CN1570351A - Low-frequency sound wave stacked piezo-electric transducer - Google Patents
Low-frequency sound wave stacked piezo-electric transducer Download PDFInfo
- Publication number
- CN1570351A CN1570351A CN200410026076.8A CN200410026076A CN1570351A CN 1570351 A CN1570351 A CN 1570351A CN 200410026076 A CN200410026076 A CN 200410026076A CN 1570351 A CN1570351 A CN 1570351A
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- output
- operational amplifier
- sound wave
- pins
- circuit
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- 238000005192 partition Methods 0.000 claims abstract description 9
- 238000009413 insulation Methods 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 21
- 230000003321 amplification Effects 0.000 claims description 13
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 13
- 230000008676 import Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 3
- 210000004907 gland Anatomy 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 210000003141 lower extremity Anatomy 0.000 abstract 3
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 239000012212 insulator Substances 0.000 abstract 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract 2
- 238000012856 packing Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 101100491335 Caenorhabditis elegans mat-2 gene Proteins 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
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- Transducers For Ultrasonic Waves (AREA)
Abstract
This invention one kind of low frequency sound wave has folded the level is the piezoelectricity inductor, including the outer covering, has the gasket in the outer covering flank establishment, has the sound wave in the outer covering inside establishment inlet, the sound wave inlet two sides connections has the partition insulator, establishes lower part the partition insulator has the O seal packing collar, directs trunking the establishment to the outer covering inside, directs trunking the lower extremity establishment has the insulation inner coating, the insulation inner coating with stops turns on lathe the partition board mutually to connect, stops turns on lathe the screw to fix in stops turns on lathe right flank the partition board, opens in the outer covering base has the plug dead plate, the plug dead plate connection plug, establishes in the sound wave inlet lower part has the higher authority board, The subordinate board through basically folds the level piezoelectricity piece to connect with on, the lead wire hole establishment to the subordinate board lower extremity, automatically tracks the enlargement electric circuit board and the lead wire hole connection, the thread presses the wrap to fix and to stop turns on lathe the partition board the lower extremity, this invention is uses in the low frequency sound wave survey, in the signal to noise ratio machine sensitivity, the transmission characteristic, bore aspect and so on high-pressured corrosion resistivity had a bigger enhancement.
Description
Technical field
The present invention relates to a kind of piezoelectric transducer, be specifically related to a kind of low-frequency sound wave laminated piezoelectric sensor.
Background technology
At present in the oil recovery process of existing oil field, various countries, the extensive use of sonic well logging technology, existing technology can be measured the degree of depth of oil well crude oil liquid level, but because subsurface environment is more abominable, wherein include a lot of corrosive gas, testing arrangement there is very large corrosiveness, cause the life-span of existing colloid encapsulation garden column casing shape piezoelectric transducer very low, and low, the poor signal to noise of this transducer sensitivity, it need be transferred in the other amplifying circuit by long side traverse from the impedance weak electric signal and amplify, and this transmission course is interfered especially easily.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, the low-frequency sound wave laminated piezoelectric that a kind of mechanism is simple, highly sensitive, antijamming capability is strong sensor is provided.
For achieving the above object, the technical solution adopted in the present invention is: the bottom at the sound wave input hole is provided with top crown, bottom crown is connected with top crown by the stacked piezoelectric sheet, fairlead is arranged at the lower end of bottom crown, be connected with fairlead from the motion tracking magnification circuit plate, the screw thread gland is fixed in the lower end of only revolving dividing plate, comprise pre-amplification circuit from the motion tracking magnification circuit plate, the input of pre-amplification circuit connects the high impedance voltage signal of stacked piezoelectric sheet output, the output of pre-amplification circuit connects filter circuit, the output of filter circuit is connected with the driving amplifying circuit, drive amplifying circuit and connect low input impedance variable-gain amplifying circuit, low input impedance variable-gain amplifying circuit is connected with feedback circuit.
