JP6759944B2 - Relocation detection system and control method - Google Patents

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 the relocation by the vibration generated when the machine tool is relocated. When the relocation detector detects the relocation 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, the numerical control device limits the operation of the machine tool. When the numerical control device restricts the operation of the machine tool, the user needs to request the machine tool manufacturer to lift the operation restriction.

Japanese Patent No. 5397270

When the battery voltage of the relocation detection device drops, the numerical control device displays a voltage warning screen on the display of the operation panel. The operator replaces the battery of the relocation detection device and operates the operation unit of the operation panel. The relocation detector finishes displaying the voltage warning screen. The relocation detection system avoids running out of battery in the relocation detection device in advance. However, there is a possibility that the operator operates the operation unit without replacing the battery after the voltage warning screen is displayed by the numerical control device. The battery of the numerical control device may run out, and the numerical control device may limit the operation of the machine tool.

An object of the present invention is to provide a relocation detection system and a control method capable of avoiding the battery exhaustion of the relocation detection means in advance.

The relocation detection system of the first aspect of the present invention has a mounting portion on which a battery can be mounted, and is based on the relocation detecting means capable of detecting the relocation of a machine by the power of the battery and the output information of the relocation detecting means. When the relocation determination means for determining the relocation of the machine, the battery exhaustion determination means for determining the battery exhaustion of the battery mounted on the mounting portion, and the relocation determination means determine that the machine has been relocated, or the battery When the dead battery determination means determines that the battery has run out, the mounting unit is provided in a relocation detection system including a limiting means for limiting the operation of the machine and a releasing means for releasing the restriction on the operation by the limiting means. A state in which it is determined that the battery mounted on the battery is in a specific state in which it is time to replace the battery when the mounting time, which is the time elapsed since the battery is mounted on the mounting portion, has passed. When the determination means and the state determination means determine that the battery is in the specific state, the notification means for notifying the specific state of the battery and the mounting time are shorter than the specific time. When the pre-determination means for determining whether or not the pre-specific time has elapsed and the pre-determination means determine that the pre-specific time has elapsed, the advance of the pre-specific time is notified. When the advance notification means and the advance notification means notify the passage of the advance specific time, or when the notification means notifies the specific state of the battery, whether or not the battery has been replaced is determined. The replacement determination means is provided with a replacement determination means for determining, and the advance notification means notifies the elapse of the advance specific time until the replacement determination means determines that the battery has been replaced, and the replacement determination means notifies the battery. Is characterized in that the notification means notifies the specific state until it is determined that the battery has been replaced. According to the above configuration, when the battery reaches a specific state, the notification means notifies the specific state of the battery. The operator who recognizes the specific state of the battery executes the battery replacement work. The notification means notifies the specific state of the battery until the replacement determination means determines that the battery has been replaced. Therefore, it is easy for the operator to perform the battery replacement operation before the battery is switched from the specific state to the dead battery state. Therefore, the relocation detection system can avoid running out of the battery of the relocation detection means in advance.

The longer the instrumentation wearing time, the battery is likely to be in a particular state. Since the relocation detection system determines the state of the battery based on the mounting time, it is easy to avoid running out of the battery in advance.

When the thing before informing means for informing the course of the pre-specified time, the worker can perform the replacement of the battery. The relocation detection system is more likely to avoid running out of battery in advance.

The relocation detection system includes a voltage detection unit that detects a potential difference in the mounting unit, and when the potential difference detected by the voltage detection unit becomes less than a predetermined threshold value, the state determination means uses the battery. It may be determined that it is in the specific state. When the battery is in a specific state, the potential difference in the mounting portion where the battery is mounted becomes a predetermined value or less. Since the relocation detection system determines whether or not the battery is in a specific state based on the potential difference in the mounting portion, it is easy to avoid running out of the battery in advance.

The relocation detection system includes a voltage detection unit that detects a potential difference in the mounting unit, and when the potential difference detected by the voltage detection unit becomes less than a predetermined threshold value and then exceeds the threshold value, the replacement is performed. The determination means may determine that the battery has been replaced. When the battery is in a specific state, the notification means notifies the specific state of the battery until the potential difference in the mounting portion becomes from less than the threshold value to more than the threshold value. Therefore, the operator can reliably perform the replacement work of the battery in the specific state.
The relocation detection system of the second aspect of the present invention has a mounting portion on which a battery can be mounted, and is based on the relocation detecting means capable of detecting the relocation of a machine by the power of the battery and the output information of the relocation detecting means. A relocation determination means for determining the relocation of the machine, a battery exhaustion determination means for determining the battery exhaustion of the battery mounted on the mounting portion, and a relocation determination means for determining that the machine has been relocated, or the battery. When the dead battery determination means determines that the battery has run out, the mounting unit is provided in a relocation detection system including a limiting means for limiting the operation of the machine and a releasing means for releasing the restriction on the operation by the limiting means. When the state determining means for determining whether or not the battery mounted on the battery is in a specific state in which it is time to replace the battery and the state determining means determine that the battery is in the specific state, the said A notification means for notifying the specific state of the battery, a replacement determination means for determining whether or not the battery mounted on the mounting portion has been replaced when the notification means notifies the specific state of the battery, and the above. The state determination means includes a voltage detection unit that detects a potential difference in the mounting unit , and the state determination means means that the battery is mounted when a specific time has elapsed, which is the time elapsed since the battery was mounted on the mounting portion. Is determined to be in the specific state, and when the mounting time does not elapse the specific time, the voltage detection unit detects a potential difference in the mounting unit, and the detected potential difference is less than a predetermined threshold value. When becomes, the battery is determined to be in the specific state.

The control method according to the third aspect of the present invention is the relocation detection means of the relocation detection system, which has a mounting portion on which a battery can be mounted and includes a relocation detection means capable of detecting the relocation of a machine by the power of the battery. Based on the output information, the relocation determination step of determining the relocation of the machine, the battery exhaustion determination step of determining the battery exhaustion of the battery mounted on the mounting portion, and the relocation determination step determined that the machine has been relocated. If, or when the battery depletion determination process is determined to have occurred the dead battery, the relocation detection with a limiting step for limiting the operation of the machine, and a release step for releasing the restriction of the operation by the restricting step In the control method of the system, when the mounting time, which is the time elapsed since the battery mounted on the mounting portion is mounted on the mounting portion, has passed a specific time, it is time to replace the battery. a state determining step of determining that the particular state, the state determination step, when the battery is determined to the a specific state, and a notification step of notifying the specific state of the battery, the mounting time, When the pre-determination step for determining whether or not the pre-specific time, which is shorter than the specific time, has elapsed and the pre-determination step determine that the wearing time has elapsed the pre-specific time, When the advance notification step for notifying the passage of the advance specific time and the advance notification step notify the passage of the advance specific time, or when the notification step notifies the specific state of the battery. The pre-notification step notifies the elapse of the pre-specified time until the replacement determination step determines that the battery has been replaced, and includes a replacement determination step for determining whether or not the battery has been replaced. The notification step is characterized in that the specific state is notified until the replacement determination step determines that the battery has been replaced. The control method of the third aspect has the same effect as the relocation detection system of the first aspect.
The control method according to the fourth aspect of the present invention is the relocation detection means of the relocation detection system, which has a mounting portion on which a battery can be mounted and includes a relocation detection means capable of detecting the relocation of a machine by the power of the battery. Based on the output information, the relocation determination step of determining the relocation of the machine, the battery exhaustion determination step of determining the battery exhaustion of the battery mounted on the mounting portion, and the relocation determination step determined that the machine has been relocated. In this case, or when the battery exhaustion determination step determines that the battery exhaustion has occurred, a relocation detection system including a restriction step for limiting the operation of the machine and a release step for releasing the restriction on the operation by the restriction step. In the control method of the above, the state determination step of determining whether or not the battery mounted on the mounting portion is in a specific state in which it is time to replace the battery and the state determination step of the battery are the specific states. When the determination is made, the notification step for notifying the specific state of the battery, and when the notification step notifies the specific state of the battery, whether or not the battery mounted on the mounting portion has been replaced. The state determination step includes a replacement determination step for determining, and in the state determination step, the battery is in the specific state when a specific time elapses, which is the time elapsed since the battery was attached to the mounting portion. If it is determined that there is, and the mounting time does not elapse, the voltage detection unit that detects the potential difference in the mounting portion detects the potential difference in the mounting portion, and the detected potential difference is predetermined. When the value becomes less than the threshold value, the battery is determined to be in the specific state.

The perspective view of the relocation detection system 1. The perspective view of the control box 9. The block diagram which shows the electrical structure of the relocation detection system 1. Flow diagram of operation restriction processing. Flow diagram of release processing. Flow chart of battery inspection process. The figure of the display part 12 which pop-applied the notice warning screen 61. The figure of the display part 12 which pop-applied the exchange warning screen 62. The figure of the display part 12 which pop-applied the warning screen 63.

An embodiment of the present invention will be described. Unless otherwise specified, the system configuration, processing, etc. described below are not intended to be limited thereto, but are merely explanatory examples. The drawings are used to illustrate the technical features that can be adopted by the present invention. In the following description, the left and right, front and back, and up and down indicated by arrows in the figure are used.

The configuration of the relocation detection system 1 will be described with reference to FIG. The relocation detection system 1 includes a machine tool 10, a numerical control device 20 (see FIG. 3), and a relocation detection device 30 (see FIG. 3). The machine tool 10 is a machine that performs processing such as cutting on a work piece with a tool. The numerical control device 20 controls the operation of the machine tool 10 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 and tool change of the machine tool 10 in block units. The relocation detection device 30 detects the relocation of the machine tool 10 by detecting the vibration generated in the machine tool 10. The numerical control device 20 and the relocation detection device 30 can communicate with each other. When the relocation detection device 30 detects the relocation of the machine tool 10, the numerical control device 20 limits the operation of the machine tool 10. Since the user cannot use the machine tool 10, the machine tool manufacturer is requested to lift the operation restriction. Based on the request from the user, the machine tool manufacturer distributes a release key for releasing the operation restriction of the machine tool 10 to the user, and the user releases the operation restriction by using the release key.

The machine tool 10 includes a base 2 and a main body 6. The base 2 is installed on the floor. The main body 6 is a box-shaped body provided on the base 2. The main body 6 accommodates a table, a spindle head, a tool changer, a drive unit, and the like. The table is equipped with the work piece. The table can be moved in the X-axis direction (horizontal direction) and the Y-axis direction (front-back direction). The spindle head can be moved in the Z-axis direction (vertical direction) on the upper side of the table. The spindle head rotatably supports the spindle. The spindle extends in the vertical direction and mounts the tool. The spindle can rotate integrally with the tool. The tool changer can change the tool mounted on the spindle. The drive unit includes an X motor, a Y motor, a Z motor, a spindle motor, and a magazine motor. The X and Y motors move the table. The Z motor moves the spindle head. The spindle motor rotates the spindle. The magazine motor drives the tool changer. The machine tool 10 processes a workpiece with a tool by moving the rotating spindle and the table relative to each other.

