JP2902922B2 - Measurement method and apparatus for sheet-like objects - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for measuring the temperature of a running sheet in a non-contact manner.

[0002]

2. Description of the Related Art For example, a vinyl sheet or the like is obtained by extruding a melted molding resin material from a molding roll, and the extruded vinyl sheet is continuously run and wound into a roll.

In order to measure the temperature, gloss, reflectivity, etc. of this sheet-like object during traveling as necessary, a non-contact type sensor such as a temperature sensor, a gloss sensor, a reflectivity sensor or the like is employed. The measurement information is obtained by reciprocating the sensor in the width direction of the sheet.

As shown in FIG. 9, a conventional measuring device is generally supported by a pair of fulcrums a at both ends and is provided with a rail or a feed screw shaft extending in the width direction of the sheet-like material b. One non-contact type sensor d is movably supported on the guide-like sensor support c along the longitudinal direction, and the sensor d is reciprocated by a stroke covering substantially the entire width of the sheet-like material b. It is configured to measure the surface temperature and the like of the object b. The sheet-like material b is shown in FIG.
Travel along the front and back sides of the paper on which is drawn.

[0005] Further, a calibration reference body e is disposed at a position near the outside of one side edge of the sheet-like material b, and the single sensor d is opposed to the calibration reference body e when necessary. By calibrating, the reliability of the measurement accuracy is improved.

[0006] Calibration of the sensor d is essential for the following reasons. That is, it is known that the sensitivity of the sensor d (including characteristics such as zero point fluctuation and gain) generally gradually decreases due to factors such as ambient temperature, ambient humidity, and contamination of the sensor d due to dust. Leaving the gradually decreasing sensitivity in this manner causes a measurement error, so that the sensitivity of the sensor d is adjusted to an appropriate sensitivity level by using the calibration reference body e at a necessary time such as periodically. Need to be calibrated to

Further, since the calibration reference body e cannot be arranged within the movement locus of the sheet-like material b, the calibration reference body e is located near the widthwise outside of the traveling sheet-like material b as described above. e is arranged.

[0008]

Incidentally, it is a basic premise that the measurement conditions are constant, not limited to the case of performing high-accuracy measurement. However, the sensor support c extending in the width direction of the sheet-shaped material B is only supported at both ends, and an intermediate portion excluding these both end portions is opposed to the sheet-shaped material b, and that portion is viewed from below. I can't support it.

Therefore, it cannot be prevented that the sensor support c is slightly downwardly convex due to its own weight. The same can occur due to temperature fluctuations and the like. Therefore, the distance between the sheet b and the sensor d is
The sensor d is narrowest when it is moved to the center in the width direction of the sheet-like material b, and gradually widens as both side edges of the sheet-like material b are moved.

Such a difference in distance and a change in the angle of the sensor d with respect to the sheet-like object b caused by the distance difference affect the sensitivity of the sensor d. The more it is moved from the calibration reference body e to the center in the width direction of the sheet-like material b, the less the expectation becomes. Therefore, there is a problem that high-precision measurement is difficult in the related art.

Conventionally, measurement is performed by reciprocating a single sensor d in the width direction of the sheet-like material b. Therefore, the measurement locus of the sensor d is shown in FIG. (The traveling direction of the object b is shown.) As shown by a dotted line, the sheet b largely meanders over substantially the entire width. Therefore, there is a problem that the measurement speed is slow, and there is a problem that the measurement density is coarse and the measurement is not suitable for the measurement of the sheet-like material b having a high running speed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a measuring method and apparatus for a sheet-like material which can realize high-accuracy measurement regardless of deformation of a sensor support, can increase a measuring speed, and can also increase a measuring density. is there.

