Height/Levelling Measurement TRIZ Cases
- MEMS Pressure Sensor Structure for Minute Pressure Detection
Pressure-induced bending shifts resonant frequency in a MEMS structure, enabling minute pressure sensing without wafer thinning.
- Low-Range Altimeter Leakage Cancellation for Integrated Antennas
Active I/Q leakage cancellation and an RF circulator help integrated low-range altimeters preserve sensitivity despite antenna coupling.
- GPS Altitude Hold Switching for Stable Aircraft Altitude Control
Switching from altimeter hold to GPS inertial altitude hold reduces terrain and pressure-driven fluctuations in aircraft altitude control.
- UAV Altitude Control Using Terrain-Adjusted Flight Restrictions
Terrain-aware altitude limits let UAVs adjust flight ceilings to local ground level, improving airspace compliance and safe navigation.
- Aircraft Altitude Hold Switching Between Altimeter and GPS
Above a threshold altitude, GPS-aided inertial navigation replaces fluctuating radar or barometric readings for steadier aircraft altitude hold.
- UAV Altitude Control with Ground-Relative Flight Limits
Map and sensor data shift UAV altitude limits from sea level to ground-relative height, improving airspace compliance over uneven terrain.
- Mining Subsidence Leveling Mechanism for Uneven Ground Setup
A rotatable leveling and screw-lift structure stabilizes level surveying on soft, uneven mining subsidence ground while cutting setup time.
- Radio Altimeter Failure Prediction Using Altitude Difference Analytics
Altitude differences between multiple radio altimeters are analyzed to flag likely failures early, reducing delays and maintenance costs.
- Robot Height-Transition Detection for Curb and Step Navigation
3D heightmap sensing lets a robot classify curbs and steps, then choose actions to traverse varied terrain with less sensor complexity.
- UAV Altitude Control Using Terrain-Relative Flight Restrictions
Dynamic terrain-relative altitude limits help UAVs avoid restricted airspace while still reaching needed heights over uneven ground.
- Radio Altimeter Failure Indicators from Dual Altitude Statistics
Differences between two radio altimeters are reduced to mode, mean, median, and deviation features to flag failures before disruption.
- Cold Temperature Altitude Correction During Airport Approach
Automatic NOTAM and sensor-based altitude correction helps pilots handle cold temperature approach restrictions with less radio workload.
- Surveying Instrument Centering With Toric Laser Alignment
A toric visible-light spotlight replaces point centering, easing alignment with measuring marks while supporting distance-based height calculation.
- Weather Station Altitude Calibration Using Allowed Error Thresholds
Maximum allowed altitude error is used to choose the lowest-cost calibration approach that still keeps weather station pressure calibration accurate.
- Digital Level with Dual Accelerometers and Power Sleep Control
Complementary accelerometers improve orientation accuracy while controller-managed sleep modes cut power use and extend digital level runtime.
- Radar Altimeter Fault Monitoring With Adaptive Terrain Thresholds
Adaptive terrain-based thresholds compare radar altitude with GPS and terrain data to catch faults without nuisance flagging.
- Laser Level Target Post With Reflective Alignment for Server Cabinets
A reflective target post with a magnetic base lets one engineer level server cabinets from the ground, avoiding ladders and parallax errors.
- Ultrasonic Footstep Mapping for Indoor Navigation in Smoke and Darkness
Foot-mounted ultrasonic, inertial, and altitude sensing builds indoor maps in smoke or darkness by fusing step-based map points with particle filtering.
- Weather Station Calibration with Temperature-Based Altitude Error Limits
Temperature-based altitude limits help weather stations select lower-cost calibration methods for accurate pressure-sensor calibration.