60 results about "Four-force" patented technology

The invention provides a micro-silicon accelerometer which has the functions of measuring pressure and temperature. The micro-silicon accelerometer not only can measure the change of the pressure and the environment temperature of a system, but also can measure the acceleration; the invention also provides a processing method. The micro-silicon accelerometer comprises a silicon single-crystal underlay (1) of single crystallographic orientation; the two surfaces of the silicon underlay (1) are covered by a composite film insulation layer (2); the two cantilever beam areas of the frontal surface of the silicon single-crystal underlay (1) are provided with four heat diffusion resistances (3) so as to assemble a wheatstone bridge. The micro-silicon accelerometer is characterized in that a mass area which is connected with the two cantilever beams is a silicon mass block (4); furthermore, the frontal surface of the mass block (4) is provided with a multi-layer structure of silicon dioxide / PSG / polycrystalline silicon / silicon dioxide / polycrystalline silicon; wherein, the polycrystalline silicon on the top is prepared to be four force-sensitive resistances (5) with longitudinal piezoresistive effect; a middle polycrystalline film is an elastic film (6) of a pressure sensor; furthermore, the PSG and a phosphorosilicate glass layer which is arranged below the polycrystalline elastic film form a hollow chamber (11); an internal aluminium wire is connected with four force-sensitive resistances (5) with the longitudinal piezoresistive effect so as to assemble the wheatstone bridge used for measuring the pressure change; furthermore, a boron-phosphorus area is arranged on the frame of the accelerometer so as to assemble the EB-junction (7) of an n-p-n triode.

The invention provides a novel micro-pressure sensor chip. The chip comprises a monocrystalline silicon wafer, substrate glass and four force-sensing resistors, wherein the positive side of the monocrystalline silicon wafer is provided with a convex beam, and the four force-sensing resistors are respectively arranged on the convex beam; a groove is formed on the back side of the monocrystalline silicon wafer, and at least two back islands are formed at the bottom of the groove; the convex beam is arranged corresponding to the position of the groove; a frame is formed on the periphery of the groove on the back side of the monocrystalline silicon wafer, and is in bonding encapsulation with the substrate glass. According to the integrated chip design of the islands and the beam, large deformation of the chip under high pressure is avoided, and a good effect of concentrating stress is played, the sensitivity, linearity and overload resistance are improved, and the problems of low sensitivity and poor overload resistance of a conventional flat film structure chip are solved. The novel micro-pressure sensor chip can sense the micro-pressure of between 0 and 200Pa, and has good economical benefit and social benefit.

The invention relates to an axle-system axial pulsating force measurement device, which is applicable for measurement of axial pulsating force and axial thrust and is characterized in that the device comprises a first positioning flange and a second positioning flange; the first positioning flange and the second positioning flange are fixedly arranged on an axle with certain spacing between; two dowel bars are symmetrically arranged and are respectively sheathed in a chute of the second positioning flange in a sliding way; four force reeds are arranged at two sides of the second positioning flange in a two-to-two symmetrical way; four strain gauges are arranged on the force reeds in an attaching way and adopt full-bridge connections among each other, and output ends thereof are connected with a telemetering data collection system. The invention provides the measurement device with simple structure and high measurement precision for pulsating force measurement, adopts microstrain measurement technology combining mechanical amplification and full-bridge connection of strain gauges, precisely measures the axial pulsating force of the axle system and provides precise parameters for the improved designing for reducing vibration noise of the axle system and related components.

The invention belongs to the field of aerospace dynamics tests and relates to a five-degree-of-freedom full-aircraft drop test aircraft posture follow-up control device. The follow-up control device comprises pulleys, four force bearing uprights, tension ropes, sliding barrels and upright supports, the force bearing uprights are symmetrically arranged on two sides of a test aircraft in a front row and a rear row and fixed by the upright support, the pulleys are arranged at the tops of the force bearing uprights and the ground among the force bearing uprights, a movable sliding barrel is arranged in the middle of each force bearing upright, wings of the test aircraft are connected with the sliding barrels by the tension ropes through the pulleys on the ground and at the top ends of the force bearing uprights, and an undercarriage is directly connected with the sliding barrels on the force bearing uprights through the tension ropes horizontally. The five-degree-of-freedom full-aircraft drop test aircraft posture follow-up control device has the advantages of simple structure, high reliability, capability of realizing automatic tracking, easiness in adjusting and low manufacturing cost.

