CN1769924B - Ultrasonic receiver transmitter - Google Patents
Ultrasonic receiver transmitter Download PDFInfo
- Publication number
- CN1769924B CN1769924B CN2005100800065A CN200510080006A CN1769924B CN 1769924 B CN1769924 B CN 1769924B CN 2005100800065 A CN2005100800065 A CN 2005100800065A CN 200510080006 A CN200510080006 A CN 200510080006A CN 1769924 B CN1769924 B CN 1769924B
- Authority
- CN
- China
- Prior art keywords
- piezoelectric element
- ultrasonic receiver
- receiver transmitter
- shell
- bottom tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 16
- 239000000956 alloy Substances 0.000 claims abstract description 16
- 229910001374 Invar Inorganic materials 0.000 claims abstract description 5
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 9
- 239000003990 capacitor Substances 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 abstract 1
- 230000003068 static effect Effects 0.000 description 13
- 239000000463 material Substances 0.000 description 11
- 230000004888 barrier function Effects 0.000 description 7
- 239000000565 sealant Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000002210 silicon-based material Substances 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 230000009514 concussion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2217/00—Details of magnetostrictive, piezoelectric, or electrostrictive transducers covered by H04R15/00 or H04R17/00 but not provided for in any of their subgroups
- H04R2217/03—Parametric transducers where sound is generated or captured by the acoustic demodulation of amplitude modulated ultrasonic waves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
To solve the problem that a temperature compensating capacitor used as a remedy for change in electrostatic capacity due to change in temperature, increase in reverberation time, and inability of obstacle detection in a close range is high-cost, and that the reflection sensitivity is deteriorated when invar alloys or the like of low thermal expansion are adhered between a bottomed cylindrical case and a piezoelectric element, to the opposite side of the piezoelectric element on the side of the case in the shape of a cylinder with bottom or to both sides of a piezoelectric element, in a conventional ultrasonic wave transmitting and receiving device. In the ultrasonic wave transmitting and receiving device, annularly formed invar alloys or the like of low thermal expansion are embedded in an annular groove provided on the surface for adhesion of the piezoelectric element of the bottomed cylindrical case by adhesion, press-fitting or the like, and the piezoelectric element is adhered on it. In this way, obstacles can be stably detected in a wide range of temperature without using a temperature compensating capacitor and without deterioration of reflection sensitivity.
Description
Technical field
The present invention relates to carry out the transmission of ultrasound wave frequency band, the ultrasonic receiver transmitter of reception.
Background technology
The ultrasound wave sender of embodiment was meant in the past, ultrasonic receiver transmitter embedded be arranged on the automotive muffler etc., under the situation of the barrier that will detect peripheral vehicle, by to ultrasonic receiver transmitter input pulse train electric signal, thereby produce concussion with the corresponding ultrasonic signal of pulse train electric signal from the ultrasonic receiver transmitter input, the ultrasonic signal of concussion arrives barrier, the ultrasonic signal of running into barrier is reflected by this barrier, and the ultrasonic signal that a part is launched turns back in the same ultrasonic receiver transmitter.Ultrasonic receiver transmitter detects barrier by receiving its reflected signal.
But problem is that in the ultrasonic receiver transmitter of embodiment, the static capacity of ultrasonic receiver transmitter changed with variation of ambient temperature in the past, thereby the reverberation time is long, can not closely detect; And, in order to mend the variation of the static capacity that reward causes because of temperature variation, general serviceability temperature compensation condenser, but this can increase cost, improve the price of system.We are called in the past embodiment 1 to above-mentioned this point, and Fig. 3 (a) represents the summary longitudinal section of the ultrasonic receiver transmitter that this embodiment relates to.Among Fig. 3 (a), on the inside, bottom surface that bottom tube-like shell 2 is arranged that constitutes by aluminium etc., post piezoelectric element 1 to constitute single face waviness oscillator (ユ ニ モ Le Off ticker).Input and output lead-in wire 5a is drawn from piezoelectric element 1 face opposite by solder etc. with adhesive surface one side that bottom tube-like shell 2 is arranged, and from there being bottom tube-like shell 2 that input and output lead-in wire 5b is drawn.Piezoelectric element 1 and adhesive surface one side that bottom tube-like shell 2 is arranged and have bottom tube-like 2 to be electrically connected, and then, piezoelectric element 1 and input and output lead-in wire 5a and bottom tube-like shell 2 is arranged and the input and output 5b that goes between is electrically connected.To be placed on by the acoustic absorbant 6 that silicon foaming body etc. constitutes piezoelectric element 1 above, and face sealant 4 that elastic bodys such as silicon materials, polyurethane material are constituted has been filled in the bottom tube-like shell 2 and has constituted from it.
