CN106442637A - Flange crack monitoring device and method - Google Patents
Flange crack monitoring device and method Download PDFInfo
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- CN106442637A CN106442637A CN201610696517.8A CN201610696517A CN106442637A CN 106442637 A CN106442637 A CN 106442637A CN 201610696517 A CN201610696517 A CN 201610696517A CN 106442637 A CN106442637 A CN 106442637A
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- crackle
- flange
- crack detection
- resistance
- detection piece
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
Abstract
The invention discloses a flange crack monitoring device and a flange crack monitoring method. The device includes at least one crack detecting slice, which is bonded at the flange measurement place, and linked mutually to form a crack detecting slice group; a data collecting device, which is electrically connected to the crack detecting slice group, so as to determine the crack state information according to the resistance change of the crack detecting slice group. By using the electric signal change caused by rupture of a resistor wire, the ruptured resistor wire is judged, so as to further determine the position, expansion direction, crack degree and other crack state information of the flange crack, and realize the purpose of rapidly finding out and determining the flange crack position and the crack direction of flanges on the condition that the large equipment applying the flanges keeps in the startup state, thus the large equipment is unnecessary to carry out the shutdown detection on the flange crack, and the flange maintenance is more effective and faster.
Description
Technical field
The present invention relates to flange monitoring field, particularly to a kind of flange crackle monitoring device and using this flange crackle
The flange crack monitoring method of monitoring device.
Background technology
Flange, and call orchid flange or bead.Flange is interconnective part between axle and axle, between pipe end
Connection；Also there is the flange imported and exported used in equipment, for the connection between two equipment, such as reductor flange etc..
Flange is the critical component connecting dynamical system and load structure in large scale structure, carry constantly acting load equipment,
The effect of transmission torque.
In large scale structure operation process, loading device is conducted oneself with dignity and the impact such as external environment condition, and flange will produce fatigue
Damage, damage to reach to a certain degree having crackle generation afterwards.If crackle finds not in time, crackle will progressively be deepened to lengthen,
Ultimately result in flange fracture, the serious safety threatening large scale structure.Therefore, flange crackle status monitoring is extremely important.
At present, there is no for flange crackle state on_line monitoring system, be all manually periodically large scale structure to be stopped mostly
During machine overhauling, ability checks to flange.
Content of the invention
In view of this, the present invention provides a kind of flange crackle monitoring device and method, with splitting of real time on-line monitoring flange
Stricture of vagina state, judges time of occurrence, degree, position and the direction of check of crackle, carry out equipment to safeguard in time.
The technical scheme is that and be achieved in that：
A kind of flange crackle monitoring device, including：
Crack detection piece, described crack detection piece is at least a piece of, and described crack detection piece is pasted on the measured place of flange,
Described at least a piece of crack detection piece is serially connected composition crack detection piece group；
Data acquisition unit, described data acquisition unit is electrically connected to described crack detection piece group, with according to described crackle
The resistance variations of detection lug group determine the crackle status information of described flange.
Further, every crackle detection lug all includes：
The different resistance wire of a plurality of resistance value, described resistance wire is parallel with one another；And,
Detection lug pin, described detection lug pin is two, is electrically connected in the two ends of a plurality of resistance wire in parallel；Its
In,
In described crack detection piece group, the resistance value of any two resistance wires is all unequal.
Further, each bar electricity when described crack detection piece is pasted on the measured place of flange, in described crack detection piece
Resistance silk is in straight configuration.
Further, described data acquisition unit includes：
Measuring circuit, described measuring circuit is electrically connected to described crack detection piece group, with according to described crack detection piece group
Resistance value generate voltage signal；
Data processing unit, described data processing unit is electrically connected to described measuring circuit, by described measuring circuit institute
The voltage signal generating is converted into crackle status information；And,
Power module, described power module is electrically connected to described measuring circuit data processing unit with to described measurement electricity
Road data processing unit is powered.
Further, described measuring circuit includes：
Bridge resistance, described bridge resistance is electrically connected to described crack detection piece group, and then described bridge resistance and described
Crack detection piece group collectively constitutes a crackle measurement bridge；
Excitation power supply, described excitation power supply is electrically connected to described crackle measurement bridge, to carry to described crackle measurement bridge
For encouraging the signal of telecommunication；
Amplifying circuit, described amplifying circuit is electrically connected to described crackle measurement bridge, to gather described crackle measurement bridge
Described in the voltage signal of crack detection piece group being amplified；
Filter circuit, the voltage letter that described filter circuit is electrically connected to described amplifying circuit to amplify described amplifying circuit
Number it is filtered processing；And,
A/D change-over circuit, described A/D change-over circuit is electrically connected to described filter circuit, with to through described filter circuit
Filtered voltage signal carries out A/D conversion, and the voltage signal after A/D is changed is sent to described data processing unit.
Further, described crackle measurement bridge is constant voltage source forcing；
Described excitation power supply is constant voltage source.
Further, described crackle measurement bridge is constant current source forcing；
Described excitation power supply is constant current source.
Further, described data acquisition unit also includes：
Wireless communication module, described wireless communication module is electrically connected to described data processing unit, by described crackle shape
State information is sent with wireless form, and receives wireless control signal and be transmitted to described data processing unit with to described
Data processing unit is configured；
Described power module is electrically connected to described wireless communication module with to described wireless communication module power supply.
A kind of flange crack monitoring method, using the as above flange crackle monitoring device described in any one, described flange splits
Stricture of vagina monitoring method includes：
Determine quantity and the crackle of the crack detection piece that crack detection piece group is adopted according to the size of tested ring flange
The quantity of resistance wire in detection lug；
Crack detection piece is pasted on tested ring flange successively according to direction clockwise or counter-clockwise；
According to the resistance of all resistance wires in crack detection piece group, set up resistance wire information arrangement table；
When carrying out flange crack monitoring, according to the resistance variations of described crack detection piece group, in described resistance wire information
The resistance wire of fracture is determined in permutation table；
According to the resistance wire present position of fracture, determine the crackle status information of described flange.
Further, the crackle status information of described flange includes：
Position, propagation direction, crackle degree and maintenance suggestion that described flange is cracked.
From such scheme as can be seen that the flange crackle monitoring device of the present invention and method, by the measured place in flange
It is pasted with multiple crack detection pieces that a plurality of resistance wire is constituted, and then the change of the signal of telecommunication being brought using the fracture of resistance wire is sentenced
Disconnected ruptured resistance wire, and then determine the crackle status informations such as position, propagation direction and the crackle degree of flange crackle, and then
Achieve that the main equipment of application flange is quick under not stopped status to find and determine flange crack position and direction of check
Purpose carries out shutdown detection so that the maintenance of flange is more efficient and quick so that main equipment is not necessarily referring to flange crackle.No
The employing of line communication module, so that flange crackle monitoring device departs from the puzzlement of line, during flange work operating, need not be examined
Consider line problem, also achieve simultaneously flange crackle status information real-time remote transmission it is achieved that monitoring and produce
Strange land is carried out.
Brief description
Fig. 1 is the composition schematic diagram of the flange crackle monitoring device of the embodiment of the present invention；
Fig. 2 is that in the embodiment of the present invention, crack detection piece is pasted on effect diagram during flange；
Fig. 3 is the composition schematic diagram of data acquisition unit in the embodiment of the present invention；
Fig. 4 is the composition schematic diagram of measuring circuit in the embodiment of the present invention；
Fig. 5 is the circuit theory diagrams of the crackle measurement bridge of constant voltage source forcing；
Fig. 6 is the circuit theory diagrams of the crackle measurement bridge of constant current source forcing；
Fig. 7 is the schematic flow sheet of the flange crack monitoring method of the embodiment of the present invention.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, develop simultaneously embodiment referring to the drawings,
The present invention is described in further detail.
As shown in figure 1, the flange crackle monitoring device of the embodiment of the present invention, gather dress including crack detection piece 1 data
Put 2.Wherein, described crack detection piece 1 is at least a piece of, and described crack detection piece 1 is pasted on the measured place of flange, described at least
A piece of crack detection piece 1 is serially connected composition crack detection piece group 10.Described data acquisition unit 2 is electrically connected to described crackle inspection
Survey piece group 10, to determine the crackle status information of described flange according to the resistance variations of described crack detection piece group 10.Wherein, institute
State the crack detection piece 1 that data acquisition unit 2 is electrically connected to two ends in described crack detection piece group 10.
