Abstract: A method for defrost control of a refrigerator having a refrigeration and defrost system that includes a compressor, an evaporator, an evaporator fan and a heater. The refrigerator also has a control system to control the operation of the refrigerator. The method includes stopping the compressor operation; starting a defrost process; starting the heater; maintaining a start state over a preset period of time; closing off the heater; and starting the compressor. After starting the compressor and before the evaporator fan is started to perform the refrigeration operation, the evaporator fan is operated at least once briefly and intermittently.

Abstract: An air conditioning system for a vehicle and a method for operating the air conditioning system are disclosed, which at least has: an air conditioner (3) having a fan, a recirculating air flap (4) for setting a recirculating air operation or an external air operation, a gas sensor (5) for measuring a gas concentration, in particular a CO2 concentration in a vehicle cabin, and outputting a measuring signal (S4), and a control unit (2) for receiving the measuring signal (S4) of the gas sensor (5), for setting a recirculating air position or an external air position of the recirculating air flap (4) and for controlling the gas sensor (5), the control unit (2) switching the gas sensor (5) into different operating modes in recirculating air operation than in external air operation.

Abstract: A heat exchanger includes an air channel configured to receive air from an equipment rack. A fluid circuit is provided having a bi-phase coolant flowing therethrough. The fluid circuit includes a coolant channel coupled to the equipment rack and positioned adjacent to the air channel. The bi-phase coolant is part liquid and part gas as the bi-phase coolant flows through the coolant channel. The bi-phase coolant is configured to condition the air flowing through the air channel.

Abstract: A system for regulating the amount of outdoor air that is introduced into a building determines characteristics of the outdoor air using sensor inputs. The system uses extremum seeking control logic to vary the flow of outdoor air provided into the building in response to the cooling load determinations.

Abstract: A water dispensing system for a refrigerator comprising a refrigeration compartment includes a manifold assembly, a monitoring device coupled to the manifold assembly and including at least one sensor, and a filter assembly including a filter housing removably mounted to the manifold assembly. The filter assembly is configured to be compatible with a plurality of suitable filter media. At least two indicators are in signal communication with the at least one sensor when the filter housing is mounted onto the manifold assembly. A controller is operatively coupled to the monitoring device. The controller is configured to identify the filter assembly and the filter medium based on a signal received from the at least one sensor and operate the water dispensing system based on the identification of the filter assembly and the filter medium.

Abstract: A refrigeration apparatus performs heat exchange on a water tube system having a water inlet tube leading exterior water to a water branching point, first and second branching water tubes extending from the water branching point, and a water outlet tube leading to the exterior from a convergent point of the first and second branching water tubes. Active refrigerant is in a supercritical state in at least part of a refrigeration cycle. The refrigeration apparatus includes a main expansion mechanism connected to an evaporator, first and second compression elements connected by a first refrigerant tube, a first heat exchanger exchanging heat between the first refrigerant tube and the first branching water tubes, second refrigerant tubes connecting the second compression element and the main expansion mechanism, and a second heat exchanger in which the second refrigerant tubes exchange heat with the second branching water tubes and does not exchange heat with the water inlet tube.

Abstract: A self-contained vehicle refrigeration console includes an interior section mounted below the vehicle roof and including evaporator and compressor sections, and an exterior section mounted on the outer surface of the roof and supporting the condenser fan but providing a low vertical profile. The roof has two openings formed therein, one being adapted to receive a condenser coil therein and the other being located below the condenser fan. The condenser fan causes ambient air to flow under the exterior section, through said one opening and condenser coil, under the vehicle roof, and out the other opening to the ambient.

Abstract: A heat exchanger includes an elastically flexible liner formed as an elongated hose having an open end and a closed end. The elongated hose defines an inner surface. The heat exchanger also includes a plurality of longitudinal sleeves substantially disposed within the elongated hose. Each of the plurality of longitudinal sleeves has a proximate end defining an inlet opening and a distal end defining an outlet opening. When a fluid is pumped from the inlet openings of the plurality of longitudinal sleeves to the outlet openings of the plurality of longitudinal sleeves, the fluid passes from the outlet openings into the closed end of the elongated hose, along the inner surface of the elongated hose, and out through the open end of the elongated hose.

