141 results about "Beam length" patented technology

Techniques for using imaging information computed from examining a scanner signal are described. When one or more objects passes within a field of view of a scanner, scan patterns emerging from one or more scanner windows and reflected from the objects back into the scanner windows produce one or more scanner signals. The scanner signals are processed to obtain beam position and beam length information to improve the accuracy of bar code decoding and to compute imaging information for objects within the field of view of the scanner. The imaging information for the objects is compared with bar code information for the objects. The expected number, size and shapes of objects indicated by the bar code information is compared with the actual number, size and shapes of objects in order to determine if valid scans occurred or if missed, double or otherwise erroneous scans occurred.

A line width compression device containing beam shaping and wavelength rotation tuning is composed of a beam shaper, a prism beam expander and a diffraction grating. The long axis of a rectangle beam is split into sub beams in a plurality of directions by placing a prism on a light path, the deflecting sub beams are overlaid with the short axis of an original beam by a high reflective mirror, thus realizing variation of length-width ratio of the beam and further reducing beam length requiring beam expansion and effectively reducing the grating length; the central wavelength tuning mechanism of a laser is realized by rotating the rotating floor of a fixed prism, a stepping motor rotating floor and a PZT nano rotating floor respectively realize rough tuning and precise tuning on two beam expansion prisms, and the incident angle of the beam and the grating is adjusted to realize rough tuning and precise tuning of the central wavelength of the laser. The invention can realize narrow line width laser output, the beam shaping can effectively reduce the size of the diffraction grating, the tuning of the central wavelength causes the structure to be compact and be easy for tuning, and the invention is applicable to multiple lasers, especially an excimer laser.

The invention relates to an auxiliary device for binding reinforcements of a reinforced concrete beam and application thereof. The device comprises two telescopic brackets and a cross bar, wherein the two telescopic brackets are arranged in parallel; and the cross bar is overlapped on the two brackets. The application of the auxiliary device is as follows: according to the condition of the beam depth, the heights of the brackets are regulated, so that the brackets are slightly higher than the beam; the auxiliary devices are arranged in pairs along the beam length direction at intervals of 3 to 5m and the auxiliary devices are placed on plate formworks at both sides of a beam formwork; beam upper main reinforcements are placed on the cross bars, beam stirrups are sleeved, beam lower main reinforcements are inserted and the reinforcements are bound to form a beam reinforcement skeleton; the beam reinforcement skeleton is pulled up, the auxiliary devices at the end where the reinforcement binding is completed are removed, the beam reinforcement skeleton is slowly placed into the beam formwork; and the pair of auxiliary devices at the upper part are moved to a next section to bind reinforcements of the section of beam. Compared with the prior art, the device disclosed by the invention is stably stressed, is convenient to use, has an adjustable height, can be reused, can be suitable for binding reinforcements with different beam depths, can be industrially produced in batches and has high social benefits and economic benefits.

A bifurcated electrical contact includes first and second contact beams of different beam lengths and contact zones curved transverse to the beam lengths.

The invention discloses a piezoelectric oscillator structure for vibration energy recycling. The piezoelectric oscillator structure comprises a base structure and a piezoelectric electromechanical coupling electricity generating unit fixed on the base structure. The piezoelectric electromechanical coupling electricity generating unit comprises at least a pair of piezoelectric electromechanical coupling generators. The piezoelectric electromechanical coupling generator comprises beams of variable cross-sections, permanent magnet mass blocks and piezoelectric elements integrated on the surfaces of the beams of variable cross-sections. The permanent magnet mass blocks are fixed at the free ends of the beams of variable cross-beams. The root of the beam of variable cross-section is fixed on the base structure. The thickness of the free end of the beam of variable cross-section is less than the thickness of the other end. Opposite sides of each permanent magnet mass block have the same polarity and have a gap. The piezoelectric oscillator structure is added with an amplitude limiting structure used for recycling impact vibration energy, thereby protecting the internal cantilever beam structure, and improving the vibration energy recycling efficiency; the amplitude limiting structure can recycle upward vibration energy of various directions in a two dimensional plane vertical to a neutral line; each beam of variable cross-section adopts a variable cross-section design, so that the piezoelectric element has equal strain in beam length direction while the shape of the piezoelectric element is not changed, and the electromechanical coupling coefficient of the structure is improved.

Provided is a flashlight that includes a plurality of light sources for providing a beam of light. Preferably, the light sources have different levels of power consumption, different brightnesses and/or different beam lengths. More preferably, the plurality of light sources includes at least one light-emitting diode (LED) and at least one incandescent lamp. A housing directs the beam of light and an integrated circuit controls illumination of the plurality of light sources, with a switch providing an input signal to the integrated circuit. In the preferred embodiment of the invention, the switch is a pushbutton switch and the integrated circuit is a multi-state electronic device that changes state when the signal is input from the switch, with different states of the integrated circuit causing different combinations of the light sources to become illuminated.

The invention provides an adjustable frame node anti-vibration test loading device. A height difference converter block is arranged on a reaction wall, and is adjustable in height; one end of a loaderis connected with the height difference converter block, and the other end is connected to the side portion of an upper column end of a test piece; a column bottom hinge support is arranged on a rigid ground beam and is used for mounting a lower column end of the test piece; a jack is mounted on the upper column end of the test piece; the upper portion of the jack is provided with a column top rigid reaction plate; the column top rigid reaction plate and the column bottom hinge support are fixedly connected through a fixation connector; and a beam length adjusting square steel pipe sleeves the rigid ground beam to form a beam length adjusting mechanism. The beam length adjusting square steel pipe is mounted on the ground, and is adjustable in axial position. Each beam end adjustable support rod is adjustable in length, wherein one end of the each beam end adjustable support rod is connected with the beam length adjusting mechanism, and the other end there of is connected with the endportion of the test piece beam. The adjustable frame node anti-vibration test loading device is an internal force and self-balance loading system, is adjustable in size and can be used repeatedly.

The invention relates to a longitudinal shear reinforcement and precast slab separated laminated slab composite beam, and belongs to the technical field of building structures. The longitudinal shearreinforcement and precast slab separated laminated slab composite beam comprises a concrete precast slab with a platform formed at the end, an additional reinforcement mesh unit and an upper concretepost-cast layer; no reinforcement stretches out of the slab end of the concrete precast slab with the platform formed at the end, meanwhile a step-shaped platform with the certain width is reserved atthe top of the precast slab, and the reinforcement mesh unit which is constituted by longitudinal and transverse reinforcements which are bundled is placed in the platform; and the transverse reinforcements play a longitudinal shear resistance role in the composite beam, the reinforcements in the beam length direction are parallelly placed in the step-shaped platform, and the positioning fixing effect is achieved. In the composite beam, traditional precast slab horizontal reinforcing bars are omitted, and through the modes that the step-shaped platform is formed at the slab end, and the reinforcement mesh unit is embedded, the longitudinal shear resistance problem of the composite beam and the longitudinal shear resistance reinforcement positioning problem are solved; and the longitudinalshear reinforcement and precast slab separated laminated slab composite beam is definite in force transmitting, convenient to construct, and suitable for laminated slab composite beam systems in thefields such as building engineering and bridge engineering.

This invention provides an electron beam length measuring technology including a standard component for length measurement that has a finer standard dimension, and its producing method. The standard component for length measurement has a semiconductor member on which is arranged a pattern consisting of an array of first diffraction gratings whose pitch dimension is specified as an absolute dimension by an optical measurement method, wherein the pattern has a structure in which an array of second diffraction gratings different from the first diffraction gratings is arranged in a portion within the array of the first diffraction gratings in a predetermined cycle. Each one of the first diffraction gratings and the second diffraction gratings has a predetermined length and a predetermined width, respectively. The first diffraction gratings and the second diffraction gratings are arranged cyclically at respective predetermined intervals, and marks for specifying positions of the above-mentioned patterns are arranged in peripheral portions of the above-mentioned patterns. Moreover, the above-mentioned pattern contains an array pattern whose minimum pitch dimension is equal to or less than 100 nm. The electron beam batch exposure method is used as a pattern producing method.

The invention discloses a plate bending angle detection device and method. A plate is provided with a first part and a second part which form a bending angle. The device comprises a scanner and a processor, wherein the scanner is used for emitting beams to the plate and generating a detection signal comprising beam lengths and emitting angles corresponding to a plurality of points on the first part of the plate and beam lengths and emitting angles corresponding to a plurality of points on the second part of the plate; the processor is used for determining a linear equation of the first part and a linear equation of the second part according to the detection signal and calculating the bending angle of the plate according to the linear equation of the first part and the linear equation of the second part. Therefore, the bending angle can be detected in real time in the plate processing process. The plate bending angle detection device and method improve production efficiency and measurement efficiency, are high in automation degree and free of manual intervention, and reduce labor force.

The invention discloses a linear PC track beam prefabrication construction method. The linear PC track beam prefabrication construction method comprises the operations of steel bar cage binding, bottom mold splicing, support seat installing, end mold installing, side mold adjusting, concrete pouring and demolding. According to the linear PC track beam prefabrication construction method, a moving type template system and corresponding fabrication working procedures are adopted, the bottom mold length is adjustable to deal with different beam types, beam lengths and beam heights, parallel operations are performed between the different working procedures, and the track beam prefabrication efficiency and precision are greatly improved.

The invention relates to the field of construction and provides an integral lifting type formwork device for an elevator shaft. The device comprises a core tube in a rectangular structure, side boards with wall penetration wire holes are arranged on four lateral sides of the core tube respectively, a vertical column with a rectangular section is arranged at the joint of each two adjacent lateral sides, the lateral side of each vertical column is flush with the surface of the corresponding side board, a plurality of contraction devices enabling the side boards to move along the inner sides of the vertical columns are arranged inside the vertical columns, the lower portion of each vertical column is in movable connection with a base of the core tube, a plurality of claw seats in matched connection with latch boxes preset in walls are arranged below the base, and the claw seats in a horizontal state support the base and are in downwardly rotatable connection with the base. Arbitrary beam length adjustment in a certain range is realized, and convenience in adjustment and reusability are achieved; when the integral lifting type formwork device is used for establishing of a formwork platform, the formwork platform is enabled to be adjustable in size to adapt to construction of cylindrical cast-in-situ shear wall formworks different in section size; after construction is finished, the device can be lifted upwards to be directly used for construction of the elevator shaft at a lower storey, technical performances are promoted, construction efficiency is greatly improved, and reusability is achieved.

The invention discloses a total-length traveling rotary pile-passing beam bottom inspection vehicle system. The system comprises inspection vehicle rails, a traveling mechanism, a traveling drive system and a vehicle frame, wherein the vehicle frame comprises a truss and folding arms arranged at the two ends of the truss; an amplitude variation mechanism for controlling the rising amplitude of the folding arms is arranged between the truss and the folding arms; a rotation device which makes the vehicle frame rotate horizontally is arranged on the truss; a detection element for detecting a rotation position is arranged on the inspection vehicle rail; and a safe protection device for connecting the truss and the folding arms is arranged on the vehicle frame. The system has the advantages of high automation degree, high economic indexes, high safety, convenience in operation, convenience and rapidness in inspection on beam bottom and the like, and can realize the beam bottom inspection on a multi-span continuous bridge structure in a total beam length range and in a barrier-free mode.

A tubular beam support testing tool is composed of a base (1), a positioning testing base (2), fixing support bases (3), a hole testing base (4), a cam testing base (5), a latching fixing base (6) and a tubular beam support (7). Firstly the tubular beam support (7) is placed on the testing tool at a corresponding position, and then the right end of the tubular beam support (7) is fixed on the latching fixing base (6). Then a clamp of the fixing support base (3) on the left end is pressed down, then the fixing support base (3) on the right end is pressed down, a turnover plate structure (4-1) is turned over and presses a boss (4-3) into an installation hole (7-1) of the tubular beam support (7), and finally a plug gauge is used to test if the gap between the right end of the tubular beam support (7) and a positioning testing block (2-1) is within a predetermined range. The testing tool is simple in structure and convenient for use, can quickly measure and assess the positioning installation hole size of the tubular beam support, tubular beam length and other sizes, ensures consistency of product manufacturing, and improves product assembly efficiency.

The invention discloses a steel-wood integration I-beam, which is composed of wooden beam, wherein the force type steel is connected to two lateral surfaces in the wooden beam length direction; two ends of wooden beam connects to roll end; the I-beam uses extrusion steel plate teeth and fastener to make the section steel and timber compact for one body; the steel-wood integration I-beam has stronger hardness, good versatility, which is fit for supporting of building form plate such as steel-wood mold plates, steel form, bamboo plywood and so on; the cost of the steel-wood integration I-beam is 50% aluminum alloy beam, 85% steel beam and 95% wood girder; The I-beam reduces the cost of transport and storage.

