CN2061692U - Liquid optoacoustic sensor - Google Patents
Liquid optoacoustic sensor Download PDFInfo
- Publication number
- CN2061692U CN2061692U CN 90203808 CN90203808U CN2061692U CN 2061692 U CN2061692 U CN 2061692U CN 90203808 CN90203808 CN 90203808 CN 90203808 U CN90203808 U CN 90203808U CN 2061692 U CN2061692 U CN 2061692U
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Abstract
The utility model provides a new liquid optoacoustic sensor, which takes a quartz rod as the acoustic waveguide material and can be directly inserted in the samples of the acid liquid, the alkaline liquid and the high temperature (poikilothermal) liquid for measuring the photoacoustic signal. The utility model adopts the composite waveguide layer combined by an aluminium waveguide layer and a quartz waveguide rod, which can regulate the thickness of the aluminum layer of the composite waveguide layer according to different liquid test samples for obtaining the optimum acoustic coupling coefficient. The detectivity obtained by the utility model reaches the absorbance of 10+[-8]cm+[-1] order of magnitude.
Description
The utility model belongs to the improvement of photoacoustic sensors.
In optoacoustic spectroscopy research, highly sensitive photoacoustic sensors is the key point of photo-acoustic spectrometer, and its performance, characteristics have determined the function and application scope of photo-acoustic spectrometer.For the photo-acoustic detection of fluid sample,, fail to develop desirable liquid photoacoustic sensors because the acoustic resistance of photoacoustic sensors and fluid sample is equipped with and problem such as Acidity of Aikalinity liquid assay always.Known have a nautical receiving set formula photoacoustic sensors (Tam, A.C.and C.K.N.Patel, Appl.Opt., 18,3348,1979), this sensor is to be installed on the sample pool wall to survey the photoacoustic signal that liquid produces, though this kind device adopts stainless steel outer sleeve, is difficult to use in the mensuration of acid, alkalescence and alternating temperature (particularly high temperature sample) fluid sample, and exist specimen to change difficulty, problems such as easy pollution.Another kind photoacoustic sensors (Anal.Chem., 50,865,1978; 51,686,1979; Shanghai Tian Silang etc.), adopt piezoelectric ceramic tube tracer liquid sample,, piezoelectric ceramic tube is polluted, can not be used for the mensuration of acid, akaline liquid and high cryogenic liquid sample because specimen is placed in the piezoelectric ceramic tube, and poor practicability.
The purpose of this utility model is to provide a kind of new liquid photoacoustic sensors, make it to be applicable to the mensuration of the fluid sample of acid, alkalescence and different temperatures, satisfy the analysis of samples such as chemistry, biology, medical science, environmental science, and have highly sensitive, easy to use, clean easily, do not have advantages such as the pollution of hysteresis.
The liquid photoacoustic sensors that the utility model proposes is characterized in that it is by shell, the Plumbum absorption layer, and the aluminium ducting layer, piezoelectric ceramic wafer and quartz waveguide rod are formed.
The utility model adopts the quartz waveguide rod as the acoustic duct material, can directly insert and carry out photoacoustic signal mensuration in acid, alkalescence and the high cryogenic liquid sample.In the measurement, the optoacoustic elastic heat wave that liquid produces incides the quartz waveguide plane rod end, is transferred to the piezoelectric ceramic wafer as inverting element then, produces electric signal output.Adopt this waveguide post directly to insert in the testing liquid, avoided the influence of parasitic light sensor, easy to use, clean easily pollution-free hysteresis phenomenon.
Feature of the present utility model also is, adopts the composite waveguide layer of being made up of the aluminium ducting layer of quartz waveguide rod and acoustic resistance coupling.When measuring, can regulate the thickness of composite waveguide layer aluminium lamination according to different specimen, reaching best acoustic coupling coefficient and higher detection sensitivity, the liquid photoacoustic sensors that the utility model is designed, its detection sensitivity can reach 10
-8Cm
-1The absorbance of the order of magnitude.
In the liquid testing, because the influences such as reflection of sound wave, make the photoacoustic signal wave form distortion, sensitivity reduces.At this problem, the utility model adopts the big metallic lead of acoustic attenuation coefficient as acoustic absorbing layer, makes by behind the piezoelectric ceramic wafer (inverting element), and the sound wave that enters absorption layer no longer includes possibility reflected back inverting element.
The utility model adopts the inverting element of the big lead titanate piezoelectric ceramics wafer of electromechanical coupling factor and piezoelectric modulus as sensor.Its assembling suitably, the sensitivity that can improve sensor.
