Optical Sensor Vial Detection in Automated Dispensing Chutes
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Solution Overview
Problem
Automated pill dispensing systems face challenges in accurately detecting the presence or absence of pill-containing vials in output chutes, particularly due to variables like transparent vials and ambient lighting conditions, which can lead to errors and system malfunctions.
Innovation Solution
An automated pill dispensing system equipped with an optical sensor and a controller that uses a filter circuit to adjust detection signals for ambient light conditions, allowing for accurate detection of vials and controlling the depositing process based on presence or absence, thereby eliminating the need for manual scanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual scanning of vial labels is used to detect vial presence, then system complexity is reduced, but detection accuracy and reliability deteriorate due to human error potential
Solution Approach 1:
The patent replaces manual mechanical scanning with an optical detection system. The optical sensor automatically detects vial presence by sensing the absence of light (when a vial blocks the light path), eliminating human error while maintaining relatively simple system architecture through the use of basic optical components.
2Reliability
If optical sensors are used to detect transparent vials, then detection accuracy improves, but measurement precision deteriorates due to ambient light interference
Solution Approach 1:
The patent employs periodic pulsing of the optical sensor to create time-based differentiation between ambient light and vial-induced light blockage. By activating the sensor in periodic pulses and measuring the absence of light during these specific time windows, the system can distinguish true vial presence from constant ambient lighting conditions, thereby maintaining measurement precision while achieving reliable detection of transparent vials.
3Productivity
If automated detection systems are implemented, then productivity improves by eliminating manual scanning, but device complexity increases due to additional sensors and control mechanisms
Solution Approach 1:
The patent implements a self-service detection mechanism where the optical sensor automatically monitors vial presence and the controller autonomously responds by controlling the depositing mechanism. This automated feedback loop eliminates the need for manual scanning operations, significantly improving productivity while keeping the added complexity minimal through the use of straightforward sensor-controller-actuator architecture.
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
The system ensures accurate detection of vial presence or absence in the chute, reducing errors and system stoppages by automatically controlling the depositing process and providing alerts for full chutes, enhancing operational efficiency.
Implementation Method 1
The optical sensor includes an optical emitter and an optical detector configured to be operated cooperatively to output a detection signal indicating a presence or absence of a vial
Implementation Method 2
The system may include a filter circuit coupled between the controller and the optical sensor. The filter circuit may be configured to adjust the detection signal output from the optical sensor to account for ambient light conditions
Data Source
AI summary
An automated pill dispensing system includes an output chute configured to hold pill-containing vials and an optical sensor located at a predetermined location in the output chute. The optical sensor includes an optical emitter and an optical detector configured to be operated cooperatively to output a detection signal indicating a presence or absence of a vial at the predetermined location of the output chute. A controller is coupled to the optical sensor and is configured to receive the detection signal therefrom, detect the presence or absence of the vial at the predetermined location of the output chute in response to the detection signal, and control a next depositing event whereby a next vial is deposited in the output chute responsive to the detection. Related methods of operation are also discussed.