CN201182003Y - Acoustic antenna for radar - Google Patents

Abstract

The utility model discloses a sound antenna of a radar. The sound antenna is an NdFeB double magnetic circuit speaker and comprises magnetic circuits, a vibration portion and a parabolic reflector portion, wherein, an axial magnetic circuit magnet and a radial magnetic circuit magnet are magnetized twice, an excited vibration system forms a sound source through a horn, and a group of sound bundles with high-strength direction can be obtained; the horn opening is placed on the focus of a paraboloid such that a sound bundle with a radiation angle of 10degrees and ultra strong directivity is obtained, once the output sound voltage is high, the direction of the sound bundle is centralized; the sound antenna has high reliability and small volume, can be used as a radar antenna directly, and can emit sound waves with the center frequency of 3000 Hz, so the antenna is called as a sound antenna. The application value of the speaker is extremely extensive.

Description

The Acoustic antenna of radar

Technical field

The utility model belongs to electro-acoustic element.Specifically, it relates to loud speaker and being connected with radar, as the Acoustic antenna of radar.

Background technology

At present, speaker-use is very extensive both at home and abroad, each is variant on structural design according to its purposes, general loud speaker electroacoustic performance index has certain limitation, its defective is as follows: (one) magnetic circuit system is single magnet, adopt and once magnetize, magnetic energy is low, and the magnetic flux density of magnetic circuit working gas gap can only reach 8000-11000 Gauss; (2) power output is little, can not improve stronger motive force, and sensitivity is low, and the acoustic beam phase interference is unfavorable for the gathering of acoustic beam; (3) vibrating diaphragm adopts the titanium film material to make, and is that voice coil loudspeaker voice coil and vibrating diaphragm are bonding not firm as the shortcoming of high-power horn speaker, and the vibrating diaphragm fatigue durability is poor, is unable to bear powerful impact, and wind resistance and adverse environment resistant are poor, are not suitable for very much the Acoustic antenna as radar.

Summary of the invention

The purpose of this utility model provides a kind of Acoustic antenna that is specially adapted to radar, pass through high sensitivity, power output is big, the sound wave of the horn speaker vibration of double magnetic circuit, one group of acoustic beam that can obtain high highly directive through parabolic reflector propagates into the temperature that is used for measuring cloud layer outside the upper cloud layer, carry out weather prognosis, and every performance index height, Acoustic antenna that also can steady operation under inclement weather conditions.

The utility model is finished by following steps: see accompanying drawing 1, it comprises magnetic circuit, vibration and parabolic reflector body portion, it is characterized in that: magnetic circuit part is by axially, radially double magnetic circuit is formed, the ring of paying of axial magnetic circuit is bonded on the interior garden of axial magnetic circuit magnet, after the magnetic conduction core utmost point is bonded in and pays ring and form assembly above the axial magnet, on the rounded bottom surface of magnetic conductor bowl, its assembly center should be mutually concentric with following magnetic conductor bowl center under packing into; Radially be bonded at down on the rounded bottom surface of magnetic conductor bowl above the aluminium circle of magnetic circuit, magnetic guiding loop is bonded in above the aluminium circle, and radial magnet is bonded in above the aluminium circle, and garden and magnetic conduction core have the magnetic gathering throat between the garden outside extremely in magnetic guiding loop; Oscillating component is the assembly of vibrating diaphragm and the bonding formation of sound film, pack into magnetic gathering throat center between the magnetic conduction core utmost point and the magnetic guiding loop, sound mould circle is bonded on the sound film, the trim ring spiral shell is contained in down on the magnetic conductor bowl, the bonnet spiral shell is contained on the trim ring, constitute the exciter of Acoustic antenna, the exciter of support one end and Acoustic antenna is fastening with screw, and the other end and parabolic reflector body and function screw are fastening.

Parabolic parameter is Y ²=1875, focal length is 468mm.

Radially the magnetic circuit magnet is a watt shape, and solid matter is circular to be bonded in above the aluminium circle; Its axial magnet, radial magnet all carry out secondary and magnetize.

Advantage of the present utility model and good effect, (1) owing to changed the structural design of loud speaker, magnetic circuit system has been realized double magnetic circuit, its leakage field is little, and axial magnet, radial magnet all carry out secondary and magnetize, the magnetic flux density that can make the magnetic circuit gathering throat is 18000～19000 Gausses, has improved the actuating force of loud speaker greatly; (2) the rated characteristic sensitivity of exciter combination can reach 107～108dB/1M1W, and rated frequency range is from 250Hz to 5000Hz; (3) the output acoustic pressure is high, can reach 140 ± 2dB apart from parabolic 2m place's acoustic pressure utmost point maximum when 100w exports; (4) acoustic beam is concentrated, and axial directive property is 3dB when radiation angle is 10 °; (5) this loud speaker is connected the Acoustic antenna as radar with the radar emission system, and can launch its centre frequency of sound wave is 3000Hz, is a kind of high reliability, flexible for installation, the radar Acoustic antenna being convenient to keep in repair.