The invention relates to a floating sea wave power generation device with force-amplifying mechanisms. The floating sea wave power generation device comprises an outer barrel, a floater device, a force-amplifying device, a hydraulic cylinder device, an oil tank, a hydraulic motor and a power generator, wherein the force-amplifying device is arranged on the floater device, the oil tank is arranged on the hydraulic cylinder device, and the hydraulic motor and the power generator are arranged on the oil tank and connected with each other; the floater device comprises four floating bodies, the hydraulic cylinder device comprises six hydraulic cylinders arranged in parallel, one ends of the hydraulic cylinders are hinged to the bottom of the oil tank, and the other ends of the hydraulic cylinders are connected with the force-amplifying device through a connection platform; the outer barrel is arranged on the lower portion of the oil tank, and the hydraulic cylinder device is sleeved with the outer barrel; the force-amplifying device comprises four force-amplifying mechanisms, each force-amplifying mechanism comprises a lever, a connection rod and a supporting rod, one end of each supporting rod is connected to the upper portion of the bottom of the outer barrel, the other end of each supporting rod is connected to the fulcrum of each lever, one end of each lever is connected to one end of each connection rod, the other end of each lever is connected to each floating body, and the other end of each connection rod is connected to the lower portion of the connection platform. The floating sea wave power generation device makes full use of sea wave energy and enhances power generation capability.

The invention discloses a fuzzy control method for generating crowd animation. The method includes the following steps: (1) a user inputs the number and the property of individuals of a crowd and the overall control parameters of the crowd so as to generate the crowd animation which is required by the user in real-time; (2) the individuals of the crowd move in a virtual scene under the action of four forces, namely, the field force of vector of F<vector>, combined application force of F<base>, leading force of F<follow> and resistance of F<brake>; and the fuzzy control process of the crowd is realized according to the distance between the current location and the target location of the individuals of the crowd by the design of a weighting curve w(t) to adjust the respective ratio accounted for by the weighting w of the four forces, namely, the field force of vector of F<vector>, combined application force of F<base>, leading force of F<follow> and resistance of F<brake>, so as to guarantee that the crowd smoothly and naturally moves towards the target location. The method of the invention can generate the crowd animation containing hundreds of thousands of individuals in real-time, vividly maintain the individual property of the crowd during the moving process, and simulate the overall motion behavior of the crowd in natural condition.

The invention discloses a pulling and pressing both-way decoupling and parallel connecting three-dimensional force sensor. A loading plate is arranged on an outer frame and provided with three nuts with the center connecting lines forming a regular triangle. The lower ends of supporting studs meshed with the nuts are connected with a force measuring plate. Three horizontal adjusting bolts are arranged on the side face of the force measuring plate, wherein the included angle formed by the corresponding center lines of the horizontal adjusting bolts is 120 degrees. The bolt heads of the bolts are located outside the outer frame. The force measuring plate is further provided with three vertical adjusting bolts with the center connecting lines forming a regular triangle, and the lower ends of the vertical adjusting bolts are located on a bottom plate of the outer frame. Four force measuring branch chains are arranged between the force measuring plate and the outer frame, the structures of the three horizontal force measuring branch chains on the side face of the force measuring plate are the same, the center lines of the three horizontal force measuring branch chains on the side face of the force measuring plate are located on the same horizontal plane and intersect with one another at one point of the force measuring plate, the 120-degree included angle is formed by the corresponding center lines of the three horizontal force measuring branch chains and vertical force measuring branch chains are arranged below the force measuring plate, wherein the center lines of the vertical force measuring branch chains are perpendicular to the center lines of the three horizontal force measuring branch chains and pass through the intersections of the center lines of the three horizontal force measuring branch chains. The pulling and pressing both-way decoupling and parallel connecting three-dimensional force sensor is small in inter-dimensionality coupling, high in measuring precision, simple and compact in structure and convenient to assemble and adjust, and the both-way decoupling measurement on the three-dimensional pulling and pressing force can be achieved easily.

