CN103175476A - Pipe material length automatic measurement devices and measurement method thereof - Google Patents

Abstract

The invention relates to length measurement equipment, particularly to pipe material length automatic measurement devices and a measurement method thereof. Each of the two pipe material length automatic measurement devices comprises a positioning detection mechanism, a driving mechanism and a base. The positioning detection mechanism and the driving mechanism are arranged on the base. The positioning detection mechanism which is connected with the driving mechanism is driven through the driving mechanism to perform reciprocating motion on the base. The measurement method includes that the bilateral sides of pipe materials to be measured are respectively provided with an automatic measurement device and a distance between zero points of the two automatic measurement devices is known; the positioning detection mechanism of each of the two automatic measurement devices moves towards a direction of the pipe materials to be measured and stops when end faces which are arranged at two ends of the pipe materials to be measured are detected to obtain respective displacement distances of the bilateral positioning detection mechanisms; and the distance between the zero points of the two automatic measurement devices subtracts the respective displacement distances of the bilateral positioning detection mechanisms to obtain a length of the pipe materials to be measured. The pipe material length automatic measurement devices have the advantages of achieving length automatic measurement and being simple in structure. The measurement method of the pipe material length has the advantages of saving time and effort and achieving rapid and reliable detection.

Description

An automatic measuring device for pipe material length and its measuring method

technical field

The invention relates to length measuring equipment, in particular to an automatic measuring device and a measuring method for the length of pipe material.

Background technique

Large-diameter thick-walled industrial pipes play an important role in industrial production. This type of pipe is made of thick steel plates crimped and welded. The length measurement of each section of welded pipe has always been an urgent problem for steel pipe processing enterprises. The traditional length measurement method is measured by the operator with a tape measure. This method mainly has the following disadvantages:

1. More than two people are required to cooperate, and the operation is cumbersome;

2. The method of manually reading the tape will bring artificial reading errors;

3. After the manual reading, it needs to be manually entered into the computer, which is prone to errors.

Under the general trend of industrial automation production, the measurement of product process parameters requires automation, so the traditional method of measuring by people can no longer meet the needs of automated production.

Contents of the invention

In order to solve the above-mentioned shortcomings of the traditional manual length measurement method, the object of the present invention is to provide an automatic pipe length measurement device and its measurement method.

The purpose of the present invention is achieved through the following technical solutions:

The automatic measuring device of the present invention includes a positioning detection mechanism, a driving mechanism and a base, wherein the positioning detection mechanism is installed on the base, the driving mechanism is installed on the base, the positioning detection mechanism is connected with the driving mechanism, and the driving mechanism is driven by the driving mechanism. Move back and forth on the base.

Wherein: two parallel linear guide rails are installed on the base, and the positioning detection mechanism reciprocates along the linear guide rails; the driving mechanism includes a servo motor, a ball screw and a screw nut, wherein the servo motor is installed on the base Above, the two ends of the ball screw are respectively connected to the base in rotation, and the end of the ball screw away from the pipe material to be tested passes through the base to connect with the output shaft of the servo motor, and rotates with the output shaft of the servo motor. The ball screw is threaded with a screw nut; one side of the servo motor is provided with a proximity switch installed on the base to detect whether the positioning detection mechanism is at zero; the servo motor has an encoder; the positioning The detection mechanism includes a sliding table, a bracket and a photoelectric switch, wherein the sliding table is connected to the driving mechanism, one end of the bracket is installed on the sliding table, and the other end is equipped with a photoelectric switch for detecting the end surface of the pipe material; the two ends of the sliding table are respectively installed with Each bracket is "L" type, the horizontal side of the "L" type bracket is parallel to the upper surface of the base, the vertical side of the "L" type bracket is perpendicular to the upper surface of the base, and the photoelectric switch is located in the " The top of the vertical edge of the L"-shaped bracket; the two photoelectric switches are at the same height.

Measurement method of the present invention is:

On both sides of the pipe material to be tested, automatic measuring devices are placed respectively, the distance between the zero points of the two automatic measuring devices is known, and the positioning detection mechanism in each automatic measuring device is driven by its own drive mechanism to When the positioning detection mechanism on both sides detects the end faces of the two ends of the pipe material under test, the positioning detection mechanism stops, and the respective moving distances of the positioning detection mechanisms on both sides are obtained, which are subtracted from the distance between the zero points of the two automatic measuring devices. The respective moving distances of the positioning and detection mechanisms on both sides are the length of the pipe material to be tested.

Before the test, the positioning detection mechanisms on both sides return to the zero position, measure the distance between the zero points of the automatic measuring device on both sides of the tested pipe material, and then let the servo motors of the drive mechanism on both sides of the tested pipe material drive the automatic measuring device The positioning detection mechanism of each side moves to the pipe under test at the same time. When the photoelectric switch of any side of the positioning detection After the detection mechanism stops, record the moving distance of the positioning detection mechanism on both sides, and subtract the respective moving distance of the positioning detection mechanism on both sides from the distance between the zero points of the two automatic measuring devices to get the length of the pipe material to be tested.

