CN102121998A - Metal detection method for steel wire core conveyor belt - Google Patents
Metal detection method for steel wire core conveyor belt Download PDFInfo
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- CN102121998A CN102121998A CN 201010022596 CN201010022596A CN102121998A CN 102121998 A CN102121998 A CN 102121998A CN 201010022596 CN201010022596 CN 201010022596 CN 201010022596 A CN201010022596 A CN 201010022596A CN 102121998 A CN102121998 A CN 102121998A
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Abstract
The invention relates to the metal detection field of conveyor belts, in particular to a metal detection method for a steel wire core conveyor belt, comprising the following steps of: step 1, obtaining an oscillation working current parameter lnD of a metal detection coil of the steel wire core belt in a normal section; step 2, obtaining the oscillation working current parameter lntD of the metal detection coil of the steel wire core belt in a belt joint section; step 3, collecting signals by a Hall magnetically sensitive detection device and sending the signals into a signal processing control device; step 4, transferring, by the signal processing control device, corresponding comparison parameters lnD or lntD according to the signals sent by the Hall magnetically sensitive detection device; and step 5, collecting an actual working current signal lsD by the metal detection coil, comparing to judge whether the material conveyed on the steel wire core belt contains metal elements or not. The metal detection coil can still achieve metal detection in the joint range of the steel wire core belt; the detection is more accurate without missing detection.
Description
Technical field
The present invention relates to travelling belt metal detection field, relate in particular to a kind of wire-core travelling belt metal detection method.
Background technology
Travelling belt metal detection technology is to adopt magnetic test coil of device on travelling belt, in magnetic test coil, pass through the alternation oscillating current, when having steel and iron parts to pass in the magnetic test coil, in steel and iron parts, produce eddy current, thereby cause the alternation oscillating current loss in the magnetic test coil, testing circuit carries out the judgement that has or not steel and iron parts to exist on the travelling belt workplace by the testing result to the sudden change of current loss amount.Existing travelling belt metal detection technology is a kind of technology that adopts the sudden change amount to detect, and this detection technique can only do to have or not the qualitative judgement of steel and iron parts existence to a certain extent.And there is a large amount of metal wire rope the inside of wire-core travelling belt own, and itself just has metallic character these wire rope, detect extra ironware and utilize prior art to have very big difficulty on the wire-core travelling belt.Particularly the wire-core travelling belt all uses the band conveyor occasion in big load, high-speed, long haul distance, the unit active length is all long, the wire-core travelling belt generally all has a lot of joints like this, and these belt lacing have brought very big difficulty also for the metal detection of wire-core travelling belt.
A kind of technology that is used for the wire-core travelling belt after adopting non-wire-core travelling belt metal detection technology to be transformed is arranged now, though this metal detection device has been done special improvement to being used in wire-core belt occasion, this metal detection device uses a lot of problem that still exists on the wire-core belt.Its apparatus structure is arranged signal as shown in Figure 1, its basic functional principle is: arrange a metal detection coil 2 on wire-core belt 1, traffic direction along wire-core belt 1, in the place ahead of metal detection coil 2, what the reverse side of wire-core belt 1 was arranged a principle of work metalloid magnetic test coil 2 takes the lead magnetic test coil 4.At metal detection coil 2 and take the lead in the magnetic test coil 4 by the alternation oscillating current, when having steel and iron parts to pass in the magnetic test coil, in steel and iron parts, produce eddy current, thereby cause the alternation oscillating current loss in the magnetic test coil, its wire-core with belt is similar to regards a constant continuous quantity as, and the current loss that other factors caused that testing circuit filters in the coil by the adjusting of sensitivity changes.When having the iron and steel foreign matter on the wire-core belt 1 by coil, alternation oscillating current loss meeting in the coil increases suddenly, can produce a voltage jump in the signal processing circuit this moment in the back, if just thinking during the scope that this jump signal is set greater than sensitivity adjusting has the iron and steel foreign matter to exist on the wire-core belt 1, output circuit has been exported iron immediately and has been sneaked into signal.As belt lacing 3 through out-of-date, the overlapping steel wire at belt lacing 3 places partly can arrive earlier takes the lead magnetic test coil 4, the alternation oscillating current loss meeting of taking the lead in the magnetic test coil 4 increases suddenly, export belt lacing 3 this moment through signal, controller is just with output circuit locking a period of time, and having made iron sneak into signal can not export, when waiting for belt lacing 3 fully by metal detection coil 2, again open output circuit again, at this moment having iron to sneak into signal could normal output.
