The present invention relates to a method for early detection of carbonization during the drying of an organic material. The method of the present invention measures temperature variation per unit time of exhaust gas containing water (H.sub.2O), carbon monoxide (CO), or carbon dioxide (CO.sub.2), which are to be generated by the pyrolysis of an organic material, and the concentration of carbon monoxide/carbon dioxide of the exhaust gas, so as to determine the occurrence of carbonization therethrough, thereby enabling early detection of carbonization within a dryer.

The present disclosure discloses a device for monitoring electrical equipment for electrical contact overheating, which comprises a gas collection device, a gas detection device, a data processing device, a data storage device and a display and early warning device. The present disclosure further discloses a method for monitoring electrical equipment for electrical contact overheating. The present disclosure can provide a basis for the evaluation and early warning of electrical contact overheating of electrical equipment based on the analysis of the thermally decomposed characteristic gases of the electrical joint compound, and has the characteristics of no space limitation, no need for a large number of layout points, high accuracy, simple structure and easy operation.

The present invention is directed to a method of estimating an overheating temperature of an oil-immersed electric appliance in which ester oil is used as insulating oil. The overheating temperature is estimated based on a first concentration ratio representing a concentration ratio between two types of gas components contained in the ester oil and a second concentration ratio representing a concentration ratio between other two types of gas components contained in the ester oil. The first concentration ratio and the second concentration ratio are selected from a concentration ratio between acetylene and ethane, a concentration ratio between acetylene and hydrogen, a concentration ratio between acetylene and methane, and a concentration ratio between acetylene and ethylene.

The present disclosure discloses a device for monitoring electrical equipment for electrical contact overheating, which comprises a gas collection device, a gas detection device, a data processing device, a data storage device and a display and early warning device. The present disclosure further discloses a method for monitoring electrical equipment for electrical contact overheating. The present disclosure can provide a basis for the evaluation and early warning of electrical contact overheating of electrical equipment based on the analysis of the thermally decomposed characteristic gases of the electrical joint compound, and has the characteristics of no space limitation, no need for a large number of layout points, high accuracy, simple structure and easy operation.

The present invention relates to a method for early detection of carbonization during the drying of an organic material. The method of the present invention measures temperature variation per unit time of exhaust gas containing water (H.sub.2O), carbon monoxide (CO), or carbon dioxide (CO.sub.2), which are to be generated by the pyrolysis of an organic material, and the concentration of carbon monoxide/carbon dioxide of the exhaust gas, so as to determine the occurrence of carbonization therethrough, thereby enabling early detection of carbonization within a dryer.

The present invention is directed to a method of estimating an overheating temperature of an oil-immersed electric appliance in which ester oil is used as insulating oil. The overheating temperature is estimated based on a first concentration ratio representing a concentration ratio between two types of gas components contained in the ester oil and a second concentration ratio representing a concentration ratio between other two types of gas components contained in the ester oil. The first concentration ratio and the second concentration ratio are selected from a concentration ratio between acetylene and ethane, a concentration ratio between acetylene and hydrogen, a concentration ratio between acetylene and methane, and a concentration ratio between acetylene and ethylene.

The present invention discloses a multi-lightpath and multi-angle measurement apparatus, including an electrically controlled rotary table, electronically controlled translation tables, a laser transmitting/receiving end face, laser couplers, a multipath data acquisition card, a laser controller, a translation controller, an etalon, a laser, detectors, and a computer. The measurement apparatus uses an all-fiber coupling structure, and two ends of the laser transmitting/receiving end face are respectively fixed on two electronically controlled translation tables. Therefore, a maximum area measured by the apparatus is 350 mm350 mm, and an adjustable minimum translation distance is 1 mm. Bottoms of the translation tables are fixed on the electrically controlled rotary table. Featuring an ingenious design and a compact structure, the whole apparatus is easy to disassemble and easy to operate. The apparatus has high universality, and can implement two-dimensional measurement in a high-temperature combustion flow field.

The present invention discloses a multi-lightpath and multi-angle measurement apparatus, including an electrically controlled rotary table, electronically controlled translation tables, a laser transmitting/receiving end face, laser couplers, a multipath data acquisition card, a laser controller, a translation controller, an etalon, a laser, detectors, and a computer. The measurement apparatus uses an all-fiber coupling structure, and two ends of the laser transmitting/receiving end face are respectively fixed on two electronically controlled translation tables. Therefore, a maximum area measured by the apparatus is 350 mm350 mm, and an adjustable minimum translation distance is 1 mm. Bottoms of the translation tables are fixed on the electrically controlled rotary table. Featuring an ingenious design and a compact structure, the whole apparatus is easy to disassemble and easy to operate. The apparatus has high universality, and can implement two-dimensional measurement in a high-temperature combustion flow field.

This invention relates to an electrical connection device between an electrically conductive member (4A) and a terminal block (6) of an electrical unit (3). The connection device comprises a nut (23A), adapted to receive a screw (21A) which, by screwing, clamps together the electrically conductive member and the terminal block, pressing them against the nut, a core (25A), which is thermally conductive and which is bonded to the nut so as to transfer heat by conduction between the nut and the core, and a support (27A) which supports the nut and the core so as both to hold the nut securely in position and to transfer heat by conduction between the core and the support. The support is made of a material that emits a release containing microparticles and/or at least one gaseous compound when that material is heated above a predetermined temperature threshold.

The present heat-sensitive material is a heat-injectable and electrically insulating material, the heat-sensitive material including a polymer matrix, made of a thermoplastic polymer material or of a thermoplastic elastomer, a plasticizer, having a molar weight (M), and a filler in the form of particles, in particular carbon black. The molar weight (M) of the plasticizer is chosen according to a first predetermined temperature threshold (Ti), such that the heat-sensitive material is configured to release volatile species from the heated plasticizer and filler particles entrained by the plasticizer when the heat-sensitive material is subjected to a temperature higher than the first temperature threshold (Ti), said volatile species from the plasticizer and filler particles being detectable by a detection device.