KR20170119593A - Apparatus and method of sensing liquid inflow for electronic control unit - Google Patents

Abstract

The present invention relates to a liquid inflow sensing apparatus for an electronic control unit capable of preventing a function drop and a malfunction of an electronic apparatus caused by a liquid flowing into a brake system of a vehicle by sensing a liquid inflow into the inside thereof, 1 pad, a second pad, and a voltage sensing unit. The first pad is formed on the substrate and electrically connected to the ground. The second pad is spaced apart from the first pad on one side of the substrate, and is electrically connected to the power source. The voltage sensing unit detects a voltage difference between the first pad and the second pad. Specifically, the voltage sensing unit detects the first voltage when the first pad and the second pad are open, and when the first pad and the second pad are electrically connected by the liquid introduced into the electronic control unit, 1 < / RTI >

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquid inflow detection device and a liquid inflow detection method of an electronic control unit,

The present invention relates to a liquid inflow sensing apparatus and a liquid inflow sensing method of an electronic control unit, and more particularly, to a liquid inflow sensing apparatus and a liquid inflow sensing method of an electronic control unit that detect a liquid inflow into a braking system of a vehicle, And a liquid inflow detection device and a liquid inflow detection method of an electronic control unit capable of preventing a loss of function.

Generally, a brake system of a vehicle includes an actuator having a motor for generating a braking force, a reservoir for storing oil, a hydraulic control unit (HCU) connected to the valve, and an electronic control unit An electronic control unit (ECU), and the like.

Here, the electronic control unit may be composed of an electronic circuit, a micro control unit (MCU), a plurality of sensor interfaces, a motor drive, and a communication module.

Such an electronic control unit may cause a liquid such as oil to flow into the inside as the leakage of the valve or the seal of the electronic control unit itself is broken.

When a liquid enters the interior of the electronic control unit, the components of the electronic control unit may be corroded and corroded and damaged at the same time. In particular, components such as electronic circuits may be replaced by liquids such as oil, A new corrosion may damage the electronic control unit.

As a result, the electronic control unit may cause overcurrent due to corrosion of the electric elements, excessive temperature rise, and accident such as vehicle fire. As a result, there may arise a problem that the running safety is deteriorated.

Korean Patent Publication No. 1999-020817

The liquid inflow sensing device and the liquid inflow sensing method of the electronic control unit according to an embodiment of the present invention aim at solving the above-mentioned problems.

There is provided a liquid inflow sensing device and a liquid inflow sensing method of an electronic control unit capable of preventing an accident that may occur during traveling by sensing and warning the liquid flowing into the interior of the electronic control unit have.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide an apparatus and method for controlling the same.

A liquid inflow sensing device of an electronic control unit according to an embodiment of the present invention is a liquid inflow sensing device of an electronic control unit that senses a liquid flowing into an electronic control unit for controlling a brake system of a vehicle, A first pad electrically connected to the ground; A second pad formed on one surface of the substrate and spaced apart from the first pad and electrically connected to a power source; And a voltage sensing unit for sensing a voltage difference between the first pad and the second pad, wherein the voltage sensing unit detects a first voltage when the first pad and the second pad are open And a second voltage lower than the first voltage in a state where the first pad and the second pad are electrically connected by the liquid introduced into the electronic control unit.

And a comparing unit comparing the first voltage and the second voltage detected by the voltage detecting unit.

And an alarm unit for outputting a warning signal for warning an abnormal state of the electronic control unit based on a result of comparison between the first voltage and the second voltage compared by the comparing unit.

And a shutoff unit for shutting off the power applied to the electronic control unit when a warning signal is output from the warning unit.

And a housing in which the substrate is received, the substrate being disposed on a bottom surface of the housing.

The substrate may be disposed in a liquid containing portion formed in the bottom bottom surface of the housing at a predetermined depth to collect liquid introduced into the housing.

And a housing in which the substrate is accommodated, wherein the substrate is horizontally disposed on the bottom bottom surface of the housing.

And a housing in which the substrate is received, wherein the substrate may be disposed perpendicular to the bottom bottom surface of the housing.

The first and second pads formed on the substrate may have the same height from the bottom surface or may have different heights.

And a groove having a predetermined length which is recessed at a predetermined depth on one surface of the substrate so that a liquid in contact with the substrate remains. The first pad and the second pad may be provided at both ends of the groove, respectively.