Above-mentioned this pick-up unit is in real work or detection sensitivity is extremely low, can not detect the iron and steel foreign matter that needs to detect scale size.It is extremely many to detect misoperation, influences the carrying out of ordinary production.If the iron and steel foreign matter of sneaking into just in time is in the travelling belt joint,, will cause great threat to the normal operation of travelling belt because its output locking can not normally detect and cause omission.And the magnetic test coil principle of work of taking the lead that the belt lacing detection is adopted is similar to the plain metal pick-up unit, also be to utilize ironware through producing the detection principle of eddy current, it does not exist together with the plain metal pick-up unit only is that installation site and method on travelling belt is different, be installed on a side lower part of belt, if talk about like ironware on the travelling belt and the belt lacing class signal, also can be used as belt lacing to ironware by omission, result of use is bad.
Summary of the invention
Technical matters to be solved by this invention provides a kind of wire-core conveyer belt metal detection method, this detection method adopts Hall magnetosensitive pick-up unit to determine the position of belt lacing, choosing relevant parameters then compares, detect more accurate, and metal that can omission belt lacing zone.
The present invention is achieved in that a kind of wire-core conveyer belt metal detection method, at first, the metal detection coil stationary is arranged, the wire-core belt passes the alternating magnetic field of metal detection coil, traffic direction along the wire-core belt, the place ahead at the metal detection coil, a Hall magnetosensitive of the reverse side fixed and arranged pick-up unit of wire-core belt, and in each the place ahead, belt lacing junction of wire-core belt, imbed a permanent magnet by in the side belt interlayer of Hall magnetosensitive pick-up unit, may further comprise the steps during detection:
Send into signal processing control device after step 3, the Hall magnetosensitive pick-up unit acquired signal;
Step 4, signal processing control device are transferred corresponding reduced parameter l according to the signal that Hall magnetosensitive pick-up unit transmits
NDOr l
NtD
Described signal processing control device comprises PC microprocessor controller, storer and timer.
Described step 1 is specially, operation wire-core belt, and when the normal reach of wire-core belt passed through the metal detection coil, metal detection signal Processing control module was with the metal detection coil concussion working current l that delivers to this moment
Sa, after the A/D change-over circuit converts digital quantity to, obtain l
ND, send into and be kept at l after signal processing control device is handled
NDIn the value storage.
Described step 2 is specially, operation wire-core belt, when the belt lacing of wire-core belt pass through belt lacing pick-up unit top, Hall magnetosensitive pick-up unit sends the signal that belt lacing are about to arrive the metal detection coil, the belt lacing arriving signal is sent into signal processing control device, and metal detection signal Processing control module is with the metal detection coil concussion working current l that delivers to this moment
Sa, after the A/D change-over circuit converts digital quantity to, obtain l
NtD, send into and be kept at l after signal processing control device is handled
NtDIn the value storage.
Described acquisition parameter l
NtDThe time, the time T that begins to gather
CKThe time T lasting with collection
CJDetermine according to the travelling speed of the position of permanent magnet of burying underground in the wire-core belt and belt lacing and wire-core belt and the length of belt lacing;
T
CK=(L1+L3)/V; In the formula, the vertical range that the permanent magnet burial place of L1=begins to the belt lacing section; L3=Hall magnetosensitive pick-up unit is to the distance of metal detection coil; The travelling speed of V=wire-core belt;
T
CJ=L2/V; In the formula, the length of L2=belt lacing; The travelling speed of V=wire-core belt;
Be about to arriving signal when Hall magnetosensitive pick-up unit sends the belt lacing signal, begin to carry out T
CKThe time timing, T
CKTiming time arrives, and the metal detection coil that the PC microprocessor begins delivered to this moment shakes working current l
SaValue after the A/D conversion is gathered, and beginning T
CJThe time timing is up to T
CJTiming time is got maximal value as l to finishing collection with the one group of numerical value that collects
NtDParameter value is sent into signal processing control device.
Described signal processing control device comprises PC microprocessor controller, storer and timer.
Whether the present invention detects belt lacing with Hall magnetosensitive pick-up unit and arrives, data by writing down in the PC microprocessor controller then, choosing relevant parameters controls and compares, in the time that belt lacing arrive, the metal detection coil still can carry out metal detection work, detect more accurately, omission can not take place.
Description of drawings
Fig. 1 is existing wire-core conveyer belt metal detection device synoptic diagram;
The wire-core conveyer belt metal detection device synoptic diagram that Fig. 2 uses for the inventive method.
Among the figure: 1 wire-core belt, 2 metal detection coils, 3 belt lacing, 4 are taken the lead magnetic test coil, 5 permanent magnet, 6 Hall magnetosensitive pick-up units, 7 signal processing control devices.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's statement, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
As shown in Figure 2, a kind of wire-core conveyer belt metal detection device, at first, metal detection coil 2 fixed and arranged, wire-core belt 1 passes metal detection coil 2, along the traffic direction of wire-core belt 1, the place ahead at metal detection coil 2, a Hall magnetosensitive of the reverse side fixed and arranged pick-up unit 6 of wire-core belt 1, and, imbed a permanent magnet 5 by in the side belt interlayer of Hall magnetosensitive pick-up unit 6 in wire-core belt 1 each the place ahead, belt lacing 3 junction.Metal detection coil 2 and Hall magnetosensitive pick-up unit 6 all are connected to signal processing control device 7, control and processing signals, and described signal processing control device 7 comprises PC microprocessor controller, storer and timer.
By the alternation oscillating current, make metal detection coil 2 peripheries produce an alternating magnetic field in metal detection coil 2, wire-core belt 1 passes the alternating magnetic field of metal detection coil 2.The mode that wire-core belt 1 passes metal detection coil 2 alternating magnetic fields can have multiple, as: metal detection coil 2 can place the top or the below of wire-core belt 1, also can be that wire-core belt 1 directly passes metal detection coil 2; The embodiment of this case is that wire-core belt 1 directly passes metal detection coil 2.When the metal ironware passed from alternating magnetic field, alternating magnetic field can produce eddy current in ironware, thereby caused the alternation oscillating current loss in the metal detection coil 2, and the size of eddy current loss causes the concussion working current l of metal detection coil
SaRespective change takes place, the oscillatory work current value is sent in the A/D change-over circuit of PC microprocessor, through one of the conversion generation and the corresponding digital quantity of oscillatory work current value of A/D change-over circuit, the arithmetical unit of sending into the PC microprocessor carries out calculation process.The band conveyor of long haul distance all is to be formed by connecting by several sections or tens of sections belts, generally belt lacing 3 are just arranged every hundreds of rice, in order to guarantee that belt has certain stretching resistance, the interior independent wire strand core wire rope of belt cementation process regulation belt junction is necessary overlapping or change internal placement, and the belt coupling part is that belt lacing 3 generally have several meters long.When travelling belt moved, the belt direction of travel of travelling belt in Fig. 2 advanced from right to left, and permanent magnet 5 is in belt lacing 3 the place aheads, and earlier through Hall magnetosensitive pick-up unit 6, the order through metal detection coil 2 behind the belt lacing 3 moves ahead according to permanent magnet 5.
Utilize a kind of wire-core conveyer belt metal detection method of above device, may further comprise the steps:
Send into signal processing control device after step 3, the Hall magnetosensitive pick-up unit acquired signal;
Step 4, signal processing control device are transferred corresponding reduced parameter l according to the signal that Hall magnetosensitive pick-up unit transmits
NDOr l
NtD
Situation 1: Hall magnetosensitive pick-up unit 6 does not have belt lacing 3 arriving signals, the value l that the PC microprocessor will collect
SDWith l
KD+ (l
ND-l
KD) value of * k is greater than or less than and equals comparison, in the formula: l
KD=l
KaValue after the A/D conversion; K=detects safety factor, span (1.1-2.0).Result treatment relatively: work as l
SD≤ l
KD+ (l
ND-l
KD) during * k, do not have metalwork to sneak on the wire-core belt 1, signal processing control device is not exported " the iron signal is arranged ".Work as l
SD＞l
KD+ (l
ND-l
KD) during * k, have metalwork to sneak on the wire-core belt 1, signal processing control device output " the iron signal is arranged ".In the formula: l
SD=PC microprocessor collects the concussion working current l of metal detection coil in real time
SaValue after the conversion of A/D digital quantity.