The front wall portion of the main body 6 includes an opening / closing door 7, a display unit 12, and an input unit 13. The opening / closing door 7 is provided so as to be slidable. The opening / closing door 7 opens and closes the inside of the main body 6 by sliding. The display unit 12 displays various information. The display unit 12 displays various screens such as a setting screen and an operation screen. The input unit 13 is below the display unit 12. The input unit 13 is, for example, a physical switch, a button, a touch panel, or the like. The input unit includes a power switch (not shown), a reset key (not shown), and the like.

As shown in FIGS. 1 and 2, the rear wall portion of the main body 6 includes a control box 9. The control box 9 houses the numerical control device 20 (see FIG. 3) and the relocation detection device 30 (see FIG. 3). The left wall portion of the control box 9 includes a mounting portion 36 and a cover 17. The mounting portion 36 has a box shape that opens toward the left. The operator can mount the battery 34 (see FIG. 3) inside the mounting portion 36. The battery 34 mounted on the mounting unit 36 can supply electric power to the relocation detection device 30. The battery 34 is, for example, a plurality of dry batteries. The number of dry batteries is four as an example.

The cover 17 includes a frame body 15 and a plate-shaped body 16. The frame body 15 is rectangular and plate-shaped. One end of the frame 15 is rotatably connected to the control box 9. The plate-shaped body 16 is fitted inside the frame body 15. The cover 17 rotates between an open position (see FIG. 2) and a closed position (not shown). The cover 17 in the open position opens the mounting portion 36. When the cover 17 is in the open position, the operator can replace the battery 34 mounted on the mounting portion 36. The cover 17 in the closed position closes the mounting portion 36.

The electrical configuration of the numerical control device 20 will be described with reference to FIG. The numerical control device 20 includes a CPU 21, a ROM 22, a RAM 23, a storage device 24, a timer 29, 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 control device 20. The RAM 23 temporarily stores various types of information. The RAM 23 includes a storage area for storing the relocation detection flag. The relocation detection flag is set to "1" when the relocation detection device 30 detects the relocation of the machine tool 10 or when the battery of the battery 34, which will be described later, runs out. The relocation detection flag is set to "0" when the relocation detection device 30 does not detect the relocation of the machine tool 10 and when the battery of the battery 34 has not run out. The ROM 22 stores an operation restriction program, a release program, a battery inspection program, and the like. The processing based on each program will be described later. Each program may be stored in a non-volatile storage device as a computer-readable storage medium, EEPROM (registered trademark), HDD (hard disk drive), or the like. The RAM 23 temporarily stores various types of information. The storage device 24 is non-volatile and stores various information in addition to the NC program. In addition to the NC program input by the user via the input unit 13, the CPU 21 can also store the NC program or the like read by the external input in the storage device 24. The timer 29 measures the mounting time, which is the time elapsed since the battery 34 was mounted on the mounting unit 36.

The machine I / F unit 25 is connected to each of the drive unit, the display unit 12, and the input unit 13 of the machine tool 10. The CPU 21 drives and controls the drive unit via the machine I / F unit 25 to control the machining operation of the machine tool 10. The CPU 21 displays various information on the display unit 12 via the mechanical I / F unit 25. The CPU 21 receives various types of input information from the input unit 13 via the mechanical I / F unit 25. The AC / DC converter 26 is connected to an AC power supply 28 provided outside the relocation detection system 1 and converts the AC power supplied by the AC power supply 28 into DC power. The AC / DC converter 26 is connected not only to the AC power supply 28 but also to the I / F unit 35 described later of the relocation detection device 30.

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 mounting unit 36, a voltage detection unit 37, an I / F unit 35, and the like. The CPU 31 controls the operation of the relocation detection device 30 in an integrated manner. The storage device 32 is non-volatile. The storage device 32 stores the detection result of the vibration detector 33, for example, with a flag or the like. The relocation detection device 30 detects the relocation of the machine tool 10 by using the vibration detector 33. The vibration detector 33 detects the vibration generated in the machine tool 10. The method of detecting the relocation may be other than the method of detecting vibration, and for example, a method of detecting acceleration, inclination, or the like can be adopted. The mounting unit 36 is electrically connected to the voltage detecting unit 37. The voltage detection unit 37 detects the potential difference in the mounting unit 36. Therefore, the voltage detection unit 37 can detect the voltage of the battery 34.

The I / F unit 35 is connected to the relocation I / F unit 27 of the numerical control device 20 and the AC / DC converter 26, respectively. When the power switch of the input unit 13 of the machine tool 10 is on, the AC / DC converter 26 supplies a part of the electric power converted from alternating current to direct current to the I / F unit 35. In this case, the relocation detection device 30 operates by the electric power supplied by the AC / DC converter 26. When the power switch of the input unit 13 is turned off from on, the AC / DC converter 26 cuts off the power supply to the I / F unit 35. In this case, the relocation detection device 30 operates by the electric power supplied by the battery 34.

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 10. For example, when a suspicious person attempts to illegally relocate the machine tool 10 from the factory, the machine tool 10 vibrates. The vibration detector 33 detects the vibration generated in the machine tool 10. The CPU 31 stores the detection result of the vibration detector 33 in the storage device 32. Further, the CPU 31 acquires a detection voltage, which is a potential difference detected by the voltage detection unit 37, at a predetermined cycle. When the CPU 31 receives the confirmation signal described later from the numerical control device 20, the CPU 31 transmits the detection result of the vibration detector 33 and information including various determination results based on the acquired detection voltage to the numerical control device 20 as a response signal. The relocation detection device 30 executes the above operation by the power supplied by the AC / DC converter 26 or the power supplied by the battery 34.

The replacement of the battery 34 will be described. The battery 34 deteriorates as power is supplied to the relocation detection device 30, and eventually the battery runs out. The dead battery is a state of the battery 34 in which proper power cannot be supplied to the relocation detection device 30. Hereinafter, the detection voltage of the voltage detection unit 37 when the battery 34 that has been supplying appropriate power is switched to the dead battery is referred to as a first threshold value. By the operator performing the battery 34 replacement before the battery 34 runs out, the relocation detection system 1 uses the power supplied by the battery 34 while the power switch of the machine tool 10 is off. Relocation can be detected reliably. The battery 34 is in a specific state to be replaced before the battery runs out. The battery 34 in the specific state can supply appropriate electric power to the relocation detection device 30.

Specific states of the present embodiment include a replacement state and a LOW state. The replacement state is the state of the battery 34 when the mounting time elapses. The specific time is, for example, a time for ensuring a predetermined safety factor with respect to the time until the battery 34 mounted on the mounting unit 36 in the unused state runs out of battery. The specific time is one year as an example. If the relocation detection system 1 operates in a normal environment, the detection voltage of the voltage detection unit 37 is larger than the first threshold value when the battery 34 is in the replaced state. The LOW state is the state of the battery 34 when the detection voltage of the voltage detection unit 37 becomes equal to or lower than the second threshold value, which is a predetermined threshold value higher than the first threshold value. When the battery 34 is in the LOW state, the battery 34 is being switched to the dead battery. If the relocation detection system 1 continues to operate in a high or low temperature environment that deviates from the temperature range determined by the specifications, for example, the deterioration of the battery 34 is accelerated. As a result, the battery 34 goes into the LOW state before the mounting time of the battery 34 elapses. When the battery 34 is replaced under a normal environment, the detection voltage of the voltage detection unit 37 is equal to or higher than the second threshold value.

The operation restriction process will be described with reference to FIG. When the power switch is turned on, the CPU 21 of the numerical control device 20 reads the operation restriction program from the ROM 22 and executes this process. The CPU 21 transmits a confirmation signal to the relocation detection device 30 (S1). After receiving the confirmation signal, the CPU 31 of the relocation detection device 30 acquires the detection result of the vibration detector 33 by referring to the flag information stored in the storage device 32. Upon receiving the confirmation signal, the CPU 31 further determines whether or not the detection voltage of the voltage detection unit 37 is equal to or less than the first threshold value, thereby determining whether or not the battery of the battery 34 has run out. The CPU 21 returns the detection result of the vibration detector 33 and the information indicating whether or not the battery has run out to the CPU 31 as a response signal (S1). The CPU 21 determines whether or not the response signal has been received (S2). The CPU 21 returns to S2 and waits until the response signal is received (S2: NO).

When the response signal is received (S2: YES), the CPU 21 determines whether or not the relocation of the machine tool 10 has been detected based on the received response signal (S3). When the received response signal includes information indicating the relocation detection of the machine tool 10, the CPU 21 determines that the relocation of the machine tool 10 has been detected (S3: YES), and limits the operation of the machine tool 10 (S7). For example, the CPU 21 executes the start / stop of the machine tool 10, the drive control stop of the drive unit of the machine tool 10, the reception stop of various instructions input via the input unit 13, and the like (S7). Therefore, when a suspicious person illegally relocates the machine tool 10, the machine tool 10 cannot operate. For example, the CPU 21 pops up a warning screen (not shown) on the display unit 12 (S7). Therefore, the user can recognize that the operation of the machine tool 10 has stopped because the relocation of the machine tool 10 has been detected. The CPU 21 sets the relocation detection flag stored in the RAM 23 to 1 (S8), and ends the operation restriction process.

When the CPU 21 determines that the relocation of the machine tool 10 has not been detected (S3: NO), the CPU 21 determines whether or not the battery of the battery 34 has run out based on the response signal from the CPU 31 (S4). When the response signal from the CPU 31 indicates that the battery has run out, the CPU 21 determines that the battery has run out (S4: YES), and shifts the process to S7. When the response signal from the CPU 31 indicates that the battery has not run out, the CPU 21 determines that the battery has not run out (S4: NO) and permits the operation of the machine tool 10 (S5). Therefore, the user can use the machine tool 10 normally. After executing S5, the CPU 21 sets the storage transfer detection flag in the RAM 23 to 0 (S6), and ends the operation restriction process.

The release process will be described with reference to FIG. When the CPU 21 restricts the operation of the machine tool 10 by the operation restriction process (see FIG. 4), the machine tool 10 stops the operation. The user cannot use the machine tool 10. The user requests the machine tool manufacturer to lift the operation restriction. The machine tool manufacturer notifies the user of the release key required for the release operation. The release operation is performed, for example, by inputting a release key to the input unit 13 in a state where the operation of the machine tool 10 is restricted. 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 process. The CPU 21 releases the operation restriction of the machine tool 10 (S11). The CPU 21 initializes the storage transfer detection flag in the RAM 23 to 0 (S12), and ends this process.

The battery inspection process will be described with reference to FIGS. 6 to 9. The battery inspection process is a process executed by the CPU 21 at a predetermined cycle when the transfer detection flag of the memory stored in the RAM 23 is “0” after the operation restriction process is executed. The predetermined period is, for example, 40 ms. The CPU 21 reads the stored battery inspection program into the ROM 22 and executes the battery inspection process.

