KR-20260067285-A - apparatus and method for detecting moisture

KR20260067285AKR 20260067285 AKR20260067285 AKR 20260067285AKR-20260067285-A

Abstract

A moisture detection device comprises: a moisture detection module that outputs a signal based on the moisture content of a pressurized medium stored in a reservoir; and a control unit that identifies the moisture content of the pressurized medium based on the output signal of the moisture detection module. The moisture detection module comprises: a substrate; a plurality of electrode patterns provided on the substrate and immersed in the pressurized medium; a connector provided on one side of the reservoir and connected to the control unit; and a signal line connecting the plurality of electrode patterns and the connector. The control unit can generate a monitoring signal based on the output of at least one of the plurality of electrode patterns, compare the monitoring signal with preset reference data, and identify the moisture content of the pressurized medium based on the comparison result.

Inventors

이한준

Assignees

에이치엘만도 주식회사

Dates

Publication Date: 20260512
Application Date: 20250320
Priority Date: 20241105

Claims (20)

A moisture detection module that outputs a signal based on the moisture content of a pressurized medium stored in a reservoir; and It includes a control unit that identifies the moisture content of the pressurized medium based on the output signal of the moisture detection module, and The above moisture detection module is, Substrate; A plurality of electrode patterns provided on the substrate and immersed in the pressurizing medium; A connector provided on one side of the above reservoir and connected to the control unit; and It includes a signal line connecting the plurality of electrode patterns and the connector, The above control unit is, A moisture detection device that generates a monitoring signal based on at least one output signal among the plurality of electrode patterns, compares the monitoring signal with preset reference data, and identifies the moisture content of the pressurized medium based on the comparison result.
In paragraph 1, The above reference data is, A moisture sensing device comprising at least one of a reference voltage level, a reference current level, and a reference matching resistance value between a plurality of electrode patterns corresponding to the moisture content of the pressurized medium.
In paragraph 1, The above control unit is, A moisture detection device comprising a memory that stores a lookup table in which the above reference data is recorded.
In paragraph 1, The above plurality of electrode patterns are, A first electrode pattern provided on at least one surface of the substrate and to which a reference voltage is applied; and A moisture sensing device comprising a second electrode pattern spaced apart from the first electrode pattern and provided on at least one surface of the substrate, and outputting a signal based on the moisture content of the pressurizing medium.
In paragraph 4, The above plurality of electrode patterns are, A moisture sensing device further comprising a third electrode pattern provided on the other side of the substrate to which the reference voltage is applied, and a fourth electrode pattern provided on the other side of the substrate to which a signal based on the moisture content of the pressurized medium is output.
In paragraph 4, The above control unit is, A moisture sensing device that generates a monitoring signal based on a signal output from the second electrode pattern by a resistance formed between the first electrode pattern and the second electrode pattern.
In paragraph 1, The above plurality of electrode patterns are, A first electrode pattern provided on one surface of the substrate and to which a reference voltage is applied; and A moisture sensing device comprising a second electrode pattern provided on the other side of the substrate and outputting a signal based on the moisture content of the pressurized medium.
In paragraph 1, The above connector is, A moisture sensing device integrally provided in a reservoir cap coupled to the top of the above reservoir.
In paragraph 8, Each of the above plurality of electrode patterns is, It extends linearly along the uniaxial direction of the above substrate, and The above substrate is, A moisture detection device vertically positioned based on the connection of the above connector and the above signal line.
In Paragraph 9, The above moisture detection module is, A moisture detection device that outputs a signal based on a change in the water level of the above-mentioned pressurized medium.
In paragraph 1, The above control unit is, A moisture detection device that outputs a warning signal when the moisture content of the above-mentioned pressurized medium exceeds a preset threshold.
In a method for a moisture detection device to detect the moisture content of a pressurized medium, A step of applying a reference voltage to at least one of a plurality of electrode patterns; A step of generating a monitoring signal based on electrical characteristics between an electrode pattern to which the reference voltage is applied and an electrode pattern corresponding to the electrode pattern to which the reference voltage is applied; A step of comparing the above monitoring signal with preset reference data; and A moisture detection method comprising the step of identifying the moisture content of the pressurized medium based on a comparison result.
In Paragraph 12, The above reference data is, A moisture detection method comprising at least one of a reference voltage level, a reference current level, and a reference matching resistance value between the electrode patterns corresponding to the moisture content of the pressurized medium.
In Paragraph 12, In the step of applying the above reference voltage, A moisture detection method for applying a reference voltage to a first electrode pattern disposed on at least one surface of a substrate among the plurality of electrode patterns.
In Paragraph 14, In the step of generating the above monitoring signal, A moisture detection method that generates a monitoring signal based on a signal output from a second electrode pattern spaced apart from the first electrode pattern.
In paragraph 15, The first electrode pattern and the second electrode pattern are, A moisture detection method provided on one side of a substrate or on different sides of the substrate, respectively.
In Paragraph 12, The above plurality of electrode patterns are, It extends linearly along the uniaxial direction of the substrate, and A moisture detection method in which the above substrate is vertically positioned based on a connection with a connector integrally provided in a reservoir cap coupled to the top of the reservoir.
In Paragraph 17, The step of monitoring the above electrical characteristics is, A moisture detection method comprising the step of additionally monitoring a signal based on a change in the water level of the pressurized medium.
In Paragraph 12, A moisture detection method further comprising the step of outputting a warning signal when the moisture content of the pressurized medium exceeds a preset threshold.
In Paragraph 12, A step of storing the trend of change in the identified moisture content; and A moisture detection method further comprising the step of predicting the replacement time of the pressurized medium based on the stored change trend.

