JPH03117943U - - Google Patents
Info
- Publication number
- JPH03117943U JPH03117943U JP2660790U JP2660790U JPH03117943U JP H03117943 U JPH03117943 U JP H03117943U JP 2660790 U JP2660790 U JP 2660790U JP 2660790 U JP2660790 U JP 2660790U JP H03117943 U JPH03117943 U JP H03117943U
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- compensation
- detection
- output
- proximity switch
- 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 description 7
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 9
- 230000002277 temperature effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Description
第１図はこの考案の一実施例による近接スイツ
チのブロツク図、第２図はフイルタ６の特性を示
す図、第３図はバリキヤツプＣＶの逆方向電圧と
静電容量の関係を示す図、第４図は第１図の温度
補償回路の温度効果を示す図、第５図は他の実施
例による近接スイツチの温度補償回路部分を示す
図、第６図は第５図の温度補償回路の温度補償効
果を示す図、第７図は他の実施例におけるフイル
タの特性を示す図、第８図は従来の近接スイツチ
の動作を説明するための図である。
ＣＶ……バリキヤツプ、Ｌ……検出用コイル、
Ｃ２……補償用コンデンサ、Ｒ４，ＲＰＴＣ……
第１の抵抗、ＲＮＴＣ……第２の抵抗。
FIG. 1 is a block diagram of a proximity switch according to an embodiment of this invention, FIG. 2 is a diagram showing the characteristics of the filter 6, FIG. 3 is a diagram showing the relationship between the reverse voltage and capacitance of the variable cap CV, and FIG. Figure 4 is a diagram showing the temperature effect of the temperature compensation circuit of Figure 1, Figure 5 is a diagram showing the temperature compensation circuit portion of a proximity switch according to another embodiment, and Figure 6 is a diagram showing the temperature effect of the temperature compensation circuit of Figure 5. FIG. 7 is a diagram showing the compensation effect, FIG. 7 is a diagram showing the characteristics of a filter in another embodiment, and FIG. 8 is a diagram for explaining the operation of a conventional proximity switch. CV...varicap, L...detection coil,
C 2 ... Compensation capacitor, R 4 , RPTC...
First resistor, RNTC...second resistor.
Claims (1)
備えた発振回路を備え、発振回路の出力に基づき
検出出力を出すよう構成された近接スイツチにお
いて、 補償用抵抗と補償用コンデンサを直列接続した
ものを、検出用インダクタンスに対して並列に接
続して温度補償を行うものであつて、 補償用抵抗は、第１の抵抗と負温度係数を有す
る第２の抵抗とを並列接続して構成されることを
特徴とする近接スイツチ。 (2) コンデンサおよび検出用インダクタンスを
備えた発振回路を備え、発振回路の出力に基づき
検出出力を出すよう構成された近接スイツチにお
いて、 補償用抵抗と補償用コンデンサを直列接続した
ものを、検出用インダクタンスに対して並列に接
続して温度補償を行うものであつて、 補償用抵抗は、正温度係数を有する第１の抵抗
と負温度係数を有する第２の抵抗とを並列接続し
て構成されることを特徴とする近接スイツチ。[Scope of Claim for Utility Model Registration] (1) In a proximity switch equipped with an oscillation circuit equipped with a capacitor and a detection inductance and configured to output a detection output based on the output of the oscillation circuit, a compensation resistor and a compensation capacitor are provided. Temperature compensation is performed by connecting the resistors connected in series in parallel to the detection inductance, and the compensating resistor is composed of a first resistor and a second resistor having a negative temperature coefficient connected in parallel. A proximity switch characterized by comprising: (2) In a proximity switch that is equipped with an oscillation circuit equipped with a capacitor and a detection inductance, and is configured to output a detection output based on the output of the oscillation circuit, a compensation resistor and a compensation capacitor connected in series are used for detection. The compensation resistor is connected in parallel to the inductance to perform temperature compensation, and the compensation resistor is configured by connecting in parallel a first resistor having a positive temperature coefficient and a second resistor having a negative temperature coefficient. A proximity switch characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2660790U JPH03117943U (en) | 1990-03-14 | 1990-03-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2660790U JPH03117943U (en) | 1990-03-14 | 1990-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03117943U true JPH03117943U (en) | 1991-12-05 |
Family
ID=31529491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2660790U Pending JPH03117943U (en) | 1990-03-14 | 1990-03-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03117943U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4796076B2 (en) * | 2005-01-13 | 2011-10-19 | ペッパール ウント フュフス ゲゼルシャフト ミット ベシュレンクテル ハフツング | Proximity detection switch and method of operating the same |
-
1990
- 1990-03-14 JP JP2660790U patent/JPH03117943U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4796076B2 (en) * | 2005-01-13 | 2011-10-19 | ペッパール ウント フュフス ゲゼルシャフト ミット ベシュレンクテル ハフツング | Proximity detection switch and method of operating the same |