Abstract: A heating and cooling system includes an evaporator, a compressor, and a condenser. A heat exchanger, which may be an outdoor heat exchanger, is configured to receive the refrigerant from the condenser, to selectively extract heat from or to add heat to the refrigerant, and to transfer the refrigerant to the evaporator. First control valving, disposed between the condenser and the heat exchanger, is configured to regulate flow of the refrigerant from the condenser to the heat exchanger in a first mode of operation. Second control valving, disposed between the condenser and the heat exchanger, is configured to regulate flow of the refrigerant from the heat exchanger to the evaporator in a second mode of operation. The system may be operated in a variety of modes by appropriate control of the valving and other system components.

Abstract: The present invention relates to a dual centrifugal chiller, and it is an object of the present invention to provide a dual centrifugal chiller which is configured so that a turbo chiller having two compressors, two evaporators and two condensers lowers the head of the compressors, and that the compressors are operated with the same heads. The above object can be accomplished by the provision of a dual centrifugal chiller in which chilled water passes through a first evaporator and then through a second evaporator, cooling water passes through a first condenser and then through a second condenser, a first compressor accommodating a refrigerant connects said first evaporator and said second condenser, and a second compressor accommodating a refrigerant connects said second evaporator and said first condenser.

Abstract: There is provided an ice maker and a water purifier having the same capable of effectively making ice using two water trays. The water purifier having an ice maker includes a water tray member comprising an ice-making water tray holding ice-making raw water to make ice using an ice-making unit, and an auxiliary water tray holding ice-making raw water remaining in the ice-making water tray in the course of cooling the ice-making raw water by means of the ice-making unit and removing the ice-making raw water from the ice-making water tray; an ice reservoir storing ice made in the ice-making unit; a cold water storage tank cooling water held therein using the ice made in the ice-making unit; and a guide member guiding the ice made in the ice-making unit so that the ice is selectively fed to either the ice reservoir or the cold water storage tank.

Abstract: An electric energy saving equipment comprising a coolant compressor, a heat pump, a four way valve, a heating/cooling heat exchanger, an expansion valve, four check valves, an indoor unit of split type air conditioner and piping system for assembling the aforesaid parts and components, which structural improvement for electric energy saving is employed the four check valves to control the coolant to flow or to stop flow in different pipes and then to form an electric energy saving equipment possessing the function of waste heat recovery, house cooling, house heating, indoor air conditioning, indoor heating and dehumidification.

Abstract: The invention relates to a compact vehicle HVAC system including an evaporator unit, a condenser unit, and a component unit, as well as a refrigerant circuit. The evaporator unit and the condenser unit each are provided with air-passed heat exchangers and a fan in a casing. Further circuit components are displaced within the component unit. The casings of the evaporator unit, the condenser unit, and the component unit advantageously establish a connected compact casing arrangement. The heat exchangers are displaced within the compact casing arrangement. The refrigerant circuit is established for a combined refrigeration plant and heat pump operation as well as an afterheating operation, whereby in the afterheating operational mode the heating power of the afterheater established as condenser/gas cooler and the cooling power of the evaporator are controllable independently of each other.

Abstract: The present invention provides a refrigeration cycle apparatus using a first compressor and a second compressor driven by an expander and including a high and low pressure heat exchanger, in which a low-pressure-side outlet of the high and low pressure heat exchanger is bypassed to a low pressure portion or an intermediate pressure portion to adjust an inlet density at the expander and thereby provide high efficiency. The high and low pressure heat exchanger of the refrigeration cycle apparatus of the present invention changes an amount of heat exchange between a high-pressure refrigerant and a reduced-pressure refrigerant branched from the high-pressure refrigerant at an inlet portion of the high and low pressure heat exchanger and reduced in pressure to adjust the density of the refrigerant flowing in the expander so that power recovered by the expander and power required by the second compressor match.

Abstract: A refrigerating apparatus, where refrigerant reaches a supercritical state in at least part of a refrigeration cycle, includes at least one expansion mechanism, an evaporator connected to the expansion mechanism, first and second sequential compression elements, a radiator connected to the discharge side of the second compression element, a first refrigerant pipe interconnecting the radiator and the expansion mechanism, a heat exchanger arranged to cause heat exchange between the first refrigerant pipe and another refrigerant pipe. Preferably, a heat exchanger switching mechanism is switchable so that refrigerant flows in the first refrigerant pipe through the first heat exchanger or in a heat exchange bypass pipe connected to the first refrigerant pipe.

Abstract: A condensed mixed hydrocarbon feed stream (10), recovered from an initial feed stream (8), is fractionated into one ore more fractionated streams. In this process, the condensed mixed hydrocarbon feed stream (10) is separated into at least a first part-feed stream (20) and a second part-feed stream (30). The first part-feed stream (20) is passed into a first gas/liquid separator (14), to provide at least a first fractionated stream in the form of a first gaseous overhead stream (40). A first bottom liquid stream (50) provided by the first gas/liquid separator (14) is passed into a second gas/liquid separator (22) to provide at least a second fractionated stream in the form of a second gaseous overhead stream (70), which is cooled by heat exchange (26) against the second part-feed stream (30).

Abstract: A system and method for removal of a contaminant comprising removing a liquefied portion of a refrigerant stream comprising nitrogen from a reverse Brayton cycle refrigerant system, introducing the liquefied refrigerant stream into a contaminant removal column as a reflux stream removing a contaminant stream from the bottom of the contaminant removal column, removing a vapor stream enriched in nitrogen from the top of the contaminant removal column, and introducing the vapor stream enriched in nitrogen back into the reverse Brayton cycle refrigerant system.

Abstract: A method for removing hydrogen sulphide (H2S) from a natural gas stream comprising methane (CH4) and H2S comprises:—cooling the natural gas stream in a heat exchanger assembly (13,16,18);—feeding at least part of the cooled natural gas stream through a feed conduit (19,21) into a cyclonic expansion and separation device (1) in which the cooled natural gas stream is expanded in a nozzle (4) and thereby further cooled to a temperature and pressure below the dew point of H2S and is separated by inducing the cooled natural gas stream to swirl in a tubular separation chamber (9) thereby inducing centrifugal forces to separate the cooled natural gas stream into a cooled low density fluid fraction, which is H2S depleted and methane enriched, and a cooled high density fluid fraction, which is H2S enriched and methane depleted;—feeding the cooled low density fluid fraction to a product gas conduit (33) which is connected to the heat exchanger assembly (14) for cooling the natural gas stream fed to the cyclonic expansi

Abstract: An apparatus for producing a glass-coated wire, the apparatus comprising at least one heating device adapted to, independently, heat a core material to a melting temperature thereof and heat a glass material to a drawing temperature thereof.

Abstract: A silica-based multi core optical fiber and a fabrication method for the same are provided, and include two or more cores of GeO2—SiO2 glass including an fluorine concentration not less than about 15 w % and a germanium concentration about 0.05 wt % to 2 wt %, in a core. A relative refractive index difference of a cladding and a core is not less than about 3%; and a ratio of a cladding diameter to a core diameter is about 1.02 to 3.0. A silica-based single core optical fiber is also provided, and includes a core having a germanium concentration not less than about 15 wt % and an fluorine concentration about 0.05 wt % to 2 wt %.

Abstract: Flow block (1), intended for a fiberizing installation and for receiving molten material, comprising a single cavity (10) which has a flow channel (11) bounded by a wall (11a). The inlet orifice (12) has a shape which is asymmetrical with respect to the mid-plane (Y) of the block extending along the shortest extension and has an upstream part on the glass inflow side which is wider than its opposite downstream part with respect to the mid-plane. Furthermore, the slope of the wall (11a) on the upstream side is advantageously steeper than the slope of the downstream side. The invention also relates to the bushing block, which is very squat compared with the flow block.

Abstract: A laundry treatment machine includes a load determining device configured to determine a weight of a load disposed inside the machine. The load determining device includes a first force measuring device configured to sense a total weight of the machine with objects disposed therein and thereon, and a second force measuring device configured to sense a weight of the object disposed on the machine.

Abstract: Disclosed herein are a motor usable with a washing machine to assure interchangeability of constituent elements thereof and a washing machine having the same. The motor includes a stator mounted to a tub of the washing machine, and a rotor to rotate a drum of the washing machine. The stator includes a stator core, first and second insulators arranged to cover the stator core, and a plurality of mounts to couple the stator to the tub. The plurality of mounts is selectively provided at one of the first insulator and the second insulator.

Abstract: A washing machine including a vibration reduction member formed in a stator is provided. Therefore, when a motor rotates according to operation of the washing machine, delivery of a vibration due to a repulsive force of the stator to a bearing housing can be efficiently reduced. Further, a vibration of a tub fastened to the bearing housing due to the vibration is prevented and noise due to the vibration of the tub is reduced.

