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Electrostatic capacity type liquid sensor

一种液体传感器、静电电容的技术，应用在仪器、测绘与导航、测量装置等方向，能够解决很难长期确保传感器稳定性和可靠性等问题

Inactive Publication Date: 2005-09-14
UBUKATA IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the problem of the stability of the chemically formed aluminum film, it is difficult to ensure the stability and reliability of the sensor for a long time

Method used

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  • Electrostatic capacity type liquid sensor
  • Electrostatic capacity type liquid sensor
  • Electrostatic capacity type liquid sensor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0039] A first embodiment of the present invention will be described with reference to the drawings. figure 2 A perspective view showing the appearance of the liquid sensor of this embodiment, image 3 is shown in front view, figure 1 Shown in its longitudinal section (A-A section), Figure 4 Its cross-sectional view (B-B section) is shown in .

[0040] The structure of the liquid sensor 1 of this embodiment is that openings 13, 14 are provided on the two parallel sides 2, 3 of the cylindrical container 6 closed at both ends, and the embedded surface in the openings 13, 14 is covered with a silicon oxide coating. The plate-shaped main electrodes 4 and 5 of the film are sealed, and an appropriate amount of conductive liquid 7 is sealed inside, and the metal sub-electrode rod 8 is inserted into the conductive liquid 7 from the upper cover 11 .

[0041] The cylindrical container 6 is a cylindrical container having two parallel sides 2 , 3 . The cross section does not have to ...

no. 2 example

[0064] Since the liquid sensor in the first embodiment has a pair of main electrodes, it can only measure an inclination angle or acceleration along a line perpendicular to the surface of the main electrodes. Regarding this point, the liquid sensor of the second embodiment is a liquid sensor configured to be able to measure inclination angles or accelerations in two directions perpendicular to the horizontal plane. Figure 8 A perspective view showing the appearance of the liquid sensor 1a of this embodiment, Figure 9 shows its cross-section. Since the liquid sensor 1a has many structural parts that are the same as the liquid sensor 1 of the first embodiment, the parts that are the same as or correspond to the liquid sensor 1 are assigned the same symbols.

[0065] In the liquid sensor 1a of this embodiment, the cylindrical container 6 is formed in a square cylindrical shape. In addition, it is structured such that four plate-shaped main electrodes 4, 5, 4a, 5a having a sil...

no. 3 example

[0073] Next, a third embodiment of the liquid sensor of the present invention will be described with reference to the drawings. Figure 11 12 is a longitudinal sectional view of the liquid sensor of this embodiment, and FIG. 12 is a perspective view showing the arrangement of electrodes inside the sensor.

[0074] The liquid sensor 40 of this embodiment is a liquid sensor with a pair of main electrodes, consisting of a container 41, a conductive liquid 42, a disc 43, first and second lead terminals 44, 45, and first and second main electrodes 46, 47 poses.

[0075] The container 41 is a substantially cylindrical container with one end sealed, and is formed of a conductive material. As the conductive material, a metal with strong corrosion resistance, such as stainless steel, can be used. The opening of the cylindrical container 41 is closed with a disc 43 to form a sealed structure as a whole. The circular plate 43 is also formed of a conductive material.

[0076] In the a...

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PUM

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Abstract

A capacitance type liquid sensor is disclosed which detects a tilt angle and acceleration of an object using the fact that a liquid surface always keeps itself horizontal. Openings (13, 14) are formed in two sides of a hollow cylindrical closed container (6) made of an electrically insulating material, and the container has two parallel sides (2, 3). Plate-shaped main electrodes (4, 5) on at least one face of each of which silicon oxide film is formed are made to be in contact with the sides so as to close the openings, with the silicon oxide film being placed so as to face the inside of the container. A sealing agent (28) is interposed in a gap between the plate-shaped main electrodes and the sides. The container is filled with electrically conductive liquid (27) of an amount equal to substantially one-half of the inside volume of the container. An auxiliary electrode (8) brought into electrical contact with the conductive liquid is mounted in the container.

Description

technical field [0001] The present invention relates to a capacitive sensor using a conductive liquid suitable for use as an inclination sensor, an acceleration sensor, or a vibration sensor. Background technique [0002] An inclination sensor is a sensor installed on an object to measure the inclination angle of the object from a horizontal plane or a vertical axis. Accelerometers and shock sensors, on the other hand, are sensors that are fixed to an object to measure the acceleration experienced by the object. Since the measurement objects of the two are different, it is usual to select and use respective sensors suitable for the measurement of various physical quantities. [0003] However, a liquid sensor using a conductive liquid has been conventionally known as a sensor capable of measuring both an inclination angle and an acceleration although it is the same sensor. This kind of sensor uses the principle that the surface of the liquid is always kept horizontal in a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C9/06G01C9/20G01P15/00G01P15/02G01P15/08G01P15/125
CPCG01P15/08G01C9/06G01P15/02G01P15/125G01P15/006G01C2009/062G01C9/20
Inventor 浦野充弘户田孝史横田荣作
Owner UBUKATA IND CO LTD
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