The invention discloses a multi-rotor wind power generation system with equal beam length, which comprises a lower pylon 1, a rotary bearing 3, windmills, an upper pylon 2, a rope and/or a rod 8, beams 6 and a tail vane 7, wherein the rotary bearing is arranged between the upper pylon and the lower pylon; two sides of the upper pylon are respectively connected with one ends of the beams; the outer end of the uppermost beam is connected with the top end of the upper pylon through the rope and/or the rod; the outer ends of adjacent beams are connected through the rope and/or the rod; the lengths of the beams at two sides of the upper pylon are equal; the windmills are fixedly connected with the top of the upper pylon or/and the beams; the number of the windmills on the beams at one side is greater than that of the windmills on the beams at the other side; and the tail vane is connected with the upper pylon, the beams or/and an engine room through a pin roll. The multi-rotor wind power generation system has the advantages of long service life of the vane, small occupied area, low cost for installation and maintenance, favorable reliability, wide application range, low bearing stress, automatic wind resistance and yawing and small stress of the beams; and the rotary bearing or a rotary driving device in the engine room is omitted.

The invention provides a prestressed partially-encased steel T-shaped composite beam. Based on a prestressed prefabricated assembly technology, the prestressed partially-encased steel T-shaped composite beam is mainly composed of a prestressed prefabricated rectangular composite beam and a cast-in-place concrete flange plate. The prestressed prefabricated rectangular composite beam comprises honeycomb profile steel, tie bars, closed stirrups, first in-beam longitudinal bars, second in-beam longitudinal bars, a plurality of prestressed steel strands, prefabricated UHPC (Ultra High Performance Concrete) and studs, wherein the tie bars are arranged in holes of the honeycomb profile steel and are perpendicular to a web of the profile steel; the closed stirrups are arranged between flanges of the honeycomb profile steel; the first in-beam longitudinal bars are arranged at the inner bottoms of the closed stirrups and are parallel to the beam length direction; the second in-beam longitudinal bars are arranged at the inner tops of the closed stirrups and are parallel to the beam length direction; the prestressed steel strands are arranged on the upper portions of the lower flanges of the honeycomb profile steel and are parallel to the beam length direction; the prefabricated UHPC is arranged between the flanges of the honeycomb profile steel in a filling mode; and the studs are arranged at the tops of the upper flanges of the honeycomb profile steel. The cast-in-place concrete flange plate comprises double-layer bidirectional steel bars and cast-in-place concrete, wherein the double-layer bidirectional steel bars are arranged in a cast-in-place flange plate body, and the cast-in-place concrete is arranged at the top of the prestressed prefabricated rectangular composite beam in a filling mode. The prestressed partially-encased steel T-shaped composite beam is excellent in stress performance, the crack resistance and flexural rigidity of the beam can be obviously improved, on-site construction is convenient and fast, and the construction period is shortened.

The invention discloses a segmented self-traveling type cast-in-place beam hydraulic inner mould and a mould erecting and demoulding method thereof. A mould moving device (2) is composed of a mould moving trolley (22), a guide column device (21), lateral oil cylinders (231), an ejecting oil cylinder (232), a hydraulic system (23) and an electrical system (24). The mould moving device (2) is movably connected with segmented formworks (1) through the guide column device (21). The mould moving trolley (22) is arranged on rails (3), and a formwork set is divided into the segmented formworks (1) in the beam length direction. Each segmented formwork (1) is composed of a top plate (11), upper movable formworks (12) and lower movable formworks (13), wherein the left end and the right end of the top plate (11) are symmetrically provided with the upper movable formworks (12) in a hinged mode, and the other ends of the upper movable formworks (12) are hinged to one ends of the lower movable formworks (13). The lateral oil cylinders (231) are connected between the upper movable formworks (12) and the mould moving device (2). Chain hoists (14) can be connected between the upper movable formworks (12) and the lower movable formworks (13). The ejecting oil cylinder (232) is installed between the guide column device (21) and the mould moving trolley (22). The mould is safe, efficient, good in overall stability and good in economic efficiency.