663results about "Vehicle shock testing" patented technology

A system determines the position of a seatbelt in a crash test using a pressure sensing garment affixed to a crash test dummy. The pressure sensing garment is a surface or material configured to measure pressure applied to the crash test dummy during a crash test. The pressure sensing garment measures pressure applied to the crash test dummy using a capacitive sensor grid. The system determines the position of the seatbelt based on the pressure data from the pressure sensing garment and may apply various algorithms to automatically determine the angle and centerline of the seatbelt based on the pressure data.

The invention provides a large-angle zero-gravity seat damage risk assessment method, and the method comprises the following steps: S1, collecting the pressure and comfort data of a dummy at different angles and under different supporting point configurations through an experiment, and building a dummy simulation model suitable for a large-angle zero-gravity seat; s2, on the basis of the dummy simulation model of the large-angle zero-gravity seat, vehicle collision and impact tests are added, acceleration and impact force data under different seat adjusting angles are obtained, a large-angle zero-gravity seat passenger injury prediction simulation model is established, and therefore a injury prediction value is obtained; and S3, calculating a damage risk score according to the damage predicted value.

The invention relates to automobile part testing, and relates to the technical field of an automobile door limiter durability testing device, and the device comprises an adjusting mechanism which comprises a first motor, a first rotating disc, a first sliding groove, a threaded rod, a first piston rod, a first sliding block, a second rotating disc, a second sliding groove and a sliding rod. Through cooperation of structures such as the second rotating disc and the arc-shaped plate, simulation testing of the vehicle door limiter is facilitated, the first motor is started to enable the second rotating disc to rotate continuously through transmission, the arc-shaped plate drives the cantilever to swing in a reciprocating mode, and the state of the limiter during door opening and closing is simulated; the durability cycle test, the motion precision verification and the instantaneous impact load evaluation of the vehicle door limiter are realized, the test automation degree and the simulation precision are improved, the negative pressure generates variable damping force, simulates air resistance, spring pre-tightening force and door closing impact, the durability of the limiter under real stress is tested, and the test effect of the device is improved.

The invention discloses a method for reducing the loss of an automatic driving vehicle collision test device, and the method comprises the following steps: obtaining preset test vehicle parameters which comprise the maximum deceleration amax of an automatic emergency braking system, the test vehicle speed vtest and the communication system delay time t delay; when an emergency braking system of the test vehicle is triggered, emergency avoidance triggering time t triggering is calculated through a formula t triggering = v test / amax + t delay; after position data of the test vehicle and the background target object are collected in real time, the real-time relative distance D is calculated, and the collision time t collision is calculated through a formula t collision = D / v test; and when t collision is less than or equal to t trigger, driving the background target object to move away from the collision direction through the mechanical execution mechanism. Before collision, the target object is actively driven to be away from the collision direction, and structural damage caused by direct collision can be avoided.

An overrunable test vehicle includes a chassis, a wheel operatively attached to the chassis, and a suspension system. The suspension system includes a pivot arm mounted to the chassis about a pivot axis, and the wheel rotatably mounted to the pivot arm. The suspension system also includes a first biasing element having a first spring rate. The first biasing element is partially supported by the chassis and arranged to engage the pivot arm to provide a first suspension force in a first direction about the pivot axis. The suspension system further includes a second biasing element having a second spring rate, different than the first spring rate. The second biasing element is at least partially supported by the chassis and arranged to engage the pivot arm to provide a second suspension force in a second direction about the pivot axis, opposite the first direction.

The invention discloses a method for placing a dummy in a large-inclination-angle lying posture. The method comprises the steps that S1, a backrest angle coordinate, a cushion angle coordinate and an H-point coordinate mean value of a test seat at a target position are obtained; s2, keeping the included angle between the backrest and the cushion unchanged, rotating the test seat around the first mark point until the cushion angle of the test seat reaches a preset angle, and defining the posture as a cushion angle standard position posture; s3, acquiring a backrest angle and a second mark point coordinate under a cushion angle standard position posture, and calculating a cushion angle standard position posture reference pelvic angle; s4, calculating a corner difference of a cushion angle standard position posture and a target position reference pelvic angle; s5, keeping the included angle between the backrest and the cushion unchanged, and rotating the test seat around the first mark point until the second mark point, the backrest angle and the cushion angle return to the target position; s6, calculating a dummy target pelvic angle; and S7, placing the dummy on the test seat. The problems that errors exist in automobile safety evaluation data of the dummies in the large-dip-angle lying posture, and evaluation is not accurate are solved.

