JP2000055644A - In-line measuring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce idleness for a system, and to eliminate inconvenience for system update. SOLUTION: In this measuring system, a control generalizing device 5 for controlling generally respective in-line measuring instruments 3a, 3b introduces image informations for a work required for recognition of the work from the measuring instruments 3a, 3b, to generate individual informations (work pattern, position, important dimension and the like) of the work based on the image informations. The respective measuring instruments 3a, 3b select parametric part programs based on the individual informations, and execute the respective part programs using the individual informations as arguments. Since recognition processing is conducted generally in the control generalizing device 5, a data base or the like required for the processing is used in common.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-line measuring system in which an in-line measuring machine is arranged along a transport line.

[0002]

2. Description of the Related Art A system for automatically measuring various works having different shapes conveyed through a conveyance line has been conventionally known (for example, Japanese Patent Application Laid-Open No. Sho 60-35210). In this type of system, a workpiece is imaged by an imaging device arranged upstream of the line, the shape of the workpiece is determined from the imaging result, and a measuring robot arranged downstream of the line is operated by a program corresponding to the determined shape. Like that.

[0003] When a dimension measurement of a work is performed by a CMM as in this system, a probe used by the CMM and a moving path of the probe are given by a part program for controlling the CMM. Can be Therefore,
Even if the work has the same shape, if the position where it is placed and the dimensional value such as inner diameter, outer diameter, height, etc. are different, create part programs corresponding to each position and dimensional value and prepare Must be kept.

Accordingly, the applicant has provided means for capturing each work as external information capturing means and recognizing the position, size and shape of the work. External information such as the position, dimensions and shape from the external information capturing means is provided. Is proposed as an argument of a parametric part program, so that various kinds of workpieces having different positions and different dimensional values can be measured by one kind of part program (Japanese Patent Application Laid-Open No. H8-14876). ).

[0005]

However, in a measuring system in which a plurality of in-line measuring machines are arranged along a transport line, if the above-mentioned external information taking-in means is provided for each of the in-line measuring machines, the in-line measuring machines are not provided. Since the same database is referred to during the recognition process, the database is duplicated as a whole system, and when the database is changed, the database of each in-line measurement device must be changed. There is such a problem. In addition, this type of recognition processing may be necessary even for a machine tool provided on a transport line, and in this case, the database is duplicated between the machine tool and the inline measuring machine.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide an in-line measurement system capable of reducing waste of the system and saving time for updating the system.

[0007]

SUMMARY OF THE INVENTION An in-line measuring system according to the present invention comprises one or more in-line measuring devices arranged along a transport line for transporting an object to be measured and sequentially measuring the object on the transport line. An in-line measurement system comprising: a control control device for controlling the in-line measuring device; and communication means for transferring necessary information between the control control device and each of the in-line measuring devices. The apparatus introduces information necessary for recognition of the device under test on the transport line from the in-line measuring device via the communication unit, and refers to a database based on this information to obtain individual information of the device under test. The in-line measuring device generates and transmits the individual information of the device under test via the communication means, and transmits the information to the in-line measuring device via the communication means. Characterized in that it is intended to perform a measurement operation based on the parametric part program individual information is input as an argument.

[0008] Further, another in-line measuring system according to the present invention comprises one or more in-line measuring machines arranged along a transport line for transporting an object to be measured and sequentially measuring the object to be measured on the transport line; An in-line measurement system including a control control device that controls the in-line measuring device, and a communication unit that transfers necessary information between the control control device and each of the in-line measuring devices, wherein the control control device includes: Introducing information necessary for recognizing the device under test on the transport line from the in-line measuring device via the communication unit, and referring to a database based on this information to generate individual information of the device under test. At the same time, select a parametric part program in which this individual information is input as an argument and, together with the individual information, perform the in-line measurement via the communication means. The in-line measuring device introduces the individual information of the device under test and the selected parametric part program via communication means, and based on the parametric part program in which the individual information is input as an argument. In which the measuring operation is performed.

