Mechanical Tilt Sensor With Resettable Ratchet Tilt Tracking
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Solution Overview
Problem
Conventional tilt sensors for shipping packages cannot track total tilt motion, are prone to losing data due to harsh handling, cannot be reset, and often require batteries that can fail, leading to waste and resource inefficiency.
Innovation Solution
A resettable mechanical tilt sensor using a pendulum-driven one-way rotational drive with a motion meter to track total tilt, featuring a ratchet channel system to record maximum tilt and a manual reset mechanism, eliminating the need for batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If conventional tilt sensors use batteries to power electronic components, then the sensor can provide continuous operation and data tracking, but the battery may fail over time and require replacement, increasing maintenance costs and environmental waste
Solution Approach 1:
The patent replaces electronic components powered by batteries with a purely mechanical tilt sensing mechanism. The sensor uses a pendulum, ratchet mechanism, and gear system that operates passively through mechanical forces alone, eliminating the need for batteries and electronic power sources while maintaining operational reliability indefinitely.
Solution Approach 2:
The mechanical tilt sensor is designed to be self-powered through the motion it detects. The pendulum's movement under gravity and inertial forces directly drives the ratchet and gear mechanisms, allowing the sensor to track tilt accumulation without requiring external power sources or maintenance.
2Reliability
If conventional tilt sensors are designed to be disposable due to battery failure and data loss risks, then reliability is maintained, but resource waste and environmental impact increase
Solution Approach 1:
The patent enables recovery and reuse of the tilt sensor by providing a manual reset mechanism. After recording maximum tilt exposure, the sensor can be reset to its initial state and deployed again, transforming a disposable device into a reusable one and reducing material waste while maintaining data integrity through the ratchet's one-way locking feature.
3Ease of operation
If conventional tilt sensors allow free movement of internal components during harsh handling, then the sensor remains operational, but data accuracy is lost due to component displacement
Solution Approach 1:
The ratchet mechanism is designed with inherent resistance to reverse motion and component displacement. The teeth and pawl structure provide mechanical protection against false readings caused by harsh handling, ensuring that only legitimate tilt movements are recorded while preventing spurious movements from affecting measurement accuracy.
4Device complexity
If conventional tilt sensors track only instantaneous tilt angle, then the device complexity is reduced, but the ability to provide comprehensive tilt history and total tilt motion is lost
Solution Approach 1:
The patent combines multiple measurement functions into a single integrated mechanical system. The ratchet mechanism simultaneously tracks maximum tilt angle, total tilt motion accumulation, and provides visual indication through window displays, achieving comprehensive tilt history tracking without significantly increasing device complexity through passive mechanical integration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The sensor accurately tracks total tilt motion, is reusable, resistant to data loss during handling, and operates without batteries, reducing waste and costs.
Implementation Method 1
A pendulum coupled to an input shaft of the one-way rotational drive may rotate responsive to tilt motion of the tilt sensor
Implementation Method 2
A resettable mechanical tilt sensor may include a pendulum coupled to a one-way rotational drive
Implementation Method 3
A resettable mechanical tilt sensor may include a one-way rotational drive, a pendulum coupled to an input shaft of the one-way rotational drive
Data Source
AI summary
A tilt sensor includes a one-way rotational drive configured to translate rotational motion of an input shaft in a first rotational direction about a first axis of the input shaft and in a second rotational direction about the first axis into rotational movement in a first rotational direction about a second axis of an output shaft. The tilt sensor further includes a pendulum coupled to the input shaft. The pendulum is configured to rotate the input shaft in the first rotational direction or the second rotational direction responsive to a tilt motion of the tilt sensor. The tilt sensor further includes a motion meter coupled to the output shaft. The motion meter is configured to display a measure of total tilt motion of the tilt sensor.