[0013]

To achieve the above object, a measuring method for a sheet-like object according to the present invention comprises a plurality of non-contact sensors arranged at predetermined intervals along a width direction of a traveling sheet-like object. The provided sensor support is separated into a calibration reference body and the sheet-like object which are arranged at the outer side in the width direction of the sheet-like object at the predetermined interval from the sensor located at the end of the sensors. So that the sensor is reciprocated in the width direction of the sheet at the same stroke as the predetermined interval, and the sensor support is moved to the first position where the sensor located at the end is opposed to the calibration reference body. Then, while calibrating the sensor located at the end with the calibration reference body, each of the remaining sensors facing the sheet-like object measures a measurement location facing the sensor of the sheet-like material, and then, , The most And returning the sensor support a second position in which the position has been sensor facing the sheet,
After each of the sensors opposed to the sheet-like object measures each of the substantially same measurement points as the measurement points of the sheet-like object opposed thereto, the calibration reference body among the adjacent sensors measuring the substantially same measurement points The sensor information is corrected by correcting the measurement information of the other sensor far from the calibration reference body based on the measurement information of one sensor close to the other sensor, and the sensor support is moved by one stroke. Each time, a sensor group farther from the calibration reference body is successively repeated to calibrate all the sensors.

In order to achieve the same object, a measuring apparatus for a sheet-like object according to the present invention obtains measurement information on a traveling sheet-like object by a non-contact type sensor arranged to face the sheet-like object. In a sheet-like measuring device,
A sensor support that is provided to be reciprocally movable in the width direction of the sheet-like material and has a sensor mounting portion facing the sheet-like material, and is arranged at predetermined intervals along the width direction on the sensor mounting portion. A plurality of sensors provided, a calibration reference body disposed at a position outside the sheet in the width direction at the predetermined interval from the sensor located at the end,
A support driving means for reciprocating the sensor support at the same stroke as the predetermined interval along the width direction of the sheet-like material, and adjacent to each other which measures substantially the same measurement location on the sheet-like material by the reciprocation; Of the sensors, based on measurement information of the measurement location by one sensor close to the calibration reference body and measurement information of the measurement location by the other sensor far from the calibration reference body, the calibration reference body Processing means for calibrating the other sensor with reference to a calibrated sensor calibrated based on the sensor or an adjacent calibrated sensor calibrated based on the calibrated sensor.

[0015]

The method for measuring a sheet-like object according to the first aspect is used for the universal property (first property) of the sensor and the universal property (second property) of various properties such as the surface temperature of the traveling sheet-like article. Calibration. Here, the first property means that the sensor sensitivity does not suddenly decrease but progresses slowly in time as described above. For example, a change in ambient outside air temperature needs to be at least 1 to 10 minutes or more, and at least 1 hour to a year unit is required for adhesion and deposition of dust on the sensor even under poor use conditions. It is kind. The second property means that a change in the surface temperature or the like of the sheet-like material does not suddenly occur in the flow (running) direction of the sheet-like material but fluctuates continuously and gradually over time.

In this measuring method, a sensor support having a plurality of non-contact sensors arranged at intervals is reciprocally moved in the width direction of the sheet at the same stroke as the arrangement interval of the sensors. The sensor is calibrated one after another during each one-stroke movement.

That is, when the sensor support is moved to the first position, the sensor located at the end is opposed to the calibration reference body and is calibrated by this reference body. At this time, each of the other sensors opposes the sheet-like object, and measures various characteristics such as the surface temperature of the opposing part (measurement part).

Next, when the sensor support is moved to the second position, all the sensors face the sheet-like object and measure various characteristics at substantially the same locations as the above-mentioned respective measurement locations. The measurement of the substantially same location is performed by using a plurality of sensors to reduce the movement stroke of the sensor
This is possible by utilizing the property, and substantially the same measurement location is measured by adjacent sensors.

Then, an adjacent sensor (which has already been calibrated by the calibration reference body and has measured the substantially same measurement point as the sensor located closest to the end (one of the adjacent sensors which is closer to the calibration reference body)) The measurement information of the other sensor that is farthest from the calibration reference body among the adjacent sensors is corrected based on the measurement information with reference to the sensor located at the end, thereby calibrating the adjacent sensor. I do.

In this calibration, since the sensor located at the end, which is a reference, is used as a calibration reference for the adjacent sensor within a short time after being calibrated by the calibration reference body, the sensitivity decrease is caused by the first sensor. Utilization of the characteristic can be regarded as substantially non-existent, so that the calibration is performed accurately.

In this manner, each time the sensor support is moved by one stroke, the above-described calibration is performed, and the measurement information of one of the adjacent sensors near the calibration reference body among the adjacent sensors measuring substantially the same measurement location The measurement information of the other sensor distant from the calibration reference body is corrected based on the above, and the other sensor is calibrated. Therefore, the calibration of the sensor group far from the calibration reference body is performed by one stroke of the sensor support. Iteratively iteratively, all sensors can be calibrated.

