CN204694345U - A kind of ultrasonic power measuring device - Google Patents
A kind of ultrasonic power measuring device Download PDFInfo
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- CN204694345U CN204694345U CN201520428945.3U CN201520428945U CN204694345U CN 204694345 U CN204694345 U CN 204694345U CN 201520428945 U CN201520428945 U CN 201520428945U CN 204694345 U CN204694345 U CN 204694345U
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Abstract
The utility model provides a kind of ultrasonic power measuring device, be applied to sound power measurement field, comprise one for the controller carrying out acoustical power calculating, also comprise for the continuous ultrasonic signal of input being converted to the piezoelectric patches of piezoelectric signal and being used for the fixed mount of fixing continuous ultrasonic signal input apparatus and piezoelectric patches, described piezoelectric patches is arranged on described fixed mount, described piezoelectric patches is connected to described controller, and wherein, described piezoelectric patches is PZT-5 piezoelectric.The utility model is by selecting the good PZT-5 piezoelectric of comparatively piezoelectricity conversion effect, so that output ultrasonic wave signal is converted to piezoelectric signal, and in conjunction with the maximum voltage value that piezoelectric signal exports, then passing ratio converts the sound power value obtained measured by the utility model.The utility model compares other acoustical power detection meanss existing, reflective sound wave can be avoided sound field to be disturbed to the metrical error caused, improve degree of accuracy, and this detection technique is simple to operate, and repeatability is strong.
Description
Technical field
The utility model relates to the fields of measurement of mechanical vibration, mainly refers to measurement ultrasonic signal being carried out to correlation parameter, more specifically, especially relates to a kind of ultrasonic power measuring device.
Background technology
Hyperacoustic sound power measurement determines range of application and the application mode of ultrasonic transducer to a great extent, and as one of hyperacoustic most important index, the measurement of hyperacoustic acoustical power also can come to realize fast by corresponding measuring equipment.
Present sound power measurement mainly adopts ultrasonic radiation force method to detect, for this reason, need the target that placement one piece is larger than ultrasound wave bore in hyperacoustic transmission direction, use microbalance to detect radiation pressure size that the sound wave of ultrasonic transducer produces in target and determine hyperacoustic power, the mode of carrying out detecting based on this principle has two kinds, absorbing target mode and reflecting target mode.The target material of absorbing target mode is ultrasonic strong absorbing material, it measures the acoustical power absorbing the radiant force determination transducer that ultrasound wave produces by microbalance, the acoustical power that transducer itself is launched not only is decided by owing to absorbing the radiant force produced, also the absorption coefficient of target is decided by, and the absorption coefficient of target material is difficult to control at present, it is with environment and time variations, and not only accuracy is not high for the acoustical power measured of this mode, and numerical value is also unstable.Because the reflection coefficient specific absorptivity of material easily controls, also relatively stable, the maximum detection mode of current use is reflecting target mode, because the ultrasonic reflections incided on target can be returned ultrasonic transducer by reflecting target mode, the ultrasonic acoustic power that transducer is launched changes, it is no longer the acoustical power in free space radiation, therefore by the accuracy of impact measurement, for this reason, people make plane reflection target into pointed cone target, reflection wave is laterally propagated, thus the ultrasound wave avoiding interference transducer is launched, but, the radiant force produced due to reflection supersonic wave is relevant with reflection angle, this measurement requires that ultrasound wave is along axisymmetrical, and the acoustic axis of transducer must overlap with the cone axis of target when using, because the sound field symmetry of general transducer can not ensure, this mode not only measuring method is complicated, and, measurement accuracy is not high yet.
Generally, existing sound power measurement equipment or product, it all also exists larger error or deficiency in the method measuring acoustical power, how to improve existing sound power measurement method or measuring equipment and makes it have higher degree of accuracy and just become the art personnel problem demanding prompt solution.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of ultrasonic power measuring device, causes the inaccurate problem of sound power measurement result for solving in existing continuous ultrasonic sound power measurement due to echo interference.