A liquid inflow detection method of an electronic control unit according to an embodiment of the present invention is a liquid inflow detection method that is introduced into an electronic control unit for controlling a brake system of a vehicle, the electronic control unit comprising: A first pad electrically connected; A second pad formed on one surface of the substrate and spaced apart from the first pad and electrically connected to a power source; And a voltage sensing unit for sensing a voltage difference between the first pad and the second pad, wherein the first voltage is detected when the first pad and the second pad are opened, Detecting a second voltage lower than the first voltage while the second pad is electrically connected by the liquid introduced into the electronic control unit; And determining a state in which the liquid is introduced into the electronic control unit based on the first voltage and the second voltage detected from the voltage sensing unit.

Comparing the first voltage and the second voltage from a comparing unit comparing the first voltage and the second voltage detected by the voltage detecting unit after the detecting the first voltage and the second voltage, .

A warning unit for outputting a warning signal for warning an abnormal state of the electronic control unit based on a result of comparison between the first voltage and the second voltage compared by the comparing unit, Outputting the warning signal; Further comprising the steps of:

Further comprising the step of: after the step of outputting the warning signal, if the warning signal is output from the warning unit, disconnecting the power supply from the blocking unit which cuts off the power applied to the electronic control unit.

The liquid inflow sensing device and the liquid inflow sensing method of the electronic control unit according to an embodiment of the present invention detect the inflow of liquid into the electronic control unit in real time to thereby shut off the power applied to the electronic control unit And an overcurrent can be prevented from being generated.

Accordingly, the driver of the vehicle can prevent the occurrence of an accident such as a fire, thereby achieving the effect of securing the driving safety.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a schematic view of a liquid inflow sensing apparatus of an electronic control unit according to an embodiment of the present invention,
FIG. 2 is a view showing a state in which liquid is introduced into the liquid inflow detecting device of the electronic control unit of FIG. 1,
FIG. 3 is a view schematically showing a comparison unit, a warning unit, and a shutoff unit of the liquid inflow detection apparatus of the electronic control unit of FIG. 1,
4 is a flowchart sequentially illustrating a liquid inflow detection method of an electronic control unit according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or similar elements throughout the several views, and redundant description thereof will be omitted. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It is to be noted that the accompanying drawings are only for the purpose of facilitating understanding of the present invention and should not be construed as limiting the scope of the present invention.

FIG. 1 is a view schematically showing a liquid inflow sensing device of an electronic control unit according to an embodiment of the present invention. FIG. 2 is a view showing a state in which liquid is introduced into the liquid inflow sensing device of the electronic control unit of FIG. 1 And FIG. 3 is a view schematically showing a comparison unit, a warning unit, and a shutoff unit of the liquid inflow detection apparatus of the electronic control unit of FIG.

1 to 3, an electronic control unit 100 according to an embodiment of the present invention senses inflow of a liquid flowing into a brake system of a vehicle, The first pad 110, the second pad 120, the voltage sensing unit 130, the comparing unit 140, the warning unit 150, and the blocking unit 160, do.

The first pad 110 is a terminal member formed on one surface of the substrate 10 and electrically connected to the ground G.

In this embodiment, the substrate 10 may be selectively employed with a rigid or flexible printed circuit board (PCB), and the first pad 110 may be pattern printed or plated on one side of the substrate 10 have.

The ground G is a grounding part formed on the substrate 10 or formed outside the substrate 10 and electrically connected to the first pad 110 to allow current to flow from the outside to the outside.

The second pad 120 is a terminal member formed at a predetermined distance from the first pad 110 on one side of the substrate 10 and electrically connected to a power source.

The second pad 120 receives a voltage of a predetermined intensity from an external power source and is arranged on the substrate 10 so as to be spaced apart from the first pad 110 at a predetermined interval, Printed or plated.

On the other hand, the substrate 10 can be accommodated in the internal space of the housing 20 in which electronic components including various electric elements are embedded in the electronic control unit 100.

In one embodiment, the substrate 10 may be disposed horizontally on the bottom surface of the housing 10 of the electronic control unit 100, and in another embodiment, the substrate 10 may be disposed perpendicular to the bottom surface of the housing 20 .

