restriction is released.

  According to a second aspect of the present invention, in the transfer detection system according to the first aspect of the present invention, in addition to the configuration of the first aspect, the relocation determination means determines that the machine has been relocated, and the voltage drop determination means determines that the voltage drop has occurred. In this case, the voltage drop notification means notifies the voltage drop, and the relocation notification means does not notify the relocation of the machine. Therefore, the relocation detection system can prompt the user to replace the battery before canceling the operation restriction of the machine.

  In addition to the configuration of the invention according to claim 1 or 2, the relocation detection system according to claim 3 is configured so that the notification by the relocation notification unit and the notification by the voltage drop notification unit are displayed on the display screen in the foreground. It is characterized by performing pop-up display. Since the relocation detection system pops up a screen for notifying relocation and voltage drop on the display unit, the relocation and voltage drop can be promptly noticed by the user.

  According to a fourth aspect of the present invention, there is provided a relocation determination step for determining relocation of the machine based on output information of relocation detection means capable of detecting relocation of the machine, and a battery depletion determination for determining whether the relocation detection means is out of battery. A step of restricting the operation of the machine, and a step of restricting the operation of the machine when it is determined that the machine has been relocated in the relocation determining step In the control method of the relocation detection system including a release step of releasing the restriction of the operation by a step, a voltage drop determination step for determining a voltage drop at which the voltage of the battery is equal to or lower than a threshold value, and the machine in the relocation determination step If it is determined that the voltage drop has occurred in the relocation notification step for notifying the relocation of the machine, and the voltage drop determination step A voltage drop notifying step for notifying the voltage drop, determining that the machine has been moved in the relocation determining step, and determining that the voltage drop has occurred in the voltage drop determining step. In the notification step, the voltage drop is notified preferentially over the notification in the relocation notification step. The relocation detection system can obtain the effect described in claim 1 by performing the above steps.

  In the present invention, a part of the configurations of claims 1 to 3 may be arbitrarily combined.

1 is a block diagram showing an electrical configuration of a relocation detection system 100. The conceptual diagram which shows the various storage areas of RAM23. The flowchart of operation control processing. The flowchart of a cancellation | release process. The flowchart of a voltage drop determination process. The flowchart of a warning display control process. The figure of the display part 12 which the voltage warning screen 61 displayed as a pop-up. The figure of the display part 12 which the relocation warning screen 62 displayed as a pop-up.

  An embodiment of the present invention will be described. The configuration, processing, and the like of the system described below are merely illustrative examples, and are not intended to limit only to that unless otherwise specified. The drawings are used to explain technical features that can be adopted by the present invention.

  The configuration of the relocation detection system 100 will be described with reference to FIG. The relocation detection system 100 includes a numerical control device 20 and a relocation detection device 30. The numerical controller 20 is stored in a control box (not shown) provided in the machine tool 1, for example. The machine tool 1 is, for example, a machine that rotates a tool at a high speed to perform cutting or the like on a workpiece. The numerical controller 20 controls the operation of the machine tool 1 by executing an NC program. The NC program is composed of a plurality of blocks including various control commands, and controls various operations including axis movement of the machine tool 1, tool change, and the like in units of blocks. The relocation detection device 30 is attached to the machine tool 1 and detects the relocation of the machine tool 1 by detecting vibration generated in the machine tool 1. The numerical control device 20 and the relocation detection device 30 can communicate with each other. When the transfer detection device 30 detects the transfer of the machine tool 1, the numerical control device 20 restricts the operation of the machine tool 1. Since the user cannot use the machine tool 1, the user requests the machine tool manufacturer to release the operation restriction. Based on a request from the user, the machine tool manufacturer distributes to the user a release key for releasing the operation restriction of the machine tool 1, and the user releases the operation restriction using the release key.

  The electrical configuration of the numerical controller 20 will be described with reference to FIG. The numerical controller 20 includes a CPU 21, a ROM 22, a RAM 23, a storage device 24, a mechanical I / F unit 25, an AC / DC converter 26, a relocation I / F unit 27, and the like. The CPU 21 comprehensively controls the operation of the numerical controller 20. The ROM 22 stores an operation control program, a cancellation program, a voltage drop determination program, a warning display control program, and the like. The operation of each program will be described later. Each program may be stored in a nonvolatile storage device, EEPROM (registered trademark), HDD (hard disk drive), or the like as a computer-readable storage medium. The RAM 23 includes various storage areas (see FIG. 2) to be described later, and temporarily stores various information such as flags. The storage device 24 is nonvolatile and stores various information in addition to the NC program. The CPU 21 can store in the storage device 24 an NC program or the like read by an external input in addition to the NC program input by the user on the operation panel 11 provided in the machine tool 1.

  The machine I / F unit 25 is connected to the shaft drive unit (not shown) of the machine tool 1 and the operation panel 11. The shaft drive unit includes drive shafts such as an X axis, a Y axis, a Z axis, a QT axis, an A1 axis, an A2 axis, a B1 axis, and a B2 axis. The X-axis, Y-axis, and Z-axis are drive shafts that move the main shaft and the workpiece relatively in the X-axis direction (left-right direction), Y-axis direction (front-rear direction), and Z-axis direction (up-down direction). The QT axis is a drive shaft of a turntable (not shown) that holds the work. The A1, A2, B1, and B2 axes are additional axes. The operation panel 11 is provided on the cover 10 (see FIG. 1) of the machine tool 1 and includes a display unit 12 and an input unit (not shown). The display unit 12 displays various screens such as a setting screen and an operation screen. The input unit is, for example, a physical switch, button, touch panel, or the like. The input unit includes a power switch (not shown). The AC / DC converter 26 is connected to an external AC power supply 28 and converts AC supplied from the AC power supply 28 into DC. The AC / DC converter 26 is connected to an I / F unit 35 (to be described later) of the relocation detection device 30 in addition to the AC power supply 28.

  With reference to FIG. 1, the electrical configuration of the relocation detection device 30 will be described. The relocation detection device 30 includes a CPU 31, a storage device 32, a vibration detector 33, a battery 34, an I / F unit 35, and the like. The CPU 31 comprehensively controls the operation of the relocation detection device 30. The storage device 32 is nonvolatile. The transfer detection device 30 detects the transfer of the machine tool 1 using the vibration detector 33. The vibration detector 33 detects vibration generated in the machine tool 1. The method for detecting relocation may be other than the method for detecting vibration, and for example, a method for detecting acceleration, inclination, or the like may be employed. For example, a dry battery can be used as the battery 34 and is stored in a battery box (not shown) provided on the side of the control box of the machine tool 1. The I / F unit 35 is connected to the relocation I / F unit 27 of the numerical controller 20 and the AC / DC converter 26, respectively. When the power switch provided on the operation panel 11 of the machine tool 1 is on, the AC / DC converter 26 supplies a part of the current converted from alternating current to direct current to the I / F unit 35. When the power switch is turned from on to off, the AC / DC converter 26 cuts off the power supply to the I / F unit 35, so the relocation detection device 30 uses the power supplied by the battery 34.

  The storage area of the RAM 23 will be described with reference to FIG. The RAM 23 of the numerical controller 20 includes a relocation detection flag storage area 231, a battery low flag storage area 232, various information storage areas 233, and the like. The relocation detection flag storage area 231 stores a relocation detection flag. The relocation detection flag is set to 1 when the relocation detection device 30 detects relocation of the machine tool 1 and is set to 0 (zero) when relocation is not detected. The battery low flag storage area 232 stores a battery low flag. The battery low flag is set to 1 when the supply voltage from the battery 34 of the relocation detection device 30 (hereinafter referred to as the battery voltage) drops below the first threshold, and set to 0 (zero) when it exceeds the first threshold. To do. For example, the first threshold value may be set to a voltage value higher than the second threshold value, which is a voltage value that the relocation detection device 30 cannot drive. The various information storage area 233 stores various other information.

