JP2009151377A - Numerical control device with transfer preventing function and transfer prevention system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a numerical control device having the transfer prevention function of machinery by using a GPS technology for measuring a moving distance from a place where the machinery is installed. <P>SOLUTION: This numerical control device is configured to execute the following steps: [step A1] of detecting the location of a numerical control device 1 by a GPS; [step A2] of reading the information of the preliminarily set installation location and allowable moving distance of machinery from a storage means; [step A3] of calculating the moving distance from the detection location and the installation location searched by the GPS; [step A4] of judging whether or not the moving distance calculated in the step A3 is within the allowable moving distance read in the step S2, and moving to a step A5 when the moving distance is within the allowable moving distance, and moving to a step A6 otherwise; [step A5] of executing an operation (the analysis processing of a working program) to be normally executed by the numerical control device 1, and ending the operation: [step A6] of executing processing to stop the function of the numerical control device, and moving to a step A7; and [step A7] of setting an operation inhibition flag F to 1, and ending the operation. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a numerical control device and a relocation prevention system having a numerical control device relocation prevention function.

In order to prevent the machine tool from being transferred illegally, when the machine is moved from a proper installation location, the vibration detection sensor mounted on the machine notifies the numerical control device through the I / O device, and the machine There is known a technique for making the system unusable (see Patent Document 1).
Whether to measure the absolute position of the device with GPS, refer to map information that shows the correspondence between the absolute position of the device and the permission / denial of the function, and determine whether the function is permitted / not permitted to continue. Or the technique to stop is known (refer patent document 2).

JP 2003-35595 A Japanese Patent Laid-Open No. 11-161486

Since the technique of Patent Document 1 determines whether or not a machine tool has been moved by detecting vibrations, when it is used for the purpose of the present invention, it cannot be used even in a factory that is not illegal. There is a problem that it ends up. In addition, there is a problem of malfunction such as erroneous detection due to an earthquake or the like even without relocation, and conversely, even if relocation is not detected when vibration is small.
In addition, since the technology of Patent Document 2 has map information in which the correspondence between the absolute position and the permission / non-permission of the function is known, the map information needs to be updated for each device due to changes in the situation. There is a problem of becoming.

  In order to solve the above problems, the present invention provides a numerical control device and a machine tool controlled by the numerical control device by detecting a place where the machine is installed using GPS technology instead of vibration as a method for detecting relocation. To provide a numerical control device and a relocation prevention system having a relocation prevention function capable of reliably identifying the relocation of a machine and determining whether the function is permitted / not permitted without having map information in the numerical control device itself. With the goal.

  The invention according to claim 1 of the present application is a numerical control device installation position setting unit that sets an installation position of a numerical control device, a movement distance setting unit that sets an allowable movement distance from the installation position, and the numerical control device. Storage means for storing the installation position and the allowable movement distance, position detection means using GPS for detecting the position of the numerical control device, the position of the numerical control device detected by the position detection means, and the numerical control device A moving distance calculating means for calculating a moving distance of the numerical control device based on the setting position set by the setting position setting means, and whether the moving distance of the numerical control device exceeds an allowable moving distance set by the moving distance setting means; A movement distance determination means for determining whether or not the movement distance determination means determines that the movement distance of the numerical control device has exceeded the allowable movement distance. And means for stopping the operation of the value control unit, a numerical controller having a relocation preventing function characterized by comprising a.

  According to a second aspect of the present invention, there is provided monitoring means for monitoring whether the GPS is operating normally, and stopping the operation of the numerical controller when the monitoring means detects that the GPS is not operating normally And a numerical control device having a relocation prevention function according to claim 1.

  According to a third aspect of the present invention, there is provided an installation position setting discriminating means for discriminating whether or not an installation position of the numerical control device is set by the numerical control device installation position setting means, and an installation position is set by the installation position setting discriminating means. And a means for stopping the operation of the numerical control device when it is determined that the numerical control device has not been operated. The numerical control device having a transfer prevention function according to claim 1, It is.

