Environmental Monitoring Solutions
        Environmental monitoring department as the technical department of the State Environmental Protection system, which is important basis for environmental management. With the public's environmental awareness, more and more people began to care about the quality of the environment is good or bad, requires transparency in environmental protection work; higher authorities also need a large number and variety, to update the information fast. All of this, the environmental monitoring department should pay attention to the problem: how to establish a practical, wide coverage, flexibility and good environmental data acquisition system, to meet the needs of environmental monitoring information.

Environmental protection system, often need real-time monitoring of pollution discharge point; most of the monitoring data need to be sent in real time to the management center of the back-end server for processing. The monitoring point spread, wide distribution, and most of them set in the environment worse area, through telephone lines to transmit data are often less effective. GPRS wireless network for data transmission, to become one of the means of communication chosen by the environmental protection department. Sources of pollution monitoring equipment can be collected pollution data and alarm information through the GPRS network timely sent to the environmental monitoring department, timely management of sewage units or individuals, can greatly improve the work efficiency of the environmental protection department.

ET8611 GPRS/SMS FAM (Fixed Asset Monitoring) is an enhanced GPRS/SMS messenger (GPRS or CDMA service optional) which integrated with I/O port, RTU (Remote Terminal Unit), Relay, Sensor functions, it has more I/O ports than ET8610, which can help people to monitoring,  control,SMS alarm the remote devices.

eTel FAM cloud management platform is based on current demand for centralized monitoring and management of GPRSFAM to developed centralized management platform, the system provide remote data acquisition, remote control .It make all the FAM, user equipment and sensorsfully integrated, centralized monitoring and management, and it can display the operational status of each device, alarm information, current sensor status, maximizing user-friendly remote control device.

eTelFAM management platform let users just monitor all the FAM in the control centers, the system show FAM location on GOOGLE map, if there is alarm happen, the system will immediately locate FAM on GOOGLE map, and show red color logo flash and alarm content on FAM. It’s user-friendly, fast and accurate processing of alarm status.

FAM cloud management platform supports both C/S (Client/Server) and B/S (Browser/Server, Web-based) structure; users can simultaneously through the PC, MID, cellphone to access.

Data Monitoring Centre (C/S):

Base on windows PC, through client software Famer, direct access to the data center server, 7 * 24-hour run. Support FAM remote control, parameter setting, status query, remote photograph, LED issue, Add/Remove FAM, add/delete users, user authorization, statistics report etc., it's suitable for data monitoring center.

User PC (B/S):

User PC is able to directly through any browser to access the cloud management platform WEB address, remote query/the control the belongs FAM. Support FAM remote control, parameter setting, status query, remote photograph, LED issue, Add/Remove FAM, add/delete users, user authorization, statistics report etc., also we can use Famer client software (C/S) direct access to the data center.

Tablet PC and mobile phone (B/S):
Users of tablet PCs and mobile phones (including IOS and Android system), can be directly through any browser to access cloud systems management platform web address, remotely query/control belongs FAM. Support FAM remote control, parameter setting, status query, remote photograph, LED issue, Add/Remove FAM, add/delete users, user authorization, statistics report etc.,it’s suitable for end-user control belongs FAM at any time.

 

1. General

The province has Environmental Monitoring Station of the 16 cities and counties stations into the provincial monitoring network of 102 environmental monitoring stations in more than three, the monitoring object is industrial "three wastes" discharge and treatment and atmospheric environment , water environment, noise environment. Include: monitoring the ambient air quality status of the 14 cities, 12 major river systems, the seven major lakes and reservoirs, seven inshore Harbor and 16 urban drinking water source water quality status quo, nine of the city's noise pollution, and through an integrated Index and other methods for trend analysis, and finally arrive at conclusions on Environmental Quality.

The provincial environmental data acquisition system is composed of source emissions monitoring points and monitoring centers pollution sources monitoring system. The system can be the source of pollution automatic sampling, online monitoring of pollution factors; master urban sources of pollution emissions and pollutant emissions and total monitoring data is automatically transmitted to the Provincial Environmental Protection Monitoring Center; monitoring center computer data aggregation, organization and synthesis analysis; monitoring information transmitted to the Provincial Environmental Protection Bureau, the provincial Environmental Protection Bureau supervision and management of pollution sources.