Further, in this measuring method, various characteristics of the sheet-like material are measured by a plurality of sensors, so that the measurement density is increased, and the stroke for moving the sensor support is short as described above. And the measurement can be performed when the sheet-like object runs at a high speed.

In the sheet measuring device according to the second aspect,
The support driving means reciprocates the sensor support in the width direction of the sheet with the same stroke as the arrangement interval of the sensors juxtaposed to the sensor mounting portion. By this movement, the sensor located at the extreme end changes its position across the calibration reference body and the sheet-like object, and is calibrated by this reference body when facing the calibration reference body. Also, the processing means
Of the sensors adjacent to each other that measured the substantially same measurement point of the sheet-like object by the reciprocating movement, measurement information of the measurement point by one sensor close to the calibration reference body,
A calibrated sensor calibrated based on the calibration reference body or an adjacent calibration calibrated based on the calibrated sensor based on the measurement information of the measurement point by the other sensor far from the calibration reference body The other sensor is calibrated based on the completed sensor. Therefore, this measuring device implements the measuring method of the first aspect.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2 are diagrams showing a configuration of a sheet-like object temperature measuring device for carrying out the method of the present invention,
A ball screw 3 is mounted on the upper surface of one end of a fixed base indicated by reference numeral 1 via a bearing 2, and a rail 4 is mounted on the upper surface of the other end.
Is installed. The rail 4 is provided parallel to the ball screw 3 and substantially on an extension of the axis of the screw 3.

A pulse motor 5 to which one end of the ball screw 3 is connected is mounted on the gantry 1, and a control panel 6 is mounted on the motor 5 side.
Further, a sensor support 7 is provided on the gantry 1.

The sensor support 7 is in the shape of a rectangular frame that is horizontally long, and its upper frame is parallel to the gantry 1 and used as a sensor mounting portion 8. A moving element 3a in which the ball of the ball screw 3 is stored is provided in the lower frame 9 of the sensor support 7.
Are fixed, and the wheel 10 to be rolled is fixed, and the sensor support 7 is supported over the ball screw 3 and the rail 4 via these.

The ball screw 3, rail 4, pulse motor 5, and wheel 10 form support driving means. Therefore, the pulse motor 5 is driven by a predetermined number of drive pulses.
Is rotated forward or backward, whereby the sensor support 7 is moved with a predetermined stroke in the axial direction of the ball screw 3 and the rail 4.

A sheet 11 as a material to be inspected is passed through the inside of the sensor support 7. The sheet-like material 11 is, for example, a vinyl sheet obtained by extruding a melted molding resin material from a molding roll, and runs continuously between the sensor mounting portion 8 of the sensor support 7 and the lower frame portion 9. And wound up by a winding roll (not shown). In addition, the sheet-like material 11 runs along the front and back directions of the paper surface of FIGS. 1 and 2.

A plurality of, for example, four non-contact type sensors, such as temperature sensors, are provided along the longitudinal direction, in other words, along the width direction of the sheet material 11, on the sensor mounting portion 8 facing the sheet material 11. 12a to 12d are predetermined intervals S
Are juxtaposed. These sensors 12a to 12d non-contactly measure the temperature of the sheet 11 facing immediately below the sensor, and output an electric signal of a voltage level corresponding to the measured temperature.

A reference support 13 is mounted on the gantry 1 on the control panel 6 side, and a calibration reference 14 is mounted on the support 13. The calibration reference body 14 is arranged at a position outside the sheet-like material 11 in the width direction, and maintains a predetermined temperature. In addition, the calibration reference body 14 is provided between the temperature sensor 12a to 12d and the control panel 6 of the sheet-like material 11.
A plurality of sensors 12a to 12d are spaced apart from each other by a distance S with respect to the temperature sensor 12a disposed closest to one end on the side, and the temperature at the end position is moved with the movement of the sensor support 7. The sensor 12a is arranged to face right above.

In FIGS. 1 and 2, reference numeral 15 denotes a flexible cable wired between the control panel 6 and the sensor support 7. The cable 15 has a length that allows the sensor support 7 to move, and the measurement temperature (measurement information) of each of the temperature sensors 12a to 12d is input to the control panel 6 via the cable 15 and the calibration reference body The control output for 14 is provided from the control panel 6 to the calibration reference body 14.