Abstract: A receiver lock assembly has a shaft assembly and a lock head assembly. The lock head assembly comprises a fixed cam, steel balls and a movable cam. The movable cam includes a first end that can be rotated by a lock. In one lock position, the movable cam, which has each of the balls received within an aperture, is movable within the fixed cam in a first position and the cam is rotated such that the balls can be received by apertures within the fixed cam. In a second position, the fixed cam includes sloped apertures where, when the cam and balls are rotated, the balls engage a circumferential groove within the end of the shaft assembly. The rotating cam and the fixed cam allow the balls to move into and out of engagement with the grooved shaft on the shaft assembly to lock and unlock the head and shaft.

Abstract: A catalytic converter theft deterrent assembly (100) used with a motor vehicle includes a plurality of clamps (109) for attaching to a section of exhaust pipe (101) used with a catalytic converter (105). One or more wire ropes (113) may be fixedly attached to the plurality of clamps (109) for surrounding portions around the perimeter of the exhaust pipe (101). A plurality of collars (111) are fixedly attached to the plurality of clamps (109) for housing an end portion of the plurality of cables (113) such that the cables prevent removal of the exhaust pipe (101) connected to the catalytic converter (105) for deterring theft.

Abstract: A door lock includes a first driven wheel connected drivenly to a motor and having two resilient driving elements, and a second driven wheel connected drivenly to a rotary handle and the first driven wheel. The second driven wheel has a driven element disposed between and driven by the driving elements so that the second driven wheel moves to a first or second position to place a latch bolt in a latching or unlatching position. When the latch bolt is jammed, the second driven wheel is inoperative. However, as the driving elements are resilient, the first driven wheel can continue its rotation without being obstructed.

Abstract: A car handler lock mainly includes a vertical frame having an approximately U shape cut, and a lock device is arranged to the opening of the approximately U shape cut. The car handler lock also includes a buckle body. The buckle body includes a sheet shield unit and a bridge buckle arranged between the shield unit and the lock unit of the vertical frame. The bridge buckle will cover the linking gaps between the shield unit and the vertical frame while the bridge buckle is locked to the lock device. The approximately U shape cut of the vertical frame will be slid in and fixed to a shaft of the car handler, and the bridge buckle of the buckle body will be locked to the lock device so that the shield unit will provide an all-round protection to the car handler. The lock assembly is light and convenient by its sheet components.

Abstract: The present invention relates to a process to purify enzymatically digested heparin-derived protein hydrolysate (peptone) comprising the step of passing the peptone through a nanofilter at a temperature of about ambient to about 130° F. and a pressure of about ambient to about 360 psi resulting in peptone concentrate.

Abstract: A method and apparatus for manufacturing a two-part article from a cup (1) formed from a single sheet metal blank. The method includes forming a “V”-shaped groove (15) by pressing and rolling an anvil (25) on one side of the cup sidewall (3), against one or more cutting rings (21) on the opposite side of the sidewall. Generally, this stage is followed by a second stage, which cuts the cup (1) into a separate ring (11) and shallower cup (10). This second stage enables profiled edges (17, 18) such as slight bends or flares to be formed which are beneficial when flanging or curling of the edges is subsequently required.

Abstract: A rotary stamper includes an upper die plate assembly, a lower die plate assembly, and a support frame having a drive assembly that moves the upper die plate horizontally and vertically along a generally circular pathway while moving the lower die plate along a linear horizontal pathway. The upper die plate is vertically slidably connected to the lower die plate by way of one or more vertical rods that extend from the lower die plate assembly up through the upper die plate. In operation, the lower die plate matches the horizontal movements of the upper die plate as the latter is moved along its circular pathway. Concurrently, the upper die plate moves towards and away from the lower die plate. This maintains a substantially constant alignment between the die plates for carrying out a periodic machining operation on a moving web of material passing there between.

Abstract: The invention relates to a method and device for bending flat metal workpieces, especially steel sheets, by bending freely over edges along a bending line with a straight, linear movement of the tool, wherein the bending edges are arranged parallel to the longitudinal direction of the sheet and the tool is displaced along the width of the metal sheet, characterized by the steps: inserting a punch between the bending edges of a die, holding the punch at the lowest point of the bend, applying compressive stress in order to level out the stresses in the shaping zone produced by the bending and incrementally superimposing the tensile stress with compressive stress, that is effective along the bending line in the direction of the sheet width of the bent workpiece, wherein the tool producing the compressive stress is moved along the bending line in the direction of the sheet width.

