551 results about "Height difference" patented technology

The invention provides a mountain slope transmission system catenary determining method and device, and the method comprises the steps: obtaining the arrangement parameters of a transmission system on a mountain slope, and the arrangement parameters at least comprise the horizontal distance between two fixed points of the transmission system, the vertical height difference, and the total length of a rope of the transmission system; based on the arrangement parameters, a simultaneous equation with the catenary opening coefficient as a core unknown quantity is established, and the simultaneous equation comprises the arc length constraint of the catenary and the height difference constraint of the two end points at the same time; solving the simultaneous equation to obtain a numerical solution of the catenary opening coefficient; and determining a catenary shape and a core engineering index of the transmission system on the mountain slope under the action of gravity according to the solved catenary opening coefficient. According to the method and the device, the engineering design precision is improved, and material redundancy and adjustment cost caused by shape uncertainty are saved.

The invention provides a calibration process and a calibration block of a contourgraph, and relates to the technical field of contour parameter calibration, in the calibration process of the contourgraph, first scanning data is obtained by scanning a gauge block calibration part of the calibration block, second scanning data is obtained by scanning a standard ball calibration part of the calibration block, and the first scanning data and the second scanning data are obtained based on a physical model among a probe, a rotating shaft and a sensor. The measuring height difference between the first calibration plane and the second calibration plane, the straightness of the inclined plane, the measuring diameter of the fitting circle, the actual height difference of the gauge block calibration part and the actual diameter of the standard ball calibration part are calculated, and the position relation among the probe, the rotating shaft and the sensor is calculated at least with the minimum straightness of the inclined plane as the constraint. The calibration data not only have the height of the gauge block and the diameter of the standard ball, but also introduce the straightness of the inclined plane, and the calibration data is increased, so that the calibration precision is improved, and the nonlinear error caused by the difference between a mechanical structure and a theoretical model can be reduced.

The invention provides a large-view-field-oriented dispensing method and system, and the method comprises the steps: obtaining imaging parameters of an industrial camera above a dispensing machine, controlling a dispensing head to carry out sparse sampling in the height direction, carrying out grid scanning at a plurality of discrete height layers, and obtaining object image mapping relation matrixes corresponding to the discrete height layers; acquiring the surface height of a to-be-dispensed workpiece, selecting the object image mapping relation matrix of the discrete height layer which is closest to the surface height of the workpiece and is smaller than or equal to the surface height of the workpiece as an initial object image coordinate conversion matrix of the workpiece, acquiring the image coordinate of the current dispensing point of the workpiece, and determining the dispensing point of the workpiece according to the height difference between the surface height of the workpiece and the selected discrete height layer. Obtaining a physical coordinate offset according to imaging parameters of the industrial camera; the initial position of the dispensing point is determined through sparse sampling, the offset of the dispensing point based on the initial position is determined based on the imaging geometrical relationship, the dispensing point can be rapidly and accurately positioned, and the efficiency and precision of dispensing operation are improved.

The invention provides a blanking system and a gantry crane, and relates to the technical field of engineering machinery. The blanking system is characterized in that a first conveying piece is arranged corresponding to a discharge port of the gantry crane; the second conveying assembly is movably arranged below the first conveying piece so as to convey materials output from the first conveying piece. The lifting parts are connected with the second conveying assembly, the lifting parts are used for corresponding to at least one of the multiple blanking points, and the lifting parts are used for ascending or descending when the blanking points are switched; and the second conveying assembly is configured to decelerate to stop when the blanking point is switched and the second conveying assembly moves from the current blanking point to the target blanking point to the deceleration area of the target blanking point, so that the lifting piece is correspondingly located above the target blanking point. According to the embodiment of the invention, through the second conveying assembly which is movably arranged, a large height difference is not needed, and material conveying to a plurality of material falling points is achieved.

The utility model particularly relates to a rapid track-on device for track equipment, which comprises a long plate device and a base device, and the base device comprises a base plate arranged at the bottom; the cylindrical supporting legs are vertically arranged on the base plate; the spherical shaft head is arranged at the upper end of the cylindrical supporting leg; the long plate device comprises a supporting plate arranged in the middle; the shaft sleeve is arranged at the bottom of the supporting plate and is provided with a hemispherical concave structure with a downward opening; the two long plates are arranged at the two ends of the supporting plate respectively, the long plates and the supporting plate are arranged in a perpendicular orthogonal relation, the thickness of the long plates is larger than that of the supporting plate, and a height difference is formed between the upper surfaces of the long plates and the upper surface of the supporting plate; and the hemispherical concave structure of the shaft sleeve is movably matched with the spherical shaft head, so that the long plate device is erected on the base device and is movably matched with the base device. The device has the advantages that the device is matched with the width of the steel rail, stable transfer of the device is ensured, and the stability and steering flexibility of the device are enhanced.

