100 results about "Middle group" patented technology

The invention discloses an onboard goggle-type helmet display optical system, and provides a large-field optical display system. The optical display system comprises an image source, a relay lens assembly, a prism assembly and a concave surface reflector along optical axis direction in sequence, wherein, the concave surface reflector receives and reflects image light of the image source from the prism assembly; the concave surface reflector has a bending angle corresponding to the image source, thus asymmetric astigmation is generated in the reflection image; the bending angle is defined as an included angle between an optical axis and a normal line of each point of the inner surface of the concave surface reflector; the relay lens assembly is composed of three groups of a front group, a middle group and a rear group; each group respectively comprises a plurality of lens; the front group closes to the prism assembly, the rear group closes to the image source, and the middle group is positioned between the front group and the rear group in the optical axis direction; the three groups of the front group, the middle group and the rear group can be respectively used as a whole to translate and rotate to form a crossing angle between the local area shafts of the front group lens, the middle group lens and the rear group lens, thus compensating the asymmetric astigmation of the optical display system.

The invention relates to an online monitoring method for fouling degree of a flow passage of a steam turbine, which is characterized by comprising the links of data acquisition, main steam flow calculation, back-heating system parameter correction and diagnosis of the fouling degree of the flow passage, and comprising the following steps of: for each middle group, comparing the front and back pressure ratio of each group obtained by online monitoring with the front and back pressure ratio of each group when the flow passage is in a normal state by using the current back-heating extraction pressure measuring point of each level in the running of the steam turbine through the links so as to judge the fouling state of the flow passage of each middle group of the steam turbine; for the final group, comparing the pressure before the final group obtained by online monitoring with the pressure before the final group of the steam turbine under the condition of the same main steam flow so as to judge the fouling condition of the flow passage area of the final group of the steam turbine and realize the online diagnosis of the fouling degree of the whole flow passage of the steam turbine. The invention has the advantage of scientific method, and can realize automatic online monitoring and accurate judgment, and the like.

The invention discloses a system and a method for controlling a ground-guidance type pedestrian street-crossing auxiliary signal in the field of traffic signals. A ground-guidance signal lamp group consists of two groups of side-group signal lamps, two groups of middle-group signal lamps and a group of center-group signal lamps, wherein the group of center-group signal lamps is arranged in the center of a pedestrian crosswalk; the two groups of side-group signal lamps are respectively arranged on the pedestrian crosswalk which corresponds to the center of an outer motorway; the two groups of middle-group signal lamps are respectively arranged on the pedestrian crosswalk which corresponds to the center of an inner motorway; each group of ground-guidance signal lamps is formed by connectinga row of small signal lamps in series; side faces A, B and C of each small signal lamp are luminous surfaces; the side faces A and B respectively face two ends of the pedestrian crosswalk; the side face C faces the entering direction of motor vehicles; and when pedestrians are endowed with a right of way and when the time of the right of way of the pedestrians is reduced, an intuitive passing signal prompt is provided for the pedestrians by controlling traffic lights on the side faces A, B and C, and the pedestrians can choose appropriate time and adopt a safe and effective behavior to cross the street.

The invention discloses a group distribution method of standby batteries, comprising the following steps: (1) determining a numerical value as the weight design value of monolithic polar plates, weighing the monolithic polar plates, and leaving the polar plates the weight of which is within the range of plus or minus 2.5% of the weight design value; (2) grouping the polar plates obtained in step (1), and sequencing the polar plates based on a big group, a middle group and a small group, wherein, the minimum value in each group differs by the same fixed value successively; (3) using three groups of the polar plates to carry out polar-group group distribution, wherein, auto-group distribution is carried out on the polar plates of the middle group, the polar plates of the big group and the small group perform mutual group distribution according to the ratio of 1:1, and a negative polar plate is selected from the middle group; and (4) after group distribution, ensuring the weight deviation of each polar group does not exceed 1%. After the batteries are prepared by the group distribution method of the invention, the proportion of a positive active material to a negative active material and the consistency of acid absorption saturation of a partition plate are high, the consistency of float charge voltage of the standby batteries can be improved by more than one time, and the float charge service life can be improved to more than 10 years.