According to the present invention, the control and control device that controls each of the in-line measuring devices collectively introduces information necessary for recognizing the device to be measured from the in-line measuring device, and based on this information, the device to be measured. Generate individual information. A parametric part program input with the individual information as an argument is selected, and measurement processing in each in-line measuring device is performed using the individual information as an argument. And, since the recognition process required for generating individual information is performed in a centralized manner by the control and control device, the database required for recognition can be shared by each inline measuring machine, machine tool, etc. Since the waste of the system can be eliminated and the database can be updated in a unified manner, the work efficiency is improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an in-line measurement system according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing a schematic configuration of this system. In this system, machine tools 2a, 2b, 2c such as a machining center, a grinding machine, and a washing machine, and in-line measuring machines 3a, 3b are arranged along a transfer line formed by the transfer device 1. It is possible to consistently perform processing from inspection of the workpiece (work) flowing along it to inspection. The transport control device 1a for controlling the transport device 1, the machine tools 2a, 2b, 2c and the in-line measuring machines 3a, 3b are connected to an RS23 as communication means.
The control and control device 5 is connected to the control and control device 5 via a serial bus 4 such as 2C, and is controlled by the control and control device 5.

As the in-line measuring machines 3a and 3b, for example, a multi-dimensional coordinate measuring machine, an image measuring machine, a surface texture measuring machine and the like are used. Assuming that the in-line measuring device 3a is a three-dimensional measuring device, the configuration is, for example, as shown in FIG. In FIG. 2, an in-line measuring device 3a includes a three-dimensional measuring device 11 having a touch signal probe, a stage moving mechanism 12 for moving the measuring stage, and an image of an object to be measured (work) set on the measuring stage. CCD
An image capturing device 13 such as a camera and a coordinate measuring machine control device 14 for controlling these devices and outputting measured values and image information to the outside are provided. The CMM control device 14 includes a controller 15 that controls the CMM 11 and the stage moving mechanism 12 based on control data from the control control device and measurement data from the CMM 11, and a CMM A CMM data processing device 16 for processing the measurement data from the data processing device 11 and outputting the measurement results processed by the data processing device 16 and the image data from the imaging device 13 to the serial bus 4, And an external control device 17 that takes in the control data of

Assuming that the in-line measuring device 3b is an image measuring device, the configuration is as shown in FIG. 3, for example. FIG.
, An in-line measuring device 3b includes an image measuring device 22 including an imaging device 21, a stage moving mechanism 23 for moving the measuring stage, and an image measuring device for controlling these and outputting measured values and image information to the outside. Machine control device 2
4 is provided. The image measuring device control device 24 also includes a controller 25, an image measuring device data processing device 26, and an external control device 27, similarly to the coordinate measuring device control device 14.

FIG. 4 shows the in-line measuring device 3 shown in FIG.
3A is a functional block diagram of the coordinate measuring machine data processing device 16 and the external control device 17 in FIG. The CMM data processing device 16 has a pattern-specific parametric part program (hereinafter referred to as a “PP program”) database 3 for performing measurement control of the CMM 11.
1, a PP program selection unit 32, a PP program execution unit 33, a measurement data processing unit 34, and a variable register 35 are provided. The external control device 17 includes a data input / output unit 36, a measurement / control command decoding unit 37, and a measurement result decoding unit 3.
8 are provided.

The image data from the image pickup device 13 is output to the serial bus 4 as a video signal only during the image pickup instruction commanded by the control and control device 5 via the data input / output unit 36. Various control data provided from the control control device 5 including the individual information of the work generated by the control control device 5 based on the image data by the processing described later are measured / control command decoding via the data input / output unit 36. It is provided to the section 37 and decrypted. Here, the information of the work position and the work main dimension included in the individual information is given to the variable register 35, and the work pattern information and the measurement / control command included in the individual information are supplied to the PP program selection unit 32. The PP program selection unit 32 stores a pattern-specific PP program database 31 based on the work pattern information.
The PP program of the designated pattern is selected from and the supplied program is supplied to the PP program execution unit 34. The PP program execution unit 34 substitutes the individual information stored in the variable register 35 for the argument part of the supplied PP program, and executes the PP program while referring to the measurement data from the coordinate measuring machine 11. The measurement data thus obtained is sent from the measurement data processing unit 34 to the measurement result decoding unit 3
8, decrypted based on information from the PP program execution unit 33, and output to the serial bus 4 via the data input / output unit 36.

On the other hand, as shown in FIG. 5, the control and supervising device 5 includes a CPU 4 connected to each other via an internal bus 40.
1, a memory 42, an input / output interface 43, and an external control device 44, an image processing device 45, an input device 46, an output device 47, and an auxiliary storage device 48 connected to the internal bus 40 via the input / output interface 43. It is configured. The external control device 44 inputs and outputs control data to and from the external serial bus 4 and supplies image data supplied from the outside to the image processing device 45. The image processing device 45 processes the supplied image data to recognize the individual information of the work. The input device 46 is a keyboard, an operation panel, and the like, and the output device 47 is a CRT display, a printer, and the like. The auxiliary storage device 48 is a hard disk, a floppy disk, a magneto-optical disk (MO), or the like.

FIG. 6 is a functional block diagram of the control control device 5. The control control device 5 includes an external control device 44.
The control / overall processing device 51 is configured by the other parts. The external control device 44 includes a data input / output unit 52, a measurement / control command decoding unit 53, and a measurement / control result decoding unit 54, similarly to the external control device 17 of FIG. The control / overall processing device 51 includes an image processing unit 55, a coordinate system correction unit 56,
A work individual information database 57 and a sequence control unit 58 are provided.

Image data supplied from the outside is supplied to an image processing unit 55 via a data input / output unit 52. The image processing unit 55 recognizes a work pattern, a work position, a work main dimension, and the like from the image data. Coordinate system correction unit 5
6 corrects the work position in the image processing coordinate system to a position in the coordinate system of the three-dimensional measuring machine based on the recognized work position. Then, the obtained information on the work pattern, the work main dimension and the corrected work position is given to the work individual information database 57 as individual information.
On the other hand, the sequence control unit 58 inputs a measurement result from the outside via the measurement / control result decoding unit 54, and the measurement result is registered in the database 57 in association with the individual information.
The individual information of the work is output to the inline measuring devices 3a and 3b via the measurement / control command decoding unit 53 and the data input / output unit 52 as selection information and arguments of the PP program in the inline measuring devices 3a and 3b.

Next, the operation of the present system configured as described above will be described. FIG. 7 is a time chart showing the task execution state of the control and control device 5, and the horizontal axis is time. As shown in FIG. 7A, the control and control device 5 executes the measurement processing on a plurality of works flowing on the transport line by multitasking. For example, the in-line measuring device 3a starts the execution of the measurement sequence A on the work WA, and before the measurement of the work WA is completed, starts the measurement sequence B to start the measurement of the work WB. Further, as shown in FIG. 7B, when it is necessary to perform measurement using the measurement sequence X and the measurement sequence Y on the same work WA, the control By describing two instructions for executing X and the measurement sequence Y, both measurements can be performed automatically and continuously. This is called a macro function. Note that the abnormality monitoring task is always executed in parallel with these measurement sequences,
Each part is constantly monitored for abnormalities.

FIG. 8 is a flowchart of the abnormality monitoring task. Abnormal events are detected from the transfer device 1, the stage moving mechanisms 12 and 23, and the measuring machines 11 and 22, respectively (S110, S120, S130), and a stop command for transfer, stage and measurement is output (S111, 121, 13).
1) Input the abnormal data (S112, S122, S
132) Display (S113, S123, S133).
Repeat this. In order to perform self-diagnosis of the abnormality of the measuring devices 11 and 22, for example, a method of measuring a master work with a known calibration value and checking a change in the measurement value at regular time intervals may be considered. Here, only the abnormality detection of each part is described as an example, but an actual transport device or a three-dimensional measuring machine can output various kinds of information in real time, such as the progress of a currently executed part program. In such a case, it is also possible to constantly monitor such information and display the contents thereof.

FIG. 9 is a flowchart showing a procedure for executing a measurement sequence in the control and control unit 5. First, the operator designates the name and number of the measurement sequence from the input device (operation panel) 46 and starts a series of measurements. The measurement sequence includes multiple in-line measuring instruments 3
The measurement procedure (the type of the work and the order of the measuring machines to be used) is determined by a and 3b. The measurement sequence is input in advance from the auxiliary storage device 48 or stored in the work individual information database 57 using a keyboard or the like. When the measurement sequence is designated and execution is started (S1), the contents (commands) of the measurement sequence are sequentially taken out of the database 57 under the control of the sequence control unit 58 and interpreted by the measurement / control command decoding unit 53. According to the contents, a command is output to the transport device 1 and the in-line measuring devices 3a and 3b (S2). At this time, the actual transmission and reception of commands and data between the transport device 1 and the measuring devices 3a and 3b are performed by the external control device 44 in accordance with communication processing described later.

If the transporting apparatus 1 and the corresponding measuring machine 3a or 3b are not in a halt state, the process stands by.
The corresponding measuring machine 3a or 3
Load the work into b. When the loading is completed (S5), the control and control device 5 starts a measurement task described later (S5).
6) Hereafter, a multitask process in which the process of this flow and the measurement task are executed simultaneously. When the measurement task is completed (S7), a command to carry out the work is output from the corresponding measuring machine 3a or 3b (S8), and the work is returned from the measuring machine 3a or 3b to the work place in the transfer device 1. When the unloading is completed (S9), it is checked whether or not all the measurement sequences are completed (S10). When all the instructions of the measurement sequence have been executed, the process returns to the top and waits for an instruction to execute the next measurement sequence (S10). .

Next, details of the measurement task will be described. FIG.
0 is a flowchart of the measurement task. When the control control device 5 outputs an imaging command to the measuring device 3a or 3b at the start of the measurement, the work is placed on a pallet or the like and is carried into the imaging region, and the work is imaged by the imaging device 13 for a certain period. 5 is input with image data (S21). At this time, by irradiating the work with illumination light from an appropriate direction, clear image information in which the contrast between the work part and the background is enhanced as shown in FIG. 11 can be obtained. When the image data is supplied to the image processing unit 55, the image processing unit 55 calculates preliminary information from the supplied image data (S22). That is, as shown in FIG. 12, after the image data is binarized by the binarization unit 61, the edge part of the binary image is extracted by the contour extraction unit 62. Subsequently, in order to increase the processing efficiency of pattern matching, a feature portion is extracted from the contour information by the feature extraction unit 63, and this feature portion and some basic patterns stored in the basic pattern storage unit 64 are compared with the matching unit 65. Is collated. Thereby, based on the obtained work pattern, the position calculating section 66 and the main dimension calculating section 67 calculate the main dimensions such as the position and the inner diameter, the outer shape, the height, and the width of the work from the characteristic portion of the image. As a result, preliminary information including a work pattern, a work position, and a work main dimension is obtained (S22).

Next, the work position in the image processing coordinate system obtained by the image processing unit 55 is converted into a work position in the coordinate system of the coordinate measuring machine by the coordinate system correction unit 56 (S2).
3) The work position after the conversion, the work pattern and the work main dimension given from the image processing unit 55 are stored in the work individual information database 57 (S24). continue,
Under the control of the sequence control unit 58, the data of the work pattern, the work position and the work main dimension are transmitted to the in-line measuring machine 3a or 3b, and a PP program selection command (S25) is sent to the variable register 35. Are sequentially output. When the stage loading command (S27) is output, the stage moving mechanism 12 is controlled under the control of the controller 15 of the in-line measuring device 3a.
Is operated, the slide table is moved from the imaging area to the measurement area by a predetermined movement amount, and the work is transported to the measurement area.

When the transfer of the work is completed (S28), the measurement command is transferred (S29), and the PP program execution unit 3
3 is started, and the selected PP program is executed. The PP program is provided with variables such as the amount of movement of the probe and information specifying the selected probe, and can flexibly cope with works of various sizes. 13 and 14 are diagrams illustrating an example of the PP program. Here, V1, V2, V3,..., U9, U1
Numerals 0, L9 and the like are variables. Numerical values corresponding to these variables are given from the image processing unit 55, obtained by an operation inside the PP program, and stored in the variable register 35. This example is an example of measuring the inner and outer diameters of a cylinder. For example, V1 is the depth of the cylinder, V2 is the number of measurement points, V3 is the diameter, V20
Indicates the number of sections to be measured, and U9 indicates the type of probe.