  The operation of the relocation detection device 30 will be described. The CPU 31 of the relocation detection device 30 monitors at a predetermined cycle whether or not the vibration detector 33 has detected the vibration of the machine tool 1. For example, when a suspicious person tries to relocate the machine tool 1 from the factory, the machine tool 1 is vibrated. The vibration detector 33 detects vibration generated in the machine tool 1. The CPU 31 stores the detection result of the vibration detector 33 in the storage device 32 using, for example, a flag. The CPU 31 measures the battery voltage at a predetermined period and stores it in the storage device 32. When the CPU 31 receives a confirmation signal to be described later from the numerical control device 20, the CPU 31 transmits information including the detection result of the vibration detector 33 and the measured battery voltage to the numerical control device 20 as a response signal.

  The operation control process will be described with reference to FIG. When the power switch is turned on, the CPU 21 of the numerical controller 20 reads the operation control program from the ROM 22 and executes this processing.

  CPU21 transmits a confirmation signal with respect to the moving detection apparatus 30 (S1). When receiving the confirmation signal, the CPU 31 of the relocation detection device 30 returns information including the detection result of the vibration detector 33 and the measured battery voltage as a response signal. The CPU 21 determines whether a response signal has been received (S2). Until the response signal is received (S2: NO), the CPU 21 returns to S2 and waits. When the response signal is received (S2: YES), the CPU 21 determines whether or not the relocation of the machine tool 1 is detected based on the received response signal (S3). When the transfer of the machine tool 1 is detected (S3: YES), since the machine tool 1 may have been transferred illegally by a suspicious person or the like, the CPU 21 restricts the operation of the machine tool 1 (S7). The restriction of the operation includes, for example, start / stop of the machine tool 1, drive stop of the shaft drive unit, operation stop by the operation panel 11, and the like. Therefore, when the machine tool 1 is moved illegally, the machine tool 1 cannot operate. The CPU 21 sets the relocation detection flag stored in the RAM 23 to 1 (S8), and ends this process. As will be described later, when the transfer of the machine tool 1 is detected, the CPU 21 restricts the operation of the machine tool 1 and pops up a transfer warning screen 62 (see FIG. 8) on the display unit 12. Therefore, the user can recognize that the operation of the machine tool 1 has stopped because the transfer of the machine tool 1 has been detected.

  When the transfer of the machine tool 1 is not detected (S3: NO), the CPU 21 determines whether or not the battery has run out in the transfer detection device 30 based on the response signal (S4). The battery exhaustion is a voltage value (second threshold value) at which the relocation detection device 30 cannot be driven, and may be determined based on, for example, whether the battery voltage is equal to or lower than the second threshold value. When the battery has not run out (S4: NO), the CPU 21 permits the operation of the machine tool 1 (S5). Therefore, the user can use the machine tool 1 normally. The CPU 21 sets the relocation detection flag stored in the RAM 23 to 0 (S6), and ends this process.

  When the battery has run out in the transfer detection device 30 (S4: YES), the CPU 21 restricts the operation of the machine tool 1 in the same manner as when the transfer is detected (S7). If the power switch is turned off, the power supply source of the relocation detection device 30 is switched from the AC power supply 28 to the battery 34. Since the relocation detection device 30 cannot be driven in a state where the battery has run out, the relocation detection system 100 cannot detect relocation of the machine tool 1. Therefore, the CPU 21 limits the operation of the machine tool 1 and prevents the machine tool 1 from operating in a state where the transfer detection device 30 cannot detect the transfer of the machine tool 1. The CPU 21 sets the relocation detection flag stored in the RAM 23 to 1 (S8), and ends this process.

  The release process will be described with reference to FIG. When the CPU 21 restricts the operation of the machine tool 1 by the operation control process (see FIG. 3), the machine tool 1 stops its operation. The user cannot use the machine tool 1. The user requests the machine tool manufacturer to release the operation restriction. The machine tool manufacturer notifies the user of a release key necessary for the release operation. The release operation is performed, for example, by inputting a release key to the operation panel 11 in a state where the operation of the machine tool 1 is limited. When the CPU 21 receives the input of the release key, the CPU 21 reads the release program from the ROM 22 and executes this processing. The CPU 21 releases the operation restriction of the machine tool 1 (S11). The CPU 21 initializes the relocation detection flag stored in the RAM 23 to 0 (S12), and ends this process.

  The voltage drop determination process will be described with reference to FIG. This process is a process for determining a decrease in the battery voltage of the relocation detection device 30. When the power switch is turned on, the CPU 21 reads the voltage drop determination program from the ROM 22 at predetermined intervals and executes this processing. The period for executing this process is, for example, 20 msec, and is shorter than the period for executing a warning display control process described later (for example, 30 msec). The CPU 21 refers to the response signal received from the relocation detection device 30 and determines whether or not the battery voltage is equal to or lower than the first threshold value (S21). When the battery voltage is higher than the first threshold (S21: NO), since the risk of running out of the battery in a short time is low, the CPU 21 sets the battery low flag stored in the RAM 23 to 0 (S22), and performs this process. finish. When the battery voltage is equal to or lower than the first threshold (S21: YES), the battery voltage is low and there is a high risk of causing the battery to run out in a short time, so the CPU 21 sets the battery low flag to 1 (S23). This process is terminated.

  The warning display control process will be described with reference to FIG. This process is a process of notifying the user by displaying various warning screens on the display unit 12 when a drop in the battery voltage of the transfer detection device 30 or a transfer of the machine tool 1 is detected. When the power switch is turned on, the CPU 21 reads the warning display control program from the ROM 22 at predetermined intervals (for example, 30 msec) and executes this processing.

-When battery voltage drop is detected-
CPU21 judges whether the battery low flag memorize | stored in RAM23 is 1 (S31). When the battery low flag is 1 (S31: YES), since the battery voltage is low, the CPU 21 displays, for example, an alarm display “relocation detection device battery replacement time” in the message column 40 located at the top of the display unit 12. Perform (S33). The relocation detection system 100 promptly notifies the user that it is time to replace the battery 34 of the relocation detection device 30.

The CPU 21 determines whether or not there is a user operation (hereinafter referred to as panel operation) on the operation panel 11 (S34). When there is no panel operation (S34: NO), the CPU 21 determines whether or not the state without the panel operation has continued for 10 minutes or more (S35). When the state where there is no panel operation continues for 10 minutes or more (S35: YES), the CPU 21 pops up and displays the voltage warning screen 61 on the foreground at the center of the display unit 12 so as to be conspicuous (S37). FIG. 7 shows a state where the voltage warning screen 61 is popped up on the front side of the manual condition setting screen 51 on the display unit 12. The manual condition setting screen 51 is a screen for setting manual conditions for each drive axis. The voltage warning screen 61 displays the following warnings (1) to (4), for example.
(1) The replacement time of the battery 34 of the relocation detection device 30 has come.
(2) The battery voltage of the relocation detection device 30 is reduced.
(3) Replace all batteries in the battery box on the side of the control box promptly with the power switch turned on.
(4) When the power switch is turned off, there is a possibility of detecting relocation.

  If the user turns off the power switch with the battery voltage lowered, the power supply source is switched from the AC power supply 28 to the battery 34, and the battery is likely to run out in a short time. When the battery runs out, the CPU 21 restricts the operation of the machine tool 1 in the above-described operation restriction process (see FIG. 3), as in the case of moving detection. The user must ask the machine tool manufacturer to release the operation restriction, which is troublesome. Therefore, the CPU 21 can display the warning (4) on the voltage warning screen 61 and prevent the user from turning off the power switch when the battery voltage is low. The relocation detection system 100 can prevent the operation of the machine tool 1 from being unnecessarily limited. Thereafter, the CPU 21 ends this process.

  For example, even if the battery low flag is 1 (S31: YES), when there is no panel operation for less than 10 minutes (S34: NO, S35: NO), the user may perform the panel operation again. Therefore, the CPU 21 ends this processing without popping up the voltage warning screen 61 (S36). In this process executed after the next cycle, when there is no panel operation for 10 minutes or longer (S35: YES), the CPU 21 pops up the voltage warning screen 61 because the user is unlikely to perform the panel operation immediately. Displayed (S37). Therefore, the relocation detection system 100 can reliably notify the user that the battery voltage of the relocation detection device 30 is decreasing.

  In the state where the voltage warning screen 61 is pop-up displayed, the battery voltage of the relocation detection device 30 is only lowered, so various settings using the operation panel 11 are effective. For example, when the voltage warning screen 61 pops up over the manual condition setting screen 51 due to a decrease in battery voltage, the user may want to set manual conditions on the manual condition setting screen 51. Therefore, when there is a panel operation by the user in this processing executed after the next cycle (S34: YES), the CPU 21 deletes the voltage warning screen 61 (S36). Since all the manual condition setting screen 51 is displayed, the user can set manual conditions on the manual condition setting screen 51. Thereafter, the CPU 21 ends this process.

  For example, after the voltage warning screen 61 is erased by panel operation, the user may leave the machine tool 1 for 10 minutes or more. There is a possibility that the user forgets that the battery voltage is reduced by leaving the machine tool 1 once. When the state where there is no panel operation continues for 10 minutes or more (S35: YES), the CPU 21 pops up the voltage warning screen 61 again (S37). The user can return to the work place and reconfirm the voltage warning screen 61 pop-up displayed on the display unit 12, so that the battery can be replaced without forgetting. That is, when the battery voltage is low, the CPU 21 repeatedly pops up the voltage warning screen 61 on the display unit 12 every time when there is no panel operation for 10 minutes or more. It can be surely notified that it has decreased. Thereafter, the CPU 21 ends this process.

-When relocation is detected-
When the battery low flag is 0 (S31: NO), since the battery voltage is sufficient, the CPU 21 determines whether or not the relocation detection flag is 1 (S32). When the relocation detection flag is 1 (S32: YES), since the relocation of the machine tool 1 has been detected, the CPU 21 displays, for example, “Detect relocation” in the message field 40 located at the top of the display unit 12, as shown in FIG. Is displayed (S38) to promptly notify the user that the relocation of the machine tool 1 has been detected.

The CPU 21 determines whether or not there is a panel operation on the operation panel 11 (S39). When there is no panel operation (S39: NO), the CPU 21 determines whether or not the state without the panel operation has continued for 10 minutes or more (S40). When the state where there is no panel operation continues for 10 minutes or more (S40: YES), the CPU 21 pops up and displays a large transfer warning screen 62 on the foreground at the center of the display unit 12 (S37). FIG. 8 shows a state in which the relocation warning screen 62 is popped up on the front side of the manual condition setting screen 51 on the display unit 12. The relocation warning screen 62 displays, for example, the following warnings (1) and (2).
(1) The transfer detection device 30 detects the transfer of the machine tool 1.
(2) To contact the machine tool manufacturer in order to remove the operation restriction.

  Therefore, CPU21 can alert | report reliably that the transfer of the machine tool 1 was detected with respect to the user. As described above, when the relocation detection device 30 detects relocation, the CPU 21 restricts the operation of the machine tool 1 by the operation control process (see FIG. 3). At the same time, in the warning display control process (see FIG. 7), the CPU 21 displays an alarm on the display unit 12 (S38), and pops up a relocation warning screen 62 (S41). Therefore, the user can easily recognize that the operation of the machine tool 1 is limited because the transfer of the machine tool 1 is detected. Thereafter, the CPU 21 ends this process.

