Temperature measuring device for testing ptc core and testing equipment with it

Abstract

The invention discloses a temperature measuring device for detecting PTC (Positive Temperature Coefficient) core bodies and a detecting device with the temperature measuring device. The temperature measuring device comprises a temperature measuring jig, a temperature probe assembly and an infrared thermal imager; a plurality of first core body positioning slots into which the PTC core bodies can be inserted are formed in the temperature measuring jig; the temperature measuring jig is provided with positive electrode detecting portions for connecting the positive electrodes of the PTC core bodies and negative electrode detecting portions for connecting the negative electrodes of the PTC core bodies; the temperature probe assembly includes a temperature positive electrode probe and a temperature negative electrode probe, wherein the temperature positive electrode probe is suitable for electrically connecting the positive electrode detecting portions, and the temperature negative electrode probe is suitable for electrically connecting the negative electrode detecting portions; and the infrared thermal imager is opposite to the temperature measuring jig and is used for obtaining the infrared thermogram of the PTC core bodies located in the plurality of first core body positioning slots. With the temperature measuring device for detecting the PTC (Positive Temperature Coefficient) core bodies of the invention adopted, the plurality of PTC core bodies can be simultaneously detected. The detection efficiency and detection accuracy of the device are high, and the safety and reliability of the device are also high.

Description

technical field [0001] The invention relates to the technical field of core body detection, in particular to a temperature measuring device for detecting a PTC core body and detection equipment having the same. Background technique [0002] In the related technology, the resistance of the PTC (Positive Temperature Coefficient, positive temperature coefficient) core is measured one by one by a multimeter, and the method used for temperature measurement is: a simple temperature measurement fixture clamps a piece of aluminum powder layer on both sides of the PTC core and the positive and negative poles of the power supply lead out from the fixture are energized, and the temperature measuring probe of the handheld thermometer (or multimeter) touches the PTC core and is fixed with high-temperature insulating tape so that the temperature changes of the probe and the PTC core are consistent. to measure the temperature. However, the above measurement method has the following proble...

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Problems solved by technology

However, the above measurement method has the following problems: First, the contact state between the probe and the PTC core is different after each fixation, resulting in large deviations in the test results; second, only one PTC core can be tested at a time, and the characteristic data cannot be automatically saved. The efficiency is extremely low; the third is that the device is simple, and the core body and the probe need to be manually installed. In order to obtain the most realistic surface temperature, the probe and the electrode are bundled together so that the dangerous voltage of the electrode is directly transmitted to the probe and the temperature measuring instrument. If the insulation is damaged, it is very easy to cause an electric shock accident to the tester

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