At present, the various sources of pollution emission monitoring point sources of pollution monitor installed the monitoring of pollution sources. The monitoring center receives the monitoring point transmission of monitoring information; classification, filtering, and comprehensive analysis and is responsible for monitoring information. Provincial Environmental Protection Bureau as the decision-making center of the system, analyze the information obtained from the monitoring central station monitoring, research, management decisions in a timely manner, increasing the intensity of management.

At present, the provincial environmental monitoring station and the collection point data communication between the manual copying, or PSTN telephone lines for transmission. The use of telephone lines for transmission of data, due to the need to wait each time you dial up, slow, and costs are also higher. The same time, because each supervisor has a wide range of point distribution, quantity, distance, individual points remoteness and the need to apply a lot of telephone lines, and some monitoring points wire line difficult to reach.

GPRS has the speed, the use of low-cost, the transmission speed of up to 171.2kb / s. Compared to wired communications, using the GPRS wireless communication is very flexible, it has a flexible networking, easy expansion, the operating cost is low investment, easy maintenance, cost advantages, is considering the use of GPRS wireless transmission to solve the pollution source monitoring real-time data transmission problems.

2. Feature

China Mobile GPRS system provides wide-area wireless IP connection. The GPRS service platform in the mobile communications company to build environmental information collection and transmission system to achieve environmental protection information gathering can make full use of the existing network, shorten the construction period, lower construction costs and the advantages of wireless data transmission, and the device is easy to install, simple maintenance . After the comparative analysis, we chose China Mobile's GPRS system as environmental information collection and transmission system data communication platform.

GPRS wireless environmental pollution monitoring system has the following characteristics:

1) Real-time: comparison with the short message service, due to the characteristics of GPRS real-time online system without delay, without polling can be synchronized to receive a variety of data processing multiple / all monitoring points.

2) Each monitoring site equipment for remote control: two-way system through the GPRS can also reverse control equipment, such as: time correction, status report, switches and other control functions can be remote online upgrade of the system.

3) The construction cost is less: GPRS public network platform, there is no need to build a network, you can simply install equipment, low construction costs;

4) Wide range of monitoring: data communication covers a wide range of expansion unlimited, unrestricted access to sites, to meet the access needs of the mountains, towns and interregional build environmental information collection and transmission system. Due to the large number of environmental protection information gathering and distribution of a province-wide environmental information collection points are located in remote areas, and geographically dispersed.

5) It has a good scalability: the GSM / GPRS network has covered most areas of the province; basically there is no blind spot, a wide range of online monitoring, to meet the requirements of environmental information collection and transmission system coverage.

6) The transmission capacity of the system: environmental protection central station and each environmental protection information gathering real-time connection. Due to the large number of environmental protection information gathering, system requirements to meet the needs of the burst data transfer, GPRS technology can satisfy the needs of the transmission burst data.

7) High data transfer rate: each environmental protection information gathering time data transmission quantity of 10Kbps. The GPRS network transfer rate theoretically of up to 171.2kbit / GPRS data transfer rate of about 40Kbps, fully able to meet the needs of the system data transfer rate (≥ 10kbps).

8) Low cost of communication: the monthly billing, low maintain costs. 

2. Solution introduction

Due to GPRS communication is based on the IP address of the data packet communication network, the monitoring center host computer to configure a fixed IP address, each data collection point to communicate with ET8611/ET8610 GPRS / SMS FAM alarm control and monitoring center server.


1) Environmental protection information gathering:

Site monitoring point through the data acquisition module automatically collected information of pollution sources, connected via RS232 interface and GPRS transparent data transmission terminals, via GPRS transparent data transmission terminal built-in embedded processors for data processing, sent to the GSM network protocol encapsulation.

2) Monitoring center:

Server application to configure a fixed IP address, DDN special line provided by the provincial mobile communications company, with the GPRS network. DDN special line offers higher bandwidth, when the increase in the number of environmental protection information gathering, the center does not need to expand to meet demand. Monitoring center RADIUS server accepts the GPRS network transmits data after the first AAA authentication, sent after the host computer to the monitoring center, to restore the data displayed by the system software, and data processing.

GPRS / GSM mobile data transmission network:

Site monitoring point data collected by the GSM network air interface function module at the same time the data decoding process, and converted into a public network data transfer format, through the China Mobile's GPRS wireless data network transmission, and ultimately sent to the monitoring center IP address.

2. Function

Each station using GPRS transparent data transmission terminal, connected monitoring center via GPRS network. Each pollution source data collection points to use mobile communication company a unified SIM card, registration each station in monitoring center, save the relevant information in order to identify and maintenance processing. Various information gathering operation monitoring system software, support 24-hour real-time online information that 24 hours collected environmental information data.

