Pressure sensor
A pressure sensor and pressure technology, applied in the direction of measuring fluid pressure, instruments, measuring devices, etc., can solve the problems of heat shield falling off, sensor part accuracy reduction, and the inability to suppress the influence of heat, etc., to prevent accuracy reduction and suppress thermal strain Effect
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[0067] Below, while referring to the attached Figure 1 Embodiments of the present invention will be described.
[0068] like figure 2 As shown, the pressure sensor of the first embodiment is attached to a cylinder head Eh of the engine, and detects the pressure of combustion gas in the combustion chamber as a pressure medium.
[0069] like Figure 1 to Figure 3 As shown, the pressure sensor of the first embodiment includes an outer housing 10 and a sub housing 20 as a cylindrical housing H defining an axis S, a diaphragm 30, a heat shield 40, a holding plate 50, and a positioning member. 60 . The heat insulating member 70 , the pressure measuring member 80 , the preload imparting member 90 , the lead wire 101 as the first electric conductor, the lead wire 102 as the second electric conductor, and the connector 110 .
[0070] Here, the pressure measurement member 80 includes a first electrode 81 , a piezoelectric body 82 , and a second electrode 83 stacked in this order al...
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