Photoelectric rain gauge

Abstract

The invention relates to a photoelectric rain gauge, and mainly solves the problems that an infrared optical detection rain gauge is high in power consumption and needs to be externally connected with a power supply to work. By adding a rain sensing detector, the whole machine is triggered to enter a working mode when it rains, and it is ensured that the infrared optical detection circuit and the main processor work only when it rains and enter a sleep mode at other times. After the power consumption of the whole rain gauge is reduced, the photoelectric rain gauge can be powered by a built-in battery, is convenient to install, can be installed, dismantled and moved anytime and anywhere, and is not restricted by an external power supply circuit.

Description

Technical field:

[0001] The invention relates to the technical field of meteorological observation equipment, and in particular to a photoelectric rain gauge. Background technology:

[0002] Rainfall is one of the six elements of meteorological observation and is a data reflection of the rainfall intensity in a region. A rain gauge is an important instrument for measuring the amount of precipitation in a region over a period of time. Previously, the most widely used was the tipping bucket rain gauge, but the tipping bucket rain gauge had problems such as difficulty in tipping when the rainfall was small and too frequent tipping when the rainfall was large; the internal mechanical mechanism was precise and required frequent maintenance. The photoelectric rain gauge uses the different light transmission properties when there are water droplets in the air, adopts the infrared optical detection principle, and is composed of a light emitting and receiving part. The electronic circuit judges the rainfall according to the signal of the photosensitive element of the light receiving part, and adopts a reliable algorithm to ensure reliable detection of rainfall. Since there are no mechanical accessories, no exposed parts, it is completely sealed and will not get water in, the internal conductor will not corrode due to contact with water, and the measurement of rainfall will not be affected by fallen leaves or other debris, and it is not affected by other factors. It is small in size, more durable, easy to maintain, sensitive and reliable, so it has been widely used.

[0003] Due to the use of infrared optical detection, the power of light emission is relatively large, and it is necessary to monitor rainfall information 24 hours a day, the whole machine consumes a lot of power. The current photoelectric rain gauges all require an external power supply. When external power supply is inconvenient, photovoltaic panels and energy storage batteries need to be used in combination with self-generated power supply, resulting in high costs and great restrictions on equipment installation and inconvenience. Based on this, it is necessary to provide a photoelectric rain gauge with low power consumption and built-in battery power supply in response to the above technical problems. It is easy to install and can be installed, removed, and moved anytime and anywhere without being restricted by external power supply lines. Summary of the invention:

[0004] A photoelectric rain gauge comprises three parts: a rain gauge main unit, an infrared optical detection head, and a rain sensing detector. The rain gauge main unit has a built-in battery, a main processor, a power management module, and a wireless communication module. The main processor controls the power supply of the infrared optical detection head and the wireless communication module through the power management module. Under normal circumstances, the power supply of the infrared optical detection head and the wireless communication module is turned off, and the main processor also enters a sleep mode to ensure that the whole machine is in a low power consumption state. When the rain sensing detector senses that it starts to rain, it triggers the main processor to exit the sleep mode, the main processor turns on the power supply circuit of the infrared optical detection head through the power management module, the infrared optical detection head starts to work, and the main processor enters an algorithm recognition mode to monitor the rainfall by calculating the photoelectric conversion information transmitted by the infrared optical detection head. When the rain sensing detector senses that the rain has stopped, the main processor promptly turns off the power supply circuit of the infrared optical detection head, the main processor stops the algorithm recognition mode, and the whole machine re-enters the sleep mode.

[0005] The main processor periodically turns on the power supply of the wireless communication module and transmits the monitored rainfall information to the central server.

[0006] Beneficial effects:

[0007] When the photoelectric rain gauge is in use, it is in sleep mode all the time except when it rains. The power consumption of the whole machine is extremely low, and the long-term normal operation of the whole machine can be guaranteed by using a built-in battery. This overcomes the problem that the photoelectric rain gauge needs to be in working mode 24 hours a day to monitor rainfall. Since the working mode consumes a lot of power, it needs to be powered by an external power supply. When the external power supply is inconvenient, photovoltaic panels and energy storage batteries need to be used for self-generation of power, which causes high costs and limited and inconvenient equipment installation. Not only does it reduce the power consumption of the equipment, but after using the built-in battery for power supply, the equipment installation is simple, convenient and flexible. It can be installed, dismantled and moved anytime and anywhere without being restricted by external power supply lines. Description of the drawings:

[0008] Figure 1 It is a schematic diagram of the structure of a photoelectric rain gauge;

[0009] Figure 2 It is a schematic diagram of the working principle of the photoelectric rain gauge;

[0010] Description of reference numerals:

[0011] 1-Rain gauge host; 2-infrared optical detection head; 3-rain sensor; 4-rain sensor electrode; 5-built-in battery; 6-main processor; 7-wireless communication module; 8-power management module. Specific implementation method:

[0012] The following specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the invention, they are protected by the patent law.

[0013] Embodiment 1: A photoelectric rain gauge, an infrared optical detection head 2 and a rain sensor 3 are installed on a rain gauge host 1, and connected to the host through a power line and a signal line. The rain gauge host 1 has a built-in battery 5, a main processor 6, a power management module 8 and a wireless communication module 7. The main processor 6 controls the power supply of the infrared optical detection head 2 and the wireless communication module 7 through the power management module 8. Under normal circumstances, the power supply of the infrared optical detection head 2 and the wireless communication module 7 is turned off, and the main processor 6 also enters the sleep mode to ensure that the whole machine is in a low power consumption state. When the rain sensor 3 senses that it starts to rain, it triggers the main processor 6 to exit the sleep mode, the main processor 6 turns on the power supply circuit of the infrared optical detection head 2 through the power management module 8, the infrared optical detection head 2 starts to work, and the main processor 6 enters the algorithm recognition mode to monitor the rainfall by calculating the photoelectric conversion information transmitted by the infrared optical detection head 2. When the rain sensor 3 senses that the rain has stopped, the main processor 6 promptly turns off the power supply circuit of the infrared optical detection head 2, the main processor 6 stops the algorithm recognition mode, and the whole machine re-enters the sleep mode.

[0014] The sensitive probe part of the rain detector 3 is equipped with a rain detector electrode 4, which is composed of three carbon electrodes separated by waterproof resin. A drop of distilled water with a diameter of 1 mm can change the sensor switch from "OFF" to "ON" mode. At this time, the sensor generates a change in signal output from 0V to more than 1.4V, triggering the main processor 6 to exit the sleep mode. The rain detector electrode 4 is installed at an angle of 30 to 40 degrees, so that excess water can slide off the surface in time, ensuring that the main processor 6 can re-enter the sleep mode in time after the rain stops. In order to ensure that the rainwater slides off faster, the rain detector electrode 4 can also be installed at an angle of 10 to 30 degrees.

[0015] The main processor periodically turns on the wireless communication module to transmit the monitored rainfall information to the central server.

[0016] The above is only a specific implementation of the invention, but the protection scope of the invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the invention, such as changing the carbon electrode of the rain sensor detector 3 to a metal electrode, increasing or reducing the number of carbon electrodes, changing the angle of the inclined installation of the rain sensor detector electrode 4, etc. These modifications or replacements should be included in the protection scope of the invention. Therefore, the protection scope of the invention should be based on the protection scope of the claims.

Claims

1. A photoelectric rain gauge, comprising a rain gauge main unit (1) and an infrared optical detection head (2), characterized in that A rain sensor (3) is installed on the rain gauge main unit (1).

2. A photoelectric rain gauge according to claim 1, characterized in that The probe part of the rain sensor (3) is provided with a rain sensor electrode (4), and the rain sensor electrode (4) is composed of three carbon electrodes separated by waterproof resin.

3. A photoelectric rain gauge according to claim 1, characterized in that The probe part of the rain sensing detector (3) is provided with a rain sensing detector electrode (4), and the rain sensing detector electrode (4) is composed of a metal electrode.

4. The rain sensing detector electrode (4) according to claim 2, characterized in that Install at an angle of 30 to 40 degrees.

5. The rain sensing detector electrode (4) according to claim 2, characterized in that Install at an angle of 10 to 30°.

6. A photoelectric rain gauge according to claim 1, wherein the rain gauge host (1) has a built-in battery (5), a main processor (6), a power management module (8) and a wireless communication module (7). The main processor (6) controls the power supply of the infrared optical detection head (2) and the wireless communication module (7) through the power management module (8). Under normal circumstances, the power is turned off, and the main processor (6) also maintains a sleep mode to ensure that the whole machine is in a low power consumption state. When the rain sensor (3) senses that it starts to rain, it triggers the main processor (6) to exit the sleep mode, the main processor (6) turns on the power supply circuit of the infrared optical detection head (2) through the power management module (8), the infrared optical detection head (2) starts to work, and the main processor (6) enters the algorithm recognition mode to monitor the rainfall by calculating the photoelectric conversion information transmitted by the infrared optical detection head (2). When the rain sensor (3) senses that the rain has stopped, the main processor (6) promptly turns off the power supply circuit of the infrared optical detection head (2), the main processor (6) stops the algorithm recognition mode, and the whole machine re-enters the sleep mode.

7. A photoelectric rain gauge according to claim 1, characterized in that the rain sensor (3) is not installed on the rain gauge host (1), but is connected to the rain gauge host (1) in an external manner.

8. A photoelectric rain gauge according to claim 1, characterized in that the infrared optical detection head (2) is installed on the rain gauge host (1).

9. A photoelectric rain gauge according to claim 1, characterized in that the infrared optical detection head (2) is not installed on the rain gauge host (1), but is connected to the rain gauge host (1) in an external manner.

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