37results about How to "Reduce the risk of loss of control" patented technology

The invention relates to an emergency falling protector for preventing a cable from falling into a well, and belongs to the fields of petroleum and natural gas well logging and testing. According to the technical scheme, the falling protector consists of a right half part of the falling protector and a left half part of the falling protector, which are connected together through two connecting bolts; a right mushroom head, a right slip segment, a right base and a right conical centering guide are arranged in sequence from the upper end to the lower end of the right half part of the falling protector; a left mushroom head, a left slip segment, a left base and a left conical centering guide are arranged in sequence from the upper end to the lower end of the left half part of the falling protector; the center of the falling protector is provided with a cable hole; slips are arranged on the right slip segment and the left slip segment respectively; the slips are connected with the right slip segment and the left slip segment respectively through countersunk head screws; the middle part of the right slip part is provided with a fastening bolt. The emergency falling protector has the beneficial effects that the cable can be clipped to realize well shutdown, the complicated underground situation caused by falling of the cable into the well can be prevented, the risk of out-of-control blowout is lowered, and the construction safety is enhanced; the clipped cable can be salvaged easily, conveniently and rapidly, and the cost on salvage of the cable falling into the well is lowered.

The invention discloses a lithium ion secondary battery. The lithium ion secondary battery includes a positive pole piece, a negative pole piece, a separator and an electrolyte solution, the positive pole piece includes a positive active material layer, and the negative pole piece includes a negative active material layer. Wherein, the positive electrode active material of the positive electrode active material layer includes a lithium manganese-based positive electrode active material; the negative electrode active material layer and / or the electrolyte include a sulfur-containing compound, so that the sulfur-containing compound is in the negative electrode The active material layer forms a solid electrolyte interface film containing sulfur elements, and the mass percentage v of the sulfur element in the negative electrode active material layer containing the interface film is equal to the mass percentage u of the manganese element in the positive electrode active material. Satisfy: v=0.018u+ω, wherein, the units of u and v are both wt%, and ω is 0.01-2. The lithium ion secondary battery of the present invention can take into account high safety performance, cycle performance and storage performance at the same time.

The invention discloses an unbalanced battery pack charging method considering a temperature. The unbalanced battery pack charging method comprises a battery parameter acquisition and battery temperature estimation part and an unbalanced series battery pack charging control method part considering battery temperature change. Battery characteristic parameter information is obtained by monomer characteristic test, the temperature of each single battery is calculated iteratively by combining the obtained characteristic value and a battery thermal model, a charging current is adjusted according toresidual electric quantity state of each monomer in a battery pack and a battery temperature state estimation result, so that excessively large temperature difference of the monomer of the battery pack or excessively high monomer battery is prevented. The unbalanced battery pack charging method is suitably used for charging application of a series battery pack of an electric vehicle, an energy storage system and the like.

Provided are a signal safety output technology and a recognition method. A dynamic watermark signal is superimposed on a sensing signal, to obtain an output signal of the superimposed watermark signal, and the output signal is output to a control system through a signal line; the control system detects the dynamic watermark signal in the signal, and only the received signal containing the dynamicwatermark signal is considered as a legal signal, or else the signal is illegal; by controlling the amplitude of the dynamic watermark signal, the level of the dynamic watermark signal does not affectthe output signal as the level logic of the legal signal, so the logic level of the received signal can also represent the logic level of the sensing signal. Further, an input signal may be obtainedafter the output signal of the superimposed watermark signal is received, the dynamic watermark signal is filtered out, and the sensing signal is reduced. The signal contains dynamic self-test information, and only one output signal can ensure the safety and reliability of signal output by a sensor, not only is configuration of redundant output lines reduced, but also the safety and reliability ofsignal transmission and use are greatly improved, the anti-interference is higher, and the risk of losing control is low.

A method for controlling a train using a train control system comprises the following steps: obtaining fitting parameters according to train drive related factors (101) which are represented as parameters or coefficients related to a train drive process; acquiring train control data according to the fitting parameters and the factors (102). The method controls the train in a simple manner and prevents the train from being out of control. A device for controlling a train is also provided.

The invention discloses a space debris rope system dragging despinning and removal method, relates to space debris despinning and removal methods and belongs to the technical field of spaceflight. By the adoption of the method, a trailer spacecraft is launched into an orbit, so that the rendezvous with debris is finished; a trailer is connected with the debris through multiple tying ropes; a dynamical model is established, a control law is designed to adjust the nominal rope length of each tying rope to change the tension of the tying ropes, despinning of the debris is achieved through the cooperation of the multiple tying ropes, the situation that the tying ropes are cut and broken through protruding components on the debris is avoided, and the stability and the redundancy of a rope system trailer system are improved; and a trailer engine is used for ignition, reverse dragging force is applied, the space debris is pulled into the atmosphere to be burnt, and therefore debris removal is achieved. By the adoption of the method, despinning of the space debris can be achieved, the situation that the tying ropes are cut and broken through the protruding components on the debris is avoided, and the stability of the system is improved; and in addition, the redundancy of the tying ropes is improved by increasing the number of the tying ropes. The method can be used for space debris despinning and removal and can also be used for despinning of and control over other non-cooperative targets.