JPH0283412U - - Google Patents
Info
- Publication number
- JPH0283412U JPH0283412U JP16385688U JP16385688U JPH0283412U JP H0283412 U JPH0283412 U JP H0283412U JP 16385688 U JP16385688 U JP 16385688U JP 16385688 U JP16385688 U JP 16385688U JP H0283412 U JPH0283412 U JP H0283412U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- coils
- detection section
- sine wave
- pair
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 230000010356 wave oscillation Effects 0.000 claims 2
- 230000007423 decrease Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 1
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
第１図は本考案の具体的な一実施例に係る寸法
測定装置の電気的構成を示したブロツクダイヤグ
ラム。第２図は同実施例における断線及び短絡に
対する寸法測定装置の検出部の出力信号ＥＣ、ピ
ーク値保持回路の出力信号ＥＰ、その比較判定モ
ードを説明するためのマトリツクス図。第３図ａ
は寸法測定装置の検出部における一対のコイルに
対するコアの変位ｘを示した説明図。第３図ｂは
第３図ａの変位に対する一対のコイルの各々のイ
ンピーダンスの変化を示した説明図。第３図ｃは
第３図ａの変位に対するアナログ出力の変化を示
した説明図。第４図は従来の寸法測定装置の電気
的構成を示したブロツクダイヤグラムである。
１１……検出部、１４……加算回路、２０……
ピーク値保持回路、２１……上限値比較回路、２
２……下限値比較回路、２３……ＯＲ回路、ＣＬ
１，ＣＬ２……コイル、ＣＲ……コア。
FIG. 1 is a block diagram showing the electrical configuration of a dimension measuring device according to a specific embodiment of the present invention. FIG. 2 is a matrix diagram for explaining the output signal EC of the detection section of the dimension measuring device, the output signal EP of the peak value holding circuit, and the comparison and determination mode for wire breaks and short circuits in the same embodiment. Figure 3a
FIG. 2 is an explanatory diagram showing the displacement x of the core with respect to a pair of coils in the detection section of the dimension measuring device. FIG. 3b is an explanatory diagram showing the change in impedance of each of the pair of coils with respect to the displacement shown in FIG. 3a. FIG. 3c is an explanatory diagram showing the change in analog output with respect to the displacement in FIG. 3a. FIG. 4 is a block diagram showing the electrical configuration of a conventional dimension measuring device. 11...detection section, 14...addition circuit, 20...
Peak value holding circuit, 21... Upper limit comparison circuit, 2
2...Lower limit comparison circuit, 23...OR circuit, CL
1, CL2...Coil, CR...Core.
Claims (1)
する直列接続された一対のコイルから成る検出部
と、正弦波を発生させ前記検出部の一対のコイル
の一端に印加する正弦波発振回路と、前記正弦波
発振回路にて発生された正弦波を位相反転して前
記検出部の一対のコイルの他端に印加する位相反
転回路と、前記検出部の一対のコイルの接続点か
らの出力信号を増幅する増幅回路とから成る寸法
測定装置において、 変位に応じて振幅の変化する交流波形の前記出
力信号が変位検出領域において、常に、正又は負
何れか一方の電位となるようなオフセツト電圧を
前記正弦波に加算して前記コイルの一方に印加す
る電圧印加回路と、 前記増幅回路にて増幅された前記検出部の出力
信号の絶対値のピーク値を保持するピーク値保持
回路と、 前記ピーク値保持回路にてピーク値保持された
信号が予め設定された一定範囲に存在するか否か
を判定し、一定範囲に存在しない時には、警報信
号を出力する判定回路と を備えたことを特徴とする寸法測定装置。[Claims for Utility Model Registration] A detection section consisting of a pair of series-connected coils whose impedance increases or decreases depending on the displacement of the core, and a sine wave that generates a sine wave and applies it to one end of the pair of coils of the detection section. a wave oscillation circuit; a phase inversion circuit that inverts the phase of a sine wave generated by the sine wave oscillation circuit and applies the inverted signal to the other end of the pair of coils in the detection section; and a connection point between the pair of coils in the detection section; and an amplifier circuit for amplifying an output signal from the dimensional measuring device, the output signal having an alternating current waveform whose amplitude changes depending on the displacement is always at either a positive or negative potential in the displacement detection area. a voltage application circuit that adds an offset voltage to the sine wave and applies it to one of the coils; and a peak value holding circuit that holds the peak value of the absolute value of the output signal of the detection section amplified by the amplifier circuit. and a determination circuit that determines whether or not the signal whose peak value is held in the peak value holding circuit exists within a preset certain range, and outputs an alarm signal when the signal does not exist within the certain range. A dimension measuring device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16385688U JPH0631362Y2 (en) | 1988-12-17 | 1988-12-17 | Dimension measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16385688U JPH0631362Y2 (en) | 1988-12-17 | 1988-12-17 | Dimension measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0283412U true JPH0283412U (en) | 1990-06-28 |
| JPH0631362Y2 JPH0631362Y2 (en) | 1994-08-22 |
Family
ID=31448959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16385688U Expired - Fee Related JPH0631362Y2 (en) | 1988-12-17 | 1988-12-17 | Dimension measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0631362Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007170987A (en) * | 2005-12-22 | 2007-07-05 | Keyence Corp | Contact type displacement gauge |
-
1988
- 1988-12-17 JP JP16385688U patent/JPH0631362Y2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007170987A (en) * | 2005-12-22 | 2007-07-05 | Keyence Corp | Contact type displacement gauge |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0631362Y2 (en) | 1994-08-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |