4results about How to "Accurate detection and judgment" patented technology

The invention provides a battery pack, a battery pack acquisition line impedance anomaly detection method and a vehicle, and relates to the technical field of vehicles. An impedance detection loop composed of a detection switch and a first resistor is arranged in a battery pack, a battery management system obtains a first voltage value and a second voltage value of the input end of an analog-to-digital converter of an analog front-end chip by controlling opening and closing of the detection switch, and then the first voltage value and the second voltage value are obtained by combining a preset impedance judgment threshold value. And whether the acquired line impedance is abnormal can be accurately judged. According to the battery pack provided by the invention, early and accurate detection of the impedance abnormity of the acquisition line can be realized, and the situation that the battery management system misjudges the voltage of the battery monomer due to the impedance abnormity of the acquisition line is avoided, so that potential safety hazards such as over-charge, over-discharge, short circuit and thermal runaway caused by unbalance of charge and discharge strategies are prevented, the after-sales maintenance cost is reduced, and the service life of the battery pack is prolonged. And the operation safety and stability of the power battery pack in a new energy electric vehicle, an energy storage system and industrial equipment are ensured.

A bridge pier column detection device belongs to the technical field of bridge detection and comprises a camera and two groups of butt joint units, the rear sides of the two groups of butt joint units are rotatably connected, the front sides of the two groups of butt joint units are connected through a locking unit, each group of butt joint units comprises a semi-ring body, and a connecting rod is vertically mounted on the inner side wall of the semi-ring body. A semi-gear ring is fixedly installed on the outer wall of the connecting rod, the semi-gear ring and the semi-ring body are concentrically arranged, a semi-limiting strip and a semi-limiting base are installed on the outer side wall of the semi-ring body in the circumferential direction, and the semi-limiting strip is arranged above the semi-limiting base. According to the utility model, equidistant shooting and recording can be always carried out relative to the side wall of the pier column through the camera moving in the circumferential direction, the distance equalization between the camera and the pier column during shooting at each angle is ensured, and the final shot picture is effectively connected integrally, so that workers can observe the condition of the pier column accurately and conveniently, and the working efficiency is improved. And the bridge pier quality can be more accurately detected and judged according to the stable shooting effect.

The invention provides a wind driven generator surface damage detection method, system and device and a storage medium, and the method comprises the steps: detecting an obtained to-be-detected surface image of a wind driven generator through a trained YOLOv5EMA model to obtain detection feature data, and carrying out the detection of the surface damage of the wind driven generator according to the detection feature data; and determining the probability of judging the to-be-detected surface image of the wind driven generator as a surface damage image, and judging whether the corresponding wind driven generator has surface damage or not based on the probability. According to the method, the YOLOv5EMA model is utilized, the to-be-detected surface image of the wind driven generator is rapidly and accurately detected and judged, the detection efficiency is improved, and the problems that in the prior art, the surface image of the wind driven generator is manually judged based on experience, the judgment efficiency is low, and the misjudgment rate is high are solved. And adverse effects are generated on the surface damage inspection work of the wind driven generator.

The invention relates to the technical field of transformer substation gas sampling, in particular to a transformer substation monitoring and sampling device which comprises an unmanned aerial vehicle body and a sleeve, the sleeve is fixedly arranged on the bottom face of the unmanned aerial vehicle body, and a fixed cylinder is fixedly connected into the sleeve; a plurality of groups of air storage cylinders are arranged between the sleeve and the fixed cylinder, and the inner wall of the fixed cylinder is fixedly connected with an air inlet pipe for conveying air into the air storage cylinders; the inner wall of the fixed cylinder is rotatably connected with a limiting cylinder, and the limiting cylinder is provided with an intermittent air guide hole communicated with the air inlet pipe; and a gas gathering mechanism is rotationally arranged in the limiting cylinder in a sleeving manner. Through rotation of the limiting cylinder, the gas guide hole can be intermittently and independently communicated with each gas inlet pipe, so that the sampling purity is ensured, the influence on a gas detection result after gas is guided out is prevented, detection and judgment can be accurately carried out, the condition of misjudgment is avoided, the influence on the safety of a transformer substation is prevented, and the safety of the transformer substation is improved. The purity of classified stored gas is achieved, and the inner wall of the gas storage cylinder can be cleaned.