  For example, even if the relocation detection flag is 1 (S32: YES), if the state where there is no panel operation is less than 10 minutes (S39: NO, S40: NO), the CPU 21 issues a relocation warning as when the battery low flag is 1. This process is terminated without popping up the screen 62 (S42). In this process executed after the next cycle, when the state of no panel operation continues for 10 minutes or longer (S39: NO, S40: YES), the CPU 21 pops up a relocation warning screen 62 (S41). Therefore, the relocation detection system 100 can reliably notify the user that the relocation of the machine tool 1 has been detected.

  In the state where the relocation warning screen 62 is displayed in a pop-up, various settings using the operation panel 11 are valid as in the case of the voltage warning screen 61. When there is a panel operation by the user in a state where the relocation warning screen 62 is popped up (S39: YES), the CPU 21 deletes the relocation warning screen 62 (S42). Since all the manual condition setting screen 51 is displayed, the user can set manual conditions on the manual condition setting screen 51. Thereafter, the CPU 21 ends this process.

  For example, as in the case of the voltage warning screen 61, the user may leave the machine tool 1 for more than 10 minutes after the relocation warning screen 62 is erased by panel operation. The user may forget that he / she has detected the relocation of the machine tool 1 by leaving the machine tool 1 once. When no panel operation continues for 10 minutes (S40: YES), the CPU 21 pops up the relocation warning screen 62 again (S41). The user can return to the work place and reconfirm the relocation warning screen 62 pop-up displayed on the display unit 12, so that a quick response such as contacting a machine tool manufacturer can be performed in order to release the operation restriction. Thereafter, the CPU 21 ends this process.

  As described above, in the warning display control process shown in FIG. 6, after determining whether or not the battery low flag is 1 (S31), the CPU 21 determines whether or not the relocation detection flag is 1 (S32). That is, the CPU 21 confirms the decrease in the battery voltage prior to the transfer of the machine tool 1. Therefore, when the relocation of the machine tool 1 and the decrease in the battery voltage of the relocation detection device 30 are detected at the same time, the CPU 21 restricts the operation of the machine tool 1 and the voltage on the display unit 12 based on the fact that the battery low flag is 1. A warning screen 61 is popped up.

  If the relocation warning screen 62 is displayed in a pop-up, the user requests the machine tool manufacturer to cancel the operation restriction of the machine tool 1 without replacing the battery of the relocation detection device 30. Without performing battery replacement, the machine tool manufacturer distributes the release key to the user, and the user releases the operation restriction using the release key. There is a high possibility that the operation of the machine tool 1 is restricted again. The user must again ask the machine tool manufacturer to release the operation restriction. The relocation detection system 100 according to the present embodiment pops up the voltage warning screen 61 without displaying the relocation warning screen 62 when the relocation of the machine tool 1 and the decrease in the battery voltage of the relocation detection device 30 are detected at the same time. Thus, the user can be surely prompted to replace the battery. Therefore, the relocation detection system 100 can prevent the operation of the machine tool 1 from being restricted again by causing the battery to run out after the restriction on the operation of the machine tool 1 is released.

  When the battery of the relocation detection device 30 is replaced before the user requests the machine tool manufacturer to release the operation restriction, the battery voltage exceeds the first threshold in the voltage drop determination process shown in FIG. Therefore (S21: NO), the CPU 21 sets the battery low flag to 0 (S22). In the warning display control process shown in FIG. 6, the battery low flag is 0 (S31: NO), but the relocation detection flag is 1 (S32: YES), so the CPU 21 displays “Relocation” in the message column 40 of the display unit 12. Is detected "(S38), and the relocation warning screen 62 is displayed in a pop-up instead of the voltage warning screen 61 (S41). Therefore, the user can recognize that the operation of the machine tool 1 is restricted due to the detection of the transfer of the machine tool 1. The user requests the machine tool manufacturer to release the operation restriction. Since the battery voltage of the relocation detection device 30 is sufficient, the relocation detection system 100 can prevent the battery from running out after the operation restriction of the machine tool 1 is released and the operation of the machine tool 1 from being restricted again.

  In the above description, the relocation detection device 30 in FIG. 1 is an example of the relocation detection means of the present invention. The machine tool 1 is an example of the machine of the present invention. The CPU 21 that executes the determination process of S3 is an example of the relocation determination means of the present invention. The CPU 21 that executes the determination process of S4 is an example of a battery exhaustion determination unit of the present invention. The CPU 21 that executes the process of S7 is an example of the limiting means of the present invention. The CPU 21 that executes the process of S11 is an example of a release unit of the present invention. The CPU 21 that executes the determination process of S21 is an example of a voltage drop determination unit of the present invention. CPU21 which performs the process of S41 is an example of the transfer alerting | reporting means of this invention. CPU21 which performs the process of S37 is an example of the voltage drop alerting | reporting means of this invention. The voltage warning screen 61 shown in FIG. 7 and the relocation warning screen 62 shown in FIG. 8 are examples of the notification screen of the present invention.

  The determination step of S3 executed by the CPU 21 is an example of the relocation determination step of the present invention. The determination step of S4 is an example of a battery exhaustion determination step of the present invention. Step S7 is an example of the limiting process of the present invention. Step S11 is an example of the release process of the present invention. Step S21 is an example of a voltage drop determination process of the present invention. Step S41 is an example of the relocation notification process of the present invention. Step S37 is an example of the voltage drop notification process of the present invention.

  As described above, the relocation detection system 100 of this embodiment includes the numerical control device 20 and the relocation detection device 30. The numerical control device 20 determines the relocation of the machine tool 1 and the relocation detection device 30 running out of battery based on the response signal of the relocation detection device 30. The numerical control device 20 restricts the operation of the machine tool 1 when it is determined that the machine tool 1 has been moved or when it is determined that the battery has run out. In order to release the operation restriction, the user needs to request the machine tool manufacturer to release the operation control. In such a relocation detection system 100, the numerical control device 20 can also determine a decrease in the battery voltage of the relocation detection device 30. When it is determined that the machine tool 1 has been relocated, the numerical controller 20 displays a relocation warning screen 62 on the display unit 12 to notify the user that the relocation of the machine tool 1 has been detected. When determining that the battery voltage has decreased, the numerical controller 20 displays a voltage warning screen 61 on the display unit 12 to notify the user of the decrease in the battery voltage. When the numerical controller 20 detects the relocation of the machine tool 1 and the decrease in the battery voltage at the same time, the numerical control device 20 displays the voltage warning screen 61 with priority over the relocation warning screen 62. Therefore, the relocation detection system 100 can prevent the operation of the machine tool 1 from being restricted again due to running out of the battery after the operation restriction of the machine tool 1 is released.

  Needless to say, the present invention is not limited to the above-described embodiment, and various modifications are possible. In the above-described embodiment, the transfer warning screen 62 or the voltage warning screen 61 is pop-up displayed on the display unit 12 to notify the transfer of the machine tool 1 or the battery voltage drop. Notification using means or notification by sound may be used, or a combination thereof may be used.

  In the above embodiment, the period for executing the voltage drop control process is 20 msec and the period for executing the warning display control process is 30 msec, but each period can be freely changed. However, the cycle for executing the voltage drop control process is preferably shorter than the cycle for executing the warning display control process.

