CN-122027967-A - Earphone acoustic full-automatic test equipment and method based on intelligent sensor

CN122027967ACN 122027967 ACN122027967 ACN 122027967ACN-122027967-A

Abstract

The invention relates to an earphone acoustic full-automatic test device and method based on an intelligent sensor, which belong to the technical field of performance test devices of audio equipment, wherein the device comprises a base, a vibration isolation cover, a supporting mechanism, a bearing bracket, a lifting module and a sound insulation cover, wherein the supporting mechanism comprises a rotary seat, a fixed bracket, a beryllium bronze spring sheet, a connecting upright post and a miniature piezoelectric ceramic actuator, and also comprises an acoustic wave conduction mechanism, an air supply mechanism, an air suction interface and a fixed clamp.

Inventors

HUANG CHUNLING
Hong Chuchang
ZHANG YONGPENG
HONG CHULING
YANG ZUFAN
ZHANG ZEJIA
LIN XIAOYIN

Assignees

深圳市森少科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260224

Claims (10)

1. Full-automatic earphone acoustic test equipment based on intelligent sensor, its characterized in that includes: A base (1); The vibration isolation cover (2) is fixedly arranged at the top of the base (1), one side of the vibration isolation cover (2) is hinged with two electric push rods I (21) and a sealing door body (22), and the output end of the electric push rods I (21) is hinged with one side of the sealing door body (22) so as to drive the sealing door body (22) to turn over and be attached and sealed with an opening of the vibration isolation cover (2); The support mechanism (3) is fixedly arranged at the top of the base (1) and positioned in the vibration isolation cover (2), and comprises a rotary seat (31) which is rotatably arranged through a rotary bearing, a fixed support (34) is fixedly arranged at the top of the rotary seat (31), the bottom of the fixed support (34) is connected with the same connecting upright post (36) through a plurality of beryllium bronze spring plates (35), silica gel buffer pads (37) are fixedly arranged at two ends of the connecting upright post (36), and a miniature piezoelectric ceramic actuator is embedded in the silica gel buffer pads; the bearing support (5) is fixedly arranged at the top of the base (1) and is positioned at the outer side of the vibration isolation cover (2), the lifting module (6) is fixedly arranged at the top of the bearing support (5), the sliding seat body (61) is fixedly arranged on a sliding plate of the lifting module (6), the sound isolation cover (4) coaxial with the rotary seat (31) is fixedly arranged at the bottom of the sliding seat body (61) through the extending upright post (62), and the sound isolation cover (4) is connected with an external negative pressure device through a pipeline; The miniature piezoelectric ceramic actuator generates high-frequency micro-amplitude vibration and drives the connecting upright post (36) to vibrate synchronously, the vibration is transmitted to the earphone on the fixed support (34) through the beryllium bronze spring piece (35) to simulate chin bone vibration, the sound insulation cover (4) is driven by the lifting module (6) to descend to fit the fixed support (34), and the sound wave is greatly attenuated by matching with the air suction of an external negative-pressure device, so that vibration transmission interference is reduced.
2. The full-automatic earphone acoustic testing device based on the intelligent sensor according to claim 1, further comprising an air supply mechanism (8) and an air draft interface (9), wherein the air supply mechanism and the air draft interface are fixedly arranged outside the vibration isolation cover (2) in a penetrating manner and are oppositely arranged; The air supply mechanism (8) comprises an air supply cylinder body (81), a diffusion cavity (82) is fixedly arranged on one side of the air supply cylinder body (81), an extension section body (83) is fixedly arranged on one side of the diffusion cavity (82), a centrifugal fan (84) is fixedly arranged in the air supply cylinder body (81), and a honeycomb pore plate body (831) is fixedly arranged in the extension section body (83); the air draft interface (9) is conical, the outer end of the air draft interface is connected with external air draft equipment, and the air draft amount is larger than the air intake amount; After the air flow generated by the centrifugal fan (84) is primarily diffused through the diffusion cavity (82), the air flow is dredged by the honeycomb pore plate body (831) to form parallel laminar flow to blow the earphone, and the air suction interface (9) timely extracts the air flow to avoid standing wave noise.
3. The full-automatic earphone acoustic test equipment based on the intelligent sensor according to claim 1, wherein a driving motor (32) is fixedly arranged on the top wall of the base (1), the output end of the driving motor (32) extends to the top of the base (1), the rotary seat (31) is fixedly sleeved at the output end of the driving motor (32), and the driving motor (32) drives the rotary seat (31) to synchronously rotate when working, so that the direction of an earphone microphone on the fixed support (34) is changed, and multi-direction acoustic test is realized.