Where authorized by the Environmental Protection Agency information collection points can use this system:

1) Environmental protection information gathering must use the the mobile operator unified SIM card, users only able to be used for data communication function with the environmental protection station.

2) Shenzhen eTel Technology Co., Ltd., ET8611 GPRS / SMS FAM alarm controller

3) User registration: compliance with the provisions of the provincial Environmental Protection Bureau.

Feature:

1) Provide device status lights to facilitate equipment maintenance;

2) Wide voltage supply range: 5V-30V;

3) With RS232, RS485;

4) Built-in high-capacity SPI-flash (optional capacity 1Mbit-64Mbit), long the machine to save data (to be customized);

5) 4 analog input acquisition accuracy: 12bit

6) Transmission support multiple protocols, custom protocol and Modbus protocol (ASCII, RTU, Modbus TCP) perfect support;

7) data transmission using GSM module can be realized:

A. GPRS auto-disconnect;

B. According to the needs of up to simultaneously connect six central server;

C. Support fixed IP, DNS and APN private network addressing modes;

D. Support TCP, UDP, PPP, ICMP, DNS, FTP and other protocols;

E. support the number of nodes, as long as the server resources allow, in theory, not limited to;

F. to reduce the cost of wiring and construction of trouble;

G. Support SMS data transmission, the SMS configuration parameters;

H. wake-up function support calls and text messages;

I. supports the special software for local and remote parameter configuration and maintenance;

J. supports local and remote firmware upgrade; 

3. Security

Due to the special nature of the environmental data acquisition system, the system requires a high degree of security and stability. From within and outside the security is to prevent intentional and unintentional destruction, network security measures including encryption of the channel source encryption, login protection, access protection, access protection, firewall. Stability means that the system be able to 7 × 24-hour operation, even if there is a hardware and software faults, the system cannot be interrupted run. Data center through the public network using VPN access to the mobile GPRS network, the VPN way cost is relatively low, companies do not have a leased line, you can also benefit the old use of the original VPN devices, mobile terminals need to install the second virtual dial VPN the software. Way through the VPN client to connect to the application server before, to go through the entire data transfer process of the Radius server authentication encryption protection, security is relatively high, fully safeguarded the speed and quality of network services. In addition, the data center can also be used APN access, leased line access to the mobile GGSN equipment, this high cost, safe, stable and reliable. For very high security requirements of the system can be considered on the basis of the dedicated APN access plus VPN access mode hybrid access mode, to further improve the security of the system.

1. VPN virtual private network mode: internal network configuration VPN server, the mobile terminal to load the second virtual dial VPN client software. VPN security technology, user access internal virtual private network with the Internet isolation, protected by encryption of the entire data transfer process, effectively prevent the illegal invasion.

2. with only SIM card to identify authorized users SIM card phone number, the network side, the SIM card number and APN binding, designate user access to a system range, only SIM card mobile phone belonging to the specified industry dedicated APN number to access the mobile terminal and data center with China Mobile assigned special APN Wi-Fi access, an ordinary mobile phone SIM card number cannot call a special APN.

3. for a particular user can be assigned by the data center specific user ID and password, and other data center assigned user ID and password the user will not be able to log into the system, the security of the system to further enhance.

4. data encryption: The entire data transfer process encrypted and protected through a VPN.

5. network access security mechanism: using firewall software, set the network authentication and security features to ensure system security.

4. Sum

Wired leased static IP is the relatively high cost of about 800 to 1500 yuan / month. GPRS wireless system traffic costs a flat-rate and the two charge according to the amount of data, flow calculation 0.01 yuan K flat rate of 5 yuan / month 30M flow, Provincial Environmental Protection Bureau to meet current environmental data acquisition system actual amount of data, it is estimated that its expense will be gradually reduced. For the Environmental Protection Agency and other users due to lower communication costs and enjoy the benefits. In addition, because the access device can be moved, when the removal of environmental observatories and environmental protection information gathering device can be moved and continue to use, can protect the user's original investment, suitable for the environmental characteristics of the collection.

    GPRS build environmental data acquisition system, not only can satisfy the demand of environmental information collection, and, as the network operator's mobile communications company will therefore get stable business group of users, with the number of users increases, the mobile communication company's revenue also increased, to mobilize the enthusiasm of the operators, in line with the requirements of the simultaneous development of network construction and network applications.