1、 System composition:

Power Module+Control Module+Data acquisition module+Communication module+Structural shell

Specifically, as follows:

Power module: composed of lithium batteries+The battery holder is responsible for providing power to the system;

Control module: responsible for the normal operation of power management and data acquisition of the entire system;

Data collection module: responsible for communicating with front-end devices and collecting data;

Communication module: responsible for transmitting the collected data to the upper platform and receiving simple instructions from the upper platform;

Structural shell: the load-bearing unit of the entire system, waterproof, corrosion-resistant, battery andSIMThe card is easy to replace.

2、 Working principle:

The control module is responsible for the normal operation of the entire system. After power on, the system initializes and enters sleep mode. It activates the system when it reaches the time to send data, collects data from online devices through the serial port, sends the collected data to the upper platform through SMS, and checks whether the instruction information sent by the upper platform is received. If not, it enters sleep mode again and waits for the next trigger.

In order to extend the working time of a single system as much as possible and reduce the frequency of battery replacement, the system spends most of its time in sleep mode. According to requirements, data can be sent to the upper platform several times a day. Using SMS to send data has the following advantages:

1It is not required that the upper end must be online in real time. After the SMS is sent, the upper end can be turned on at any time to receive data.

2Using SMS method, there is no requirement for a fixed upper endIP.

3Lower power consumption at the bottom and extend battery life.

4A few text messages per day at a low cost.

IIIExternal Interface

1Antenna interface（3Rice strip suction cup high gain antenna);

2、9Needle standardRS232Interface (receiving online data);

3Power switch;

4Specific parameters:

1Dimensions: cylindrical, diameter150pxLeft and right, high625pxabout;

2Single battery power supply working time:>12 months;

3PCB size: 110mm * 35mm

4Supply voltage: 3V

5Power consumption of the whole machine: standby mode current<5uA;

6Data collection method: RS485 or RS232;

7Data transmission method: GSM short message;

8Real time clock error: ≤ 0.04 ‰;

9Data transmission frequency: adjustable for 0.5, 1, 2, 3, 4, 6, 8, 12, 24, and 48 hours;

10. Equipment operating temperature: -20 ℃ to+60 ℃;

11. Relative humidity: 5% to 85% without condensation;