Accompanying drawing is the liquid sensor structural representation, and in the drawings, 1 is shell, and 2 is the Plumbum absorption layer, and 3 is the aluminium ducting layer, and 4 is joint, and 5 is spring, and 6 is piezoelectric ceramic wafer, and 7 is the quartz waveguide rod.
Embodiment
Adopt the utility model to measure trace Nd in the liquid
3+, Ho
3+, benzene and thiacyclohexane etc., obtained satisfied result.
Claims (2)
1, a kind of liquid photoacoustic sensors, of the present utility model being characterised in that: it is made up of shell, Plumbum absorption layer, aluminium ducting layer, piezoelectric ceramic wafer and quartz waveguide rod.
2, liquid photoacoustic sensors according to claim 1, it is characterized in that: both form composite waveguide layer aluminium ducting layer and quartz waveguide rod, can regulate the thickness of aluminium lamination according to the different liquids specimen, to reach best acoustic coupling coefficient and higher detection sensitivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90203808 CN2061692U (en) | 1990-03-28 | 1990-03-28 | Liquid optoacoustic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90203808 CN2061692U (en) | 1990-03-28 | 1990-03-28 | Liquid optoacoustic sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2061692U true CN2061692U (en) | 1990-09-05 |
Family
ID=4884928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90203808 Withdrawn CN2061692U (en) | 1990-03-28 | 1990-03-28 | Liquid optoacoustic sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2061692U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489797A (en) * | 2018-11-20 | 2019-03-19 | 西北工业大学 | A kind of corrosion-and high-temp-resistant sonic transducer, sound field measure system and method |
| CN109506770A (en) * | 2018-11-20 | 2019-03-22 | 西北工业大学 | Sound field detection method and device with tracking high temperature solid liquid interface function |
| CN109506771A (en) * | 2018-11-20 | 2019-03-22 | 西北工业大学 | With the sound field detection method and device of spatialization function in high-temp liquid medium |
| CN109506769A (en) * | 2018-11-20 | 2019-03-22 | 西北工业大学 | Sound field measuring method in liquid medium under the conditions of one kind is extraordinary |
| CN109506768A (en) * | 2018-11-20 | 2019-03-22 | 西北工业大学 | Sound field detection method and system in high temperature solid-liquid two-phase environment with temperature protection |
| US11596313B2 (en) * | 2017-10-13 | 2023-03-07 | Arizona Board Of Regents On Behalf Of Arizona State University | Photoacoustic targeting with micropipette electrodes |
| US11768182B2 (en) | 2019-04-26 | 2023-09-26 | Arizona Board Of Regents On Behalf Of Arizona State University | Photoacoustic and optical microscopy combiner and method of generating a photoacoustic image of a sample |
| US11975327B2 (en) | 2020-06-15 | 2024-05-07 | Arizona Board Of Regents On Behalf Of Arizona State University | Integrated container adapter for photoacoustic microscopy |
-
1990
- 1990-03-28 CN CN 90203808 patent/CN2061692U/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11596313B2 (en) * | 2017-10-13 | 2023-03-07 | Arizona Board Of Regents On Behalf Of Arizona State University | Photoacoustic targeting with micropipette electrodes |
| CN109489797A (en) * | 2018-11-20 | 2019-03-19 | 西北工业大学 | A kind of corrosion-and high-temp-resistant sonic transducer, sound field measure system and method |
| CN109506770A (en) * | 2018-11-20 | 2019-03-22 | 西北工业大学 | Sound field detection method and device with tracking high temperature solid liquid interface function |
| CN109506771A (en) * | 2018-11-20 | 2019-03-22 | 西北工业大学 | With the sound field detection method and device of spatialization function in high-temp liquid medium |
| CN109506769A (en) * | 2018-11-20 | 2019-03-22 | 西北工业大学 | Sound field measuring method in liquid medium under the conditions of one kind is extraordinary |
| CN109506768A (en) * | 2018-11-20 | 2019-03-22 | 西北工业大学 | Sound field detection method and system in high temperature solid-liquid two-phase environment with temperature protection |
| US11768182B2 (en) | 2019-04-26 | 2023-09-26 | Arizona Board Of Regents On Behalf Of Arizona State University | Photoacoustic and optical microscopy combiner and method of generating a photoacoustic image of a sample |
| US11975327B2 (en) | 2020-06-15 | 2024-05-07 | Arizona Board Of Regents On Behalf Of Arizona State University | Integrated container adapter for photoacoustic microscopy |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |