KR20170130870A - Combination type sensor package, combination detection device and combination detecting method - Google Patents

Abstract

A combination-type sensor package according to an embodiment of the present invention includes: a substrate; a first sensor disposed on an upper surface of the substrate and including a carbon micro-coil; a driving portion disposed on a lower surface of the substrate and acquiring rainfall information based on an impedance value of the first sensor; a control portion disposed on a lower surface of the substrate, acquiring relative temperature information according to the impedance value of the first sensor based on a temperature reaction characteristic of the first sensor, and acquiring moisture generation information based on the relative temperature information; and a protective layer formed by surrounding the substrate, the first sensor, the driving portion, and the control portion. The first sensor includes: a sensing electrode disposed on the substrate; and a reactive layer disposed by embedding the sensing electrode on the substrate, and composed of a carbon micro-coil.

Description

TECHNICAL FIELD [0001] The present invention relates to a hybrid type sensor package, a hybrid sensing device, and a method of operating the same.

The present invention relates to a hybrid type sensor package, and more particularly, to a hybrid type sensor package, a hybrid sensing device, and a method of operating the hybrid type sensor package, which can detect the occurrence of sexual intercourse in combination with a rain sensor to drive a wiper and a fan.

Generally, a wiper is installed on the front windshield of a vehicle in order to overcome a watch failure caused by rainwater in a rainfall, and the wiper is controlled in an intermittent speed control step by step according to the degree of drop of rainwater. However, since the speed control system of the wiper is controlled by only a few steps, there is a disadvantage that the driver can not move the wiper at a desired speed according to the amount of rainwater.

In order to overcome this problem, the circuit board on which the light source and the sensor which is the light receiving element are mounted is inclined with respect to the windshield surface to minimize the influence of the light reflected from the windshield surface. On the other hand, So that the rain sensing efficiency can be increased. That is, the light directly reflected from the windshield falls outside the light receiving element's light receiving range and is reflected by the windshield to minimize the amount of light received by the light receiving element. On the other hand, since only the light amount reflected by the raindrop is received by the light receiving element, A circuit board provided with a light source and a light receiving element is arranged to be inclined at a predetermined angle with respect to the windshield surface so that only a diffuse reflection signal can be detected.

However, even in the case of a product in which the light source and the light receiving element are arranged with the circuit board inclined with respect to the windshield surface of the vehicle as described above, light emitted from the light source may be directly absorbed by the light receiving element. Somewhat incomplete and insufficient. That is, the light emitted from the light source spreads over a range of angles. Even if the light source and the light receiving element are arranged at an angle to the windshield surface, a part of the light is directly reflected toward the light receiving element, There is no problem of reducing the raindrop detection efficiency to some extent due to the interference light absorbed by the light receiving element, and thus there is a somewhat insufficient aspect in terms of completeness in the rain sensing efficiency.

In the case of designing to minimize the ambient interference light due to the headlight light of the above-mentioned surrounding traveling vehicle, interference light which can not inevitably be blocked is generated, and the light sensing rain sensor itself is a very sensitive sensor product. It is difficult to obtain a highly precise rainsensing effect. Further, in order to realize the structure for minimizing the influence of the ambient light, it is necessary to have a somewhat complicated structure It is inevitable to have a limitation such as a somewhat inefficient productivity and a somewhat higher product cost.

On the other hand, when raining, moisture is generated in the windshield of the vehicle, and the fan must be driven accordingly.

However, in the prior art, since the moisture sensor and the rain sensor are separately constructed, different sensors are installed in the vehicle, respectively, and there is a limitation in installation in the space, and there is a problem that the rain sensor itself can not detect whether moisture is generated have.

According to an embodiment of the present invention, there is provided a hybrid type sensor package, a composite sensing device, and an operation method thereof capable of determining whether moisture is generated using a rain sensor.

In addition, in the embodiment of the present invention, the hybrid sensor package, the composite sensing device, and the operation thereof, which are constituted by one package of the humidity sensor and the rain sensor and can be combined with the wiper and fan drive by one sensor package ≪ / RTI >

It is to be understood that the technical objectives to be achieved by the embodiments are not limited to the technical matters mentioned above and that other technical subjects not mentioned are apparent to those skilled in the art to which the embodiments proposed from the following description belong, It can be understood.

A hybrid type sensor package according to an embodiment includes: a substrate; A first sensor disposed on an upper surface of the substrate and including a carbon micro-coil; A driving unit disposed on a lower surface of the substrate to obtain rainfall information based on an impedance value of the first sensor; A controller disposed on the lower surface of the substrate for obtaining relative temperature information according to an impedance value of the first sensor based on the temperature response characteristic of the first sensor and acquiring moisture generation information based on the relative temperature information; And a protective layer surrounding the substrate, the first sensor, the driving unit, and the control unit, wherein the first sensor includes: a sensing electrode disposed on the substrate; And a reaction layer composed of carbon micro-coils.

The apparatus further includes a second sensor disposed on the upper surface of the substrate and accommodated in the protective layer, the second sensor measuring the first temperature.

In addition, the protective layer has an opening formed in a region vertically overlapping with the surface of the second sensor.

The apparatus further includes a third sensor disposed on a lower surface of the substrate and accommodated in the protective layer, the third sensor measuring a second temperature.

In addition, the protective layer has an opening formed in an area overlapping vertically downward with the surface of the third sensor.

A second sensor disposed on the upper surface of the substrate and housed in the protective layer, the second sensor measuring a first temperature; And a third sensor disposed on the lower surface of the substrate and accommodated in the protective layer, the third sensor measuring a second temperature, wherein the protective layer is formed on the surface of the substrate, 1 opening and a second opening formed in an area overlapping vertically downward with the surface of the third sensor.

The sensor further includes a fourth sensor disposed on a lower surface of the substrate and accommodated in the protection layer, the humidity sensor comprising: a fourth sensor for measuring humidity, and a surface of the fourth sensor is exposed to the outside through the second opening.

Also, the controller acquires rainfall information based on the impedance value of the first sensor, and acquires moisture generation information based on the sensed values through the first to fourth sensors.

According to another aspect of the present invention, there is provided a hybrid sensing apparatus comprising: a first sensor attached to an inner surface of a windshield of a vehicle, the sensor including a carbon micro-coil whose impedance value changes according to an external contact material; A rainfall sensing unit for determining rainfall amount and rainfall amount based on an impedance value of the first sensor; And a controller for acquiring a relative temperature according to the impedance change of the first sensor based on the temperature response characteristic of the first sensor and determining whether moisture is generated based on the obtained relative temperature.

The apparatus further includes a memory for storing temperature response characteristic information of the first sensor indicating a relationship between a relative temperature according to a difference between an external temperature of the vehicle and an internal temperature of the vehicle, and an impedance value of the first sensor.

Also, the controller obtains the relative temperature based on the temperature response characteristic information stored in the memory, and outputs a signal for driving the fan when the variation amount of the relative temperature exceeds a predetermined first critical point.

The controller may further include a second sensor for sensing an external temperature of the vehicle, wherein the control unit sets a difference between a relative temperature acquired through the first sensor and an external temperature acquired through the second sensor And if it exceeds the second critical point, outputs a signal for driving the fan.

The control unit may further include a third sensor for sensing an internal temperature of the vehicle, wherein the control unit sets a difference between a relative temperature acquired through the first sensor and an internal temperature acquired through the third sensor, And if it exceeds the third critical point, outputs a signal for driving the fan.

A second sensor for sensing an external temperature of the vehicle; And a third sensor for sensing an internal temperature of the vehicle, wherein the control unit controls the temperature of the first sensor, the temperature of the second sensor, And determines whether or not the moisture is generated based on the internal temperature obtained through the operation.

In addition, the controller compensates the external temperature acquired through the second sensor based on the relative temperature acquired through the first sensor.