The CPU 21 determines whether or not the battery 34 is in the pre-replacement state (S21). The pre-replacement state is the state of the battery 34 that is about to be replaced. Specifically, the pre-replacement state is a state of the battery 34 when the mounting time of the battery 34 elapses and becomes less than the specific time, which is shorter than the specific time. The pre-specified time is, for example, one week shorter than the specified time. The CPU 21 acquires T, which is the value measured by the timer 29, and determines whether or not the following equation (A) holds (S21).
T2 ≤ T <T1 ... (A)
In the formula (A), T1 is a specific time and T2 is a pre-specific time.

As shown in FIGS. 6 and 7, when the formula (A) is satisfied, the CPU 21 determines that the battery 34 is in the pre-replacement state (S21: YES), and controls the display unit 12 to notify the replacement of the battery 34. Warning display is executed (S24). In other words, the CPU 21 notifies that the mounting time has elapsed in advance (S24). For example, the display unit 12 displays an alarm in the message field 40, "Notice of periodic replacement of the battery of the relocation detection device" (S24). Further, the display unit 12 pops up the notice warning screen 61 over the manual condition setting screen 51 below the message field 40. The manual condition setting screen 51 is a screen for setting manual conditions for the drive unit of the machine tool 10. The notice warning screen 61 displays, for example, the following warnings (1) and (2).
(1) The cause of the pop-up display of the warning / warning screen 61 is that the battery 34 has been replaced in advance.
(2) Battery 34 replacement procedure.
The operator can recognize the pre-replacement state of the battery 34 and replace the battery 34. The CPU 21 shifts the process to S28.

As shown in FIGS. 6 and 8, when the formula (A) does not hold, the CPU 21 determines that the battery 34 is not in the pre-replacement state (S21: NO), and determines whether or not the battery 34 is in the replacement state. (S22). The CPU 21 acquires T, which is the value measured by the timer 29, and determines whether or not the following equation (B) holds (S21).
T> T1 ... (B)
For example, when the power switch of the machine tool 10 is turned off for a long period of time, the formula (A) does not hold (S21: NO) and the formula (B) holds. When the formula (B) is satisfied, the CPU 21 determines that the battery 34 is in the replacement state (S22: YES), controls the display unit 12, and executes a warning display for replacement of the battery 34 (S25). In other words, the CPU 21 notifies the replacement state of the battery 34 (S25). For example, the display unit 12 displays an alarm in the message field 40 that says “relocation detection device battery periodic replacement” (S24). Further, the display unit 12 covers the manual condition setting screen 51 and displays the replacement warning screen 62 in a pop-up manner. The exchange warning screen 62 displays, for example, the following warnings (1) and (2).
(1) The cause of the pop-up display on the replacement warning screen 62 is that the battery 34 has been replaced.
(2) Battery 34 replacement procedure.
The operator can recognize the replacement state of the battery 34 and replace the battery 34.

The CPU 21 limits the operation of the machine tool 10 (S26). For example, the CPU 21 executes the drive control stop of the drive unit of the machine tool 10 (S26). The CPU 21 shifts the process to S28.

As shown in FIGS. 6 and 9, when the equation (B) does not hold, the CPU 21 determines that the battery 34 is not in the replacement state (S22: NO), and determines whether the battery 34 is in the LOW state (S23). .. For example, the CPU 21 transmits a confirmation signal to the CPU 31 (S23). Upon receiving the confirmation signal, the CPU 31 acquires the detection voltage of the voltage detection unit 37 and determines whether or not the acquired detection voltage is equal to or less than the second threshold value. The CPU 31 outputs a determination result based on the detection voltage to the CPU 21 as a response signal. When the detection voltage is higher than the second threshold value, the CPU 21 that has received the response signal determines that the battery 34 is not in the LOW state (S23: NO), and ends the battery inspection process.

When the detection voltage is equal to or lower than the second threshold value, the CPU 21 determines that the battery 34 is in the LOW state (S23: YES), controls the display unit 12, and executes a warning display of a voltage drop of the battery 34 (S27). ). In other words, the CPU 21 notifies the LOW state of the battery 34 (S27). For example, the display unit 12 displays in the message field 40, "Please replace the relocation detection device battery without turning off the power" (S27). Further, the display unit 12 covers the manual condition setting screen 51 and displays the warning screen 63 in a pop-up manner. The warning screen 63 displays, for example, the following warnings (1) and (2).
(1) The cause of the pop-up display of the warning screen 63 is that the battery 34 is in the LOW state.
(2) Battery 34 replacement procedure.
(3) If the battery 34 is replaced while the power switch of the machine tool 10 is off, the relocation detection system 1 may detect the relocation.
The operator can recognize the LOW state of the battery 34 and replace the battery 34. The CPU 21 shifts the process to S28.

The CPU 21 determines whether or not the replacement of the battery 34 is completed based on the detection voltage of the voltage detection unit 37 (S28). For example, the CPU 21 transmits a confirmation signal to the CPU 31 (S28). The CPU 31 that has received the confirmation signal acquires the detection voltage of the voltage detection unit 37. The CPU 31 determines whether or not the acquired detection voltage exceeds the second threshold value after reaching 0 V. If the detection voltage does not reach 0V, or if the second threshold value is not exceeded after the detection voltage reaches 0V, the CPU 31 returns information indicating that the conditions are not satisfied to the CPU 21 as a response signal ( S28). The CPU 21 determines that the replacement of the battery 34 is not completed (S28: NO), and shifts the process to S21. When the CPU 21 continuously executes S24, S25, or S27, the display unit 12 continuously executes the warning display.

For example, the operator rotates the cover 17 from the closed position to the open position to remove the battery 34 from the mounting portion 36. The detection voltage is maintained at 0V until the new battery 34 is installed (S28: NO). Further, when the operator mistakenly mounts the deteriorated battery 34 on the mounting portion 36, the detection voltage does not exceed the second threshold value after reaching 0V (S28: NO). The CPU 21 continuously executes the warning display (S24, S25, S27).

When the operator properly completes the battery 34, the detection voltage of the voltage detection unit 37 exceeds the second threshold value after reaching 0V. The CPU 31 returns information indicating that the condition is satisfied to the CPU 21 as a response signal (S28). The CPU 21 determines that the replacement of the battery 34 is completed (S28), and shifts the process to S29. After installing the battery 34, the operator rotates the cover 17 from the open position to the closed position.

The CPU 21 executes a reset process (S29). For example, when an operator operates the reset key of the input unit 13, the CPU 21 accepts the operation of the reset key and executes the reset process. The CPU 21 stops the warning display executed in S24, S25, or S27, and resets the timer 29 (S29). When the CPU 21 has executed S26, the operation restriction is released (S29). The operator can operate the input unit 13 while looking at the display unit 12 to normally start the machining operation of the machine tool 10.

In the above description, the relocation detection device 30 is an example of the relocation detection means of the present invention. The second threshold is an example of a predetermined threshold of the present invention. The CPU 21 that executes S3 is an example of the relocation determination means of the present invention. The CPU 21 that executes S4 is an example of the battery exhaustion determining means of the present invention. The CPU 21 that executes S7 is an example of the limiting means of the present invention. The CPU 21 that executes S11 and S12 is an example of the releasing means of the present invention. The CPU 21 that executes S22 and S23 is an example of the state determination means of the present invention. The CPU 21 that executes S25 and S27 is an example of the notification means of the present invention. The CPU 21 that executes S28 is an example of the exchange determination means of the present invention. The CPU 21 that executes S21 is an example of the preliminary determination means of the present invention. The CPU 21 that executes S24 is an example of the advance notification means of the present invention.

The CPU 21 that executes S3 is an example of the relocation determination step of the present invention. The CPU 21 that executes S4 is an example of the battery exhaustion determination process of the present invention. The CPU 21 that executes S7 is an example of the limiting process of the present invention. The CPU 21 that executes S11 and S12 is an example of the release step of the present invention. The CPU 21 that executes S22 and S23 is an example of the state determination process of the present invention. The CPU 21 that executes S25 and S27 is an example of the notification process of the present invention. The CPU 21 that executes S28 is an example of the exchange determination step of the present invention. The CPU 21 that executes S21 is an example of the predetermination step of the present invention. The CPU 21 that executes S24 is an example of the advance notification process of the present invention.

As described above, when the battery 34 is in a specific state (S22: YES, S23: YES), the CPU 21 controls the display unit 12 to execute a warning display (S25, S27). Since the operator can recognize the specific state of the battery 34, the operator executes the replacement work of the battery 34. Until the replacement work of the battery 34 is completed (S28: NO), the CPU 21 shifts the process to S21 and notifies the specific state of the battery 34 (S25, S27). Therefore, it is easy for the operator to perform the replacement work of the battery 34 before the battery 34 is in the dead battery state. Therefore, the relocation detection system 1 can avoid running out of the battery 34 in advance.

The longer the battery 34 is attached, the easier it is for the battery 34 to be in a specific state. The CPU 21 determines whether or not the battery 34 is in the replacement state based on the value of the timer 29 that measures the mounting time of the battery 34. Therefore, the relocation detection system 1 can easily avoid running out of the battery 34 in advance.

When the battery 34 is in the pre-replacement state before the replacement state (S21: YES), the CPU 21 notifies the pre-replacement state of the battery 34 (S24). The CPU 21 shifts the process to S21 until the replacement of the battery 34 is completed (S28: NO). The operator recognizes the pre-replacement state of the battery 34 and executes the replacement work of the battery 34. Therefore, the relocation detection system 1 is more likely to avoid running out of the battery 34 in advance.

When the battery 34 is in the LOW state, the detection voltage of the voltage detection unit 37 becomes equal to or lower than the second threshold value. Since the relocation detection system 1 determines whether or not the battery 34 is in the LOW state based on the potential difference of the mounting portion 36 (S23), it is easy to avoid running out of the battery 34 in advance.

After the detection voltage of the voltage detection unit 37 becomes 0V, which is a value less than the second threshold value, the CPU 21 shifts the processing to S21 until it becomes the second threshold value or more (S28: NO). For example, when the operator leaves the relocation detection system 1 with the battery 34 removed from the mounting portion 36, the detection voltage does not switch from 0V (S28: NO). For example, when the operator mistakenly mounts the deteriorated battery 34 on the mounting portion 36, the detection voltage does not exceed the second threshold value after reaching 0V (S28: NO). The CPU 21 determines that the replacement work of the battery 34 is incomplete (S28: NO), and continues the warning display (S25, S27). Therefore, the operator can surely execute the replacement work of the battery 34 in the replacement state and the LOW state.

The present invention is not limited to the above embodiment. The relocation detection device 30 of the above embodiment detects the relocation of the machine tool 10, but it may also detect the relocation of a type of machine other than the machine tool. The relocation detection device 30 of the above embodiment is attached to the machine tool 10, but for example, only the vibration detector 33 may be attached to the machine tool 10. Instead of arranging the relocation detection device 30 inside the control box 9, it may be provided, for example, on the bottom wall of the main body 6 of the machine tool 10.

The CPU 31 acquires the detection voltage of the voltage detection unit 37 in response to the confirmation signal from the CPU 21, and does not determine whether or not the acquired detection voltage satisfies the predetermined conditions of the equations (A), (B) and the like. May be good. For example, the CPU 21 may directly acquire the detection voltage of the voltage detection unit 37 via the I / F unit 35 of the relocation detection device 30. In this case, the CPU 21 may determine whether or not the predetermined conditions such as the equations (A) and (B) are satisfied based on the acquired detection voltage.

At the time of battery 34 replacement determination (S28), the CPU 31 determines whether or not the detection voltage of the voltage detection unit 37 has switched to 0V below the second threshold value, but instead determines whether or not the detection voltage is below the second threshold value and greater than 0V. It may be determined whether or not the switch is made to less than. When the battery 34 is in the LOW state (S23: YES), the CPU 21 does not determine whether or not the detection voltage of the voltage detection unit 37 has been switched to 0V, but only determines whether or not the detection voltage exceeds the second threshold value. You may judge. When determining the replacement of the battery 34, the CPU 31 determines whether or not the detection voltage of the voltage detection unit 37 exceeds the second threshold value, but determines whether or not the detection voltage exceeds the fourth threshold value larger than the second threshold value. May be good. The fourth threshold value may be a value close to the detection voltage of the voltage detection unit 37 when the unused battery 34 is mounted on the mounting unit 36.

The timer 29 may be provided in the relocation detection device 30 instead of the numerical control device 20. In this case, the CPU 31 may acquire the timed value of the timer 29, determine whether or not the equation (B) and the like are satisfied, and transmit information including the determination result to the CPU 31 (S22). The timer 29 provided in the relocation detection device 30 may time the time for which the battery 34 supplies power to the relocation detection device 30 instead of timing the mounting time of the battery 34. The timer 29 of the present modification stops the time counting while the AC / DC converter 26 supplies power to the relocation detection device 30, while the timer 29 executes the time measurement while the battery 34 supplies power to the relocation detection device 30. ..

The relocation detection system 1 does not have to include the timer 29. For example, the CPU 21 may acquire the battery 34 replacement date and time in the reset process of S29 and store the acquired date and time in, for example, the storage device 24. The CPU 21 can determine whether or not the battery 34 is in the replaced state depending on whether or not the specific time has elapsed from the date and time of storage in the storage device 24 (S22). The CPU 31 may store the replacement date and time of the battery 34 in the storage device 32 instead of the storage device 24 instead of the CPU 21. In this case, the CPU 31 may determine whether the battery 34 is in the replaced state and output the determination result to the CPU 21.

The CPU 21 does not have to execute S22, S23, and S25 to S27. In the present modification, the pre-replacement state is an example of the specific state of the present invention, the CPU 21 that executes S21 is an example of the state determination means of the present invention, and the CPU 21 that executes S24 is the notification means of the present invention. This is an example.

The relocation detection system 1 may include a sensor such as a limit switch instead of the voltage detection unit 37. The limit switch is electrically connected to, for example, the CPU 21. The limit switch may be fixed to the mounting portion 36 so that it can be brought into contact with and detached from the cover 17. When the cover 17 is in the closed position, the limit switch contacts the cover 17 and outputs an off signal. When the cover 17 is in the open position, the limit switch outputs an on signal at a distance from the cover 17. The CPU 21 can determine whether or not the cover 17 opens and closes the mounting portion 36 by determining whether or not the output signal of the limit switch is switched in the order of the off signal, the on signal, and the off signal. Since the cover 17 opens and closes the mounting portion 36 with the replacement of the battery 34, the CPU 21 can determine whether or not the replacement of the battery 34 is completed (S28). In addition, instead of the limit switch, for example, a transmission type sensor may be provided in the mounting portion 36. The transmission type sensor can detect whether or not the cover 17 is in the closed position, for example, and may output an on signal and an off signal to, for example, the CPU 21 according to the detection result.

The limit switch may be fixed to the mounting portion 36 so that it can be brought into contact with and detached from the battery 34 instead of the cover 17, for example. The battery 34 mounted on the mounting portion 36 comes into contact with the limit switch. The battery 34 removed from the mounting portion 36 is separated from the limit switch. The limit switch may output an on signal and an off signal to the CPU 21 in response to contact or non-contact with the battery 34. Therefore, the CPU 21 can determine whether or not the replacement work of the battery 34 is completed by determining whether or not the output signal of the limit switch has been switched twice (S28).

The operation restriction process, release process, and battery inspection process of the above embodiment are not limited to the example executed by the CPU 21, and may be executed by an electronic component such as AISC in addition to the CPU 31.

1 Relocation detection system 21 CPU
30 Relocation detection device 34 Battery 36 Mounting unit 37 Voltage detection unit

Claims (6)

