JP3729921B2 - Magnetic field measuring device for fusion device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a magnetic field measuring apparatus for a nuclear fusion apparatus that measures a magnetic field value of a nuclear fusion apparatus that confines plasma by a magnetic field.
[0002]
[Prior art]
In a fusion device that confines plasma by a magnetic field, the magnetic field directly related to plasma confinement is measured by a magnetic field measurement device at multiple locations, and the measured value is used to hold the plasma in an appropriate position. The current value of the electromagnet that forms the magnetic field is controlled. Conventionally, a magnetic probe (detection coil) or a Hall element using the Hall effect has been used as a sensor for such magnetic field measurement. Since these sensors are placed relatively close to the plasma, they can fail due to heat and radiation.
[0003]
Conventionally, whether or not a sensor is normal is determined by a human monitoring the detection signal. In addition, when it is determined that a failure has occurred, the signal line is connected to a spare sensor.
[0004]
FIG. 15 shows a conventional configuration diagram of such a measuring apparatus, and the configuration and operation of each part will be described below.
[0005]
The magnetic field coils 10-1 to 10-n are coils that generate a magnetic field for confining plasma, and supply current from the electromagnet power supplies 20-1 to 20-n. The plasma control device 40 outputs a current reference value obtained by performing a predetermined control calculation to the power supply control devices 30-1 to 30-n, and the power supply control devices 30-1 to 30-n respectively correspond to the corresponding electromagnets. The power supply 20-1 to 20-n controls the current value supplied to the magnetic field coils 10-1 to 10-n.
[0006]
On the other hand, the magnitudes of the magnetic field values are measured by the detectors 61-1 to 61-m of the plasma measuring devices 60-1 to 60-m, and further amplified by the amplifiers 62-1 to 62-m. Then, the result is input to the signal processing device 50. The signal processing device 50 calculates the magnetic field value at the position where each detector is installed from each input signal as a measurement value, and outputs this result to the plasma control device 40. The plasma control device 40 compares and calculates a predetermined magnetic field value (reference value) and a measurement value obtained by the signal processing device 50, and performs magnetic field coil 10- with respect to the power supply control devices 30-1 to 30-n. The reference value of the current value supplied to 1 to 10-n is output.
[0007]
[Problems to be solved by the invention]
In the conventional apparatus as shown in FIG. 15 described above, the detectors 61-1 to 61-m, which are constituent elements of the plasma measuring devices 60-1 to 60-m, use coils to change the magnetic field as a voltage signal. It outputs and is placed close to the plasma. These detectors 61-1 to 61-m are installed in a high temperature environment and may be exposed to radiation, which may cause a failure such as disconnection. Therefore, a spare detector is installed in advance, and the connection is changed to the spare detector when a failure occurs. In this case, there are the following problems.
[0008]
First, there is a problem that it is difficult to quickly determine whether a failure has occurred.
[0009]
Secondly, since the switch to the spare at the time of failure is performed by a human, there is a problem that the operation must be temporarily interrupted during that time.
[0010]
Therefore, the present invention has been made to solve such a problem, and it is possible to quickly know a failure of the detector, and when a failure is detected, the operation is not interrupted or interrupted. An object of the present invention is to provide a magnetic field measurement device for a fusion device that minimizes time.
[0011]
[Means for Solving the Problems]
  The invention according to claim 1Multiple detectors that output measurement signals obtained by measuring the magnitude of the magnetic field value, one of these detectors as the current detector, the other as the spare detector, and depending on the current detector When a switching signal is input while a measurement signal is selectively output, switching is performed so that the measurement signal of a spare detector is selectively output, and a switch with the spare detector as a current detector, and a current detector as needed A diagnostic signal for diagnosing the spare detector is provided to the spare detector while a diagnostic signal for diagnosing the spare detector as an active detector is provided to the other spare detector by the switching signal. A generator, an amplifier for amplifying a signal based on the diagnostic signal output from the current detector and outputting an amplified signal when the diagnostic signal is given to the spare detector; and From the change state When diagnosing the abnormality of detectors, and a diagnostic device and for outputting the switching signalIt is characterized by that.
[0012]
  The invention according to claim 2 includes a plurality of detectors that output measurement signals obtained by measuring the magnitude of the magnetic field value, one of these detectors as a current detector, and the other as a spare detection. When the switching signal is input, the measurement signal of the detector that has become the current detector is selectively output when the switching signal is input. A switching device for switching, a diagnostic signal generator for providing a diagnostic signal to a detector which is used as an active detector as needed, and an amplified signal obtained by amplifying a signal based on the diagnostic signal when the diagnostic signal is provided And a diagnostic device for outputting the switching signal to the switch when diagnosing an abnormality of the current detector from the change state of the amplified signal,The switching signal output from the diagnostic device is taken in and the spare detector is moved to the measurement position of the active detector so that the measurement position of the spare detector becomes the measurement position of the active detector. And a drive device for switching to the above.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0018]
FIG. 1 is a block configuration diagram of a magnetic field measuring apparatus of a nuclear fusion apparatus showing a first embodiment of the present invention.
[0019]
The first embodiment is a magnetic field measurement device for a fusion apparatus, which includes a detector 1, an amplifier 2, a diagnostic signal generator 3, and a fault diagnostic device 4. The diagnostic signal generator 3 diagnoses the detector 1 as needed. By providing a signal, a signal based on the diagnostic signal of the detector 1 is input to the failure diagnosis device 4 via the amplifier 2, and the failure diagnosis device 4 is characterized by diagnosing a failure of the detector 1.
[0020]
By this means, the diagnostic signal generator 3 gives a diagnostic signal to the detector 1 at any time, and when the detector 1 inputs the diagnostic signal, the detector 1 diagnoses a fault based on the diagnostic signal via the amplifier 2. The failure diagnosis device 4 diagnoses the failure of the detector 1 and notifies the failure of the detector 1.
[0021]
FIG. 2 is a diagram specifically showing the first embodiment, and the detector 1 is constituted by a coil, and a voltage signal v1 is generated at both ends of the coil by a change in magnetic flux B interlinked with the coil. The voltage signal v1 is output to the amplifier 2. The amplifier 2 is a DC amplifier, and amplifies v1 to a signal level that can be input to the failure diagnosis device 4 to obtain an amplified signal v2. The failure diagnosis apparatus 4 is a kind of data processing control apparatus mainly composed of a microcomputer, and includes the following components.
[0022]
The failure diagnosis device 4 receives an amplified signal v2 and converts it into a digital value, an analog input unit 41, a processor 42 for controlling data processing, a memory 43 for storing data, a display unit 44 for outputting data, and a control signal output. And a bus 46 for connecting these parts.
[0023]
The failure diagnosis device 4 periodically outputs an on / off signal from the digital output unit 45, whereby the diagnosis signal generator 3 gives a voltage signal v 3 to the input side of the amplifier 2.
[0024]
Next, the operation of the first embodiment will be described with reference to FIGS.
[0025]
First, a voltage signal v1 is generated at both ends due to a change in the magnetic flux B interlinked with the coil of the detector 1, and the voltage signal v1 that is a signal based on the diagnostic signal is input to the amplifier 2. The amplifier 2 amplifies the voltage signal v <b> 1 so as to obtain a signal level that can be input to the failure diagnosis device 4, obtains an amplified signal v <b> 2, and outputs the amplified signal v <b> 2 to the failure diagnosis device 4. In the failure diagnosis apparatus 4, the amplified signal v <b> 2 is input at a predetermined cycle by the analog input unit 41 and converted into a digital value, and the processor 42 stores this data in the memory 43.
[0026]
For example, as shown in FIG. 3A, when the change in the magnetic flux B is a trapezoidal wave (usually, the change in the magnetic field of the fusion device is like this), the interval in which the change in the magnetic flux B is 0 (in FIG. When the voltage signal v1 increases at a constant value of 0 and the magnetic flux B increases at a constant rate of change in the interval), the voltage signal v1 becomes a positive value (interval b in the figure). Next, when the magnetic flux B maintains a constant value (Drawing section c) The voltage signal v1 becomes zero. Furthermore, when the magnetic flux B decreases (illustration interval d), the voltage signal v1 takes a negative value. In the illustrated section c, since it takes a relatively long time, if the detector 1 fails during this time due to disconnection or the like, the output is 0, so it is impossible to determine whether it is normal or abnormal. Therefore, when the input value of the amplified signal v2 continues for a predetermined time 0, the processor 42 outputs a control signal Ic, which is a diagnosis request signal, from the digital output unit 45. Thereby, the diagnostic signal generator 3 gives the voltage signal v3 as a diagnostic signal to the input side of the amplifier 2. The magnitude of the voltage signal v3 is given by the following equation (1) by the internal resistance R2 of the diagnostic signal generator 3 and the internal resistance R1 of the detector 1.
[0027]
v3 = R1 · E / (R1 + R2) ---- (1)
[0028]
If the detector 1 is disconnected, the internal resistance R1 becomes infinite, and no current flows through the internal resistance R1, and the following equation (2) is obtained.
[0029]
v3 = E ---- (2)
[0030]
Here, E is the internal power supply voltage of the diagnostic signal generator 3, and is a signal based on the diagnostic signal as shown in FIG.
[0031]
As a result of the above formula (1) or formula (2), the voltage signal v3 is input to the amplifier 2 as a signal based on the diagnostic signal, and the amplified signal v2 is input to the failure diagnosis apparatus 4. The failure diagnosis apparatus 4 determines whether the detector 1 is normal or abnormal according to the magnitude of the amplified signal v2. That is, when the value corresponds to the above equation (1), it is determined to be normal, and when the value corresponds to the equation (2), it is determined to be abnormal. 2, 31 is a contact, 32 is a power source (E), 33 is a resistor (R2), and 34 is a relay that turns the contact 31 on and off with a control signal Ic.
[0032]
As described above, according to the first embodiment of the present invention, it is possible to quickly know a failure of the detector, and in the fusion apparatus that generates a constant value magnetic field for a long time, it is caused by the abnormality of the detector. It is possible to avoid inconvenience in advance.
[0033]
FIG. 4 is a block diagram of a magnetic field measurement device for a fusion apparatus according to a second embodiment of the present invention. The magnetic field measurement apparatus for a fusion apparatus includes a plurality of detectors 1-1 and 1-2. A switch 5 for switching the measurement signal of the selected detector; an amplifier 2 for inputting the measurement signal switched by the switch 5; a diagnostic signal generator 3; and a failure diagnosis device 4. The signal generator 3 gives a diagnostic signal to the detector 1 and inputs the measurement signal of the detector 1 to the failure diagnosis device 4 via the amplifier 2, and the failure diagnosis device 4 diagnoses the failure of the detector 1, and as a result When it is determined that there is a failure, the switch 5 is instructed to switch the detector and the detector is switched.
[0034]
By this means, the diagnostic signal generator 3 gives a diagnostic signal to the detector 1-1 at any time, so that the detector 1-1 outputs a signal based on the diagnostic signal to the fault diagnostic device 4 via the amplifier 2, When the failure diagnosis device 4 diagnoses the failure of the detector 1 and determines that it is a failure as a result, the switching device 5 is instructed to switch the detector 1-1 and the switching to the detector 1-2 is performed. Then, the failed detector 1-1 is disconnected and automatically switched to the spare detector 1-2.
[0035]
FIG. 5 is a diagram specifically showing the second embodiment of the present invention, in which the detectors 1-1 and 1-2 are coils of the same specification, one being a normal detector and the other being a common detector. Use a spare detector. The measurement signals of these detectors are the same as those in the first embodiment and are input to the switch 5. The switch 5 switches the measurement signal from the current detector to the spare detector and outputs it by a switching signal described later. The switch 5 outputs one of the switched measurement signals to the amplifier 2.
[0036]
The failure diagnosis apparatus 4 normally diagnoses the common detector 1-1 and, when it is determined as abnormal, immediately gives an on / off signal as a switching signal from the digital output unit 45 to the switching device 5, and the switching device 5 Switch to the spare detector.
[0037]
Next, the operation of the second embodiment of the present invention will be described.
[0038]
First, the detectors 1-1 and 1-2 are coils having the same specifications. For example, the detector 1-1 is used as the active device and the detector 1-2 is used as a spare. These measurement signals to be detected are the same as those in the first embodiment, and are input to the switch 5. When a switching signal, which will be described later, is input to the switching device 5, the relay 51 operates to switch the measurement signal from the current detector to the spare detector via the contacts 52, 53 and output it. The measurement signal of the switch 5 is input to the amplifier 2, and the subsequent operation is the same as that of the first embodiment.
[0039]
The failure diagnosis apparatus 4 normally diagnoses the current detector 1-1 and immediately switches the on / off signal as a switching signal from the digital output unit 45 when it is determined to be abnormal as in the first embodiment. The switch 5 switches the measurement signal to a spare detector. Thus, when an abnormality occurs in the current detector 1-1, the processor 42 switches to the spare detector 1-2 and notifies the result to the outside by the display unit 44.
[0040]
As described above, according to the second embodiment, the malfunction of the detector can be promptly known, and the inconvenience due to the abnormality of the detector is generated in the fusion apparatus that generates a constant value magnetic field for a long time. This can be avoided in advance. In addition, when a detector abnormality is detected, the detector is automatically switched to a spare detector, so that the operation can be interrupted or the interruption time can be minimized.
[0041]
FIG. 6 is a block configuration diagram of the magnetic field measurement apparatus of the fusion apparatus showing the third embodiment of the present invention.
[0042]
The third embodiment of the present invention is a magnetic field measurement device for a fusion apparatus, which includes a detector 1, an amplifier 2, a failure diagnosis device 4, a diagnosis signal generator 7, and a diagnosis magnetic field generator 8, and a diagnosis signal generator. 7 gives a diagnostic signal to the diagnostic magnetic field generator 8, and the change state of the measurement signal of the detector 1 based on the magnetic field by the diagnostic magnetic field generator 8 is input to the fault diagnostic device 4 via the amplifier 2, and fault diagnosis is performed. It is characterized in that the device 4 diagnoses a failure of the detector 1.
[0043]
By the above means, in the magnetic field measuring apparatus of the fusion apparatus, the diagnostic signal generator 7 gives a diagnostic signal to the diagnostic magnetic field generator 8, and the detector 1 detects the magnetic field generated thereby, and the measurement signal is output. The measurement signal is input to the failure diagnosis device 4 via the amplifier 2, and the failure diagnosis device 4 notifies the failure of the detector 1 by diagnosing the failure of the detector 1 from the change of the measurement signal.
[0044]
FIG. 7 is a diagram specifically showing the third embodiment of the present invention. The detector 1 is a coil, and a voltage signal v1 is generated at both ends of the coil by a change in the magnetic flux B interlinked with the coil. Output to 2. The amplifier 2 is a DC amplifier, and amplifies the voltage signal v1 to a signal level that can be input to the failure diagnosis apparatus 4 to obtain an amplified signal v2. The failure diagnosis apparatus 4 is a kind of data processing control apparatus mainly composed of a microcomputer and includes the following components.
[0045]
The fault diagnosis apparatus 4 receives an amplified signal v2 and exchanges it with a digital value, an analog input unit 41, a processor 42 for controlling data processing, a memory 43 for storing data, a display unit 44 for outputting data, and a control signal. It comprises a digital output section 45 and a bus 46 for connecting these sections.
[0046]
The failure diagnosis device 4 periodically outputs an on / off signal from the digital output unit 45, whereby the diagnosis signal generator 7 supplies a current as a diagnosis signal to the diagnostic magnetic field generator 8.
[0047]
Next, the operation of the third embodiment of the present invention will be described.
