CN214310158U - Independent urea quality sensor for detecting concentration of urea solution - Google Patents
Independent urea quality sensor for detecting concentration of urea solution Download PDFInfo
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- CN214310158U CN214310158U CN202120230792.7U CN202120230792U CN214310158U CN 214310158 U CN214310158 U CN 214310158U CN 202120230792 U CN202120230792 U CN 202120230792U CN 214310158 U CN214310158 U CN 214310158U
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- light source
- urea
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- quality sensor
- concentration
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 239000004202 carbamide Substances 0.000 title claims abstract description 82
- 238000001514 detection method Methods 0.000 claims abstract description 46
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 claims description 3
- 238000011900 installation process Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 230000007613 environmental effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses an independent urea quality sensor for detecting the concentration of urea solution, which comprises a sensor main body, a connecting flange and a screw, wherein the connecting flange is sleeved on the sensor main body, and the screw passes through the connecting flange and is used for fixing the independent urea quality sensor; the sensor main part comprises a shell, a detection surface, a sealing ring, an integrated circuit board, a light source emitting electrode, a connector and a light source receiving end, wherein the integrated circuit board, the light source emitting electrode and the light source receiving end are arranged in the shell, the light source emitting electrode and the light source receiving end are respectively electrically connected with the integrated circuit board, the detection surface is embedded on one end surface of the shell, the connector is installed on the side surface of the shell, and the sealing ring is sleeved on the shell close to the detection surface. Has the advantages that: the urea quality sensor adopting the light reflection principle is innovated, is not influenced by the environment, has no drift of detection precision, and breaks through the limitation of small capacity or small space. The installation structure is simple, and the installation process is quick.
Description
Technical Field
The utility model relates to a vehicle exhaust's nitrogen oxide handles technical field, concretely relates to stand alone type urea quality sensor for detecting urea solution concentration.
Background
As emission regulations become more stringent, vehicle exhaust treatment requirements become higher and higher, and in order to treat nitrogen oxides in exhaust, urea is required to be injected into exhaust to serve as a reducing agent to remove nitrogen oxides in exhaust. However, treatment efficiency is directly related to urea concentration, and a urea quality sensor is required to monitor the urea concentration in the SCR system.
In order to meet the requirement of monitoring the concentration of urea, the existing urea quality sensor utilizes a light source refraction principle or an ultrasonic loop sound velocity principle to detect the concentration of urea. However, the existing urea quality sensor is susceptible to detection environments, such as turbid solution, liquid with bubbles, liquid with ice mixture and the like, any one of the environments interferes with the transmission of a light source or ultrasonic waves to cause the detection precision drift of urea concentration, so that the authenticity of closed-loop monitoring of an SCR system is influenced; the urea quality sensor based on the light refraction principle or the ultrasonic principle needs to penetrate through the urea solution for detection, which requires that a large volume of urea solution exists in a detection area, so that the urea quality sensor in the prior art cannot adapt to detection of urea concentration in a small-capacity urea solution or a small space range, and has great limitation; the existing urea quality sensor mounting structure is complex in design and complicated in mounting procedure.
Therefore, a new urea quality sensor is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an it is not enough that prior art is overcome to the purpose, provides an independent type urea quality sensor for detecting urea solution concentration, abandons the light refraction principle and the ultrasonic wave principle among the prior art, and the factor of environmental impact has been overcome to the urea quality sensor of the light reflection principle of proposing of innovation, has avoided urea concentration detection precision to drift along with environmental impact, has guaranteed the authenticity of SCR system closed loop monitoring. Through the guarantee of light reflection principle, the urea quality sensor of this application only needs to leave one deck urea solution on its detection face, can calculate the refractive index through reflection light and obtain the urea solution concentration that corresponds, so the urea quality sensor of this application need not to pierce through the urea solution and detects, can install the outside at the urea bin, has broken through the urea concentration detection restriction that urea quality sensor can't adapt to in little capacity urea solution or the little space range among the prior art. The installation structure is simple, and the installation process is quick.
