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Force is the direct cause of the change in the movement of matter. Force sensors can detect mechanical quantities such as tension, pull, pressure, weight, torque, internal stress and strain. Force sensors usually consist of a sensitive element and a conversion element. They are devices or equipment that can sense the specified measurement data and convert them into usable signals according to certain rules.

Force sensors have been widely used in this new era and are currently widely used in the industrial field. To use force sensors well, you need to have a certain understanding of the definition and function of force sensors. So, what are force sensors? What are their types? Let's learn about it together! There are many types of force sensors. According to different physical effects and detection principles, they can be divided into resistive strain sensors, piezomagnetic sensors and piezoelectric sensors.

1. Strain force sensors. Strain force sensors are widely used among all force sensors. It has high measurement accuracy and can measure dynamic and static forces from small to large. Its usage accounts for about 90% of the total force sensors. The working principle of the strain force sensor is basically the same as that of the strain pressure sensor. It is also composed of an elastic sensitive element and a strain gauge attached to it. The strain force sensor first converts the measured force into the strain of the elastic element, and then uses the resistance strain effect to measure the strain, thereby reading the output.

2. Piezoelectric force sensor. When a ferromagnetic material is subjected to external tension and compression and generates force inside, its magnetic permeability changes with the magnitude and direction of the stress: when the tension acts, the magnetic permeability increases in the direction of the force, and decreases slightly in the direction perpendicular to the force, and the change of magnetic permeability under pressure is just the opposite. This physical phenomenon is the piezomagnetic effect of ferromagnetic materials, which can be used to measure force.

3. Piezoelectric sensor. Piezoelectric sensors can measure various dynamic forces, mechanical shocks and vibrations, and are widely used in acoustics, medicine, mechanics, and navigation. They have the characteristics of small size, light weight, high response, and high signal-to-exposure ratio. According to the shape, weighing sensors can be divided into cantilever weight sensors, 5-shaped sensors, plate weighing sensors, box-type sensors, spoke-type sensors, etc. Force sensors have penetrated into a wide range of fields, such as resource surveys, ocean exploration, space development, industrial production, environmental protection, medical diagnosis, bioengineering, and even cultural relics protection. Force sensors have long penetrated into a wide range of fields, such as resource surveys, ocean exploration, space development, industrial production, environmental protection, medical clinics, bioengineering, and even cultural relics protection. It is no exaggeration to say that almost every modern project, from the vast sky to the vast ocean, to various complex engineering systems, cannot be separated from various force sensors.