Advantage of the present invention and positive effect are:

1. The present invention has a novel structure, adopts switch detection and servo motor drive to realize automatic length measurement, simple process and reliable connection.

2. Due to the fast and reliable servo positioning method, the entire detection process saves time and effort, and realizes fast and reliable detection, so that the online length measurement time is guaranteed.

3. The present invention can ensure the reliability and high efficiency of the whole detection process.

Description of drawings

Fig. 1 is the structural representation of measuring device of the present invention;

Among them: 1 is the servo motor, 2 is the ball screw, 3 is the nut, 4 is the slide table, 5 is the bracket, 6 is the photoelectric switch, 7 is the linear guide, 8 is the base, and 9 is the tube material to be tested;

Fig. 2 is the structural principle diagram of measuring device of the present invention;

Fig. 3 is a control flow chart of the measurement method of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Fig. 1 and Fig. 2, the automatic measuring device of the present invention includes a positioning detection mechanism, a driving mechanism and a base 8, wherein two mutually parallel linear guide rails 7 are installed on the base 8, and the positioning detection mechanism is installed on the straight line of the base 8. On the guide rail 7 , the drive mechanism is installed on the base 8 , the positioning detection mechanism is connected with the drive mechanism, and is driven to reciprocate horizontally along the linear guide rail 7 by the drive mechanism.

The driving mechanism includes a servo motor 1, a ball screw 2 and a screw nut 3, wherein the two ends of the ball screw 2 are respectively connected to the base 8 in rotation, and the end of the ball screw 2 away from the tube material 9 to be tested passes through the base 8, It is connected with the output shaft of the servo motor 1 installed at this end of the base 8 through a coupling, and rotates with the output shaft of the servo motor 1 , and a screw nut 3 is threaded on the ball screw 2 . One side of the servo motor 1 is provided with a proximity switch installed on the base 1 to detect whether the positioning detection mechanism is at the zero point, and the servo motor 1 has an encoder.

The positioning detection mechanism includes a slide table 4, a bracket 5 and a photoelectric switch 6, wherein the slide table 4 is fixedly connected to the nut 3, and the two ends of the slide table 4 are respectively connected with the linear guide rails 7; the two ends of the slide table 4 are respectively installed with Support 5, each support 5 is " L " type, and the horizontal edge of " L " type support 5 is parallel with the upper surface of base 1 , and the vertical edge of " L " type support 5 is perpendicular to the upper surface of base 1; " L " The horizontal side of " type support 5 is fixedly connected with slide table 4, and the top of the vertical side of " L " type support 5 is provided with the photoelectric switch 6 that detects the end face of pipe material, two photoelectric switches 6 on two supports 5 are located same height.

In order to realize the automatic control of the automatic measuring device of the present invention, a photoelectric switch 6 (material detection switch) is installed on the support 5, the servo motor 1 has an encoder, and a proximity switch is installed on the side of the base 8 near the servo motor 1. Among them, the photoelectric switch 6 (material detection switch) detects whether the positioning detection mechanism moves to the end of the measured pipe material 9, the encoder is used for real-time feedback of the position of the slide table 4, and the proximity switch is used for the slide table 4 to return to zero when the system is powered on detection.

Measurement method of the present invention is:

On both sides of the measured pipe material 9, automatic measuring devices are respectively placed, the distance between the zero points of the two automatic measuring devices is known, and the positioning detection mechanism in each automatic measuring device is driven by its own drive mechanism to the measured pipe material. 9, when the positioning detection mechanism on both sides detects the end faces of the two ends of the pipe material 9 to be tested, the positioning detection mechanism stops, and the respective moving distances of the positioning detection mechanisms on both sides are obtained, which is determined by the zero point between the two automatic measuring devices. The distance minus the respective moving distances of the positioning detection mechanisms on both sides is the length of the measured pipe material 9 .

Before detection, the positioning detection mechanisms on both sides return to the zero position, measure the distance between the zero points of the automatic measuring device on both sides of the tested pipe material 9, and then let the servo motor 1 of the drive mechanism on both sides of the tested pipe material 9 drive The positioning detection mechanism of the automatic measuring device moves to the measured pipe material 9 at the same time, and when the photoelectric switch 6 of the positioning detection mechanism on any side detects the end face of the measured pipe material 9 on this side, it sends out a signal, and then stops the side positioning detection mechanism Move, when the positioning detection mechanisms on both sides are stopped, record the moving distance of the positioning detection mechanisms on both sides, and subtract the respective moving distances of the positioning detection mechanisms on both sides from the distance between the zero points of the two automatic measuring devices to get the measured pipe material 9 length.

As shown in Figure 3, the measurement method of the present invention is specifically as follows:

In this embodiment, a tube with a diameter of 2 m and a length of 8 m is used as an example. Start, start the self-inspection program, initialize parameters and mechanisms; parameters include: the distance between the zero points of the positioning detection mechanism in the automatic measuring device on both sides is 14m; the distance between the center line of the two photoelectric switches 6 on each side and the zero point is 0m; the slide table The running speed of 4 is 0.8m/s; the initialization of the mechanism completes the zero-returning action of the positioning detection mechanism on both sides of the pipe material 9 under test.

