CN2140079Y - Vibration bar driving by piezoelectric crystal - Google Patents
Vibration bar driving by piezoelectric crystal Download PDFInfo
- Publication number
- CN2140079Y CN2140079Y CN 92236444 CN92236444U CN2140079Y CN 2140079 Y CN2140079 Y CN 2140079Y CN 92236444 CN92236444 CN 92236444 CN 92236444 U CN92236444 U CN 92236444U CN 2140079 Y CN2140079 Y CN 2140079Y
- Authority
- CN
- China
- Prior art keywords
- vibration
- bar
- shakes
- vibration bar
- piezoelectric crystal
- 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 - Lifetime
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Abstract
The utility model relates to a vibration bar driving by a piezoelectric crystal, comprising a vibration source and a vibration rod, wherein, primary structure is that the vibration bar adopts pipe and stick composition structure. The external part is a pipe material (5). The pipe inside is provided with a metal vibration stick (7) with definite flexibility, a driving crystal (4) and a detection crystal (9) welded on a vibration bar seat (3). A semicircular groove (8) is arranged at the bottom of a vibration bar (7). The vibration bar driving by piezoelectric crystal made according to design motif of the utility model is controlled by signal and vibrates on a certain frequency. The vibration bar driving by piezoelectric crystal is especially suitable for the control of a granular or a powdery solid material.
Description
The utility model is about the improvement of solid material control instrument invention, is specially adapted to the material level control of solid granular such as cement, flour, paddy, granulated sugar or powder.
Known UZK blocking rotary type charge level controller has the metal leaf that adopts revolution to be used for detecting material level, when leaf is run into material level, the rotation of leaf is obstructed, motor overload makes testing agency's work, thereby output control signal, because control output and testing agency are communicated with, serviceability temperature and control inflammable at some, explosive material level have been limited, what adopt in addition is the mechanical rotation mode, when output signal, motor is in overload, has limited its mission life, and the detection leaf is easily impaired, sensitivity is low.
In known technology, another UYK-1 type condenser type charge level controller then is a principle of utilizing medium different with dielectric constant of air, after material is run into the electric capacity probe, because the variation of specific inductive capacity, cause the variation of electric capacity between probe and chamber wall, inner CR oscillation circuit is started or failure of oscillation, thereby reach the purpose of control signal output, because variation of temperature, the specific inductive capacity of tested material changes, thereby influence control accuracy, inflammable at some in addition, explosive occasion does not allow the existence of static charge, so limited its usable range, and serviceability temperature is narrower, only-20 uses between ℃-60 ℃.
In view of the deficiency that known technology exists, it is extensive that the purpose of this utility model aims to provide a kind of usable range, and temperature range can be at-40 ℃ of-150 ℃ of occasions charge level controller of operate as normal all.
The utility model is finished as follows, adopt piezoelectric chip as vibration source, and vibration source and vibrating arm are isolated fully, wafer is fixedly mounted on the rod base that shakes, and the bar that shakes is the excellent unitized construction of pipe, and the outside is the tubular structure pipe, inside is the rod that shakes, for guaranteeing the rod starting of oscillation under certain frequency of shaking, make the bar that shakes reach certain amplitude, on the bar that shakes, be provided with semi-circular recesses.This groove is located at the bottom of the bar that shakes.The wafer of vibration source of the present utility model includes as the actuated wafer of vibration source with as the detection wafer that detects vibrational state.
The utility model is compared with known technology, have that volume is little, easy for installation, detection sensitivity is high, no-movable part, reliable operation, and not influenced by the physics of tested material and chemical property, is the desirable solid particle and the material apparatus for automatic control of powder.
The utility model has following accompanying drawing.
Fig. 1 is a structure principle chart of the present utility model
Accompanying drawing has been represented structure of the present utility model and embodiment, describes the relevant details of embodiment below more in conjunction with the accompanying drawings.
In conjunction with the accompanying drawings 1, wafer (4) and (9) are fixedly mounted on that the rod base that shakes (3) is gone up, the bar that shakes for the excellent unitized construction of pipe, outside for tubing (5), innerly be the metal type rod (7) that shakes, and be provided with semi-circular recesses (8) in the bottom of the rod that shakes (7), this semi-circular recesses (8) is to keep shaking the flexibility of rod (7), guarantee resonance under a certain frequency, and piezoelectric chip include as vibration source actuated wafer (4) and as the detection wafer (9) that detects vibrational state.1 for drawing lead among the figure, 2 is joint, its principle of work is that the rod-type charge level controller that shakes is made up of shake bar assembly and electronic package two parts, the bar assembly that shakes vibrates on a certain intrinsic resonance frequency under the piezoelectric ceramics excitation, this natural frequency feeds back to electron-amplifier simultaneously, make amplifier be operated in a certain state, when the vibration of bar that shakes is subjected to damping, feeds back to the signal weakening of amplifier, the bar that shakes stops vibration.Pressing the material level vibrating arm of the utility model design motif made, is industry or food department solid granular or granular material ideal control instruments such as cement, flour, granulated sugar, milk powder, washing powder, plastic pellet, wood chip, wheat, paddy.
Claims (3)
1, a kind of piezoelectric chip excited vibration bar, include vibration source and vibrating arm, vibration source and vibrating arm are isolated fully, it is characterized in that wafer (4) and (9) and the rod base fixed installation of shaking, the bar that shakes is the excellent unitized construction of pipe, the outside is tubing (5), is the bar that shakes (7) in the pipe, and is provided with semi-circular recesses (8) on the bar that shakes.
2, piezoelectric chip excited vibration bar as claimed in claim 1 is characterized in that semi-circular recesses (8) is located at the bottom of the bar that shakes (7).
3, piezoelectric chip excited vibration bar as claimed in claim 1, it is characterized in that being connected wafer on the stainless steel vibrating pole base (3) include as vibration source actuated wafer (4) and as the detection wafer (9) that detects vibrational state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92236444 CN2140079Y (en) | 1992-09-25 | 1992-09-25 | Vibration bar driving by piezoelectric crystal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92236444 CN2140079Y (en) | 1992-09-25 | 1992-09-25 | Vibration bar driving by piezoelectric crystal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2140079Y true CN2140079Y (en) | 1993-08-11 |
Family
ID=33777977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92236444 Expired - Lifetime CN2140079Y (en) | 1992-09-25 | 1992-09-25 | Vibration bar driving by piezoelectric crystal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2140079Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103192293A (en) * | 2013-03-17 | 2013-07-10 | 苏州科技学院 | Method for measuring vibration performance of tool nose of micro-milling tool |
| CN114345264A (en) * | 2022-01-28 | 2022-04-15 | 南京工程学院 | Non-contact type microparticle control device |
-
1992
- 1992-09-25 CN CN 92236444 patent/CN2140079Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103192293A (en) * | 2013-03-17 | 2013-07-10 | 苏州科技学院 | Method for measuring vibration performance of tool nose of micro-milling tool |
| CN114345264A (en) * | 2022-01-28 | 2022-04-15 | 南京工程学院 | Non-contact type microparticle control device |
| CN114345264B (en) * | 2022-01-28 | 2023-04-07 | 南京工程学院 | Non-contact type microparticle control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |