Low-power wireless remote transmission smart gas meter NB-IOT communication transmission control module remote meter reading

1. Market demand



Ordinary household gas meters, due to the difficulty of charging, the high labor cost of meter readers, and the inability to truly monitor the stolen gas, have continuously increased operating costs for gas companies and brought a lot of trouble to operation and management.

At present, the market size of smart gas meters has exceeded RMB 8 billion, with a growth rate of 25%. At present, there are more than 100 million online gas meters in China, of which more than 50 million smart gas meters, and the market penetration rate accounts for about 50% of gas households. In the past five years, the output of smart gas meters has grown rapidly at a rate of about 25%. It produces 20 million units, and the number of new users of smart gas meters accounts for about 60% of the number of new users of gas meters. With the popularity of gas and the improvement of gas operation and management level of gas companies, the base and proportion of smart gas meters will rise steadily. According to estimates that 60% of households in China will use natural gas in the future, the overall market space for smart gas meters is expected to reach 60 billion yuan in the future.



2. Product introduction:

The wireless remote transmission smart gas meter NB-IOT data transmission control board developed by our company is mainly suitable for the terminal application of the remote meter reading system of various gas meter manufacturers. The main chip of the module adopts a high-performance embedded ARM Cortex-M3 32-bit RISC controller. Software multi-level detection and hardware multiple protection mechanisms ensure equipment stability.



It is composed of powerful ARM Cortex-M3 32-bit RISC chip single-chip microcomputer and NB-IOT wireless spread spectrum chip, the module has no magnetic induction, the main voltage acquisition circuit and the gas meter acquisition circuit. The realization of each function is based on the standards that have been formed in the industry for many years. In the gas meter collection circuit, the collection methods such as photoelectric direct reading collection and wireless pulse collection can be set to connect, and there are strong magnetic interference protection, man-made damage alarm, and low voltage alarm. , Data storage and other functions. People's livelihood projects such as smart cities and smart gas services can be easily realized.



Applied to smart gas meters can achieve:



1. Unattended, reducing manpower

2. Automatic meter reading

3. Industrial-grade communication equipment guarantees safe and reliable meter reading

4. It can provide complete system log traceability

5. Visual graphics, data statistics

6. Meter status alarm; when there is low power, low volume, magnetic attack, sampling failure, leakage alarm (external leakage alarm), the alarm information will be uploaded to the background application platform in real time.

7. Control the gas meter valve switch through the background application software (desktop, WEB and mobile APP)

8. When the meter is removed or attacked by external forces, the information will be uploaded to the background application platform in real time.

9. It can monitor the stability of equipment data transmission

3. Product advantages:



The wireless meter reading construction is very simple, the system is easy to maintain, and the fault is easy to find

The application of wireless meter reading provides new ideas for the intelligent and remote meter reading of gas meters, gas meters, and heat meters.

The NB-IOT module adopts LGA package, the module size is small, the structure is compact, and it is easy to be applied in embedded products.

Integrate TCP/UDP and other data transmission protocols and embedded rich network service protocols, easy to product design and upgrade



4. Technical parameters:



Type Description
Package LCC
Dimensions (length * width * height) 19 mm *20.9 mm *2.7 mm
Working frequency band NB-IOT: Band 3/Band 5/Band 8
GPRS: Band 2/Band 3/Band 8
Data service NB-IOT: UL 158 Kbit/s; DL 126 Kbit/s
GPRS: UL 85.6 Kbit/s; DL
Maximum transmit power Class 4 (33±2dBm) for GSM900
Class 1 (30±2dBm) for DCS1800
Class 3 (23dBm±2dB) for NB-IOT
Power consumption Current in Deep Sleep mode: 3.7uA
Working temperature -40℃ ~ 85℃
Storage temperature -40℃ ~ 95℃
Operating voltage range DC 3.4V ~ 4.2V (typical value 3.8V)

5. Instructions for use:

The meter module can be modified through the upper computer software of our company, or modified through the customer's meter reading tool (for details, please call or contact us online for guidance)

(1) Tool preparation

1. A wireless module.

2. A computer with serial port or USB to serial port.

3. An intelligent remote gas meter is used to set the parameters of the meter.

4. Meter reading software, module setting software (IoT smart energy consumption management and control platform).

(2) Operation steps

1. Use the RS232 converter to connect the computer serial port to the module;

2. Power on the gas meter module, connect the gas meter to the test gas flow, and place the LED light on the gas meter module to keep the LED light on so that the module enters the configuration mode;

3. Open the gas meter setting software and click the "Enter Configuration Mode" button of the setting software;

4. Use the RS232 converter to connect the computer serial port to the module;

5. Configure the corresponding parameters according to the meter module, and click the "write" button;

6. When the word "Normal" appears in the status bar, it indicates that the module parameters have been set, and then click "Exit" to set the mode.



Six, application cases

Industry Classification: Communication Broadcasting

Development platform: STM STMicroelectronics

Delivery form: PCBA

Performance parameters: Package LCC size (length * width * height) 19 mm *20.9 mm *2.7 mm Working frequency band NB-IOT: Band 3/Band 5/Band 8 GPRS: Band 2/Band 3/Band 8

Application scenario: Household use, gas company.