The invention discloses a master-batch drying device. The master-batch drying device comprises a drying barrel, wherein a stirring paddle is vertically arranged in the drying barrel; a barrel cover is arranged at the upper part of the drying barrel; a motor is fixedly arranged on the barrel cover of the drying barrel, and is connected with the stirring paddle by a speed reducer; the lower part of the drying barrel is connected with a conical filter mesh; the side wall of the lower part of the conical filter mesh is connected with an air channel which is internally provided with a heating pipe; an exhaust port is formed in the barrel cover; a discharging port of the bottom part of the conical filter mesh is provided with a sieve mesh; the stirring paddle extends to the interior of the conical filter mesh; and multiple layers of stirring blades are distributed on the stirring paddle. The master-batch drying device has the characteristics that the stirring paddle is arranged in the drying barrel and the conical filter mesh, the stirring blades on the stirring paddle are divided into an upper group, a middle group and a lower group, and the two-layer stirring blades in the conical filter mesh can enhance vertical and lateral flowing of the master batches in the filter mesh so as to guarantee the drying quality of the master batches.

The invention reveals a method for quickly selecting a pre-emphasis parameter of a high-speed serdes, and the method comprises the steps: enabling testing equipment to be in butt joint with the high-speed serdes through an optical module; adjusting the parameter setting of the optical module and a receiving end of the high-speed serdes; enabling a high-speed serdes with a to-be-adjusted pre-emphasis parameter to be in butt joint with a high-speed serdes with an adjusted pre-emphasis parameter through an optical module; determining a value range of the pre-emphasis parameter; sequentially selecting a group of parameters in the value range, and configuring the group of parameters to the to-be-adjusted high-speed serdes; enabling the to-be-adjusted high-speed serdes to transmit a random binary sequence message; carrying out the pseudo random binary sequence message inspection at the receiving end of the adjusted high-speed serdes; recording the group of pre-emphasis parameters if the inspection is passed, or else, carrying out no recording till all pre-emphasis parameters are scanned and all pre-emphasis parameters passing the pseudo random binary sequence message inspection are recorded; and selecting the middle group of optimal pre-emphasis parameters from all pre-emphasis parameters. The method effectively eliminates attenuation and crosstalk generated by the transmission of a high-speed electric signal in a channel.

The invention relates to an active temperature / pressure-compensating real-time transmission type aerophotographic camera lens. The lens is characterized in that: the focal length is 650mm, the F number is 8, and the field of view is 5.5 degrees. The lens comprises a front group, a middle group, a diaphragm (8), a focusing lens (9) and a rear group, and all the lenses are sequentially arranged on the same optical axis. By adjusting the focusing lens (9), the change of the focal plane caused by temperature and pressure can be compensated, consequently, wide-temperature, low-pressure operation can be realized, and imaging quality can be ensured; the temperature regulation range is between negative 60 DEG C and 60 DEG C; and the pressure regulation range is 0 to 1 atmosphere standard. The invention does not need an additional constant-temperature or temperature controller and an additional constant-pressure or pressure controller, consequently, the weight and size of a camera are reduced, and meanwhile, the energy requirement of the camera system on a platform is reduced.

A zoom lens consists essentially of, in order from the object side: a positive first lens group that is fixed during magnification change; a moving lens group consisting of at least two lens groups that are moved along the optical axis direction to change an air space therebetween during magnification change; a stop; and a positive end lens group that is fixed during magnification change. The first lens group consists of, in order from the object side, a negative first lens-group front group, a positive first lens-group middle group, and a positive first lens-group rear group. During focusing, only the first lens-group middle group is moved along the optical axis direction. The first lens-group middle group includes at least one aspheric lens that satisfies predetermined condition expressions.

