JP2011191984A - Relocation detection system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a relocation detection system that can manage a plurality of machines collectively. <P>SOLUTION: In the relocation detection system 200, once registered in a relocation detector 20, a unique ID of a numerical control device 1A can also be stored in other relocation detectors 30 and 40 connected to the relocation detector 20. If the unique ID of the numerical control device 1A does not match any unique ID registered in the relocation detectors 20-40 at a start of the numerical control device 1A, the numerical control device 1A is not started. This can prevent the use of numerical control devices unauthorizedly connected to the relocation detectors and can manage a plurality of numerical control devices, collectively. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a relocation detection system.

  Conventionally, as a technology for monitoring the relocation of equipment, by detecting and storing the vibration applied to the device during the power-off period of the equipment, it is determined whether or not there is a vibration history after the power is turned on again. There is known a relocation detection device that prohibits activation of the device. For example, the inclination detecting means of the numerical control device, the relocation determining means for determining that the numerical control device has been relocated when the inclination detecting means detects an inclination greater than a preset reference value, and the numerical control when determining that the relocation has been relocated. A numerical control device having a relocation detection function including use prohibiting means for prohibiting use of the device is disclosed (for example, see Patent Document 1).

JP 2009-134561 A

  However, the numerical control device described in Patent Document 1 has only a function of detecting only its own relocation. Therefore, when a plurality of numerical control devices are installed in the floor of a factory, there is a problem that all numerical control devices must be provided with a transfer detection function, which increases costs.

  The present invention has been made to solve the above problems, and an object thereof is to provide a relocation detection system capable of managing a plurality of machines collectively.

  The relocation detection system according to the first aspect of the present invention includes relocation detection means for detecting relocation, a machine connected to the relocation detection means, and operation of the machine is prohibited when the relocation detection means detects relocation. In the relocation detecting device comprising the operation prohibiting means, the machine includes a mechanical storage means for storing individual identification information, and the relocation detecting means is connected to the machine and other relocation detecting means. An output unit, the machine connected to the input / output unit, an identification information acquisition unit for acquiring the identification information of a machine connected to the other moving detection unit, and the identification information acquired by the identification information acquisition unit Identification information storage means for storing the identification information, and the identification information coincidence judgment for judging whether or not the identification information stored in the machine storage means and the identification information stored in the identification information storage means match. Means, only when the identification information by the identification information match determination unit is determined to coincide with each other, characterized in that a running permission means for permitting the operation to the machine.

  In the first aspect, the machine and other transfer detection means can be connected to the input / output unit of the transfer detection means. The identification information acquisition unit acquires the identification information of the machine connected to the input / output unit and the identification information of the machine connected to the other moving detection unit. The identification information acquired by the identification information acquisition unit is stored in the identification information storage unit. The identification information coincidence determining means determines whether or not the identification information stored in the machine storage means matches the identification information stored in the identification information storage means. The operation permission means permits the machine to operate only when it is determined that the identification information matches each other. Machines whose identification information does not match each other may be a machine that illegally communicates with the relocation detection means, so that the operation of such machines can be prohibited. Since the identification information of the machines connected to other relocation detection means can be stored in the identification information storage means, a plurality of machines can be managed together. Even if the operator changes the arrangement of the machine and connects the machine to the input / output unit of another moving detection means, the identification information matches. Therefore, the troublesome work of storing the identification information again becomes unnecessary.

  In the first aspect, the relocation detecting means includes a converter that converts an AC power source into a DC power source, and the converter converts the AC power source independent of the power source of the machine into a DC power source to convert the relocation source. You may make it drive a detection means. The converter converts an AC power source independent of the power source of the machine into a DC power source and drives the moving detection means. Therefore, power can be supplied to the moving detection means even when the power of the machine is off. The transfer detection means can be provided away from the machine.

  In the first aspect, the relocation detecting means supplies an abnormality detecting means for detecting abnormality of the converter, and supplies power of the machine to the relocation detecting means when the abnormality detecting means detects the abnormality. You may provide a power supply means and the alerting | reporting means which alert | reports abnormality to the said machine, when the said abnormality detection means detects the said abnormality. The power supply means supplies the machine power to the relocation detection means when the abnormality detection means detects an abnormality. Therefore, the relocation detection means can use the power source of the machine even if the converter is abnormal. When there is an abnormality in the converter, the abnormality notifying means notifies the machine of the abnormality, so that the operator can recognize that the converter has an abnormality on the machine side.

  In the first aspect, the relocation detection means includes an auxiliary battery that backs up the relocation detection means, an abnormality detection means that detects an abnormality of the converter, and the abnormality detection means that detects the abnormality. And a switching means for switching so that the power of the auxiliary battery is supplied to the relocation detecting means from the DC power source converted by the converter. When the abnormality detection means detects an abnormality, the switching means switches so that the power of the auxiliary battery is supplied to the relocation detection means from the DC power converted by the converter. Therefore, the relocation detection means can use the power supply of the auxiliary battery even when the AC power supply cannot be used, such as when the AC power supply is broken or the converter is broken.

  Further, in the first aspect, the relocation detecting means detects the absence of power supply by the auxiliary battery supply detecting means for detecting whether or not the auxiliary battery is supplied with power, and the identification information when the auxiliary battery supply detecting means detects no power supply. Delete means for deleting the identification information stored in the storage means may be provided. The auxiliary battery supply means detects whether or not the auxiliary battery is supplied with power. When the auxiliary battery supply detecting unit detects that there is no power supply, the deleting unit deletes the identification information stored in the identification information storage unit. Therefore, the identification information coincidence determination unit cannot determine the coincidence with the identification information stored in the identification information storage unit, so that the operation permission unit does not permit the machine to operate. Therefore, the relocation detection device can prohibit the operation of the machine when the auxiliary battery is not supplied with power.

1 is a conceptual diagram showing a configuration of a relocation detection system 200. FIG. It is a block diagram which shows the connection form of the moving detection system. It is a block diagram which shows the electrical structure of 1 A of numerical control apparatuses, and the moving detection apparatus. It is a figure which shows the mechanism of switching of the power supply in the transfer detection apparatus. 3 is a conceptual diagram showing various storage areas of a flash memory 24. FIG. It is a figure which shows the memory content of unique ID storage area 241A. It is a figure which shows the memory content of the unique ID storage area 241B. It is a figure which shows the memory content of the unique ID storage area 241C. 2 is a block diagram showing a configuration of a communication distance measurement circuit 11. FIG. It is a flowchart of a unique ID registration request process. It is a flowchart of a unique ID registration process. It is a flowchart of a relocation detection process. It is a flowchart of a starting determination process. It is a flowchart of a unique ID transmission process. It is a flowchart of a power supply switching process. It is a flowchart of a battery exhaustion detection process. It is a timing chart which showed the measuring method of propagation time. It is a figure which shows the mechanism of switching of the power supply in the moving detection apparatus 220. FIG.

  Hereinafter, a relocation detection system 200 according to an embodiment of the present invention will be described with reference to the drawings. These drawings are used to explain technical features that can be adopted by the present invention. Unless otherwise specified, the configuration of the apparatus and the flowcharts of various processes are described in the drawings. It is not an intent to limit to only, but merely an illustrative example.

  The configuration of the relocation detection system 200 will be described with reference to FIG. The relocation detection system 200 includes a relocation detection device 20 that manages a first group that includes three numerical control devices 1A, 1B, and 1C, and a relocation detection that manages a second group that includes three numerical control devices 2A, 2B, and 2C. A device 30 and a relocation detection device 40 for managing a third group including three numerical control devices 3A, 3B, 3C are provided. The numerical control devices 1A to 1C, 2A to 2C, and 3A to 3C each control the operation of each machine tool (not shown in FIG. 1) by executing the NC program.

  As shown in FIGS. 1 and 2, each of the interface modules 12 (hereinafter referred to as I / F modules 12) of the numerical control devices 1 </ b> A to 1 </ b> C is transferred to the transfer detection interface 33 (hereinafter referred to as transfer). This is connected to the detection I / F 33 via wirings 1a to 1c. A machine frame (not shown) for housing the transfer detection device 20 is fixed to a pillar 91 standing on the floor surface of the factory. Each I / F module 52 of the numerical control devices 2A to 2C is connected to the relocation detection I / F 55 of the relocation detection device 30 via wires 2a to 2c. A machine frame (not shown) for housing the transfer detection device 30 is fixed to a pillar 92 standing on the floor surface of the factory. Each I / F module 62 of the numerical control devices 3A to 3C is connected to the relocation detection I / F 77 of the relocation detection device 40 via wirings 3a to 3c. A machine frame (not shown) for housing the transfer detection device 40 is fixed to a pillar 93 standing on the floor surface of the factory. The relocation detection device 20 and the relocation detection device 30 are connected to a relocation detection I / F 33 and a relocation detection I / F 55 via a wiring 18. The relocation detection device 30 and the relocation detection device 40 are connected to a relocation detection I / F 55 and a relocation detection I / F 77 via a wiring 19.

  As shown in FIG. 2, the relocation detection device 20 can communicate with the numerical control devices 1 </ b> A to 1 </ b> C and the relocation detection device 30. The relocation detection device 30 can communicate with the numerical control devices 2A to 2C, the relocation detection device 20, and the relocation detection device 40. The relocation detection device 40 can communicate with the numerical control devices 3 </ b> A to 3 </ b> C and the relocation detection device 30.

  As shown in FIG. 2, each relocation detection I / F 33, 55, 77 of the relocation detection device includes an A terminal for connecting a numerical control device, a B terminal for connection to another relocation detection device, and a C terminal. ing. Four numerical control devices can be connected to the A terminal. A terminal of the relocation detection I / F 33 of the relocation detection device 20 is connected to the numerical control devices 1A, 1B, and 1C. Nothing is connected to the B terminal. The C terminal is connected to the relocation detection device 30. A terminal of the relocation detection I / F 55 of the relocation detection device 30 is connected to the numerical control devices 2A, 2B, and 2C. The B terminal is connected to the relocation detection device 20. The C terminal is connected to the relocation detection device 40. Numerical control devices 3A, 3B, and 3C are connected to the A terminal of the relocation detection I / F 77 of the relocation detection device 40. The B terminal is connected to the relocation detection device 30. Nothing is connected to the C terminal.

  As shown in FIG. 1, the numerical control devices 1 </ b> A to 1 </ b> C operate normally as long as they are within the reach of the wirings 1 a to 1 c, and can move within the floor. Since the numerical control devices 2A to 2C operate normally as long as they are within the reach of the wirings 2a to 2c, they can move within the floor. Since the numerical control devices 3A to 3C start normally if they are within the reach of the wirings 3a to 3c, they can move within the floor. Further, for example, even when the numerical control device 1A as the first group is removed from the relocation detection device 20 and connected to the relocation detection devices 30 and 40, the numerical control device 1A starts normally. Therefore, the worker can change the arrangement of the numerical control devices 1A to 1C, 2A to 2C, and 3A to 3C on the same floor.

  Next, the electrical configuration of the numerical control apparatus 1A will be described with reference to FIG. Since the electrical configurations of the numerical control devices 1B, 1C, 2A to 2C, and 3A to 3C are the same as those of the numerical control device 1A, description thereof is omitted. The numerical controller 1A includes at least a CPU 5, a ROM 6, a RAM 7, a flash memory 8, an input / output interface 9, an AC / DC converter 10, a communication distance measuring circuit 11, an I / F module 12, and the like.

  In addition to the main program, the ROM 6 stores a unique ID registration request program, an activation determination program, and the like which will be described later. The unique ID registration request program and the activation determination program may be stored in a flash memory, EEPROM, HDD, or the like as a computer-readable storage medium. The flash memory 8 stores at least a unique ID that is unique identification information of the numerical control device 1A and a reference communication distance that is a reference of a communication distance between the relocation detection device 20 and the numerical control device 1A. As will be described later, the reference communication distance is calculated by the CPU 5 when the relocation detection system 200 is installed.

  The input / output interface 9 is connected to a drive unit (not shown) and an operation panel (not shown) of the machine tool 15. The AC / DC converter 10 is connected to an external AC power supply 16 and converts AC supplied from the AC power supply 16 into DC. The AC / DC converter 10 is connected to the relocation detection I / F 33 of the relocation detection device 20 in addition to the AC power supply 16. The communication distance measurement circuit 11 measures the communication distance between the numerical control device 1A and the relocation detection device 20. The I / F module 12 is connected to the relocation detection I / F 33 of the relocation detection device 20.

  Next, the electrical configuration of the relocation detection device 20 will be described with reference to FIG. Since the electrical configuration of the relocation detection devices 30 and 40 is the same as that of the relocation detection device 20, description thereof will be omitted. The relocation detection device 20 includes a CPU 21, ROM 22, RAM 23, flash memory 24, relocation detector 25, abnormal voltage detection circuit 26, switch drive circuit 27, battery 28 as an auxiliary battery, signal return circuit 29, and AC / DC converter 32. The relocation detection I / F 33 is provided at least. The ROM 22 stores at least a unique ID registration program, a relocation detection program, a unique ID transmission program, a power supply switching program, a battery exhaustion detection program, and the like which will be described later. The unique ID registration program, relocation detection program, unique ID transmission program, power switch program, and battery exhaustion detection program may be stored in a flash memory, EEPROM, HDD, or the like as a computer-readable storage medium.

  The relocation detector 25 detects the relocation of the relocation detection device 20 by detecting the vibration of the machine body. As a method for detecting relocation, for example, acceleration, inclination, etc. may be detected in addition to vibration. The abnormal voltage detection circuit 26 detects an abnormality in the output of the AC / DC converter 32. The switch drive circuit 27 opens and closes switches 41 to 43 (see FIG. 4) described later according to the detection result of the abnormal voltage detection circuit 26. For example, when the distance measurement signal output from the numerical controller 1A is received, the signal return circuit 29 returns the distance measurement signal to the numerical controller 1A. The AC / DC converter 32 is connected to an external AC power supply 35 and converts the AC supplied from the AC power supply 35 into a DC. The relocation detection I / F 33 is connected to the I / F module 12 of the numerical controller 1A and the AC / DC converter 10 of the numerical controller 1A. Therefore, the relocation detection device 20 can communicate with the numerical control device 1A. The same applies to the numerical controllers 1B and 1C.

  Next, the power supply path of the relocation detection device 20 will be described with reference to FIG. Since the power supply path of the relocation detection devices 30 and 40 is the same as that of the relocation detection device 20, the description thereof will be omitted. A switch 41 is provided in the middle of the power supply line connecting the CPU 21 and the AC / DC converter 32. A switch 42 is provided in the middle of the power supply line connecting the CPU 21 and the relocation detection I / F 33. A switch 43 is provided in the middle of the power supply line connecting the CPU 21 and the battery 28. The switch drive circuit 27 opens and closes the switches 41, 42, and 43 based on instructions from the CPU 21. When the switch 41 is closed, the relocation detection device 20 can use the direct current output from the AC / DC converter 32. When the switch 42 is closed, the relocation detection device 20 can use the direct current output from the AC / DC converter 10 of the numerical control device 1A via the relocation detection I / F 33. When the switch 43 is closed, the relocation detection device 20 can use the direct current output from the battery 28. The CPU 21 controls switching of the switches 41 to 43 based on the detection result of the abnormal voltage detection circuit 26.

  Next, various storage areas of the flash memory 24 will be described with reference to FIG. The flash memory 24 includes at least a unique ID storage area 241A, a transfer history storage area 242, and a transfer non-detection flag storage area 243. The unique ID storage area 241A includes the unique IDs of the numerical control devices 1A to 1C connected to the relocation detection I / F 33, the unique IDs of the numerical control devices 2A to 2C connected to the relocation detection device 30, and the relocation detection device 40. The unique IDs of the numerical control devices 3A to 3C connected to are stored. The relocation history storage area 242 stores relocation detection information such as the date and time when relocation of the relocation detector 25 is detected. The operator can display the relocation detection information on a screen provided on the operation panel of the machine tool 15 by operating the operation panel. The relocation non-detection flag storage area 243 stores a relocation non-detection flag indicating the presence or absence of relocation detection of the relocation detector 25. When the relocation detector 25 has not detected relocation, the CPU 21 stores a relocation non-detection flag = “1” in the relocation non-detection flag storage area 243 (see FIG. 5). When the relocation is detected, the CPU 21 stores a relocation non-detection flag = “0” in the relocation non-detection flag storage area 243.

  Next, the unique ID stored in the unique ID storage area 241A of the flash memory 24 of the relocation detection device 20 will be described with reference to FIG. The manufacturer registers the unique IDs of the numerical control devices 1A to 1C in the relocation detection device 20 from the operation panel of the numerical control devices 1A to 1C when installing the numerical control devices 1A to 1C on the floor of the factory. In the unique ID storage area 241A, an A address starting with “A”, a B address starting with “B”, and a C address starting with “C” are registered in order from the top. The A address is assigned to the numerical controller connected to the A terminal. The B address is assigned to a numerical controller that is indirectly connected to the B terminal. The C address is assigned to a numerical controller that is indirectly connected to the C terminal.

  A unique ID of each of the numerical control devices 1A to 1C is stored in the A address. The fourth A address does not store a unique ID and is in an empty state. The unique address is not stored in the B address and is in an empty state. In the C address, the unique IDs of the numerical control devices 2A to 2C connected to the relocation detection device 30 and the unique IDs of the numerical control devices 3A to 3C connected to the relocation detection device 40 are stored in order from the top. Has been. Some C addresses have a free state in which no unique ID is stored. When the relocation detection system 200 is installed, the unique ID storage area 241A stores all the unique IDs of the numerical control devices 1A to 3A, 2A to 2C, and 3A to 3C constituting the relocation detection system 200.

  Next, the unique ID stored in the unique ID storage area 241B of the flash memory 24 of the relocation detection device 30 will be described with reference to FIG. In the unique ID storage area 241B, an A address starting with “A”, a B address starting with “B”, and a C address starting with “C” are registered in order from the top.

  A unique ID of each of the numerical control devices 2A to 2C is stored in the A address. The fourth A address does not store a unique ID and is in an empty state. The unique IDs of the numerical control devices 1A to 1C connected to the relocation detection device 20 are stored in the B address. The fourth B address does not store a unique ID, and is in an empty state. In the C address, the unique IDs of the numerical control devices 3A to 3C connected to the relocation detection device 40 are stored. The fourth C address does not store a unique ID and is in an empty state. Also in the unique ID storage area 241B, all the unique IDs of the numerical control devices 1A to 3A, 2A to 2C, and 3A to 3C constituting the relocation detection system 200 are stored.

  Next, the unique ID stored in the unique ID storage area 241C of the flash memory 24 of the relocation detection device 40 will be described with reference to FIG. In the unique ID storage area 241C, an A address starting with “A”, a B address starting with “B”, and a C address starting with “C” are registered in order from the top.

  A unique ID of each of the numerical control devices 3A to 3C is stored in the A address. The fourth A address does not store a unique ID and is in an empty state. In the B address, the unique IDs of the numerical control devices 1A to 1C connected to the relocation detection device 20 and the unique IDs of the numerical control devices 2A to 2C connected to the relocation detection device 30 are stored in order from the top. Has been. The unique address is not stored in the C address and is in an empty state. Also in the unique ID storage area 241C, all the unique IDs of the numerical control devices 1A to 3A, 2A to 2C, and 3A to 3C constituting the relocation detection system 200 are stored.

  Next, the communication distance measuring circuit 11 of the numerical controller 1A will be described with reference to FIG. The communication distance measurement circuit 11 includes a comparator 45 and an FPGA 56 that is an integrated circuit. The FPGA 56 includes a time measurement circuit 57 and a communication distance calculation circuit 58. The input terminal 1 (“input 1” in FIG. 9) and the input terminal 2 (“input 2” in FIG. 9) of the comparator 45 are connected to the I / F module 12. A distance measurement signal output from the time measurement circuit 57 is input to the input terminal 1. A distance measurement signal returned by the signal return circuit 29 of the relocation detection device 20 is input to the input terminal 2.

  The output terminal of the comparator 45 is connected to the time measurement circuit 57 of the FPGA 56. The output terminal outputs a difference between the voltage input to the input terminal 1 and the voltage input to the input terminal 2. The time measurement circuit 57 is connected to the communication distance calculation circuit 58 in the middle of the path connecting the input terminal 1 of the comparator 45 and the I / F module 12. A resistor 46 is provided in a path connecting the input terminal 1 of the comparator 45 and the I / F module 12. A resistor 47 is provided in a path connecting the input terminal 2 of the comparator 45 and the I / F module 12.

  Next, the activation restriction of the numerical control devices 1A to 1C in the relocation detection system 200 will be described with reference to the flowcharts of FIGS. In this system, in addition to the case where the relocation detector 25 detects relocation, when the unique ID of the numerical control device is not registered in the relocation detection device 20, activation of the numerical control devices 1A to 1C is prohibited. In the following description, the processing executed by the CPU 5 of the numerical control device 1A and the processing executed by the CPU 21 of the relocation detection device 20 will be described along the operation flow of this system.

<When installing a numerical controller>
The manufacturer of this system performs the operation of registering the unique ID of the numerical control device 1A in the relocation detection device 20 on the operation panel of the machine tool 15 when installing the machine tool equipped with the numerical control device 1A in the factory. The manufacturer registers a unique ID by inputting a write command (password). The write command is known only by the manufacturer. The input operation of the operation panel is input to the numerical controller 1A. This process is executed by calling the unique ID registration request program stored in the ROM 6 when transmitting the unique ID of the numerical controller 1A.

  The unique ID registration request process executed by the CPU 5 of the numerical controller 1A will be described with reference to the flowchart of FIG. When the manufacturer performs a registration operation of the unique ID on the operation panel, the unique ID write command and the unique ID stored in the flash memory 8 (see FIG. 3) are transmitted to the relocation detection device 20 (S1). The relocation detection device 20 that has received the write command and the unique ID stores the received unique ID and returns an OK signal to the numerical control device 1A if the write command is correct. If the write command is not correct, an NG signal is returned.

  Next, it is determined whether an OK signal is received from the relocation detection device 20 (S2). When an OK signal is not received (S2: NO), it is determined whether an NG signal is received (S6). If an NG signal is received (S6: YES), the process is terminated as it is. Until an OK signal or NG signal is received (S2: NO, S6: NO), the process returns to S2 and enters a standby state.

  When the OK signal is received (S2: YES), the unique ID is normally registered in the relocation detection device 20. Next, in order to measure the communication distance between the numerical controller 1 </ b> A and the relocation detection device 20, in the communication distance measurement circuit 11 shown in FIG. 9, a distance measurement signal is sent from the time measurement circuit 57 to the relocation detection device 20. Is transmitted (S3). Simultaneously with the transmission of the distance measurement signal, time measurement is started.

  As shown in FIG. 9, when a distance measurement signal is transmitted from the time measurement circuit 57, a predetermined voltage signal is input to the input terminal 1 of the comparator 45 at the same time. The distance measurement signal reaches the signal return circuit 29 via the I / F module 12 and the relocation detection I / F 33 of the relocation detection device 20. The signal return circuit 29 returns a distance measurement signal to the numerical controller 1A.

  Next, as shown in FIG. 10, it is determined whether or not a distance measurement signal has been received (S4). As shown in FIG. 18, the output of the comparator 45 until the distance measurement signal is transmitted and returned is the voltage input at the input terminal 1. Until the distance measurement signal is received (S4: NO), the process returns to S4 and enters a standby state. The distance measurement signal is input to the input terminal 2 of the comparator 45 via the I / F module 12 of the numerical controller 1A. When the distance measurement signal is input to the input terminal 2, the comparator 45 subtracts the voltage input to the input terminal 2 from the voltage input to the input terminal 1. The output of the comparator 45 becomes zero. The time when the output of the comparator 45 is a predetermined value is counted by the time measurement clock. Therefore, the CPU 21 can calculate the propagation time of the distance measurement signal.

Next, returning to the flow of FIG. 10, since the distance measurement signal has been received (S4: YES), the communication distance between the numerical control device 1A and the relocation detection device 20 is calculated based on the calculated propagation time. The calculated communication distance is stored in the flash memory 8 (see FIG. 2) as a reference communication distance (S5). For example, when the wirings 1a to 1c are coaxial cables and the propagation speed is 180 (mm / ns), the communication distance is calculated by the following equation.
・ Communication distance L = 180 (mm) × [propagation time (ns) / 2]
When the propagation time is 1000 ns, the length of the coaxial cable is L = 180 × (1000/2) = 90 (m). This value is the reference communication distance. The relocation detection system 200 can determine that there is an abnormality when the length of the wiring changes by using the length of the wiring when the numerical control apparatus 1A is installed as a reference.

  Next, the unique ID registration process executed by the CPU 21 of the relocation detection device 20 will be described with reference to the flowchart of FIG. This process is executed by calling the unique ID registration program stored in the ROM 22 when the relocation detection device 20 is installed and the power is turned on. It is determined whether or not a write command and a unique ID are received from the numerical controller 1A (or 1B, 1C) (S11). Until a write command and a unique ID are received (S11: NO), a standby state is entered. When the writing command and the unique ID are received (S11: YES), it is determined whether there is another adjacent moving detection device (S12).

  For example, since another relocation detection device 30 is connected to the relocation detection device 20 (S12: YES), the write command received from the numerical control device 1A and the unique ID are sent to the relocation detection device 30. It is transmitted (S13). The relocation detecting device 30 that has received the write command and the unique ID stores the received unique ID in the unique ID storage area 241B (see FIG. 7) of the flash memory 24 if the write command is correct. Further, “1” is stored in the relocation non-detection flag storage area 243 of the flash memory 24. When the unique ID is normally stored, an OK signal is transmitted from the relocation detection device 30 to the relocation detection device 20. If the write command is incorrect, the unique ID is not stored, and the NG signal is transmitted to the relocation detection device 20 without being stored in the relocation undetected flag storage area 243 of the flash memory 24.

  As will be described later, in addition to the relocation detection device 20, a relocation detection device 40 is connected to the relocation detection device 30. In the unique ID registration process executed by the CPU of the relocation detection device 30, the write start command received from the relocation detection device 20 and the unique ID are transmitted to the relocation detection device 40. Similarly, in the relocation detection device 40, if the write command is correct, the received unique ID is stored in the unique ID storage area 241C (see FIG. 8) of the flash memory 24, respectively. When the unique ID is normally stored, an OK signal is transmitted from the relocation detection device 40 to the relocation detection device 20 via the relocation detection device 30. If the write command is incorrect, the unique ID is not stored and an NG signal is transmitted to the relocation detection device 20.

  Next, it is determined whether or not an OK signal and an NG signal have been received from other relocation detection devices 30 and 40 (S14). Until the OK signal and the NG signal are received, the process returns to S14 and is repeated. When the OK signal and the NG signal are received (S14: YES), it is subsequently determined whether or not the write command received from the numerical controller 1A is correct (S15). If no other relocation detection device is connected (S12: NO), it is determined whether or not the write command is correct (S15). If the write command is correct (S15: YES), the received unique ID is stored in the unique ID storage area 241A (see FIG. 6) of the flash memory 24 (S16). Further, “1” is stored in the relocation non-detection flag storage area 243 of the flash memory 24 (S17). That is, the relocation non-detection flag can be turned on only when the write command is correct. Therefore, when relocation is detected and the relocation non-detection flag is “0”, only the manufacturer who knows the correct write command can set “1”. As will be described later, the unique ID cannot be stored when the relocation non-detection flag is “0”, but the unique ID can be stored again by inputting a correct write command.

  Further, it is determined whether there is another relocation detection device (S18). As described above, since the relocation detection devices 30 and 40 are connected to the relocation detection device 20 (S18: YES), the OK signal and the OK signal or NG signal received from the relocation detection devices 30 and 40, respectively. Is transmitted to the numerical controller 1A that has transmitted the write command (S19). If there is no other relocation detection device (S18: NO), an OK signal is transmitted to the numerical control device 1A (S25).

  Next, it is determined whether or not a distance measurement signal is received from the numerical controller 1A (S20). Until the distance measurement signal is received (S20: NO), the process returns to S20 and enters a standby state. When the distance measurement signal is received (S20: YES), as described above, the distance measurement signal is returned from the signal return circuit 29 to the numerical controller (S21), and the process is terminated.

  On the other hand, when the write command received from the numerical control device 1A is not correct (S15: NO), it is determined whether there is another relocation detection device (S22). As described above, since the relocation detection devices 30 and 40 are directly or indirectly connected to the relocation detection device 20 (S22: YES), subsequently, a signal returned from the relocation detection devices 30 and 40. It is determined whether or not the signal contains an OK signal (S23). If no OK signal is included and all are NG signals (S23: NO), the NG signal is transmitted to the numerical controller 1A (S26), and the process is terminated.

  When the signal returned from the relocation detection devices 30 and 40 includes an OK signal (S23: YES), the NG signal and the OK signal or the NG signal received from each of the relocation detection devices 30 and 40 are written commands. Is transmitted to the numerical control apparatus that has transmitted (S24). Then, it is determined whether or not a distance measurement signal is received from the numerical controller 1A (S20). Until the distance measurement signal is received (S20: NO), the process returns to S20 and enters a standby state. When the distance measurement signal is received (S20: YES), as described above, the distance measurement signal is returned from the signal return circuit 29 to the numerical controller 1A (S21), and the process is terminated. By executing such a unique ID registration process, the unique ID of the numerical control device 1A can be registered in all the relocation detection devices 20, 30, and 40 in one operation.

  Next, processing when registering a unique ID transmitted from another relocation detection apparatus will be described. This process is executed in the same manner as the flow of FIG. First, it is determined whether or not a write command and a unique ID are received from another relocation detection device (S11). When the write command and the unique ID are received (S11: YES), it is further determined whether or not there is a relocation detection device connected to the relocation detection device (S12). For example, the case where the relocation detection apparatus 30 receives a write command and a unique ID from the relocation detection apparatus 20 is applicable. In this case, since the relocation detection device 40 is further connected to the relocation detection device 30, a write command and a unique ID are further transmitted to the relocation detection device 40 (S13).

  That is, the write command and the unique ID transmitted from the numerical control device to the relocation detection device are sequentially transmitted from the next to the next relocation detection device via the relocation detection device directly connected to the numerical control device. Is done. In the relocation detection device that has received the write command and the unique ID from another relocation detection device, the received unique ID is registered. An OK signal or an NG signal is returned depending on the registration result. After receiving an OK signal or an NG signal from another relocation detection device (S14: YES), it is judged whether the received write start command is correct (S15), and if the write start command is correct (S15: YES), it has been received. The unique ID is stored in the flash memory 24 (S16), and “1” is stored in the relocation non-detection flag storage area 243 of the flash memory 24 (S17).

  The OK signal or NG signal in its own relocation detection device and the OK signal or NG signal received from another relocation detection device are all transmitted to the relocation detection device directly connected to the numerical control device that requested registration of the unique ID. (S18, S19, S22 to S26) and sent to the numerical controller that has sent the write start command. Since this process is a registration request from a numerical control device directly connected to another relocation detection device, the relocation detection device and the numerical control device that has transmitted the write command are not directly connected to each other. Therefore, there is no need to measure the communication distance and no distance measurement signal is received, so the processing ends without performing the processing of S20 and S21.

<Relocation detection by the relocation detector 25>
For example, when the numerical control devices 1A to 1C are to be transferred illegally, the numerical control devices 1A to 1C are connected by the wirings 1a to 1c, so that the transfer detection device 20 is assumed to be transferred. In order to prevent such relocation, relocation detection by the relocation detector 25 is executed.

  The relocation detection process by the CPU 21 of the relocation detection device 20 will be described with reference to the flowchart of FIG. This process is executed by calling the relocation detection program stored in the ROM 22 when the unique ID registration process in the relocation detection device 20 is completed. First, the relocation non-detection flag = “1” is stored in the relocation non-detection flag storage area 243 (see FIG. 5) of the flash memory 24 (S71). Next, it is determined whether or not relocation is detected by the relocation detector 25 (S72). Until the relocation is detected (S72: NO), the process returns to S72 and enters a standby state. When relocation is detected (S72: YES), relocation non-detection flag = “0” is stored in relocation non-detection flag storage area 243 (see FIG. 4) (S73). Next, all the unique IDs stored in the unique ID storage area 241A (see FIG. 6) of the flash memory 24 are deleted (S74), and the process ends.

  As will be described later, the numerical control devices 1A to 1C cannot be activated if their own unique ID is not stored in any of the relocation detection devices 20, 30, and 40. Therefore, when the relocation detection device 20 is relocated, the unique ID stored in the flash memory 24 is deleted, so that the activation of the numerical control devices 1A to 1C can be prohibited. Relocation information such as the date and time when the relocation detection device 20 is relocated is stored in a relocation history storage area 242 (see FIG. 5) of the flash memory 24.

