89results about How to "Does not affect work performance" patented technology

The invention provides a compressor base, and relates to the field of compressors. The compressor base comprises a supporting plate, the top of the supporting plate is fixedly connected with the bottom of a compressor body, shock absorbers are fixedly installed at the four corners of the bottom of the supporting plate, holes are formed inside the shock absorbers, and pressing blocks are arranged inside the holes. According to the compressor base, a first spring, the pressing blocks, a pressing rod, hydraulic oil, a piston, a buffer rod, a guide rod, a second spring and a third spring are arranged, and the surface of the guide rod is sleeved with the second spring and the third spring, so that the supporting plate moves under the effect of the pressing rod and the pressing blocks, the effect of the buffer rod and the piston and the effect of the second spring and the third spring, well buffering and damping on the compressor body are achieved, the compressor body is not likely to loosen, noise increase cannot be caused, the working performance of the compressor body is not influenced.

The invention relates to a concrete pavement material for heavy traffic roads and a preparation method thereof. The material is composed of a component A, a component B and a component C in a mass ratio of 1:(0.2-0.6):(4-8). The component A comprises the following components in parts by mass: 40-80 parts of epoxy resin, 0-20 parts of epoxy reactive diluent, 10-50 parts of elastic modifier, 0.2 part of defoaming agent and 0.2 part of dispersing agent. The component B comprises the following components in parts by mass: 100 parts of curing agent, 0-10 parts of curing accelerator and 1 part of coupling agent. The component C comprises the following components in parts by volume: 100 parts of fine stone, 30-300 parts of fine sand, 130-800 parts of waste rubber particle, 50-100 parts of waste rubber powder and 10-20 parts of crystal whisker. Compared with the prior art, the concrete pavement material for heavy traffic roads has the advantages of high strength, favorable durability, favorable roadability, energy saving, environment friendliness and the like, and is convenient for construction.

The invention discloses an engine exhaust gas waste heat recovery and control system and method based on organic rankine cycle, and belongs to the field of energy conservation and emission reduction. In the invention, a waste heat recovery system comprises engine cycle, organic rankine cycle, cooling water cycle and lubrication oil cycle which are coupled together; by means of reasonable control, the system can be convenient to start, stable to operate and rapid to stop according to the operation of the engine under different working conditions; in case of a system failure, the system can be emergently braked; and under the condition of no influence on the normal operation of the engine, the optimal performances of the system can be obtained finally, and the utilization ratio of the engine exhaust gas waste heat is improved greatly, thus thermal pollution of the engine exhaust gas to the environment is improved.

The invention discloses an MEMS thermal type wind speed sensor having an on-chip self calibration function. A thermal temperature difference signal provided by a heating element on a sensor encapsulation surface replaces a temperature difference signal generated by a wind tunnel, so the problem that sensor measurement and calibration must be performed in wind tunnel environment is prevented. The sensor has the advantages of simple structure encapsulation, very low testing cost and convenient maintenance, and can perform calibration detection on site.

The invention provides an optical module. The optical module comprises a lower shell and a circuit board attached to the lower shell, wherein an empty groove is formed in the circuit board, and a laser assembly and a silicon optical chip which are attached to the lower shell are arranged in the empty groove; a laser assembly which is in routing connection with the circuit board and is used for emitting light without carrying signals; and a silicon optical chip which is in routing connection with the circuit board and is used for modulating the light which does not carry the signal. In the present application, the empty groove is formed in the circuit board, the laser assembly and the silicon optical chip are arranged in the empty groove, and the circuit board, the laser assembly and the silicon optical chip are all directly fixed on the lower shell so that barriers among the laser assembly, the silicon optical chip and the lower shell are reduced, heat generated by the laser assembly and the silicon optical chip is conveniently dissipated in time, and the working performance of the optical module is not influenced.

