Force sensor is one of the four sensors supporting industrial process automation. Force-sensitive element refers to the element that can feel (or respond to) force in force-sensitive sensor. Force includes physical quantities such as gravity, tension, pressure, moment and compressive strength.

1.basic content

Force-sensitive elements and sensors are widely used in various industrial production departments and scientific experiments. There are many kinds and specifications of force-sensitive elements and sensors, which can be classified by different methods. The traditional method of measuring force is expressed by the deformation and displacement of elastic elements, which is characterized by low cost and no need of power supply, but it is bulky and bulky, and its output is non-electric. Later, strain gauges were discovered, especially with the development of microelectronics technology, semiconductor force and pressure sensors were developed by using the piezoresistive effect and elasticity of semiconductor materials and integrated circuit technology, which made great progress in this kind of sensors. The commonly used force sensors are resistive, piezoelectric, capacitive, variable reluctance, optical fiber and so on. In recent years, surface acoustic wave pressure sensor, magnetostrictive pressure sensor, potential pressure sensor and other electrical sensors have been developed.

The variable frequency power sensor samples the input voltage and current signals by alternating current, and then connects the sampled values with the digital input secondary instrument through transmission systems such as cables and optical fibers. The digital input secondary instrument calculates the sampled values of voltage and current, and can obtain parameters such as voltage effective value, current effective value, fundamental voltage, fundamental current, harmonic voltage, harmonic current, active power, fundamental power and harmonic power.

2.the variable frequency power sensor is suitable for power frequency electric quantity measurement and metering.

3. the variable frequency power sensor is suitable for the measurement and measurement of any electrical parameters within the bandwidth range.

Widely used in electric propulsion, motors, fans, pumps, wind power generation, rail transit, electric vehicles, frequency converters, special transformers, fluorescent lamps, LED lighting and other fields of product inspection and testing, energy efficiency evaluation and power quality analysis.