Method and system for determining open flash point by using CCD mode

Abstract

The invention discloses a method and a system for determining the open flash point by using a CCD mode. The method comprises: (1) acquiring an original image with no ignition and no flash fire; (2) heating the oil sample in a test oil cup; (3) acquiring real-time images during the heating process; (4) comparing the real-time images to the original image, and determining whether flash fire occurs; (5) repeatedly performing the steps (2)-(4) if the flash fire does not occur; and (6) recording the temperature of the oil sample as the flash point if the flash fire occurs. The system comprises a heating device, a CCD acquisition device, a temperature acquisition device, and a processor. According to the present invention, whether the flash fire occurs is automatically recognized by using the CCD technology, such that the labor force is liberated, the labor cost is saved, and the eyes of operators are protected; 2, the feature of the ignition head area image is eliminated, such that the blue light interference of the ignition flame can be effectively removed, and the accuracy of the determination result can be improved; and 3, with the firing pre-warning step, the setting of the too high preset temperature (exceeding the flash point) can be prevented.

Description

technical field

[0001] The invention relates to the field of oil product measurement, in particular to a method and system for measuring the open flash point of oil products such as insulating oil or transformer oil by using a CCD method. Background technique

[0002] At present, the Cleveland open cup method is used to measure the open flash point of oil products at home and abroad. This method is to add a certain volume of oil sample into a metal beaker under specified test conditions, and after heating at a uniform speed, use flame sweeping for every 2°C increase in temperature. Once, when a flash fire occurs at any point on the sample liquid surface, the test flame causes the sample vapor to ignite and spread the flame to the lowest temperature on the liquid surface, corrected to 101.3kPa atmospheric pressure, which is the flash point. Under the specified test conditions, the lowest temperature at which the test flame causes the sample vapor to ignite and continue to bur...

Examples

Embodiment Construction

[0058] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0059] In order to solve the shortcomings of artificial naked eye identification errors and damage to health mentioned in the background technology, the inventor, after many studies, proposed a technical solution of using the CCD method to measure the flash point of the opening to replace the human eye to identify the flash fire. It liberates manual labor and protects the health of personnel. The second improves the recognition accuracy and avoids errors caused by human eye recognition.

[0060] CCD, English full name: Charge-coupled Device, Chinese full name: charge-coupled device. It can be called a CCD image sensor, also called an image controller. CCD is a semiconductor device that converts optical images into electrical signals. The tiny photosensitive material implanted on the CCD is called a pixel (Pixel). The more pixels contained on a CCD,...

technical field

[0001] The invention relates to the field of oil product measurement, in particular to a method and system for measuring the open flash point of oil products such as insulating oil or transformer oil by using a CCD method. Background technique

[0002] At present, the Cleveland open cup method is used to measure the open flash point of oil products at home and abroad. This method is to add a certain volume of oil sample into a metal beaker under specified test conditions, and after heating at a uniform speed, use flame sweeping for every 2°C increase in temperature. Once, when a flash fire occurs at any point on the sample liquid surface, the test flame causes the sample vapor to ignite and spread the flame to the lowest temperature on the liquid surface, corrected to 101.3kPa atmospheric pressure, which is the flash point. Under the specified test conditions, the lowest temperature at which the test flame causes the sample vapor to ignite and continue to bur...

Examples

Embodiment Construction

[0058] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0059] In order to solve the shortcomings of artificial naked eye identification errors and damage to health mentioned in the background technology, the inventor, after many studies, proposed a technical solution of using the CCD method to measure the flash point of the opening to replace the human eye to identify the flash fire. It liberates manual labor and protects the health of personnel. The second improves the recognition accuracy and avoids errors caused by human eye recognition.

[0060] CCD, English full name: Charge-coupled Device, Chinese full name: charge-coupled device. It can be called a CCD image sensor, also called an image controller. CCD is a semiconductor device that converts optical images into electrical signals. The tiny photosensitive material implanted on the CCD is called a pixel (Pixel). The more pixels contained on a CCD,...

Images