CN103969293A - Chimney inner wall corrosion detector - Google Patents
Chimney inner wall corrosion detector Download PDFInfo
- Publication number
- CN103969293A CN103969293A CN201410216154.4A CN201410216154A CN103969293A CN 103969293 A CN103969293 A CN 103969293A CN 201410216154 A CN201410216154 A CN 201410216154A CN 103969293 A CN103969293 A CN 103969293A
- Authority
- CN
- China
- Prior art keywords
- corrosion
- chimney
- signal
- electrode
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention belongs to the field of detection and particularly relates to a chimney inner wall corrosion detector. The chimney inner wall corrosion detector comprises corrosion detection lines, a fixed part, an electrode, a main control cabinet and an upper computer, wherein the two corrosion detection lines form one group; a plurality of groups are arranged in an array; the two detection lines of the same group are arranged in parallel; the fixed part is used for fixing the positions of the corrosion detection lines to keep the corrosion detection lines parallel and fixing the corrosion detection lines in a chimney liner; the four ends of the two corrosion detection lines are respectively connected with the four ends of two four-point type electrodes; the two connected ends of the other four ends of the electrodes are respectively connected onto an input signal line and a feedback signal line. The input signal line and the feedback signal line are respectively connected onto a signal source part and a signal processing and alarming part of the main control cabinet. According to the chimney inner wall corrosion detector, the corrosion detection lines arranged in a chimney can be used for sensing acid liquid to realize the detection of a corrosion condition; a detection process is automatic and safe and no people need to participate; the corrosion of the chimney can be found in time, so that the safe utilization of the chimney is guaranteed.
Description
Technical field
The invention belongs to detection field, particularly a kind of inner wall of stack corrosion detector.
Background technology
In enterprises such as thermal power plants, owing to using flue gas desulfurization technique to make the inner wall anti-corrosive of chimney become a large technical barrier.The gas of smoke stack emission comprises sulfuric acid, hydrochloric acid and magnesium thereof, sodium, calcium salt etc., when these sulfuric acid and salt with vapor form from passing through in chimney when, can be in inwall aggegation, because the pH value of this gas is in 2 left and right, it is acid corrosive liquids, thereby steel and cement etc. in chimney material can be destroyed with its reaction, greatly reduce serviceable life and the security of chimney.Therefore must carry out inner wall of stack anticorrosionly, ensure serviceable life of chimney, improve its security.
The chimney of industrial use is generally to form like this: concrete wall, heat-insulation layer, inwall and anticorrosive coat.Inwall comprises liner and inner core.In chimney use procedure, can be because the western number of thermal expansion of material be different with heating temperature and produce slippage separately between internal memory and concrete wall, thus produce gap, therefore generally can reserve expansion joint in both interface portion and alleviate this destruction.In being generally coated with dope on expansion joint, it is directly directly coated with in outer end, do not consider the flexible surplus of flexible glue, therefore become in large and anticorrosive coat will be torn at the width at expansion joint, cause corrosive liquid to enter liner or inner core damages chimney.In chimney inside, also can make anticorrosive coat cracking because temperature height changes in addition, chimney is corroded.
Therefore very urgent for the demand of the corrosion checkout equipment of inner wall of stack.
Summary of the invention
The object of the invention is to the corrosion test problems in order to solve inner wall of stack, extend serviceable life of chimney and improve security, a kind of practical, inner wall of stack corrosion detector that reliability is high is provided.
The object of the present invention is achieved like this:
Inner wall of stack corrosion detector, is made up of corrosion detection line, fixture, electrode, Main Control Tank and host computer, and two of detection lines of corrosion are one group, forms array more and places, two parallel placements of detection line on the same group; Fixture, for the position of fixed test corrosion line, makes it keeping parallelism, and is fixed on chimney lining; Four ends of two root-rot erosion detection lines are connected to four ends of two four-point electrodes, and the two ends that other four ends of electrode are connected are separately connected on input signal cable and feedback signal line.Input signal cable and feedback signal line are connected in the signal source part and signal processing and warning part of Main Control Tank, Main Control Tank comprises signal source part, signal is processed and warning part and 485 communications portion, the AC signal of signal source part output 36V, positive pole is connected by the common port of input signal cable and electrode, negative pole connects an input end of rectifier bridge in signal processing and warning part, signal is processed and the part of reporting to the police connects feedback signal line, the signal of feedback signal line is connected on the I/O mouth of MSP430 single-chip microcomputer after overcommutation and level conversion, MSP430 single-chip microcomputer is by judging whether corresponding I/O mouth is the corrosion condition that high level can obtain corresponding point, if corrosion detected, the corresponding position output of the part I/O mouth set of reporting to the police of MSP430 single-chip microcomputer, can realize the warning of corresponding position, MSP430 also will complete the corrosion condition data packing after scanning each time, and send to host computer by 485 communications portion.
3 millimeters of corrosion detection line diameters, material is stainless steel, appearance electroplating anticorrosion layer.
Fixture, for the position of fixed test corrosion line, makes it keeping parallelism, and is fixed on chimney lining, and material is nylon.
Electrode is four-point electrode, and material is copper, appearance electroplating anticorrosion layer.
Host computer runs on PC end, by resolving the packet from Main Control Tank, corrosion condition is presented on PC interface.
Beneficial effect of the present invention is:
The present invention can perceive acid solution by the corrosion detection line being arranged in chimney, realizes the detection of corrosion condition, and testing process automatic safe participates in without personnel, can find timely the corrosion of chimney, ensures the safe handling of chimney; Large area, array by corrosion detection line are installed, and can carry out comprehensively hot spot, accurately locate, for chimney patch work eases off the pressure; Can realize onsite alarming and Long-distance Control by timing scan and upper computer software simultaneously, pay close attention to the corrosion condition of chimney in industry spot and pulpit simultaneously, ensure to find in time, remedy in time, ensure that the long-term stability of chimney is used.
Brief description of the drawings
Fig. 1 is system chart of the present invention;
Fig. 2 is application schematic diagram of the present invention;
Fig. 3 is scheme of installation of the present invention;
Fig. 4 is corrosion detection line of the present invention and electrode connection layout;
Fig. 5 is Main Control Tank exterior panel schematic diagram of the present invention;
Fig. 6 is that signal in Main Control Tank of the present invention is processed and the partial graph of warning circuit.
Embodiment
Below in conjunction with accompanying drawing, this invention is described further.
The present invention is in order to solve the corrosion test problems of inner wall of stack, and improve security the serviceable life that extends chimney, and a kind of practical, inner wall of stack corrosion detector that reliability is high is provided.Whole system of the present invention is mainly made up of corrosion detection line, fixture, electrode, Main Control Tank and host computer.Wherein the corrosion detection line of two parallel placements is made the critical piece detecting, fix two root-rot erosion detection lines by fixture and make it keeping parallelism, and be fixed on chimney lining, four ends of two root-rot erosion detection lines are connected to four ends of two four-point electrodes, and the two ends that other four ends of electrode are connected are separately connected on input signal cable and feedback signal line.The signal source part of Main Control Tank is connected to one end of electrode by input signal cable, other one end of electrode is connected to by feedback signal line in the signal processing and warning part of Main Control Tank, through signal process and level conversion after input to MSP430 single-chip microcomputer, corrosion condition is carried out to scene and shows and pack and send to host computer by 485 communication modes.Often through one hour, electrode corrosion detection line is carried out to one-time detection, in the time that acid solution touches corrosion detection line, electrode can conducting, signal feedback to signal process and warning circuit on, realize onsite alarming and inform the information such as corrosion position of host computer chimney.
System of the present invention is made up of corrosion detection line, fixture, electrode, Main Control Tank and host computer:
1, corrosion detection line: whether corrode for detection of inner wall of stack position, 3 millimeters of diameters, material is stainless steel, appearance electroplating anticorrosion layer.
2, fixture: fix two root-rot erosion detection lines and make it keeping parallelism, and can be fixed on chimney lining, material is nylon.
3, electrode: be four-point electrode, material is copper, appearance electroplating anticorrosion layer.