The invention discloses a vertical read-lead mobile oxidation furnace. The upper end of a furnace body is provided with an upper oxidation chamber, while the middle part is provided with a middle oxidation chamber, and the lower end is provided with a lower oxidation chamber; the bottom of the upper oxidation chamber is provided with an upper group of heat collecting tubes, the bottom of the middle oxidation chamber is provided with a middle group of heat collecting tubes, the bottom end of the lower oxidation chamber is provided with a lower group of heat collecting tubes, and heat dissipation holes are formed on the circumferences of branches of the upper, middle and lower groups of heat collecting tubes; the left side of the furnace body is provided with a combustion chamber, the left end of the combustion chamber is provided with an oil nozzle and an electronic igniter, and the right side of the combustion chamber is provided with a main heat supply pipe; the right side of the main heat supply pipe is provided with upper, middle and lower shunt pipes in turn, and the three shunt pipes are connected and arranged at inlets of the three groups of heat collecting tubes respectively; the upper end of the upper oxidation chamber is provided with a waste heat collecting chamber, and the upper end of the waste heat collecting chamber is provided with a feed hopper; and the lower side of the lower oxidation chamber is provided with a baiting hopper, the bottom end of the baiting hopper is provided with a cooling barrel, the lower end of the cooling barrel is provided with a blanking box, a distribution sieve is arranged in the blanking box, and the lower end of the distribution sieve is provided with a discharge hopper and a distribution hopper.

The invention discloses a pile leg segmented construction method. A pile leg body is of an octagon plate frame structure, and a pile leg is divided into seven subsections from bottom to top. The method comprises the steps of steel plate blanking, jig frame manufacturing, support plate using, subsection assembling, whole section forming by folding middle group three-dimensional subsections in advance and assembling according to given assembly sequence. Assembly is conducted by combining traditional large equipment, strict management and control can be achieved in the data mode in the pile leg construction process, setting is conducted on related technological steps through reasonable technological parameters, and according to actual production verification, the pile leg segmented construction method can effectively improve the production efficiency.

The invention discloses a fixed-point lifting type bridge erection machine and a bridge erection method. The fixed-point lifting type bridge erection machine is characterized by being mainly composed of girders, a front supporting leg, a middle supporting leg, a rear supporting leg, hanging beam overhead travelling cranes, slide arms, a beam pushing channel and a hydraulic and electrical control system, wherein the girders are of a double-span type double-girder structure, the girders are connected through a front group of middle cross connectors, a middle group of middle cross connectors and a rear group of middle cross connectors, and the tops of the girders are provided with overhead travelling crane rails; the hanging beam overhead travelling cranes are installed on the overhead travelling crane rails, and the front supporting leg is fixedly installed below the front ends of the girders; the rear supporting legs are fixedly installed below the tail portions of the girders; the middle supporting leg is installed below the middle portions of the girders of the bridge erection machine; each side arm is composed of an outrigger, a sliding beam, a lateral moving system and a suspension arm, and the side beams are installed on the two outer sides of the girders and are symmetrical about the axis of the bridge erection machine; the upper end of each bottom cross support is connected with a corresponding inclined support, and the lower end of each bottom cross support is fixedly connected with the top surface of a beam pushing bottom plate; the beam pushing channel is composed of two beam pushing rails, a supporting bottom plate, a docking mechanism and an installation truss. The bridge erection method is characterized in that the fixed-point lifting type bridge erection machine is adopted.

A zoom lens for projection consists of a negative first lens group, which is fixed during magnification change, a middle group, which includes plural lens groups that move during magnification change, and a positive last lens group, which is fixed during magnification change, in this order from a magnification side. A reduction side is non-telecentric. Both of a lens group closest to the magnification side and a lens group closest to the reduction side in the middle group have positive refractive power, and move from the reduction side toward the magnification side during magnification change from a wide-angle end to a telephoto end. The last lens group includes at least two positive lenses and at least two negative lenses. A positive lens is arranged closest to the reduction side in the last lens group. A predetermined conditional expression about a focal length of the last lens group is satisfied.

The invention relates to a sodium silicate waste sand rotary vibration grinding wet-type regenerator, which is used for regenerating waste sand, and comprises steel helical rubber composite springs (11), a machine frame (10), an outer barrel body (1), an inner barrel body (8), barrel body lateral plates (4), ceramic grinding balls (12) and vibration motors (7), wherein a plurality of steel helical rubber composite springs (11) are adopted; the outer edge of the outer barrel body (1) is placed on a middle group of steel helical rubber composite springs (11); a grid sieve plate (5) is arranged in the middle of the top part of the inner barrel body (8); the ceramic grinding balls (12) are arranged in a cavity formed between the outer barrel body (1) and the inner barrel body (8); the machine frame (10) is horizontally arranged on the left and right two groups of steel helical rubber composite springs (11) and is fixedly connected with the two barrel body lateral plates (4); the two vibration motors (7) are fixed on the left and right sides of the machine frame (10) on the left and right sides of the outer barrel body (1) respectively; and the center lines of the two vibration motors (7) are coincide with the center line of the inner barrel body (8) and the outer barrel body (1). The sand washing water consumption of each ton of regenerated sand is reduced to 1 to 1.5 tons from 2 to 3 tons.

Disclosed is a porous control method for blasting softening of a hard top plate and a coal seam. The method comprises the following steps that a drilling arrangement scheme is determined according to the hard top plate and the coal seam at an underhole place to be blasted, that is to say, three groups of blast-holes are formed along the overall length of a working surface in an up-down parallel mode at equal intervals, wherein the uppermost group of blast-holes and the lowermost group of blast-holes are both rows of control hole groups, the middle group of blast-holes is a row of blasting hole groups, and each control hole group comprises several control holes which are formed along the overall length of the working surface in a parallel mode at equal intervals. Thus, according to the method, the overall blasting softening effects on the hard top plate and a coal body are good; by conducting blasting softening treatment on the hard coal rock mass covering at the front of the working surface in advance, the limit caving step of the top plate at the rear portion of the working surface is reduced, and puking, nicking and other accidents are prevented from occurring on a mined surface; the method has the advantages of being high in drilling hole utilization rate, low in engineering workload, high in blasting safety factor and the like and can be applied to softening and caving control of various hard top plates and coal bodies under coal mines.

By suitably correcting a secondary spectrum, a clear, bright optical image is obtained. Provided is a rigid-scope optical system including: an objective optical system; and at least one relay optical systems that are formed of positive front groups, middle groups, and back groups in this order from an entrance side and that reimage an optical image imaged at imaging planes at the entrance side onto imaging planes at an exit side, wherein axial chromatic aberration between two wavelengths is corrected by an optical system other than the diffractive optical element, and axial chromatic aberration between the two wavelengths and another wavelength is corrected by the diffractive optical element.

The invention relates to the technical field of integrated optics, and provides an array raster waveguide type wavelength division multiplexer which is based on the planar optical waveguide technology. The semiconductor silicon-based silicon dioxide plane fabrication process is adopted. A front slab waveguide having the free focusing function, a rear slab waveguide having the free focusing function and a middle group of planar array waveguide form an integrated light path. The two-way reversible type single-path / multichannel intensive multichannel input and output ports and the wavelength division multiplexing / demultiplexing function can be realized. The photoelectric integration integrated module metal shell packaging form is adopted. A built-in automatic constant temperature control device is adopted. The temperature stability of the planar integrated array waveguide raster can be effectively improved. The optical device not only has advantages of compact structure, high integration degree, small size, light weight and stable and reliable performance, but also has advantages of mature and stable fabrication process, large batch production, high production efficiency and low cost, and is suitable for being used in a wavelength division multiplexing system of a backbone network, a metropolitan area network and an access network of optical communication.

The invention discloses a double-sided sueding machine, which comprises a rack, rigid sueding rolls and flexible sueding brush rolls. The double-sided sueding machine comprises front, middle and rear groups of sueding rolls. A swinging single-sided and double-sided sueding route replacement device is arranged between the front and middle groups of sueding rolls. The swinging single-sided and double-sided sueding route replacement device comprises swing rolls, a spreading roll and a driving cylinder. A weighing sueding area tension detector and a rubber roller-type guiding cloth roll are arranged between the middle and rear groups of sueding rolls. The front, middle and rear groups of sueding rolls are respectively cooperatively provided with a cloth press roll device II, a cloth press roll device I and single-sided and double-sided bristle-regulating press rolls. A cloth supporting device with a dust-collection function is also arranged at the middle sueding rolls. According to the invention, the whole sueding technological process is shortened, the most common strip problem during sueding is eliminated and the amount of fabric curling is reduced, and fabric single-sided and double-sided sueding and brushing quality is enhanced.