With regard to the structure of crack detection piece 1, can refer to shown in Fig. 2, it is each that every crackle detection lug 1 all includes a plurality of resistance value
The resistance wire 101 differing and detection lug pin 102.Wherein, described resistance wire 101 is parallel with one another, described detection lug pin
102 are two, the such as first detection lug pin A and the second detection lug pin B, and (the first detection lug draws two detection lug pins 102
Foot A and the second detection lug pin B) it is electrically connected in the two ends of a plurality of resistance wire 101 in parallel, i.e. a plurality of resistance wire in parallel
101 one end is electrically connected to the first detection lug pin A, and the other end of a plurality of resistance wire 101 of parallel connection is electrically connected to
Two detection lug pin B.It is emphasized that in the embodiment of the present invention, in described crack detection piece group 10, any two resistance
The resistance value of silk 101 is all unequal.And then in each crack detection piece 1, after any one resistance wire 101 fracture, this crackle
The resistance of detection lug 1 is all different, for example, in some crack detection piece：After first resistance wire fracture, this crack detection piece
Resistance is the first resistance, and after second resistance wire fracture, the resistance of this crack detection piece is n-th resistance wire of the second resistance ...
After fracture, the resistance of this crack detection piece is the n-th resistance, then the first resistance, second resistance ... the n-th resistance are each unequal.Enter
One step, in the crack detection piece group 10 being formed after concatenation, the electricity of the post-rift crack detection piece group of any one resistance wire
Resistance is different from the resistance value of the post-rift crack detection piece group of other any one resistance wires.Sample is convenient to determine during monitoring
Which bar resistance wire fracture.
Fig. 2 illustrate only a piece of crack detection piece 1, and multi-disc crack detection piece 1 is attached using cascade.In addition,
As shown in Fig. 2 each bar resistance when described crack detection piece 1 is pasted on the measured place of flange 3, in described crack detection piece 1
Silk 101 is in straight configuration, so, when slight crack in flange 3 surface of resistance wire 101 present position, this resistance wire 101
To rupture, and to show that slight crack in flange 3 surface at this, otherwise cannot be carried out monitoring.
As shown in figure 3, in the embodiment of the present invention, described data acquisition unit 2 includes measuring circuit 201, data processing list
Unit 202 and power module 203.Wherein, described measuring circuit 201 is electrically connected to described crack detection piece group 10, with according to described
The resistance value of crack detection piece group 10 generates voltage signal.Described data processing unit 202 is electrically connected to described measuring circuit
201, the voltage signal that described measuring circuit 201 is generated is converted into crackle status information.Described power module 203 is electrically connected
It is connected to described measuring circuit 201 data processing unit 202 to power to described measuring circuit 201 data processing unit 202.
Described data acquisition unit 2 also includes wireless communication module 204, and described wireless communication module 204 is electrically connected at described data
Reason unit 202, described crackle status information is sent with wireless form, and receives wireless control signal and be transmitted to
Described data processing unit 202 is to be configured to described data processing unit 202.Described power module 203 is also electrically coupled to
Described wireless communication module 204 is to power to described wireless communication module 204.
As shown in figure 4, in the embodiment of the present invention, described measuring circuit 201 includes bridge resistance 2011, excitation power supply
2012nd, amplifying circuit 2013, filter circuit 2014 and A/D (analog/digital) change-over circuit 2015.Wherein, described bridge resistance
2011 are electrically connected to described crack detection piece group 10, and then described bridge resistance 2011 and 10 common groups of described crack detection piece group
Become a crackle measurement bridge.Described excitation power supply 2012 is electrically connected to described crackle measurement bridge, to measure bridge to described crackle
Road provides the excitation signal of telecommunication.Described amplifying circuit 2013 is electrically connected to described crackle measurement bridge, to gather described crackle measurement
The voltage signal of the group of crack detection piece described in bridge 10 is simultaneously amplified, and amplifying circuit 2013 is connected on bridge two ends.Described filter
The voltage signal that wave circuit 2014 is electrically connected to described amplifying circuit 2013 to amplify described amplifying circuit 2013 is filtered
Process.Described A/D change-over circuit 2015 is electrically connected to described filter circuit 2014, and described A/D change-over circuit 2015 is electrically connected
It is connected to described data processing unit 202, to carry out A/D conversion to through the filtered voltage signal of described filter circuit 2014,
And the voltage signal after changing A/D is sent to described data processing unit 202.
