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Leak sensor

A technology of capacitors and shells, which is applied in the field of facilities and can solve problems such as leakage

Inactive Publication Date: 2019-01-04
ZF FRIEDRICHSHAFEN AG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the lead-through of the shaft through the transmission housing presents a risk of such leakage

Method used

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Examples

Experimental program
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Embodiment Construction

[0019] figure 1 The circuit setup shown in includes a Wheatstone bridge 101 and an operational amplifier 103 . The Wheatstone bridge 101 also has a first capacitor 105 , a second capacitor 107 , a first ohmic resistor 109 and a second ohmic resistor 111 .

[0020] A first pole of the first capacitor 105 and a first connection of the first ohmic resistor 109 are connected to one another via a first electrical connection 113 . Likewise, the second joint of the first ohmic resistor 109 is connected to the first joint of the second ohmic resistor 111 via the second conductive connection part 115, and the second joint of the second ohmic resistor 111 is connected to the first pole of the second capacitor 107 via The third conductive connection 117 is connected and the second connection of the second capacitor 107 and the second connection of the first capacitor 115 are connected via the fourth conductive connection 119 .

[0021] An alternating voltage is applied to the Wheatston...

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Abstract

The invention relates to an arrangement having at least one shaft, at least one housing and at least one capacitor (105); wherein the shaft runs through an opening of the housing; wherein a first electrode and a second electrode of the capacitor (105) form a gap. The capacitor (105) is arranged in such a manner that lubricant emerging through the opening out of the housing passes at least partially into the gap.

Description

technical field [0001] The invention relates to an installation according to the preamble of claim 1 . Background technique [0002] Capacitive oil level sensors are known from the prior art. Capacitive oil level sensors use capacitors to identify the presence of oil. When oil enters the gap between the capacitor's electrodes, the dielectric constant of the capacitor changes. Such a sensor can be used to determine whether the fluid level in the oil sump exceeds or falls below a certain threshold value. [0003] Capacitive oil sensors known from the prior art are not suitable for detecting oil leaks. In particular, the lead-through of the shaft through the transmission housing presents the risk of such leakage. In order to prevent escaping oil from causing environmental damage or transmission malfunctions due to low oil levels, such leaks must be identified early and reliably. Contents of the invention [0004] This object is solved by a device according to claim 1 . ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/26G01M3/40
CPCG01M3/40G01F23/263G01F23/268G01F23/266
Inventor 约翰内斯·舍费尔乔治·滕克霍夫克里斯·斯莫尔德斯卢克·吉恩斯勒克·贝克
Owner ZF FRIEDRICHSHAFEN AG