Credibility detection method and device of temperature sensor
A temperature sensor and reliability technology, applied in the detection field, can solve the problems of the temperature sensor of the urea pump and the reliability detection method of the temperature sensor of the pump heater, etc.
Active Publication Date: 2019-08-09
WEICHAI POWER CO LTD
View PDF7 Cites 8 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] At present, there is no reliability detection method for the temperature sensor of the urea pump and the temperature sensor of the pump heater
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
[0063] Embodiments of the present application are described below in conjunction with the accompanying drawings.
[0064] At present, there is no reliability detection method for the temperature sensor of the urea pump and the temperature sensor of the pump heater. Therefore, how to detect the reliability of the temperature sensor of the urea pump and the temperature sensor of the pump heater is an urgent problem to be solved at present.
[0065] To this end, an embodiment of the present application provides a method for detecting the reliability of a temperature sensor, wherein the temperature sensor may be a temperature sensor of a urea pump or a temperature sensor of a pump heater. The pump heater may be used to heat the urea pump. The method includes: when the urea pump is in the heating mode, that is, when the pump heater heats the urea pump, the actual measured temperature difference of the temperature sensor can be obtained, wherein the actual measured temperature diff...
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 embodiments of the invention disclose a credibility detection method and device of a temperature sensor. The temperature sensor can be a temperature sensor of a urea pump or a temperature sensor of a pump heater, and the pump heater can be used for heating the urea pump. The credibility detection method comprises the steps that when the urea pump is in a heating mode, and that is, when the pump heater heats the urea pump, actual measurement temperature difference of the temperature sensor can be obtained, wherein the actual measurement temperature difference can be temperature difference detected by the temperature sensor from time t1 to time t2 under the practical condition; after the actual measurement temperature difference is obtained, theoretical temperature difference corresponding to the actual measurement temperature difference can further be obtained, and the theoretical temperature difference can be calculated temperature difference from the time t1 to the time t2 shoulddetected by the normal temperature sensor under the practical condition. According to the relationship between the actual measurement temperature difference and the theoretical temperature difference,whether the temperature sensor is reliable or not can be determined.
Description
technical field [0001] The present application relates to the technical field of detection, in particular to a method and device for authenticity detection of a temperature sensor. Background technique [0002] Selective catalytic oxidation (Selective Catalytic Reduction, SCR) system can be used to reduce the emission of nitrogen oxides in automobile exhaust gas. Its working principle is: spray urea in front of the SCR box, so that it can generate NH3 and react with nitrogen oxides in the exhaust gas, so as to achieve the purpose of removing nitrogen oxides. For the acquisition of urea in the SCR system, the urea is mainly drawn from the urea tank through the urea pump and pressurized, so as to be delivered to the urea nozzle of the SCR tank through the corresponding pipeline. Wherein, if the current ambient temperature of the vehicle is low, the urea pump needs to be heated by the pump heater to prevent the urea solution sucked into the urea pump from freezing. [0003] D...
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 IPC IPC(8): F01N11/00
CPCF01N11/002F01N2560/06F01N2610/02F01N2610/1433F01N2900/0416F01N2900/0422Y02T10/40
Inventor 胡金金张娟邱东闫立冰
Owner WEICHAI POWER CO LTD