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Ultrasonic sensor and preparation method and application thereof

A sensor and ultrasonic technology, applied in the field of sensors, can solve problems such as increased cost and complex sensor structure, and achieve the effect of improving measurement accuracy and eliminating the influence of air bubbles on sensor measurement

Pending Publication Date: 2020-12-22
DONGGUAN ZHENGYANG ELECTRONICS MECHANICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, the structure of the sensor is complicated and the cost increases

Method used

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  • Ultrasonic sensor and preparation method and application thereof
  • Ultrasonic sensor and preparation method and application thereof
  • Ultrasonic sensor and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]This embodiment provides an ultrasonic sensor, the transmitting / receiving surface and the reflecting surface of the ultrasonic sensor are both coated with a water-based acrylic resin (component: acrylic resin, content of 55.5%, water, content of 44.5%) with a thickness of 1 μm.

[0038]The specific preparation method is as follows: coating water-based acrylic resin on the transmitting / receiving surface and reflective surface of the ultrasonic sensor, and drying at 10°C for 40 minutes to obtain an ultrasonic sensor with both the transmitting / receiving surface and the reflective surface coated with water-based acrylic resin.

Embodiment 2-7

[0040]The difference from Example 1 is only that the thickness of the water-based acrylic resin is 5μm (Example 2), 10μm (Example 3), 30μm (Example 4), 50μm (Example 5), 60μm (Example 6) ), 70 μm (Example 7).

Embodiment 8

[0042]The difference from Example 3 is that the water-based acrylic resin on the transmitting / receiving surface and the reflective surface is replaced with water-based polyvinyl alcohol resin of the same thickness (composition: polyvinyl alcohol, content is 13.4%, water content is 86.6%) .

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Abstract

The invention relates to an ultrasonic sensor as well as a preparation method and application thereof. A transmitting / receiving surface and a reflecting surface of the ultrasonic sensor are coated with water-soluble resin layers. The transmitting / receiving surface and the reflecting surface of the ultrasonic sensor are coated with the water-soluble resin layers, although bubbles are still attachedto the transmitting / receiving surface and the reflecting surface coated with the water-soluble resin, the bubbles lose attachment points along with dissolution of the water-soluble resin in a urea solution, rise to the surface of a liquid level due to light weight and then are broken. Therefore, the bubbles can be quickly separated from the transmitting / receiving surface and the reflecting surface of the ultrasonic sensor, the influence of the bubbles on sensor measurement is eliminated, and the measurement precision is improved. And besides, the water-soluble resin layer only contains tracemetal elements, so that the industrial standard is met, and the sending and receiving of ultrasonic signals are not influenced.

Description

Technical field[0001]The invention relates to the technical field of sensors, in particular to an ultrasonic sensor and a preparation method and application thereof.Background technique[0002]When using an ultrasonic detector to detect the quality of a urea solution, it is often susceptible to air bubbles. When the urea solution is filled into the urea tank for the first time, a lot of bubbles will be generated in the urea solution. Because the sensor is dry before filling the urea solution, the bubbles are easy to adhere to the transmitter / receiving surface and reflection of the sensor It will not separate and dissipate for a long time, which will affect the measurement accuracy of the ultrasonic detector, making the detector unable to accurately measure the quality of the urea liquid.[0003]CN108535408A discloses a urea sensor protection assembly, which is used to protect at least one fluid sensor of a urea sensor system from bubbles and / or particles. In order to provide a urea sens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/02G01N29/32B01D19/00
CPCG01N29/02G01N29/32B01D19/00G01N2291/022G01N29/28G01N2291/02809G01N2291/101G01N2291/045G01N2291/0228F01N2610/02G01F23/2962G01N29/024G01N2291/02836
Inventor 顾一新梅红成
Owner DONGGUAN ZHENGYANG ELECTRONICS MECHANICAL CO LTD
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