35 results about "Long spacing" patented technology

The invention discloses a tubular lens of an image recognition system. The tubular lens is used for cooperating with an object lens; the focal distance of the tubular lens is f; the tubular lens comprises a first lens group, a second lens group and a third lens group; a diaphragm can be flexibly arranged; the focal distance of the first lens group f1 is greater than 0.7f, but smaller than 1.2f, and the effective clear aperture of the first lens group is greater than 0.1f; the focal distance of the second lens group f2 is greater than 0, but smaller than 0.2f; the focal distance of the third lens group f3 is greater than -5f, but smaller than -2f; an interval between the first lens group and the second lens group on an optical axis is smaller than 0.05f; an interval between the second lens group and the third lens group on the optical axis is greater than 0.25f. According to the tubular lens, the first lens group adopts a lens made of a material with large clear aperture and high refractivity as a light beam constraining lens, so that a large-visual field light beam under a large interval can be effectively constrained; furthermore, the second lens group and the third lens group can compensate and optimize light rays, so that aberration is corrected and an image space visual field is controlled, and thus the requirement of high-quality imaging, in which the interval can be increased and the lens can be varied, is ultimately met.

A temperature control grate cast by embedding a stainless steel capillary and a control method thereof overcome the hidden safety trouble that a welding leak point exists in the existing tubular grate bar and radiating water tank adopting a welding method, as well as the technical problems of long spacing between the grate pipes and great water flow resistance in the pipes caused by the requirement limit of the radius of a bent pipe and the thickness of pipe wall by bending a stainless steel pipe as a continuous row of bent pipe grate. The making method is characterized by embedding the portsat two ends of the stainless steel capillary pipe type grate bar in the walls of an upper water distribution pipe and a lower water distribution pipe, integrally forming with the upper distribution pipe and the lower water distribution pipe through embedding a pipe for casting, and when in use, connecting with an external water circulating temperature control system through a quick connection piping piece to finally realize the aim of controlling the temperature of the pipe type grate bar. The benefits include: rare break, no existence of leak points and the simultaneous reduction of the wallthickness of the grate pipe to enlarge the inner diameter of the grate pipe, smoother water flow and easy temperature control. The temperature control grate can be widely applied as a charcoal fire barbecue grate and to the fields of foods, medical products and anti-corrosion and temperature control required by scientific research and production of biological products, and is suitable for standardized production in scale.

The invention provides a long-spacing hinge seat positioning welding tool used in the technical field of workpiece / box hinge seats. The present invention also relates to a long-spacing hinge seat positioning welding method. Each of the long-spacing hinge seat positioning welding tooling has The positioning assemblies (1) respectively include a base (3), an ear plate (4), an adjustment bolt (5), an adjustment nut I (6), and an adjustment nut II (7). The base (3) is provided with a plurality of adjustment holes ( 8), an adjusting bolt (5) passes through each adjusting hole (8), the adjusting nut I (6) is screwed on the adjusting bolt (5) above the base (3), and the adjusting nut II (7) is screwed on On the adjusting bolt (5) under the base (3), the above-mentioned tooling and method can conveniently and quickly realize the positioning welding of multiple hinge seats. During positioning welding, the positioning size and the coaxiality requirements of each hinge can be effectively guaranteed, which can be used in subsequent products. The hinge arm no longer deforms or flips stuck when the hinge is flipped.

A jet arc ignition type long-distance high-energy plasma igniter, which is composed of an anode 109, an inner layer insulator 108, an intermediate arc ignition electrode 107, an outer layer insulator 106, and a cathode 105; these parts are nested and installed from inside to outside in sequence : the anode 109 is embedded in the inner insulating member 108 as a whole and embedded in the middle arc electrode 107; these three parts are embedded in the inner insulating member 106 as a whole, and the above four parts are embedded in the cathode 105 to form the overall structure of the igniter. The plasma jet propagates outward through the designed jet holes, and finally contacts with the external cathode, so that the air between the external cathode 105 and the anode 107 breaks down and conducts, forming a large-space discharge, thereby increasing the discharge distance and improving energy utilization, which can solve the problem of At present, the electric spark igniter has the problems of small spacing and low efficiency, and cannot meet the demand for large energy discharge.

The invention relates to a long-spacing signal processing thick film circuit. Most of long-spacing signal processing circuits used at present comprise discrete components, and when a set of components are damaged, the maintenance is always comparatively difficult. The long-spacing signal processing thick film circuit is a rectangular thick film block and comprises 20 acicular pins, which are arrayed in two rows at both sides of the thick film circuit, and a built-in long-spacing signal processing circuit, wherein a long-spacing signal input end is the pin 1 of a thick film; one end of a variable resistor R4 is grounded, and the other end of the variable resistor R4 is connected with the pin 20 of the thick film, together with a sliding end; one end of a variable resistor R9 is connected with the pin 4 of the thick film, together with the sliding end, and the other end of the variable resistor R9 is connected with a pin 10; the pins 14 and 19 of the thick film are connected with a +15V power supply; the pins 3 and 12 of the thick film are connected with a -15V power supply; and the pin 13 of the thick film is the OUT output end of a long spacing signal. The packaged thick film circuit disclosed by the invention has relatively low temperature drift, is easy to maintain and is more suitable for debugging the signal in the actual use.

The invention relates to a long spacing reverberation time obtaining method, particularly relates to a mirror image source method based long spacing reverberation time obtaining method, and aims to solve the problem of big errors of existing methods for obtaining long spacing reverberation. The long spacing reverberation time obtaining method includes arranging a point acoustic source (m, n) and a receiving point at the position which is z from the mirror image acoustic source in long spacing with a geometric reflection boundary, and subsequently performing calculation according to acoustic energy and the distance between the point acoustic source (m, n) and the receiving point to finally obtain long spacing reverberation time. The mirror image source method based long spacing reverberation time obtaining method is applicable to obtaining long spacing acoustic reverberation time of subway stations, passages and the like.