CN2802732Y - On-line computer controller mounted on piezoelectric transducer - Google Patents
On-line computer controller mounted on piezoelectric transducer Download PDFInfo
- Publication number
- CN2802732Y CN2802732Y CN 200520102443 CN200520102443U CN2802732Y CN 2802732 Y CN2802732 Y CN 2802732Y CN 200520102443 CN200520102443 CN 200520102443 CN 200520102443 U CN200520102443 U CN 200520102443U CN 2802732 Y CN2802732 Y CN 2802732Y
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- piezoelectric transducer
- pzt
- oil cylinder
- piezoelectric
- assembled
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Abstract
The utility model discloses an on-line computer controller for piezoelectric transducers, which is provided with a piezoelectric transducer assembling machine, a voltmeter, an A/D converter, a computer, a servo motor, a pressure valve and a hydraulic pump which are orderly connected, wherein the piezoelectric transducer assembling machine is provided with a base of which the middle is provided with an oil cylinder which is fixed by screw bolts; the side surface of the oil cylinder is provided with an oil cylinder oil outlet pipe and an oil cylinder oil inlet pipe; the upper end of the oil cylinder is provided with a piezoelectric transducer to be assembled; both sides of the base are provided with stairway-shaped upright posts; both ends of each of the stairway-shaped upright posts and both ends of the piezoelectric transducer to be assembled are provided with movable pressing plates and upper pressing plates; the upper pressing plates are fixed on the stairway-shaped upright posts by minipads and nuts; the movable pressing plates and the side surface of the piezoelectric transducer are provided with guiding seats; the upper pressing plates and the upper end of the piezoelectric transducer to be assembled are provided with torque spanners which are respectively provided with a torque spanner oil inlet pipe and a torque spanner oil outlet pipe. The utility model has the advantages of high assembly precision, small frequency variation of the piezoelectric transducer, low impedance, stable capacitance, little possibility of separation and fragmentation of the piezoelectric transducer in use, etc.
Description
Technical field
The utility model relates to art of ultrasound, relates in particular to a kind of piezoelectric transducer assembly on-line computer control device.
Background technology
Along with rapid development of science and technology, intelligent ultrasonic devices such as ultrasonic bonding machine, ultrasonic cleaning, ultrasonic machine have obtained application more and more widely, and annual output all increases progressively fast in the speed with 15～20%.PZT (piezoelectric transducer) is the core devices of intelligent ultrasonic device, is a kind of efficient, high-power electro-acoustic transducing device.PZT (piezoelectric transducer) collection piezoelectric effect and inverse piezoelectric effect are all over the body, and the assembling process of PZT (piezoelectric transducer) is to realize the process of piezoelectric effect, and the use of PZT (piezoelectric transducer) is the process that realizes inverse piezoelectric effect.
The intelligence ultrasonic device to the requirement of PZT (piezoelectric transducer) is:
(1) physical dimension is little, and instantaneous output reaches 35～40w/cm
2, continuous power is 7～8w/cm
2, power is big, and according to wafer and the quantity of using different size, the power of PZT (piezoelectric transducer) is 100～2200w;
(2) heating is few under long-time continuous and intermittent duty, and acoustic loss is low;
(3) electro-acoustic conversion efficiency＞80%;
Can not unclamp when (4) PZT (piezoelectric transducer) is worked;
(5) piezoelectric ceramic piece can be not broken under the long-term work state;
(6) PZT (piezoelectric transducer) of same specification frequency high conformity when producing in batches;
(7) impedance is low, for the 2200W PZT (piezoelectric transducer) of 15kHz, and its impedance＜12 Ω;
(8) electric capacity is stable, and excursion is little.
But, owing to flatness, roughness and the depth of parallelism of the property complicated and changeable of ceramic material, distribution of particles inequality, sintering process complexity, PZT (piezoelectric transducer) components and parts radiating surface is difficult to a series of reasons such as control, pressure oscillation, make PZT (piezoelectric transducer) be difficult to reach above-mentioned requirements.Especially outstanding is, China's PZT (piezoelectric transducer) development and production unit use torque wrench assembling PZT (piezoelectric transducer), the torque ripple scope reaches 30～50Nm, the pressure oscillation scope reaches 3000～6000N, PZT (piezoelectric transducer) frequency range when causing producing in batches reaches 150～350Hz, the impedance variation scope reaches 3～6 Ω, the capacitance variations scope is 500～1200pf, performance in use, the PZT (piezoelectric transducer) electro-acoustic conversion efficiency is low, easily heating, and potsherd is easily broken, PZT (piezoelectric transducer) easily unclamps, PZT (piezoelectric transducer) and supersonic generator are difficult to problems such as coupling, and an above-mentioned difficult problem is badly in need of solving in PZT (piezoelectric transducer) production and application units.