  According to a fourth aspect of the present invention, there is provided the numerical control device according to the third aspect, wherein the information is received from a computer that holds regulatory area information and can determine whether the numerical control device can be operated based on the information. The computer has a function that can be exchanged, and notifies the computer of the position information of the numerical control device detected by the GPS when it is determined that the installation position is not set by the installation position setting determination means, the computer When it is determined that the operation of the numerical control device can be permitted based on the restricted area information and the position information of the numerical control device, the numerical control device is notified of information on the allowable movement distance, and the allowable movement distance Based on the information, the numerical controller stores an installation position and an allowable movement distance, and includes a numerical controller and a computer. A stop system.

  According to a fifth aspect of the present invention, in the numerical control device according to the first aspect, information is provided between the computer and the computer that holds the restricted area information and can determine whether the numerical control device can be operated based on the information. The numerical control device detects the movement and determines that the movement distance exceeds the allowable movement distance, and immediately stops the operation of the numerical control device without stopping the operation of the numerical control device. When the detected position information is notified and the computer determines that the numerical control device can be operated based on the restricted area information and the position information of the numerical control device, the numerical control device can be operated. And when the operation of the numerical control device is not received within a predetermined time after notifying the computer of the position information detected by the GPS. Relocation of the numerical control device and the computer characterized in that the numerical control device stops its operation or the numerical control device continues its operation when notified that the operation is possible Prevention system.

  The invention according to claim 6 is based on information obtained from the computer, when the computer determines that the operation of the numerical controller is possible, the installation position stored in the numerical controller and the allowable movement distance. The relocation prevention system according to claim 5, wherein the relocation prevention system is updated.

  The invention according to claim 7 is characterized in that the moving distance setting means divides the entire circumference of the installation position of the numerical control device into a plurality of fan-shaped areas and can set an allowable moving distance for each of the fan-shaped areas. A numerical control device or a relocation prevention system having a relocation prevention function according to any one of claims 1 to 6.

  According to the present invention, a numerical control device having a function of preventing movement of a machine such as a numerical control device and a machine tool controlled by the numerical control device by measuring a moving distance from a place where the numerical control device is installed using GPS technology. And a relocation prevention system can be provided.

  In the present invention, when a numerical control device and a machine tool or the like controlled by the numerical control device are relocated by transportation beyond an allowable movement distance, the relocation of the numerical control device is reliably detected and determined to be unauthorized relocation. In this case, the operation of the numerical controller can be surely prohibited.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a numerical control device and a numerical control device having a function of preventing transfer of a machine such as a machine tool (hereinafter referred to as “machine”) controlled by the numerical control device of the present invention will be described with reference to the drawings.
FIG. 1A is a schematic block diagram of a numerical control apparatus 1 having a relocation prevention function. The numerical control device 1 is installed in a customer factory recognized by a machine tool manufacturer. The numerical controller 1 includes a processor (CPU) 2, a holding RAM 3, a GPS module 4, a monitoring device 5, a FROM 6, an Ethernet (registered trademark) board 7, a display control circuit 8, an axis control circuit 9, a bus 10, and a GPS receiver. An antenna 11 is provided.

  The holding RAM 3 is a battery-backed RAM. Information on the “installation position” of the machine including the numerical control device of the present invention and the “allowable movement distance” that is the distance allowed to move from the installation position is stored. Such information is input by a person in charge of managing unauthorized transfer such as a person in charge of a machine tool manufacturer using an input means (not shown) such as MDI (manual data input) provided in the numerical control device 1. . As the input means, a memory card, a PC (personal computer), or the like that stores information on the installation position of the numerical controller 1 or information on an allowable movement distance can be used.

The GPS module 4 detects the position of the numerical controller 1 to which the GPS module 4 is fixed. The monitoring device 5 is a device that observes an output signal from the GPS module 4 and monitors whether the GPS module 4 is operating normally, that is, whether position information is normally detected and output.
When the installation position of the numerical control device 1 is difficult to receive radio waves from GPS satellites and the GPS module 4 cannot output accurate latitude and longitude data, the monitoring device 5 It is determined that the current position of the numerical controller 1 cannot be specified based on the output signal. When such a situation occurs, the machine tool manufacturer dispatches a person in charge in response to a contact from the customer. The dispatched person in charge connects the input device to the monitoring device 5 and inputs a password, and takes emergency measures so that the numerical control device 1 does not stop functioning. Then, in order to improve the GPS reception state, measures such as improving the radio wave reception environment are taken.

  The FROM 6 compares the position information detected by the GPS and the installation position stored in the holding RAM 3 to calculate the moving distance, compares the “acceptable moving distance” stored in the holding RAM 3, and performs numerical control. A program for determining whether to stop the function of the device 1 and performing processing for stopping the function is stored. Further, a program created based on a flowchart showing an algorithm described later is also stored. The stored program is executed by the processor (CPU) 2. For example, the operation of the numerical control device 1 is stopped by displaying an alarm message on the display control circuit 8 to stop the operation of the axis control circuit 9 or prohibiting the analysis processing of the machining program by the processor (CPU) 2. It is done by the method.

The Ethernet (registered trademark) board 7 is a device that allows the numerical control device 1 to connect to the Internet and communicate with a computer installed outside. The computer 13 installed outside will be described in the description of FIG.
FIG. 1B shows a machine tool side in which the GPS module 4 built in the numerical controller 1 of FIG. 1A is built in, for example, an I / O unit of a machine tool controlled by the numerical controller 1. The embodiment arrange | positioned is shown.

  FIG. 2 is a schematic block diagram of a machine relocation prevention system according to an embodiment of the present invention. The numerical control device 1 described with reference to FIG. 1 is connected to an external computer 13 such as a machine tool manufacturer 12 through an Ethernet (registered trademark) board 7 and an Internet line 15 so that information can be exchanged. The computer 13 installed in the machine tool maker 12 stores, as a database 14, regulated area information, which is area information that permits installation and operation of the numerical control device 1.

The computer 13 determines whether or not the numerical controller 1 can be operated from the position information of the numerical controller 1 received by the GPS transmitted from the numerical controller 1. Then, the determination result is returned from the computer 13 to the numerical controller 1 via the Internet line 15.
Note that the exchange of information between the numerical controller 1 and the computer 13 is not limited to a communication line such as the Internet line 15, and a system can be configured that performs offline via a medium such as a memory card.

  FIG. 3 is an example of a flowchart showing an algorithm for determining whether or not relocation is possible based on an allowable movement distance. Hereinafter, it demonstrates according to each step. The flowchart shown in FIG. 3A will be described. [Step A1] The position of the numerical controller 1 is detected by GPS. [Step A2] Information on the preset installation position of the machine and the allowable movement distance is read from the storage means. [Step A3] The movement distance of the numerical controller 1 is calculated from the position detected in Step A1 and the installation position read in Step A2. [Step A4] It is determined whether or not the movement distance obtained in Step A3 is within the allowable movement distance read in Step A2. If the movement distance is within the allowable movement distance, the process proceeds to Step A5. Move to A6. [Step A5] An operation normally performed by the numerical control device 1 (such as machining program analysis processing) is executed, and the process ends. [Step A6] A process of stopping the operation of the numerical controller 1 is executed, and the process proceeds to Step A7. [Step A7] The operation prohibition flag F is set to 1 and the process ends. The operation prohibition flag F is canceled by a special operation described later. The information of the operation prohibition flag F is stored in, for example, the holding type RAM 3 which is a nonvolatile memory so that it does not disappear even when the power of the numerical controller 1 is turned off.

  The flowchart shown in FIG. 3B is different from the flowchart shown in FIG. 3A in that it is determined whether or not position detection by GPS is possible in step B1. The reason for adding the step of determining whether or not position detection by GPS is possible is as described for the monitoring device 5 in the description of FIG. Other steps are the same as those described with reference to the flowchart of FIG.

