CN211697653U - Urea liquid level quality sensor - Google Patents
Urea liquid level quality sensor Download PDFInfo
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- CN211697653U CN211697653U CN202020397535.8U CN202020397535U CN211697653U CN 211697653 U CN211697653 U CN 211697653U CN 202020397535 U CN202020397535 U CN 202020397535U CN 211697653 U CN211697653 U CN 211697653U
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Abstract
The utility model discloses a urea liquid level quality sensor has integrateed the liquid level and the concentration measurement function of urea liquid, and the structure is exquisite, utilizes ultrasonic wave's principle, obtains the concentration of urea liquid through the transmission-reflection cycle in the fixed distance of first ultrasonic wave transducing piece horizontal direction, judges the liquid level height at vertical direction work through second ultrasonic wave transducing piece, carries out temperature compensation with the help of temperature sensor, and the liquid level and the concentration data of acquireing urea liquid are reliable, detect the precision height.
Description
Technical Field
The utility model relates to an automobile urea liquid detects technical field. More specifically, the utility model relates to a urea liquid level quality sensor.
Background
Urea quality sensor installs and uses on the urea case of car, it mainly carries out the quality detection to the urea of urea incasement, guarantee the quality of urea, realize the high-efficient processing of urea to vehicle exhaust, effectively prevent the environmental pollution that vehicle exhaust caused after unqualified urea processing, because urea quality sensor works for a long time in environments such as high temperature, low temperature, vibration, current sensor generally is according to spectrum technique, it is inaccurate to cause concentration detection if there is impurity in the medium, in addition under the car operation environment of jolting, also cause the level measurement inaccurate easily.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a urea liquid level quality sensor to urea liquid level quality sensor detects inaccurate technical problem among the solution prior art.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a urea level quality sensor, comprising:
the upper end of the mounting base is provided with a rectangular groove with an upward opening direction;
the first ultrasonic energy conversion sheet is arranged on the mounting base and positioned on one side of the rectangular groove in the length direction, and the ultrasonic emission direction of the first ultrasonic energy conversion sheet is consistent with the length direction of the rectangular groove;
the reflecting plate is fixed on the side wall of the rectangular groove, which is opposite to the first ultrasonic wave transduction piece, and the reflecting plate is used for reflecting the ultrasonic waves emitted by the first ultrasonic wave transduction piece;
the second ultrasonic energy conversion sheet is arranged on the mounting base and is positioned below the rectangular groove, and the ultrasonic emission direction of the second ultrasonic energy conversion sheet is vertically upward;
the temperature sensor is arranged on the mounting base and is close to the rectangular groove;
the control chip is arranged in the mounting base and is electrically connected with the first ultrasonic energy conversion sheet and the second ultrasonic energy conversion sheet respectively;
the plug wire connector is used for being connected with external control equipment and arranged at a position, close to the lower side, of the side wall of the mounting base, and is electrically connected with the first ultrasonic wave energy conversion sheet, the second ultrasonic wave energy conversion sheet, the temperature sensor and the control chip.
Preferably, the number of the second ultrasonic wave transduction pieces is two, and the two second ultrasonic wave transduction pieces are symmetrically arranged along the width direction of the rectangular groove.
Preferably, the upper end of the rectangular groove is covered with a layer of filter screen, and the filter screen is provided with filter screen holes corresponding to the second ultrasonic energy conversion sheet.
Preferably, an annular mounting groove is formed in the position, close to the lower side, of the side wall of the mounting base, and the annular mounting groove is located above the plug wire connector.
Preferably, the bottom of the annular mounting groove is provided with a Z-shaped sealing ring.
Preferably, a through hole communicating with the rectangular groove is formed in the center of the mounting base.
Preferably, the bottom of the mounting base is provided with an annular thin rubber pad, and the inner diameter of the annular thin rubber pad is larger than the outer diameter of the through hole.