The invention discloses a high-speed train power closed loop hanging-type gearbox reliability test bench, so as to overcome the problem that a reliability test can not be carried out on the actually-operating train gearbox. The high-speed train power closed loop hanging-type gearbox reliability test bench comprises a rectangular bearing platform, a gantry vertical excitation device, a vertical hanging device, a vibration shaft device, a transverse excitation device and a motor torque force measurement device, wherein the gantry vertical excitation device is arranged at the rear end of the rectangular bearing platform; the vertical hanging device is arranged at the top end of the gantry vertical excitation device; the vibration shaft device is arranged in a first U-shaped groove and a second U-shaped groove of the vertical hanging device; the transverse excitation device is arranged in front of the gantry vertical excitation device; a two-force rod fork of the transverse excitation device is in rotary connection with a first shaft head assembly in the vibration shaft device; first counterforce supporting seats in four counterforce seat assemblies of the motor torque force measurement device are symmetrically arranged at the left side of the first U-shaped groove and the right side of the second U-shaped groove; and four force measurement sensors are in bolt connection with the first U-shaped groove and the second U-shaped groove.

The invention discloses a method for testing the static creep endurance quality of PET industrial yarns. The test method is characterized by comprising the following steps: (1) extracting samples from products, testing the breaking strength of the samples, and calculating the average breaking strength of the samples; (2) testing four force values, namely 80% of the average breaking strength value, 83% of the average breaking strength value, 87% of the average breaking strength value and 90% of the average breaking strength value; (3) after testing, automatically calculating the creep rupture time of the samples under each fixed force value by a tensile machine; (4) recording creep rupture time of the samples under each force value, wherein five samples are tested under each fixed force value; (5) calculating Lg (T) value of each creep rupture time; (6) mapping by taking the loading value of each dtex as the horizontal ordinate and the Lg (T) value as the vertical coordinate; (7) calculating the standard deviation s of the Lg (T) value of each creep rupture time of each sample under each force value, and then calculating the Km value; and (8) in the production process, selecting the samples, testing, calculating, and comparing with the characteristic curve, if all the measurement results are on the characteristic curve the test is qualified, and the qualified results are the characteristic coefficient values of the static creep rupture.

The invention relates to a temperature compensation assessment method based on the silicon-piezoresistant principle, and belongs to the technology of silicon-piezoresistant temperature compensation. Resistance values of four force-sensitive resistors, which form a Wheatstone bridge of a silicon piezoresistant chip, in different temperatures and pressures are used as input values, different compensation circuit structures, compensation devices and compensation device parameters are used as variables, a mathematical model is established, the different compensation circuit structures are analyzed and automatically calculated to obtain compensation results related to the variables, and theoretical compensation results in the temperatures and pressures are used to roughly estimate whether an intermediate compensation variable is proper and estimate the selection range of the intermediate compensation variable. The mathematical model which can automatically process data in a batch manner is established on the theoretical analysis basis, and assessment for a certain temperature compensation algorithm can be rapidly and accurately obtained via the mathematic module before a product is realized, and the method is highly in practical values.

