Abstract: The present disclosure provides a direct current (DC) transformer error detection apparatus for a pulsating harmonic signal, including a DC and pulsating harmonic current output module and an external detected input module, where the DC and pulsating harmonic current output module outputs a DC and a DC superimposed pulsating harmonic current to an internal sampling circuit and a self-calibrated standard resistor array; and the internal sampling circuit converts the input DC and the input DC superimposed pulsating harmonic current into a voltage signal, and sends the voltage signal to an analog-to-digital (AD) sampling and measurement component through a front-end conditioning circuit and a detected input channel. The DC transformer error detection apparatus can complete self-calibration for measurement of the DC and the pulsating harmonic signal on a test site.

Abstract: A process for enzymolysis of chicken includes the follow steps: Step 1, processing chicken into small pieces, transferring the small pieces into a reaction kettle, adding water and preheating; Step 2, stirring the chicken preheated in step 1, raising a temperature to 40 to 60° C., adding protease to perform enzymolysis; and Step 3, heating an enzymatic hydrolysate obtained in step 2 to 85 to 100° C., holding the temperature, and terminating the enzymolysis reaction. The protease is a composite flavourzyme including exo-protease produced by fermentation of Aspergillus oryzae and endo-protease produced by fermentation of Bacillus subtilis.

Abstract: A plug connector includes a metal housing, an insulation body received in the metal housing, the insulation body having an insertion slot, a signal terminal disposed in the insulation body, a power terminal disposed in the insulation body, and a metal sheet. The metal sheet is disposed in the insertion slot. The signal terminal and the power terminal are separated from each other by the metal sheet.

Abstract: A navigation method based on ground texture images, an electronic device and storage medium. The method includes: performing transform domain based image registration on an acquired image of a current frame and an image of a previous frame, and determining a first pose of the image of the current frame; determining whether the image of the current frame meets a preset condition, and if so, inserting the image of the current frame as the key-frame image into a map, and performing loop closure detection and determining a loop key-frame image; performing transform domain based image registration on the image of the current frame and the loop key-frame image, and determining a second pose of the image of the current frame; and determining an accumulated error according to the first pose and the second pose, and correcting the map according to the accumulated error.

Abstract: A laser ranging device includes a laser transceiving apparatus, a rotation apparatus, and a power supply control apparatus. The laser transceiving apparatus is used for transmitting a projection beam to a target to be measured and receiving a reflection beam reflected by the target to be measured. As there are no problems of the reflectivity of the reflector itself and the angle offset of the reflection beam, the light utilization is effectively improved. The rotation apparatus drives the laser transceiving apparatus to rotate by electromagnetic induction transmission, making the laser ranging device smaller in size. The power supply control apparatus supplies power to the rotation apparatus, increasing the service life of the laser ranging device, and the power supply control apparatus transmit data with the laser transceiving apparatus through photoelectric conversion.

Abstract: The present disclosure provides a pickup robot, a pickup method, and a computer-readable storage medium. First, obtain a target image captured when a pickup component moves to each slot where a commodity is stored; then, when it is determined, on the basis of the slot identifier in the target image, that the current slot is a target slot which stores a commodity to be picked, screen a commodity identifier from the target image; when the commodity identifier is obtained by means of screening, determine, on the basis of the commodity identifier, the position information of the commodity to be picked up in the target slot; finally, pick up, on the basis of the position information, said commodity from the target slot.

Abstract: Disclosed is a dilating incision device, which relates to a surgical tool and includes an outer shell, a dilating element and an incision assembly. The dilating element that is arranged at one end of the outer shell and communicated with the inside of the outer shell is used to drill into and expand a stenosis segment of the pancreatic or biliary duct or a puncture path between lumens of the digestive tract. A sliding groove is formed in a side wall of the outer shell, by which the inner cavity of the outer shell is communicated with the outside. The incision assembly includes an incision knife arranged in the outer shell and a sliding handle housing the outer shell. An intercommunicating hole is formed in one end of the dilating element, by which the inner cavity of the dilating element is communicated. with the outside.

Abstract: A plug connector includes a metal housing, an insulation body received in the metal housing, the insulation body having an insertion slot, a signal terminal disposed in the insulation body, a power terminal disposed in the insulation body, and a metal sheet. The metal sheet is disposed in the insertion slot. The signal terminal and the power terminal are separated from each other by the metal sheet.

Abstract: The invention provides an electric grid state estimation system and method based on a boundary fusion. The system includes an electric grid data acquisition module, a communication module including a local data unit and a state estimation unit, and a data fusion module, wherein the state estimation unit includes a memory storing a state estimation program and a display displaying a program running and outputting a state variable; the state estimation program is performed to realize an electric grid state estimation; the estimation method includes the following steps of dividing a regional electric grid, then establishing a measurement equation for each region, solving an internal quantity and a boundary quantity, fusing the boundary quantities of two regions, correcting the boundary quantity, performing a non-linear transformation on the intermediate variable, solving the estimated values of the state variable by the least square method, and performing outputting.

