KR20100025200A - Rain sensor - Google Patents

Abstract

PURPOSE: A rain sensor for sensing the inside of a room is provided to receive infrared beam which is reflected from a front glass of a vehicle through an infrared filter and a prism. CONSTITUTION: A rain sensor for sensing the inside of a room comprises a lighting-emitting part(710), a light receiving part(720), a groove(695), a prism(600), and a detection sensor(700). The lighting-emitting part and the light receiving part are installed in order to face the opposite side of a substrate. The prism comprises the groove which accepts the lighting-emitting part and the light receiving part. Plural sides are formed on the prism to refract or reflect the light emitted from the lighting-emitting part in multi-steps.

Description

Indoor Sensor with Rain Sensor {RAIN SENSOR}

The present invention relates to a rain sensor, and more particularly, a light receiving unit and a light emitting unit are accommodated inside a groove formed by opening a portion of the center of one side end of the lower infrared total use prism and the upper raindrop detection prism. The present invention relates to a rain sensor for both indoor and rear surfaces, which measures the amount of raindrops on the windshield of the vehicle by simultaneously emitting front or rear light according to the position of the light emitting unit.

In general, the rain wiper is controlled and operated in ETACS or BCM. In the case of a vehicle equipped with the wiper automatic operation mode, as shown in FIG. 1, the wiper motor driving signal is output using the results detected by the rain sensor 10 in addition to the wiper driving motor 12 and the rain sensor 10. A rain sensor unit 11 is further provided. In rainy weather, the rain sensor 10 detects water droplets formed on the glass window, and detects whether it rains or not, or whether it rains a lot or falls, and uses the signal to drive the wiper.

However, in the conventional rain sensor system, since the transmittance of the front glass was determined above the center point of the LED and the photo sensor, there was a problem in that the amount of rainwater could not be accurately measured.

In order to solve this problem, the rain sensor shown in FIG. 2 has been devised and is currently patented. Looking at the rain sensor of Figure 2, one or more light emitting portion 110 provided toward the lower side of the PCB substrate 180, the first facing the upper portion facing the light emitting portion 110, the first provided provided upward The reflector 130, a second reflector 140 disposed upwardly at a predetermined angle to the side, or a first reflector 140 disposed in a path of light between the second reflector 140 and the windshield 150 of the vehicle. The lens 160 includes a light receiving unit 120 disposed on an upper surface of the PCB substrate 180, and a second lens 160 disposed in a path of light between the light receiving unit 120 and the windshield 150 of the vehicle. .

Referring to the operation of the rain sensor system shown in FIG. 2, when the wiper automatic operation mode is selected according to the driver's operation in rainy weather, the controller 110 controls the light emitting unit 110 to emit light periodically.

When the light emitter 110 emits light in response to a light emission control signal of the controller, an infrared beam is emitted, and the inclined surface 131 is formed to the left and right of the first reflector 130 spaced at a predetermined interval below. Incident.

The infrared beam incident on the inclined surface 131 is reflected by the inclined surface 131, and the reflected infrared beam is reflected again while being incident on the second reflector 140, and the reflected infrared beam is first reflected. Focused by the lens 160 is incident on the windshield 150 of the vehicle.

The infrared beam incident on the windshield 150 of the vehicle is reflected by the windshield 150, and the reflected infrared beam is focused by the second lens 170 and is incident on the light receiver 120. ) Converts the amount of rainwater into an electrical signal, and the amount of rainwater detection signal converted into the electrical signal is input to the controller.

Then, the controller generates a wiper drive control signal using the amount of rain detection signal, and the wiper drive control signal is output to the wiper drive motor to control the operating speed of the wiper.

The rain sensor system requires a plurality of reflecting parts for reflecting light and a lens for condensing light in order to widen the measurement range and improve detection performance, and a manufacturing cost increases because a complicated structure for combining them is required. In addition, there is a difficulty that the manufacturing process is complicated.

In addition, it is difficult to accurately and quickly detect the amount of rain due to light disturbance variables such as moisture, frost, etc. when reflected from the windshield of the vehicle is incident to the light receiving portion, there is a need for a solution.

In addition, the rain sensor detects only rainwater from the outside, and cannot detect indoor conditions of the vehicle, such as unauthorized intrusion, theft, overheating, and leaving the vehicle of an infant or pet, which is one device in the rain sensor module. The need for a sensor to enable this is emerging.