In addition, the controller outputs a signal for driving the fan when the difference between the compensated external temperature and the internal temperature acquired through the third sensor exceeds a preset fourth critical point.

The controller may further include a fourth sensor for sensing an internal humidity of the vehicle, wherein the controller obtains a relative humidity amount based on a difference between the compensated external temperature and the obtained internal temperature, And outputs a signal for driving the fan when the difference value of the internal humidity amount exceeds the preset fifth threshold.

According to another aspect of the present invention, there is provided a method of operating a hybrid sensing device, comprising: obtaining an impedance value of a first sensor attached to an inner surface of a windshield of a vehicle; Obtaining rainfall information based on the obtained impedance value; Outputting a wiper drive signal based on the obtained rainfall information; Obtaining a relative temperature according to the impedance value based on the temperature response characteristic of the first sensor; Obtaining moisture generation information based on the obtained relative temperature; And outputting a fan drive signal based on the acquired moisture generation information.

The method may further include storing temperature response characteristic information of the first sensor indicating a relationship between a relative temperature according to a difference between an external temperature of the vehicle and an internal temperature of the vehicle, and an impedance value of the first sensor.

The obtaining of the moisture generation information may include obtaining the relative temperature according to the impedance value of the first sensor on the basis of the stored temperature response characteristic information and comparing the variation amount of the relative temperature with a preset first critical point And determining whether the value exceeds a predetermined threshold value.

The step of acquiring moisture generation information may further include acquiring the relative temperature according to an impedance value of the first sensor based on the stored temperature response characteristic information, And determining whether the difference between the obtained relative temperature and the sensed external temperature exceeds a predetermined second critical point.

The step of acquiring moisture generation information may further include acquiring the relative temperature according to an impedance value of the first sensor based on the stored temperature response characteristic information, And determining whether a difference between the relative temperature obtained through the first sensor and the sensed internal temperature exceeds a preset third critical point.

The method of claim 1, further comprising: sensing an external temperature of the vehicle and an internal temperature of the vehicle, wherein the step of acquiring moisture generation information comprises: The method comprising the steps of: acquiring a relative temperature; compensating the sensed external temperature based on the relative temperature acquired through the first sensor; comparing the compensated external temperature with a sensed value of the sensed internal temperature, 4 > critical point. ≪ / RTI >

The method of claim 1, further comprising the step of sensing an internal humidity of the vehicle, wherein the step of acquiring moisture generation information includes: acquiring a relative humidity amount based on a difference between the compensated external temperature and the obtained internal temperature; And determining whether a difference between the relative humidity amount and the sensed humidity amount exceeds a predetermined fifth threshold value.

According to the embodiment of the present invention, it is possible to judge whether moisture is generated by using the rain sensor, so that the product unit price according to the individual sensor can be remarkably reduced.

In addition, according to the embodiment of the present invention, by detecting the presence or absence of rain and the occurrence of moisture using the composite sensor, it is possible to drive the fan according to moisture generation automatically, not by a user, have.

In addition, in the embodiment of the present invention, the moisture sensor and the rain sensor are constituted by one package, so that the space occupied by the individual sensors can be saved, and the satisfaction of the design can be improved accordingly.

1 is a side view showing a state in which a composite sensor is mounted on a front glass of a vehicle according to an embodiment of the present invention.
2 is a cross-sectional view showing a detailed structure of a composite sensor according to a first embodiment of the present invention.
FIG. 3 is a view showing the reaction layer shown in FIG. 2. FIG.
4 is a plan view of the sensing electrode shown in FIG.
5 is a view for explaining a method of manufacturing the composite sensor 20 shown in FIG.
6 shows characteristics of a carbon micro-coil according to an embodiment of the present invention.
FIG. 7 is a diagram for explaining a drive reference of the composite sensor shown in FIG. 2. FIG.
8 is a cross-sectional view showing a detailed structure of a composite sensor according to a second embodiment of the present invention.
Fig. 9 is a diagram for explaining the drive reference of the composite sensor shown in Fig. 8. Fig.
10 is a cross-sectional view showing a detailed structure of a composite sensor according to a third embodiment of the present invention.
11 is a diagram for explaining a drive reference of the composite sensor shown in FIG.
12 is a cross-sectional view showing a detailed structure of a composite sensor according to a fourth embodiment of the present invention.
13 is a diagram for explaining a drive reference of the composite sensor shown in Fig.
FIG. 14 is a cross-sectional view showing a detailed structure of a composite sensor according to a fifth embodiment of the present invention.
Fig. 15 is a diagram for explaining the drive reference of the composite sensor shown in Fig. 14. Fig.
16 is a block diagram illustrating a configuration of a compound sensing apparatus according to an embodiment of the present invention.
17 is a view for explaining a fan driving criterion according to an embodiment of the present invention.
18 to 22 are flowcharts for explaining the operation of the composite sensor according to the embodiment of the present invention step by step.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

Combinations of the steps of each block and flowchart in the accompanying drawings may be performed by computer program instructions. These computer program instructions may be embedded in a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus so that the instructions, which may be executed by a processor of a computer or other programmable data processing apparatus, Thereby creating means for performing the functions described in the step. These computer program instructions may also be stored in a computer usable or computer readable memory capable of directing a computer or other programmable data processing apparatus to implement the functionality in a particular manner so that the computer usable or computer readable memory It is also possible to produce manufacturing items that contain instruction means that perform the functions described in each block or flowchart illustration in each step of the drawings. Computer program instructions may also be stored on a computer or other programmable data processing equipment so that a series of operating steps may be performed on a computer or other programmable data processing equipment to create a computer- It is also possible for the instructions to perform the processing equipment to provide steps for executing the functions described in each block and flowchart of the drawings.

Also, each block or each step may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative embodiments, the functions mentioned in the blocks or steps may occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially concurrently, or the blocks or steps may sometimes be performed in reverse order according to the corresponding function.

FIG. 1 is a side view showing a state where a composite sensor is mounted on a front glass of a vehicle according to an embodiment of the present invention, FIG. 2 is a sectional view showing the detailed structure of the composite sensor according to the first embodiment of the present invention, FIG. 4 is a plan view of the sensing electrode shown in FIG. 2; FIG.

Referring to FIG. 1, a composite sensor 20 is attached to a windshield 10 of a vehicle.

The composite sensor 20 is installed to face the inner surface of the windshield 10 of the vehicle and detects a change in impedance depending on the presence or absence of raindrop falling on the windshield 10 or the amount of raindrops.

In addition, the composite sensor 20 varies in impedance depending on the moisture generated on the inner surface of the windshield 10 of the vehicle. At this time, the moisture generated on the inner surface is generated by the difference between the temperature of the windshield 10 (i.e., the temperature of the outside of the vehicle) and the vehicle interior temperature. Accordingly, it is possible to confirm the relative temperature with respect to the difference between the outside temperature and the outside temperature of the vehicle according to the impedance change. That is, the composite sensor 20 has a temperature response characteristic in which the impedance changes according to the difference between the internal temperature and the internal temperature of the vehicle, and can detect the corresponding relative temperature according to the change of the impedance.

The relative temperature refers to the temperature difference between the inside of the vehicle and the temperature of the windshield 10 (that is, it may correspond to the outside temperature of the vehicle).

As a result, the composite sensor 20 forms a sensing region at a predetermined position of the windshield 10 of the vehicle, detects information according to the state of the raindrops generated in the sensing region and information on moisture generation do.

At this time, the composite sensor 20 is a carbon micro-coil sensor, and the internal impedance value changes according to the rainfall. As the impedance value changes, the composite sensor 20 can determine the rainfall and the amount of rainfall according to the rainfall.

Also, as the rainfall occurs, the composite sensor 20 generates moisture on the inner surface of the windshield 10 due to the difference between the external temperature and the internal temperature of the windshield 10. At this time, the carbon micro coils vary in impedance depending on the moisture generated in the front glass 10, that is, the difference between the internal temperature and the external temperature. Based on the impedance change, the temperature response characteristic of the carbon micro-coil relative to the relative temperature can be confirmed.