Abstract: A navigation method based on ground texture images, an electronic device and storage medium. The method includes: performing transform domain based image registration on an acquired image of a current frame and an image of a previous frame, and determining a first pose of the image of the current frame; determining whether the image of the current frame meets a preset condition, and if so, inserting the image of the current frame as the key-frame image into a map, and performing loop closure detection and determining a loop key-frame image; performing transform domain based image registration on the image of the current frame and the loop key-frame image, and determining a second pose of the image of the current frame; and determining an accumulated error according to the first pose and the second pose, and correcting the map according to the accumulated error.

Abstract: The invention provides an electric grid state estimation system and method based on a boundary fusion. The system includes an electric grid data acquisition module, a communication module including a local data unit and a state estimation unit, and a data fusion module, wherein the state estimation unit includes a memory storing a state estimation program and a display displaying a program running and outputting a state variable; the state estimation program is performed to realize an electric grid state estimation; the estimation method includes the following steps of dividing a regional electric grid, then establishing a measurement equation for each region, solving an internal quantity and a boundary quantity, fusing the boundary quantities of two regions, correcting the boundary quantity, performing a non-linear transformation on the intermediate variable, solving the estimated values of the state variable by the least square method, and performing outputting.

Abstract: A laser ranging device includes a laser transceiving apparatus, a rotation apparatus, and a power supply control apparatus. The laser transceiving apparatus is used for transmitting a projection beam to a target to be measured and receiving a reflection beam reflected by the target to be measured. As there are no problems of the reflectivity of the reflector itself and the angle offset of the reflection beam, the light utilization is effectively improved. The rotation apparatus drives the laser transceiving apparatus to rotate by electromagnetic induction transmission, making the laser ranging device smaller in size. The power supply control apparatus supplies power to the rotation apparatus, increasing the service life of the laser ranging device, and the power supply control apparatus transmit data with the laser transceiving apparatus through photoelectric conversion.

Abstract: The present invention relates to an energy resource-grid-load automatic control system of smart microgrid and control methods thereof, which belong to the field of microgrid control and electrical technology. The energy resource-grid-load automatic control system includes a distributed renewable energy power generation module, a distributed renewable energy inverter module, a conventional power generation module, a user load module, a bidirectional grid-connected control module, a distributed renewable energy intelligent optimizing power generation control module, an energy storage module, an intelligent energy storage unit adjuster and a storage battery pack.

Abstract: An H-bridge micro inverter grid-connected device is invented to solve the problem that failure of any photovoltaic panel on the existing solar photovoltaic system cascade can cause efficiency reduction of the whole photovoltaic panel module. The H-bridge micro inverter grid-connected device comprises a single-chip microcomputer controller, a CPLD controller, a MOSFET full-bridge circuit, a high-frequency transformer, a half-bridge rectifying circuit, an SCR full-bridge circuit and a filter circuit, wherein the MOSFET full-bridge circuit is in the full-bridge type, the high-frequency transformer is a single-phase transformer with a central tap, and the SCR full-bridge circuit is applied. The integral structure above is characterized by the decreasing number of components, the reduction of power switches, and the simplification of the control circuits and driving circuits, so as to decrease the number of full-control switch components, improve the system reliability and reduce the system costs.

Abstract: The present invention relates to an energy resource-grid-load automatic control system of smart microgrid and control methods thereof, which belong to the field of microgrid control and electrical technology. The energy resource-grid-load automatic control system comprises a distributed renewable energy power generation module, a distributed renewable energy inverter module, a conventional power generation module, a user load module, a bidirectional grid-connected control module, a distributed renewable energy intelligent optimizing power generation control module, an energy storage module, an intelligent energy storage unit adjuster and a storage battery pack.

Abstract: An H-bridge micro inverter grid-connected device is invented to solve the problem that failure of any photovoltaic panel on the existing solar photovoltaic system cascade can cause efficiency reduction of the whole photovoltaic panel module. The H-bridge micro inverter grid-connected device comprises a single-chip microcomputer controller, a CPLD controller, a MOSFET full-bridge circuit, a high-frequency transformer, a half-bridge rectifying circuit, an SCR full-bridge circuit and a filter circuit, wherein the MOSFET full-bridge circuit is in the full-bridge type, the high-frequency transformer is a single-phase transformer with a central tap, and the SCR full-bridge circuit is applied. The integral structure above is characterized by the decreasing number of components, the reduction of power switches, and the simplification of the control circuits and driving circuits, so as to decrease the number of full-control switch components, improve the system reliability and reduce the system costs.