JPH0124566Y2 - - Google Patents
Info
- Publication number
- JPH0124566Y2 JPH0124566Y2 JP1982087063U JP8706382U JPH0124566Y2 JP H0124566 Y2 JPH0124566 Y2 JP H0124566Y2 JP 1982087063 U JP1982087063 U JP 1982087063U JP 8706382 U JP8706382 U JP 8706382U JP H0124566 Y2 JPH0124566 Y2 JP H0124566Y2
- Authority
- JP
- Japan
- Prior art keywords
- excitation
- output signal
- circuit
- comparator
- coil
- 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.)
- Expired
Links
- 230000005284 excitation Effects 0.000 claims description 45
- 238000001514 detection method Methods 0.000 claims description 15
- 230000006698 induction Effects 0.000 claims description 6
- 230000001939 inductive effect Effects 0.000 claims description 4
- 230000005856 abnormality Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004092 self-diagnosis Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
Description
【考案の詳細な説明】
本考案は、誘導式測定器に関するものであつ
て、励磁コイル及び励磁回路の故障が識別できる
自己診断形の誘導式測定器を提供するものであ
る。[Detailed Description of the Invention] The present invention relates to an inductive measuring instrument, and provides a self-diagnosis type inductive measuring instrument that can identify failures in an excitation coil and an excitation circuit.
流速や温度、変位等を測定する測定器の一種
に、励磁コイルと検出コイルとを組み合わせた誘
導式測定器がある。 One type of measuring device that measures flow velocity, temperature, displacement, etc. is an induction measuring device that combines an excitation coil and a detection coil.
第１図は、このような誘導式測定器の具体例を
示す構成説明図であつて、ａは渦電流式流速計の
例を示し、ｂは渦電流式変位計の例を示し、ｃは
差動トランス式測定器の例を示している。これら
図面において、１は励磁電源、２は励磁コイル、
３，４は検出コイル、５，６は増幅器、７は差演
算回路、８は和演算回路、９は温度補償回路、１
０は導電性を有する被測定流体の流れ方向、１１
は導電性を有する被測定対象、１２はコア、１３
は変位伝達機構、T1〜T4は出力端子である。ａ
の構成によれば出力端子T1には流速信号が送出
されて出力端子T2には温度信号が送出され、ｂ
の構成によれば出力端子T3には被測定対象１１
と検出コイル３との間の距離ｘに関連した変位信
号が送出され、ｃの構成によれば変位伝達機構１
３を介してコア１２に伝達される被測定対象の変
位、圧力、差圧、力等に関連した変位信号が送出
される。 FIG. 1 is a configuration explanatory diagram showing a specific example of such an induction type measuring instrument, in which a shows an example of an eddy current type current meter, b shows an example of an eddy current type displacement meter, and c shows an example of an eddy current type displacement meter. An example of a differential transformer type measuring instrument is shown. In these drawings, 1 is an excitation power source, 2 is an excitation coil,
3 and 4 are detection coils, 5 and 6 are amplifiers, 7 is a difference calculation circuit, 8 is a sum calculation circuit, 9 is a temperature compensation circuit, 1
0 is the flow direction of the conductive fluid to be measured, 11
is a conductive object to be measured, 12 is a core, 13
is a displacement transmission mechanism, and T 1 to T 4 are output terminals. a
According to the configuration, a flow velocity signal is sent to the output terminal T1 , a temperature signal is sent to the output terminal T2 , and b
According to the configuration, the object to be measured 11 is connected to the output terminal T3 .
A displacement signal related to the distance x between the detection coil 3 and the detection coil 3 is sent out, and according to the configuration c
A displacement signal related to the displacement, pressure, differential pressure, force, etc. of the object to be measured is transmitted to the core 12 via the core 12.
ところで、このような誘導式測定器における故
障の態様として、励磁電源１の故障、励磁コイル
２の断線、検出コイル３，４の断線、増幅器５，
６の故障、差演算回路７の故障、和演算回路８の
故障、温度補償回路９の故障等が考えられる。こ
のような装置が故障した場合、どの部分が故障し
たのかが識別できると、修理がやりやすくなる。
本考案の出願人は、励磁コイル２及び検出コイル
３，４の断線検出に関する考案を実願昭54−
175799号（実公昭58−50272号）として出願して
いる。しかし、この先願考案では、励磁電源１を
含む励磁回路の故障か励磁コイル１の故障かを識
別することはできない。 By the way, failures in such induction measuring instruments include failure of the excitation power supply 1, disconnection of the excitation coil 2, disconnection of the detection coils 3 and 4, and failure of the amplifier 5,
6, a failure in the difference calculation circuit 7, a failure in the sum calculation circuit 8, a failure in the temperature compensation circuit 9, etc. If such a device breaks down, it will be easier to repair it if it is possible to identify which part has broken down.