In the embodiment of the present invention, described crackle measurement bridge can encourage for constant pressure source, its principle assumption diagram such as Fig. 5 institute
Show.The crackle measurement bridge of this kind of constant voltage source forcing may include the first bridge resistance R1, the second bridge resistance R2, the 3rd bridge electricity
Resistance R3 and crack detection piece group resistance Rg.Wherein, one end of one end of the first bridge resistance R1 and the second bridge resistance R2 connects
It is connected to supply voltage VEXC, the other end of the first bridge resistance R1 and one end of the 3rd bridge resistance R3 are connected to node Sx-, the
One end of the other end of two bridge resistance R2 and crack detection piece group resistance Rg is connected to node Sx+, the 3rd bridge resistance R3's
The other end ground connection of the other end and crack detection piece group resistance Rg, constant voltage between supply voltage VEXC and ground connection.And amplifying circuit
2013 are connected to node Sx- and node Sx+, with the voltage between measuring node Sx- and node Sx+.When crack detection piece group 10
In the fracture of certain resistance wire after, crack detection piece group resistance Rg can change, and then between node Sx- and node Sx+
Voltage will change, thus can calculate by the new voltage between node Sx- and node Sx+ judging crack detection piece group
It is any bar resistance wire fracture in 10, and then understands that crackle in the flange position ruptured residing for resistance wire, and then can determine whether crackle
Propagation direction and crackle degree.
Described crackle measurement bridge can also be constant current source forcing, and its principle assumption diagram is as shown in Figure 6.This kind of constant-current source swashs
The crackle measurement bridge encouraged may include the first constant-current source DC1, the second constant-current source DC2, the 4th bridge resistance R4 and crack detection
Piece group resistance Rg.Wherein, the outfan of the first constant-current source DC1 and one end of the 4th bridge resistance R4 are connected to node A, and second is permanent
One end of the outfan of stream source DC2 and crack detection piece group resistance Rg is connected to node B, the other end of the 4th bridge resistance R4 and
The other end ground connection of crack detection piece group resistance Rg, the input of the input of the first constant-current source DC1 and the second constant-current source DC2 is even
Connecing between formation common input end, and the common input end of the first constant-current source DC1 and the second constant-current source DC2 and earth terminal is electricity
Source voltage vcc.Amplifying circuit 2013 is connected to node A and node B, with the voltage between measuring node A and node B.Work as crackle
After certain resistance wire fracture in detection lug group 10, crack detection piece group resistance Rg can change, and then node A and node B
Between voltage will change, thus can calculate by new voltage between node A and node B judging crack detection piece
It is any bar resistance wire fracture in group 10, and then understands that crackle in the flange position ruptured residing for resistance wire, and then can determine whether to split
The propagation direction of stricture of vagina and crackle degree.
Generally, when the resistance value of crack detection piece 1 is larger, powered using constant pressure source, i.e. described excitation power supply
2012 adopt constant voltage source；When the resistance value of crack detection piece 1 is less, can be using double constant current source power supplies, i.e. described excitation power supply
2012 adopt constant current source (double constant current source current).
When crackle in flange, the resistance wire of crack detection piece 1 will rupture one by one, and then crackle measures the resistance of bridge
Value changes, and the magnitude of voltage leading to amplifying circuit 2013 to be gathered is changed, and that is, the voltage signal of measuring circuit 201 is sent out
Changing, and then data processing unit 202 by the voltage signal acquisition of measuring circuit 201 and is converted into crackle status information and leads to
Cross wireless communication module 204 to send crackle status information.
In the embodiment of the present invention, wireless communication module 204 adopts 802.15.4 home control network communication protocol, supports point-to-point, star
The multiple network topological structures such as type, line style, tree-shaped.The crackle status information that data processing unit 202 is obtained, data acquisition fill
Put 2 numbering wirelessly to send, for example, send to Monitor Computer Control System.For meeting communication distance demand,
Wireless communication module 204 can join power transceiver module, to increase communication distance.Power transceiver module can be subdivided into power amplifier
And transmitting antenna.For increasing communication distance, can be solved by additional power amplifier, put including the radio-frequency power on sendaisle
Low-noise amplifier HFA3424 on big device HFA3925 and receiving channel.Radio-frequency power amplifier HFA3925 realizes 2.4GHz
Transmission signal power amplification function, gain amplifier maximum is up to 28dB (output maximum is up to 250mW).Low-noise amplifier
HFA3424 realizes 2.4GHz receipt signal low noise amplification function, and gain amplifier is up to 14dB.
In the embodiment of the present invention, data processing unit 202 Main Function is that the voltage exporting front end measuring circuit 201 is believed
Number it is converted into crackle status information, and the device numbering of setting data harvester 2, by 204 pieces of radio communication mold by crackle
Status information, device numbering send it is also possible to the instruction being issued according to main frame and parameter carry out starting collection, stop adopting
Collection, instantaneous collection, group number, channel setting, sample rate, port number setting, passage resets, electricity quantity inquiring.
In the embodiment of the present invention, can use what data processing unit 202 and wireless communication module 204 integrated and be
System chip CC2430 realizes data processing and transmission.This solution can improve performance and meet based on ZigBee
2.4GHz ISM band is applied to low cost, the requirement of low-power consumption.It combines a high-performance 2.4GHz DSSS (direct sequence
Spread spectrum) RF transceiver core and compact efficient 8051 controllers of technical grade.
For protocol stack, the requirement executing to MCU disposal ability of network and application software, CC2430 comprises an enhancing
8 8051 microcontroller core of type industrial standard.Due to faster execution time with by removing the total wire being wasted
The mode of state so that using standard 8051 instruction set CC2430 enhancement mode 8051 kernel, there is 8 times of standard 8051 kernel
Performance.
In the transmission mode, bit mapping and modulation are to be completed according to the specification of IEEE 802.15.4.Modulation (and expand
Frequently) completed by digital form.The baseband signal modulated is through D/A (digital-to-analog) transducer again by single side-band modulator
Carry out low-pass filtering and Direct conversion is changed into radiofrequency signal.Finally, high-frequency signal amplifies through piece internal strength rate amplifier to reach
To programmable level.
In the embodiment of the present invention, power module 203 is used for realizing the power supply to active device in device, simultaneously can also be right
Battery carries out management of charging and discharging.Power module 203 adopts independent power management to modules in device, makes when it is idle
It enters resting state or closes its power supply.So that total system power consumption substantially reduces.
In the embodiment of the present invention, digital signal processor can be connected with power module by IIC or UART interface, realize
Monitor in real time to the voltage of power pack, electric current and temperature conditionss, the generation preventing power supply from overcharging and owing electrical phenomena, notify net
Battery changed in time by network main frame.
The embodiment of the present invention additionally provides a kind of flange crack monitoring method, and this flange crack monitoring method adopts above-mentioned method
Blue crackle monitoring device.As shown in fig. 7, this flange crack monitoring method includes：
Step 1, determined according to the size of tested ring flange the quantity of the crack detection piece that crack detection piece group is adopted with
And in crack detection piece resistance wire quantity；
Step 2, crack detection piece is pasted on tested ring flange successively according to direction clockwise or counter-clockwise；
Step 3, the resistance according to all resistance wires in crack detection piece group, set up resistance wire information arrangement table；
Step 4, when carrying out flange crack monitoring, according to the resistance variations of described crack detection piece group, in described resistance
The resistance wire of fracture is determined in silk information arrangement table；
Step 5, the resistance wire present position according to fracture, determine the crackle status information of described flange.
Wherein, the crackle status information of described flange includes the position, propagation direction, crackle that described flange cracked
Degree and maintenance suggestion.
The following is an instantiation of the method.
First, the design of crack detection piece
First, the quantity of the crack detection piece altogether needing to paste, when detection lug designs, is calculated on a ring flange
M.
Afterwards, empirically, setting needs the crackle grade of monitoring, sets the resistance wire quantity in each crack detection piece
N.
2nd, the stickup of crack detection piece
When pasting crack detection piece on ring flange, the position of first labelling first piece crack detection piece, press afterwards clockwise
Or counterclockwise paste remaining each crackle detection lug successively.In the resistance wire of each crackle detection lug, longer is located at
Outside flange, shorter surveys in flange.All crack detection pieces are cascaded.
3rd, the foundation of resistance wire information arrangement table
With M=6 piece crackle detection lug, every crackle detection lug sets up resistance wire letter as a example having N=5 root resistance wire for this part
Breath permutation table, as shown in table 1.