The application is a kind of fiber reinforced ceramic matrix composite surface three-dimensional roughness detection method and system, belongs to the technical field of material processing surface quality detection;Method is, first scanning fiber reinforced ceramic matrix composite processing surface to get the original processing surface three-dimensional model, and export point cloud data;Secondly, the coordinate transformation processing is carried out to the original three-dimensional model point cloud data, and the model is put right, the height difference of adjacent point cloud data is taken as the feature, the abnormal data points are screened and removed, the internal hole exposed on the processing surface is removed, the processing surface is reconstructed and the three-dimensional roughness S a Is calculated;Then determine the measurement area;Finally, according to the determined measurement area, the above scanning, hole removal, model reconstruction, S a The calculation work, namely the three-dimensional roughness of the processing surface is determined. The three-dimensional surface roughness value calculated by the application is no longer affected by the hole data, which ensures the effectiveness of the data.

The invention belongs to the field of urban renewal construction, and relates to a method for adjusting elevation and landing in place in building translation construction. In the process that a building returns and resets to a newly-built basement top plate, firstly, a temporary platform composed of a heightening steel beam and a heightening steel cushion block is laid on the newly-built basement top plate in advance so as to solve the height difference problem existing between the newly-built basement top plate and a translation rail. Secondly, triangular haunching plates are additionally arranged at the corners of the wall clamping beams for supporting the building; and a landing jack is directly arranged below the haunching plate. By means of the arrangement mode, the eccentric bending moment borne by the underpinning structure is greatly reduced, and absolute safety in the landing process is ensured. And finally, a set of repeatable standardized circulating steps is designed, and the effect that the existing building is always reliably supported in the landing process is achieved. The invention aims to overcome the defects in the prior art, and provides the building translation landing method which is safe to operate, accurate to control and capable of effectively coordinating the foundation height difference and optimizing the landing stress path.

The objective is to minimize the height difference between the first and second floor sections and the independent boards, even when using thick independent boards to connect the first and second floor sections, and to limit the range of movement of the independent boards relative to the first or second floor section. [Solution] The floor expansion joint comprises a first floor section provided in one building, a second floor section provided in the other building, separated from the first floor section and arranged along the same floor surface as the first floor section, an independent plate positioned between the first and second floor sections and arranged along the floor surface, a support section attached to the first or second floor section and supporting the independent plate from below so that the independent plate can move along the floor surface, and a limiting section provided on the lower surface of the independent plate and limiting the range of movement of the independent plate relative to the support section.

Hardware unit (10) for determining a non-linear ground surface, the hardware unit (10) comprising: at least one data input interface (1) via which the hardware unit (10) receives measurement points (M) from a 3D point-supplying sensor (20); a computing device (2) which maps the measurement points (M) into a two-dimensional grid (G) and determines a height difference for each grid cell (C) based on the measurement points (M) assigned to that grid cell (C), and classifies one of these grid cells (C) as invalid if the respective height difference exceeds a predetermined threshold; if the respective height difference of one of these grid cells (C) does not exceed the threshold and the respective height difference of at least two grid cells (C) directly adjacent to that grid cell (C) also does not exceed the threshold, classifies that grid cell (C) as a flat surface;wherein the computing device (2) performs a connected component analysis stepwise over the grid cells (C) classified as planar surfaces, separating planar surfaces belonging to obstacles from planar surfaces belonging to a ground surface and obtaining the nonlinear ground surface; a data output interface (3) that outputs the nonlinear ground surface.