[0048]
The detector 1 is the same as that described in the first embodiment, and a voltage signal v1 which is a measurement signal is input to the amplifier 2.
[0049]
The configurations of the amplifier 2 and the failure diagnosis device 4 are substantially the same as those in the first embodiment, but the failure diagnosis device 4 periodically outputs an on / off signal from the digital output unit 45, whereby the diagnosis signal The generator 7 supplies current to a diagnostic magnetic field generator 8 installed in the vicinity of the detector 1. By performing this operation in the same section of magnetic flux B as described with reference to FIG. 3A, the detector 1 detects a change in the magnetic field when it is normal. For example, in the case of an abnormality such as disconnection of the detector. The magnetic field from the diagnostic magnetic field generator 8 cannot be detected. As a result, the processor 42 can know whether the detector 1 is normal or abnormal. This result is notified to the outside via the display unit 44.
[0050]
As described above, according to the third embodiment, since a magnetic field is periodically applied from the diagnostic magnetic field generator 8 to the detector 1 and the abnormality of the detector 1 is diagnosed from the change in the measurement signal by the detector 1, The abnormality of the detector can be known early and reliably, and the soundness of the detector can be maintained.
[0051]
FIG. 8 is a block configuration diagram of a magnetic field measurement apparatus of a nuclear fusion apparatus showing a fourth embodiment of the present invention.
[0052]
According to a fourth embodiment of the present invention, in a magnetic field measurement device of a fusion device, a plurality of detectors 1-1 and 1-2 and any one of measurement signals of the plurality of detectors 1-1 and 1-2 are used. A switching device 5 to be selected, an amplifier 2 for inputting a measurement signal of the selected detector, a diagnostic signal generator 7 and a failure diagnosis device 4 are provided, and a detector for which diagnostic signal generator 7 is not selected is used for diagnosis. A signal is given, and a change in the measurement signal of the detector selected by the magnetic field by the non-selected detector is input to the failure diagnosis device 4 via the amplifier 2, and the failure diagnosis device 4 changes based on the measurement signal. When the failure of the detector is diagnosed from the above, and it is determined as a result of the failure, the switching device 5 is instructed to switch the detector to switch to a non-selected detector.
[0053]
By the means described above, a diagnostic signal is given to the detector 1-2 in which the diagnostic signal generator 7 is not selected (assuming that the detector 1-1 is selected for explanation), and the magnetic flux generated thereby. The change is detected by the detector 1-1 and the change of the measurement signal is input to the failure diagnosis device 4 via the amplifier 2, and the failure diagnosis device 4 diagnoses the failure of the detector 1 from the change of the measurement signal. As a result, when it is determined that there is a failure, the switching device 5 is instructed to switch the detector 1-1 to perform switching to the detector 1-2, thereby disconnecting the failed current detector 1-1, The spare detector 1-2 is automatically switched to the current one.
[0054]
FIG. 9 is a diagram specifically illustrating the fourth embodiment of the present invention, and the configuration and operation relating to magnetic field detection are substantially the same as those of the third embodiment.
[0055]
In the fourth embodiment of the present invention, the failure diagnosis apparatus 4 periodically outputs a control signal Ic, which is an on / off signal, to the diagnosis signal generator 7, whereby the diagnosis signal generator 7 71 is operated to supply a current to the spare detector 1-2 not selected via the contacts 72 and 73 to generate a diagnostic magnetic field. As a result of the diagnosis, when it is determined that there is an abnormality, the relay 51 of the switching device 5 is switched to the spare detector 1-2 via the contacts 52 and 53. Even when there are two or more detectors, the same switching is performed between the current detector 1-N and the other spare detector 1-M.
[0056]
In this case, N and M described above are 1 <N or M <I (total number of detectors), or 1 = N or M = I, where N and M are not the same number.
[0057]
For example, when four detectors 1-1 to 1-4 are prepared, detector 1-1 is initially used, and detectors 1-2, 1-3, and 1-4 are sequentially reserved. When switching to the predetermined first spare detector 1-2, the detector 1-2 is made active, the detector 1-3 is made the first spare, and sequentially switched to the spare detector. Like that.
[0058]
The operation of the fourth embodiment will be described with reference to FIG.
[0059]
The configuration, operation, and operation until generation of a diagnostic signal relating to magnetic field detection are substantially the same as those in the third embodiment, but the signal diagnostic signal generator 7 is connected to the detector 1-2 as a diagnostic magnetic field generator. On the other hand, a current is supplied for diagnosis of the detector 1-1. In this case, the magnetic flux penetrating through the nearby detector 1-1 changes due to a change in the current flowing to the detector 1-2. This is performed in the same section of the magnetic flux B as described in FIG. As a result, the failure diagnosis device 4 diagnoses the detector 1-1 from the change state of the measurement signal. That is, when the detector 1-1 is normal, the change of the magnetic field is detected, and the failure diagnosis apparatus 4 can know whether the detector 1-1 is abnormal or normal. Notification to the outside and detector switching are performed in substantially the same manner as in the second embodiment.
[0060]
Thus, according to the fourth embodiment, it is possible to know the abnormality or normality of the detector from the change in the measurement signal of the selected detector by supplying the current to the unselected detector. In addition, it is possible to immediately switch to the spare detector accurately. Therefore, the operation of the fusion device is not stopped.
[0061]
FIG. 10 is a block configuration diagram of a magnetic field measurement apparatus of a nuclear fusion apparatus showing a fifth embodiment of the present invention.
[0062]
The fifth embodiment of the present invention is a magnetic field measurement apparatus for a nuclear fusion apparatus, which includes a driving device 9 for driving a detector in the means of the second embodiment, and is the same as the means of the second embodiment. It is characterized in that when the detector is switched, the newly selected detector is moved to the same measurement position as the detector before the switching by the driving device 9.
[0063]
With the above-described means, the detector is driven when the current detector 1-1 that has failed by the switch 5 is switched to the spare detector 1-2 in the same diagnostic operation as in the second embodiment. Since the apparatus 9 moves the spare detector 1-2 to the measurement position of the current detector 1-1, the magnetic field value can be measured under the same conditions before and after the detector switching. .
[0064]
FIG. 11 is a diagram specifically showing the fifth embodiment of the present invention, and the configuration and operation related to magnetic field detection and diagnosis, and further switching of the detector are the same as those of the second embodiment shown in FIG. FIG. 5 is different from FIG. 5 in that a driving device 9 is added. That is, when switching from the current detector 1-1 to the spare detector 1-2 occurs, the detector driving device 9 is moved to switch the spare detector 1-2 before switching the spare detector 1-1. Moves to the position where the measurement was taking place. When there are two or more detectors, the same switching is generally performed between the detectors 1-N and 1-M.
[0065]
In this case, N and M described above are 1 <N or M <I (total number of detectors), or 1 = N or M = I, where N and M are not the same number.
[0066]
For example, when four detectors 1-1 to 1-4 are prepared, detector 1-1 is initially used, and detectors 1-2, 1-3, and 1-4 are sequentially reserved. When switching to the predetermined first spare detector 1-2, the detector 1-2 is made active, the detector 1-3 is made the first spare, and sequentially switched to the spare detector. Like that.
[0067]
Next, the operation of the fifth embodiment will be described with reference to FIG.
[0068]
The configuration and operation related to magnetic field detection and the operation up to the switching of the detector are the same as those in the second embodiment shown in FIG. 5, but the following operations are also performed at the same time when the detector is switched. The current detector 1-1 and the spare detector 1-2 are moved in conjunction with each other by the detector driving device 9 and adjusted to the same measurement position as before the switching of the current detector 1-1. Thereby, the measurement position and direction of the magnetic field accompanying the switching of the detector are changed, and a complicated process for obtaining the magnetic field distribution becomes unnecessary.
[0069]
For example, as shown in FIG. 12, the current detector 1-1 and other spare detectors 1-2, 1-3, and 1-4 are arranged on a concentric circle, and this rotating disk is driven by the detector driving device 9. 11 is rotated around the center 10. Accordingly, the detectors can be moved by sequentially moving the spare detectors 1-2, 1-3, and 1-4 to the position of the active detector 1-1.
