Open air speakers gas leakage test macro and method
Technical field
The present invention, about a kind of loud speaker gas leakage test macro and method, refers in particular to a kind of open air speakers gas leakage test macro and method.
Background technology
Prevailing along with various audio-visual amusement, the message archives play in the electronic installations such as sound equipment, computer, TV or mobile phone become current important user's demand, therefore, it is possible to loud speaker electric signal being converted to sound wave also becomes the important periphery electronic installation of modern.Loud speaker can be divided into closed loud speaker and open air speakers according to the design of its loudspeaker box structure, and wherein open air speakers refers to the loud speaker be positioned over by a loudspeaker monomer in an audio amplifier, and audio amplifier is provided with an opening.When the sound wave of loudspeaker monomer rearward radiation reflects through the backboard of audio amplifier, then when reaching the opening on audio amplifier through a calculated path, the phase place of the sound wave of rearward radiation is by identical for the phase place be adjusted to the sound wave of loudspeaker monomer forwards radiation.Because the sound wave of above-mentioned rearward radiation is consistent with the acoustic phase of loudspeaker monomer forwards radiation, therefore the sound wave of rearward radiation and the mutual superimposed rear generation constructive interference of the sound wave of forwards radiation, increase the intensity of low frequency radiation, and then promote the usefulness of loud speaker.
But if when the audio amplifier of open air speakers has air-leak section, air-leak section will cause unconventional sound leakage and form noise, cause the tonequality of open air speakers not good.Therefore, before open air speakers is dispatched from the factory, must test and whether have gas leak phenomenon to guarantee its quality.
The method whether existing test open air speakers leaks gas.For example, utilize open air speakers to play bass to produce air pressure, listened to the surface of open air speakers via detection person by stethoscope, then by having leak free airflow noise to judge whether open air speakers leaks gas.But judging whether open air speakers leaks gas by airflow noise not only needs at substantial detection time, and the judgement of airflow noise is easily subject to human factor impact and judges by accident.
Therefore, in order to increase testing efficiency and the accuracy of open air speakers, need a kind of open air speakers gas leakage test macro and the method for improving the disappearance of prior art.
Summary of the invention
Main purpose system of the present invention provides the open air speakers of a kind of high efficiency and high accuracy to leak gas test macro and method.
In a preferred embodiment, the invention provides a kind of open air speakers gas leakage test macro, whether have gas leak phenomenon in order to test an open air speakers, wherein open air speakers comprises an audio amplifier and audio amplifier has an opening, and system comprises:
One seal, in order to be sticked in opening, with sealed open;
One vacuum generator, in order to make to produce a negative pressure value in this audio amplifier;
One first communicating pipe, in order to be communicated with open air speakers and vacuum generator, wherein one end of the first communicating pipe is stretched in the audio amplifier of open air speakers through seal, and an other end of the first communicating pipe is connected to vacuum generator; And
One device for pressure measurement, in order to measure the equilibrium air pressure value in the audio amplifier of open air speakers; Wherein, one preset negative pressure value by what compare that the equilibrium air pressure value of open air speakers and vacuum generator can produce a non-defective unit audio amplifier and judge whether open air speakers has gas leak phenomenon.
Preferably, this device for pressure measurement comprises one second communicating pipe and a pressure gauge, and wherein stretch into this audio amplifier through the seal inner in one end of this second communicating pipe, and an other end of this second communicating pipe connects this pressure gauge and it is outside to be positioned at this audio amplifier.
Preferably, more comprise a controller, this controller is electrically connected at this pressure gauge, in order to receive this equilibrium air pressure value that this pressure gauge is surveyed, when this equilibrium air pressure value equals this default negative pressure value, judge that this open air speakers is without gas leak phenomenon, when this equilibrium air pressure value is less than this default negative pressure value, judge that this open air speakers has gas leak phenomenon.
Preferably, the seal is a seal be made up of elastic material.
Preferably, more comprise an electromagnetically operated valve, this electromagnetically operated valve is arranged on this communicating pipe, in order to whether to control the circulation of an air-flow in this communicating pipe.
Preferably, more comprise a pressurizer, this pressurizer is arranged on this communicating pipe, in order to stablize the air pressure in this communicating pipe.
Preferably, this vacuum generator comprises a voltage stabilizing module and a switch, and this voltage stabilizing module is in order to stablize the air pressure in this first communicating pipe, and whether this switch in order to control the circulation of this air-flow in this first communicating pipe.
Preferably, this open air speakers more comprises a sound guide tube and a loudspeaker monomer, and this loudspeaker monomer is embedded in this audio amplifier, and this sound guide tube is arranged at this inside, and one end of this sound guide tube is connected to this opening.
In another preferred embodiment, the invention provides a kind of open air speakers gas leakage method of testing, whether have gas leak phenomenon in order to test an open air speakers, wherein open air speakers comprises an audio amplifier and audio amplifier has an opening, and method comprises:
The opening of sealing open air speakers;
Be communicated with a vacuum generator and a device for pressure measurement respectively inner to the audio amplifier of open air speakers;
Start vacuum generator, in order to make to produce a negative pressure value in this audio amplifier;
Air pressure balance between in the audio amplifier of wait vacuum generator and open air speakers;
Measure the equilibrium air pressure value in the audio amplifier of open air speakers; And
The default negative pressure value that the equilibrium air pressure value of comparison open air speakers and vacuum generator can produce a non-defective unit audio amplifier, uses and judges whether open air speakers has gas leak phenomenon.
Preferably, this opening sealing this open air speakers comprises placement one seal and is sticked in this opening.
Preferably, be communicated with this vacuum generator to this audio amplifier inside of this open air speakers to comprise and utilized for one first communicating pipe, wherein one end of this first communicating pipe is stretched in this audio amplifier of this open air speakers through this opening, and the other end of this first communicating pipe is connected to this vacuum generator.
Preferably, be communicated with this device for pressure measurement to this device for pressure measurement of this audio amplifier inside of this open air speakers and comprise one second communicating pipe and a pressure gauge, wherein stretch into this audio amplifier through this opening inner in one end of this second communicating pipe, and an other end of this second communicating pipe connects this pressure gauge and it is outside to be positioned at this audio amplifier.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of open air speakers of the present invention.
Fig. 2 is the profile of open air speakers of the present invention.
Fig. 3 is the schematic diagram of open air speakers of the present invention gas leakage test macro.
Fig. 4 is the flow chart of open air speakers of the present invention gas leakage method of testing.
Fig. 5 is the schematic diagram of another embodiment of open air speakers of the present invention gas leakage test macro.
Symbol description
Open air speakers 10
Loudspeaker monomer 11
Audio amplifier 12
Opening 13
Sound guide tube 14
Loud speaker gas leakage test macro 20,30
Seal, cork 21,31
Vacuum generator 22,32
Voltage stabilizing module 321
Switch 322
First communicating pipe 23,33
One end 231 of first communicating pipe
The other end 232 of the first communicating pipe
Device for pressure measurement 24,34
Second communicating pipe 241,341
Pressure gauge 242,342
One end 243 of second communicating pipe
The other end 244 of the second communicating pipe
Electromagnetically operated valve 25
Pressurizer 26
Controller 27,35
Step S11 ~ S16
One end A of cork
The other end B of cork
Embodiment
Open air speakers of the present invention means that audio amplifier is provided with the loud speaker of opening, such as, apply the loud speakers such as phase inverted cabinet (BassReflexEnclosure), labyrinth type audio amplifier or horn-type audio amplifier.In this preferred embodiment, open air speakers to apply the loud speaker of phase inverted cabinet, but not as limit.
Refer to Fig. 1 and Fig. 2, Fig. 1 is the schematic diagram of open air speakers of the present invention, and Fig. 2 is the profile of open air speakers of the present invention.As shown in Figures 1 and 2, open air speakers 10 comprises loudspeaker monomer 11, audio amplifier 12, opening 13 and a sound guide tube 14.Wherein, loudspeaker monomer 11 is embedded in audio amplifier 12, and opening 13 is arranged at the surface of audio amplifier 12, and sound guide tube 14 is arranged in audio amplifier 12, and one end of sound guide tube 14 is connected to opening 12.Will in hereafter illustrating about opening 13 and the function of sound guide tube 14.
When loudspeaker monomer 11 shakes and produces sound wave, sound wave can be divided into the sound wave to loudspeaker monomer 11 front radiation and the sound wave to loudspeaker monomer 11 Backside radiation.Because people's ear is more insensitive for low-frequency sound wave, if the sound wave to loudspeaker monomer 11 Backside radiation can be derived outside audio amplifier 12, then low frequency radiation can be increased further.But the sound wave of forwards radiation is contrary with the phase place of the sound wave of rearward radiation, if the rearward radiative acoustic wave without any process is directly spread out of audio amplifier 12, then two kinds of sound waves cause the usefulness of loud speaker 10 not good because phase place is different by interfering with each other.Therefore, when rearward radiative acoustic wave is subject to the backboard reflection of audio amplifier 12, and when arriving at the opening 13 on audio amplifier 12 via sound guide tube 14, rearward the phase place of radiative acoustic wave is inverted and becomes anti-phase sound wave, and consistent with the phase place of forwards radiative acoustic wave.Thus, above-mentioned anti-phase sound wave can with forwards radiation sound wave superimposed mutually, and then increase the low frequency radiation of open air speakers 10.Because the configuration and principle of open air speakers 10 is identical with the loud speaker generally applying phase inverted cabinet, will repeat no more in this.
Refer to Fig. 3, Fig. 3 is the schematic diagram of open air speakers of the present invention gas leakage test macro.As shown in Figure 3, open air speakers gas leakage test macro 20 comprises seal 21, vacuum generator 22,1 first communicating pipe 23, one device for pressure measurement 24, electromagnetically operated valve 25, pressurizer 26 and a controller 27.
Seal 21 is sticked in the opening 13 of open air speakers 10, forms enclosure space in order to sealed open 13 to make audio amplifier 12 inside.Seal 21 is chosen as a seal made by elastic material, and wherein elastic material is rubber, cork or plastic cement, but not as limit.In this preferred embodiment, seal 21 for cork, but not as limit.In addition, the first end A that cork 21 comprises and one second end B, wherein the first end A of cork 21 is positioned among open air speakers 10 through opening 13, and the second end B of cork 21 is then positioned at outside open air speakers 10.
In order to avoid producing gap between cork 21 and opening 13 and cannot sealed open 13 smoothly, thus open air speakers 10 inside is caused to form enclosure space, in this preferred embodiment, the opening 13 of open air speakers 10 is a circular open, and cork 21 can adopt the cone that structure is corresponding to opening 13.Moreover the diameter of the first end A of cork 21 is less than the diameter of opening 13, and the diameter of the second end B of cork 21 is greater than the diameter of opening 13, uses the adaptation increased when cork 21 is sticked in opening 13.
Vacuum generator 22 forms vacuum pneumatic by compressed-air actuated flowing, and then extracts the air of audio amplifier 12 inside, makes audio amplifier 12 inside produce a negative pressure value.In addition, after vacuum generator 22 bleeds a Preset Time to a non-defective unit audio amplifier, in such as 5 seconds, the negative pressure value that non-defective unit audio amplifier inside produces will be defined as one and preset negative pressure value.But open air speakers gas leakage test macro of the present invention is not limited with negative pressure, in other embodiments, also can utilize the device producing malleation, makes audio amplifier inside produce a malleation value to test.
First communicating pipe 23 is in order to be communicated with open air speakers 10 and vacuum generator 22, wherein one end 231 of the first communicating pipe 23 is stretched in the audio amplifier 12 of open air speakers 10 through seal 21, and an other end 232 of the first communicating pipe 23 is connected to vacuum generator 22.
Element and the set-up mode of device for pressure measurement 24 are below described.Device for pressure measurement 24 comprises one second communicating pipe 241 and a pressure gauge 242, and wherein the second communicating pipe 241 is in order to be communicated with open air speakers 10 and pressure gauge 242.The inside of audio amplifier 12 is stretched in one end 243 of second communicating pipe 241 through seal 21, an other end 244 Bonding pressure meters 242 of the second communicating pipe 241 and be positioned at the outside of audio amplifier 12.Pressure gauge 242 is known barometer, in order to measure an equilibrium air pressure value of audio amplifier 12 inside.When after the air that vacuum generator 22 extracts in audio amplifier 12, the air pressure of audio amplifier 12 inside balances producing with the air pressure in the first communicating pipe 23 gradually, and forms equilibrium air pressure value in audio amplifier 12 inside.Thus, pressure gauge 242 directly can measure the equilibrium air pressure value of audio amplifier 12 inside through the second communicating pipe 241, and thus the airflow influence produced when not being vulnerable to vacuum generator 22 extracting air is recorded atmospheric pressure value more accurately.
Controller 27 is electrically connected at pressure gauge 242, in order to receive the equilibrium air pressure value measured by pressure gauge 242.When equilibrium air pressure value equals the default negative pressure value that vacuum generator 22 pairs of non-defective unit audio amplifiers can produce, controller 27 judges that open air speakers 10 is without gas leak phenomenon, when equilibrium air pressure value is less than the default negative pressure value that vacuum generator 22 pairs of non-defective unit audio amplifiers can produce, represent that the air outside audio amplifier 12 enters audio amplifier 12 inside via the air-leak section of audio amplifier 12, therefore controller 27 judges that open air speakers 10 has gas leak phenomenon.
In addition, whether control the circulation of air-flow in the first communicating pipe 23, and the air-flow controlled in the first communicating pipe 23 is to stablize the air pressure in the first communicating pipe 23 when conveniently detecting, open air speakers gas leakage test macro 20 is provided with electromagnetically operated valve 25 and pressurizer 26.Wherein, electromagnetically operated valve 25 and pressurizer 26 be arranged at respectively vacuum generator 22 one end but not as limit.Whether electromagnetically operated valve 25 in order to control the circulation of air-flow in the first communicating pipe 23, and when vacuum generator 22 pairs of audio amplifiers 12 are bled after Preset Time, electromagnetically operated valve 25 will be closed, and no longer bleed to audio amplifier 12 to make vacuum generator 22.Pressurizer 26, in order to stablize the air pressure of air-flow in the first communicating pipe 23, to avoid the air pressure change in the first communicating pipe 23 excessive, causes the reading not easily interpretation of pressure gauge 242.In addition, in order to make loud speaker leak gas test automation and test jobs of being more convenient for, electromagnetically operated valve 25 and pressurizer 26 can be electrically connected to controller 27 respectively, and can control via controller 27, but not as limit.
Method of testing about open air speakers gas leakage test macro of the present invention is below described.Refer to Fig. 4, Fig. 4 is the flow chart of open air speakers of the present invention gas leakage method of testing.As shown in Figure 4, open air speakers gas leakage method of testing comprises step S11 ~ S16.First step S11, utilizes seal 21 to close the opening 13 of open air speakers 10, makes audio amplifier 12 inside form enclosure space.Step S12, is communicated with the inside of the audio amplifier 12 of vacuum generator 22 and device for pressure measurement 24 to open air speakers 10 respectively.From the above, the first communicating pipe 23 can in order to be communicated with pressure gauge 242 and the audio amplifier 12 of device for pressure measurement 24 with audio amplifier 12, second communicating pipe 241 in order to be communicated with vacuum generator 22.
