Liquid level detecting apparatus
A technology of liquid level detection and equipment, which is applied in the direction of buoy liquid level indicators, resistance elements including multiple resistance elements, sliding contact resistors, etc., can solve the problems of increasing cost, not providing, affecting effectiveness, etc., to prevent Effects of sulfide damage, material cost reduction, and contact barrier prevention
Inactive Publication Date: 2015-12-30
YAZAKI CORP
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Problems solved by technology
[0016] The techniques according to Patent Documents 1 and 2 have an effect on the damage resistance and corrosion resistance of the conductive segment, but tend not to provide sufficient effect effectiveness since the coating becomes thinner over time
In addition, in order to obtain sufficient damage resistance and corrosion resistance, it is necessary to contain a large amount of gold (for example, approximately 40% by mass or more in the case of a conductive segment), causing a problem of increased cost
Method used
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[0032] Hereinafter, various embodiments of the present invention will be described in detail. in reference figure 1 , 2The basic structure of the liquid level detecting device of the present invention is described in detail in the prior art section of 3 and 3, but the basic structure will be described again.
[0033] Such as figure 1 As shown, the sensor 2 of the liquid level detection device 1 includes a variable resistor 3 which, by allowing the contacts 19 and 20 to be associated with changes in the liquid level inside the airtight container T as described below Move to change the resistor value. The variable resistor 3 is connected in series to the fixed resistor 7 , and in turn connected to the power supply circuit 4 that applies a predetermined voltage to the variable resistor 3 and the fixed resistor 7 .
[0034] Such as figure 2 and 3 As shown, the sensor 2 includes: a body frame 12 ; a resistance plate 13 attached to the body frame 12 ; and a sliding contact el...
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A liquid level detecting apparatus is provided. A resistance plate has a plurality of elongated conductive segments arranged therein. A float is configured to be moved upward and downward depending on a displacement of a liquid level to be measured. A floating arm has one end attached to the float and the other end rotatably supported to be rotated in response to upward and downward movements of the float. A contact is configured to be slid on the plurality of conductive segments in association with a rotation of the float arm depending on the liquid level. The plurality of conductive segments comprise a plurality of first segments made of a first metal material containing at least silver (Ag) and palladium (Pd), and a plurality of second segments made of a second metal material essentially containing gold (Au).
Description
[0001] This application is a divisional application based on the Chinese invention patent application filed on January 29, 2012 with the application number 201210021571.4 and the invention title "liquid level detection equipment". [0002] Cross References to Related Applications [0003] The disclosures of Japanese Patent Application No. 2011-012180 filed on January 24, 2011 and Japanese Patent Application No. 2011-095301 filed on April 21, 2011 including specification, drawings and claims are hereby incorporated by reference Incorporated in its entirety. technical field [0004] The present invention relates to a liquid level detection device, and more particularly, to a liquid level which automatically detects the remaining amount of liquid stored in a fuel tank for transportation means such as automobiles and airplanes by detecting the liquid level thereof Testing Equipment. Background technique [0005] A liquid level detection device is previously known for detecting...
Claims
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IPC IPC(8): G01F23/52
CPCG01F23/36H01C10/16H01C10/32
Inventor 清水贵史大池利雄田中健一
Owner YAZAKI CORP