The applicant of the present invention proposed a device for detecting disconnection of the excitation coil 2 and the detection coils 3 and 4 in 1973-
It has been filed as No. 175799 (Utility Model Publication No. 58-50272). However, in this prior invention, it is not possible to identify whether the failure is in the excitation circuit including the excitation power source 1 or in the excitation coil 1.
本考案は、このような従来の欠点を解決したも
のであつて、励磁コイルと検出コイルとを組合わ
せた誘導式測定器において、
励磁回路の出力信号を励磁コイルまたは検出コ
イルに選択的に切り換えて供給する切換スイツチ
と、
切り換え供給時の励磁回路の出力信号の大きさ
を基準値と比較する比較器と、
この比較器の出力信号を保持し、その出力信号
により前記励磁信号系の切換スイツチを駆動する
保持回路と、
前記励磁回路および励磁コイルに対応するよう
に設けられた２個の表示素子と、
これら表示素子を点灯するための電源と、
この電源の出力系統に接続され、前記保持回路
の出力信号により開閉駆動されるスイツチと、
前記比較器の出力信号により駆動され、前記ス
イツチから出力される電源出力を前記表示素子に
選択的に印加する切換スイツチを具備し、
前記励磁回路または励磁コイルの異常検出に応
じて対応する前記表示素子を選択的に点灯するこ
とを特徴とする。 The present invention solves these conventional drawbacks, and is designed to selectively switch the output signal of the excitation circuit to the excitation coil or the detection coil in an induction measuring instrument that combines an excitation coil and a detection coil. a comparator that compares the magnitude of the output signal of the excitation circuit with a reference value during switching supply; and a comparator that holds the output signal of this comparator and uses the output signal to switch the excitation signal system. a holding circuit for driving the holding circuit; two display elements provided to correspond to the excitation circuit and the excitation coil; a power source for lighting these display elements; a switch that is driven to open and close by an output signal of the circuit; and a changeover switch that is driven by the output signal of the comparator and selectively applies the power output output from the switch to the display element; The present invention is characterized in that the corresponding display element is selectively turned on in response to detection of an abnormality in the excitation coil.
以下、図面を用いて詳細に説明する。 Hereinafter, it will be explained in detail using the drawings.
第２図は、本考案の一実施例を示す構成説明図
であつて、第１図と同等部分には同一符号を付し
ている。第２図において、１４は抵抗、１５は整
流回路、１６は比較器、１７は保持回路、１８，
１９，２２，２３は切換スイツチ、２０はスイツ
チ、２１は直流電源、２４，２５は表示ランプで
ある。 FIG. 2 is a configuration explanatory diagram showing an embodiment of the present invention, and the same parts as in FIG. 1 are given the same reference numerals. In FIG. 2, 14 is a resistor, 15 is a rectifier circuit, 16 is a comparator, 17 is a holding circuit, 18,
19, 22, and 23 are changeover switches; 20 is a switch; 21 is a DC power source; and 24, 25 are display lamps.
励磁電源１の一端は切換スイツチ１８の可動接
点ａに接続され、他端は抵抗１４を介して切換ス
イツチ１９の可動接点ａに接続されている。な
お、切換スイツチ１８の一方の固定接点ｂは励磁
コイル２の一端に接続され、他方の固定接点ｃは
検出コイル４の一端に接続されている。また、切
換スイツチ１９の一方の固定接点ｂは励磁コイル
２の他端に接続され、他方の固定接点ｃは検出コ
イル４の他端に接続されている。これら切換スイ
ツチ１８，１９は、保持回路１７の出力信号に従
つて連動駆動される。抵抗１４の両端の電圧は整
流回路１５に加えられて整流平滑され、比較器１
６に加えられる。比較器１６の出力信号は、保持
回路１７に加えられると共に切換スイツチ２２，
２３に駆動信号として加えられる。保持回路１７
の出力信号は、切換スイツチ１８，１９及びスイ
ツチ２０に駆動信号として加えられる。直流電源
２１は表示ランプ２４，２５を点灯するためのも
のであつて、陽極はスイツチ２０を介して切換ス
イツチ２２の可動接点ａに接続され、陰極は切換
スイツチ２３の可動接点ａに接続されている。な
お、切換スイツチ２２の一方の固定接点ｂは表示
ランプ２４の一端に接続され、他方の固定接点ｃ
は表示ランプ２５の一端に接続されている。ま
た、切換スイツチ２３の一方の固定接点ｂは表示
ランプ２４の他端に接続され、他方の固定接点ｃ
は表示ランプ２５の他端に接続されている。これ
ら切換スイツチ２２，２３は、比較器１６の出力
信号に従つて連動駆動される。 One end of the excitation power source 1 is connected to a movable contact a of a changeover switch 18, and the other end is connected to a movable contact a of a changeover switch 19 via a resistor 14. Note that one fixed contact b of the changeover switch 18 is connected to one end of the excitation coil 2, and the other fixed contact c is connected to one end of the detection coil 4. Further, one fixed contact b of the changeover switch 19 is connected to the other end of the excitation coil 2 , and the other fixed contact c is connected to the other end of the detection coil 4 . These changeover switches 18 and 19 are driven in conjunction with each other according to the output signal of the holding circuit 17. The voltage across the resistor 14 is applied to the rectifier circuit 15 where it is rectified and smoothed, and the voltage across the resistor 14 is rectified and smoothed.
Added to 6. The output signal of the comparator 16 is applied to the holding circuit 17 and the changeover switch 22,
23 as a drive signal. Holding circuit 17
The output signal is applied to changeover switches 18, 19 and switch 20 as a drive signal. The DC power supply 21 is for lighting the indicator lamps 24 and 25, and has an anode connected to a movable contact a of a changeover switch 22 via a switch 20, and a cathode connected to a movable contact a of a changeover switch 23. There is. Note that one fixed contact b of the changeover switch 22 is connected to one end of the indicator lamp 24, and the other fixed contact c
is connected to one end of the indicator lamp 25. Further, one fixed contact b of the changeover switch 23 is connected to the other end of the indicator lamp 24, and the other fixed contact c
is connected to the other end of the indicator lamp 25. These changeover switches 22 and 23 are driven in conjunction with each other according to the output signal of the comparator 16.
このように構成された装置の動作について説明
する。 The operation of the device configured in this way will be explained.
正常動作状態では、切換スイツチ１８，１９の
可動接点ａは固定接点ｂ側に接続され、スイツチ
２０は開離されている。これにより、励磁電源１
は励磁コイル２に接続され、表示ランプ２４，２
５は点灯されない。また、比較器１６からは正常
動作状態を表わす信号（例えばＨレベル信号）が
送出されている。このような正常動作状態から、
抵抗１４に電流が流れなくなると、抵抗１４の両
端の電圧は零になり、比較器１６が動作して保持
回路１７及び切換スイツチ２２，２３に異常動作
を表わす信号（例えばＬレベル信号）を送出す
る。一方、保持回路１７は、切換スイツチ１８，
１９の可動接点ａを固定接点ｃに切り換えるため
の駆動信号を送出すると共に、スイツチ２０を閉
成するための駆動信号を送出する。なお、保持回
路１７は、新たな異常動作を表わす信号が入力さ
れるまでその状態を保持するように構成されてい
る。このようにして切換スイツチ１８，１９の可
動接点ａが固定接点ｃに切り換えられた状態での
比較器１６の出力信号に従つて、励磁コイル２の
断線及び励磁電源１、抵抗１４を含む励磁回路の
故障を識別することができる。すなわち、比較器
１６の出力信号が正常動作を表わす信号レベルに
復旧すると励磁コイル２が断線していて励磁回路
は正常であることがわかり、比較器１６の出力信
号が異常動作を表わす信号レベルを持続している
と励磁回路が異常であることがわかる。ここで、
例えば表示ランプ２４は比較器１６の出力信号が
正常動作を表わしている時に点灯され、表示ラン
プ２５は比較器１６の出力信号が異常動作を表わ
している時に点灯されるようにしておくことによ
り、表示ランプ２４の点灯で励磁コイル２の断線
が表示でき、表示ランプ２５の点灯で励磁回路の
故障が表示できる。 In the normal operating state, the movable contacts a of the changeover switches 18 and 19 are connected to the fixed contacts b, and the switch 20 is opened. As a result, the excitation power supply 1
is connected to the excitation coil 2, and the indicator lamps 24, 2
5 is not lit. Further, the comparator 16 sends out a signal (for example, an H level signal) representing a normal operating state. From this normal operating state,
When the current stops flowing through the resistor 14, the voltage across the resistor 14 becomes zero, and the comparator 16 operates and sends a signal (for example, an L level signal) indicating abnormal operation to the holding circuit 17 and the changeover switches 22 and 23. do. On the other hand, the holding circuit 17 is connected to the changeover switch 18,
A drive signal for switching the movable contact a of the switch 19 to a fixed contact c is sent out, and a drive signal for closing the switch 20 is sent out. Note that the holding circuit 17 is configured to hold the state until a signal indicating a new abnormal operation is input. In this way, according to the output signal of the comparator 16 in a state where the movable contacts a of the changeover switches 18 and 19 are switched to the fixed contacts c, the excitation coil 2 is disconnected and the excitation circuit including the excitation power supply 1 and the resistor 14 failures can be identified. That is, when the output signal of the comparator 16 returns to a signal level representing normal operation, it is found that the excitation coil 2 is disconnected and the excitation circuit is normal, and the output signal of the comparator 16 returns to a signal level representing abnormal operation. If it continues, it indicates that the excitation circuit is abnormal. here,
For example, the indicator lamp 24 is lit when the output signal of the comparator 16 indicates normal operation, and the indicator lamp 25 is lit when the output signal of the comparator 16 indicates abnormal operation. A break in the excitation coil 2 can be indicated by lighting the indicator lamp 24, and a failure in the excitation circuit can be indicated by lighting the indicator lamp 25.