For achieving the above object and other relevant objects, the utility model provides following solution:
A kind of ultrasonic power measuring device, comprise one for the controller carrying out acoustical power calculating, also comprise for the continuous ultrasonic signal of input being converted to the piezoelectric patches of piezoelectric signal and being used for the fixed mount of fixing continuous ultrasonic signal input apparatus and piezoelectric patches, described piezoelectric patches is arranged on described fixed mount, described piezoelectric patches is connected to described controller, wherein, described piezoelectric patches is PZT-5 piezoelectric.
Preferably, for the described piezoelectric patches of PZT-5 piezoelectric is made up of piezoelectric ceramics square column, polymkeric substance and upper/lower electrode, wherein, the arrangement of piezoelectric ceramics square column in the polymer, the height of piezoelectric ceramics square column and the ratio of the square length of side are greater than 3, and piezoelectric ceramics square column accounts for the 40%-80% of total whole piezoelectric patches volume.
Preferably, described piezoelectric patches is circular, and the diameter length of described piezoelectric patches is the wavelength of 2-5 described continuous ultrasonic signal.
Preferably, described fixed mount at least comprises a pole, multiple geometrical clamp and laser beam emitting device, and described multiple geometrical clamp is connected on described pole successively, and described laser beam emitting device is arranged at the below of described multiple geometrical clamp.
Preferably, an amplification circuit module is set between piezoelectric patches and controller.
Preferably, also comprise one for showing the display of result of calculation, described display is connected to described controller.
As mentioned above, of the present utility model have following beneficial effect: the utility model is by selecting the good PZT-5 piezoelectric of comparatively piezoelectricity conversion effect, so that output ultrasonic wave signal is converted to piezoelectric signal, and in conjunction with the maximum voltage value that piezoelectric signal exports, then passing ratio converts the sound power value obtained measured by the utility model.The utility model compares other acoustical power detection meanss existing, reflective sound wave can be avoided sound field to be disturbed to the metrical error caused, improve degree of accuracy, and this detection technique is simple to operate, and repeatability is strong.
Accompanying drawing explanation
The principle schematic of a kind of ultrasonic power measuring device that Fig. 1 provides for the utility model.
Drawing reference numeral explanation
1 fixed mount
11 poles
12 geometrical clamps
13 laser beam emitting devices
2 piezoelectric patches
3 controllers
Embodiment
Below by way of specific instantiation, embodiment of the present utility model is described, those skilled in the art the content disclosed by this instructions can understand other advantages of the present utility model and effect easily.The utility model can also be implemented or be applied by embodiments different in addition, and the every details in this instructions also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present utility model.It should be noted that, when not conflicting, the feature in following examples and embodiment can combine mutually.
It should be noted that, the diagram provided in following examples only illustrates basic conception of the present utility model in a schematic way, then only the assembly relevant with the utility model is shown in graphic but not component count, shape and size when implementing according to reality is drawn, it is actual when implementing, and the kenel of each assembly, quantity and ratio can be a kind of change arbitrarily, and its assembly layout kenel also may be more complicated.
Except mentioned in the introduction, outside deficiency existing on existing ultrasonic acoustic power detecting method, those skilled in the art also attempt to overcome deficiency of the prior art by new measurement scheme.Particularly, in a lot of Ultrasonic Detection instrument, the piezoelectric properties of material are all adopted to detect hyperacoustic intensity, as B ultrasonic, its benefit is the electric signal of direct-detection piezoelectric, avoid balance and detect the problem brought, for this reason, some people using piezoelectric as detection target, wish the acoustical power by detecting the voltage determination transducer reflection that piezoelectric both sides produce, but because piezoelectric is all generally strong reflection material, experiment proves, the method can be used for the very short acoustical power of transponder pulse and detects, as B ultrasonic, but the Measurement accuracy to continuous ultrasonic signal cannot be realized, if use existing method or device to carry out the acoustical power of continuous ultrasonic signal, the error of itself and actual value is larger.This is that it inevitably receives the interference of reflection echo due to the hyperacoustic transducer of sequential filming, thus affects the detection of ultrasonic power, this be existing method or device always the unsuccessful continuous ultrasound transducer acoustical power that must be used for detect reason.
Refer to Fig. 1, show the principle schematic of a kind of ultrasonic power measuring device that the utility model provides, as shown in the figure, this ultrasonic power measuring device comprises a confession and carries out the controller 3 of acoustical power calculating, the fixed mount 1 for the fixing continuous ultrasonic signal input apparatus of piezoelectric patches 2 and the confession continuous ultrasonic signal of input being converted to piezoelectric signal and piezoelectric patches 2, described piezoelectric patches 2 is arranged on fixed mount 1, described piezoelectric patches 2 is connected to described controller 3, wherein, described piezoelectric patches 2 is PZT-5 piezoelectric.
The ultrasonic power measuring device provided by the utility model can be measured continuous ultrasonic signal well, its principle is that ultrasound wave is the sound wave propagated with certain speed, the impact of reflection wave on continuous ultrasonic signal input apparatus (such as transducer) that the piezoelectric patches 2 detected produces not is instantaneous, but has a time delay.Be exactly simply, the continuous ultrasonic signal that continuous ultrasonic signal input apparatus is launched is through after a period of time, just getting on piezoelectric patches 2 and to produce piezoelectric signal, because the response time of piezoelectric patches 2 is very fast, the amplitude of this piezoelectric signal rises to maximal value very soon; After piezoelectric patches 2 receives continuous ultrasonic signal, reflective sound wave will be produced, before reflective sound wave reaches continuous ultrasonic signal input apparatus, its emissive power can not change, the continuous ultrasonic signal exported is during this period of time stable, and it is constant that the piezoelectric signal amplitude that it produces on piezoelectric patches 2 can maintain a period of time; At this moment the amplitude of piezoelectric signal has reacted the acoustical power (acoustical power to free space radiation) of ultrasonic transducer radiation accurately.But, when the reflective sound wave of piezoelectric patches 2 is to continuous ultrasonic signal input apparatus, a power will be applied to continuous ultrasonic signal input apparatus, under this power effect, the emissive power of continuous ultrasonic signal input apparatus will reduce (acoustical power of free space radiation), when this continuous ultrasonic Signal transmissions is to piezoelectric patches 2, the piezoelectric signal amplitude of generation will reduce.Therefore, the maximal value of piezoelectric signal amplitude can be found according to the principle of searching maximal value, and and then calculate corresponding sound power value according to the method for existing calculating acoustical power.Therefore, be understandable that, the controller 3 for calculating acoustical power can adopt existing miniature control chip, and such as single-chip microcomputer realizes.This chip is only needed to be connected on piezoelectric patches 2 for those skilled in the art.
Further, PZT-5 piezoelectric receive ultrasonic longitudinal wave time, except excited thickness vibration except, also can excite stronger transverse vibration, have lost part energy, greatly reduce the efficiency that ultrasound wave converts electric energy to.Usually, what described piezoelectric patches 2 was selected is the cylindrical structural be made up of PZT-5 piezoelectric, and hyperacoustic wavelength that the diameter of this cylindrical piezoelectric sheet 2 exports for 2-5 described sound wave output unit, the dress being more conducive to electric energy changes.
In further detail, composition graphs 1 again, described fixed mount 1 at least comprises a pole 11, multiple geometrical clamp 12 and laser beam emitting device 13, and described multiple geometrical clamp 12 is connected on described pole 11 successively, and described laser beam emitting device 13 is arranged at the below of described multiple geometrical clamp 12.The plurality of geometrical clamp 12 is used for fixing piezoelectric patches 2 and continuous ultrasonic signal input apparatus respectively, and the object arranging this laser beam emitting device 13 is, whether the ultrasound wave delivery outlet being corrected continuous ultrasonic signal input apparatus by Emission Lasers is vertical just to placement with piezoelectric patches 2, to ensure that piezoelectric patches 2 pairs of continuous ultrasonic signals have all good conversion ratio, thus reduce measuring error.
Further, the piezoelectric signal produced due to piezoelectric patches 2 is very faint, therefore more preferably an amplification circuit module (do not give in figure and illustrating) can also be set between piezoelectric patches 2 and controller 3, usually, this amplification circuit module can adopt voltage amplifier circuit chip of the prior art, and the chip signal specifically selected can be selected as the case may be.
More preferably, also a display can being set, connecting described controller 3, for showing result of calculation.
In sum, the utility model is by selecting the good PZT-5 piezoelectric of comparatively piezoelectricity conversion effect, so that output ultrasonic wave signal is converted to piezoelectric signal, and in conjunction with the maximum voltage value that piezoelectric signal exports, then passing ratio converts the sound power value obtained measured by the utility model.The utility model compares other acoustical power detection meanss existing, reflective sound wave can be avoided sound field to be disturbed to the metrical error caused, improve degree of accuracy, and this detection technique is simple to operate, and repeatability is strong.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all without prejudice under spirit of the present utility model and category, can modify above-described embodiment or changes.Therefore, such as have in art and usually know that the knowledgeable modifies or changes not departing from all equivalences completed under the spirit and technological thought that the utility model discloses, must be contained by claim of the present utility model.
Claims (5)
1. a ultrasonic power measuring device, it is characterized in that, comprise one for carry out acoustical power calculating controller, for the continuous ultrasonic signal of input being converted to the piezoelectric patches of piezoelectric signal and being used for the fixed mount of fixing continuous ultrasonic signal input apparatus and piezoelectric patches, described piezoelectric patches is arranged on described fixed mount, described piezoelectric patches is connected to described controller, wherein, described piezoelectric patches is PZT-5 piezoelectric.
2. ultrasonic power measuring device according to claim 1, is characterized in that, described piezoelectric patches is circular, and the diameter length of described piezoelectric patches is the wavelength of 2-5 described continuous ultrasonic signal.
3. ultrasonic power measuring device according to claim 1, it is characterized in that, described fixed mount comprises a pole, multiple geometrical clamp and laser beam emitting device, and described multiple geometrical clamp is connected on described pole successively, and described laser beam emitting device is arranged at the below of described multiple geometrical clamp.
4. ultrasonic power measuring device according to claim 1, is characterized in that, arranges an amplification circuit module between piezoelectric patches and controller.
5. ultrasonic power measuring device according to claim 1, is characterized in that, also comprise one for showing the display of result of calculation, described display is connected to described controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520428945.3U CN204694345U (en) | 2015-06-19 | 2015-06-19 | A kind of ultrasonic power measuring device |
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| CN201520428945.3U CN204694345U (en) | 2015-06-19 | 2015-06-19 | A kind of ultrasonic power measuring device |
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| CN204694345U true CN204694345U (en) | 2015-10-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806466A (en) * | 2016-03-22 | 2016-07-27 | 华中科技大学 | Ultrasonic power measurement system |
| CN107561157A (en) * | 2016-06-30 | 2018-01-09 | 重庆医科大学 | Water quality testing meter and its method |
| CN113704970A (en) * | 2021-07-27 | 2021-11-26 | 重庆医科大学 | Method, device and equipment for measuring acoustic power by using piezoelectric array |
| CN114354761A (en) * | 2022-01-11 | 2022-04-15 | 重庆医科大学 | Device and method for measuring loss of acoustic waveguide |
-
2015
- 2015-06-19 CN CN201520428945.3U patent/CN204694345U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806466A (en) * | 2016-03-22 | 2016-07-27 | 华中科技大学 | Ultrasonic power measurement system |
| CN105806466B (en) * | 2016-03-22 | 2018-11-06 | 华中科技大学 | A kind of ultrasonic power measuring system |
| CN107561157A (en) * | 2016-06-30 | 2018-01-09 | 重庆医科大学 | Water quality testing meter and its method |
| CN107561157B (en) * | 2016-06-30 | 2023-08-04 | 重庆医科大学 | Water quality detector and method thereof |
| CN113704970A (en) * | 2021-07-27 | 2021-11-26 | 重庆医科大学 | Method, device and equipment for measuring acoustic power by using piezoelectric array |
| CN113704970B (en) * | 2021-07-27 | 2023-07-21 | 重庆医科大学 | Method, device and equipment for measuring acoustic power by using piezoelectric array |
| CN114354761A (en) * | 2022-01-11 | 2022-04-15 | 重庆医科大学 | Device and method for measuring loss of acoustic waveguide |
| CN114354761B (en) * | 2022-01-11 | 2024-01-12 | 重庆医科大学 | Device and method for measuring loss of acoustic waveguide tube |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20160619 |