Abstract: A method and apparatus for producing steel bars that are cut to length in response to a customer order. The method includes producing a continuous length of steel bar from a rolling mill, cutting the continuous length of steel bar into successive segments, each representing a multiple of the length of the bar of the customer order, cutting the segments in in-line cold shears first into two times the length of the bar of the customer order and then in half into lengths equal to the length of the bar of the customer order while maintaining the production of the continuous length of steel bar produced by the rolling mill, and bundling the bars of the length of the customer order for discharge from the mill.

Abstract: Pipe to be upset is conveyed via walking beam though a series of induction heating coils and one end is heated to a maximum temperature of 2350 degrees F. Thereafter, a robot transports the pipe into a forging machine where the pipe end is upset in one or more die pockets. For those types of pipes where the pipe end temperature falls below an acceptable temperature during upsetting, the robot delivers the pipe end to an auxiliary induction heating coil and is re-heated to an acceptable forging temperature. The robot then transports the pipe back into the forging machine where the pipe end is forged to its final upset dimensions.

Abstract: A method is provided for making a composite part layup tool. A surface of a base is shaped and used as a tool to incrementally form a metal sheet. The formed metal sheet is friction plug welded to the shaped surface on the base to form a metal tool surface of the layup tool.

Abstract: A die cushion device includes a cushion pad, a support section, a servomotor, and a shock absorber device. The support section supports the cushion pad. The servomotor raises and lowers the support section for raising and lowering the cushion pad. The shock absorber device includes a damping section and relieves shock between the cushion pad and the support section. The damping section generates reaction force in accordance with the relative speed of the cushion pad with respect to the support section.

Abstract: Any of various features of a workpiece are forged by a common set of tools. The feature is incrementally forged as the tool set is moved to successive forging locations on the surface of the workpiece. One of the tools is used to plasticize and extrude a portion of the workpiece while one or more of the other tools are used to form dams that contain and shape the extruded portions.

Abstract: A method and apparatus for calibrating a gas chromatography instrument by forcefully shooting a measured droplet which securely passes through a confined passageway without direct intervention of human hands into the entry throat of the instrument so as to avoid contaminating the apparatus or impairing the accuracy of the instrument.

Abstract: A universal air bubble detector allows for use with a variety of sizes and types of tubing. The detector maintains proper alignment of a sensor emitter and receiver with different sizes of tubing. The detector may be mounted on existing equipment or may be used to monitor a tubing at any position along the tubing, and may operate in a stand alone mode or in combination with existing equipment.

Abstract: The invention relates to a method for monitoring and controlling the regeneration of a particle filter in an exhaust gas duct of an internal combustion engine, wherein said regeneration of the particle filter takes place by means of an oxidative burning off of particles during a regeneration phase. Provision is made according to the invention for the internal combustion engine to be operated at a lean operating point at least intermittently during lean operating phases or during a mixture oscillation and for the regeneration of the particle filter to be monitored during the lean operating phases or during the mixture oscillation via the temporal course of a second signal of a second lambda probe disposed in the exhaust gas direction downstream of said particle filter or of a second parameter derived therefrom in comparison to the temporal course of a first signal of a first lambda probe disposed in the exhaust gas direction upstream of said particle filter or of a first parameter derived therefrom.

Abstract: A ductless fume hood suitable for the removal of various chemical materials including toxic and non-toxic gases, vapors, particles, dust and unpleasant odors from a fluid stream. The ductless fume hood uses electronic devices and software to enable real time monitoring of gas levels in parts per million.

Abstract: A measuring system for in-situ measurements down a well (1) by a spectrometer (4) is provided. The spectrometer (4) includes a radiation source (5) and a detector (6). A probe (15) optically connected to the spectrometer (4) and includes an optical pathway (7) for transmission of a radiation from the radiation source (5) and at least a second optical pathway for transmission of a characteristic radiation from a sample to the detector (6). A positioner is provided to position the probe (15) near a side surface (11) of the borehole (3) and to optically couple the optical pathways (7) to the side surface (11), wherein the probe (15) is traversable up and down the well (1) by way of a guide operatively connected to the probe (15) and to a fixed location at the wellhead. By use of the apparatus and method a concentration of methane or other substance of interest is obtained, and thereby, a potential production of a coal bed methane formation is obtained.

