CN205643384U - Ultrasonic sensor that can be self -heating - Google Patents
Ultrasonic sensor that can be self -heating Download PDFInfo
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- CN205643384U CN205643384U CN201620176846.5U CN201620176846U CN205643384U CN 205643384 U CN205643384 U CN 205643384U CN 201620176846 U CN201620176846 U CN 201620176846U CN 205643384 U CN205643384 U CN 205643384U
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Abstract
The utility model relates to a can self -heating ultrasonic sensor, it includes casing and cable, the cable includes first connecting wire, second connecting wire, third connecting wire and fourth connecting wire, one end tip in the casing is equipped with the sound matching layer, be equipped with the ceramic circuit basement on the sound matching layer, be equipped with the piezoceramics piece in the ceramic circuit basement, the ceramic circuit basement is connected with second, three, four connecting wires electricity, and the piezoceramics piece is connected with first connecting wire electricity, piezoceramics piece, first connecting wire, ceramic circuit basement, second, three, four connecting wires and sound matching layer pass through sound decay body pressure and tightly install in the casing. The utility model discloses a put into heating power supply in the sensor, the deposit that moral integrity fog etc. Formed has been avoided at the sensor terminal surface to the effectual temperature uniformity of sensor under extreme condition application condition that has ensured to higher measurement accuracy has been guaranteed. The simple compactness of sensor structure, convenient to use, safe and reliable.
Description
Technical field
This utility model relates to a kind of sensor, a kind of can the ultrasonic sensor of self-heating, the fields such as ultrasonic wind velocity indicator can be used in.
Background technology
Ultrasonic sensor is generally made up of metal shell and the piezoelectric ceramic piece being bonded in metal-back, and the excitation of AC signal can make piezoelectric ceramic piece produce the mechanical vibration of same frequency, thus launches ultrasound wave；Or piezoelectric ceramics produces the signal of telecommunication of corresponding frequencies under the outside mechanical vibration of certain frequency, thus as the receptor of ultrasound wave.
This ultrasonic transmission/reception principle is widely used in engineering survey field.Ultrasonic wind velocity indicator is exactly such a kind of measurement apparatus.The built-in ultrasonic sensor of ultrasonic wind velocity indicator is mainly used to measure the transmission range of ultrasound wave, measure utilize be the sound wave propagation time between transmitting probe to receiving transducer can along with the change of air speed value this principle of proportional change.Ultrasonic wind velocity indicator compares traditional mechanical anemometer, and certainty of measurement is higher, uses more reliable.But common ultrasonic sensor is used in anemobiagraph, but owing to various severe natural climate condition cannot be adapted to, and reduce certainty of measurement.The concrete analysis of causes be presented herein below:
The core parts of ultrasonic sensor are a kind of devices (majority is piezoelectric smart material) that the signal of telecommunication and acoustic signal can be carried out and changing.The characteristic such as conversion efficiency that this acoustical-electrical transducer is had and resonant frequency can show difference along with the change of environment temperature.For natural climate condition, owing to the excursion of temperature is big, the acoustical-electrical transducer caused therefrom characteristically change can reduce the certainty of measurement of sensor.In order to ensure that ultrasonic wind velocity indicator receiving terminal and transmitting terminal sensor have identical feature, it is necessary to the operating temperature of sensor keeps constant.But the applied environment of anemobiagraph is often the most severe, at the precipitation that sensor end face is formed, frost, frost etc., on the one hand the operating temperature of sensor is produced impact, thus reduce the certainty of measurement of sensor, on the other hand these surface condensation things, can form new acoustic resistance layer, thus have impact on ultrasonic wind velocity indicator send out the wave transfer characteristic that quiets down；By being built into heater at ultrasonic sensor, and ensure that the temperature of sensor end face is maintained at certain numerical value, it is possible to effectively avoid frost, precipitation, frost etc. to form sedimentary at sensor end face.
Current ultrasonic sensor many employings piezoelectric is as acoustical-electrical transducer, and by using λ/4 matching material layer, reduces the sound wave matching loss at piezoelectric Yu Air Interface.The acoustic resistance of matching materials generally takes air and the meansigma methods of piezoelectric acoustic resistance.Owing to matching material layer directly contacts with air, therefore should directly contact with heater, and there is preferable heat conductivility.
Fig. 1 is the structural representation of existing ultrasonic sensor, and wherein, 1 represents piezoelectric ceramic piece, and 2 is metal-back, and 3 is sound attenuating body, and 4 is fixing support ring, and 5 is Sound Match layer, and 6 is the first connecting line, and 7 is the second connecting line, and 10 is cable.The ultrasonic sensor (Fig. 1) that this method makes, internal without heater, when being used in severe natural environment, the end face (sensor emission end face) of Sound Match layer (5) is easily generated the deposits such as frost, thus affect the use of sensor, and be unsuitable for being integrated in anemobiagraph and carry out high-precision measuring wind speed.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of can the sonac of self-heating, it is simple and compact for structure, easy to install, and certainty of measurement is high, and service life is long, and use cost is low, applied widely, safe and reliable.