The purpose of the utility model is achieved through the following technical measures: a stand-alone urea quality sensor for detecting the concentration of urea solution comprises a sensor main body, a connecting flange and a screw, wherein the connecting flange is sleeved on the sensor main body, and the screw penetrates through the connecting flange and is used for fixing the stand-alone urea quality sensor;
the sensor main part comprises a shell, a detection surface, a sealing ring, an integrated circuit board, a light source emitting electrode, a connector and a light source receiving end, wherein the integrated circuit board, the light source emitting electrode and the light source receiving end are arranged in the shell, the light source emitting electrode and the light source receiving end are respectively electrically connected with the integrated circuit board, the detection surface is embedded on one end surface of the shell, the connector is installed on the side surface of the shell, and the sealing ring is sleeved on the shell close to the detection surface.
Furthermore, the detection surface is made of a transparent material, the light source emitter emits detection light when the detection surface is in a state of generating an incident angle theta 1, the incident angle theta 1 is larger than a critical angle theta c, and the light source receiving end receives total reflection light.
Furthermore, the connector is provided with an anti-disengaging hook, and the anti-disengaging hook is used for preventing the connector from being connected with external equipment.
Furthermore, the shell is made of black plastic.
Furthermore, a buckle is arranged on the side face of the shell close to one end of the detection face, a clamping groove is formed in the connecting flange, and the clamping groove and the buckle are matched for use.
Furthermore, the connecting flange is made of metal.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a stand alone type urea quality sensor for detecting urea solution concentration, abandons the light refraction principle and the ultrasonic wave principle among the prior art, and the urea quality sensor of the light reflection principle that the innovation provided has overcome the factor of environmental impact, has avoided urea concentration detection precision to drift along with environmental impact, has guaranteed the authenticity of SCR system closed loop monitoring. Through the guarantee of light reflection principle, the urea quality sensor of this application only needs to leave one deck urea solution on its detection face, can calculate the refractive index through reflection light and obtain the urea solution concentration that corresponds, so the urea quality sensor of this application need not to pierce through the urea solution and detects, can install the outside at the urea bin, has broken through the urea concentration detection restriction that urea quality sensor can't adapt to in little capacity urea solution or the little space range among the prior art. The urea box is fixed through the connecting flange and the screws, the mounting structure is simple, and the mounting process is rapid.
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a schematic diagram of a stand-alone urea quality sensor.
Fig. 2 is a schematic view of the structure of the connection flange.
Fig. 3 is a schematic structural view of the sensor body.
Fig. 4 is a reflection and refraction diagram of an optically denser medium to an optically thinner medium.
The sensor comprises a sensor body 1, a connecting flange 2, a screw 3, a shell 4, a detection surface 5, a sealing ring 6, a connector 7, a clamping groove 8, a buckle 9 and an anti-unhooking device 10.
Detailed Description
As shown in fig. 1 to 4, a self-contained urea quality sensor for detecting the concentration of urea solution comprises a sensor main body 1, a connecting flange 2 and screws 3, wherein the connecting flange 2 is sleeved on the sensor main body 1, and the screws 3 penetrate through the connecting flange 2 for fixing the self-contained urea quality sensor; the independent urea quality sensor is fixed with the urea box through the connecting flange 2 and the screw 3, the mounting structure is simple, and the mounting process is rapid. Sensor main part 1 includes casing 4, detection face 5, sealing washer 6, integrated circuit board, light source projecting pole, connector 7 and light source receiving terminal integrated circuit board, light source projecting pole and light source receiving terminal are established to the inside of casing 4, and light source projecting pole and light source receiving terminal are connected with the integrated circuit board electricity respectively, and detection face 5 inlays on a terminal surface of casing 4, and connector 7 is installed on the side of casing 4, and sealing washer 6 cover is established on being close to casing 4 of detection face 5. The light source emitting electrode emits detection light, the detection surface 5 is in contact with the urea solution, the detection light is totally reflected on the surface of the detection surface 5, the light source receiving end receives the reflection light, and finally the corresponding concentration of the urea solution is obtained by calculating the refractive index. The sealing ring 6 plays a role in sealing, and the urea solution is prevented from leaking in the using process.
