NB-IoT ultrasonic gas meter is an all-electronic gas measuring instrument with prepaid function, which is composed of ultrasonic measuring technology, electronic controller and NB communication module.
◆ In-depth cooperation with the world's top ultrasonic chip supplier, ams, to integrate the core measurement algorithm firmware that integrates independent intellectual property rights into the chip.
◆According to the characteristics of gas metering, the firmware strategy of ultrasonic metering chip is greatly optimized, and a measurement scheme of “exclusive, adaptive, high sampling rate, high precision, low power consumption” is formed.
◆ Jointly released the “iESlab&ams” brand ultrasonic gas metering module with ams.
◆According to the characteristics of ultrasonic measurement, the company developed a matching calibration table to achieve high-speed modeling and efficient calibration/verification.
◆ Research on physical mechanisms such as electronics, materials, acoustics, and fluid mechanics to ensure the correctness of the theoretical foundation.
◆ Metering chip firmware algorithm is designed independently, which realizes signal propagation adaptive (adaptive excitation frequency, PGA automatic adjustment, adaptive temperament, temperature, pressure change).
◆ Independent research and development of the production of gas medium transducers, achieving good acoustic matching, low voltage excitation, low power consumption.
◆ Simulation and optimization design of sound path and flow channel.
The main function:
◆Using time difference method for ultrasonic measurement
◆ Use the special Internet of Things card to communicate data through NB-IoT (narrowband Internet of Things).
◆ It has three working modes: timed upload, manual upload, and abnormal event upload. The upload has a wrong peak mechanism.
◆ Online configuration parameters and local infrared communication interface.
◆With pre-paid function, it can realize remote recharge payment.
◆ With abnormal alarm management functions, including gas abnormal alarm, power abnormal alarm, communication abnormal alarm.
◆It adopts external 4 section 5 alkaline battery and built-in lithium battery power supply.
◆The meter end can display information such as temperature, pressure, gas volume, remaining amount, gas unit price, valve status, battery power, etc.
◆ The gas meter hardware program can be updated by remote online.
◆Flow range: household meter G1.6-G4, industry commerce meter G6-G25
◆ Temperature range: -15 ° C ~ 45 ° C
◆ Pressure range: 60kPa-150kPa
◆Metric output: temperature, pressure, working condition flow, standard condition flow
◆R value: household meter module 250, industry commerce meter module 400
◆ Built-in flow model, you can use Qingdao iESLab Electronic's ultrasonic gas calibration table to calibrate different phenotypes of users.
◆ Built-in ultrasonic signal strength automatic adjustment algorithm, effectively adapt to temperament and pressure changes.
◆Power consumption: less than 50uA when the sampling frequency is 4Hz