In the course of executing the PP program, the PP program execution unit 33 refers to the contents of the variable register 35 as needed, and supplies a probe movement command and a necessary movement amount to the controller 15 to supply the same to the CMM 11. Is moved according to the PP program. Thereby, automatic measurement is performed. In addition, the PP program execution unit 33 obtains the position of the work from the actual three-dimensional measurement values obtained in the course of the measurement, and replaces the predetermined work position with the work position obtained from the actual measurement values. As a result, the subsequent measurement is performed with reference to the newly obtained accurate work position.

When the measurement is completed (S30), a command to transmit the measurement data from the in-line measuring device 3a to the control and control device 5 is output (S31), and the measurement data is input via the serial bus 4 (S32). , Data input / output unit 5
2. Measurement / control result decoding unit 54 and sequence control unit 5
The measured data is stored in the individual information database 57 of the work through the interface 8 (S33). Then, a carry-out command of the stage moving mechanism 12 is output (S34), and the work is moved from the measurement area to the imaging area. When the unloading is completed, the measurement operation ends (S35).

FIGS. 15 and 16 are flowcharts showing the procedure of the process to be executed by the external control device 17 of the in-line measuring device 3a in the above process. First, a command or an event includes a command from the control control device 5 and the coordinate measuring machine 1.
Since there is an event from No. 1, it is checked from which command or event (S 41), and in the case of a command from the control and control device 5, a process corresponding to the content of the command is executed. In this example, as an instruction, an imaging instruction (S42),
There are a PP program selection command (S44), a variable register storage command (S46), a stage loading command (S48), a measurement command (S50), a measurement data sending command (S52), and a stage unloading command (S54). Output the image data to the serial bus 4 (S
43), a PP program selection instruction (S45), a variable register storage instruction (S47), a stage loading instruction (S4)
9), a measurement instruction (S51), transmission of measurement data to the serial bus 4 (S53), and a stage unloading instruction (S55) are executed.

In the case of an event from the coordinate measuring machine 11 (S61), a stage loading completion event (S6)
2), measurement completion event (S64), stage unloading completion event (S66), stage abnormal event (S6)
8), a measurement abnormal event (S70), etc., and the stage loading is completed for each of these events (S6).
3) Measurement completed (S65), stage unloading completed (S6)
7) Output information to the serial bus 4 to notify the stage abnormality (S70) and the measurement abnormality (S72).

The external control device 44 of the control control device 5
Also performs basically the same processing as this, and thus details are omitted. According to this system, the control and supervising device 5 comprehensively recognizes the information of the work of each of the inline measuring devices 3a and 3b, and recognizes the recognition result.
a, 3b, which is used as an argument of the PP program and for selection of the PP program. Therefore, there is no duplication of a circuit for recognition processing of a work, a database used for recognition processing, and the like. This makes it possible to reduce the cost and easily cope with the change of the database.

In the above embodiment, the pattern-specific PP program database 31 and the PP program selecting section 32 are provided in the in-line measuring machine 3a, but these are provided in the control and control device 5 to communicate the selected PP program. The data may be transmitted to each in-line measuring device via the means.

[0031]

As described above, according to the present invention, since the recognition processing required for generating individual information is performed by the control and control device in an integrated manner, a database required for recognition is created. Since it can be shared by each in-line measuring machine, machine tool, etc., the waste of the system can be reduced and the database can be updated in a unified manner.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of an in-line measurement system according to an embodiment of the present invention.

FIG. 2 is a block diagram of an in-line measuring device of the system.

FIG. 3 is a block diagram of another in-line measuring device of the same system.

FIG. 4 is a detailed functional block diagram of the coordinate measuring machine control device of the in-line measuring machine.

FIG. 5 is a block diagram of a control control device in the system.

FIG. 6 is a functional block diagram of the control control device.
You.

FIG. 7 is a time chart showing a task execution state of the system.

FIG. 8 is a flowchart showing an abnormality monitoring task of the system.

FIG. 9 is a flowchart of a measurement sequence execution task of the system.

FIG. 10 is a flowchart of a measurement task of the system.

FIG. 11 is a diagram illustrating an example of image data obtained by an imaging device in the system.

FIG. 12 is a functional block diagram of an image processing unit of the control control device in the system.

FIG. 13 is a diagram showing an example of a PP program used in the system.

