Thermistor is a common electronic component, which can measure the surface temperature of objects quickly and accurately. But how do you test a thermistor?
1: The principle of thermistor
A thermistor is a semiconductor material that converts heat energy into electricity. It has the advantages of sensitive and rapid response, and is widely used in industrial and scientific research fields. In order to make better use of this material, people began to study how it works. Thermistors are mainly made of two materials: conductors and insulators. Conductors are generally made of silicon or germanium; Insulators are usually made of oxides, sulfides, or other nonmetallic elements. electronic parts distributors believe that when the temperature rises, the conductor gradually cools and releases heat, allowing the circuit to be connected; In contrast, when the current passes through the high-temperature device, heat energy is generated, causing the loop to break. Thermistors are built to take advantage of this property, so they can automatically sense the required voltage and cut off the power when it overheats. Thermistor can not only be used to detect the ambient temperature, but also can be applied to human health and energy conservation and environmental protection.
2: Detection methods: What are the common methods?
There are many commonly used thermistor detection methods, and the common ones are as follows :1. Solidworks software :SolidWorks is a professional modeling, finite element analysis and product simulation software. It can help engineers quickly create a three-dimensional model for accurate simulation of thermistors. 2. DesignWarer is a French company that provides a wide range of thermistor design services. 3. Marconix ABCjectives Inc. is a publicly traded company in the United States focused on manufacturing and marketing a wide range of high-quality high-temperature components and devices. 4. CANOPYNTIUR-XISION is a large electrical appliance manufacturer in Japan, mainly engaged in manufacturing high-temperature components and components used in industrial fields, such as motors, motors, controllers, electronic components, etc.
3. How to analyze the test results
Thermistor test result analysis: For general thermistor, mainly by measuring the current to judge whether it is working normally. If it is a simple resistor, it can be tested directly, but for complex thermistors, because of the more sophisticated internal structure, it is difficult to test directly. Under normal circumstances, can use professional instruments for detection, including multimeter, oscilloscope, etc. In the actual use process, there will be some problems, for example, sometimes the measured resistance value may not be the real resistance value, at this time, these data need to be further processed. Common troubleshooting methods 1. Check whether the cable is loose 2. Check whether the power supply is damaged 3. Check whether the wire connector is aging. 4. Check whether the copper foil layer of the pin is damaged. 5. Check the surface of the circuit board for oxides or dust
Let's introduce the detection method of thermistor. First, you need to get an active voltmeter and ammeter; Then an AC power line is connected to an active voltmeter. Finally, the power factor correction instrument is placed in the appropriate position to start the experiment.