JPH04115013U - paper thickness gauge - Google Patents

Abstract

(57) [Summary] [Purpose] Regarding the paper thickness meter that is attached to the frame of the B/M meter and measures the thickness of the web, the paper thickness can measure the correct average value profile even if there is a fluctuation cycle in the flow direction. The purpose is to provide a [Structure] The scanning speed of the first and second paper thickness gauges 1 and 2 is controlled so that data can be collected for each half cycle in the web flow direction, and the first and second paper thickness gauges 1 and 2 The average paper thickness is calculated by calculating the sum of the data obtained from 1/2.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a paper thickness meter that is attached to the frame of a B/M meter and used to measure web thickness. Regarding the meter.

0002

[Conventional technology]

The paper thickness gauge is placed behind the calender part of the paper machine and scans across the width of the web. It is used to measure the paper thickness profile in the width direction of the web.

0003 The calendar then calculates the paper thickness profile in the width direction of the web detected by the paper thickness meter. The web is heated and cooled in accordance with the data to flatten the web.

0004

[Problem that the idea aims to solve]

However, in recent years, scanning speeds have been developed for high-speed response in such paper thickness gauges. There is a need to raise the standard.

[0005] Also, the width of each heating/cooling actuator module of the calendar can be narrowed or , there is a demand for fine-grained control by stacking two layers of modules. There is.

[0006] For this reason, as a paper thickness meter, the response speed should be increased and the measurement area should be as small as possible. Things are being done.

[0007] However, due to the eccentricity of the calender roll, there is a periodicity of 1 to 2 m in the web flow direction. There may be uneven thickness. For this reason, increasing the resolution of the paper thickness gauge in the width direction also increases the resolution in the machine direction. , there is a problem that the average value cannot be displayed in the profile.

[0008] The present invention was devised in view of the above problems, and its purpose is to reduce fluctuations in the flow direction. To provide a paper thickness meter that can measure a correct average value profile even if there is a period. It is in.

[0009]

[Means to solve the problem]

The present invention that solves the above problems is movably attached to the frame of a B/M meter. a first paper thickness meter, and a second paper thickness meter movably attached to the frame of the B/M meter. A paper thickness gauge and the first and second paper thickness gauges collect data every half cycle in the web flow direction. a control unit that controls the scanning speed so that each sample can be collected; An operation that calculates the sum of data obtained from the first paper thickness meter and the second paper thickness meter to 1/2. It is equipped with a calculation department.

0010

[Effect]

In the paper thickness gauge of the present invention, the control unit controls the first paper thickness gauge and the second paper thickness gauge to The scan speed is controlled so that data can be collected every half cycle.

[0011] Then, the calculation unit calculates the sum of the data obtained from the first paper thickness meter and the second paper thickness meter by 1. /2 and find the average thickness of the web.

0012

【Example】

Next, one embodiment of the present invention will be described using the drawings. Figure 1 illustrates one embodiment of the present invention. FIG. 2 is a diagram explaining the operation in FIG. 1.

[0013] First, in FIG. 1, a first paper thickness gauge 1 and a second paper thickness gauge 2 are B/M (not shown). It is movably attached to the frame of the meter.

[0014] The control unit 3 controls the half cycle of the paper (web) 4 in the flow direction (direction of arrow A in FIG. 1). These first and second paper thickness gauges 1 and 2 are used to collect data for each paper thickness. This controls the scanning speed.

[0015] Then, the calculation unit 5 calculates the sum of the data output from the first and second paper thickness gauges 1 and 2. This is to calculate 1/2.

[0016] Next, the operation of the above configuration will be explained using FIGS. 1 and 2.

[0017] First, the first and second paper thickness gauges 1 and 2 are fixed at fixed positions on the paper 4, and the fluctuations in the flow direction are measured. Analyze the period data.

[0018] Next, the obtained fluctuation period T (seconds/cycle) and the first and second sensors 1 and 2 are determined. The scan speed V is determined from the interval L (m). V=LT/((2n+1)/2)=2L/((2n+1)T) (m/sec) n=0,1,2,… The speed V can be set by a mechanism that attaches and scans a sensor. but, Since there is a speed range, consider n = 0, 1, 2,..., determine the appropriate value of n, and control section 3 The first and second paper thickness gauges 1 and 2 are scanned at this scanning speed V. Also, excerpts When the paper speed changes, the scan speed V is also changed.

[0019] Then, the calculation unit 5 calculates the measured value (μ+A) of the first paper thickness gauge 1 and the measurement value of the second paper thickness gauge 2. Take in the constant value (μ-A), calculate 1/2 of the sum of each measured value, and calculate the average value (μ). demand.

[0020] According to the above configuration, even if the scanning speed becomes high, the fluctuation period in the flow direction is The correct average value profile can be measured without being influenced by

[0021] Also, even if either one of the first paper thickness gauge 1 or the second paper thickness gauge 2 fails, the other You can continue measuring with a paper thickness meter.

[0022]

[Effect of the idea] As described above, according to the present invention, even if there is a fluctuation cycle in the flow direction, the A paper thickness meter capable of measuring an average value profile can be realized.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram illustrating an embodiment of the present invention.

FIG. 2 is a diagram illustrating the operation in FIG. 1.

[Explanation of symbols]

1 First paper thickness gauge 2 Second paper thickness gauge 3 Control section 4 Paper (web) 5 Arithmetic section

Claims (1)

[Scope of utility model registration request] 1. A first paper thickness meter (1) movably attached to the frame of a B/M meter, and a second paper thickness meter (1) movably attached to the frame of the B/M meter. 2) and
a control unit (3) that controls scanning speed so that the first and second paper thickness gauges (1, 2) can each collect data for each half cycle in the web flow direction; and a calculation unit (5) that calculates the sum of the data obtained from the paper thickness meter (1) and the second paper thickness meter (2) to 1/2;
A paper thickness gauge characterized by being equipped with.