JPH02293688A - Rain sensor and rainfall announcing device and rainproof system - Google Patents

Abstract

PURPOSE:To obtain a relatively simple and inexpensive rain sensor by having a pair of electrodes which are changed in electrical characteristics between the same when the electrodes are electrically coupled via the rain drops, etc., sticking thereto. CONSTITUTION:The branch electrodes TB 1 and TB 2 are electrically coupled via the rain drops RD, etc., when rains, etc., begin to fall and the rain drops RD, etc., stick to the surface of the rain sensor. The resistance value between the electrodes T 1 and T 2 viewed from lead wires L 1 and L 2 are, therefore, dropped to about several 100KOMEGA. Namely, a detecting section provided to the rainfall announcing device, etc., monitors the change in the value of the current passed between the lead wires L 1 and L 2, i.e. the electrodes T 1 and T 2. The beginning of the rainfall is thereby easily identified.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a rain sensor, a rain alarm, and a rainproof system, and is applicable to household or industrial laundry equipment or its management means. It concerns particularly effective techniques.

[Means to solve the problem]

A brief overview of typical inventions disclosed in this application is as follows.

That is, for example, at least a pair of electric rods formed on the same plane and having a plurality of comb-shaped branch electrodes facing each other at a predetermined distance, or, for example, one or both of the electric rods is formed in a net shape and a net-shaped insulator is sandwiched therebetween. A rain sensor is constructed based on at least one pair of electrodes facing each other. Then, by identifying changes in the electrical characteristics between these electric wires when they are electrically coupled through adhering rainwater, etc., we can create a rain alarm system that detects and alerts you to rain or its onset. and a rainproof system that automatically takes in dried fish or takes rainproof measures. [Function] According to the above-described means, a simple and inexpensive rain sensor can be realized relatively easily. In addition, the rainfall alarm system allows you to know when it starts to fall, allowing you to take in dried fish before they get too wet. Furthermore, the rainproof system automatically takes in dried fish, so it is possible to put out dried fish with peace of mind, especially in households with two income earners. [Example] 1. Rain Sensor (First Embodiment) FIG. 1 shows a plan view of a first embodiment of a rain sensor to which the present invention is applied, and FIG. 2 shows a sectional view taken along line AA'. ing.

In FIG. 1, the rain sensor includes, but is not particularly limited to, a pair of electrodes T1 and T2 formed on a substrate P.
These electrodes each have a large number of comb-shaped electrodes TBI and TB2 which are formed in a comb shape at a predetermined pitch and face each other with a predetermined distance between each pitch, although these electrodes are not particularly limited. In this embodiment, the substrate P is made of an insulating material with high weather resistance, such as polymer resin. In addition, electrodes T1 and T2 and branch electrode TBI
and TB2 are similarly made of a highly weather resistant conductive material, and are formed with high precision using printed circuit board technology used in electronic equipment, for example. Although not particularly limited, the electrode T
One end of L1 and T2 is drawn out as a lead wire L1 or L2, and is coupled to a detection unit such as a rain alarm. Rain sensors are placed outdoors, for example, along with dried items such as laundry and bedding. When it is not raining (including snow, hail, etc.) and the surface of the substrate P and each electrode are dry, the electrodes TI and T2 are in an insulating state, and for example, the electrodes seen from the lead wires Ll and L2 The resistance value between TI and T2 is almost infinite. However, when it starts to rain and rainwater RD etc. adheres to the surface of the rain sensor as illustrated in FIG. 1, the branches 1iiTB1 and TB2 are electrically coupled via the rainwater RD etc. Therefore, the resistance value between the electrodes TI and T2 as seen from the lead wires L1 and L2 decreases to, for example, about several hundred kilohms. In other words, the detection unit installed in a rain alarm etc. monitors the change in the resistance value between the lead wires Ll and L2, that is, between the electrodes T1 and T2, in other words, the change in the current value flowing between the electric wires Tl and T2. You can easily tell that it has started raining. By the way, in this example, the branch electrodes TBI and TB
The pitch at which the raindrops are formed and their opposing distances determine the size of the raindrops that can be identified, that is, the sensitivity of the rain sensor. That is, when the pitch of the branch electrodes TBI and TB2 and the distance between them facing each other are relatively large, the size of distinguishable raindrops increases proportionally, and the sensitivity of the rain sensor decreases. On the other hand, when the pitch of the branch electrodes TBI and TB2 and the distance between them facing each other are relatively small, the size of distinguishable raindrops becomes proportionally small, and the sensitivity of the rain sensor improves. Needless to say, the surface area of the substrate P, in other words, the total length of the distance that the branch electrodes BTI and BT2 face each other affects the sensitivity of the rain sensor in the form of the probability that rainwater or the like will adhere to it. Incidentally, the detection section of the rain alarm can also identify rain or its onset based on changes in other electrical characteristics between the electrodes T1 and T2, such as capacitance. 2. Rain sensor (second embodiment) Fig. 3 shows a second embodiment of a rain sensor to which this invention is applied.
A plan view of the example is shown, and FIG. 4 shows its BB' cross-sectional view. In FIG. 3, the rain sensor of this embodiment includes, although not particularly limited to, a pair of mesh-shaped electrodes Tl and T2 fixed by a holding frame HG. Between these electrodes, although not particularly limited, as shown in FIG. 4, an insulating net IN, which is also in the form of a net, is provided. In this embodiment, the holding frame HG and the insulation network IN are made of an insulating material with high weather resistance. Also, the electrodes TI and T
2 is similarly made of a highly weather resistant conductive material,
For example, it is fixed to the holding frame HG using a known molding technique. Although not particularly limited, the electrodes T1 and T2 are coupled at one side to the lead wires L1 and L2, respectively, and further coupled to a detection unit such as a rain alarm. Rain sensors are placed outdoors, for example, along with dried items such as laundry and bedding. When it is not raining and rainwater etc. does not adhere between the electrodes T1 and T2, the electrodes Tl and T2 are in an insulated state, and the resistance value between the electrodes T1 and T2 as seen from the lead wires Ll and L2 is almost infinite. Become. However, when it starts to rain and rain water RD etc. adheres to the electrodes TI and T2 as illustrated in FIG. 4, these electrodes are electrically coupled via the rain water RD etc. Therefore, the resistance value between the electrodes TL and 1''2 as seen from the lead wires Ll and L2 decreases to, for example, several LOOKΩ (kiloohms). By monitoring the change in the resistance value between T and L2, that is, between the electrodes TI and T2, in other words, the change in the current value flowing between the electrodes Tl and T2, it is possible to easily identify that it has started to rain. In this embodiment, rainwater, etc. that falls on the rain sensor further tries to fall through the net-like electric poles T1 and T2 and the insulation network IN. The size and the facing distance of these electrodes and the insulation network determine the size of the raindrops that can be identified and thus the sensitivity of the rain sensor, i.e.
When the meshes of the electrodes TI and T2 and the insulating network IN and their opposing distances are relatively large, the size of discernible raindrops becomes proportionally thicker (and the sensitivity of the rain sensor decreases).
On the other hand, when the meshes of the electrodes Tl and T2 and the insulating network IN and the opposing distances thereof are relatively small, the size of discernible raindrops becomes proportionally smaller, and the sensitivity of the rain sensor improves. Needless to say, the areas of the electric poles T1 and T2 and the insulation network IN affect the sensitivity of the rain sensor in the form of the probability that rainwater will arrive. In this embodiment, both the electrodes J4Tl and T2 are constructed of mesh-shaped electrodes, but the lower electrode T2 may be constructed of a plate-shaped electrode, for example. 3. Rainfall axis sensor H (first embodiment) Figures 5 and 6 show a plan view and a side view, respectively, of a first embodiment of a rain alarm to which this invention is applied. , FIG. 7 shows a functional block diagram of an embodiment of the rain alarm shown in FIGS. 5 and 6. In FIG. , the basic configuration is a rain sensor RS that occupies a relatively large part of the facepiece (case) BX.This rain sensor RS has no particular restrictions, but the rain sensor RS shown in FIGS. Either of the rain sensors shown in Fig. and !@4 is used, and its lead wires L1 and L2 are connected to the detection part R of the electronic circuit part EC as shown in Fig.
Connected to the input terminal of D. Although not particularly limited, the rainfall alarm further includes two dry batteries BAT disposed inside the box BX, and an operating part MP and a subwoofer sp fixed to one side of the box BX. A back cover BC is provided below the dry battery BAT. In other words, in the rain alarm of this embodiment,
All the components and circuit blocks constituting it are arranged in a common box BX, and have a shape that allows for easy movement. A predetermined waterproofing treatment is applied to the box BX and each component and circuit block.

