CN2247801Y - Liquid sound emission sensor - Google Patents
Liquid sound emission sensor Download PDFInfo
- Publication number
- CN2247801Y CN2247801Y CN 96200753 CN96200753U CN2247801Y CN 2247801 Y CN2247801 Y CN 2247801Y CN 96200753 CN96200753 CN 96200753 CN 96200753 U CN96200753 U CN 96200753U CN 2247801 Y CN2247801 Y CN 2247801Y
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- Prior art keywords
- sensor
- liquid
- utility
- model
- sensing element
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- Expired - Fee Related
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- 239000007788 liquid Substances 0.000 title claims abstract description 14
- 239000012530 fluid Substances 0.000 claims description 16
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 abstract description 7
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000008054 signal transmission Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 6
- 230000006854 communication Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model relates to a liquid sound emission sensor, which is used for the technology of cutting condition monitoring for cutters. The utility model comprises a casing; a liquid outlet and a liquid inlet are arranged on the casing, and piezoelectric sensing elements and a pre-amplifier are arranged inside a sensor. The piezoelectric sensing element and the pre-amplifier are combined to form a body. The utility model has the advantages of small size and convenient use. The sensor makes use of liquid as waveguide. The utility model has the characteristics of far distance of signal transmission, strong anti-interference ability, and no influence for the normal running of an object; the practicality of the cutting condition of the cutter in cutting process in the form of real-time online monitoring can be achieved.
Description
The utility model relates to a kind of sensor that is used for the cutting tool state monitoring technology.
Cutter galls the ingredient of the automatic monitoring of damage as high-speed automated system of processing, and real-time and reliability are extremely important.Stop process continually, detect cutting tool state and will greatly reduce process velocity, this has limited the application of direct method.Whether transducing signal reflects truly that the cutting state information of cutter is the important assurance of decision monitoring system success ratio or reliability, therefore, selects suitable sensing mode quite crucial.Sensing mode comprises acoustic-emission, current of electric method, vibration acceleration method etc., and these methods come with some shortcomings in application.Adopt surface contact as at present commercially available as calibrate AE sensor, and sensor separates use with prime amplifier, bring problems for picking up of acoustic emission signal: because the surface contacts with the use of sensor, acoustic emission signal route of transmission complexity, signal energy is lost greatly in the communication process, and distortion is serious; Inconvenience is installed; Can not directly measure the rotate-stationary mode object; Because sensor separates use with prime amplifier, is prone to high frequency interference, and the production cost height.
The purpose of this utility model is just for fear of the deficiency of above-mentioned prior art and a kind of liquid calibrate AE sensor that provides.This sensor mainly relies on liquid as the acoustic emission wave communication media, has solved the problems such as difficulty, signal to noise ratio (S/N ratio) is undesirable, sensitivity is low, distorted signals of installing and using that existing sensor exists in the working angles cutting tool state monitoring and detection.
The purpose of this utility model is realized by following concrete measure: comprise that fluid intake and spout are arranged respectively on sensor housing, the housing, piezoelectric sensing element and prime amplifier are housed in the sensor housing, piezoelectric sensing element in the sensor and prime amplifier constitute one, and utilize fluid as waveguide.
Below in conjunction with accompanying drawing the utility model is elaborated: Fig. 1 is sensor construction figure
The liquid calibrate AE sensor has metal shell 1, fluid intake 2, fluid spout 3.Sensor internal is divided into piezoelectric sensitivity chamber and prime amplifier two large divisions.Design has special acoustic energy concentrator and piezoelectric sensing element 4 in the piezoelectric sensitivity chamber.Prime amplifier 5 is designed to the miniature amplifier of high s/n ratio, high-gain.Piezoelectric sensing element 4 can be piezoelectric ceramics or piezoelectric crystal.Piezoelectric sensing element and prime amplifier constitute one in this programme, utilize fluid 6 as waveguide, and fluid bore 7 is arranged in the sensor.
