CN203786199U - Real-time corrosion current detector for corrosivity detection cell - Google Patents
Real-time corrosion current detector for corrosivity detection cell Download PDFInfo
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- CN203786199U CN203786199U CN201420157454.5U CN201420157454U CN203786199U CN 203786199 U CN203786199 U CN 203786199U CN 201420157454 U CN201420157454 U CN 201420157454U CN 203786199 U CN203786199 U CN 203786199U
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- amplifier
- chip microcomputer
- corrosion current
- control module
- range control
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Abstract
The utility model relates to a real-time corrosion current detector for a corrosivity detection cell. The real-time corrosion current detector comprises a lithium cell set, a 12864 liquid crystal display module, a pre-amplifier, a post-amplifier, an AD converter, a single-chip microcomputer, a range control module, a single-chip microcomputer and an SD card storage module. After corrosion current is amplified through the pre-amplifier, the signal after amplification is outputted through the post-amplifier to the AD converter and is converted into a digital signal, the digital signal is inputted into the single-chip microcomputer for processing, the single-chip microcomputer realizes output to the 12864 liquid crystal display module, the single-chip microcomputer is connected with an SD card through a serial port, the range control module realizes output to the pre-amplifier, and the lithium cell set is a power supply cell. The range control module automatically adjusts and monitors the current range, accurate detection and conversion display of the corrosion current are realized, a function of real-time corrosion current data storage is further added, and corrosion-degree detection automation of an air environment is realized industrially.
Description
Technical field
The utility model relates to a kind of feeble signal collection and detection technique, particularly a kind of corrosion current real-time detection apparatus of corrosivity monitoring cell.
Background technology
According to statistics, China is very huge due to the economic loss that corrosion causes every year, over several hundred billion yuan.Metal and atmospheric environment generation chemistry or electrochemical reaction and lost efficacy, not only make industrial plants and various product lose efficacy in advance, increase maintenance cost, and due to generation and the various secondary accident of corrosion product, as on November 22nd, 2013, the yellow oil pipeline crude oil leakage in incorporated company of China Petrochemical Industry east that is positioned at Qingdao, Shandong Province was blasted, and its immediate cause is to cause due to oil pipeline and discharge culvert intersection corrosive pipeline attenuate, pipeline breaking, 7.5 hundred million yuan of direct economic losses.As can be seen here, the real-time detection of research metal in the corrosive mediums such as gaseous environment has extremely important meaning to pre-anticorrosion.
Gas Corrosivity Sensors In Type of Multi-holed Planar Cell can convert electric current output to according to the corrosion power of gaseous environment, this electric current is called corrosion current, it can more accurately reflect that the corrosion of environment of living in is strong and weak, thereby therefore need to detect corrosion current size, further research environment corrosion is strong and weak.In practical application in industry, need long-time testing environment corrosion strong and weak, existing appliance requires people records corrosion current value for reading, and causes the waste of human resources, has improved cost.
Summary of the invention
The utility model is not high for detection technique automaticity, the problem that cost is high, a kind of corrosion current real-time detection apparatus of corrosivity monitoring cell has been proposed, adopt Analog Electronics Technique and serial port communication technology for the measurement of corrosion current, to design specially a kind of corrosion current real-time detection apparatus of corrosivity monitoring cell, convert the corrosion current of Gas Corrosivity Sensors In Type of Multi-holed Planar Cell output to digital signal and show and be saved in SD card, it has not only reduced testing cost and has also improved measurement efficiency.
The technical solution of the utility model is: a kind of corrosion current real-time detection apparatus of corrosivity monitoring cell, comprise lithium battery group, 12864 LCD MODULE, prime amplifier, post-amplifier, AD converter, single-chip microcomputer, range control module, single-chip microcomputer and SD card memory module, corrosion current exports A/D converter to through post-amplifier again through preposition prime amplifier amplified signal and converts digital signal to, digital signal is input to single-chip microcomputer and processes, single-chip microcomputer outputs to 12864 LCD MODULE and shows, single-chip microcomputer is linked and is connect by serial ports and SD, range control module outputs to prime amplifier, lithium battery group is supplying cell.
