CN2089637U - Senser cabable of resolving rainfall strength for rain and snow - Google Patents

Abstract

The utility model discloses a sensor capable of resolving rainfall strength for rain and snow, which is mainly used for collecting water samples of rainfall and can also be used for the aspects of rain prevention, snow prevention, etc. The utility model is composed of a detector, a heater and an electric circuit part. The detector is of an umbrella-shaped network structure, both the An electrode and the B electrode of the detector are made of metallic material which has good electric conduction performance and which is rustless. When rain or snow fall on the detector, the electric circuit part transforms the signal of rain or snow into electric pulse signal which is directly proportional to the signal of rain or snow. The utility model has the advantages of high sensitivity, good anti-interference performance, reliable work, the ability of resolving rainfall strength, dual purpose for both rain and snow, long service life, etc.

Description

Senser cabable of resolving rainfall strength for rain and snow

The utility model relates to a kind ofly can differentiate precipitation intensity, and the sleet synthesis sensor is mainly used in the collection of precipitation water sample, also can be used for aspects such as rainproof snow defence.

Up to now precipitation sensor, a kind of is netted sensor, and during work, it is actionless, and when raining, raindrop just form an electric signal with the dual purpose electrodes short circuit together.Its major defect is: 1, poor sensitivity, and a good sensor has electric signal output in the time of should being rainy at once, and in the rain stopping time, electric signal disappears immediately.And this sensor as long as rainwater is not dried, just has electric signal output always after rain stops.2, interference free performance is poor, for example, when birds droppings drops on the sensor, electric signal output is arranged equally, as long as birds droppings is not done, electric signal output is just arranged always, causes the misoperation of sampling system, as the contaminated samples bottle of uncapping.3, can not adopt snow, because the resistance value of snow than the big manyfold of water, though snow can drop on the sensor, does not have electric signal output.4, the life-span short because this kind sensor makes with copper clad plate, through can't stand nearly 90 ℃ the scorching and subzero 40 ℃ severe cold in winter of sunlight in summer, copper clad plate is very fast distortion, the electrode damage that comes off.

Another kind of rotating detector, its output electric signal is a straight signal that has nothing to do with precipitation intensity, does not differentiate the ability of precipitation intensity, does not have what difference with netted sensor in this.Thereby it can not effectivelyly overcome shower, drizzle, birds droppings etc., and some do not gather the interference of the wet thing of value.Because its structure is to have adopted to erode away A, B the two poles of the earth on copper clad plate, thereby the life-span is short and can not adopt snow.

The purpose of this utility model is will provide a kind of can differentiate precipitation intensity, the sleet synthesis sensor, it can be converted to sleet the electric impulse signal that is directly proportional with it, thereby effectively overcomes the shortcoming of above two kinds of sensors, guarantees rainwater sampling system reliably working.

The utility model sensor is by detecting device, well heater and circuit part are formed, on detecting device, there are the A utmost point and the B utmost point and circuit to join, the A utmost point is a kind of umbrella shape reticulate texture, the B utmost point also has and the similar reticulate texture of A utmost point shape, the material that the reticulate texture of the A utmost point and the B utmost point all adopts 1.5 to 2mm corrosion resistant plate or aluminium sheet etc. to conduct electricity very well is made, and two are extremely all adopted epoxy resin bonding on insulating material, and are fixed on the motor shaft.Link to each other and ground connection with brush between the A utmost point and the motor shaft, the B utmost point is drawn by brush and is connect+24V, and brush is installed, well heater, motor in the space of taking shelter from rain that utilizes the umbrella shape utmost point to form.Wherein, heating usefulness when well heater is used for adopting winter snow, last space mounting sensor line plate below motor.Need to prove, the tapered segment in the middle of the structure of this sensor be the A utmost point last, the B utmost point insulate with insulating material down.The mesh portion at A, B the two poles of the earth then in one plane is arranged in parallel, with air insulation.The sensitivity of the area of mesh portion during with precipitation is directly proportional, and area is big more, and sensitivity is high more.Gap and sensitivity between mesh portion A, B the two poles of the earth are inversely proportional to, and the gap is more little, and sensitivity is high more.This reticulate texture is convenient to the landing of snowflake and is accumulated simultaneously.When the tapered segment of A in the middle of extremely is convenient to rainfall rainwater cut and get rid of to.Simultaneously can make the space of taking shelter from rain preferably relevant motor, well heater etc. are installed.