4. The full-automatic earphone acoustic test equipment based on the intelligent sensor according to claim 3, wherein a fixing clamp (33) is arranged on the supporting mechanism (3), the fixing clamp (33) comprises a fixing base (331) fixedly arranged on the top of the rotary seat (31), two sliding pedestals (332) are slidably arranged on the top of the fixing base (331), the moving direction of the sliding pedestals (332) is perpendicular to the connecting upright post (36), an electric push rod II (336) is hinged to the top of one sliding pedestal (332), the output end of the electric push rod II (336) is hinged to the other sliding pedestal (332), and two clamping jaws (337) are fixedly arranged on the top of the sliding pedestal (332); The electric push rod II (336) drives the two sliding pedestals (332) to approach or separate from each other in a telescopic mode, and clamping fixing or loosening of the connecting upright post (36) is achieved through the clamping jaw (337).
5. The full-automatic earphone acoustic test equipment based on the intelligent sensor according to claim 4, wherein the top of the fixed base (331) is rotatably provided with two synchronous pulleys (333) through a bearing, the outer walls of the two synchronous pulleys (333) are in transmission connection with the same synchronous transmission belt (334), the synchronous transmission belt (334) is fixedly provided with two connecting blocks (335), and the two connecting blocks (335) are fixedly connected with the bottoms of the two sliding pedestals (332) respectively; when the electric push rod II (336) drives one sliding pedestal (332) to move, the connecting block (335) drives the synchronous transmission belt (334) to move, so that the two sliding pedestals (332) can synchronously and reversely move.
6. The full-automatic earphone acoustic testing device based on the intelligent sensor according to claim 1, further comprising two acoustic wave conducting mechanisms (7), wherein the acoustic wave conducting mechanisms (7) comprise a mounting base (72) fixedly arranged on the outer side of the base (1), a sound box (71) is fixedly arranged on the mounting base (72), a flange plate body (73) is fixedly arranged on the outer side of a sound unit of the sound box (71), a plurality of flexible hoses (74) are fixedly arranged on the outer wall of the flange plate body (73) in a penetrating mode, and the other ends of the flexible hoses (74) extend into the vibration isolation cover (2) and are fixedly provided with diffusion cylinders (75); the test noise generated by the sound box (71) is distributed to the flexible hose (74) through the flange plate body (73), and is uniformly diffused into the vibration isolation cover (2) through the diffusion cylinder body (75) to form a uniform sound field.
7. The full-automatic earphone acoustic testing device based on the intelligent sensor, according to claim 6, is characterized in that elastic hooks (76) corresponding to the diffusion cylinders (75) one by one are fixedly arranged on the inner wall of the vibration isolation cover (2), the diffusion cylinders (75) are hung on the corresponding elastic hooks (76), flexible fixing of the diffusion cylinders (75) is achieved, and vibration transmission to the vibration isolation cover (2) is reduced.
8. The full-automatic earphone acoustic testing device based on the intelligent sensor according to claim 1, wherein the vibration isolation cover (2) adopts a double-layer steel plate structure, and soundproof cotton is filled between the two layers of steel plates, so that external environment noise is prevented from entering, internal testing noise is reduced from diffusing outwards, and a quiet environment is provided for earphone testing.
9. A full-automatic earphone acoustic test equipment based on intelligent sensors according to claim 3, characterized in that the clamping surface of the clamping jaw (337) is fixedly provided with a flexible material for enhancing the clamping stability of the connecting upright (36) and avoiding causing rigid damage to the connecting upright (36).
10. The full-automatic earphone acoustic testing method based on the intelligent sensor is characterized by being applied to the full-automatic earphone acoustic testing equipment based on the intelligent sensor as claimed in any one of claims 1 to 9, and comprises the following steps: S1, starting an electric push rod I (21), driving a sealing door body (22) to turn over and open, overlapping an earphone to be tested on a fixed support (34), and adjusting the position of the earphone to be tested so as to be tightly attached to the fixed support (34) and a silica gel buffer pad (37); S2, selecting a test mode according to test requirements, if the bone conduction performance is tested, starting a lifting module (6), driving a sound insulation cover (4) to descend and attach to a fixing support (34), starting an external negative pressure device to exhaust air from the inside of the sound insulation cover (4) to form a sealed sound insulation environment, starting a miniature piezoelectric ceramic actuator, and transmitting vibration to an earphone through a connecting upright post (36) and a beryllium bronze spring piece (35) to finish the test; if the noise reduction performance is tested, starting the sound box (71), and after noise is diffused through the flexible hose (74) and the diffusion cylinder (75), starting the noise reduction function of the earphone to complete the test; If the wind noise resistance is tested, starting an electric push rod II (336) to clamp the connecting upright post (36), starting a centrifugal fan (84) and an air draft device to form a parallel laminar wind field, and starting a wind noise resistance function of the earphone to finish the test; s3, in the testing process, a driving motor (32) can be started to drive the rotary seat (31) to rotate, and the direction of the earphone microphone is exchanged to finish multi-direction testing; S4, after the test is completed, all the components are closed in sequence, the electric push rod I (21) is started to open the sealing door body (22), the electric push rod II (336) is started to loosen the connecting upright post (36), and the earphone is taken out.

Description

Earphone acoustic full-automatic test equipment and method based on intelligent sensor Technical Field The invention belongs to the technical field of performance testing devices of audio equipment, and relates to full-automatic earphone acoustic testing equipment and method based on an intelligent sensor. Background With the rapid development of consumer electronics technology, headphones are used as core equipment for audio output and interaction, the requirements on the testing precision and efficiency of acoustic performance (including bone conduction vibration response, ANC active noise reduction, call noise reduction, wind noise resistance and the like) are continuously improved, quality control and market competitiveness of headphone products are directly affected, at present, the types of testing equipment aiming at the acoustic performance of headphones in the industry are more, but in the practical application process, a plurality of technical defects still exist, and the requirements on high-precision, automatic and multi-dimensional testing cannot be met, and the method is as follows: In earphone bone conduction acoustic performance test scene, current test equipment adopts the fixed vibrations part that simulates human skeleton of rigidity tool generally, vibrations part and test board direct rigid connection, when vibrations part produced the high-frequency vibrations of simulating human chin skeleton, vibration energy can be transmitted to test board and whole equipment frame through rigidity tool fast, produce structure resonance noise, this noise can disturb earphone test signal's collection, lead to test equipment to be unable accurate to distinguish the bone conduction vibration signal that the earphone received and the interference signal that structure resonance produced, test error is great, can't accurately reflect the actual bone conduction acoustic performance of earphone. In the test scene of active noise reduction and conversation noise reduction of earphone ANC, current test equipment is usually fixed the speaker that is used for playing the simulation external noise at test box inner wall directly, and the during operation of speaker, the noise of high decibel can cause the tiny vibration of test box metal wallboard, and this vibration can directly be conducted to high sensitivity test microphone (artifical ear) in the box through the mechanical structure of test box, leads to mixing a large amount of structure conduction noise in the signal that the microphone recorded, and not pure airborne noise, and this kind of vibration conduction interference can seriously influence the accuracy of noise reduction test, can't truly evaluate the noise reduction algorithm effect of earphone, leads to disqualified product inflow market. Disclosure of Invention In view of the above, the present invention provides a full-automatic earphone acoustic testing device and method based on an intelligent sensor. In order to achieve the purpose, the invention provides the following technical scheme that the earphone acoustic full-automatic test equipment based on the intelligent sensor comprises: A base; The vibration isolation cover is fixedly arranged at the top of the base, one side of the vibration isolation cover is hinged with two electric push rods I and a sealing door body, and the output end of each electric push rod I is hinged with one side of the sealing door body so as to drive the sealing door body to turn over and be attached and sealed with the opening of the vibration isolation cover; The support mechanism is fixedly arranged at the top of the base and positioned in the vibration isolation cover, and comprises a rotary seat which is rotatably arranged through a rotary bearing, a fixed support is fixedly arranged at the top of the rotary seat, the bottom of the fixed support is connected with the same connecting upright post through a plurality of beryllium bronze spring plates, the two ends of the connecting upright post are fixedly provided with silica gel buffer pads, and a miniature piezoelectric ceramic actuator is embedded in the silica gel buffer pads; the bearing bracket is fixedly arranged at the top of the base and positioned at the outer side of the vibration isolation cover, the lifting module is fixedly arranged at the top of the bearing bracket, the sliding plate of the lifting module is fixedly provided with a sliding seat body, the bottom of the sliding seat body is fixedly provided with a sound insulation cover coaxial with the rotary seat through an extending upright post, and the sound insulation cover is connected with an external negative pressure device through a pipeline; the miniature piezoelectric ceramic actuator generates high-frequency micro-amplitude vibration and drives the connecting upright post to vibrate synchronously, the vibration is transmitted to the earphone on the fixed support through the beryllium bronze elastic sheet to simulate chin bone vibr