A vehicle urea filling machine verification device and its realization method
A verification device, a technology of urea for vehicles, which is applied in measuring devices, testing/calibrating devices, instruments, etc., and can solve problems such as unfavorable on-site verification, difficulty in meeting measurement uncertainty requirements, and full of bubbles
Active Publication Date: 2021-07-06
广东省计量科学研究院(华南国家计量测试中心)
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] (1) In the process of calculating the standard volume, the volume expansion coefficient of the urea solution for vehicles needs to be used, and the volume expansion coefficient of the urea solution for vehicles has a nonlinear relationship with temperature and is related to the solution ratio. Although it can be used in the experiment room for measurement, but it is not convenient for the implementation of on-site verification
[0008] (2) The urea solution for vehicles will crystallize below -11.5°C, and may adhere to the standard metal measuring device. It needs to be cleaned with negative ion water before and after each measurement, resulting in great consumption, which is not conducive to the implementation of on-site verification ; In addition, it is difficult to completely remove the deposits by cleaning, which may cause inaccurate measurements of standard metal gauges
[0009] (3) The urea solution for vehicles is prone to generate a large number of bubbles during use, which may easily cause the metering neck liquid level tube of the metal standard gauge to be filled with bubbles and cannot be read
[0010] (4) When using a standard metal gauge to measure the minimum measurand of the filling machine, the measurement uncertainty is difficult to meet the requirements
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0056] The present invention will be further explained and described below in conjunction with the accompanying drawings and specific embodiments of the description. For the step numbers in the embodiment of the present invention, it is only set for the convenience of explanation and description, and there is no limitation on the order of the steps. The execution order of each step in the embodiment can be carried out according to the understanding of those skilled in the art Adaptive adjustment.
[0057] refer to figure 1 and figure 2, the embodiment of the present invention provides a vehicle urea filling machine verification device, including a device body, the device body is provided with a main standard, a container, a controller, auxiliary equipment and a display module, the main standard includes Electronic scales, density meters and thermocouples, the auxiliary equipment includes liquid level alarms and solenoid valves;
[0058] The electronic scale is used to obta...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a vehicle urea filling machine verification device and its realization method. The method includes: obtaining the liquid temperature at the liquid inlet of the container in real time through a thermocouple; The temperature of the liquid is controlled by heating and / or heat preservation; the weighing weight of the container is obtained in real time through an electronic scale; the density of the liquid in the container is obtained through a density meter; the liquid level sensing signal in the container is obtained in real time through a liquid level alarm; The controller controls the opening and closing of the electromagnetic valve to discharge the liquid in the container from the device body; the controller controls the display module to display information, the invention avoids the waste of filling liquid and improves the accuracy of the verification, which is convenient for the implementation of on-site verification and can be widely used In the field of metrology verification technology.
Description
technical field [0001] The invention relates to the technical field of measurement verification, in particular to a verification device for a vehicle urea filling machine and a method for realizing the same. Background technique [0002] Explanation of terms: standard metal measuring instrument refers to a measuring instrument made of metal with a definite volume according to the specified structure, which can be used as a capacity value. For example, the measurement range of a 50L standard metal gauge may include (50L±50mL), because only when the filling liquid fills the lower tank and enters the upper measuring neck, can the reading be performed through the liquid level tube and the vernier. The readable range is usually not too large. [0003] Diesel vehicle exhaust treatment fluid (abbreviated as vehicle urea solution) is a liquid used in the SCR exhaust treatment system of diesel vehicles to reduce the emission of nitrogen oxides in the exhaust. Urea solution for vehi...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01F25/00
CPCG01F25/0084
Inventor 徐文彪谭栋文刘胜祥郑培亮
Owner 广东省计量科学研究院(华南国家计量测试中心)