4, Main Control Tank: Main Control Tank mainly comprises that signal source part, signal are processed and warning part and 485 communications portion, the AC signal of signal source part output 36V, positive pole is connected by the common port of input signal cable and electrode, and negative pole connects an input end of rectifier bridge in signal processing and warning part.Signal is processed and the part of reporting to the police connects feedback signal line, the signal of feedback signal line is connected on the I/O mouth of MSP430 single-chip microcomputer after overcommutation and level conversion, MSP430 single-chip microcomputer is by judging whether corresponding I/O mouth is the corrosion condition that high level can obtain corresponding point, if corrosion detected, the corresponding position output of the part I/O mouth set of reporting to the police of MSP430 single-chip microcomputer, can realize the warning of corresponding position, MSP430 also will complete the corrosion condition data packing after scanning each time, and sends to host computer by 485 communications portion.
5, host computer: host computer is the application program running on PC, reads the corrosion condition packet coming from Main Control Tank 485 communications portion transmission, and is presented on PC interface.
Technical scheme of the present invention is: be laid between anti-corrosion brick and chimney lining and around chimney one week parallel the corrosion detection line of two certain lengths, four ends of two root-rot erosion detection lines are connected to four ends of two four-point electrodes, and the two ends that other four ends of electrode are connected are separately connected on input signal cable and feedback signal line.Input signal cable and feedback signal line are connected in the signal source part and signal processing and warning part of Main Control Tank, Main Control Tank is every carries out one-time detection through a hour corrosion condition, in the time that acid solution touches corrosion detection line, feedback signal line is just connected with input signal cable, on feedback signal line, just there is the 36V AC signal of signal source output, after rectification by signal processing and level conversion, corresponding I/O mouth becomes high level, MSP430 single-chip microcomputer can be learnt the position of corrosion by judging the high level of I/O mouth, the set of the corresponding position output of the part of reporting to the police I/O mouth, can realize the warning of corresponding position, after having scanned at every turn, by the corrosion condition testing result packing when inferior, be transferred to host computer by 485 communications portion, host computer is receiving after the corrosion condition packet that Main Control Tank sends, by resolution data, corrosion condition is presented on PC interface, staff also can be known whether corrosion and concrete corrosion position are occurred by software interface.
In conjunction with Fig. 1, Fig. 1 is system chart of the present invention.Whole system of the present invention is mainly made up of corrosion detection line, fixture, electrode, Main Control Tank and host computer.Be laid between anti-corrosion brick and chimney lining and around chimney one week parallel the corrosion detection line of two certain lengths, four ends of two root-rot erosion detection lines are connected to four ends of two four-point electrodes, and the two ends that other four ends of electrode are connected are separately connected on input signal cable and feedback signal line.Input signal cable and feedback signal line are connected in the signal source part and signal processing and warning part of Main Control Tank, Main Control Tank is every carries out one-time detection through a hour corrosion condition, in the time that acid solution touches corrosion detection line, feedback signal line is just connected with input signal cable, on feedback signal line, just there is the 36V AC signal of signal source output, after rectification by signal processing and level conversion, corresponding I/O mouth becomes high level, MSP single-chip microcomputer can be learnt the position of corrosion by judging the high level of I/O mouth, the set of the corresponding position output of the part of reporting to the police I/O mouth, can realize the warning of corresponding position, after having scanned at every turn, by the corrosion condition testing result packing when inferior, be transferred to host computer by 485 communications portion, host computer is receiving after the corrosion condition packet that Main Control Tank sends, by resolution data, corrosion condition is presented on PC interface, staff also can be known whether corrosion and concrete corrosion position are occurred by software interface.
In conjunction with Fig. 2, Fig. 2 is application schematic diagram of the present invention.The present invention is applied to inner wall of stack corrosion condition and detects, as shown in FIG., at inner wall of stack, corrosion detection line is installed, and by signal input line and feedback signal line, the situation in chimney is fed back to Main Control Tank, Main Control Tank draws the corrosion condition of correspondence position by the signal on processing feedback signal line, and carry out onsite alarming and data packing is uploaded to host computer, host computer is presented at corrosion condition on PC interface by resolution data bag.