This Design of Sensor principle is according to concentrating and the metal of abrupt release elastic wave or nonmetal, when being subjected to external force effect or oneself's ground abrupt release elastic wave, utilize the propagation waveguide of fluid as elastic wave, make elastic wave propagate into piezoelectric sensing element by fluid waveguide to this elastic wave sensitivity, elastic mechanical can be converted into electric energy, handle for subsequent conditioning circuit and use.This sensor is that to utilize piezoelectric sensing element in the fluid be that media induction acoustic signals picks up acoustic emission signal with the fluid.The two ends of piezoelectric sensing element as the two poles of the earth of piezoelectric sensing element, are drawn the input end of lead as signal output and prime amplifier with metallic film on the two poles of the earth.Any one-level in the two poles of the earth can be as the ground end or the signal end of prime amplifier.Sensor outer housing adopts metal to make, and increases the intensity of sensor self on the one hand, on the other hand the faint high-frequency signal of piezoelectric sensing element output is played the shielding action of high frequency interference to external world.For playing protection prime amplifier purpose; dividing wall of design between prime amplifier chamber and piezoelectric sensitivity chamber; give prime amplifier by fairlead with the voltage across poles of piezoelectric sensing element, then with the fairlead sealing, in order to avoid fluid flows in the piezoelectric sensitivity chamber.The fluid intake end has to connect uses screw thread, can connect with the fluid system pipeline.
The utility model is a kind of novel non-surperficial contact-type calibrate AE sensor, it utilizes the communication media of liquid as acoustic emission signal, rely on its inner special piezoelectric sensing element to pick up the acoustic emission wave that liquid is propagated, change the mechanical energy of ripple into electric energy, by the prime amplifier that is integrated in high s/n ratio in the sensor, high-gain the feeble signal of piezoelectric sensing element output is amplified again that to drive be 0 volt to 12 volts voltage signal, for follow-up secondary instrument use.This sensor also can be applied to any other and rely on the non-surperficial contact measurement of liquid as the acoustic emission signal communication media, can also be used to rely on liquid to measure as the mechanical vibration of signal communication media non-surface contact.This sensor can be installed in the loop endpiece by means of the cooling and lubricating system loop in lathe or the plant equipment, so can not have any impact to operate as normal.
Claims (2)
1. liquid calibrate AE sensor, an end that comprises sensor outer housing, sensor housing has fluid intake, and the other end has the fluid spout, and piezoelectric sensing element, prime amplifier are housed in the sensor outer housing, it is characterized in that waveguide is a fluid, piezoelectric sensing element and prime amplifier constitute one.
2. sensor as claimed in claim 1 is characterized in that piezoelectric sensing element can be a piezoelectric ceramics, can be piezoelectric crystal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96200753 CN2247801Y (en) | 1996-01-23 | 1996-01-23 | Liquid sound emission sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96200753 CN2247801Y (en) | 1996-01-23 | 1996-01-23 | Liquid sound emission sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2247801Y true CN2247801Y (en) | 1997-02-19 |
Family
ID=33887227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96200753 Expired - Fee Related CN2247801Y (en) | 1996-01-23 | 1996-01-23 | Liquid sound emission sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2247801Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109623655A (en) * | 2019-02-25 | 2019-04-16 | 长沙理工大学 | A kind of stone state in-situ monitor system and method |
| CN109702648A (en) * | 2019-02-25 | 2019-05-03 | 长沙理工大学 | In-situ monitoring system and method for grinding wheel load phenomenon |
-
1996
- 1996-01-23 CN CN 96200753 patent/CN2247801Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109623655A (en) * | 2019-02-25 | 2019-04-16 | 长沙理工大学 | A kind of stone state in-situ monitor system and method |
| CN109702648A (en) * | 2019-02-25 | 2019-05-03 | 长沙理工大学 | In-situ monitoring system and method for grinding wheel load phenomenon |
| CN109623655B (en) * | 2019-02-25 | 2020-10-13 | 长沙理工大学 | Grinding wheel working state in-situ monitoring system and method |
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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 |