The present invention also has following characteristics: the output signal positive pole of stacked piezoelectric sheet is received the end from the IN of motion tracking amplifying circuit bipod socket J1, negative pole is received the common of J1, the IN end of J1 is input to the normal phase input end of operational amplifier U1, the normal phase input end of operational amplifier U1 inserts the negative electrode of diode D1 and the anode of D2, the other end of D1 and D2 is ground connection all, the operational amplifier inverting input connects output amplifying signal is outputed to electrochemical capacitor E4, electrochemical capacitor E4 and R9 connect and compose high-pass filtering circuit, its output connects the signal of low pass filter U2 and imports 8 pin, 3 pins of low pass filter U2 directly are connected with 4 pins, 1 pin of low pass filter U2 is connected with capacitor C 1, the 6 pin ground connection of low pass filter U2 also connect the other end of C1, output 5 pin of low pass filter U2 are connected to the normal phase input end of operational amplifier U3A, the inverting input of operational amplifier U3A connects output the signal that amplifying signal outputs to variable-gain amplifier U4 is imported 3 pin, 6 pins of variable-gain amplifier U4 connect-5V power supply and electrochemical capacitor E3 one end, electrochemical capacitor E3 other end ground connection, 8 pins of variable-gain amplifier U4 connect+5V power supply and electrochemical capacitor E2 one end, electrochemical capacitor E2 other end ground connection, 1 pin of variable-gain amplifier U4 connects the adjustable end of P1, the end ground connection of P1, the P1 other end connects+the 5V power supply by R1,5 pins of variable-gain amplifier U4 connect the OUT end that 7 pins are received amplifying signal output J2,7 pins of variable-gain amplifier U4 insert the negative electrode of R2 one end and D4, the R2 other end is exported to amplifying signal the inverting input of operational amplifier U5A, the positive input end grounding of operational amplifier U5A, the inverting input of operational amplifier U5A was connected R3 and was connect the negative electrode that the U5A output outputs to amplifying signal D3, a termination R4 one end of D3, a termination R5 one end of D4, the end of R5 and the other end of R4 are with the inverting input that meets operational amplifier U5B, the normal phase input end of operational amplifier U5B connects ground connection behind the R7, the inverting input of operational amplifier U5B connects output by R6, output termination R8 one end of operational amplifier U5B, another termination E1 one end of R8 and 2 pins of variable-gain amplifier U4, E1 other end ground connection, J2+voltage of 5V termination DC-DC power module imports 1 pin, 6 pins and 7 pins of DC-DC power module export respectively+5V and-5V voltage, give circuit supply.
Description of drawings
Fig. 1 is a structure principle chart of the present invention.
Fig. 2 is that the present invention is from motion tracking amplifying circuit block diagram.
Fig. 3 is that the present invention is from motion tracking amplifying circuit schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and operating principle are described in further detail.With reference to Fig. 1, the present invention includes shell 1, arranged outside at shell 1 has sealing mat 2, be provided with sound wave input hole 3 in the inboard of shell 1, the both sides of sound wave input hole 3 are connected with isolating partition 4, be provided with O RunddichtringO 5 in the bottom of isolating partition 4, lead-in wire groove 6 is arranged at the inboard of shell 1, the lower end of lead-in wire groove 6 is provided with cover 7 in the insulation, in the insulation cover 7 with only revolve dividing plate 8 and interconnect, end rotary screw 9 and be fixed on and only revolve dividing plate 8 right sides, offer socket fixed head 10 in the bottom of shell 1,10 gang sockets 11 of socket fixed head, be provided with top crown 12 in the bottom of sound wave input hole 3, bottom crown 14 is connected with top crown 12 by stacked piezoelectric sheet 13, and fairlead 15 is arranged at the lower end of bottom crown 14, be connected with fairlead 15 from motion tracking magnification circuit plate 16, screw thread gland 17 is fixed in the lower end of only revolving dividing plate 8.The input of pre-amplification circuit 18 connects the high impedance voltage signal of stacked piezoelectric sheet 13 outputs, the output of pre-amplification circuit 18 connects filter circuit 19, the output of filter circuit 19 is connected with driving amplifying circuit 20, drive amplifying circuit 20 and connect low input impedance variable-gain amplifying circuit 21, low input impedance variable-gain amplifying circuit 21 is connected with feedback circuit 22.