Described prime amplifier and post-amplifier are all selected amplifier ICL7650, range control module is selected CD4051 chip, COM end and the corrosion current of range control module chip CD4051 are input to prime amplifier amplifier ICL7650 input end through current-limiting resistance, preamplifier IC L7650 output terminal connects range control module chip CD4051 input/output port through feedback resistive network, and range control module chip CD4051 control input end connects single-chip microcomputer.
The beneficial effects of the utility model are: the corrosion current real-time detection apparatus of the utility model corrosivity monitoring cell, the corrosion current of Gas Corrosivity Sensors In Type of Multi-holed Planar Cell can not only be changed to demonstration exactly, and further increased the function of real-time preservation corrosion current data, realize industrial detection gaseous environment and corroded strong and weak robotization.
Accompanying drawing explanation
Fig. 1 is the corrosion current real-time detection apparatus inner structure schematic diagram of the utility model corrosivity monitoring cell;
Fig. 2 is the corrosion current real-time detection apparatus signal processing circuit figure of the utility model corrosivity monitoring cell.
Embodiment
The corrosion current real-time detection apparatus inner structure schematic diagram of corrosivity monitoring cell as shown in Figure 1, device comprises lithium battery group, 12864 LCD MODULE, prime amplifier, post-amplifier, AD converter, single-chip microcomputer, range control module, single-chip microcomputer and SD card memory module.
Described chargeable lithium cell group is connected with corrosion current testing circuit plate, gives whole device power supply.Described corrosion current testing circuit plate by electric battery the voltage of confession change into positive and negative 5V and 3.3V respectively to electronic component, SD card and 12864 module for power supply on circuit board, and realize corrosion current detection and with other various piece module communications.Described SD card module is by serial ports UART and single chip communication, and SD card module transmitting terminal is connected to single-chip microcomputer 35 pin URXD1, and receiving end is connected to single-chip microcomputer 34 pin UTXD1, in real time save data.Crust of the device is metal shell, plays the effect of anti-electromagnetic interference (EMI).
Prime amplifier is the preposition amplification of Low-bias Current, and post-amplifier is that high-speed, high precision rear class is amplified, and AD converter is 4 half analog to digital conversion.Corrosion current exports A/D converter to through post-amplifier again through prime amplifier amplified signal and converts digital signal to, again by single-chip microcomputer processes and displays and be saved in SD card memory module, range control module outputs to prime amplifier, realizes automatic range conversion.Chargeable lithium cell Zu Wei Sanyo 18650 lithium ion batteries form the lithium battery group of 5000mAH capacity.Described AD converter is ICL7135 modulus conversion chip, converts voltage signal to digital signal output; Described single-chip microcomputer is MSP430F169 single-chip microcomputer, and processing digital signal shows and preserve corrosion current data, and described SD card memory module is SDV600, realizes and preserves in real time corrosion current value.
Signal processing circuit figure as shown in Figure 2.Described prime amplifier amplifier ICL7650, is converted to current signal voltage signal and amplifies 10,000～1 thousands of times; Described post-amplifier is also selected amplifier ICL7650, the voltage signal that prime amplifier is amplified 10 times of anti-phase amplifications again; Described range control module is the module that electronic simulation chip CD4051 electronic analog swtich and feedback resistive network form, and realizes automatic range conversion.
