CN203356029U - Simple ultrasonic sensor without adapter plate - Google Patents
Simple ultrasonic sensor without adapter plate Download PDFInfo
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- CN203356029U CN203356029U CN 201320303408 CN201320303408U CN203356029U CN 203356029 U CN203356029 U CN 203356029U CN 201320303408 CN201320303408 CN 201320303408 CN 201320303408 U CN201320303408 U CN 201320303408U CN 203356029 U CN203356029 U CN 203356029U
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- outer casing
- cylindrical outer
- ultrasonic sensor
- signal output
- piezoelectric element
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Abstract
The utility model relates to an ultrasonic sensor, in particular to a simple ultrasonic sensor without an adapter plate. In order to solve the problems in the prior art, the utility model provides the simple ultrasonic sensor without the adapter plate. The adapter plate inside the ultrasonic sensor is eliminated, the problems caused by secondary switchover are solved, and furthermore, a foaming adhesive layer is utilized to replace a second sealing adhesive layer and a sound absorption cotton layer to achieve the effect of reducing interference in ultrasonic signals. The simple ultrasonic sensor comprises a barrel-shaped outer shell, a piezoelectric element, a signal output positive wire, a signal output negative wire, a first sealing adhesive layer and the foaming adhesive layer. The bottom end face of the internal bottom of the barrel-shaped outer shell adheres to one end face of the piezoelectric element, one end of the signal output positive wire is welded with the other end face of the piezoelectric element, one end of the signal output negative wire is welded with the side wall inside the barrel-shaped outer shell, and the foaming adhesive layer covers the other end face of the piezoelectric element and the bottom end face inside the barrel-shaped outer shell. The simple ultrasonic sensor is applied to the field of ultrasonic sensors.
Description
Technical field
The utility model relates to ultrasonic sensor, especially a kind of simple type ultrasonic sensor of cancelling keyset
.
Background technology
Ultrasonic sensor is the sensor that utilizes hyperacoustic characteristic to develop.Ultrasonic wave is the mechanical wave of a kind of vibration frequency higher than sound wave, and generation of vibration is occurred under the excitation of voltage by the transducing wafer, and it has, and frequency is high, wavelength is short, the diffraction phenomenon is little, particularly good directionality, can become ray and the characteristics such as direction propagation.Ultrasonic wave is very large to the penetrating power of liquid, solid, especially in the opaque solid of sunlight, and its degree of depth of penetrable tens meters.Ultrasonic wave is encountered impurity or interface and can be produced significantly to reflect to form and be reflected into echo, encounters the live animal physical efficiency and produces Doppler effect.Therefore ultrasound examination is widely used in the aspects such as industry, national defence, biomedicine.
Ultrasonic sensor is measured basic principle: the ultrasonic pulsative signal sent by ultrasonic probe, in gas, propagate, be reflected after running into the interface of air and liquid, calculate the round propagation time of its ultrasonic wave after receiving echo-signal, can converse distance or liquid level.Ultrasonic wave measuring method has a lot of incomparable advantages of other method: (1) is without any mechanical transmission component, do not contact fluid to be measured yet, belong to non-contact measurement, be not afraid of electromagnetic interference, be not afraid of strongly corrosion liquids such as soda acid etc., so stable performance, reliability is high, the life-span is long; (2) short can the realization easily without the real-time measurement lagged behind of its response time.
