Pressure sensors are crucial and found in all aspects of society. For example, excavators, powerful tools in the construction industry, are equipped with pressure sensors, known as excavator pressure sensors. So, what is an excavator pressure sensor? What is its function?
As a type of pressure sensor, the excavator pressure sensor is discussed below. A pressure sensor is a device that senses pressure signals and converts them into electrical signals that can be output according to certain rules. Pressure sensors generally consist of a pressure-sensitive element and a signal processing unit. Depending on the type of test, pressure sensors can be classified into gauge pressure sensors, differential pressure sensors, and absolute pressure sensors.
Pressure sensors are among the most widely used sensors in industrial practice, with the broadest application range. They are frequently used in various industrial automation environments, including water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemicals, oil wells, power, shipbuilding, machine tools, pipelines, and many other fields. Below, we will examine some commonly used sensors and their principles and applications.
The function of excavator pressure sensor
Excavator pressure sensors are among the most widely used sensors. They are a general term for detecting the energy of the forces between all substances, including gases, liquids, and solids. This includes pressure gauges that measure pressures above atmospheric pressure and vacuum gauges that measure pressures below atmospheric pressure. There are many types of force sensors. Traditional measurement methods use the deformation and displacement of elastic elements, but these are large, bulky, and have non-linear outputs.
With the development of microelectronics technology, semiconductor force sensors have been developed by utilizing the piezoresistive effect and superior elasticity of semiconductor materials. These sensors primarily come in two types: silicon piezoresistive and capacitive. They possess advantages such as small size, light weight, and high sensitivity, leading to their widespread application. When stress is applied to a semiconductor in a certain crystal direction, its resistivity will undergo a certain change.
The relationship between this change in conductor resistivity and stress is called the semiconductor piezoresistive effect. Mechanical sensors made using this effect are called piezoresistive force sensors. There are two types: one type consists of a semiconductor strain gauge mounted on an elastic element, called a mounted piezoresistive sensor; the other type uses integrated circuit technology to fabricate a diffused resistor on a semiconductor substrate, making the strain gauge and silicon substrate a single unit, called a diffused piezoresistive sensor. These sensors feature high sensitivity, high accuracy, small size, light weight, high operating frequency, simple structure, reliable operation, and long lifespan.
