Back to results
US 2009/0013543 A1Published application
Piezoelectric quartz level sensor
AssigneeBeijing Information Technology Institute
InventorsFuxue Zhang, Wei Zhang
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeBeijing Information Technology Institute
InventorsFuxue Zhang, Wei Zhang
Estimating the term…
The present invention relates to a new piezoelectric quartz level sensor mainly applied in the attitude stabilized and control system of the aircraft, robot, vehicle, ship, oil drilling platform, construction, industrial automation equipment, radar, and satellite, comprising a sensitive element, signal processing circuit, base, outer case and socket. The piezoelectric quartz level sensor transfers the deflection angle of the object to the force exerted on two symmetrical mounted round piezoelectric quartz wafers, and then utilizing the prominent force sensitivity of the piezoelectric quartz, the level attitude parameter of an objected can be detected through the frequency variation due to the force exerted on the two piezoelectric quartz wafers. Therefore, the present invention can satisfy the demand of high stability and resolution, low non-linear degree, quick start time, wide measuring range and operating temperature, good ability to resist shock, and digital output.
A piezoelectric quartz level sensor, comprising a sensitive element, a signal processing circuit, a base, an outer case and a socket, wherein said sensitive element comprises two round piezoelectric quartz wafers symmetrically mounted on the two sides of the axial line of a column between a top panel and a bottom panel, an overload protective unit on the axial, transverse, vertical direction of the piezoelectric quartz wafers, wherein said axial overload protect unit comprises a sensitive block, a shock pad between a bottom panel and a pallet, and an adjustable axial retaining bolt on a mass column object of the sensitive block, and said transverse and vertical overload protective unit comprises overload protective frame, four adjustable retaining bolts around said mass column of said overload protective frame, wherein said sensitive element further comprises a sealed cover that is fastened to said base.
Dependencies are inferred from the claim text.