CN206892035U - A kind of acoustical testing device and acoustical testing device - Google Patents
A kind of acoustical testing device and acoustical testing device Download PDFInfo
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- CN206892035U CN206892035U CN201720854556.6U CN201720854556U CN206892035U CN 206892035 U CN206892035 U CN 206892035U CN 201720854556 U CN201720854556 U CN 201720854556U CN 206892035 U CN206892035 U CN 206892035U
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- acoustical
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Abstract
The utility model provides a kind of acoustical testing device and acoustical testing device, belongs to acoustical behavior test equipment field.Acoustical testing device includes testing tube, acoustical generator, microphone, heating element and the first radiating piece.Testing tube is internally formed closed cavity.Acoustical generator and heating element are located at the both ends of testing tube respectively, and acoustical generator is located in closed cavity.Microphone is extended in closed cavity, and microphone is close to acoustical generator.First radiating piece is sheathed on the outside of testing tube, and the first radiating piece includes separating by heat shield along the heat shield being axially distributed and at least two fin of testing tube, adjacent two fin.Two adjacent fin in first radiating piece are separated by heat shield, reduce the heat transfer between two adjacent fin, and the heat inside testing tube is absorbed step by step by all fin, and the first radiating piece can play good radiating and cooling effect to testing tube.
Description
Technical field
Acoustical behavior test equipment field is the utility model is related to, in particular to a kind of acoustical testing device and sound
Learn tester.
Background technology
In the sound absorption qualities under studying porous metal material high temperature and cavity condition, acoustical testing is often applied to
Device, to be carried out under the different condition such as room temperature, steady temperature field (100 DEG C~700 DEG C) to the attracting performance of porous metal material
Test.
Acoustical testing device generally comprises acoustical generator, microphone, testing tube and heating element, and heating element and acoustical generator are arranged on survey
The both ends of test tube, microphone extend in testing tube and close to acoustical generator, the effect of microphone be that sound in testing tube is entered
Row collection.When being tested, it is necessary to which testing tube to be set to the temperature control of the position of microphone within 50 DEG C.Therefore, need
Testing tube is cooled before hot-fluid reaches microphone working region after being heated to test specimen, traditional mode is to survey
Thermal insulation barriers are set in test tube, have reached the purpose of heat insulation and heat control, this mode cooling-down effect is poor, transmission easily to transaudient ripple is made
Into influence.
Utility model content
The purpose of this utility model is to provide a kind of acoustical testing device, to improve cooling of the traditional approach to testing tube
The problem of effect difference.
The purpose of this utility model is to provide a kind of acoustical testing device, imitated with improving cooling of the traditional approach to testing tube
The problem of fruit difference.
What the utility model was realized in：
Based on above-mentioned first purpose, the utility model, which provides, includes testing tube, acoustical generator, microphone, heating element and first
Radiating piece；
The testing tube is internally formed closed cavity；
The acoustical generator and heating element are located at the both ends of testing tube respectively, and acoustical generator is located in the closed cavity, transaudient
Device is extended in the closed cavity, and microphone is close to acoustical generator；
First radiating piece is sheathed on the outside of the testing tube, and first radiating piece is included along the testing tube
The heat shield and at least two fin being axially distributed, adjacent two fin are separated by the heat shield.
Further, the first depressed part is formed on the testing tube, first radiating piece is located at first depressed part
Place；
First depressed part has relative the first wall and the second wall, the both ends of first radiating piece respectively with it is described
First wall and the contact of the second wall.
Further, the testing tube includes the first body and the second body, first body and second body
It is detachably connected, first tubular body connects with second tubular body；
First depressed part is formed between first body and second body.
Further, first wall and second wall are annular.
Further, the acoustical testing device also includes the second radiating piece, and second radiating piece is sheathed on the survey
The outside of test tube；
Second radiating piece is provided with inlet and liquid outlet, and second radiating piece is internally formed accommodating chamber, described
Inlet and the liquid outlet connect with the accommodating chamber.
Further, the accommodating chamber is annular, and the accommodating chamber is surrounded on the outside of the testing tube.
Further, the second depressed part is formed on the testing tube, second radiating piece is located at second depressed part
Place；
Second depressed part has relative the 3rd wall and the 4th wall, the both ends of second radiating piece respectively with it is described
3rd wall and the contact of the 4th wall.
Further, testing tube includes the 3rd body and the 4th body, and the 3rd body and the 4th body are removable
Connection is unloaded, the 3rd tubular body connects with the 4th tubular body；
Second depressed part is formed between 3rd body and the 4th body.
Further, the 3rd wall and the 4th wall are annular.
Based on above-mentioned second purpose, the utility model provides a kind of acoustical testing device, including controller, temperature sensor and
Above-mentioned acoustical testing device, the heating element inside are provided with heating resistor, and the heating resistor electrically connects with the controller,
The temperature sensor is used to detect the temperature inside the heating element, and the temperature sensor electrically connects with the controller.
The beneficial effects of the utility model are：
The utility model provides a kind of acoustical testing device, in use, test specimen be arranged in detection pipe and close to plus
Hot device, after heater heats to test specimen, heat inside testing tube is by the work block transitive from heating zone to microphone.By
The first radiating piece is provided with the outside of testing tube so that during heat inside testing tube is from heating zone to work block transitive
Most of heat will be absorbed by the first radiating piece.And two adjacent fin in the first radiating piece are separated by heat shield,
Reduce the heat transfer between two adjacent fin, the heat inside testing tube is absorbed and is dissipated to step by step by all fin
The external world, the first radiating piece can play good radiating and cooling effect to testing tube.In addition, the first radiating piece is located at the outer of testing tube
Side, the transmission of transaudient ripple will not be impacted.
The utility model provides a kind of acoustical testing device, including controller, temperature sensor and above-mentioned acoustical testing dress
Put, there are all advantages of above-mentioned acoustical testing device.Controller can be by the temperature control inside heating element in required temperature
In the range of degree.
Brief description of the drawings
, below will be to required use in embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment
Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should not be by
Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other related accompanying drawings according to these accompanying drawings.
Fig. 1 is the structural representation for the acoustical testing device that the utility model embodiment 1 provides；
Fig. 2 is the structural representation of the testing tube shown in Fig. 1；
Fig. 3 is the structural representation of the heating element shown in Fig. 1；
Fig. 4 is the structural representation of the first radiating piece shown in Fig. 1；
Fig. 5 is the topology view of the heat shield shown in Fig. 4；
Fig. 6 is the structural representation of the fin shown in Fig. 4；
Fig. 7 is the structural representation for the acoustical testing device that the utility model embodiment 2 provides；
Fig. 8 is the structural representation of the second radiating piece shown in Fig. 7；
Fig. 9 is the structural representation for the acoustical testing device that the utility model embodiment 3 provides；
Figure 10 is the structural representation of the testing tube shown in Fig. 9；
Figure 11 is the structural representation of the first body shown in Figure 10；
Figure 12 is the structural representation of the 3rd body shown in Figure 10；
Figure 13 is the structural representation of the 4th body shown in Figure 10；
Figure 14 is the structural representation for the acoustical testing device that the utility model embodiment 4 provides.
Icon：100- acoustical testing devices；10- testing tubes；11- closed cavities；12- bodys；13- pipe closes；14- first is managed
Body；The cylinders of 141- first；The cylinders of 142- second；The walls of 143- first；The bodys of 15- second；The bodys of 16- the 3rd；The walls of 161- second；
The walls of 162- the 3rd；The bodys of 17- the 4th；The cylinders of 171- the 3rd；The cylinders of 172- the 4th；The walls of 173- the 4th；The depressed parts of 18- first；19-
Second depressed part；20- acoustical generators；21- microphones；30- heating elements；31- shells；32- heating resistors；33- receiving spaces；34-
Butt hole；The radiating pieces of 40- first；41- heat shields；The centre bores of 411- first；The mounting holes of 412- first；413- first end faces；
414- second end faces；The first annular projections of 415-；The first annular grooves of 416-；42- fin；The centre bores of 421- second；422-
Second mounting hole；The end faces of 423- the 3rd；The end faces of 424- the 4th；The annular protrusions of 425- second；The annular grooves of 426- second；43- connects
Fitting；44- poling passages；50- test specimens；The radiating pieces of 60- second；The centre bores of 61- the 3rd；62- accommodating chambers；63- inlets；
64- liquid outlets；200- acoustical testing devices；210- controllers；220- temperature sensors.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, rather than whole embodiments.Generally here described in accompanying drawing and
The component of the utility model embodiment shown can be configured to arrange and design with a variety of.
Therefore, the detailed description of the embodiment of the present utility model to providing in the accompanying drawings is not intended to limit requirement below
The scope of the utility model of protection, but it is merely representative of selected embodiment of the present utility model.Based in the utility model
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of the utility model protection.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the utility model can
To be mutually combined.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.
, it is necessary to which explanation, indicating position or position relationship are based on accompanying drawing in the description of the utility model embodiment
Shown orientation or position relationship, or the utility model product using when the orientation usually put or position relationship, or
The orientation or position relationship that those skilled in the art usually understand, or the utility model product using when usually put
Orientation or position relationship, it is for only for ease of description the utility model and simplifies description, rather than indicates or imply signified dress
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model
Limitation.In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and it is not intended that instruction or hint phase
To importance.
In the description of the utility model embodiment, it is also necessary to explanation, unless otherwise clearly defined and limited, art
Language " setting ", " installation ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or
It is integrally connected；Can be directly connected to, can also be indirectly connected with by intermediary.For one of ordinary skill in the art
For, concrete meaning of the above-mentioned term in the utility model can be understood with concrete condition.
Embodiment 1
As shown in figure 1, the present embodiment provides a kind of acoustical testing device 100, including testing tube 10, acoustical generator 20, heating
The radiating piece 40 of device 30 and first, for acoustical generator 20 in testing tube 10, acoustical generator 20 and heating element 30 are located at testing tube 10 respectively
Both ends, microphone 21 extended in testing tube 10 close to acoustical generator 20, microphone 21, and the first radiating piece 40 is sheathed on test
The outside of pipe 10, for being radiated to testing tube 10.
Wherein, as shown in Fig. 2 testing tube 10 is internally formed closed cavity 11.Testing tube 10 includes body 12 and pipe close 13,
Body 12 is cylindric, and body 12 is one end open structure, and the external diameter of pipe close 13 is equal with the external diameter of body 12, and pipe close 13 is spirally connected
In one end that body 12 is open and formed closed.
Acoustical generator 20 is sound generation source.In the present embodiment, acoustical generator 20 is microphone.
Microphone 21 is condenser microphone, and its model MPA416, its effect is that sound in testing tube 10 is adopted
Collection.
As shown in figure 3, heating element 30 includes shell 31 and heating resistor 32, shell 31 is made up of insulation material, shell 31
For hollow cylinder structure；For the annular spread of heating resistor 32 in shell 31, heating resistor 32 is internally formed receiving space 33；Shell
31 are provided with the butt hole 34 for leading to receiving space 33.
As shown in figure 4, the first radiating piece 40 is circular ring structure.First radiating piece 40 includes heat shield 41, the and of fin 42
Connector 43, fin 42 are connected with heat shield 41 by connector 43.
Heat shield 41 is made up of heat-insulated material, and in the present embodiment, the material of heat shield 41 is polyether-ether-ketone.As shown in figure 5,
Heat shield 41 is circular lamellar body, and the centre position of heat shield 41 is provided with the first centre bore 411 passed through for testing tube 10, first
The aperture of centre bore 411 and the external diameter of the body 12 of testing tube 10 match, and heat shield 41, which is provided with, multiple to be circumferentially distributed
First mounting hole 412.Heat shield 41 has two relative first end faces 413 and second end face 414, is set in first end face 413
Having first annular raised 415, second end face 414 is provided with first annular groove 416, and first annular raised 415 and first annular
Groove 416 is coaxially disposed with the first centre bore 411.
Fin 42 is made up of the preferable material of heat conductivility, and in the present embodiment, the material of fin 42 is copper.Such as Fig. 6
Shown, fin 42 is circular lamellar body, and the centre of fin 42 is to be provided with the second centre bore 421 passed through for testing tube 10,
The aperture of second centre bore 421 is equal with the aperture of the first centre bore 411.Fin 42 be provided with it is multiple be circumferentially distributed the
Two mounting holes 422.Fin 42 has two relative the 3rd end faces 423 and the 4th end face 424, and the 3rd end face 423 is provided with
For the second annular protrusion 425 coordinated with first annular groove 416, the 4th end face 424 be provided be used for it is first annular convex
Play 415 the second annular grooves 426 coordinated, the second annular protrusion 425 and the second annular groove 426 with the second centre bore 421
It is coaxially disposed.
In the present embodiment, connector 43 is bolt.
As shown in figure 4, heat shield 41 is two, fin 42 is three, all fin 42 and all heat shields 41 phases
Mutually stack, adjacent two fin 42 are separated by a heat shield 41, first annular raised 415 on heat shield 41 and one
The second annular groove 426 on fin 42, which is formed, to be coordinated, the first annular groove 416 on the heat shield 41 and another radiating
The second annular protrusion 425 on piece 42, which is formed, to be coordinated, so as to finally to form positioning between heat shield 41 and fin 42.It is heat-insulated
After being positioned between piece 41 and fin 42, the first centre bore 411 on heat shield 41 and the second centre bore 421 on fin 42
Align and form poling passage 44, the first mounting hole 412 on heat shield 41 aligns with the second mounting hole 422 on fin 42
Bar passage is formed, bolt fixes all heat shields 41 with fin 42 through bar passage, finally constitutes the first radiating piece
40。
As shown in figure 1, acoustical generator 20 is fixed on one end of testing tube 10, acoustical generator 20 is located at the closed cavity of testing tube 10
In 11, one end that testing tube 10 is provided with pipe close 13 is extended in receiving space 33 through the butt hole 34 of heating element 30, testing tube
10 threadingly realize with the shell 31 of heating element 30 and are detachably connected.Microphone 21 is extended in testing tube 10, transaudient
Device 21 is close to acoustical generator 20.First radiating piece 40 is placed on the body 12 in the outside of the body 12 of testing tube 10, i.e. testing tube 10
It is arranged in poling passage 44.Heat shield 41, fin 42 in first radiating piece 40 are distributed along the axial direction of testing tube 10.First
Radiating piece 40 is between microphone 21 and heating element 30.In the present embodiment, the first radiating piece 40 passes through welding with testing tube 10
Mode be fixedly connected.In other specific embodiments, the first radiating piece 40 can also be flexibly connected with testing tube 10, than
Such as, the first radiating piece 40 is directly sleeved on the outside of testing tube 10, and the first radiating piece 40 can be slid axially along testing tube 10 to adjust
Position.
In use, pulling down testing tube 10 from heater, and the pipe close 13 of testing tube 10 is opened, test specimen 50 is (more
Mesoporous metal material) it is placed in testing tube 10, then pipe close 13 is covered, testing tube 10 is connected with heater so that test specimen
50 in heater.After i.e. heater heats to test specimen, heat testing tube 10 inside is by from adding where test specimen 50
Work block transitive of the hot-zone to the place of microphone 21.Because the outside of testing tube 10 is provided with the first radiating piece 40 so that testing tube
Heat inside 10 from heating zone to work block transitive during most of heat will be absorbed by the first radiating piece 40.And first
Two adjacent fin 42 in radiating piece 40 are separated by heat shield 41, are reduced between two adjacent fin 42
Heat transfer, the heat inside testing tube 10 are absorbed and are dissipated to the external world step by step by all fin 42, and the first radiating piece 40 can be to surveying
Test tube 10 plays good radiating and cooling effect.First radiating piece 40 is in radiation processes, close to heating in the first radiating piece 40
The temperature of the fin 42 of device 30 is higher than the temperature of the fin 42 of remote radiator.In addition, the first radiating piece 40 is positioned at test
The outside of pipe 10, the transmission of transaudient ripple will not be impacted.
In the present embodiment, the fin 42 in the first radiating piece 40 is three, and heat shield 41 is two, two fin 42
Three fin 42 are separated two-by-two, reduce the heat transfer between fin 42.In other specific embodiments, the first radiating piece
Fin 42 in 40 can be two or more other numbers, adjacent two fin 42 by heat shield 41 every
Open, i.e. the number of fin 42 one fewer than the number of heat shield 41 all the time.
It should be noted that the thickness of the fin 42 in the first radiating piece 40 be able to can not also be waited with equal.This implementation
In example, it is located at the thickness of middle fin 42 in the first radiating piece 40 in its axial direction more than the fin 42 positioned at both ends
Thickness.The thickness of heat shield 41 in first radiating piece 40 be able to can not also be waited with equal.In the present embodiment, the first radiating piece
Thickness in 40 in its axial direction close to the heat shield 41 of heater is more than the thickness of the heat shield 41 away from heater.
Embodiment 2
As shown in fig. 7, the present embodiment provides a kind of acoustical testing device 100, the difference with above-described embodiment is, acoustics
Test device 100 also includes the second radiating piece 60.
The material of second radiating piece 60 is copper.As shown in figure 8, the second radiating piece 60 is loop configuration, intermediate position is set
There are the 3rd centre bore 61 that the body 12 for testing tube 10 passes through, the aperture of the 3rd centre bore 61 and the body 12 of testing tube 10
External diameter matches.Second radiating piece 60 is internally formed accommodating chamber 62, and accommodating chamber 62 is annular.Second radiating piece 60 is provided with feed liquor
Mouth 63 and liquid outlet 64, inlet 63 and liquid outlet 64 connect with accommodating chamber 62, the position of inlet 63 and liquid outlet
64 position is at a distance of 180 degree.
As shown in fig. 7, the second radiating piece 60 is placed on the outside of the body 12 of testing tube 10, i.e. the body 12 of testing tube 10 is worn
In the 3rd centre bore 61, the second radiating piece 60 is fixed on the outside of the body 12 of testing tube 10 by way of welding.The
Two radiating pieces 60 are between the first radiating piece 40 and heater.Accommodating chamber 62 in second radiating piece 60 is surrounded on testing tube 10
Outside.In other embodiments, the second radiating piece 60 is connected with testing tube 10 or interaction, such as, the second radiating piece 60
The outside of testing tube 10 is directly sleeved on, the second radiating piece 60 can move axially on testing tube 10, to adjust the second radiating piece 60
Position.
In use, can be in the continuous injection coolant into inlet 63, coolant is full of will be from going out after in accommodating chamber 62
Flowed out in liquid mouth 64.A part of heat that the flowing of coolant in second radiating piece 60 will be taken away on testing tube 10.And accommodate
Chamber 62 is the annular chamber around testing tube 10, and coolant can take away the heat in the whole circumference of testing tube 10, good heat dissipation effect.
In the present embodiment, the first radiating piece 40 and the second radiating piece 60 form two-stage radiation, further improve radiating effect
Fruit, the heat inside testing tube 10 can be taken away well, so that the temperature of the workspace where microphone 21 is positioned at regulation model
In enclosing.
Remaining structure of the present embodiment is same as Example 1, will not be repeated here.
Embodiment 3
As shown in figure 9, the present embodiment provides a kind of acoustical testing device 100, the difference with embodiment 2 is, testing tube
10 structure is different.
As shown in Figure 10, testing tube 10 includes the first body 14 and the second body 15, the first body 14 and the second body 15
It is detachably connected.
Wherein, as shown in figure 11, the first body 14 includes the first cylinder 141 and the second cylinder 142 that are coaxially disposed, and first
Cylinder 141 is one end open structure, and the second cylinder 142 is both ends open structure, and the external diameter of the second cylinder 142 is less than the first cylinder
141 internal diameter, the aperture of the external diameter of the second cylinder 142 and the first centre bore 411 of fin 42 match.First cylinder 141
Be connected between the second cylinder 142 by the first wall 143, the first wall 143 for annular, the inside of the first cylinder 141 with second
The inside connection of body 142.That is, the first cylinder 141 is transitioned into the second cylinder 142 by the first wall 143.
