17results about How to "Accurate protection" patented technology

The application discloses an orchard air-blast soil loosening machine, comprising a high-pressure air-blast system, which is connected with a gas storage assembly through a pipeline; the gas storage assembly comprises a gas storage tank, a soil loosening rod and an air-blast drill bit; the air-blast drill bit is centrally controlled, and a pre-splitting structure is arranged on the side wall of the end connected with the soil loosening rod; the pre-splitting metal sheet is made of elastic metal material, is arranged in a semispherical shape, and a plurality of pre-splitting micro-slits are arranged on the side wall. The orchard air-blast soil loosening machine realizes accurate protection of root systems through multi-stage structure design. The pre-splitting metal sheet is made of elastic metal material, can be unfolded from a semispherical shape under the action of high-pressure gas, and the pre-splitting micro-slits increase to form a buffer blasting area; through experimental verification, the direct damage rate of root systems can be reduced by more than 60%. The main air-blast hole is arranged obliquely, and the gas impact force can be guided to the deep soil layer in cooperation with the drill bit cone angle of 30-45 DEG, so that direct impact on the shallow absorbing roots is avoided; compared with the traditional straight-hole air-blast mode, the root system survival rate is increased to 92%.

Embodiments of the present application provide a user property safety risk early warning method, device, medium and product, relating to the technical field of communication. The method comprises: based on the user's operator network behavior data, obtaining the user's communication behavior data, location data and application usage data; generating target features according to the communication behavior data, the location data and the application usage data, and constructing an abnormal feature matrix according to the target features; according to the abnormal feature matrix, using a preset statistical generation model, a deep learning discriminant model and a knowledge-driven rule system, respectively generating a first generation result, a second generation result and a third generation result containing the user's risk state, and determining the user's predicted state result based on the three results, and performing corresponding property safety warning behavior based on the predicted state result. The scheme of the present application solves the problem of limitations in the security attack risk of the old people's telecommunication mode.

The invention belongs to the technical field of data processing, and particularly relates to a sulfur-containing sewage corrosion inhibitor effect evaluation method based on field data processing, and the method comprises the following steps: obtaining environmental physical quantity data of sulfur-containing sewage, and obtaining a corrosion deterioration index by combining reference parameters; acquiring an initial corrosion rate, and acquiring a net corrosion inhibition index in combination with the reference corrosion rate and the corrosion deterioration index; the dynamic environment fluctuation degree is obtained according to the historical corrosion deterioration index, and then the size of the self-adaptive sliding window is obtained; extracting a concentrated trend characteristic and a discrete distribution characteristic of the net corrosion inhibition index in the size interval of the self-adaptive sliding window to obtain a film forming stability coefficient; and comparing the film forming stability coefficient with a preset judgment threshold value, and outputting a corrosion inhibitor efficiency grade judgment result. According to the method, the real protection level of the agent under the complex working condition is objectively restored, so that the efficiency evaluation of the corrosion inhibitor is more accurate.

The utility model provides a battery which comprises a battery cell module, the battery cell module comprises at least two battery cell groups, each battery cell group comprises a battery cell and a sampling resistor which are connected in series, and the at least two battery cell groups are connected in parallel. And the protection module is electrically connected between the battery cell module and the connecting end, is configured to correspondingly obtain the electric power parameter of each battery cell through the sampling resistor, and is configured to cut off the electric connection between the battery cell module and the connecting end when the electric power parameter of any battery cell meets a preset condition. Therefore, according to the battery provided by the invention, the battery cell module can be accurately and reliably protected according to the electric power parameter of the single battery cell, and the safety performance of the battery is improved.

The application discloses a kind of power battery edge fills edge and examines health evaluation and risk early warning method and system.Intermediate equipment is arranged in the direct current charging loop between charger and battery pack, built-in power MOS tube control loop, synchronous evaluation when charging, actively cut off when high risk, realize " edge fills edge and examines edge protection ".Method realizes early warning by electrical baseline acquisition, controllable MOS direct current load applies current step, direct current impedance online calculation, fixed-frequency 1KHz alternating current impedance detection, communication data monitoring and analysis, charging curve monitoring and multi-dimensional fusion evaluation.System includes power loop control, sampling, load, impedance detection, communication, main control.The application adds active protection type direct current monitoring node between charger and battery, does not disassemble battery to complete edge fills edge and examines synchronously, meets the requirement of alternating current internal resistance detection in " lithium ion battery for electric bicycle Health Evaluation Working Guide", realizes the online evaluation of battery health, BMS and charging interface safety.

An adjustable protection level circuit for a frequency converter, belonging to the field of frequency converters, includes: a voltage acquisition circuit, a reference voltage circuit, and a comparison voltage circuit. The voltage acquisition circuit is used to acquire the bus voltage of the frequency converter and use it as the acquisition voltage. The input terminal of the reference voltage circuit is connected to the CPU to receive the reference voltage output by the CPU. The input terminal of the comparison voltage circuit is connected to the output terminals of the voltage acquisition circuit and the reference voltage circuit respectively, and is used to compare the acquisition voltage with the reference voltage and trigger protection action according to the comparison result. This application achieves accurate protection of the protected object (such as voltage and current) by flexibly adjusting the output reference voltage by the CPU through software parameter setting, which is not affected by the temperature of the device error and does not require the replacement of hardware devices.

The invention discloses a wire ingot transfer structure and wire ingot transportation equipment. The wire ingot transfer structure comprises at least one moving assembly, and the moving assemblies are arranged on a mounting frame; the spindle blade is connected with the output end of the moving assembly, and the spindle blade is used for bearing a plurality of silk spindles; and the bidirectional driving assembly comprises a push plate and a power set, the push plate is arranged on the spindle blade in a sleeving mode, and the power set drives the push plate to move in the length direction of the spindle blade. According to the transfer structure, through the collaborative design of the mounting frame, the moving assembly (comprising the horizontal moving unit and the vertical moving unit), the spindle blade and the bidirectional driving assembly, automatic, accurate and flexible grabbing and placing of the silk spindles are achieved. The bidirectional driving assembly arranged in the lead screw is compact in structure, linear motion of the push plate is stable, and wire ingot loading and unloading are efficient. The transportation equipment integrates a transfer structure, a track, power, power supply, a host and a sensing module, and a complete automatic system is constructed. The electric rail-electric brush power supply realizes continuous power supply during movement; and the power module drives stably.

The invention discloses a driving circuit with silicon carbide modules connected in parallel. The driving circuit comprises a microcontroller MCU used for outputting a PWM control signal; the first driving chip and the second driving chip are respectively used for receiving the same path of PWM signals output by the MCU; the first isolation driving power supply and the second isolation driving power supply respectively supply power to the first driving chip and the second driving chip; the first silicon carbide module and the second silicon carbide module are respectively connected with the first driving chip and the second driving chip; a first driving resistor is arranged between the first driving chip and the first silicon carbide module, and a second driving resistor is arranged between the second driving chip and the second silicon carbide module. The first driving resistor and the second driving resistor are used for adjusting the switching speed so as to achieve synchronous switching-on and switching-off. According to the invention, dynamic current sharing of the two silicon carbide modules is ensured.

The invention belongs to the field of wind power equipment, and particularly relates to a wind power tower blade airfoil-shaped auxiliary stress structure which comprises a blade body, an airfoil-shaped auxiliary plate extends out of the side direction of the blade body, the side, close to the root of the blade body, of the airfoil-shaped auxiliary plate is a suction surface, and the side, close to the tip of the blade body, of the airfoil-shaped auxiliary plate is a pressure surface. Comprising a blade body, a wing-shaped auxiliary plate extends out of the side direction of the blade body, the side, close to the root of the blade body, of the wing-shaped auxiliary plate is a suction face, and the side, close to the tip of the blade body, of the wing-shaped auxiliary plate is a pressure face.

The invention discloses a motor rotor temperature estimation method, and the method comprises the steps: obtaining a corresponding operation parameter of a motor at a current moment and the initial temperature of a rotor, inputting the operation transmission and the initial temperature of the rotor into a motor thermal model, and obtaining a first estimation temperature for the rotor; and obtaining a rotor flux linkage of the rotor under the zero-torque working condition, and obtaining a second estimated temperature of the rotor based on the rotor flux linkage and a preset corresponding relation. And if the difference value between the first estimated temperature and the second estimated temperature is greater than the first preset threshold value, taking the second estimated temperature as the temperature of the rotor at the current moment. And when the next estimation moment arrives, the operation parameters of the next estimation moment and the temperature of the rotor at the previous estimation moment (relative to the next estimation moment) are input into a motor thermal model, and the rotor estimation temperature output by the motor thermal model serves as the temperature of the rotor at the next estimation moment. Namely, the estimation accuracy is improved by correcting the estimated temperature of the rotor, so that the rotor is accurately protected.

The application provides a shared contact hole forming method and a semiconductor structure, which comprises the following steps: forming a first hard mask layer on a region requiring a shared contact hole to be formed on a metal gate structure in a semiconductor process, achieving accurate protection of a region at the junction of an active region and a metal gate region, solving the problem of metal gate damage that may be caused in a traditional etching process, and through a step-by-step etching process, stopping the etching endpoint on the first hard mask layer and the second hard mask layer when etching a first interlayer dielectric layer, avoiding the generation of by-products due to over-etching of the metal gate, and completely etching the first hard mask layer and the second hard mask layer to expose part of the active region and the metal gate, finally forming a shared contact hole, achieving sufficient contact between the active region and the metal gate through a conductive layer formed in the shared contact hole, and finally improving the yield and reliability of the semiconductor device.