The independent urea quality sensor adopts Snell's theorem, and when light enters the light thinner medium from the optically dense medium, two light rays are generated, namely refraction light rays and reflection light rays. The detection surface 5 is made of transparent materials, when the light source emitting electrode emits detection light on the detection surface 5, an incident angle theta 1 is generated, and when the incident angle theta 1 is larger than a critical angle theta c, the refracted light disappears to form a total reflection phenomenon. And the light source receiving end receives the total reflection light. Through the total reflection principle, detection light can accomplish concentration detection without penetrating through urea solution, can normally work in bubble environment, turbid environment and icing environment, guarantees that urea concentration measurement accuracy does not drift. The shell 4 is made of black plastic. The material selection of the detection surface 5 and the material selection of the housing 4 ensure a proper reflection of the detection light.
The connector 7 is provided with an anti-disengaging hook 10, and the anti-disengaging hook 10 is used for anti-disengaging connection between the connector 7 and external equipment. Adopt the design of standard connector 7, only need can realize being connected of this application and external system through standard adversary's piece connector 7, need not to design customization connector 7, convenient and reliable practices thrift the cost, and mousing-hook 10 is established on a lateral wall of connector 7, and when connector 7 was connected with adversary's piece connector 7, mousing-hook 10 can effectively be anticreep.
The side face of the shell 4, close to one end of the detection face 5, is provided with a buckle 9, the connecting flange 2 is provided with a clamping groove 8, and the clamping groove 8 is matched with the buckle 9 for use. The connecting flange 2 and the sensor body 1 are positioned to prevent relative rotational movement therebetween. Meanwhile, the clamping groove 8 and the buckle 9 can ensure the positioning accuracy and convenience in the installation process, and simplify the installation process.
The connecting flange 2 is made of metal.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A self-contained urea quality sensor for detecting the concentration of a urea solution, characterized by: the sensor comprises a sensor main body, a connecting flange and a screw, wherein the connecting flange is sleeved on the sensor main body, and the screw penetrates through the connecting flange to be used for fixing the independent urea quality sensor;
the sensor main part comprises a shell, a detection surface, a sealing ring, an integrated circuit board, a light source emitting electrode, a connector and a light source receiving end, wherein the integrated circuit board, the light source emitting electrode and the light source receiving end are arranged in the shell, the light source emitting electrode and the light source receiving end are respectively electrically connected with the integrated circuit board, the detection surface is embedded on one end surface of the shell, the connector is installed on the side surface of the shell, and the sealing ring is sleeved on the shell close to the detection surface.
2. A self-contained urea quality sensor for detecting the concentration of a urea solution as claimed in claim 1, characterized in that: the detection surface is made of transparent materials, the light source emitting electrode emits detection light when the detection surface is in a detection state, an incidence angle theta 1 is generated, the incidence angle theta 1 is larger than a critical angle theta c, and the light source receiving end receives total reflection light.
3. A self-contained urea quality sensor for detecting the concentration of a urea solution as claimed in claim 1, characterized in that: the anti-drop connector is characterized in that an anti-drop hook is arranged on the connector and used for preventing the connector from dropping off and being connected with external equipment.
4. A self-contained urea quality sensor for detecting the concentration of a urea solution as claimed in claim 1, characterized in that: the shell is made of black plastic.
5. A self-contained urea quality sensor for detecting the concentration of a urea solution as claimed in claim 4, characterized in that: the side face of the shell, close to one end of the detection face, is provided with a buckle, the connecting flange is provided with a clamping groove, and the clamping groove is matched with the buckle for use.
6. A self-contained urea quality sensor for detecting the concentration of a urea solution as claimed in claim 5, characterized in that: the connecting flange is made of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120230792.7U CN214310158U (en) | 2021-01-27 | 2021-01-27 | Independent urea quality sensor for detecting concentration of urea solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120230792.7U CN214310158U (en) | 2021-01-27 | 2021-01-27 | Independent urea quality sensor for detecting concentration of urea solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214310158U true CN214310158U (en) | 2021-09-28 |
Family
ID=77830747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120230792.7U Active CN214310158U (en) | 2021-01-27 | 2021-01-27 | Independent urea quality sensor for detecting concentration of urea solution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214310158U (en) |
-
2021
- 2021-01-27 CN CN202120230792.7U patent/CN214310158U/en active Active
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