<When the numerical controller is turned on: When starting the numerical controller>
The factory worker turns on the power to activate the numerical controller. The numerical controller is powered by the machine tool control panel. In the numerical control device, it is determined whether or not to start when the power is turned on.

  The activation determination process executed by the CPU 5 of the numerical controller 1A will be described with reference to the flowchart of FIG. This process is executed when the activation determination program stored in the ROM 6 is called when the power is turned on. First, a unique ID sending request signal is transmitted to the relocation detection device 20 (S31). This is for confirming whether its own unique ID is stored in the relocation detection device 20. The transmission request signal is a command for requesting transmission for all unique IDs registered in the relocation detection device 20. When the relocation detection device 20 receives the sending request signal, it transmits all the unique IDs stored in the unique ID storage area 241A (see FIG. 5) of the flash memory 24 to the numerical control device 1A. If the unique ID is not stored, an error signal is transmitted.

  It is determined whether or not the elapsed time since the transmission request signal is transmitted is timed out (S32). In the case of time-out (S32: YES), since there is some abnormality in the relocation detection device 20 or the wiring, it is prohibited to use (S45), and the process is terminated.

  On the other hand, if it has not yet timed out (S32: NO), it is determined whether an error signal has been received or a unique ID has been received (S33, S34). Until an error signal or unique ID is received (S33: NO, S34: NO), the process returns to S32 and the process is repeated. When the error signal is received (S33: YES), the relocation detection device 20 does not store the unique ID. In this case, since there is a possibility that the numerical control device 1A is illegally connected to the relocation detection device 20, the use is prohibited (S45), and the process is terminated.

  If the unique ID is received before the time-out (S34: YES), it is determined whether or not the received unique ID has its own unique ID (S35). As will be described later, the received unique ID includes not only the unique ID stored in the relocation detection device 20 directly connected to the numerical controller 1A but also the unique ID stored in the relocation detection devices 30 and 40. When these unique IDs do not have their own unique IDs (S35: NO), the numerical control device 1A may be illegally connected to the relocation detection device 20. Therefore, use is prohibited (S45), and the process is terminated.

  On the other hand, if the received unique ID is its own unique ID (S35: YES), a distance measurement signal is transmitted to the relocation detection device 20 in order to measure the communication distance (S36). Simultaneously with the transmission of the distance measurement signal, time measurement is started (S37). As described above, the relocation detection device 20 returns the received distance measurement signal to the numerical control device 1A. On the other hand, it is determined whether or not a distance measurement signal is received from the relocation detection device 20 (S38). Until a distance measurement signal is received (S38: NO), it is determined whether or not a timeout has occurred (S44). When it is not time-out (S44: NO), it returns to S38 and a process will be in a standby state until a distance measurement signal is received. In the case of timeout (S44: YES), since the distance measurement signal is not returned from the relocation detection device 20, there are reasons such as whether the wiring 1a is illegally extended or disconnected, or there is some abnormality in the relocation detection device 20. Conceivable. In this case, use of the numerical control apparatus 1A is prohibited (S45), and the process ends.

  On the other hand, when the distance measurement signal transmitted from the relocation detection device 20 is received (S38: YES), the time measurement is completed (S39), and the propagation time of the distance measurement signal is calculated. Based on the calculated propagation time, a communication distance is calculated (S40). The calculated communication distance is compared with the reference communication distance stored in the flash memory 8 (S41). Based on this comparison, it is determined whether or not the communication distance is normal (S42). If the calculated communication distance is the same as the reference communication distance measured at the time of installation, the wires 1a are connected. Since the communication distance is normal (S42: YES), the numerical control apparatus 1A is normally activated (S43), and the process ends.

  On the other hand, when the calculated communication distance is not the same as the reference communication distance (S42: NO), there is a possibility that another wiring having a different length has been replaced or that communication is being performed via another communication network. In such a case, there is a possibility that the numerical control apparatus 1A has been moved, so the numerical control apparatus 1A is prohibited from use (S45), and the process is terminated. Accordingly, it is possible to prohibit activation of a numerical control apparatus that may have been moved illegally.

  Next, the unique ID transmission processing by the CPU 21 of the relocation detection device 20 will be described with reference to the flowchart of FIG. Here, the unique ID transmission process by the CPU 21 of the relocation detection apparatus 20 will be mainly described. This process is executed when the unique ID transmission program stored in the ROM 22 is called when the power of the relocation detection apparatus 20 is turned on. First, it is determined whether or not “0” is stored in the relocation non-detection flag storage area 243 (see FIG. 5) of the flash memory 24 (S51). If “0” is stored (S51: YES), it is then determined whether a unique ID sending request signal has been received from the numerical controller (S60). If the sending request signal has not been received (S60: NO), the process is terminated as it is. For example, when a transmission request signal is received from the numerical control device 1A (S60: YES), since the relocation of the relocation detection device 20 is detected, an error signal is transmitted to the numerical control device 1A (S61).

  On the other hand, when “1” is stored in the relocation non-detection flag storage area 243 (see FIG. 5) (S51: NO), since at least relocation has not been detected, the numerical controller sends a unique ID sending request signal. It is determined whether or not it has been received (S52). When the sending request signal is not received (S52: NO), the processing is ended as it is.

  For example, when a unique ID sending request signal is received from the numerical controller 1A (S52: YES), it is subsequently determined whether there is another relocation detection device (S53). In the example shown in FIG. 2, since the relocation detection device 30 is connected to the relocation detection device 20 (S53: YES), a unique ID sending request signal is transmitted to the relocation detection device 30 (S57). ).

  Here, in the unique ID transmission process by the CPU 21 of the relocation detection device 30, since the relocation detection device 40 is connected to the relocation detection device 30 (S53: YES), a unique ID sending request signal is transmitted to the relocation detection device 40. (S57). The CPU 21 of the relocation detection device 40 transmits all the unique IDs stored in the unique ID storage area 241C (see FIG. 8) of the flash memory 24 to the relocation detection device 30. The CPU 21 of the relocation detection device 30 combines the unique ID received from the relocation detection device 30 and the unique ID stored in the unique ID storage area 241B (see FIG. 7) of its own flash memory 24 in the relocation detection device 20. Send all.

  Returning to the unique ID registration process by the CPU 21 of the relocation detection device 20, the unique ID is received from the relocation detection device 30 (S58). Then, the unique ID stored in the unique ID storage area 241A and the unique ID transmitted from the relocation detection device 30 (including the unique ID transmitted from the relocation detection device 40) are transmitted to the numerical control device 1A. (S59). Thereby, even if the unique ID is not stored in the relocation detection device 20 directly connected to itself, the numerical control device 1A starts normally if the unique ID is stored in the other relocation detection device 30 or 40. it can.