Abstract: The invention relates to a method for characterising the knock-resistance of a fuel using a test engine, wherein the curve against time of the cylinder pressure of the test engine during combustion of the fuel in the test engine is determined and the determined pressure signals are compared with the corresponding pressure signals of a least one standard fuel of known knock-resistance.

Abstract: The invention proposes a system for obtaining information relating to a pipe (4) conveying a flow of fluid (28), and/or relating to the fluid. This system comprises a module (1;30) comprising means (10) of acquiring data, subsequent analysis of which makes it possible to obtain information relating to the pipe and/or the fluid, and means (11) of storing the data which said data acquisition means acquire, the self-contained module being arranged to be pushed by the fluid flow after being introduced into the pipe. It also comprises a mechanical link (2) which is connected to the self-contained module and accessible from outside the pipe.

Abstract: The present invention relates to a method for detecting a defective sandwich component, particularly in aircraft construction, the method comprising the following steps: forming at least one measuring chamber in a core arrangement of a sandwich component, said at least one measuring chamber having an outwardly open end; subjecting the at least one measuring chamber to a predetermined pressure; and detecting and evaluating the pressure forming in the at least one measuring chamber.

Abstract: An apparatus of measuring viscosity and/or elasticity comprising: an electro-conductive rotor; a container that contains a sample and the rotor such that the rotor is arranged in the sample; a magnet unit that is arranged in the surrounding of the container and applies a magnetic field to the rotor; a rotation controlling unit that drives the magnet unit to apply a rotating magnetic field to the rotor so as to induce induced current in the rotor and rotate the rotor by providing the rotor with a rotation torque caused by Lorentz interaction between the induced current and the magnetic field applied to the rotor; a rotation detection unit that detects the rotation of the rotor; and a dynamic property detection unit that detects viscosity and/or elasticity of the sample being in contact with the rotor based on the rotation torque and the rotational movement.

Abstract: Characterizing material properties using a simple and inexpensive measurement circuit is disclosed. It allows measurement of the transfer function change of an acoustic wave device without necessitating detailed knowledge of the resonant frequency, by integrating the transfer function. If one examines the integral of the transfer efficiency of an acoustic wave device as the acoustic wave is damped, one sees that the magnitude of the total signal transfer decreases with increasing damping allowing derivation of the material parameters from the results of simple integration.

Abstract: Disclosed is a fluid analysis chip including a microchannel formed within the chip. The chip includes a sample and a sample outlet communicating with an outside of the chip, and has a structure where the sample inlet and the sample outlet communicate with each other through the closed channel. An expanding part formed in a longitudinal direction of a channel in such a manner that a pair of inner walls corresponding to each other has a larger sectional area at a part or a whole thereof is formed. Therefore, fluids, which pass through the channel adjacent to the expanding part, move while making contact with only another pair of inner walls of the channel, which correspond to each other.

Abstract: The invention relates to a test element for the testing of a liquid sample. The test element includes a sample application area, a test field, a sample transport path extending between the sample application area and the test field and an actuator field including a electrically-conductive layer. The actuator field is switchable between a first state attracting the sample and a second state attracting the sample less by applying to the conductive layer an electric voltage that is different from an earth potential. The actuator field has a section that is arranged at about the same distance from the sample application area as the test field, measured along the sample transport path, such that a wetting of the test field by the sample can be controlled by applying a voltage to the actuator field.

Abstract: Disclosed herein is an apparatus and method for measuring the center of gravity of slabs. The apparatus for measuring the center of gravity of slabs includes a main system, a gravity center measurement system, and an unmanned crane. The main system provides information about the dimensions and/or weight of each of a plurality of slabs loaded in a vehicle. The gravity center measurement system includes a photographing unit for photographing the loaded slabs to be moved, a driving unit for moving the photographing unit up and down, and a control unit for calculating the center of gravity and grip position of all of the slabs, to be moved each time, based on information about a position and configuration of each of the slabs from the photographing unit and the information about the dimensions and/or weight of each of the slabs from the main system. The unmanned crane grips and moves the slabs according to the grip position information calculated by the gravity center measurement system.