In conjunction with Fig. 3, Fig. 3 is scheme of installation of the present invention.In figure, 1 is antiseptic cement gum, and thickness is 3mm, and 2 is anti-corrosion brick, and 3 for routing layer runs through line, and 4 is wiring circular hole around, and 5 is perishable position, and 6 is detection position, 7 liners that are chimney.Corrosion detection line is mainly arranged on chimney lining (7) the inside, it is inwardly antiseptic cement gum (1), then be anti-corrosion brick (2), after after anti-corrosion brick (2) damages, antiseptic cement gum (1) is also corroded, acid solution can be penetrated into chimney lining (7) thereby inner electrode be connected and a switching signal of generation.
Install time of the present invention and need to circumferentially dig out corrosion detection line and lay at the inwall liner of chimney the groove of required specified width, which width: 30 millimeters of groove widths, dark 3 millimeters; The electrode place of laying also needs fluting to be used for the electrode of same angle position to be connected: 30 millimeters of groove widths, dark 20 millimeters.Be laid between anti-corrosion brick and chimney lining and around chimney one week parallel the corrosion detection line of two certain lengths, the termination of two root-rot erosion detection lines is connected with two point form electrode, one end of electrode is connected in signal generator circuit, the other end of electrode is connected in terminal box, in terminal box, there is signal generating circuit, and the ability of reception & disposal signal.Lay altogether 25 circles from chimney top to bottom, the length of every circle is the concrete girth in present position.10 meters, every circle interval.Every circle is placed 8 electrodes, 45 °, interval.Be connected with signal generating circuit in each one end, electrode place, all electrodes share a signal wire, and the other end is connected in terminal box, output signal line one line one use, isolation mutually, junction, electrode two ends, rubber seal.
In conjunction with Fig. 4, Fig. 4 is corrosion detection line of the present invention and electrode connection layout.In figure, illustrate two groups of individual detection position to corrode detection line and electrode, in each group, four ends of two root-rot erosion detection lines are connected to four ends of two four-point electrodes, and the two ends that other four ends of electrode are connected are separately connected on signal input line and feedback signal line.All groups by common port shared signal input line, and one group of one use of feedback signal line, owing to fixing the detection position of each group, so by judging that the group number of input signal can accurately locate the position being corroded, be convenient to carry out patch work.
In conjunction with Fig. 5, Fig. 5 is Main Control Tank exterior panel schematic diagram of the present invention.On panel directly over Main Control Tank as of the present invention in figure outside, having identified respectively from left to right the pilot lamp of fault 1 to fault 20 from top to bottom, is power switch pilot lamp in the lower left corner of panel, and the lower right corner is the button that carries out experiment test.The downside of casing is detection line interface, and panel top is uniformly distributed from left to right, from top to bottom successively detects interface 1 to detecting interface 20, is power input mouth in the lower left side of panel, and right side is 485 data transmission port.
In conjunction with Fig. 6, Fig. 6 is that signal in Main Control Tank of the present invention is processed and the partial graph of warning circuit.U1 is the DC-DC module WRF-4805S-1WR2 that the positive 48V of gold liter turns 5V, and U2 is AMS1117 voltage module, and U3 is dpdt relay, and U4 is triode 9013, and D1 is IN4007 voltage stabilizing diode, and D2 is red light emitting diodes, and C1, C2 are 0.1uF electric capacity.As shown in the figure, 5V DC voltage is connected with the negative pole of IN4007 (D1), is connected with 5 pin of dpdt relay (U3) simultaneously.The positive pole of IN4007 (D1) is connected with the collector of triode 9013 (U4), the base stage of triode 9013 (U4) is connected with MSP430 single-chip microcomputer warning output I/O mouth, and the emitter of triode 9013 (U4) is connected with power supply ground.Be connected the negative pole of red light emitting diodes (D2) and power supply, be anodally connected with 6 pins of dpdt relay (U3).Two ends and the loudspeaker of D2 are connected in parallel.
Electrode input two ends connect respectively 2 and 4 places of electric bridge, 1 end of electrode is connected with 2 pin with 1 pin of WRF-4805S-1WR2 (U1) respectively with 3 ends, 5 pin and 8 pin of WRF-4805S-1WR2 (U1) are unsettled, one end of 6 pin and C1 is connected, the other end of 7 pin and C1 is connected, and is connected to 1 pin of AMS1117 (U2) simultaneously.The connected one end that is simultaneously connected C2 in 3 pin of AMS1117 (U2) and one end of C1 is connected to power supply on the ground simultaneously, and the other end of C2 is connected with 2 pin of AMS1117 (U2), is connected to the signal input I/O mouth of MSP430 simultaneously.
In the time there is corrosion in certain position, in figure, between 2 of electric bridge and 4 ends, there is 36V alternating voltage, become DC voltage through rectifier bridge, become 5V DC voltage by U1 again, U2 converts the DC voltage of 5V to the high level signal of 3.3V, be input in MSP430 single-chip microcomputer, single-chip microcomputer learns after high level that this position corrodes collecting, by the warning output I/O set being connected with U4 base stage, 5 and 6 pins of U3 are interconnected, the DC voltage of 5V is carried in to the two ends of D2 and loudspeaker, realizes sound and light alarm.While MSP430 single-chip microcomputer is transferred to host computer by the packing of corrosion condition data by 485 communication modes and is presented on PC screen.
Claims (5)
1. an inner wall of stack corrosion detector, is made up of corrosion detection line, fixture, electrode, Main Control Tank and host computer, it is characterized in that: two of detection lines of corrosion are one group, forms array more and places, two parallel placements of detection line on the same group; Fixture, for the position of fixed test corrosion line, makes it keeping parallelism, and is fixed on chimney lining; Four ends of two root-rot erosion detection lines are connected to four ends of two four-point electrodes, and the two ends that other four ends of electrode are connected are separately connected on input signal cable and feedback signal line.Input signal cable and feedback signal line are connected in the signal source part and signal processing and warning part of Main Control Tank, Main Control Tank comprises signal source part, signal is processed and warning part and 485 communications portion, the AC signal of signal source part output 36V, positive pole is connected by the common port of input signal cable and electrode, negative pole connects an input end of rectifier bridge in signal processing and warning part, signal is processed and the part of reporting to the police connects feedback signal line, the signal of feedback signal line is connected on the I/O mouth of MSP430 single-chip microcomputer after overcommutation and level conversion, MSP430 single-chip microcomputer is by judging whether corresponding I/O mouth is the corrosion condition that high level can obtain corresponding point, if corrosion detected, the corresponding position output of the part I/O mouth set of reporting to the police of MSP430 single-chip microcomputer, can realize the warning of corresponding position, MSP430 also will complete the corrosion condition data packing after scanning each time, and send to host computer by 485 communications portion.
2. a kind of inner wall of stack corrosion detector according to claim 1, is characterized in that: 3 millimeters of described corrosion detection line diameters, material is stainless steel, appearance electroplating anticorrosion layer.
3. a kind of inner wall of stack corrosion detector according to claim 1 and 2, is characterized in that: fixture, for the position of fixed test corrosion line, makes it keeping parallelism, and is fixed on chimney lining, and material is nylon.
4. a kind of inner wall of stack corrosion detector according to claim 3, is characterized in that: electrode is four-point electrode, material is copper, appearance electroplating anticorrosion layer.
