Intelligent adjustable sacrificial anode and cathode protection device

A sacrificial anode and cathodic protection technology, which is applied in the field of intelligent adjustable sacrificial anode cathodic protection device, can solve the problems of lower work efficiency, accuracy impact, and many measurement points, so as to reduce management and operation costs, ensure stability, and performance reliable effect

Inactive Publication Date: 2011-11-09
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that there are many measurement points and heavy workload, whi

Method used

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  • Intelligent adjustable sacrificial anode and cathode protection device
  • Intelligent adjustable sacrificial anode and cathode protection device
  • Intelligent adjustable sacrificial anode and cathode protection device

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Such as figure 1 As shown, an intelligent adjustable sacrificial anode cathodic protection device, the device includes a single-chip microcomputer, signal processing unit, D / A conversion unit, IGBT power unit, battery management unit, keyboard unit, LCD display unit, sacrificial anode, buried pipeline , reference electrode, single chip microcomputer is respectively connected with signal processing unit, D / A conversion unit, battery management unit, LCD display unit, keyboard unit, IGBT power unit is respectively connected with D / A conversion unit, sacrificial anode, buried pipeline, signal The processing unit is connected to the reference electrode. The single-chip microcomputer is PIC16F873A, which is based on 8-bit high-performance 14-bit RISC instruction system, Harvard bus and two-level instruction stream structure single-chip microcomputer. PIC16F873A high-performance microcontroller includes 20 input / output programmable ports, 3 timers, 5-channel 10-bit A / D conve...

Embodiment 2

[0034] The single-chip microcomputer (CPU) enters the sleep state after being powered on and initialized.

[0035] 1. When any key is pressed, the LCD display unit will automatically light up to display the current actual protection potential. In this state, the minimum protection potential value can be set. Typically -0.85V (relative to saturated CU / CUSO4).

[0036] 2. Wait for 4 seconds to be awakened by the second pulse signal. After the RB5 port of the CPU supplies power to the signal processing unit, start the A / D converter channel 0 (RA0) to convert the actual potential signal into a 16-bit digital signal and store it in the CPU data register. The RB5 port of the CPU is powered off and enters the sleep state.

[0037] 3. After repeating step 2) 15 times (1 minute), the 15 times of data are averaged, and the error value e between the actual potential and the set minimum protection potential is calculated. The error value is proportionally amplified, integrated, and diff...

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PUM

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Abstract

The invention relates to an intelligent adjustable sacrificial anode and cathode protection device. The device comprises a singlechip, a signal processing unit, a digital/analog (D/A) conversion unit, an insulated gate bipolar transistor (IGBT) power unit, a keyboard unit, a sacrificial anode block, a buried pipeline and a reference electrode; the minimum protective potential value of the singlechip is set through the keyboard unit; the singlechip is awakened by pulse signals in every 4 seconds and used for controlling the signal processing unit to acquire the potential between the buried pipeline and the reference electrode, filtering the potential and storing the filtered potential into a data register of the singlechip; after N times of acquisition, the singlechip processes the acquired N data and outputs an increment value; the output increment value is used for controlling the impulse value of pulse width modulation (PWM); and the analog voltage generated after the impulse value is converted by the D/A conversion unit is output to the IGBT power unit, and the potential between the buried pipeline and the reference electrode is adjusted by controlling the IGBT power unit. Compared with the prior art, the device has the advantages of realizing long-term stability of the minimum protective potential of a protected body and the like.

Description

technical field [0001] The invention relates to a sacrificial anode cathodic protection device, in particular to an intelligent adjustable sacrificial anode cathodic protection device. Background technique [0002] Most of the existing buried or underwater pipelines (or steel structures) are equipped with cathodic protection systems, among which the sacrificial anode cathodic protection system is one of the widely used cathodic protection systems because it does not require external power supply and is easy to install. However, the current output of the anode is the largest at the initial stage of installation, and it decreases with time. In fact, it is necessary to add current to overcome the aging of the coating. On the other hand, when the current output is large due to the change of the environmental electrolyte, the anode is replaced frequently, resulting in high costs for installation and replacement. At present, the system is generally equipped with a certain number ...

Claims

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Application Information

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IPC IPC(8): C23F13/06
Inventor 王明衍
Owner SHANGHAI UNIV OF ENG SCI
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