The utility model principle of work is such: during no rain, this sensor remains static.When raindrop drop on the netted ring of sensor cross-over connection A, B the two poles of the earth, circuit is connected, the driven by motor sensor rotates at once, utilize centrifugal force that water droplet is got rid of the utmost point to B by the A utmost point, raindrop is big more, the raindrop number is many more, need the time of drying long more, the time of A, the cross-over connection of B the two poles of the earth is long more, and the electric pulse number of output is many more.Raindrop is more little or the raindrop number is few more, needs the time of drying short more.The time of A, the cross-over connection of B the two poles of the earth is short more, and the number of output electric pulse is few more.As long as rainy, sensor just rotation always goes down, and circuit just has pulse signal output always.After rain stopped, sensor was with last drying of dripping, and pulse-free signal is exported, and sensor stops the rotation.When snowing, heater heats (getting final product more than 5 ℃) snow becomes water on sensor, and all processes are identical with the process that the rain signal becomes electric impulse signal then.

Be further described below in conjunction with accompanying drawing:

Fig. 1 is the cut-open view of the utility model sensor

Fig. 2 is the vertical view of Fig. 1

Fig. 3 is that the C of Fig. 2 is to cut-open view

Fig. 4 is the circuit theory diagrams of the utility model sensor

Be by extended four wings of cone body and on four wings, fix many annulus and constitute a kind of umbrella shape mesh electrode that with reference to Fig. 1, the A utmost point (1) the B utmost point (2) also is a similar mesh electrode.Two electrodes are made and are installed on the insulator cone (3) by non-corrosive and electric conductivity good metal material.Insulator cone (3) direct connection is on the axle of motor (7).Lean on closely but mutual insulating between the conductive ring of the conductive ring of the A utmost point (1) and the B utmost point (2) is mutual, the A utmost point (1) links to each other with the axle of motor (7) by two-sided brush (10) and connects on the sensor path plate (9), and the B utmost point (2) connects sensor path plate (9) by brush (5).Well heater is positioned at B utmost point below, is installed on the insulcrete (6), and motor (7) is installed on the insulcrete (6), and annular shell (8) is fixed on the insulcrete (6), and sensor (9) is positioned at the inner below of shell (8).

Fig. 2 is the vertical view of Fig. 1, and it has reflected that the netted utmost point of umbrella shape has between the webbed region of four symmetries.

Fig. 3 be the C of Fig. 2 to cut-open view, it reflected A, B around mesh portion be to locate at grade.

Fig. 1, Fig. 2, Fig. 3 have clearly reflected the physical construction of whole sensor, when the tapered segment in the middle of the sensor is convenient to precipitation rainwater cut and get rid of to, this part is that the A utmost point is last, the B utmost point is following, insulate with insulating material in the two poles of the earth, the mesh portion around the sensor is convenient to the landing of snowflake and is accumulated and the detection of rainwater when static.This part A, B the two poles of the earth are in same plane, are arranged in parallel, with air insulation.And the area of mesh portion is directly proportional with transducer sensitivity, and gap and transducer sensitivity between A, the B the two poles of the earth annulus are inversely proportional to.

Fig. 4 is the circuit theory diagrams of the utility model sensor, and its circuit theory is described in detail as follows:

F1, F2, R8, C3 form a multivibrator, export the square-wave pulse signal that frequency is F.During no rain, A, B the two poles of the earth open circuit, the base stage of BG1 be " 0 " current potential, BG1 ends, the BG2 saturation conduction, the collector output level "0" of BG2 pins the YF door, and YF1 exports level"1", the BG3 conducting, BG4, BG5 end, and the BG5 emitter is exported level "0".When water droplet cross-over connection A, B the two poles of the earth, form contact resistance R ₀, R ₀With the Rw dividing potential drop, the BG1 base stage is risen to about Vw+2v by original " 0 " current potential, the BG1 conducting, and BG2 ends, and the collector output level"1" of BG2 is opened the YF door, through BG4 emitter output square-wave pulse sequence.Raindrop are big, and the drying time is long, and A, B the two poles of the earth jump time are long, and the pulse number of output is many.Raindrop are little, and the drying time is short, and the time of A, the cross-over connection of B the two poles of the earth is short, and the pulse number of output is few.So just finished by the rain conversion of signals is the process of electric impulse signal.