[0070]
As described above, according to the fifth embodiment, as in the second embodiment, the abnormality of the detector can be determined at an early stage and accurately. Further, according to the embodiment of the present invention, the current detector can be determined. Since the spare detector can be moved to the position, processing such as correction due to different measurement conditions becomes unnecessary.
[0071]
FIG. 13: is a block block diagram of the magnetic field measuring apparatus of the nuclear fusion apparatus which shows 6th Embodiment of this invention.
[0072]
The sixth embodiment of the present invention is a magnetic field measurement device for a fusion apparatus, which includes a detector 1, an amplifier 2, a failure diagnosis device 4, a diagnosis signal generator 7, and a detector drive device 9, and generates a diagnosis signal. The device 7 gives a diagnostic signal to the detector drive device 9 and inputs the change of the measurement signal of the detector 1 to the failure diagnosis device 4 via the amplifier 2, and the failure diagnosis device 4 outputs the measurement signal of the detector 1. It is characterized by diagnosing a failure from a change state.
[0073]
By the above means, the diagnostic signal generator 7 gives a diagnostic signal to the detector driving device 9 as in the third embodiment shown in FIG. As a result, the detector drive device 9 is activated, and the position of the detector 1 changes, and the change signal of the measurement signal detected by the detector 1 that detects the magnetic flux is input to the failure diagnosis device 4 via the amplifier 2. The failure diagnosis device 4 notifies the failure of the detector 1 by diagnosing the failure from the measurement signal of the detector 1.
[0074]
FIG. 14 is a diagram specifically showing the sixth embodiment of the present invention. The configuration and operation relating to magnetic field detection are the same as those of the third embodiment shown in FIG. 7, and the diagnostic magnetic field of FIG. In this configuration, a detector driving device 9 is arranged instead of the generator 8. The failure diagnosis device 4 periodically outputs an on / off signal to the diagnosis signal generator 7, and the diagnosis signal generator 7 supplies a current to the detector drive device 9 to move the drive device. ing.
[0075]
Next, the operation of the sixth embodiment will be described with reference to FIG.
[0076]
The configuration, operation, and operation up to generation of a diagnostic signal related to magnetic field detection are the same as those in the third embodiment shown in FIG. When a diagnostic signal is input from the diagnostic signal generator 7, the detector driving device 9 moves the detector 1 slightly from the normal measurement position by a rotational motion or the like. Thereby, the magnetic flux B which penetrates the detector 1 changes. This is performed in the same section of the magnetic flux B as described in FIG. The detector 1 detects a change in the magnetic field when it is normal, and cannot detect a change in magnetic flux predicted from the motion made by the driving device 9 and the value of the magnetic flux B when it is abnormal. Therefore, the failure diagnosis apparatus 4 can know whether the detector 1 is abnormal or normal.
[0077]
Thus, according to the sixth embodiment, the soundness of the detector 1 can be diagnosed from the change in the measurement signal that accompanies a slight movement of the detector 1. Therefore, it can be determined early and surely whether the detector 1 is normal or abnormal.
[0078]
In the above-described embodiment of the present invention, the case where the normal / abnormal diagnosis result of the detector is notified by the display unit has been described. However, other means, for example, transmission to a remote unit by telecommunications, voice notification Etc. can also be used. Further, in the second embodiment, the case where there is one spare detector has been described, but the same effect can be obtained when two or more spare detectors are used. Furthermore, in the above description, the case where the detector is a coil has been described. However, the present invention is also effective for other types of detectors, for example, a magnetic field detector using the Hall effect.
[0079]
【The invention's effect】
  As described above, according to the invention of claim 1,When a diagnostic signal is given to the spare detector, the normality or abnormality of the detector is diagnosed from the change state of the measurement signal of the current detector, and the abnormality of the detector is diagnosed. Since the switching is performed, it is possible to quickly and surely switch to the alternative detector, and the apparatus is not temporarily interrupted, so that it is not necessary to replace the detector.
