Pressure sensors are among the most widely used types of sensors. Traditional pressure sensors are primarily mechanical devices that indicate pressure through the deformation of elastic elements. However, this type of structure is large, heavy, and cannot provide electrical output. With the development of semiconductor technology, semiconductor pressure sensors have emerged. Their characteristics include small size, light weight, high accuracy, and good temperature characteristics. Especially with the development of MEMS technology, semiconductor sensors are becoming increasingly miniaturized, and their power consumption and reliability are also improving.
What are the functions of a pressure sensor?
Pressure sensors are among the most commonly used sensors in industrial practice, widely applied in various industrial automation environments, including water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, petrochemicals, oil wells, power, shipbuilding, machine tools, pipelines, and many other industries. Below is a brief introduction to the principles and applications of some commonly used sensors. Medical pressure sensors are also available.
A more intuitive use case;
1. Directly used for measuring various pressures: air pressure, water pressure, hydraulic pressure (including water pressure), and various blood pressure measurements in daily life;
2. Pressure sensors are used in automobiles, some high-end motorcycles, and almost all internal combustion engines;
3. Level gauges: Most field instruments used for measuring liquid levels are also pressure sensors;
4. The weighing signal for most electronic weighing scales and truck scales also comes from pressure sensors.
5. Pressure sensors are also used for acceleration measurement in aviation and aerospace.
1. Weighing system
Pressure sensing technology is increasingly being used in commercial weighing systems for industrial control. In many pressure control processes, it is frequently necessary to collect pressure signals and convert them into electrical signals suitable for automated control. Pressure control devices made with pressure sensors are generally called electronic weighing systems. Electronic weighing systems are becoming increasingly important as online control tools for material flow in various industrial processes. They can be integrated into product manufacturing processes to optimize production and improve product quality, and they can also collect data on material flow during production and transmit it to a data processing center for online inventory control and financial settlement.
2. Petrochemical industry
Pressure sensors are among the most widely used measuring devices in the automatic control systems of the petrochemical industry. Large-scale chemical projects encompass almost all applications of pressure sensors: differential pressure, absolute pressure, gauge pressure, high pressure, micro differential pressure, high temperature, low temperature, and remote flange-type pressure sensors made of various materials and with special processing. The petrochemical industry's requirements for pressure sensors primarily focus on three aspects: reliability, stability, and high accuracy. Reliability, along with many additional requirements such as range ratio and bus type, depends on the transmitter's structural design, machining technology, and structural materials. The stability and high accuracy of the pressure transmitter are mainly guaranteed by the stability and measurement accuracy of the pressure sensor itself.
3. Environmental protection
my country's environmental water treatment industry has experienced rapid development in recent years and has a promising future. Pressure sensors are crucial for system protection and quality assurance in water supply and wastewater treatment processes.
4. Medical Industry
With the development of the medical device market, higher requirements are being placed on the use of pressure sensors in the medical industry, such as improvements in accuracy, reliability, stability, and size. Pressure sensors have good applications in minimally invasive catheter ablation and body temperature measurement.
Currently, pressure sensors are primarily used for control and monitoring in specific applications. In the automotive sector, MEMS pressure sensors are mainly used to measure fuel pressure, tire pressure, airbag pressure, and pipeline pressure; in the biomedical sector, MEMS pressure sensors are mainly used in diagnostic and detection systems; in the aerospace sector, MEMS pressure sensors are mainly used to control spacecraft and their attitude; in the industrial sector, MEMS pressure sensors primarily require high accuracy, low power consumption, and high reliability; in the consumer electronics sector, MEMS sensors are used in applications such as motion/fall detection, navigation data compensation, and gaming/human-machine interfaces. The automotive industry is the most traditional and largest market for MEMS pressure sensors.