According to this utility model provide technical scheme, described can self-heating ultrasonic sensor, including housing and cable, described cable includes the first connecting line, the second connecting line, the 3rd connecting line and the 4th connecting line；End, one end in described housing is provided with Sound Match layer, and described Sound Match layer is provided with ceramic circuit substrate, and ceramic circuit substrate is provided with piezoelectric ceramic piece；Ceramic circuit substrate with second and third, four connecting lines electrically connect, piezoelectric ceramic piece and the first connecting line electrical connection；Piezoelectric ceramic piece, the first connecting line, ceramic circuit substrate, second and third, four connecting lines and Sound Match layer compressed by sound attenuating body and be installed in housing.
Described ceramic circuit substrate includes dielectric-slab and the connection electrode being positioned on dielectric-slab and heating unit.
Described connection electrode is positioned at the dielectric-slab centre of surface position of ceramic circuit substrate, and ring-type in open circles.
Described housing uses metal or plastics to make.
Described housing is provided with support locating ring corresponding to the other end arranging Sound Match layer, and described support locating ring is enclosed within housing.
Described sound attenuating body uses the mixed-powder that foaminess resin, polyurethanes and the mixed-powder of tungsten powder formation or polyurethanes are formed with alumina powder.
Described sound attenuating body is by being mixed polyurethanes or by polyurethanes and aluminium oxide being mixed with the ratio that volume ratio is 1: 1 with the ratio that volume ratio is 3: 1 with tungsten powder.
Described Sound Match layer is mixed with volume ratio 1: 1 by epoxy resin (LY5138) and hollow acrylonitrile bead (EXPANCEL company).
Described piezoelectric ceramic piece is provided with the first lead end of electrical connection, and ceramic circuit substrate is provided with the second lead end of electrical connection；First connecting line is electrically connected with piezoelectric ceramic piece by the first lead end, and the second connecting line is electrically connected with ceramic circuit substrate by the second lead end.
Described connection electrode uses metallic copper to make, and the thickness connecting electrode is 30-65 μm.
Described heating unit, for using resistance slurry, and is made by silk-screen printing technique, and heating unit thickness is 20-40 μm, and it is printed over for high-temperature ceramics based insulating layers, and thickness is 15-25um.
Advantage of the present utility model: be provided with Sound Match layer in housing, described Sound Match layer is provided with ceramic circuit substrate, and ceramic circuit substrate is provided with piezoelectric ceramic piece；The upper surface of ceramic circuit substrate arrange second and third, four lead ends, as three electrodes of sensor；The upper surface of piezoelectric ceramic piece arranges the first lead end the 4th electrode as sensor；Piezoelectric ceramic piece is linked together by high-strength viscose with ceramic circuit substrate, and is fixed in housing by sound attenuating body.This utility model uses ceramic circuit formula heating unit, and is placed on piezoelectric ceramic piece and Sound Match interlayer, effectively raises the heat radiation to sensor end face.Owing to heating power supply uses ceramic bases, there is the acoustic resistance characteristic close with piezoelectric ceramic piece, be conducive to the propagation of vibration, thus add the precision of measurement；Additionally sensor construction is the compactest, easy to install, and certainty of measurement is high, and service life is long, applied widely, safe and reliable.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing ultrasonic sensor.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is the planar structure schematic diagram of this utility model Sound Match layer.
Detailed description of the invention
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
As shown in Figure 2 to 3: this utility model includes pressing 1, piezoelectric ceramic piece；2, metal-back；3 sound attenuating bodies；4, fixing support ring；5, Sound Match layer；6, the first connecting line；7, the second connecting line；8, the 3rd connecting line；9, the 4th connecting line；6-1, the first lead end；7-1, the second lead end；8-1, the 3rd lead end；9-1, the 4th lead end；10, cable；11, ceramic circuit substrate.
As shown in Figure 2: described housing 2 cylindrically structure, the two ends in housing 2 are connected.Sound Match layer 5 it is provided with in housing 2, described Sound Match layer 5 is provided with ceramic circuit substrate 11, print in described ceramic circuit substrate 11 and connect electrode and heating unit, described ceramic circuit substrate is arranged over piezoelectric ceramic piece 1, described piezoelectric ceramic piece electrically connects with ceramic circuit substrate 11 and corresponding matching, can obtain the operating frequency of ultrasonic sensor after piezoelectric ceramic piece 1 and Sound Match layer 5 corresponding matching.In order to form two electrodes of ultrasonic sensor, the potsherd upper surface of piezoelectric ceramic piece 1 is provided with the first lead end 6-1, and piezoelectric ceramic piece 1 is electrically connected by the first lead end 6-1 and the first connecting line 6；Meanwhile, ceramic circuit substrate 11 is provided with the second lead end 7-1, the 3rd lead end 8-1, the 4th lead end 9-1, ceramic circuit substrate 11 by second and third, four lead end 7-1,8-1,9-1 respectively with second and third, four connecting lines 7,8,9 electrically connect.Wherein, the connection wire that first connecting line the 6, second connecting line the 7, the 3rd connecting line the 8, the 4th connecting line 9 is in cable 10.First connecting line 6 connects by ultrasonic welding process is fixing with the first lead end 6-1, second and third, four connecting lines 7,8,9 respectively by soldering process with second and third, four lead end 7-1,8-1,9-1 fix and are connected.
In order to Sound Match layer 5, ceramic circuit substrate 11 are installed in housing 2 with piezoelectric ceramic piece 1, being perfused with sound attenuating body 3 in described housing 2, Sound Match layer 5, ceramic circuit substrate 11 are installed in housing 2 by sound attenuating body 3 compression with piezoelectric ceramic piece 1.Housing 2 can be made up of metal or plastics, and the axis of Sound Match layer 5 and piezoelectric ceramic piece 1 is located along the same line with the axis of housing 2, and the end of the end of Sound Match layer 5 and housing 2 is in same level.Housing 2 is provided with support locating ring 4 corresponding to the other end end arranging Sound Match layer 5, and described support locating ring 4 is enclosed within housing 2, and cooperation corresponding with housing 2.The end supporting locating ring 4 covers the opening of housing 2, forms the corresponding polycrystalline substance of ultrasonic sensor.
As shown in Figure 3: described ceramic circuit substrate 11 includes dielectric-slab 11-1, described dielectric-slab 11-1 is provided with piezoelectric ceramic piece and connects electrode 11-5, described dielectric-slab 11-1 is in the form of annular discs, and connecting electrode 11-5 is that open circles is ring-type, connects electrode 11-5 and is connected with connecting line by electrode ports 11-4.Described dielectric-slab 11-1 is provided with heating unit 11-6, and heating unit is bending and is connected with electrode ports 11-2,11-3.Connecting electrode 11-2,11-3,11-4,11-5 to be all made of copper, heating unit 11-6 is printed on dielectric-slab 11-1 surface for using resistance slurry.In application process, the temperature of heating unit 11-6 is maintained at a stationary temperature, such as 40-80 degree.
Piezoelectric ceramic piece 1 is arranged the surface being connected electrode 11-5 and is bonded together by chemistry viscose glue with dielectric-slab 11-1.Sound Match layer 5 bonds together also by chemistry viscose glue with the another side of dielectric-slab 11-1.Sound attenuating body 3 is filled in housing 2, and the ultrasound wave backward and sent to side being used for producing piezoelectric ceramic piece 1 carries out absorbing suppression.Thus reduce the impact that the ultrasound wave of transmitting terminal is caused by these vibrations.
Claims (2)
1. can the ultrasonic sensor of self-heating, including housing and cable, described cable includes the first connecting line, the second connecting line, the 3rd connecting line and the 4th connecting line；End, one end in described housing is provided with Sound Match layer, and described Sound Match layer is provided with ceramic circuit substrate, and ceramic circuit substrate is provided with piezoelectric ceramic piece；Ceramic circuit substrate with second and third, four connecting lines electrically connect, piezoelectric ceramic piece upper surface and the first connecting line electrical connection；Piezoelectric ceramic piece, the first connecting line, ceramic circuit substrate, second and third, four connecting lines and Sound Match layer compressed by sound attenuating body and be installed in housing.
The most according to claim 1 a kind of can the ultrasonic sensor of self-heating, it is characterized in that: described ceramic circuit substrate (11) includes dielectric-slab (11-1) and the connection electrode (11-2,11-3,11-4,11-5) being positioned on dielectric-slab (11-1) and heating unit (11-6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620176846.5U CN205643384U (en) | 2016-03-09 | 2016-03-09 | Ultrasonic sensor that can be self -heating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620176846.5U CN205643384U (en) | 2016-03-09 | 2016-03-09 | Ultrasonic sensor that can be self -heating |
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| Publication Number | Publication Date |
|---|---|
| CN205643384U true CN205643384U (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620176846.5U Expired - Fee Related CN205643384U (en) | 2016-03-09 | 2016-03-09 | Ultrasonic sensor that can be self -heating |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106914399A (en) * | 2017-02-24 | 2017-07-04 | 常州波速传感器有限公司 | Industry control ultrasonic probe and the method for improving industry control ultrasonic probe |
| CN109900924A (en) * | 2019-03-26 | 2019-06-18 | 中国电子科技集团公司第四十九研究所 | The preparation method of hot diaphragm type wind speed sensing unit, sensor and sensing unit based on HTCC technique |
| CN110823359A (en) * | 2019-11-14 | 2020-02-21 | 北京遥测技术研究所 | Low-temperature optical fiber sound sensing system |
-
2016
- 2016-03-09 CN CN201620176846.5U patent/CN205643384U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106914399A (en) * | 2017-02-24 | 2017-07-04 | 常州波速传感器有限公司 | Industry control ultrasonic probe and the method for improving industry control ultrasonic probe |
| CN109900924A (en) * | 2019-03-26 | 2019-06-18 | 中国电子科技集团公司第四十九研究所 | The preparation method of hot diaphragm type wind speed sensing unit, sensor and sensing unit based on HTCC technique |
| CN110823359A (en) * | 2019-11-14 | 2020-02-21 | 北京遥测技术研究所 | Low-temperature optical fiber sound sensing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20161012 Termination date: 20170309 |