WO2016103634A1 - 監視システム、監視方法、および監視用プログラムが記憶された記憶媒体 - Google Patents
監視システム、監視方法、および監視用プログラムが記憶された記憶媒体 Download PDFInfo
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- WO2016103634A1 WO2016103634A1 PCT/JP2015/006249 JP2015006249W WO2016103634A1 WO 2016103634 A1 WO2016103634 A1 WO 2016103634A1 JP 2015006249 W JP2015006249 W JP 2015006249W WO 2016103634 A1 WO2016103634 A1 WO 2016103634A1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
- H04B17/18—Monitoring during normal operation
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
- H03F1/0216—Continuous control
- H03F1/0222—Continuous control by using a signal derived from the input signal
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/211—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/60—Amplifiers in which coupling networks have distributed constants, e.g. with waveguide resonators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/299—Signal waveform processing, e.g. reshaping or retiming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/695—Arrangements for optimizing the decision element in the receiver, e.g. by using automatic threshold control
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/102—A non-specified detector of a signal envelope being used in an amplifying circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/39—Different band amplifiers are coupled in parallel to broadband the whole amplifying circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/432—Two or more amplifiers of different type are coupled in parallel at the input or output, e.g. a class D and a linear amplifier, a class B and a class A amplifier
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
Definitions
- the present invention relates to a monitoring system, a monitoring method, and a storage medium in which a monitoring program for monitoring a change in characteristics of a characteristic measurement target device is stored.
- Radio Frequency (RF) signal There is an amplification detector that amplifies and detects a radio frequency signal (Radio Frequency (RF) signal).
- RF Radio Frequency
- the output characteristics of an amplification detector vary depending on the frequency, temperature during measurement, aging, and the like.
- FIG. 7 is a block diagram showing a configuration example of a monitoring system for measuring the output characteristics of the amplification detector.
- input signals Sa to Sn are input to the amplification detectors 3a to 3n, respectively.
- the amplification detectors 3a to 3n input detection signals obtained by amplifying and detecting the input signals Sa to Sn input to the monitoring circuits 4a to 4n, respectively.
- Each of the monitoring circuits 4a to 4n inputs monitoring result signals Ma to Mn indicating monitoring results based on the input detection signal to the control unit 9.
- Patent Document 1 describes a method of shaping a waveform of a transmission output signal generated by a signal generator and distributed by a distributor to each amplifier and amplifying the waveform of a transmission output signal into a predetermined waveform.
- the method described in Patent Document 1 is considered to be used for calibration of an amplifier that amplifies a signal to be monitored.
- Patent Document 2 describes a device in which an analog multiplexer switches a signal input to a monitoring circuit that outputs a signal of a voltage corresponding to a measurement result of a sensor circuit between a monitoring target signal and a reference signal. ing.
- JP 2013-251823 A Japanese Patent Laid-Open No. 11-64135
- the amplification detectors 3a to 3n and the monitoring circuits 4a to 4n must be prepared according to the input signals Sa to Sn, respectively. Therefore, when there are n input signals, it is necessary to prepare n amplification detectors and n monitoring circuits, respectively, and there is a problem that installation and maintenance are costly and troublesome.
- the monitoring target signal is input during the operation of the amplification detectors 3a to 3n, and the calibration is performed during the calibration of the amplification detectors 3a to 3n.
- a reference signal is input.
- the operation of switching the input signals Sa to Sn between the monitoring target signal and the reference signal is performed manually, for example. Then, it is difficult to switch quickly, and there is a problem that when the amplification detectors 3a to 3n are calibrated, the operation of the amplification detectors 3a to 3n must be stopped for a long time.
- Patent Document 2 uses an analog multiplexer for switching the input signal from the sensor circuit.
- a high-frequency input signal such as a radio frequency signal is appropriately switched. I can't.
- the present invention provides a monitoring system, a monitoring method, and a monitoring program capable of monitoring a change in characteristics of a characteristic measurement target device to which a high-frequency signal is input without stopping operation for a long time.
- An object is to provide a stored storage medium.
- a monitoring target signal and a reference signal are input, and input means for inputting any one of the input signals to the characteristic measurement target device, and characteristics when the reference signal is input
- the input / output characteristic calculation means for calculating the input / output characteristic of the characteristic measurement target device, and the monitoring target signal is input based on the calculation result of the input / output characteristic calculation means. Whether or not the device is out of order based on the correction result signal generated by the correction result generator and the correction result signal generated by the correction result generator.
- a failure determination means for determining the above.
- a monitoring target signal and a reference signal are input, an input step for inputting any one of the input signals to the characteristic measurement target device, and a characteristic when the reference signal is input.
- the input / output characteristic calculation step for calculating the input / output characteristic of the characteristic measurement target device, and the monitoring target signal is input based on the calculation result in the input / output characteristic calculation step Whether or not the device is out of order based on the correction result generation step for generating the correction result signal indicating the result of correcting the output signal of the target device for characteristic measurement and the correction result signal generated in the correction result generation step.
- a correction result generation step of generating a correction result signal that can be determined.
- the storage medium storing the monitoring program according to the present invention inputs any one of the input signals to the characteristic measurement target device to the input means for inputting the monitoring target signal and the reference signal to the computer.
- Input / output characteristic calculation processing for calculating the input / output characteristics of the target device for characteristic measurement based on the input processing to be performed, the output signal of the target device for characteristic measurement when the reference signal is input, and the reference signal Based on the calculation result of the process, it shows the result of correcting the output signal of the characteristic measurement target device when a monitoring target signal is input, and generates a correction result signal that can determine whether the device is faulty
- a monitoring program characterized by executing a result generation process is stored.
- the present invention it is possible to monitor a change in characteristics of a characteristic measurement target device to which a high-frequency signal is input without stopping the operation for a long time.
- FIG. 1 is a block diagram illustrating a configuration example of a monitoring system 100 according to the first embodiment of this invention.
- the monitoring system 100 according to the first embodiment of the present invention includes a multiplexer 2, a monitoring circuit 4, and a synchronization signal generator 5.
- the multiplexer 2 is an RF switch, for example.
- the multiplexer 2 of this example is provided with 12 input signal input terminals 2i-1 to 2i-12 and one output terminal 2o.
- the monitoring target signals are input to the input terminals 2i-1 to 2i-9, respectively.
- the standard signal generator 1 is connected to the input terminal 2i-10, and the standard signal generated by the standard signal generator 1 is input.
- the standard signal generator 1 is connected to the input terminals 2i-11 via the attenuator 6, and the standard signal generated by the standard signal generator 1 is attenuated by the attenuator 6 and input.
- the attenuator 6 attenuates the standard signal by 6 dB.
- the input terminal 2i-12 is connected to a ground level terminal. In this example, it is assumed that the input terminal 2i-12 is connected to a ground level terminal via an electric resistance.
- the multiplexer 2 outputs the signal input to any one of the input terminals 2i-1 to 2i-12 from the output terminal 2o in accordance with the synchronization signal input by the synchronization signal generator 5. Then, the signal output from the output terminal 2 o of the multiplexer 2 is input to the amplification detector 3.
- the amplification detector 3 includes an amplifier that amplifies the input signal and a detector that detects the signal amplified by the amplifier. Therefore, the amplification detector 3 generates a detection signal obtained by amplifying and detecting the signal output from the multiplexer 2 and inputs the detection signal to the monitoring circuit 4.
- the detector inputs, for example, a detection signal corresponding to the result of LOG detection of the signal amplified by the amplifier to the monitoring circuit 4.
- the monitoring circuit 4 generates a monitoring result signal indicating a monitoring result based on the detection signal input by the amplification detector 3.
- the monitoring circuit 4 is realized by, for example, a computer that executes processing according to program control or a plurality of circuits.
- the synchronization signal generator 5 generates a synchronization signal that synchronizes the switching timing of the output signal in the multiplexer 2 and the generation timing of the monitoring result signal by the monitoring circuit 4 at a predetermined time interval. Then, the synchronization signal generator 5 inputs the generated synchronization signal to the multiplexer 2 and the monitoring circuit 4.
- the synchronization signal generator 5 determines whether or not the amplification detector 3 is normally operated based on the monitoring result signal, and transmits the signals input to the input terminals 2i-1 to 2i-12 of the multiplexer 2. It is determined whether or not the source, route, etc. are operating normally. Then, the synchronization signal generator 5 generates a notification signal according to the determination result.
- FIG. 2 is an explanatory diagram illustrating an example of signals input / output in the multiplexer 2.
- the multiplexer 2 is provided with, for example, input terminals 2s-1 to 2s-12 for synchronization signals corresponding to the input terminals 2i-1 to 2i-12.
- a synchronization signal is input to each of the input terminals 2s-1 to 2s-12.
- rectangular-wave synchronization signals are sequentially input to the input terminals 2s-1 to 2s-12.
- FIG. 2 is an explanatory diagram illustrating an example of signals input / output in the multiplexer 2.
- the multiplexer 2 is provided with, for example, input terminals 2s-1 to 2s-12 for synchronization signals corresponding to the input terminals 2i-1 to 2i-12.
- a synchronization signal is input to each of the input terminals 2s-1 to 2s-12.
- rectangular-wave synchronization signals are sequentially input to the input terminals 2s-1 to 2s-12.
- an RF switch having a plurality of input terminals is prepared as the multiplexer 2.
- an on-state synchronization signal is input to any of the input terminals 2s-1 to 2s-12
- input terminals corresponding to the input terminals 2s-1 to 2s-12 to which the on-state synchronization signal is input 2i-1 to 2i-12 and the output terminal 2o are electrically connected.
- the on-state synchronization signal is being input to the input terminals 2s-1 to 2s-12
- the signals input to the corresponding input terminals 2i-1 to 2i-12 are output from the output terminal 2o. Since the input terminal 2i-12 is connected to a ground level terminal, the output terminal 2o becomes a ground level potential when an on-state synchronization signal is input to the corresponding input terminal 2s-12. .
- an ON state synchronization signal is input to each of the input terminals 2s-1 to 2s-12, for example, at intervals of 0.5 seconds. Then, with 0.5 seconds as one cycle, the input signals input to the input terminals 2i-1 to 2i-12 are sequentially and periodically output from the output terminal 2o.
- FIG. 3 is an explanatory diagram showing the relationship between the input signal and the output signal in the amplification detector 3.
- the 0 dB signal input to the input terminal 2i-10 of the multiplexer 2 the -6 dB signal input to the input terminal 2i-11, and the input terminal 2i-12 are electrically connected to the ground terminal. And a signal corresponding to the case of being connected to.
- Signals input to these input terminals 2i-10 to 2i-12 are reference signals.
- the monitoring target signals input to the input terminals 2i-1 to 2i-9 are corrected (calibrated) according to a calculation result described later, which is calculated based on the reference signal, and is output.
- the amplifier amplifies the input signals with a predetermined amplification factor, and the detector generates a detection signal obtained by detecting the amplified signal. Therefore, the output signal is a detection signal obtained by detecting the amplified signal.
- the monitoring circuit 4 sets the relationship between the input signal level and the output signal level in the amplification detector 3 to the least square method according to the synchronization signal input by the synchronization signal generator 5 and the voltage value of each input detection signal. Based on this, an approximate expression is derived as a linear function.
- the monitoring circuit 4 determines the synchronization signal input by the synchronization signal generator 5 and the voltage value of each input detection signal.
- the monitoring circuit 4 is an output signal output from the amplification detector 3 in accordance with a signal input to any of the input terminals 2i-10 to 2i-12 in the multiplexer 2 based on the input synchronization signal. Can be specified.
- the monitoring circuit 4 derives an approximate expression of the relationship between the three signals input to the input terminals 2i-10 to 2i-12 and the three output signals output from the amplification detector 3.
- n 3.
- x 1 to x 3 are 0 according to ⁇ dB, 0.775 according to ⁇ 6 dB, and 1.55 according to 0 dB, respectively.
- the relationship between the design input signal level and the output signal level of the amplification detector 3 of this example is It is.
- the relationship shown in Expression (5) is shown by a solid line in FIG.
- the monitoring circuit 4 corrects (calibrates) the output value y of the amplification detector 3 to the output value Y using the following equation (6) based on the above-described equations (4) and (5). .
- y 1.43 (the third decimal place is rounded off).
- Y 2.82 (rounded to the second decimal place).
- the monitoring circuit 4 inputs a monitoring result signal indicating the calculated output value Y to the synchronization signal generator 5.
- the synchronization signal generator 5 is input to any of the input terminals 2i-1 to 2i-12 in the multiplexer 2 based on the output value Y indicated by the input monitoring result signal and the output timing of the synchronization signal. It is determined whether the output value Y corresponds to the signal.
- the synchronization signal generator 5 determines whether each device has failed based on the determination result. Specifically, for example, at the timing when the synchronization signal is input to the synchronization signal input terminal 2s-10 corresponding to the input terminal 2i-10 to which the standard signal of 0 dB is input, the synchronization signal generator 5 is output. A monitoring result signal indicating that the value Y is 5.0 V or a value close thereto should be input. However, at such timing, for example, when a monitoring result signal indicating that the output value Y is not close to 5.0 V, such as 2.0 V, is input, the synchronization signal generator 5 has a fault. A notification signal for notifying the occurrence is generated and output.
- the range of the output value Y corresponding to the timing when the synchronization signal is input to the synchronization signal input terminals 2s-1 to 2s-12 is set in advance in the synchronization signal generator 5, for example.
- a notification signal is generated and output to the synchronization signal generator 5.
- the monitoring target signal and the failure determination signal are repeatedly input to the multiplexer 2, and the multiplexer 2 switches the signal to be input to the amplification detector 3 at high speed, so that the operation using the monitoring target signal is performed. Can be determined without stopping for a long time. For example, even if calibration must be performed within 1 second in operation, in this example, calibration and monitoring are performed with 0.5 second as one cycle. None stop.
- the monitoring circuit 4 follows the change and the input signal level and the output signal level in the amplification detector 3 are changed. Is updated and the calculation formula of the output value Y is updated, so that it is possible to continuously monitor the failure with high accuracy. If the frequency generated by the standard signal generator 1 is changed according to the frequency of the monitoring target signal, failure monitoring based on the monitoring target signal of various frequencies can be performed.
- the amplification detectors 3a to 3n and the monitoring circuits 4a to 4n are prepared for the input signals Sa to Sn, respectively.
- the multiplexer 2 since the multiplexer 2 is arranged on the upstream side of the amplification detector 3, it is sufficient to prepare one amplification detector 3 and one monitoring circuit 4. Then, the cost and labor of installation and maintenance can be saved. In addition, the power consumption, volume, and dimensions of the entire system including the amplification detector 3 can be reduced.
- for calibration of the amplification detector if the amplification detector 3 is calibrated, each input signal is calibrated, so that the calibration cost can be reduced well. be able to. And since the number of apparatus to comprise can be reduced, the failure rate as a system can be reduced favorably.
- the DC offset of the output signal of the amplification detector 3 is set. It can be easily detected.
- the standard signal generator 1 has a function of generating a standard signal with sufficiently high accuracy. Specifically, the standard signal generator 1 has a function of generating a standard signal having a signal intensity change amount of ⁇ 10 to + 55 ° C. of 0.2 dB or less in a frequency band of 108 to 118 MHz, for example.
- the input terminals 2i-1 to 2i-9 are input with signals based on radio waves emitted by an instrument landing device (ILS) for guiding an aircraft at an airport, for example.
- ILS instrument landing device
- a signal received by an antenna (FFM: Far Field Monitor) provided at a location far from the emission position of the radio wave is input to the input terminal 2i-1.
- a signal received by an antenna (NFM: Near Field Monitor) provided near a position where the radio wave is emitted is input to the input terminal 2i-2.
- a signal input to the antenna for emitting the radio wave is branched and input to the input terminal 2i-3.
- a failure of the monitoring antenna is detected based on the output value Y corresponding to the signal input to each of the input terminals 2i-1 and 2i-2, or the input terminals 2i-1 to 2i are detected. Based on the output value Y corresponding to the signal input to -3, it is possible to quickly detect the failure of the radio wave emission source.
- the degree of modulation of emitted radio waves SDM: Sum of Depth of Modulation
- the difference in the degree of modulation of radio waves with different modulation frequencies Difference in Depth of Modulation
- the monitoring circuit 4 is configured to output a calibrated output value Y corresponding to the change.
- the detection signal output by can be monitored with higher accuracy.
- FIG. 4 is a block diagram illustrating a configuration example of a monitoring system with improved reliability.
- two sets of the standard signal generator 1, the amplification detector 3, and the monitoring circuit 4 shown in FIG. 1 are connected in parallel to the multiplexer 2, the synchronous signal generator 5, and the attenuator 6. Yes.
- the signal generated by any pair of standard signal generators 1 is connected to one set 101 of the amplification detector 3 and the monitoring circuit 4 via the branch switch 8 and the multiplexer 2. It is input to at least one of the other set 102.
- the amplification detector 3 and the monitoring circuit 4 are made redundant, and the reliability can be improved.
- a highly reliable PIN (P-Intrinsic-N) diode is used for the multiplexer 2 and the two-branch switch 8, and therefore, in the example shown in FIG. 4, the multiplexer 2 and the two-branch switch 8 are made redundant. Not.
- FIG. 5 is a block diagram showing a configuration example of a monitoring system with higher reliability.
- two sets of the standard signal generator 1, the amplification detector 3, the monitoring circuit 4, and the attenuator 6 shown in FIG. 1 are connected to the synchronous signal generator 5 in parallel.
- the monitoring target signal is input to one set 103 and the other set 104 of the standard signal generator 1, the multiplexer 2, the amplification detector 3, the monitoring circuit 4, and the attenuator 6. Further, each monitoring target signal is distributed to one set 103 and the other set 104 according to a distributor (not shown) prepared according to each monitoring target signal, for example.
- the reliability can be further increased.
- FIG. 6 is a block diagram illustrating a configuration example of the monitoring system 10 according to the second embodiment of this invention.
- the monitoring system 10 according to the second embodiment of the present invention includes an input unit 11, an input / output characteristic calculation unit 12, a correction result generation unit 13, and a failure determination unit 14.
- the input unit 11 corresponds to, for example, the multiplexer 2 shown in FIG.
- the input / output characteristic calculation unit 12 and the correction result generation unit 13 correspond to, for example, the monitoring circuit 4 illustrated in FIG.
- the failure determination unit 14 corresponds to, for example, the synchronization signal generator 5 illustrated in FIG.
- the input unit 11 receives the monitoring target signal and the reference signal, and inputs any one of the input signals to the characteristic measurement target device 15.
- the characteristic measurement target device 15 corresponds to, for example, the amplification detector 3 shown in FIG.
- the input / output characteristic calculation unit 12 calculates the input / output characteristic of the characteristic measurement target device 15 based on the output signal of the characteristic measurement target device 15 and the reference signal when the reference signal is input.
- the correction result generation unit 13 generates a correction result signal indicating a result of correcting the output signal of the characteristic measurement target device 15 when the monitoring target signal is input based on the calculation result by the input / output characteristic calculation unit 12.
- the failure determination unit 14 determines whether or not the device has failed based on the correction result signal generated by the correction result generation unit 13.
- the present embodiment it is possible to monitor a change in characteristics of a characteristic measurement target device to which a high-frequency signal is input without stopping the operation for a long time.
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Abstract
Description
本発明の第1の実施形態の監視システム100について、図面を参照して説明する。図1は、本発明の第1の実施形態の監視システム100の構成例を示すブロック図である。図1に示すように、本発明の第1の実施形態の監視システム100は、マルチプレクサ2、監視回路4、および同期信号発生器5を含む。
本発明の第2の実施形態について、図面を参照して説明する。図6は、本発明の第2の実施形態の監視システム10の構成例を示すブロック図である。図6に示すように、本発明の第2の実施形態の監視システム10は、入力部11、入出力特性算出部12、補正結果生成部13、および故障判定部14を含む。
2i-1~2i-12、2s-1~2s-12 入力端子
2o 出力端子
3、3a~3n 増幅検波器
4、4a~4n 監視回路
5 同期信号発生器
6 アッテネータ
8 2分岐スイッチ
9 制御部
10、100 監視システム
11 入力部
12 入出力特性算出部
13 補正結果生成部
14 故障判定部
15 特性測定対象機器
101、102、103、104 組
Sa~Sn 入力信号
Claims (8)
- 監視対象信号と参照信号とが入力され、入力された信号のうちいずれか1つの信号を特性測定対象機器に入力する入力手段と、
前記参照信号が入力された場合の前記特性測定対象機器の出力信号と前記参照信号とに基づいて、前記特性測定対象機器の入出力特性を算出する入出力特性算出手段と、
前記入出力特性算出手段による算出結果に基づいて、前記監視対象信号が入力された場合の前記特性測定対象機器の出力信号を補正した結果を示す補正結果信号を生成する補正結果生成手段と、
前記補正結果生成手段が生成した前記補正結果信号に基づいて、機器が故障しているか否かを判定する故障判定手段とを備えた
ことを特徴とする監視システム。 - 前記入力手段は、当該監視システムに運用上許容されている時間よりも短いサイクルで、前記特性測定対象機器に入力する信号を切り替える
請求項1に記載の監視システム。 - 前記参照信号は、第1参照信号と、信号レベルが前記第1参照信号とは異なる第2参照信号と、信号レベルが前記第1参照信号および前記第2参照信号とは異なる第3参照信号とを含み、
前記入出力特性算出手段は、前記第1参照信号、前記第2参照信号、および前記第3参照信号のそれぞれが入力された場合の前記特性測定対象機器のそれぞれの出力信号と前記第1参照信号、前記第2参照信号、および前記第3参照信号とに基づいて、前記特性測定対象機器の入出力特性を算出する
請求項1または請求項2に記載の監視システム。 - 前記第1参照信号の信号レベルは0dBであり、前記第2参照信号の信号レベルは-6dBであり、前記第3参照信号の信号レベルはグラウンドレベルである
請求項3に記載の監視システム。 - 前記故障判定手段は、前記補正結果信号が示す補正結果の値が所定の範囲外である場合に、機器が故障していると判定する
請求項1から請求項4のうちいずれかに記載の監視システム。 - 前記特性測定対象機器を含む
請求項1から請求項5のうちいずれかに記載の監視システム。 - 監視対象信号と参照信号とが入力され、入力された信号のうちいずれか1つの信号を特性測定対象機器に入力させ、
前記参照信号が入力された場合の前記特性測定対象機器の出力信号と前記参照信号とに基づいて、前記特性測定対象機器の入出力特性を算出し、
前記入出力特性の算出結果に基づいて、前記監視対象信号が入力された場合の前記特性測定対象機器の出力信号を補正した結果を示す補正結果信号を生成し、
生成した前記補正結果信号に基づいて、機器が故障しているか否かを判定可能な補正結果信号を生成する
ことを特徴とする監視方法。 - コンピュータに、
監視対象信号と参照信号とが入力される入力手段に、入力された信号のうちいずれか1つの信号を特性測定対象機器に入力させる入力処理と、
前記参照信号が入力された場合の前記特性測定対象機器の出力信号と前記参照信号とに基づいて、前記特性測定対象機器の入出力特性を算出する入出力特性算出処理と、
前記入出力特性算出処理の算出結果に基づいて、前記監視対象信号が入力された場合の前記特性測定対象機器の出力信号を補正した結果を示し、機器が故障しているか否かを判定可能な補正結果信号を生成する補正結果生成処理とを実行させる
ための監視用プログラムが記憶された記憶媒体。
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