The invention discloses an automobile and a shifting device and a shifting control method thereof. The shifting device comprises a magnetic sensing layer, a first electromagnetic attractor, a second electromagnetic attractor and four force sensors, wherein the magnetic sensing layer coats a shifting handle, the first electromagnetic attractor and the second electromagnetic attractor are respectively matched with the magnetic sensing layer, and the four force sensors are arranged at shifting strokes of the shifting handle. The shifting device has the advantages that in the shifting process, when the shifting handle is moved to the specified position, the corresponding sensor is used for detecting the action force on the shifting handle, so the current position of the shifting handle can be judged according to the action force, and the opening and closing of the two electromagnetic attractors can be controlled according to the current position; when the electromagnetic attractors are opened, the absorbing function is generated with the magnetic sensing layer coating the shifting handle, and the attraction feel is generated in the shifting process, so the stronger attraction feel is realized in the shifting process, the shifting comfortability is improved, and the NVH (noise, vibration and harshness) property of the whole vehicle is improved.

A static measurement method and device for the centroid position of a vehicle belong to the technical field of vehicle centroid measurement. The invention aims to solve the problem that the action point of force borne by a vehicle cannot be accurately measured in the prior art. According to the static measurement device for the centroid position of a vehicle, the lower parts of symmetrical parallelogram mechanisms are connected to a base, and the upper parts of the symmetrical parallelogram mechanisms and a measurement platform are connected by measurement platform hinges. Four wheel force measurement boards are arranged in four empty slots of the measurement platform. The wheel force measurement boards are placed on the tops of the symmetrical parallelogram mechanisms, and four force sensors are evenly distributed between the wheel force measurement boards and the symmetrical parallelogram mechanisms. A tilt angle sensor is installed on the bottom of the measurement platform. The upper end of an electric cylinder is connected with the measurement platform, and the lower end of the electric cylinder is supported by the base. The measurement platform and the base are connected by base hinges. The positions of the stress points of the wheels on the wheel force measurement boards can be calculated according to the measured values of the force sensors, and thus, the spatial coordinates of the stress points of the wheels can be obtained. The measurement error caused by the inaccurate stress positions of the wheels is avoided, and the measurement accuracy is improved.

The invention relates to a force arm cross beam micro jacking device of an ultra-large tool edge type torque standard machine. The force arm cross beam micro jacking device is provided with a force arm cross beam, the middle of the force arm cross beam is vertically erected on a tool bearing seat through a tool, the force arm cross beam can swing freely around a supporting point formed by a tool component and the tool bearing seat, four force arm cross beam supports are arranged and symmetrically distributed on the two sides of the force arm cross beam in a bilateral symmetry mode, jacking stand columns are arranged below the force arm cross beam supports respectively, the lower portion of each jacking stand column is connected with a corresponding jacking assembly formed by a force sensor and a high-precision driving motor, and the jacking assemblies are fixedly connected with the base. Non-contact high-precision displacement sensors fixed to the base are arranged below the two sides of the force arm cross beam respectively. The self-locating function is achieved, the position of the force arm cross beam can be effectively limited, and it can be guaranteed that the relative position between the tool and a tool bearing can be completely restored to the initial assembling position of the force arm cross beam in the lifting process. Therefore, the common problems that in the tool edge type torque standard machine, the position of the force arm cross beam is uncertain, and the force arm cross beam can be deviated easily are solved.

The invention relates to a swingable deflection deformation compensation device for a ram. The upper side and the lower side in the ram are respectively provided with two groups of force application rods, namely one group of pull rods and one group of push rods. Four force application rods are distributed along the central line of a spindle of the ram in a central symmetry mode and respectively arranged at four corners of the cross section perpendicular to the surface of the ram. Four series supercharged type hydraulic oil cylinders are respectively connected with the four force application rods, oil inlets of the four oil cylinders are respectively connected with the same oil inlet loop, oil outlets of the four oil cylinders are respectively connected with the same oil outlet loop, and the oil pressure and flow of the four multistage series supercharged oil cylinders are controlled by corresponding hydraulic control loops so that adjustment of acting force of corresponding force application rods and conversion between push acting force and pull acting force can be achieved. The swingable deflection deformation compensation device for the ram can adjust the size and direction of the acting force of the hydraulic force application rods in real time, additional axial deformation can not happen, and comprehension effects are good.