The utility model compared with prior art has following advantage in sum:

1, highly sensitive, the physical construction of this sensor combines with circuit and makes it highly sensitive in any precipitation sensor, and K is a constant in the sensitivity M=KS/ δ F formula, and S is a sensor area, δ is the plane clearance of A, B the two poles of the earth conductive ring, and F is the oscillation frequency of circuit multivibrator.Rainy have electric impulse signal to export at once, and no rain electric impulse signal disappears at once.In the ordinary course of things, sensor adopts no rain static, rainy working method.Detect or the collection drizzle at needs, mist etc. in particular cases can make sensor be in the working method of continuous rotation.

2, precipitation intensity there is resolution capability.The ability that these characteristics can make the precipitation sampling system have selection to gather to precipitation character, this also is that other precipitation sensor is not available.

3, antijamming capability is strong, because this sensor has resolution capability to precipitation intensity, when matching with corresponding sampled-data control system, has good antijamming capability.For example: the precipitation sampled-data control system is set the sampling of just uncapping when per minute has 6 rain pulse signals, when birds droppings or other conducting objects drop on the sensor, sensor rotates at once, birds droppings or other foreign matter are got rid of, only produce one or two pulse signal this moment, do not reach 6, adopt the generation that this has just reduced misoperation so sampling system is paid no attention to.As a same reason, in the ordinary course of things, also can well avoid for interference such as the drizzle of not gathering value, mist, showers.

4, working method the best, no rain is static, and rainy rotation reduces electric energy loss, prolongs electrical machinery life.

5, the two poles of the earth material adopts metal construction, air insulation, anti-aging, the length of receiving a mandate.

6, mist, rain, snow are all available, and reliable operation uses the zone wide, is precipitation sensor worthy of the name.

Provide specific embodiment below: Fig. 1, Fig. 2, shown in Figure 3 are pressed in the physical construction aspect, and the front is described in detail, have just no longer repeated here.Get by shown in Figure 4 the circuit aspect

Rw＝500K R1＝50K R2＝20K R3＝2K R4＝100K

R5＝5K R6＝12K R7＝2K R8＝390K R9＝30K

R10＝10K R11＝15K C1＝4.7μ C2＝4.7μ C3＝0.01μ

W1=2CW17 W2=2CW17 BG1 is that 3DG6DBG3 gets 24V for 3DG6D BG5 for 3DG12B VE for 3DG6D BG4 for 3DG6D BG2

Above-listed element is installed on the printed-wiring board (PWB) by Fig. 4, reinstall and get final product in the sensor.

Claims (5)

1, a kind ofly can offer an explanation precipitation intensity, the sleet synthesis sensor, form by detecting device, well heater, circuit part, it is characterized in that the A utmost point (1) is extended four wings of cone-shaped body and fixes a kind of umbrella shape mesh electrode that many annulus constitute on four wings, the B utmost point (2) also is a similar mesh electrode, and two electrodes all adopt and conduct electricity very well and rustless metal material is made.

2, according to claim: 1 described sensor is characterized in that conductive ring parallel being arranged in together uniformly at interval of conductive ring with the B utmost point (2) of the A utmost point (1), leans on closely between them but mutual insulating.At gap location, the conductive ring at A, B the two poles of the earth is on the same plane.

3, sensor according to claim 1 is characterized in that the A utmost point (1) and the B utmost point (2) are fixed together by insulator (3), and direct connection is on the axle of motor (7).

4, sensor according to claim 1 is characterized in that detecting device combines with circuit part, with the electric impulse signal that the sleet conversion of signals becomes to be directly proportional with it, makes sensor have the ability of explanation precipitation intensity.

5, sensor according to claim 1 is characterized in that using heater heats to make snow turn to water, finishes the task of detecting snow.

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