Patent ID: 11480485

Abstract:
Measurement with satisfactory sensitivity in a low-pressure range, and accurate measurement in a wider pressure range, are realized by a pressure sensor that includes a diaphragm layer and a pressure receiving region formed on the diaphragm layer. The pressure sensor includes a first piezostrictive element, a second piezostrictive element, a third piezostrictive element, and a fourth piezostrictive element. In addition, the pressure sensor includes a first magnetostrictive element, a second magnetostrictive element, a third magnetostrictive element, and a fourth magnetostrictive element. A switching function unit outputs a pressure value calculated by a second calculation function unit until a pressure value calculated by a first calculation function unit exceeds a set threshold value, and outputs the pressure value calculated by the first calculation function unit when the pressure value calculated by the first calculation function unit exceeds the threshold value.