CN101135669A - Program controlled converter for charging type intelligent magnetic powder flaw detector - Google Patents
Program controlled converter for charging type intelligent magnetic powder flaw detector Download PDFInfo
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- CN101135669A CN101135669A CNA2006101069601A CN200610106960A CN101135669A CN 101135669 A CN101135669 A CN 101135669A CN A2006101069601 A CNA2006101069601 A CN A2006101069601A CN 200610106960 A CN200610106960 A CN 200610106960A CN 101135669 A CN101135669 A CN 101135669A
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- inverter bridge
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Abstract
The invention comprises: a battery back, a power switch, a switch controlling circuit, a 5V voltage stabilizer; a micro processor; a MOS inversion bridge II, display, a trigger switch, a warner, a power adjustment circuit, and a charging port. Said battery pack and charging port are respectively connected to the power switch; said power switch is respectively connected to the switch controlling circuit and micro processor; the switch controlling circuit is also connected to the MOS inversion bridge II; the micro processor is respectively connected to the display, trigger switch, warner, indictor, power adjustment circuit, MOS inversion bridge II; the MOS inversion bridge II is connected to the output jack.
Description
Technical field
The present invention relates to a kind of magnaflux, especially relate to a kind of program controlled converter for charging type intelligent magnetic powder flaw detector.
Background technology
Current, the magnetic powder inspection method at home and abroad every field of industry has all obtained using widely, the ultimate principle that magnetic detects is: when ferrimagnet is magnetized in magnetic field, the defective or the structural state variation on material surface and nearly surface can make local magnetoconductivity change, that is magnetic resistance increases, thereby make corresponding distortion of magnetic flux in the magnetic circuit: a part of magnetic flux directly passes through defective, part magnetic flux is walked around defective at material internal, some magnetic flux can leave material surface, walk around defective by air and reenter material again, therefore formed stray field at material surface.In general, surface crack is dark more, and the amplitude that leakage flux runs off material surface is high more, and is linear basically between them.
At the stray field place, the material surface because the magnetic line of force is come in and gone out and form the two poles of the earth (S, the N utmost point) in the defective both sides, if when spraying tiny ferromagnetic powder on this surface, place, surface leakage magnetic field can adsorb magnetic and form the magnetic trace, demonstrate defect shape, this is the ultimate principle that magnetic detects.
At present, the domestic portable magnaflux of external industrial flaw detection that comprises mainly is made up of magnetic powder inspection probe (hereinafter to be referred as probe) and controller two parts, and popping one's head in is coil on the iron core in fact, according to the detected object difference, its structure is different with shape; The power supply of controller is supplied with all employing ~ 220V single-phase alternating current power supplies (no matter be rotating magnetic field defectoscope, yoke formula magnaflux, still the magnafluxs of combining of using) more, at first general ~ 220V single-phase alternating current is depressurized to 36V through transformer, gives the power supply of yoke formula probe; The rotating magnetic field probe needs the Alternating Current Power Supply of two groups of 36V, and 90 degree of the phase differential between these two groups of alternating currents, could form rotating magnetic field in workpiece through the rotating magnetic field probe.Have the yoke formula magnaflux of manufacturer production recent years, adopts rechargeable battery directly to power, generation be D.C. magnetic field, this product is owing to adopt direct current directly to power, skin effect is poor, detection sensitivity is low, uses less.
In real work, the especially on-the-spot magnetic that carries out detects, a lot of occasions, and for example: the inside of boilers and pressure vessel is detected, the online detection of pressure pipeline, and the power supply of single-phase AC～220V uses not only dangerous but also inconvenient.Secure context, the one,, the general dress of pressure vessel all be inflammable and explosive medium, have to leak in the cleaning dirty or checkout procedure and infiltrate, the power supply contact is bad, produces sparking, can cause burning or blast; The 2nd,, the material of making the pressure vessel employing generally is a conductive metallic material, if electric leakage occurs, can work the mischief to personal safety, so, in these occasions, the AC power of employing～220V is carried out magnetic and is detected, there is very big potential safety hazard,, can not ensures inspection personnel's safety just in case the electric leakage sparking takes place.On the other hand, the AC power of employing～220V is carried out magnetic at the scene and detected, and is very inconvenient, and especially, the magnetic of pressure pipeline weld seam detects, and the personnel that are engaged in the field test detection have an intimate knowledge.Not connect time of power supply long the time of Jian Ceing often, under the tight situation of check construction period, knows from experience more deep.When magnetic detect on-the-spot when being inconvenient to use the 220V civil power, for example: when pipeline, large pressurized vessel inside and work high above the ground, traditional portable magnetic powder inspection equipment just can not better meet requirements of one's work.
Summary of the invention
Purpose of the present invention just is to provide a kind of safe effect more easy to carry good program controlled converter for charging type intelligent magnetic powder flaw detector.
Purpose of the present invention can realize by following measure:
The present invention includes electric battery, power switch, control switching circuit, 5V voltage stabilizer, microprocessor, MOS inverter bridge II, output terminal, display, trigger switch, alarm, power conditioning circuitry, charging port; Wherein, electric battery and charging port are connected respectively to power switch, power switch is connected respectively to control switching circuit and microprocessor, control switching circuit is also connected to MOS inverter bridge II, microprocessor respectively with display, trigger switch, alarm, pilot lamp, power conditioning circuitry, MOS inverter bridge II, MOS inverter bridge II is connected to output socket.
Output socket is the single channel output socket among the present invention.Perhaps, output socket is the two-way output socket, simultaneously, also is connected with MOS inverter bridge 1 on the microprocessor, and MOS inverter bridge I and MOS inverter bridge II are connected to the two-way output socket jointly, and power switch is connected to MOS inverter bridge I.Perhaps, output socket is single channel output socket and a two-way output socket arranged side by side, simultaneously, also be connected with MOS inverter bridge I on the microprocessor, MOS inverter bridge I and MOS inverter bridge II are connected to the two-way output socket jointly, MOS inverter bridge II is also connected to the single channel output socket, and power switch is connected to MOS inverter bridge I.Electric battery comprises electric battery A and electric battery B.The microprocessor model is that P87C591 is certain, also can be other suitable models.Display is LCD or electroluminescence device.Alarm is a hummer etc.
The present invention is owing to adopt the foregoing circuit structure, and make it to have following advantage: the present invention is to use powered battery, is easy to carry, and is safer; Power consumption is little, and power is far smaller than the above power consumption of common magnaflux 400W about 50W; Corresponding different battery voltage values, the automatic power adjustment grade is supported the manual adjustments power grade simultaneously; Liquid crystal display two-way battery voltage value, working method and work gear; Buzzer warning and under-voltage pilot lamp indication under-voltage condition is arranged, the under-voltage hint image of liquid crystal display when battery is under-voltage.Through experimental verification, practical.Simultaneously, the present invention also has advantages such as safe and reliable.
The experimental data such as the following table of the present invention's continuous working under automatic mode:
Adopt the existing two joint 12V in laboratory, 12A*h accumulator, rotating magnetic field probe, A type normal sensibility 3# test piece (the meticulousst).
| Supply voltage (V) | Power grade | Electric current (A) | Flaw detection effect |
| 12.8 | 12 | 1.98 | Better |
| 11.7 | 11 | 2.04 | Better |
| 11.4 | 10 | 2.10 | Better |
| 11.1 | 9 | 2.16 | Better |
| 10.8 | 8 | 2.05 | Better |
| 10.5 | 7 | 2.18 | Better |
| 10.2 | 6 | 2.26 | Better |
| 9.8 | 5 | 2.45 | Better |
| 9.5 | 4 | 2.58 | Generally |
| 9.2 | 3 | 2.80 | Generally |
| 9.0 | 2 | 2.90 | Generally |
Annotate: 1. power grade is not represented the real power size, only represents the setting of internal running parameter.
2. flaw detection effect " better " is very clear for the magnetic trace shows, " generally " is that the magnetic trace is not obvious, can observe reluctantly.
Power remained at about 50W when data were worked as can be seen from last table, and is more stable.Through measuring, after being full of, accumulator starts working, and reducing to 11V to magnitude of voltage from 12.8V needs 4 hours, and 11V-9V can work 1 hour, and total stream time can reach more than 5 hours, can satisfy job requirement fully.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present invention;
Fig. 2 is circuit theory diagrams of the present invention;
Embodiment
The present invention does with detailed description below in conjunction with drawings and Examples:
Embodiment 1
As shown in the figure, the present invention includes electric battery, power switch, control switching circuit, 5V voltage stabilizer, microprocessor, MOS inverter bridge II, output terminal, display, trigger switch, alarm, power conditioning circuitry, charging port; Wherein, electric battery and charging port are connected respectively to power switch, power switch is connected respectively to control switching circuit and microprocessor, control switching circuit is also connected to MOS inverter bridge II, microprocessor respectively with display, trigger switch, alarm, pilot lamp, power conditioning circuitry, MOS inverter bridge II, MOS inverter bridge II is connected to output socket.
Embodiment 2
As shown in the figure, the present invention includes electric battery, power switch, control switching circuit, 5V voltage stabilizer, microprocessor, MOS inverter bridge II, output terminal, display, trigger switch, alarm, power conditioning circuitry, charging port; Wherein, electric battery and charging port are connected respectively to power switch, power switch is connected respectively to control switching circuit and microprocessor, control switching circuit is also connected to MOS inverter bridge II, microprocessor respectively with display, trigger switch, alarm, pilot lamp, power conditioning circuitry, MOS inverter bridge II, MOS inverter bridge II is connected to output socket.Output socket is the single channel output socket.
Embodiment 3
As shown in the figure, the present invention includes electric battery, power switch, control switching circuit, 5V voltage stabilizer, microprocessor, MOS inverter bridge II, output terminal, display, trigger switch, alarm, power conditioning circuitry, charging port; Wherein, electric battery and charging port are connected respectively to power switch, power switch is connected respectively to control switching circuit and microprocessor, control switching circuit is also connected to MOS inverter bridge II, microprocessor respectively with display, trigger switch, alarm, pilot lamp, power conditioning circuitry, MOS inverter bridge II, MOS inverter bridge II is connected to output socket.
Output socket is the two-way output socket, simultaneously, also is connected with MOS inverter bridge 1 on the microprocessor, and MOS inverter bridge I and MOS inverter bridge II are connected to the two-way output socket jointly, and power switch is connected to MOS inverter bridge I.
Embodiment 4
As shown in the figure, the utility model (invention) comprises electric battery, power switch, control switching circuit, 5V voltage stabilizer, microprocessor, MOS inverter bridge II, output terminal, display, trigger switch, alarm, power conditioning circuitry, charging port; Wherein, electric battery and charging port are connected respectively to power switch, power switch is connected respectively to control switching circuit and microprocessor, control switching circuit is also connected to MOS inverter bridge II, microprocessor respectively with display, trigger switch, alarm, pilot lamp, power conditioning circuitry, MOS inverter bridge II, MOS inverter bridge II is connected to output socket.
Output socket is single channel output socket and a two-way output socket arranged side by side, simultaneously, also be connected with MOS inverter bridge I on the microprocessor, MOS inverter bridge I and MOS inverter bridge II are connected to the two-way output socket jointly, MOS inverter bridge II is also connected to the single channel output socket, and power switch is connected to MOS inverter bridge I.
Embodiment 5
As shown in the figure, the present invention includes electric battery, power switch, control switching circuit, 5V voltage stabilizer, microprocessor, MOS inverter bridge II, output terminal, display, trigger switch, alarm, power conditioning circuitry, charging port; Wherein, electric battery and charging port are connected respectively to power switch, power switch is connected respectively to control switching circuit and microprocessor, control switching circuit is also connected to MOS inverter bridge II, microprocessor respectively with display, trigger switch, alarm, pilot lamp, power conditioning circuitry, MOS inverter bridge II, MOS inverter bridge II is connected to output socket.
Electric battery comprises electric battery A and electric battery B.The microprocessor model is P87C591, also can adopt other suitable models certainly.Display is LCD or electroluminescence device.Alarm is a hummer etc.
Embodiment 6
As shown in the figure, the present invention includes electric battery, power switch, control switching circuit, 5V voltage stabilizer, microprocessor, MOS inverter bridge II, output terminal, display, trigger switch, alarm, power conditioning circuitry, charging port; Wherein, electric battery and charging port are connected respectively to power switch, power switch is connected respectively to control switching circuit and microprocessor, control switching circuit is also connected to MOS inverter bridge II, microprocessor respectively with display, trigger switch, alarm, pilot lamp, power conditioning circuitry, MOS inverter bridge II, MOS inverter bridge II is connected to output socket.
Principle of work of the present invention is specific as follows:
The present invention adopts powered battery, by Single-chip Controlling MOS inverter bridge output square-wave voltage, gives the power supply of portable magnetic powder inspection probe.
According to magnetic circuit theorem: Φ=IN/Rm
I---coil current;
N---coil turn;
Rm---magnetic resistance;
After load was determined, magnetic resistance and coil turn were definite value, can draw following relation: Φ ∞ I
[1]
So because its magnitude of voltage is compared with the 220V civil power and is much smaller, expect good flaw detection effect during powered battery, must guarantee certain current value.Battery must cause that along with its output voltage values of increase of working time can constantly reduce electric current reduces, thereby causes that magnetic flux reduces, and finally causes slight crack
[2]That locates leakage flux reduces the deleterious of magnetic powder inspection.In order to guarantee the effect of magnetic powder inspection, after voltage reduces, guarantee that by certain method electric current does not reduce, can avoid the obvious decline of flaw detection effect.
According to this principle, this magnetic powder inspection device by gather battery voltage value in good time, is selected corresponding power grade, to guarantee good flaw detection effect in the course of the work automatically.
Major part and act on as follows among the present invention:
Single-chip microcomputer:
Adopt the P87C591 single-chip microcomputer of philips.
Single-chip microcomputer mainly finishing in circuit: querying triggering key; Gather the two-way battery voltage value, according to sampled value automatic setting power grade; Wherein 4 I/O mouths are given MOS inverter bridge provider wave control signal; The switching of control battery, pilot lamp and alarm buzzer; Functions such as control liquid crystal display.
The collection of cell voltage and application:
Select for use quick 8 A/D converters that the two-way cell voltage is sampled respectively, during two-way output, any one road battery is under-voltage then reports to the police; In single channel when output, switch to battery 1 power supply by relay when the battery 2 of acquiescence is under-voltage, report to the police when two batteries are all under-voltage.
Adjust power:
After device is started working, automatically select power grade, can regulate power grade when device by manual power grade adjusting key S1 and S2 when the power grade of setting can not be satisfied the demand in the course of the work automatically, S1 is whenever by next time, and power grade increases by 1 grade; Whenever by next time, power grade reduces a grade to S2.Manually the parameter that is provided with can remain to till the power-off.
Switching controls:
Switching controls is mainly used under the single channel output state, system default uses battery 2 during single channel output, when battery 2 is under-voltage, because this moment, battery 1 may also can use, so this moment, system did not carry out undervoltage warning, single-chip microcomputer output this moment control signal makes the relay adhesive, switches to battery 1 power supply state.
The MOS inverter bridge:
The MOS inverter bridge is the important component part of this program control contravariant magnetic powder inspection device, and its function is to realize exchanging and increasing output power with single supply.
Four output ports of P87C591 single-chip microcomputer are exported two prescription ripple signals, and same group two-way phase place is opposite.The phase phasic difference is 90 ° between two groups, can produce approximate rotating magnetic field when being operated in the two-way output state.MOS inverter bridge of each prescription ripple signal controlling makes MOS inverter bridge output square-wave voltage drive load.
With one road MOS inverter bridge wherein is example, and the base stage of N1 and N2 connects the output pin of single-chip microcomputer, and this two-way incoming level polarity is opposite.When the N1 base stage is high level, the N1 conducting, the Q0 conducting, Q1 ends; The N2 base stage is a low level, and N2 ends, the Q3 conducting, and Q2 ends.At this moment, constitute the loop between power supply A, Q0, load, Q3 and the ground.Otherwise, then Q1 and Q2 conducting, the electric current of the load of flowing through is anti-phase.
Wherein J7 is a voltage dependent resistor (VDR), can absorb the back electromotive force that inductive load produces in output terminal use in parallel.Play the effect of protection field effect transistor, and realize electromagnetic compatibility.
Output port:
Portable magnetic powder inspection probe kind is a lot, but roughly can be divided into two classes: single channel input (electromagnetic yoke probe) and dual input (rotating magnetic field probe) from its power supply form, at this situation, this device is provided with an output port: two-way output links to each other with the output terminal of two-way MOS inverter bridge; The single channel output port only with a road linking to each other wherein.Probe triggers key and inserts the single-chip microcomputer pin by port, and single and double line output can be selected according to trigger pip by system.During use, as long as the attaching plug of probe is linked to each other with output terminal.
Liquid crystal display:
Adopt LM3033B series LCD MODULE.
Show two-way battery voltage value, power grade and duty in the course of work.The display voltage value is with " cell voltage is low during undervoltage warning! "
Claims (8)
1. program controlled converter for charging type intelligent magnetic powder flaw detector, it is characterized in that: it comprises electric battery, power switch, control switching circuit, 5V voltage stabilizer, microprocessor, MOS inverter bridge II, output terminal, display, trigger switch, alarm, power conditioning circuitry, charging port; Wherein, electric battery and charging port are connected respectively to power switch, power switch is connected respectively to control switching circuit and microprocessor, control switching circuit is also connected to MOS inverter bridge II, microprocessor respectively with display, trigger switch, alarm, pilot lamp, power conditioning circuitry, MOS inverter bridge II, MOS inverter bridge II is connected to output socket.
2. program controlled converter for charging type intelligent magnetic powder flaw detector according to claim 1 is characterized in that: described output socket is the single channel output socket.
3. program controlled converter for charging type intelligent magnetic powder flaw detector according to claim 1, it is characterized in that: described output socket is the two-way output socket, simultaneously, also be connected with MOS inverter bridge 1 on the microprocessor, MOS inverter bridge I and MOS inverter bridge II are connected to the two-way output socket jointly, and power switch is connected to MOS inverter bridge I.
4. program controlled converter for charging type intelligent magnetic powder flaw detector according to claim 1, it is characterized in that: described output socket is single channel output socket and a two-way output socket arranged side by side, simultaneously, also be connected with MOS inverter bridge I on the microprocessor, MOS inverter bridge I and MOS inverter bridge II are connected to the two-way output socket jointly, MOS inverter bridge II is also connected to the single channel output socket, and power switch is connected to MOS inverter bridge I.
5. program controlled converter for charging type intelligent magnetic powder flaw detector according to claim 1 and 2 is characterized in that: described electric battery comprises electric battery A and electric battery B.
6. program controlled converter for charging type intelligent magnetic powder flaw detector according to claim 1 and 2 is characterized in that: described microprocessor model is P87C591
7. program controlled converter for charging type intelligent magnetic powder flaw detector according to claim 1 and 2 is characterized in that: described display is LCD or electroluminescence device.
8. program controlled converter for charging type intelligent magnetic powder flaw detector according to claim 1 and 2 is characterized in that: described alarm is a hummer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610106960A CN101135669B (en) | 2006-08-31 | 2006-08-31 | Program controlled converter for charging type intelligent magnetic powder flaw detector |
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| CN200610106960A CN101135669B (en) | 2006-08-31 | 2006-08-31 | Program controlled converter for charging type intelligent magnetic powder flaw detector |
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| CN101135669B CN101135669B (en) | 2010-05-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102930324A (en) * | 2012-11-30 | 2013-02-13 | 天津中环创新科技有限公司 | Active RFID (radio frequency identification) technical sensor tag |
| CN103178587A (en) * | 2013-04-17 | 2013-06-26 | 大唐洛阳首阳山发电有限责任公司 | Magnetizing power source for magnetic defect detector |
| CN116297818A (en) * | 2023-05-17 | 2023-06-23 | 中国核工业二四建设有限公司 | Nondestructive testing method for steel lining wallboard |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2116214U (en) * | 1992-04-13 | 1992-09-16 | 冶金部建筑研究总院 | Portable magnetic powder flaw detector |
| US6316845B1 (en) * | 1999-11-05 | 2001-11-13 | Parker Research Corporation | Battery powered AC electromagnetic yoke for magnetic particle inspection |
| CN100424504C (en) * | 2005-10-13 | 2008-10-08 | 曾德文 | Control method and device for magnetic powder inspection current |
| CN200950134Y (en) * | 2006-08-31 | 2007-09-19 | 黄新超 | Program controlled converter for charging type intelligent magnetic powder flaw detector |
-
2006
- 2006-08-31 CN CN200610106960A patent/CN101135669B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102930324A (en) * | 2012-11-30 | 2013-02-13 | 天津中环创新科技有限公司 | Active RFID (radio frequency identification) technical sensor tag |
| CN103178587A (en) * | 2013-04-17 | 2013-06-26 | 大唐洛阳首阳山发电有限责任公司 | Magnetizing power source for magnetic defect detector |
| CN116297818A (en) * | 2023-05-17 | 2023-06-23 | 中国核工业二四建设有限公司 | Nondestructive testing method for steel lining wallboard |
| CN116297818B (en) * | 2023-05-17 | 2023-08-04 | 中国核工业二四建设有限公司 | Nondestructive testing method for steel lining wallboard |
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