Thermistor temperature characteristic measurement device based on embedded system

An embedded system and thermistor technology, applied in measuring devices, thermometer testing/calibration, thermometers, etc., can solve problems such as inaccurate readings of glass thermometers, mismatch between temperature and resistance, and save invalid waiting time, Avoid experimental error, low cost effect

Pending Publication Date: 2019-06-14
UNIV OF SCI & TECH LIAONING
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  • Abstract
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  • Application Information

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Problems solved by technology

The existing thermistor temperature characteristic measurement test device uses a single-arm bridge to measure the resistance of the thermistor, and uses a traditional glass thermometer to measure the temperature of the heat-conducting medium (tap water). There is a time error in the actual experimental process. That is, the temperature and the resistance value do not correspond, and the reading with the glass thermometer is not accurate enough

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  • Thermistor temperature characteristic measurement device based on embedded system
  • Thermistor temperature characteristic measurement device based on embedded system
  • Thermistor temperature characteristic measurement device based on embedded system

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings, but it should be pointed out that the implementation of the present invention is not limited to the following embodiments.

[0020] See Figure 1-Figure 3 , a device for measuring temperature characteristics of a thermistor based on an embedded system, including a housing 5, a main control chip 1, a sampling resistor 2, a temperature sensor 3, a display screen 3, a 12V DC power supply 6, a heating device 8, and a 3.3V stable Piezoelectric power supply 9, 12V power supply socket 14, ADC analog-to-digital converter 15; main control chip 1, several sampling resistors 2, 3.3V regulated power supply 9 are fixed in the housing 5, and ADC analog-to-digital converter 15 is built in the main control chip 1. The 3.3V regulated power supply 9 is connected to the ADC analog-to-digital converter 15, the temperature sensor 3 and the display are connected to the main control chip 1, ...

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Abstract

The invention relates to a thermistor temperature characteristic measurement device based on an embedded system. The device comprises a shell, a master control chip, a sampling resistor, a lever-shifting switch, a temperature sensor, a display screen, a 12V DC power supply, a heating device, a 3.3V voltage-stabilizing power supply, a 12V power socket, and an ADC analog-to-digital converter; the ADC is arranged in the master control chip; the sampling resistor is serially connected with the thermistor, the lever-shifting switch can be used for selecting different sampling resistors to seriallyconnect with the thermistor; the temperature sensor and the display screen are connected with the master control chip; the temperature sensor and the thermistor are suspended in the heating device; the 12V DC power is connected with the 3.3V voltage-stabilizing power through the power socket arranged in the shell. The measurement device disclosed by the invention has the advantages that the mastercontrol chip is taken as a core, the display, the temperature sensor and like electronic devices are embedded system of the execution device; the device is simple in structure, low in cost and strongoperability, and can be used as the teaching practice for the thermistor temperature characteristic measurement test.

Description

technical field [0001] The invention belongs to a thermistor temperature characteristic measuring instrument, in particular to a thermistor temperature characteristic measuring device based on an embedded system. Background technique [0002] With the advancement of science and technology, more and more systems composed of electrical components can replace manual operations, and embedded systems have gradually come into people's sight. Embedded systems are a kind of "completely embedded in the controlled application-specific computer systems". The existing thermistor temperature characteristic measurement test device uses a single-arm bridge to measure the resistance of the thermistor, and uses a traditional glass thermometer to measure the temperature of the heat-conducting medium (tap water). There is a time error in the actual experimental process. That is, the temperature does not correspond to the resistance value, and the reading with a glass thermometer is not accura...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K15/00
Inventor 徐崇苏琦峰王硕姜先晟袁鑫明贾红宝
Owner UNIV OF SCI & TECH LIAONING
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