9results about How to "Effective realization" patented technology

The utility model relates to the technical field of automobile parts, and provides a shock absorber which comprises a cylinder barrel, a connecting rod extending into the cylinder barrel, an oil seal embedded in a port of the cylinder barrel and matched with the connecting rod, a cover plate arranged outside the port of the cylinder barrel, and a dust cover connected with the cover plate and arranged outside the cylinder barrel in a sleeving mode. Wherein the cover plate and a port of the cylinder barrel are spaced, the shock absorber further comprises a protective cover which is arranged between the port of the cylinder barrel and the cover plate, a base portion of the protective cover is assembled with the port of the cylinder barrel, a lip of the protective cover is sleeved with the connecting rod in a sealing mode, and a condensation cavity is formed between a body of the protective cover and the connecting rod. According to the shock absorber, the protective cover is additionally arranged between the end opening of the cylinder barrel and the cover plate, oil mist condensed on the outer wall of the cylinder barrel and the dust cover due to the fact that oil in the cylinder barrel volatilizes outwards can be prevented, the product appearance and function implementation of the shock absorber are prevented from being affected, a connecting rod and an oil seal of the shock absorber can be protected, and the service life of the shock absorber is prolonged. And external dust is prevented from adhering to the connecting rod, contacting with the oil seal and damaging a sealing lip of the oil seal by friction.

Embodiments of the present application provide an etching device, which can effectively achieve a hole structure at relatively low costs and by using a simplified technological process. The etching device comprises: a multi-hole roller (210), the multi-hole roller (210) being a hollow structure with openings at two ends and an etching liquid being contained within the hollow structure, and the multi-hole roller (210) being provided with multiple holes (211); a pressure roller (220), which is attached to the multi-hole roller (210), is disposed above the liquid level of the etching liquid, and is used for pressing a metal layer (230) to be etched onto the surface of the multi-hole roller (210). During the rotation of the multi-hole roller (210), the etching liquid, by means of at least part of the holes (211) of the multiple holes (211), continuously soaks the metal layer (230) which is in contact with the at least part of the holes (211), so as to continuously etch the metal layer (230) which is in contact with said at least part of the holes (211).

The invention discloses a finite field irreducible polynomial generation method, electronic equipment and a storage medium, and the method comprises the steps: selecting a base field GF (p), and constructing the self-isomorphic mapping of the base field GF (p); determining an irreducible approximate type and an AS polynomial based on self-isomorphic mapping, and solving an equation Xp-X-alpha = 0 to obtain a root a; generating a first irreducible polynomial f based on the irreducible approximate type IS and the root a, and constructing an algebraic expansion domain L of the base domain GF (p); selecting a random element on the algebraic expansion domain L through a quantum random number, and generating a minimum polynomial g; and generating a polynomial gx based on the minimum polynomial g, finally verifying whether the polynomial gx is an irreducible polynomial, and if yes, outputting the irreducible polynomial. According to the method, the probability that the constructed polynomial is an irreducible polynomial can be greatly improved; and meanwhile, real randomness is realized by utilizing quantum random characteristics, so that the method is further used for quickly constructing a hash function, and a basis is provided for unconditional quantum security.

The present invention provides a fan-out type packaging structure and a manufacturing method thereof. The fan-out type packaging structure includes a redistribution layer, at least one plastic encapsulation layer, at least one first shielding layer, at least one chip and at least one electrical connector. The redistribution layer includes a grounding circuit layer, the chip and the electrical connector are arranged on the first surface of the redistribution layer, the electrical connector is located outside the chip and is electrically connected to the grounding circuit layer; the plastic encapsulation layer is arranged on the first surface of the redistribution layer, encapsulating the electrical connector and the chip; the first shielding layer at least partially covers the side surface of the plastic encapsulation layer; the electrical connector is at least partially exposed to the side surface of the plastic encapsulation layer and is electrically connected to the first shielding layer, and the first shielding layer and the grounding circuit layer are electrically conductive through the electrical connector. The first shielding layer is connected to the grounding circuit layer through the electrical connector, so that the electrical connector can be used to achieve relatively large-area surface contact with the first shielding layer and the grounding circuit layer respectively, reducing the resistance between the three, thereby improving the shielding effect.

