CN219657888U - A pulse-type ultra-high sensitivity handheld miniature metal detector - Google Patents

Abstract

The utility model discloses a pulse ultra-high sensitivity handheld miniature metal detector which comprises a shell, a magnetic field transmitting coil L and at least one pulse induction coil, wherein the magnetic field transmitting coil L and the pulse induction coil are arranged in the shell, the magnetic field transmitting coil and the pulse induction coil are tightly embedded and contacted, and the magnetic field transmitting coil is symmetrically arranged on the central lines of the x axis and the y axis of the magnetic field transmitting coil. Compared with the prior art, the utility model solves the problems of poor sensitivity, inaccurate detection, short-distance detection and high requirements on surrounding environment factors of the metal detector in the prior art, and has the advantages of simple structure processing technology and high recycling rate of parts.

Description

A pulse-type ultra-high sensitivity handheld miniature metal detector

Technical field

The utility model relates to the technical field of safety detection equipment, in particular to a pulse-type ultra-high sensitivity handheld miniature metal detector.

Background technique

Handheld metal detectors are more accurate than security gates and sound alarms through electromagnetic induction of metal objects. It is mainly used to detect metal objects in packages and luggage carried by people. It is generally used in security inspection, customs and other fields to detect the exact location of metal objects carried by people.

Traditional metal detectors all use eddy current induction magneto-electric conversion technology. This type of product mainly detects at close range, and the sensitivity is not high. Sometimes small metals are not easy to detect. The traditional metal detection signal diagram is shown in Figure 1.

Utility model content

The main purpose of this utility model is to propose a pulse-type ultra-high-sensitivity handheld miniature metal detector, aiming to solve the problems of metal detectors in the existing technology that have poor sensitivity, inaccurate detection, close range detection, and high requirements on surrounding environmental factors. question.

In order to achieve the above purpose, the present invention provides a pulse-type ultra-high-sensitivity handheld miniature metal detector, which includes a housing, a magnetic field transmitting coil L and at least one pulse induction coil arranged in the housing, wherein the The magnetic field transmitting coil is in close embedded contact with the pulse induction coil, and the magnetic field transmitting coil is symmetrically arranged on the x-axis and y-axis center lines of the magnetic field transmitting coil.

A further technical solution of the present invention is that the number of the pulse induction coils is one, the pulse induction coils are symmetrically arranged on the x-axis and y-axis center lines of the magnetic field transmitting coil, and the induction of the pulse induction coil group is The maximum inductance and Q value of a single coil are 5 to 10 times that of the minimum inductance and Q value of a single coil.

A further technical solution of the present invention is that the number of the pulse induction coils is one, and two pulse induction coils are symmetrically arranged on the x-axis and y-axis center lines of the magnetic field transmitting coil. The maximum inductance and Q-value single coil of the induction coil of the coil group are 15 to 20 times that of the minimum inductance and Q-value single coil.

A further technical solution of the present invention is to further include a control unit connected to the magnetic field transmitting coil L and at least one pulse induction coil.

This utility model's pulse-type ultra-high-sensitivity handheld miniature metal detector has strong electromagnetic wave conversion ability. After being converted into pulse signals, the extracted detection components are effective in high frequency and highly sensitive detection. The detection area is accurate and reliable, the detection distance is efficient, and the structure and processing technology are simple. , high parts recycling rate.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description These are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of a traditional metal detection signal;

Figure 2 is a schematic diagram of the overall structure of a preferred embodiment of the pulse-type ultra-high-sensitivity handheld miniature metal detector of the present invention;

Figure 3 is a schematic diagram A-A of the coil structure of the preferred embodiment of the pulse-type ultra-high-sensitivity handheld miniature metal detector of the present invention;

Figure 4 is a schematic view A-B of the coil structure of the preferred embodiment of the pulse-type ultra-high-sensitivity handheld miniature metal detector of the present invention;

Figure 5 is a schematic diagram of a standard pulse signal.

The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some of the embodiments of the present utility model, not all of them. Example. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model.

It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), then the directional indications are only used to explain the position of a certain posture (as shown in the accompanying drawings). (shown) relative positional relationship, movement, etc. between the components. If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as instructions or instructions. implying its relative importance or implicitly specifying the quantity of the technical feature indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the meaning of "and/or" appearing in the entire text includes three parallel solutions. Taking "A and/or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions in various embodiments can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist. , nor is it within the protection scope required by this utility model.

Please refer to Figures 2 to 5. The present utility model proposes a pulse-type ultra-high sensitivity handheld miniature metal detector. The preferred embodiment of the present utility model includes a housing 1 and a magnetic field transmitting coil disposed in the housing 1. L and at least one pulse induction coil, wherein the magnetic field transmitting coil and the pulse induction coil are in close embedded contact, and the magnetic field transmitting coil is symmetrically arranged on the x-axis and y-axis center lines of the magnetic field transmitting coil.

Specifically, as an implementation, in this embodiment, the number of the pulse induction coil is one, and the pulse induction coil is symmetrically arranged on the x-axis and y-axis center lines of the magnetic field transmitting coil.

As shown in Figure 3, the pulse-type ultra-high-sensitivity handheld miniature metal detector includes an A-A magnetic field transmitting coil L and a pulse induction coil group L1. The magnetic field transmitting coil L and a pulse induction coil group L1 are in close embedded contact. The pulse induction coil L1 is symmetrically arranged on the x-axis and y-axis center lines of the magnetic field transmitting coil L. The maximum inductance and Q-value single coil of the induction coil of the pulse induction coil group L1 are those of the minimum inductance and Q-value single coil. 5 to 10 times.

As another embodiment, in this embodiment, the number of the pulse induction coils is two, and the two pulse induction coils are symmetrically arranged on the x-axis and y-axis center lines of the magnetic field transmitting coil.

As shown in Figure 4, the pulse-type ultra-high-sensitivity handheld miniature metal detector includes an A-A magnetic field transmitting coil L and a pulse induction coil group L1 and a pulse induction coil group L2. The pulse induction coil group L1 and the pulse induction coil group L2 are set symmetrically. Regarding the x-axis and y-axis center lines of the magnetic field transmitting coil, the maximum inductance and Q-value single coil of the two pulse induction coil groups are 15 to 20 times the minimum inductance and Q-value single coil.

Furthermore, in this embodiment, the pulse-type ultra-high-sensitivity handheld miniature metal detector also includes a control unit connected to the magnetic field transmitting coil L and at least one pulse induction coil.

The working principle of the pulse-type ultra-high-sensitivity handheld miniature metal detector of the present invention is explained below.

Compared with the existing technology, the pulse-type ultra-high-sensitivity handheld miniature metal detector of this utility model is more efficient and sensitive in detection.

Electromagnetic waves are a form of motion of electromagnetic fields.

As shown in Figure 5, the pulse signal is a discrete signal with various shapes, which can represent information or be used as a carrier wave. The pulse signal in the present invention is continuously emitted at a certain voltage amplitude and at a certain time interval.

The magnetic field, the electric field and the direction of the electromagnetic waves in the utility model are perpendicular to each other. The amplitude changes periodically along the vertical direction of the propagation direction, and its intensity is inversely proportional to the square of the distance. The wave itself drives energy, and the energy consumption at any position is proportional to the square of the amplitude.

The utility model is based on pulse signals, and then extracts useful signals from them as detection components. It is not only simple to manufacture and equipment, but also has a larger magnetic field uniform area and relatively high uniformity, so its use value is relatively high. Based on electromagnetic induction resonance, the transmitting coil generates the same electromagnetic field through the system control unit switching signal control. The induction range of the induction coil covered by the transmitting electromagnetic field obtains stable electromagnetic signal operation. The induction coil is connected to the corresponding control unit. When a metal object enters the induction range of the induction coil, the electromagnetic field changes for a short time, causing the signal of the induction coil unit to be detuned. After the induction signal is processed and sampled, the metal object can be accurately determined.

The inductance and Q value of the induction coil of the matrix induction coil group are similar. Stable and equal-sized electromagnetic signals can be obtained by close contact within the electromagnetic field coverage of the transmitting coil and being symmetrical to the axis of the magnetic field transmitting coil. The induction coils simultaneously form their own weak electromagnetic fields to balance each other. Thereby further uniformizing the electromagnetic induction signal obtained, and eliminating the physical properties and layout errors of the induction coil production process. When the electromagnetic interference source enters the electromagnetic field coverage, it causes the electromagnetic signal of the local induction coil to change in a short period of time. The induction coils balance each other so that the overall matrix obtains overall electromagnetic induction stability.

This utility model's pulse-type ultra-high-sensitivity handheld miniature metal detector has strong electromagnetic wave conversion ability. After being converted into pulse signals, the extracted detection components are effective in high frequency and highly sensitive detection. The detection area is accurate and reliable, the detection distance is efficient, and the structure and processing technology are simple. , high parts recycling rate.

The above descriptions are only preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Under the concept of the present utility model, equivalent structural transformations can be made using the contents of the description and drawings of the present utility model, or directly /Indirect applications in other related technical fields are included in the patent protection scope of this utility model.

Claims (4)

1. A pulse-type ultra-high-sensitivity handheld miniature metal detector, characterized in that it includes a housing and a magnetic field transmitting coil L and at least one pulse induction coil disposed in the housing, wherein the magnetic field transmitting coil and The pulse induction coil is closely embedded in contact, and the magnetic field transmitting coil is symmetrically arranged on the x-axis and y-axis center lines of the magnetic field transmitting coil. 2. The pulse-type ultra-high-sensitivity handheld miniature metal detector according to claim 1, characterized in that the number of the pulse induction coil is one, and the pulse induction coil is symmetrically arranged at x of the magnetic field transmitting coil. axis and the center line of the y-axis, the maximum inductance and Q-value single coil of the induction coil of the pulse induction coil group are 5 to 10 times the minimum inductance and Q-value single coil. 3. The pulse-type ultra-high-sensitivity handheld miniature metal detector according to claim 1, characterized in that the number of the pulse induction coils is one, and two of the pulse induction coils are symmetrically arranged on the magnetic field transmitting coil. The x-axis and y-axis center lines, the maximum inductance and Q-value single coil of the induction coils of the two pulse induction coil groups are 15 to 20 times that of the minimum inductance and Q-value single coil. 4. The pulse-type ultra-high-sensitivity handheld miniature metal detector according to any one of claims 1 to 3, characterized in that it further includes a control unit connected to the magnetic field transmitting coil L and at least one pulse induction coil.