Ultrasonic Sensor and Preparation Method and Application Thereof

Abstract

The present disclosure discloses an ultrasonic sensor and a preparation method and application thereof. A transmitting surface or a -receiving surface is coated with a water-soluble resin layer, and a reflecting surface of the ultrasonic sensor is coated

Claims

1. An ultrasonic sensor, wherein a transmitting surface or a receiving surface is coated with a water-soluble resin layer, and a reflecting surface of the ultrasonic sensor is coated with a water-soluble resin layer.

2. The ultrasonic sensor as claimed in claim 1, wherein the water-soluble resin comprises any one or a combination of at least two of aqueous acrylic resin, water-soluble polyvinyl alcohol resin, aqueous polyurethane resin, aqueous modified polybutadiene resin or polyethylene oxide resin.

3. The ultrasonic sensor as claimed in claim 1, wherein dissolution time of each of the water-soluble resin layers in urea solution is 3-10 min.

4. The ultrasonic sensor as claimed in claim 1, wherein thickness of each of the water-soluble resin layers is 10-50 .Math.m.

5. A method for preparing the ultrasonic sensor as claimed in claim 1-4, comprising: spraying water-soluble resin on a transmitting surface and a reflecting surface of the ultrasonic sensor, and drying to obtain an ultrasonic sensor that’s the transmitting surface and the reflecting surface are both coated with a water-soluble resin layer, or spraying water-soluble resin on a receiving surface and a reflecting surface of the ultrasonic sensor, and drying to obtain an ultrasonic sensor whose the receiving surface and the reflecting surface are both coated with a water-soluble resin layer.

6. The method as claimed in claim 5, wherein drying temperature is 20-40° C. .

7. The method as claimed in claim 5, wherein drying time is 10-45 min.

8. An application of the ultrasonic sensor as claimed in claim 1-4, wherein the ultrasonic sensor is configured to detect a urea solution.

9. A method for using the ultrasonic sensor as claimed in claim 1-4, comprising: placing the ultrasonic sensor in a urea tank, and filling a urea solution to dissolve a water-soluble resin layer in the ultrasonic sensor.

10. The method as claimed in claim 9, wherein filling volume of the urea solution is 20-40% of the volume of the urea tank.

11. The ultrasonic sensor as claimed in claim 2, wherein the water-soluble resin comprises any one or a combination of aqueous acrylic resin and polyvinyl alcohol resin.

12. The ultrasonic sensor as claimed in claim 3, wherein the dissolution time of the each of the water-soluble resin layers in the urea solution is 5-10 min.

13. The ultrasonic sensor as claimed in claim 3, wherein concentration of the urea solution is 32.5%.

14. The method as claimed in claim 5, wherein the water-soluble resin comprises any one or a combination of at least two of aqueous acrylic resin, water-soluble polyvinyl alcohol resin, aqueous polyurethane resin, aqueous modified polybutadiene resin or polyethylene oxide resin.

15. The method as claimed in claim 14, wherein the water-soluble resin comprises any one or a combination of aqueous acrylic resin and polyvinyl alcohol resin.

16. The method as claimed in claim 10, wherein the filling volume of the urea solution is 30% of the volume of the urea tank.

17. The method as claimed in claim 10, wherein filling time of the urea solution is 1-5 min.

18. The method as claimed in claim 10, wherein dissolution time of the water-soluble resin layer is ≥filling time of the urea solution.

19. The method as claimed in claim 10, wherein dissolution time of the water-soluble resin layer is 3-10 min.

20. The method as claimed in claim 19, wherein dissolution time of the water-soluble resin layer is 5-10 min.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 is a schematic diagram of an ultrasonic sensor provided in a specific implementation mode of the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In view of the deficiencies of the related art, one of the objects of the present disclosure is to provide an ultrasonic sensor, in particular to an ultrasonic sensor for detecting the quality of a urea solution. The ultrasonic sensor may automatically detach bubbles from a transmitting/receiving surface and a reflecting surface, which ensures the detection precision of the sensor, and does not require a complicated preparation process and is low in cost.

[0027] In order to achieve this object, an embodiment of the present disclosure adopts the following technical solution.

[0028] The embodiment of the present disclosure provides an ultrasonic sensor, a transmitting/receiving surface and a reflecting surface of the ultrasonic sensor are both coated with a water-soluble resin layer.

[0029] In the present disclosure, the specific types of the water-soluble resin layers on the transmitting/receiving surface and the reflecting surface may be the same or different.

[0030] Due to the structure of the ultrasonic sensor, the transmitting/receiving surface is a surface emitting ultrasonic waves, and after being transmitted to the reflecting surface, the ultrasonic waves are reflected back to the transmitting/receiving surface, and the transmitting/receiving surface has both transmitting and receiving functions, and is therefore referred to as the transmitting/receiving surface in the field.

