Digital Filter Setting Device Step Response Visualization
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Solution Overview
Problem
Users face difficulties in calculating and recognizing the step response time of digital filters, leading to delayed signal rising and potential I/O refresh timing issues in programmable logic controllers, as existing technologies lack effective methods for setting digital filter parameters and displaying filter characteristics.
Innovation Solution
A digital filter setting device that receives filter parameters, calculates step response time, and displays the results graphically, allowing users to easily recognize filter characteristics and prevent timing issues by visualizing the step response and attenuation characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple digital filter processing is executed to stabilize the analog signal, then the signal stabilization effect is improved, but the step response time increases causing delay
Solution Approach 1:
The patent pre-calculates and stores the relationship between filter parameters and step response time in a lookup table before actual filtering operations. This allows the system to quickly determine the appropriate number of filter processing stages without performing complex real-time calculations, thus achieving signal stabilization with minimal delay.
Solution Approach 2:
The patent dynamically adjusts the number of digital filter processing stages based on the required step response time. By varying the filter processing count according to real-time requirements, the system optimizes the balance between signal stabilization quality and response speed.
2Ease of operation
If manual calculation of operation cycle is used to set filter parameters, then parameter setting is possible, but the calculation process is complex and difficult for users
Solution Approach 1:
The patent introduces a microcomputer as an intermediary device that automatically performs the complex operation cycle calculations. The microcomputer receives filter parameter inputs, computes the corresponding step response times using pre-stored relationships, and presents the results to users in an easily understandable format, eliminating the need for users to perform manual complex calculations.
Solution Approach 2:
The patent replaces manual calculation methods with automated computer-based calculation. Instead of requiring users to manually compute operation cycles and filter parameters, the system uses a microcomputer to automatically perform these calculations, significantly simplifying the user interface and operation.
3Reliability
If step response time is not recognized in advance, then filter parameter setting is simple, but signal rising delay and I/O refresh timing issues occur
Solution Approach 1:
The patent implements a feedback mechanism where the microcomputer calculates and displays the step response time corresponding to the selected filter parameters. This feedback allows users to see the actual performance characteristics before finalizing parameter settings, enabling them to make informed decisions that prevent signal rising delay and I/O refresh timing problems.
Solution Approach 2:
The patent pre-calculates and stores the relationships between various filter parameters and their corresponding step response times. Before the user finalizes parameter settings, the system has already determined and displayed the expected performance characteristics, allowing users to anticipate and avoid timing issues before they occur.
Data Source
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AI summary
A digital filter setting device, a control method of the digital filter setting device, and a recording medium are provided. Filter characteristics of a digital filter after parameter setting are easily recognized by a user. A digital filter setting device (1) includes: a parameter setting part (11) receiving input of filter parameters; a step response time calculation part (14) calculating a step response time of the digital filter in a case that the filter parameters are set; and a graph generating part (12) displaying the calculated step response time in the form of graph.