Yet ultrasonic sensor of the prior art as shown in Figure 1, such ultrasonic sensor comprises the cylindrical outer casing 1 and piezoelectric element 2 with bottom, wherein piezoelectric element 2 one end faces are attached to the inboard of this cylindrical outer casing 1 bottom, make the bottom of this cylindrical outer casing 1 have the function of vibration surface.The first sealant layer 5 is filled in the recess that the sidewall of keyset 8 and cylindrical outer casing 1 forms.Acoustical cotton layer 6 is arranged between keyset 8 and piezoelectric element 2.Keyset 8 two ends are fixing by the second sealant layer 7.Signal output cathode line 3 is communicated with positive lead 9 one ends, negative lead 10 1 ends by the switching of keyset 8 is corresponding respectively with signal output negative pole line 4.Positive lead 9 other ends and piezoelectric element 2 other end welding, conductor wire 10 other ends are connected with the inner surface of cylindrical outer casing 1.When on piezoelectric element 2, applying voltage, piezoelectric element 2 radially with axial vibration, cause the surface vibration of cylindrical outer casing 1, thereby launch ultrasonic wave in air.Ultrasonic sensor, in vibration processes, easily causes positive lead 9 fractures that are connected with piezoelectric element 2, causes product not work.Simultaneously due to output signal by the switching of circuit board secondary, complex process, and, than being easier to occur rosin joint, cause product discontinuity not work.The acoustical cotton layer can not well be eliminated the interference ultrasonic signal of ultrasonic sensor generation and can not well eliminate the aftershock signal that piezoelectric element produces.
The utility model content
Technical problem to be solved in the utility model is: for above-mentioned problems of the prior art, a kind of simple type ultrasonic sensor of cancelling keyset is provided, by the keyset by ultrasonic sensor inside and the second sealant layer, remove, directly signal output cathode line one end, signal output negative pole line one end are connected with piezoelectric element, cylindrical outer casing madial wall respectively, reduce the problem that the secondary switching brings; Further by foaming glue-line replacement acoustical cotton layer, solved the problem that the acoustical cotton layer can not significantly reduce the interference ultrasonic signal of ultrasonic sensor generation and well eliminate the aftershock signal of piezoelectric element generation.
the technical solution adopted in the utility model is as follows:
A kind of simple type ultrasonic sensor of cancelling keyset comprises cylindrical outer casing, piezoelectric element, signal output cathode line, signal output negative pole line, the first sealant layer, the sound-absorbing element layer, described cylindrical outer casing inner sealing one end is the cylindrical outer casing bottom face, be provided with boss in described cylindrical outer casing bottom face inwall, described cylindrical outer casing bottom face boss and piezoelectric element one end face are bonding, signal output cathode line one end and the welding of piezoelectric element other end, described signal output negative pole line one end and cylindrical outer casing 1 internal side wall welding, described sound-absorbing element layer lower surface covers the piezoelectric element other end, cylindrical outer casing inner bottom end face and cylindrical outer casing inwall, the Baltimore groove that described the first sealant layer sealing sound-absorbing element layer upper surface and cylindrical outer casing inwall form, the pad of described signal output negative pole line and cylindrical outer casing is on inwall between sound-absorbing element layer and cylindrical outer casing upper surface.
Described sound-absorbing element layer is foaming glue-line or acoustical cotton layer.
Described sound-absorbing element layer is 1.5mm～4mm along cylindrical outer casing axial height scope.
Described sound-absorbing element layer is 1.5mm along the cylindrical outer casing axial height.
Described sound-absorbing element layer is 4mm along the cylindrical outer casing axial height.
Described sound-absorbing element layer is 3mm along the cylindrical outer casing axial height.
Described foaming glue-line is comprised of foamed silica gel
.
In sum, owing to having adopted technique scheme, the beneficial effects of the utility model are:
1) the utility model removes keyset and second sealant layer of ultrasonic sensor inside in prior art, but directly signal output cathode end one end, signal output negative pole line one end are connected with piezoelectric element, cylindrical outer casing madial wall respectively, reduce the problem that the secondary switching brings, reduce technological process.
2) the utility model replaces the acoustical cotton layer by the foaming glue-line, has reached the interference ultrasonic signal that obvious minimizing ultrasonic wave is drawn signal output negative pole line, signal output cathode line one end, and good directionality is arranged.And can eliminate the aftershock signal that piezoelectric element produces simultaneously.
