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Conduction angle calibration circuit for precision welding current measurement instrument

A current measuring instrument and precision welding technology, which is applied in the field of calibration circuits, can solve problems such as inapplicability, and achieve the effects of compact structure, improved load capacity, and wide application range

Inactive Publication Date: 2016-04-20
WUXI METERING DETECTING TESTING CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the calibration of this special current measuring instrument, the existing technical regulations are not applicable, and a new calibration method needs to be studied

Method used

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  • Conduction angle calibration circuit for precision welding current measurement instrument
  • Conduction angle calibration circuit for precision welding current measurement instrument
  • Conduction angle calibration circuit for precision welding current measurement instrument

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0020] Such as figure 1 and image 3 As shown: in order to effectively calibrate the conduction angle measurement function of the precision welding current measuring instrument and realize accurate measurement of the precision welding current, the present invention includes a pulse width adjustment circuit with an adjustable pulse width on a fixed edge of the symmetrical axis and a pulse width adjustment circuit for improving A follower amplifier circuit with current pulse load capacity, the input end of the pulse width adjustment circuit is connected to the power supply, the output end of the pulse width adjustment circuit is connected to the input end of the follower amplifier circuit, and the output end of the follower amplifier circuit is connected to the current conversion circuit;

[0021] The pulse width adjustment circuit generates the current pulse wi...

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Abstract

The invention relates to a conduction angle calibration circuit for a precision welding current measurement instrument. The circuit comprises a pulse width adjustment circuit with the pulse width of the fixed edge of a symmetry axis to be adjustable, and a following amplifier circuit used for improving the current pulse load capacity. The input end of the pulse width adjustment circuit is connected with a power supply. The output end of the pulse width adjustment circuit is connected with the input end of the following amplifier circuit. The output end of the following amplifier circuit is connected with a current conversion circuit. A current pulse of a required conduction angle is generated by the pulse width adjustment circuit and then is input into the following amplifier circuit. The load capacity of the current pulse is improved by the following amplifier circuit. The following amplifier circuit outputs an amplified current pulse and the amplified current pulse is amplified and converted into a required precision welding current by the current conversion circuit. The circuit is compact in structure and can effectively calibrate the conduction angle measurement function of the precision welding current measurement instrument. Therefore, the precision welding current can be accurately measured. The circuit is wide in adaptive range, safe and reliable.

Description

technical field [0001] The invention relates to a calibration circuit, in particular to a conduction angle calibration circuit for a precision welding current measuring instrument, and belongs to the technical field of the precision welding current measuring instrument. Background technique [0002] The precision welding current measuring instrument is a transient large current measuring instrument, which can measure the peak value, effective value, energization angle, energization cycle number, etc. of the welding current. Precision welding is characterized by high requirements for current intensity control. The welding current is as high as several thousand amperes and the duration is only about 1000ms. The current will reach the extreme value within 10ms. In order to control the welding quality and improve the qualified rate of products, it is necessary to use a precision welding current measuring instrument to accurately measure the characteristics of the welding current...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
CPCG01R35/005
Inventor 章晓明
Owner WUXI METERING DETECTING TESTING CENT
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