[0031] In the present disclosure, since the transmitting/receiving surface and the reflecting surface of the ultrasonic sensor are both coated with the water-soluble resin layer, although there are still bubbles attached to the transmitting/receiving surface and the reflecting surface coated with water-soluble resin in the process of adding a urea solution, as the water-soluble resin is dissolved in the urea solution, the bubbles lose their attachment points, rise to the surface of the liquid due to the light weight thereof, and then burst. Thus, the bubbles are rapidly detached from the transmitting/receiving surface and the reflecting surface of the ultrasonic sensor so as to eliminate the influence of the bubbles on the measurement of the sensor, thereby improving the measurement precision.

[0032] In addition, the water-soluble resin layer has only trace metal elements, which meets the industry standard and does not affect the sending and reception of ultrasonic signals.

[0033] In some embodiments, the transmitting/receiving surface and the reflecting surface are both made of stainless steel.

[0034] In some embodiments, the water-soluble resin may include any one or a combination of at least two of aqueous acrylic resin, water-soluble polyvinyl alcohol resin, aqueous polyurethane resin, aqueous modified polybutadiene resin or polyethylene oxide resin. In some embodiments, the water-soluble resin may include any one or a combination of aqueous acrylic resin and polyvinyl alcohol resin.

[0035] In some embodiments, dissolution time of each of the water-soluble resin layers in urea solution is 3-10 min, for example, 4 min, 5 min, 6 min, 7 min, 8 min, 9 min, etc.. In some embodiments, the dissolution time of the each of the water-soluble resin layers in the urea solution is 5-10 min.

[0036] In a preferred technical solution of the present disclosure, in order to ensure proper use of the ultrasonic sensor, the water-soluble resin needs to be rapidly and completely dissolved after the first filling of the urea solution is completed, preferably in 3-10 min. Rapid dissolution after the first filling of the urea solution is completed is ensured, without affecting the detection of the urea solution by the sensor after the filling is completed. If the dissolution time is too long, the undissolved resin layer may affect the normal operation of the sensor. If the resin layer is completely dissolved before the first filling of the urea solution is completed, re-adsorption of the bubbles on the transmitting/receiving surface and reflecting surface may be caused.

[0037] In some embodiments, concentration of the urea solution is 32.5%.

[0038] In some embodiments, the thickness of the water-soluble resin layer is 10-50 .Math.m, for example, 11 .Math.m, 12 .Math.m, 13 .Math.m, 14 .Math.m, 15 .Math.m, 16 .Math.m, 17 .Math.m, 18 .Math.m, 19 .Math.m, 20 .Math.m, 21 .Math.m, 22 .Math.m, 23 .Math.m, 24 .Math.m, 25 .Math.m, 26 .Math.m, 27 .Math.m, 28 .Math.m, 29 .Math.m, 30 .Math.m, 31 .Math.m, 32 .Math.m, 33 .Math.m, 34 .Math.m, 35 .Math.m, 36 .Math.m, 37 .Math.m, 38 .Math.m, 39 .Math.m, 40 .Math.m, 41 .Math.m, 42 .Math.m, 43 .Math.m, 44 .Math.m, 45 .Math.m, 46 .Math.m, 47 .Math.m, 48 .Math.m, 49 .Math.m, etc.

[0039] In a preferred technical solution of the present disclosure, it is ensured that the water-soluble resin layer has a suitable dissolution time by setting thickness of each of the resin layers to 10-50 .Math.m.

[0040] In a specific implementation mode of the present disclosure, the structure of the ultrasonic sensor is shown in FIG. 1.

[0041] A second object of an embodiment of the present disclosure is to provide a method for preparing the ultrasonic sensor as described in one of the objects. The method includes that: [0042] water-soluble resins are sprayed on a transmitting surface and a reflecting surface of an ultrasonic sensor, and the water-soluble resins are dried to obtain an ultrasonic sensor that’s the transmitting surface and the reflecting surface are both coated with a water-soluble resin layer, or [0043] water-soluble resins are sprayed on a receiving surface and a reflecting surface of an ultrasonic sensor, and the water-soluble resins are dried to obtain an ultrasonic sensor whose the receiving surface and the reflecting surface are both coated with a water-soluble resin layer.

[0044] In some embodiments, drying temperature is 20-40° C., for example, 21° C., 22° C., 23° C., 24° C., 25° C., 26° C., 27° C., 28° C., 29° C., 30° C., 31° C., 32° C., 33° C., 34° C., 35° C., 36° C., 37° C., 38° C., 39° C., etc.

