Blower Load Sensing for Airflow Conveyance State Detection
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Solution Overview
Problem
Conventional work vehicles face reduced airflow conveyance efficiency and sensing body damage due to the presence of sensing components inside the container or airflow passage, which are necessary for evaluating the conveyance state of objects.
Innovation Solution
A work vehicle with a conveyance mechanism using wind-generated airflow and an evaluation unit that detects the drive load of the blower to determine the conveyance state, eliminating the need for sensing components within the airflow passage by correlating drive load fluctuations with object accumulation in the container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensing body is provided inside the container or in the airflow passage to evaluate the conveyance state, then the conveyance state can be detected, but the conveyance efficiency of the airflow is reduced and the sensing body is damaged due to continuous contact with the conveyed object
Solution Approach 1:
The sensing body is extracted from the airflow passage and container interior, and repositioned in the airflow source chamber where it can detect conveyance state through drive load variations without being exposed to the conveyed object or obstructing the airflow path
Solution Approach 2:
The drive load of the blower serves as an intermediary parameter that indirectly reflects the conveyance state. Instead of directly sensing the conveyed object, the system measures the blower's drive load, which changes in response to container fill level, thereby eliminating the need for physical contact between the sensing body and conveyed object
2Measurement precision
If a sensing body is provided inside the container or in the airflow passage to evaluate the conveyance state, then the conveyance state can be detected, but the sensing body is damaged and its life is shortened due to continuous contact with the conveyed object
Solution Approach 1:
The sensing body is extracted from the container interior and airflow passage, and relocated to the airflow source chamber where it operates in a clean environment free from conveyed object contact, thereby extending its service life and improving reliability
Solution Approach 2:
The blower's drive load acts as an intermediary measurement target, allowing the sensing body to detect conveyance state information without directly interacting with the conveyed object, thus preventing damage and extending sensing body lifespan
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
This solution ensures efficient airflow and extends the lifespan of sensing components by allowing for accurate conveyance state evaluation without direct contact with the conveyed object, enabling timely and effective object discharge and reducing maintenance needs.
Implementation Method 1
a conveyance mechanism configured to convey an object to the container using a force of wind generated by a blower
Implementation Method 2
an evaluation unit configured to evaluate a conveyance state of the conveyed object in the container, and the evaluation unit has a drive load detecting function of detecting a drive load of the blower
Data Source
AI summary
A work vehicle includes: a container; a conveyance mechanism configured to convey an object to the container using a force of wind generated by a blower; and an evaluation unit configured to evaluate a conveyance state of the conveyed object to the container. The evaluation unit has a drive load detecting function of detecting a drive load of the blower, and a conveyance state determining function of determining whether the conveyance state reached a predetermined conveyance state, based on the detected drive load.