The utility model discloses at least, include following beneficial effect: the utility model discloses a urea liquid level quality sensor has integrateed the liquid level and the concentration measurement function of urea liquid, and the structure is exquisite, utilizes ultrasonic wave's principle, obtains the concentration of urea liquid through the transmission-reflection cycle in the fixed distance of first ultrasonic wave transducing piece horizontal direction, judges the liquid level height at vertical direction work through second ultrasonic wave transducing piece, carries out temperature compensation with the help of temperature sensor, and the liquid level and the concentration data that acquire urea liquid are reliable, detect the precision height.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a front view structural diagram of the present invention;
fig. 2 is a top view structural diagram of the present invention.
The specification reference numbers indicate: 1. the installation base, 2, rectangle recess, 3, first ultrasonic wave transducing piece, 4, reflecting plate, 5, second ultrasonic wave transducing piece, 6, temperature sensor, 7, control chip, 8, plug wire connector, 9, filter screen, 10, filter screen hole, 11, annular mounting groove, 12, Z type sealing washer, 13, perforating hole, 14, annular thin rubber pad, 15, urea bottom of the case portion.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
As shown in fig. 1 and 2, the urea liquid level quality sensor of the present invention comprises:
the mounting base 1 is provided with a rectangular groove 2 with an upward opening at the upper end;
the first ultrasonic energy conversion sheet 3 is arranged on the mounting base 1 and positioned on one side of the rectangular groove 2 in the length direction, and the ultrasonic emission direction of the first ultrasonic energy conversion sheet 3 is consistent with the length direction of the rectangular groove 2;
the reflecting plate 4 is fixed on the side wall of the rectangular groove 2 opposite to the first ultrasonic wave transduction piece 3, and the reflecting plate 4 is used for reflecting the ultrasonic waves emitted by the first ultrasonic wave transduction piece 3;
the second ultrasonic energy conversion sheet 5 is arranged on the mounting base 1 and is positioned below the rectangular groove 2, and the ultrasonic emission direction of the second ultrasonic energy conversion sheet 5 is vertically upward;
the temperature sensor 6 is arranged on the mounting base 1 and is close to the rectangular groove 2;
a control chip 7 installed inside the mounting base 1 and electrically connected to the first ultrasonic transducer 3 and the second ultrasonic transducer 5, respectively;
and the plug wire connector 8 is used for being connected with external control equipment and is arranged at a position close to the lower side of the side wall of the mounting base 1, and the plug wire connector 8 is electrically connected with the first ultrasonic energy conversion sheet 3, the second ultrasonic energy conversion sheet 5, the temperature sensor 6 and the control chip 7.
Install urea liquid level quality sensor in urea bottom of the case portion 15 before using, wherein the rectangle recess is located the inside of urea case and the direction is vertical upwards, the plug wire connector is located outside the urea case, be connected with external control equipment, the wiring groove can be seted up as the line needs to walk to installation base inside, make plug wire connector and first ultrasonic wave transducing piece, second ultrasonic wave transducing piece, temperature sensor, the equal electric connection of control chip, control chip and first ultrasonic wave transducing piece, second ultrasonic wave transducing piece electric connection respectively, through external control equipment control circuit circular telegram, pour into the urea liquid into in the urea case after preparing to accomplish. After the circuit is switched on, the temperature sensor measures the temperature of the urea liquid in the urea box, when the liquid level is measured, the external control equipment controls the second ultrasonic energy conversion piece to work through the control chip, at the moment, the first ultrasonic energy conversion piece does not work, the ultrasonic wave transmitted by the second ultrasonic energy conversion piece reaches the highest liquid level of the urea liquid and is reflected, the second ultrasonic energy conversion piece returns to the second ultrasonic energy conversion piece to receive, the height of the liquid level is calculated by transmitting the time difference between the transmission and the reception to the external control equipment terminal through the plug wire connector, when the concentration of the urea liquid is measured, the control chip controls the second ultrasonic energy conversion piece to stop working and the first ultrasonic energy conversion piece to work, the first ultrasonic energy conversion piece transmits the ultrasonic wave to the reflecting plate and returns, the time spent on obtaining the fixed distance between the first ultrasonic energy conversion piece and the reflecting plate is transmitted to the external control equipment terminal through the plug wire connector to convert and, when the first ultrasonic wave energy conversion sheet and the second ultrasonic wave energy conversion sheet work, the temperature sensors respectively measureAnd (4) carrying out temperature compensation on the real-time temperature data, and finally displaying the accurate liquid level and concentration of the urea solution on an external control equipment terminal. During calculation, the temperature sensor obtains a temperature value t according to a temperature compensation formula Vt＝V0+a(t-t0) In which V istRepresenting the speed of sound at temperature t, t0Is a standard temperature (20 ℃), V0Denotes the temperature t0A is a temperature coefficient, V0The values of a and a can be found according to a handbook of liquid-temperature coefficient, and the transmission speed V of the fixed distance between the rectangular grooves of the ultrasonic wave in the liquid is calculated by V ═ S/T, and the transmission speed V is calculated by VtAnd the second ultrasonic transducer obtains the reflection time to calculate the liquid level distance, and the liquid concentration W of the urea solution is Wt×V/VtWherein W istThe standard concentration of the urea solution.
The utility model discloses a urea liquid level quality sensor has integrateed the liquid level and the concentration measurement function of urea liquid, and the structure is exquisite, utilizes ultrasonic wave's principle, obtains the concentration of urea liquid through the transmission-reflection cycle in the fixed distance of first ultrasonic wave transducing piece horizontal direction, judges the liquid level height at vertical direction work through second ultrasonic wave transducing piece, carries out temperature compensation with the help of temperature sensor, and the liquid level and the concentration data that acquire urea liquid are reliable, detect the precision height.
In another technical solution, as shown in fig. 1, two second ultrasonic transducer pieces 5 are provided, and the two second ultrasonic transducer pieces 5 are symmetrically arranged along the width direction of the rectangular groove 2. Two second ultrasonic wave transducer pieces are symmetrically arranged and work simultaneously when the liquid level of the urea liquid is measured, and the problem of measurement errors caused by frequent and unsmooth liquid levels when the urea tank is violently jolted and vibrated along with an automobile can be solved by taking the average value of the two ultrasonic wave transducer pieces during calculation.
In another technical scheme, as shown in fig. 1 and 2, a layer of filter screen 9 covers the upper end of the rectangular groove 2, and a filter screen hole 10 is formed in the filter screen 9 at a position corresponding to the second ultrasonic transducer 5. The filter screen is arranged to form protection in the reflection space of the first ultrasonic wave energy conversion sheet formed by the rectangular groove, and the blocking impurities enter the rectangular groove to influence the accuracy of concentration data measurement.
In another technical solution, as shown in fig. 1, an annular mounting groove 11 is formed at a position below a side wall of the mounting base 1, and the annular mounting groove 11 is located above the plug wire connector 8. Install the urea case through the annular mounting groove with the installation base joint on, be favorable to keeping installation base direction level.
In another technical scheme, as shown in fig. 1, a Z-shaped sealing ring 12 is arranged at the bottom of the annular mounting groove 11. Set up Z type sealing washer on annular installation groove, increase sealing area utilizes the elasticity of sealing washer itself to make sealed effect better, and the supplementary damping effect that plays simultaneously.
In another technical solution, as shown in fig. 1 and 2, a through hole 13 communicating with the rectangular groove 2 is formed in the center of the mounting base 1. At the central trompil of installation base, the lower extreme of perforating hole can acquire the pump body coupling that urea liquid carries out tail gas treatment through pipeline and needs, and urea liquid reentrants rectangle recess through the filter screen can play the effect of filtering impurity.
In another technical solution, as shown in fig. 1 and 2, an annular thin rubber pad 14 is disposed at the bottom of the mounting base 1, and the inner diameter of the annular thin rubber pad 14 is larger than the outer diameter of the through hole 13. The bottom of the mounting base is provided with an annular thin rubber pad to further play a role in vibration reduction for the whole urea liquid level quality sensor and the urea box.
While the embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields where the invention is suitable, and further modifications may readily be made by those skilled in the art, and the invention is thus not limited to the specific details and herein shown and described in fig. 1, 2, without departing from the general concept defined by the claims and their equivalents.