The invention discloses a circumferential sectioned helium sealing device for an oxygen turbine pump of a hydrogen oxygen engine. According to the circumferential sectioned helium sealing device, a circumferential sectioned sealing ring I and a circumferential sectioned sealing ring II are placed in a cavity formed by a cover plate and a sealing shell; sealing shaft sleeves are placed in rings of the circumferential sectioned sealing ring I and the circumferential sectioned sealing ring II; the circumferential sectioned sealing ring I and the circumferential sectioned sealing ring II are oppositely placed and pre-tensioned by virtue of pre-tensioning springs; and each of the circumferential sectioned sealing ring I and the circumferential sectioned sealing ring II is formed by connecting a plurality of fan-shaped arc sections with the same structure end to end, and constrained on an excircle surface through garter springs. According to the circumferential sectioned helium sealing device, each sealing ring is composed of the plurality of fan-shaped arc sections, a hydrodynamic groove structure is introduced, and a hydrodynamic effect of a sealing clearance fluid is adequately utilized, thus the helium sealing device reliably works under an extremely small clearance, and a low leakage amount is maintained.

The invention discloses a tuning fork type micromechanical gyroscope capable of resisting a high-strength impact. The tuning fork type micromechanical gyroscope comprises two single-frame type structures in a bilateral symmetry manner, wherein the two single-frame type structures are connected through an intermediate coupling beam; each single-frame type structure comprises a driving mass frame, a detection mass frame which is arranged in the driving mass frame, a detection elastic beam structure, a driving elastic beam structure, and elastic limiting structures which are paired in the single direction of the horizontal and vertical directions; the detection elastic beam structure is connected with the driving mass frame and the detection mass frame; the driving mass frame is connected with an anchor point through the driving elastic beam structure; each elastic limiting structure comprises elastic limiting comb teeth which are connected to the anchor point, and a limiting stop block which is connected to the driving mass frame or the detection mass frame. By respectively designing the elastic limiting structures in the horizontal and vertical directions, when a main body structure is subjected to the high-strength impact, the elastic limiting structures limit the displacement of the main body structure in the horizontal and vertical directions, and structural damage caused after an elastic beam exceeds an elastic deformation limit during the displacement of the main body structure is avoided.

The invention provides a data service flow quota allocation method and a data service flow quota allocation device. The data service flow allocation method comprises steps that when a flow quota allocation updating condition is satisfied, a flow quota parameter of a user is determined, and the flow quota parameter is a quotient of a flow consumption value of a user and flow quota application times in a preset time period; a current flow quota application value is calculated according to the flow quota parameter; a gateway general packet radio service support node GGSN / data gateway P-GW is used to transmit a credit control request CCR message provided with the current flow quota application value to a business operation support system BOSS, and a new flow quota is applied to the BOSS. By adopting the above mentioned technical scheme, the flow quota application value is customized according to the Internet-surfing requirement of the user, and the rationality of the flow quota application value is guaranteed, and at the same time, the BOSS is not required to calculate, and is only required to determine whether the application of the flow quota is allowed, and therefore the processing load of the BOSS is reduced.

This invention relates to a photoelectric charger, a charging method and an electronic produc with it, in which, an electronic product with a charger includes a photoelectric charger, a host and a self-backup charge battery and the charger includes at least a photoelectric battery and an energy storager serial to the battery, the photoelectric battery charges to the energy storager, all energy storagers are connected with the self-backup batteries to charge to them, when charging, the photoelectric battery transfers light energy to electric energy and charges to the energy storager serial to it then the storager charges to the charge battery according to its voltage.

The invention discloses a liquid alkali-free accelerator and a preparation method thereof. The accelerator is prepared from the following raw materials in percentage by mass: 45 to 70 weight percent of aluminum sulfate, 2 to 10 weight percent of magnesium sulfate, 5 to 10 weight percent of organic amine, 0.2 to 0.6 weight percent of a modified suspending agent, 1 to 3 weight percent of a pH regulator, 0.1 to 0.5 weight percent of a viscosity reducer and the balance of water. The liquid alkali-free accelerator prepared by the invention can be used in wet shotcrete construction, and has the advantages of short setting time, high early strength, low liquid viscosity and the like. When the doping amount is 4%, the technical requirements can be met, and the concrete can be widely applied to supporting, repairing and the like of tunnels, highways, railways and subways.