Then step S13, starts vacuum generator 22 and starts extracting air, produces negative pressure value in order to make the inside of audio amplifier 12.Step S14, the air pressure balance between in the audio amplifier 12 of wait vacuum generator 22 and open air speakers 10.Step S15, measures the equilibrium air pressure value after the balance in the audio amplifier 12 of open air speakers 10.Step S16, compare that the equilibrium air pressure value of open air speakers 10 and vacuum generator 22 pairs of non-defective unit audio amplifiers can produce one presets negative pressure value, uses and judges whether open air speakers 10 has gas leak phenomenon.When equilibrium air pressure value equals the default negative pressure value of vacuum generator 22, judge that open air speakers 10 is without gas leak phenomenon, when this equilibrium air pressure value is less than the default negative pressure value of vacuum generator, judge that open air speakers 10 has gas leak phenomenon.In this preferred embodiment, the default negative pressure value comparing equilibrium air pressure value and vacuum generator is through the controller 27 being electrically connected at pressure gauge 242 and completes, but not as limit.In other preferred embodiments of the present invention, can pass through the default negative pressure value that reviewer compares equilibrium air pressure value and vacuum generator.
Another preferred embodiment of loud speaker of the present invention gas leakage test macro is then described.Refer to Fig. 5, Fig. 5 is the schematic diagram of another embodiment of open air speakers of the present invention gas leakage test macro.As shown in Figure 5, open air speakers gas leakage test macro 30 is in order to test open air speakers 10.Open air speakers gas leakage test macro 30 comprises seal 31, vacuum generator 32,1 first communicating pipe 33, one device for pressure measurement 34 and a controller 35, and wherein device for pressure measurement 34 comprises one second communicating pipe 341 and a pressure gauge 342.
Open air speakers gas leakage test macro 30 and the open air speakers of Fig. 3 test macro 20 that leaks gas roughly the same, different being in comprises voltage stabilizing module 321 and a switch 322 in vacuum generator 32, and voltage stabilizing module 321 and switch 322 leak gass pressurizer 26 in test macro 20 and electromagnetically operated valve 25 in order to the open air speakers replacing Fig. 3.Wherein, voltage stabilizing module 321 is in order to stablize the air pressure in the first communicating pipe 33, and whether switch 322 in order to control the circulation of air-flow in the first communicating pipe 33.Thus, open air speakers gas leakage test macro 30 additionally need not arrange pressurizer 26 and electromagnetically operated valve 25 also Absorbable organic halogens and air-flow in the first communicating pipe 33 of control.Because the leak gas device of test macro 20 of open air speakers gas leakage test macro 30 and the open air speakers of Fig. 3 is identical with mode of operation, will repeat no more in this.
According to the explanation of above preferred embodiment, open air speakers gas leakage test macro of the present invention and method first utilize vacuum generator to produce negative pressure value to the audio amplifier of open air speakers, the equilibrium air pressure value in audio amplifier is measured through device for pressure measurement, again by the default negative pressure value that the equilibrium air pressure value and vacuum generator that compare open air speakers can produce non-defective unit audio amplifier, and then judge whether open air speakers has gas leak phenomenon.Thus, device for pressure measurement is utilized to replace known stethoscopic gas leakage method of testing, not only reduce the probability of artificial erroneous judgement, increase the efficiency of open air speakers gas leakage test, more because device for pressure measurement directly measures the equilibrium air pressure value of audio amplifier inside, avoid the interference in air flow device for pressure measurement of the generation of vacuum generator, and then promote the precision of the equilibrium air pressure value measuring audio amplifier inside.
The foregoing is only preferred embodiment of the present invention, and be not used to limit claim of the present invention, under therefore all other do not depart from disclosed spirit, the equivalence that completes changes or modifies, and all should be contained in the claim of this case.