CN2498615Y - Miniature ultrasonic distance sensor - Google Patents
Miniature ultrasonic distance sensor Download PDFInfo
- Publication number
- CN2498615Y CN2498615Y CN 00262863 CN00262863U CN2498615Y CN 2498615 Y CN2498615 Y CN 2498615Y CN 00262863 CN00262863 CN 00262863 CN 00262863 U CN00262863 U CN 00262863U CN 2498615 Y CN2498615 Y CN 2498615Y
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- China
- Prior art keywords
- ultrasonic distance
- distance measuring
- miniature ultrasonic
- housing
- piezoelectric ceramic
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- Expired - Fee Related
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- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
Disclosed is an ultrasonic distance measurement micro-sensor which comprises a shell, a damping metal base in seal connection with the opening of the shell, a piezoelectric ceramic plate arranged on the inside bottom surface of the shell as a sensing medium, damping acoustical absorbent pressed between the piezoelectric ceramic plate and the damping metal base and a signal transmission wire connected to the piezoelectric ceramic plate. The sensor of the utility model which is characterized by small size, water resistance, dust resistance, rust resistance, low residual oscillation, high sensitivity, good directivity, long measured distance, simple production process and low cost can be conveniently applied for various vehicle distance measurement equipments.
Description
The utility model relates to sensor technical field, is specifically related to a kind of miniature ultrasonic distance measuring sensor that can be used for the vehicle range finding.
At present, the sensor that is used for the short distance ultrasonic ranging mainly contains two classes: a class adopts two sensors, and one of them is used to launch ultrasound wave, and another is used to receive ultrasound wave; Another kind of is to adopt single-sensor, both launches, and does again to receive and uses.This two classes sensor exists following problem at present: first kind sensor needs just can finish emission, receiving function with two senser elements cooperations, though the volume of each single device can be done lessly, but to each other apart from hour, because of the mechanical vibration influence, the remained shock time is longer, and the closely blind area that causes finding range is strengthened, for these two transducer spacings need strengthen, thereby the actual volume of the device of doing is bigger, and needs 3～4 leads, and inconvenience is installed.Second class is to adopt the sensor of single transceiver, its shell adopts the body cavity and the thicker cavity of larger volume, remained shock when finishing to reduce emission, and the aluminiums that adopt process its processing technology complexity, cost of manufacture height more on the material through punching press or turnning and milling, be difficult for producing in enormous quantities, and aluminum shell when using under silent-sound judder, easy to wear and can in wet environment, accelerate to corrode, influence serviceable life.
The purpose of this utility model provides a kind of miniature ultrasonic distance measuring sensor that can overcome above-mentioned prior art shortcoming, and this sensor is both waterproof dustproof, also can be antirust anti-oxidation; The more important thing is that not only volume is little, and anti-seismic performance is good, both can eliminates or alleviate remained shock greatly, in-plant blind area when reducing to find range greatly, guarantee highly sensitively again, detection range is far away, and directive property is good, simultaneously, processing technology is simple, is fit to produce low cost of manufacture in enormous quantities.
The purpose of this utility model is to realize like this, construct a kind of miniature ultrasonic distance measuring sensor, comprise housing, the vibration damping metal pedestal that is tightly connected with shell nozzle, be provided with piezoelectric ceramic piece in housing inner chamber bottom surface, between described piezoelectric ceramic piece and described vibration damping metal pedestal, be pressed with vibration damping/sound absorbing material, also comprise the signal transmssion line that is connected on the described piezoelectric ceramic piece.
In the above-mentioned miniature ultrasonic distance measuring sensor that provides according to the utility model, described piezoelectric ceramic piece and described housing underrun tackifier are fixed.
In the above-mentioned miniature ultrasonic distance measuring sensor that provides according to the utility model, the structure that is tightly connected of described vibration damping metal pedestal and described housing is the flanged lip that is provided with an annular at the edge of opening of described housing, described vibration damping metal pedestal is a discoid body that has the seam step, the inboard of described seam step is provided with the sealed groove of an annular, the lower surface of the surface of described seam step and described housing flanged lip fits tightly and links together, the inner wall shape kissing merging of the outward flange of described discoid body and described housing closely is connected on the inwall of housing, one end face of described vibration damping/sound absorbing material and an end face of described discoid body fit tightly together, and an end face of the other end of described vibration damping/sound absorbing material and sensor information piezoelectric ceramic piece fits tightly together.
In the above-mentioned miniature ultrasonic distance measuring sensor that provides according to the utility model, described vibration damping metal pedestal is provided with a through hole, in the described through hole insulating material is housed, and described transmission line passes described insulating material and is connected with the outside.
