JP5451273B2 - Power monitoring circuit, power monitoring method and power monitoring control program used in the power monitoring circuit, and electronic device - Google Patents

Power monitoring circuit, power monitoring method and power monitoring control program used in the power monitoring circuit, and electronic device Download PDF

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JP5451273B2
JP5451273B2 JP2009208711A JP2009208711A JP5451273B2 JP 5451273 B2 JP5451273 B2 JP 5451273B2 JP 2009208711 A JP2009208711 A JP 2009208711A JP 2009208711 A JP2009208711 A JP 2009208711A JP 5451273 B2 JP5451273 B2 JP 5451273B2
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俊章 赤澤
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NEC Computertechno Ltd
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Description

この発明は、電源監視回路、該電源監視回路に用いられる電源監視方法及び電源監視制御プログラム、並びに電子機器に係り、たとえば、コンピュータ装置などに供給される電源電圧を監視する場合に用いて好適な電源監視回路、該電源監視回路に用いられる電源監視方法及び電源監視制御プログラム、並びに電子機器に関する。   The present invention relates to a power supply monitoring circuit, a power supply monitoring method and a power supply monitoring control program used in the power supply monitoring circuit, and an electronic device, and is suitable for use in, for example, monitoring a power supply voltage supplied to a computer device or the like. The present invention relates to a power monitoring circuit, a power monitoring method and a power monitoring control program used in the power monitoring circuit, and an electronic device.

コンピュータ装置などでは、内部に実装されるボード（回路基板）に供給される電源電圧が、電源監視回路により監視されている。この場合、たとえば、電圧センサにより電源電圧が読み出され、その電圧値が電圧監視回路に設定された正常電圧範囲から外れるが否かが判定され、外れる場合に電源異常の旨が報告される。また、ボードに使用されているＩＣなどの正常動作を保証する定格電圧範囲が電圧監視回路に設定され、同電圧監視回路で電源異常が検出された場合に、予備電源に切り替えられるか、あるいは、電源の供給が停止されるようになっている。   In a computer device or the like, a power supply voltage supplied to a board (circuit board) mounted therein is monitored by a power supply monitoring circuit. In this case, for example, the power supply voltage is read by the voltage sensor, and it is determined whether or not the voltage value is out of the normal voltage range set in the voltage monitoring circuit. In addition, when the rated voltage range that guarantees normal operation of the IC used on the board is set in the voltage monitoring circuit and a power supply abnormality is detected by the voltage monitoring circuit, it can be switched to a standby power supply, or The power supply is stopped.

この種の電源監視回路が用いられているボードは、たとえば図３に示すものがある。
このボード１０は、電源部１１と、電圧センサ１２と、電圧監視ＩＣ１３と、電圧監視コントローラ１４と、プロセッサ１５とを備えている。同電圧センサ１２、電圧監視ＩＣ１３及び電圧監視コントローラ１４で、電源監視回路が構成されている。
このボード１０では、電源部１１から供給されている電源電圧ｖｃが電圧センサ１２で検出される。電圧監視コントローラ１４には、電源電圧ｖｃの正常電圧範囲があらかじめ設定されている。この電圧監視コントローラ１４により、電圧センサ１２で検出される電源電圧ｖｃの電圧値ｖｅが正常電圧範囲と比較され、同電圧値ｖｅが正常電圧範囲外になるとき、電源異常報告信号ｐｂが出力され、プロセッサ１５に送出される。 An example of a board in which this type of power supply monitoring circuit is used is shown in FIG.
The board 10 includes a power supply unit 11, a voltage sensor 12, a voltage monitoring IC 13, a voltage monitoring controller 14, and a processor 15. The voltage sensor 12, voltage monitoring IC 13 and voltage monitoring controller 14 constitute a power supply monitoring circuit.
In this board 10, the power supply voltage vc supplied from the power supply unit 11 is detected by the voltage sensor 12. In the voltage monitoring controller 14, a normal voltage range of the power supply voltage vc is set in advance. The voltage monitoring controller 14 compares the voltage value ve of the power supply voltage vc detected by the voltage sensor 12 with the normal voltage range, and when the voltage value ve falls outside the normal voltage range, the power supply abnormality report signal pb is output. , Sent to the processor 15.

また、電圧監視ＩＣ１３には、電源部１１から電源電圧ｖｃが供給されて所定の動作を行う図示しないＩＣなどの電子回路の正常動作を保証する定格電圧範囲が設定されている。この電圧監視ＩＣ１３により、電源電圧ｖｃの電圧値が定格電圧範囲と比較され、同電圧値が定格電圧範囲外になるとき、電源アラームｐａが発生する。電圧監視ＩＣ１３から電源アラームｐａが発生したとき、予備電源に切り替えられるか、あるいは、電源の供給が停止され、また、電圧監視コントローラ１４から電源異常報告信号ｐｂが出力され、プロセッサ１５に送出される。   The voltage monitoring IC 13 is set with a rated voltage range that guarantees normal operation of an electronic circuit such as an IC (not shown) that is supplied with the power supply voltage vc from the power supply unit 11 and performs a predetermined operation. The voltage monitoring IC 13 compares the voltage value of the power supply voltage vc with the rated voltage range, and when the voltage value falls outside the rated voltage range, the power supply alarm pa is generated. When the power supply alarm pa is generated from the voltage monitoring IC 13, the power supply is switched to the standby power supply or the power supply is stopped, and the power supply abnormality report signal pb is output from the voltage monitoring controller 14 and sent to the processor 15. .

