JPH04242174A - Trouble discriminator for detector - Google Patents

Trouble discriminator for detector

Info

Publication number
JPH04242174A
JPH04242174A JP3069558A JP6955891A JPH04242174A JP H04242174 A JPH04242174 A JP H04242174A JP 3069558 A JP3069558 A JP 3069558A JP 6955891 A JP6955891 A JP 6955891A JP H04242174 A JPH04242174 A JP H04242174A
Authority
JP
Japan
Prior art keywords
level
output
circuit
signal
output signal
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.)
Granted
Application number
JP3069558A
Other languages
Japanese (ja)
Other versions
JP2915158B2 (en
Inventor
Yoshinori Uchida
内田 吉則
Rei Sekiguchi
玲 関口
Yasuhiro Sato
康弘 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bosch Corp
Original Assignee
Zexel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zexel Corp filed Critical Zexel Corp
Priority to JP3069558A priority Critical patent/JP2915158B2/en
Publication of JPH04242174A publication Critical patent/JPH04242174A/en
Application granted granted Critical
Publication of JP2915158B2 publication Critical patent/JP2915158B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

PURPOSE:To achieve checking of operation of a detector accurately by checking a signal level at a required point inside the apparatus simultaneously in addition to an output signal level checking of the detector. CONSTITUTION:This trouble discriminator 20 is provided with a first discriminating section 21 to judge whether a level of a detection output signal OS is within a first level predetermined and a second discriminating section 22 to judge whether an amplification output signal DO is within a second level range predetermined. First and second discrimination signals S1 and S2 indicating the results of discrimination are inputted into a judging section 23 and when at least one of the detection output signal OS and the amplification output signal DO deviates from a required level range, a signal F indicating that a device 1 breaks down is outputted from the judging section 23. This achieves a checking of operation of a detector accurately.

Description

【発明の詳細な説明】[Detailed description of the invention]

【0001】0001

【産業上の利用分野】本発明は、被測定物理量によって
定められる可変インダクタンス素子のインダクタンス値
に応じたレベルの信号を出力するように構成された検出
装置の故障判別装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure determination device for a detection device configured to output a signal at a level corresponding to the inductance value of a variable inductance element determined by a physical quantity to be measured.

【0002】0002

【従来の技術】従来、可変インダクタンス素子のインダ
クタンスが被検出物体の位置、角度等の物理量に応じて
定められる構成とし、この可変インダクタンス素子のイ
ンダクタンス値に応じたレベルの電気信号を得るように
した、物理量を電気量に変換するための検出装置が公知
である(例えば、特開昭56−60304号公報参照)
。この種の検出装置が正常に作動しているか否かを判別
するには、従来、その出力信号のレベルが所定範囲内に
あるか否かを検出し、出力信号のレベルが所定範囲内に
ある場合にのみ検出装置が正常に作動していると判別す
る構成が公知である。
[Prior Art] Conventionally, the inductance of a variable inductance element is determined according to physical quantities such as the position and angle of an object to be detected, and an electrical signal of a level corresponding to the inductance value of the variable inductance element is obtained. , a detection device for converting a physical quantity into an electrical quantity is known (for example, see Japanese Patent Application Laid-Open No. 1983-60304).
. Conventionally, to determine whether this type of detection device is operating normally, it is necessary to detect whether the level of its output signal is within a predetermined range. A configuration is known in which it is determined that the detection device is operating normally only when the detection device is operating normally.

【0003】0003

【発明が解決しようとする課題】しかし、故障の状態に
よっては、出力信号のレベルがその所定範囲内で固定さ
れてしまう場合もありうるため、出力信号のレベルのみ
を考慮して行う上述の故障判別は必ずしも適切とは言え
ず、その判別の信頼度に問題があった。本発明の目的は
、したがって、検出すべき物理量に応じてインダクタン
ス値が定められる可変インダクタンス素子と所定の一定
インダクタンス値の基準インダクタンス素子との直列回
路に交流信号を供給し、可変インダクタンス素子のイン
ダクタンス値と基準インダクタンス素子のインダクタン
ス値との比率に応じた信号に基づいて上記物理量を電気
的に検出するようにした検出装置の作動の異常判別を適
確に行うことができる、故障判別装置を提供することに
ある。
[Problem to be Solved by the Invention] However, depending on the state of the fault, the level of the output signal may be fixed within a predetermined range. The discrimination was not necessarily appropriate, and there were problems with the reliability of the discrimination. Therefore, an object of the present invention is to supply an alternating current signal to a series circuit of a variable inductance element whose inductance value is determined according to a physical quantity to be detected and a reference inductance element having a predetermined constant inductance value, and to detect the inductance value of the variable inductance element. To provide a failure determination device that can accurately determine abnormality in the operation of a detection device that electrically detects the physical quantity based on a signal corresponding to the ratio of the inductance value of the inductance value and the inductance value of a reference inductance element. There is a particular thing.