[0080]
  Moreover, according to the invention which concerns on Claim 2,Since the position of the spare detector is driven to be the position of the active detector and switched to the spare detector, the measurement conditions can be made the same even when switching to the spare detector. This eliminates the need for troublesome processing associated with the change of, and enables accurate measurement.
[Brief description of the drawings]
FIG. 1 is a block configuration diagram of a magnetic field measurement apparatus of a nuclear fusion apparatus showing a first embodiment of the present invention.
FIG. 2 is a diagram illustrating a specific configuration of FIG. 1;
FIG. 3 is a timing chart showing the operation of FIG.
FIG. 4 is a block configuration diagram of a magnetic field measurement apparatus of a fusion apparatus showing a second embodiment of the present invention.
5 is a diagram showing a specific configuration of FIG. 4;
FIG. 6 is a block configuration diagram of a magnetic field measurement device of a nuclear fusion device showing a third embodiment of the present invention.
7 is a diagram showing a specific configuration of FIG. 6;
FIG. 8 is a block configuration diagram of a magnetic field measurement device of a nuclear fusion device showing a fourth embodiment of the present invention.
9 is a diagram showing a specific configuration of FIG.
FIG. 10 is a block configuration diagram of a magnetic field measuring apparatus of a nuclear fusion apparatus showing a fifth embodiment of the present invention.
11 is a diagram showing a specific configuration of FIG.
12 is a detector arrangement diagram showing the operation of FIG. 10; FIG.
FIG. 13 is a block configuration diagram of a magnetic field measurement apparatus of a fusion apparatus showing a sixth embodiment of the present invention.
14 is a diagram showing a specific configuration of FIG. 13;
FIG. 15 is a block diagram showing a magnetic field measurement device of a conventional fusion device.
[Explanation of symbols]
1 Detector
1-1 Current detector
1-2 Spare detector
2 Amplifier
3 Diagnostic signal generator
4 Fault diagnosis device
7 Diagnostic signal generator
8 Magnetic field generator for diagnosis
9 Detector drive unit
41 Analog input section
42 processor
43 memory
44 display
45 Digital output section
46 bus

Claims (2)

Multiple detectors that output measurement signals obtained by measuring the magnitude of the magnetic field value, one of these detectors as the current detector, the other as the spare detector, and depending on the current detector When a switching signal is input while a measurement signal is selectively output, switching is performed so that the measurement signal of a spare detector is selectively output, and a switch with the spare detector as a current detector, and a current detector as needed A diagnostic signal for diagnosing the spare detector is provided to the spare detector while a diagnostic signal for diagnosing the spare detector as an active detector is provided to the other spare detector by the switching signal. A generator, an amplifier for amplifying a signal based on the diagnostic signal output from the current detector and outputting an amplified signal when the diagnostic signal is given to the spare detector; and From the change state When diagnosing the abnormality of detectors, field measuring apparatus of a nuclear fusion device, characterized in that it comprises a diagnosis device and for outputting the switching signal. Multiple detectors that output measurement signals obtained by measuring the magnitude of the magnetic field value, one of these detectors as the current detector, the other as the spare detector, and depending on the current detector When a switching signal is input while a measurement signal is selectively output, a switch that switches to selectively output the measurement signal of the detector that has become the active detector, using the spare detector as the current detector, and A diagnostic signal generator for providing a diagnostic signal to a detector to be a current detector; an amplifier for amplifying a signal based on the diagnostic signal and outputting an amplified signal when the diagnostic signal is provided; and the amplification When an abnormality of the current detector is diagnosed from a change state of a signal, a diagnostic device that outputs the switching signal to the switch, and the switching signal output by the diagnostic device is taken in and the current detector The preliminary detection at the measurement position. Field measuring apparatus of a nuclear fusion apparatus vessel moves the measurement position of the preliminary detector is characterized in that a said current of replacing such that the measurement position of the detector drive.

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