With reference to Fig. 2, Fig. 3, the input of pre-amplification circuit 18 connects the high impedance voltage signal of stacked piezoelectric sheet output, the output of pre-amplification circuit 18 connects filter circuit 19, the output of filter circuit 19 is connected with driving amplifying circuit 20, drive amplifying circuit 20 and connect low input impedance variable-gain amplifying circuit 21, low input impedance variable-gain amplifying circuit 21 is connected with feedback circuit 22.The output signal positive pole of stacked piezoelectric sheet 13 is received the end from the IN of motion tracking amplifying circuit 16 bipod socket J1, negative pole is received the common of J1, the IN end of J1 is input to the normal phase input end of operational amplifier U1, the normal phase input end of operational amplifier U1 inserts the negative electrode of diode D1 and the anode of D2, the other end of D1 and D2 is ground connection all, the operational amplifier inverting input connects output amplifying signal is outputed to electrochemical capacitor E4, electrochemical capacitor E4 and R9 connect and compose high-pass filtering circuit, its output connects the signal of low pass filter U2 and imports 8 pin, 3 pins of low pass filter U2 directly are connected with 4 pins, 1 pin of low pass filter U2 is connected with capacitor C 1, the 6 pin ground connection of low pass filter U2 also connect the other end of C1, output 5 pin of low pass filter U2 are connected to the normal phase input end of operational amplifier U3A, the inverting input of operational amplifier U3A connects output the signal that amplifying signal outputs to variable-gain amplifier U4 is imported 3 pin, 6 pins of variable-gain amplifier U4 connect-5V power supply and electrochemical capacitor E3 one end, electrochemical capacitor E3 other end ground connection, 8 pins of variable-gain amplifier U4 connect+5V power supply and electrochemical capacitor E2 one end, electrochemical capacitor E2 other end ground connection, 1 pin of variable-gain amplifier U4 connects the adjustable end of P1, the end ground connection of P1, the P1 other end connects+the 5V power supply by R1,5 pins of variable-gain amplifier U4 connect the OUT end that 7 pins are received amplifying signal output J2,7 pins of variable-gain amplifier U4 insert the negative electrode of R2 one end and D4, the R2 other end is exported to amplifying signal the inverting input of operational amplifier U5A, the positive input end grounding of operational amplifier U5A, the inverting input of operational amplifier U5A was connected R3 and was connect the negative electrode that the U5A output outputs to amplifying signal D3, a termination R4 one end of D3, a termination R5 one end of D4, the end of R5 and the other end of R4 are with the inverting input that meets operational amplifier U5B, the normal phase input end of operational amplifier U5B connects ground connection behind the R7, the inverting input of operational amplifier U5B connects output by R6, output termination R8 one end of operational amplifier U5B, another termination E1 one end of R8 and 2 pins of variable-gain amplifier U4, E1 other end ground connection, J2+voltage of 5V termination DC-DC power module imports 1 pin, 6 pins and 7 pins of DC-DC power module export respectively+5V and-5V voltage, give circuit supply.D3, D4 are used for the variable-gain amplifier output signal is carried out rectification, and E1 and R8 are used for the signal after the rectification is made LPF.C1 is used for being provided with the cut-off frequency of low pass filter U2, and E4 and R9 constitute high-pass filter, and E2, E3 are used for the input power filter.
The present invention is input to the extremely low pre-amplification circuit of bias current 18 with the high impedance weak electric signal of piezoelectric patches output, the output tape splicing pass filter circuit 19 of pre-amplification circuit 18, DC component and 50Hz interference are filtered, the output of filter circuit 19 connects and drives amplifying circuit 20, drive the low input impedance variable-gain amplifying circuit 21 that amplifying circuit 20 drives thereafter, variable-gain amplifying circuit 21 carries out gain coefficient adjusting and amplification output automatically according to the signal level of feedback circuit 22.Sensing element and be encapsulated in the metal construction from the motion tracking amplifying circuit, because the high impedance signal that is interfered especially easily of piezoelectric patches output does not remake long-distance transmissions, but be directly inputted in the same encapsulating structure from the motion tracking amplifying circuit, so greatly improved antijamming capability.Because the degree of depth of crude oil liquid level is difference to some extent, the sensitivity of sensor is not high more good more during well logging.The voltage sensibility of this sensor is directly proportional with the quantity of laminated piezoelectric sheet, and the quantity by the increase and decrease piezoelectric patches changes level of sensitivity eaily.The present invention is applicable to the low-frequency sound wave measurement, and frequency response range is 0.3Hz～40Hz, is enhanced at aspects such as noise sensitivity when, transmission characteristic, high pressure resistant corrosion resistancies.
Claims (2)
1. low-frequency sound wave laminated piezoelectric sensor, comprise shell (1), arranged outside at shell (1) has sealing mat (2), be provided with sound wave input hole (3) in the inboard of shell (1), the both sides of sound wave input hole (3) are connected with isolating partition (4), be provided with O RunddichtringO (5) in the bottom of isolating partition (4), lead-in wire groove (6) is arranged at the inboard of shell (1), the lower end of lead-in wire groove (6) is provided with cover (7) in the insulation, overlap (7) in the insulation and only revolve dividing plate (8) and interconnect, only rotary screw (9) is fixed on and only revolves dividing plate (8) right side, offer socket fixed head (10) in the bottom of shell (1), socket fixed head (10) gang socket (11), it is characterized in that: be provided with top crown (12) in the bottom of sound wave input hole (3), bottom crown (14) is connected with top crown (12) by stacked piezoelectric sheet (13), fairlead (15) is arranged at the lower end of bottom crown (14), be connected with fairlead (15) from motion tracking magnification circuit plate (16), screw thread gland (17) is fixed in the lower end of only revolving dividing plate (8), comprise pre-amplification circuit (18) from motion tracking magnification circuit plate (16), the input of pre-amplification circuit (18) connects the high impedance voltage signal of stacked piezoelectric sheet (13) output, the output of pre-amplification circuit (18) connects filter circuit (19), the output of filter circuit (19) is connected with driving amplifying circuit (20), drive amplifying circuit (20) and connect low input impedance variable-gain amplifying circuit (21), low input impedance variable-gain amplifying circuit (21) is connected with feedback circuit (22).
2. a kind of low-frequency sound wave laminated piezoelectric sensor according to claim 1, it is characterized in that: the output signal positive pole of described stacked piezoelectric sheet (13) is received the end from the IN of motion tracking magnification circuit plate (16) bipod socket J1, negative pole is received the common of J1, the IN end of J1 is input to the normal phase input end of operational amplifier U1, the normal phase input end of operational amplifier U1 inserts the negative electrode of diode D1 and the anode of D2, the other end of D1 and D2 is ground connection all, the operational amplifier inverting input connects output amplifying signal is outputed to electrochemical capacitor E4, electrochemical capacitor E4 and R9 connect and compose high-pass filtering circuit, its output connects the signal of low pass filter U2 and imports 8 pin, 3 pins of low pass filter U2 directly are connected with 4 pins, 1 pin of low pass filter U2 is connected with capacitor C 1, the 6 pin ground connection of low pass filter U2 also connect the other end of C1, output 5 pin of low pass filter U2 are connected to the normal phase input end of operational amplifier U3A, the inverting input of operational amplifier U3A connects output the signal that amplifying signal outputs to variable-gain amplifier U4 is imported 3 pin, 6 pins of variable-gain amplifier U4 connect-5V power supply and electrochemical capacitor E3 one end, electrochemical capacitor E3 other end ground connection, 8 pins of variable-gain amplifier U4 connect+5V power supply and electrochemical capacitor E2 one end, electrochemical capacitor E2 other end ground connection, 1 pin of variable-gain amplifier U4 connects the adjustable end of P1, the end ground connection of P1, the P1 other end connects+the 5V power supply by R1,5 pins of variable-gain amplifier U4 connect the OUT end that 7 pins are received amplifying signal output J2,7 pins of variable-gain amplifier U4 insert the negative electrode of R2 one end and D4, the R2 other end is exported to amplifying signal the inverting input of operational amplifier U5A, the positive input end grounding of operational amplifier U5A, the inverting input of operational amplifier U5A was connected R3 and was connect the negative electrode that the U5A output outputs to amplifying signal D3, a termination R4 one end of D3, a termination R5 one end of D4, the end of R5 and the other end of R4 are with the inverting input that meets operational amplifier U5B, the normal phase input end of operational amplifier U5B connects ground connection behind the R7, the inverting input of operational amplifier U5B connects output by R6, output termination R8 one end of operational amplifier U5B, another termination E1 one end of R8 and 2 pins of variable-gain amplifier U4, E1 other end ground connection, the voltage of the ten 5V termination DC-DC power modules of J2 is imported 1 pin, 6 pins and 7 pins of DC-DC power module export respectively+5V and-5V voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410026076.8A CN1236307C (en) | 2004-04-27 | 2004-04-27 | Low-frequency sound wave stacked piezo-electric transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410026076.8A CN1236307C (en) | 2004-04-27 | 2004-04-27 | Low-frequency sound wave stacked piezo-electric transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1570351A true CN1570351A (en) | 2005-01-26 |
| CN1236307C CN1236307C (en) | 2006-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200410026076.8A Expired - Fee Related CN1236307C (en) | 2004-04-27 | 2004-04-27 | Low-frequency sound wave stacked piezo-electric transducer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101034156B (en) * | 2007-01-25 | 2010-05-19 | 西安交通大学 | Piezoelectric infrasonic wave sensor capable of canceling mechanical oscillation signal |
| CN105181808A (en) * | 2015-10-10 | 2015-12-23 | 济南大学 | Front-emitting integrated sound emitting sensor and preparation method thereof |
| CN108027276A (en) * | 2015-09-30 | 2018-05-11 | 雅马哈株式会社 | Sensor unit and musical instrument |
| EA037631B1 (en) * | 2020-07-14 | 2021-04-23 | ОБЩЕСТВО С ОГРАНИЧЕННОЙ ОТВЕТСТВЕННОСТЬЮ "Тота Системс" | Method for determining physical values in a well based on piezoresonance sensors without electronics and a device for its implementation |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713766B (en) * | 2009-10-23 | 2012-06-06 | 西安华傲通讯技术有限责任公司 | Wide frequency response noise resistant adapterization probe adopting double piezoelectric ceramic wafers |
-
2004
- 2004-04-27 CN CN200410026076.8A patent/CN1236307C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101034156B (en) * | 2007-01-25 | 2010-05-19 | 西安交通大学 | Piezoelectric infrasonic wave sensor capable of canceling mechanical oscillation signal |
| CN108027276A (en) * | 2015-09-30 | 2018-05-11 | 雅马哈株式会社 | Sensor unit and musical instrument |
| US11346709B2 (en) | 2015-09-30 | 2022-05-31 | Yamaha Corporation | Sensor unit and musical instrument |
| CN105181808A (en) * | 2015-10-10 | 2015-12-23 | 济南大学 | Front-emitting integrated sound emitting sensor and preparation method thereof |
| CN105181808B (en) * | 2015-10-10 | 2017-03-29 | 济南大学 | The preparation method of integrated acoustic emission sensor is put before a kind of |
| EA037631B1 (en) * | 2020-07-14 | 2021-04-23 | ОБЩЕСТВО С ОГРАНИЧЕННОЙ ОТВЕТСТВЕННОСТЬЮ "Тота Системс" | Method for determining physical values in a well based on piezoresonance sensors without electronics and a device for its implementation |
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| Publication number | Publication date |
|---|---|
| CN1236307C (en) | 2006-01-11 |
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Granted publication date: 20060111 Termination date: 20100427 |