【0004】0004

【課題を解決するための手段】上記課題を解決するため
の本発明の特徴は、検出すべき物理量に応じてインダク
タンス値が定められる可変インダクタンス素子と所定の
一定インダクタンス値の基準インダクタンス素子との直
列回路と、該直列回路に交流信号を供給するための出力
レベル可変形の信号供給回路と、基準インダクタンス素
子の両端に生じる出力信号のレベルを検出する検出回路
と、該検出回路からの検出出力に応答し前記出力信号の
レベルが所定の一定値となるように信号供給回路の出力
レベルを調節するためのレベル調節回路と、信号供給回
路からの出力に応答し前記物理量を示す検出信号を得る
ための出力回路とを有して成る検出装置の故障判別装置
において、レベル調節回路からの出力のレベルと出力回
路からの出力のレベルとが夫々所要の範囲内にあるか否
かを判別し、この判別結果に従って検出装置が故障か否
かを判定するようにした点にある。
[Means for Solving the Problems] A feature of the present invention for solving the above problems is that a variable inductance element whose inductance value is determined according to a physical quantity to be detected is connected in series with a reference inductance element having a predetermined constant inductance value. a circuit, a variable output level signal supply circuit for supplying an alternating current signal to the series circuit, a detection circuit for detecting the level of an output signal generated at both ends of the reference inductance element, and a detection output from the detection circuit. a level adjustment circuit for adjusting the output level of the signal supply circuit in response to the output signal so that the level of the output signal becomes a predetermined constant value; and for obtaining a detection signal indicating the physical quantity in response to the output from the signal supply circuit. A failure determination device for a detection device comprising an output circuit, which determines whether the level of the output from the level adjustment circuit and the level of the output from the output circuit are respectively within required ranges; The present invention is characterized in that it is determined whether the detection device is malfunctioning or not according to the determination result.

【0005】[0005]

【作用】出力回路からの出力のレベルのほか、レベル調
節回路からの出力のレベルが所要のレベル範囲内にある
か否かが判別される。両出力レベルが、夫々に対して予
め定められた所要の範囲内にある場合には、検出装置は
正常に作動していると判別される。一方、少なくとも一
方の出力のレベルがそれに対して予め定められているレ
ベル範囲外であれば、検出装置の作動に異常があるもの
と判別される。
[Operation] In addition to the level of the output from the output circuit, it is determined whether the level of the output from the level adjustment circuit is within a required level range. If both output levels are within their respective predetermined required ranges, it is determined that the detection device is operating normally. On the other hand, if the level of at least one of the outputs is outside the predetermined level range, it is determined that there is an abnormality in the operation of the detection device.

【0006】[0006]

【実施例】以下、図面を参照しながら、本発明の一実施
例につき詳細に説明する。図1には、本発明による故障
判別装置を備えた位置検出システムの一実施例が示され
ている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an embodiment of a position detection system equipped with a failure determination device according to the present invention.

【0007】図1において、被測定体Xの位置を検出す
るための検出装置が総体的に符号1で示されており、被
測定体Xとリンク機構Lを介して連結されている可変コ
イル2を備えている。可変コイル2は、巻線3と可動コ
ア4とから成り、可動コア4がリンク機構Lと連結され
ており、被測定体Xの位置に応じて可動コア4が位置決
めされる構成となっている。この結果、被測定体Xの位
置に応じて可変コイル2のインダクタンス値が定められ
る。
In FIG. 1, a detection device for detecting the position of the object to be measured X is generally designated by the reference numeral 1, and includes a variable coil 2 connected to the object to be measured X via a link mechanism L. It is equipped with The variable coil 2 is composed of a winding 3 and a movable core 4, and the movable core 4 is connected to a link mechanism L, so that the movable core 4 is positioned according to the position of the object to be measured X. . As a result, the inductance value of the variable coil 2 is determined according to the position of the object to be measured X.

【0008】可変コイル2は、インダクタンス値が所定
の一定値に固定されている基準コイル5と直列に接続さ
れており、可変コイル2と基準コイル5との直列回路6
には、出力レベル可変型の発振回路7からの交流出力電
圧である電圧出力信号VAが印加されている。
The variable coil 2 is connected in series with a reference coil 5 whose inductance value is fixed at a predetermined constant value, and a series circuit 6 of the variable coil 2 and the reference coil 5 is formed.
A voltage output signal VA, which is an AC output voltage from an oscillation circuit 7 of a variable output level type, is applied to.

【0009】電圧出力信号VAが直列回路6に印加され
ることにより、電圧出力信号VAは、可変コイル2のイ
ンダクタンス値と基準コイル5のインダクタンス値とに
よって定まる分圧比で分圧され、基準コイル5の両端に
は、この分圧比に従う分圧出力電圧VDが発生する。
By applying the voltage output signal VA to the series circuit 6, the voltage output signal VA is divided by a voltage division ratio determined by the inductance value of the variable coil 2 and the inductance value of the reference coil 5, and A divided output voltage VD according to this voltage division ratio is generated across the voltage.

【0010】分圧出力電圧VDは、整流回路8に入力さ
れ、ここで分圧出力電圧VDの波高値に応じたレベルの
直流出力電圧DCに変換され、直流出力電圧DCは増幅
回路9に入力される。
The divided output voltage VD is input to a rectifier circuit 8, where it is converted to a DC output voltage DC at a level corresponding to the peak value of the divided output voltage VD, and the DC output voltage DC is input to an amplifier circuit 9. be done.

【0011】増幅回路9は、直流出力電圧DCが一方の
入力端子に印加されている演算増幅器10と、抵抗器1
1,12から成り演算増幅器10の他方の入力端子に所
定レベルの基準電圧を印加するための抵抗分圧回路13
とを含んで成り、直流出力電圧DCの増幅を行ない、そ
の増幅出力信号DOが増幅回路9から得られる。
The amplifier circuit 9 includes an operational amplifier 10 to which a DC output voltage DC is applied to one input terminal, and a resistor 1.
1 and 12, and a resistive voltage divider circuit 13 for applying a reference voltage of a predetermined level to the other input terminal of the operational amplifier 10.
The amplification circuit 9 amplifies the direct current output voltage DC, and the amplified output signal DO is obtained from the amplifier circuit 9.

【0012】増幅出力信号DOは、発振回路7に、その
電圧出力信号VAのレベルを制御するためのレベル制御
信号として与えられており、可変コイル2のインダクタ
ンスが変化しても分圧出力電圧VDのレベルが所定の一
定レベルに保持されるよう、電圧出力信号VAのレベル
調節が行われる。
The amplified output signal DO is given to the oscillation circuit 7 as a level control signal for controlling the level of the voltage output signal VA, and even if the inductance of the variable coil 2 changes, the divided output voltage VD remains unchanged. The level of the voltage output signal VA is adjusted so that the level of the voltage output signal VA is maintained at a predetermined constant level.

【0013】この結果、電圧出力信号VAのレベルは、
可変コイル2のインダクタンス値、すなわち、被測定体
Xの位置に相応することとなる。
As a result, the level of the voltage output signal VA is
This corresponds to the inductance value of the variable coil 2, that is, the position of the object X to be measured.

【0014】電圧出力信号VAは、整流回路14におい
て整流されてそれに相応する直流電圧信号に変換され、
しかるのち、増幅回路15において増幅され、出力端子
16から、被測定体Xの位置に応じたレベルの直流電圧
信号が検出出力信号OSとして取り出される。
The voltage output signal VA is rectified in a rectifier circuit 14 and converted into a corresponding DC voltage signal,
Thereafter, it is amplified in the amplifier circuit 15, and a DC voltage signal having a level corresponding to the position of the object to be measured X is taken out from the output terminal 16 as the detection output signal OS.