Whether to start detection is judged by the external signal, which is the enable signal provided by the upper system; if allowed, the servo motor 1 of the driving mechanism drives the ball screw 2 to rotate, thereby driving the slide table 4 and the bracket 5 and the photoelectric switch 6 on it go ahead;

When the photoelectric switch 6 on the support 5 detects the end face of the pipe material 9 to be tested, the advancement of the slide table 4 is stopped;

Record the pulse readings of the encoders on both sides at this time;

Carry out length measurement data calculation (that is, the distance between the zero points of the positioning detection mechanism in the automatic measuring device on both sides is 14m minus the moving distance of the positioning detection mechanism on each side);

The positioning detection mechanism on both sides returns to the zero position driven by the driving mechanism;

The calculation result is provided to the upper mechanism for storage, and the controller sends a length measurement completion signal to the upper computer, waiting for the length measurement of the next pipe material.

In this embodiment, the PLC-200 controller produced by Siemens is used as the main control component, the proximity switch is the proximity switch produced by Turck, and the photoelectric switch 6 (material detection switch) is the photoelectric switch produced by Yamatake.

Claims (10)

1. materials in the tube length self-operated measuring unit, it is characterized in that: comprise positioning detection mechanism, driving mechanism and base (8), wherein positioning detection mechanism is arranged on base (8), described driving mechanism is arranged on base (8), described positioning detection mechanism is connected with driving mechanism, and the driving by driving mechanism moves back and forth on described base (8).

2. by materials in the tube length self-operated measuring unit claimed in claim 1, it is characterized in that: two line slideways that are parallel to each other (7) are installed on described base (8), and described positioning detection mechanism moves back and forth along line slideway (7).

3. by the described materials in the tube length of claim 1 or 2 self-operated measuring unit, it is characterized in that: described driving mechanism comprises servomotor (1), ball-screw (2) and screw (3), wherein servomotor (1) is arranged on described base (8), the two ends of described ball-screw (2) are rotationally connected with respectively base (8), ball-screw (2) is passed with the output shaft of described servomotor (1) by base (8) away from an end of tested materials in the tube (9) and is connected, output shaft rotation with servomotor (1), screw (3) has been threaded on described ball-screw (2).

4. by materials in the tube length self-operated measuring unit claimed in claim 3, it is characterized in that: the approach switch that a side of described servomotor (1) is provided with and is arranged on that base (1) is upper, whether detection and location testing agencies is positioned at zero point.

5. by materials in the tube length self-operated measuring unit claimed in claim 3, it is characterized in that: described servomotor (1) is with scrambler.

6. by the described materials in the tube length of claim 1 or 2 self-operated measuring unit, it is characterized in that: described positioning detection mechanism comprises slide unit (4), support (5) and optoelectronic switch (6), wherein slide unit (4) is connected with driving mechanism, one end of support (5) is arranged on slide unit (4), and the other end is provided with the optoelectronic switch (6) that detects the materials in the tube end face.

7. by materials in the tube length self-operated measuring unit claimed in claim 6, it is characterized in that: the two ends of described slide unit (4) are separately installed with support (5), each support (5) is " L " type, the horizontal edge of " L " type support (5) is parallel with the upper surface of described base (1), the vertical edge of " L " type support (5) is perpendicular to the upper surface of base (1), and described optoelectronic switch (6) is positioned at the top of the vertical edge of " L " type support (5).

8. by materials in the tube length self-operated measuring unit claimed in claim 7, it is characterized in that: the residing height of two optoelectronic switches (6) is identical.

9. measuring method by the described materials in the tube length of claim 1 self-operated measuring unit, it is characterized in that: the both sides in tested materials in the tube (9), place respectively self-operated measuring unit, the distance of two self-operated measuring units between zero point is known, positioning detection mechanism in each self-operated measuring unit drives by driving mechanism separately, direction to tested materials in the tube (9) moves, when the positioning detection mechanism of both sides detects the two ends end face of tested materials in the tube (9), positioning detection mechanism stops, draw both sides positioning detection mechanism displacement separately, deduct both sides positioning detection mechanism displacement separately by the distance of two self-operated measuring units between zero point and but be the length of tested materials in the tube (9).

10. by measuring method claimed in claim 9, it is characterized in that: before detection, the positioning detection mechanism of both sides is all got back to null position, measure the distance of tested materials in the tube (9) both sides self-operated measuring unit between zero point, then allow the servomotor (1) of driving mechanism of tested materials in the tube (9) both sides drive the positioning detection mechanism of self-operated measuring unit mobile to tested materials in the tube (9) simultaneously, when detecting the end face of tested materials in the tube (9) of this side, sends by the optoelectronic switch (6) of either side positioning detection mechanism signal, stopping this side positioning detection mechanism moves, after the both sides positioning detection mechanism all stops, record the displacement of both sides positioning detection mechanism, deduct both sides positioning detection mechanism displacement separately by the distance of two self-operated measuring units between zero point and just be the length of tested materials in the tube (9).

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