At this time, the composite sensor 20 stores information on the temperature response characteristic of the reaction layer formed by the carbon micro coils therein, and detects the temperature change as the impedance changes.

Here, the temperature change is caused by moisture generated according to the difference between the external temperature of the vehicle and the internal temperature of the vehicle, and accordingly, the temperature response characteristic of the reaction layer of the carbon micro coils is checked according to the temperature change The relative temperature can be confirmed.

To this end, the degree of change of the impedance value of the composite sensor 20 is experimentally determined according to the temperature response characteristic of the reaction layer, that is, whether moisture is generated depending on the difference between the internal temperature and the external temperature, Information on the temperature response characteristics of the reaction layer for the reaction layer is stored in a memory (to be described later).

The composite sensor 20 can sense the relative temperature according to the difference between the internal temperature and the external temperature based on the temperature response characteristic as well as the rainfall according to the change of the impedance value.

As a result, the temperature response characteristic may mean an impedance value of the reaction layer which changes with temperature.

2, the composite sensor 20 includes a substrate 21, a sensing electrode 22, a reaction layer 23, a driving unit 24, a control unit 25, and a protective layer 26.

An adhesive layer 27 may be formed between the front glass 10 and the protective layer 26 to adhere and fix the composite sensor 20 on the surface of the front glass 10. [

The composite sensor 20 senses a change in impedance depending on the presence or absence of raindrops falling on the windshield 10 in a certain region of the inside of the windshield 10 of the vehicle and provides information for driving the wipers.

Also, the composite sensor 20 senses the relative temperature to the difference between the vehicle outside temperature and the vehicle interior temperature based on the temperature response characteristic according to the impedance change, and provides information for driving the fan.

The substrate 21 is a base substrate on which the sensing electrode 22, the reaction layer 23, and the driving unit 24 are mounted.

A sensing electrode (22) is formed on the substrate (21). The sensing electrode 22 is formed on the upper surface of the substrate 21 while being buried by the reaction layer 23.

The sensing electrode 22 is formed of a plurality of sensing electrodes 22 and senses a varying impedance as the reaction of the reaction layer 23 occurs due to the material formed on the surface of the reaction layer 23.

The sensing electrode 22 may include a first sensing electrode having a positive polarity and a second sensing electrode having a negative polarity.

The reaction layer 23 is formed on the substrate 21 and is formed by filling the upper surface of the substrate 21 and the sensing electrode 22.

Preferably, the reaction layer 23 has a predetermined thickness and is formed on the substrate 21 on which the sensing electrode 22 is formed.

The reaction layer 23 is formed of a conductive material, and has a property that an impedance changes according to a change in a force or a dielectric constant generated by an external material.

Preferably, the reaction layer 23 is a carbon microcoil (CMC) having a spring shape. That is, the reaction layer 23 is formed by depositing at least one of hydrocarbons such as acetylene, methane, propane, and benzene on the substrate 21 by a chemical vapor deposition (CVD) process. Alternatively, the reaction layer 23 may be prepared using a metal catalyst based on nickel or nickel-iron.

As shown in FIG. 3, the carbon micro-coil is an amorphous carbon fiber having a unique structure that can be shaped like a pig tail instead of a straight line, and can not have a fiber material. The carbon micro-coil has a super elasticity that extends to a length of at least 10 times the original coil length.

Fig. 3 (a) shows a coil formed in the reaction layer 23, and Fig. 3 (b) is a detailed view of the coil.

The morphology of the reaction layer 23 has a 3D-helical / spiral structure and the crystal structure is amorphous.

In other words, the reaction layer 23 is formed by growing carbon fibers into a coil shape, and accordingly, the reaction layer 23 has a cross-sectional structure in which carbon fibers are grown in a coil shape.

That is, the reaction layer 23 is formed by a force applied when a specific substance is brought into contact with the surface of the front glass 10 to which the composite sensor 20 is attached, Impedance change occurs.

The sensing electrode 22 senses a change in impedance of the reaction layer 23 and transmits a sensing signal corresponding to the impedance change to the driving unit 24.

The driving unit 24 is formed on the bottom surface of the substrate 21 and detects the presence or absence of rain and the amount of rain according to the sensing signal transmitted through the sensing electrode 22, And generates a control signal for controlling the operation of the microcomputer.

In other words, in general, REAL TERM of impedance is a resistance, POSITIVE IMAGINARY TERM is inductance, and NEGATIVE IMAGINARY TERM is capacitance, which is a sum of the resistance, inductance and capacitance.

Therefore, a pair of sensing electrodes 22 is required for sensing the change in impedance of the rain sensor 20, such as a general resistance, an inductor, and a capacitor, occurring in the reaction layer 23. The sensing electrode 22 serves to connect the reaction layer 23 and the driving unit 24 while optimizing the sensing characteristics of the reaction layer 23.

In this case, when a specific force is applied to the surface of the front glass 10 or a substance having a specific dielectric constant is contacted, the capacitance of the reaction layer 23 is increased. Accordingly, the resistance value and the inductance value Which is opposite to the capacitance.

At this time, the sensed impedance value is a sum of the resistance value, the inductance value, and the capacitance, and the impedance value is linearly decreased according to the degree of the force or the dielectric constant applied to the surface.

At this time, the sensing electrode 22 has a structure as shown in FIG. 4 and is formed on the substrate 21.

The sensing electrode 22 includes a first electrode portion formed on an edge region of the substrate 21 and a second electrode portion extending from a first end of the first electrode portion to a central region of the substrate, And a second electrode portion.

That is, the state of impedance change occurring in the reaction layer 23 varies depending on the shape of the sensing electrode 22.

Accordingly, in the present invention, in order to optimally adjust the impedance change state of the reaction layer 23, the sensing electrode 22 including the first electrode portion and the second electrode portion is formed on the substrate 21 as described above .

Meanwhile, a via 223 is formed at a lower portion of one end of the second electrode part.

The vias 223 are formed by embedding the through holes passing through the upper and lower surfaces of the substrate 21 with a metal material.

One end of the via 223 is connected to the sensing electrode 22 through the substrate 21 and the other end of the via 223 is connected to a driving unit 24 attached to the lower surface of the substrate 21 do.

The driving unit 24 is provided with an analog front end (AFE), and the sensing electrode 22 is connected to the driving unit 24 via the via 223.

At this time, the AFE carries out a differential amplification function, and there is a difference in the state of change of the impedance due to the rainfall depending on whether the differential amplification is positive amplification or negative amplification.

Accordingly, the driving unit 24 senses a change state of the impedance value based on the reference value according to the differential amplification state, and when the degree of the change state deviates from the threshold value, the driving unit 24 drives the wiper to remove the raindrop do.

Hereinafter, the driving step of the wiper will be described in more detail.

That is, when the raindrops drop, the raindrops have a certain force on the windshield 10 or cause a change in the dielectric constant.

Then, an impedance change occurs in the reaction layer 23 in accordance with the applied force or the change of the dielectric constant.

At this time, the change amount of the impedance may correspond to the rainfall amount and the rainfall amount. That is, the force and the dielectric constant applied to the reaction layer 23 increase in proportion to the amount of rainfall, and the impedance change amount decreases in inverse proportion to the increase of the dielectric constant or the force.

As described above, when the rainfall occurs, an impedance change occurs in the reaction layer 23, and an amplitude change with respect to the internal clock of the driving unit 24 occurs according to the impedance change.

The differential signal resulting from the differential amplification of the AFE of the driving unit 24 is output in accordance with the amplitude change of the internal clock.

Thereafter, when the differential signal is output, the differential signal is converted into a digital signal and transmitted to the controller 25.

