PRESSURE SENSOR

• Main Author: NISHIMURA ETSUO
• Format: Patent
• Language: English
• Published: 28.04.1994
• Edition: 5
• Subjects: MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PHYSICS; TESTING

PURPOSE:To enhance sealing performance by providing an orifice part and a large diameter part on the liquid introduction path to a sensor element thereby protecting the sensor against direct application of steep high frequency pulsating pressure. CONSTITUTION:A housing 11 is provided with an oil introduction path 12 having a small diameter orifice part 12a located on the leading end side and a large diameter part 12b contiguous thereto. A sensor element 14 for converting pressure into an electric signal is held on a holder 13 contained in the housing 11. The sensor element 14 comprises an element body 14a, and a pipe 14b for introducing oil through the introduction path 12 into the element body 14a. Since oil is introduced through the introduction path 12 and the pressure introduction path 14b into the element body 14a, oil pressure is applied on a pressure receiving diaphragm and detected in the form of electric signal. A steep high frequency pulsating pressure is generated at that time, but high frequency pulsating components pass through the orifice part 12a and the large diameter part 12b and attenuated. Since high frequency pulsating components are prevented from being applied directly on the sensor part, sealing performance is improved.