JPH04251523A - Detecting device for failure in power system - Google Patents
Detecting device for failure in power systemInfo
- Publication number
- JPH04251523A JPH04251523A JP2414926A JP41492690A JPH04251523A JP H04251523 A JPH04251523 A JP H04251523A JP 2414926 A JP2414926 A JP 2414926A JP 41492690 A JP41492690 A JP 41492690A JP H04251523 A JPH04251523 A JP H04251523A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- magnetic sensor
- detection device
- supply lines
- failure detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 239000002131 composite material Substances 0.000 claims abstract description 6
- 230000003321 amplification Effects 0.000 description 8
- 238000003199 nucleic acid amplification method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000005856 abnormality Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、制御装置の電子制御ユ
ニット等に使用される電源系統の故障検知装置に関する
。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure detection device for a power supply system used in an electronic control unit of a control device.
【０００２】0002
【従来の技術】従来、車両搭載の内燃エンジンの各種の
制御（例えば燃料供給制御、自動変速制御）を行う制御
装置の電子制御ユニットにおいては、電源線が断線する
と、制御装置全体の機能が全く停止してしまうため、プ
ラス側電源線及びマイナス側電源線を夫々２本以上の複
数本使用した構成を採用している。これら電源線のうち
１本が断線しても電力は供給され制御可能であるが、更
に時間が前後して複数本が断線すると制御装置全体の機
能が全く停止してしまう。[Prior Art] Conventionally, in the electronic control unit of a control device that performs various types of control (for example, fuel supply control, automatic transmission control) of an internal combustion engine installed in a vehicle, if a power line is disconnected, the entire function of the control device is lost. Therefore, a configuration is adopted in which two or more positive power supply wires and two or more negative power supply wires are used. Even if one of these power supply lines is disconnected, power is supplied and control is possible, but if a plurality of power supply lines are disconnected over time, the entire control device will stop functioning.
【０００３】そこで、従来は、各電源線にシャント抵抗
を設けて、該電源線に流れる電流を検出することが行わ
れている。[0003] Conventionally, therefore, a shunt resistor is provided in each power supply line to detect the current flowing through the power supply line.
【０００４】図４は、かかる従来のシャント抵抗を用い
た電源系統の故障検知装置を示す回路図である。同図に
おいて、１は直流電圧を供給するバッテリ、２は過電流
防止のためのヒューズ、３は車両全体の制御を行う電子
制御ユニット（以下、ＥＣＵという）、４ａ〜４ｄは４
本の電源線に設けられた電流検知抵抗（シャント抵抗）
Ｒ１〜Ｒ４で検知された電流に応じた電圧を増幅する増
幅部、５は出力電圧を安定化させる電源回路（電圧レギ
ュレータ）、６は車両制御のための演算を行う演算部、
７は演算部６に含まれ、アナログ信号をデジタル信号に
変換するＡ／Ｄ変換器、８はＬＥＤ等から成る故障表示
器、９はエンジン回転数信号等のエンジン運転パラメー
タが入力される入力線、１０は燃料噴射弁等に制御信号
を出力する出力線である。上記増幅部４ａ〜４ｄは、抵
抗Ｒ５〜Ｒ８および演算増幅器４１から成る。図４の回
路において、抵抗Ｒ１〜Ｒ４、増幅部４ａ〜４ｄ、演算
部６および故障表示器８は電源系統の故障検知装置を構
成する。FIG. 4 is a circuit diagram showing a failure detection device for a power supply system using such a conventional shunt resistor. In the figure, 1 is a battery that supplies DC voltage, 2 is a fuse for overcurrent prevention, 3 is an electronic control unit (hereinafter referred to as ECU) that controls the entire vehicle, and 4a to 4d are 4
Current detection resistor (shunt resistor) installed in the main power line
an amplification unit that amplifies the voltage according to the current detected by R1 to R4; 5 is a power supply circuit (voltage regulator) that stabilizes the output voltage; 6 is a calculation unit that performs calculations for vehicle control;
7 is an A/D converter included in the calculation unit 6 and converts an analog signal into a digital signal, 8 is a fault indicator consisting of an LED, etc., and 9 is an input line into which engine operating parameters such as an engine rotation speed signal are input. , 10 are output lines for outputting control signals to fuel injection valves and the like. The amplification sections 4a to 4d are composed of resistors R5 to R8 and an operational amplifier 41. In the circuit of FIG. 4, the resistors R1 to R4, the amplification sections 4a to 4d, the calculation section 6, and the failure indicator 8 constitute a failure detection device for the power supply system.
【０００５】上記電源系統の故障検知装置の正常動作時
には、図４に示すように、電流検出抵抗Ｒ１，Ｒ２をそ
れぞれ約＋ｉ／２の電流が流れ、電流検出抵抗Ｒ３，Ｒ
４をそれぞれ約−ｉ／２の電流が流れ、各増幅部４ａ〜
４ｄは上記各抵抗Ｒ１〜Ｒ４の両端間に発生した電源に
対応した電圧を増幅した電圧、例えば＋２．５Ｖを出力
する。これらの出力電圧はＡ／Ｄ変換器でデジタル変換
され、演算部内部の比較手段で電源線が正常のときの電
圧であると判断される。これに対して、４本の電源線の
うちの１本、例えば２本のプラス側電源線の一方が「断
」となると、「断」の電源線に接続されている電流検出
抵抗を流れる電流値は零となり、今まで同一電流が流れ
ていたもう一つの抵抗を流れる電流値は＋ｉ（全電流）
となる。例えば、抵抗Ｒ１が接続されている電源線が「
断」となると、抵抗Ｒ１を流れる電流は零、抵抗Ｒ２を
流れる電流は＋ｉとなり、増幅部４ａの出力電圧は０Ｖ
、増幅部４ｂの出力電圧は５Ｖとなる。これらの出力電
圧をＡ／Ｄ変換器７でＡ／Ｄ変換した値を演算部６の比
較手段で比較して、プラス側電源線異常の電圧であると
判断する。During normal operation of the power supply system failure detection device, as shown in FIG.
A current of about -i/2 flows through each of the amplifier sections 4a to 4.
4d outputs a voltage, for example, +2.5V, which is an amplified voltage corresponding to the power supply generated across each of the resistors R1 to R4. These output voltages are digitally converted by an A/D converter, and are determined by comparison means inside the calculation section to be the voltages when the power supply line is normal. On the other hand, if one of the four power supply lines, for example one of the two positive power supply lines, becomes disconnected, the current flows through the current detection resistor connected to the disconnected power supply line. The value becomes zero, and the current value flowing through the other resistance where the same current was flowing until now is +i (total current)
becomes. For example, if the power line to which resistor R1 is connected is
When "off" occurs, the current flowing through the resistor R1 becomes zero, the current flowing through the resistor R2 becomes +i, and the output voltage of the amplifier section 4a becomes 0V.
, the output voltage of the amplifying section 4b is 5V. The values obtained by A/D converting these output voltages by the A/D converter 7 are compared by the comparing means of the calculation section 6, and it is determined that the voltage is an abnormal voltage on the positive side power supply line.
【０００６】なお、電流検出抵抗Ｒ１〜Ｒ４自体の異常
又は増幅部４ａ〜４ｄ自体の異常の場合には、各増幅部
の出力電圧は殆どの場合０Ｖあるいは５Ｖとなるので、
電源線「断」と抵抗異常、増幅部異常とを識別すること
は不可能である。[0006] Note that in the case of an abnormality in the current detection resistors R1 to R4 themselves or in the amplifying sections 4a to 4d themselves, the output voltage of each amplifying section will be 0V or 5V in most cases.
It is impossible to distinguish between a power line disconnection, a resistance abnormality, or an amplifier abnormality.
【０００７】このように、図４の回路においては、電源
線の１本が断となったときその検知が可能であり、これ
により、ＥＣＵの機能破壊によるシステムダウンを事前
に防止するものである。[0007] In this manner, the circuit shown in FIG. 4 can detect when one of the power supply lines is disconnected, thereby preventing a system down due to functional breakdown of the ECU. .
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、従来の
電源系統の故障検知装置は、４本の電源線に対応して電
流検出抵抗と増幅部を４系統有しているので部品点数が
多く、コスト上、信頼性上も問題があった。[Problems to be Solved by the Invention] However, the conventional failure detection device for a power supply system has four systems of current detection resistors and amplification sections corresponding to four power supply lines, so it has a large number of parts and is expensive. On top of that, there were also problems with reliability.
【０００９】本発明は上記事情に鑑みてなされたもので
あり、その目的とするところは、簡単な構成により部品
点数を少なくして、コスト低減、信頼性の向上を図るこ
とができる電源系統の故障検知装置を提供することにあ
る。The present invention has been made in view of the above circumstances, and its purpose is to provide a power supply system that has a simple configuration, reduces the number of parts, reduces costs, and improves reliability. An object of the present invention is to provide a failure detection device.
【００１０】0010
【課題を解決するための手段】上記目的を達成するため
に本発明は、バッテリと、該バッテリの出力電圧を安定
化させる電圧レギュレータと、バッテリのプラス側端子
と電圧レギュレータのプラス側端子とを接続する複数の
プラス側電源線と、前記バッテリのマイナス側端子と前
記電圧レギュレータのマイナス側端子とを接続する複数
のマイナス側電源線とを有する電源系統の故障検知装置
において、所定数の前記プラス側電源線とこれと同一本
数の前記マイナス側電源線との電源線対に流れる電流に
よって発生する合成磁界の値を検出する磁気センサと、
この磁気センサの出力信号値と所定値とを比較する比較
手段と、該比較手段の比較結果に応じて前記電源系統に
故障が生じたか否かを判別する判別手段とを備えるよう
にしたものである。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a battery, a voltage regulator that stabilizes the output voltage of the battery, and a positive terminal of the battery and a positive terminal of the voltage regulator. A failure detection device for a power supply system having a plurality of positive power supply lines to be connected and a plurality of negative power supply lines to be connected to a negative terminal of the battery and a negative terminal of the voltage regulator. a magnetic sensor that detects the value of a composite magnetic field generated by a current flowing in a power line pair of a side power line and the same number of negative side power lines;
The apparatus includes a comparison means for comparing the output signal value of the magnetic sensor with a predetermined value, and a determination means for determining whether or not a failure has occurred in the power supply system according to the comparison result of the comparison means. be.
【００１１】[0011]
【作用】本発明による電源系統の故障検知装置において
は、プラス側電源線とこれと同一本数のマイナス側電源
線との電源線対に流れる電流によって発生する合成磁界
の値を検出し、この検出値と所定値とを比較し、この比
較結果に応じて電源系統に故障が生じたか否かを判別す
る。これにより、電源線の故障検知のための電流検出系
統を一系統とすることができ、故障検知装置を簡単な構
成とすることができる。[Operation] In the power supply system failure detection device according to the present invention, the value of the composite magnetic field generated by the current flowing in the power line pair of the positive side power line and the same number of negative side power lines is detected. The value is compared with a predetermined value, and based on the comparison result, it is determined whether or not a failure has occurred in the power supply system. Thereby, the current detection system for detecting a failure in the power supply line can be reduced to one system, and the failure detection device can have a simple configuration.
【００１２】0012
【実施例】以下、本発明の実施例を図面を用いて説明す
る。Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.