Situation 2: Hall magnetosensitive pick-up unit 6 has belt lacing 3 arriving signals, and the PC microprocessor continues the l that collects
SDValue and l
KD+ (l
ND-l
KD) value of * k compares computing, the result treatment after relatively: work as l
SD≤ l
KD+ (l
ND-l
KD) during * k, do not have metalwork to sneak on the wire-core belt 1, signal processing control device is not exported " the iron signal is arranged ".Work as l
SD＞l
KD+ (l
ND-l
KD) during * k, have metalwork to sneak on the wire-core belt 1, metal detection signal Processing control module output " the iron signal is arranged ".The PC microprocessor starts inner first timer simultaneously, with belt lacing T 3 time of arrival
CKValue carry out timing, the first timer timing time arrives, and starts inner second timer, passes through time T with belt lacing 3
CJValue carry out timing, the PC microprocessor is with the l that collects
SDValue and l
KD+ (l
NtD-l
KD) * k value compares computing.Result treatment relatively: work as l
KD≤ l
KD+ (l
NtD-l
KD) during * k, do not have metalwork to sneak on the belt lacing 3, signal processing control device is not exported " the iron signal is arranged ".Work as l
KD＞l
KD+ (l
NtD-l
KD) during * k, have metalwork to sneak on the belt lacing 3, signal processing control device output " the iron signal is arranged ".T up to second timer
CJThe value timing time arrives, and proves that belt lacing 3 have left metal detection coil 2, and this moment, the PC microprocessor was with the l that collects
SDValue and l
KD+ (l
ND-l
KD) value of * k compares, and returns to the processing procedure of situation 1.Arrive up to next belt lacing 3, Hall magnetosensitive pick-up unit 6 has belt lacing 3 arriving signals, carries out the processing procedure of situation 2 again, and two kinds of duties circulation like this is carried out, and stops up to belt conveyer.
l
KDConcussion running parameter when not having metal in the metal detection coil.
Running parameter k, T in the present embodiment
CK, T
CJ, l
KD, l
ND, l
NtDDetermine and gather:
Detect safety factor k and get 1.1.
Start time T
CKDetermine: T
CK=(L1+L3)/V; In this example, L1=0.8 rice; L3=1 rice; The V=2 meter per second; T
CK=(0.8+1)/2=0.9 second.
Gather concluding time T
CJDetermine: T
CJ=L2/V; In this example, L2=2; The V=2 meter per second; T
CJ=2/2=1 second.
Concussion running parameter l when not having metal in the metal detection coil
KDDetermine: the concussion running parameter l when not having metal in the metal detection coil
KD, i.e. the zero load of metal detection coil concussion working current l
KaDigital quantity value after the A/D conversion obtains l through unloaded energising operation in the present embodiment
Ka=2.700mA obtains shaking running parameter l after the A/D conversion
KD=27000.
Belt normal reach metal detection coil concussion running parameter l
NDDetermine: move travelling belt in the present embodiment, when belt normal reach during through the metal detection coil, the metal detection signal processing control device is with the concussion working current l of the metal detection coil delivered to
Na=2.800mA, the PC microprocessor is once gathered every 1 second belt normal reach metal detection coil concussion working current parameter, gathers 20 data altogether, choose maximal value after, after the conversion of A/D digital quantity, obtain l
ND=28000.After above-mentioned running parameter is determined and gathered, be kept in the value corresponding storer after sending the PC microprocessor to handle.
Belt lacing section metal detection coil concussion running parameter l
NtDCollection determine.Move travelling belt in the present embodiment, when the permanent magnet process belt lacing pick-up unit top before the belt lacing, the belt lacing pick-up unit sends the signal that belt lacing are about to arrive the metal detection coil, delivers to the metal detection signal processing control device, and the PC microprocessor begins to carry out T
CK=0.9 second timing when 0.9 second timing time finishes, begins to carry out T
CJ=1 second timing, the PC microprocessor begins to carry out belt lacing section metal detection coil concussion working current parameter was once gathered every 0.1 second simultaneously, finish to 1 second timing time, 10 data have been gathered altogether, through several belt lacing sections are carried out the data acquisition of aforesaid way, choose maximal value at last and obtain l
NtD=28600, the PC microprocessor is kept at these data in the value corresponding storer.
The detection of pick-up metal spare in the transported material on the wire-core belt.Belt conveyer brings into operation when carrying out the ironware detection, the concussion working current value l of the continual collection metal detection of PC microprocessor coil
Sa, the continual collection belt lacing of belt lacing pick-up unit arriving signal.Generally have following two kinds of situations:
State 1: the belt lacing pick-up unit does not have the belt lacing arriving signal, if this moment the PC microprocessor with the concussion working current value l of the metal detection coil that collects
Sa=2.805mA, l after the conversion of A/D digital quantity
SDBe 28050 and l
KD+ (l
ND-l
KD) value of * k compares, the result after: 28050＜27000+ (28000-27000) * 1.1 relatively; l
SD＜l
KD+ (l
ND-l
KD) do not have metalwork to sneak on the * k travelling belt, signal processing control device is not exported " the iron signal is arranged ".If this moment, the PC microprocessor was with the concussion working current value l of the metal detection coil that collects
Sa=2.835mA is l after the digital quantity conversion
SDBe 28350, the result after comparing: 28350＞27000+ (28000-27000) * 1.1; l
SD＞l
KD+ (l
ND-l
KD) have metalwork to sneak on the * k travelling belt, signal processing control device output " the iron signal is arranged ".