In the above-mentioned miniature ultrasonic distance measuring sensor that provides according to the utility model, described housing adopts stainless steel material to make.
In the above-mentioned miniature ultrasonic distance measuring sensor that provides according to the utility model, the surface of described seam step fits tightly to be connected with the lower surface of described housing flanged lip can adopt conductive adhesive or mutual melting welding or securing member ways of connecting to be connected.
In the above-mentioned miniature ultrasonic distance measuring sensor that provides according to the utility model, the height of described vibration damping/sound absorbing material is not less than 0.4mm, the thickness of described metal pedestal is not less than 0.4mm, and the height that the outward flange of described discoid body is connected in the inwall of housing is not less than 1/20th of described housing inner chamber height.
Implement the miniature ultrasonic distance measuring sensor that the utility model provides, make housing with stainless steel material, and adopt hermetic structure, have functions such as antirust anti-oxidation water proof and dust proof; Vibration damping/sound absorbing material is housed in the housing, and housing fits tightly to be connected with vibration damping metal pedestal and can make sensor that the aftershock performance that well disappears is arranged, thereby minimizing range hole, improve range finding sensitivity, range finding directive property is good, and volume is little, and is simple in structure, cost is also low, is the better ultrasonic ranging sensor of a kind of usability.
Further specify the utility model below in conjunction with accompanying drawing with embodiment, in the accompanying drawing:
Fig. 1 is the structure cross-sectional schematic of miniature ultrasonic distance measuring sensor described in the utility model;
Fig. 2 is the structure cross-sectional schematic of vibration damping metal pedestal among Fig. 1;
Decomposition texture cross-sectional schematic when Fig. 3 is each part assembling of miniature ultrasonic distance measuring sensor described in the utility model.
As shown in figures 1 and 3, in the miniature ultrasonic distance measuring sensor that the utility model provides, piezoelectric ceramic piece 3, vibration damping/sound absorbing material 4, vibration damping metal pedestal 5 as sensor information are housed successively in Stainless Steel Shell 1 inner chamber bottom surface, for improving the Corrosion Protection and the structure miniaturization of sensor, housing 1 adopts the stainless steel material manufacturing and has an opening at least, for improving the sensitivity of sensor, the one side of described piezoelectric ceramic piece 3 adopts tackifier 2 tightly to be pasted on the inner chamber bottom surface of housing 1; As shown in Figure 2, for transducing signal being sent to relevant control circuit, the transducing signal transmission line 7 that has been welded on piezoelectric ceramic piece 3 is provided with through hole 12 in described vibration damping metal pedestal 5, insulating material 8 is housed in the hole, and described transmission line 7 passes insulating material 8 and is connected with the external world; Be water proof and dust proof performance that improves sensor and the aftershock that reduces sensor, vibration damping metal pedestal 5 adopts hermetic structure to be connected with the opening part of housing 1.
As shown in Figure 3, be provided with an annulus limit 10 of outwards protruding at the edge of opening place of housing 1, coupled vibration damping metal pedestal 5 is discoid bodies that have seam step 9, the boss outward flange of described plate-like vibration damping metal pedestal 5 and the inner wall shape kissing of Stainless Steel Shell 1 merge with the projection section of vibration damping metal pedestal 5 tightly clamping be connected; In the inner ring surface of seam step 9, be shaped on a toroidal cavity 11 at vibration damping metal pedestal 5, annular groove 11 can improve sealing property, reduce and interfere, the annulus limit 10 of stainless steel case 1 tightly is tightly connected together with the sealing seam step 9 of vibration damping metal pedestal 5, and that the method for connection can adopt is gluing, be welded together mutually or adopt securing member to connect.
Between piezoelectric ceramic piece 3 and vibration damping metal pedestal 5 one or more layers vibration damping sound-absorbing insulating material 4 can be housed, for guaranteeing the effect of vibration damping sound-absorbing, vibration damping sound-absorbing insulating material overall height is no less than 0.4mm.Transmission line 7 can be connected with the another side of piezoelectric ceramic piece by pad 6, and passes vibration damping sound-absorbing insulating material 4 and pass from the wire guide 12 of vibration damping metal pedestal 5.Insulating material 8 in the wire guide 12 separates transmission line 7 and vibration damping metal pedestal 5, in case short circuit.
Be connected sealing effectiveness and intensity for the effect that guarantees the vibration damping and the aftershock that disappears and housing 1 and metal pedestal 5, the gross thickness of metal pedestal 5 is not less than 0.4mm, metal pedestal 5 boss link to each other with housing 1 inwall the part height be no less than 1/20th of Stainless Steel Shell height overall.
The Miniature ultrasonic distance sensor that the utility model provides has that volume is little, waterproof and dustproof, Antirust, remained shock is little, highly sensitive, directive property good, the test blind area is little, far away, the worker of measuring distance The characteristics such as simple cost is low of planting are the better ultrasonic distance-measuring sensors of a kind of performance.
Claims (8)
1, a kind of miniature ultrasonic distance measuring sensor, it is characterized in that, comprise housing (1) and the damping metal pedestal (5) that is tightly connected with this shell nozzle, piezoelectric ceramic piece (3) fixedly is equipped with in described housing bottom surface, be pressed with damping acoustical material (4) between piezoelectric ceramic piece (3) and described damping metal pedestal (5), described piezoelectric ceramic piece (3) is connected to signal transmssion line (7).
According to the described miniature ultrasonic distance measuring sensor of claim 1, it is characterized in that 2, described piezoelectric ceramic piece (3) is fixing by tackifier (2) with described housing (1).
3, according to the described miniature ultrasonic distance measuring sensor of claim 1, it is characterized in that, described housing (1) open side edge is provided with an annulus limit (10), described damping metal pedestal (5) is a discoid body that has seam step (9), the inboard of described seam step (9) table top is provided with the sealed groove (11) of an annular, the lower surface that the surface of described seam step (9) and described shell are stopped (1) annulus limit fits tightly and is connected, and the inner wall shape kissing of the boss outward flange of described discoid body and described housing (1) also closely is connected on the inwall of described housing (1).
4, according to claim 1 or 3 described miniature ultrasonic distance measuring sensors, it is characterized in that, the end face of one end face of described damping acoustical material (4) and described sensor information piezoelectric ceramic piece (3) tightly fits together, and the end face of the other end of described damping acoustical material (4) and described damping metal pedestal (5) discoid body is tightly fitted.
5, according to claim 1 or 3 described miniature ultrasonic distance measuring sensors, it is characterized in that, described damping metal pedestal (5) is provided with a through hole (12), and insulating material (8) is housed in the described through hole (12), and described transmission line (7) passes described insulating material (8) and leads to the outside.
According to each described miniature ultrasonic distance measuring sensor of claim 1-3, it is characterized in that 6, described housing (1) adopts stainless steel material to make.
According to the described miniature ultrasonic distance measuring sensor of claim 3, it is characterized in that 7, the surface of described seam step fits tightly to be connected with the lower surface of described housing flanged lip can adopt the mode of cementing agent or melting welding mutually to be connected.
8, according to the described miniature ultrasonic distance measuring sensor of claim 3, the thickness of described damping acoustical material is not less than 0.4mm, the thickness of described metal pedestal is not less than 0.4mm, and the height that the outward flange of described discoid body is connected in the inwall of housing is not less than 1/20th of described housing inner chamber height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00262863 CN2498615Y (en) | 2000-11-22 | 2000-11-22 | Miniature ultrasonic distance sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00262863 CN2498615Y (en) | 2000-11-22 | 2000-11-22 | Miniature ultrasonic distance sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2498615Y true CN2498615Y (en) | 2002-07-03 |
Family
ID=33617991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00262863 Expired - Fee Related CN2498615Y (en) | 2000-11-22 | 2000-11-22 | Miniature ultrasonic distance sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2498615Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101124487B (en) * | 2005-02-23 | 2011-01-19 | 瓦莱奥开关传感器有限公司 | Modularized ultrasonic sensor |
| CN106076794A (en) * | 2016-08-24 | 2016-11-09 | 复旦大学 | Same phase close-packed array formula ultrasonic transmitting element |
| CN106546974A (en) * | 2015-09-23 | 2017-03-29 | 北京行易道科技有限公司 | A kind of small-sized millimetre-wave radar sensor device |
| CN110572759A (en) * | 2019-08-30 | 2019-12-13 | Oppo广东移动通信有限公司 | Electronic device |
-
2000
- 2000-11-22 CN CN 00262863 patent/CN2498615Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101124487B (en) * | 2005-02-23 | 2011-01-19 | 瓦莱奥开关传感器有限公司 | Modularized ultrasonic sensor |
| CN106546974A (en) * | 2015-09-23 | 2017-03-29 | 北京行易道科技有限公司 | A kind of small-sized millimetre-wave radar sensor device |
| CN106076794A (en) * | 2016-08-24 | 2016-11-09 | 复旦大学 | Same phase close-packed array formula ultrasonic transmitting element |
| CN110572759A (en) * | 2019-08-30 | 2019-12-13 | Oppo广东移动通信有限公司 | Electronic device |
| CN110572759B (en) * | 2019-08-30 | 2020-12-15 | Oppo广东移动通信有限公司 | Electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |