Method for adaptively adjusting size of adsorption airflow in automatic page turning process of book file

Abstract

The invention discloses a method for adaptively adjusting the size of adsorption airflow, which is mainly completed by combining a mechanism consisting of a manipulator, a paper adsorption component, an ultrasonic component, an electrically-controlled potentiometer and a main control circuit board with a corresponding software algorithm. An ultrasonic signal triggers a control circuit board to control a potentiometer with a stepping motor connected with an adsorption component to rotate, the effect of reducing or increasing the adsorption force of the paper adsorption component is achieved by reducing or increasing adsorption airflow, certain adsorption airflow is reduced or increased each time, and if the problem cannot be solved at a time, the paper adsorption component can be replaced. In addition, continuous adjustment can be carried out for multiple times, adjustment is stopped until the phenomenon of overlapping does not occur or the situation that adsorption cannot be achieved does not occur, and by means of the method, the effect of adaptively adjusting the size of the adsorption airflow in the automatic page turning process of the book files can be achieved.

Description

Technical Field

[0001] This invention is applied to an automatic page-turning book scanner that uses adsorption to adsorb paper. The application of this invention aims to solve the problem of adaptive adjustment of airflow size when using adsorption to adsorb thin and thick paper. Background Technology

[0002] Traditionally, automatic page-turning book scanners that use adsorption to pick up paper rely on manual adjustment of the airflow. This lacks intelligent processing during the page-turning process. When dealing with documents containing both thin and thick paper (or documents with varying paper thicknesses), a fixed airflow cannot simultaneously accommodate both types of paper. Insufficient airflow prevents proper adsorption, while excessive airflow results in the picking up of too many pages. Manual intervention is required when the airflow is unsuitable. This is especially problematic when a document contains a large number of sheets of varying thicknesses, necessitating frequent airflow adjustments during adsorption. Users find this cumbersome and disruptive to workflow. Summary of the Invention

[0003] To achieve adaptive adjustment of the airflow size during automatic page-turning in an automatic page-turning book scanner, this invention designs a mechanism and matching algorithm software mainly composed of a base (1), a robotic arm (2), a paper-feeding component (3), an ultrasonic component (4), an electrically adjustable potentiometer (5), and a main control circuit board (6). The electrically adjustable potentiometer (5) is a potentiometer equipped with a stepper motor (or a servo motor). A high-speed negative pressure fan is installed inside the paper-feeding component (3). The ultrasonic component (4) and the electrically adjustable potentiometer (5) are connected to the main control circuit board (6). The high-speed negative pressure fan in the paper-feeding component (3) is connected to the electrically adjustable potentiometer (5). When using the high-speed negative pressure fan as the main component for paper adsorption, the control flow of this invention is as follows: Figure 1As shown, the core content of this invention is to detect the flipping of the adsorbed paper by using an ultrasonic component (4) installed on the robotic arm (2). The detected ultrasonic signal is transmitted to the main control circuit board (6). The main control circuit board (6) controls the potentiometer (5) through designed software based on the ultrasonic signal. When the paper is not adsorbed because it is too thick or the adsorption airflow is too small, the stepper motor in the potentiometer (5) will rotate the potentiometer under the control of the main control circuit board (6) to make it rotate in the direction of decreasing resistance. As the resistance decreases, the current flowing to the high-speed negative pressure fan will increase, and the speed of the high-speed negative pressure fan will increase, thereby increasing the airflow for adsorbing the paper. Conversely, when the paper is too thin or the adsorption airflow is too large and the paper flips, the potentiometer will not flip. The stepper motor in the potentiometer (5) will rotate the potentiometer under the control of the main control circuit board (6), making it rotate in the direction of increasing resistance. As the resistance increases, the current flowing to the high-speed negative pressure fan will decrease, and the speed of the high-speed negative pressure fan will decrease, thereby reducing the airflow for adsorbing paper. Regardless of whether the airflow is increased or decreased, the potentiometer adjustment will stop when the airflow is adjusted to just be able to adsorb a single sheet of paper. During this period, if the potentiometer (5) cannot solve the problem once, it can be automatically adjusted multiple times. After each adjustment of the potentiometer (5), the robot arm (2) will return to adsorb paper again until the situation of only adsorbing a single sheet occurs. Through this principle, we can realize the adaptive adjustment of the adsorption airflow size of the automatic page-turning book scanner during the automatic page-turning process. Of course, the core principle and control software algorithm described in this invention are also applicable to fully automatic page-turning book scanners that use a vacuum pump to generate adsorption airflow. In this application, the paper suction component (3) is changed from a high-speed negative pressure fan to an airflow adsorption component with adsorption channels, and the electrically adjustable potentiometer (5) is changed to an electrically adjustable airflow control valve with a stepper motor. The electrically adjustable airflow control valve is connected to the airflow adsorption component and the air pump through air pipes. The electrically adjustable airflow control valve is used to control the airflow rate. Its stepper motor is controlled by the main control circuit board (6). When the ultrasonic device on the robot arm (2) detects that the paper cannot be adsorbed or that multiple pages are adsorbed, it sends an abnormal signal to the main control circuit board (6). The main control circuit board (6) will control the stepper motor on the electrically adjustable airflow control valve to rotate forward or backward, thereby playing the role of adaptively adjusting the airflow rate. The control process is as follows: Figure 2 As shown, this control method is basically the same as the method described in the previous paragraph. Attached Figure Description

[0004] Figure 1 This is the electrical control flowchart of the present invention using a negative pressure adsorption fan as the air source; Figure 2 This invention uses an air pump as the air source in an electronically controlled process. Figure 3This is a schematic diagram showing the distribution of the components of the present invention; Figure 4 This is a cross-sectional view showing the distribution of the components of the present invention; Figure 3 and Figure 4 In the diagram, 1 is the base, 2 is the robotic arm, 3 is the paper suction component, 4 is the ultrasonic component, 5 is the potentiometer, and 6 is the main control circuit board. Detailed Implementation

[0005] Referring to the accompanying drawings, the present invention mainly consists of a base (1), a robotic arm (2), a paper suction component (3), an ultrasonic component (4), an electrically adjustable potentiometer (5), and a main control circuit board (6). The robotic arm (2), the electrically adjustable potentiometer (5), and the main control circuit board (6) are mounted on the base (1). The paper suction component (3) and the ultrasonic component (4) are mounted on the robotic arm (2). A high-speed negative pressure fan is installed inside the paper suction component (3). The electrically adjustable potentiometer (5) contains a potentiometer and a stepper motor (or servo motor). The ultrasonic component (4) contains a pair of ultrasonic elements. The device consists of a pair of ultrasonic components, one of which is a transmitter and the other is a receiver. One of the ultrasonic components is mounted on a paper suction part (3), and the other is mounted on a telescopic part of a robot arm (2). The end faces of the two ultrasonic transmitters and receivers are parallel and will be in relative positions during the detection period. The wires of the ultrasonic components are connected to the main control circuit board. The wires of the high-speed negative pressure fan are connected to the potentiometer terminal block in the electric potentiometer (5). The stepper motor in the electric potentiometer (5) is connected to the main control circuit board (6) by wires.In specific operation, the robotic arm (2) brings the paper suction component (3) and ultrasonic component (4) close to the paper surface. After the paper suction component (3) is close to the paper surface, it will swing in the opposite direction by 40 to 50 degrees within 1 second under the drive of a motor inside the robotic arm. Then, one telescopic component of the robotic arm (2) extends with the ultrasonic component and stops at the position directly opposite the other ultrasonic component to perform paper re-tension detection. The dwell time is less than 0.5 seconds, and then it retracts to the original position. When the suction component (3) fails to suction paper or suctions re-tension, the ultrasonic component will send a signal to the main control circuit board (6). Different signals are emitted, and the main control circuit board (6) will control and adjust the potentiometer (5) according to a set of designed matching algorithm logic after receiving the signal. Moreover, each time the potentiometer (5) is adjusted due to the abnormal signal emitted by the ultrasonic wave, the robot arm (2) will re-adsorb the paper according to the adjusted adsorption force. When the main control circuit board (6) receives an ultrasonic signal that indicates that the paper has not been adsorbed, the stepper motor in the potentiometer (5) will rotate the potentiometer in the potentiometer (5) under the control of the main control circuit board (6), making it rotate in the direction of decreasing resistance value. The decrease in resistance increases the current flowing to the high-speed negative pressure fan, thus increasing the fan speed and increasing the airflow adsorbed onto the paper. Conversely, when the paper is too thin or the airflow adsorbed is too large, the stepper motor in the potentiometer (5) rotates the potentiometer under the control of the main control circuit board (6), causing it to rotate in the direction of increasing resistance. As the resistance increases, the current flowing to the high-speed negative pressure fan decreases, thus reducing the airflow adsorbed onto the paper. Regardless of whether the airflow is increased or decreased, each time the ultrasonic wave... After the abnormal signal is emitted and the potentiometer (5) is adjusted, the robot arm (2) will re-adsorb the paper according to the adjusted adsorption airflow until the airflow is adjusted to just be able to adsorb a single sheet of paper, and then the potentiometer