Second body 15 includes the 3rd body 16 and the 4th body 17, and the 3rd body 16 detachably connects with the 4th body 17
Connect.
As shown in figure 12, the both ends of the 3rd body 16 are hatch frame, and the both ends of the 3rd body 16 are respectively equipped with the second wall 161
With the 3rd wall 162, the second wall 161 and the 3rd wall 162 are loop configuration, the internal diameter of the second wall 161 and the second cylinder 142 it is outer
Footpath matches.
As shown in figure 13, the 4th body 17 includes the 3rd cylinder 171 and the 4th cylinder 172, and the 3rd cylinder 171 is opened for one end
Mouth structure, the 4th cylinder 172 are both ends open structure, and the external diameter of the 4th cylinder 172 is less than the internal diameter of the 3rd cylinder 171, the 4th
The aperture of the external diameter of cylinder 172 and the 3rd centre bore 61 of the second radiating piece 60 matches, the external diameter and the 3rd of the 4th cylinder 172
The internal diameter of wall 162 matches.Connected between 3rd cylinder 171 and the 4th cylinder 172 by the 4th wall 173, the 4th wall 173 is ring
Shape, the inside of the 3rd cylinder 171 connect with the inside of the 4th cylinder 172.That is, the 3rd cylinder 171 passes through the 4th wall 173
It is transitioned into the 4th cylinder 172.
As shown in Figure 10, the second cylinder 142 and the second wall 161 are spirally connected and form sealing so that the inside of the first body 14
Connected with the inside of the 3rd body 16.First wall 143 and the second wall 161 are relative, the first wall 143, the second cylinder 142 and the second wall
161 form the first depressed part 18.4th cylinder 172 and the 3rd wall 162 are spirally connected and form sealing so that the inside of the 3rd body 16
Connected with the inside of the 4th body 17.3rd wall 162 and the 4th wall 173 are relative, the 3rd wall 162, the 4th cylinder 172 and the 4th wall
173 form the second depressed part 19.
As shown in figure 9, the first radiating piece 40 is stuck at the first depressed part 18, i.e., the first radiating piece 40 is placed on the second cylinder
142 outside, the both ends of the first radiating piece 40 contact with the first wall 143 with the second wall 161 respectively.Second radiating piece 60 is stuck in
At two depressed parts 19, i.e. the second radiating piece 60 is placed on the outside of the 4th cylinder 172, the both ends of the second radiating piece 60 respectively with the 3rd wall
162 contact with the 4th wall 173.Acoustical generator 20 is fixed in the first cylinder 141, and microphone 21 is extended in the first cylinder 141, the
The butt hole 34 of three cylinders 171 through heating element 30 is extended in receiving space 33.
In the present embodiment, the first body 14 is detachably connected with the 3rd body 16, and the first radiating piece 40 is clamped in
Between one wall 143 and the second wall 161, it is easy to the dismounting and fixation of the first radiating piece 40.In addition, the first wall 143 and the second wall 161
Contacted with the first radiating piece 40, increase the contact area of the radiating piece 40 of testing tube 10 and first, the heat being easy in testing tube 10
Amount be capable of axial direction pass to the first radiating piece 40, enhance radiating effect.3rd body 16 detachably connects with the 4th body 17
Connect, and the second radiating piece 60 is clamped between the 3rd wall 162 and the 4th wall 173, is easy to the dismounting of the second radiating piece 60 and is consolidated
It is fixed.In addition, the 3rd wall 162 and the 4th wall 173 contact with the second radiating piece 60, the radiating piece 60 of testing tube 10 and second is increased
Contact area, the heat being easy in testing tube 10 be capable of axial direction pass to the second radiating piece 60, enhance radiating effect.
Remaining structure of the present embodiment is same as Example 2, will not be repeated here.
Embodiment 4
As shown in figure 14, the present embodiment provides a kind of acoustical testing device 200, including controller 210, temperature sensor 220
With the acoustical testing device 100 in above-described embodiment 3.
Controller 210 is temperature controller, and temperature sensor 220 is located in the receiving space 33 of heating element 30, temperature sensor
220 electrically connect with temperature controller, and the heating resistor 32 in heating element 30 electrically connects with temperature controller.Temperature sensor 220 can be examined in real time
The temperature surveyed inside heating element 30, if detected value is less than preset value, temperature controller will control heating resistor 32 to heat, most generate heat at last
Temperature control inside device 30 is within the scope of the required temperature of setting.
Preferred embodiment of the present utility model is these are only, is not limited to the utility model, for this area
Technical staff for, the utility model can have various modifications and variations.It is all within the spirit and principles of the utility model,
Any modification, equivalent substitution and improvements made etc., should be included within the scope of protection of the utility model.
Claims (10)
1. a kind of acoustical testing device, it is characterised in that including testing tube, acoustical generator, microphone, heating element and the first radiating
Part；
The testing tube is internally formed closed cavity；
The acoustical generator and the heating element are located at the both ends of testing tube respectively, and the acoustical generator is located in the closed cavity,
The microphone is extended in the closed cavity, and the microphone is close to the acoustical generator；
First radiating piece is sheathed on the outside of the testing tube, and first radiating piece is included along the axial direction of the testing tube
The heat shield of distribution and at least two fin, adjacent two fin are separated by the heat shield.
2. acoustical testing device according to claim 1, it is characterised in that the first depressed part is formed on the testing tube,
First radiating piece is at first depressed part；
First depressed part has relative the first wall and the second wall, and the both ends of first radiating piece are respectively with described first
Wall and the contact of the second wall.
3. acoustical testing device according to claim 2, it is characterised in that the testing tube includes the first body and second
Body, first body are detachably connected with second body, first tubular body and second tubular body
Connection；
First depressed part is formed between first body and second body.
4. acoustical testing device according to claim 2, it is characterised in that first wall and second wall are ring
Shape.
5. acoustical testing device according to claim 1, it is characterised in that the acoustical testing device also includes second and dissipated
Warmware, second radiating piece are sheathed on the outside of the testing tube；
Second radiating piece is provided with inlet and liquid outlet, and second radiating piece is internally formed accommodating chamber, the feed liquor
Mouth and the liquid outlet connect with the accommodating chamber.
6. acoustical testing device according to claim 5, it is characterised in that the accommodating chamber is annular, the accommodating chamber
It is surrounded on the outside of the testing tube.
7. acoustical testing device according to claim 5, it is characterised in that the second depressed part is formed on the testing tube,
Second radiating piece is at second depressed part；
Second depressed part has relative the 3rd wall and the 4th wall, and the both ends of second radiating piece are respectively with the described 3rd
Wall and the contact of the 4th wall.
8. acoustical testing device according to claim 7, it is characterised in that the testing tube includes the 3rd body and the 4th
Body, the 3rd body are detachably connected with the 4th body, the 3rd tubular body and the 4th tubular body
Connection；
Second depressed part is formed between 3rd body and the 4th body.
9. acoustical testing device according to claim 7, it is characterised in that the 3rd wall and the 4th wall are ring
Shape.
10. a kind of acoustical testing device, it is characterised in that including described in controller, temperature sensor and claim any one of 1-9
Acoustical testing device, be provided with heating resistor inside the heating element, the heating resistor electrically connects with the controller, described
Temperature sensor is used to detect the temperature inside the heating element, and the temperature sensor electrically connects with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720854556.6U CN206892035U (en) | 2017-07-14 | 2017-07-14 | A kind of acoustical testing device and acoustical testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720854556.6U CN206892035U (en) | 2017-07-14 | 2017-07-14 | A kind of acoustical testing device and acoustical testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206892035U true CN206892035U (en) | 2018-01-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501427A (en) * | 2019-09-26 | 2019-11-26 | 西北工业大学 | A kind of portable unit and measurement method based on short sound pipe impulse method measurement material acoustic absorptivity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501427A (en) * | 2019-09-26 | 2019-11-26 | 西北工业大学 | A kind of portable unit and measurement method based on short sound pipe impulse method measurement material acoustic absorptivity |
| CN110501427B (en) * | 2019-09-26 | 2021-12-28 | 西北工业大学 | Portable device and method for measuring sound absorption coefficient of material based on short sound tube pulse method |
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