以上説明したように、本考案によれば、励磁コ
イル及び励磁回路の故障が識別できる自己診断形
の誘導式測定器が実現でき、実用上の効果は大き
い。 As explained above, according to the present invention, a self-diagnosis type induction measuring instrument that can identify failures in the excitation coil and excitation circuit can be realized, and the practical effects are great.
第１図は誘導式測定器の具体例を示す構成説明
図、第２図は本考案の一実施例を示す構成説明図
である。
１……励磁電源、２……励磁コイル、４……検
出コイル、１４……抵抗、１５……整流回路、１
６……比較器、１７……保持回路、１８，１９，
２２，２３……切換スイツチ、２０……スイツ
チ、２１……直流電源、２４，２５……表示ラン
プ。
FIG. 1 is a structural explanatory diagram showing a specific example of an inductive measuring instrument, and FIG. 2 is a structural explanatory diagram showing an embodiment of the present invention. 1... Excitation power supply, 2... Excitation coil, 4... Detection coil, 14... Resistor, 15... Rectifier circuit, 1
6... Comparator, 17... Holding circuit, 18, 19,
22, 23... Selector switch, 20... Switch, 21... DC power supply, 24, 25... Display lamp.
Claims (1)
式測定器において、 励磁回路の出力信号を励磁コイルまたは検出コ
イルに選択的に切り換えて供給する切換スイツチ
と、 切り換え供給時の励磁回路の出力信号の大きさ
を基準値と比較する比較器と、 この比較器の出力信号を保持し、その出力信号
により前記励磁信号系の切換スイツチを駆動する
保持回路と、 前記励磁回路および励磁コイルに対応するよう
に設けられた２個の表示素子と、 これら表示素子を点灯するための電源と、 この電源の出力系統に接続され、前記保持回路
の出力信号により開閉駆動されるスイツチと、 前記比較器の出力信号により駆動され、前記ス
イツチから出力される電源出力を前記表示素子に
選択的に印加する切換スイツチを具備し、 前記励磁回路または励磁コイルの異常検出に応
じて対応する前記表示素子を選択的に点灯するこ
とを特徴とする誘導式測定器。[Scope of Claim for Utility Model Registration] In an induction measuring device that combines an excitation coil and a detection coil, a changeover switch that selectively switches and supplies an output signal of an excitation circuit to the excitation coil or the detection coil; a comparator that compares the magnitude of the output signal of the excitation circuit with a reference value; a holding circuit that holds the output signal of the comparator and drives the changeover switch of the excitation signal system with the output signal; the excitation circuit; Two display elements provided to correspond to the excitation coil, a power source for lighting these display elements, and a switch connected to the output system of this power source and driven to open and close by the output signal of the holding circuit. , comprising a changeover switch that is driven by the output signal of the comparator and selectively applies the power output output from the switch to the display element, and that corresponds to the detection of abnormality in the excitation circuit or excitation coil. An inductive measuring instrument characterized by selectively lighting up a display element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8706382U JPS58189916U (en) | 1982-06-11 | 1982-06-11 | Inductive measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8706382U JPS58189916U (en) | 1982-06-11 | 1982-06-11 | Inductive measuring instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58189916U JPS58189916U (en) | 1983-12-16 |
| JPH0124566Y2 true JPH0124566Y2 (en) | 1989-07-25 |
Family
ID=30095807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8706382U Granted JPS58189916U (en) | 1982-06-11 | 1982-06-11 | Inductive measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58189916U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007170987A (en) * | 2005-12-22 | 2007-07-05 | Keyence Corp | Contact type displacement gauge |
| CN107000974B (en) * | 2014-11-27 | 2019-05-07 | 三菱电机株式会社 | The position detecting device of elevator |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5188251A (en) * | 1975-01-31 | 1976-08-02 | Ijokenshutsukanona koryuburitsujishikihenikenshutsusochi |
-
1982
- 1982-06-11 JP JP8706382U patent/JPS58189916U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5188251A (en) * | 1975-01-31 | 1976-08-02 | Ijokenshutsukanona koryuburitsujishikihenikenshutsusochi |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58189916U (en) | 1983-12-16 |
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