The present invention has been made to solve the problems of the contrast technology as described above, the present invention is a rain sensor that can detect unauthorized intrusion, item theft, excessive temperature rise, leaving the vehicle of infants or pets with only one rain sensor module. The purpose is to provide.

In addition, an object of the present invention is to refracting and reflecting the infrared beam by using the lower infrared total use prism and the upper rain prism detection prism and to receive the infrared beam re-reflected from the windshield of the vehicle again through the infrared filter and prism. It is to provide a rain sensor that allows.

Another object is to allow the light receiving portion and the light emitting portion to be received inside the groove formed by opening a part of the center of one side end of the prism so that raindrops can be accurately measured regardless of the back light emission or the front light emission, and the light receiving part and the light emitting part are opposite to each other. As it is arranged to minimize the size of the entire substrate and the rain sensor.

In addition, an object of the present invention is to provide a rain sensor having a prism that can be integrally manufactured on the upper horizontal surface of the prism without separately manufacturing an infrared filter attached to the windshield of the vehicle.

The configuration of the present invention for achieving the above object is provided in the front glass side of the vehicle, in the rain sensor having a light emitting portion and the light receiving portion, the light emitting portion and the light receiving portion to face the opposite side of the substrate And a prism formed to accommodate the light emitting part and the light receiving part, and including a prism having a plurality of surfaces to reflect or refract light emitted from the light emitting part in multiple stages. The emitted light is reflected or refracted by a plurality of surfaces of the prism is incident to the light-receiving unit, and the indoor side of the substrate further comprises a sensor to detect the indoor sensor combined rain sensor, characterized in that for detecting the change in the room to provide.

A plurality of surfaces of the prism is characterized in that it comprises a top horizontal surface, side surface, the bottom horizontal surface.

The plurality of surfaces of the prism may include an upper surface of the groove, a first inclined surface, an upper horizontal surface, a second inclined surface, a side surface, a third inclined surface, a lower horizontal surface, a fourth inclined surface, and a lower surface of the groove. A first inclined surface is provided between the top surface of the groove and the top horizontal surface, the first inclined surface is provided between the top surface of the groove and the top horizontal surface, the second inclined surface is the top horizontal surface and the side surface It is provided between the, the third inclined surface is provided between the side surface and the lower horizontal surface, the fourth inclined surface is characterized in that provided between the lower horizontal surface and the lower surface of the groove.

The prism is characterized in that it is bonded to the raindrop detection prism on the lower side and the infrared prism used on the upper side.

The light emitting unit may be positioned to face the windshield of the vehicle on an upper portion of the substrate, or be positioned below the substrate.

It further comprises a filter unit formed integrally with the upper horizontal surface of the prism.

And a filter unit attached and fixed between the upper horizontal surface of the prism and the windshield of the vehicle.

The filter unit is in close contact with the adhesive member, and the adhesive member is characterized in that it comprises a silicon material.

The relative position of the light emitting portion and the light receiving portion on the substrate is determined by the inclination of each inclined surface of the prism and the refractive index in the horizontal plane.

The light emitting part is provided above the substrate, and the light receiving part is provided below the substrate, and the light emitted from the light emitting part is incident on an upper end surface of the groove of the prism, and is reflected from the first inclined surface. Light incident from the upper horizontal plane to the glass side and reflected back from the glass side is sequentially reflected from the second inclined plane, the side surface, the second inclined plane, the lower horizontal plane and the fourth inclined plane through the upper horizontal plane, The light is output from the bottom surface of the groove and input to the light receiving portion, or the light emitting portion is provided below the substrate, the light receiving portion is provided above the substrate, the light emitted from the light emitting portion is the bottom surface of the groove of the prism Incident on the fourth inclined plane, the lower horizontal plane, the third inclined plane, the side surface, and the second inclined plane The light incident on the glass side from the upper horizontal plane and reflected back from the glass side is reflected on the first inclined plane through the upper horizontal plane and output to the upper end surface of the groove to enter the light receiving unit.

The detection sensor is characterized in that it comprises a light emitting unit and a light receiving unit.

The prism is provided with an infrared filter, and the light-emitting and light-receiving paths of the detection sensor pass through the position provided with the infrared filter.

The detection sensor is characterized in that the ultrasonic sensor.

The detection sensor is characterized in that the thermal sensor.

The detection sensor is characterized in that the carbon dioxide detection sensor.

The present invention enables to detect changes in the indoor motion, temperature, carbon dioxide, etc. in the rain sensor module, to prevent unauthorized intrusion in the vehicle, theft of the object, fire, abnormal overheating, the indoor neglect of infants or pets. And, this effect has the effect that can be performed through one rain sensor module.

In addition, the light receiving portion and the light emitting portion are accommodated inside the groove formed by opening a part of the center of one side end of the lower infrared total prism on the lower side and the upper raindrop detecting prism on the upper side, and the light receiving portion and the light emitting portion are disposed to face opposite sides of the substrate. By using the prism to be able to bend the path of light 180 degrees has the effect of making the size of the entire substrate or the rain sensor small or compact.

In addition, the present invention simplifies the manufacturing process by integrally manufacturing on the top horizontal surface of the prism without separately manufacturing an infrared filter attached to the windshield of the vehicle with a simple structure, and the moisture, frost or infrared beam, which is unnecessary for infrared detection, The effect is to block the other beams so that the amount of rain can be accurately detected.

Hereinafter, with reference to the embodiments of the accompanying drawings, the configuration of the present invention will be described in detail.

First, in order to describe the general operation of the rain sensor, referring to FIG. 2 of the contrast technology described above, the rain sensor 100 is one or more light emitting unit 110, the light emitting unit 110 provided toward the lower side of the substrate 180. ) Facing the light emitting unit 110 facing the first reflection portion 130 provided upward, the second reflection portion 140, the second reflection portion 140 disposed upward at a vertical direction or a predetermined angle to the side ) The first lens 160 disposed in the light path between the glass 150, the light receiving unit 120 disposed on the upper surface of the PCB substrate 180, and the light path between the light receiving unit 120 and the glass 150. The second lens 160 is disposed in the second lens 160. Let's compare this contrast with the present invention.

3 is a view for explaining the configuration of the rain sensor according to the present invention and the operation of the rain sensor according to the present invention, Figure 4 is provided with the position of the light emitting portion and the light receiving portion of the rain sensor shown in FIG. A diagram for describing a configuration of a rain sensor according to the present invention and a method of operating a rain sensor.

Referring to FIG. 3, the rain sensor 500 of the present invention is provided to face opposite sides of the light emitting unit 110, the light emitting unit 110, and the PCB substrate 180 provided toward the upper side of the substrate 180. The light receiving unit 120, a groove 695 having an upper surface and a lower surface is formed on one side, and the PCB substrate 180 is horizontally inserted between the upper surface and the lower surface of the groove to emit light 110 therein. And a filter unit 300 provided between the prism 600 accommodating the light receiving unit 120 and the prism 600 and the windshield 150 of the vehicle to transmit light incident from the windshield 150 of the vehicle. It is configured by.

The light emitting unit 110 generally uses an infrared LED, and is installed on the upper side of the PCB substrate 180 toward the front glass 150 side of the vehicle, or on the lower side of the PCB substrate 180. It may be.

The light receiving unit 120 generally uses a photosensor and is installed toward the opposite side of the light emitting unit 110 and the PCB substrate 180 according to the position where the light emitting unit 110 is installed.

The prism 600 may allow the top surface 680 of the prism groove for refracting the infrared beam radiated upward by the light emitting unit 110 and the refracted infrared beam to be incident obliquely toward the vehicle windshield 150. The first inclined surface 610 to reflect, the top horizontal surface 620 having a planar shape, and the infrared beam reflected from the vehicle windshield 150 are easily received so as to be easily attached to the vehicle windshield 150 by the adhesive member 400. The second inclined plane 630, the side surface 640, the third inclined plane 650, the lower horizontal plane 660, the fourth inclined plane 670, and the fourth inclined plane 670 are reflected to be incident to the 120. When the infrared beam reflected from the incident to the light receiving unit 120 is made of the bottom surface 690 of the prism groove that is refracted.

The upper surface 680 of the prism groove is a portion where the light emitted from the light emitting unit 110 first reaches, and the light directed toward the windshield 150 of the vehicle may be refracted.

In some cases, when the light of the light emitting unit 110 is incident vertically, the light may not be bent.

A first inclined surface 610 may be included to allow the refracted light to be incident obliquely toward the windshield 150 side of the vehicle.

The first inclined surface 610 is formed in a direction inclined upward by a predetermined angle and serves to reflect the light refracted by the upper surface 680 of the prism groove toward the front glass 150 of the vehicle. The inclination angle of the first inclined surface 610 is determined according to the angle of light incident on the upper horizontal surface 620.

The upper horizontal plane 620 is refracted when the light reflected from the first inclined plane 610 is incident on the vehicle windshield 150. Since the angle of light is set differently according to the characteristics of the medium, the law of refraction Design accordingly.

The law of refraction (SNELL'S LAW) will be described with reference to the drawing of FIG. 3. When the light a reflected from the windshield of the vehicle is incident from the medium 1 having the refractive index n1 to the medium having the refractive index n2, The ratio of sine values is always constant, which is the refractive index of medium 2 to medium 1.

That is, n1 sinθ1 = n2 sinθ2 can be expressed as a formula, and through this, the shape design and the position of the light emitting part and the light receiving part can be adjusted according to the type, shape, characteristics and path of the light as well as the light path and the light emission angle. Done. In addition, the shape design of the prism can be variously adjusted according to the detection target range and position.

The infrared beam reflected from the first inclined surface 610 toward the windshield 150 side of the vehicle is refracted while passing through the upper horizontal plane 620, and reflected from the windshield 150 side, and then back to the upper horizontal plane 620. Is entered.

In this case, the filter unit may be further provided between the upper horizontal surface 620 and the windshield 150 of the vehicle. The refracted and reflected infrared beam is emitted through the filter unit 300 and is incident on the vehicle windshield 150.

The infrared beam incident on the windshield 150 of the vehicle is reflected by the windshield 150 of the vehicle, and the reflected infrared beam is filtered through the filter unit 300 and is incident to the prism 600.

The filter unit 300 is preferably an infrared filter, and transmits only the infrared beam in the light incident from the windshield 150 of the vehicle to block unnecessary variables for infrared detection.

The filter unit 300 is provided between the upper horizontal plane 620 and the windshield 150 of the vehicle. The filter unit 300 may be separately inserted or integrally formed in the prism.

An adhesive member 400 may be used above and / or below the filter unit 300. When an infrared beam is incident from the prism 600 to the windshield 150 of the vehicle or from the windshield 150 of the vehicle to the prism 600, the prism 600 and the vehicle are reduced in order to reduce the error in the refractive index. It is preferable to use silicon as the adhesive member 400 when installed between the windshield 150. Although the thickness of the adhesive member and the filter is shown in the drawings to some extent, it is preferable to minimize the thickness of the light to prevent unnecessary refraction.

The light reflected from the windshield of the vehicle is reflected while passing through the second inclined surface 630, the side surface 640, the third inclined surface 650, the lower horizontal surface 660, and the fourth inclined surface 670. Enter In some cases, the light reflected from the right side surface and the bottom horizontal surface without the second, third, and fourth inclined surfaces 630, 650, 670 may be directly input to the light receiver 120.

The reflected light is output from the bottom surface 690 of the final groove and input to the light receiver 120.

The lower surface 690 of the prism groove may be refracted before the infrared beam reflected from the fourth inclined surface 670 is incident on the light receiver 120.

The prism 600 may be separated into a lower infrared total use prism and an upper raindrop detection prism.

Each of the upper side and the lower side is formed with a groove, and each groove is provided with an upper end surface 280 of the groove and a lower end surface 290 of the groove. Light is incident, input or radiated, and output through the top surface 280 and the bottom surface 290 of the groove to the prism.

A portion of the substrate 180 is inserted into the groove 695, and the light emitting portion 110 and the light receiving portion 120 are positioned in the portion thereof, thereby making the space compact as a whole.

The substrate 180 is a PCB to which the light emitting unit 110 and the light receiving unit 120 are attached to both sides.

The rain sensor 600 illustrated in FIG. 4 has a light emitting part 110 provided at a lower portion of the PCB substrate 180 toward the lower horizontal surface 690 of the prism, and opposite sides of the light emitting part 110 and the PCB substrate 180. It consists of a light receiving unit 120 provided to face.

 A fourth inclined surface 670 reflecting the lower surface 690 of the prism groove that is straight or refracted when the light is incident from the light emitting unit 110 to the prism positioned downward and the refracted light toward the lower horizontal plane of the prism; The light reflected from the lower horizontal surface 690 and the lower horizontal surface 690 to reflect the light reflected from the fourth inclined surface 670 upwards toward the windshield 150 of the vehicle is incident on the windshield 150 of the vehicle. A third inclined surface 650 for reflecting forms a lower infrared total use prism.

