CN2434677Y - Metal magnetic memory diagnosis instrument - Google Patents
Metal magnetic memory diagnosis instrument Download PDFInfo
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- CN2434677Y CN2434677Y CN 00242001 CN00242001U CN2434677Y CN 2434677 Y CN2434677 Y CN 2434677Y CN 00242001 CN00242001 CN 00242001 CN 00242001 U CN00242001 U CN 00242001U CN 2434677 Y CN2434677 Y CN 2434677Y
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Abstract
The utility model discloses a metal magnetic memory diagnosis instrument. The utility model is composed of a magnetic induction sensor array, a temperature sensor, a distance measuring device, an amplifying filtering circuit, a multi-path switch, an A/D conversion module, a CPU system and a display device, wherein the sensor array is composed of one to dozens of Hall devices which are in the same type and the Hall devices are connected and input in parallel and are connected and output in series. The utility model is mainly used for determining the positions where defects or stress concentration exists in a ferromagnetic component. The metal magnetic memory diagnosis instrument of the utility model is provided with a plurality of real-time detecting passages. The utility model does not need to specially magnetize a detected object or conduct any pretreatment for the detected surface, the detection speed is high and the utility model can display visually the positions of the defects and the stress concentration of the component.
Description
The utility model relates to a kind of metal detection diagnostic instrments.
At present, industry just towards " three height " (be high temperature, at a high speed, high carrying) direction develops.Equipment, member often just have not been damaged to the next conventional sense cycle under " three height " running status and have caused accident, cause serious consequence.Tradition lossless detection method (as ultrasonic, magnetic, infiltration, eddy current, ray etc.) has been widely used in industrial non-destructive and has detected, but because the limitation of principle and technology, traditional NDT method only can detect the defective that has developed shaping.For the recessive discontinuous variation of the earlier damage, the especially metal that detect metal reliably, delicately, to satisfy the needs of modern industry Non-Destructive Testing, must explore new theory, the exploitation new instrument.
The purpose of this utility model is to overcome the prior art deficiency, provides a kind of and can detect metal earlier damage, recessive discontinuous variation, and the novel diagnostic equipment of intuitive display.
The purpose of this utility model is achieved in that 1997 in the 50th the international welding academic conference that san francisco, usa is held, Russian scientist proposes metal stresses concentration zones--metal micro-variations--the magnetic memory effect theory of being correlated with, and forming a cover, brand-new the metal diagnostic techniques--metal magnetic memory (MMM) technology, this theory obtains admitting of international community immediately.The detection method that this is described as 21st century NDT new technology is the brand-new detection technique that integrates conventional Non-Destructive Testing, fracturing mechanics, the many potential functions of metallography.
Experimental studies have found that: Distribution of Magnetic Field on the ferromagnetic metal parts surface and component stress load have certain relation, therefore can diagnose parts indirectly by the Distribution of Magnetic Field situation on detection part surface.The tangential component Hp in ferromagnetic component defective or region of stress concentration magnetic field (x) has maximal value, normal component Hp (y) reindexing and have null value.Based on above-mentioned principle, the applicant intends by it the position that component defect or stress are concentrated being determined in the detection of ferromagnetic component Surface field normal component Hp (y) that its technical solution is:
Metal magnetic memory diagnostic instrument is made up of magnetic induction sensor array, temperature sensor, distance-measuring device, amplification filtering circuit, multi-way switch, A/D modular converter, cpu system, display device etc.The output terminal of temperature sensor connects multi-way switch through connecing amplifier; Distance-measuring device directly connects computer system; The magnetic induction sensor array connects multi-way switch through the amplification filtering circuit; The input end of the output termination A/D modular converter of multi-way switch, the input end of the output termination cpu system of A/D modular converter, display connects the output terminal of cpu system.
Distance-measuring device described in the utility model is made up of reversible photoelectric encoder, probe guide wheel and corresponding circuit.
Magnetic induction sensor array described in the utility model can be by an input in parallel of the hall device to tens same models, and series connection output is formed.
Magnetic induction sensor described in the utility model, temperature sensor, distance-measuring device are assembled into detection probe.
Because the utility model is taked said structure, metal magnetic memory diagnostic instrument has a plurality of real-time sense channels.It does not need detected object is magnetized specially; do not need measured surface is done any pre-service; detection speed is fast, the parts of surperficial matcoveredn is allowed to lift to 150mm detect, and originally ignorant stress is concentrated or defective locations can be determined in testing process.Instrument adopts man-machine conversation, menu prompt, hot key to help, and has the Chinese and English software version, and is easy and simple to handle, and instrument also has record, storage, copy and analytic function.The instrument machine volume is little, in light weight, the alternating current-direct current dual-purpose.Instrument also is furnished with string, parallel port, convenient with extraneous communication.In addition, instrument also is furnished with data analysis management software, can do further to analyze and handle on any PC to the data of collection in worksite.
Reaching embodiment in conjunction with the accompanying drawings is further described the utility model:
Accompanying drawing 1, be the utility model theory structure block diagram;
Accompanying drawing 2, be the utility model distance-measuring device structural representation;
Accompanying drawing 3, be the utility model detection probe structural representation;
Accompanying drawing 4, be the utility model amplification filtering circuit diagram;
Accompanying drawing 5, be the utility model embodiment 1 hall device connected mode synoptic diagram;
Accompanying drawing 6, be the utility model embodiment 2 hall device connected mode synoptic diagram;
Shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, the utility model is made up of magnetic induction sensor array (2), temperature sensor (1), distance-measuring device (3), amplification filtering circuit (5), multi-way switch (6), A/D modular converter (7), cpu system (8), display device (9) etc.The output terminal of temperature sensor (1) connects multi-way switch (6) through connecing amplifier (4); Distance-measuring device (3) directly connects cpu system (8); Magnetic induction sensor array (2) connects multi-way switch (6) through amplification filtering circuit (5); The input end of the output termination A/D modular converter (7) of multi-way switch (6), the input end of the output termination cpu system (8) of A/D modular converter (7), display (9) connects the output terminal of cpu system (8).
Distance-measuring device is made up of reversible photoelectric encoder (13), probe guide wheel (11), driving-belt (12), control circuit (14).Its principle of work is: probe guide wheel (11) rotates and makes reversible photoelectric encoder (13) produce pulse signal, because the girth C of probe guide wheel (11) fixes, and reversible photoelectric encoder (13) turns around and produces pulse number N and also fix, according to measured pulse number M, just can learn detection stroke S=M/N*C by computed in software.This device is used for finishing the transmission of sensor at product surface relative position information.
Magnetic induction sensor (2) array is the key element of this instrument, is made up of a hall device H to tens same models, and these hall devices H has characteristics such as highly sensitive, good linearity.Can select array size, the i.e. number of hall device H according to the concrete condition of on-the-spot detected object.It is mainly used to measure the magnetic field intensity of checked object.
Magnetic induction sensor (2), temperature sensor (1), distance-measuring device (3) are assembled into detection probe.Temperature sensor (thermistor) (1) and amplifying circuit (4) are formed temperature-compensation circuit.Because magnetic induction sensor (2) is comparatively responsive to temperature, and compensating circuit need be set.Temperature sensor (1) and magnetic induction sensor (2) are contained on the same probe, this temperature information that has just guaranteed that temperature sensor (1) experiences is consistent with the residing temperature environment of magnetic induction sensor (2), and the influence that makes instrument floated by temperature reduces greatly.
As shown in Figure 4, be the amplification filtering circuit, this instrument has eight passages among the embodiment, and now getting one of them passage is example, and rest channels is similar.Two output terminals of hall device H1 connect the input end of amplifier A11 respectively through resistance R 11, resistance R 21; The second-order low-pass filter that the output termination of amplifier A11 is made up of resistance R 51, capacitor C 11, resistance R 61, capacitor C 21, resistance R 71, resistance R 81 and amplifier A21.The signal that hall device H1 produces, by resistance R 11, resistance R 21 send into amplifier A11 amplify R31/R11 doubly after, again through the filtered signal of second-order low-pass filter by entering A/D converter (7) by control signal gating multi-way switch (6), be connected with main frame (8) by I/O interface and bus through the data after the conversion, by software it is handled, the result send display device (9).
The magnetic induction sensor array is by hall device H1 ... Hn (n 〉=1) forms, and can select array size according to actual conditions.When the magnetic field intensity of detected object is stronger, passage only needs a hall device, and therefore eight passages detect simultaneously if desired, just need form the magnetic induction sensor array by eight hall devices; And when the magnetic field intensity of detected object a little less than, the sensitivity that just needs to improve hall device.Embodiment 1, as shown in Figure 5, the utility model adopt 2 hall devices to form 1 passage, and two Hall element H11, H12 adopt the sensitivity that input is in parallel, the mode of output series connection improves hall device.
Claims (4)
1, a kind of metal magnetic memory diagnostic instrument, it is characterized in that: be made up of magnetic induction sensor array, temperature sensor, distance-measuring device, amplification filtering circuit, multi-way switch, A/D modular converter, cpu system, display device, the output terminal of temperature sensor connects multi-way switch through connecing amplifier; Distance-measuring device directly connects computer system; The magnetic induction sensor array connects multi-way switch through the amplification filtering circuit; The input end of the output termination A/D modular converter of multi-way switch, the input end of the output termination cpu system of A/D modular converter, display connects the output terminal of cpu system.
2, according to the described metal magnetic memory diagnostic instrument of claim 1, it is characterized in that: described distance-measuring device is made up of reversible photoelectric encoder, probe guide wheel and corresponding circuit.
3, metal magnetic memory diagnostic instrument according to claim 1 is characterized in that: described sensor array can be by an input in parallel of the hall device to tens same models, and series connection output is formed.
4, metal magnetic memory diagnostic instrument according to claim 1 is characterized in that: described magnetic induction sensor, temperature sensor, distance-measuring device are assembled into detection probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00242001 CN2434677Y (en) | 2000-06-30 | 2000-06-30 | Metal magnetic memory diagnosis instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00242001 CN2434677Y (en) | 2000-06-30 | 2000-06-30 | Metal magnetic memory diagnosis instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2434677Y true CN2434677Y (en) | 2001-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00242001 Expired - Lifetime CN2434677Y (en) | 2000-06-30 | 2000-06-30 | Metal magnetic memory diagnosis instrument |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100414292C (en) * | 2005-10-10 | 2008-08-27 | 中国石油天然气集团公司 | Metal magnetic memory detecting method of ferromagnetic material crack |
| CN101995432A (en) * | 2010-11-04 | 2011-03-30 | 重庆大学 | Hall element differential array based ferromagnetic construction member surface crack detector |
| CN101261245B (en) * | 2008-04-18 | 2011-06-29 | 中南林业科技大学 | Defective rheid pyromagnetic collection and test system |
| CN102590327A (en) * | 2012-01-16 | 2012-07-18 | 南昌航空大学 | Multi-channel magnetic flaw detector |
| CN102879457A (en) * | 2012-07-20 | 2013-01-16 | 北京工业大学 | Three-dimensional metal magnetic memory testing instrument and method |
| CN102879458A (en) * | 2012-08-07 | 2013-01-16 | 包胜 | Damage detector based on piezomagnetic effect |
| CN103235031A (en) * | 2013-04-16 | 2013-08-07 | 中南林业科技大学 | Five-point position three-dimensional magnetic field measurement method based on plate stretching pyromagetic effect |
-
2000
- 2000-06-30 CN CN 00242001 patent/CN2434677Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100414292C (en) * | 2005-10-10 | 2008-08-27 | 中国石油天然气集团公司 | Metal magnetic memory detecting method of ferromagnetic material crack |
| CN101261245B (en) * | 2008-04-18 | 2011-06-29 | 中南林业科技大学 | Defective rheid pyromagnetic collection and test system |
| CN101995432A (en) * | 2010-11-04 | 2011-03-30 | 重庆大学 | Hall element differential array based ferromagnetic construction member surface crack detector |
| CN102590327A (en) * | 2012-01-16 | 2012-07-18 | 南昌航空大学 | Multi-channel magnetic flaw detector |
| CN102879457A (en) * | 2012-07-20 | 2013-01-16 | 北京工业大学 | Three-dimensional metal magnetic memory testing instrument and method |
| CN102879457B (en) * | 2012-07-20 | 2016-05-18 | 北京工业大学 | 3-dimensional metal magnetic memory detector device and detection method |
| CN102879458A (en) * | 2012-08-07 | 2013-01-16 | 包胜 | Damage detector based on piezomagnetic effect |
| CN102879458B (en) * | 2012-08-07 | 2014-12-31 | 包胜 | Damage detector based on piezomagnetic effect |
| CN103235031A (en) * | 2013-04-16 | 2013-08-07 | 中南林业科技大学 | Five-point position three-dimensional magnetic field measurement method based on plate stretching pyromagetic effect |
| CN103235031B (en) * | 2013-04-16 | 2014-03-12 | 中南林业科技大学 | Five-point position three-dimensional magnetic field measurement method based on plate stretching pyromagetic effect |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20010613 |