JPH0811293B2 - measuring device - Google Patents

Description

The present invention relates to a measuring device used for analyzing the work efficiency of welding work, and more particularly to a measuring device capable of automatically measuring a welding arc generation time and a welding work time.

Conventionally, this type of device has not existed, and a stopwatch is used to analyze the work efficiency of welding work. That is, in the conventional work efficiency analysis of welding work, during the time from the start to the end of the welding work, the measurer uses the stopwatch on the worker's side to generate the welding arc, the time when the welding arc does not occur, etc. Is measured. For this reason, there are drawbacks in that it requires measurement personnel, there is a risk of human error in the measurement results, and arc fume and the like generated during welding work adversely affect the measurer.

The present invention improves on this point, and automatically determines the welding arc generation time (hereinafter referred to as “arc time”) and the time from the start to the end of welding work (hereinafter referred to as “cycle time”). It is an object to provide a measuring device capable of counting and displaying.

The present invention provides an arc sensor for detecting the occurrence of a welding arc, a reference clock generation circuit, a first counter for counting the reference clock during a welding operation period, and a first counter for displaying the contents of the first counter. One display circuit, a second counter that counts the reference clock only when the arc detection sensor output is present, and a second display circuit that displays the contents of the second counter. .

Further, the arc detection sensor is characterized by including at least a holding part of a welding electrode cable and a magnetic sensor part.

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an external view of an embodiment of the present invention. FIG. 1 is roughly divided into an arc detection sensor 1 and a measuring unit 2.
The arc detection sensor 1 is formed with an openable / closable holding portion 5 for holding the welding electrode cable 3. Further, on the surface of the measuring unit 2, a pilot lamp 6, a power switch 7, a start switch 8, an end switch 9, a reset switch 10,
An arc time display section 11 and a cycle time display section 12 are formed respectively.

FIG. 2 shows a block diagram of the essential parts of an embodiment of the present invention. That is, the output of the arc detection sensor 1 is connected to the AND circuit.
Connect to one input of 15. The output of the reference clock generation circuit 16 is connected to the other input of the AND circuit 15.

Here, the reference clock generation circuit 16 is configured to generate 60 reference clock pulses per minute. The output of this AND circuit 15 is connected to the counter 17, and this counter 17
Is connected to the drive circuit 18. Each display tube 19 is connected to the drive circuit 18. Also, the output of the reference clock generation circuit 16 is connected to the counter 21, and the output of this counter 21 is connected to the drive circuit 22. Each display tube 23 is connected to the drive circuit 22. The start switch 8 and the end switch 9 are connected to the reference clock generation circuit 16, and the reset switch 10 is connected to the reset terminals of the counters 17 and 21, respectively.

FIG. 3 shows a circuit diagram of a main part of the arc detection sensor 1. In FIG. 3, 25 is a magnetic sensor and 26 is an amplifier. C ₁ and C ₂ are smoothing capacitors, and Ro, R ₁ , R ₂ , R ₃ and R ₄ are resistors.

FIG. 4 shows a configuration diagram of the main parts of the arc detection sensor 1.
In FIG. 4, the same reference numerals as those in FIGS. 1 to 3 indicate the same parts. That is, a grip 27 for opening and closing the holding portion 5 is formed, and the circuit of FIG. 3 is formed on the substrate 28.

The characteristic operation of the embodiment of the present invention thus configured will be described. Welder (DC, AC) electrode cable 3 (+
The station or negative pole is held by the holding unit 5 of the arc detection sensor 1. In this state, turn on the power switch 7 of the measuring unit 2.
Then, the reset switch 10 resets the counters 17 and 21. Then, the start switch 8 is turned on. As a result, the reference clock generation circuit 16 generates a reference clock, and the counter 21 counts this clock. counter
The drive circuit 22 operates according to the count value of 21, and the cycle time is sequentially displayed on the display tube 23 as a number.

Now, when a welding arc is generated, the welding electrode cable 3
An electric current flows through the magnetic field and a magnetic field is generated by the electromagnetic induction effect. This magnetic field is detected by the magnetic sensor 25 of the arc detection sensor 1 and a sensor output voltage is generated. This sensor output voltage (about 40m
V) is amplified by the amplifier 26, and the amplified output (about 5V) is input to the AND circuit 15. The AND circuit 15 is opened only while the amplified output is being input, and the counter 18 is the reference clock generation circuit only during this period, that is, while the welding arc is generated.
Count the reference clock from 16. The drive circuit 18 operates corresponding to the count value of the counter 17, and the arc time is sequentially displayed on the display tube 19 as a numeral. The above operation is automatically performed during a predetermined welding process. The operator turns on the end switch 9 when the predetermined welding process is completed. As a result, the reference lock generation circuit 16 stops. At this time, the work analysis result of the predetermined welding process, that is, the arc time and the cycle time during the welding process are displayed on the arc time display unit 11 and the cycle time display unit 12, respectively.

As described above, according to the present invention, an arc detection sensor, a reference clock generation circuit for generating a reference clock,
Means for counting and displaying the reference clock during a predetermined welding process and means for counting and displaying the reference clock only when an arc detection sensor output is present.

Therefore, arc time and cycle time required for work efficiency analysis can be automatically counted and displayed. For this reason, it is possible to make the measurement result accurate without requiring a measurer as in the past. Further, it has an excellent effect that the operation is not complicated and the manufacturing cost can be reduced.

[Brief description of drawings]

 FIG. 1 is an external perspective view of an essential part of an embodiment of the present invention. FIG. 2 is a block diagram of the essential parts of one embodiment of the present invention. FIG. 3 is a circuit diagram of a main part of the arc detection sensor. FIG. 4 is an exploded perspective view of a main part of the arc detection sensor. 1 …… Arc sensor 11 …… Arc time display 12 …… Cycle time display 16 …… Reference clock generation circuit 17,21 …… Counter, 25 …… Magnetic sensor

Claims (1)

[Claims] 1. A holding part for holding an electrode cable of a welding machine, a magnetic field detecting part for detecting a magnetic field generated by a current flowing through the electrode cable taught by the holding part, and an output of the magnetic field detecting part converted into a voltage. A welding arc detector including a voltage converter, a reference clock generator that generates a clock signal, a first counting circuit that counts the clock signal, and the clock signal and the output of the welding arc elution unit. A circuit for taking a logical sum, a second counting circuit for counting the outputs of the circuit for taking a logical sum, and a display circuit for displaying the contents of the first and second counting circuits, Measuring device.