Piezoelectric quartz accelerometer
First Claim
1. A piezoelectric quartz accelerometer comprising:
- a sensitive element, a signal processing circuit, a base, an outer case, and a socket for leading out signals produced by said signal processing circuit, wherein said base and said outer case are closely attached to become a cavity, said sensitive element and said signal processing circuit are mounted on said base, wherein said sensitive element comprises two round piezoelectric quartz wafers, a first supporting frame and a second supporting frame, wherein said two round piezoelectric quartz wafers are symmetrically mounted on both sides of a centre axial line of said first supporting frame and said second supporting frame;
said sensitive element further comprises an axial shock buffer unit and a transverse retaining unit for protecting overload of said two round piezoelectric quartz wafers;
said sensitive element has a sealed cavity which is formed by a sealing cover and a base of said sealed cavity, sealed by a sealing sturcture with a sealing gasket, and fastened by a bolt;
said signal processing circuit comprises an oscillation circuit for obtaining a frequency signal from said two round piezoelectric quartz wafers under an acceleration, a frequency differential forming circuit for extracting the frequency signal, a phase lock and times frequency circuit for amplifying the frequency signal, compensating zero phase, compensating non-linearization and compensating temperature, and an output circuit for outputting a digital signal having linearization relationship with the acceleration, wherein a magnitude and a polarization of the digital signal precisely reflects a magnitude and a direction of the acceleration.
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Accused Products
Abstract
A piezoelectric quartz accelerometer includes a sensitive element, a signal processing circuit, a base, an outer case, and a socket, wherein the sensitive element includes two round piezoelectric quartz wafers, and a supporting frame, wherein the two round piezoelectric quartz wafers are symmetrically mounted on both sides of the center axial line of the supporting frame; the sensitive element further includes an axial shock buffer unit and a transverse retaining unit for protecting overload of the two round piezoelectric quartz wafers; the signal processing circuit includes an oscillation circuit for obtaining frequency signal, a frequency differential forming circuit for extracting signal, a phase lock and times frequency circuit for amplifying signal, compensating zero phase, compensating non-linearization and compensating temperature, and an output circuit.
74 Citations
15 Claims
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1. A piezoelectric quartz accelerometer comprising:
- a sensitive element, a signal processing circuit, a base, an outer case, and a socket for leading out signals produced by said signal processing circuit, wherein said base and said outer case are closely attached to become a cavity, said sensitive element and said signal processing circuit are mounted on said base, wherein said sensitive element comprises two round piezoelectric quartz wafers, a first supporting frame and a second supporting frame, wherein said two round piezoelectric quartz wafers are symmetrically mounted on both sides of a centre axial line of said first supporting frame and said second supporting frame;
said sensitive element further comprises an axial shock buffer unit and a transverse retaining unit for protecting overload of said two round piezoelectric quartz wafers;
said sensitive element has a sealed cavity which is formed by a sealing cover and a base of said sealed cavity, sealed by a sealing sturcture with a sealing gasket, and fastened by a bolt;
said signal processing circuit comprises an oscillation circuit for obtaining a frequency signal from said two round piezoelectric quartz wafers under an acceleration, a frequency differential forming circuit for extracting the frequency signal, a phase lock and times frequency circuit for amplifying the frequency signal, compensating zero phase, compensating non-linearization and compensating temperature, and an output circuit for outputting a digital signal having linearization relationship with the acceleration, wherein a magnitude and a polarization of the digital signal precisely reflects a magnitude and a direction of the acceleration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- a sensitive element, a signal processing circuit, a base, an outer case, and a socket for leading out signals produced by said signal processing circuit, wherein said base and said outer case are closely attached to become a cavity, said sensitive element and said signal processing circuit are mounted on said base, wherein said sensitive element comprises two round piezoelectric quartz wafers, a first supporting frame and a second supporting frame, wherein said two round piezoelectric quartz wafers are symmetrically mounted on both sides of a centre axial line of said first supporting frame and said second supporting frame;
Specification