The embodiment of the invention provides a user property safety risk early warning method and device, a medium and a product, and relates to the technical field of communication. The method comprises the following steps: acquiring communication behavior data, position data and application use data of a user based on operator network behavior data of the user; generating target features according to the communication behavior data, the position data and the application use data, and constructing an abnormal feature matrix according to the target features; and according to the abnormal feature matrix, utilizing a preset statistical generative model, a deep learning discriminant model and a knowledge-driven rule system to respectively generate a first generation result, a second generation result and a third generation result containing a user risk state, and determining a prediction state result of the user based on the three results. And executing a corresponding property safety early warning behavior based on the prediction state result. According to the scheme of the invention, the problem that the security attack risk of the telecommunication mode of old people is limited is solved.

The invention relates to the technical field of network security, in particular to a network equipment IP address geographic position protection method based on graph adjustment, which comprises the following steps: inputting an original graph G (0), a model parameter W of a graph neural network-based IP positioning method, namely GNN-Geo, a target IP node v0, a candidate landmark node set and an adversarial resource upper limit mu; initializing a current graph G (t) = G (0), and setting the modification frequency r = 0; circularly executing the following operations until r is greater than or equal to mu: a) generating an edge set Cedge which is allowed to be modified and a feature set Cfeed which is allowed to be modified; b) calculating a confrontation score of each edge in the Cedge and each feature in the Cfeature; c) selecting the modification operation with the highest score, if the modification operation is edge modification, updating the adjacent matrix, and if the modification operation is feature modification, updating the feature matrix; d) updating the current graph G (t + 1) and the modification frequency r '= r + 1; and outputting the modified graph G (delta). According to the invention, the greedy strategy is used to modify the graph structure and attribute generation adversarial sample in a limited manner, and the positioning error of the IP positioning method based on the graph neural network can be effectively improved.

The invention relates to the technical field of mobile power supplies, in particular to a power supply protection circuit and method and a mobile power supply. Comprising a lithium battery pack, a lithium battery protection module, a DC-DC module, a PMOS tube, an output interface, a master controller, a VBUS voltage detection module and an output interface voltage detection module, the voltage output end of the lithium battery pack is connected with the lithium battery protection module and the DC-DC module, the voltage output end of the DC-DC module is connected with the source electrode of the PMOS tube, the drain electrode of the PMOS tube is connected with the output interface, and the output interface voltage detection module is connected with the output interface. The VBUS voltage detection module is connected with the lithium battery pack, the output interface voltage detection module is connected with the output interface, the output ends of the VBUS voltage detection module and the output interface voltage detection module are both connected with the main controller, and the output end of the main controller is connected with the grid electrode of the PMOS tube; through synchronous acquisition of VBUS voltage and output interface voltage, protection trigger delay caused by single voltage fluctuation is avoided, and protection response is faster. And the risk of continuous output of short circuit / overcurrent caused by unstable judgment is completely eradicated through cooperative judgment of the double-channel signals.

This application provides a 550kV vertical structure insulated metal-enclosed switchgear, belonging to the technical field of enclosed switchgear. The technical solution is a 550kV vertical structure insulated metal-enclosed switchgear, including an insulating bushing electrically connected to an isolating grounding switch. A vertical tank for closing resistors is located outside the isolating grounding switch, containing a closing resistor. Two parallel vertical tanks for vacuum interrupters are located outside the closing resistor tank, each containing a 252kV vacuum interrupter, and each 252kV vacuum interrupter is connected in parallel with a capacitor. The moving contacts of the two 252kV vacuum interrupters are connected in series via a connecting conductor. A driving mechanism is located at the bottom of both the closing resistor tank and the vacuum interrupter tank, enabling synchronous opening and closing of the closing resistor and the 252kV vacuum interrupters. The beneficial effect is that it ensures synchronous closing of the 252kV vacuum interrupters connected in series.

The application discloses a kind of anti-deviation type PCB pad assemblies, belong to PCB assembly technical field.PCB substrate is included;The PCB substrate is provided with solder resist layer, silk screen layer and additive layer;The additive layer is superimposed on solder resist layer;Openings are opened in the solder resist layer, and the openings form pads;The pad is coated with a layer of tin paste;The tin paste layer is placed with a patch component pin;The device is provided with 3D micro-bump, when SMT patch operation is carried out, the micro-bump is blocked from the outside of the pad to the tin paste layer, and the micro-bump can stably constrain the tin paste flow when the patch and reflow welding, then complete the mounting and welding of the patch component, that is, anti-deviation welding can be realized by 3D micro-bump limiting, and stable blocking and limiting can prevent tin paste overflow and component deviation, avoid continuous tin virtual welding and patching, and be beneficial to the improvement of SMT patch production yield.

The application relates to the technical field of crane motion control, and discloses an electric grab bucket protection system and a control method thereof, wherein the system comprises a PLC, an inductive switch, a current transformer, a grab bucket opening AC contactor and a grab bucket closing AC contactor which are electrically connected with the PLC respectively; the current transformer is used for sampling electric grab bucket current information and transmitting the information to the PLC; and the inductive switch is used for controlling whether the current transformer transmits the sampled electric grab bucket current information to the PLC. The application solves the problems of the prior art, such as the incapability of accurately controlling the opening and closing limit of the grab bucket and the poor protection effect.