  Next, it is determined whether or not a distance measurement signal has been received from the numerical control apparatus 1A that has received the transmission request signal (S55). Until the distance measurement signal is received (S55: NO), the process returns to S55 and enters a standby state. When the distance measurement signal is received (S55: YES), as described above, the distance measurement signal is returned from the signal return circuit 29 to the numerical controller 1A (S56), and the process is terminated.

  As shown in FIG. 1, when there is no other adjacent relocation detection device (S53: NO), all the unique IDs stored in the unique ID storage area 241A have transmitted the transmission request signal. (S54). Thereafter, it is determined whether or not a distance measurement signal has been received from the numerical control apparatus that has received the transmission request signal (S55). Until the distance measurement signal is received (S55: NO), the process returns to S55 and enters a standby state. When the distance measurement signal is received (S55: YES), as described above, the distance measurement signal is returned from the signal return circuit 29 to the numerical controller (S56), and the process is terminated.

  Next, power supply switching processing by the CPU 21 of the relocation detection device 20 will be described with reference to FIG. 4 and a flowchart of FIG. This process is executed when the power supply switching program stored in the ROM 22 is called up when the relocation detection apparatus 20 is powered on. First, it is determined whether or not the output voltage of the AC / DC converter 32 is normal (S81). The AC / DC converter 32 changes the alternating current supplied from the alternating current power supply 35 into a direct current and outputs the direct current. The output voltage of the AC / DC converter 32 is detected by the abnormal voltage detection circuit 26. When the output voltage of the AC / DC converter 32 is normal (S81: YES), the switch 41 is turned on, the switch 42 is turned off, and the switch 43 is turned off (S82). In this case, power is supplied from the AC power supply 35 to the relocation detection device 20. Next, returning to S81, the output voltage of the AC / DC converter 32 is continuously monitored.

  When the AC power supply 35 is broken, the output voltage of the AC / DC converter 32 changes. If there is such a voltage abnormality (S81: NO), it is subsequently determined whether or not the output voltage of the AC / DC converter 10 is normal (S83). The AC / DC converter 10 changes the alternating current supplied from the alternating current power supply 16 of the numerical control apparatus 1A into a direct current and outputs the direct current. The output voltage of the AC / DC converter 10 is detected by the abnormal voltage detection circuit 26. When the output voltage of the AC / DC converter 10 is normal (S83: YES), the switch 41 is turned off, the switch 42 is turned on, and the switch 43 is turned off (S84). In this case, power is supplied to the relocation detection device 20 via the AC power supply 16, the AC / DC converter 10, and the relocation detection I / F 33. Thereby, even when the AC power supply 35 cannot be used, the AC power supply 16 of the numerical control device can be used and the relocation detection device 20 can be operated. Then, an abnormal signal is transmitted to the numerical control apparatus 1A (S85), and the process ends. In the numerical control apparatus 1A to which the abnormality signal is transmitted, it is displayed that there is an abnormality on the screen of the operation panel. Since the worker can recognize the abnormality of the AC power supply 35 of the relocation detection device 20, a quick response is possible.

  On the other hand, for example, when the power source of the numerical control device 1A is turned off at night, power cannot be supplied from the AC power source 16. In this case, assuming that the output voltage of the AC / DC converter 10 is abnormal (S83: NO), the switch 41 is turned off, the switch 42 is turned off, and the switch 43 is turned on (S86). In this case, the battery 28 supplies power to the relocation detection device 20. Thereby, even when AC power supplies 16 and 35 cannot be used, the battery 28 can be used, so that the relocation detection device 20 can be operated. Then, an abnormal signal is transmitted to the numerical control apparatus 1A (S85), and the process ends.

  The relocation detection device 20 normally uses power from the AC power source 35, but cannot supply power if the AC power source 35 is broken. In such a case, it is possible to switch to the AC power source 16 used by the numerical controller 1A. Thereby, even in a state where the AC power supply 35 is broken and cannot be used, as described above, it is possible to execute a process for restricting the activation of the numerical control devices 1A to 1C. Furthermore, since the power supplied from the battery 28 can be used even when the AC power supply 16 of the numerical control devices 1A to 1C cannot be used, the process by the relocation detection device 20 can be executed reliably.

  Next, the battery exhaustion detection process by the CPU 21 of the relocation detection device 20 will be described with reference to the flowchart of FIG. The battery exhaustion detection process is executed when the battery exhaustion detection program stored in the ROM 22 is called up when the switch 43 shown in FIG. 4 is turned on. First, it is determined whether the voltage of the battery 28 is less than a predetermined value and the battery is dead (S91). While the battery is not exhausted (S91: NO), the process returns to S91 and enters a standby state. If the battery is dead (S91: YES), all the unique IDs stored in the unique ID storage area 241A (see FIG. 6) of the flash memory 24 are deleted (S92), and the process is terminated. As described above, since all the unique IDs are deleted, the activation of the numerical control devices 1A to 1C can be prohibited when the battery 28 has run out and the relocation detection device 20 cannot operate.

  As described above, in the relocation detection system 200 according to the present embodiment, a plurality of relocation detection devices directly connected by a plurality of numerical control devices are connected to each other. When the manufacturer installs the relocation detection system 200 in a factory, the manufacturer registers a unique ID, which is identification information of each numerical control device, in the relocation detection devices 20 to 40. The unique ID can be stored not only in the moving detection device directly connected to the numerical control device but also in other moving detection devices connected to the moving detection device. If the unique ID registered in the relocation detection devices 20 to 40 and the unique ID of the numerical control device do not match when the numerical control device is activated, the numerical control device is not activated. Therefore, the manager of the factory can prevent the use of the numerical control device that is illegally connected to the relocation detection device, and can manage a plurality of numerical control devices collectively.

  For example, as shown in FIG. 1, when the operator registers the unique ID of the numerical control device 1A in the relocation detection device 20, it is also registered in the relocation detection devices 30 and 40. For example, even when the numerical control device 1A as the first group is removed from the relocation detection device 20 and connected to the relocation detection devices 30 and 40, the numerical control device 1A starts normally. Therefore, the numerical control device can be moved within the system.

  Further, when the relocation detection device 20 is relocated illegally, the relocation of the relocation detection device 20 is detected by detecting the vibration. When the relocation is detected, the unique ID is deleted, so that it is possible to prohibit starting the numerical control device. The unique ID can be registered again when the manufacturer inputs a correct write command to the numerical control device. Therefore, it is possible to prevent the unique ID from being registered by an unauthorized trader.

  Further, for example, even when the unique ID of the numerical control device 1A is stored in the relocation detection device 20, there is a possibility that it is replaced with another wiring or communicating using another communication network. Therefore, the communication distance between the relocation detection device 20 and the numerical control device 1A is measured and compared with the reference communication distance. If it is not the same as the reference communication distance, it is abnormal and the activation of the numerical control device is prohibited. In this way, it is possible to prevent any situation that is likely to be relocated, and to change the arrangement of the numerical control device within a certain range, so that it is possible to provide a relocation detection system 200 that is highly safe and easy to use. .

  In the above description, the numerical control devices 1A to 1C, 2A to 2C, and 3A to 3C correspond to the “machine” of the present invention, and the transfer detection devices 20, 30, and 40 correspond to “transfer detection means” of the present invention. The flash memory 8 corresponds to the “machine storage means” of the present invention, the unique ID storage area 241A of the flash memory 24 corresponds to the “identification information storage means” of the present invention, and the relocation detection I / F 33 corresponds to the “input” of the present invention. The AC / DC converter 32 corresponds to the “converter” of the present invention, the battery 28 corresponds to the “auxiliary battery” of the present invention, and the abnormal voltage detection circuit 26 corresponds to the “abnormality” of the present invention. It corresponds to “detection means”.

  The CPU 21 that executes the process of S17 in FIG. 11 corresponds to the “release means” of the present invention. The CPU 21 that executes the processes of S11 to S16 in FIG. 11 corresponds to the “identification information acquisition unit” of the present invention. The CPU 5 that executes the process of S35 in FIG. 13 corresponds to the “identity information matching means” of the present invention. The CPU 5 that executes the process of S43 in FIG. 13 corresponds to the “operation permission unit” of the present invention. The CPU 5 that executes the process of S45 of FIG. 13 corresponds to the “operation prohibiting means” of the present invention. The CPU 21 that executes the process of S84 in FIG. 15 corresponds to the “power supply means” of the present invention, the CPU 21 that executes the process of S86 corresponds to the “switching means” of the present invention, and the CPU 21 that executes the process of S85 It corresponds to “notification means” of the present invention. The CPU 21 that executes the process of S91 in FIG. 16 corresponds to the “auxiliary battery supply detection unit” of the present invention, and the CPU 21 that executes the process of S92 corresponds to the “deletion unit” of the present invention.

  In addition, it cannot be overemphasized that the transfer detection apparatus of this invention is not restricted to the said embodiment but various deformation | transformation is possible. For example, in the above embodiment, as shown in FIG. 4, the power supply in the relocation detection device 20 is provided by providing switches 41 to 43 on three power supply lines and controlling the opening and closing of the switches 41 to 43. The power supply source is switched. In addition, for example, as shown in FIG. 18, a diode 81 may be provided instead of the switch 41, a diode 82 may be provided instead of the switch 42, and a diode 80 may be provided instead of the switch 43.

  In this case, the voltage of the AC power source 35 is set highest, and the AC power source 16 and the battery 28 are decreased in this order. Since current flows from the AC power supply 35 having the highest voltage, the current flowing from the AC power supply 35 can be used in a normal state. When no current flows from the AC power supply 35, a current flows from the AC power supply 16 having the next highest voltage toward the transfer detection device 220. Furthermore, when the current supplied from the AC power supply 16 is also stopped, the current flowing from the battery 28 can be used. That is, the same effect as that of the first embodiment can be obtained.

  Further, in the above embodiment, when the abnormal voltage detection circuit 26 detects an abnormality in the output voltage of the AC / DC converter 32, the switch 42 (see FIG. 15: refer to S84) is turned on to turn on the numerical controller 1A. Although the power of the AC power supply 16 is used, the power of the battery 28 may be directly used by turning on the switch 43 (FIG. 15: S86).

  In the above embodiment, the communication distance between the numerical control device and the relocation detection device is measured, and the activation of the numerical control device is determined based on whether or not the communication distance is normal. It may be determined depending on whether or not this is the case.

  Further, the connection state between the numerical control device and the relocation detection device, and the relocation detection device and another relocation detection device may be constantly monitored, and if not connected, it may be determined that the communication is abnormal. In the embodiment described above, the wiring is used for connection, but wireless connection may be used.

  In addition, the deletion unit deletes the identification information stored in the identification information storage unit, but may store a flag indicating that the identification information is deleted.

5 CPU
6 ROM
8 Flash Memory 9 Input / Output Interface 10 Converter 11 Communication Distance Measuring Circuit 16 AC Power Supply 20 Relocation Detection Device 21 CPU
22 ROM
24 Flash memory 25 Relocation detector 26 Abnormal voltage detection circuit 27 Switch drive circuit 28 Battery 29 Signal return circuit 32 AC / DC converter 33 Relocation detection I / F
35 AC power supply 41 switch 42 switch 43 switch 45 comparator 58 communication distance calculation circuit 81 diode 82 diode 83 diode 200 relocation detection system

Claims (5)

In a relocation detection system comprising relocation detection means for detecting relocation, a machine connected to the relocation detection means, and an operation prohibiting means for prohibiting operation of the machine when the relocation detection means detects relocation,
The machine includes machine storage means for storing individual identification information,
The relocation detection means includes
An input / output unit connectable to the machine and other moving detection means;
Identification information acquisition means for acquiring the identification information of the machine connected to the input / output unit and the machine connected to the other relocation detection means;
An identification information storage means for storing the identification information acquired by the identification information acquisition means,
Identification information matching judgment means for judging whether or not the identification information stored in the machine storage means and the identification information stored in the identification information storage means match;
A relocation detection system comprising: an operation permission means for permitting the machine to operate only when the identification information matching determination means determines that the identification information matches each other. The relocation detection means includes a converter for converting from an AC power source to a DC power source,
The relocation detection system according to claim 1, wherein the converter converts an AC power supply independent of a power supply of the machine into a DC power supply and drives the relocation detection means. The relocation detection means includes
An abnormality detecting means for detecting an abnormality of the converter;
A power supply means for supplying power to the relocation detection means when the abnormality detection means detects the abnormality;
The relocation detection system according to claim 2, further comprising notification means for notifying the machine of an abnormality when the abnormality detection means detects the abnormality. The relocation detection means includes
An auxiliary battery for power backup of the relocation detection means;
An abnormality detecting means for detecting an abnormality of the converter;
A switching means for switching so that the power of the auxiliary battery is supplied to the relocation detecting means from the DC power converted by the converter when the abnormality detecting means detects the abnormality. The relocation detection system according to 2.   The relocation detection means includes an auxiliary battery supply detection means for detecting the presence or absence of power supply of the auxiliary battery, and the identification information stored in the identification information storage means when the auxiliary battery supply detection means detects no power supply. 5. The relocation detection system according to claim 4, further comprising deletion means for deleting information.

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