FIG. 14 is a diagram showing a program following FIG. 14;

FIG. 15 is a flowchart showing a processing procedure of an external control device in the system.

FIG. 16 is a continuation of the flowchart in FIG. 15;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Conveying apparatus, 1a ... Conveying control apparatus, 2a-2c ... Machine tool, 3a, 3b ... In-line measuring machine, 4 ... Serial bus, 5 ... Control supervision apparatus.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Nobuyuki Nakazawa 1-1-20 Sakado, Takatsu-ku, Kawasaki-shi, Kanagawa Prefecture Mitutoyo Co., Ltd. (72) Koichi Komatsu 1-1-20-1, Sakado, Takatsu-ku, Kawasaki-shi, Kanagawa No. Mitutoyo Co., Ltd. (72) Inventor Koji Suzuki 1-20-1 Sakado, Takatsu-ku, Kawasaki City, Kanagawa Prefecture (72) Inventor Ryoichi Yoshiki 1-1-20 Sakado, Takatsu-ku, Kawasaki City, Kanagawa Prefecture Shares F term (reference) in Mitutoyo Corporation 2F069 AA04 AA31 AA99 GG01 GG04 GG07 GG58 HH30 JJ13 NN00 PP06

Claims (8)

[Claims] 1. A measuring device arranged along a transport line for transporting an object to be measured and sequentially measuring the object on the transport line.
Or a plurality of in-line measuring machines, an in-line measuring system comprising a control device for controlling the in-line measuring device, and a communication means for transferring necessary information between the control controlling device and each of the in-line measuring devices. The control and control device introduces information necessary for recognizing the object to be measured on the transport line from the in-line measuring device via the communication means, and refers to a database based on the information to determine the object to be measured. The individual information of the measured object is generated and transmitted to the in-line measuring device via the communication unit.The in-line measuring device introduces the individual information of the device under test via the communication unit, and the individual information is An in-line measurement system for performing a measurement operation based on a parametric part program input as an argument. 2. A method for measuring an object to be measured on a transfer line, which is arranged along a transfer line for transferring the object to be measured.
Or a plurality of in-line measuring machines, an in-line measuring system comprising a control device for controlling the in-line measuring device, and a communication means for transferring necessary information between the control controlling device and each of the in-line measuring devices. The control and control device introduces information necessary for recognizing the object to be measured on the transport line from the in-line measuring device via the communication means, and refers to a database based on the information to determine the object to be measured. Generating individual information of the measurement object, selecting a parametric part program in which the individual information is input as an argument, and transmitting the selected parametric part program together with the individual information to the in-line measuring device via the communication means; The measuring device introduces the individual information of the device under test and the selected parametric part program through communication means, and An in-line measurement system for performing a measurement operation based on the parametric part program to which information is input as an argument. 3. The in-line measuring device includes an image pickup unit for picking up an image of an object to be measured, and converts image information obtained by the image pickup unit into information necessary for recognition of the object to be measured via the communication unit. The image processing apparatus according to claim 1, wherein the image processing apparatus transmits an image to the control control apparatus, and the control control apparatus includes an image processing apparatus that recognizes a shape and a position of the measured object from the transmitted image information as individual information. Inline measurement system as described. 4. A part program storage means storing the parametric part program; a part program selection means for selecting one part program from the part program storage means based on the individual information; 2. The inline measurement system according to claim 1, further comprising: a part program executing means for executing the part program selected by the part program selecting means by giving the individual information as an argument. 5. The control and control device includes: a part program storage unit that stores the parametric part program; a part program selection unit that selects one part program from the part program storage unit based on the individual information; 3. The in-line measurement system according to claim 2, further comprising: means for transferring the part program selected by the part program selection means together with the individual information to the in-line measurement device via the communication means. 6. The inline measurement system according to claim 1, wherein the individual information of the object to be measured is transmitted from the control and control device to the communication unit in synchronization with the conveyance of the object to be measured by the carrier device. 7. The control control device according to claim 1, further comprising an individual information database for storing the measurement result from the in-line measuring device together with the individual information of the device under test. Inline measurement system according to the item. 8. The in-line measurement system according to claim 1, wherein the control and supervising device constantly monitors an abnormal event from the in-line measurement device.