Pneumatic-Electromagnetic Fruit Impactor for Precise Texture Detection
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Solution Overview
Problem
Existing fruit texture detection devices suffer from low automation, limited detection accuracy, poor repeatability, narrow applicability, and a high risk of causing fruit damage, with existing solutions being unsuitable for online sorting and affected by environmental vibrations and fruit shape.
Innovation Solution
A pneumatic-electromagnetic-driven impact device with a retractable bellow motion unit, impactor motion unit, and impactor housing unit, utilizing a flexible impact head and electromagnetic actuation for precise control of impact force and distance, combined with a sensor to detect fruit texture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an electromagnetically driven plunger is used to strike the fruit, then the detection accuracy is improved, but the device becomes sensitive to fruit shape and size, and the impact force and stroke are not easily adjustable, increasing the risk of fruit damage
Solution Approach 1:
The patent employs a pneumatic actuator that can dynamically adjust the impact force and stroke length based on fruit characteristics. The pneumatic system allows real-time modification of impact parameters, making the device adaptable to different fruit shapes, sizes, and textures without requiring fixed mechanical configurations.
Solution Approach 2:
The invention changes the physical parameters of the impact mechanism by using pneumatic pressure control instead of fixed electromagnetic force. This allows continuous adjustment of impact force magnitude and duration, enabling the system to optimize detection parameters for different fruit types while maintaining consistent detection accuracy.
2Ease of operation
If a pneumatic actuator is used to drive the impactor, then the impact force and stroke are easily adjustable, but the device complexity increases
Solution Approach 1:
The patent utilizes a pneumatic actuator system that replaces complex mechanical adjustment mechanisms with pneumatic pressure control. By regulating air pressure and flow, the system achieves easy adjustment of impact parameters without requiring complex mechanical linkages, gears, or manual calibration mechanisms.
3Device complexity
If compressed air jets are used for free vibration excitation, then the device simplicity is maintained, but the detection accuracy is limited and environmental vibrations affect the results
Solution Approach 1:
The patent transitions from passive free vibration excitation using compressed air jets to active controlled impact excitation. The pneumatic actuator delivers precisely timed and controlled impact forces, creating consistent forced vibrations that are less susceptible to environmental interference while maintaining relative system simplicity.
4Object-affected harmful factors
If an internal impactor with passive sensor is used, then the fruit damage risk is reduced, but the detection sensitivity and measurement range are limited
Solution Approach 1:
The patent replaces passive mechanical sensors with active sensing technology that can detect vibrations and impact responses more sensitively. This substitution enables the system to maintain low impact forces (reducing fruit damage) while achieving higher detection sensitivity and broader measurement ranges through advanced signal processing and sensor technology.
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
Enables high-precision, nondestructive fruit texture detection with high automation, stable repeatability, wide applicability, and low risk of fruit damage, suitable for indoor smart sorting lines.
Implementation Method 1
The bellow motion unit is connected to an external air pump, which is used to change the length of the bellow
Implementation Method 2
pneumatic-electromagnetic-driven impact device
Data Source
AI summary
A pneumatic-electromagnetic-driven impact device for nondestructive detection of fruit texture. The bellow support member is connected to a connection plate and a bellow. A pneumatic connector is mounted on the bellow support member. A support spring is connected to the bellow support member, while the support spring is fixedly connected to the impactor housing cover. The impactor housing is connected to the impactor housing cover and the bellow. An insulating sleeve is installed inside the impactor housing, forming a hollow region between the sleeve and the housing for placing the electromagnetic coils. An iron core is arranged inside the insulating sleeve, and a sliding rod is movably connected inside the iron core. Two annular magnets are connected 10 to the sliding rod via a magnetic ring base. A sensor is embedded in a sensor base, and a flexible impact head is fixedly connected to the bottom of the sensor base.