JP5948834B2 - Relocation detection apparatus and control method - Google Patents

Description

  The present invention relates to a relocation detection apparatus and a control method for detecting relocation of a machine.

  Conventionally, the relocation detection device has a technique for monitoring relocation of a machine. For example, the relocation detection device detects and stores vibrations applied to the device during the power-off period of the machine. It is determined whether or not there is a vibration history after the power is turned on again. If there is a vibration history, startup of the device is prohibited. For example, a numerical control device having a relocation detection function disclosed in Patent Document 1 includes an inclination detection unit, a relocation determination unit, and a use prohibition unit. The inclination detection means is, for example, an acceleration sensor. The relocation determination means detects and stores a change in gravitational acceleration detected by the acceleration sensor and outputs a relocation detection signal when the relocation detection device with the acceleration sensor fixed tilts. The use prohibiting means prohibits the use of the numerical control device when it is determined that it has been relocated.

JP 2009-134561 A

  The above-described apparatus has a problem in that when an earthquake occurs, it is impossible to distinguish between vibrations generated during relocation and vibrations caused by the earthquake, and erroneous detection is performed.

  An object of the present invention is to provide a relocation detection apparatus and a control method that can prevent erroneous detection due to an earthquake.

Relocation detecting apparatus according to the first aspect of the present invention is connected to a machine tool, when the vibration detecting means for detecting vibration is detected vibrations, a relocation detecting device for prohibiting the startup of the machine tool, wherein installed in other locations away from the own point installed vibration detecting means, in other relocation detection device capable of communicating relocation detection device comprise other vibration detecting means, said vibration detecting means, the other vibration detecting means The simultaneous vibration determining means for determining whether vibration is detected at the same time and the simultaneous vibration determining means determine that the vibration detecting means has detected vibration simultaneously with the other vibration detecting means. A canceling means for canceling the prohibition of starting, a receiving means for transmitting vibration information which is transmitted by the other moving detection device and detected by the other vibration detecting means, and the vibration detecting means is vibrated. The Based on the vibration information received by the receiving means, the first obtaining means for obtaining the first elapsed time until the response recognition time that has been recognized that communication with the other relocation detection device is possible after taking out, A second acquisition unit configured to acquire a second elapsed time from a time when the other vibration detection unit detects a vibration until a time corresponding to the response recognition, and the simultaneous vibration determination unit includes the second acquisition unit. When the acquired first elapsed time coincides with the second elapsed time acquired by the second acquisition means, the vibration detection means determines that vibration has been detected simultaneously with the other vibration detection means. It is characterized by .

The relocation detection device of the first aspect has the following effects. The vibration caused by the relocation of the machine tool is local. Earthquakes sway at the same time in a wide area, at least in one factory building. In this aspect, for example, when vibration is detected at the same time as other vibration detection means installed at locations apart from each other in the factory, it is determined that an earthquake has occurred. The relocation detection device cancels the start prohibition of the machine tool. Therefore, this aspect can prevent a machine tool from stopping unexpectedly due to an erroneous detection due to an earthquake. In this aspect, in the case of erroneous detection, the prohibition of activation is canceled, so that the sensitivity of the vibration detecting means can be increased, for example. Moreover, in the first aspect, for example, by receiving vibration information from another moving detection device at another point away from the moving detection device, it is possible to recognize vibration generated in the machine tool at another point. Also, in the first aspect, the first elapsed time from when the vibration detector at its own point detects vibration until it recognizes that it can communicate with another moving detection device, and at the other point When the second elapsed time from when another vibration detector detects the vibration until the time corresponding to the response recognition matches, the vibration detected at the local point and the vibration detected at the other point are the same I understand. Therefore, it can be determined that the vibration detected by the vibration detecting means is an earthquake shake.

  In the first aspect, the vibration detecting means may be provided in the machine tool. Therefore, the vibration detection means can directly detect the vibration generated in the machine tool.

In the first aspect, the relocation sensing device may be capable of communicating with the other relocation sensing device to be connected to other machine tools. For example, by receiving vibration information from another moving detection device at another point away from the moving detection device, it is possible to recognize the vibration generated in the machine tool at the other point.

The control method according to the second aspect of the present invention is a relocation detection device that prohibits activation of the machine tool when the vibration detection means connected to the machine tool and detects vibration detects the vibration, installed in other locations away from the own point installed detection means, a control method of another relocation detection device capable of communicating relocation detection device comprise other vibration detecting means, said vibration detecting means, the other vibration A simultaneous vibration determining step for determining whether or not vibration is detected simultaneously with the detecting means; and when the vibration detecting means determines that the vibration is simultaneously detected with the other vibration detecting means in the simultaneous vibration determining step, a release step for releasing the prohibition of activation of the machine, the other relocation sensing device transmits a reception step of the other vibration detecting means receives the vibration information, which is information of the detected vibration, said vibration detecting hands The first acquisition step of acquiring the first elapsed time from the detection of vibration until the response recognition time when it is recognized that communication with another relocation detection device is possible, and the vibration information received in the reception step A second acquisition step of acquiring a second elapsed time from the detection of vibration by the other vibration detection means to a time corresponding to the response recognition, in the simultaneous vibration determination step, When the first elapsed time acquired in the acquisition step coincides with the second elapsed time acquired in the second acquisition step, the vibration detection unit detects vibration simultaneously with the other vibration detection unit. It is characterized by judging .

  The control method of the second aspect has the following effects. The vibration caused by the relocation of the machine tool is local. Earthquakes sway at the same time in a wide area, at least in one factory building. In this aspect, for example, when vibration is detected at the same time as other vibration detection means installed at locations apart from each other in the factory, it is determined that an earthquake has occurred. The relocation detection device cancels the start prohibition of the machine tool. Therefore, this aspect can prevent a machine tool from stopping unexpectedly due to an erroneous detection due to an earthquake. In this aspect, in the case of erroneous detection, the prohibition of activation is canceled, so that the sensitivity of the vibration detecting means can be increased, for example.

The figure which shows the state which communicates mutually in the position where the moving detection apparatuses 30 and 60 separated. The block diagram which shows each electric structure of the machine tools 1 and 2 and the moving detection apparatuses 30 and 60. FIG. The conceptual diagram which shows the various storage area of the flash memory. The flowchart of the machine starting control process which CPU31 performs. The flowchart of the flag information transmission process which CPU31 performs. The flowchart of the starting determination process which CPU11 performs. The figure of the modification 1. The figure of the modification 2.

  Hereinafter, an embodiment of the present invention will be described. As shown in FIG. 1, the machine tools 1 and 2 are installed at positions separated from each other, for example, in a factory floor. The machine tool 1 is installed at its own point, for example. The machine tool 2 is installed at another point, for example. The machine tools 1 and 2 are machines that perform cutting on a workpiece by rotating a tool at a high speed, for example. The machine is not limited to a machine tool. The machine tool 1 is provided with a relocation detection device 30 inside, for example. The machine tool 2 has a relocation detection device 60 provided therein, for example. The relocation detection device 30 restricts the activation of the machine tool 1 when the relocation of the machine tool 1 is detected. The relocation detection device 60 restricts the activation of the machine tool 2 when the relocation of the machine tool 2 is detected. The transfer detection devices 30 and 60 detect vibration applied to the machine tools 1 and 2 to determine whether the machine tools 1 and 2 are transferred.

  The relocation detection devices 30 and 60 can communicate with each other via a communication line 70 (see FIG. 2) described later. When the relocation detection devices 30 and 60 detect the vibrations of the machine tools 1 and 2, respectively, the movement detection devices 30 and 60 limit the activation of the machine tools 1 and 2 and transmit and receive vibration information described later. The relocation detection devices 30 and 60 determine whether or not the detected vibration is an earthquake shake based on the own vibration information and the received vibration information. When the relocation detection devices 30 and 60 determine that the detected vibration is a shake of an earthquake, the start restriction of the machine tools 1 and 2 is released. Therefore, the relocation detection devices 30 and 60 can prevent erroneous detection due to earthquake shaking.