The invention discloses a collision load reconstruction method and system, relates to the technical field of load identification, and aims to solve the problem that the prediction result of the current load reconstruction method is not accurate enough, and the method comprises the following steps: S1, collecting an excitation signal and a response signal when a vehicle body is laterally impacted, performing multi-mode decomposition on the excitation signal and the response signal by using a variational mode decomposition method; s2, according to Spearman correlation, selecting a modal component with the maximum correlation as an optimal modal signal base to perform noise adding processing; s3, establishing a noise feature library, generating composite noise conforming to actual working conditions, and expanding a training data set on the premise of retaining effective features; s4, constructing a prediction model of deep learning, performing model training by using a dual-loss function, and generating a reconstructed load signal by using the prediction model, and further comprising a corresponding system; the method and the system are suitable for vehicle body lateral collision load reconstruction of the sparse sensor array, and the precision of load reconstruction is high.

The invention relates to the technical field of collision safety, in particular to a THUMS dummy adjusting method based on a BOUNDARY command. Comprising the steps that simulation software is installed, a THUMS human body model is obtained, and meanwhile an original model file is backed up; entering a simulation environment, importing a THUMS human body model, and ensuring that the initial posture of the adjusted model meets an expected collision scene or experiment requirement; determining a target posture of the THUMS human body model, including analyzing a key part of the target posture and determining the position of the key part, and editing the model to set the target posture; dummy simulation parameters are set, an Orient command is used for moving a THUMS model part to a target position, a BOUNDARY command is used for defining a target posture of a THUMS human body model and inputting a recovery curve, and meanwhile a simulation step length and a time step length are set; attitude adjustment simulation is executed, and attitude changes in the simulation process are observed; and replacing the adjusted THUMS model node information with the node information in the original model. According to the technical scheme, the efficiency and accuracy of a simulation experiment can be improved.

The invention relates to the technical field of biomechanical detection and automobile safety evaluation, and discloses an automobile collision dummy abdomen safety test device and method. The testing device comprises a human body feature modeling module which is used for establishing a target population abdomen parameterized model based on statistical analysis, determining a key size design domain covering target population percentile and constructing a target population metrology database; the abdominal mechanical property simulation module is used for obtaining a human tissue relative density distribution function based on the hyperelastic constitutive model, taking the density distribution function as an input parameter for manufacturing a gradient honeycomb structure and simulating human abdominal mechanical properties through relative density gradient distribution in the thickness direction; the multi-mode sensor integration module adopts a distributed intelligent sensing network architecture and is composed of a sensing layer, a transmission layer and a processing layer. By integrating pressure, deformation, acceleration and tissue stress sensors and combining a real-time feedback algorithm, collision parameters are dynamically optimized, and the test precision and the biological fidelity are improved.

The invention discloses a vehicle collision detection method based on a multi-modal fusion visual terminal, and the method comprises the steps: S1, analyzing a track data packet uploaded by a device end in real time, and obtaining vehicle motion parameters of a predetermined time length and a predetermined dimension; s2, collecting audio and video data of a preset time window of the trigger track data packet, and decoding audio and video information of a set time length; s3, performing data preprocessing on each analyzed modal parameter, constructing a feature set of a single-modal collision detection dimension, and performing feature screening; s4, fusing the sensor gyroscope and the audio and video multi-modal features; and S5, constructing a multi-modal subdivision scene based on the multi-modal features, and constructing a push rule of vehicle collision detection by adopting a decision tree algorithm. According to the invention, modeling is carried out by fusing the three-axis acceleration and audio and video data acquired by the sensor, so that the collaborative and complementary detection of vehicle collision based on multi-modal data is realized.

The invention discloses an impact resistance test device and method for an energy-absorbing anti-collision structural member, and relates to the technical field of automobile anti-collision members. Comprising a support, a drop hammer mechanism arranged on the support and capable of sliding in the Z direction, a clamp arranged at the bottom of the support and used for clamping a test piece, and a force value sensor arranged below the clamp and used for collecting impact force borne by the test piece. The first displacement detection component is arranged above the test piece and can be used for measuring the concave depth of the upper surface of the test piece, the second displacement detection component is arranged between the test piece and the force value sensor and is used for measuring the convex height of the lower surface of the test piece, and the first displacement detection component can move in the X direction and the Y direction. The first displacement detection component can measure the concave depth of the upper surface of the sample in a multi-point mode, the second displacement detection component can measure the protruding height of the lower surface of the sample, it is ensured that the initial error can be accurately deducted from the displacement variation after impact, and the measurement precision of the upper and lower surface deformation of the sample is improved.

The invention discloses a deceleration sliding table pre-braking simulation collision test system and method, and the system comprises a sliding table assembly and a track which are located above the track and can move along the laying direction of the track; the traction assembly and the brake assembly are located on the two opposite sides of the sliding table assembly respectively, and the cable is arranged in the track, connected with the traction assembly and the detachable sliding table assembly respectively and connected with the brake assembly in a clamped mode; the traction assembly is used for pulling the cable to move towards the traction assembly, so that the sliding table assembly moves towards the traction assembly; the brake assembly is used for extruding the inner side wall of the track, so that the sliding table assembly is braked to decelerate under the reverse force of the moving direction of the traction assembly; and the collision waveform reproducing device is fixed to the side, close to the traction assembly, of the rail, so that the sliding table assembly can collide with the collision waveform reproducing device when moving in the direction close to the traction assembly. And a scene in which collision still occurs after emergency braking of a real vehicle is simulated, so that the test is more real.

The present disclosure discloses a method and system for evaluating collision testing of a bottom of a battery pack and a device. The method includes: constructing a three-dimensional battery pack collision simulation model according to material parameters and size parameters of each component at a bottom of a battery pack to be tested; performing collision testing on the battery pack to be tested based on a benchmarking working condition to obtain a measured collision posture; calibrating the three-dimensional battery pack collision simulation model based on the measured collision posture to obtain an optimized three-dimensional battery pack collision simulation model; setting a plurality of standby working conditions, performing collision simulation under any standby working condition by using the optimized three-dimensional battery pack collision simulation model, and recording a simulation result; determining collision safety performance of the battery pack to be tested based on simulation results corresponding to different standby working conditions.

A method for predicting dummy head injury during an automobile collision includes: enabling a dummy head to collide with a rigid flat plate; obtaining a first data set in a collision process; calculating the maximum contact force of the dummy head and the rigid flat plate in the collision process according to the first data set; dividing a duration of the collision process into a plurality of time intervals; and calculating an injury value of the dummy head in each time interval according to the maximum contact force, and selecting the maximum injury value as a target injury value. The method provided by the present application may realize prediction for the head injury under different scene working conditions, and has the advantages of being simple in test flow, and high in prediction precision.

The invention relates to the technical field of bicycles, in particular to a bicycle riding stress parameter acquisition device which comprises a bicycle model body, pedal sensors installed on pedals, handlebar sensors installed on handlebars and a saddle sensor installed on a saddle. The lower end of the connecting block is fixedly connected with a horizontally arranged detection plate; the angle of the adjusting plate is adjusted through the angle adjusting structure, so that the angle of the adjusting plate is adjusted to a proper position, and the gradient of a road surface impacted by a bumpy bicycle is simulated; after the angle adjustment is completed, a rider sits on a saddle on the bicycle model main body to simulate a normal state during riding; and when the stress data of large-amplitude bumping of the bicycle needs to be collected, the electric pin rod is closed, so that the detection plate falls down and collides with the adjusting plate, and the stress data of the bicycle can be conveniently collected.

