CN2540634Y

CN2540634Y - Magnetic material investigating instrument

Info

Publication number: CN2540634Y
Application number: CN 02217643
Authority: CN
Inventors: 周战波
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-05-21
Filing date: 2002-05-21
Publication date: 2003-03-19
Anticipated expiration: 2012-05-21

Abstract

The utility model provides a magnetic material material, which comprises a probe, an amplifier, a trigger, an alarm and a power, wherein the probe comprises a magnetic ring (3), a coil (2) and a coil core (1), the coil (2) is arranged in the magnetic ring (3), and the coil core (1) is arranged in the coil. The utility model is characterized in that the coil (2) are concatenated by a forward winding and a reverse winding, and the coil core (1) is a magnetic steel. The utility model has the advantages of low cost, convenient detection, high sensitivity and stability.

Description

Magnetic material detector

Technical field

The utility model relates to magnetic material detector, is used for surveying the nonmagnetic substance article and whether is entrained with magnetic material.

Background technology

In timber processing, leather-like processing is in medical treatment, the food inspection, often need to survey the irony thing, as iron nail etc., the free-hand inspection of way usually, x-ray fluoroscopy or use metal detector, preceding a kind of weak effect is used x-ray fluoroscopy, instrument price height, and it is inconvenient, not high with metal detector sensitivity and stability, existing its probe of magnetic materials for general purpose detector is made of magnet ring, unidirectional winding coil, iron-core coil, and it is high that sensitivity and degree of stability are owed.

Summary of the invention

The purpose of this utility model is to provide a kind of cheap, easy to detect, sensitivity and the higher magnetic material detector of stability.

The purpose of this utility model can reach by following technical solution: be made up of probe, amplifier, trigger, alarm, power supply, probe is made of magnet ring, coil, coil core, coil places in the magnet ring, coil core places coil, coil is formed by forward winding and reverse windings in series, and coil core is a magnet steel.

The utility model advantage: detection sensitivity and degree of stability height, survey effective, convenient, cheap to the irony physical prospecting.

Description of drawings

Fig. 1 is the utility model block diagram.

Fig. 2 is the utility model probe.

Fig. 3 is the utility model circuit diagram.

Embodiment

The utility model is made up of probe, signal amplifier, trigger, light crossing-signal, acoustic alarm device, power supply as shown in Figure 1, probe output connects signal amplifier, signal amplifier output connects trigger, trigger output connects light, acoustic alarm device, power supply comprises rectification circuit, filtering circuit, mu balanced circuit, be used to provide each circuit power, signal amplifier, trigger, acoustic alarm device, light crossing-signal, power supply are prior art, signal amplifier is made up of two computing amplifier stages, and two-stage calculation amplifier is respectively by R ₁, R ₂, C ₁, R ₃, IC ₃, R ₄, R ₅, C ₂P ₁, E ₁, IC ₄, R ₆, R ₇, C ₄Form IC ₃, IC ₄Be TL331, trigger comprises trigger circuit, phase inverter, by N ₁, R ₈, IC ₅, C ₅, R ₉, E ₂Form IC ₅Be LM555, by R ₁₀, C ₂, N ₂, R ₁₁, N ₃Form the power amplifier output circuit, J ₂For light, acoustic alarm device, be respectively light emitting diode, hummer, power supply comprises bridge rectifier circuit, two π type filter circuit of pressure-stabilizing, L ₁Be pilot lamp, two π type filter circuit of pressure-stabilizing are respectively by E ₃, C ₇, IC ₁, E ₄, C ₈E ₅, C ₉, IC ₂, E ₆, C ₁₀Form IC ₁, IC ₂Be LM7905CT, power transformer is a toroidal transformer in addition, thereby obtains efficient and degree of stability height, jamproof working power.As shown in Figure 2, probe is by magnet ring 3, coil 2, magnet steel core 1 is formed, coil 2 is formed by forward winding and reverse windings in series, improved the stability of detector, be placed in the magnet ring 3, magnet steel core 1 is seated in the coil 2, the magnet steel core about in the of 1 both ends of the surface polarity with magnet ring about in the of 3 both ends of the surface polarity opposite, the lower surface of magnet ring 3 is provided with iron plate 4, makes the magnet ring 3 lower surface magnetic lines of force intensive in iron plate 4, reduces the interference of magnet ring 3 bottom environment to probe, the utility model housing can be made pocket, also can make bigger body, detect table top the adjustment plate can be set, adjust sensing range with detection table top.

During detection, probe is close to mutually with determinand as far as possible and is done relative motion, if determinand is carried magnetic material secretly, the coil in the probe produces the magnetic induction signal, through two-stage amplification, filtering, input trigger, become pulse signal, pulse signal touches the acoustic alarm device, and chimes of doom takes place, trigger the light warning horn, send visual alarm.

Claims

1, a kind of magnetic material detector, form by probe, amplifier, trigger, alarm, power supply, probe is made of magnet ring (3), coil (2), coil core (1), coil (2) places in the magnet ring (3), coil core (1) places coil, it is characterized in that: coil (2) is formed by forward winding and reverse windings in series, and coil core (1) is a magnet steel.

2, by the described magnetic material detector of claim 1, it is characterized in that: iron plate (4) is set in the magnet ring bottom surface.