The present application is based on, and claims priority from JP Application Serial Number 2018-222341, filed Nov. 28, 2018, the disclosure of which is hereby incorporated by reference herein in its entirety.

BACKGROUND

1. Technical Field

The present disclosure relates to a learning device, a fibrous feedstock recycling apparatus, a learning method, and a storage medium.

2. Related Art

In the related art, there is known an apparatus provided with a transporting mechanism which transports a sheet-like target recording medium using rollers (for example, refer to JP-A-2004-58518). The apparatus described in JP-A-2004-58518 includes a sensor which detects slack in a target recording medium, driving the rollers at a low speed in a state in which slack is not detected in the target recording medium by the sensor, and switching to driving the rollers at a medium speed when slack is detected.

In the configuration described in JP-A-2004-58518, there is a problem in that transporting of a target recording medium becomes unstable due to fluctuation in the speed of rollers. For example, the influence of individuality or a disturbance in the motor or the like which drives the rollers may become factors in causing the speed of the rollers to fluctuate. It is difficult to avoid speed fluctuation in the rollers caused by such factors.

SUMMARY

According to an aspect of the present disclosure, there is provided a learning device using, as a learning target, a transporting apparatus provided with a first roller which transports web-like or sheet-like transport target matter and a second roller disposed downstream of the first roller in a transport path of the transport target matter, a rotation control section which controls at least one of a rotation speed of the first roller and a rotation speed of the second roller, and a position detection section which detects a position of the transport target matter in a direction intersecting the transport path between the first roller and the second roller, the learning device including a state variable acquisition section which acquires a state variable and a detection result of the position detection section, the state variable being based on information of a state of the transport target matter and information of an environment to which the transport target matter is exposed, and a learning section which learns an operational expression for calculating a control value of the rotation control section based on a dataset containing the state variable acquired by the state variable acquisition section and the detection result of the position detection section.

The learning device may be configured to further include an evaluation section which evaluates a transporting state of the transport target matter based on a detection result of the position detection section and the learning section may perform learning using the dataset containing an evaluation result of the evaluation section.

The learning device may be configured to further include a communication section which communicates with the transporting apparatus and the state variable acquisition section may acquire the state variable and the detection result of the position detection section from information received by the communication section.

In the learning device, a configuration may be adopted in which the state variable acquisition section acquires information relating to a humidity to which the transport target matter is exposed as the state variable.

In the learning device, a configuration may be adopted in which the state variable acquisition section acquires information relating to a temperature to which the transport target matter is exposed as the state variable.

In the learning device, a configuration may be adopted in which the operational expression is an expression for calculating the control value relating to the rotation speed of the second roller.

According to another aspect of the present disclosure, there is provided a fibrous feedstock recycling apparatus including a web forming section which forms a web from a feedstock containing fibers, a web transport section which transports the web formed by the web forming section, and a control section, in which the web transport section includes a first roller which transports the web and a second roller disposed downstream of the first roller in a transport path of the web, and a position detection section which detects a position of the web in a direction intersecting the transport path between the first roller and the second roller, the control section includes a rotation control section which controls at least one of a rotation speed of the first roller and a rotation speed of the second roller, a state variable acquisition section which acquires a state variable relating to a state of at least one of the web forming section and the web transport section, and a learning section which learns an operational expression for calculating a control value of the rotation control section based on a dataset containing the state variable acquired by the state variable acquisition section and a detection result of the position detection section, and the control section controls at least one of the first roller and the second roller using the rotation control section based on the control value calculated based on the operational expression.

In the fibrous feedstock recycling apparatus, a configuration may be adopted in which the control value relating to the rotation speed of the second roller is calculated based on the operational expression.

In the fibrous feedstock recycling apparatus, a configuration may be adopted in which the position detection section includes a proximity sensor installed between the first roller and the second roller or an encoder.

In the fibrous feedstock recycling apparatus, a configuration may be adopted in which the state variable acquisition section acquires a humidity of the transport path as the state variable.

In the fibrous feedstock recycling apparatus, a configuration may be adopted in which the state variable acquisition section acquires a temperature of the transport path as the state variable.

The fibrous feedstock recycling apparatus may be configured to further include a pressure sensor which detects a pressure of exhaust that carries the feedstock and the state variable acquisition section may acquire a detection value of the pressure sensor as the state variable.

In the fibrous feedstock recycling apparatus, a configuration may be adopted in which the web forming section is provided with a hollow sieve portion which sieves a material containing fibers, an accumulating section which accumulates the material sieved by the sieve portion, and an ultrasonic wave sensor which detects the material in an inner portion of the sieve portion, and the state variable acquisition section acquires a detection value of the ultrasonic wave sensor as the state variable.

In the fibrous feedstock recycling apparatus, a configuration may be adopted in which the web forming section is provided with a thickness measuring section which measures a thickness of the web, and the state variable acquisition section acquires a measurement value of the thickness measuring section as the state variable.

According to still another aspect of the present disclosure, there is provided a learning method using, as a learning target, a transporting apparatus provided with a first roller which transports web-like or sheet-like transport target matter and a second roller disposed downstream of the first roller in a transport path of the transport target matter, in which the transporting apparatus controls a rotation speed of the first roller and a rotation speed of the second roller, the method including detecting a position of the transport target matter in a direction intersecting the transport path between the first roller and the second roller, acquiring a state variable which changes a state of the transport target matter, and learning an operational expression for calculating a control value of the rotation speeds of the first roller and the second roller based on a dataset containing the detected position of the transport target matter between the first roller and the second roller and the state variable.

According to still another aspect of the present disclosure, there is provided a non-transitory computer-readable storage medium storing a program configured to be executed by a computer which is provided with a first roller which transports web-like or sheet-like transport target matter and a second roller disposed downstream of the first roller in a transport path of the transport target matter, and which controls a rotation speed of the first roller and a rotation speed of the second roller, the program including an operational expression for calculating a control value of the rotation speeds of the first roller and the second roller, the operational expression being learned based on a dataset containing a position of the transport target matter in a direction intersecting the transport path detected between the first roller and the second roller and a state variable which changes a state of the transport target matter, and controlling the rotation speeds of the first roller and the second roller based on the control value calculated based on the operational expression.