[0045] In some embodiments, drying time is 10-45 min, for example, 11 min, 12 min, 13 min, 14 min, 15 min, 16 min, 17 min, 18 min, 19 min, 20 min, 21 min, 22 min, 23 min, 24 min, 25 min, 26 min, 27 min, 28 min, 29 min, 30 min, 31 min, 32 min, 33 min, 34 min, 35 min, 36 min, 37 min, 38 min, 39 min, 40 min, 41 min, 42 min, 43 min, 44 min, etc.

[0046] A third object of an embodiment of the present disclosure is to provide an application of the ultrasonic sensor as described in one of the objects. The ultrasonic sensor is configured to detect a urea solution.

[0047] A fourth object of the present disclosure is to provide a using method of the ultrasonic sensor as described in one of the objects. The using method includes that: the ultrasonic sensor is placed in a urea tank, and a urea solution is filled to dissolve a water-soluble resin layer in the ultrasonic sensor.

[0048] In some embodiments, filling volume of the urea solution is 20-40% of the volume of the urea tank, for example, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, etc.. In some embodiments, the filling volume of the urea solution is 30%.

[0049] In some embodiments, filling time of the urea solution is 1-5 min, for example, 1 min, 2 min, 3 min, 4 min, etc.

[0050] In some embodiments, dissolution time of the water-soluble resin layer is ≥filling time of the urea solution.

[0051] In a preferred technical solution of the present disclosure, in order to ensure proper use of the ultrasonic sensor, the water-soluble resin needs to be rapidly and completely dissolved after the first filling of the urea solution is completed, preferably in 3-10 min. Rapid dissolution after the first filling of the urea solution is completed is ensured, without affecting the detection of the urea solution by the sensor after the filling is completed. If the dissolution time is too long, the undissolved resin layer may affect the normal operation of the sensor. If the resin layer is completely dissolved before the first filling of the urea solution is completed, re-adsorption of the bubbles on the transmitting/receiving surface and reflecting surface may be caused.

[0052] In some embodiments, dissolution time of the water-soluble resin layer is 3-10 min. In some embodiments, the dissolution time of the water-soluble resin layer is 5-10 min.

[0053] Compared to the related art, the present disclosure has the following beneficial effects.

[0054] In the present disclosure, since the transmitting/receiving surface and the reflecting surface of the ultrasonic sensor are both coated with the water-soluble resin layer, although there are still bubbles attached to the transmitting/receiving surface and the reflecting surface coated with the water-soluble resin, as the water-soluble resin is dissolved in the urea solution, the bubbles lose their attachment points, rise to the surface of the liquid due to the light weight thereof, and then burst. Thus, the bubbles are rapidly detached from the transmitting/receiving surface and the reflecting surface of the ultrasonic sensor so as to eliminate the influence of the bubbles on the measurement of the sensor, thereby improving the measurement precision.

[0055] In addition, the water-soluble resin layer has only trace metal elements, which meets the industry standard and does not affect the sending and reception of ultrasonic signals.

[0056] In order to facilitate an understanding of the present disclosure, the following embodiments are set forth. It should be understood by those skilled in the art that the embodiments are only used to help the understanding of the present disclosure and should not to be construed as limiting the present disclosure.

Embodiment 1

[0057] The embodiment provides an ultrasonic sensor. A transmitting/receiving surface and a reflecting surface are both coated with an aqueous acrylic resin having a thickness of 1 .Math.m (compositions: 55.5% of acrylic resin and 44.5% of water).

[0058] A specific preparation method is as follows: the aqueous acrylic resins are coated on the transmitting/receiving surface and the reflecting surface of the ultrasonic sensor, and dried at 10° C. for 40 min to obtain the ultrasonic sensor whose transmitting/receiving surface and reflecting surface are both coated with a water-soluble resin layer.

Embodiments 2-7

[0059] The only difference from Embodiment 1 is that the thickness of the aqueous acrylic resin is 5 .Math.m (Embodiment 2), 10 .Math.m (Embodiment 3), 30 .Math.m (Embodiment 4), 50 .Math.m (Embodiment 5), 60 .Math.m (Embodiment 6), 70 .Math.m (Embodiment 7), respectively.

Embodiment 8

[0060] The difference from Embodiment 3 is that the aqueous acrylic resin on the transmitting/receiving surface and the reflecting surface is replaced with aqueous polyvinyl alcohol resin of the same thickness (compositions: 13.4% of polyvinyl alcohol and 86.6% of water).

Embodiments 9-11

[0061] The only difference from Embodiment 8 is that the thickness of the aqueous polyvinyl alcohol resin is 20 .Math.m (Embodiment 9), 30 .Math.m (Embodiment 10), 50 .Math.m (Embodiment 11), respectively.

Comparative Embodiment 1

[0062] The difference from Embodiment 1 is that the transmitting/receiving surface and the reflecting surface of the ultrasonic sensor are not coated with a water-soluble resin layer.

Performance Test

[0063] The ultrasonic sensor prepared in the above embodiments and comparative embodiments was placed in a urea tank, and a urea solution having a concentration of 32.5% was filled to 30% of the volume of the urea tank for 5 min.

[0064] The dissolution time of the water-soluble resin layer was observed and recorded.

[0065] The change of bubbles on the transmitting/receiving layer and the reflecting layer in the process of filling the urea solution was observed, and the bubbles at 0 min (the beginning of filling of the urea solution), 5 min (the end of filling of the urea solution) and 10 min (standing for 5 min after filling of the urea solution was completed) were recorded, a large number of bubbles being marked as ×, a small number of bubbles being marked as □, and no significant bubble being marked as O.

[0066] The above test results were shown in Table 1 below.

TABLE-US-00001 Thickness of Resin Layer /.Math.m Dissolution Time of Resin Layer /min Bubble at 0 min Bubble at 5 min Bubble at 10 min Embodiment 1 1 0.5 × × × Embodiment 2 5 1 × × × Embodiment 3 10 3 × □ ◯ Embodiment 4 30 6 × □ ◯ Embodiment 5 50 10 × × ◯ Embodiment 6 60 13 × × □ Embodiment 7 70 17 × × × Embodiment 8 10 4 × □ ◯ Embodiment 9 20 5 × ◯ ◯ Embodiment 10 30 7 × □ ◯ Embodiment 11 50 10 × × ◯ Comparative example 1 0 -- × × ×

[0067] It may be seen from Table 1 that the ultrasonic sensor provided in the present disclosure may effectively solve the problem of absorption of the bubbles on the transmitting/receiving surface and the reflecting surface, so that the bubbles are detached as the water-soluble resin dissolves, there are almost no bubbles or only a small amount of bubbles after the urea solution is filled, and there is no complicated process and the cost is low.

[0068] It may be seen from Comparative embodiments 1-7 that when the dissolution time of the water-soluble resin layer is in 3-10 min (Embodiments 3-5), it may not only effectively eliminate the bubbles on the transmitting/receiving surface and the reflecting surface, but also ensure that the sensor has a higher precision. Too short dissolution time (Embodiments 1-2) may result in re-adsorption of the bubbles on the transmitting/receiving surface and the reflecting surface, and too long dissolution time (Embodiments 6-7), incomplete dissolution of the water-soluble resin and still sticking of the bubbles, and may affect the precision of the sensor.

[0069] Metal ion content test

[0070] A metal ion content test was performed on the aqueous acrylic resin and the aqueous polyvinyl alcohol resin used in the above embodiments (reference standard: JIS K0119-2008). The results were shown in Table 2 below.

TABLE-US-00002 Sequence number Composition CAS NO. Content (%) Aqueous acrylic resin 1 Sodium ion 7440-23-5 0.0063 2 Potassium ion 7440-09-7 0.0011 3 Calcium ion 7789-78-8 0.0014 Aqueous polyvinyl alcohol resin 4 Sodium ion 7440-23-5 0.0081 5 Potassium ion 7440-09-7 0.0009 6 Calcium ion 7789-78-8 0.0018

[0071] It may be seen from Table 2 that the water-soluble resin layer of the present disclosure contains only trace metal elements, which meets the industry standard (GB29518-2013) and does not affect the sending and reception of ultrasonic signals.

[0072] The applicant states that a detailed method of the present disclosure is illustrated by means of the above embodiments in the present disclosure, but the present disclosure is not limited to the above detailed method, that is, it does not mean that the present disclosure must rely on the above detailed method for implementation. It should be apparent to those skilled in the art that any modifications to the present disclosure, equivalent substitutions to various raw materials of products of the present disclosure, addition of auxiliary components, selection of a specific way, etc. fall within the scope of the protection and invention of the present disclosure.

INDUSTRIAL APPLICABILITY

[0073] A solution provided by the embodiments of the present disclosure may be configured to coat a transmitting/receiving surface and a reflecting surface of an ultrasonic sensor with a water-soluble resin layer, although there are still bubbles attached to the transmitting/receiving surface and the reflecting surface coated with water-soluble resin in the process of adding a urea solution, as the water-soluble resin is dissolved in the urea solution, the bubbles lose their attachment points, rise to the surface of the liquid due to the light weight thereof, and then burst. Thus, the bubbles are rapidly detached from the transmitting/receiving surface and the reflecting surface of the ultrasonic sensor so as to eliminate the influence of the bubbles on the measurement of the sensor, thereby improving the measurement precision. In addition, the water-soluble resin layer has only trace metal elements, meets the industry standard and does not affect the sending and reception of ultrasonic signals.