上記の電源監視回路の他、この種の関連技術としては、たとえば、特許文献１に記載された電源監視装置がある。
この電源監視装置では、電源電圧監視部は、被監視回路に供給される電源電圧を常に監視し、電源電圧があらかじめ定めた閾値（たとえば、被監視回路の正常動作を保証する電圧Ｖ１より高いが定格電圧よりは低い電圧Ｖ２）より低下したことを検出したとき、電圧低下信号を出力する。電圧低下信号を受けた監視制御部は、被監視回路に動作異常が発生しているか否かを、被監視回路の運用データを自己の基準データと比較することにより判定する。これにより、電源電圧の瞬断や急激な低下などにより被監視回路に発生する動作異常が迅速に検出される。 In addition to the power supply monitoring circuit described above, as this type of related technology, for example, there is a power supply monitoring device described in Patent Document 1.
In this power supply monitoring apparatus, the power supply voltage monitoring unit constantly monitors the power supply voltage supplied to the monitored circuit, and the power supply voltage is higher than a predetermined threshold (for example, a voltage V1 that guarantees normal operation of the monitored circuit). When it is detected that the voltage V2) is lower than the rated voltage, a voltage drop signal is output. Upon receiving the voltage drop signal, the monitoring control unit determines whether or not an operation abnormality has occurred in the monitored circuit by comparing the operation data of the monitored circuit with its own reference data. As a result, an abnormal operation that occurs in the monitored circuit due to a momentary power supply voltage interruption or a rapid decrease is quickly detected.

また、特許文献２に記載された電源制御装置では、マザーボード上のオンボード電源で生成された出力電圧を検知する電圧センサが設けられ、制御マイコンによりオンボード電源が監視され、異常が検出された場合、電源供給元が、異常が検出された該当オンボード電源から、マザーボード上に配置された予備電源に切り替えられる。これにより、マザーボード上の電源がダウンする前に予備電源に切り替えられ、システムダウンが回避される。   Moreover, in the power supply control device described in Patent Document 2, a voltage sensor that detects an output voltage generated by the onboard power supply on the motherboard is provided, the onboard power supply is monitored by the control microcomputer, and an abnormality is detected. In this case, the power supply source is switched from the corresponding on-board power source where the abnormality is detected to the standby power source arranged on the motherboard. As a result, the power supply on the motherboard is switched to the standby power supply before the power supply goes down, and the system down is avoided.

また、特許文献３に記載された電源電圧検出装置は、直流電源回路の出力端子間に接続された電圧検出回路と、同電圧検出回路に駆動され、電源アラーム信号を送出する信号送出回路とから構成されている。電圧検出回路では、検出範囲が、負荷が正常に動作する正常電圧範囲をカバーするように設定され、直流電源回路の出力電圧が同正常電圧範囲を超えた場合に電圧異常が検出可能である。   The power supply voltage detection device described in Patent Document 3 includes a voltage detection circuit connected between the output terminals of the DC power supply circuit, and a signal transmission circuit that is driven by the voltage detection circuit and transmits a power supply alarm signal. It is configured. In the voltage detection circuit, the detection range is set so as to cover a normal voltage range in which the load operates normally, and a voltage abnormality can be detected when the output voltage of the DC power supply circuit exceeds the normal voltage range.

特開２００７−２６４７６７号公報JP 2007-264767 A 特開２００８−２２６０６５号公報JP 2008-226065 A 特開平０２−０２６２１７号公報Japanese Patent Laid-Open No. 02-026217

しかしながら、上記関連技術では、次のような課題があった。
すなわち、図３の電源監視回路では、電圧センサ１２の検出精度に限界があることや、電圧センサ１２からの電圧値ｖｅに対する電圧監視コントローラ１４の読み出しタイミングの間隔が一定時間必要なことから、電源部１１の電源電圧ｖｃが、電圧監視コントローラ１４に設定されている正常電圧範囲の上限値又は下限値付近でふらつくような場合や、電源部１１の経年劣化などにより電源電圧ｖｃが緩やかに下降する場合には、電源の異常が検出されないことがあるという課題がある。 However, the related technology has the following problems.
That is, in the power supply monitoring circuit of FIG. 3, since the detection accuracy of the voltage sensor 12 is limited and the interval of the read timing of the voltage monitoring controller 14 with respect to the voltage value ve from the voltage sensor 12 is required for a certain time, When the power supply voltage vc of the unit 11 fluctuates near the upper limit value or the lower limit value of the normal voltage range set in the voltage monitoring controller 14, or the power supply unit vc gradually decreases due to aging deterioration of the power supply unit 11 or the like. In such a case, there is a problem that a power supply abnormality may not be detected.

また、特許文献１に記載された電源監視装置では、被監視回路に発生する動作異常が迅速に検出されるが、この発明とは構成が異なる。   Moreover, in the power supply monitoring apparatus described in Patent Document 1, an operation abnormality occurring in the monitored circuit is detected quickly, but the configuration is different from the present invention.

特許文献２に記載された電源制御装置では、システムダウンが回避されるが、上記の課題を解決するものではない。   In the power supply control device described in Patent Document 2, a system down is avoided, but the above problem is not solved.