By 0.2V voltage, produce corrosion current to Gas Corrosivity Sensors In Type of Multi-holed Planar Cell one end, the Gas Corrosivity Sensors In Type of Multi-holed Planar Cell other end is connected to signal input IN end, corrosion current is transferred to corrosion current test section and detects.This corrosion current enters preposition amplifier section ICL7650 amplifier the 4th pin by IN end, through preposition ICL7650 the 10th pin, export rear class amplifier section ICL7650 the 4th pin to, through anti-phase amplified signal, through rear class ICL7650 the 10th pin out end, export A/D converter ICL7135 to.Prime amplifier feedback capacity C12 used is poly-the third ethene electric capacity of 0.1uF, is connected respectively with IN end with 10 pin, and feedback resistive network resistance value is respectively 10k Ω, 100k Ω, 1M Ω, the resistance of 10M Ω size, is connected with CD4051 chip 12,15,14,13 respectively.R22 is input end current-limiting resistance, and size is 10k Ω.Post-amplifier feedback capacity C8 used is 22uF tantalum electric capacity, is connected respectively with rear class amplifier 4 pin with 10 pin.
Range control module is by the A of Single-chip Controlling CD4051, B, and C port is selected together with a road feedback resistance conducting wherein, the input end of range control module with prime amplifier input end be.CD4051COM mouth is public port, only has a road conducting during four road feedback resistive networks work, and when selecting a road conducting (as com port and 13 pin conductings), other are road disconnections.
The corrosion current real-time detection apparatus of a kind of corrosivity monitoring cell of the present utility model, by 5 power supplies of chargeable lithium cell group, output voltage is 9V～12.6V, this battery capacity 5Ah, the energy generator working time of 2～3 days, add SD card memory module, not only realized corrosion current and detected in real time, also realized the portable of corrosion current pick-up unit.
Claims (2)
1. the corrosion current real-time detection apparatus of a corrosivity monitoring cell, it is characterized in that, comprise lithium battery group, 12864 LCD MODULE, prime amplifier, post-amplifier, AD converter, single-chip microcomputer, range control module, single-chip microcomputer and SD card memory module, corrosion current exports A/D converter to through post-amplifier again through preposition prime amplifier amplified signal and converts digital signal to, digital signal is input to single-chip microcomputer and processes, single-chip microcomputer outputs to 12864 LCD MODULE and shows, single-chip microcomputer is linked and is connect by serial ports and SD, range control module outputs to prime amplifier, lithium battery group is supplying cell.
2. the corrosion current real-time detection apparatus of corrosivity monitoring cell according to claim 1, it is characterized in that, described prime amplifier and post-amplifier are all selected amplifier ICL7650, range control module is selected CD4051 chip, COM end and the corrosion current of range control module chip CD4051 are input to prime amplifier amplifier ICL7650 input end through current-limiting resistance, preamplifier IC L7650 output terminal connects range control module chip CD4051 input/output port through feedback resistive network, and range control module chip CD4051 control input end connects single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420157454.5U CN203786199U (en) | 2014-04-03 | 2014-04-03 | Real-time corrosion current detector for corrosivity detection cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420157454.5U CN203786199U (en) | 2014-04-03 | 2014-04-03 | Real-time corrosion current detector for corrosivity detection cell |
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| Publication Number | Publication Date |
|---|---|
| CN203786199U true CN203786199U (en) | 2014-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420157454.5U Expired - Fee Related CN203786199U (en) | 2014-04-03 | 2014-04-03 | Real-time corrosion current detector for corrosivity detection cell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102198A (en) * | 2017-06-26 | 2017-08-29 | 苏州大学 | Portable DC load current real- time recorder |
| CN109581040A (en) * | 2018-10-31 | 2019-04-05 | 湖北工业大学 | A kind of array corrosion current detection system and method for eliminating spatial noise |
-
2014
- 2014-04-03 CN CN201420157454.5U patent/CN203786199U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102198A (en) * | 2017-06-26 | 2017-08-29 | 苏州大学 | Portable DC load current real- time recorder |
| CN109581040A (en) * | 2018-10-31 | 2019-04-05 | 湖北工业大学 | A kind of array corrosion current detection system and method for eliminating spatial noise |
| CN109581040B (en) * | 2018-10-31 | 2020-12-18 | 湖北工业大学 | Array corrosion current detection system and method for eliminating spatial noise |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20150403 |
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| EXPY | Termination of patent right or utility model |