Weighing Apparatus Dynamic Filter Control for Conveyance Noise
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Solution Overview
Problem
Existing weighing apparatus require complex filter settings and technical expertise to achieve high weighing accuracy, making it difficult for non-experts to set appropriate filters.
Innovation Solution
A weighing apparatus with a control unit that determines filter settings based on the weight, conveyance speed, and length of the article, using stored information to associate these parameters with optimal filter settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a filter with fixed characteristics is used to reduce noise in the weigh signal, then noise reduction is achieved, but weighing accuracy drops when noise frequency varies with different articles and conveyance conditions
Solution Approach 1:
The filter characteristics are made dynamically adjustable based on conveyance speed and article length. The control unit automatically selects or adjusts filter parameters according to the detected conveyance conditions, allowing the filter to adapt its characteristics to match the noise frequency generated under different operating conditions, thus maintaining both noise reduction and weighing accuracy
Solution Approach 2:
The invention changes the filter parameters (such as cutoff frequency, filter order) based on varying conveyance speed and article length. By linking filter parameter selection to measurable operational parameters, the system optimizes noise filtering for each specific conveying scenario without sacrificing measurement precision
2Measurement precision
If filter characteristics are made adjustable to maintain weighing accuracy under varying conditions, then weighing accuracy is improved, but device complexity and difficulty of operation increase
Solution Approach 1:
The weighing device performs self-configuration by automatically determining optimal filter settings based on the conveyance speed and article length detected during operation. The control unit autonomously selects appropriate filter parameters without requiring user intervention or manual tuning, making the advanced filtering capability accessible to operators without specialized knowledge
Solution Approach 2:
The system uses feedback from sensors that detect conveyance speed and article dimensions to automatically adjust filter characteristics. This closed-loop approach allows the filter settings to respond dynamically to actual operating conditions, eliminating the need for manual preconfiguration while maintaining optimal weighing accuracy
3Measurement precision
If filter settings are optimized for specific conditions, then weighing accuracy improves, but the system becomes less adaptable to different articles and conveyance conditions
Solution Approach 1:
The filter system is designed to be dynamically reconfigurable based on detected conveyance conditions. By linking filter parameter selection to variable inputs such as conveyance speed and article length, the system automatically adapts its filtering characteristics to match the specific noise profile generated for each article type and conveying scenario, thereby maintaining both optimization and versatility
Data Source
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AI summary
Problem To provide a weighing apparatus that conveys an article and weighs the article as it is being conveyed and with which it is possible to achieve an appropriate filter setting even if one is not a knowledgeable and experienced technician. Solution A weighing apparatus 100 includes a second conveyor 14, a load cell 28, an acquisition unit 86, and a control unit 84. The second conveyor receives and conveys an article. The load cell detects the weight of the second conveyor or, in a case where the second conveyor is conveying the article, the weight of the second conveyor and the weight of the article on the second conveyor and outputs a weigh signal. The acquisition unit acquires a prescribed weight of the article conveyed by the second conveyor or the conveyance speed of the article conveyed by the second conveyor, and the length of the article in the direction in which it is conveyed by the second conveyor. The control unit determines, based on the prescribed weight of the article or the conveyance speed of the article, and the length of the article that the acquisition unit has acquired, a filter setting to use to filter the weigh signal detected by the load cell.