This invention discloses a detection method, system, and medium based on line spectral confocalization. The method includes: determining the number of peaks; if the number of peaks is one, adjusting the light intensity value corresponding to the peak wavelength to be within the light intensity working range; if the number of peaks is not less than two, extracting the light intensity value corresponding to the peak wavelength, analyzing the peak morphology, and identifying the peak wavelength associated with each reflection region; analyzing the offset of the height of the specular reflection region, correcting the detection height of the specular reflection region to obtain the height difference between the reflection regions covered within the width of the line spot at any position on the scanning line; and adjusting the distance of the sensor relative to the surface of the object under test according to the height difference, so that there is one and only one valid peak in the spectral image at any position on the scanning line. This invention can accurately calculate the height difference between the specular reflection region and the diffuse reflection region covered within the width of the line spot, improving the signal-to-noise ratio of the spectral image and expanding the application scenarios.

The invention discloses a dynamic determination method for a large-span continuous steel beam incremental launching design line shape, which comprises the following steps of: designing a steel beam design line shape of a steel beam under an unstressed condition, and carrying out segmented incremental launching on the steel beam design line shape according to an incremental launching scheme in an actual incremental launching construction process of the steel beam; the method comprises the following steps: simulating the dynamic change condition of a steel beam design line shape under different preset pushing distances, obtaining the pushing design line shape of a steel beam under different pushing steps in a geometric line shape translation and rotation mode, and measuring the height difference between the pushing design line shape and a pier support according to the matching condition of the pushing design line shape and the pier support; therefore, the padding heights of the pier supports under different pushing steps can be obtained, accurate control over the pushing design line shape of the large-span continuous steel beam can be achieved, it is ensured that the beam body is always within the range allowed by the deviation of the pushing design line shape in pushing construction, the quality of finished bridges is effectively improved, and pushing construction safety is guaranteed.

The embodiment of the invention provides a vehicle suspension control method and device, a vehicle, a storage medium and a product. The method comprises the steps that in the coaxial height adjusting process of the air suspension, the sprung height difference value between air springs at the two ends of the same shaft is obtained; when the absolute value of the difference value is larger than the first height threshold value, the target air spring is determined, the height of the target air spring is adjusted until the absolute value of the difference value is smaller than the second height threshold value, and coaxial height adjustment is recovered, so that excessive response of the system to the small height difference is avoided, the adjustment efficiency is guaranteed, and the adjustment precision is improved. Height deviation caused by factors such as uneven load or uneven ground can be quickly offset, the adjusting precision is effectively improved, meanwhile, it can be ensured that the system automatically returns to a normal height adjusting process after reaching a reasonable balance state, optimization and unification of the balance precision and the adjusting efficiency are achieved, and the adjusting efficiency is improved. And the driving stability and the riding comfort of the vehicle are further obviously improved.

It is proposed a system (100) for determining the quality of a coating surface, the system comprising: a height data providing unit (101) configured to provide height data indicative of a height of the coating surface relative to a substrate; and a defect detection unit (102) configured to detect a defect in the surface by: a) determining height difference data for any candidate defect position, the height difference data for the candidate defect position indicating a difference between a height at the candidate defect position and a height at a plurality of reference positions, and b) comparing the height difference data with predetermined reference height difference data indicative of a defect. The system further comprises a quality determination unit (103) configured to determine a quality of the surface based on the detected defect. This allows for improved coating quality assessment based on efficiently and accurately detected defects.

The application provides an aircraft mass estimation method based on an intended height. Wind speed of each track point and the influence of wind on aircraft mass estimation are calculated by interpolation; the height difference between barometric height and intended height is compared with the threshold value to filter abnormal track points affecting mass estimation; a mass sequence is set, mass error under different masses is calculated, and the mass with the minimum error is taken as the estimated mass of the aircraft; a height layer sequence is set, the estimated mass of the aircraft under different height layers is calculated, data verification is performed, abnormal mass is removed, and the mean value of the normal mass is taken as the stable estimated mass of the aircraft. The application fully considers the influence of wind on aircraft mass estimation, filters track points according to intended height and height buffer time, removes abnormal track points affecting the mass result, and obtains more stable aircraft estimated mass through implementation of aircraft mass estimation at multiple height layers. The application has wide application prospects in the field of flight four-dimensional trajectory prediction.

The embodiment of the invention provides a control method and device for a roller of a coal mining machine, a storage medium and electronic equipment. The control method comprises the steps that the current running direction angle of the roller of the coal mining machine on the current working face is obtained, and the target adjusting angle of a cutting roller is obtained based on adjacent key cutting points; obtaining the height difference between the adjacent cutting key cutting points, determining the height difference threshold value of the cutting roller, and obtaining the cutting target adjustment angle of the cutting roller based on the relation between the height difference between the adjacent cutting key cutting points and the height difference threshold value of the cutting roller and the relation between the current operation direction angle of the roller and the cutting target adjustment angle of the cutting roller. And the height and the traction speed of the cutting roller are adjusted. According to the embodiment of the invention, a plurality of groups of scientific and quantitative height difference threshold value calculation models are established, and the difference value between the motion direction angle of the roller and the target direction angle is combined, so that an accurate and self-adaptive threshold value judgment standard is provided for the heightening, lowering or non-adjusting actions of the roller, and the precision and stability of roller heightening control are improved.

The application discloses a reverse making method of terraced rice picture and belongs to the field of straw picture, and comprises the following steps: S1, breeding color rice varieties with different color and plant height, and carrying out planting and management according to the characteristics of terraces; S2, designing a plane pattern by using PS and AI; S3, importing the plane pattern into CAD and adjusting the angle and perspective; S4, measuring the position and range of the rice field picture area field plot and the height difference of the field ridge; S5, discharging the whole pattern in the reverse direction of the field ridge by using the Ovi interactive map, and adjusting the position and angle of the field ridge in the picture to be optimal; and S6, placing the converted pattern in the rice field by using a positioning instrument and placing and planting. The terraces are curved, the field ridge is high, the field plot surface is small, and the rice field picture cannot be made like the basin or the plain, the application adopts a reverse terraced picture making technology, the technology overcomes the disorder and the broken feeling caused by the large height difference of the terraces, the small field plot and the large bending degree, and improves the overall viewing effect of the picture.

The utility model discloses an efficient lime soil compacting and integrating device, which belongs to the technical field of lime soil and comprises a bottom plate, one side of the top surface of the bottom plate is connected with a lifting component, one side of the lifting component is connected with two push handles, the top surface of the bottom plate is fixedly connected with a vertical plate, and one side of the vertical plate is connected with a compacting component; the push handle can be driven to ascend and descend by starting the lifting assembly, so that the height can be adjusted according to the height difference of constructors, the push handle can be matched with comfortable operation postures of different personnel, the working efficiency is improved, and the risk that the bodies of the constructors are injured is reduced; and the compaction depth can be adjusted according to the actual condition of the lime soil, the flexibility is improved, and the uniformity and stability of the compaction effect are facilitated.

The utility model relates to the field of conveyer belt especially relates to a conveyer belt. The conveyer belt is provided with a plurality of bosses, the style of boss is regular hexagon, the boss is evenly distributed and arranges horizontally and vertically, the boss forms with the conveyer belt surface and has the height difference, is provided with a plurality of grooves on the boss, the height of boss is 2 6mm, the width of boss is 2 15mm, the distance between two adjacent bosses is 2 6mm. Through the setting of boss, let the height difference caused by conveyer belt, and are provided with groove on the boss, set up like this increase the contact area of conveyer belt and silicon plate, increase the friction of conveyer belt and the silicon plate when moving, let the cleaning machine better movement on the silicon plate, when the cleaning machine carries out the water spraying operation, the boss and the groove on the boss avoid the reduction of conveyer belt friction through the water effect, cause the equipment to slide down.

The utility model discloses a height difference detection tool, which comprises a base and a base arranged on the base, a positioning seat is rotationally arranged on the base, the positioning seat is used for clamping a workpiece, and a rotating motor used for driving the positioning seat to rotate is arranged in the base; a supporting frame located on one side of the base is installed on the base, a longitudinal moving mechanism and a transverse moving mechanism installed on the longitudinal moving mechanism are installed on the supporting frame, and a height measuring sensor is installed on the transverse moving mechanism. The longitudinal moving mechanism and the transverse moving mechanism are matched to adjust the position of the height measuring sensor relative to the positioning seat; when the rotating motor drives the positioning seat to rotate and the transverse moving mechanism is used for adjusting the height measuring sensor to transversely move, the height values of at least four points on the workpiece are measured; the current situation that in the prior art, height data detection is carried out by manually selecting detection points, and the consistency of detection data is poor is solved.