When the light reflected from the side surface 640, the second inclined surface 630, and the second inclined surface 630 is incident on the windshield 150 of the vehicle, the light is refracted when the light is incident on the prism from the windshield 150 of the vehicle. The first horizontal surface 280, the filter unit 300 transmitting only the infrared beam from the windshield 150 of the vehicle, and the first inclined surface reflecting the light incident from the windshield 150 of the vehicle toward the light receiving unit 120. 610 and an upper surface 680 of the prism groove in which the light reflected from the first inclined surface 610 is straight or refracted when the light is incident on the light receiver 120.

In the present invention, there is an advantage that the manufacturing process of the rain sensor can be simplified by manufacturing an infrared filter and a prism integrally that a plurality of lenses have been conventionally used to accurately and quickly detect the amount of rain through an infrared beam. .

Further, the present invention accommodates the light receiving portion and the light emitting portion inside the groove formed by opening a part of the center of one side end of the lower infrared total use prism and the upper raindrop detection prism on the upper side, and the light receiving portion and the light emitting portion are disposed to face the opposite side of the substrate Instead, by using the prism to bend the light path 180 degrees, the size of the substrate or the entire rain sensor can be reduced or compact.

Referring to FIG. 3, when the wiper automatic operation mode is selected according to the driver's operation in rainy weather, the controller controls the light emitting unit 110 to periodically emit light in the drawing.

When the light emitter 110 emits light in response to a light emission control signal of the controller, an infrared beam is emitted, and the infrared beam is incident on the prism 600 positioned upward. In this case, the incident surface of the light emitted from the light emitting unit becomes the top surface 680 of the prism groove.

The infrared beam incident on the top surface 680 of the prism groove is straight or refracted at the top surface 680 of the groove of the prism, the infrared beam is reflected on the first inclined surface 610, and the reflected infrared beam is As it is output to the upper horizontal plane 620, the light passes through the filter unit 300 and is incident to the windshield 150 of the vehicle.

The filter unit 300 blocks moisture, frost, or other beams other than the infrared beam and transmits only the infrared beam.

The infrared beam reflected from the windshield 150 of the vehicle is again inputted into the prism 600 through the upper horizontal plane 680, reflected from the second inclined plane 630, and sequentially side surfaces 640 and third. Reflected while passing through the inclined surface 650, the lower horizontal surface 660, and the fourth inclined surface 670, the reflected infrared beam is output through the lower surface 690 of the prism groove and is incident on the light receiver 120.

4 is opposite to the positions of the light emitting unit 110 and the light receiving unit 120 in FIG. 3, the light receiving unit 120 is installed on the upper surface of the PCB substrate 180 toward the front glass 150 side of the vehicle and the light emitting unit 110 is installed. ) Is a view installed below the substrate 180 to face downward.

When the light emitter 110 emits light in response to a light emission control signal of the controller, an infrared beam is emitted, and the infrared beam is incident to the prism 600 positioned below. In this case, the incident surface of the light emitted from the light emitting unit becomes the bottom surface 690 of the prism groove.

The infrared beam incident on the bottom surface 690 of the prism groove is straight or refracted at the bottom surface 690 of the prism groove, and the infrared beam is reflected on the fourth inclined surface 670.

 The reflected infrared beam is reflected while passing through the lower horizontal plane 660, the third inclined plane 650, the side surface 640, and the second inclined plane 630, and the reflected infrared beam is output to the upper horizontal plane 620. Passes through the portion 300 is incident to the windshield 150 of the vehicle.

The filter unit 300 blocks moisture, frost, or other beams other than the infrared beam and transmits only the infrared beam.

The infrared beam reflected from the windshield 150 of the vehicle is input back into the prism through the upper horizontal plane 620, and the infrared beam reflected and reflected from the first inclined plane 610 passes through the upper surface 610 of the prism groove. It is output through the light incident to the light receiving unit 120.

3 and 4 illustrate a rain sensor in which the filter unit 300 is separately inserted between the upper horizontal surface 620 of the prism and the windshield 150 of the vehicle. In FIG. 5, the filter unit 300 is the upper end of the prism. There is a difference that the rain sensor is integrally formed on the horizontal surface 620 and attached to and fixed by the adhesive member 400 to the windshield 150 of the vehicle.

Since the configuration and operation of the other rain sensor is the same as described in Figures 3 and 4 will be omitted here.