Description of drawings

Accompanying drawing 1, radar Acoustic antenna sectional arrangement drawing: it comprises, 1 for magnetic conductor bowl, 2 down be radial magnet, 3 for magnetic guiding loop, 4 for the magnetic conduction core utmost point, 5 for axial magnet, 6 for the aluminium circle, 7 for pay ring, 8 for trim ring, 9 for diaphragm, 10 for sound mould circle, 11 for the sound film, 12 for phase modulator, 13 for bonnet, 14 be horn.

Accompanying drawing 2, radar Acoustic antenna schematic diagram: it comprises that 1 is that parabolic reflector, 2 is pillar.

Embodiment

In order to realize that the utility model is described further in conjunction with the accompanying drawings, (one) sees accompanying drawing 1, and following magnetic conductor bowl 1 should adopt A3 or B2 carbon element mild steel, axially, radially adhering with epoxy resin is all adopted at the bonding position of magnetic circuit system; (2) axial magnet 5, radial magnet 2 adopt the Nd-Fe-B magnet material; (3) axial magnet 5 carries out magnetizing the first time with N-S magnetic line of force direction by assembling back, accompanying drawing 1 position; Radial magnet 2 should carry out magnetizing the first time with N-S magnetic line of force direction before assembling; See accompanying drawing 1, the magnet 5 of its axial magnetic circuit, after radially magnet 2 assembling of magnetic circuit finishes again by N-S magnetic line of force direction, from top to bottom double magnetic circuit is carried out magnetizing the second time simultaneously, magnetic flux density with assurance magnetic circuit gathering throat is 18000-19000 Gauss, make the sensitivity of excitation combination rated characteristic improve 3dB, guarantee to reach 107-108dB/1M1W; (4) magnetic guiding loop 3, the magnetic conduction core utmost point 4 adopts the DT4 electrical pure irons, pay ring 7 adopt copper or aluminium all can, trim ring 8 materials are copper coin, for preventing to jump on the radial magnet 2, diaphragm 9 should adopt phenolic resins hot-forming; (5) direction-regulator 12 pm modes are to make sound film 11 be in center, magnetic slit with 1 audio frequency oscillator, can do intermediate frequency phase place and performance adjustment, after magnetic circuit system and vibrational system reasonable combination, refill the exciter of joining bonnet 13 and horn 14 these Acoustic antennas of formation.See accompanying drawing 2, the exciter of pillar 2 one ends and Acoustic antenna is fastening with screw, and the other end and parabolic reflector 1 usefulness screw are fastening.

Claims (3)

1. The Acoustic antenna of 1 radar, it comprises magnetic circuit, vibration and parabolic reflector body portion, it is characterized in that: magnetic circuit part is by axially, radially double magnetic circuit is formed, the ring (7) of paying of axial magnetic circuit is bonded on the interior circle of axial magnetic circuit magnet (5), after the magnetic conduction core utmost point (4) is bonded in and pays ring (7) and the top formation of axial magnet (5) assembly, on the rounded bottom surface of magnetic conductor bowl (1), its assembly center should be mutually concentric with following magnetic conductor bowl (1) center under packing into; Radially be bonded at down on the rounded bottom surface of magnetic conductor bowl (1) above the aluminium circle (6) of magnetic circuit, magnetic guiding loop (3) is bonded in above the aluminium circle (6), radial magnet (2) is bonded in above the aluminium circle (6), and in magnetic guiding loop (3) circle and the magnetic conduction core utmost point (4) cylindrical between have the magnetic slit; Oscillating component is the assembly of vibrating diaphragm (9) and the bonding formation of sound film (11), pack into magnetic gathering throat center between the magnetic conduction core utmost point (4) and the magnetic guiding loop (3), sound mould circle (10) is bonded on the sound film (11), trim ring (8) spiral shell is contained in down on the magnetic conductor bowl (1), bonnet (13) spiral shell is contained on the trim ring (8), constitute the exciter of Acoustic antenna, the exciter of support one end and Acoustic antenna is fastening with screw, and the other end and parabolic reflector body and function screw are fastening.
2. 2 Acoustic antennas according to the described radar of claim 1 is characterized in that: parabolic parameter is Y ²=1875, focal length is 468mm.
3. 3 Acoustic antennas according to the described radar of claim 1 is characterized in that: radially magnetic circuit magnet (2) is a watt shape, and solid matter is circular to be bonded in above the aluminium circle (6); Its axial magnet (5), radial magnet (2) all carry out secondary and magnetize.

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