FIG. 4 is an example of a flowchart illustrating an algorithm that includes determining whether the installation position of the machine of the present invention is set.
Hereinafter, it demonstrates according to each step. [Step C1] The current position is detected by GPS. [Step C2] Using an input means (not shown) provided in the numerical controller 1, it is determined whether or not the installation position of the numerical controller 1 is set. If the installation position of the numerical controller is set, the process proceeds to step C3, and if not set, the process proceeds to step C7. [Step C3] Information on the preset installation position of the machine and the allowable movement distance is read from the storage means. [Step C4] The movement distance of the numerical controller 1 is calculated from the position detected in Step C1 and the installation position read in Step C3. [Step C5] It is determined whether or not the movement distance obtained in Step C4 is within the allowable movement distance read in Step C3. If the movement distance is within the allowable movement distance, the process proceeds to Step C6. Move to C7. [Step C6] An operation (such as machining program analysis) normally performed by the numerical control apparatus 1 is executed, and the process ends. [Step C7] A process of stopping the operation of the numerical controller 1 is executed, and the process proceeds to Step C8. [Step C8] The operation prohibition flag F is set to 1 and the process ends. The operation prohibition flag F is canceled by a special operation described later.

  FIG. 5 is a first flowchart showing an algorithm including determining whether the installation position of the machine is set in the relocation prevention system of the present invention. Hereinafter, it demonstrates according to each step.

[Step D1] The position of the numerical controller 1 is detected by GPS. [Step D2]
It is determined whether or not the installation position of the numerical control device 1 is set using an input means (not shown) provided in the numerical control device 1. If the installation position of the numerical control device 1 is set, the process proceeds to step D3, and if not set, the process proceeds to step D7. [Step D3] Information on the preset installation position of the machine and the allowable movement distance is read from the storage means. [Step D4] The moving distance of the numerical controller 1 is calculated from the position detected by the GPS in step D1 and the installation position read in step D3. [Step D5] It is determined whether or not the movement distance obtained in Step D4 is within the allowable movement distance read in Step D3. If the movement distance is within the allowable movement distance, the process proceeds to Step D6. Migrate to [Step D6] An operation normally performed by the numerical control device 1 (such as machining program analysis processing) is executed, and the process ends. [Step D7] The computer 13 is notified of the position detection information by GPS obtained in Step D1. [Step D8] The numerical controller 1 waits for a notification from the computer 13. [Step D9] It is determined whether or not the notification from the computer 13 includes information on an allowable movement distance. If there is information on the allowable movement distance, the process proceeds to step D12. If there is no information on the allowable movement distance, the process proceeds to step D10. [Step D10] A process of stopping the operation of the numerical controller 1 is executed, and the process proceeds to Step D11. [Step D11] The operation prohibition flag F is set to 1 and the process ends. [Step D12] The numerical control apparatus 1 resets the information on the allowable movement distance received from the computer 13 and stores it in the storage device. The position information of the numerical control device 1 is set and stored as the position information detected by the GPS in step D1. Then, the process proceeds to step D3.

FIG. 6 is a second flowchart showing an algorithm for determining whether or not relocation is possible, which is executed in the machine relocation prevention system of the present invention. Hereinafter, it demonstrates according to each step.
[Step E1] The position of the numerical controller 1 is detected by GPS. [Step E2] Information on the preset installation position of the machine and the allowable movement distance is read from the storage means. [Step E3] The moving distance of the numerical controller 1 is calculated from the position detected by the GPS in step E1 and the installation position read in step E2. [Step E4] It is determined whether or not the movement distance obtained in Step E3 is within the allowable movement distance read in Step E2. If the movement distance is within the allowable movement distance, the process proceeds to Step E5. Migrate to [Step E5] The operation normally executed by the numerical control device 1 (such as machining program analysis processing) is executed, and the process ends. [Step E6] The computer 13 is notified of the position detection information by GPS obtained in Step E1. [Step E7] The numerical controller 1 waits for a notification from the computer 13. [Step E8] It is determined whether there is information that can be moved within a predetermined time from the computer 13. If there is information that can be moved, the process proceeds to step E5, and if there is no information that can be moved, the process proceeds to step E9. [Step E9] The operation of the numerical controller 1 is stopped, and the process proceeds to Step E10. [Step E10] The operation inhibition flag F is set to 1 and the process ends.

  FIG. 7 is a third flowchart showing an algorithm for determining whether or not relocation is possible, which is executed in the machine relocation prevention system of the present invention. The flowchart of the algorithm shown in FIG. 7 is the flowchart of the algorithm shown in FIG. 6, and includes the step of rewriting the information on the installation position and the allowable movement distance stored in the numerical control device 1 with the information acquired from the computer. It is added. Hereinafter, it demonstrates according to each step.

  [Step F1] The position of the numerical controller 1 is detected by GPS. [Step F2] Information on the preset installation position of the machine and the allowable movement distance is read from the storage means. [Step F3] The moving distance of the numerical controller 1 is calculated from the position detected by GPS in Step F1 and the installation position read in Step F2. [Step F4] It is determined whether or not the movement distance obtained in Step F3 is within the allowable movement distance read in Step F2. If the movement distance is within the allowable movement distance, the process proceeds to Step F5. Migrate to [Step F5] The operation normally executed by the numerical control apparatus 1 (such as machining program analysis) is executed, and the process ends. [Step F6] The computer 13 is notified of the GPS position detection information obtained in Step F1. [Step F7] The numerical controller 1 waits for a notification from the computer 13. [Step F8] It is determined whether there is information that can be moved from the computer 13 within a predetermined time. If there is information that can be moved, the process proceeds to step F9, and if there is no information that can be moved, the process proceeds to step F10. [Step F9] Based on the information on the installation position and the information on the allowable movement distance notified from the computer 13, the information on the installation position of the numerical control device 1 and the information on the allowable movement distance are reset. . Then, the process proceeds to step F5. [Step F10] A process of stopping the function of the numerical control apparatus 1 is executed, and the process proceeds to Step F11. [Step F11] The operation prohibition flag F is set to 1 and the process ends.

  The operation of the numerical control device is prohibited in the flowchart of each algorithm. In order to prohibit the operation, the operation of the axis control circuit 9 is prohibited, and the analysis processing of the machining program in the processor (CPU) 2 is prohibited. To. In addition, in the flowchart of each algorithm, when processing for setting the operation prohibition flag F to 1 is performed, the person in charge of the machine tool manufacturer inputs the password to cancel the operation prohibition of the numerical control device. . The operation prohibition flag F is a flag for storing the operation prohibition state of the machine tool in order to prohibit the operation when the power is turned on in a state where the operation of the machine tool is already prohibited. Initially it is set to 0 and is in a state where operation is not prohibited. By using the operation prohibition flag F, a person in charge of a machine tool maker can confirm when the numerical control apparatus is moved from the allowable movement distance to the outside and operated. . Therefore, management for the numerical control device can be reliably executed.

  FIG. 8 is an example of a flowchart showing an algorithm for canceling the prohibition of operation. The person in charge of the machine tool manufacturer goes to the place where the numerical control device 1 is installed in response to a request from the customer of the numerical control device 1, and cancels the operation prohibition according to the steps described below. [Step G1] The power-on button operation of the numerical controller 1 is detected. [Step G2] The power is turned on. At this time, it is not necessary to activate the entire system of the numerical control apparatus 1, and it is only necessary to activate a functional element for releasing the operation prohibition state. [Step G3] A password input is requested. [Step G4] When a password is entered, the process proceeds to step G5. [Step G5] The operation prohibition is canceled (the operation prohibition flag F is returned to 0 (zero)), and the process ends.

FIG. 9 shows an example in which the allowable movement area allowable for the machine is divided into a plurality of fan-shaped areas, and allowable movement distances are set for the respective fan-shaped areas. Since the position detection information by GPS and the installation position information of the numerical controller have information on latitude and longitude, it is possible to specify the moving direction of the numerical controller. In each of the flowcharts, by adding a process for calculating the moving direction as well as calculating the moving distance, it is possible to specify in which sector area the numerical control device 1 after moving exists.
As described above, by setting the movable areas in the plurality of fan-shaped areas, it is possible to easily set the allowable movement distance in the place where the movement prohibited area is adjacent.

It is a schematic block diagram of one Embodiment of the numerical control apparatus which has the transfer prevention function of the machine of this invention. 1 is a schematic block diagram of an embodiment of a machine relocation prevention system of the present invention. It is an example of the flowchart which shows the algorithm which judges the propriety of transfer based on the allowable moving distance of this invention. It is an example of the flowchart which shows the algorithm of judging whether the installation position of the machine of this invention was set. It is an example of the 1st flowchart which shows the algorithm which determines the propriety of the transfer performed in the transfer prevention system of a machine of this invention. It is an example of the 2nd flowchart which shows the algorithm which judges the propriety of the relocation | permission performed in the relocation prevention system of a machine of this invention. It is an example of the 3rd flowchart which shows the algorithm which judges the propriety of the relocation | permission performed in the relocation prevention system of the machine of this invention. It is an example of the flowchart which shows the algorithm for canceling operation prohibition. This is an example in which the allowable movement area of the machine is divided into a plurality of sector areas, and an allowable movement distance is set for each of the sector areas.

Explanation of symbols

1 Numerical control device 2 Processor (CPU)
3 Retainable RAM
4 GPS module 5 Monitoring device 6 FROM
7 Ethernet (Registered Trademark) Board 8 Display Control Circuit 9 Axis Control Circuit 10 Bus 11 GPS Reception Antenna 12 Machine Tool Manufacturer 13 Computer 14 Database 15 Internet Line

Claims (7)

Numerical control device installation position setting means for setting the installation position of the numerical control device;
A movement distance setting means for setting an allowable movement distance from the installation position;
Storage means for storing the installation position of the numerical control device and the allowable movement distance;
Position detecting means using GPS for detecting the position of the numerical control device;
A moving distance calculating means for calculating a moving distance of the numerical controller based on the position of the numerical controller detected by the position detector and the installation position set by the numerical controller installation position setting means;
A moving distance determining means for determining whether or not the moving distance of the numerical controller exceeds an allowable moving distance set by the moving distance setting means;
Means for stopping the operation of the numerical control device when the movement distance determination means determines that the movement distance of the numerical control device exceeds the allowable movement distance;
A numerical control device having a relocation prevention function characterized by comprising: Monitoring means for monitoring whether the GPS is operating normally;
Means for stopping the operation of the numerical control device when the monitoring means detects that the GPS is not operating normally;
The numerical control device having a relocation prevention function according to claim 1, comprising: An installation position setting determining means for determining whether or not an installation position of the numerical controller is set by the numerical controller installation position setting means;
Means for stopping the operation of the numerical control device when it is determined that the installation position is not set by the installation position setting determination means;
A numerical control apparatus having a relocation prevention function according to claim 1, wherein the numerical control apparatus has a relocation prevention function. In the numerical control device according to claim 3,
It has a function to exchange information with a computer that has regulatory area information and can determine whether the numerical control device can be operated based on the information.
When the installation position setting determining means determines that the installation position is not set, the computer is notified of the position information of the numerical controller detected by the GPS,
When the computer determines that the operation of the numerical control device can be permitted based on the restricted area information and the position information of the numerical control device, the computer notifies the numerical control device of information on an allowable movement distance;
A relocation prevention system comprising a numerical control device and a computer, wherein the numerical control device stores an installation position and an allowable movement distance based on information on the allowable movement distance. The numerical control apparatus according to claim 1,
It has a function to exchange information with a computer that has regulatory area information and can determine whether the numerical control device can be operated based on the information.
When the numerical control device detects movement and determines that the movement distance exceeds the allowable movement distance, the computer immediately notifies the computer of the position information detected by the GPS without stopping the operation of the numerical control device. When the computer determines that the numerical control device can be operated based on the regulated area information and the position information of the numerical control device, it notifies the numerical control device that the operation is possible,
If the numerical control device does not receive a notification that the operation is allowed within a predetermined time after notifying the computer of the position information detected by the GPS, the numerical control device stops its operation or the operation is allowed. When the notification is received, the numerical control device continues its operation, and a relocation prevention system comprising a numerical control device and a computer.   When the operation of the numerical control device is determined to be possible by the computer, the installation position and the allowable movement distance stored in the numerical control device are updated based on information acquired from the computer. Item 6. The relocation prevention system according to Item 5.   The moving distance setting means divides the entire circumference of the installation position of the numerical control device into a plurality of fan-shaped areas, and allows an allowable moving distance to be set for each of the fan-shaped areas. A numerical control device or a migration prevention system having the migration prevention function described in any one of the above.

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