In FIG. 7, the detection unit RD is further supplied with a predetermined power control signal, a test control signal, a reset control signal, etc. from the operation unit MP, although not particularly limited thereto, and is supplied with a predetermined DC voltage from the dry battery BAT. Ru. The operation unit MP includes, but is not particularly limited to, three switches, namely a power switch, a test switch, and a reset switch. Among these, the power switch is opened and closed to selectively activate the rain alarm. Further, the test switch is opened and closed to confirm the alarm function when the rain alarm is put into operation, and the reset switch is opened and closed to stop the above-mentioned confirmation operation. The operating section MP converts the open/close state of the switch into an electrical signal and supplies it to the detection section RD as the power control signal, test control signal, and reset control signal. The detection unit RD is selectively brought into operation when the power supply control signal is validated. In this operating state,
The detection unit RD monitors the resistance value between the lead wires L1 and L2 of the rain sensor RS, that is, between the electrodes Tl and T2. Then, when the resistance value is almost infinite, the output signal is invalidated, and when the resistance value 1 becomes less than a predetermined value, it is validated. Furthermore, when the test control signal is validated, the detection unit 1f) forcibly makes the output signal valid regardless of the resistance value between the electric currents iTl and T2, and the reset control signal It also has a test function that disables it when it is enabled. As a result, users of the rain alarm can easily confirm that the power supply and alarm function are working properly. The output signal of the detection section RD is supplied to the input terminal of the speaker drive section SD. The speaker drive unit SD is further supplied with the DC voltage from the dry battery BAT. Although not particularly limited, the speaker drive section SD has a basic configuration of a signal generation circuit that generates a predetermined oscillation signal, and together with the speaker SP constitutes the notification section of the rain sensor. The signal generating circuit of the beaker drive unit SD is selectively activated when the output signal of the detection unit RD is validated, and forms the oscillation signal. Although not particularly limited, these firing signals are supplied to the speaker SP via the amplifier circuit of the speaker drive unit SD, and become a predetermined electronic sound. As described above, in the rain alarm of this embodiment, the rain sensor RS, other parts, and circuit blocks are housed in a common case BX that can be easily moved, and the DC voltage supplied by the dry cell battery BAT is used as the operating power source. Suppose that Rainfall alarms are placed outdoors, along with laundry, bedding, and other dry goods, to identify rain or its onset, and notify the user with a predetermined electronic sound. As a result, the family member who is at home can quickly learn that it has started raining while doing other work indoors, and can catch the rain before the dried food gets too wet.

4. Rain Alarm (Second Embodiment) FIG. 8 shows a functional block diagram of a second embodiment of a rain alarm to which the present invention is applied.

In the same figure, rain sensor RS. Operation unit MP, detection IRD
．． The speaker drive section SD and the speaker SP have substantially the same functions as the corresponding circuit blocks of the rainfall axis detector shown in FIG. 7 above. Below, explanations will be added only for the parts that are different from the rain alarm shown in Figure 7 above. In FIG. 8, the rain alarm system is equipped with a power source pow instead of the dry battery BAT. Although not particularly limited, this power supply section pow receives a household AC voltage ACIOOV and generates a predetermined DC voltage corresponding to the output pressure of the dry battery BAT. In this example, the rain sensor RS is
It is stored in an independent box (case) BXI, and is fixed outdoors where dry items such as laundry and futons are placed, although there are no particular restrictions. On the other hand, the operation section MP, detection section RD, speaker drive section SD, speaker SP, power supply section POW, etc. are housed in a separate box BX2 and fixed indoors. The lead wires L1 and L2 of the rain sensor RS are connected to the input terminal of the detection unit RD after being routed over a relatively long distance. For these reasons, users of rain alarms should use rain sensor R.
There is no need to take the S or the rain alarm unit outside, and there is no need to replace the battery. Furthermore, since the signal sound emitted by the rain alarm can be heard indoors, there is less risk of missing the signal. 5. Rainproof System (First Embodiment) FIG. 9 and FIG. In FIG. 9, the clothes drying facility is installed under the eaves of the roof RF of a house, although it is not particularly limited. Clothes drying equipment is not particularly limited, but each pillar P installed outdoors
The basic configuration is a pair of structures including a column P2 provided along the wall of a house, and a slider SL provided as a beam between these columns. These structures are connected by, but not limited to, crossbeams, not shown.
Reinforced. A plurality of clothesline rods DP are passed over the pair of sliders SL, and dried articles (objects to be protected) Do, such as laundry or futons, are hung thereon.

Among the plurality of clotheslines DP, the outermost clothesline DP is connected to one end of a wire W, and the other clotheslines DP are skewered via this wire W. The other end of the wire W is
It is coupled to the wire winding WWW via the wire pulley WR.

The wire winding Hww constitutes the rainproof mechanism of this clothes drying equipment together with the wire W and the clothesline DP, and includes, but is not particularly limited to, a winch for winding up the wire W, a winch drive unit, a rain detection unit, and the like. Including power supply section, etc. Among these, the input terminal of the rain detection section is connected to the rain sensor RS fixed to the upper part of the pillar P1 via a coupling wiring (not shown).
and its output terminal is coupled to the winch drive. In this embodiment, the rain sensor RS may be one of the rain sensors shown in FIGS. 1 and 2 or 3 and 4, although not particularly limited thereto. Although not particularly limited, the rain detection section monitors the electrical characteristics, such as the resistance value, between the lead wires L1 and L2 of the rain sensor RS, detects rain or its onset, and selectively enables its output signal. Suppose that The winch drive unit, when the output signal of the rain detection unit is validated,
Selectively drive the winch. In this embodiment, at the eaves of the roof RF, although not particularly limited, there is provided a waterproof sheet ■S that has been wound up in advance on a sheet roll SR, and a weight WG is provided at the lower end of the waterproof sheet VS. It will be done. When the output signal of the rain detection section is validated, the pair of clasps of the weight WG are selectively removed and the weight WG is dropped downward.

When it is not raining, the plurality of clothes-drying poles DP are pulled outside (outside the rainproof area) by the household members, and the dried clothes DO are hung there to dry. When rain or the like begins to fall and is detected by the rain sensor RS, the output signal of the rain detection section is validated.

For this reason, first, the winch of the wire winding HWW is automatically moved differentially, and the plurality of clothesline poles DP are taken under the eaves (within the rainproof area) as shown in Fig. lθ. Then, the clasp of the weight WG is automatically removed, and the waterproof sheet}V
S is lowered to the eaves. This allows the dried fish DO to be stored without getting too wet from the rain. As described above, the rainproof system of this embodiment, that is, the clothes drying equipment, includes a rain sensor RS and a rain detection unit that detect rain or its onset, and a plurality of clothes drying poles DP under the eaves according to the output signal of the rain detection unit. Wire winding word W for taking in
Equipped with W. Dried fish left to dry outside in anticipation of good weather is automatically brought under the eaves and covered with a waterproof sheet when the rain sensor RS detects rain. As a result, especially in dual-earner households where no one is home during the day, dried fish can be safely taken outside without worrying about sudden rain.

6. Rainproof System (Second Embodiment) Figures 11 and 12 show structural diagrams of a second embodiment of a rainproof system, ie, a clothes drying facility, to which this invention is applied. In FIG. 11, the clothes drying equipment is not particularly limited, but
The structure is built independently outdoors, and has a basic structure consisting of a pair of pillars 1 and 2, respectively, and beams Gl and G2, which are provided in two steps between these pillars. Although not particularly limited, these structures are connected and reinforced by bridge girders (not shown). A foldable shafter SH (movable roof) is provided above the pair of beams c1 provided in the upper stage, and a rain sensor RS is fixed to the lower side thereof. In this embodiment, the rain sensor RS may be one of the rain sensors shown in FIGS. 1 and 2 or 3 and 4, although not particularly limited thereto. One end of the shutter SH is fixed to a beam G1 at the right end in the figure, and the other end is connected to a wire winder WW via a pair of wires W. A pair of beams G installed at the bottom
A plurality of clothesline poles DP are passed over the clothesline 2, and dried articles (objects to be protected) DO, such as laundry or futons, are hung on these. A wire winder WW is further provided at the top of the beam G2. Like the embodiments shown in FIGS. 9 and 10, this wire winder WW includes a winch for winding the wire, a winch drive unit, a rain detection unit, etc., and together with the shank SH etc., the wire winder WW is rainproof. Configure the mechanism. When it is not raining, the shutter SH is opened to one end as shown in FIG. 11, and the dried fish Do are hung on the plurality of drying poles DP by the householders. When rain or the like begins to fall and is detected by the rain sensor RS, the winch of the wire winding arm WW is automatically differentially moved, and the shutter SH is closed, as shown in FIG. 10.

As a result, the dried fish DO is protected under the shutter SH along with the rainy season RS.

As shown in the plurality of embodiments described above, by applying the present invention to rain sensors, rain alarms, and rainproof systems, the following effects can be obtained. That is, for example, at least a pair of electrodes formed on the same plane and having a plurality of comb-shaped branch electrodes facing each other at a predetermined distance, or for example, one or both of them is mesh-shaped and a mesh insulator is used. This method is relatively simple, by providing at least one pair of electrodes facing each other with the electrodes in between, and by identifying that the electrical characteristics between these electrodes change when they are electrically coupled through adhering rainwater, etc. This has the effect of creating a rain sensor that is both large and inexpensive. (2) By configuring a rain alarm word that detects and notifies the onset of rain based on the rain sensor as described in +1 above, you can know about the rain at the beginning and prevent the dried fish from getting too wet. {3} Rainproof systems such as clothes drying equipment that detects rain or its onset and automatically stores dried food based on rain sensors such as those described in Doki Section 111. By configuring this, it is possible to obtain the effect that dried fish can be taken outside with peace of mind, especially in households with two income earners.The invention made by the present inventor has been specifically explained above based on examples, It goes without saying that the embodiment is not limited to the above embodiment, and can be modified in various ways without departing from the gist thereof.For example, in the rain sensor shown in FIGS. 1 and 2, the outer shape of the substrate P is , circular, etc., and the shapes of the electric poles T1 and T2 and the technical electrodes TBI and TB2 can also take any shape, such as wavy or maze-like.Furthermore, the rain sensor is provided with a plurality of pairs of electrodes,
Rain may be detected only when changes in electrical characteristics are identified in all electrodes. electrode'
rl and T2 do not need to be formed on the same plane in a strict sense, and electronic circuits such as the detection section RD and the speaker drive section SD can be arranged on the substrate P at the same time. Electrodes mTl and T2 and branch electrodes BTI and B
The substrate for forming T2 etc. may be a semiconductor substrate such as single crystal silicon. In FIGS. 3 and 4, the electrode T2 may be formed of a plate-shaped conductor, or may be integrated with the holding frame HG. Further, the electrodes Tl and T2 and the insulating network IN may have a grid shape instead of a mesh shape. The rain sensor may have multiple pairs of electrodes, or may have means for forcibly removing rainwater etc. adhering to each electrode. The rain sensor of FIGS. 1 to 4 includes electrodes TI and 7.
For example, capacitance or the like may be used as the electrical property between the two. In FIGS. 5 to 8, the rain alarm may use a buzzer, an indicator light, etc. as its notification means, and a holding means for fixing its main body to, for example, a clothesline. It is also good to have The power supplied to the rain alarm is arbitrary, and its operation method is not restricted by this embodiment. In the embodiment of FIG. 8, the rain sensor R
Although only the rain sensor RS is housed in an independent box BXI, both the rain sensor RS and the detection section RD may be housed in the box BX1. In this case, the output signal of the detection unit RD can also be transmitted to the speaker drive unit SD or the like as a wireless signal or the like. In Figures 9 and 10, the rain sensor RS is fixed to the top of the pillar pt, but by fixing it to the outermost clothesline DP, for example, it can be stored under the eaves together with the dried clothes DO. Good too. In FIGS. 9 to 12, the wire winder WW may be provided with a timer to automatically store the dried fish Do or operate the shafter SH, for example, near evening when sunlight is weak. Also, it is not necessary to hang dried fish on the clothesline DP,
Various methods can be considered to prevent dried fish from getting wet in the rain. Further, such a clothes drying facility could be constructed by being integrated with a house or the like in advance, for example.