For improving this problem, can consider to make with the following method: by have between bottom tube-like shell and the piezoelectric element or piezoelectric element invar alloy that sticks low heat expansion alloy on opposite face of bottom tube-like shell one side or the two sides at piezoelectric element etc. arranged, just can suppress the variation of the static capacity of the ultrasonic receiver transmitter that brings because of temperature variation, and the variation of inhibition reverberation.Above this point as in the past embodiment 2.Fig. 3 (b), Fig. 3 (c) and Fig. 3 (d) represent the summary longitudinal section of the ultrasonic receiver transmitter of this embodiment.Among Fig. 3 (b), on the inside, bottom surface that bottom tube-like shell 2 is arranged that constitutes by aluminum etc., post the utmost point material 3 that constitutes by low heat expansion alloy etc. and the piezoelectric element 1 of fitting again thereon to constitute single face waviness oscillator.Input and output lead-in wire 5a is drawn from piezoelectric element 1 face opposite by solder etc. with adhesive surface one side of the sheet material 3 that constitutes by low heat expansion alloy etc., and from there being bottom tube-like shell 2 that input and output lead-in wire 5b is drawn.Adhesive surface one side of piezoelectric element 1 and the sheet material 3 that constitutes by low heat expansion alloy etc. and have bottom tube-like 2 to be electrically connected, and then, piezoelectric element 1 and input and output lead-in wire 5a and bottom tube-like shell 2 is arranged and the input and output 5b that goes between is electrically connected.To be placed on by the acoustic absorbant 6 that silicon foaming body etc. constitutes piezoelectric element 1 above, and face has been filled in the sealant 4 of formations such as silicon materials, polyurethane material that bottom tube-like shell 2 is inner to be constituted from it.
But, this method produces following problem: though this method can obtain to suppress the variation of the static capacity of the ultrasonic receiver transmitter that brings because of temperature variation, and can suppress reverberation variation and so on improve effect, but compare with ultrasonic receiver transmitter in the past, reflection sensitivity descends.
Above prior art can be referring to patent documentation-TOHKEMY 2004-135089 communique and the glad department's work of Non-Patent Document-paddy waist " ultrasound wave and using method-ultrasonic receiver transmitter thereof, supersonic motor ", " daily magazine industry news ", 1994 years.
Summary of the invention
The problem to be solved in the present invention is, suppresses the variation of the static capacity brought because of temperature variation under the situation that does not reduce reflection sensitivity, and suppresses the variation of reverberation.
The objective of the invention is to, when being used to move backward sensor etc., having realized under the state of serviceability temperature compensation condenser not also can the liftoff barrier that stably detects of low coverage in wider temperature range.
In order to realize the foregoing invention purpose, ultrasonic receiver transmitter of the present invention is, post piezoelectric element in the inside, bottom surface that the bottom tube-like shell is arranged to constitute the single face oscillator, carry out hyperacoustic transmission, reception at lateral surface with the shell of this single face oscillator, it is characterized in that, on the adhesive surface of the piezoelectric element that the bottom tube-like shell is arranged, endless groove is set, by bonding or be pressed into to wait to be embedded into the invar alloy of the shape low heat expansion alloy identical, that be processed into ring-type of this endless groove etc. the piezoelectric element of fitting is thereon again arranged in the bottom tube-like shell.So, just can under the situation that does not reduce reflection sensitivity, suppress the variation of the static capacity of the ultrasonic receiver transmitter that brings because of temperature variation, and suppress the variation of reverberation.