The invention discloses a non-line-of-sight positioning method based on obstacle vectorization and distance measurement cross validation, which belongs to the technical field of wireless positioning and comprises the following steps: step 1, calculating a height difference according to the installation height of a base station and the preset height of a to-be-estimated label, and calculating a plane projection distance value according to the height difference and a TOF distance measurement value; 2, constructing a signal path according to a to-be-estimated label positioning result at the previous moment and the position of each base station, judging the penetration condition of the path by combining a vectorized obstacle map, and performing compensation and reliability screening on the plane projection distance based on the penetration condition to obtain a credible distance measurement value set; 3, solving and calculating a positioning residual error through multi-base-station combined positioning, and carrying out weighted fusion on a solving result according to the residual error to obtain an initial positioning result at the current moment; according to the invention, high-precision positioning can still be kept near the base station and in complex scenes such as multi-shielding and the like, and the application requirement of a shielding environment is met.

According to the three-drum forming mechanical drum capsule pressing ring and the capsule, the height difference between the upper portion of the capsule and the joint of the outer surface of the middle drum outer ring and the joint of the upper portion of the middle drum inner ring is reduced or eliminated, under the condition that the capsule is not stretched, the connecting section of the capsule smoothly surrounds the outer side end of the pressing ring, and the problem that rolling at the position is not compact in the forming and pressing process cannot be caused.

The invention discloses an information processing method and device in a game, electronic equipment and a readable storage medium, and the method comprises the steps: determining a relative direction between a first object and a second object of a game scene, the relative direction comprising a horizontal distance and a height difference; a first graphic identifier used for indicating the height difference is displayed in the graphic user interface, a first image parameter of the first graphic identifier is in positive correlation with the height difference, and the geometric center of the first graphic identifier is used for referring to the position of the first object; a second graphic identifier is displayed in the graphic user interface, and a second image parameter corresponding to the second graphic identifier is in positive correlation with the horizontal distance; the display position of the second graphic identifier is determined by the relative orientation between the first object and the second object. According to the method, the expression precision of the relative orientation information of the first object relative to the second object can be improved, invalid calculation of game equipment is reduced, and resources of a game server are saved.

The invention relates to the technical field of engineering surveying, and discloses a trackless fixed measuring device for a contact network, which comprises a measuring support and a measuring platform arranged on the measuring support, the measuring support comprises an upper supporting mechanism and a lower moving platform, the upper supporting mechanism and the lower moving platform are in butt joint up and down to form an I-shaped structure, and the measuring platform is mounted on the upper supporting mechanism. An adjusting assembly used for adjusting the horizontal height of the upper supporting mechanism and the measuring platform is installed in the middle of the top end of the lower moving platform. According to the invention, through the arrangement of the adjusting assembly, the height of the upper supporting mechanism and the height of the measuring platform can be accurately adjusted, so that the measuring platform reaches the required measuring height, the height of a track bed can be simulated, or the height of a track can be simulated through checking data and adjusting the height difference of the measuring platform, so that the measuring error is reduced; errors caused by accumulation of multiple times of measurement in traditional measurement are avoided, and the accuracy and efficiency of measurement are greatly improved.

The application discloses a drilling process of rigid-flex printed circuit board, comprising the following steps: board surface detection: detecting the board surface of the laminated rigid-flex printed circuit board, identifying and determining the uneven area of the board surface; filling treatment: filling the recessed part in the uneven area, and making the board surface tend to be flat after the filling material is solidified; setting the drilling alignment mark on the board surface after the filling treatment; drilling processing: drilling according to the drilling alignment mark. The recessed area is filled and treated, the height difference of the board surface is eliminated, the drill bit is uniformly stressed when contacting the board surface, the drill bit deflection is effectively prevented, and the hole deviation defects are reduced. The flat board surface makes the drill bit stably stressed when passing through different areas, and the hole wall roughness, burr or nail head phenomenon caused by the stress mutation is avoided.

The utility model relates to the technical field of surface grinding machines, in particular to a surface grinding machine for die steel finishing, which comprises a machine body, a workbench movably arranged at the upper end of the machine body, a vertical stand column fixedly mounted in the middle of the back of the machine body, a mounting seat movably arranged on the front of the stand column, and a grinding wheel mounted on the front of the mounting seat through a grinding motor. A baffle is arranged on the front face of the mounting base and located outside the polishing wheel. Scraping and sweeping mechanisms are arranged below the two sides of the baffle correspondingly. A filter box is fixedly installed outside the bottom end of the right side of the bed body, and a spraying mechanism is arranged between the filter box and the baffle. According to the utility model, the scraping plate is elastically matched with the spring for use, so that the surface of the polishing wheel and a workpiece polishing area are automatically and adaptively pressed by the scraping plate, the problems of vibration, noise and excessive abrasion generated by a traditional rigid scraping plate in a height difference transition area are effectively solved, the scraping stability is obviously improved, and the service life of the scraping plate is obviously prolonged.

