CN111156947A

CN111156947A - Paper roll diameter measuring device and measuring method

Info

Publication number: CN111156947A
Application number: CN202010082992.2A
Authority: CN
Inventors: 张佰涵; 周友幸; 胡超; 李新义; 龙仲智
Original assignee: Changsha Chaint Machinery Co Ltd
Current assignee: Chaint Corp
Priority date: 2020-02-07
Filing date: 2020-02-07
Publication date: 2020-05-15

Abstract

The device for measuring the diameter of the paper roll comprises a cylinder, a gear rack, a measuring rod, a coder, an electromagnetic valve, a photoelectric switch, a PLC (programmable logic controller), an upright column, a base and a chain plate machine. The gear shaft is connected with the encoder coupler, the gear bar is meshed with the gear, and the measuring rod is connected with the extending end of the cylinder and the gear; after the photoelectric switch at the fixed position senses the paper roll, the electromagnetic valve is electrified, the cylinder stretches out to push the measuring rod to move downwards, the gear is driven to rotate to be meshed with the gear strip, the encoder measures the descending distance, and the diameter numerical value of the paper roll is obtained through conversion. The whole process does not need manual control, and the equipment can work in the occasion with extremely bad temperature.

Description

Paper roll diameter measuring device and measuring method

Technical Field

The invention belongs to the field of automatic control of conveying and packaging equipment, and particularly relates to a paper roll diameter measuring device and a paper roll diameter measuring method suitable for paper roll packaging, automatic warehousing and other occasions.

Background

The paper roll specification measurement relates to width and diameter information. The diameter information is mainly acquired by relying on an ultrasonic sensor, and the diameter information of the paper roll is calculated through the sending and receiving time. The method needs an ultrasonic sensor, but the ultrasonic sensor is very expensive, cannot accurately measure the diameter of the paper roll, is obviously interfered by the external environment, is not suitable for severe environments, and has great influence on the cost of some projects.

Disclosure of Invention

The invention aims to provide a paper roll diameter measuring device and a paper roll diameter measuring method based on an encoder, which have the advantages of good working stability, high sensitivity and good real-time performance and can be suitable for occasions with severe conditions.

The purpose of the invention is realized by the following technical scheme:

the paper roll diameter measuring device comprises a cylinder, a gear bar, a measuring rod, an encoder, an electromagnetic valve, a photoelectric switch, a PLC (programmable logic controller), a stand column, a base, a chain plate machine and an encoder coupler, wherein the gear is meshed with the gear bar, and a gear shaft is connected with the encoder coupler; the measuring rod is connected with the gear and the extending end of the cylinder, and the cylinder base is reversely fixed at the top end of the upright post.

Furthermore, a magnetic switch is arranged at the head part and the tail part of the cylinder respectively to improve the measurement sensitivity.

The measuring method of the paper roll diameter measuring device comprises the following steps:

(1) the paper roll is detected by a photoelectric switch and stops at a preset position, and the PLC drives the electromagnetic valve to push the air cylinder through the air pipe;

(2) the cylinder extends out to drive the gear to rotate, so that the encoder rotates and transmits signals to the PLC;

(3) when the measuring rod touches the paper roll, the PLC calculates the moving distance L of the measuring rod;

(4) calculating the diameter of the paper roll to be H-L through the length H of the measuring rod from the surface of the chain plate conveyor measured in advance;

(5) the PLC sends a signal to enable the cylinder to return to wait for the next measurement signal;

the invention is based on the encoder measuring the distance traveled and calculating the total height of the roll based on a predetermined measurement

The diameter value; the accuracy of the distance measured by the encoder is improved through gear engagement. The whole process does not need manual control, and the equipment can be suitable for occasions with extremely bad temperature and is not limited by the environment; and the method is easy to realize, low in cost and accurate in detection.

Drawings

FIG. 1 is a front view of a roll diameter measuring device.

FIG. 2 is a top view of the structure of the paper roll diameter measuring device.

Figure 3 is an enlarged view of the encoder and gearing of the web measuring device.