As shown in FIGS. 1 and 2, the control panel 6 comprises a processing means 16 formed by an electronic circuit and a pulse motor drive circuit 1 for controlling the operation of the pulse motor 5.
7 and a computer display 18 such as a CRT. The pulse motor drive circuit 17 causes the sensor support 7 to reciprocate with the interval S as a stroke by rotating the pulse motor 5 forward or backward by a predetermined number of applied drive pulses at predetermined time intervals.

The structure of the processing means 16 is shown in FIG. In FIG. 3, reference numerals 19a to 19d denote sensor signal amplifiers provided for the respective temperature sensors 12a to 12d, and A / D converters 20a to 20d are provided at their output terminals. Connected separately. Each of the converters 20a to 20d performs multi-value A / D conversion, and its output terminal is connected to the computer 21. Reference numeral 22 in FIG. 3 denotes a calibration reference body control circuit for maintaining the temperature of the calibration reference body 14 at a set temperature CA.

The computer 21 is connected to each of the temperature sensors 12a
To 12d are provided with correction coefficient registers Ra to Rd (not shown) as calculation units respectively corresponding to the calculation coefficients. It is desirable that the values of the correction coefficients set in the correction coefficient registers Ra to Rd be automatically updated at predetermined time intervals.
By doing so, it is possible to eliminate the possibility that the correction coefficients set in the correction coefficient registers Ra to Rd fluctuate during a long time.

Next, a measuring procedure by the measuring device having the above-described configuration will be described. First, after the calibration reference body 14 is maintained at a known predetermined temperature by the calibration reference body control circuit 22, the sensor support 7 is moved to the first position as an initial position, in other words,
As shown in FIG. 1, the sensor 12 a located closest to the control panel 6 side among the temperature sensors 12 a to 12 d is arranged at a first position facing the calibration reference body 14.

In this initial state, the temperature of the surface of the sheet-like material 11 passing through the sensor support 7 is reduced by the temperature sensors 12b.
~ 12d. In FIG. 3 and FIG. 4A for explaining the operation, Pa to Pd are temperature sensors 12a to 12d.
It shows a measurement point of the sheet-like material 11 located immediately below 12d.

In this measurement, as shown in FIG. 4A, the temperature sensor 12a measures the temperature of the calibration reference body 14, and the temperature sensor 12b adjacent thereto measures the temperature of the measurement point Pa. A temperature sensor 12c adjacent to the sensor 12b measures the temperature of the measurement point Pb,
The temperature sensor 12d adjacent to c measures the temperature of the measurement point Pc.

Here, for example, the temperature of the calibration reference body 14 is Co, the temperature of the measurement point Pa is TAa, and the measurement point P is
Assuming that the temperature of b is TAb and the temperature of the measurement point Pc is TAc, the respective temperature sensors 12a to 12a
The measurement information (electric signal) is amplified by 2d, converted into digital data having a value corresponding to a voltage value corresponding to the temperature, and input to the computer 21.

Next, since the pulse motor driving circuit 17 is controlled by the computer 21, the operation of the pulse motor 17 causes the sensor support 7 to move along the width direction of the sheet-like material 11, and It is arranged at the second position shown in FIG. Then, at this position, the temperature is measured by each of the temperature sensors 12a to 12d. In the second position, the temperature sensor 12 located at the end
a faces the sheet 11 and all the other temperature sensors 12b to 12d also face the sheet 11.

In this case, since the mutual distance S between the temperature sensors 12a to 12d and the mutual distance S between the endmost temperature sensor 12a and the calibration reference body 14 are the same,
By being moved to the position, the temperature sensor 12a faces substantially the same location as the measurement location Pa, and the temperature sensor 12b adjacent thereto faces the substantially same location as the measurement location Pb,
The temperature sensor 12c adjacent to the sensor 12b faces substantially the same location as the measurement location Pc, and the temperature sensor 12d adjacent to the sensor 12c is connected to the measurement location Pd.
The temperature is measured at these locations in opposition to substantially the same locations.