The invention relates to the technical field of automobile testing, in particular to an automobile door lock safety performance testing device for an automobile crash test, which comprises a bottom frame and a sliding block, and further comprises a supporting column, an automobile door mounting assembly, a limiting frame, an air bag assembly, an impact assembly, an electromagnetic accelerator and an inductive switch, the vehicle door mounting assemblies are slidably mounted on the inner sides of the supporting columns, the two limiting frames are symmetrically mounted on the two sides of the bottom frame, the air bag assemblies are mounted on the surfaces of the limiting frames, and the ends of the air bag assemblies extend to the two vehicle door mounting assemblies close to the sides of the limiting frames correspondingly. According to the invention, through a mode of correspondingly adjusting the pressure intensity of the corresponding position in the air bag assembly in the automobile collision test process, the problems that the parts of the test device for installing the hinge and the door knob buckle are easy to deform due to impact and the subsequent test operation is influenced are solved; and the problem that single collision data cannot be accurately acquired due to secondary collision between the impact structure and the vehicle door after collision is solved.

The invention relates to the technical field of collision tests, in particular to a fixed rolling collision test bed which comprises a left supporting rack and a right supporting rack, a collision table top is arranged between the left supporting rack and the right supporting rack, a lifting air cylinder is arranged at the bottom of the collision table top, the left supporting rack and the right supporting rack are the same in structure, and guide transverse rods are arranged on the two supporting racks. Sliding assemblies are in sliding fit with the guide transverse rods, driven transmission mechanisms are arranged on the supporting racks respectively, the driven transmission mechanisms are in transmission connection with the sliding assemblies and drive the sliding assemblies to slide in the front-back direction of the guide transverse rods, the two driven transmission mechanisms are in transmission connection with driving transmission mechanisms respectively, and a rotating shaft is arranged between the two sliding assemblies. The rotating shaft is used for installing a test vehicle, and the end of the rotating shaft is connected with a rotating motor. The problems that the vertical speed of an existing rolling collision test is difficult to control and the repeatability is low are solved.

The invention relates to the technical field of vehicle tests, in particular to a material rigidity obtaining method and device for MPDB honeycomb barrier development. The method comprises the following steps: in a simulation environment, comparing 50% bias force wall collision mechanical response at different speeds with 50% bias vehicle-to-vehicle collision mechanical response at 50km / h to obtain a 50% bias force wall test speed matched with the mechanical response; in a real test environment, a test vehicle is controlled to impact the front face of the force wall at the 50% bias force wall test speed, and impact force-time data output by all force measuring units on the force wall are obtained; obtaining stress-displacement data according to the data processing method; and guiding the material development of the front 50% overlapping movement progressive deformation barrier according to the stress-displacement data. The method can guide the material development of the MPDB honeycomb barrier.

The invention provides an automobile collision human body biomechanical response channel construction method and system. The method specifically comprises the following steps: acquiring test data; aligning the biomechanical time domain signal in the signal loading stage to obtain an alignment signal; performing principal component decomposition on the alignment signal, and extracting a feature value of the alignment signal; based on the human body parameters corresponding to the alignment signals, constructing a prediction model between the feature values of the alignment signals and the human body parameters; inputting the target human body parameter into a prediction model, and predicting to obtain a biomechanical response channel parameter corresponding to the target human body parameter; the biomechanical time domain signals in the signal loading stage are aligned to improve the consistency of the signals, and the aligned signals are subjected to principal component decomposition to reduce the calculation amount. And the prediction model between the feature value of the alignment signal and the human body parameter is constructed to realize automatic prediction to obtain the biomechanical response channel corresponding to the target human body parameter, so that the prediction efficiency is improved on the basis of ensuring the prediction accuracy.

The invention provides an automobile protection performance testing device, which relates to the technical field of automobile collision protection testing and comprises a bearing support, a bearing support column, a bearing platform, a bearing side seat, a testing support, a limiting bearing column, a pushing device and a testing bearing seat. Positioning side columns are fixedly installed at the two ends of one side of the bearing support. The bearing supporting column is installed on the side face of the bearing support. The bearing platform is arranged at the tops of the guide supporting columns; the bearing side seats are mounted on the side surfaces of the bearing supporting columns; the test support is arranged at the top of the bearing pillar; the limiting carrying column is arranged on the inner side of the test support; the pushing device is arranged on the side surface of the testing support; the test carrying seat is arranged between the bearing side plates; the sliding support is matched with the lifting support so that the pushing device can move and be lifted, and the bearing bottom wheels rotationally support driving wheels of the pushing device. The problems that most automobile protection performance testing devices do not have the protection function, and continuous impact force can be generated after driving impact of the testing devices are solved.

The present invention provides a small active drive platform for loading dummy targets, including a platform body for providing support and installation parts; a power module, arranged below the platform body, for driving the platform body to move; and an electrical module, installed in the platform body, for controlling corresponding units to make feedback according to different control signals. Compared with the related art, the small active drive platform for loading dummy targets provided by the present invention has ultra-thin size, is flexible and intelligent, has high test accuracy, and can meet the auxiliary test conditions of multi-target collaboration.

A system generates realistic vibrations in a vehicle body. The system includes the vehicle, a power supply, a processor circuit including a processor and memory, and a user interface configured to select a frequency and amplitude for a sound or vibration. The system also includes at least one amplifier in communication with the user interface and configured to: receive power from the power supply and output an electrical signal at the selected frequency and amplitude. The system also includes at least one transducer configured to: attach to the vehicle, receive the alternating current electrical signal at the selected frequency and amplitude, and generate a vibration at the selected frequency and amplitude. When the transducer is attached to the vehicle, the vibration generated by the transducer is transmitted into components of the vehicle.

The invention relates to a verification method and device for the explosion safety margin of an automobile safety airbag and a storage medium, and the method comprises the steps: setting the braking force of a braking mechanism of an acceleration type trolley according to a weighted acceleration curve, and simulating the forward impact when an automobile is collided according to the braking force of the braking mechanism; monitoring an explosion signal of a safety air bag controller installed on the acceleration type trolley; and comparing the difference between the air bag ignition time actually collected by the current clamp in different weighted states and the target air bag ignition time, and determining the safety margin of the safety air bag controller meeting the preset maximum calibration condition according to the actual comparison data. According to the embodiment of the invention, the ACU can be installed on the acceleration type trolley to simulate the whole process of vehicle collision, and the simulation of the acceleration of the whole vehicle in a low-speed collision accident of the vehicle is realized, so that the airbag unfolding condition and the safety margin of the ACU in an actual accident are verified, the vehicle collision test requirements are reduced, and the vehicle collision test number is reduced.

The invention relates to the technical field of collision tests, in particular to a test bed for an automobile rolling collision test, which comprises a base, a sliding table and a rack, the sliding table is in sliding fit with the base, the rack is arranged on the base, the rack comprises a left stand column and a right stand column which are symmetrically arranged, and rotating arms are respectively positioned on two sides of the sliding table and arranged between the left stand column and the right stand column; the left stand column and the right stand column are in sliding fit with sliding block bases respectively, the two ends of the rotating arm are supported on the sliding block bases, rotating motors are arranged on the sliding block bases and are in transmission connection with the rotating arm, the upper ends of the left stand column and the right stand column are connected through a motor installation frame, and a lifting motor is arranged on the motor installation frame and is in transmission connection with a transmission shaft. The transmission shaft is connected with the sliding block base of the left stand column through a first chain transmission mechanism, and the transmission shaft is connected with the sliding block base of the right stand column through a second chain transmission mechanism. The problems of poor repeatability and poor test result reliability caused by difficulty in controlling the vertical speed of the existing rolling collision test are solved.

The invention discloses an AI modeling-based automobile bumper parameter determination method and system, relates to the technical field of AI modeling, is used for solving the problem of deviation in automobile bumper parameter determination, and selects a distance between an impact point and an automobile door according to an impact angle to calculate a side angle impact score by calling an AI modeling bumper parameter data packet and a confirmation mechanism. A simulated impact experiment is conducted, a diagonal deformation difference value and an extrusion force difference value of the front bumper and the rear bumper are obtained to generate a diagonal response score, a collision angle collision coefficient is obtained in combination with a side angle collision score and marked as side face collision or front face collision, a side face collision label is called, the number is counted, and whether a parameter supplement rule is introduced or not is judged; the maximum deformation and the residual deformation are collected to calculate the deformation recovery rate, a fatigue supplement coefficient is obtained by combining the number of the side impact labels, whether the deformation recovery rate is introduced or not is judged according to the fatigue supplement coefficient, a parameter confirmation mechanism is imported after screening, and intelligent distinguishing of impact modes at different impact angles is achieved.