The invention discloses a sewing machine for clothes processing. The sewing machine for clothes processing comprises support legs, a table surface, a rack, a top plate, a machine head, a working table, a goose neck tube, a fan, a lighting lamp, a cup holder, a dust collection hopper, a dust collection pump, a channel, a collection box and a drawer, wherein four support legs are uniformly arranged at the lower part of the table surface; the rack is fixedly and vertically arranged on the left side of the upper part of the table surface; the top plate is fixedly horizontally arranged at the upper end of the rack; the machine head is fixedly arranged at the lower part of the top plate; the working table is fixedly and horizontally arranged at the upper end of the rack; the machine head is fixedly arranged below the top plate; the working table which is fixedly mounted on the table surface is arranged right below the machine head; the fan is connected below the top plate and positioned on the left side of the machine head through the goose neck tube; the lighting lamp is arranged at the right side part of the rack. Compared with the prior art, the working performance of the sewing machine is improved, the adaptability of the sewing machine is improved, functions of the sewing machine are enriched, the working intensity of operators is alleviated, and great convenience is brought to clothes processing.

The invention discloses an inorganic mercury-substituting inhibitor for prolonging a storage life of a zinc air battery. The inhibitor is compounded by a plurality of inorganic compounds, comprises two or a plurality of anion groups selected from SnO3<2->, CL<->, SO4<2->, OH<->, NO4<->, SiO3<2->, PO4<3-> and two kinds or several kinds in citrate, and further comprises one to five kinds of cations: Y<3+>, <Bi3+>, <In3+>, <Ca2+>, <Ce4+>, <Na+>, La<3+> and <Ag+>. The inhibitor provided in the invention can completely replace mercury in the zinc air battery without affecting work performance of the battery. After storing zinc electrode added with the inhibitor and the zinc electrode containing 6% of the mercury at a temperature of 50 plus or minus 1 DEG C for the same time, the two electrodes are put in the zinc air battery with the same model to test discharge performance of the battery, the result is that the two electrodes have a fairly equal discharge performance.

The invention relates to coal mine roadway support machinery, in particular to a walking support which can realize temporary support and walking functions of a roadway, can be used for the temporary support of a roadway head and can be matched with a heading machine to finish the parallel operation of heading and support. The support comprises at least two branch supports, wherein the branch supports are connected by moving cylinders; a top bracing frame of each branch support is mounted on the upper part of a main frame by a slideway, the top bracing frame is connected with the main frame by a top support cylinder, lateral bracing frames are mounted at both sides of the main frame by slideways, and the lateral bracing frames are connected with the main frame by lateral support cylinders. Because of the telescopic control of the cylinders, the complete set of support can realize walking forwards or backwards; and each branch support is provided with a top bracing plate and lateral bracing plates, thereby supporting the roof and the lateral walls of the roadway. The invention can solve the problems that the effective footage time of the heading machine is too little, a large amount of working time is wasted and the like in the prior art.

The invention provides a miniaturized high-isolation circularly polarized diversity antenna based on dual-mode resonance. The miniaturized high-isolation circularly polarized diversity antenna comprises a metal floor, a dielectric layer and two groups of radiation units which are arranged in a mirror symmetry manner, wherein each group of radiation units comprises a radiation patch, a short circuit component group and a feed probe; the feed probe feeds power to the radiation patch, and the radiation patch is connected with the metal floor through the short circuit component group. The dielectric layer is located between the metal floor and the radiation patch; the short circuit component group is used for shielding the coupling between the two radiation patches and maintaining the resonant frequencies of a TM11 mode and a TM31 / 13 mode excited after the radiation patches are amplified by two times to be unchanged; the radiation patch is provided with a hollow-out groove, and the hollow-out groove is used for gathering part of electric fields of a TM11 mode and a TM31 / 13 mode. And the two groups of radiation units in mirror symmetry excite left-handed and right-handed circularly polarized waves respectively to form a diversity antenna. The working frequency of the radiation patch is the working frequency amplified by two times, and the isolation degree between the two radiation units is high, so that the diversity antenna can be made smaller under the condition that the working performance is not influenced.

The invention discloses a pneumatic transmission air compressor expansion auxiliary air storage tank device. The pneumatic transmission air compressor expansion auxiliary air storage tank device comprises a supporting base, an air compressor main air storage tank is arranged in the middle of the supporting base, connecting rotating shafts are arranged at the four corners of the supporting base, auxiliary air storage tank supports are installed on the connecting rotating shafts, the auxiliary air storage tank supports can rotate in the vertical plane around the connecting rotating shafts, mounting discs are fixedly arranged on the auxiliary air storage tank supports; air bag mounting plates are arranged on the mounting discs, and auxiliary air bag devices capable of stretching and contracting is arranged on one side of the air bag mounting plates. According to the pneumatic transmission air compressor expansion auxiliary air storage tank device, the auxiliary air bag devices capable ofstretching and contracting is arranged, the auxiliary air storage tank supports are rotated inwards along the connecting rotating shafts, the contracted auxiliary air bag devices can be clamped in anarea between the air bag mounting plates and the air compressor main air storage tank, the auxiliary gas storage tank supports are rotated outwards along the connecting rotating shafts, the auxiliaryair bag devices can be moved to the left side and the right side of the air compressor main air storage tank for stretching and storage, and the space utilization rate is improved under the conditionthat the working performance is not influenced.

The invention relates to a method for accessing shared display data, and belongs to the technical field of graphics acceleration driving. The method includes the steps that when an operating system is non free, non-accessed display data is stored in the memory of a CPU, and the stored display data serves as novel data; when the operating system is free, synchronization steps are subjected to looping execution; the synchronization steps include that according to the time of same novel data is accessed through the CPU and a GPU, the novel data is transferred to a video memory of the GPU and stored or continuously stored in the memory of the CPU. By means of the method, efficient accessing of the CPU and the GPU to display data is achieved, and meanwhile the working performance of a whole system is not influenced.

The invention relates to the technical field of micro electro mechanical systems, in particular to a water-resistant and oil-proof packaged differential pressure sensor, which comprises a substrate and a shell, and is characterized in that a sensing part and an integrated chip are arranged on the front surface of the substrate; the sensor comprises a cavity formed in the substrate; a first vent hole which is formed in the position, corresponding to the sensing part, of the front surface of the substrate and communicates with the cavity; a second vent hole which is formed in the back surface of the substrate and communicates with the cavity; a sensing part which detects ambient pressure, forms a first pressure signal and outputs the first pressure signal to the integrated chip; and an integrated chip which carries out temperature compensation on the first pressure signal according to a preset compensation coefficient so as to form a second pressure signal to be output. The sensor has the advantages that the temperature compensation function of the differential pressure sensor can be guaranteed, and the size of the differential pressure sensor is smaller; and meanwhile, under the condition that the working performance of an MEMS sensor is not influenced, the water resistance and oil resistance of the differential pressure sensor are improved.

The invention provides a multi-chip 3D stacked packaging structure with efficient heat dissipation and a packaging method. The structure comprises a rewiring layer; a first chip and a power device which are arranged on the rewiring layer and are electrically connected with the rewiring layer; a first heat insulation element which is positioned on the rewiring layer and is arranged between the power device and the first chip; a first packaging layer which is arranged on the rewiring layer and wraps and plastically packages the first chip, the first heat insulation element and the power device;an adapter plate which is arranged on the first packaging layer, wherein a second heat insulation element is arranged in the adapter plate; a second chip which is arranged on the adapter plate and iselectrically connected with the rewiring layer; and a second packaging layer which is arranged on the adapter plate and wraps and plastically packages the second chip. Thermal isolation is performed on the power device so that heat generated by the power device can be prevented from being transmitted to other chips in the transverse direction and the longitudinal direction, the power device is enabled to form an isolated heat source island and efficient heat dissipation can be realized.

The invention discloses a field effect transistor (FET) resistant to single-particle radiation and a preparation method thereof. The FET comprises a substrate, a shallow trench isolation region, a doped region, a source region, a drain region, a redundancy electrode region, a main transistor gate dielectric, a redundancy gate dielectric, a main transistor gate electrode, and a redundancy gate electrode. The preparation method belongs to a layout-level design reinforcing method and may suppress the sensitivity, to single-particle radiation, of the MOSFET at a source generating a transient pulse to a certain extent. Based on a charge sharing principle of an irradiation effect, the redundancy electrode region / a substrate pn junction is formed around a sensitive pn junction so that the operation of the MOSFET is not influenced when no radiation is generated and charges generated by a radiation ionization effect can be shared and collected when radiation is generated. Thus, the collected charges of the protected sensitive pn junction are reduced. In addition, compared with a design reinforcing method using high-density body contact / trap contact, the method of the invention requires small total layout area and achieves a higher integrated level.

The invention relates to a hypersonic efficient mixing spray pipe, which comprises a hypersonic oxidant spray pipe 1, periodically-arranged vanes 2 and a fuel spray pipe array 3, wherein a primary gas flow expands and accelerates through a molded surface of the hypersonic oxidant spray pipe 1 and is subjected to rectification and guidance through the periodically-arranged vanes 2, a secondary gas flow is sprayed via the fuel spray pipe array 3 at exit positions of the hypersonic oxidant spray pipe 1, the primary gas flow and the secondary gas flow are efficiently mixed to generate laser light-emitting medium along with a chemical pump reaction, and laser is extracted through a resonant cavity. The hypersonic efficient mixing spray pipe has the advantages that the hypersonic oxidant spray pipe is simple in processing, the hypersonic oxidant spray pipe is subjected to infinitesimal processing through the periodically-arranged vanes and the fuel spray pipe array, and the mixing efficiency improved.

The invention relates to a vent stop valve of a pressure gauge. The vent stop valve comprises a connecting pipe, a gasket, a connecting pipe nut, a valve body, a packing pad, a lower valve rod, filler, a compression ring, a blocking semi-ring, a locking nut, a valve rod nut, an upper valve rod, a hand wheel, a washer, a nut, a vent valve rod, a vent hand wheel, a vent washer, a vent nut, the pressure gauge, a pressure gauge nut and a vent hole. The vent stop valve is characterized in that the front of the valve body is additionally provided with a vent operating device, wherein the vent valve rod is connected with the valve body; the vent hand wheel is filled in the vent valve rod; the vent washer and the vent nut are connected with the vent hand wheel; the vent hole is at the lower part of the vent valve rod, a vent passage in the vent hole is connected with a valve chest; the vent hand wheel is screwed tightly clockwise; the vent passage in the vent hole is closed; when the valve is closed, the vent valve rod is turned counterclockwise, and the high pressure media in the pressure gauge and the valve chest is depressurized and vented through the vent hole; when a pipeline system requires depressurization, venting and pollution discharge, the valve is opened, the vent valve rod is turned counterclockwise and instantly the vent hole is ready for depressurization or pollution discharge.

The invention discloses a vacuum pump with a special-shaped cavity; the vacuum pump comprises a stator and a rotor; wherein the stator is a cylinder body provided with a special-shaped cylindrical-surface inner cavity, an inlet and an outlet; the special-shaped cylindrical-surface inner cavity is formed by two arc surfaces and two non-arc surfaces; the rotor is formed by a rotor body and two pairs of combination slide plates; the rotor body is a circular cylinder body provided with a transmission shaft, a centering shaft and a crossed guide groove; the two pairs of combination slide plates are vertically arranged in the guide groove; a cover plate is a flat plate provided with a bearing hole; the two end faces of the stator are matched with the cover plate to form into a sealing cavity; the rotor is matched with the bearing hole on the cover plate by the transmission shaft and the centering shaft; the external drive couple drives the rotor to rotate by the transmission shaft. When the rotor rotates, the combined arc surface of the special-shaped cylindrical-surface inner cavity matches with the rotor to control the two pairs of combination slide plates to slide alternatively to intake air through the inlet and press air out through the outlet, thereby forming negative pressure in the inlet area.

The invention provides an absorption state monitoring sensor suitable for being arranged in a disposable absorption product for use, which comprises a first detection loop, a waterproof protection mechanism and an infiltration and diffusion control mechanism, the first detection loop comprises a first detection electrode and a second detection electrode, and the first detection electrode and the second detection electrode comprise protected electrode parts and unprotected electrode parts; when excrement containing electrolyte liquid exists in the absorption article, an electric double-layer capacitor is generated between the first detection electrode and the second detection electrode, the capacitance value of the capacitor is in positive correlation with the specific surface area of the part, not soaked by the electrolyte liquid, of the protection electrode, and the capacitance value of the capacitor is gradually increased under the action of a soaking diffusion control mechanism. Theinvention further provides a disposable intelligent absorption article capable of providing absorption state information, a manufacturing method of the absorption state monitoring sensor, a manufacturing method of the disposable intelligent absorption article and a urine and excrement distinguishing method. The sensor has the advantages of being low in cost, easy to produce, good in universalityand the like.

The invention relates to an anti-crack fiber for water reducing type concrete and mortar. A preparation method comprises the following steps of: selecting horse chestnutn timber, extracting high-strength high-elastic modulus cellulose fiber thereof through biological fiber extraction technology, and coating a chemical alkali-resistant coating layer on the surface of the extracted cellulose fiber; and adding a water reducing agent to the cellulose fiber coated with the chemical alkali-resistant coating layer to prepare the anti-crack fiber for the water reducing type concrete and mortar. The fiber has natural hydrophilism and a hollow cavity structure; and the hollow cavity structure can store part of free water in the early hydration stage, does not influence the working performance of the concrete, the mortar and other cement-based composite materials, and can improve the working performance of the concrete, the mortar and other cement-based composite materials.

The invention relates to the technical field of tunneling equipment and exploratory drilling rig equipment of a fully mechanized drivage working face of a coal mine. In order to solve the problem of integrating tunneling equipment and exploring equipment, the invention provides the integrated tunneling and exploring machine which comprises a frame, a cutting mechanism, a loading mechanism, a scraper conveyer, a left traveling mechanism, a right travelling mechanism, an electric system, a hydraulic system, a cooling system, a protective assembly and an exploratory drilling rig system, wherein the left and right traveling mechanisms are arranged on the lower side of the frame; the cutting mechanism and the loading mechanism are arranged on the front part of the upper side of the frame; the protective assembly is arranged on the rear side of the frame; the exploratory drilling rig system is arranged on one side of the frame while the electric system, the hydraulic system and the cooling system are arranged on the other side of the frame; the scraper conveyer is arranged on the rear side of the frame. The integrated tunneling and exploring machine provided by the invention is small in boundary dimension and wide in application range of roadways, can be used for drilling in a certain azimuth range in front of a tunneling and fully mechanized drivage working face of a roadway of an underground coal mine, a half-coal tunnel and a stone drift, improves the utilization rate of equipment and realizes continuous tunneling and exploring work.

The invention discloses a contactless cold starting device of a proton exchange membrane fuel cell. The contactless cold starting device comprises a direct-current power supply, a microwave generator, a microwave output device and a microwave heater, which are connected in sequence, wherein the microwave heater is used for carrying out contactless microwave heating on the proton exchange membrane fuel cell locate at the outer part of the microwave heater. For not influencing a structure of the cell and a normal working state of the cell, a microwave heating principle is utilized and the fuel cell in a cold starting process is heated, so that on one hand, the structure of the cell does not need to be changed and the working performance of the cell is not influenced; on the other hand, the starting problem of the fuel cell under a lower temperature is solved better and a commercialization progress of the proton exchange membrane fuel cell is accelerated. Meanwhile, the single-ridge type microwave heater has an effective heating speed on a thin-sheet-shaped or linear object; moreover, the vehicle-mounted direct-current power supply can meet the power supply requirements of the microwave heater; the microwave heater has a small size and high microwave heating efficiency, and a whole cold starting system occupies a small space.

The invention discloses a gas compression pump with a special-shaped cavity. The pump comprises a stator and a rotor, wherein the stator is a cylinder with a special-shaped cylindrical surface inner cavity, an inlet and an outlet; the special-shaped cylindrical surface inner cavity is formed by combining two arc surfaces and two non-arc surfaces; the rotor consists of a rotor body and two pairs of combined sliding plates; the rotor body is a cylinder with a transmission shaft, a centering shaft and cross guide grooves; the two pairs of combined sliding plates are vertically arranged in the guide grooves; each cover plate is a flat plate with a bearing hole; the two end faces of the stator are matched with the cover plates to form a sealed cavity; the rotor is matched with the bearing holes in the cover plates through the transmission shaft and the centering shaft; an external driving couple makes the rotor rotate through the transmission shaft; and when the rotor rotates, the combined arc surfaces of the special-shaped cylindrical surface inner cavity are matched with the rotor, the two pairs of combined sliding plates are controlled to slide crosswise, gas is sucked into the inlet and pressed out of the outlet, and positive pressure is formed in an outlet area.

The invention provides a steel-tube square reinforced concrete member. The steel-tube square reinforced concrete member comprises a steel tube, concrete and internal reinforcements, wherein the internal reinforcements are surrounded by the concrete and arranged inside the steel tube, and include a square stirrup and longitudinal bars; the longitudinal bars are arranged along the square stirrup. The steel-tube square reinforced concrete member has the advantages that the section of the member or the thickness of the steel tube is reduced, the construction speed is increased and the fire-resistant performance of the member is good; the steel-tube square reinforced concrete member can be widely applied to civil architecture structure engineering including various high-rise structures, high-rise or ultrahigh-rise buildings, industrial factory buildings, support pillars of ocean platform structures or elevated railway bridges or highway bridges.

The invention discloses an interference-type optical fiber hydrophone optical path system and an acoustic signal detection method thereof. The interference-type optical fiber hydrophone optical path system comprises a light source modulation system, a circulator, an optical fiber hydrophone probe, a photoelectric detector, an analog-to-digital converter and a signal demodulation processor. A pulselight sequence output by the light source modulation system enters the optical fiber hydrophone probe through the circulator and divided into two ways in the optical fiber hydrophone probe, one way is used for sensing an external acoustic signal and is delayed, and the delayed light sequence interferes with the other way of light sequence to form a beat frequency optical signal; the photoelectricdetector converts the beat frequency optical signal into an analog beat frequency electrical signal, and the analog beat frequency electrical signal is converted into a digital beat frequency electrical signal through the analog-to-digital converter; and the signal demodulation processor stores the digital beat frequency electrical signal when the external acoustic signal does not exist, according to the stored digital beat frequency electrical signal when the external acoustic signal does not exist, a received digital beat frequency electrical signal when the external acoustic signal existsis subjected to signal demodulation processing, and the external acoustic signal is obtained.

The invention discloses a harmonic suppression circuit for a low-voltage distribution network. The harmonic suppression circuit comprises a voltage sampling circuit, a harmonic processing module, an error amplifier EA1, a multiplier M1, a comparator and an RS trigger, wherein the voltage sampling circuit is composed of a resistor R1 and a resistor R2; wherein the harmonic processing module is composed of an analog-to-digital converter, a phase-locked loop module, a Fourier analysis module, a multiplier M2, an adder A1 and a digital-to-analog converter; and a harmonic compensation function is realized through combination of current control and a harmonic processing module. The harmonic suppression circuit has the characteristic of high power factor and also has a harmonic compensation function. When the method is applied to a low-voltage local power distribution network, centralized harmonic suppression schemes such as an active filter can be optimized and even replaced.