一种手持式金属探测器的线圈和手持式金属探测器
By employing at least three winding coils arranged in a coplanar configuration and with an inductively balanced design, the detection performance problem of handheld metal detector coils under weight and size constraints is solved, achieving high sensitivity and low crosstalk detection effects, making it suitable for handheld applications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MINELAB ELECTRONICS
- Filing Date
- 2025-08-19
- Publication Date
- 2026-07-17
Smart Images
Figure CN224518979U_ABST
Abstract
Claims
1. A coil for a handheld metal detector, characterized in that, include: At least three windings, including at least one transmitting winding and at least one receiving winding, wherein the at least one transmitting winding is used to transmit a transmitting magnetic field; The at least one receiving winding is used to receive a receiving magnetic field; The at least three windings are configured and arranged such that the reference plane of each winding is substantially coplanar, the at least three windings are electrically isolated, and the at least three windings are inducedly balanced with each other.
2. The coil of claim 1, wherein The at least one receiving winding includes a multi-turn single-winding group, which occupies at least 90% of the coil area of the at least one receiving winding.
3. The coil of claim 1, wherein The main lobe of the magnetic field pattern of the at least one receiving winding has an attenuation rate less than or equal to the cube of the distance on an axis perpendicular to the plane of the receiving winding at a distance equal to the maximum size of the receiving winding.
4. The coil of claim 1, wherein, Each of the at least three windings is configured and arranged such that magnetic crosstalk between any two windings is minimized to less than 10%.
5. The coil of claim 1, wherein, Each of the at least three windings overlaps with each of the other windings.
6. The coil of claim 1, wherein The at least three windings all revolve around a common point.
7. The coil according to claim 1, characterized in that, Two of the at least three windings each have a series-connected reverse winding, and the reverse windings are coupled to each other.
8. The coil of claim 7, wherein, The reverse winding is a figure-eight shaped winding.
9. The coil of claim 1, wherein, The outer perimeters of the at least three windings form a generally circular or elliptical shape.
10. The coil of claim 1, wherein, The at least three windings include multiple receiving windings and one transmitting winding.
11. The coil of claim 1, wherein, The at least three windings include a receiving winding and multiple transmitting windings.
12. The coil of claim 11, wherein, The multiple transmitting windings emit different transmitting waveforms.
13. The coil of claim 12, wherein, The different transmitted waveforms differ in their spectral composition.
14. The coil of claim 12, wherein, The different transmission waveforms are transmitted at different times.
15. The coil of claim 1, wherein, The combined height of the at least three windings is less than 50 mm.
16. A hand-held metal detector, characterized in that It includes a sensor head, in which the coil of claim 1 is housed.