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Full electronic type multichannel constant current source and current adjustment method thereof

A constant current source, electronic technology, applied in the direction of adjusting electrical variables, control/regulation systems, converting AC power input to DC power output, etc., can solve problems such as cumbersome operation process and errors, improve work efficiency and facilitate operation , The effect of saving economic cost and time cost

Inactive Publication Date: 2017-10-17
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the new multi-channel precision DC constant current source device can provide constant current to multiple objects at the same time, it needs to manually adjust the knob to change the resistance to realize the change of current, and in the process of electrochemical corrosion, due to the corrosion of steel bars Make its resistance change, when the resistance of the steel bar changes, the overall resistance of the circuit composed of the constant current source steel bar will change, so the current may also change, so it is necessary to periodically adjust the fine-tuning knob of the constant current source to achieve the effect on reinforced concrete Provides a constant current, the device is not only cumbersome to operate, but also causes certain errors

Method used

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  • Full electronic type multichannel constant current source and current adjustment method thereof
  • Full electronic type multichannel constant current source and current adjustment method thereof
  • Full electronic type multichannel constant current source and current adjustment method thereof

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Effect test

Embodiment 1

[0048] In the multi-channel constant current source of this embodiment, each shunt branch of the shunt output module is also provided with a voltage detection unit respectively, and the voltage detection unit in each shunt branch respectively detects the voltage value of the shunt branch where it is located, and transmits it to the single-chip microcomputer ; The microcontroller transmits the received voltage detection value to the display module for display. It can make the user more clear about the specific parameters of the constant current source signal.

[0049] The power conversion module includes rectification circuits such as image 3 As shown, the rectifier circuit is a three-phase bridge-connected rectifier circuit connected in anti-parallel with the same phase. The rectifier device in the rectifier circuit is a thyristor. The same-phase and anti-parallel connection can effectively reduce electromagnetic interference and improve the flow sharing of rectifier device...

Embodiment 2

[0056] The controller, power conversion module, shunt output module and resistance adjustment drive unit are integrated in the same shell, and the shell is equipped with AC input interface, multiple constant current output interfaces, current setting value input interface and display output interface, AC input interface Connect the input end of the power conversion module, each constant current output interface provides a constant current for a test object, the current setting value input interface is used to connect the input module, and the display output interface is used to connect the display module. The input module and the display output interface can be realized by a computer, and the communication between the computer and the single-chip microcomputer is realized by a serial port, and the serial port is also arranged on the shell.

Embodiment 3

[0058] A current regulation method for an all-electronic multi-channel constant current source, including:

[0059] S1, obtain current detection value x, current setting value y and real-time resistance value R;

[0060] S2, set the current error threshold y 0 and the resistor increment value R 0 ;

[0061] S3, comparing the current detection value x with the current setting value y:

[0062] if y-x > y 0 , then control the resistance adjustment drive unit to adjust the adjustable resistance, so that the resistance value increases, and the changed resistance value of the variable resistance is R 1 =R+R 0 ;

[0063] If x-y>y0, then control the resistance adjustment drive unit to adjust the adjustable resistance, so that the resistance value is reduced, and the changed resistance value of the variable resistance is: R 1 =R-R 0 ;

[0064] if-y 0 ≤y-x≤y 0 , the resistance of the variable resistor does not need to be adjusted;

[0065] S4, obtain the current detection v...

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Abstract

The invention discloses a full electronic type multichannel constant current source and a current adjustment method thereof. The multichannel constant current source includes a power supply conversion module, a shunt output module, a controller, an input module, and a display module; the power conversion module converts an alternating current power supply into a direct current power supply; the shunt output module includes a plurality of parallel shunt branches, and an input end of each shunt branch is connected to an output end of the power supply conversion module; each shunt branch has a current detection unit, an adjustable resistor, and a resistor adjustment drive unit; the current detection unit in each shunt branch can detect a current value of the shunt branch and transmits the current value to a single chip microcomputer; the single chip microcomputer compares a current set value set by a user and a current detection value, the resistor adjustment drive unit adjusts the resistance of the adjustable resistor in each shunt branch, the changed current detection value is identical to or similar to the current set value. The full electronic type multichannel constant current source can supply a constant current source to a plurality of test objects at the same time, and can perform adjustment and real-time monitoring on the output constant current source.

Description

technical field [0001] The invention relates to a constant current source, in particular to an all-electronic multi-channel constant current source and a current regulating method thereof. Background technique [0002] Reinforced concrete refers to a composite material that improves the mechanical properties of concrete by adding steel mesh, steel plates or fibers to work together with it. Usually under general design, construction, and use conditions, the strength of steel bars in concrete structures can be fully utilized under good bonding, and the performance of components under the joint action of the two can be fully exerted. In reality, carbonization, steel corrosion, chemical corrosion, seawater erosion, stress damage, etc. will damage reinforced concrete, among which, chloride corrosion is the most serious damage factor. When the chloride ion in the concrete pore fluid around the steel bar reaches a critical concentration, the steel bar will corrode, which will caus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/46H02M7/162H02M7/155
CPCG05F1/46H02M7/1552H02M7/162H02M1/007
Inventor 杨欣冯辉魏佳欣侯利军迟善航王进刘泓
Owner HOHAI UNIV
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