From the innovation of pressure sensor, see the intelligent transformation of urban gas system

In order to meet the needs of the new generation of gas meters, TE has developed a variety of pressure sensors to meet the needs of different scenarios. The SM9E is TE’s uncompensated SO-16 packaged low pressure sensor designed for natural gas flow measurement in smart residential gas meters and industrial gas flow meters. Features include uncompensated millivolt output, differential pressure output, vertical impulse tube construction, 0.15psi pressure range, variable supply voltage, built-in ESD protection, and natural gas resistance.

The topic of “energy” has received more and more attention in recent years, and in order to achieve more efficient and lower carbon energy consumption, the natural gas market is rapidly being sought after.

As a gas supplier, it is also making use of IoT and other technologies to continuously improve the operation mode of gas supply, and improve the digital transformation of the gas industry through more intelligent equipment, so as to continuously enhance the safety, reliability and convenience of the gas industry. , maintainability, etc.

The digital era is inseparable from the acquisition of data. Therefore, accurate and reliable sensors and meters are the first important hurdle in the intelligentization of urban gas systems.

The role of pressure sensor in gas system

In gas systems, pressure sensors are the most common and widely used sensors, and can be used in scenarios including gas meters, pipe network pressure monitoring, and gas correctors. The following sections will discuss the pressure sensors in these three scenarios in detail, and describe how the sensors will meet the upgrade requirements of the gas system.

Evolution trend of smart gas meters

First of all, for gas meters, according to data forecasts, with the increasing demand for IIoT and energy saving in the future, smart gas meters will gradually occupy the mainstream of the market, of which 80% of the market share will come from the replacement of traditional gas meters, and 20% will come from new installations. . The smart gas meter needs to have an accuracy error of less than 1.5%, a battery life of up to 15 years, an efficient IIoT module that supports remote reading, AMI network support, and safety and maintainability.

To this end, the gas meter is beginning to gradually transition from the traditional mechanical type to the design of the next-generation Electronic gas meter that uses line pressure and differential pressure to monitor the gas volume.

In order to meet the needs of the new generation of gas meters, TE has developed a variety of pressure sensors to meet the needs of different scenarios. The SM9E is TE’s uncompensated SO-16 packaged low pressure sensor designed for natural gas flow measurement in smart residential gas meters and industrial gas flow meters. Features include uncompensated millivolt output, differential pressure output, vertical impulse tube construction, 0.15psi pressure range, variable supply voltage, built-in ESD protection, and natural gas resistance.

In addition, the absolute pressure sensor MS5805 is also included for error compensation testing. The actual measurement value of the current mainstream membrane gas meter is different from the theoretical value, which is mainly caused by the error of pressure and temperature. On September 1, 2020, the China City Gas Association Group Standard T/CGAS 011-2020 “electronic Temperature and Pressure Correction Membrane Gas Meter” began to be implemented. With the help of electronic technology, electronic temperature sensor and pressure sensor are embedded in the base meter of membrane gas meter, and components such as totalizer are used to correct the volume accumulation under measurement conditions to the gas measurement instrument under standard conditions. . By revising the gas meter, the gas loss problem at the end of the pipe network is solved, thereby improving the management efficiency of the gas company.

From the innovation of pressure sensor, see the intelligent transformation of urban gas system

During the renovation of the urban gas pipeline network

In recent years, due to factors such as aging of the gas pipeline network, many vicious accidents have been caused. In order to further ensure the safety of the people and urban operations, the General Office of the State Council issued the “Implementation Plan for Aging and Renovation of Urban Gas Pipelines (2022-2025)” )”announcement of. The notice requires the simultaneous promotion of digital, networked and intelligent construction in the process of pipeline network transformation.

In the transformation of the urban gas pipeline network, the gas pressure regulating box / pressure regulating cabinet is an indispensable part. Its function is a complete set of pressure regulating equipment designed for regional pressure regulating stations, gas boilers, other special users or civil users in the urban gas transmission and distribution system. It usually has basic functions such as gas purification, gas pressure regulation, gas measurement, safety protection, etc. According to needs, various expandable functions can be added.

Because of the precise control and regulation of gas pressure, the most accurate air pressure sensor is required. At the same time, due to the different pressures of different pipelines, TE provides a variety of high, medium and low pressure sensors, which meet industrial-grade harsh environmental standards. These include the MS5805 for low pressure, the MS5803 for medium pressure and the MS5837 for high pressure. These small digital pressure sensors feature a 24-bit digital sensor, O-ring sealed design, self-calibration and compensation, wide supply voltage, multi-range design, and ultra-high resolution.

From the innovation of pressure sensor, see the intelligent transformation of urban gas system

Accurate Gas Volume Corrector

In addition to home gas meters that need to be corrected for gas volume, the industrial gas market also requires a large number of electronic volume correctors (EVCs), which are connected to various flow meters. The electronic volume corrector converts the gas volume measured by the mechanical gas meter into the specified standard volume. After collecting the parameters of uncorrected volume, pressure and temperature measured by the meter, the calibrated data is provided after calculation. .

TE’s TEI-19D module complies with the national standard GB/T36242-2018, which contains an ultra-stable piezoresistive silicon pressure sensor and an ultra-low power 24-bit ΔΣ ADC with internal factory calibration coefficients. Precise digital pressure values, temperature values ​​and different operating modes with pressure accuracy up to ±0.2%R are available, allowing users to optimize conversion speed and current consumption. Its high-resolution temperature output enables the function of a thermometer without the need for additional sensors. The communication protocol is the standard I2C interface, this module can be connected to almost any microcontroller, and has low power consumption and excellent EMC performance.

Each module is factory calibrated to offset offset and measure pressure and temperature signal ranges, eliminating the need for secondary calibration by EVC customers, reducing cost and maintenance.

And it is made of 316L stainless steel, which is corrosion-resistant and provides excellent performance and long-term stability in harsh industrial environments.

In addition, TE also provides rich and flexible localization support, including providing pressure core or sensor products with housing according to customer needs, and can adjust the output data format according to customer needs, and provide localized engineering support.

From the innovation of pressure sensor, see the intelligent transformation of urban gas system

The future of smart city gas systems

At present, my country’s gas system is ushering in an unprecedented period of change. How to achieve self-improvement under the wave of intelligence is a problem and pain point faced by all related companies.

For smart metering applications, TE sensor solutions can meet a wide range of measuring ranges and different signal conditioning requirements, so as to achieve excellent measurement and control performance of the equipment. TE offers a wide range of standard sensors that can be configured for a variety of specific applications. Special packaging requirements including meeting integrated custom cables and terminations. TE’s temperature and pressure sensors are used for flow correction of gas flowing from one point to another, and they meet two key parameters critical to successful measurements – high accuracy (TEB) and stability. Through intelligent, efficient and high-performance sensor solutions, we help gas customers to achieve rapid transformation from concept to product.

The Links:   VI-222-EW LTM170E4-L01