The invention has the advantages that because reflection is highly sensitive, and the static capacity of bringing because of temperature variation changes for a short time, therefore, even the serviceability temperature compensation condenser can misoperation in wider temperature range yet, thereby can detect in-plant barrier.
Description of drawings
Fig. 1 is the ultrasonic receiver transmitter summary longitudinal section of the embodiment of the invention.
Fig. 2 (a) is the approximate vertical view that the bottom tube-like shell is arranged and the longitudinal section of the ultrasonic receiver transmitter of the embodiment of the invention.
Fig. 2 (b) is the approximate vertical view that the bottom tube-like shell is arranged and the longitudinal section of the ultrasonic receiver transmitter of another embodiment of the present invention.
Fig. 2 (c) is the approximate vertical view that the bottom tube-like shell is arranged and the longitudinal section of the ultrasonic receiver transmitter of another embodiment of the present invention.
Fig. 3 (a) is the summary longitudinal section of the ultrasonic receiver transmitter of embodiment 1 in the past.
Fig. 3 (b) is the summary longitudinal section of the ultrasonic receiver transmitter of embodiment 2 in the past.
Fig. 3 (c) is the summary longitudinal section of the ultrasonic receiver transmitter of embodiment 2 in the past.
Fig. 3 (d) is the summary longitudinal section of the ultrasonic receiver transmitter of embodiment 2 in the past.
Fig. 4 represents static capacity temperature variation and the static capacity temperature variation of thermo-compensation capacitor and the synthetic static capacity temperature variation of ultrasonic receiver transmitter and thermo-compensation capacitor of ultrasonic receiver transmitter.
Fig. 5 represents the reverberation time of the ultrasonic receiver transmitter of embodiment in the past.
Fig. 6 represents the reverberation time of the ultrasonic receiver transmitter of the embodiment of the invention.
Fig. 7 represents the reflection sensitivity degree of the ultrasonic receiver transmitter of the ultrasonic receiver transmitter of embodiment 1 in the past and 2 and the embodiment of the invention.
Among the figure:
1, piezoelectric element 2, the bottom tube-like shell is arranged
3, sheet material 4, the sealant of low heat expansion alloy formation
5a, input and output lead-in wire 5b, input and output lead-in wire
6, acoustic absorbant 7, be arranged on the groove of inside, bottom tube-like shell bottom surface
Embodiment
Below, with reference to the description of drawings embodiments of the invention.
Embodiment
Fig. 1 represents the summary longitudinal section of the ultrasonic receiver transmitter of the embodiment of the invention.Fig. 2 (a) is the approximate vertical view that the bottom tube-like shell is arranged and the longitudinal section of the ultrasonic receiver transmitter of the expression embodiment of the invention, and Fig. 2 (b) and Fig. 2 (c) are the approximate vertical view that the bottom tube-like shell is arranged and the longitudinal sections of the ultrasonic receiver transmitter of expression another embodiment of the present invention.Among Fig. 1, be provided with endless groove 7 in the inside, bottom surface that bottom tube-like shell 2 is arranged that constitutes by aluminium etc., by boning or being pressed into the sheet material 3 that is processed into the formations such as low heat expansion alloy of same ring-type is embedded in the groove 7 that is located at the bottom tube-like shell, the piezoelectric element 1 of fitting thereon again is to constitute single face waviness oscillator.In addition, be located at the groove 7 on the bottom tube-like shell 2 and the sheet material 3 that is made of the low heat expansion alloy that embeds wherein can not be ring-type yet shown in Fig. 2 (b).In addition, shown in Fig. 2 (c), also can be divided into several to the sheet material 3 that is made of low heat expansion alloy and embed and be located near the adhesive surface of piezoelectric element 1, the piezoelectric element 1 of fitting thereon again be to constitute single face waviness oscillator.Input and output lead-in wire 5a is drawn and from there being bottom tube-like shell 2 that input and output lead-in wire 5b is drawn from piezoelectric element 1 face opposite and piezoelectric element 1 by solder with adhesive surface one side that bottom tube-like shell 2 is arranged.
Adhesive surface one side piezoelectric element 1 and that bottom tube-like shell 2 is arranged and the sheet material 3 that constitutes by low heat expansion alloy etc. and have bottom tube-like shell 2 to be electrically connected, and piezoelectric element 1 is with input and output lead-in wire 5a and have bottom tube-like shell 2 to be electrically connected with input and output lead-in wire 5b.The acoustic absorbant 6 that placement is made of foaming silicon etc. on piezoelectric element 1, the sealant 4 that will be made of silicon materials, polyurethane material etc. constitutes the face inside that is filled to bottom tube-like shell 2 from it again.
As shown in Figure 4, the situation of the ultrasonic receiver transmitter of embodiment 1 in the past is, static capacity varies with temperature and changes, and like this, skew occurs with the resonance point of the inductance of employed transformer in the circuit, as shown in Figure 5, can increase reverberation.As countermeasure, ultrasonic receiver transmitter and thermo-compensation capacitor with opposite temperature characterisitic are carried out parallel connection, can suppress static capacity and vary with temperature and change.
Among the present invention, change with ultrasonic receiver transmitter self temperature variation owing to suppressed static capacity, therefore, even the serviceability temperature compensation condenser can not realized same temperature characterisitic yet.Fig. 5 represents the synoptic diagram of the ultrasonic receiver transmitter reverberation time of embodiment 1 in the past.Fig. 6 is the synoptic diagram of the ultrasonic receiver transmitter reverberation time of the expression embodiment of the invention.And, the ultrasonic receiver transmitter of in the past embodiment 2 is compared with the ultrasonic receiver transmitter of in the past embodiment 1, though its reflection sensitivity reduces, the embodiment of the invention can prevent this point, that is, can guarantee equal reflection sensitivity with embodiment 1 in the past.Fig. 7 be represent in the past embodiment 1 and the comparison diagram of the reflection sensitivity of the ultrasonic receiver transmitter of the ultrasonic receiver transmitter of embodiment 2 and embodiments of the invention.
The present invention is not limited only to the sensor of moveing backward, and also can be applicable in the every field of utilizing anti-dripping (anti-oil dripping) type ultrasonic receiver transmitter.
Claims (1)
1. ultrasonic receiver transmitter, post piezoelectric element in the inside, bottom surface that the bottom tube-like shell is arranged to constitute the single face oscillator, shell lateral surface with this single face oscillator carries out hyperacoustic transmission, reception, it is characterized in that, on the adhesive surface of the piezoelectric element that the bottom tube-like shell is arranged, endless groove is set, by bonding or be pressed into the invar alloy with the shape of this endless groove low heat expansion alloy that coincide, that be processed into ring-type is embedded into the piezoelectric element of fitting is thereon again arranged in the bottom tube-like shell.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004321462 | 2004-11-05 | ||
| JP2004-321462 | 2004-11-05 | ||
| JP2004321462A JP2006135573A (en) | 2004-11-05 | 2004-11-05 | Ultrasonic wave transmitting and receiving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1769924A CN1769924A (en) | 2006-05-10 |
| CN1769924B true CN1769924B (en) | 2010-12-08 |
Family
ID=36728725
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005100800065A Expired - Fee Related CN1769924B (en) | 2004-11-05 | 2005-06-24 | Ultrasonic receiver transmitter |
| CNU200520110463XU Expired - Fee Related CN2828838Y (en) | 2004-11-05 | 2005-06-24 | Ultrasonic receiving-transmitting apparatus |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200520110463XU Expired - Fee Related CN2828838Y (en) | 2004-11-05 | 2005-06-24 | Ultrasonic receiving-transmitting apparatus |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2006135573A (en) |
| KR (2) | KR100742710B1 (en) |
| CN (2) | CN1769924B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006135573A (en) * | 2004-11-05 | 2006-05-25 | Nippon Ceramic Co Ltd | Ultrasonic wave transmitting and receiving device |
| JP2008271145A (en) * | 2007-04-19 | 2008-11-06 | Nippon Ceramic Co Ltd | Ultrasonic wave transmitting/receiving apparatus |
| JP5111977B2 (en) * | 2007-08-28 | 2013-01-09 | 日本セラミック株式会社 | Ultrasonic transducer |
| JP5288237B2 (en) * | 2007-12-18 | 2013-09-11 | 株式会社河西精機製作所 | Ultrasonic sensor manufacturing method, polycrystalline aluminum molded body manufacturing method, and ultrasonic sensor |
| KR100950573B1 (en) | 2008-01-07 | 2010-04-01 | 두산중공업 주식회사 | Multi channel type ultrasonic flow detection apparatus |
| JP4656261B2 (en) * | 2008-12-04 | 2011-03-23 | 株式会社村田製作所 | Ultrasonic transducer |
| WO2013051525A1 (en) * | 2011-10-05 | 2013-04-11 | 株式会社村田製作所 | Ultrasonic sensor |
| JP5814797B2 (en) * | 2012-01-06 | 2015-11-17 | 日本セラミック株式会社 | Ultrasonic transceiver |
| WO2015152036A1 (en) * | 2014-03-31 | 2015-10-08 | 株式会社村田製作所 | Ultrasonic sensor |
| DE102014207681A1 (en) * | 2014-04-24 | 2015-10-29 | Robert Bosch Gmbh | Membrane for an ultrasonic transducer and ultrasonic transducer |
| JP6311516B2 (en) * | 2014-07-30 | 2018-04-18 | 株式会社Ｓｏｋｅｎ | Ultrasonic object detection device |
| KR102000608B1 (en) * | 2015-04-13 | 2019-07-16 | 가부시키가이샤 무라타 세이사쿠쇼 | Ultrasonic sensor and its control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004056450A (en) * | 2002-07-19 | 2004-02-19 | Nec Tokin Corp | Ultrasonic sensor |
| JP2004135089A (en) * | 2002-10-10 | 2004-04-30 | Nippon Ceramic Co Ltd | Ultrasonic sensor |
| JP2004146879A (en) * | 2002-10-21 | 2004-05-20 | Nippon Ceramic Co Ltd | Drip-proof type ultrasonic transceiver |
| CN2828838Y (en) * | 2004-11-05 | 2006-10-18 | 日本陶瓷株式会社 | Ultrasonic receiving-transmitting apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02116299A (en) * | 1988-10-26 | 1990-04-27 | Matsushita Electric Ind Co Ltd | Ultrasonic sensor |
| JPH10206528A (en) * | 1997-01-21 | 1998-08-07 | Oki Ceramic Kogyo Kk | Ultrasonic sensor |
| JP3233059B2 (en) * | 1997-03-07 | 2001-11-26 | 株式会社村田製作所 | Ultrasonic sensor |
| JP2002055156A (en) * | 2000-08-11 | 2002-02-20 | Nippon Soken Inc | Ultrasonic sensor |
-
2004
- 2004-11-05 JP JP2004321462A patent/JP2006135573A/en active Pending
-
2005
- 2005-06-02 KR KR1020050047319A patent/KR100742710B1/en not_active IP Right Cessation
- 2005-06-24 CN CN2005100800065A patent/CN1769924B/en not_active Expired - Fee Related
- 2005-06-24 CN CNU200520110463XU patent/CN2828838Y/en not_active Expired - Fee Related
-
2007
- 2007-03-26 KR KR1020070029422A patent/KR100742711B1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004056450A (en) * | 2002-07-19 | 2004-02-19 | Nec Tokin Corp | Ultrasonic sensor |
| JP2004135089A (en) * | 2002-10-10 | 2004-04-30 | Nippon Ceramic Co Ltd | Ultrasonic sensor |
| JP2004146879A (en) * | 2002-10-21 | 2004-05-20 | Nippon Ceramic Co Ltd | Drip-proof type ultrasonic transceiver |
| CN2828838Y (en) * | 2004-11-05 | 2006-10-18 | 日本陶瓷株式会社 | Ultrasonic receiving-transmitting apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100742710B1 (en) | 2007-07-25 |
| CN2828838Y (en) | 2006-10-18 |
| JP2006135573A (en) | 2006-05-25 |
| KR20070048676A (en) | 2007-05-09 |
| KR100742711B1 (en) | 2007-07-25 |
| KR20060049525A (en) | 2006-05-19 |
| CN1769924A (en) | 2006-05-10 |
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