【0015】符号20で示されるのは、検出装置1が正
常に作動しているか否かを判別するための本発明による
故障判別装置であり、検出出力信号OSのレベルが予め
定められた第1のレベル範囲内にあるか否かの判別を行
う第1判別部21と、増幅出力信号DOが予め定められ
た第2のレベルの範囲内にあるか否かの判別を行う第2
判別部22とを備えている。
Reference numeral 20 indicates a failure determination device according to the present invention for determining whether or not the detection device 1 is operating normally. A first determining unit 21 determines whether the amplified output signal DO is within a predetermined second level range, and a second determining unit 21 determines whether the amplified output signal DO is within a predetermined second level range.
The determination unit 22 is also provided.

【0016】第1のレベル範囲は、検出装置1が正常に
作動している場合には検出信号OSが必ずこの内にある
筈のレベル範囲であり、一方、第2のレベル範囲は、検
出装置1が正常に作動している場合には増幅出力信号D
Oが必ずこの内にある筈のレベル範囲であり、これらの
レベル範囲は、実験的に、又は計算によって予め定める
ことができる。
The first level range is a level range within which the detection signal OS should be if the detection device 1 is operating normally, while the second level range is a level range within which the detection signal OS should be if the detection device 1 is operating normally. 1 is operating normally, the amplified output signal D
O is a level range within which the range must be, and these level ranges can be determined in advance experimentally or by calculation.

【0017】第1判別部21の判別結果を示す第1判別
信号S1及び第2判別部の判別結果を示す第2判別信号
S2は判定部23に入力され、ここで、検出出力信号O
S又は増幅出力信号DOのうちの少なくとも一方が所要
のレベル範囲を逸脱しているか否かが判定される。検出
出力信号OS又は増幅出力信号DOのうちの少なくとも
一方が所要のレベル範囲を逸脱している場合には、検出
装置1が故障であることを示す故障信号Fが判定部23
より出力される。
The first discrimination signal S1 indicating the discrimination result of the first discrimination section 21 and the second discrimination signal S2 indicating the discrimination result of the second discrimination section are input to the judgment section 23, where the detection output signal O
It is determined whether at least one of S or amplified output signal DO is outside a required level range. If at least one of the detection output signal OS or the amplified output signal DO deviates from the required level range, a failure signal F indicating that the detection device 1 is in failure is detected by the determination unit 23.
It is output from

【0018】この構成によると、例えば、増幅回路9の
出力がアースに接続されてしまうことにより、発振回路
7の出力レベルはある一定値に固定されてしまうが検出
出力信号OSのレベルは所要の範囲内にあるという状態
が生じた場合でも、この故障を確実に判別することがで
きる。
According to this configuration, for example, since the output of the amplifier circuit 9 is connected to the ground, the output level of the oscillation circuit 7 is fixed at a certain constant value, but the level of the detection output signal OS is fixed at a certain value. Even if a condition within the range occurs, this failure can be reliably determined.

【0019】なお、図1に示した故障判別装置20の構
成は、マイクロコンピュータによって所定のプログラム
を実行させる構成に代えることが可能であり、本発明の
故障判別装置は、そのような構成でもよいことは勿論で
ある。
The configuration of the failure determination device 20 shown in FIG. 1 can be replaced with a configuration in which a predetermined program is executed by a microcomputer, and the failure determination device of the present invention may have such a configuration. Of course.

【0020】[0020]

【発明の効果】本発明によれば、上述の如く、検出装置
の出力信号のレベルチェックに加えて、検出装置内部の
所要の箇所の信号のレベルをも同時にチェックし、これ
らのチェック結果に従って検出装置が正常に作動してい
るか否かを判定するようにしたので、検出装置の作動チ
ェックを適確に行うことができる。
According to the present invention, as described above, in addition to checking the level of the output signal of the detection device, the level of the signal at a required location inside the detection device is also checked at the same time, and detection is performed according to the results of these checks. Since it is determined whether or not the device is operating normally, the operation of the detection device can be accurately checked.

【図面の簡単な説明】[Brief explanation of the drawing]

【図1】本発明の一実施例を示すブロック図。FIG. 1 is a block diagram showing one embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1  検出装置 2  可変コイル 5  基準コイル 6  直列回路 7  発振回路 8  整流回路 9  増幅回路 20  故障判別装置 21  第1判別部 22  第2判別部 23  判定部 VA  電圧出力信号 VD  分圧出力電圧 DO  増幅出力信号 OS  検出出力信号 S1  第1判別信号 S2  第2判別信号 F  故障信号 1 Detection device 2 Variable coil 5 Reference coil 6 Series circuit 7 Oscillation circuit 8 Rectifier circuit 9 Amplification circuit 20 Malfunction determination device 21 First discrimination section 22 Second discrimination section 23 Judgment section VA voltage output signal VD Divided output voltage DO Amplified output signal OS detection output signal S1 First discrimination signal S2 Second discrimination signal F Fault signal

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】  検出すべき物理量に応じてインダクタ
ンス値が定められる可変インダクタンス素子と所定の一
定インダクタンス値の基準インダクタンス素子との直列
回路と、該直列回路に交流信号を供給するための出力レ
ベル可変形の信号供給回路と、前記基準インダクタンス
素子の両端に生じる出力信号のレベルを検出する検出回
路と、該検出回路からの検出出力に応答し前記出力信号
のレベルが所定の一定値となるように前記信号供給回路
の出力レベルを調節するためのレベル調節回路と、前記
信号供給回路からの出力に応答し前記物理量を示す検出
信号を得るための出力回路とを有して成る検出装置の故
障判別装置において、前記レベル調節回路からの出力の
レベルと前記出力回路からの出力のレベルとが夫々所要
の範囲内にあるか否かを判別し、この判別結果に従って
前記検出装置が故障か否かを判定するようにしたことを
特徴とする検出装置の故障判別装置。
1. A series circuit comprising a variable inductance element whose inductance value is determined according to a physical quantity to be detected and a reference inductance element having a predetermined constant inductance value, and an output level variable for supplying an alternating current signal to the series circuit. a modified signal supply circuit; a detection circuit for detecting the level of an output signal generated at both ends of the reference inductance element; Failure determination of a detection device comprising a level adjustment circuit for adjusting the output level of the signal supply circuit, and an output circuit for obtaining a detection signal indicating the physical quantity in response to the output from the signal supply circuit. The device determines whether the level of the output from the level adjustment circuit and the level of the output from the output circuit are within required ranges, and determines whether or not the detection device is malfunctioning based on the determination result. 1. A failure determination device for a detection device, characterized in that it makes a determination.
JP3069558A 1991-01-11 1991-01-11 Failure detection device for detection device Expired - Lifetime JP2915158B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3069558A JP2915158B2 (en) 1991-01-11 1991-01-11 Failure detection device for detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3069558A JP2915158B2 (en) 1991-01-11 1991-01-11 Failure detection device for detection device

Publications (2)

Publication Number Publication Date
JPH04242174A true JPH04242174A (en) 1992-08-28
JP2915158B2 JP2915158B2 (en) 1999-07-05

Family

ID=13406202

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3069558A Expired - Lifetime JP2915158B2 (en) 1991-01-11 1991-01-11 Failure detection device for detection device

Country Status (1)

Country Link
JP (1) JP2915158B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004294442A (en) * 2003-03-26 2004-10-21 Hamilton Sundstrand Corp Engine speed sensor with fault detection
JP2007170987A (en) * 2005-12-22 2007-07-05 Keyence Corp Contact type displacement gauge
JP2008209230A (en) * 2007-02-26 2008-09-11 Matsushita Electric Works Ltd Detection system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004294442A (en) * 2003-03-26 2004-10-21 Hamilton Sundstrand Corp Engine speed sensor with fault detection
JP2007170987A (en) * 2005-12-22 2007-07-05 Keyence Corp Contact type displacement gauge
JP2008209230A (en) * 2007-02-26 2008-09-11 Matsushita Electric Works Ltd Detection system
JP4710848B2 (en) * 2007-02-26 2011-06-29 パナソニック電工株式会社 Detection system

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