CN2798110Y - Magnetic needle tester - Google Patents
Magnetic needle tester Download PDFInfo
- Publication number
- CN2798110Y CN2798110Y CN 200520041629 CN200520041629U CN2798110Y CN 2798110 Y CN2798110 Y CN 2798110Y CN 200520041629 CN200520041629 CN 200520041629 CN 200520041629 U CN200520041629 U CN 200520041629U CN 2798110 Y CN2798110 Y CN 2798110Y
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- low frequency
- coil
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- amplifier
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Abstract
The utility model relates to a lossless electromagnet detector, particularly a ferromagnetic type needle detector for detecting dropped needle-shaped ferromagnetic material of toys and fabrics. Two N poles of two coils (11), (12) are earthed after connected; the upper part is provided with magnetic steel, forming a stationary magnetic field; the two coils (11), (12) are connected with a difference amplifier (2); the difference amplifier (2), a low frequency filter (3), a trap circuit (4), an ultra-low frequency amplifier (5) and a threshold trigger (6) are orderly connected. The structure mainly solves the technical problem that the existing needle detectors are easy to generate disturbing signals when in use, and accuracy of detection of equipment is increased.
Description
Technical field:
The utility model relates to a kind of nondestructive electromagnetic pick-up unit, particularly a kind ofly is used to detect the drop ferromagnetic formula needle checking machine of needle-like ferromagnetic material of toy, fabric.
Background technology:
China's utility model patent instructions (Granted publication number: CN2389396Y) disclose a kind of self-tipping type needle checking machine of spicule of dropping on toy, the fabric that is used to detect, formed by frame, probe, gantry, slide plate, electric box, warning device.The platform back is connected with slide plate forwardly, and gantry, slide plate are fixed on the frame, and slide plate passes gantry, slide plate, gantry and frame horizontal line inclination 25-35 degree.Its advantage: self-tipping type needle checking machine volume is little, compact conformation, low cost of manufacture, highly sensitive, rapid operation is easy.But the shortcoming of above-mentioned needle checking machine is, in the time of magnetic material process probe, can form a disturbing signal, and testing result is produced harmful effect.
The utility model content:
The purpose of this utility model provides a kind of ferromagnetic formula needle checking machine, solves the technical matters that is easy to generate disturbing signal when existing needle checking machine uses, and improves the accuracy of Equipment Inspection.
For solving the problems of the technologies described above, the utility model is achieved in that
A kind of ferromagnetic formula needle checking machine, it is characterized in that: the two coil N back ground connection that extremely links to each other, on deploy a magnet steel, form a stationary magnetic field, two coil connects differential amplifier, and differential amplifier, low frequency filter, trap circuit, ultra-low frequency amplifier, threshold trigger connect successively.
The ferromagnetic formula needle checking machine of the above is characterized in that: two coil diameter sum is about 150mm.
The utility model has the advantages that:
The combination of 50Hz trapper and ultra-low frequency amplifier in the device amplifying circuit, the method that this removal 50Hz disturbs has greatly improved sensitivity.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Among the figure:
11-coil; 12-coil;
2-differential amplifier; 3-low frequency filter;
4-trap circuit; 5-ultra-low frequency amplifier;
6-threshold trigger.
Embodiment:
See also Fig. 1, it is the structural representation of the ferromagnetic formula needle checking machine of the utility model.As shown in the figure: the N of two coil 11, the 12 back ground connection that extremely links to each other, on deploy a magnet steel, form a stationary magnetic field, when magnetic material forms a disturbing signal through the coil top, but contain extremely strong 50Hz low frequency signal in this signal.This signal has been offset a large amount of 50Hz low frequency signals because the N of two coil 11,12 links to each other to the N homopolarity; This signal is sent differential amplifier 2 to and is amplified low frequency filter 3 filtering of laggard back, passes through 50Hz trap circuit 4 then again, filtering 50Hz signal; Send ultra-low frequency amplifier 5 to amplify again, send threshold trigger 6 to change into square-wave signal again.
Because two coil 11,12 diameter sums are about 150mm.So detectable width is an object between the 150mm.Can use the multichannel said apparatus when measured object greater than 150mm, be generally N times of 2 coils.
Owing to can produce a pulse to each paths, the Digital Logic method can be adopted in the corresponding relevant position of this pulse when adopting multiplexer channel, makes when certain passage detects metal corresponding pilot lamp bright, and reports to the police, stops.
Being preferred embodiment of the present utility model only in sum, is not to be used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should be technology category of the present utility model.
Claims (2)
1, a kind of ferromagnetic formula needle checking machine, it is characterized in that: the two coil N back ground connection that extremely links to each other, on deploy a magnet steel, form a stationary magnetic field, two coil connects differential amplifier, and differential amplifier, low frequency filter, trap circuit, ultra-low frequency amplifier, threshold trigger connect successively.
2, ferromagnetic formula needle checking machine according to claim 1, it is characterized in that: two coil diameter sum is about 150mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520041629 CN2798110Y (en) | 2005-05-18 | 2005-05-18 | Magnetic needle tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520041629 CN2798110Y (en) | 2005-05-18 | 2005-05-18 | Magnetic needle tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2798110Y true CN2798110Y (en) | 2006-07-19 |
Family
ID=36869356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520041629 Expired - Fee Related CN2798110Y (en) | 2005-05-18 | 2005-05-18 | Magnetic needle tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2798110Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851931A (en) * | 2012-08-29 | 2013-01-02 | 昆山市万丰制衣有限责任公司 | Alloy detection equipment for textile machine |
-
2005
- 2005-05-18 CN CN 200520041629 patent/CN2798110Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851931A (en) * | 2012-08-29 | 2013-01-02 | 昆山市万丰制衣有限责任公司 | Alloy detection equipment for textile machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |