Electrostatic capacitance tilt angle sensor
First Claim
1. A sensor for detecting tilt angle, the sensor comprising:
- a case including a first wall and a second wall facing each other;
a common electrode arranged on the first wall;
a differential electrode arranged on the second wall; and
a liquid electrostatic capacitance medium accommodated in the case and contacting the common electrode and the differential electrode, wherein the electrostatic capacitance medium includes an insulative liquid base and fine particles that are mixed in the base and have a higher dielectric constant than the base.
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Accused Products
Abstract
An electrostatic capacitance tilt angle sensor having a size that is reduced without lowering detection capacity. The sensor is provided with a case including a first wall and a second wall facing each other. A common electrode is arranged on the first wall and a differential electrode is arranged on the second wall. A liquid electrostatic capacitance medium is accommodated in the case and contacts the common electrode and the differential electrode. The electrostatic capacitance medium includes an insulative liquid base and fine particles mixed in the base. The fine particles have a dielectric constant that is higher than that of the base.
16 Citations
20 Claims
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1. A sensor for detecting tilt angle, the sensor comprising:
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a case including a first wall and a second wall facing each other;
a common electrode arranged on the first wall;
a differential electrode arranged on the second wall; and
a liquid electrostatic capacitance medium accommodated in the case and contacting the common electrode and the differential electrode, wherein the electrostatic capacitance medium includes an insulative liquid base and fine particles that are mixed in the base and have a higher dielectric constant than the base. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A sensor for detecting tilt angle, the sensor comprising:
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a case including a first wall and a second wall, which face each other, and a central portion;
a common electrode arranged on the first wall;
a differential electrode arranged on the second wall;
a liquid electrostatic capacitance medium accommodated in the case and contacting the common electrode and the differential electrode; and
a projection arranged on at least one of the common electrode and the differential electrode in at least the vicinity of the central portion of the case. - View Dependent Claims (11, 12, 13, 14)
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15. A sensor for detecting tilt angle, the sensor comprising:
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a case including a first wall and a second wall facing each other;
a common electrode arranged on the first wall;
a differential electrode arranged on the second wall;
a liquid electrostatic capacitance medium accommodated in the case and contacting the common electrode and the differential electrode; and
a plurality of bosses spaced from one another by a predetermined interval and arranged between the common electrode and the differential electrode. - View Dependent Claims (16, 17, 18, 19)
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20. A sensor for detecting tilt angle, the sensor comprising:
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a case including a first wall and a second wall, which face each other, and a central portion;
a common electrode arranged on the first wall;
a differential electrode arranged on the second wall;
a liquid electrostatic capacitance medium accommodated in the case and contacting the common electrode and the differential electrode;
a cylindrical first boss arranged in the central portion of the case; and
a plurality of second bosses arranged symmetrically with respect to the center of the case about the first boss.
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Specification