JPH10185699A - Method and device for measuring pipe welding temperature - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct the stabilized measurement by holding a wide angle lens at a fixed position opposite to a welding part, and connecting the lens to a detecting unit through an optical fiber, and leading the signal from the detecting unit to a temperature measurement control unit, and selecting the maximum temperature among a large quantity of data. SOLUTION: A wide angle lens 1 is held at a fixed position opposite to a welding position Ao of a raw material A to be welded, and the lens 1 is connected to an infrared ray radiation detecting unit 3 through an optical fiber 2, and the signal from the detecting unit 3 is led to a temperature measurement control unit 4. At this stage, temperature distribution of the material is displayed as a color monochromatic static image and letters. maximum temperature 1 point is selected among a large quantity of data of the control unit 4. An arm 5 is extended over the position Ao from a position for avoiding a welding machine so as to cross the pipe welding line, and fitted to an upper part of a fitting frame 6 by an adaptable through hole 5a and a screw 7 in the condition that fitting position thereof can be freely adjusted, and the frame 6 is provided with the detecting unit 3. The optical fiber 2 is extended from the detecting unit 3 along the arm 5 so as to come close to the position Ao .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a method and an apparatus for measuring pipe welding temperature.

[0002]

2. Description of the Related Art Since stainless steel pipes are particularly welded at high temperatures, they are generally measured using a two-color thermometer at present.

[0003]

However, when measuring the temperature of the welding point, control becomes impossible if the thermometer comes off the welding point due to vibration or rolling of the pipe. In addition, erroneous detection occurs due to welding spatter. SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and does not cause erroneous detection due to a point shift or erroneous detection due to spatter. Thus, a method and apparatus for measuring a pipe forming welding temperature capable of stably measuring a welding temperature and stabilizing the quality of a welded portion. The purpose is to provide.

[0004]

Means for Solving the Problems To solve the above problems, the configuration of the present invention is as follows. That is, in the method of the first configuration, in a pipe making welding line, a wide-angle lens is fixedly held to face a welding portion, and the wide-angle lens is connected to an infrared radiation detection unit via an optical fiber, and a signal from the detection unit is output. Is led to the temperature measurement control section, and one maximum temperature is selected from a large amount of data in the control section.

[0005] In the apparatus of the second configuration, a wide-angle lens is fixedly held opposite to a welding portion in a pipe-forming welding line, and the wide-angle lens is connected to an infrared radiation detecting section via an optical fiber. Is guided to the temperature measurement control section, and one maximum temperature point is selected from a large amount of data in the control section.

[0006]

Embodiments of the present invention will be described below based on one embodiment shown in the drawings. In pipe-welding line having forming rolls R shown in FIG. 1, a wide-angle lens 1 was placed held against the welding portion A ₀ of the welding material A, an infrared radiation detector via an optical fiber 2 from the wide-angle lens The signal from the detection unit is guided to the temperature measurement control unit 4. The control unit displays the temperature distribution of the object as a color or black and white still image and text. Then, one maximum temperature is selected from a large amount of data in the control section.

[0007] welder over the welding site A ₀ (not shown)
The arm 5 extends perpendicularly to the pipe-forming welding line from a position avoiding the above, and the arm 5 is attached to the upper part of the mounting frame 6 by a through hole 5a and a screw 7 so as to be adjustable in position. The detection unit 3 is installed on the frame 6. Then, the optical fiber 2 from the detection portion is guided along the arm 5, bent downwards in the vicinity of the tip, closer to the welding site A _0.

Here, as the detection unit 3 and the temperature measurement control unit 4, an infrared radiation thermometer / thermo tracer TH3100MR series manufactured by NEC Sanei Co., Ltd. (head office: 1-57, Tenjin-cho, Kodaira-shi, Tokyo) is used. . The outline of this is as follows. The thermo tracer TH3100MR series is a thermographic device that displays the temperature distribution of an object as a color or black and white still image and characters on a personal computer or a dedicated controller. And, TH3104MR of which is 3 to 5.3 to the detector.
HgCdTe infrared rays having a sensitivity wavelength range of μm are adopted, the number of scanning lines is 239 (PC) and 207 (control section), the frame time is 0.8 seconds / frame, and the focal length is 20 cm to ∞. The measurement temperature range is -10 to 2000C.

Then, the settings necessary for the measurement, such as focus (focus setting), level (center temperature setting), and sense (sensitivity setting), are automated, and simple operations are performed. Optical zoom enables 1-5 times zoom. Largely measured objects far away. The horizontal and vertical directions can be enlarged and displayed independently. A wide range of temperatures can be measured with high accuracy using 12-bit data. The temperature level and sense of the recorded data can be changed freely.

The control unit includes a battery as a power source, A
Compatible with C100V and car cigarette lighter sockets and can be used anywhere. In addition, it has a built-in easy-to-see high-resolution 5.7-inch LCD monitor and 3.5-inch floppy disk drive, and also has basic processing functions such as multi-point temperature display, image subtraction display, and ISO display. With the TH3100MR series, on-site measurement, recording, data processing and judgment can be easily and quickly performed.

The present invention is not limited to the embodiments and embodiments described above, but includes various modifications without departing from the spirit and scope of the appended claims.

[0012]

According to the configuration of the present invention, an accurate temperature can be stably measured, whereby the quality of the welded portion can be stabilized.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of the present invention.

[Explanation of symbols]

A Pipe to be welded A ₀ Welded part 1 Wide-angle lens 2 Optical fiber 3 Detector 4 Control unit 5 Arm 5a Through hole 6 Mounting frame 7 Screw

Claims (2)

[Claims] In a pipe making welding line, a wide-angle lens is fixedly held opposite to a welding portion, and the wide-angle lens is connected to an infrared radiation detecting section via an optical fiber, and a signal from the detecting section is used for temperature measurement control. A pipe forming welding temperature measuring method for selecting one maximum temperature from a large amount of data in the control section. 2. In a pipe-forming welding line, a wide-angle lens is fixedly held facing a welding portion, and the wide-angle lens is connected to an infrared radiation detecting section via an optical fiber, and a signal from the detecting section is used for temperature measurement control. A pipe welding temperature measuring device which is guided to a pipe section and selects one maximum temperature from a large amount of data in the control section.