JPH03122319U - - Google Patents
Info
- Publication number
- JPH03122319U JPH03122319U JP3028690U JP3028690U JPH03122319U JP H03122319 U JPH03122319 U JP H03122319U JP 3028690 U JP3028690 U JP 3028690U JP 3028690 U JP3028690 U JP 3028690U JP H03122319 U JPH03122319 U JP H03122319U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- position sensor
- converts
- voltage
- capacitive position
- 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 2
- 239000002184 metal Substances 0.000 description 3
- 238000010586 diagram Methods 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図は従来から用いられている静電容量式位
置センサー、第２図は本考案の静電容量式位置セ
ンサーの回路方式、第３図は本考案の各部動作波
形、第４図は本考案による静電容量式位置センサ
のセンサ位置対出力電圧特性図である。第１図に
於いて１は円筒状金属ケース、２は誘電体筒、３
は金属棒、４は誘電体筒内孔、５，６はリード端
子、第２図に於いてＳはスイツチ、Ｃは静電容量
式センサ、Ｒは抵抗である。
Figure 1 shows a conventionally used capacitive position sensor, Figure 2 shows the circuit system of the capacitive position sensor of the present invention, Figure 3 shows the operating waveforms of each part of the present invention, and Figure 4 shows the present invention. FIG. 3 is a sensor position versus output voltage characteristic diagram of the capacitive position sensor according to the invention. In Fig. 1, 1 is a cylindrical metal case, 2 is a dielectric cylinder, and 3 is a cylindrical metal case.
4 is a metal rod, 4 is a dielectric cylinder inner hole, 5 and 6 are lead terminals, in FIG. 2, S is a switch, C is a capacitive sensor, and R is a resistor.
Claims (1)
式位置センサの位置検出回路において、基本周期
を得るための定周波発振器と、該定周波発振器出
力を基本周期とし、前記静電容量式位置センサの
静電容量をＰＷＭ波形出力に変換する回路と、前
記ＰＷＭ波形を平均化し直流電圧とする回路と、
該直流電圧を増幅し外部へ出力する回路を有する
ことを特徴とする静電容量式位置センサの位置検
出装置。 In a position detection circuit for a capacitive position sensor whose capacitance changes due to a change in length, a constant frequency oscillator is used to obtain a fundamental period, and the output of the constant frequency oscillator is used as the fundamental period to detect the capacitive position sensor. a circuit that converts the capacitance of the sensor into a PWM waveform output; a circuit that averages the PWM waveform and converts it into a DC voltage;
A position detection device for a capacitive position sensor, comprising a circuit that amplifies the DC voltage and outputs it to the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3028690U JPH03122319U (en) | 1990-03-23 | 1990-03-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3028690U JPH03122319U (en) | 1990-03-23 | 1990-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03122319U true JPH03122319U (en) | 1991-12-13 |
Family
ID=31533010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3028690U Pending JPH03122319U (en) | 1990-03-23 | 1990-03-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03122319U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011139781A (en) * | 2010-01-07 | 2011-07-21 | Hoya Corp | Position sensor, position control system, and endoscope apparatus |
| JP2011203074A (en) * | 2010-03-25 | 2011-10-13 | Yamaha Corp | Apparatus for detecting displacement position of electromagnetic actuator |
-
1990
- 1990-03-23 JP JP3028690U patent/JPH03122319U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011139781A (en) * | 2010-01-07 | 2011-07-21 | Hoya Corp | Position sensor, position control system, and endoscope apparatus |
| JP2011203074A (en) * | 2010-03-25 | 2011-10-13 | Yamaha Corp | Apparatus for detecting displacement position of electromagnetic actuator |
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