The invention provides a bumper assembly low-speed collision test system and method, and the system comprises a mobile barrier trolley, a universal rapid installation clamp, a multi-sensor integrated measurement module, and a data collection and processing system, and can adapt to different bumper assemblies to be tested through the universal rapid installation clamp, simulates the real collision process, and improves the test precision. In the process that the traction system drives the movable barrier trolley to move along the track to conduct the collision test, the multi-sensor integrated measurement module can collect collision data and draw a data curve, and the accuracy of the collision test result is improved. And then the data acquisition and processing system scores the maintenance economy, the energy absorption efficiency, the passenger protectiveness and the structural integrity according to the collision data and the data curve, grades the collision test result according to the scoring result, and finally can output a depth test report containing rating and improvement suggestions. The method is used for supporting and improving the design and optimization capability of the bumper assembly.

The invention belongs to the technical field of bumper detection, and particularly relates to a vehicle bumper detection tool and method, and the vehicle bumper detection tool comprises a detection table and a multi-angle simulation assembly. The multi-angle simulation assembly comprises a sliding seat; the upper side of the sliding seat is fixedly connected with a guide box through a supporting column; a movable seat is slidably connected into the guide box; the interior of the guide box is rotationally connected with a driving rod; the driving rod penetrates through the interior of the movable seat and is connected with the movable seat through a screw-nut pair; the surface of the movable seat is fixedly connected with a connecting rod; the end part of the connecting rod is fixedly connected with a contact piece; and a load sensor is arranged between the connecting rod and the movable seat. By adjusting the position of the multi-angle simulation assembly, the direction of the load borne by the bumper in the impact test is changed, so that the front face and the side face of the bumper can be subjected to loading test at all angles, the collision situation of a vehicle in the actual driving process is fully simulated, and the anti-collision performance of the bumper is truly reflected.

The invention relates to an automatic driving braking test method and device based on bionic vision and tactile fusion, and the method comprises the steps: obtaining environment information in a current test scene based on visual equipment; simulating a collision process of a current vehicle and an obstacle, and acquiring tactile information corresponding to the collision process based on force feedback equipment; based on the original visual features corresponding to the environment information and the original tactile features corresponding to the tactile information, performing multi-modal feature fusion processing to obtain visual and tactile combined features; predicting vehicle body response information of the current vehicle corresponding to the candidate braking strategy based on the visual and tactile joint features, and obtaining an optimal braking strategy corresponding to the candidate braking strategy based on the vehicle body response information; and generating a braking control signal based on the optimal braking strategy. According to the invention, comprehensive and accurate evaluation of the braking performance of the automatic driving system under the emergency condition is realized.

The invention relates to the technical field of battery bottom scraping test, in particular to a power battery bottom scraping test device and test method. A vehicle body is slidably mounted at the upper end of the test box; a through groove is formed in the upper end of the vehicle body; a power battery is fixedly mounted in the through groove; through the arrangement of the three groups of driving guide rails, when the vehicle body drives the power battery to move forwards, forwards turn left and forwards turn right on the three groups of driving guide rails, the bottom scraping rods located below the three groups of driving guide rails can scrape or impact the power battery in different driving directions; therefore, the scratch or impact effect of the power battery in the driving directions of advancing, forward turning and the like is simulated, the deviation of a test result is reduced, potential weak links of the power battery in actual driving are detected conveniently, and the accuracy of overall evaluation of the safety performance of the power battery is further improved. And the practical application effect of the method is effectively improved.

A battery pack bottom scraping test device disclosed by the present invention comprises a base, a platform, a bottom supporting assembly and a driving assembly, the platform is arranged above the base, the bottom supporting assembly is arranged on the top side of the platform, the bottom supporting assembly comprises a bottom supporting head, the bottom supporting head can be ejected upwards, and the driving assembly is arranged on the bottom supporting head. The bottom supporting head is arranged on the base and used for simulating an obstacle and acting on a battery pack, the driving assembly is arranged between the base and the platform, and the driving assembly is used for driving the platform to move relative to the base so as to achieve displacement adjustment of the bottom supporting head in the height direction, the width direction and the length direction of the platform. The battery pack bottom scraping test device has high operation flexibility, and full-dimension bottom scraping test verification of different positions, different heights and the like can be achieved.