CN203217098U

CN203217098U - Low-power wireless rainfall detection device

Info

Publication number: CN203217098U
Application number: CN 201320190800
Authority: CN
Inventors: 肖兰
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-04-16
Filing date: 2013-04-16
Publication date: 2013-09-25
Anticipated expiration: 2023-04-16

Abstract

A low-power wireless rainfall detection device comprises a rainfall-sensing module, a micro processing module, an external storage module, a clock module, a dial switch module, a wireless communication module and a power supply module and is characterized in that the micro processing module is connected with the rainfall-sensing module, the external storage module, the clock module, the dial switch module, the wireless communication module and the power supply module respectively, and the power supply module is also connected with the rainfall-sensing module, the storage module, the clock module and the wireless communication module respectively. When there is rain, the rainwater collected by the rainfall-sensing module, through a water diversion nozzle, enters a metering cylinder to drive a measuring wheel for driving a photoelectric encoder to rotate simultaneously so that the encoder may output coded data corresponding to a rainfall height; the coded data is directly read by the micro processing module in a parallel mode and then converted into corresponding natural binary code; and rainfall data is formed through scale transformation and stored through the external storage module. In case of no rain or no hourly chime, the micro processing module cuts off power supplies of other modules except that of the clock module and comes into a state of dormancy; and in case of rainfall and hourly chime, the stored rainfall data is automatically sent to an upper PC terminal through the wireless communication module in a wireless transmission mode so that statistics and analysis of data by the upper PC is facilitated. Besides, the dial switch module may set a physical address for the rainfall detection device.

Description

Low-consumption wireless rainfall pick-up unit

Technical field

The utility model relates to a kind of rainfall pick-up unit, especially low-consumption wireless rainfall pick-up unit.

Background technology

The rainfall pick-up unit of weather station, hydrometric station use mostly is hydrocone type or tipping bucket type at present, and hydrocone type does not have electric signal interface, can't realize rainfall amount measurement and storage automatically; And the tipping bucket type measuring accuracy is low, and measuring error changes violent with rainfall intensity, and system power dissipation is big, needs ac power supply.

Summary of the invention

In view of above these situations, the utility model provides a kind of low-consumption wireless rainfall pick-up unit, partly formed by mixed-signal processor MSP430, rain sensor, wireless data transmission chip nRF905, battery supply etc., the components and parts that adopt in the circuit system require to select according to low power dissipation design, adopt corresponding hardware and software control technology to reduce average power consumption for the bigger device of power consumption.

The technical scheme that its technical matters that solves the utility model adopts is: a kind of low-consumption wireless rainfall pick-up unit, comprise rainfall sensing module, micro treatment module, outer memory module, clock module, toggle switch module, wireless communication module, power module, it is characterized in that: micro treatment module is connected with rainfall sensing module, outer memory module, clock module, toggle switch module, wireless communication module, power module respectively, and power module also is connected with rainfall sensing module, outer memory module, clock module, wireless communication module respectively.When rainfall, the rainwater that the rainfall sensing module is assembled enters metering cylinder through the diversion mouth, driving measuring wheel driving photoelectric encoder rotates synchronously, scrambler is the exportable coded data corresponding with the precipitation height, adopt parallel mode directly to read by micro treatment module, convert corresponding natural binary code then to, pass through gauge transformation again, form rainfall data and store by outer memory module, in no rainfall or do not have under the situation that integral point gives the correct time, micro treatment module is closed the power supply of other modules except clock module, enters dormant state then.Under the situation that rainfall and integral point give the correct time, can automatically the rainfall data of storing be sent to upper PC end by wireless communication module with Wireless transmission mode, with the statistics and analysis of the data of convenient upper PC, the toggle switch module can arrange rainfall pick-up unit physical address.

The beneficial effects of the utility model are, the beneficial effects of the utility model are, have low in energy consumption, measure accurate, use characteristics such as simple, data wireless transmission, have higher utility.

Description of drawings

Fig. 1 is theory diagram of the present utility model.

Embodiment

In Fig. 1, a kind of low-consumption wireless rainfall pick-up unit, comprise rainfall sensing module 1, micro treatment module 2, outer memory module 3, clock module 4, toggle switch module 5, wireless communication module 6, power module 7, it is characterized in that: micro treatment module 2 is connected with rainfall sensing module 1, outer memory module 3, clock module 4, toggle switch module 5, wireless communication module 6, power module 7 respectively, and power module 7 also is connected with rainfall sensing module 1, outer memory module 3, clock module 4, wireless communication module 6 respectively.When rainfall, the rainwater that rainfall sensing module 1 is assembled enters metering cylinder through the diversion mouth, driving measuring wheel driving photoelectric encoder rotates synchronously, scrambler is the exportable coded data corresponding with the precipitation height, adopt parallel mode directly to read by micro treatment module 2, convert corresponding natural binary code then to, pass through gauge transformation again, form rainfall data and store by outer memory module 3, in no rainfall or do not have under the situation that integral point gives the correct time, micro treatment module 2 is closed the power supply of other modules except clock module 4, enters dormant state then.Under the situation that rainfall and integral point give the correct time, can automatically the rainfall data of storing be sent to upper PC end by wireless communication module 6 with Wireless transmission mode, with the statistics and analysis of the data of convenient upper PC, toggle switch module 5 can arrange rainfall pick-up unit physical address.

Rainfall sensing module 1 sensor adopts the numerical coding formula water level meter of 0.1mm high resolution, and it was made up of metering cylinder (float tube), tipping bucket, float, measuring cable, balance bob, measuring wheel, axle sleeve, absolute value type optical rotary encoder, last lower support plate, solenoid valve, draining sand excluding valve, communicating pipe etc.By encoding and decoding rainfall data is output as 9 Gray codes, adopts parallel mode directly to read by micro treatment module 2.Micro treatment module 2 has adopted the mixed-signal processor MSP430 with super low-power consumption characteristic as control and processing core.When rainfall and system parameter setting, adopt interrupt mode to handle, look-at-me can be waken MSP430 up and enter duty from dormant state in 6 μ s, after processing finishes, the power supply of closing corresponding module immediately returns dormant state, to reduce system power dissipation.Outer memory module 3 has adopted low-power consumption high-capacity flash memory chip SST28VF040A, does not have at rainfall data under the situation of compression and can preserve 12～18 months rainfall data, and the concrete holding time is determined by rainfall number of times and rainfall amount.The clock circuit that clock module 4 has adopted the high precision clock chip DS1305 of Dallas company to constitute is used for providing data acquisition time and integral point time signal to micro treatment module 2.DS1305 has serial line interface and has the timing alarm function, adopt binary-coded decimal represent the second of real-time clock, branch, hour, the temporal information of week, day, Month And Year.Toggle switch module 5 is made up of six toggle switches, and the difference by the switch shelves arranges different physical addresss.Wireless communication module 6 adopts the nRF905 radio transmitting and receiving chip of Nordic company.This chip operation is in Surveillance center's ISM band of 433/868/915MHz.Formed by the receiver of a fully-integrated frequency modulator, a band detuner, a power amplifier, a crystal oscillator and a regulator.Message transmission rate can reach 100kbps, supports point-to-point transmission mode and broadcasting transmission mode.The nRF905 operating voltage is 1.9-3.6V, and power consumption is very low, and working current only is 25uA under this core power mode.NRF905 adopts the VLSI ShockBurst technology of Nordic company, can provide high speed data transfer and does not need expensive high speed MCU to carry out that data are handled and the clock covering.Be put in the chip by the high speed signal relevant with the RF agreement handled, nRF905 can offer the microprocessor-individual SPI interface of application, and the interface rate that speed is set by microprocessor oneself determines.

Claims

1. low-consumption wireless rainfall pick-up unit, comprise rainfall sensing module (1), micro treatment module (2), outer memory module (3), clock module (4), toggle switch module (5), wireless communication module (6), power module (7), it is characterized in that: micro treatment module (2) respectively with rainfall sensing module (1), outer memory module (3), clock module (4), toggle switch module (5), wireless communication module (6), power module (7) connects, power module (7) also respectively with rainfall sensing module (1), outer memory module (3), clock module (4), wireless communication module (6) connects.