The invention relates to a rock test piece fixture suitable for a true triaxial tensile test and a use method of the rock test piece fixture. The fixture comprises a normal positioning base, a lower clamping block, an upper clamping block, a left clamping block, a right clamping block, and a pressure conversion tension assembly, wherein the pressure conversion tension assembly is composed of a left pressing plate, a left pulling plate, a right pressing plate, a right pulling plate, and four force-transmitting rods. The method includes the following steps that: a test piece is bonded between the left clamping block and the right clamping block; the clamping surfaces of the lower clamping block and the upper clamping block are coated with a friction reducing material, and the lower clampingblock and the upper clamping block are respectively fastened onto the upper surface and lower surface of the test piece, and the four clamping blocks are bolted to the test piece, so that a combined body can be formed; the front surface and back surface of the test piece are coated with a sealant, and then are dried, bolts on the combined body are removed; the left pulling plate and the left clamping block are fixed together, the right pulling plate and the right clamping block are fixed together, and then, the four force transmitting rods, the left pressing plate and the right pressing plateare sequentially installed; and the normal positioning base is installed on a downward pressing head in a pressure chamber, and the lower clamping block of the combined body is installed onto the normal positioning base, the pressure chamber is closed, and confining pressure, normal stress and tensile stress in the direction of minimum principal stress are applied sequentially until the tensile failure of the test piece occurs.

The invention discloses a cam type wave generator. The cam type wave generator comprises a cam and a flexible bearing sleeved with the cam. The polar equation of a cam contour line of the cam is thatwhen Psi is greater than or equal to 0 and smaller than or equal to Beta-Beta1, Rho Delta is equal to r+[Omega0*m / (A-4 / Pi)][AcosPsi+PsisinBetasinPsi-4 / Pi]; when Psi is greater than or equal to Beta-Beta1 and smaller than or equal to Beta, Rho Delta is equal to r+[Omega0*m / (A-4 / Pi)][AcosPsi+PsisinBetasinPsi-4 / Pi]+0.5Delta0{1+cos[Pi(Psi-Beta) / Beta1]}; when Psi is greater than or equal to Beta and smaller than or equal to Beta+Beta2, Rho Delta is equal to r+[Omega0*m / (A-4 / Pi)][BsinPsi+(Pi / 2-Psi)cosBetacosPsi-4 / Pi]+0.5Delta0{1+cos[Pi(Psi-Beta) / Beta2]}; and when Psi is greater than or equal to Beta+Beta2 and smaller than or equal to 90, Rho Delta is equal to r+[Omega0*m / (A-4 / Pi)][BsinPsi+ (Pi / 2-Psi)cosBetacosPsi-4 / Pi]. With the corrected four-force acting cam contour line, the load carrying capacity and efficiency of a harmonic reducer are improved and the service life of the harmonic reducer is prolonged; with the shape of the cam contour line at the acting position of correction force F,the deformation and stress conditions of the flexible bearing are improved; and by optimizing the parameter value of the cam contour line, the stress value and the meshing quality of a flexspline areimproved.

Bilateral drive four-point force press, which includes: a main shaft, a first eccentric force application point, a second eccentric force application point, a third eccentric force application point, a fourth eccentric force application point, a driver, a first flywheel and a second flywheel, a second eccentric force application point, A clutch and a second clutch, the first eccentric force application point, the second eccentric force application point, the first flywheel and the first clutch are located on one side of the main shaft, the third eccentric force application point, the fourth eccentric force application point, the second flywheel and the second clutch Located on the other side of the main shaft, the driver drives two flywheels to rotate at the same time. The two flywheels drive a main shaft to rotate through the action of two clutches. Four eccentric force application points are installed on the main shaft, and the main shaft drives the slider through the action of four eccentric force application points. It moves up and down, thereby driving the upper mold of the press mold installed on the bottom plane of the slider to reciprocate up and down, and completes the processing of the workpiece between the upper mold and the lower mold. The movement precision, the bottom dead point precision, the guide precision and the precision of the workpiece processing of the slider are improved, and at the same time, it is beneficial to prolong the service life of the press machine and the mold.

