WO2017110312A1 - 電子機器 - Google Patents
電子機器 Download PDFInfo
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- WO2017110312A1 WO2017110312A1 PCT/JP2016/083878 JP2016083878W WO2017110312A1 WO 2017110312 A1 WO2017110312 A1 WO 2017110312A1 JP 2016083878 W JP2016083878 W JP 2016083878W WO 2017110312 A1 WO2017110312 A1 WO 2017110312A1
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- resistor
- power supply
- supply line
- circuit
- voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
Definitions
- the present invention relates to an electronic device.
- the load circuit is, for example, a sensor.
- an abnormality such as a short circuit of a power supply line connecting a power supply circuit and a load circuit is detected.
- the voltage of the power supply line is divided, the voltage is input as a monitoring voltage to a port of the microcomputer, and the monitoring voltage is monitored by the microcomputer, thereby determining a short circuit of the power supply line.
- the electronic apparatus includes a first power supply circuit that supplies power to the first load circuit via the first power supply line, and a second power source that supplies power to the second load circuit via the second power supply line.
- a power supply circuit; a first resistor having one end connected to the first power supply line; a second resistor having one end connected to the second power supply line; and other than the first resistor and the second resistor A third resistor connected to the end, and a monitoring circuit to which a monitoring voltage is input via the third resistor, the monitoring circuit based on the voltage, the first power supply line and the monitoring circuit The abnormality of the second power supply line is determined.
- FIG. 1 is a circuit configuration diagram of an electronic apparatus according to the first embodiment.
- the first power supply circuit 11 is supplied with a voltage V as a power supply, and outputs a voltage V1 based on the voltage V.
- the voltage V1 is supplied to the first load circuit 12 via the first power supply line L1 as the power supply for the first load circuit 12.
- the first load circuit 12 is, for example, a sensor or a DC fan.
- the second power supply circuit 13 is supplied with a voltage V as a power supply, and outputs a voltage V2 based on the voltage V.
- the voltage V2 is supplied to the second load circuit 14 through the second power supply line L2 as the power supply for the second load circuit 14.
- the second load circuit 14 is, for example, a sensor or a DC fan.
- One end of the first resistor R1 is connected to the first power supply line L1, and one end of the second resistor R2 is connected to the second power supply line L2.
- the other end of the first resistor R1 and the other end of the second resistor R2 are commonly connected to one end of the third resistor R3.
- the other end of the third resistor R3 is input to the monitoring port of the microcomputer 15 and is grounded via the fourth resistor R4.
- the microcomputer 15 determines the voltage value of the monitoring voltage input to the monitoring port, and determines the abnormality of the first power supply line L1 and the second power supply line L2.
- the first power supply line L1 or the second power supply line L1 or the second power supply line L2 is short-circuited to the ground side (hereinafter referred to as a short circuit), or is disconnected or the like. It is determined whether or not a voltage is output to the line L2 (hereinafter referred to as open).
- the resistance values of the first resistor R1 to the fourth resistor R4 are R1 to R4.
- the ratio between the resistance value of the first resistor R1 and the resistance value of the second resistor R2 is about twice.
- the resistance value of the fourth resistor R4 is about four times the combined resistance value of the first resistor R1, the second resistor R2, and the third resistor R3. What is about 2 times or about 4 times may be a resistance value at which voltages 41 to 45 in FIG.
- FIG. 2 shows an equivalent circuit of the circuit configuration shown in FIG. 2A shows a normal case where the first power supply line L1 and the second power supply line L2 are not short-circuited or opened, and FIG. 2B shows a case where the first power supply line L1 is open.
- 2C shows the case where the second power supply line L2 is open,
- FIG. 2D shows the case where the first power supply line L1 is short, and
- FIG. 2E shows the case where the second power supply line L2 is short. Is an equivalent circuit.
- the voltage values of the voltages V1 to V2 are V1 to V2
- the resistance values of the first resistor R1 to the fourth resistor R4 are R1 to R4
- the currents flowing through the first resistor R1 to the third resistor R3 are Ia and Ib, respectively.
- Ic Ic
- x shown in FIG. 2 (B) and FIG. 2 (C) indicates a disconnection.
- FIG. 3 is a diagram illustrating an example of equivalent circuit constants.
- a representative value (typ), a minimum value (min), and a maximum value (max) are shown for the voltage values of the voltages V1 to V2 and the resistance values of the first resistor R1 to the fourth resistor R4, respectively.
