3results about How to "Wide detection coverage" patented technology

The present application relates to the technical field of module testing, and specifically relates to an IGBT testing circuit, method and device, which comprises a power supply unit, a testing control unit, a state indication unit and a testing docking unit; the power supply unit is provided with an AC input end and a DC output end, and is used for outputting a constant DC voltage; the testing docking unit is provided with a plurality of testing ports, each testing port is electrically connected with a collector, an emitter and a gate of an IGBT to be tested; the testing control unit is electrically connected with the power supply unit and the testing docking unit; the state indication unit is connected in series in a testing control loop and an IGBT main current loop to be tested, and is used for directly displaying the on-off state of the loop. The present application sets four groups of testing ports and arranges them in groups, and is specially used for corresponding to three types of electrodes of IGBT, i.e. gate, collector and emitter, and does not need to repeatedly switch detection probes, the wiring mode is fixed and the operation is simple, the requirement for professional ability of operators is reduced, the wiring efficiency is effectively improved, and the present application is suitable for a fast detection scene.

A kind of optical cable surface detection device, including pedestal and being provided with primary detection mechanism and secondary detection mechanism in top, primary detection mechanism includes primary detection base and primary detection mould, mould placing groove is recessed on primary detection base, and first optical cable transmission through-hole is opened in the center of groove bottom, primary detection mould is placed in mould placing groove and is provided with optical cable detection through-hole in the center, secondary detection mechanism includes secondary detection base and multiple detection components, secondary detection base is provided with second optical cable transmission through-hole, multiple detection components are evenly distributed and are arranged on secondary detection base, one end is fixedly connected with secondary detection base, the other end is inserted into secondary detection base and is connected with detection abutting piece by elastic expansion component.The primary detection mechanism in the application carries out rough detection to optical cable surface, is used to filter the larger bulge on optical cable surface, multiple dynamic detection wheels in secondary detection mechanism are arranged in phase and are closely combined with optical cable surface to carry out fine detection, and detection coverage is wide.

This invention belongs to the field of environmental analytical chemistry, specifically a wastewater analysis method for the simultaneous detection of multiple synthetic cannabinoids and their metabolites. This invention employs a micro-volume direct injection method combined with ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS / MS) for qualitative and quantitative analysis of 72 synthetic cannabinoids and their metabolites in wastewater samples. This invention eliminates the need for complex pretreatment processes such as solid-phase extraction, is simple to operate, has a short analysis time, high sensitivity, and wide coverage, making it suitable for high-throughput monitoring of synthetic cannabinoids in wastewater.