The utility model discloses a lifting type loading and unloading platform which comprises a base and is characterized in that a second track is fixedly connected to the base, a second supporting arm is hinged to the base, one end of the second supporting arm is rotationally connected with a first roller, the first roller is connected into a first track in a rolling mode, and the first track is fixedly connected to the bottom of a lifting platform. The second support arm is rotatably connected with a first support arm, one end of the first support arm is rotatably connected with a second roller, the second roller is in rolling connection in the second track, one end of the first support arm is hinged to a second mounting seat, and the second mounting seat is fixedly connected to the bottom of the lifting platform; the lifting platform has the advantages that under the condition that the base is excavated, after the scissor-type lifting platform is contracted, the platform face is flush with the ground, occupied space can be reduced, the scissor-type lifting platform is integrated below the platform, goods can be conveniently lifted, the opening and closing angle of the loading and unloading platform above the platform can be adjusted according to the actual height difference, and rapid unloading is achieved.

The present application relates to the technical field of rotating mechanism, in particular to a high-speed conveying product deviation rectifying device, which comprises a conveying belt, a supporting frame, a position adjusting mechanism, a vision module and a controller, the conveying belt is a chain plate type conveying belt, the conveying belt comprises chain plate units and lifting units, each group of chain plate units comprises a material carrying plate, a lifting plate and a transmission group, the conveying belt of the conveying product is innovatively improved, the original rotating correction deviation rectifying mode of adsorbing products is adjusted to drive the lifting plate carrying the products to rotate, the deflection angle of the products is corrected, and then the angle correction of various shape products is applicable, and the interference problem of the front and rear products during correction is fully considered, the corrected products are lifted, a height difference is formed between the corrected products and the front and rear products, and the accuracy of the deflection angle correction of the products is ensured.

The application discloses a material guiding structure for egg roll production, which comprises a cutting roll machine, a conveyor and three-stage material guiding parts therebetween. The first and second material guiding parts are arranged in transverse side-by-side and height difference, and the third material guiding part is assisted by a vibrating motor for discharging. The inclined angle (>=60 DEG and >=35 DEG) of the material guiding part and the vibration parameters (30-50 Hz, 0.5-2 mm) synergistically act, realizing non-stuck conveying of the egg roll. The application is suitable for an automatic production line and has high efficiency and hygiene.

A kind of control method of double push chain device lifting platform synchronous operation, belong to push chain lifting platform technical field, including the following steps: (1) the position of the push chain head of two push chain devices is detected;(2) the speed of two push chains is calculated;(3) the height difference of the push chain head of two push chains is calculated;(4) the push force of the push chain head of two push chains is read;(5) the push force difference of the push chain head of two push chains is calculated;(6) according to fuzzy rule base, judge the unbalance load condition, and calculate compensation frequency and compensation time.The present application solves the synchronization problem and unbalance load problem in the operation of two push chain device lifting platforms, improves the load capacity of the lifting platform, improves the stability of the lifting platform, and prolongs the service life of the lifting platform.

The application discloses a floor frame assembly and a vehicle. The floor frame assembly comprises two floor longitudinal beams, a first cross beam, a second cross beam and a reinforcing longitudinal beam. The two floor longitudinal beams extend along a first direction and are spaced apart along a second direction. The first cross beam and the second cross beam both extend along the second direction and are spaced apart along the first direction. The two ends of the first cross beam and the second cross beam are connected to one floor longitudinal beam respectively. The first cross beam and the second cross beam have a height difference along a third direction. The reinforcing longitudinal beam extends along the first direction and is connected to the first cross beam and the second cross beam. The connection between the reinforcing longitudinal beam and the first cross beam and / or the second cross beam is curved. Thus, the first cross beam has a height difference with the second cross beam along the third direction. The connection between the reinforcing longitudinal beam and the first cross beam and / or the second cross beam is curved, so that a collapse area is formed between the reinforcing longitudinal beam and the first cross beam and the second cross beam, and the impact performance of the floor frame assembly is improved.