That is, when the substrate 10 is horizontally disposed on the bottom surface of the housing 20, the liquid flowing into the housing 20 of the electronic control unit 100 gradually flows from the bottom surface of the housing 20, The liquid introduced into the control unit 100 can be quickly sensed by the voltage sensing unit 130 at the initial stage of the liquid flow while being in contact with the substrate 10 located on the lowest surface of the housing 20 .

 The first pad 110 and the second pad 120 may be spaced apart from each other by a predetermined height relative to the lowest surface of the housing 20 when the substrate 10 is disposed perpendicular to the bottom surface of the housing 20. [ The liquid introduced into the housing 20 may gradually rise from the bottom surface and may be sensed by the voltage sensing unit 130 after the beginning of the inflow of the liquid when the liquid level is above a predetermined level.

A time for detecting the inflow of liquid may be set according to the level of the liquid flowing into the housing 20. [

Here, the substrate 10 is disposed in a liquid containing portion (not shown), which is formed on the bottom surface of the bottom surface of the housing 20 so as to collect the liquid flowing into the inside of the housing 20, It is possible to more reliably perform the sensing operation by the contact between the 1,2 pad 110 and the liquid flowing into the inside of the housing 20.

The first pad 110 and the second pad 120 are provided at one end and the other end of a groove (not shown), which is recessed at a predetermined length on one surface of the substrate 10 so as to remain in contact with the substrate 10, The liquid flowing into the interior of the housing 20 is filled in the recess so that the sensing of the voltage sensing part 130 by the electrical connection between the first pad 110 and the second pad 120 can be performed more accurately and stably Can be performed.

Here, the first pad 110 and the second pad 120 are formed on one surface of the substrate 10 at the same time, but the present invention is not limited thereto. The first pad 110 and the second pad 120 may be formed on one surface and the other surface, respectively.

The voltage sensing unit 130 detects a voltage difference between the first pad 110 and the second pad 120.

Specifically, the voltage sensing unit 130 detects a first voltage when the first pad 110 and the second pad 120 are opened, and when the first pad 110 and the second pad 120 are electrically connected to each other, And detects a second voltage that is relatively lower than the first voltage in a state of being short-circuited by the liquid that has flowed into the control unit (100).

1, when no liquid flows into the housing 20 of the electronic control unit 100, the electronic control unit 100 is in a normal state, and the first pad 110 and the second pad 120 are in a normal state, The first pad 110 and the second pad 120 are electrically disconnected from each other and no current is generated therebetween.

2, when the liquid such as oil or water flows into the interior of the housing 20 due to internal or external factors, the electronic control unit 100 is in an abnormal state, and the first pad 110 The second pads 120 are electrically connected to each other by the liquid introduced therein, and a constant resistance R is generated therebetween to generate a current.

That is, when the liquid is introduced into the housing 20 of the electronic control unit 100 and thus the first pad 110 and the second pad 120 are immersed in liquid contacted with the substrate or immersed in the liquid, The first pad 110 and the second pad 120 are electrically connected to each other by a liquid and a constant resistance R is generated and a short circuit is generated between the first pad 110 and the second pad 120 And an overcurrent may be generated between the first pad 110 and the second pad 120.

At this time, the electric current flowing between the first and second pads 110 and 120 flows to the outside through the ground (G).

The comparator 140 compares the first voltage detected by the voltage detector 130 with the second voltage.

As a result of comparing the first voltage and the second voltage in the comparison unit 140, it can be seen that a voltage value greater than the second voltage is detected as the first voltage. As a result of the comparison, It is possible to promptly and quickly detect the state in which the liquid flows into the interior of the electronic control unit 100 and to determine the abnormal state of the electronic control unit 100. [

The warning unit 150 outputs a warning signal for warning the abnormal state of the electronic control unit 100 based on the comparison result by comparing the first voltage and the second voltage compared by the comparison unit 140 .

For example, when the warning unit 150 outputs a warning signal with a warning light, the driver of the vehicle can sense an abnormality in the electronic control unit 100 through the warning light.

When the warning unit 150 outputs a warning signal, the cut-off unit 160 cuts off the power applied to the electronic control unit 100 based on the warning signal.

Here, the cutoff unit 160 may cut off the power applied to the electronic control unit 100 after the lapse of a predetermined time, rather than shutting off the power applied to the electronic control unit 100 at the same time that the warning signal is output.

In this way, the comparing unit 140, the warning unit 150, and the shutoff unit 160 are provided with the control unit A for judging the inflow of the liquid inside the electronic control unit 100, warning the driver, .

In the present embodiment, the voltage difference between the pad 110 and the second pad 120 is detected to detect the state of the liquid flowing into the housing 20, but the present invention is not limited thereto, In another embodiment, the sensor may be used to sense the inflow of liquid.

4 is a flowchart sequentially illustrating a liquid inflow detection method of an electronic control unit according to an embodiment of the present invention.

In Fig. 4 of the method of detecting a liquid inflow of an electronic control unit according to an embodiment of the present invention, members referred to by the same reference numerals as those shown in Figs. 1 to 3 have the same configuration and function , And a detailed description thereof will be omitted.

A method for detecting a liquid inflow of an electronic control unit according to an embodiment of the present invention includes detecting a first voltage and a second voltage (S100), comparing a first voltage and a second voltage (S200) A step S300 of outputting a warning signal, and a step S500 of cutting off the power supply.

The first voltage and the second voltage are detected in step S100 by detecting the first voltage in a state where the first pad 110 and the second pad 120 are opened, (120) detects a second voltage lower than the first voltage in a state of being short-circuited by the liquid flowing into the interior of the electronic control unit (100).

The first pad 110 and the second pad 120 are connected to each other through the voltage sensing unit 130. The first pad 110 and the second pad 120 are connected to each other through the voltage sensing unit 130, And detects a second voltage lower than the first voltage in a state of being short-circuited by the liquid flowing into the inside of the electronic control unit (100).

The first pad 110 and the second pad 120 are opened in a state where the liquid does not flow into the housing 20 of the electronic control unit 100, No current is generated between the pads 120.

Conversely, in the abnormal state in which the liquid flows into the housing 20, a current is generated while a certain resistance R is generated between the first pad 110 and the second pad 120.

That is, the liquid is introduced into the electronic control unit 100, so that a certain resistance R is generated between the first pad 110 and the second pad 120 by the liquid, The first voltage and the second voltage are detected.

Step S200 of comparing the first voltage and the second voltage may include comparing the first voltage and the second voltage detected by the voltage sensing unit 130 after detecting the first voltage and the second voltage S100 The comparator 140 compares the first voltage and the second voltage.

The comparison unit 140 compares the first voltage with the second voltage, and when the first voltage and the second voltage are compared through the comparison unit 140, the first voltage is higher than the second voltage Able to know.

The step S300 of determining whether the liquid is introduced determines whether the liquid has flowed into the electronic control unit 100 based on the first voltage and the second voltage detected from the voltage sensing unit 130. [

That is, the comparison unit 140 compares the first voltage and the second voltage detected by the voltage sensing unit 130, and then, based on the comparison result of the first voltage and the second voltage, And judges an abnormal state of the electronic control unit 100. [0050]

The step of outputting the warning signal (S400) may include the step of determining the state of the liquid flowing in, and the step of outputting the warning signal may include the step of comparing the abnormality of the electronic control unit 100 And outputs a warning signal to the warning unit 150 that outputs a warning signal for warning the status.

Specifically, based on the comparison result of the first voltage and the second voltage compared by the comparison unit 140, the warning unit 150 outputs a warning signal for warning the abnormal state of the electronic control unit 100. [

Accordingly, when the warning unit 150 outputs a warning signal with a warning lamp, the driver of the vehicle can sense an abnormality in the electronic control unit 100 through the warning lamp.

In step S500, when a warning signal is output from the warning unit 150, the power is cut off from the cut-off unit 160 which cuts off the power applied to the electronic control unit 100 do.

The blocking unit 160 cuts off the power applied to the electronic control unit 100 when a warning signal is output from the warning unit 150.

At this time, the cut-off unit 160 does not cut off the power applied to the electronic control unit 100 at the same time that the warning signal is output, but cut off the power applied to the electronic control unit 100 after a predetermined time elapses.

As a result, when the liquid flows into the electronic control unit 100, the first voltage and the second voltage between the first pad 110 and the second pad 120 are detected, and the first voltage and the second voltage And senses the state in which the liquid is introduced. Upon detecting the inflow of the liquid, a warning signal is output to notify the driver of the vehicle of an abnormal state, and the power applied to the electronic control unit 100 can be cut off.

