Counter Unit Output Delay Control Beyond Pulse Signal Cycles
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Solution Overview
Problem
The counter unit in existing systems cannot adjust the timing of an output to an actuator independently of the pulse signal cycle, leading to large timing errors and low user convenience when the pulse signal cycle changes.
Innovation Solution
A counter unit that includes a measurement unit to count pulse signals, a comparison unit to determine matches between actual and target values, and an output unit with an output delay mechanism that adjusts the timing based on a timing adjustment value independent of the pulse signal cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the timing of output to actuator is adjusted by increasing or decreasing target value compared with actual measurement value, then the timing can be adjusted, but the adjustable timing width cannot be smaller than the cycle of pulse signal and long cycle causes large timing error
Solution Approach 1:
The invention changes the parameter used for timing adjustment from target value (which is discrete and tied to pulse cycle) to output timing itself (which can be continuously adjusted). The control unit directly sets the output timing based on the relationship between target position and actuator response time, enabling fine-grained timing control independent of pulse signal cycle.
Solution Approach 2:
The invention replaces the mechanical counting approach (counting pulse signals to determine timing) with a direct timing control approach. Instead of using the number of pulses as the basis for timing adjustment, the system directly calculates and sets the output timing based on position-target relationships and actuator response characteristics.
2Stability of the object's composition
If the target value is increased or decreased to maintain the same output timing after pulse signal cycle change, then the timing can be maintained, but user convenience deteriorates due to complex adjustment
Solution Approach 1:
The system performs self-adjustment automatically. When the pulse signal cycle changes, the control unit automatically recalculates the appropriate output timing based on the new cycle and the target position, without requiring the user to manually adjust target values. The system serves itself by detecting cycle changes and adapting the timing accordingly.
Solution Approach 2:
The system uses feedback from the pulse signal cycle information to automatically adjust output timing. The control unit monitors the pulse cycle and uses this information to calculate the appropriate timing adjustment, creating a closed-loop system that adapts to changing conditions without user intervention.
3Quantity of substance
If the cycle of pulse signal is long, then the measurement range is sufficient, but the timing error becomes large when adjusting output timing
Solution Approach 1:
The invention changes the fundamental parameter for timing control from discrete pulse counts to continuous timing values. By directly controlling the output timing based on target position and actuator response characteristics, the system achieves high timing precision regardless of the pulse signal cycle length, while maintaining the full measurement range provided by the pulse signals.
Data Source
AI summary
A counter unit, a counter unit control method, a control device, and a control system are provided. A counter unit (10) executes an output to an actuator (40) at a time point when a waiting time indicated by a timing adjustment value (Ta) received from PLC (20) has elapsed since it was determined that an actual measurement value obtained by using a pulse signal has matched with a target value.