State 2: the belt lacing pick-up unit has the belt lacing arriving signal, and the PC microprocessor receives this signal and begins to carry out T
CK=0.9 second timing, and continue the concussion working current value l of the metal detection coil that will collect
Sa, after the conversion of A/D digital quantity, obtain l
SDWith l
KD+ (l
ND-l
KD) value of * k compares.Result treatment relatively is with state 1.When 0.9 second timing time of PC microprocessor finishes, begin to carry out T
CJ=1 second timing, the simultaneously l that collects after with this time of PC microprocessor
SDBe converted to and l
KD+ (l
NtD-l
KD) value of * k compares.If this moment the metal detection coil concussion working current value l
Sa=2.865mA, the l that the PC microprocessor collects after the conversion of A/D digital quantity
SD=28650, the PC microprocessor is with 28650 and l
KD+ (l
NtD-l
KD) value of * k compares.Result relatively: 28650＜27000+ (28600-27000) * 1.1; l
SD＜l
KD+ (l
NtD-l
KD) do not have metalwork to sneak on the * k travelling belt joint, signal processing control device is not exported " the iron signal is arranged ".If this moment the metal detection coil concussion working current value l
Sa=2.890mA, the l that the PC microprocessor collects after the conversion of A/D digital quantity
SD=28900, the PC microprocessor is with 28900 and l
KD+ (l
NtD-l
KD) value of * k compares.Result relatively: 28900＞27000+ (28600-27000) * 1.1; l
SD＞l
KD+ (l
NtD-l
KD) have metalwork to sneak on the * k travelling belt joint, signal processing control device output " the iron signal is arranged ".Up to T
CJ=1 second timing time arrives, and proves that belt lacing have left the metal detection coil, the l that after this PC microprocessor will collect
SDChange back again and l
KD+ (l
ND-l
KD) value of * k compares, and returns to the processing procedure of state 1.Arrive up to next belt lacing, the belt lacing pick-up unit has been sent to the belt lacing arriving signal, carries out the processing procedure of state 2 again, and two kinds of duties circulation like this is carried out, and stops up to belt conveyer.
Claims (5)
1. wire-core conveyer belt metal detection method, it is characterized in that, at first, metal detection coil (2) fixed and arranged, wire-core belt (1) passes the alternating magnetic field of metal detection coil (2), traffic direction along wire-core belt (1), the place ahead in metal detection coil (2), a Hall magnetosensitive of the reverse side fixed and arranged pick-up unit (6) of wire-core belt (1), and in each belt lacing of wire-core belt (1) (3) the place ahead, junction, imbed a permanent magnet (5) by in the side belt interlayer of Hall magnetosensitive pick-up unit (6), may further comprise the steps during detection:
Step 1, normal reach concussion working current parameter l during of obtaining the wire-core belt by the metal detection coil
ND, and send into signal processing control device;
Step 2, belt lacing section concussion working current parameter l during of obtaining the wire-core belt by the metal detection coil
NtD, and send into signal processing control device;
Send into signal processing control device after step 3, the Hall magnetosensitive pick-up unit acquired signal;
Step 4, signal processing control device are transferred corresponding reduced parameter l according to the signal that Hall magnetosensitive pick-up unit transmits
NDOr l
NtD
Step 5, metal detection coil are gathered actual working current signal l
Sa, after the A/D change-over circuit converts digital quantity to, obtain l
SD, send into signal processing control device then, use after the parameter computing selected in the step 4 and l
SDWhether compare, differentiating on the wire-core belt has metalwork to sneak in the transported material.
2. wire-core conveyer belt metal detection method as claimed in claim 1, it is characterized in that: described signal processing control device comprises PC microprocessor controller, storer and timer.
3. wire-core conveyer belt metal detection method as claimed in claim 1 or 2, it is characterized in that: described step 1 is specially, operation wire-core belt, when the normal reach of wire-core belt passed through the metal detection coil, metal detection signal Processing control module was with the metal detection coil concussion working current l that delivers to this moment
Sa, after the A/D change-over circuit converts digital quantity to, obtain l
ND, send into and be kept at l after signal processing control device is handled
NDIn the value storage.