In this manner, by detecting that the liquid flows into the electronic control unit 100, the power applied to the electronic control unit 100 can be cut off, and the effect of preventing the occurrence of the overcurrent can be obtained.

Accordingly, the driver of the vehicle can prevent the occurrence of an accident such as a fire, thereby improving the driving safety.

The embodiments and the accompanying drawings described in the present specification are merely illustrative of some of the technical ideas included in the present invention. Therefore, it is to be understood that the embodiments disclosed herein are not for purposes of limiting the technical idea of the present invention, but are intended to be illustrative, and thus the scope of the technical idea of the present invention is not limited by these embodiments. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims. I can do it.

10: substrate
20: Housing
110: first pad
120: second pad
130:
140:
150: Warning section
160:

Claims (14)

1. A liquid inflow sensing device of an electronic control unit for sensing a liquid flowing into an electronic control unit for controlling a braking system of a vehicle,
A first pad formed on the substrate and electrically connected to the ground;
A second pad formed on one surface of the substrate and spaced apart from the first pad and electrically connected to a power source; And
And a voltage sensing unit for sensing a voltage difference between the first pad and the second pad,
The voltage sensing unit includes:
Wherein the first voltage is detected when the first pad and the second pad are open,
Wherein the first and second pads detect a second voltage lower than the first voltage while being electrically connected by the liquid introduced into the electronic control unit.
The method according to claim 1,
And a comparing unit comparing the first voltage and the second voltage detected by the voltage detecting unit.
3. The method of claim 2,
And an alarm unit for outputting a warning signal for warning an abnormal state of the electronic control unit based on a comparison result of the first voltage and the second voltage compared by the comparison unit, .
The method of claim 3,
And a shutoff unit for shutting off power supplied to the electronic control unit when a warning signal is output from the warning unit.
5. The method according to any one of claims 1 to 4,
A housing in which the substrate is received,
Wherein the substrate is disposed on a bottom surface of the housing.
5. The method according to any one of claims 1 to 4,
A housing in which the substrate is received,
Wherein the substrate is disposed in a liquid containing portion in which the liquid flowing into the inside of the housing is collected by being recessed to a bottom depth of the bottom surface of the housing by a predetermined depth.
5. The method according to any one of claims 1 to 4,
A housing in which the substrate is received,
Wherein the substrate is horizontally disposed on the bottom bottom surface of the housing.
5. The method according to any one of claims 1 to 4,
A housing in which the substrate is received,
Wherein the substrate is disposed perpendicular to the bottom bottom surface of the housing.
9. The method of claim 8,
Wherein the first pad and the second pad formed on the substrate are formed at the same height from the bottom surface or at different heights.
5. The method according to any one of claims 1 to 4,
Wherein the first pad and the second pad have a predetermined length of recess formed in a surface of the substrate so that a liquid in contact with the substrate remains, Device.
A method for detecting a liquid inflow into an electronic control unit for controlling a brake system of a vehicle,
Wherein the electronic control unit comprises:
A first pad formed on the substrate and electrically connected to the ground;
A second pad formed on one surface of the substrate and spaced apart from the first pad and electrically connected to a power source; And
And a voltage sensing unit for sensing a voltage difference between the first pad and the second pad,
The first pad and the second pad are electrically connected while the first pad and the second pad are electrically connected to each other by the liquid introduced into the electronic control unit, Detecting a second voltage lower than the first voltage; And
And determining a state in which the liquid is introduced into the electronic control unit based on the first voltage and the second voltage detected from the voltage sensing unit.
12. The method of claim 11,
After detecting the first voltage and the second voltage,
And comparing the first voltage and the second voltage from a comparison unit comparing the first voltage and the second voltage detected by the voltage sensing unit.
13. The method of claim 12,
After the step of determining the state in which the liquid is introduced,
Outputting the warning signal in a warning section for outputting a warning signal for warning an abnormal state of the electronic control unit based on a comparison result of the first voltage and the second voltage compared from the comparison section; Further comprising the steps of:
14. The method of claim 13,
After the step of outputting the warning signal,
And disconnecting the power source from the cutoff unit which cuts off the power applied to the electronic control unit when a warning signal is output from the warning unit.

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