A hydraulic system for an automatic leveling test bench, wherein four supporting hydraulic cylinders are connected to the lower support frame; the piston rod of the supporting hydraulic cylinder is fixedly connected to the bearing disc; four connecting steel pipes are hinged at the lower part of the upper support frame, and every two connecting steel pipes are fixedly connected to the two ends of the upper crossbeam, and the end of the upper crossbeam is fixedly connected to the sliding shoe provided on the bearing disc through supporting bolts; the horizontal inclination sensor is installed in the middle of the upper frame; the controller is respectively connected to the four supporting hydraulic cylinders through four electromagnetic proportional reversing valves, and is also respectively connected to the leveling hydraulic cylinder through four electromagnetic proportional reversing valves; a displacement sensor is arranged on the supporting hydraulic cylinder, and a hydraulically controlled reversing valve and a variable throttle valve are arranged on the oil circuit where the rodless cavity of the supporting hydraulic cylinder is located; a displacement sensor and a speed sensor are arranged on the leveling hydraulic cylinder. The system can simulate various road surface unevenness, and can simulate different vehicle travel speeds, and can verify the leveling effect in real time during the test.

The present invention provides a punching mechanism for a mushroom stick inoculator, comprising an inoculation frame, a punching mechanism arranged on the inoculation frame, the punching mechanism comprising a punching unit and a bag pressing unit, the punching unit comprising a punching needle assembly slidably arranged above the inoculation frame and a punching motor arranged below the inoculation frame, the punching motor is connected to a punching shaft, and punching rocker arm assemblies are respectively arranged between the two ends of the punching shaft and the punching needle assembly; the bag pressing unit comprises a bag pressing plate elastically sliding up and down on the inoculation frame and a bag pressing shaft rotatably arranged on the inoculation frame, a chain transmission is used between the bag pressing shaft and the punching shaft, the speed ratio of the bag pressing shaft and the punching shaft is 1:2, and bag pressing rocker arm assemblies are respectively arranged between the two ends of the bag pressing shaft and the bag pressing plate. The present invention can simultaneously drive the punching unit or the bag pressing unit to move by a punching motor, can save space occupied by the equipment, and has more convenient, flexible and reliable control, and has high practical application and promotion value.

The invention relates to an inverter (100) for controlling an electric machine (500), comprising a high-voltage branch (110), a low-voltage branch (120) and a replacement supply branch (130), the high-voltage branch (110) being connected to the low-voltage branch (120) by means of an operating DC voltage converter (10), the low-voltage branch (120) being connected to the replacement supply branch (130) by means of a replacement supply DC voltage converter (20), wherein the inverter circuit (115) is connected to the high-voltage branch (110), the inverter circuit (115) and the safety control device (123) are supplied with energy by the low-voltage branch (120), and the safety control device (123) is arranged to switch the inverter circuit (115) into a safety state in the case of switching off. Wherein the inverter circuit (115) and the safety control device (123) are supplied with energy or can be supplied with energy by the alternative supply branch (130).

The present application relates to a kind of positioning identification method and device for power equipment abnormal sound monitoring, the method first defines spherical coordinate system, determines the number of microphone in spherical microphone array and the coordinate position of each microphone thereof;Then construct the ideal sound signal model of spherical microphone array, and construct the transfer matrix of focusing surface and array surface based on this in turn obtain noise source intensity solving equation, since focusing surface division point number is much more than array microphone number, so the equation is underdetermined equation group;Finally, construct block sparse bayesian learning optimization framework and solve to obtain source intensity coefficient vector, finally achieve the reliable monitoring and accurate positioning of power equipment abnormal sound.The present application compared with prior art, overcome the deficiency that conventional planar array is difficult to realize flexible autonomous positioning of three-dimensional space sound field, can effectively improve the positioning accuracy of space sound field, and still can guarantee good anti-interference performance in low signal-to-noise ratio environment.