  The above embodiment pops up the voltage warning screen 61 when the state where there is no panel operation of the operation panel 11 continues for 10 minutes or more after detecting a decrease in the battery voltage, but it is not limited to 10 minutes and can be changed freely. It is. For example, when a drop in battery voltage is first detected, the voltage warning screen 61 pops up regardless of the panel operation, and after erasing with the panel operation, the voltage is displayed when there is no panel operation for 10 minutes or longer. The warning screen 61 may be displayed as a pop-up. The same applies to the relocation warning screen 62. In the present embodiment, the voltage warning screen 61 or the relocation warning screen 62 is displayed in a pop-up so as to cover the other screens in the center of the forefront of the display unit 12. You may make it display in emphasis at a predetermined position.

  The relocation detection device 30 of the above embodiment detects the vibration of the machine tool 1, but may detect the vibration of a machine other than the machine tool.

  Although the transfer detection device 30 of the above embodiment is attached to the machine tool 1, for example, only the vibration detector 33 may be attached to the machine tool 1.

  The operation restriction process (see FIG. 3), the release process (see FIG. 4), the voltage drop process (see FIG. 5), and the warning display control process (see FIG. 6) of the above embodiment are not limited to the examples executed by the CPU 21. Other electronic components (for example, ASIC) may execute.

DESCRIPTION OF SYMBOLS 1 Machine tool 12 Display part 20 Numerical control apparatus 21 CPU
30 Relocation Detection Device 34 Battery 61 Voltage Warning Screen 62 Relocation Warning Screen 100 Relocation Detection System

Claims (4)

Based on the output information of the relocation detecting means capable of detecting the relocation of the machine, the relocation determining means for determining relocation of the machine, the battery depletion determining means for determining battery depletion of the relocation detecting means, and the relocation determining means When it is determined that the machine has been relocated, or when the battery exhaustion determination unit determines that the battery has run out, a restriction unit that restricts the operation of the machine, and a release unit that releases the restriction of the operation by the restriction unit In the relocation detection system with
Voltage drop determining means for determining a voltage drop at which the voltage of the battery is equal to or lower than a threshold;
When the relocation determining means determines that the machine has been relocated, relocation notifying means for notifying the relocation of the machine;
A voltage drop notification means for notifying the voltage drop when the voltage drop determination means determines that the voltage drop has occurred;
When the relocation determining means determines that the machine has been relocated, and the voltage drop determining means determines that the voltage drop has occurred, the voltage drop notifying means has priority over the notification by the relocation notification means. A relocation detection system that reports a voltage drop. When the relocation determination means determines that the machine has been relocated, and the voltage drop determination means determines that the voltage drop has occurred, the voltage drop notification means notifies the voltage drop, and the transfer notification means The relocation detection system according to claim 1, wherein the relocation detection system is not notified of the relocation of the machine. 3. The relocation detection system according to claim 1, wherein the notification by the relocation notification unit and the notification by the voltage drop notification unit are performed in a pop-up display in which a notification screen is displayed on the foreground in the display unit. Based on output information of the relocation detecting means capable of detecting relocation of the machine, a relocation determining step for determining relocation of the machine, a battery depletion determining step for determining whether the relocation detecting unit is out of battery, and the relocation determining step. When it is determined that the machine has been relocated, or when it is determined that the battery has run out in the battery exhaustion determination step, a restriction step for restricting the operation of the machine, and the restriction on the operation by the restriction step is released. In the control method of the relocation detection system comprising a release step,
A voltage drop determination step for determining a voltage drop at which the voltage of the battery is equal to or lower than a threshold;
If it is determined in the relocation determination step that the machine has been relocated, a relocation notification step for notifying the relocation of the machine,
When it is determined that the voltage drop has occurred in the voltage drop determination step, the voltage drop notification step of notifying the voltage drop,
When it is determined in the relocation determination step that the machine has been relocated, and it is determined that the voltage decrease has occurred in the voltage drop determination step, the voltage drop notification step has priority over the notification in the relocation notification step. The control method is characterized by notifying the voltage drop.

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