A relocation detecting means having a mounting portion on which a battery can be mounted and capable of detecting the relocation of a machine with the electric power of the battery,
A relocation determination means for determining the relocation of the machine based on the output information of the relocation detection means, and
A battery exhaustion determining means for determining the battery exhaustion of the battery mounted on the mounting portion, and
When the relocation determining means determines that the machine has been relocated, or when the battery exhaustion determining means determines that the battery has run out, the limiting means for limiting the operation of the machine and the limiting means.
And canceling means for canceling the limitation of the operation by the restricting means
In the relocation detection system equipped with
It is said that the battery mounted on the mounting portion is in a specific state in which it is time to replace the battery when the mounting time, which is the time elapsed since the battery is mounted on the mounting portion, has passed. State determination means for determination and
When the state determination means determines that the battery is in the specific state, the notification means for notifying the specific state of the battery and the notification means.
Preliminary determination means for determining whether or not the pre-specified time, which is shorter than the specific time, has elapsed.
When the pre-determining means determines that the wearing time has elapsed the pre-specified time, the pre-notifying means for notifying the elapse of the pre-specified time
When the advance notification means notifies the elapse of the advance specific time, or when the notification means notifies the specific state of the battery, the exchange determination means for determining whether or not the battery has been replaced. With
Until the replacement determination means determines that the battery has been replaced, the advance notification means notifies the elapse of the advance specific time.
A relocation detection system, characterized in that the notification means notifies the specific state until the replacement determination means determines that the battery has been replaced. A voltage detection unit for detecting a potential difference in the mounting unit is provided.
The potential difference by the voltage detecting unit has detected, if it becomes less than a predetermined threshold, the state determination means, relocation of claim 1, wherein the battery is characterized in that it determines that the a specific state Detection system. A voltage detection unit for detecting a potential difference in the mounting unit is provided.
1. The replacement determination means determines that the battery has been replaced when the potential difference detected by the voltage detection unit becomes equal to or greater than the threshold after becoming less than a predetermined threshold. Or the relocation detection system according to 2. A relocation detecting means having a mounting portion on which a battery can be mounted and capable of detecting the relocation of a machine with the electric power of the battery, and a relocation detecting means.
Based on the output information of the relocation detecting means, the relocation determining means for determining the relocation of the machine and the relocation determining means.
A battery exhaustion determining means for determining the battery exhaustion of the battery mounted on the mounting portion, and
When the relocation determining means determines that the machine has been relocated, or when the battery exhaustion determining means determines that the battery has run out, the limiting means for limiting the operation of the machine and the limiting means.
And canceling means for canceling the limitation of the operation by the restricting means
In the relocation detection system equipped with
A state determining means for determining whether or not the battery mounted on the mounting portion is in a specific state in which it is time to replace the battery.
When the state determination means determines that the battery is in the specific state, the notification means for notifying the specific state of the battery and the notification means.
When the notification means notifies the specific state of the battery, the replacement determination means for determining whether or not the battery mounted on the mounting portion has been replaced , and
With the voltage detection unit that detects the potential difference in the mounting unit
With
The state determination means
When the mounting time, which is the time elapsed since the battery was mounted on the mounting portion, has passed a specific time, it is determined that the battery is in the specific state.
When the mounting time does not elapse the specific time, the voltage detecting unit detects the potential difference in the mounting unit, and when the detected potential difference becomes less than a predetermined threshold value, the battery is said to be the battery. A relocation detection system characterized by determining that it is in a specific state . The relocation of the machine is determined based on the output information of the relocation detection means of the relocation detection system having a mounting portion on which the battery can be mounted and having the relocation detecting means capable of detecting the relocation of the machine by the electric power of the battery. Relocation judgment process and
A battery exhaustion determination step for determining the battery exhaustion of the battery mounted on the mounting portion, and
When the relocation determination step determines that the machine has been relocated, or when the battery exhaustion determination process determines that the battery has run out, a restriction step that limits the operation of the machine and
A release step of releasing the restriction of the operation by the limiting step
In the control method of the relocation detection system provided with
It is said that the battery mounted on the mounting portion is in a specific state in which it is time to replace the battery when the mounting time, which is the time elapsed since the battery is mounted on the mounting portion, has passed. The state judgment process to judge and
When the state determination step determines that the battery is in the specific state, the notification step for notifying the specific state of the battery and the notification step.
A pre-determination step of determining whether or not the pre-specified time, which is shorter than the specific time, has elapsed, and
When the pre-determination step determines that the wearing time has elapsed the pre-specified time, the pre-notifying step for notifying the elapse of the pre-specified time
When the advance notification step notifies the elapse of the advance specific time, or when the notification step notifies the specific state of the battery, a replacement determination step for determining whether or not the battery has been replaced. With
Until the replacement determination step determines that the battery has been replaced, the advance notification step notifies the lapse of the advance specific time.
A control method characterized in that the notification step notifies the specific state until the replacement determination step determines that the battery has been replaced. The relocation of the machine is determined based on the output information of the relocation detection means of the relocation detection system having a mounting portion on which the battery can be mounted and having the relocation detecting means capable of detecting the relocation of the machine by the electric power of the battery. Relocation judgment process and
A battery exhaustion determination step for determining the battery exhaustion of the battery mounted on the mounting portion, and
When the relocation determination step determines that the machine has been relocated, or when the battery exhaustion determination process determines that the battery has run out, a restriction step that limits the operation of the machine and
With the release step of releasing the restriction of the operation by the restriction step
In the control method of the relocation detection system equipped with
A state determination step of determining whether or not the battery mounted on the mounting portion is in a specific state in which it is time to replace the battery.
When the state determination step determines that the battery is in the specific state, the notification step for notifying the specific state of the battery and the notification step.
When the notification step notifies the specific state of the battery, the replacement determination step of determining whether or not the battery mounted on the mounting portion has been replaced.
With
The state determination step is
When the mounting time, which is the time elapsed since the battery was mounted on the mounting portion, has passed a specific time, it is determined that the battery is in the specific state.
When the mounting time has not passed the specific time, the voltage detection unit that detects the potential difference in the mounting portion detects the potential difference in the mounting portion, and the detected potential difference becomes less than a predetermined threshold value. A control method comprising determining that the battery is in the specific state .

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