The control unit 25 recognizes the rainfall amount and the rainfall amount based on the impedance change amount according to the digital signal transmitted, and when the rainfall occurs and the rainfall amount exceeds the critical point, the control unit 25 activates the wiper for raindrop removal .

Also, the controller 25 stores information on the temperature response characteristics of the reaction layer 23, and accordingly, detects the relative temperature value according to the impedance change in consideration of the temperature response characteristics.

Here, the change in the relative temperature is a change in the difference between the outside temperature of the vehicle and the inside temperature of the vehicle. Moisture is generated in the front glass 10 due to the difference between the outside temperature of the vehicle and the inside temperature of the vehicle, The impedance of the reaction layer 23 changes.

In other words, the temperature response characteristic is a characteristic that the moisture is generated according to the change of the relative temperature according to the difference between the external temperature of the vehicle and the internal temperature of the vehicle, It means the degree of change of impedance. Accordingly, if the degree of change in the impedance of the reaction layer 23 depending on whether moisture is generated or not is known, the relative temperature can be known. Accordingly, in the present invention, temperature reaction characteristic information indicating a relationship between the relative temperature due to moisture generation and the impedance of the reaction layer 23 is stored, and the controller 25 uses the stored temperature response characteristic information, Obtain the temperature.

Accordingly, the composite sensor 20 according to the present invention can be utilized as a rain sensor based on the impedance change of the reaction layer 23 as described above. Further, the composite sensor 20 can be used as a rain sensor based on the temperature response characteristics of the reaction layer 23 Can be utilized.

Based on the change in impedance of the reaction layer 23 and the temperature response characteristic, the controller 25 can determine whether rain is generated or not, and the wiper and the fan can be driven based on the determination.

5 is a view for explaining a method of manufacturing the composite sensor 20 shown in FIG.

Referring to FIG. 5, first, a liquid 81 for forming the reaction layer 23 in the plating tank 80 is prepared.

The liquid 81 may be made of a carbon micro-coil material (CMC material). At this time, the liquid 81 may contain only the carbon micro-coil material, and the resin 81 and the dispersant may be further added.

As described above, in the first step, the carbon micro-coil material and the resin are mixed and mixed in the plating bath 80, and the dispersant is further added and dispersed. The dispersant is for dispersing the liquid evenly on the substrate 21 later.

Next, a substrate 21 is prepared, and a sensing electrode 22 is formed on the prepared substrate 21.

The sensing electrodes 22 are formed in a plurality of planar structures as shown in FIG.

Next, a frame 82 is formed in the edge region of the substrate 21. [ The frame 82 covers the edge region of the substrate 21 and exposes the central region of the substrate 21 and is formed on the substrate 21.

Next, the prepared liquid 81 is injected into the mold 82 of the substrate 21.

Then, the reaction layer 23 is formed on the basis of the charged liquid 81 through an elapse of the process.

At this time, the curing process can be performed at a temperature of 120 for 30 minutes.

Hereinafter, the driving principle of the composite sensor 20 will be described in more detail.

As described above, the sensing electrode 22 is embedded in the reaction layer 23 made of carbon micro-coil (CMC). The sensing electrode 22 is connected to a driving unit 24 mounted on a lower portion of the substrate 21 through a via 26.

At this time, the reaction layer 23 itself can determine the rainfall amount and the rainfall amount according to the impedance change amount, and the sensitivity of measurement also varies according to the shape of the sensing electrode 22. [ Accordingly, in the embodiment, the sensing electrode 22 having the planar shape as described above is formed.

Therefore, in the embodiment, it is important to optimize various factors such as the composition of the carbon micro-coil content ratio, the optimized electrode shape, and the mounting position of the driving unit 24.

Also, as described above, the impedance is composed of a real part and an imaginary part, and the imaginary part is composed of a positive imaginary part and a negative imaginary part, The rain sensor 20 measures a change in two characteristics of the positive inductive and the negative inductive.

That is, when the rain comes, the force applied to the windshield 10 of the vehicle varies depending on the amount of rain, and the amount of water (raindrops) existing in the windshield 10 also varies.

At this time, Carbon Micro Coil (CMC), as its name implies, consists of a very fine coil group and is also a dielectric with a dielectric constant.

In this case, the force is measured through a change in the imaginary component of the positive, that is, a change in the characteristic of the carbon fine coil, and the amount of water present on the windshield 10 is determined by the imaginary part change .

In other words, each layer constituting the composite sensor 20 serves as a dielectric having a specific dielectric constant. If the electrode is not exposed to light as described above, a dielectric substance called water will newly exist in the electrode, resulting in a capacitive change .

At this time, the real part can be adjusted according to the area of the reaction layer 23, and when the ratio is increased, the impedance value changes due to inductive and capacitive values as described above.

Therefore, in the embodiment, the change of the impedance value according to the change of inductive and capacitive values of the composite sensor 20 as described above is detected to determine the rainfall amount and the rainfall amount.

The composite sensor 20 as described above forms an adhesive layer 27 such as silicon on the inner side of the front glass 10 and is mounted on a specific inner region of the front glass 10 by the adhesive layer 27 .

At this time, the composite sensor 20 senses a change in impedance in consideration of the dielectric constant of the adhesive layer 27.

In addition, the reaction layer 23 of the composite sensor 20 has the characteristic that the impedance changes according to the temperature. Here, the temperature means the difference between the inside temperature and the outside temperature on the inner surface of the windshield 10.

Accordingly, in the present invention, the temperature response characteristic indicating the change of the impedance value according to the temperature of the reaction layer 23 of the composite sensor 20 is stored, and the temperature of the reaction layer 23 corresponding to the impedance value It is possible to confirm the relative temperature with respect to the difference between the internal temperature and the external temperature by checking the reaction characteristics.

6 shows characteristics of a carbon micro-coil according to an embodiment of the present invention.

As shown in FIG. 6, the carbon micro-coil has a first in-phase value at normal times, and the inductance value decreases as a force or a dielectric constant is applied to the carbon micro-coil.

The inductance value has a different amount of reduction depending on the type of material placed on the carbon micro-coil.

That is, the inductance value has a relatively small amount of reduction when the rainfall due to rainfall comes into contact with the carbon micro-coil, and when the part of the human body such as a human is in contact with the rainfall, When the substance is in contact, the amount of reduction is higher than in the case where the rainwater or the human body is in contact with the rainwater.

FIG. 7 is a diagram for explaining a drive reference of the composite sensor shown in FIG. 2. FIG.

Referring to FIG. 7, the control unit 25 confirms the relative temperature based on the impedance change of the reaction layer 23, which changes with time.

The control unit 25 determines whether the amount of change of the relative temperature exceeds a predetermined threshold based on the amount of change of the relative temperature with time.

Here, the critical point may be a reference point at which moisture is generated according to the relative temperature, and may preferably be a relative humidity starting point.

If the change amount of the relative temperature exceeds the predetermined threshold, the control unit 25 determines that the possibility of moisture generation or moisture generation is high, and drives the fan to remove the moisture.

8 is a cross-sectional view showing a detailed structure of a composite sensor according to a second embodiment of the present invention.

8, the composite sensor 20 includes a substrate 21, a sensing electrode 22, a reaction layer 23, a driving unit 24, a control unit 25, a protective layer 26, and an external temperature sensor 28 ).

An adhesive layer 27 may be formed between the front glass 10 and the protective layer 26 to adhere and fix the composite sensor 20 on the surface of the front glass 10. [

The structure of the substrate 21, the sensing electrode 22, the reaction layer 23, the driving unit 24, the control unit 25 and the protective layer 26 in the configuration of FIG. 8 is already described with reference to FIG. 2 A detailed description thereof will be omitted.

In Fig. 8, an external temperature sensor 28 may be further disposed on the substrate 21. Fig.

The external temperature sensor 28 is arranged to face the inner surface of the windshield 10 to measure the temperature of the inner surface of the windshield 10, that is, the temperature of the outside of the vehicle.

In order to improve the accuracy of temperature measurement of the external temperature sensor 28, one part of the protective layer 26 facing the surface of the external temperature sensor 28 and one part of the adhesive layer 27 A first opening 285 is formed.

The first opening 285 is formed to penetrate the protective layer 26 and a portion of the adhesive layer 27, which overlap the surface of the external temperature sensor 28. Thus, external air can be introduced into the protective layer 26 through the first opening 285, so that a more accurate external temperature can be measured through the external temperature sensor 28.

In the first embodiment, the control unit 25 determines whether the moisture is generated in consideration of only the temperature response characteristic of the reaction layer 23, and drives the fan based on the determination. However, in the second embodiment, the fan is driven on the basis of the difference value based on the external temperature and the relative temperature.

Fig. 9 is a diagram for explaining the drive reference of the composite sensor shown in Fig. 8. Fig.

Referring to FIG. 9, the controller 25 confirms the relative temperature based on the impedance change of the reaction layer 23, which changes with time.

Then, the control unit 25 confirms the measured external temperature (absolute temperature) through the external temperature sensor 28.

Then, the control unit 25 confirms the difference between the relative temperature and the absolute temperature. At this time, a driving signal for driving the fan is generated according to the difference value. In other words, in the second embodiment, the reference point for the relative humidity starting point at which moisture starts to be generated in advance according to the difference value between the external temperature and the relative temperature is determined. The control unit 25 determines that moisture has occurred at a point of time when the difference between the relative temperature and the absolute temperature exceeds a preset critical point, and outputs a driving signal for driving the fan accordingly.

10 is a cross-sectional view showing a detailed structure of a composite sensor according to a third embodiment of the present invention.

10, the composite sensor 20 includes a substrate 21, a sensing electrode 22, a reaction layer 23, a driving unit 24, a control unit 25, a protective layer 26, and an internal temperature sensor 29 ).

An adhesive layer 27 may be formed between the front glass 10 and the protective layer 26 to adhere and fix the composite sensor 20 on the surface of the front glass 10. [

The structure of the substrate 21, the sensing electrode 22, the reaction layer 23, the driving unit 24, the control unit 25 and the protective layer 26 in the configuration of FIG. 10 is already described with reference to FIG. 2 A detailed description thereof will be omitted.

In Fig. 10, an internal temperature sensor 29 may be additionally disposed on the lower surface of the substrate 21. Fig.

The internal temperature sensor 29 is disposed on the lower surface of the substrate 21 opposite to the inner surface of the windshield 10 to measure the internal temperature of the vehicle.

In order to increase the temperature measurement accuracy of the internal temperature sensor 29, a second opening 295 for opening one region of the protection layer 26 facing the surface of the internal temperature sensor 29 Is formed.

The first opening 295 is formed through a portion of the protection layer 26 which overlaps the surface of the internal temperature sensor 29. Thus, the vehicle interior air can be introduced into the protective layer 26 through the second opening 295, so that a more accurate external temperature can be measured through the internal temperature sensor 29 .

In the first embodiment, the control unit 25 determines whether the moisture is generated in consideration of only the temperature response characteristic of the reaction layer 23, and drives the fan based on the determination. In the second embodiment, the fan is driven based on the difference between the external temperature and the relative temperature.

However, in the third embodiment, the fan is driven based on the difference between the internal temperature and the relative temperature.

11 is a diagram for explaining a drive reference of the composite sensor shown in FIG.

Referring to FIG. 11, the controller 25 confirms the relative temperature based on the impedance change of the reaction layer 23, which changes with time.

Then, the control unit 25 confirms the internal temperature (absolute temperature) measured through the internal temperature sensor 29.

Then, the control unit 25 confirms the difference between the relative temperature and the absolute temperature. At this time, a driving signal for driving the fan is generated according to the difference value. In other words, in the third embodiment, the reference point for the relative humidity starting point at which moisture starts to be generated according to the difference value between the internal temperature and the relative temperature is determined in advance. The control unit 25 determines that moisture has occurred at a point of time when the difference between the relative temperature and the absolute temperature exceeds a preset critical point, and outputs a driving signal for driving the fan accordingly.

12 is a cross-sectional view showing a detailed structure of a composite sensor according to a fourth embodiment of the present invention.

12, the composite sensor 20 includes a substrate 21, a sensing electrode 22, a reaction layer 23, a driving unit 24, a control unit 25, a protective layer 26, an external temperature sensor 28 And an internal temperature sensor 29.

An adhesive layer 27 may be formed between the front glass 10 and the protective layer 26 to adhere and fix the composite sensor 20 on the surface of the front glass 10. [

The structure of the substrate 21, the sensing electrode 22, the reaction layer 23, the driving unit 24, the control unit 25 and the protective layer 26 in the configuration of FIG. 12 is already described with reference to FIG. 2 A detailed description thereof will be omitted.

12, an external temperature sensor 28 is disposed on the upper surface of the substrate 21, and an internal temperature sensor 29 is disposed on the lower surface of the substrate 21.

A first opening 285 is formed in the adhesive layer 27 and the protective layer 26 corresponding to the external temperature sensor 28 and the protective layer 26 facing the surface of the internal temperature sensor 29 The second opening 295 is formed.

The first opening 295 is formed through a portion of the protection layer 26 which overlaps the surface of the internal temperature sensor 29. Thus, the vehicle interior air can be introduced into the protective layer 26 through the second opening 295, so that a more accurate external temperature can be measured through the internal temperature sensor 29 .

In the first embodiment, the control unit 25 determines whether the moisture is generated in consideration of only the temperature response characteristic of the reaction layer 23, and drives the fan based on the determination. In the second embodiment, the fan is driven based on the difference between the external temperature and the relative temperature. In the third embodiment, the fan is driven based on the difference between the internal temperature and the relative temperature.

However, in the fourth embodiment, it is determined whether the moisture is generated using the relative temperature, the external temperature, and the internal temperature, and the fan is driven accordingly.

For this, the control unit 25 acquires the relative temperature based on the temperature response characteristic of the reaction layer 23. The controller 25 acquires the external temperature through the external temperature sensor 28. Here, the external temperature may be the vehicle outside temperature as described above. However, clearly, the external temperature may be the temperature of the inner surface of the windshield 10.

Here, the relative temperature is closely related to the external temperature measured through the external temperature sensor 28. [ In other words, the external temperature varies according to the relative temperature. Accordingly, the control unit 25 can compensate the measured external temperature through the external temperature sensor 28 based on the relative temperature.

In other words, the control unit 25 stores information on the relationship between the external temperature measured through the external temperature sensor 28 and the relative temperature, and based on the relationship between the external temperature and the relative temperature, And compensates the temperature to obtain the compensated external temperature.

The controller 25 acquires the internal temperature through the internal temperature sensor 29.

Thereafter, the controller 25 acquires the relative humidity information based on the difference between the compensated external temperature and the internal temperature, so that the difference between the external temperature and the internal temperature exceeds the predetermined threshold (relative humidity starting point) The fan is driven.

13 is a diagram for explaining a drive reference of the composite sensor shown in Fig.

Referring to FIG. 13, the control unit 25 confirms the relative temperature based on the impedance change of the reaction layer 23, which changes with time.

In addition, the controller 25 acquires the external temperature through the external temperature sensor 28. The control unit 25 compensates the obtained external temperature using the relative temperature.

Also, the controller 25 confirms the internal temperature (absolute temperature) value measured through the internal temperature sensor 29.

Then, the control unit 25 confirms the difference between the compensated external temperature and the internal temperature. At this time, a driving signal for driving the fan is generated according to the difference value. In other words, in the fourth embodiment, a reference point for the relative humidity starting point at which moisture starts to occur according to the difference value between the internal temperature and the compensated external temperature in advance is determined. The control unit 25 determines that moisture has occurred at a point of time when the difference between the compensated external temperature and the internal temperature exceeds a preset critical point, and outputs a driving signal for driving the fan accordingly.

FIG. 14 is a cross-sectional view showing a detailed structure of a composite sensor according to a fifth embodiment of the present invention.

14, the composite sensor 20 includes a substrate 21, a sensing electrode 22, a reaction layer 23, a driving unit 24, a control unit 25, a protective layer 26, an external temperature sensor 28 ), An internal temperature sensor (29), and a humidity sensor (30).

An adhesive layer 27 may be formed between the front glass 10 and the protective layer 26 to adhere and fix the composite sensor 20 on the surface of the front glass 10. [

14, the substrate 21, the sensing electrode 22, the reaction layer 23, the driving unit 24, the control unit 25, the protective layer 26, the external temperature sensor 28, Since the configuration of the temperature sensor 29 has already been described with reference to FIG. 12, a detailed description thereof will be omitted.

14, an external temperature sensor 28 is disposed on the upper surface of the substrate 21, and an internal temperature sensor 29 is disposed on the lower surface of the substrate 21.

A first opening 285 is formed in the adhesive layer 27 and the protective layer 26 corresponding to the external temperature sensor 28 and the protective layer 26 facing the surface of the internal temperature sensor 29 The second opening 295 is formed.

The first opening 295 is formed through a portion of the protection layer 26 which overlaps the surface of the internal temperature sensor 29. Thus, the vehicle interior air can be introduced into the protective layer 26 through the second opening 295, so that a more accurate external temperature can be measured through the internal temperature sensor 29 .

Further, a humidity sensor 30 is further disposed on the lower surface of the substrate 21.

In the first embodiment, the control unit 25 determines whether the moisture is generated in consideration of only the temperature response characteristic of the reaction layer 23, and drives the fan based on the determination. In the second embodiment, the fan is driven based on the difference between the external temperature and the relative temperature. In the third embodiment, the fan is driven based on the difference between the internal temperature and the relative temperature. In the fourth embodiment, it is determined whether the moisture is generated using the relative temperature, the external temperature, and the internal temperature, and the fan is driven accordingly.

However, in the fifth embodiment, the relative humidity amount is obtained based on the difference between the internal temperature and the external temperature, the internal humidity amount is obtained through the humidity sensor 30, and the relative humidity amount and the internal humidity amount So as to drive the fan.

For this, the control unit 25 acquires the relative temperature based on the temperature response characteristic of the reaction layer 23. The controller 25 acquires the external temperature through the external temperature sensor 28. Here, the external temperature may be the vehicle outside temperature as described above. However, clearly, the external temperature may be the temperature of the inner surface of the windshield 10.

Here, the relative temperature is closely related to the external temperature measured through the external temperature sensor 28. [ In other words, the external temperature varies according to the relative temperature. Accordingly, the control unit 25 can compensate the measured external temperature through the external temperature sensor 28 based on the relative temperature.

In other words, the control unit 25 stores information on the relationship between the external temperature measured through the external temperature sensor 28 and the relative temperature, and based on the relationship between the external temperature and the relative temperature, And compensates the temperature to obtain the compensated external temperature.

The controller 25 acquires the internal temperature through the internal temperature sensor 29.

Then, the controller 25 acquires the relative humidity information based on the difference between the compensated external temperature and the internal temperature.

Also, the controller 25 acquires the internal humidity information through the humidity sensor 30.

Thereafter, the control unit 25 checks the difference between the relative humidity information and the internal humidity information, and drives the fan when the difference exceeds a predetermined threshold (relative humidity starting point).

Fig. 15 is a diagram for explaining the drive reference of the composite sensor shown in Fig. 14. Fig.

Referring to FIG. 15, the controller 25 confirms the relative temperature based on the impedance change of the reaction layer 23, which changes with time.

In addition, the controller 25 acquires the external temperature through the external temperature sensor 28. The control unit 25 compensates the obtained external temperature using the relative temperature.

Also, the controller 25 confirms the internal temperature (absolute temperature) value measured through the internal temperature sensor 29.

Then, the control unit 25 acquires the relative humidity amount based on the difference between the compensated external temperature and the internal temperature.

In addition, the controller 25 acquires the internal humidity amount through the humidity sensor 30. [ Thereafter, the control unit 25 checks the difference between the relative humidity and the internal humidity, and outputs a driving signal for driving the fan when the determined difference exceeds a predetermined threshold value.

In other words, in the fifth embodiment, a reference point is determined with respect to a relative humidity starting point at which moisture starts to occur according to the difference value between the relative humidity and the inside humidity in advance. Then, the control unit 25 determines that moisture has occurred at a time point when the difference between the relative humidity and the internal humidity exceeds a predetermined threshold, and outputs a driving signal for driving the fan accordingly.

16 is a block diagram illustrating a configuration of a compound sensing apparatus according to an embodiment of the present invention.

Referring to FIG. 16, the complex sensing apparatus includes a sensor unit 20, a rain sensing unit 24, a controller 25, a memory 40, a wiper driving unit 50, and a fan driving unit 60.

The sensor unit 20 senses whether rain or rain is generated. Here, the sensor unit 20 may include only a first sensor including a reaction layer 23 made of carbon micro-coil.

In addition to the first sensor, the sensor unit 20 further includes an external temperature sensor 28 for measuring the temperature of the windshield 10 (i.e., an external temperature) and an internal temperature sensor 29). ≪ / RTI >

In addition to the first sensor, the sensor unit 20 further includes an external temperature sensor 28 for measuring the temperature of the windshield 10 (i.e., an external temperature) and an internal temperature sensor 29).

In addition to the first sensor, the external temperature sensor 28 and the internal temperature sensor 29, the sensor unit 20 may further include a humidity sensor 29 for measuring the humidity inside the vehicle .

The memory 30 stores information for controlling various components of the vehicle. Particularly, in the memory 30, the rain information according to the impedance change of the reaction layer 23 is stored.

The temperature response characteristic information of the reaction layer 23 is stored in the memory 30. The temperature response characteristic information includes impedance information of the reaction layer 23 varying with temperature. Here, the temperature may mean a difference between the internal temperature of the vehicle and the external temperature.

In addition, the memory 30 may store first threshold information for determining whether moisture is generated according to a temperature response characteristic of the reaction layer 23. The first critical point may be a starting point at which the generation of relative humidity is started according to a variation amount of the relative temperature obtained by the reaction layer 23. [

Second threshold information for determining whether moisture is generated is stored in the memory 30 according to a temperature response characteristic of the reaction layer 23 and a difference value between the external temperature obtained by the external temperature sensor 28 .

The memory 30 stores third threshold information for determining whether moisture is generated according to the temperature response characteristic of the reaction layer 23 and the difference between the internal temperature obtained by the internal temperature sensor 29 .

The memory 30 is also provided with a fourth temperature sensor for judging whether moisture is generated or not according to the difference between the external temperature compensated by the temperature response characteristic of the reaction layer 23 and the internal temperature obtained by the internal temperature sensor 29, Critical point information can be stored.

In addition, the memory 30 may be provided with a controller 30 for determining whether moisture is generated according to a difference between a relative humidity amount corresponding to the difference between the compensated external temperature and the internal temperature and an internal humidity amount obtained through the humidity sensor 30 5 More threshold information can be stored.

The rainfall sensing unit 24 acquires the rainfall amount and the rainfall amount according to the impedance change of the reaction layer 23 using the information stored in the memory 30.

The control unit 25 controls the overall operation of the complex sensing device.

Particularly, the control unit 25 obtains the impedance change amount information of the reaction layer 23 transmitted through the rainfall sensing unit 24, determines the rainfall amount and the rainfall amount based on the impedance change amount, When the rainfall amount exceeds the critical point, the wiper for raindrop removal is operated.

Also, the control unit 25 obtains the relative temperature value according to the impedance change by using the information about the temperature response characteristic of the reaction layer 23. The control unit 25 determines whether the amount of change of the relative temperature value exceeds a preset first critical point by using the critical point information stored in the memory 30.

If the relative temperature value exceeds the first critical point, the control unit 25 outputs a driving signal for fan driving.

When the external temperature sensor 28 is included in the sensor unit 20, the control unit 25 confirms the relative temperature based on the impedance change of the reaction layer 23 which changes with time. Then, the control unit 25 confirms the measured external temperature (absolute temperature) through the external temperature sensor 28. Then, the control unit 25 confirms the difference between the relative temperature and the absolute temperature. At this time, the control unit 25 determines that moisture has occurred at a point of time when the difference exceeds the predetermined second critical point, and outputs a driving signal for driving the fan accordingly.

If the sensor unit 20 includes the internal temperature sensor 29, the control unit 25 checks the internal temperature (absolute temperature) measured through the internal temperature sensor 29.

Then, the control unit 25 confirms the difference between the relative temperature and the absolute temperature. Thereafter, the controller 25 determines that moisture has occurred at a point of time when the difference exceeds the preset third critical point, and outputs a driving signal for driving the fan accordingly.

When the external temperature sensor 28 and the internal temperature sensor 29 are included in the sensor unit 20, the control unit 25 checks the relative temperature based on the impedance change of the reaction layer 23 .

In addition, the controller 25 acquires the external temperature through the external temperature sensor 28. The control unit 25 compensates the obtained external temperature using the relative temperature.

Also, the controller 25 confirms the internal temperature (absolute temperature) value measured through the internal temperature sensor 29.

The control unit 25 checks the difference between the compensated external temperature and the internal temperature and determines that moisture has occurred at a point of time when the difference exceeds the predetermined fourth threshold point, And outputs a driving signal for driving.

When the sensor unit 20 includes the external temperature sensor 28, the internal temperature sensor 29 and the humidity sensor 30, the control unit 25 controls the temperature of the reaction layer 23, which changes with time, Check the relative temperature based on the impedance change. In addition, the controller 25 acquires the external temperature through the external temperature sensor 28. The control unit 25 compensates the obtained external temperature using the relative temperature. Also, the controller 25 confirms the internal temperature (absolute temperature) value measured through the internal temperature sensor 29. Then, the control unit 25 acquires the relative humidity amount based on the difference between the compensated external temperature and the internal temperature. In addition, the controller 25 acquires the internal humidity amount through the humidity sensor 30. [ Thereafter, the control unit 25 confirms the difference between the relative humidity and the internal humidity, and outputs a driving signal for driving the fan when the determined difference exceeds the predetermined fifth threshold.

17 is a view for explaining a fan driving criterion according to an embodiment of the present invention.

Referring to FIG. 17, there is no difference between the external temperature and the internal temperature, but the condition A in which the room humidity is high means that there is no temperature difference between the inside / outside in the rainy season, but basically the humidity is high. However, in the present invention, moisture is generated on the surface of the reaction layer 23, and therefore, the reaction layer 23 So that the moisture generation can be accurately detected.

In addition, in the present invention, there is a difference between the external temperature and the internal temperature, and even if the room humidity is high, whether or not normal humidity is generated is detected and the fan can be driven accordingly.

In addition, in the present invention, the fan driving is stopped in the C condition with no difference between the external temperature and the internal temperature, and the fan driving is stopped even under the D condition in which the room temperature and the internal temperature are different.

18 to 22 are flowcharts for explaining the operation of the composite sensor according to the embodiment of the present invention step by step.

Referring to FIG. 18, the composite sensor 20 detects a change in impedance depending on whether rainfall occurs in the windshield 10 of the vehicle (Step 10).

The composite sensor 20 transmits sensing information on the sensed impedance change to the controller 25.

The control unit 25 receives the sensing information indicating the impedance change, and determines whether rainfall or rainfall according to the amount of impedance change is based on the sensed information.

Then, if the rainfall has occurred, the control unit 25 determines whether the rainfall amount has exceeded the critical point (step 30). Whether or not the critical point is exceeded may be determined by whether the impedance change amount exceeds the critical point.

If the rainfall exceeds the critical point, the controller 25 determines the driving speed of the wiper 40 to be driven according to the rainfall (step 40).

Then, the control unit 25 drives the wiper 40 at the determined driving speed (step 50).

Referring to FIG. 19, the controller 25 detects a change in impedance of the reaction layer 23 (step 110).

Then, the controller 25 checks the temperature response characteristic of the reaction layer 23, that is, the carbon micro coils according to the impedance change (operation 120).

Then, the control unit 25 calculates a relative temperature for the difference between the inside temperature and the outside temperature according to the impedance based on the temperature response characteristic (operation 130).

In step 140, the control unit 25 determines whether the change amount of the relative temperature has exceeded a preset first threshold.

If the variation of the relative temperature exceeds the predetermined first critical point, the control unit 25 determines that moisture has occurred in the windshield 10 and outputs a control signal for driving the fan accordingly ).

Referring to FIG. 20, a change in impedance of the reaction layer 23, which changes with time, is sensed (step 210).

Then, the controller 25 confirms the temperature response characteristic of the reaction layer 23, that is, the carbon micro coils according to the impedance change (step 220).

Thereafter, the control unit 25 calculates a relative temperature for a difference between the internal temperature and the external temperature according to the impedance based on the temperature response characteristic (step 230).

Also, the controller 25 confirms the internal temperature (absolute temperature) value measured through the internal temperature sensor 29 (step 240).

In step 250, the controller 25 determines a difference between the relative temperature and the absolute temperature.

Thereafter, the controller 25 determines whether the difference value exceeds a preset third threshold (step 260).

The control unit 25 determines that moisture has occurred at a point of time when the difference exceeds the preset third threshold, and outputs a driving signal for driving the fan according to the detected humidity (step 270).

Referring to FIG. 21, the controller 25 senses a change in impedance of the reaction layer 23 that changes with time, and determines a temperature response characteristic of the carbon micro-coil according to the change in impedance.

In step 320, the control unit 25 calculates a relative temperature for the difference between the vehicle interior temperature and the external temperature according to the impedance based on the temperature response characteristic.

In addition, the controller 25 acquires the external temperature through the external temperature sensor (step 330). The controller 25 compensates the obtained external temperature using the relative temperature (operation 340).

Also, the controller 25 checks the internal temperature (absolute temperature) value measured through the internal temperature sensor 29 (operation 350).

Then, the control unit 25 checks the difference between the compensated external temperature and the internal temperature (operation 360).

Thereafter, the control unit 25 determines whether the difference value exceeds a predetermined fourth threshold value (Step 370).

In step 380, the controller 25 determines that moisture has occurred at a point of time when the difference exceeds the preset fourth critical point, and outputs a driving signal for driving the fan accordingly.

Referring to FIG. 22, the control unit 25 obtains the compensated external temperature based on the relative temperature as described above (operation 410).

Thereafter, the controller 25 acquires the internal temperature through the internal temperature sensor (step 420).

Also, the controller 25 calculates the relative humidity based on the difference between the compensated external temperature and the obtained internal temperature (operation 430).

Then, the controller 25 acquires the internal humidity through the humidity sensor 30 (step 440).

Thereafter, the control unit 25 checks the difference between the relative humidity amount and the internal humidity amount (operation 450).

Then, the controller 25 determines whether the difference value exceeds a predetermined fifth threshold (step 460).

Then, the control unit 25 outputs a driving signal for driving the fan if the difference exceeds the preset fifth threshold.

According to the embodiment of the present invention, it is possible to judge whether moisture is generated by using the rain sensor, so that the product unit price according to the individual sensor can be remarkably reduced.

In addition, according to the embodiment of the present invention, by detecting the presence or absence of rain and the occurrence of moisture using the composite sensor, it is possible to drive the fan according to moisture generation automatically, not by a user, have.

In addition, in the embodiment of the present invention, the moisture sensor and the rain sensor are constituted by one package, so that the space occupied by the individual sensors can be saved, and the satisfaction of the design can be improved accordingly.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention.

10: Front glass
20: Composite sensor
21: substrate
22: Electrode
23: Reaction layer
24:
25:
26: Protective layer
27: Adhesive layer
28: External temperature sensor
29: Internal temperature sensor
30: Humidity sensor

Claims (24)

Board;
A first sensor disposed on an upper surface of the substrate and including a carbon micro-coil;
A driving unit disposed on a lower surface of the substrate to obtain rainfall information based on an impedance value of the first sensor;
A controller disposed on the lower surface of the substrate for obtaining relative temperature information according to an impedance value of the first sensor based on the temperature response characteristic of the first sensor and acquiring moisture generation information based on the relative temperature information; And
And a protective layer surrounding the substrate, the first sensor, the driving unit, and the control unit,
Wherein the first sensor comprises:
A sensing electrode disposed on the substrate,
And a reaction layer composed of carbon micro-coils disposed on the substrate to embed the sensing electrodes.
Hybrid sensor package. The method according to claim 1,
And a second sensor disposed on the upper surface of the substrate and accommodated in the protective layer, the second sensor measuring a first temperature
Hybrid sensor package. 3. The method of claim 2,
The protective layer may be formed,
Wherein an opening portion is formed in an area overlapping vertically above the surface of the second sensor
Hybrid sensor package. The method according to claim 1,
And a third sensor disposed on the lower surface of the substrate and housed in the protective layer, the third sensor measuring a second temperature
Hybrid sensor package. 3. The method of claim 2,
The protective layer may be formed,
An opening is formed in an area overlapping vertically downward with the surface of the third sensor
Hybrid sensor package. The method according to claim 1,
A second sensor disposed on the upper surface of the substrate and accommodated in the protective layer, the second sensor measuring a first temperature; And
And a third sensor disposed on a lower surface of the substrate and accommodated in the protective layer, the third sensor measuring a second temperature,
The protective layer may be formed,
A first opening formed in a region vertically overlapping with a surface of the second sensor,
And a second opening formed in a region overlapping vertically downward with the surface of the third sensor
Hybrid sensor package. The method according to claim 6,
Further comprising a fourth sensor disposed on the lower surface of the substrate and housed in the protective layer, for measuring humidity,
Wherein the surface of the fourth sensor
And is exposed to the outside through the second opening
Hybrid sensor package. 8. The method of claim 7,
Wherein,
Acquiring rainfall information based on an impedance value of the first sensor,
And acquires moisture generation information based on the sensed values through the first to fourth sensors
Hybrid sensor package. A first sensor attached to the inner surface of the windshield of the vehicle, the sensor comprising a carbon micro-coil whose impedance value changes according to an external contact material;
A rainfall sensing unit for determining rainfall amount and rainfall amount based on an impedance value of the first sensor; And
And a controller for obtaining a relative temperature according to an impedance change of the first sensor based on the temperature response characteristic of the first sensor and determining whether moisture is generated based on the obtained relative temperature
Complex sensing device. 10. The method of claim 9,
Further comprising a memory for storing temperature response characteristic information of the first sensor indicating a relationship between a relative temperature according to a difference between an external temperature of the vehicle and an internal temperature of the vehicle and an impedance value of the first sensor
Complex sensing device. 11. The method of claim 10,
Wherein,
Acquiring the relative temperature based on the temperature response characteristic information stored in the memory,
And outputs a signal for driving the fan when the variation amount of the relative temperature exceeds a predetermined first critical point
Complex sensing device. 11. The method of claim 10,
Further comprising a second sensor for sensing an outside temperature of the vehicle,
Wherein,
When the difference between the relative temperature acquired through the first sensor and the external temperature acquired through the second sensor exceeds a predetermined second threshold,
Complex sensing device. 11. The method of claim 10,
Further comprising a third sensor for sensing an internal temperature of the vehicle,
Wherein,
When the difference between the relative temperature acquired through the first sensor and the internal temperature acquired through the third sensor exceeds a predetermined third threshold,
Complex sensing device. 11. The method of claim 10,
A second sensor for sensing an outside temperature of the vehicle; And
Further comprising a third sensor for sensing an internal temperature of the vehicle,
Wherein,
Whether or not the moisture is generated is determined based on the relative temperature acquired through the first sensor, the external temperature acquired through the second sensor, and the internal temperature acquired through the third sensor
Complex sensing device. 15. The method of claim 14,
Wherein,
And compensates an external temperature acquired through the second sensor based on the relative temperature acquired through the first sensor
Complex sensing device. 16. The method of claim 15,
Wherein,
When the difference between the compensated external temperature and the internal temperature acquired through the third sensor exceeds a preset fourth threshold, a signal for driving the fan is output
Complex sensing device. 17. The method of claim 16,
Further comprising a fourth sensor for sensing an internal humidity of the vehicle,
Wherein,
Acquiring a relative humidity amount based on a difference between the compensated external temperature and the obtained internal temperature, and outputting a signal for driving the fan when the difference between the relative humidity amount and the internal humidity amount exceeds a preset fifth threshold doing
Complex sensing device. Obtaining an impedance value of a first sensor attached to the inner surface of the windshield of the vehicle;
Obtaining rainfall information based on the obtained impedance value;
Outputting a wiper drive signal based on the obtained rainfall information;
Obtaining a relative temperature according to the impedance value based on the temperature response characteristic of the first sensor;
Obtaining moisture generation information based on the obtained relative temperature; And
And outputting a fan drive signal based on the obtained moisture generation information
A method of operating a complex sensing device. 19. The method of claim 18,
Storing the temperature response characteristic information of the first sensor indicating a relationship between a relative temperature according to a difference between an external temperature of the vehicle and an internal temperature of the vehicle and an impedance value of the first sensor
A method of operating a complex sensing device. 20. The method of claim 19,
Wherein the acquiring of the moisture generation information comprises:
Obtaining the relative temperature according to an impedance value of the first sensor based on the stored temperature response characteristic information;
Determining whether the change amount of the relative temperature exceeds a predetermined first critical point
A method of operating a complex sensing device. 20. The method of claim 19,
Further comprising sensing an outside temperature of the vehicle,
Wherein the acquiring of the moisture generation information comprises:
Obtaining the relative temperature according to an impedance value of the first sensor based on the stored temperature response characteristic information;
Determining whether the difference between the obtained relative temperature and the sensed external temperature exceeds a predetermined second critical point
A method of operating a complex sensing device. 20. The method of claim 19,
Further comprising sensing an internal temperature of the vehicle,
Wherein the acquiring of the moisture generation information comprises:
Obtaining the relative temperature according to an impedance value of the first sensor based on the stored temperature response characteristic information;
Determining whether a difference between the relative temperature obtained through the first sensor and the sensed internal temperature exceeds a preset third critical point,
A method of operating a complex sensing device. 20. The method of claim 19,
Further comprising sensing an external temperature of the vehicle and an internal temperature of the vehicle,
Wherein the acquiring of the moisture generation information comprises:
Obtaining the relative temperature according to an impedance value of the first sensor based on the stored temperature response characteristic information;
Compensating the sensed external temperature based on the relative temperature acquired through the first sensor;
Determining whether the difference between the compensated external temperature and the sensed internal temperature exceeds a preset fourth critical point,
A method of operating a complex sensing device. 24. The method of claim 23,
Further comprising sensing an internal humidity of the vehicle,
Wherein the acquiring of the moisture generation information comprises:
Obtaining a relative humidity amount based on a difference between the compensated external temperature and the obtained internal temperature,
Determining whether a difference value between the relative humidity amount and the sensed amount of internal humidity exceeds a preset fifth threshold
A method of operating a complex sensing device.

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