PRESSURE SENSOR
To provide a pressure sensor capable of suppressing influence of heat to accurately sense pressure of a high-temperature pressure medium.SOLUTION: A pressure sensor comprises: a housing 10 having a tip-end cylindrical section 11; a pressure measurement unit 30 accommodated in the housing and provide...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To provide a pressure sensor capable of suppressing influence of heat to accurately sense pressure of a high-temperature pressure medium.SOLUTION: A pressure sensor comprises: a housing 10 having a tip-end cylindrical section 11; a pressure measurement unit 30 accommodated in the housing and provided with a piezoelectric body; and a diaphragm 20 comprising a flexible tabular section 21 fixed to an inner wall of the tip-end cylindrical section, and a rod section 22 disposed between the flexible tabular section and the pressure measurement unit. The pressure sensor also includes a heat shield sphere 70 which is retained inside the tip-end cylindrical section to shield the diaphragm from a pressure medium. Such an arrangement allows for suppressing influence of heat to accurately sense pressure of the pressure medium.SELECTED DRAWING: Figure 2
【課題】熱の影響を抑制して、高温の圧力媒体の圧力を高精度に検出できる圧力センサを提供する。【解決手段】先端筒状部１１を有するハウジング１０、ハウジング内に収容されると共に圧電体を含む圧力計測部３０、先端筒状部の内側に固定された可撓板状部２１及び可撓板状部と圧力計測部の間に介在するロッド部２２を有するダイヤフラム２０を備えた圧力センサにおいて、ダイヤフラムを圧力媒体から遮蔽するべく先端筒状部の内側に保持された遮熱用球状体７０を含む。これによれば、熱の影響を抑制して、高温の圧力媒体の圧力を高精度に検出することができる。【選択図】図２ |
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