The term "substantially the same place" means the same in the width direction of the sheet-like object 11, but means that the position in the longitudinal direction is shifted because the sheet-like object 11 is running. The change in the temperature characteristic of the sheet-like material 11 does not suddenly occur in the flow (running) direction of the sheet-like material 11, but changes continuously and gradually over time. In addition, since the movement stroke (the interval S) of the sensors 12a to 12d is small, even if the measurement position in the flow direction is slightly shifted as described above, substantially the same measurement point is measured. Can be considered.

In the measurement at the second position, the temperature of the measuring point Pa is TBa, the temperature of the measuring point Pb is TBb, the temperature of the measuring point Pc is TBc, and the temperature of the measuring point Pd is TB.
d, the temperature sensors 1 whose respective temperatures face each other
The measured information is amplified by 2a to 12d, amplified, converted into digital data having a value corresponding to a voltage value corresponding to the temperature, and input to the computer 21.

Then, the computer 21 successively calibrates the temperature sensors 12a to 12b by arithmetic processing based on the temperature information CA, Co and TAa to TAc and TBa to TBd inputted thereto.

In this calibration, the temperature sensor 12a located at the end is calibrated as follows. That is, the correction coefficient register Ra corresponding to the temperature sensor 12a
(A correction coefficient, which is represented by Ra for convenience) is Co
= CA · Ra is calculated from the relational expression Ra = Co / CA. As described above, for the temperature sensor 12a, a true temperature measurement value can be obtained by multiplying the measurement value by the correction coefficient Ra. That is, the temperature sensor 1
2a can be calibrated.

The measurement point Pa is defined by the temperature sensor 12.
Temperature sensor 12b, which measures with a (which is adjacent to temperature sensor 12a), is calibrated as follows. That is, assuming that the true temperature of the measurement point Pa is Ta, this temperature Ta is obtained by a relational expression of Ta = TBa · Ra. Then, the value of the correction coefficient register Rb corresponding to the temperature sensor 12a (a correction coefficient, which is represented by Rb for convenience) is Ta = TBa · Ra and Ta = TBa · Rb, so that Rb = Ra · (TBa / TAa) is obtained by calculation using the calculation formula.

Thus, by multiplying the value measured by the temperature sensor 12b by the correction coefficient Rb, the true temperature Ta at the measurement point Pa can be measured. That is, the calibration reference body 14
The temperature sensor 12a which has already been calibrated by the above method can calibrate the adjacent temperature sensor 12b as a calibration reference.

Here, Ta = TBa · Ra = TBa
The establishment of the relational expression of Rb is based on the universal property, that is,
The second characteristic that the temperature characteristic of the sheet-like material 11 changes continuously and gradually over time without abruptly occurring in the flow (running) direction of the sheet-like material 11 and the temperature characteristics of the temperature sensors 12a to 12d. This is based on the above-mentioned first property that the sensitivity lowers gradually with time.

Next, the sensor support 7 is moved to the position shown in FIG.
As shown in FIG. 5, the temperature sensor 12a is
4 is returned to the first position. Based on the temperature measurement at the first position, the temperature sensor 12a is re-calibrated as described above, and at the same time, the adjacent temperature sensors 12b and 12c that have measured the measurement point Pb
Of the temperature sensors 12c located farther from the calibration reference body 14, the temperature sensor 1c closer to the calibration reference body 14
Calibration is performed using 2b as a calibration reference. The calibration method is
In relation to the temperature sensors 12a and 12b, the procedure is the same as that for calibrating the temperature sensor 12b farther from the calibration reference body 14 using the temperature sensor 12a closer to the calibration reference body 14 as a calibration reference. Is omitted.

Next, as shown in FIG. 4 (D), the temperature sensor 12a is connected to the calibration support 14 again.
Is returned to the second position so as to face. Based on the temperature measurement at the second position, the temperature sensor 12b is re-calibrated as described above, and at the same time, of the adjacent temperature sensors 12c and 12d that have measured the measurement point Pc, The temperature sensor 12d located farther from the reference body 14 is connected to the temperature sensor 12d closer to the calibration reference body 14.
Calibration is performed using c as a calibration reference. The method of calibration is the same as the procedure of calibrating the temperature sensor 12b using the temperature sensor 12a as a calibration reference in relation to the temperature sensors 12a and 12b as described above.

That is, as described above, of the temperature sensors adjacent to each other which have measured substantially the same measurement points, the other temperature sensor which is far from the calibration reference body 14 is based on the measurement information of one temperature sensor which is close to the calibration reference body 14. The measurement information of the temperature sensor is corrected and the other temperature sensor is calibrated, and this calibration is sequentially repeated for the temperature sensor group farther from the calibration reference body 14 each time the sensor support 7 is moved by one stroke. , All the temperature sensors 12a to 12d can be calibrated.

Therefore, despite the fact that the sensor mounting portion 8 of the sensor support 7 is bent due to its own weight, a change in temperature, or the like,
Since the measurement error is reduced by the calibration, highly accurate temperature measurement can be realized.

In addition, in the above measurement, the temperature characteristics of the sheet 11 are measured by a plurality of temperature sensors 12a to 12d instead of a single one.
The measurement trajectory of 2d is shown in FIG.
1 shows the traveling direction. ) As shown by the middle dotted line, it is meandered with a small width, and the measurement density can be increased.

In addition, a plurality of temperature sensors 12a to 12d
, The movement stroke of the sensor support 7 is shortened, and therefore the measurement speed is increased,
It is possible to cope with the measurement when the sheet-like material 11 runs at high speed.

The present invention is not limited to the first embodiment. For example, the lower frame 9 of the sensor support 7 is used as a sensor mounting portion as in the second embodiment shown in FIG.
The same number of temperature sensors 12a 'to 12d' as those of the sensors 12a to 12d are mounted at the same intervals S, and the temperature sensors 12a 'face the lower surface of the calibration reference body 14 to measure the temperature in a non-contact manner. In this way, the surface temperature of the traveling sheet-like material 11 may be measured from both sides. Since the configuration other than the above is the same as that of the first embodiment, including the points not shown, the description thereof is omitted, but the second embodiment can also achieve the initial object of the present invention.

As shown in the third embodiment of FIG. 7, a pair of calibration reference bodies 14A and 14B are provided on the outer side in the width direction of the sheet-like material 11 and on both sides thereof, respectively. Each time the actuator 7 is moved by one stroke, the calibration is sequentially performed from the temperature sensor 12a of the one calibration reference body 14A to the temperature sensor 12d of the other calibration reference body 14B, and at the same time, the temperature sensor of the other calibration reference body 14B is 12d
The calibration may be sequentially performed from to the temperature sensor 12a on the one calibration reference body 14A side. In this case, the calibrations for the same temperature sensor shall be summed and averaged. The configuration other than the above is the same as that of the first embodiment, including the points not shown, and the description thereof is omitted. However, the third embodiment can also achieve the initial object of the present invention. Of course, there is an advantage that the accuracy of calibration can be further improved by the averaging process.

As shown in the fourth embodiment in FIG. 8, at least one of the widthwise outer positions of the sheet 11 is
A plurality of, for example, two calibration reference bodies 14a and 14b may be arranged and arranged at an interval S from each other. Since the configuration other than the above is the same as that of the first embodiment including the points not shown, the description thereof will be omitted, but the fourth embodiment can also achieve the initial object of the present invention. Of course, by performing calibration using the plurality of calibration reference bodies 14a and 14b, there is an advantage that the accuracy of calibration can be further improved. In this case, the reference values such as the temperatures of the calibration reference bodies 14a and 14b may be different from each other.

The present invention can be applied not only to the measurement of the temperature but also to the measurement for detecting a printing defect or a printing density defect when a running sheet is printed. Measurement for detecting defects, or
Surface roughness, thickness, transparency, gloss,
The present invention can also be applied to measurement for detecting moisture content, reflectance, metal powder mixed into a sheet material, and the like. In addition to the temperature sensor, one-dimensional CCD sensor, distance sensor, photodiode,
Eddy current sensors, infrared moisture sensors, gloss sensors, reflectance sensors, and the like can be used.

[0058]

As described above in detail, in the measuring method and apparatus for a sheet-like object according to the present invention, a sensor support having a stroke at the predetermined interval of a plurality of non-contact sensors arranged in parallel at a predetermined interval. By the reciprocating movement of the sensor, the measurement information by one sensor close to the calibration reference body and the measurement information by the other sensor far from the calibration reference body among the adjacent sensors that measure substantially the same measurement location on the sheet-like object are also displayed. And
The calibration is performed to calibrate the other sensor based on a calibrated sensor calibrated based on the calibration reference body or an adjacent calibrated sensor calibrated based on the calibrated sensor. Despite the deformation caused by
A high-precision measurement can be realized, the measurement speed can be improved, and the measurement density can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing a configuration of a measuring apparatus for performing a measuring method according to a first embodiment of the present invention in a state where a sensor support is moved to a first position.