adjustment will stop. If the ultrasonic component does not emit an abnormal signal, the page-turning part of the scanner will continue to adsorb and turn the paper continuously according to a constant airflow. Using this intelligent adjustment method, we can achieve adaptive adjustment of airflow size in the automatic page-turning book scanner during the automatic page-turning process, thus creating conditions for the automatic page-turning book scanner to achieve unattended operation.When a fully automatic page-turning book scanner uses a vacuum pump as the air source to generate adsorption airflow, the adaptive adjustment of its adsorption airflow can also be achieved using the method described in this invention. The difference lies in the component composition of the mechanism that implements this method. Its main components are a base (1), a robotic arm (2), a vacuum pump, an air pipe, an electrically adjustable airflow control valve, an airflow adsorption component, an ultrasonic component (4), and a main control circuit board (6). The biggest difference between this configuration and the configuration using a high-speed negative pressure fan as the air source is that the components of the air source and the components for adjusting the airflow size are different. The adsorption airflow is generated using a vacuum pump, and the paper suction component (3) has been changed from using a high-speed negative pressure fan to an airflow adsorption component with adsorption channels. The electrically adjustable potentiometer (5) has been changed to an electrically adjustable airflow control valve with a stepper motor (or servo motor). The electrically adjustable airflow control valve includes a stepper motor (or servo motor). It consists of a gas valve and an electrically adjustable airflow control valve. The electrically adjustable airflow control valve is connected to the airflow adsorption component and the vacuum pump through the air pipe. The electrically adjustable airflow control valve is used to control the airflow rate. Its stepper motor is controlled by the main control circuit board (6). In this application, the actions and functions of the robot arm (2) and the ultrasonic component (4) are no different from those described in the previous paragraph. The control software algorithm is also similar. The difference in the control algorithm is that the angle parameter of the electrically adjustable airflow control valve is smaller than that of the electrically adjustable potentiometer (5) each time it is adjusted. When the ultrasonic device on the robot arm (2) detects that the paper cannot be adsorbed or that multiple pages are adsorbed, it sends an abnormal signal to the main control circuit board (6). The main control circuit board (6) will control the stepper motor on the electrically adjustable airflow control valve to rotate forward or backward, thereby playing the role of adaptively adjusting the airflow rate.

Claims

1. A method for adaptively adjusting the adsorption airflow during automatic page turning of bound documents, characterized by the use of a high-speed negative pressure fan as the main component for adsorbing paper: A mechanism and matching algorithm software were designed, mainly consisting of a base (1), a robotic arm (2), a paper suction component (3), an ultrasonic component (4), an electronically adjustable potentiometer (5), and a main control circuit board (6). The robotic arm (2), the electronically adjustable potentiometer (5), and the main control circuit board (6) are mounted on the base (1). The paper suction component (3) and the ultrasonic component (4) are mounted on the robotic arm (2). The paper suction component (3) contains a high-speed negative pressure fan. The electronically adjustable potentiometer (5) contains a potentiometer and a stepper motor (or servo motor). The ultrasonic component (4) contains a pair of ultrasonic... The ultrasonic components are a pair of ultrasonic components, one of which is a transmitter and the other is a receiver. One of the ultrasonic components is mounted on the paper suction part (3), and the other is mounted on a telescopic part of a robot arm (2). The end faces of the two ultrasonic transmitters and receivers are parallel and will be in relative positions during the detection period. The wires of the ultrasonic components are connected to the main control circuit board. The wires of the high-speed negative pressure fan are connected to the potentiometer terminal block in the electric potentiometer (5). The stepper motor in the electric potentiometer (5) is connected to the main control circuit board (6) by wires.

2. The core feature of the method for automatically adjusting the adsorption airflow size during the automatic page turning process of the document according to claim 1 is as follows: the ultrasonic component (4) installed on the robot arm (2) detects the page turning of the adsorbed paper. The detected ultrasonic signal is transmitted to the main control circuit board (6). The main control circuit board (6) controls the potentiometer (5) through the designed software according to the ultrasonic signal. When the paper is not adsorbed because the paper is too thick or the adsorption airflow is too small, the stepper motor in the potentiometer (5) will rotate the potentiometer under the control of the main control circuit board (6) so that it rotates in the direction of decreasing resistance. As the resistance decreases, the current flowing to the high-speed negative pressure fan will increase, and the speed of the high-speed negative pressure fan will increase, thereby achieving the desired effect. To increase the airflow for adsorbing paper, conversely, when the paper is too thin or the airflow is too large and the paper is doubled, the stepper motor in the potentiometer (5) will rotate the potentiometer under the control of the main control circuit board (6), causing it to rotate in the direction of increasing resistance. As the resistance increases, the current flowing to the high-speed negative pressure fan will decrease, and the speed of the high-speed negative pressure fan will decrease, thereby reducing the airflow for adsorbing paper. Regardless of whether the airflow is increased or decreased, the potentiometer will stop adjusting when the airflow is adjusted to just be able to adsorb a single sheet of paper. During this period, if the potentiometer (5) cannot solve the problem once, it can be automatically adjusted multiple times. After each adjustment of the potentiometer (5), the robot arm (2) will return to adsorb paper again until only a single sheet is adsorbed.

3. A method for adaptively adjusting the adsorption airflow during the automatic page-turning process of a booklet. When a fully automatic page-turning book scanner uses a vacuum pump as the air source for generating the adsorption airflow, the adaptive adjustment of its adsorption airflow can also be achieved using the method described in claim 2. The difference is that the components in the mechanism that implements this method are different. Its main components are a base (1), a robotic arm (2), a vacuum pump, an air pipe, an electrically adjustable airflow control valve, an airflow adsorption component, an ultrasonic component (4), and a main control circuit board (6). The biggest difference between this configuration and the configuration using a high-speed negative pressure fan as the air source is that the components of the air source and the components for adjusting the airflow are different. The adsorption airflow is generated by a vacuum pump, and the paper suction component (3) is changed from using a high-speed negative pressure fan to having adsorption holes. The airflow adsorption component of the channel is replaced by an electrically adjustable airflow control valve with a stepper motor (or servo motor). The electrically adjustable airflow control valve consists of a stepper motor (or servo motor) and a gas valve. The electrically adjustable airflow control valve is connected to the airflow adsorption component and the vacuum pump through the air pipe. The electrically adjustable airflow control valve is used to control the airflow rate. The stepper motor it carries is controlled by the main control circuit board (6). In this application, the actions and functions of the robot arm (2) and the ultrasonic component (4) are no different from those described in the previous paragraph. The control software algorithm is also similar. The difference in the control algorithm is that the angle parameter of the electrically adjustable airflow control valve is smaller each time it adjusts the rotation than the angle parameter of the electrically adjustable potentiometer (5) each time it adjusts the rotation.

4. According to claim 1, the paper detection process is characterized as follows: the robot arm (2) brings the paper suction component (3) and the ultrasonic component (4) close to the paper surface. After the paper suction component (3) is close to the paper surface, it will swing in the opposite direction by 40 to 50 degrees within 1 second under the drive of a motor inside the robot arm. Then, one telescopic component of the robot arm (2) brings the ultrasonic component over and stops at the position directly opposite the other ultrasonic component to perform paper re-tension detection. The dwell time is less than 0.5 seconds, and then it retracts to the original position.

Images