Cell-Net
可靠的双向移动终端调制解调器，设置简单
Cell-Net 是一种使用简便的移动终端遥测技术解决方案，用于新的或现有远程监测站。Cell-Net提供基于web的实用配置工具，安装简单，将远程数据转发至任何终端的配置都很简单。传统典型的移动终端功耗持续较高。与之不同的是，Cell-Net即使是几乎完全在超低功耗模式下运行，也能提供双向通信，最大可能的完善数据传输。
- 配置简单，适用于实地勘察费用昂贵的远程站点
- 与典型的移动终端遥测技术相比，功耗改善将近20倍
- 通过FTP、HTTP协议（或两个同时进行）或IP协议进行数据传输
- 智能化的数据管理、数据缓存、网络验证，确保重要数据传输成功
- 可选择移动终端运营商
- 时间、经度、纬度的完整定位
- 适用于任何应用，可对任何参数进行监测
- 直接连接至云端：通过标准RS-232串口为数据采集器和智能传感器提供直接IP连接。无需其它接口硬件
- 可靠性：Cell-Net通过移动终端网络和HTTP服务器连接在数据发送之前进行连接验证。若无连接或数据接收未被确认，数据将保存并设置下一次发送
- 配置简单：通过web门户网站进行配置，或连接至PC机使用Windows自带程序进行配置。无需定制程序或脚本
- 智能电源管理：Cell-Net的显著特征是可在超低功耗模式下运行，空闲模式下耗电量仅为1.6mA（低于传统移动终端耗电量的1%）。进行数据传输时，功耗与其它调制解调器相差较小，但仅限于用户控制传输间隔时非常短的时间内
- 数据管理：Cell-Net会监听连接的数据采集器或智能传感器的数据，数据传输之前在缓冲区接收数据。一旦数据接收完成，可立即进行数据传输，也可在缓冲区数据达到预设大小之后进行数据传输，或根据用户设定的传输间隔进行传输
- 数据冗余：数据传输针对当前报告周期及前次报告周期
- 预测和预防问题：每一次传输过程中，除了内部诊断，还包括站点与传输健康及性能数据
Up to 20x better power efficiency vs. typical cellular modems.
The key to the extreme power efficiency of Cell-Net is its “hybrid” approach to 2-way communications. Not only does it consume less power than typical cell modems when in standard 2-way communications mode, but it also offers an ultra-low power mode that sacrifices some responsiveness in two-way connectivity for an extremely low power consumption that makes it suitable for remote stations monitoring critical data.
Cell-Net
Typical cellular modems
Power consumption at idle
150 mA
220 mA
Power consumption at idle
1.6 mA
N/A
Dead simple setup and configuration.
Anytime, anywhere, any device.
All configuration and programming of the remote Cell-Net is done online via the cloud-based Stevens-Connect. Setup in 3 steps:
1
Connect to data logger
2
Connect to power source
3
Configure data handling (frequency, redundancy, destination) with a simple online GUI
技术参数
Current consumption |
|
|---|---|
|
Listen/trigger mode/idle |
1.6 mA |
|
Data receive/store/prepare for transmission |
150 mA |
|
Data transmit |
250 mA |
Power |
|
|
Input voltage |
10 to 18 VDC |
|
TX output power |
24.3 dBm (270 mW) |
Physical |
|
|
Dimensions |
1 3/8” (3.5 cm) x 5 1/8” (13 cm) x 3 3/4” (9.7 cm) |
|
Weight |
10.78 oz (305.6 g) |
Environmental |
|
|
Operating temperature |
-30°C to 65°C (SIM Card selection may limit this range for GSM version) |
|
Storage temperature |
-40°C to 85°C (SIM Card selection may limit this range for GSM version) |
LEDs |
|
|
Power |
Indicates power to the unit |
|
GPS |
Indicates if GPS does not have location fix |
|
Cell |
Indicates if there is a connection to the tower |
|
BIST |
Built-in self test |
Ports |
|
|
Communication with data logger/smart sensors |
RS-232 |
|
Communication with PC |
USB B |
|
Cellular antenna |
SMA |
|
GPS antenna |
SMA |
Included |
|
|
Power cable with flying leads, dipole dual-band cellular 800/1900 MHz antenna, USB cable. |
Stevens Water Monitoring Systems, Inc. | Portland, OR, USA
Commands can be sent remotely through a web interface to switch Cell-Net into full 2-way communication mode. When it's not in full 2-way mode, the command will be received during the next scheduled transmittal of data (each time data is sent from the remote site, Cell-Net also downloads any new configuration files—the new configuration would contain the command to switch to 2-way mode). In full 2-way mode, the modem is "on-line" and actively listening for commands, and can respond immediately when commands are sent. Power consumption is higher at idle however (150 mA). A new configuration file will also deliver the command to switch back to ultra-low power mode.
Typical cellular modems are always in full 2-way communicate mode, and is always "on-line" and actively listening for commands, responding immediately when commands are sent. Power consumption is always high (220 mA at idle) however, which is why cellular has traditionally not been a practical option for very remote sites that monitor critical data.
When in ultra low-power mode, new data that is received from an attached data logger or smart sensor is buffered in internal memory and transmitted when:
- the next interval of a pre-defined schedule occurs
- immediately, if Cell-Net has been programmed to transmit data when it receives specific data from the attached data logger or smart sensor (this is called "triggered" data). Users also have control over a delay period after the data is received from the logger but before it is transmitted, to account for variable length pauses from different sensors.
In ultra-low power mode, each time data is transmitted Cell-Net will check for a new configuration (that has been created via a web-based interface). Since data is transmitted only when a scheduled interval occurs or if it has been programmed to send when it receives new data (triggered data), new configurations are not able to be downloaded as soon as they are sent.