FIG. 2 is a schematic front view showing the configuration of the measuring device according to the first embodiment in a state where the sensor support is moved to a second position.

FIG. 3 is a block diagram showing a circuit configuration of a processing unit included in the measuring apparatus according to the first embodiment.

FIGS. 4A to 4D are diagrams for explaining a measuring operation by the measuring device according to the first embodiment.

FIG. 5 is a diagram showing a measurement locus of a temperature sensor for a sheet-like material in the first embodiment.

FIG. 6 is a schematic front view showing a configuration of a measuring device according to a second embodiment of the present invention.

FIG. 7 is a schematic front view showing a configuration of a measuring device according to a third embodiment of the present invention.

FIG. 8 is a schematic front view showing a configuration of a measuring apparatus according to a fourth embodiment of the present invention.

FIG. 9 is a diagram schematically showing a configuration of a temperature measuring device according to a conventional example.

FIG. 10 is a diagram showing a measurement locus of a temperature sensor for a sheet-like material in the conventional example.

[Explanation of symbols]

3 ball screw (support driving means), 3a mover (support driving means), 4 rail (support driving means),
5 ... Pulse motor (support driving means), 7 ... Sensor support, 8 ... Sensor mounting part, 10 ... Wheel (support driving means), 11 ... Sheet, 12 ... Temperature sensor (sensor), 14 ... Calibration Reference body, 16 ...
Processing means, S: interval.

Continuation of front page (58) Fields investigated (Int.Cl. ⁶ , DB name) G01D 18/00 G01D 21/00 G01K 13/06 G01B 11/06 G01B 15/02 G01B 17/02 G01G 17/02

Claims (2)

(57) [Claims] 1. A sensor support in which a plurality of non-contact sensors are arranged at predetermined intervals along a width direction of a traveling sheet-like object, and a sensor support is arranged from the sensor located at the end of each of the sensors to the predetermined position. To reciprocate in the width direction of the sheet-like object at the same stroke as in the width direction of the sheet-like object, so as to pass between the calibration reference body and the sheet-like object arranged at an outer position in the width direction of the sheet-like object at intervals, The sensor located at the extreme end moves the sensor support to a first position facing the calibration reference body, and the sensor located at the extreme end is calibrated by the calibration reference body, and the sheet-like sensor is calibrated. The measurement points facing the sensor of the sheet-like object are measured by the remaining sensors facing the object, respectively. Support Returning, after measuring each of the measurement points of the sheet-like object facing the sheet-like object with the sensors facing the sheet-like object, respectively, substantially the same measurement points, The measurement information of the other sensor far from the calibration reference body is corrected based on the measurement information of one sensor close to the calibration reference body, and the other sensor is calibrated. A sheet-like object measuring method, wherein each time the sensor is moved, a sensor group farther from the calibration reference body is sequentially and repeatedly calibrated for all sensors. 2. A sheet measuring device for obtaining measurement information on a running sheet by a non-contact type sensor arranged opposite to the sheet, wherein the sheet reciprocates along a width direction of the sheet. A sensor support that is freely provided and has a sensor mounting portion facing the sheet-like material; a plurality of sensors arranged side by side at predetermined intervals along the width direction on the sensor mounting portion; A calibration reference body disposed at a position outside the sheet-like object in the width direction at a predetermined distance from the located sensor; and the same stroke as the predetermined distance along the width direction of the sensor-like support along the sensor support. A support driving means for reciprocating the sensor, and one of the sensors adjacent to each other which measures substantially the same measurement point on the sheet-like object by the reciprocating movement, the sensor being closer to the calibration reference body And measurement information of the measurement point with,
A calibrated sensor calibrated based on the calibration reference body or an adjacent calibration calibrated based on the calibrated sensor based on the measurement information of the measurement point by the other sensor far from the calibration reference body A measuring means for calibrating the other sensor based on the completed sensor.