4. wire-core conveyer belt metal detection method as claimed in claim 1 or 2, it is characterized in that: described step 2 is specially, operation wire-core belt, when the belt lacing of wire-core belt pass through belt lacing pick-up unit top, Hall magnetosensitive pick-up unit sends the signal that belt lacing are about to arrive the metal detection coil, the belt lacing arriving signal is sent into signal processing control device, and metal detection signal Processing control module is with the metal detection coil concussion working current l that delivers to this moment
Sa, after the A/D change-over circuit converts digital quantity to, obtain l
NtD, send into and be kept at l after signal processing control device is handled
NtDIn the value storage.
5. wire-core conveyer belt metal detection method as claimed in claim 4 is characterized in that: described acquisition parameter l
NtDThe time, the time T that begins to gather
CKThe time T lasting with collection
CJDetermine according to the position of permanent magnet of burying underground in the wire-core belt and belt lacing and the travelling speed and the belt lacing length of wire-core belt;
T
CK=(L1+L3)/V; In the formula, the vertical range that the permanent magnet burial place of L1=begins to the belt lacing section; L3=Hall magnetosensitive pick-up unit is to the distance of metal detection coil; The travelling speed of V=wire-core belt;
T
CJ=L2/V; In the formula, the length of L2=belt lacing; The travelling speed of V=wire-core belt;
Be about to arriving signal when Hall magnetosensitive pick-up unit sends the belt lacing signal, begin to carry out T
CKThe time timing, T
CKTiming time arrives, and the metal detection coil that the PC microprocessor begins delivered to this moment shakes working current l
SaValue after the A/D conversion is gathered, and beginning T
CJThe time timing is up to T
CJTiming time is got maximal value as l to finishing collection with the one group of numerical value that collects
NtDParameter value is sent into signal processing control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010022596 CN102121998B (en) | 2010-01-08 | 2010-01-08 | Metal detection method for steel wire core conveyor belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010022596 CN102121998B (en) | 2010-01-08 | 2010-01-08 | Metal detection method for steel wire core conveyor belt |
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| Publication Number | Publication Date |
|---|---|
| CN102121998A true CN102121998A (en) | 2011-07-13 |
| CN102121998B CN102121998B (en) | 2013-06-19 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010022596 Active CN102121998B (en) | 2010-01-08 | 2010-01-08 | Metal detection method for steel wire core conveyor belt |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245975A (en) * | 2012-02-08 | 2013-08-14 | 淮南矿业(集团)有限责任公司 | Conveyor belt metal coupling head detection device and metal foreign substance detection system |
| CN105318895A (en) * | 2014-06-20 | 2016-02-10 | 宝山钢铁股份有限公司 | Steel wire liner conveyor belt joint sensing device |
| CN105759314A (en) * | 2014-12-14 | 2016-07-13 | 哈尔滨市三和佳美科技发展有限公司 | Hall electromagnetic position detector |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6253924B1 (en) * | 1998-11-10 | 2001-07-03 | Regents Of The University Of Minnesota | Magnetic separator apparatus and methods regarding same |
| CN1166945C (en) * | 2001-04-30 | 2004-09-15 | 宝山钢铁股份有限公司 | Double detection coil metal probing method and device |
| CN102004266B (en) * | 2009-08-31 | 2012-08-08 | 宝山钢铁股份有限公司 | Metal detecting device for steel wire core conveyer belt |
-
2010
- 2010-01-08 CN CN 201010022596 patent/CN102121998B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245975A (en) * | 2012-02-08 | 2013-08-14 | 淮南矿业(集团)有限责任公司 | Conveyor belt metal coupling head detection device and metal foreign substance detection system |
| CN103245975B (en) * | 2012-02-08 | 2016-04-06 | 淮南矿业(集团)有限责任公司 | The pick-up unit of travelling belt metal coupling head and foreign substance detection system |
| CN105318895A (en) * | 2014-06-20 | 2016-02-10 | 宝山钢铁股份有限公司 | Steel wire liner conveyor belt joint sensing device |
| CN105759314A (en) * | 2014-12-14 | 2016-07-13 | 哈尔滨市三和佳美科技发展有限公司 | Hall electromagnetic position detector |
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| Publication number | Publication date |
|---|---|
| CN102121998B (en) | 2013-06-19 |
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