An automatic test system and test method for a vehicle temperature sensor
An automatic test system and temperature sensor technology, applied in the field of sensor testing, can solve the problems of high control accuracy requirements of environmental control system, difficult test process, no combination of environmental temperature control, etc., so as to improve reliability and accuracy and improve efficiency. Effect
Inactive Publication Date: 2018-07-20
XIHUA UNIV
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Problems solved by technology
Although data acquisition cards have also been used in recent years to obtain them, they have not been combined with environmental temperature control, which requires the environmental temperature to be controlled at a certain set point. The accuracy and real-time performance of data acquisition are still not good, and for The control accuracy of the environmental control system is high, which brings certain difficulties to the testing process.
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[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Such as figure 1 As shown, an automatic temperature sensor test system for vehicles includes a test bench 1 , a temperature control box 25 , a dry refrigerator 41 , a liquid storage tank 51 and an electrical control unit 6 .
[0033] The temperature control box 25 is a sealed temperature-controllable place, which provides an environment for the test of the temperature sensor. Such as figure 2 As shown, the upper part of the temperature control box 25 is provided with a box cover 21, and the bottom is provided with a heating plate 27 for heating the air or liquid in the box. The temperature sensor 22 to be measured and the standard sensor 23 are arranged on the box cover 21 .
[0034] Optimized, in order to facilitate the test, the cover 21 is provided with a cover plate 24 for sealing the temperature control box 25, and the temperat...
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The invention discloses an automatic test system and a test method for a vehicle temperature sensor. The system comprises a temperature control box, a dry ice bunker, a liquid storage tank and an electric control unit. The upper part of the temperature control box is provided with a box cover. The bottom of the temperature control box is provided with a heating plate. A to-be-tested temperature sensor and a standard sensor are arranged on the box cover. The dry ice bunker is connected with the temperature control box through a connecting pipeline. The connecting pipeline is provided with a dry ice spraying controller. The liquid storage tank is connected with the temperature control box through a liquid reflux pipe and a liquid delivery pipe. The liquid reflux pipe is provided with a liquid reflux control electromagnetic valve. The liquid delivery pipe is provided with an electric infusion pump. During test, the temperature control box is sealed. When the air / liquid in the box is heated to reach the upper limit of the test range, the heating is stopped. At this time, sensor signals are acquired and the dry ice is sprayed into the temperature control box for cooling purpose. When the temperature is stabilized, sensor signals are acquired. The above steps are repeated and signals are continuously acquired until the temperature reaches the lower limit of the test range. According to the technical scheme of the invention, the test efficiency, the reliability and the accuracy of the test system are improved. Meanwhile, the system is better in versatility, convenience and real-time performance.
Description
technical field [0001] The invention relates to the technical field of sensor testing, in particular to an automatic testing system and testing method for a vehicle temperature sensor. Background technique [0002] There are a large number of temperature sensors on the car, such as engine intake temperature sensor, coolant temperature sensor, engine oil temperature sensor, automatic transmission oil temperature sensor, indoor temperature sensor of air conditioning system, ambient temperature sensor, evaporator temperature sensor, suspension air Pump temperature sensor, etc. The test range of each temperature sensor is different. For example, the sensing temperature of the coolant temperature sensor is defined between -35~120°C, and the sensing temperature of the intake air temperature sensor is between -40-60°C; the test medium is also different. If there is a test gas , and some test liquids. [0003] Existing temperature sensor testing systems for vehicles usually divide...
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IPC IPC(8): G01K15/00
CPCG01K15/007
Inventor 杨燕红田云德伍志翔曹毅
Owner XIHUA UNIV