Summary of the invention
The purpose of this utility model provides the piezoelectric transducer assembly on-line computer control device that a kind of quantity of electric charge is constant, assemble the high-performance PZT (piezoelectric transducer).
In order to achieve the above object, the utility model is taked following measures:
It has the PZT (piezoelectric transducer) assembly machine that is connected successively, voltmeter, A/D converter, computer, servomotor, pressure valve, hydraulic pump, the PZT (piezoelectric transducer) assembly machine has base, in the middle of base, be provided with oil cylinder, and by bolt, the oil cylinder side is provided with the oil cylinder flowline, the oil cylinder oil inlet pipe, the oil cylinder upper end is provided with PZT (piezoelectric transducer) to be assembled, be provided with the stairstepping column on the base both sides, be provided with moving press plate and top board at stairstepping column and PZT (piezoelectric transducer) two ends to be assembled, top board is fixed on the stairstepping column with minipad and nut, on moving press plate, be provided with guide holder with the PZT (piezoelectric transducer) side, be provided with torque wrench at top board and PZT (piezoelectric transducer) upper end to be assembled, on torque wrench, be provided with torque wrench oil inlet pipe and torque wrench flowline.
The utility model is compared the useful effect that has with background technology:
(1) judges the assembly quality of PZT (piezoelectric transducer) according to the quantity of electric charge;
(2) change the moment of torsion that is applied on the PZT (piezoelectric transducer) nut by computer control and detection system, realized the intellectuality and the automation of PZT (piezoelectric transducer) assembling;
(3) assembly precision height, the PZT (piezoelectric transducer) quantity of electric charge can be controlled in ± 3% in;
(4) PZT (piezoelectric transducer) resonance frequency excursion is 20～30Hz;
(5) PZT (piezoelectric transducer) impedance variation scope is 1～1.5 Ω;
(6) PZT (piezoelectric transducer) capacitance variations scope is 100～150pf;
Heating was few when (7) PZT (piezoelectric transducer) was worked;
(8) be difficult for during the PZT (piezoelectric transducer) long-term work broken and unclamp.
Computer control of PZT (piezoelectric transducer) assembly machine and detection system can be widely used in the PZT (piezoelectric transducer) Assembling Production and scientific research field of various difformities, different size.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is a piezoelectric transducer assembly on-line computer control device block diagram;
Fig. 2 is the utility model PZT (piezoelectric transducer) assembly machine structural representation, among the figure: torque wrench 1, torque wrench oil inlet pipe 2, nut 3, minipad 4, top board 5, torque wrench flowline 6, big pad 7, guide holder 8, column 9, PZT (piezoelectric transducer) 10, moving press plate 11, oil cylinder flowline 12, oil cylinder 13, bolt 14, oil cylinder oil inlet pipe 15, base 16;
Fig. 3 (a) is the utility model PZT (piezoelectric transducer) structural representation to be assembled, among the figure: nut 17, rear end cap 18, piezoelectric ceramic piece 19, electrode 20, front end housing 21;
Fig. 3 (b) is the utility model PZT (piezoelectric transducer) structure side view to be assembled;
Fig. 4 is the utility model computer control software flow chart.
Embodiment
As Fig. 1, shown in 2, the piezoelectric transducer assembly on-line computer control device has the PZT (piezoelectric transducer) assembly machine that is connected successively, voltmeter, A/D converter, computer, servomotor, pressure valve, hydraulic pump, the PZT (piezoelectric transducer) assembly machine has base 16, in the middle of base, be provided with oil cylinder 13, and it is fixing by bolt 14, the oil cylinder side is provided with oil cylinder flowline 12, oil cylinder oil inlet pipe 15, the oil cylinder upper end is provided with PZT (piezoelectric transducer) to be assembled 10, be provided with stairstepping column 9 on the base both sides, be provided with moving press plate 11 and top board 5 at stairstepping column and PZT (piezoelectric transducer) two ends to be assembled, top board is fixed on the stairstepping column with minipad 4 and nut 3, on moving press plate 11, be provided with guide holder 8 with the PZT (piezoelectric transducer) side, be provided with torque wrench 1 at top board and PZT (piezoelectric transducer) upper end to be assembled, on torque wrench, be provided with torque wrench oil inlet pipe 2 and torque wrench flowline 6.
As shown in Figure 3, PZT (piezoelectric transducer) has nut 17, rear end cap 18, piezoelectric ceramic piece 19, electrode 20, the front end housing 21 that is connected successively.
As shown in Figure 4, the computer control software flow process is as follows: in the assembling process, under the effect of torque wrench, piezoelectric ceramic piece is subjected to axial compressive force, produce electric charge, A/D converter is a digital signal with the quantity of electric charge (voltage) analog signal conversion, the voltage V after beginning that the comparison piezoelectric ceramic is actual to bear axial compressive force after the sampling
iWith setting voltage V
0
After entering voltage and increasing progressively subprogram, set a voltage incremental steps earlier, relatively V
0, V
iIf V
0＞V
i, then return voltage increases progressively subprogram, continues to increase progressively a voltage step size, relatively V
0, V
iIf V
0＜V
i, then begin to judge whether to satisfy | V
0-V
i|＜δ, wherein δ is an error amount of setting in advance.
If satisfy | V
0-V
i|＜δ, then continue to carry out following procedure, begin to calculate the piezoelectric ceramic pressure increment, then the calculated torque increment, calculate hydraulic system oil pressure increment at last, output control signals to servomotor, adjust pressure valve, increase the moment of torsion of hydraulic torque wrench, increase the pressure that is applied on the piezoelectric ceramic, increase the quantity of electric charge, thereby increase voltage, make PZT (piezoelectric transducer) reach designing requirement.
If do not satisfy | V
0-V
i|＜δ, then reduce the voltage incremental steps, reduce the voltage-regulation amplitude, continue to carry out voltage and increase progressively subprogram, judge whether to satisfy V
0＞V
iIf satisfy V
0＞V
i, then return voltage increases progressively subprogram; If do not satisfy V
0＞V
iThen continue to carry out following procedure, begin to calculate the piezoelectric ceramic pressure increment, then the calculated torque increment, calculate hydraulic system oil pressure increment at last, output control signals to servomotor, adjust pressure valve, increase the moment of torsion of hydraulic torque wrench, increase the pressure that is applied on the piezoelectric ceramic, increase the quantity of electric charge, thereby increase voltage, make PZT (piezoelectric transducer) reach designing requirement.
Before the PZT (piezoelectric transducer) assembling, under the effect of hydraulic pump, hydraulic oil enters oil cylinder 13 through oil cylinder oil inlet pipe 15, and piston moves up, and by moving press plate 11 PZT (piezoelectric transducer) 10, big pad 7 is withstood on top board 5 lower surfaces.Guide holder 8 is used for PZT (piezoelectric transducer) and leads in assembling process, prevents that each components and parts of PZT (piezoelectric transducer) are along transversion malposition.
At first PZT (piezoelectric transducer) two electrodes 20 inputs are inserted voltmeter.Under the effect of hydraulic pump, hydraulic oil footpath torque wrench oil inlet pipe 2 promotes torque wrench 1 and rotates, with torsional interaction on the nut of PZT (piezoelectric transducer) upper end.
In the assembling process, under the effect of torque wrench, piezoelectric ceramic piece is subjected to axial compressive force, produce electric charge, A/D converter is delivered to computer control system with quantity of electric charge signal, regulates pressure valve by servomotor, change hydraulic fluid pressure, and then change the moment of torsion that is applied on the PZT (piezoelectric transducer) nut.If the quantity of electric charge (voltage) is on the low side, increase the moment of torsion that is applied on the PZT (piezoelectric transducer) nut again, increase the pressure that applies on the piezoelectric ceramic piece; If the quantity of electric charge (voltage) is higher, then reduce to be applied to the moment of torsion on the PZT (piezoelectric transducer) nut, reduce the pressure that is applied on the piezoelectric ceramic piece.
Example: torque wrench minimal torque 80Nm, peak torque 1000Nm, precision ± 3%, hydraulic system working pressure 600bar, maximum stream flow 6.5L/min, hydraulic pump power source 4kw/380v.
