The Guizhou Provincial Soil and Water Conservation Technology Consulting and Research Center is a self-supporting and self-supporting institution affiliated to the Guizhou Provincial Water Resources Department's Soil and Water Conservation Monitoring Station, which was established by the provincial editorial office and issued by [2010] No. 18 document. Its main purpose is to promote the development of science and technology in soil and water conservation and promote the construction of ecological environment. The unit consists of comprehensive department, finance department, technical department, monitoring department, consulting and evaluation department, and planning and design department. There are nearly 40 professional and technical personnel, including more than 20 professional technical titles above the intermediate level, covering soil and water conservation, forestry, hydrology, water conservancy and hydropower engineering, engineering geology, soil science, ecology, geographic information, administrative management, computer, law and other majors. . Our center holds Grade A qualification for soil and water conservation monitoring of production and construction projects, four-star qualification for water and soil conservation planning, Grade B qualification for engineering consulting, and Grade C qualification for forestry survey planning and design. It is currently the only Grade A qualification unit for soil and water conservation monitoring in production and construction projects in Guizhou Province.
The large-scale water and soil loss online monitor adopts ARM technology, which has high reliability and strong stability. It is more cost-effective than the automatic monitoring equipment for runoff in the runoff community produced by 8-bit single-chip microcomputer and photoresistor.
ã€performance】
First, the sensor description
1. Description of the liquid level sensor:
The company's self-developed liquid level sensor has an accuracy of ±0.5mm. The measuring range is 0-80 mm.
Slave collector description
The slave collector mainly collects the liquid level and sediment content of each runoff cell, and packs and sends out the data according to the needs of the data collector.
The slave collector collects 30 data in 30 seconds, adopts linear filtering and averages to ensure the accuracy of the system data.
Second, the data collector description
The data collector can store 8 Mbytes of data locally, and the data can be stored in the field.
The data communication protocol is as follows:
The communication protocol between the handset and the host is:
The host sends to the slave: 0XF1 0XF1 0XF1 00 02 D3 The first three 0XF1 represent the No. 1 slave, and the 0XD3 represents the lower 8 bits of the accumulated sum check.
The transmission protocol of the sub-machine 2 is: 0XF2, 0XF2, 0XF2, 00, 02, 0XD6;
The transmission protocol of the sub-machine 3 is: 0XF3, 0XF3, 0XF3, 00, 02, 0XD9;
The transmission protocol of the slave 4 is: 0XF4, 0XF4, 0XF4, 00, 02, 0XDC;
The transmission protocol of the slave 5 is: 0XF5, 0XF5, 0XF5, 00, 02, 0XDF;
The slave receives the data and averages the data collected every second for 30 seconds. When the slave receives the data, it sends the previous average value to the data collector. The data collector receives 5 sets of data and records No. information, time, 5 sets of data are saved to the flash memory, and then continue to collect data, and when 59 minutes and 00 seconds per hour, the data collector system starts to automatically dial, if the data collector dials successfully, it starts to go up. The machine sends the current record number of the machine. After receiving the machine record number, the host computer sends the school time command to ensure that the time of the server is consistent with the time of the data collector. Then the server determines whether it needs to supplement the latest data. If the latest data is needed, Then, the server requests data from the data collector, and then the data collector sends the data to the system through the DTU.
The communication protocol between the server and the data collector is as follows:
Send registration information
Server: 01 02 6F 08 18 15 0A 1E AA School Time Command
Data Collector: 01 02 6F 08 18 15 0A 1E 00 00 01 F4 7B 01 AA
Read a historical data
Server: 01 03 00 00 01 5C AA [7 bytes]
Tester: 01 03 6F 08 18 15 0A 1E 00 00 01 F4 00 00 01 E9 00 00 28 0E 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 7B AA B1 [43 bytes]
Third, the server software description
It has the real-time monitoring and display of the dynamic process of each measurement parameter and the curve, historical data download and system automatic calibration function on the computer of the upper computer.
The host computer is developed based on the vc++6.0 programming environment. The consistency is good, the data storage is convenient and convenient, and the SQL-SEVER database is used to make the data query simple and convenient.
The server calculates the flow and the amount of sediment based on the data sent by the data collector.
ã€systems Manual】
1 Data collector and slave collector adopt RS485 communication connection, which can support communication distance of up to 800 meters. .
2 Using arm technology, the acquisition accuracy is high, the calculation speed is fast, and the life is extended.
3 The backlight can be eliminated by the button setting to reduce power consumption; the backlight can be set by pressing the button to facilitate data access; the rain delay information can also be modified by the button.
4The relay delay function is adopted. When the rain is raining, the relay is turned on and the system starts to work. After the data is measured, the relay cuts off the power of all the slaves after one hour delay to save power and reduce power consumption.
5 data collector adopts ARM control system, adopts 8M bytes of FLASH memory, can store large amount of data, and uses ferroelectric SPI data memory as the number of stored data, which is convenient to save real-time data of the system and ensure data is not lost. The ferroelectric memory has no life limit, thus ensuring the correctness of the number of records. The SD card can be expanded externally, which can greatly increase the data capacity. Do not repeat erasing can reach 1 billion pieces of data.
6 data collector can send data through RS232, RS484, GPRS. In this system, the data collector sends data to the Puyang or Changzhou server via GPRS, which is convenient for querying and viewing information in real time.
The 7 data collector is powered by 30W solar energy. Through the large-capacity 80AH battery storage capacity, the system can guarantee normal operation for 30 days without the sun.
ã€Technical Parameters】
1. Composition: runoff sediment collection and measurement device, data acquisition control system, automatic rainfall recording device, photovoltaic power supply system, cloud data analysis and processing system, terminal control platform.
2. Technical parameters:
Maximum flow of inlet: ≤2.5L/S;
Sediment particle diameter: ≤ 20mm, sediment density is not limited;
Maximum measurement error allowed: ≤ ± 10%;
Simultaneous monitoring of the number of roads: ≤ 9 roads;
Data storage format: CSV
Measurement method: real-time, automatic
Collecting bucket volume: 250L
Software operating environment: Windos XP, Windos 7 and above
Power: AC 24V ± 10%, solar power system or 220 volts
Single power: 10W
Data acquisition interval: 20s-99s adjustable
Data acquisition methods: SD card storage and cloud server remote download.
ã€Instructions】
1. Since the system is an unattended fully automated measurement system, in the actual operation process, it is not necessary to manually monitor the measurement data, and only needs to be viewed according to the data on the server. To ensure stable and reliable operation of the system, Need to do the following:
A. Ensure that the accessory equipment of the runoff field is in good condition and can work normally and operate normally;
B. Ensure that the server system works reliably throughout the day;
C. Ensure that the sim card in the DTU module can work reliably, that is, there is always a fee;
Second, the server system and the field unit communicate once every hour to confirm the reliability of the system, whether the sim card has a fee, and then confirm whether the relative time is accurate.
The user can confirm whether the system is reliable and reliable according to whether the communication is successful, and whether it can confirm whether the sim card in the system is down.
JZ-NB1700 large watershed soil erosion online monitor equipment configuration list
No. Product Name Model Configuration Details Total Quantity (yuan)
1 Data collector JZ-NB1700 7-inch wide temperature full color touch screen; automatic data storage, setting screen parameters, data display, data transmission, data export, etc.; with ambient temperature and humidity sensor 1
2 Collector box JZ-NB1700 500*500*1000 Standard stainless steel header tank, maximum water storage capacity: 250L 1
3 Control box JZ-NB1700 300*400*150 Standard control box (protective box) 2
4 mechanical level sensor 12V maximum and minimum water level monitoring and sampling bottle level monitoring 1
5 Input level sensor JZ-Y12 is used to measure the water level in the header tank 1
6 electric butterfly valve DN110 fast butterfly valve 1
7 electric control valve DN20 water sample output control 3
8 sample bottle ABS-1L 1000ml standard graduated measuring cup 3
9 Gravity sensor ZH-L3 500Kg industrial grade gravity sensor 1
10 Soil and Water Loss Monitoring Controller JZ-NB1700 Processor: 32-bit industrial grade processor
Signal output: RS-485
Level range: 0-10000mm Accuracy: ±1%
Flow range: 1-250L/min Accuracy: ±1%
Sailing range: 0-500g/L Accuracy: ±3%
Control output: 12-24V
1
11 GPRS module 730 three-network universal multi-mode GPRS module 1
12 monitor protection box stainless steel 700*600*1300 standard stainless steel protection box 1
13 bracket stainless steel collector protection box bracket 1
14 communication cable standard 1
15 Rain gauge JZ-YL
Measuring range: ≤ 4mm / min (precipitation intensity);
· Resolution: 0.2mm (6.28ml)
1
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