- the first resistor R 1 has a sufficiently large resistance value with respect to the internal resistance of the first load circuit 12, and the second resistor R 2 is sufficient with respect to the internal resistance of the second load circuit 14. It shall have a large resistance value.
- the current flowing through the first power supply line L1 and the second power supply line L2 is about 20 mA.
- FIG. 4 is a graph showing the monitoring voltage input to the monitoring port of the microcomputer 15.
- the vertical axis in FIG. 4 is the monitoring voltage, and the horizontal axis is time.
- the monitoring voltage characteristic 41 is about 3.9 to 4.1V.
- the monitoring voltage characteristic 42 is about 3.6 to 3.8V.
- the monitoring voltage characteristic 43 is about 3.1 to 3.2V.
- the monitoring voltage characteristic 44 is about 2.5 to 2.7V.
- the monitoring voltage characteristic 45 is about 1.3 to 1.4V.
- the microcomputer 15 determines an abnormality in the first power supply line L1 and the second power supply line L2 based on the monitoring voltage input to the monitoring port. Specifically, the abnormality is determined depending on which of the above characteristics 41 to 45 is the monitoring voltage.
- the monitoring voltage has the characteristics shown in FIG. 4 according to the abnormality.
- the monitoring voltage is expressed by the following equation (9).
- Monitoring voltage R4 ⁇ Ic (9)
- the representative value (typ) is 4.02 V
- the minimum value (min) is 3.94 V
- the maximum value (max ) 4.10V is a voltage indicated by the characteristic 41 in FIG.
- FIG. 5 is a circuit configuration diagram of an electronic apparatus according to the second embodiment.
- the circuit configuration diagram is obtained by removing the fourth resistor R4 from the circuit configuration diagram shown in FIG. The same parts as those in the circuit configuration diagram of FIG.
- one end of the first resistor R1 is connected to the first power supply line L1, and one end of the second resistor R2 is connected to the second power supply line L2.
- the other end of the first resistor R1 and the other end of the second resistor R2 are commonly connected to one end of the third resistor R3.
- the other end of the third resistor R3 is input to the monitoring port of the microcomputer (microcomputer) 15.
- the microcomputer 15 determines the voltage value of the monitoring voltage input to the monitoring port, and determines the abnormality of the first power supply line L1 and the second power supply line L2. Specifically, it is detected whether the first power supply line L1 and the second power supply line L2 are short-circuited to the ground side (hereinafter referred to as short-circuit).
- the relationship of the resistance values of the first resistor R1 to the fourth resistor R4 is shown.
- the ratio between the resistance value of the first resistor R1 and the resistance value of the second resistor R2 is about twice.
- FIG. 6 shows an equivalent circuit of the circuit configuration shown in FIG. 6A shows a normal case without a short
- FIG. 6B shows a case where the first power supply line L1 is short
- FIG. 6C shows a case where the second power supply line L2 is short.
- the voltage values of the voltages V1 to V2 are V1 to V2
- the resistance values of the first resistor R1 to the third resistor R3 are R1 to R3
- the currents flowing through the first resistor R1 to the third resistor R3 are respectively Ia. , Ib, Ic.
- the constants of the equivalent circuit shown in FIGS. 6A to 6C are as shown in FIG. In addition, this constant shows an example.
- the first resistor R 1 has a sufficiently large resistance value with respect to the internal resistance of the first load circuit 12, and the second resistor R 2 is sufficient with respect to the internal resistance of the second load circuit 14. It shall have a large resistance value.
- the current flowing through the first power supply line L1 and the second power supply line L2 is about 20 mA.
- FIG. 7 is a graph showing the monitoring voltage input to the monitoring port of the microcomputer 15.
- the vertical axis in FIG. 7 is the monitoring voltage, and the horizontal axis is time.
- the monitoring voltage characteristic 71 is about 4.9 to 5.1V.
- the monitoring voltage characteristic 72 is about 3.2 to 3.4V.
- the monitoring voltage characteristic 73 is about 1.66 to 1.72V.
- the microcomputer 15 determines an abnormality in the first power supply line L1 and the second power supply line L2 based on the monitoring voltage input to the monitoring port. Specifically, the abnormality is determined depending on which of the above characteristics 71 to 73 is the monitoring voltage.