Before the PZT (piezoelectric transducer) assembling, under the effect of hydraulic pump, hydraulic oil enters oil cylinder 13 through oil cylinder oil inlet pipe 15, and piston moves up, and by moving press plate 11 PZT (piezoelectric transducer) 10, big pad 7 is withstood on top board 5 lower surfaces.Guide holder 8 is used for PZT (piezoelectric transducer) and leads in assembling process, prevents that each components and parts of PZT (piezoelectric transducer) are along transversion malposition.At first PZT (piezoelectric transducer) two electrodes 20 inputs are inserted voltmeter.Under the effect of hydraulic pump, hydraulic oil footpath torque wrench oil inlet pipe 2 promotes torque wrench 1 and rotates, with torsional interaction on the nut of PZT (piezoelectric transducer) upper end.In the assembling process, under the effect of torque wrench, piezoelectric ceramic piece is subjected to axial compressive force, produce electric charge, A/D converter is delivered to computer control system with quantity of electric charge signal, regulates pressure valve by servomotor, change hydraulic fluid pressure, and then change the moment of torsion that is applied on the PZT (piezoelectric transducer) nut.If the quantity of electric charge (voltage) is on the low side, increase the moment of torsion that is applied on the PZT (piezoelectric transducer) nut again, increase the pressure that applies on the piezoelectric ceramic piece; If the quantity of electric charge (voltage) is higher, then reduce to be applied to the moment of torsion on the PZT (piezoelectric transducer) nut, reduce the pressure that is applied on the piezoelectric ceramic piece
Above-mentioned embodiment is used for the utility model of explaining; rather than the utility model limited; in the protection range of spirit of the present utility model and claim, any modification and change to the utility model is made all fall into protection range of the present utility model.
Claims (1)
1, a kind of piezoelectric transducer assembly on-line computer control device, it is characterized in that, it has the PZT (piezoelectric transducer) assembly machine that is connected successively, voltmeter, A/D converter, computer, servomotor, pressure valve, hydraulic pump, the PZT (piezoelectric transducer) assembly machine has base (16), in the middle of base, be provided with oil cylinder (13), and it is fixing by bolt (14), the oil cylinder side is provided with oil cylinder flowline (12), oil cylinder oil inlet pipe (15), the oil cylinder upper end is provided with PZT (piezoelectric transducer) to be assembled (10), be provided with stairstepping column (9) on the base both sides, be provided with moving press plate (11) and top board (5) at stairstepping column and PZT (piezoelectric transducer) two ends to be assembled, top board is fixed on the stairstepping column with minipad (4) and nut (3), go up and the PZT (piezoelectric transducer) side is provided with guide holder (8) at moving press plate (11), be provided with torque wrench (1) at top board and PZT (piezoelectric transducer) upper end to be assembled, on torque wrench, be provided with torque wrench oil inlet pipe (2) and torque wrench flowline (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520102443 CN2802732Y (en) | 2005-05-25 | 2005-05-25 | On-line computer controller mounted on piezoelectric transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520102443 CN2802732Y (en) | 2005-05-25 | 2005-05-25 | On-line computer controller mounted on piezoelectric transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2802732Y true CN2802732Y (en) | 2006-08-02 |
Family
ID=36847436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520102443 Expired - Lifetime CN2802732Y (en) | 2005-05-25 | 2005-05-25 | On-line computer controller mounted on piezoelectric transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2802732Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100355100C (en) * | 2005-05-25 | 2007-12-12 | 杭州电子科技大学 | Piezoelectric transducer assembly on-line computer control system |
| CN101776073A (en) * | 2010-03-12 | 2010-07-14 | 周重威 | Oil pump station for ultrahigh-pressure hydraulic wrench |
| CN104538547A (en) * | 2014-12-30 | 2015-04-22 | 西安工业大学 | Piezoelectric ceramic sensor oscillator |
| CN112045386A (en) * | 2020-09-01 | 2020-12-08 | 浙江大威超声波设备有限公司 | Small ultrasonic transducer assembling equipment |
-
2005
- 2005-05-25 CN CN 200520102443 patent/CN2802732Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100355100C (en) * | 2005-05-25 | 2007-12-12 | 杭州电子科技大学 | Piezoelectric transducer assembly on-line computer control system |
| CN101776073A (en) * | 2010-03-12 | 2010-07-14 | 周重威 | Oil pump station for ultrahigh-pressure hydraulic wrench |
| CN104538547A (en) * | 2014-12-30 | 2015-04-22 | 西安工业大学 | Piezoelectric ceramic sensor oscillator |
| CN104538547B (en) * | 2014-12-30 | 2017-06-30 | 西安工业大学 | Piezoceramic transducer oscillator |
| CN112045386A (en) * | 2020-09-01 | 2020-12-08 | 浙江大威超声波设备有限公司 | Small ultrasonic transducer assembling equipment |
| CN112045386B (en) * | 2020-09-01 | 2022-09-09 | 浙江大威超声波设备有限公司 | Small ultrasonic transducer assembling equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20071212 |
|
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20071212 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |