57results about How to "Expand the operating area" patented technology

A sewing machine is provided, which includes a table, support posts, upper and lower frames, a head unit, a bed unit, an X-axial head-unit-transport means and an X-axial bed-unit-transport means. An object is placed on the table. The support posts are provided on opposite sides of the table. The upper and lower frames connect the support posts to each other. The head unit is provided on the upper frame so as to be movable in an X-axis direction. The head unit has a head-unit-rotating means for rotating a sewing head. The bed unit is provided on the lower frame so as to be movable in the X-axis direction. The bed unit has a bed-unit-rotating means for rotating a sewing bed. The X-axial head-unit-transport means moves the head unit on the upper frame horizontally. The X-axial bed-unit-transport means moves the bed unit on the upper frame horizontally.

An exhaust gas purifier (10) which includes an NOx catalyst (12) of the selective reduction type and a DPF (14) which have been serially arranged, the purifier being disposed in the exhaust passage (2) of an internal combustion engine. The purifier (10) further includes a passage for urea supply (16) having a hydrolysis catalyst (15) deposited therein and a passage for HC supply (18) having an oxidation catalyst (17) deposited therein, the passages (16) and (18) being disposed in parallel on the upperstream side of both the NOx catalyst (12) of the selective reduction type and the DPF (14). The purifier (10) furthermore includes a urea feeder (20) which supplies urea to the passage for urea supply (16) and an HC feeder (21) which supplies HCs to the passage for HC supply (18). Due to the constitution, the system for exhaust gas purification (1), which employs both the NOx catalyst (12) of the selective reduction type and the DPF (14), reconciles the injection of an ammonia solution with the direct injection of HCs into the exhaust pipe in a compact space.

It is possible to control a DC voltage in accordance with fluctuation of a power source voltage without requiring detection of an effective power source voltage value. A PI control unit (702) performs PI control for a difference (deltaVdc) between a DC voltage instruction (Vdc*) and a DC voltage (Vdc) and outputs a d-axis current instruction value (Id*). A PI control unit (704) performs PI control for a difference (deltaId) between a d-axis current instruction value (Id*) and a d-axis current (Id) and outputs a d-axis voltage instruction value (Vd*). A PWM control unit (709) outputs a switching control signal (G1) which controls a converter switching operation according to the d-axis voltage instruction value (Vd*) and a q-axis voltage instruction value (Vq*). A DC voltage instruction (Vdc*) is generated by a voltage instruction calculation unit (710) according to the d-axis voltage instruction value (Vd*).

The invention discloses a multidirectional fruit picking and collecting integrated device. The device comprises a base, a crawler mechanism, a picking mechanism and a collection mechanism, wherein a rack is arranged on the rack, the picking mechanism is arranged on the rack, a lifting driving mechanism drives the picking mechanism to rise and fall, the picking mechanism comprises a mounting plateand two picking arms arranged on the mounting plate symmetrically laterally, each picking arm comprises a supporting rod, a first stretching arm, a second stretching arm, a rotating picker, a low-siteair cylinder and a high-site air cylinder, the supporting rods are rotationally arranged on the mounting plate, and each rotating picker is arranged at the top end of the corresponding second stretching arm; and the collection mechanism comprises a top end collection net, a sideway collection net and a collection frame. Compared with the prior art, the multidirectional fruit picking and collecting integrated device has the advantages that fruits of multiple heights, multiple angles and different positions can be picked up, high-angle rotation can be carried out on the two picking arms, a picking working area is greatly expanded, and a collection device is integrated with a picking device.

The invention discloses an anchoring intelligent device, belongs to the field of fully mechanized excavation face mechanical and electrical equipment and comprises four parts including a net struttingsystem, an anchoring system, a ground supporting system and a power and turning system, wherein the net strutting system is installed above the ground supporting system; the anchoring system is installed by screws under a main beam and a middle main bear inside the net strutting system; the ground supporting system is installed under the middle beam and the middle main beam inside the net strutting system and provides support for the whole device; and through pin connection, two ends of the power and turning system are connected to the main beam and the middle main beam inside the net strutting system respectively. Further, the robot disclosed by the invention is small in size and compact in structure, has functions of realizing multi-anchor-rod coordinated operations and auxiliary pavement of an anchor net and has high anchoring efficiency; and the device adopts a step-type advancing mode, so that running is steady, turning is flexible and maneuvering performance is good.

The invention discloses a stirring pile ship used for underwater soft foundation construction. The stirring pile ship comprises a double-body ship, a hollow construction work area is arranged between the front end and the tail end of the double-body ship, a longitudinal movement trolley capable of moving in the longitudinal direction of the construction work area is arranged on two ship bodies of the double-body ship, and a transverse movement trolley capable of moving in the transverse direction of the construction work area is arranged on the longitudinal movement trolley. The transverse movement trolley is provided with a stirring device used for working on an underwater soft foundation located below the construction work area. The stirring pile ship has the advantages that the draft and stranding work construction can be conducted in the various conditions with soil, with ebb water flow and without ebb water flow by means of the double-body ship, high bearing and storing buoyancy is achieved, and reliable work stability and adaptability are achieved; a construction device can be used for conducting construction work on the underwater soft foundation needing to be constructed at any time by moving the longitudinal movement trolley and the transverse movement trolley, the work area is large, and therefore the working efficiency is effectively improved.

The invention provides a method for unmanned aerial vehicle relay measurement and control, comprising the following steps: S1. Establishing multiple ground stations, extending the measurement and control range by means of ground station networking, and performing dynamic network access authentication with a unique address identification for the measurement and control airborne equipment ; S2. UAV switches among multiple ground stations, and selects a suitable ground station; S3. Classifies UAV data, and uses different transmission methods for different classification data to transmit to the command center. In the UAV relay measurement and control method described in the present invention, multiple ground stations are networked on the ground to realize uninterrupted handover of UAV control rights, and the command center can continuously monitor the status and video of the UAV; When the drone's range capability exceeds the measurement and control range of a single ground station, the drone's operating area will be expanded, and the random network connection and withdrawal of airborne equipment will be realized to maximize the efficiency of drone inspections.

The invention relates to a method for improving the torque output capability of an AC motor based on improved overmodulation, comprising: a current PI regulator outputs dq-axis voltage vectors Ud and Uq according to id*, iq*, id, and iq; In the field-weakening area, Ud and Uq obtain the αβ-axis voltage vectors Uα and Uβ after coordinate transformation. When the AC motor runs in the field-weakening area, Ud and Uq obtain the dq-axis optimized voltage vectors Udn and Uqn through the voltage optimization method. Udn and Uqn are obtained by After coordinate transformation, Uα and Uβ are obtained; according to the size of Uα and Uβ, it is divided into different modulation areas, and the corrected dq axis voltage vectors Ud* and Uq* are output by Uα and Uβ; finally, space voltage vector modulation is performed to generate switching action signals to control On and off of the IGBT in the inverter. Compared with the prior art, the invention has the advantages of high bus voltage utilization rate, large output torque boost, fast current response speed and the like.