Claims (7)
1. Urea level quality sensor, its characterized in that includes:
the upper end of the mounting base is provided with a rectangular groove with an upward opening direction;
the first ultrasonic energy conversion sheet is arranged on the mounting base and positioned on one side of the rectangular groove in the length direction, and the ultrasonic emission direction of the first ultrasonic energy conversion sheet is consistent with the length direction of the rectangular groove;
the reflecting plate is fixed on the side wall of the rectangular groove, which is opposite to the first ultrasonic wave transduction piece, and the reflecting plate is used for reflecting the ultrasonic waves emitted by the first ultrasonic wave transduction piece;
the second ultrasonic energy conversion sheet is arranged on the mounting base and is positioned below the rectangular groove, and the ultrasonic emission direction of the second ultrasonic energy conversion sheet is vertically upward;
the temperature sensor is arranged on the mounting base and is close to the rectangular groove;
the control chip is arranged in the mounting base and is electrically connected with the first ultrasonic energy conversion sheet and the second ultrasonic energy conversion sheet respectively;
the plug wire connector is used for being connected with external control equipment and arranged at a position, close to the lower side, of the side wall of the mounting base, and is electrically connected with the first ultrasonic wave energy conversion sheet, the second ultrasonic wave energy conversion sheet, the temperature sensor and the control chip.
2. The urea level quality sensor of claim 1, wherein the second ultrasonic transducer plates are arranged in two, and the two second ultrasonic transducer plates are symmetrically arranged along the width direction of the rectangular groove.
3. The urea liquid level quality sensor according to claim 1, wherein the upper end of the rectangular groove is covered with a layer of filter screen, and the filter screen is provided with filter screen holes corresponding to the position of the second ultrasonic transducer.
4. The urea level quality sensor of claim 1, wherein an annular mounting groove is formed in a position below a side wall of the mounting base, and the annular mounting groove is located above the plug connector.
5. The urea level quality sensor of claim 4, wherein the bottom of the annular mounting groove is provided with a Z-shaped sealing ring.
6. The urea level quality sensor of claim 1, wherein the mounting base has a through hole in its center that communicates with the rectangular recess.
7. The urea level quality sensor of claim 6, wherein an annular thin rubber pad is disposed at the bottom of the mounting base, and the inner diameter of the annular thin rubber pad is larger than the outer diameter of the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020397535.8U CN211697653U (en) | 2020-03-25 | 2020-03-25 | Urea liquid level quality sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020397535.8U CN211697653U (en) | 2020-03-25 | 2020-03-25 | Urea liquid level quality sensor |
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| CN211697653U true CN211697653U (en) | 2020-10-16 |
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| CN202020397535.8U Active CN211697653U (en) | 2020-03-25 | 2020-03-25 | Urea liquid level quality sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113484411A (en) * | 2021-07-14 | 2021-10-08 | 武汉洛特福动力技术有限公司 | Urea ultrasonic sensor |
| CN113847129A (en) * | 2021-10-12 | 2021-12-28 | 安徽江淮汽车集团股份有限公司 | Vehicle-mounted urea solution index measuring system |
| CN115434788A (en) * | 2022-08-12 | 2022-12-06 | 潍柴动力股份有限公司 | Urea concentration sensor device and control method |
-
2020
- 2020-03-25 CN CN202020397535.8U patent/CN211697653U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113484411A (en) * | 2021-07-14 | 2021-10-08 | 武汉洛特福动力技术有限公司 | Urea ultrasonic sensor |
| CN113847129A (en) * | 2021-10-12 | 2021-12-28 | 安徽江淮汽车集团股份有限公司 | Vehicle-mounted urea solution index measuring system |
| CN115434788A (en) * | 2022-08-12 | 2022-12-06 | 潍柴动力股份有限公司 | Urea concentration sensor device and control method |
| CN115434788B (en) * | 2022-08-12 | 2024-02-20 | 潍柴动力股份有限公司 | Urea concentration sensor device and control method |
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