- the monitoring voltage has the characteristics shown in FIG. 7 according to the abnormality.
- the monitoring voltage when the first power supply line L1 is short-circuited is expressed by the following equation (14).
- the characteristic 71 in FIG. 7 is a voltage that is substantially equal to the voltage V1 or V2 because Ia to Ic are very small.
- the second embodiment of the present invention even when the power supply line connecting the power supply circuit and the load circuit is increased to a plurality of systems, it is not necessary to increase the number of ports of the microcomputer, and the first power supply line L1. It can be determined that the abnormality of the second power supply line L2 is a short circuit.
- the electronic device includes a first power supply circuit 11 that supplies power to the first load circuit 12 via the first power supply line L1, and a second power supply line L2 that supplies the second load circuit 14 with the second power supply line L2.
- the monitoring circuit 15 includes a third resistor R3 connected to the other ends of the first resistor R1 and the second resistor R2, and a monitoring circuit (microcomputer) 15 to which a monitoring voltage is input via the third resistor R3.
- the abnormality of the first power supply line L1 and the second power supply line L2 is determined based on the voltage. This eliminates the need to increase the number of ports of the microcomputer even when the power supply lines connecting the power supply circuit and the load circuit are increased to a plurality of systems.
- the present invention is not limited to the above-described embodiment, and other forms conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention as long as the characteristics of the present invention are not impaired. .
- First power supply circuit 12 First load circuit 13 Second power supply circuit 14 Second load circuit L1 First power supply line L2 Second power supply lines R1 to R4 First resistance to fourth resistance
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Protection Circuit Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
図1は、第1の実施形態に係わる電子機器の回路構成図である。
V1=(R3+R4)×Ic+R1×Ia ・・・ (5)
V2=(R3+R4)×Ic+R2×Ib ・・・ (6)
式(5)に式(4)を代入して、
V1=(R3+R4+R1)×Ic-R1×Ib ・・・ (7)
式(6)の両辺にR1を掛け、且つ、式(7)の両辺にR2を掛けて両式の左辺及び右辺をそれぞれ加算して、次式(8)が求まる。
式(8)、式(9)に、図3で示す定数を入力して監視電圧を求めると、代表値(typ)では4.02V、最小値(min)では3.94V、最大値(max)では4.10Vとなる。この監視電圧は、図4の特性41で示す電圧である。
(第2の実施形態)
次に、本発明の電子機器の第2の実施形態について説明する。図5は、第2の実施形態に係わる電子機器の回路構成図である。第2の実施形態では、図1に示した回路構成図の第4抵抗R4を取り除いた回路構成図になっている。図1の回路構成図と同一箇所には同一の符号を付してその説明を省略する。
(1)電子機器は、第1負荷回路12に第1電源供給ラインL1を介して電源V1を供給する第1電源供給回路11と、第2負荷回路14に第2電源供給ラインL2を介して電源V2を供給する第2電源供給回路13と、第1電源供給ラインL1に一端が接続された第1抵抗R1と、第2電源供給ラインL2に一端が接続された第2抵抗R2と、第1抵抗R1及び第2抵抗R2の他端に接続された第3抵抗R3と、第3抵抗R3を介して監視用の電圧が入力される監視回路(マイコン)15とを備え、監視回路15は、電圧に基づいて、第1電源供給ラインL1及び第2電源供給ラインL2の異常を判定する。これにより、電源供給回路と負荷回路とを結ぶ電源供給ラインが複数系統に増加した場合にも、マイコンのポート数を増やす必要がなくなる。
12 第1負荷回路
13 第2電源供給回路
14 第2負荷回路
L1 第1電源供給ライン
L2 第2電源供給ライン
R1~R4 第1抵抗~第4抵抗
Claims (4)
- 第1負荷回路に第1電源供給ラインを介して電源を供給する第1電源供給回路と、
第2負荷回路に第2電源供給ラインを介して電源を供給する第2電源供給回路と、
前記第1電源供給ラインに一端が接続された第1抵抗と、
前記第2電源供給ラインに一端が接続された第2抵抗と、
前記第1抵抗及び前記第2抵抗の他端に接続された第3抵抗と、
前記第3抵抗を介して監視用の電圧が入力される監視回路とを備え、
前記監視回路は、前記電圧に基づいて、前記第1電源供給ライン及び前記第2電源供給ラインの異常を判定する電子機器。 - 請求項1に記載の電子機器において、
前記第1抵抗は、第1負荷回路の内部抵抗に対して十分大きな値の抵抗値を有し、前記第2抵抗は、第2負荷回路の内部抵抗に対して十分大きな値の抵抗値を有する電子機器。 - 請求項1または2に記載の電子機器において、
前記第3抵抗と前記監視回路との接続ラインに一端が接続され、他端が接地された第4抵抗を備え、
前記第1抵抗の抵抗値と前記第2抵抗の抵抗値の比は、2倍程度であり、前記第4抵抗の抵抗値は、前記第1抵抗と前記第2抵抗と前記第3抵抗の合成抵抗値の4倍程度である電子機器。 - 請求項1または2に記載の電子機器において、
前記監視回路は、前記電圧に基づいて、前記第1電源供給ライン及び前記第2電源供給ラインの異常が短絡であることを判定する電子機器。
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DE112016005441.6T DE112016005441T5 (de) | 2015-12-25 | 2016-11-16 | Elektronische Vorrichtung |
JP2017557796A JP6605622B2 (ja) | 2015-12-25 | 2016-11-16 | 電子機器 |
US16/063,809 US10761144B2 (en) | 2015-12-25 | 2016-11-16 | Electronic device |
CN201680066046.0A CN108369252B (zh) | 2015-12-25 | 2016-11-16 | 电子设备 |
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JP (1) | JP6605622B2 (ja) |
CN (1) | CN108369252B (ja) |
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CN110488205B (zh) * | 2018-10-24 | 2021-02-26 | 新华三技术有限公司 | 一种故障识别装置 |
CN111257792B (zh) * | 2018-11-30 | 2022-06-07 | 中兴通讯股份有限公司 | 有源器件的检测和保护电路、供电电路及供电方法 |
Citations (4)
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JPH01223360A (ja) * | 1988-03-03 | 1989-09-06 | Fujitsu Ltd | 電圧監視回路 |
JP2002267696A (ja) * | 2001-03-13 | 2002-09-18 | Unisia Jecs Corp | 電源異常検出装置 |
JP2012169715A (ja) * | 2011-02-10 | 2012-09-06 | Denso Corp | センサ故障検出装置 |
JP2015222228A (ja) * | 2014-05-23 | 2015-12-10 | 株式会社ノーリツ | 制御装置 |
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JP4843316B2 (ja) * | 2006-01-25 | 2011-12-21 | ローム株式会社 | 電力供給装置ならびにそれを用いた発光装置および電子機器 |
WO2014086381A1 (en) * | 2012-12-04 | 2014-06-12 | Volvo Truck Corporation | Method for isolation monitoring |
JP2014117084A (ja) | 2012-12-10 | 2014-06-26 | Funai Electric Co Ltd | 電子機器 |
CN104849562B (zh) * | 2015-05-04 | 2017-11-17 | 华为技术有限公司 | 检测供电系统阻抗异常的装置和方法 |
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- 2016-11-16 CN CN201680066046.0A patent/CN108369252B/zh active Active
- 2016-11-16 US US16/063,809 patent/US10761144B2/en active Active
- 2016-11-16 DE DE112016005441.6T patent/DE112016005441T5/de active Pending
- 2016-11-16 JP JP2017557796A patent/JP6605622B2/ja active Active
- 2016-11-16 WO PCT/JP2016/083878 patent/WO2017110312A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01223360A (ja) * | 1988-03-03 | 1989-09-06 | Fujitsu Ltd | 電圧監視回路 |
JP2002267696A (ja) * | 2001-03-13 | 2002-09-18 | Unisia Jecs Corp | 電源異常検出装置 |
JP2012169715A (ja) * | 2011-02-10 | 2012-09-06 | Denso Corp | センサ故障検出装置 |
JP2015222228A (ja) * | 2014-05-23 | 2015-12-10 | 株式会社ノーリツ | 制御装置 |
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JPWO2017110312A1 (ja) | 2018-06-21 |
US10761144B2 (en) | 2020-09-01 |
DE112016005441T5 (de) | 2018-08-09 |
CN108369252B (zh) | 2021-02-05 |
US20200088808A1 (en) | 2020-03-19 |
JP6605622B2 (ja) | 2019-11-13 |
CN108369252A (zh) | 2018-08-03 |
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