【００１３】図１は、本発明による電源系統の故障検知
装置の一実施例を示すブロック図である。同図において
、バッテリ１の正極端子はヒューズ２を介して電源回路
５の端子Ｔ３，Ｔ４とプラス側電源線１２ａ，１２ｂに
より接続され、バッテリ１の負極端子Ｔ２は電源回路５
の端子Ｔ５，Ｔ６とマイナス側電源線１２ｃ，１２ｄに
より接続されている。プラス側電源線１２ｂとマイナス
側電源線１２ｃは磁気センサ１１内部を貫通している。
該磁気センサ１１は、オフセット機能を有する増幅部４
の入力側と接続され、増幅部４の出力側は演算部６のＡ
／Ｄ変換器７に接続されている。その他の要素は図４の
対応する要素と同様であり、同一符号を付してあり、説
明を省略する。FIG. 1 is a block diagram showing an embodiment of a failure detection device for a power supply system according to the present invention. In the figure, the positive terminal of the battery 1 is connected to the terminals T3, T4 of the power supply circuit 5 through the fuse 2 by positive power supply lines 12a, 12b, and the negative terminal T2 of the battery 1 is connected to the terminals T3, T4 of the power supply circuit 5 through the fuse 2.
The terminals T5 and T6 are connected to the terminals T5 and T6 by negative power supply lines 12c and 12d. The positive power line 12b and the negative power line 12c penetrate inside the magnetic sensor 11. The magnetic sensor 11 includes an amplifying section 4 having an offset function.
The output side of the amplifier section 4 is connected to the input side of the arithmetic section 6.
/D converter 7. Other elements are the same as the corresponding elements in FIG. 4, are given the same reference numerals, and will not be described further.
【００１４】図２は磁気センサ１１の一例を示す略図で
あり、２０は内部を２本の電源線１２ｂと１２ｃが貫通
しているトロイダルコア、２１はホール素子である。ホ
ール素子２１の出力電圧Ｖは、FIG. 2 is a schematic diagram showing an example of the magnetic sensor 11, in which 20 is a toroidal core through which two power lines 12b and 12c pass, and 21 is a Hall element. The output voltage V of the Hall element 21 is
【００１５】[0015]
【数１】Ｖ＝ＫＢＩと表わせる。ここに、Ｋは定数、Ｂ
はトロイダルコア２０によりホール素子２１中に生じ、
トロイダルコア２０の貫通電流に比例する磁本密度、Ｉ
はホール素子２１を流れる定電流である。このようにし
て、Ｂに比例した出力電圧Ｖを得ることができる。[Equation 1] It can be expressed as V=KBI. Here, K is a constant, B
is generated in the Hall element 21 by the toroidal core 20,
Magnetic book density, I, which is proportional to the through current of the toroidal core 20
is a constant current flowing through the Hall element 21. In this way, an output voltage V proportional to B can be obtained.
【００１６】次に、上述のように構成された電源系統の
故障検知装置の動作について説明する。正常動作時は、
従来例と同様に、プラス側電源線１２ａ，１２ｂにはそ
れぞれ、バッテリ１からの電流ｉを等分した＋ｉ／２の
電流が流れ、マイナス側電源線１２ｃ、１２ｄにはそれ
ぞれバッテリ１への電流−ｉを等分した−ｉ／２の電流
が流れる。電源線１２ｂには＋ｉ／２が流れ、電源線１
２ｃには−ｉ／２が流れているので、これらの電流和は
零であり、これらの電流による合成磁界の値も零となり
、磁気センサ１１の出力信号ａのレベルは０Ｖとなる。
増幅部４には０Ｖの出力信号ａが入力されるが、例えば
２．５Ｖのオフセットがかかっているので、このオフセ
ット分の電圧２．５Ｖが増幅部４から出力される。
増幅部４の出力信号ｂはＡ／Ｄ変換器７に入力されてデ
ジタル信号となり、その値が演算部６の比較手段で所定
基準値と比較される。所定基準値とは、例えば図３に示
すように０．２５Ｖ，１．７５Ｖ，３．２５Ｖ，４．７
５Ｖであり、１．７５Ｖと３．２５Ｖとの間は正常領域
Ｓ１、３．２５Ｖと４．７５Ｖとの間はプラス側の電源
系故障領域Ｓ２、１．７５Ｖと０．２５Ｖとの間はマイ
ナス側の電源系故障領域Ｓ３、４．７５Ｖと５Ｖとの間
はプラス側の磁気センサ故障領域Ｓ４、０．２５Ｖと０
Ｖとの間はマイナス側の磁気センサ故障領域Ｓ５である
。図３において、レベルＳＡは正常動作時の増幅部４の
出力信号ｂの理想的レベル２．５Ｖを示し、レベルＳＢ
，ＳＣは電源線「断」時の理想的レベル４Ｖ，１Ｖをそ
れぞれ示す。正常動作時には、出力信号ｂのレベルは増
幅部４のオフセット電圧２．５Ｖに対応して約２．５Ｖ
であるので、正常領域Ｓ１の範囲内であり、演算部６の
比較手段は正常と判断する。Next, the operation of the power system failure detection device configured as described above will be explained. During normal operation,
Similar to the conventional example, a current of +i/2, which is equal to the current i from the battery 1, flows through the positive power supply lines 12a and 12b, and a current to the battery 1 flows through the negative power supply lines 12c and 12d, respectively. A current of -i/2, which is equal to -i, flows. +i/2 flows through the power line 12b, and the power line 1
Since -i/2 is flowing through 2c, the sum of these currents is zero, the value of the composite magnetic field due to these currents is also zero, and the level of the output signal a of the magnetic sensor 11 is 0V. The output signal a of 0V is input to the amplification section 4, but since an offset of, for example, 2.5V is applied, a voltage of 2.5V corresponding to this offset is outputted from the amplification section 4. The output signal b of the amplification section 4 is input to the A/D converter 7 to become a digital signal, and the value thereof is compared with a predetermined reference value by the comparison means of the calculation section 6. The predetermined reference values are, for example, 0.25V, 1.75V, 3.25V, 4.7V as shown in FIG.
5V, between 1.75V and 3.25V is the normal area S1, between 3.25V and 4.75V is the positive side power system failure area S2, and between 1.75V and 0.25V is the normal area S1. The power supply system failure area S3 on the negative side, between 4.75V and 5V, is the magnetic sensor failure area S4 on the positive side, 0.25V and 0.
The area between this and V is the negative side magnetic sensor failure area S5. In FIG. 3, level SA indicates the ideal level 2.5V of the output signal b of the amplifier section 4 during normal operation, and level SB
, SC indicate ideal levels of 4V and 1V, respectively, when the power line is "off". During normal operation, the level of the output signal b is approximately 2.5V, corresponding to the offset voltage of 2.5V of the amplifier section 4.
Therefore, it is within the normal region S1, and the comparison means of the calculation unit 6 determines that it is normal.
【００１７】次に、電源線「断」時の動作、例えば電源
線１２ａの「断」時の動作について説明する。電源線１
２ａが「断」となると、電源線１２ａを流れる電流は零
となり、従って電源線１２ｂを流れる電流はバッテリ１
からの全電流＋ｉとなる。電源線１２ｃ，１２ｄを流れ
る電流は正常動作時と同じである。これにより、磁気セ
ンサ１１の内部を貫通する電流は電源線１２ｂの＋ｉと
電源線１２ｃの−ｉ／２との合計＋ｉ／２となり、これ
に対応した磁界が磁気センサ１１に生じ、磁気センサ１
１は＋ｉ／２に対応したレベル例えば１．５Ｖの出力信
号ａを出力する。増幅部４は、１．５Ｖの信号ａを入力
することにより、オフセットが２．５Ｖであることから
、４Ｖの信号ｂを出力する。演算部６の比較手段は信号
ｂが領域Ｓ２のレベルの信号であることを検出し、電源
系故障すなわちプラス側の電源線「断」であると判断す
る。そして、故障表示器８にプラス側の電源線が「断」
であることが表示される。このようにして、電源線の「
断」が検出され、システムダウンを事前に防止すること
ができる。Next, the operation when the power line 12a is "off" will be described, for example, the operation when the power line 12a is "off". Power line 1
2a becomes "disconnected", the current flowing through the power supply line 12a becomes zero, and therefore the current flowing through the power supply line 12b decreases from the battery 1.
The total current from +i. The currents flowing through the power supply lines 12c and 12d are the same as during normal operation. As a result, the current passing through the inside of the magnetic sensor 11 becomes +i/2, which is the sum of +i of the power line 12b and -i/2 of the power line 12c, and a corresponding magnetic field is generated in the magnetic sensor 11.
1 outputs an output signal a of a level corresponding to +i/2, for example, 1.5V. By inputting the 1.5V signal a, the amplifier section 4 outputs the 4V signal b since the offset is 2.5V. The comparison means of the arithmetic unit 6 detects that the signal b is at the level of the region S2, and determines that there is a failure in the power supply system, that is, the positive power line is "broken." Then, the positive power line is “broken” on the fault indicator 8.
is displayed. In this way, the power line
A system failure can be detected and a system failure can be prevented in advance.
【００１８】同様にして、電源線１２ｂ，１２ｃ，１２
ｄのそれぞれの「断」を検出可能である。このことを表
に示す。このように、本実施例においては４本の電源線
に対して一つの磁気センサで対応できるので、構成も簡
単になり、コストダウンを図ることもできる。なお、上
記実施例では電源線４本の場合について示したが、６本
以上についても同様に対応できることは明らかである。Similarly, the power lines 12b, 12c, 12
It is possible to detect each "break" of d. This is shown in the table. In this way, in this embodiment, one magnetic sensor can be used for four power supply lines, so the configuration can be simplified and costs can be reduced. In the above embodiment, the case where there are four power supply lines is shown, but it is clear that the case where there are six or more power supply lines can be handled in the same manner.
【００１９】[0019]
【表１】
次に、磁気センサ１１の故障の場合について説明す
る。磁気センサ１１から増幅部４を介してＡ／Ｄ変換器
７までの経路のいずれかにおいて伝染がオープンあるい
はショート（グランド又は電源ラインとのショート）し
た場合においては、殆どの場合、Ａ／Ｄ変換器７の出力
は最大電位、たとえば５Ｖあるいは最小電位、たとえば
０Ｖとなる。この場合、演算部６の比較手段は電源系統
の状態が図２の領域Ｓ４あるいはＳ５にあることを検知
し、これにより磁気センサ１１の故障と判断する。この
ように図１の実施例においては磁気センサの故障も検出
可能であり、図１と比べて構成が簡単であるのみならず
、ＥＣＵ３の信頼性を更に高めることができる。[Table 1] Next, a case where the magnetic sensor 11 fails will be described. In most cases, if the transmission is open or shorted (short to ground or power line) in any of the paths from the magnetic sensor 11 to the A/D converter 7 via the amplifier 4, the A/D conversion will be interrupted. The output of the device 7 is at the maximum potential, for example 5V, or at the minimum potential, for example 0V. In this case, the comparing means of the calculation unit 6 detects that the state of the power supply system is in the region S4 or S5 in FIG. 2, and thereby determines that the magnetic sensor 11 is malfunctioning. In this way, in the embodiment shown in FIG. 1, it is possible to detect a failure of the magnetic sensor, and the structure is not only simpler than that in FIG. 1, but also the reliability of the ECU 3 can be further improved.
【００２０】[0020]
【発明の効果】以上説明したように本発明は、バッテリ
と、該バッテリの出力電圧を安定化させる電圧レギュレ
ータと、バッテリのプラス側端子と電圧レギュレータの
プラス側端子とを接続する複数のプラス側電源線と、前
記バッテリのマイナス側端子と前記電圧レギュレータの
マイナス側端子とを接続する複数のマイナス側電源線と
を有する電源系統の故障検知装置において、所定数の前
記プラス側電源線とこれと同一本数の前記マイナス側電
源線との電源線対に流れる電流によって発生する合成磁
界の値を検出する磁気センサと、この磁気センサの出力
信号値と所定値とを比較する比較手段と、該比較手段の
比較結果に応じて前記電源系統に故障が生じたか否かを
判別する判別手段とを備えたことにより、電源線の故障
検知のための電流検出系統を一系統とすることができる
ので、構成が簡単となり、コストダウンを図ることがで
き、また部品点数の減少による信頼性の向上を図ること
もできる効果がある。As explained above, the present invention provides a battery, a voltage regulator that stabilizes the output voltage of the battery, and a plurality of positive terminals that connect the positive terminal of the battery and the positive terminal of the voltage regulator. A failure detection device for a power supply system having a power supply line and a plurality of negative power supply lines connecting a negative terminal of the battery and a negative terminal of the voltage regulator, wherein a predetermined number of the positive power supply lines and A magnetic sensor that detects the value of a composite magnetic field generated by a current flowing in a power line pair with the same number of negative side power line, a comparison means that compares an output signal value of this magnetic sensor with a predetermined value, and the comparison means. By providing a determining means for determining whether or not a failure has occurred in the power supply system according to a comparison result of the means, the current detection system for detecting a failure in the power supply line can be reduced to one system. The structure is simplified, costs can be reduced, and reliability can be improved by reducing the number of parts.
【図１】本発明の一実施例に係る電源系統の故障検知装
置を示すブロック図である。FIG. 1 is a block diagram showing a failure detection device for a power supply system according to an embodiment of the present invention.
【図２】磁気センサの一例を示す略図である。FIG. 2 is a schematic diagram showing an example of a magnetic sensor.
【図３】正常、異常の各領域を示す説明図である。FIG. 3 is an explanatory diagram showing normal and abnormal regions.
【図４】従来の電源系統の故障検知装置を示す回路図で
ある。FIG. 4 is a circuit diagram showing a conventional failure detection device for a power supply system.
１ バッテリ ２ ヒューズ ３ ＥＣＵ ４ 増幅部 ５ 電源回路（電圧レギュレータ） ６ 演算部 ７ Ａ／Ｄ変換器 ８ 故障表示器 ９ 入力線 １０ 出力線 １１ 磁気センサ １２ａ〜１２ｄ 電源線 1 Battery 2 Fuse 3 ECU 4 Amplification section 5 Power supply circuit (voltage regulator) 6 Arithmetic section 7 A/D converter 8 Malfunction indicator 9 Input line 10 Output line 11 Magnetic sensor 12a-12d Power line
Claims (4)
安定化させる電圧レギュレータと、バッテリのプラス側
端子と電圧レギュレータのプラス側端子とを接続する複
数のプラス側電源線と、前記バッテリのマイナス側端子
と前記電圧レギュレータのマイナス側端子とを接続する
複数のマイナス側電源線とを有する電源系統の故障検知
装置において、所定数の前記プラス側電源線とこれと同
一本数の前記マイナス側電源線との電源線対に流れる電
流によって発生する合成磁界の値を検出する磁気センサ
と、この磁気センサの出力信号値と所定値とを比較する
比較手段と、該比較手段の比較結果に応じて前記電源系
統に故障が生じたか否かを判別する判別手段とを備えた
ことを特徴とする電源系統の故障検知装置。1. A battery, a voltage regulator that stabilizes the output voltage of the battery, a plurality of positive power supply lines connecting a positive terminal of the battery and a positive terminal of the voltage regulator, and a negative side of the battery. In a failure detection device for a power supply system having a plurality of negative power supply lines connecting a terminal and a negative terminal of the voltage regulator, a predetermined number of the positive power supply lines and the same number of negative power supply lines; a magnetic sensor for detecting the value of a composite magnetic field generated by a current flowing through a pair of power supply lines; a comparison means for comparing an output signal value of the magnetic sensor with a predetermined value; What is claimed is: 1. A failure detection device for a power supply system, comprising: determination means for determining whether or not a failure has occurred in the system.
結果に応じて、前記複数のプラス側電源線および前記複
数のマイナス側電源線のいずれかに断線が生じたか否か
を判別することを特徴とする請求項１記載の電源系統の
故障検知装置。2. The determining means determines whether a disconnection has occurred in any of the plurality of positive power supply lines and the plurality of negative power supply lines, according to the comparison result of the comparison means. A failure detection device for a power supply system according to claim 1.
結果に応じて、前記磁気センサが故障しているか否かを
判別することを特徴とする請求項１記載の電源系統の故
障検知装置。3. The failure detection device for a power supply system according to claim 1, wherein the determining means determines whether or not the magnetic sensor is malfunctioning in accordance with the comparison result of the comparing means.
イダルコアとから成ることを特徴とする請求項１乃至３
のいずれかに記載の電源系統の故障検知装置。4. Claims 1 to 3, wherein the magnetic sensor comprises a Hall element and a toroidal core.
A failure detection device for a power supply system according to any one of the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2414926A JPH04251523A (en) | 1990-12-27 | 1990-12-27 | Detecting device for failure in power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2414926A JPH04251523A (en) | 1990-12-27 | 1990-12-27 | Detecting device for failure in power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04251523A true JPH04251523A (en) | 1992-09-07 |
Family
ID=18523350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2414926A Pending JPH04251523A (en) | 1990-12-27 | 1990-12-27 | Detecting device for failure in power system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04251523A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015013575A (en) * | 2013-07-05 | 2015-01-22 | 西日本旅客鉄道株式会社 | Railway signal cable disconnection detector |
| KR101539398B1 (en) * | 2014-07-16 | 2015-07-27 | 장상호 | Remotely controlled magnetic sensing type line fault indicator |
-
1990
- 1990-12-27 JP JP2414926A patent/JPH04251523A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015013575A (en) * | 2013-07-05 | 2015-01-22 | 西日本旅客鉄道株式会社 | Railway signal cable disconnection detector |
| KR101539398B1 (en) * | 2014-07-16 | 2015-07-27 | 장상호 | Remotely controlled magnetic sensing type line fault indicator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109416382B (en) | Grounding loss detection circuit | |
| JP4296811B2 (en) | Physical quantity sensor device | |
| JPH0373212B2 (en) | ||
| US8154312B2 (en) | Sensor system | |
| US20100289499A1 (en) | Monitoring device for monitoring a terminal of a terminal component | |
| US4253056A (en) | Ground fault detector for DC power supply | |
| US5610532A (en) | Isolated DC fault current sensor | |
| EP0723161B1 (en) | Trouble monitor device for bridge circuit | |
| US4945336A (en) | Trouble detection apparatus for automobile air-bag system | |
| JPH04251523A (en) | Detecting device for failure in power system | |
| SE466172B (en) | DEVICE FOR THE PREPARATION OF A VARIOUS CURRENT RESPONSIBLE FOR A DEVICE APPLIED | |
| CN111123106B (en) | Sensor and method for checking a sensor | |
| JP5989171B1 (en) | CURRENT DETECTION CIRCUIT AND ELECTRIC CONTROL DEVICE FOR VEHICLE HAVING THE CIRCUIT | |
| US5315256A (en) | Fault detection circuit for use in determining the existence of a fault in any one of a plurality of DC loads | |
| US5034681A (en) | Voltage detection | |
| JPH04238272A (en) | Power supply circuit with leakage current detecting function | |
| JPH02157915A (en) | Fault detector for analog output circuit | |
| US11592511B2 (en) | Methods and systems for diagnosing magnetic sensors | |
| JPS6357851A (en) | Detecting device for throttle valve opening | |
| JP3812693B2 (en) | Vehicle driving state detection device | |
| JPS6049417A (en) | Overcurrent detecting circuit | |
| JPH0142054Y2 (en) | ||
| JP4803161B2 (en) | Power transistor circuit | |
| JP2692135B2 (en) | Load control device | |
| SU974589A2 (en) | Majority device for discriminating vector quantity projections |