Table 1：Resistance wire information arrangement table
| Crack gage 1 | Crack gage 2 | Crack gage 3 | Crack gage 4 | Crack gage 5 | Crack gage 6 | |
| Resistance wire 1 | R11 | R12 | R13 | R14 | R15 | R16 |
| Resistance wire 2 | R21 | R22 | R23 | R24 | R25 | R26 |
| Resistance wire 3 | R31 | R32 | R33 | R34 | R35 | R36 |
| Resistance wire 4 | R41 | R42 | R43 | R44 | R45 | R46 |
| Resistance wire 5 | R51 | R52 | R53 | R54 | R55 | R56 |
Rxy represents in table 1, in the whole piece crack detection piece link (i.e. crack detection piece group) of series connection, any one resistance
After silk fracture, in the resistance size of total measurement of output end.I.e. R11 represents in crack detection piece group, the of the first crack detection piece
Article one, after resistance wire fracture, in the resistance size of total measurement of output end, R12 represents in crack detection piece group, the second crack detection
After first resistance wire fracture of piece, in the resistance size of total measurement of output end, R21 represents that, in crack detection piece group, first splits
After the Article 2 resistance wire fracture of stricture of vagina detection lug, represent crack detection piece group in resistance size ... the R56 of total measurement of output end
Interior, after the Article 5 resistance wire fracture of the 6th crack detection piece, in the resistance size of total measurement of output end.
4th, the differentiation of crackle status information
If in table 1, the resistance of any Rxy is not mutually equal, and the resistance of any number of Rxy is added and is not mutually equal.
When the resistance that crackle monitoring device monitors is some resistance of the 1st row in table 1：
When the resistance that crackle monitoring device monitors is R11 resistance, crackle status information is：1 grade of crackle, crack detection
Piece is 1, and crackle is inwardly extended, slight crackle；
When the resistance that crackle monitoring device monitors is R12 resistance, crackle status information is：1 grade of crackle, crack detection
Piece is 2, and crackle is inwardly extended, slight crackle；
……
When the resistance that crackle monitoring device monitors is R16 resistance, crackle status information is：1 grade of crackle, crack detection
Piece is 6, and crackle is inwardly extended, slight crackle.
When the resistance that crackle monitoring device monitors is some resistance of the 5th row in table 1：
When the resistance that crackle monitoring device monitors is R51 resistance, crackle status information is：1 grade of crackle, crack detection
Piece is 1, crackle outward expansion, slight crackle；
When the resistance that crackle monitoring device monitors is R52 resistance, crackle status information is：1 grade of crackle, crack detection
Piece is 2, crackle outward expansion, slight crackle；
……
When the resistance that crackle monitoring device monitors is R56 resistance, crackle status information is：1 grade of crackle, crack detection
Piece is 6, crackle outward expansion.
If monitor is the 1st row resistance, and resistance wire 1 is to be pasted on outside flange, then crackle condition prompting letter
Breath is that crackle is inwardly extended；If monitor is the 5th row resistance, and resistance wire 5 is to be pasted on inside flange, then crackle shape
State information is crackle outward expansion.Because the crackle being monitored is located at outermost resistance wire, speculate that crackle exists
Just produce at flange periphery, cracked not serious, do not affect the operating of large scale structure, now with regard to crackle journey
Degree can only point out slight crackle.1 grade of crackle is represented by more slight crackle, does not now affect being continuing with of flange.
When it is in addition to an arbitrary resistance in the 1st row or the 5th row in table 1 that crackle monitoring device monitors resistance, then crackle
Status information is：2 grades of crackle, needs maintenance down at once.Because the crackle being monitored is located at the middle part of crack detection piece
Resistance wire, so speculating that crackle is formed in the middle part of flange because the crackle that formed of middle part can to inside and outside extension, and flange
Middle part stress is larger, thus judge crackle generated here impact larger, the problems such as quickly flange may occurring and rupture, general
The operating of large scale structure can be affected, therefore, now can only point out slight crackle with regard to crackle degree.2 grades of crackle is represented by
More serious crackle, crackle may expand at any time and affect being continuing with of flange, need shutdown inspection.
The flange crackle monitoring device of the present invention and method, are pasted with a plurality of resistance wire by the measured place in flange and constitute
Multiple crack detection pieces, and then the change of the signal of telecommunication being brought using the fracture of resistance wire judges ruptured resistance wire, enters
And determine the crackle status informations such as position, propagation direction and the crackle degree of flange crackle, and then achieve the big of application flange
Type equipment under not stopped status the quick purpose finding and determining flange crack position and direction of check so that main equipment not
Must carry out shutting down detection so that the maintenance of flange is more efficient and quick for flange crackle.The employing of wireless communication module, makes
Obtain the puzzlement that flange crackle monitoring device departs from line, during flange work operating, the problem of line need not be considered, simultaneously
Achieve the real-time remote transmission of flange crackle status information it is achieved that monitoring and the strange land producing are carried out.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement done etc., should be included within the scope of protection of the invention.
Claims (10)
1. a kind of flange crackle monitoring device is it is characterised in that include：
Crack detection piece, described crack detection piece is at least a piece of, and described crack detection piece is pasted on the measured place of flange, described
At least a piece of crack detection piece is serially connected composition crack detection piece group；
Data acquisition unit, described data acquisition unit is electrically connected to described crack detection piece group, with according to described crack detection
The resistance variations of piece group determine the crackle status information of described flange.
2. flange crackle monitoring device according to claim 1 is it is characterised in that every crackle detection lug all includes：
The different resistance wire of a plurality of resistance value, described resistance wire is parallel with one another；And,
Detection lug pin, described detection lug pin is two, is electrically connected in the two ends of a plurality of resistance wire in parallel；Wherein,
In described crack detection piece group, the resistance value of any two resistance wires is all unequal.
3. flange crackle monitoring device according to claim 2 it is characterised in that：
When described crack detection piece is pasted on the measured place of flange, each bar resistance wire in described crack detection piece is in and stretches
State.
4. flange crackle monitoring device according to claim 2 is it is characterised in that described data acquisition unit includes：
Measuring circuit, described measuring circuit is electrically connected to described crack detection piece group, with the electricity according to described crack detection piece group
Resistance generates voltage signal；
Data processing unit, described data processing unit is electrically connected to described measuring circuit, and described measuring circuit is generated
Voltage signal be converted into crackle status information；And,
Power module, described power module be electrically connected to described measuring circuit data processing unit with to described measuring circuit and
Data processing unit is powered.
5. flange crackle monitoring device according to claim 4 is it is characterised in that described measuring circuit includes：
Bridge resistance, described bridge resistance is electrically connected to described crack detection piece group, and then described bridge resistance and described crackle
Detection lug group collectively constitutes a crackle measurement bridge；
Excitation power supply, described excitation power supply is electrically connected to described crackle measurement bridge, is swashed with providing to described crackle measurement bridge
Encourage the signal of telecommunication；
Amplifying circuit, described amplifying circuit is electrically connected to described crackle measurement bridge, to gather institute in described crackle measurement bridge
State the voltage signal of crack detection piece group and be amplified；
Filter circuit, the voltage signal that described filter circuit is electrically connected to described amplifying circuit to amplify described amplifying circuit enters
Row Filtering Processing；And,
A/D change-over circuit, described A/D change-over circuit is electrically connected to described filter circuit, with to through the filtering of described filter circuit
Voltage signal afterwards carries out A/D conversion, and the voltage signal after A/D is changed is sent to described data processing unit.
6. flange crackle monitoring device according to claim 5 it is characterised in that：
Described crackle measurement bridge is constant voltage source forcing；
Described excitation power supply is constant voltage source.
7. flange crackle monitoring device according to claim 5 it is characterised in that：
Described crackle measurement bridge is constant current source forcing；
Described excitation power supply is constant current source.
8. flange crackle monitoring device according to claim 4 is it is characterised in that described data acquisition unit also includes：
Wireless communication module, described wireless communication module is electrically connected to described data processing unit, and described crackle state is believed
Breath is sent with wireless form, and receives wireless control signal and be transmitted to described data processing unit with to described data
Processing unit is configured；
Described power module is electrically connected to described wireless communication module with to described wireless communication module power supply.
9. a kind of flange crack monitoring method, using the flange crackle monitoring device as described in any one of claim 1 to 8, institute
State flange crack monitoring method to include：
Determine quantity and the crack detection of the crack detection piece that crack detection piece group is adopted according to the size of tested ring flange
The quantity of resistance wire in piece；
Crack detection piece is pasted on tested ring flange successively according to direction clockwise or counter-clockwise；
According to the resistance of all resistance wires in crack detection piece group, set up resistance wire information arrangement table；
When carrying out flange crack monitoring, according to the resistance variations of described crack detection piece group, in described resistance wire information arrangement
The resistance wire of fracture is determined in table；
According to the resistance wire present position of fracture, determine the crackle status information of described flange.
10. flange crack monitoring method according to claim 9 is it is characterised in that the crackle status information of described flange
Including：
Position, propagation direction, crackle degree and maintenance suggestion that described flange is cracked.
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