特許文献３に記載された電源電圧検出装置では、負荷が正常に動作する正常電圧範囲の上限値又は下限値付近でふらつくような電圧異常は検出されないので、上記の課題は解決されない。   In the power supply voltage detection device described in Patent Literature 3, voltage abnormality that fluctuates in the vicinity of the upper limit value or lower limit value of the normal voltage range in which the load operates normally is not detected, and thus the above-described problem cannot be solved.

この発明は、上述の事情に鑑みてなされたもので、電源の異常検出機能を向上させた電源監視回路、該電源監視回路に用いられる電源監視方法及び電源監視制御プログラム、並びに電子機器を提供することを目的としている。   The present invention has been made in view of the above circumstances, and provides a power supply monitoring circuit with an improved power supply abnormality detection function, a power supply monitoring method and a power supply monitoring control program used in the power supply monitoring circuit, and an electronic device. The purpose is that.

上記課題を解決するために、この発明の第１の構成は、電源電圧を検出する電圧検出手段と、前記電源電圧の正常電圧範囲があらかじめ設定され、前記電圧検出手段で検出される前記電源電圧を前記正常電圧範囲と比較し、前記電源電圧が前記正常電圧範囲外になるとき、電源異常報告信号を出力する電圧監視制御手段と、所定の範囲の監視用電圧範囲が設定され、前記電源電圧を前記監視用電圧範囲と比較し、前記電源電圧が前記監視用電圧範囲外になるとき、システムダウン発生のおそれを知らせる警報用信号を発生する電圧監視回路とを有する電源監視回路に係り、前記監視用電圧範囲は、前記正常電圧範囲の上限値よりも所定値低く、かつ、下限値よりも所定値高い範囲として設定されていて、前記電圧監視制御手段は、前記電圧検出手段で検出される前記電源電圧を所定のタイミング間隔で読み取って前記正常電圧範囲と比較し、当該比較の結果、前記電源電圧が前記正常電圧範囲内にあるときは、前記電圧監視回路から前記警報用信号が発生しているか否かを確認し、前記警報用信号の発生が確認されたとき、電源異常報告信号を出力することを特徴としている。 In order to solve the above-described problem, a first configuration of the present invention includes a voltage detection unit that detects a power supply voltage, and a normal voltage range of the power supply voltage that is set in advance and is detected by the voltage detection unit. the comparison with the normal voltage range, when the power supply voltage is outside the normal voltage range, the voltage monitoring control means for outputting a power failure report signal, monitoring the voltage range of Jo Tokoro range is set, the power supply voltage compared to said monitoring voltage range, when the power supply voltage is outside the monitoring voltage range, relates to a power supply monitoring circuit and a voltage monitoring circuitry for generating a warning signal indicating the possibility of system failure occurs the monitoring voltage range, the predetermined value than the upper limit of the normal voltage range low and have been set as the predetermined value range higher than the lower limit value, the voltage monitoring control means, said voltage detection The power supply voltage detected by the means is read at a predetermined timing interval and compared with the normal voltage range. As a result of the comparison, when the power supply voltage is within the normal voltage range, the alarm is sent from the voltage monitoring circuit. Whether or not a warning signal is generated, and when generation of the warning signal is confirmed, a power supply abnormality report signal is output .

この発明の第２の構成は、電源電圧を検出する電圧検出手段と、前記電源電圧の正常電圧範囲があらかじめ設定され、前記電圧検出手段で検出される前記電源電圧を前記正常電圧範囲と比較し、前記電源電圧が前記正常電圧範囲外になるとき、電源異常報告信号を出力する電圧監視制御手段と、所定の範囲の監視用電圧範囲が設定され、前記電源電圧を前記監視用電圧範囲と比較し、前記電源電圧が前記監視用電圧範囲外になるとき、システムダウン発生のおそれを知らせる警報用信号を発生する電圧監視回路とを有する電源監視回路に用いられる電源監視方法に係り、前記監視用電圧範囲を、前記正常電圧範囲の上限値よりも所定値低く、かつ、下限値よりも所定値高い範囲として設定し、前記電圧監視制御手段に、前記電圧検出手段で検出される前記電源電圧を所定のタイミング間隔で読み取って前記正常電圧範囲と比較する処理と、当該比較の結果、前記電源電圧が前記正常電圧範囲内にあるときは、前記電圧監視回路から前記警報用信号が発生しているか否かを確認する処理と、前記警報用信号の発生が確認されたとき、電源異常報告信号を出力する処理とを行わせることを特徴としている。 According to a second configuration of the present invention, a voltage detection means for detecting a power supply voltage, a normal voltage range of the power supply voltage is preset, and the power supply voltage detected by the voltage detection means is compared with the normal voltage range. , when the power supply voltage is outside the normal voltage range, power failure and report signal voltage monitoring control means for outputting, is set monitoring voltage range Jo Tokoro range, the pre-Symbol supply voltage the monitoring voltage compared to a range, when the power supply voltage is outside the monitoring voltage range, it relates to a power monitoring method for use in a power supply monitoring circuit and a voltage monitoring circuitry for generating a warning signal indicating the possibility of system failure occurs , said monitoring voltage range, the predetermined value lower than the upper limit of the normal voltage range, and is set as the predetermined value range higher than the lower limit, the voltage monitoring control means, detection by said voltage detecting means The power supply voltage is read at a predetermined timing interval and compared with the normal voltage range, and if the result of the comparison is that the power supply voltage is within the normal voltage range, the voltage monitoring circuit a process for confirming whether or not the signal is generated, when said emission of an alarm signal is confirmed, is characterized in that to perform processing and you output power failure report signal.

この発明の構成によれば、電源部の異常を早期に検出でき、同電源部に対する故障検出率を向上させることができる。これにより、この電源監視回路が設けられているコンピュータ装置などのシステムダウンが発生する前に電源部の交換を行うことが可能になり、システムダウンを予防することができ、コンピュータ装置などの信頼性を向上させることができる。   According to the configuration of the present invention, the abnormality of the power supply unit can be detected at an early stage, and the failure detection rate for the power supply unit can be improved. As a result, the power supply unit can be replaced before the system down of the computer device or the like provided with the power supply monitoring circuit occurs, the system down can be prevented, and the reliability of the computer device or the like can be prevented. Can be improved.

この発明の一実施形態である電源監視回路が設けられている電子機器の要部の電気的構成を示すブロック図である。It is a block diagram which shows the electric constitution of the principal part of the electronic device provided with the power supply monitoring circuit which is one Embodiment of this invention. 図１中の電圧監視コントローラ２５の動作を説明する図である。It is a figure explaining operation | movement of the voltage monitoring controller 25 in FIG. 関連する電源監視回路が設けられている電子機器の要部の電気的構成を示すブロック図である。It is a block diagram which shows the electric constitution of the principal part of the electronic device provided with the related power supply monitoring circuit.

上記電圧監視回路に設定されている上記監視用電圧範囲が、上記電圧監視制御手段に設定されている上記正常電圧範囲以内に設定されている電源監視回路を提供する。   Provided is a power supply monitoring circuit in which the monitoring voltage range set in the voltage monitoring circuit is set within the normal voltage range set in the voltage monitoring control means.

また、上記電圧監視制御手段は、上記電圧検出手段で検出される上記電源電圧を所定のタイミング毎に読み取って上記正常電圧範囲と比較する構成とされ、上記電圧監視回路は、上記電源電圧を上記監視用電圧範囲と常時比較する構成とされている。   The voltage monitoring control means is configured to read the power supply voltage detected by the voltage detection means at every predetermined timing and compare it with the normal voltage range, and the voltage monitoring circuit converts the power supply voltage to the normal voltage range. It is configured to constantly compare with the monitoring voltage range.

また、上記電源異常監視手段は、上記電源電圧が上記正常電圧範囲外になるとき、あるいは、上記電源電圧が上記正常電圧範囲内にあるときでも、上記電圧監視回路から上記警報用信号が発生したときは、上記電源異常報告信号を出力する構成とされている。また、電源監視回路は、上記電源電圧が供給されて所定の動作を行う電子回路の正常動作を保証する定格電圧範囲が設定され、上記電源電圧を上記定格電圧範囲と比較し、上記電源電圧が上記定格電圧範囲外になるとき、故障検出信号を発生する故障検出手段を有し、上記電源異常監視手段は、上記故障検出手段から上記故障検出信号が発生したとき、上記電源異常報告信号を出力する構成とされている。 Further, the power source malfunction monitoring means, when the upper Symbol supply voltage is outside the normal voltage, or the when the power supply voltage is within the normal voltage range also, the alarm signal from the voltage monitoring circuit is generated In such a case, the power supply abnormality report signal is output. In addition, the power supply monitoring circuit is set with a rated voltage range that guarantees normal operation of an electronic circuit that is supplied with the power supply voltage and performs a predetermined operation, and compares the power supply voltage with the rated voltage range. A failure detection means for generating a failure detection signal when the rated voltage range is exceeded; and the power supply abnormality monitoring means outputs the power supply abnormality report signal when the failure detection signal is generated from the failure detection means. It is supposed to be configured.

実施形態Embodiment

図１は、この発明の一実施形態である電源監視回路が設けられている電子機器の要部の電気的構成を示すブロック図である。
この形態の電子機器は、同図に示すように、コンピュータ装置などに実装されているボード（回路基板）２０であり、電源部２１と、電圧センサ２２と、電圧監視ＩＣ２３と、電圧監視ＩＣ２４と、電圧監視コントローラ２５と、プロセッサ２６とを備えている。同電圧センサ２２、電圧監視ＩＣ２３、電圧監視ＩＣ２４及び電圧監視コントローラ２５で、電源監視回路が構成されている。電圧センサ２２は、電源部２１から供給されている電源電圧ｖｃを検出して電圧値ｖｅを出力する。電圧監視ＩＣ２３は、電源部２１から電源電圧ｖｃが供給されて所定の動作を行う図示しないＩＣなどの電子回路の正常動作を保証する定格電圧範囲が設定され、電源電圧ｖｃの電圧値を定格電圧範囲と比較し、電源電圧ｖｃの電圧値が定格電圧範囲外になるとき、電源アラームｐａ（故障検出信号）を発生する。 FIG. 1 is a block diagram showing an electrical configuration of a main part of an electronic apparatus provided with a power supply monitoring circuit according to an embodiment of the present invention.
As shown in the figure, the electronic apparatus of this form is a board (circuit board) 20 mounted on a computer device or the like, and includes a power supply unit 21, a voltage sensor 22, a voltage monitoring IC 23, a voltage monitoring IC 24, The voltage monitoring controller 25 and the processor 26 are provided. The voltage sensor 22, voltage monitoring IC 23, voltage monitoring IC 24, and voltage monitoring controller 25 constitute a power supply monitoring circuit. The voltage sensor 22 detects the power supply voltage vc supplied from the power supply unit 21 and outputs a voltage value ve. The voltage monitoring IC 23 is set with a rated voltage range that guarantees normal operation of an electronic circuit such as an IC (not shown) that is supplied with the power supply voltage vc from the power supply unit 21 and performs a predetermined operation, and the voltage value of the power supply voltage vc is set to the rated voltage. When the voltage value of the power supply voltage vc is out of the rated voltage range as compared with the range, the power supply alarm pa (failure detection signal) is generated.

