The Situation and Developing Trend of Stress Sensor
Sensor technology is one of the key technologies of modern measurement and automation systems. From development of the universe to Harbor Quest and the production process control to modern civilized life, almost every technology is inseparable from the sensor. Therefore, many countries attach great importance to the development of sensor technology, such as Japan, the sensor technology as one of the six core technology (computer, communications, lasers, semiconductors, superconductors and sensors). In various sensors, the pressure sensor which has advantages of Small size, light weight, high sensitivity, reliable, low cost, ease of integration, can be used in pressure, altitude, acceleration, fluid flow, flow, level, pressure measurement and control. In addition, it is widely used in water conservancy, geology, meteorology, chemistry, health, etc. Because the technology is the combination of three-dimensional graphic processing technology and easy integration, it can be used to make blood pressure, anemometer, water velocity meter, pressure gauges, electronic scales and automatic alarm devices, etc. In the various types of sensors, the pressure sensors has become the most mature and most stable performance, cost-effective class sensor. So for measurement and automatic control in the modern professional and technical personnel must understand and be familiar with domestic and international pressure sensor status and development trends.
From a global perspective, the development trend of the pressure sensor has the following main directions:
- Fiber optic pressure sensor
- Capacitive pressure sensor vacuum
- High-temperature pressure sensors
- Silicon micro machined sensor
- Self-test function of pressure sensors
- Multi-axis force sensor
Pressure sensors in today’s world have a wide range of research areas, which almost into all walks of life, we can summarize in the following trends:
Small market for smaller growing demand of pressure sensors, this small sensor can work in extreme environments, and requires very little maintenance and repair, and the impact on the surrounding environment is also very small. It can be placed in various vital organs in the human body to collect data, and do not affect people’s normal life, such as the U.S. company Entrant range of 2 ~ 500PSI sensor, diameter of only 1.27mm, the blood vessels in the body can be placed in the flow of blood which will not have a big impact.
Integrated pressure sensor has been more and more integrated with other sensors to measure the formation of measurement and control systems. Integrated system in process control and factory automation can increase the operating speed and efficiency.
Since the emergence of integration, intelligent in some of the microprocessor integrated circuit can be added, making the sensor with automatic compensation, communication, self-diagnosis, logic functions.
Another trend of a wide range of pressure sensors is moving from the machinery industry expanded to other areas, such as automotive components, medical equipment and energy and environmental control systems.
A standardized design and manufacture of sensor has formed a certain industry standards, such as ISO international quality system; U.S. ANSI, ASTM standards, Russia’s OCT, Japan’s JIS standard.
With the progress of silicon, micro-machining technology, super-integrated circuit technology and fabrication and properties, the pressure sensor in the mass production of fiber-optic sensors, high temperature silicon piezoresistive and piezoelectric sensor applications possible results in the biomedical, micro-mechanical fields, has a wide range of applications.