In the figure: 1-cylinder, 2-gear, 3-gear bar, 4-measuring rod, 5-encoder, 6-electromagnetic valve, 7-photoelectric switch, 8-PLC, 9-upright post, 10-base, 11-chain plate conveyor, 12-encoder coupler, 13-magnetic switch, H-total height of support, L-measuring rod moving distance.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

As shown in figure 1, the paper roll diameter measuring device comprises a 1-cylinder, a 2-gear, a 3-gear bar, a 4-measuring rod, a 5-encoder, a 6-electromagnetic valve, an 8-PLC, a 9-upright post, an 11-chain plate conveyor and a 12-encoder coupler. The 2-gear and the 3-gear bar are meshed together, and the gear shaft is connected with the 12-encoder coupler; the 4-measuring rod is connected with the 2-gear and the extending end of the 1-cylinder, and the 1-cylinder base is reversely fixed at the top end of the upright post. The 1-cylinder extends out to drive the 2-gear to rotate, and the 2-gear moves downwards due to the fact that the 3-gear strip is meshed with the 2-gear, and the 4-measuring rod is driven to move downwards. The 2-gear rotation can drive the encoder coupler to rotate, so that the 5-encoder sends signals to the 8-PLC, the moving distance L of the 4-measuring rod is calculated through the processing of the 8-PLC, and finally the size of the diameter of the paper roll is converted through the height H of the 4-measuring rod and the plane of the 11-chain plate conveyor which are measured in advance.

The head and the tail of the cylinder are respectively provided with a 13-magnetic switch, and when the cylinder extends to the right position and retracts to the right position, the 8-PLC receives corresponding position signals so as to improve the measurement sensitivity.

As shown in figures 2 and 3, the circuit diagram comprises a cylinder 1, a solenoid valve 6, a photoelectric switch 7, a PLC 8, a column 9, a base 10, a scraper chain conveyor 11 and an encoder shaft 12. When the photoelectric switch senses a paper roll, the 8-PLC receives a signal, the 11-chain plate conveyor stops advancing, the 8-PLC drives the 6-electromagnetic valve to enable the 1-air cylinder to extend out, the 2-gear and the 3-gear strip are meshed for rotation, and the 5-encoder sends a signal to the 8-PLC.

(1) the paper roll is detected to stop at a preset position through a 7-photoelectric switch, and an 8-PLC drives an electromagnetic valve to push a 1-cylinder through an air pipe;

(2) 1, extending out an air cylinder to drive a 2-gear to rotate, further rotating a 5-encoder, and simultaneously transmitting a signal to an 8-PLC;

(3) when the 4-measuring rod touches the paper roll, the 8-PLC calculates the moving distance L of the 4-measuring rod;

(4) calculating the diameter of the paper roll to be H-L through the pre-measured 4-measuring rod distance 11-length H of the surface of the chain plate conveyor;

(5) 8-PLC sends a signal to enable the 1-cylinder to return to wait for the next measurement signal;

the invention fully solves the problem of measuring the diameter of the paper roll. In terms of sensitivity, the sensitivity is particularly high as long as the 4-measuring rod measures exactly at the home position distance 11-the distance H between the apron conveyors. For the aspect of applicability, the ultrasonic wave ultrasonic generator can be applied to most occasions, and the limitation that the ultrasonic wave cannot be applied is broken. The whole system has no redundant expensive devices, so the cost of the whole system is very low, and the initial estimation is that the price of the ultrasonic sensor is less than half.

Claims

1. Scroll diameter measurement device, its characterized in that: the device comprises an air cylinder, a gear bar, a measuring rod, an encoder, an electromagnetic valve, a photoelectric switch, a PLC (programmable logic controller), an upright post, a base, a chain plate machine, an encoder coupler and the like, wherein the gear and the gear bar are meshed together, and a gear shaft is connected with the encoder coupler; the measuring rod is connected with the gear and the extending end of the cylinder, and the cylinder base is reversely fixed at the top end of the upright post.

2. The paper roll diameter measuring device according to claim 1, characterized in that: the head and the tail of the cylinder are respectively provided with a magnetic switch.

3. The measuring method of the paper roll diameter measuring device is characterized by comprising the following steps of:

(5) and the PLC sends a signal to enable the cylinder to return to wait for the next measuring signal.