The invention discloses an on-track plugging device which is convenient to perform on-track operation by an astronaut, easy to apply force, uniform in plugging stress, and high in visibility. The on-track plugging device mainly comprises a mobile phone rack component, a gear component, a ball screw component, and a bolt gear rack component. Through above components, the linear movement in a plugging work is transformed to be a rotating movement; the plugging work of a spaceflight module is realized by means of the principle of acting force and counter-acting force. The on-track plugging device provided by the invention meets the design of ergonomics, and is easy to plug when astronaut replaces the device on track; moreover, the linear movement for the plugging action is transformed to be rotating movement, thus the astronaut operation is benefited, and force increasing effect is obvious; four force applying points are symmetrically arranged by taking the connector as a center approximately; the force applying acting points for plugging are dispersed, the connector stress is uniform and free from lateral moment, and the connector is not easy to damage; the shortcomings of difficulty of secondary plugging in the prior art are solved.

The invention provides a dike breach closure device. According to the dike breach closure device, water dike slopes on the two sides of a dike breach are protected by waterproof fabric so as to prevent the dike breach from enlarging again, the portions, on the two sides of the dike breach, of the dike surface are connected through four force cables, the force cables are divided into two sets in sequence, and four iron rails are placed in the dike breach along the corresponding force cables; and a proper point is set in each force cable set on the bank, iron columns are erected at the proper points, the top ends of the iron columns are connected through a circulating force cable, a water-retaining steel plate is vertically hoisted to the circulating force cable at the top end, two chains are fixedly placed at the top end of the water-retaining steel plate in advance in the mode that the cables are processed through skew intersection by using the length midpoints as the intersection points, the ends of the chains are connected with the top ends of hydraulic cylinders on transverse steel plates placed on the sets of iron rails respectively, the combination between the chains and the hydraulic cylinders are divided into two pairs in a skew mode, when one pair of hydraulic cylinders draws back, the water-retaining steel plate is pulled to move downwards, the other pair of hydraulic cylinders can stretch out at the same time, and therefore continuous stretching and drawing operation is conducted, the water-retaining steel plate can be vertically pressed to the underwater position with the mud depth of five meters along with the iron rails, the dike breach with the width of about 100 meters is covered block by block, and sealing of the dike breach and closure can be rapidly accomplished in about six hours.

The invention discloses a device and method for internal and external rotation rehabilitation training of an ankle. The device comprises a bearing mechanism, a driving part, a transmission part and a detection part. The bearing mechanism comprises a base supporting frame, a supporting plate and an angular contact ball bearing. The driving part comprises a motor and a speed reducer. The transmission part comprises a small gear, a large gear and a worm and gear. The detection part comprises a two-axis torque sensor and an encoder installed on the motor, wherein the two-axis torque sensor is composed of a torque sensor and four force sensors. According to the device and method for internal and external rotation rehabilitation training of the ankle, the internal / external rotation single joint rehabilitation training of the ankle of the human body can be achieved; through application of the two-axis torque sensor composed of the torque sensor and the four force sensors and the encoder, patients' torque, motion positions and the like in the training process can be obtained, rehabilitation training and information detection functions are integrated, the basis is provided for a rehabilitation evaluation system, and the device is simple in overall structure, easy to produce and convenient to maintain.

The invention relates to the technical field of six-axis force sensors, and discloses a novel strain type six-axis force sensor, which comprises a six-axis force sensor main body. The six-axis force sensor main body comprises an elastic element, an upper cover plate and a lower cover plate, wherein the upper cover plate is mounted at the upper part of the elastic element; the lower cover plate ismounted at the bottom of the elastic element; the elastic element comprises a square wheel rim, a cross beam, a square flange measuring part and parallel beams arranged on the four inner side walls ofthe square wheel rim respectively; the parallel beams are spaced from the top surface and the bottom surface of the square wheel rim; the cross beam is provided with four force measuring arms; any two adjacent force measuring arms are perpendicular to each other; the four force measuring arms are connected with the four parallel beams in a one-to-one correspondence manner; the force measuring arms are perpendicular to the parallel beams correspondingly connected with the force measuring arms. The elastic element of the six-axis force sensor adopts an integrated design, the structure is compact and firm, the measurement precision is high, the mutual interference is small, the overall height of the six-axis force sensor is low, and the six-axis force sensor can be used in a low space.

The invention provides a demonstration instrument for addition and subtraction characteristics of an electrical bridge, and belongs to mechanical and electric components. The demonstration instrument comprises a numerical value display unit, a bridge type circuit display unit, a test component strain gauge position display unit and an operation unit, wherein the numerical value display unit comprises a stain value display module and a resistance increase value display module; the bridge type circuit display unit comprises a bridge type circuit display pattern; the strain gauge position display unit comprises a test component strain gauge position schematic diagram region, four forced direction control buttons and four strain gauge adhesion position control buttons; and the operation unit comprises a power switch, a zero setting button, a loading button, a graph transformation gear and a graph structure switch. By electrical bridge demonstration, the adhesion position and the direction of a strain gauge are directly related to the output characteristics of the electrical bridge when the strain of a certain component is measured in an electronic logging experiment, and the addition and subtraction characteristics of the electrical bridge, the practicability of a bridging method and the practicability of a connecting method of the resistance strain gauge in a bridge circuit can be observed clearly.

The invention discloses a calculation method for macromolecule dihedral angle interaction forces for calculating interaction forces of four-point dihedral angle structures. The method comprises that positions of four atoms in three-dimensional space are expressed to be four direction vectors; four four-inner-product directional derivative vectors, eight three-point included angle directional derivative vectors and four double-tangent directional derivative vectors are calculated successively; four dihedral angle directional derivative vectors, an energy scalar derivative and the like are calculated; and vectors of four forces are calculated, and the calculation is completed. According to the calculation method, the data structure is simple, the calculation process is clear, and calculation errors are easy to control.

The invention relates to a self-reset frictional sliding isolation bearing. The self-reset frictional sliding isolation bearing comprises a bottom plate, wherein the bottom plate, a single-sided bottom plate friction plate and a fixed double-sided friction plate are welded with an outer annular plate; a movable double-sided friction plate, a connecting plate and a bearing platform plate are integrally connected, and the movable double-sided friction plate and a forced reset device are positioned between the bottom plate and the fixed double-sided friction plate; the bottom surface of a friction plate of the bearing platform plate is in contact with the fixed double-sided friction plate; four foundation micro-vibration and wind response control devices and four automatic reset devices are uniformly arranged at the upper part of the outer annular plate along the circumference, the forced reset devices are of four sections of circular arcs, and the two ends of the circular arcs are connected with the outer annular plate through springs; four forced reset operation holes are arranged on the outer annular plate, and eight screw holes which are uniformly distributed along the circumference are arranged on the outer annular plate; and eight bolts are uniformly arranged on the bearing platform plate. The self-reset frictional sliding isolation bearing disclosed by the invention has greater vertical and horizontal rigidity, and can ensure the normal use of a building, improve the comfort in living and the safety performance, improve the range of working temperature and the durability and realize a good instant automatic reset function.

The invention discloses a four-force intersected single-workpiece linked clamping device. The four-force intersected single-workpiece linked clamping device comprises a fixture body, a plurality of pressing plates, a plurality of V-shaped blocks, a circular cavity, a plunger, a screw plug, sliding columns and liquid plastic, wherein a plurality of open grooves are perpendicularly arranged on the fixture body and the internal part of each groove is rotatably connected with the pressing plate through rivets; two pressing plates are oppositely arranged and the V-shaped blocks are arranged below the two pressing plates; the circular cavity is horizontally arranged in the lower part of the fixture body, one end of the circular cavity is connected with the plunger, the other end of the circular cavity is connected with the screw plug and the sliding columns are respectively arranged at the tail ends of the circular cavity; one ends of the sliding columns are fixed with the lower parts of the pressing plates through screws; the circular cavity is filled with the liquid plastic. The our-force intersected single-workpiece linked clamping device provided by the invention has the advantages that one workpiece can be evenly clamped from all directions by operating one handle, multi-point clamping of the workpiece can be realized, the precision can be effectively improved and the device is applicable to the precision machining process.

The invention discloses a real-time monitoring device and method for cutting force signals in the machining process. The device comprises an annular force measuring device. The annular force measuring device comprises a body with a hole formed in the middle. The annular force measuring device is arranged on a motorized spindle body in a sleeving manner through the middle hole and clamped and fixed between a motorized spindle flange and an equipment fixing flange. Four force sensor containing holes are formed in the same circumferential direction of the body at the interval of 90 degrees. A three-way force sensor is fixed in each force sensor containing hole. A groove where a signal line of the three-way force sensor penetrates is formed in the outer side of each force sensor containing hole. The signal line of each three-way force sensor is sequentially connected with a front amplifier, a data collection card and a computer. The real-time monitoring device is simple and reliable in structure and high in universality.

The invention provides an engineering machinery test bench, which comprises an engineering machinery frame, a frame rotating device and four brackets. The frame rotating device and the brackets are installed on the construction machinery frame. The brackets are horizontally placed. Four hydraulic drivers, four force detection devices and four ball connecting devices are installed at the ends of the brackets in sequence. A middle support seat is installed at the lower part of the rotating device. By simulating the support reaction loaded on vertical support legs, tests of the engineering machinery frame and the brackets under static and dynamic working conditions, extreme working conditions and fatigue working conditions are carried out by means of the test bench, and thus, parameters suchas stress and deformation can be researched and analyzed.

The invention relates to a force feedback type underwater cable guider, which is used for a cable burying device of underwater construction. The underwater cable guider comprises a guiding frame and at least four force feedback mechanisms connected with the guiding frame, wherein through holes used for passing through a cable are arranged on the guiding frame along an axial direction; radial slot holes communicated with the axial through holes are uniformly arranged on the guide frame along a radial direction; and each force feedback mechanism is arranged in each radial slot hole and extends into each axial through hole. When the force feedback type underwater cable guider is used, the cable passes through the axial through holes of the guiding frame, and a signal output end of each force feedback mechanism is communicated with an external control system. The installation position of the cable guider is closer to a cable burying point, the underwater cable guider monitors and feeds back the stress state of each direction of the cable near the burying point, judges the current state of the cable intuitively and quickly through the change of the stress direction and size and correspondingly regulates the tensioning force and the release rate of a cable tensioner according to the state, therefore, the occurrence of unfavourable conditions, such as cable aground, too large tensioning force, and the like is effectively avoided. The underwater cable guider has the advantages of simple structure and reliable performance and is convenient for maintenance.

The invention relates to a numerical control right-angle plate shearing machine. The numerical control right-angle plate shearing machine comprises a machine body (1) and an upper knife carrier (2). At least four driving mechanisms used for driving the upper knife carrier (2) to make vertical motion are arranged above the upper knife carrier (2), and the resultant moment of longitudinal component force applied to the upper knife carrier (2) by all the driving mechanisms is zero. According to the numerical control right-angle plate shearing machine, two servo motors are used for controlling four force bearing points to operate precisely and synchronously, the lateral force generated in the shearing process is not completely borne by a ball linear guide rail on the side face of the upper knife carrier any more, meanwhile, three driving points are further placed over shearing loads, most of the shearing loads can be borne, the tilting moment generated at the center of the upper knife carrier by the shearing loads is basically offset, the influence of stress deformation of the ball linear guide rail due to working loads in operating of the upper knife carrier is greatly reduced, operation is more steady, and shearing precision is also improved; meanwhile, due to the fact that all transmission structures are in a rolling friction mode, energy loss is lower.