6 is a view showing a rain sensor of another embodiment according to the present invention. Referring to FIG. 6, the substrate 180 is provided with various kinds of sensors 700 toward the interior side. As shown in the drawing, the light emitting unit 710 and the light receiving unit 720 are provided, and the infrared light emitted from the light emitting unit 710 to the interior side is emitted through the filter 800, and then is reflected at a predetermined position. Through the input process, the room is detected. If light is not input to the light receiver 720 in a state where the vehicle is empty, an alarm may be generated as an unauthorized intrusion. The infrared filter 800 increases the detection efficiency of the light emitter 710 and the light receiver 720.

Meanwhile, various types of sensors may be employed as the detection sensor 700, and the indoor movement may be detected through an ultrasonic sensor or the carbon dioxide increase may be measured through a carbon dioxide sensor. In particular, in the case of a carbon dioxide sensor, when a child or a pet is accidentally left in the car, the carbon dioxide is rapidly detected and an alarm can be generated to prevent an asphyxiation accident. do. In addition, through the temperature sensor, it is possible to detect and warn the excessive increase in the temperature of the vehicle. These sensors are available for one or more optional applications.

What has been described above is just one embodiment for implementing the rain sensor according to the present invention, the present invention is not limited to the above-described embodiment, and the scope of the present invention as claimed in the claims below Without this, anyone skilled in the art to which the present invention pertains will have the technical spirit of the present invention to the extent that various modifications can be made.

1 is a view for explaining a general rain sensor.

FIG. 2 is a diagram for describing a method of operating another rain sensor.

3 is an enlarged view for explaining the configuration of the rain sensor according to the present invention.

4 is a view for explaining the configuration when the position of the light emitting unit and the light receiving unit in the rain sensor according to the present invention shown in FIG.

5 is a view showing a rain sensor of another embodiment according to the present invention.

6 is a view showing a rain sensor of another embodiment according to the present invention.

** Explanation of symbols for main parts of drawings **

11: Rain sensor unit 12: Wiper drive motor

50: rain sensor 110: light emitting unit

120: light receiver 150: windshield of the vehicle

180: PCB 300: filter

400: adhesive member 500: rain sensor

600: prism 610: first slope

620: upper horizontal plane 630: second inclined plane

640: side surface of the prism 650: third slope

660: lower horizontal plane 670: fourth inclined plane

680: top surface of the prism groove 690: bottom surface of the prism groove

695: groove of prism 700: detection sensor

710: light emitting unit 720: light receiving unit

800: filter

Claims (8)

In the rain sensor provided on the front glass side of the vehicle, the light sensor and the light receiving unit, The light emitting portion and the light receiving portion are provided to face opposite sides of the substrate, And a groove formed to accommodate the light emitting portion and the light receiving portion, and a plurality of surfaces formed to reflect or refract light emitted from the light emitting portion in multiple stages. The light emitted from the light emitter is reflected or refracted by a plurality of surfaces of the prism to be incident to the light receiver, Indoor sensor combined rain sensor, characterized in that the indoor side of the substrate is further provided to detect a change in the room. The method of claim 1, A plurality of faces of the prism, Indoor sensor combined rain sensor comprising a top horizontal surface, side, bottom horizontal surface. The method of claim 1, The plurality of surfaces of the prism are configured to include an upper surface of the groove, a first inclined surface, an upper horizontal surface, a second inclined surface, a side surface, a third inclined surface, a lower horizontal surface, a fourth inclined surface, and a lower surface of the groove, The first inclined surface is provided between the top surface of the groove and the top horizontal surface, The first inclined surface is provided between the top surface of the groove and the top horizontal surface, The second inclined surface is provided between the upper horizontal surface and the side surface, The third inclined surface is provided between the side surface and the lower horizontal surface, And the fourth inclined surface is disposed between the lower horizontal surface and the lower surface of the groove. The method according to any one of claims 1 to 3, The indoor sensor combined rain sensor, characterized in that the sensor comprises a light emitting unit and a light receiving unit. The method of claim 4, wherein The prism is provided with an infrared filter, The indoor sensor combined rain sensor, characterized in that the light emitting and receiving path of the sensor passes through the position provided with the infrared filter. The method according to any one of claims 1 to 3, The indoor sensor combined rain sensor, characterized in that the detection sensor is an ultrasonic sensor. The method according to any one of claims 1 to 3, The indoor sensor combined rain sensor, characterized in that the detection sensor is a thermal sensor. The method according to any one of claims 1 to 3, The indoor sensor combined rain sensor, characterized in that the detection sensor is a carbon dioxide detection sensor.

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