5. a kind of inner wall of stack corrosion detector according to claim 4, is characterized in that: host computer runs on PC end, by resolving the packet from Main Control Tank, corrosion condition is presented on PC interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410216154.4A CN103969293B (en) | 2014-05-21 | 2014-05-21 | A kind of inner wall of stack corrosion detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410216154.4A CN103969293B (en) | 2014-05-21 | 2014-05-21 | A kind of inner wall of stack corrosion detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103969293A true CN103969293A (en) | 2014-08-06 |
| CN103969293B CN103969293B (en) | 2016-05-04 |
Family
ID=51239051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410216154.4A Active CN103969293B (en) | 2014-05-21 | 2014-05-21 | A kind of inner wall of stack corrosion detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103969293B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6657423B2 (en) * | 2000-12-06 | 2003-12-02 | Denso Corporation | Physical quantity detection device with error detection in power supply line thereto |
| CN101517420A (en) * | 2006-07-12 | 2009-08-26 | 倍加福公司 | Corrosion measurement field device |
| JP2011095255A (en) * | 2009-10-30 | 2011-05-12 | Korea Electric Power Corp | Instrument and method for detecting corrosion of power transmission line |
| CN102279220A (en) * | 2011-03-11 | 2011-12-14 | 潘元志 | Method for manufacturing chip, gas sensor assembly and method for plating carbon nano tube on chip |
| CN103335323A (en) * | 2013-03-28 | 2013-10-02 | 北京恺岚一方科技发展有限公司 | Measuring method of corrosion degree of desulfuration flue gas to chimney |
| CN103472098A (en) * | 2013-04-16 | 2013-12-25 | 四川大学 | Method for measuring residual thickness of metal pipeline or metal pressure container after local corrosion |
-
2014
- 2014-05-21 CN CN201410216154.4A patent/CN103969293B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6657423B2 (en) * | 2000-12-06 | 2003-12-02 | Denso Corporation | Physical quantity detection device with error detection in power supply line thereto |
| CN101517420A (en) * | 2006-07-12 | 2009-08-26 | 倍加福公司 | Corrosion measurement field device |
| JP2011095255A (en) * | 2009-10-30 | 2011-05-12 | Korea Electric Power Corp | Instrument and method for detecting corrosion of power transmission line |
| CN102279220A (en) * | 2011-03-11 | 2011-12-14 | 潘元志 | Method for manufacturing chip, gas sensor assembly and method for plating carbon nano tube on chip |
| CN103335323A (en) * | 2013-03-28 | 2013-10-02 | 北京恺岚一方科技发展有限公司 | Measuring method of corrosion degree of desulfuration flue gas to chimney |
| CN103472098A (en) * | 2013-04-16 | 2013-12-25 | 四川大学 | Method for measuring residual thickness of metal pipeline or metal pressure container after local corrosion |
Non-Patent Citations (3)
| Title |
|---|
| 李冰 等: "火电厂铜合金凝汽器氯离子腐蚀及缓蚀剂研究综述", 《工业水处理》 * |
| 王喜辉: "火电厂烟囱钢内筒腐蚀检测技术", 《无损探伤》 * |
| 闫爱军 等: "湿法脱硫后烟气对钢烟囱的腐蚀试验研究", 《热力发电》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103969293B (en) | 2016-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102636306B (en) | Distributed strain collector for long-term safety monitoring of ship structure | |
| WO2018018650A1 (en) | System for controlling led lightbox power supply, and remote control method thereof | |
| CN203747750U (en) | Intelligent solar junction box | |
| JP2011210810A (en) | Smart grid power generation method and monitoring system therefor | |
| CN105716656A (en) | Urban comprehensive pipe gallery environment intelligent detection system device | |
| CN103969293B (en) | A kind of inner wall of stack corrosion detector | |
| CN209706849U (en) | Boiler combustion site intelligent monitoring for protection system | |
| CN210035092U (en) | Gas transmission pipeline detection device | |
| TWM561232U (en) | A device for power-grid management, a connector comprising thereof, and a power-grid comprising the same | |
| KR101022288B1 (en) | Apparatus for automatic greenhouse gas calculation using separated electric field sensor installation without power interruption | |
| KR101491518B1 (en) | Lighting Device | |
| CN205038354U (en) | Gamma -ray detection device for boiler system | |
| CN205383926U (en) | Heat exchanger stringing structure | |
| CN210571086U (en) | Cable temperature monitoring system in pipeline | |
| CN105305400A (en) | Reverse connection protection circuit of power supply of power utilization equipment | |
| CN206920083U (en) | A kind of extra-high-tension cable protective metal shell air tight test device | |
| CN209087096U (en) | Nonpolarity double bus residual current formula fire detector | |
| CN209260779U (en) | A kind of infiltration water monitoring system at pipe gallery interior conduit anticorrosive coating repaired mouth | |
| CN207782083U (en) | A kind of skyscraper multiple-limb M-Bus connections | |
| TWI661284B (en) | A connector comprising a device for power-grid management and a power-grid comprising the same | |
| CN102393510A (en) | Detection system for standing power supply | |
| CN207335990U (en) | The underground pipe gallery fault diagnosis testing apparatus safeguarded based on BIM | |
| CN2549508Y (en) | Synchronous balance monitor of lifting scaffold | |
| CN205407408U (en) | Intelligent substation inspection system | |
| CN104931813A (en) | Method and system for detecting states of machine room server LED lamps |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |