Automatic visual solidifying point determining device

Abstract

The invention discloses an automatic visual solidifying point determining device. The automatic visual solidifying point determining device comprises a device shell, measuring devices and a stepping motor; the measuring device is driven by the stepping motor to tilt and restore, and the stepping motor is arranged in the device shell; the measuring device is electrically connected with a computer on one side of the automatic visual solidifying point determining device. Visual sensors in the measuring devices display images of an petroleum sample on computer software in real time, the measuringdevices are controlled by the stepping motor to tilt forwards by 45 degrees and restore, whether the petroleum sample is thoroughly solidified or not can be accurately judged, and measuring errors cannot be caused. By arranging a multi-layer cooling device and a thermostat, the stability of the temperature around the petroleum sample is ensured when the device runs.

Description

technical field [0001] The invention relates to a petroleum product freezing point measuring device, in particular to an automatic visual freezing point measuring device. Background technique [0002] The determination of the freezing point of petroleum products is divided into manual testing and automatic testing. The manual test is to take out the test tube when it is cooled to the expected temperature, tilt it and return it to its position at 45 degrees, and observe whether the liquid level of the oil sample moves. As the test tube leaves the cooling medium, the temperature will continue to rise, affecting the detection accuracy. Manual testing operations are not only intensive, but also time-consuming and laborious, and are gradually being replaced by automatic testing. [0003] The automatic test is to use the photocell to irradiate and detect the liquid level when it is cooled to the expected temperature, and judge whether the oil sample is flowing according to the r...

AI Technical Summary

Problems solved by technology

When the oil sample is solidified, a large area around it often solidifies, but a small spot in the center does not solidify. As a result, the manual test finds that there is still flow in the middle, but the automatic test has judged that there is no flow, resulting in the test error of the automatic instrument.

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