電圧監視ＩＣ２４は、所定の範囲の監視用電圧範囲が設定され、電源部２１の電源電圧ｖｃを監視用電圧範囲と常時比較し、電源電圧ｖｃが監視用電圧範囲外になるとき、電源アラームｐｆ（警報用信号）を発生する。電圧監視コントローラ２５は、電源監視制御プログラムに基づいて動作するコンピュータで構成され、電源電圧ｖｃの正常電圧範囲があらかじめ設定され、電圧センサ２２で検出される電源電圧ｖｃの電圧値ｖｅを所定のタイミング毎に読み取って同正常電圧範囲と比較し、同電圧値ｖｅが同正常電圧範囲外になるとき、電源異常報告信号ｐｂを出力する。   The voltage monitoring IC 24 sets a monitoring voltage range within a predetermined range, constantly compares the power supply voltage vc of the power supply unit 21 with the monitoring voltage range, and when the power supply voltage vc falls outside the monitoring voltage range, the power supply alarm pf (Alarm signal) is generated. The voltage monitoring controller 25 is configured by a computer that operates based on a power supply monitoring control program. A normal voltage range of the power supply voltage vc is set in advance, and the voltage value ve of the power supply voltage vc detected by the voltage sensor 22 is set to a predetermined timing. Each time it is read and compared with the same normal voltage range, when the same voltage value ve falls outside the same normal voltage range, a power supply abnormality report signal pb is output.

特に、この実施形態では、電圧監視コントローラ２５には、電源異常監視手段２５ａが付加され、同電源異常監視手段２５ａは、電圧監視ＩＣ２４から電源アラームｐｆが発生したとき、電源異常報告信号ｐｂを出力する。また、電源異常監視手段２５ａは、電源電圧ｖｃの電圧値ｖｅが上記正常電圧範囲外になるとき、電源異常報告信号ｐｂを出力する。また、電源異常監視手段２５ａは、電圧監視ＩＣ２３から電源アラームｐａが発生したとき、電源異常報告信号ｐｂを出力する。また、電圧監視ＩＣ２４に設定されている上記監視用電圧範囲は、電圧監視コントローラ２５に設定されている上記正常電圧範囲以内（たとえば、正常電圧範囲の上限値よりも所定値低く、かつ下限値よりも所定値高い範囲）に設定されている。   In particular, in this embodiment, a power supply abnormality monitoring unit 25a is added to the voltage monitoring controller 25, and the power supply abnormality monitoring unit 25a outputs a power supply abnormality report signal pb when a power supply alarm pf is generated from the voltage monitoring IC 24. To do. The power supply abnormality monitoring unit 25a outputs a power supply abnormality report signal pb when the voltage value ve of the power supply voltage vc is outside the normal voltage range. The power supply abnormality monitoring means 25a outputs a power supply abnormality report signal pb when a power supply alarm pa is generated from the voltage monitoring IC 23. The voltage range for monitoring set in the voltage monitoring IC 24 is within the normal voltage range set in the voltage monitoring controller 25 (for example, lower than the upper limit value of the normal voltage range and lower than the lower limit value). Is also set to a range higher by a predetermined value.

図２は、図１中の電圧監視コントローラ２５の動作を説明する図であり、同図（ａ）は、フローチャート、及び同図（ｂ）が、各状態における動作の対応関係を示す図である。
これらの図を参照して、この形態の電源監視回路に用いられる電源監視方法の処理内容について説明する。
この電源監視回路では、電源部２１の電源電圧ｖｃが電圧センサ２２で検出され、電圧値ｖｅが出力される。電圧監視コントローラ２５では、電源電圧ｖｃの電圧値ｖｅの正常電圧範囲があらかじめ設定され、電圧センサ２２で検出される電源電圧ｖｃの電圧値ｖｅが同正常電圧範囲と比較され、同電圧値ｖｅが同正常電圧範囲外になるとき、電源異常報告信号ｐｂが出力される。 FIG. 2 is a diagram for explaining the operation of the voltage monitoring controller 25 in FIG. 1. FIG. 2A is a flowchart, and FIG. 2B is a diagram showing the correspondence of the operation in each state. .
With reference to these drawings, processing contents of the power supply monitoring method used in the power supply monitoring circuit of this embodiment will be described.
In this power supply monitoring circuit, the power supply voltage vc of the power supply unit 21 is detected by the voltage sensor 22 and the voltage value ve is output. In the voltage monitoring controller 25, the normal voltage range of the voltage value ve of the power supply voltage vc is set in advance, the voltage value ve of the power supply voltage vc detected by the voltage sensor 22 is compared with the normal voltage range, and the voltage value ve is obtained. When the voltage is outside the normal voltage range, the power supply abnormality report signal pb is output.

また、電圧監視ＩＣ２４により、電源電圧ｖｃは、電圧監視コントローラ２５に設定されている正常電圧範囲以内に設定されている監視用電圧範囲と比較され、同電源電圧ｖｃの電圧値が同監視用電圧範囲外になるとき電源アラームｐｆが発生する（電圧監視処理）。電圧監視ＩＣ２４から電源アラームｐｆが発生したとき、電圧監視コントローラ２５の電源異常監視手段２５ａにより、電源異常報告信号ｐｂが出力される（信号出力処理）。この信号出力処理では、電圧監視ＩＣ２４から電源アラームｐｆが発生したとき、電源異常監視手段２５ａにより、電源異常報告信号ｐｂが出力され、また、電源電圧ｖｃの電圧値ｖｅが正常電圧範囲外になるとき、電源異常報告信号ｐｂが出力される。また、電圧監視ＩＣ２３から電源アラームｐａが発生したとき、電源異常監視手段２５ａにより、電源異常報告信号ｐｂが出力される。   Further, the voltage monitoring IC 24 compares the power supply voltage vc with the monitoring voltage range set within the normal voltage range set in the voltage monitoring controller 25, and the voltage value of the power supply voltage vc is the same as the monitoring voltage. When it goes out of range, a power supply alarm pf occurs (voltage monitoring process). When a power supply alarm pf occurs from the voltage monitoring IC 24, a power supply abnormality report signal pb is output by the power supply abnormality monitoring means 25a of the voltage monitoring controller 25 (signal output processing). In this signal output process, when a power supply alarm pf occurs from the voltage monitoring IC 24, the power supply abnormality monitoring means 25a outputs a power supply abnormality report signal pb, and the voltage value ve of the power supply voltage vc falls outside the normal voltage range. Power supply abnormality report signal pb is output. Further, when a power supply alarm pa is generated from the voltage monitoring IC 23, the power supply abnormality monitoring means 25a outputs a power supply abnormality report signal pb.

すなわち、図２（ａ）に示すように、電圧監視コントローラ２５により、電圧監視ＩＣ２３からのアラームの確認が行われ（ステップＡ１）、同電圧監視ＩＣ２３が電源電圧ｖｃの異常を検出し、電源アラームｐａが検出されたとき、電源の故障が検出された旨がプロセッサ２６に報告される（ステップＡ２、図２（ｂ））。一方、電圧監視ＩＣ２３から電源アラームｐａが検出されないとき、電圧監視コントローラ２５により、電圧センサ２２から電圧値ｖｅが読み出され（ステップＡ３）、同電圧値ｖｅが確認される（ステップＡ４）。この場合、電圧値ｖｅは、電圧監視コントローラ２５に設定されている正常電圧範囲と比較されて正常／異常が判定され、異常時では、電源が異常である旨がプロセッサ２６に報告され（ステップＡ５、図２（ｂ））、また、正常時では、電圧監視ＩＣ２４からのアラームの確認が行われる（ステップＡ６）。電圧値ｖｅが正常範囲であっても、電圧監視コントローラ２５により、電圧監視ＩＣ２４から電源アラームｐｆが検出されたときには、電源が異常である旨がプロセッサ２６に報告され（ステップＡ７、図２（ｂ））、一方、電圧監視ＩＣ２４から電源アラームｐｆが検出されないときには、再びステップＡ１に戻り、電圧監視ＩＣ２３からのアラームの確認が繰り返し行われる。   That is, as shown in FIG. 2A, the voltage monitoring controller 25 confirms an alarm from the voltage monitoring IC 23 (step A1), the voltage monitoring IC 23 detects an abnormality in the power supply voltage vc, and a power supply alarm. When pa is detected, the processor 26 is notified that a power failure has been detected (step A2, FIG. 2B). On the other hand, when the power supply alarm pa is not detected from the voltage monitoring IC 23, the voltage monitoring controller 25 reads the voltage value ve from the voltage sensor 22 (step A3) and confirms the voltage value ve (step A4). In this case, the voltage value ve is compared with the normal voltage range set in the voltage monitoring controller 25 to determine normality / abnormality, and when abnormal, the fact that the power supply is abnormal is reported to the processor 26 (step A5). FIG. 2 (b)), and in the normal state, an alarm is confirmed from the voltage monitoring IC 24 (step A6). Even when the voltage value ve is in the normal range, when the power monitoring alarm pf is detected from the voltage monitoring IC 24 by the voltage monitoring controller 25, the processor 26 is notified that the power is abnormal (step A7, FIG. 2 (b)). On the other hand, when the power supply alarm pf is not detected from the voltage monitoring IC 24, the process returns to step A1 and the confirmation of the alarm from the voltage monitoring IC 23 is repeatedly performed.

以上のように、この実施形態では、電源部２１の電源電圧ｖｃは、電圧センサ２２による電圧値の確認に加え、電圧監視ＩＣ２４により、設定されている監視用電圧範囲と比較され、同電源電圧ｖｃが同監視用電圧範囲外になるとき、同電圧監視ＩＣ２４から電源アラームｐｆが発生するので、電源電圧ｖｃが、電圧監視コントローラ２５に設定されている正常電圧範囲の上限値又は下限値付近でふらつくような場合や、電源部２１の経年劣化などにより電源電圧ｖｃが緩やかに下降する場合に、電源部２１の異常が検出される。これにより、電源部２１の異常が早期に検出され、同電源部２１に対する故障検出率が向上する。また、この電源監視回路が設けられているコンピュータ装置などのシステムダウンが発生する前に電源部２１の交換を行うことが可能になり、システムダウンを予防することができ、コンピュータ装置などの信頼性が向上する。   As described above, in this embodiment, the power supply voltage vc of the power supply unit 21 is compared with the set monitoring voltage range by the voltage monitoring IC 24 in addition to the confirmation of the voltage value by the voltage sensor 22, and the power supply voltage vc When vc goes out of the monitoring voltage range, a power supply alarm pf is generated from the voltage monitoring IC 24, so that the power supply voltage vc is near the upper limit value or lower limit value of the normal voltage range set in the voltage monitoring controller 25. When the power supply voltage vc gradually decreases due to a fluctuation or due to aging deterioration of the power supply unit 21, an abnormality of the power supply unit 21 is detected. Thereby, the abnormality of the power supply unit 21 is detected at an early stage, and the failure detection rate for the power supply unit 21 is improved. In addition, it becomes possible to replace the power supply unit 21 before the system down of the computer device or the like provided with the power supply monitoring circuit occurs, and the system down can be prevented, and the reliability of the computer device or the like can be prevented. Will improve.

以上、この発明の実施形態を図面により詳述してきたが、具体的な構成は同実施形態に限られるものではなく、この発明の要旨を逸脱しない範囲の設計の変更などがあっても、この発明に含まれる。
たとえば、上記実施形態では、電圧監視ＩＣ２４は、電圧監視コントローラ２５に設定されている正常電圧範囲以内の監視用電圧範囲が設定されているが、同監視用電圧範囲は、任意の範囲に変更調整が可能な構成とされていても良い。 The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiment, and even if there is a design change without departing from the gist of the present invention, Included in the invention.
For example, in the above embodiment, the voltage monitoring IC 24 has a monitoring voltage range within the normal voltage range set in the voltage monitoring controller 25, but the monitoring voltage range is changed and adjusted to an arbitrary range. May be configured.

この発明は、コンピュータ装置などの電子機器に供給される電源電圧を監視する電源監視回路全般に適用でき、特に、経年劣化などにより電源電圧が低下するような機器に適用して有効である。   The present invention can be applied to all power supply monitoring circuits for monitoring a power supply voltage supplied to an electronic device such as a computer apparatus, and is particularly effective when applied to a device in which the power supply voltage is lowered due to deterioration over time.

２０ ボード（電子機器）
２１ 電源部（電子機器の一部）
２２ 電圧センサ（電圧検出手段、電源監視回路の一部）
２３ 電圧監視ＩＣ（故障検出手段、電源監視回路の一部）
２４ 電圧監視ＩＣ（電圧監視回路、電源監視回路の一部）
２４ａ 電源異常監視手段
２５ 電圧監視コントローラ（電圧監視制御手段、電源監視回路の一部）
２６ プロセッサ（電子機器の一部） 20 boards (electronic equipment)
21 Power supply (part of electronic equipment)
22 Voltage sensor (voltage detection means, part of power supply monitoring circuit)
23 Voltage monitoring IC (Fault detection means, part of power monitoring circuit)
24 Voltage monitoring IC (Voltage monitoring circuit, part of power monitoring circuit)
24a Power supply abnormality monitoring means 25 Voltage monitoring controller (voltage monitoring control means, part of power supply monitoring circuit)
26 Processor (part of electronic equipment)

Claims (6)

電源電圧を検出する電圧検出手段と、
前記電源電圧の正常電圧範囲があらかじめ設定され、前記電圧検出手段で検出される前記電源電圧を前記正常電圧範囲と比較し、前記電源電圧が前記正常電圧範囲外になるとき、電源異常報告信号を出力する電圧監視制御手段と、
所定の範囲の監視用電圧範囲が設定され、前記電源電圧を前記監視用電圧範囲と比較し、前記電源電圧が前記監視用電圧範囲外になるとき、システムダウン発生のおそれを知らせる警報用信号を発生する電圧監視回路とを有する電源監視回路であって、
前記監視用電圧範囲は、前記正常電圧範囲の上限値よりも所定値低く、かつ、下限値よりも所定値高い範囲として設定されていて、
前記電圧監視制御手段は、
前記電圧検出手段で検出される前記電源電圧を所定のタイミング間隔で読み取って前記正常電圧範囲と比較し、当該比較の結果、前記電源電圧が前記正常電圧範囲内にあるときは、前記電圧監視回路から前記警報用信号が発生しているか否かを確認し、前記警報用信号の発生が確認されたとき、電源異常報告信号を出力することを特徴とする電源監視回路。 Voltage detection means for detecting a power supply voltage;
A normal voltage range of the power supply voltage is preset, the power supply voltage detected by the voltage detection means is compared with the normal voltage range, and when the power supply voltage is out of the normal voltage range, a power supply abnormality report signal is Voltage monitoring control means for outputting ;
Is set monitoring voltage range Jo Tokoro range, the power supply voltage as compared with the monitoring voltage range, when the power supply voltage is outside the monitoring voltage range, an alarm signal indicating the possibility of system failure occurs the power supply monitoring circuit and a voltage monitoring circuitry for generating,
The monitoring voltage range is set as a range lower than the upper limit value of the normal voltage range and higher than the lower limit value by a predetermined value,
The voltage monitoring control means includes
The power supply voltage detected by the voltage detection means is read at a predetermined timing interval and compared with the normal voltage range. As a result of the comparison, when the power supply voltage is within the normal voltage range, the voltage monitoring circuit A power supply monitoring circuit which checks whether or not the alarm signal is generated from the power supply and outputs a power supply abnormality report signal when the generation of the alarm signal is confirmed . 前記電源電圧が供給されて所定の動作を行う電子回路の正常動作を保証する定格電圧範囲が設定され、前記電源電圧を前記定格電圧範囲と比較し、前記電源電圧が前記定格電圧範囲外になるとき、故障検出信号を発生する故障検出手段を有し、
前記電源異常監視手段は、
前記故障検出手段から前記故障検出信号が発生したとき、前記電源異常報告信号を出力する構成とされていることを特徴とする請求項１記載の電源監視回路。 A rated voltage range that ensures normal operation of an electronic circuit that is supplied with the power supply voltage and performs a predetermined operation is set, the power supply voltage is compared with the rated voltage range, and the power supply voltage is out of the rated voltage range When having a failure detection means for generating a failure detection signal,
The power supply abnormality monitoring means is
When said failure detection signal from said failure detecting means has occurred, the power supply monitoring circuit according to claim 1, characterized by being configured to output the power failure report signal. 電源電圧を検出する電圧検出手段と、
前記電源電圧の正常電圧範囲があらかじめ設定され、前記電圧検出手段で検出される前記電源電圧を前記正常電圧範囲と比較し、前記電源電圧が前記正常電圧範囲外になるとき、電源異常報告信号を出力する電圧監視制御手段と、
所定の範囲の監視用電圧範囲が設定され、前記電源電圧を前記監視用電圧範囲と比較し、前記電源電圧が前記監視用電圧範囲外になるとき、システムダウン発生のおそれを知らせる警報用信号を発生する電圧監視回路とを有する電源監視回路に用いられる電源監視方法であって、
前記監視用電圧範囲を、前記正常電圧範囲の上限値よりも所定値低く、かつ、下限値よりも所定値高い範囲として設定し、
前記電圧監視制御手段に、
前記電圧検出手段で検出される前記電源電圧を所定のタイミング間隔で読み取って前記正常電圧範囲と比較する処理と、当該比較の結果、前記電源電圧が前記正常電圧範囲内にあるときは、前記電圧監視回路から前記警報用信号が発生しているか否かを確認する処理と、前記警報用信号の発生が確認されたとき、電源異常報告信号を出力する処理とを行わせることを特徴とする電源監視方法。 Voltage detection means for detecting a power supply voltage;
A normal voltage range of the power supply voltage is preset, the power supply voltage detected by the voltage detection means is compared with the normal voltage range, and when the power supply voltage is out of the normal voltage range, a power supply abnormality report signal is Voltage monitoring control means for outputting ;
Monitoring the voltage range of Jo Tokoro range is set, by comparing the pre-Symbol supply voltage and the monitoring voltage range, when the power supply voltage is outside the monitoring voltage range, notifies the risk of system failure occurred alarm a power monitoring method for use in a power supply monitoring circuit and a voltage monitoring circuitry for generating a use signal,
The monitoring voltage range is set as a range lower by a predetermined value than the upper limit value of the normal voltage range and higher by a predetermined value than the lower limit value,
In the voltage monitoring control means,
A process of reading the power supply voltage detected by the voltage detection means at a predetermined timing interval and comparing it with the normal voltage range, and as a result of the comparison, when the power supply voltage is within the normal voltage range, the voltage a process for confirming whether the alarm signal is generated from the monitoring circuit, wherein when the occurrence of the alarm signal is confirmed, characterized in that to perform processing and you output power failure report signal Power supply monitoring method. 当該電源監視回路は、前記電源電圧が供給されて所定の動作を行う電子回路の正常動作を保証する定格電圧範囲が設定され、前記電源電圧を前記定格電圧範囲と比較し、前記電源電圧が前記定格電圧範囲外になるとき、故障検出信号を発生する故障検出手段を有し、
該故障検出手段から前記故障検出信号が発生したとき、前記電源異常監視手段に、前記電源異常報告信号を出力する処理を行わせることを特徴とする請求項３記載の電源監視方法。 The power supply monitoring circuit is set with a rated voltage range that guarantees normal operation of an electronic circuit that is supplied with the power supply voltage and performs a predetermined operation, and compares the power supply voltage with the rated voltage range. It has a failure detection means that generates a failure detection signal when it falls outside the rated voltage range,
When said failure detection signal from said failure detecting means has occurred, the power source malfunction monitoring unit, the power monitoring method according to claim 3, characterized in that to perform processing you output the power failure report signal. コンピュータを請求項１又は２記載の電圧監視制御手段として機能させるためのコンピュータ読み取り可能な電源監視制御プログラム。 Computer readable power monitoring control program for causing a computer to function as a voltage monitoring control unit according to claim 1 or 2, wherein. 請求項１又は２記載の電源監視回路が設けられていることを特徴とする電子機器。 Electronic apparatus, characterized in that the power supply monitoring circuit according to claim 1 or 2 is provided.
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