In FIGS. 5 to 8 and 9 to 12, rain sensors other than those shown in FIGS. 1 and 2 or 3 and 4 may be used as the rain sensor RS. can. In the above explanation, the invention made by the present inventor was mainly explained in the case where the rain sensor for keeping laundry, futons, etc. For example, it can be used for clothes drying equipment that uses the sun to dry agricultural products and seafood, and on the other hand, equipment that actively utilizes rain, etc.
INDUSTRIAL APPLICABILITY The present invention can be widely used as equipment or management means that is effective in detecting at least rainfall or its onset. [Effects of the Invention] The effects obtained by typical inventions disclosed in this application are briefly explained below. That is, for example, at least a pair of electrodes are formed on the same plane and have a plurality of comb-like branch electrodes facing each other at a predetermined distance, or, for example, one or both of the electrodes are formed in a net shape, and a net-shaped insulator is sandwiched between the electrodes. This method is relatively simple and can be achieved by providing at least a pair of electrodes facing each other, and identifying that the electrical characteristics between these electrodes change when they are electrically coupled through adhering rainwater, etc. In addition, an inexpensive rain sensor can be realized. In addition, by configuring rain prevention systems such as rain alarms that detect and notify the onset of rain or drying equipment that automatically takes in dried fish based on such rain sensors, it is possible to prevent dried fish from getting too wet. You can bring it into your home or, for example, in a dual-income household, you can safely serve dried fish.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a first embodiment of the rain sensor to which the present invention is applied, and FIG. 2 is a plan view showing an embodiment of the rain sensor shown in FIG. 1.
A sectional view, @3 is a plan view showing a second embodiment of the rain sensor to which the present invention is applied, and FIG. 4 is a line BB' showing an embodiment of the rain sensor in FIG.
5 is a plan view showing a first embodiment of the rain alarm system to which the present invention is applied; FIG. 6 is a side view showing an embodiment of the rain alarm system of FIG. 5; The figure is a functional block diagram showing one embodiment of the rain alarm in Fig. 5, Fig. 8 is a functional block diagram showing another embodiment of the rain alarm word in Fig. 5, and Figs. 9 and 10. Figure 1 is a structural diagram showing a first embodiment of a rainproof system (clothes drying equipment) to which this invention is applied. Figure TI and Figure 12 are rainproof systems (clothes drying equipment) to which this invention is applied. FIG. 2 is a structural diagram showing a second embodiment of P... Board, TI, T2... Electric rod, TBI, TB2
...Technical wire, LL, L2...Lead wire, RD...
Rainwater. HG... Holding frame HG, IN... Insulation net. BX, BXI. BX2...Case, RS...
・Rain sensor, EC...Electronic circuit section, RD...Detection section, MP...Operation section, SD...Speaker drive section, SP
...Speaker, BAT...dry battery, pow...power supply section.

Claims (1)

[Scope of Claims] 1. A rain sensor comprising at least a pair of electrodes whose electrical characteristics are changed by being electrically coupled via attached rainwater or the like. 2. Claim 1, wherein the paired electrodes are formed on the same plane and each has a plurality of branch electrodes facing each other at a predetermined distance. Rain sensor as described in section. 3. The above-mentioned pair of electrodes is characterized in that one or both of the electrodes are mesh-shaped and face each other with a mesh-shaped insulator having a predetermined thickness in between. rain sensor. 4. A rain sensor including at least one pair of electrodes whose electrical characteristics are changed by being electrically coupled via attached rainwater, etc., and electrical characteristics between the electrodes forming a pair of the rain sensor. What is claimed is: 1. A rainfall alarm comprising: a detection section that identifies a change in the amount of rain; and a notification section that receives an output signal from the detection section and displays rain or its onset. 5. The detection unit and the notification unit are powered by a predetermined DC voltage supplied from a storage battery, and are housed in a case that can be easily moved together with the rain sensor and storage battery. A rain alarm according to claim 4, characterized in that: 6. The detection unit and the notification unit are powered by a predetermined DC voltage formed based on household AC voltage,
5. The rain alarm according to claim 4, wherein the rain alarm is housed in a case separate from the rain sensor together with a power supply unit that generates the DC voltage. 7. A rain sensor comprising at least one pair of electrodes whose electrical characteristics are changed by being electrically coupled via attached rainwater, etc., and an electrical connection between the pair of electrodes of the rain sensor. A rainproof system comprising: a detection section that identifies changes in characteristics; and a rainproof mechanism that receives an output signal from the detection section and prevents objects to be protected from getting wet with rainwater. 8. A patent claim characterized in that the rainproof mechanism moves the object to be protected placed outside the rainproof area into the rainproof area when the output signal of the detection section is validated. The rainproof system described in item 7. 9. The rainproof mechanism is characterized by moving a predetermined movable roof above the protected object placed outside the rainproof area when the output signal of the detection unit is validated. A rainproof system according to claim 7.