Pressure sensor and pressure sensing method

Abstract

A pressure sensing method is used for sensing pressure of a pressure source, and includes the steps: guiding the pressure of the pressure source to drive a magnetic piece for generating magnetic force to be close to or away from a coil made of conducting materials, then, enabling the coil to generate corresponding induction electromotive force by the aid of magnetic force changes during moving of the magnetic piece, and finally, utilizing the induction electromotive force to obtain a pressure change value of the pressure force by means of computing. In addition, the invention further discloses a pressure sensor using the method to achieve pressure sensing.

Description

technical field [0001] The present invention is related to a sensing device, and more specifically refers to a pressure sensing device and a sensing method thereof. Background technique [0002] Generally speaking, the industry usually uses pressure sensing devices such as U-tube manometers or Bourdon-tube gages to measure pressures such as tire pressure, air pressure, and water pressure. [0003] The above-mentioned U-shaped tube pressure gauge usually uses water or mercury as the standard liquid in the tube; when the two ends of the U-shaped tube are not pressurized, the liquid levels of the two tubes are on the same level. If there is a pressure difference between the two ends, there will be a difference in the height of the liquid column between the two tubes. The height difference of the liquid column can properly represent the pressure difference between the two ends of the U-shaped tube to measure the pressure of the pressure source. [0004] see also figure 1 The B...

AI Technical Summary

Problems solved by technology

[0007] However, although the above-mentioned piezoelectric pressure sensing device can improve the shortcomings of known pressure sensing devices such as low accuracy and susceptibility to temperature, the piezoelectric pressure sensing device directly applies pressure to the piezoelectric pressure source through a pressure source. material, after a period of use, the piezoelectric pressure sensing device is prone to rust, moisture or damage

In addition, in order to avoid the danger of electrical ignition, the piezoelectric pressure sensing device is not suitable for pressure measurement of flammable gases, so that the measurable range of the piezoelectric pressure sensing device is limited. limit

Therefore, based on the above, it can be known that the known pressure sensing device and the sensing method used therefor are still not perfect, and still need to be improved.

Images