Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and system for testing temperature response rate of NTC automobile temperature sensor

A temperature sensor and temperature response technology, which is applied in thermometer testing/calibration, thermometers, instruments, etc., can solve the problem that the timing of timer start timing and end timing is difficult to grasp, and it cannot better match the simulated car air duct environment and constant temperature air box Unable to measure wind speed and other problems, to achieve the effect of improving test operability, fast and accurate temperature field switching, and improving the accuracy of test results

Active Publication Date: 2021-10-08
XIAOGAN HUAGONG GAOLI ELECTRONICS
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This test method will lead to large errors in the detection results:
[0004] (1) The wind speed in the constant temperature air box cannot be measured and is irregular, not controllable, and cannot better match the simulated car air duct environment;
[0005] (2) The temperature in the air box is easily broken and causes violent fluctuations;
[0006] (3) The process of transferring the sensor to be tested is not easy to operate, and the transfer must go through the uncontrollable variable of room temperature environment, which causes a large detection error;
[0007] (4) It is not easy to grasp when the timer starts timing and ending timing, and there are large accidental errors

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and system for testing temperature response rate of NTC automobile temperature sensor
  • Method and system for testing temperature response rate of NTC automobile temperature sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 and figure 2 , the embodiment of the present invention provides a kind of NTC automobile temperature sensor 13 to the testing method of temperature response rate, comprises the following steps:

[0033] S1, the temperature sensor 13 to be measured is installed on the simulated air duct 12, and the simulated air duct 12 is used to simulate the working condition of the automobile air duct, wherein the wind temperature in the simulated air duct 12 is constant at T 0 ;

[0034] S2, applying current to the temperature sensor 13 to be tested so that the temperature sensor 13 to be tested is self-heating, and when the real-time resistance of the temperature sensor 13 to be tested is within the set resistance range, stop loading the current to the temperature sensor 13 to be tested ; The set resistance range is the sensing temperature at T 1 The sensor resistance corresponding to the above;

[0035] S3, when the real-time resistance value of the temperatur...

Embodiment 2

[0056] Embodiments of the present invention accordingly provide a kind of NTC automobile temperature sensor 13 to the test system of temperature response rate, and this test system comprises:

[0057] A constant temperature bellows 11, a simulated air duct 12 is arranged inside the constant temperature bellows 11, an air blast unit 14 is provided at one end of the simulated air duct 12, and a temperature sensor 13 installation position is provided on the simulated air duct 12;

[0058] A power supply for loading current to the temperature sensor 13 to be measured, the power supply is arranged in the constant temperature bellows 11 or outside the constant temperature bellows 11, and the power supply line of the power supply is wired to the installation position of the temperature sensor 13;

[0059] A resistance scanner for obtaining the real-time resistance value of the temperature sensor 13 to be measured, the resistance scanner is arranged in the constant temperature bellows ...

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

No PUM Login to View More

Abstract

The invention provides a method for testing the temperature response rate of an NTC automobile temperature sensor. The method comprises the following steps: installing a temperature sensor on a simulated air duct with a constant air temperature of T0; electrifying the temperature sensor for self-heating, when the real-time resistance value of the temperature sensor is within a set resistance value range, stopping the temperature sensor from being electrified, and setting the set resistance value range as the corresponding sensor resistance value when the induction temperature is higher than T1; when the real-time resistance value of the temperature sensor reaches a first set timing threshold value, starting timing, and setting the sensing temperature corresponding to the first set timing threshold value as T2; when the real-time resistance value of the temperature sensor reaches a second set timing threshold value, stopping timing, and setting the sensing temperature corresponding to the second set timing threshold value as T2-[(T2-T0)*63.2%]; and taking the timing time as a thermal time constant of the temperature sensor, wherein T2 is more than T0 and less than T1. Correspondingly, the invention also provides a test system. According to the invention, an automobile air duct orifice can be well simulated, rapid and accurate temperature field switching is realized, timing start and stop time is easy to control, and the accuracy and reliability of a test result are ensured.

Description

technical field [0001] The invention relates to the detection of an automobile temperature sensor, in particular to a method and system for testing the temperature response rate of an NTC automobile temperature sensor. Background technique [0002] The automobile air duct temperature sensor is a sensing device that senses the air duct temperature signal and collects the signal to feed back to the control module to adjust the automobile heating system in time. Its response rate to temperature directly affects the operation of the automobile heating system. At present, the method of testing the temperature response rate of NTC automotive temperature sensors is: prepare two constant temperature air boxes in advance, adjust one to T1°C and the other to T2°C, and then transfer the sensor to be tested from the T1°C constant temperature air box to T2 ℃ constant temperature air box, use a timer to record the time required for the sensor temperature to change by 63.2% (ie (T2-T1)×63....

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01K15/00
CPCG01K15/007Y02T10/40
Inventor 陈得良陈朋
Owner XIAOGAN HUAGONG GAOLI ELECTRONICS