  The electrical configuration of the machine tool 1 will be described with reference to FIG. The machine tool 1 includes a CPU 11, a ROM 12, a RAM 13, a machine I / F 14, an external input / output device 15, an axis control unit 21, a display device 22, an operation unit 23, a transfer detection device 30, and the like. The ROM 12, the RAM 13, the machine I / F 14, and the external input / output device 15 are connected to the CPU 11 by, for example, a high-speed bus. The CPU 11 comprehensively controls the operation of the machine tool 1. The ROM 12 stores various programs and the like. The RAM 13 temporarily stores various information. The axis control unit 21 is connected to the machine I / F 14. The axis control unit 21 is, for example, a servo motor amplifier of the machine tool 1. The display device 22, the operation unit 23, and the relocation detection device 30 are connected to the external input / output device 15 by, for example, a low-speed bus. As shown in FIG. 1, the display device 22 and the operation unit 23 are provided, for example, on the front surface of the cover 5 of the machine tool 1. The cover 5 covers the periphery of the machine tool 1. The display device 22 displays various screens. The operation unit 23 is a device for inputting various information.

  With reference to FIG. 2, the electrical configuration of the relocation detection device 30 will be described. The relocation detection device 30 includes a CPU 31, a vibration detection unit 32, a real time clock 33, a flash memory 34, a communication I / F 35, a built-in battery 36, and the like. The vibration detector 32 is fixed to the machine tool 1. The vibration detection unit 32 detects the vibration generated in the machine tool 1 and determines the presence or absence of relocation. The vibration detection unit 32 may detect the presence or absence of relocation by detecting, for example, acceleration or inclination in addition to vibration. The real time clock 33 is, for example, an integrated circuit that keeps the current time even when the computer is turned off. The real time clock 33 can be driven by, for example, a built-in battery 36. The flash memory 34 includes various storage areas described later. One end of the communication line 70 is connected to the communication I / F 35. The other end of the communication line 70 is connected to a communication I / F 65 described later of the relocation detection device 60.

  The electrical configurations of the machine tool 2 and the transfer detection device 60 are the same as the electrical configurations of the machine tool 1 and the transfer detection device 30 described above. The machine tool 2 includes a CPU 41, a ROM 42, a RAM 43, a machine I / F 44, an external input / output device 45, an axis control unit 51, a display device 52, an operation unit 53, a transfer detection device 60, and the like. The relocation detection device 60 includes a CPU 61, a vibration detection unit 62, a real time clock 63, a flash memory 64, a communication I / F 65, a built-in battery 66, and the like. The other end of the communication line 70 is connected to the communication I / F 65 of the relocation detection device 60. Therefore, the relocation detection devices 30 and 60 can communicate with each other.

  With reference to FIG. 3, the various storage areas of the flash memory 34 will be described. The flash memory 34 includes a vibration history information storage area 341, an activation restriction flag storage area 342, a clock value storage area 343, and the like. The vibration history information storage area 341 stores vibration history information so as to be readable. The vibration history information is information related to the date and time when the vibration detection unit 32 detects vibration, for example. The vibration history information can be displayed on the display device 22. The activation restriction flag storage area 342 stores an activation restriction flag. The activation restriction flag is 1 or 0, for example. The CPU 11 stores 1 in the activation restriction flag storage area 342 when the activation restriction is applied. The start restriction flag is turned on. When canceling the activation restriction, the CPU 11 stores 0 in the activation restriction flag storage area 342. The start restriction flag is turned off. The clock value storage area 343 stores the clock value X1 and the like of the real-time clock 33. The clock value X1 is, for example, a clock value when the vibration detection unit 32 detects vibration.

  The machine activation restriction process will be described with reference to the flowchart of FIG. The machine activation restriction process is a process executed by the CPU 31 of the relocation detection device 30. For example, when the power of the machine tool 1 is turned off, the CPU 31 calls a machine activation restriction program stored in, for example, the flash memory 34 and executes this processing. The CPU 61 of the relocation detection device 60 can also execute the same process.

  First, the CPU 31 starts the operation of the real time clock 33 (S1). The CPU 31 determines whether vibration is detected (S2). The vibration detection unit 32 detects the vibration of the machine tool 1. The vibration of the machine tool 1 includes at least vibration generated when the machine tool 1 is moved and vibration caused by an earthquake. The vibration detection unit 32 similarly detects these vibrations without distinction. The CPU 31 returns to S2 and repeats the process until the vibration detection unit 32 detects vibration (S2: NO).

  When the vibration detection unit 32 detects vibration (S2: YES), the CPU 31 stores 1 in the activation restriction flag storage area 342 (see FIG. 3) of the flash memory 34 and turns on the activation restriction flag (S3). The CPU 31 stores the current clock value X1 of the real-time clock 33 in the clock value storage area 343 (see FIG. 3) of the flash memory 34 (S4). The CPU 31 stores the vibration date and time in the vibration history information storage area 341 (see FIG. 3) of the flash memory 34.

  The CPU 31 determines whether or not communication with other relocation detection devices 60 is possible (S5). The CPU 31 transmits a response request signal to the relocation detection device 60, for example. When receiving the response request signal, the CPU 61 of the relocation detection device 60 returns a response signal, for example, to the relocation detection device 30. CPU31 will be in a standby state until a response signal is received. When receiving the response signal, the CPU 31 determines that communication is possible (S5: YES), and further acquires the current clock value Y1 of the real-time clock 33 (S6). The CPU 31 transmits vibration information to the relocation detection device 60 (S7). The vibration information is information including the clock value X1 stored in the flash memory 34 and the acquired clock value Y1.

  The CPU 31 determines whether or not the moving detection device 60 has vibration information of the machine tool 2 (S8). The vibration information of the machine tool 2 is information including clock values X2 and Y2, for example. The clock value X2 is, for example, the clock value of the real-time clock 63 when the vibration detection unit 62 detects vibration. The clock value Y2 is the clock value of the real-time clock 63 that is currently acquired. When the relocation detection device 60 does not detect the vibration of the machine tool 2, the clock value X <b> 2 is not stored in the flash memory 64. Therefore, there is no vibration information of the machine tool 2. For example, the CPU 31 may transmit a confirmation signal to the relocation detection device 60. The confirmation signal is a signal for instructing confirmation of presence / absence of vibration information, for example. The CPU 61 of the relocation detection device 60 returns a response signal indicating the presence / absence of vibration information.

  When the CPU 31 determines that there is no vibration information of the machine tool 2 (S8: NO), the machine activation control process ends. The transfer detection device 30 detects the vibration of the machine tool 1, but the transfer detection device 60 does not detect the vibration of the machine tool 2. Therefore, the possibility of moving the machine tool 1 is high. The activation restriction flag stored in the activation restriction flag storage area 342 is 1. Therefore, the machine tool 1 cannot be activated in the activation determination process described later.

  When the CPU 31 determines that the transfer detection device 60 has vibration information of the machine tool 2 (S8: YES), the CPU 31 acquires the vibration information of the machine tool 2 from the transfer detection device 60 (S9). The CPU 31 calculates the elapsed clock numbers K1 and K2 (S10). The elapsed clock number K1 is the number of clocks corresponding to the elapsed time from when the vibration detection unit 32 detects vibration to the present. The elapsed clock number K1 is X1-Y1. The elapsed clock number K2 is X2-Y2.

  The CPU 31 determines whether the error between K1 and K2 is within an allowable range (S11). The allowable range of error can be set in advance by the operator. When the CPU 31 determines that the error between K1 and K2 is within the allowable range (S11: YES), it stores 0 in the activation restriction flag storage area 342 and turns off the activation restriction flag (S12). K1 and K2 are almost the same. The number of clocks from when the transfer detection device 30 detects the vibration of the machine tool 1 to the present and the number of clocks from the time when the transfer detection device 60 detects the vibration of the machine tool 2 to the present match. The possibility that the machine tool 1 and the machine tool 2 are shaken at the same time is high. The possibility of an earthquake is high. The possibility of moving the machine tool 1 is low. The CPU 31 turns off the activation restriction flag. Therefore, the machine tool 1 can be activated in the activation determination process described later. The CPU 31 returns to S3 and continuously monitors the relocation of the machine tool 1 because the vibration that has occurred in the machine tool 1 is an earthquake.

  The flag information transmission process will be described with reference to the flowchart of FIG. The flag transmission process is a process executed by the CPU 31 of the relocation detection device 30. This process is a process executed periodically. First, the CPU 31 determines whether or not a flag information request signal has been received from the CPU 11 of the machine tool 1 (S21). When the power of the machine tool 1 is turned on, the CPU 11 of the machine tool 1 transmits a flag information request signal to the relocation detection device 30 in an activation determination process described later. The flag information request signal is a signal for requesting information on the activation restriction flag.

  When the CPU 31 determines that it has not received the flag request signal (S21: NO), it ends this process. When receiving the flag request signal (S21: YES), the CPU 31 transmits flag information to the CPU 11 of the machine tool 1 (S22). The flag information relates to the start restriction flag, for example, information indicating on / off (1 or 0). The CPU 31 ends this process.

  The activation determination process will be described with reference to the flowchart of FIG. The activation determination process is a process executed by the CPU 11 of the machine tool 1. When the power of the machine tool 1 is turned on, the CPU 11 calls a program stored in the ROM 12 and executes this processing. First, the CPU 11 transmits a flag information request signal to the CPU 11 of the relocation detection device 30 (S31). The CPU 31 of the relocation detection device 30 returns flag information based on the flag information transmission process described above. The CPU 11 determines whether flag information has been received (S32). Until the CPU 11 receives the flag information (S32: NO), the CPU 11 returns to S32 and enters a standby state.

  When the CPU 11 receives flag information (S32: YES), the CPU 11 determines whether or not the activation restriction flag is on based on the received flag information (S33). When the CPU 11 determines that the activation restriction flag is on (S33: YES), the activation is prohibited (S34). As described above, if the activation restriction flag is on, the possibility of relocation is high. Therefore, this embodiment can prohibit the starting of the machine tool 1 when the machine tool 1 is moved illegally.

  When the CPU 11 determines that the activation restriction flag is off (S33: NO), the machine tool 1 is normally activated (S35). As described above, if the activation restriction flag is off, the possibility of relocation is low. Therefore, according to the present embodiment, the machine tool 1 can be started normally even if there is an earthquake shake.

In the above description, the CPU 31 that executes S9 to S11 of FIG. 4 is an example of the simultaneous vibration determining means of the present invention. CPU31 which performs the process of S12 is an example of the cancellation | release means of this invention.
The CPU 31 that executes the process of S9 is an example of the receiving means of the present invention. CPU31 which performs the process of S4, S6, S10 is an example of the 1st acquisition means of this invention. CPU31 which performs the process of S9 and S10 is an example of the 2nd acquisition means of this invention. Y1-X1 is an example of the first elapsed time of the present invention. Y2-X2 is an example of the second elapsed time of the present invention.

  As described above, the transfer detection device 30 of this embodiment is provided in the machine tool 1. The relocation detection device 60 is provided in the machine tool 2. The machine tool 1 and the machine tool 2 are in positions apart from each other. The relocation detection device 30 includes a CPU 31. The CPU 31 starts the operation of the real-time clock 33 when the power of the machine tool 1 is turned off. When detecting the vibration of the machine tool 1, the CPU 31 turns on the activation restriction flag stored in the flash memory 34. The CPU 31 stores the clock value X1 when the vibration of the machine tool 1 is detected. The CPU 31 communicates with another relocation detection device 60. The CPU 31 acquires the current clock value Y1. The CPU 31 acquires the vibration information of the machine tool 2 when the transfer detection device 60 has the vibration information of the machine tool 2. The vibration information of the machine tool 2 includes clock values X2 and Y2. The CPU 31 calculates the elapsed clock numbers K1 and K2. The elapsed clock number K1 is Y1-X1. The elapsed clock number K2 is Y2-X2. The CPU 31 determines whether the error between K1 and K2 is within an allowable range. When the CPU 31 determines that the error of K1 and K2 is within the allowable range, there is a high possibility that the machine tool 1 and the machine tool 2 are shaken simultaneously. The possibility of an earthquake is high. The possibility of moving the machine tool 1 is low. The CPU 31 turns off the activation restriction flag. Therefore, the relocation detection device 30 can prevent erroneous detection due to an earthquake.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible. Hereinafter, the first and second modifications will be described.

  A first modification will be described with reference to FIG. The relocation detection device 130 is provided in the machine tool 100. The machine tool 100 is installed, for example, at its own point. For example, the vibration detection device 160 is installed alone at another point. The vibration detection device 160 is a device that detects vibration. The electrical configuration of the vibration detection device 160 is the same as, for example, the electrical configuration of the relocation detection device 60 shown in FIG. The CPU of the relocation detection device 130 executes the machine start control process shown in FIG. 4 in the same manner as described above. Note that the process of S7 need not be executed. The CPU of the relocation detection device 130 acquires vibration information from the vibration detection device 160. Therefore, the first modification can obtain the same effect as the above embodiment. For example, when there are only a few or one machine tool on the factory floor, the above effect can be obtained by installing the vibration detection device 160 at another point as a single device.

  The number of vibration detection devices 160 may be plural. The CPU of the vibration detection device 160 acquires vibration information from a plurality of other points. The CPU of the vibration detection device 160 calculates a plurality of elapsed clock numbers Kn from a plurality of vibration information. The CPU of the vibration detection device 160 can compare with the elapsed clock number K1 at its own point. Therefore, the reliability in determining whether the vibration generated in the machine tool 100 is an earthquake vibration is improved.

  A second modification will be described with reference to FIG. The relocation detection device 30 of the above embodiment is directly attached to the machine tool 1 (see FIG. 1). The relocation detection device 201 is not attached to a machine tool, but is attached to, for example, a pillar, wall, or floor of a factory floor. The three machine tools 1A to 1C are connected to the transfer detection device 201 by wiring (not shown) or the like. The relocation detection device 201 includes a vibration detection unit (not shown). When the vibration detection unit detects vibration, the relocation detection device 201 turns on the activation restriction flag to restrict activation of the machine tools 1A to 1C.

  Similarly to the relocation detection device 201, the relocation detection devices 202 and 203 are attached to, for example, pillars, walls, or floors of a factory floor. The three machine tools 2A to 2C are connected to the transfer detection device 202 by wiring (not shown) or the like. The three machine tools 3A to 3C are connected to the transfer detection device 203 by wiring (not shown) or the like. The relocation detection devices 202 and 203 also include a vibration detection unit (not shown). When the vibration detection unit detects vibration, the relocation detection device 202 turns on the activation restriction flag to restrict activation of the machine tools 2A to 2C. When the vibration detection unit detects vibration, the relocation detection device 203 turns on the activation restriction flag to restrict activation of the machine tools 3A to 3C.

  Each electrical configuration of the relocation detection devices 201 to 203 is the same as that of the relocation detection device 30 (60) shown in FIG. The relocation detection device 201 and the relocation detection device 202 can communicate with each other. Therefore, the relocation detection device 201 and the relocation detection device 202 can transmit and receive vibration information to each other. The relocation detection device 202 and the relocation detection device 203 can communicate with each other. Therefore, the relocation detection device 202 and the relocation detection device 203 can transmit and receive vibration information to and from each other. Each CPU of the relocation detection devices 201 to 203 executes the machine activation control process shown in FIG. 4 in the same manner as described above. When an earthquake occurs, the relocation detection devices 201 to 203 detect vibrations, respectively. Each CPU obtains vibration information at other points and calculates the number of elapsed clocks in the same manner as described above. If the error in the number of elapsed clocks is within an allowable range, there is a high possibility that each point has shaken simultaneously. Each CPU releases the activation restriction by turning off the activation restriction flag. Therefore, the second modification can obtain the same effect as the above embodiment.

  The above embodiment can be variously modified in addition to the first and second modifications. For example, the relocation detection device 30 of the above embodiment acquires vibration information from one relocation detection device 60 at another point. The relocation detection device 30 may acquire a plurality of vibration information from each of the relocation detection devices. The CPU 31 of the relocation detection device 30 calculates a plurality of elapsed clock numbers Kn from a plurality of vibration information. The CPU 31 can compare the elapsed clock number K1 at its own point. Therefore, the reliability in determining whether the vibration generated in the machine tool 1 is an earthquake vibration is improved.

  In the above embodiment, the real-time clock 33 is used to synchronize with other relocation detection devices. Other methods may be used for synchronization. For example, the vibration detection device may be timed with other vibration detection devices, for example, by incorporating a radio clock. Furthermore, the vibration detection devices may always synchronize with each other by synchronizing clocks.

1, 2 Machine tool 30 Relocation detection device 31 CPU
32 Vibration detection unit 33 Real time clock 34 Flash memory 60 Relocation detection device 61 CPU
62 Vibration Detection Unit 63 Real Time Clock 64 Flash Memory 70 Communication Line 100 Machine Tool 130 Relocation Detection Device 160 Vibration Detection Device 201-203 Relocation Detection Device

Claims (4)

When the vibration detecting means connected to the machine tool detects vibration, the moving detection device prohibits the activation of the machine tool, and is separated from the own point where the vibration detecting means is installed. In the relocation detection device that can be communicated with other relocation detection devices provided with other vibration detection means,
It said vibration detecting means, and simultaneously the vibration determination unit that determines whether or not detected at the same time vibrations and the other vibration detecting means,
When the simultaneous vibration determination means determines that the vibration detection means has detected vibration simultaneously with the other vibration detection means, a release means for canceling the prohibition of starting the machine tool ;
Receiving means for receiving vibration information which is transmitted by the other moving detection device and is information of vibration detected by the other vibration detecting means;
A first acquisition means for acquiring a first elapsed time from when the vibration detection means detects vibration until a response recognition time has been recognized that communication with the other relocation detection device is possible;
Second acquisition means for acquiring a second elapsed time from the detection of vibration by the other vibration detection means until the time corresponding to the response recognition based on the vibration information received by the reception means;
With
When the first elapsed time acquired by the first acquisition unit coincides with the second elapsed time acquired by the second acquisition unit, the simultaneous vibration determination unit determines that the vibration detection unit A relocation detecting device characterized in that it is determined that vibration is detected simultaneously with the vibration detecting means .   The relocation detection apparatus according to claim 1, wherein the vibration detection unit is provided in the machine tool. The relocation sensing device, relocation detection apparatus according to claim 1 or 2, characterized in communicable Dearuko and with the other relocation sensing device to be connected to other machine tools. When the vibration detecting means connected to the machine tool detects vibration, the moving detection device prohibits the activation of the machine tool, and is separated from the own point where the vibration detecting means is installed. In the control method of the relocation detection device that can be communicated with other relocation detection devices provided with other vibration detection means ,
It said vibration detecting means, and simultaneously vibrating determination step of determining whether it has detected the vibration at the same time as the other vibration detecting means,
A release step of canceling the prohibition of starting of the machine tool when it is determined in the simultaneous vibration determination step that the vibration detection unit has detected vibration simultaneously with the other vibration detection unit ;
A receiving step of receiving vibration information that is transmitted by the other moving detection device and is information of vibration detected by the other vibration detecting means;
A first acquisition step of acquiring a first elapsed time from when the vibration detection means detects vibration until the response recognition time when it is recognized that communication with the other relocation detection device is possible;
A second acquisition step of acquiring a second elapsed time from a time when the other vibration detection means detects a vibration to a time corresponding to the response recognition based on the vibration information received in the reception step;
With
In the simultaneous vibration determination step, when the first elapsed time acquired in the first acquisition step matches the second elapsed time acquired in the second acquisition step, the vibration detection means A control method characterized in that it is determined that vibration is detected simultaneously with the vibration detecting means .

Images