Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01W—METEOROLOGY
  • G01W1/00—Meteorology
  • G01W1/14—Rainfall or precipitation gauges

Definitions

• the present invention relates to the field of meteorological detection technology, and particularly, to a rainfall detection plate and a rainfall detection device.
• the sensitivity of "rain stop” signal detection is improved to a certain extent by the detection means, the “rain stop” signal is often much more lagged than the actual rain stop and is sometimes lagged for more than 30 minutes; and in addition, the detection sensitivity on fine rain and drizzle still needs to be improved.
• an object of the present invention is to provide a rainfall detection plate; and another object of the present invention is to provide a rainfall detection device provided with the rainfall detection plate.
• a rainfall detection plate includes a detection electrode and a substrate, wherein the detection electrode is formed by an array of electrode plates arranged on the front surface of the substrate, and electrode plates in each row are connected with electrode plates in an alternate row through conducting wires to form a first electrode and a second electrode which are arranged alternately; the conducting wires are printed on the back surface of the substrate, and the electrode plates are connected with the conducting wires through via holes on the substrate.
• the present invention can also be further achieved by the following technical solutions: [0007] In the rainfall detection plate described above, the distance between two adjacent rows of electrode plates is 0.2-6mm.
• the electrode plates have different areas.
• each electrode plate is a circular electrode, a square electrode, a rectangular electrode or a triangular electrode.
• the diameter of the circular electrode is 1 -3.3mnn.
• the side length of the square electrode is 1 -3.3mnn.
• each electrode plate is a gilded sheet metal.
• a rainfall detection device includes a shell, wherein the rainfall detection device further includes a rainfall detection circuit and the rainfall detection plate described above; the rainfall detection plate is arranged on the upper surface of the shell; the first electrode and the second electrode of the rainfall detection plate are connected with the rainfall detection circuit respectively through conducting wires; and the rainfall detection circuit is composed of a comparator and a processor.
• the rainfall detection plate is arranged obliquely and forms an included angle of 45 degrees with respect to the horizontal plane.
• the rainfall detection plate is adhered on the upper surface of the shell by epoxy resin or a double-sided adhesive [0017] Compared with the prior art, the present invention at least has the following advantages:
• the conducting wires are arranged on the back surface of the substrate to effectively prevent rainfall from being hanged on the edges of the conducting wires to affect the "rain stop" detection; the electrode plates with different spacings and areas are arranged on the rainfall detection plate to detect raindrops with different diameters, and a minimal single raindrop of phi 0.1 mm can be detected, which is enough to meet the requirements of environmental detection; moreover, due to the above structure, the area of the substrate can be fully utilized while the measurement precision is guaranteed, the structure is compact and beautiful, the arrangement is more free and convenient, and substrates with various sizes and shapes can be adapted to.
• the electrode plates are gilded to prevent corrosion and rustiness of the electrode plates, so as to guarantee good electrical conductivity.
• the rainfall detection plate is arranged obliquely for 45 degrees to quickly respond to the rainfall signal, namely can respond to falling raindrops within 0.1 second, and can also facilitate the rainwater quickly flowing down (the rainwater can slide off within 10 seconds), thus the rain stop detection sensitivity is improved.
• the rainfall detection plate and the rainfall detection device of the present invention are sensitive in raindrop sensing and capable of effectively shortening the lagged time of "rain stop" signal detection, and are reliable in work, long in service time, small in power consumption, simple in structure, high in adaptability, low in cost and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS
• FIG. 1 is a schematic diagram of a front surface of a rainfall detection plate of the present invention
• FIG. 2 is a schematic diagram of a back surface of a rainfall detection plate of the present invention.
• FIG. 3 is a structural schematic diagram of a rainfall detection device of the present invention.
• Fig. 4 is a functional structure diagram of a rainfall detection device of the present invention
• Fig. 5 is a schematic circuit diagram of a rainfall detection device of the present invention.
• the rainfall detection plate 1 of the present invention includes a detection electrode and a substrate 2, wherein, the detection electrode is formed by an array of electrode plates 3 arranged on the front surface of the substrate, and electrode plates 3 in each row are connected with electrode plates in an alternate row through conducting wires 4 to form a first electrode and a second electrode which are arranged alternately; the conducting wires 4 are printed on the back surface of the substrate 2, and the electrode plates are connected with the conducting wires through via holes (not shown in the figures) on the substrate.