The accompanying drawing explanation
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the ultrasonic sensor track detection principle of prior art.
Fig. 2 is example structure figure of the utility model.
Reference numeral
1-cylindrical outer casing 2-piezoelectric element
3-signal output cathode line 4-signal output negative pole line
5-the first sealant layer 6-acoustical cotton layer
7-the second sealant layer 8-keyset
9-positive lead 10-negative lead
11-sound-absorbing element layer
The specific embodiment
Disclosed all features in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing), unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is,, unless special narration, each feature is an example in a series of equivalences or similar characteristics.
The utility model related description:
1, described the first sealant layer is different from the hardness of the second sealant layer, and close hardness ratio the second sealant layer hardness of described the first sealant layer is high, and the first sealant layer, the second sealant layer are silica gel.
2, the effect of keyset, just by signal output cathode line and positive lead UNICOM, is communicated with signal output negative pole line with negative lead.
3, cylindrical outer casing inner bottom bottom face and piezoelectric element one end face are bonding by viscose glue, and described viscose glue has electric conductivity.
4, described signal output cathode line, signal output negative pole line are connected with other circuit by two extraction electrodes.
5, the piezoelectric element effect is: utilize the principle of piezo-electric effect that electric energy and ultrasonic wave are transformed mutually.
6, fluid sealant is silica gel.
7, the bonding end face of piezoelectric element and cylindrical outer casing bottom face boss is the piezoelectric element negative pole.Piezoelectric element is that piezoelectric element is anodal away from cylindrical outer casing bottom face and the end face that is attracted element sealing.
8, cylindrical outer casing is metal material.
9, the first sealant layer is filled and is formed by the first fluid sealant, the second sealant layer is filled and is formed by the second fluid sealant, described the first fluid sealant, the second fluid sealant are exactly that hardness different sealing glue forms, and the hardness of the first fluid sealant is greater than the hardness of the second fluid sealant.The acoustical cotton layer is formed by acoustical cotton, and the sound-absorbing element layer is filled and formed or formed by acoustical cotton by foamed glue, and the foaming glue-line is to be filled and formed by foamed glue.
Embodiment mono-: as shown in Figure 2, a kind of simple type ultrasonic sensor of cancelling keyset comprises cylindrical outer casing, piezoelectric element, signal output cathode line, signal output negative pole line, the first sealant layer, the sound-absorbing element layer, described cylindrical outer casing is an end opening, the hollow circuit cylinder cavity of other end sealing, described cylindrical outer casing inner sealing one end is the cylindrical outer casing bottom face, be provided with boss in described cylindrical outer casing bottom face inwall, described cylindrical outer casing bottom face boss and piezoelectric element one end face are bonding, signal output cathode line one end and the welding of piezoelectric element other end, described signal output negative pole line one end and the welding of cylindrical outer casing internal side wall, described sound-absorbing element layer covers piezoelectric element other end and cylindrical outer casing inner bottom end face, the Baltimore groove that described sealant sealing sound-absorbing element layer and cylindrical outer casing form, the pad of described signal output negative pole line 4 and cylindrical outer casing 1 is on sidewall between sound-absorbing element layer and cylindrical outer casing upper surface.
Embodiment bis-: on embodiment mono-basis, the sound-absorbing element layer is foaming glue-line or acoustical cotton layer.
Embodiment tri-: on embodiment bis-bases, described sound-absorbing element layer is 1.5mm-4mm along cylindrical outer casing 1 axial height scope.
Embodiment tetra-: on embodiment bis-or three bases, described sound-absorbing element layer is 1.5mm along cylindrical outer casing 1 axial height.The now elimination of directionality the contrary reverse echo-signal in cylindrical outer casing bottom.
Embodiment five: on one of embodiment bis-to four basis, described sound-absorbing element layer is 4mm along cylindrical outer casing 1 axial height, the now elimination of directionality the contrary reverse echo-signal in cylindrical outer casing bottom.
Embodiment six: on one of embodiment bis-to five basis, described sound-absorbing element layer is 3mm along cylindrical outer casing 1 axial height, the now elimination of directionality the contrary reverse echo-signal in cylindrical outer casing bottom.
Embodiment seven: on one of embodiment bis-to six basis, described foaming glue-line is comprised of foamed silica gel.
The utility model is not limited to the aforesaid specific embodiment.The utility model expands to any new feature or any new combination disclosed in this manual, and the arbitrary new method disclosed or step or any new combination of process.
Claims (7)
1. a simple type ultrasonic sensor of cancelling keyset, it is characterized in that comprising cylindrical outer casing, piezoelectric element, signal output cathode line, signal output negative pole line, the first sealant layer, the sound-absorbing element layer, described cylindrical outer casing inner sealing one end is the cylindrical outer casing bottom face, be provided with boss in described cylindrical outer casing bottom face inwall, described cylindrical outer casing bottom face boss and piezoelectric element one end face are bonding, signal output cathode line one end and the welding of piezoelectric element other end, described signal output negative pole line one end and cylindrical outer casing 1 internal side wall welding, described sound-absorbing element layer lower surface covers the piezoelectric element other end, cylindrical outer casing inner bottom end face and cylindrical outer casing inwall, the Baltimore groove that described the first sealant layer sealing sound-absorbing element layer upper surface and cylindrical outer casing inwall form, the pad of described signal output negative pole line and cylindrical outer casing is on inwall between sound-absorbing element layer and cylindrical outer casing upper surface.
2. a kind of simple type ultrasonic sensor of cancelling keyset according to claim 1, is characterized in that described sound-absorbing element layer is foaming glue-line or acoustical cotton layer.
3. a kind of simple type ultrasonic sensor of cancelling keyset according to claim 2, is characterized in that described sound-absorbing element layer is 1.5mm～4mm along cylindrical outer casing axial height scope.
4. a kind of simple type ultrasonic sensor of cancelling keyset according to claim 3, is characterized in that described sound-absorbing element layer is 1.5mm along the cylindrical outer casing axial height.
5. a kind of simple type ultrasonic sensor of cancelling keyset according to claim 3, is characterized in that described sound-absorbing element layer is 4mm along the cylindrical outer casing axial height.
6. a kind of simple type ultrasonic sensor of cancelling keyset according to claim 3, is characterized in that described sound-absorbing element layer is 3mm along the cylindrical outer casing axial height.
7. according to the described a kind of simple type ultrasonic sensor of cancelling keyset of one of claim 2 to 6, it is characterized in that described foaming glue-line is that foamed silica gel forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320303408 CN203356029U (en) | 2013-05-30 | 2013-05-30 | Simple ultrasonic sensor without adapter plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320303408 CN203356029U (en) | 2013-05-30 | 2013-05-30 | Simple ultrasonic sensor without adapter plate |
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| Publication Number | Publication Date |
|---|---|
| CN203356029U true CN203356029U (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320303408 Expired - Lifetime CN203356029U (en) | 2013-05-30 | 2013-05-30 | Simple ultrasonic sensor without adapter plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241505A (en) * | 2015-10-16 | 2016-01-13 | 中国科学院苏州生物医学工程技术研究所 | Pressure and flow velocity multi-parameter measuring device and method based on a single Lamb wave device |
-
2013
- 2013-05-30 CN CN 201320303408 patent/CN203356029U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241505A (en) * | 2015-10-16 | 2016-01-13 | 中国科学院苏州生物医学工程技术研究所 | Pressure and flow velocity multi-parameter measuring device and method based on a single Lamb wave device |
| CN105241505B (en) * | 2015-10-16 | 2017-03-22 | 中国科学院苏州生物医学工程技术研究所 | Pressure and flow velocity multi-parameter measuring device and method based on a single Lamb wave device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131225 |