A system and method for accounting for clock slew during autobauding. Upon identifying an AT command and the baud rate of the incoming data stream, the present invention accounts for clock slew in one of two ways, depending upon the baud rate of the incoming data stream. If the baud rate of the incoming data stream is 9600 or greater, the present invention accounts for slew by utilizing a feature associated with ASCII characters and RS-232 protocol, that is the stop bit being nicely framed on both sides by spaces. This feature is used to determine whether negative or positive clock slew exists. If negative clock slew exists and it is determined that negative clock slew falls within a certain threshold, a sample is skipped. If positive clock slew exists and falls within a certain threshold, positive clock slew is converted to negative clock slew by taking an extra sample. Clock slew is accounted for by reconstructing bits from an old sample and a new sample, based on the calculated slew value, to obtain an actual sample that eliminates deleterious effects of clock slew. When the baud rate of the incoming data stream is less than 9600, the present invention accounts for clock slew by taking a middle group of 8 samples from the start bit when multiple groups of 8 samples per bit exist. This is accomplished by searching for the next start bit. Once the next start bit is found, determining which group of 8 samples is a middle sample.

The invention discloses a battery pack assembly method; the battery pack is a series battery pack, and the assembly method comprises the following steps: S1, electrical cores are mounted on a detection capacity-grading device, and the capacity of each electric core is recorded; S2, cyclic charge and discharge is performed according to a charge and discharge rate required by uses, and charge and discharge curves are recorded; S3, a change rate dQ / dV curve of the electric quantity of the discharge curve of each electric core along with the voltage is calculated, the dQ / dV curve has two peak values, voltage values corresponding to the peak values are found out according to the dQ / dV curve, then corresponding electric core electric quantity values are found out according to the voltage valuesin the discharge curve, and the difference value of the two electric quantity values is Dn; S4, each electric core is charged to 50% of the electric quantity, and the self discharge rate of each electric core is calculated; and S5, the Dn can be classified into a plurality of groups; each big group is divided into multiple middle groups according to the capacity of the electrical cores, and each middle group is divided into multiple small groups according to the self discharge rate; and during assembly, the multiple electric cores in the same small group are assembled.

A microscope objective includes at least five lens components, which are divided into three groups that are, in order from an object side: a front group having a positive refracting power as a whole and having a meniscus lens component with an object-side surface thereof being concave toward the object side; a middle group having a positive refracting power as a whole and having a plurality of cemented lens components; and a rear group having a pair of concave air-contact surfaces arranged adjacent and opposite to one another,wherein the following conditions are satisfied:3≦D0 / f≦61≦H2 / H1≦1.5where D0 is an axial distance from an object surface to a rearmost surface of the microscope objective, f is a focal length of the microscope objective, H2 is a height of a marginal ray as emergent from the rearmost surface of the microscope objective, and H1 is a maximum height of the marginal ray as passing through the front group and the middle group.

A surface mount semiconductor device has a semiconductor die encapsulated in a molding compound. Electrical contact elements of an intermediate set are disposed on the molding compound. A set of coated wires electrically connect bonding pads of the semiconductor die and the electrical contact elements of the intermediate set. A layer of insulating material covers the coated wires, the die and the electrical contact elements of the intermediate set. Electrically conductive elements are exposed at an external surface of the layer of insulating material and contact respective electrical contact elements of the intermediate set through the layer of insulating material.