• the via holes are through holes wrapped with a copper foil.
• the conducting wires are arranged on the back surface of the substrate to effectively prevent rainfall from being hanged on the edges of the conducting wires to affect the "rain stop" detection; the electrode plates with different spacings and areas are arranged on the rainfall detection plate to detect raindrops with different diameters, and a minimal single raindrop of phi 0.1 mm can be detected, which is enough to meet the requirements of environmental detection; moreover, due to the above structure, the area of the substrate can be fully utilized while the measurement precision is guaranteed, the structure is compact and beautiful, the arrangement is more free and convenient, and substrates with various sizes and substrates can be adapted to. [0030]
• the embodiment can be further achieved by the following structure:
• the distance D between two adjacent rows of electrode plates is 0.2-6mm. Therefore, the minimal raindrops of phi 0.1 mm can be detected.
• the electrode plates In the rainfall detection plate described above, the electrode plates have different areas.
• the areas of the electrode plates change by gradually decreasing from the center of the array to the outer side, but is not limited thereto, and the arrangement manner of the electrode plates can be adjusted according to the size and the shape of the substrate.
• each electrode plate is a circular electrode, a square electrode, a rectangular electrode or a triangular electrode (the circular electrode is as shown in Fig. 1 , and other electrodes are not shown), but is not limited thereto.
• the diameter of the circular electrode is 1 -3.3mm.
• the diameters of the circular electrodes are sequentially 3.3mm, 2.8mm, 2.4mm, 1 .8mm and 1 mm.
• the side length of the square electrode is 1 -3.3mm.
• each electrode plate is a gilded sheet metal. Corrosion and rustiness of the electrodes can be prevented to guarantee good electrical conductivity.
• a rainfall detection device including a shell 5, wherein the rainfall detection device further includes a rainfall detection unit 6 and the rainfall detection plate 1 described above; the rainfall detection plate 1 is arranged on the upper surface of the shell 5; the first electrode and the second electrode of the rainfall detection plate are connected with the rainfall detection unit 6 respectively through conducting wires; and the rainfall detection unit 6 is composed of a comparator 61 and a processor 62.
• the rainfall detection plate 1 is arranged obliquely and forms an included angle of 45 degrees with respect to the horizontal plane.
• the rainfall detection plate is arranged obliquely for 45 degrees to quickly respond to the rainfall signal, namely can respond to falling raindrops within 0.1 second, and can also facilitate the rainwater quickly flowing down (the rainwater can slide off within 10 seconds), thus the rain stop detection sensitivity is improved.
• the rainfall detection plate 1 is adhered on the upper surface of the shell 5 by epoxy resin or a double-sided adhesive.
• a detection circuit of a rainfall signal is as follows: one end of the rainfall detection plate 1 is connected with an in-phase input end of the comparator 61 , and the other end thereof is grounded. An inversion input end of the comparator 61 is connected with a slide rheostat VR1 , and the other two ends of the slide rheostat VR1 are connected with a power supply VCC and the ground respectively.
• the in-phase input end of the comparator 61 is connected with one end of a resistor R1 , the other end of the resistor R1 is connected with the power supply VCC, an output end of the comparator 61 is connected with a pin P0.1 end of the processor 62, and the pin P0.1 end of the processor is used for detecting level variation.
• the processor can collect the level variation through the pin P0.1 to determine the presence of rainfall.
• the rainfall detection plate and the rainfall detection device of the present invention are sensitive in raindrop sensing, and capable of effectively shortening the lagged time of "rain stop” signal detection, and are reliable in work, long in service time, small in power consumption, simple in structure, high in adaptability, low in cost and convenient to use.

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• Life Sciences & Earth Sciences (AREA)
• Environmental & Geological Engineering (AREA)
• Hydrology & Water Resources (AREA)
• Engineering & Computer Science (AREA)
• Atmospheric Sciences (AREA)
• Biodiversity & Conservation Biology (AREA)
• Ecology (AREA)
• Environmental Sciences (AREA)
• Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

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Citations (5)

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• 2014
  • 2014-09-30 CN CN201410525504.5A patent/CN104375212A/zh active Pending
• 2015
  • 2015-09-26 WO PCT/US2015/052514 patent/WO2016053811A1/en active Application Filing

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