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Ultrasonic-assisted high-sensitivity detection system for pollutants in fluid and its working method

A detection system, ultrasonic-assisted technology, applied in the analysis of gas mixtures, measuring devices, particle size analysis, etc., can solve the problems of poor consistency, poor precision, high price, etc., to improve the detection accuracy of the system, enhance the concentration of fine particles, and reliability Good results

Inactive Publication Date: 2018-11-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, mature pollutant detection sensors include semiconductor, electrochemical, optical, etc. Among them, semiconductor sensors have long life and low price, but have poor consistency and poor accuracy.
Electrochemical sensors have average accuracy and short life
Optical sensors are accurate but expensive

Method used

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  • Ultrasonic-assisted high-sensitivity detection system for pollutants in fluid and its working method
  • Ultrasonic-assisted high-sensitivity detection system for pollutants in fluid and its working method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] refer to figure 1, the ultrasonic transducer 1 is fixed and placed in the air environment with a bracket. When the excitation is applied to the electrode 2, the ultrasonic transducer 1 will generate vibration at the same frequency as the excitation, and the vibration will be amplified and transmitted through the acoustic radiation plate 3. A sound field is generated in layer 4, and the pollutants in the radiating layer are moved by the sound field and its generated acoustic flow and acoustic vibration, and gather in a fixed area. Then, the signal processing conversion device 7 collects the sensing signal in the sensor 6 and converts the signal into a signal recognized by the computer, and transmits it to the computer 8. Finally, the computer 8 calculates the corresponding position in the ultrasonic field according to the ratio formula of the detected concentration of pollutants and the actual concentration of pollutants Calculate the actual pollutant concentration and d...

Embodiment 2

[0037] refer to figure 2 , the ultrasonic transducer 1 is fixed and placed in the air environment with a bracket. When the excitation is applied to the electrode 2, the ultrasonic transducer 1 will generate vibration at the same frequency as the excitation, and the vibration will be amplified and transmitted through the acoustic radiation plate 3. The sound field is generated in the layer 4 and the sound field nodal plane 12 is formed. The fine particles in the radiation layer 4 are gathered near the sound field nodal plane 12 under the action of the acoustic radiation force, and then the laser emitting device 9 is placed so that the emitted laser can pass through the sound field nodal plane 12. At the position on the side of the radiation layer 4, the transmitted light receiving device 10 is arranged on the side corresponding to the laser emitting device 9, and the scattered light receiving device 13 is arranged in front of or behind the radiation layer. Then, the control and...

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Abstract

The invention discloses an ultrasonic assisting high-sensitivity detection system for pollutants in fluid and a working method of the ultrasonic assisting high-sensitivity detection system. The ultrasonic assisting high-sensitivity detection system comprises an ultrasonic transducer. The ultrasonic transducer is provided with electrodes, an acoustic radiation plate is fixedly arranged on the surface of the ultrasonic transducer, a reflection plate is arranged below the acoustic radiation plate, a radiation layer is formed between the acoustic radiation plate and the reflection plate, and a sensor is arranged at the radiation layer and connected with a computer through a signal processing conversion device. A laser irradiation device and a transmission light receiving device are symmetrically arranged on the left side and the right side outside the radiation layer, and a scattered light receiving device is arranged in the front of the radiation layer or on the back of the radiation layer. The laser irradiation device, the transmission light receiving device and the scattered light receiving device are connected with a control and information processing system. The system utilizes acoustic flow, acoustic radiation pressure and acoustic vibration produced by resonance of the ultrasonic transducer and can not damage components of the pollutants, the detection precision of the sensor and a laser fine particle detection device can be improved exponentially, cost is greatly reduced, and the detection precision is greatly improved.

Description

technical field [0001] The invention relates to a high-sensitivity detection system for pollutants in an ultrasonic auxiliary fluid and a working method thereof, in particular to a principle of collecting pollutants based on ultrasonic vibration of an ultrasonic transducer and the generated acoustic flow and sound radiation force, which belongs to ultrasonic field of application. Background technique [0002] With the development of industry and agriculture and the increase of motor vehicles, air and water pollution is becoming more and more serious. Air and water pollutants are complex, including heavy metals, bacteria, inhalable dust, pesticides and antibiotics. How to quickly and economically detect various pollutant components has become a difficult problem in environmental governance, and an efficient, low-cost, easy-to-implement and pollution-free detection method is urgently needed. [0003] At present, the mature pollutant detection sensors include semiconductor, e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00G01N15/06G01N15/02
CPCG01N15/0205G01N15/06G01N33/0004G01N2015/0693
Inventor 胡俊辉苏松飞彭榆善钟思恒
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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