Compression type ultrahigh temperature piezoelectric acceleration sensor with approximately constant pre-tension
By employing an inclined plane structure and the thermal expansion difference of different high-temperature resistant metals in the piezoelectric accelerometer, the problem of preload variation at high temperatures was solved, achieving an approximately constant preload for the sensor under high-temperature conditions, thus improving the stability and reliability of the sensor.
Patent Information
- Application Number
- CN202610540002.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-22
- Publication Date
- 2026-07-17
AI Technical Summary
Existing compression-type high-temperature piezoelectric accelerometers suffer from significant changes in preload due to thermal expansion mismatch under high-temperature conditions, leading to sensitivity drift and reduced reliability.
By employing a sloping structure and the thermal expansion difference of different high-temperature resistant metals, a portion of the radial thermal expansion is converted into axial thermal expansion to compensate for the loss of preload at high temperatures. The mass block structure is designed to achieve an approximately constant preload by utilizing the sloping structure and the thermal expansion difference of different high-temperature resistant metals.
Maintaining a near-constant sensor preload over a wide temperature range reduces the impact of temperature drift, improving sensor stability and reliability, and making it suitable for miniaturized applications and ultra-high temperature environments.
Smart Images
Figure CN122410076A_ABST