The invention relates to a vehicle LED tail light device and a vehicle which comprises the vehicle LED tail light device, and the vehicle LED tail light device comprises an LED light group (10) and a tail light controller (20); the LED light group (10), which comprises an uniline light that is formed by a plurality of LEDs, is divided into a left group, a middle group and a right group which are arranged at the left part, the middle part and the right part of the vehicle tail; the tail light controller (20) comprises a signal receiving unit (21), a mode selecting unit (22) and an indication controlling unit (23); the tail light controller (20) is allocated to be a corresponding mode which can control the operation of the LED light group (10) according to the received vehicle state signals. The tail light displaying device provided by the invention has the advantages of good warning, direct displaying and high security.

The invention discloses a dual-phase stainless steel segmented construction method for a chemical ship. The dual-phase stainless steel segmented construction method for the chemical ship comprises thefollowing steps that a carbon steel middle group and a stainless steel splicing plate are separately constructed, wherein the stainless steel splicing plate comprises a framework surface and a liquidcargo tank surface; the carbon steel middle group and the stainless steel splicing plate are combined; the stainless steel splicing plate is welded on the carbon steel middle group; an outfitting piece is arranged on the liquid cargo tank surface, and surface treatment is performed; and when the stainless steel splicing plate is welded on the carbon steel middle group, the framework surface is firstly welded, and then the liquid cargo tank surface is welded. The dual-phase stainless steel segmented construction method for the chemical ship has the beneficial effects that the number of stainless steel special jig frames and the arrangement of stainless steel segmentation special jig positions are reduced, the stainless steel segmented construction efficiency is improved, the welding efficiency and quality of stainless steel welding workers are further improved, the stainless steel welding deformation can be effectively controlled by fully utilizing the stainless steel deformation mechanism, so that the stainless steel segmented construction quality is improved.

The invention relates to an on-pile travelling device. The on-pile travelling device comprises a rack (1), guide rails (2), a front group of supporting legs (3), a middle group of supporting legs (4), a back group of supporting legs (5), a front horizontal cylinder (6), a back horizontal cylinder (7) and a rack connecting plate (8), wherein the middle group of supporting legs (4) are fixedly connected with the rack (1) through the rack connecting plate (8); the front group of supporting legs (3) are connected with the middle group of supporting legs (4) through the front horizontal cylinder (6); the middle group of supporting legs (4) are connected with the back group of supporting legs (5) through the back horizontal cylinder (7); and the guide rails (2) comprise a left guide rail and a right guide rail and are respectively fixed to the rack (1). The on-pile traveling device can travel on an implanted pile body, and the moving efficiency and the piling efficiency of a piling machine are greatly improved.

A zoom lens includes sequentially from an object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, an aperture stop, and a third lens group having a positive refractive power. The first lens group includes a negative lens and a positive lens. The second lens group includes sequentially from the object side, a negative lens, a negative lens, and a positive lens. The third lens group includes sequentially from the object side a front group having a positive refractive power, a middle group having a negative refractive power, and a rear group having a positive refractive power. The front group is formed by a positive aspheric lens. The middle group is includes a cemented lens formed by a positive lens and a negative lens.

The application discloses a projection device and a lens, belonging to the technical field of projection. The projection device includes a light source, an optical-mechanical system, and a lens; the optical-mechanical system is connected to the light source; the lens includes a main lens barrel, a middle group lens barrel, a gear ring, a driving mechanism and a controller; the gear ring is limitedin an inner cavity of a second end of the main lens barrel and can rotate relative to the circumferential direction of the main lens barrel; the inner wall of the second end of the main lens barrel is provided with a guide groove extending in the axial direction; the outer wall of the middle group lens barrel is provided with a boss; one end of the middle group lens barrel extends into the innercavity of the second end of the main lens barrel and is connected to the gear ring in a threaded manner; the boss is clamped in the guide groove; the driving mechanism is fixed on the outer wall of the main lens barrel; the controller is electrically connected to the driving mechanism; and the driving mechanism can drive the gear ring to rotate based on the controller. According to the application, the driving mechanism is controlled by the controller, so as to drive the gear ring to rotate, and finally realize the adjustment of the middle group lens barrel, so that the precise adjustment of the focal length is realized, which has the effect of improving the imaging quality of the projection device.