Description

Apparatus and method for detecting moisture The disclosed invention relates to a moisture detection device and method. The braking system is one of the most critical components of a vehicle and is directly related to the driver's life, so a robust design against failure is absolutely necessary. Recently, electronic braking systems utilizing redundancy circuit designs to perform backup functions have been developed, but they still have the disadvantage of existing risks regarding failure symptoms such as vapor lock, as the power source remains hydraulic. Vapor lock is one of the representative brake defects, characterized by a sudden drop in braking power due to the inability to generate normal pressure during braking caused by the formation of air bubbles within the brake fluid. The fundamental cause of this phenomenon is that the ingress of moisture into the oil lowers its boiling point, causing it to vaporize easily under high-temperature conditions. Generally, it is recommended to replace the entire oil when the moisture content exceeds 3%. However, since there is currently no system in place to self-diagnose oil quality in vehicles, drivers must continuously perform preventive maintenance to prevent brake failure caused by vapor lock. FIG. 1 is a drawing showing the configuration of an electronic brake system and a vehicle related thereto according to one embodiment of the disclosed invention. FIG. 2 is a diagram showing the circuit configuration of an electronic brake system according to one embodiment of the disclosed invention. FIG. 3 is a diagram showing the schematic configuration of a moisture detection device according to one embodiment of the disclosed invention. FIG. 4 is a drawing showing the installation structure of a moisture detection device according to one embodiment of the disclosed invention. FIG. 5 is a drawing showing in detail the configuration of a moisture detection module according to one embodiment of the disclosed invention. FIG. 6 is a diagram showing the circuit configuration of a moisture detection device according to one embodiment of the disclosed invention. Figures 7 and 8 are drawings showing the output signals of a moisture detection module according to the type of pressurized medium. FIG. 9 is a drawing showing the electrode pattern of a moisture sensing module according to another embodiment of the disclosed invention. FIG. 10 is a drawing showing the electrode pattern of a moisture sensing module according to another embodiment of the disclosed invention. FIG. 11 is a drawing illustrating a moisture detection method according to one embodiment of the disclosed invention. Throughout the specification, the same reference numerals refer to the same components. This specification does not describe all elements of the embodiments, and general content in the art to which the disclosed invention pertains or content that overlaps between embodiments is omitted. The terms 'part, module, component, block' used in the specification may be implemented in software or hardware, and depending on the embodiments, a plurality of 'parts, modules, components, blocks' may be implemented as a single component, or a single 'part, module, component, block' may include a plurality of components. Throughout the specification, when a part is described as being "connected" to another part, this includes not only cases where they are directly connected but also cases where they are indirectly connected, and indirect connections include connections made via a wireless communication network. Furthermore, when it is stated that a part "includes" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Throughout the specification, when it is stated that a component is located "on" another component, this includes not only cases where a component is in contact with another component, but also cases where another component exists between the two components. The terms first, second, etc. are used to distinguish one component from another, and the components are not limited by the aforementioned terms. Singular expressions include plural expressions unless there is an obvious exception in the context. In each step, identification codes are used for convenience of explanation and do not describe the order of the steps; the steps may be performed differently from the specified order unless a specific order is clearly indicated in the context. The operating principle and embodiments of the disclosed invention will be described below with reference to the attached drawings. FIG. 1 is a drawing showing the configuration of a brake system according to one embodiment of the disclosed invention. Referring to FIG. 1, the vehicle (1) may include a plurality of rotating wheels (w1, w2, w3, w4). Each of the plurality of wheels (w1, w2, w3, w4) may include, for example, a first wheel (w1) provided on the front left (FL)