49 results about "Chassis dynamometer" patented technology

A steering model controller in a chassis dynamometer of the disclosure executes a turning determination process of determining whether a driving state of a vehicle is a steering / turning state or a driving straight state based on comparison results between a turning radius for determination and turning radii for comparison calculated based on left steering angle information and right steering angle information. Then, the steering model controller executes a turning control process as a roller control process to be executed in determining that the vehicle is in the steering / turning state. The turning control process is a process of outputting, to a roller driving mechanism, four roller driving commands at which four rollers adapt to the steering / turning state of the vehicle and are rotationally driven.

The invention relates to the technical field of automobile testing, in particular to a method for testing long braking attenuation of an automobile by using an environmental wind tunnel. Comprising the following steps: installing a chassis dynamometer in an environment wind tunnel, and installing data acquisition equipment on a tested vehicle; setting a tested vehicle in the environment wind tunnel, setting environment parameters in the environment wind tunnel as target working condition parameters, and setting a chassis dynamometer as downhill working condition parameters; after the environment state and the dynamometer are stable, the vehicle is controlled to run continuously within the speed precision range required by the speed spectrum through continuous braking, or when the vehicle is controlled to run continuously to a set emergency deceleration point, emergency braking operation is executed, and experimental data are collected synchronously until a preset test ending condition is met; and after filtering and noise reduction, abnormal value elimination and altitude-slope conversion processing are carried out on the acquired experimental data, the performance attenuation law and the emergency efficiency of the braking system are analyzed. According to the technical scheme, the test precision of the long-braking attenuation of the automobile can be improved, and the test cost is reduced.

The objective of the present invention is to provide a chassis dynamometer that suppresses resonance and vibration phenomena, without changing the mechanical structure of the chassis dynamometer. An inverter (4) of a chassis dynamometer (1) according to the present disclosure includes: a notch filter (40) that attenuates a signal in an attenuation target frequency band including the mechanical natural frequency of the chassis dynamometer 1, from a rotation command signal (S3), and outputs a rotation command signal (S3A); a secondary HPF (45) that passes signals in a high-frequency band including the mechanical natural frequency, among an encode signal (S7), to obtain an encode signal (S7A); a subtractor (47B) that subtracts the encode signal (S7A) from the rotation command signal (S3A) to obtain a rotation command signal (S3B); and a roller drive control unit (RC) that generates a drive control signal (S4) on the basis of the rotation command signal (S3B).

The invention relates to a chassis dynamometer shafting system with a shielding function for testing a whole three-axle heavy vehicle, and belongs to the technical field of chassis dynamometers. According to the chassis dynamometer shafting system, the two sections of rails are arranged on the underframe, and the three shaft assemblies are matched on the rails to form the chassis dynamometer shafting system suitable for testing the whole three-shaft heavy vehicle, so that the problem that an existing dynamometer cannot meet the requirements of the three-shaft heavy commercial vehicle and the variable wheelbase is solved. The system comprises three test shafts corresponding to six hubs of a three-shaft vehicle. According to the design, independent road load simulation is provided for each wheel, and it is ensured that all axles, especially third axles, can be tested under the real road load. Besides, the second axle and the third axle are provided with an adjustable axle distance mechanism, relative movement can be achieved through a push rod assembly, the axle distance adjusting range covers 1300-1600 mm, and the axle distance requirement of an existing three-axle heavy truck on the market is met.

The invention relates to the technical field of vehicle testing, in particular to a whole vehicle braking wear particulate matter testing system under laboratory conditions. The system comprises a chassis dynamometer, a vehicle head fan, a tested vehicle, a connection system, a collection system, a test system and a verification system. The chassis dynamometer is used for providing various resistances in the normal driving process of the automobile; the automobile head fan provides cooling airflow in the automobile driving process; in the running process of the tested vehicle, braking wear particles are generated by a braking system; the connecting system connects the tested vehicle with the collecting system; the collecting system is used for capturing brake wear particles generated by the brake assembly; the test system is used for acquiring emission characteristics of brake wear particles of the tested vehicle; and the verification system is used for obtaining the test efficiency of the brake wear particles in the test scheme and correcting a final result.

The invention provides a pure electric drive new energy automobile chassis dynamometer, which relates to the technical field of new energy automobiles, and comprises a fixed seat, a dynamometer device I, a placement walking device, a dynamometer device II and an adjustable mechanism, the device has the advantages of being reasonable and simple in structure, low in production cost, convenient to install and complete in function, the distance between the two power measuring devices can be adjusted through the displacement mechanism, the test requirements of new energy automobiles with different axle distances can be met, meanwhile, the stability of the power measuring devices in the moving process can be ensured through cooperation of the sliding bases and the supporting strip bodies, and the test efficiency is improved. The influence of position offset after adjustment on the test precision is avoided; the auxiliary walking device is arranged, the motor drives the transmission structure to drive the auxiliary walking plate to move transversely, temporary walking support can be provided for the vehicle, the vehicle can smoothly run to the designated position of the dynamometer conveniently, external hoisting equipment does not need to be additionally used, the vehicle loading operation process is simplified, and the test preparation efficiency is improved.

The invention relates to an auxiliary tool for a chassis dynamometer. The chassis dynamometer auxiliary tool comprises a base; the connecting part comprises a rotating part and a supporting part, the rotating part is rotatably arranged on the supporting part, the rotating part is used for being detachably connected with a transmission shaft of a vehicle, the transmission shaft is used for being connected with a tire, and the transmission shaft can drive the rotating part to rotate relative to the supporting part when rotating; and the height adjusting mechanism is arranged on the base, the supporting piece is connected with the height adjusting mechanism, and the height adjusting mechanism is used for adjusting the height of the connecting part. According to the scheme provided by the invention, the multi-axle vehicle can be tested on a mainstream two-axle chassis dynamometer.

A hub directly driven by a motor and used for a heavy-duty chassis dynamometer includes a hub body, wherein a mounting surface is arranged on an inner circumference of the hub body and is disposed around a transmission shaft coaxial with the hub body, the transmission shaft is sleeved with a driving assembly, and bearing assemblies are disposed on two sides of the driving assembly in an axial direction respectively; a plurality of axial mounting plates are disposed on an outer circumference of the driving assembly, and tension sensor assemblies are connected to the axial mounting plates located outside the hub body and are mounted on the support frame; and an end, away from the mounting surface, of the transmission shaft, is sleeved with an end flange plate, and a plurality of brake assemblies are disposed on the end flange plate and are mounted on the support frame.

The utility model relates to the technical field of automobile detection, in particular to a new energy chassis dynamometer working face safety detection device which comprises a bottom plate, a fixed plate and a sliding plate are arranged on the bottom plate, the fixed plate is fixedly connected with the bottom plate, and the sliding plate is in sliding fit with the bottom plate in the length direction of an automobile. The bottom plate is further provided with a first driving mechanism used for driving the sliding plate to act. A front vehicle-feeding vehicle-guiding plate is arranged on the bottom plate and located above the fixed plate, a rear vehicle-discharging vehicle-guiding plate is arranged on the sliding plate, the front vehicle-feeding vehicle-guiding plate and the rear vehicle-discharging vehicle-guiding plate are located on the same horizontal plane, and supporting rods are arranged on the opposite side faces between the front vehicle-feeding vehicle-guiding plate and the rear vehicle-discharging vehicle-guiding plate in a crossed mode; telescopic stand columns are arranged at the two corners of the front side of the front bicycle guiding plate and the two corners of the rear side of the rear bicycle guiding plate correspondingly, and correlation switches are arranged on the opposite side faces of the adjacent telescopic stand columns. Through the correlation switches arranged at different heights, an electronic fence function is formed, and an alarm can be given out in time for the mistaken entering situation in the detection process.

This disclosure aims to provide a chassis dynamometer that generates a steering wheel restoring force when the vehicle is in a steering turn state to perform a vehicle driving test. The turning model controller (21) in the chassis dynamometer (1) of this disclosure performs a turning determination process and a turning command angle calculation process based on left turning information (S1L) and right steering angle information (S1R). The turning determination process is a process that determines whether the vehicle (60) is in a steering turn state or a straight-ahead state. The turning command angle calculation process is a process that calculates the left turning command angle (θlv) and the right turning command angle (θrv) for controlling the roller turning mechanism (DM1) when the vehicle is in a steering turn state. The left turning command angle (θlv) is smaller than the left steering angle (θl) indicated by the left steering angle information (S1L), and the right turning command angle (θrv) is smaller than the right steering angle (θr) indicated by the right steering angle information (S1R).

The application discloses an adjustable easy-centering transmission chassis dynamometer device and a dynamometer method, which comprise a base, a dynamometer hub, a sinking space, a sliding groove, an axial translation support and front and rear adjusting supports; a pair of the front and rear adjusting supports in the front and rear directions are provided with an adjusting interval on the dynamometer hub; a plurality of liftable support seats are further arranged on the middle part of the base; auxiliary positioning brackets are respectively arranged on the outer sides of the axial translation supports; the auxiliary positioning brackets are arranged in positive correspondence with the central axis of the dynamometer hub; and a centering sensor is arranged on the auxiliary positioning bracket. The adjustable easy-centering transmission chassis dynamometer device is convenient for the centering adjustment between a pair of wheels of a heavy-load vehicle, has high centering accuracy and high flexibility.

The application discloses a heavy vehicle carbon emission and oil consumption partition reconstruction evaluation method suitable for remote monitoring and actual road test, which is characterized in that: remote monitoring data or actual road test data of a target vehicle model are taken as vehicle real-time data input, vehicle real-time data per second and engine speed and net output torque of the drum data are partitioned and data correlated, average oil consumption level of the target vehicle model is obtained through data clustering of the partitioned data, reconstruction data of carbon emission or oil consumption level of each partition is obtained based on drum data prediction and average oil consumption level of the target vehicle model, different partition reconstruction data are spliced according to engine cycle process of the target vehicle model during oil consumption authentication on a chassis dynamometer, carbon emission or oil consumption level of the target vehicle model during use is obtained, and conformity or compliance of the carbon emission or oil consumption level is compared with an authentication result. The application improves the use efficiency of remote monitoring and actual road test data, and is simple in calculation, high in accuracy and strong in adaptability.

Electromagnetic wave-blocking structure (1) comprises: an electrically conductive flat belt (3) wound around a pair of rollers (2) arranged parallel under a metal base (103) and exposed through an opening (104) formed in the metal base (103) so that a tire (101 and 102) of a vehicle (100) is arranged on it; and an electrically conductive electromagnetic wave-blocking roller (4) arranged between the metal base (103) and the flat belt (3) at the opening (104), conductively connected to the metal base (103) and in contact with the flat belt (3) to rotate together with the movement of the flat belt (3).

The invention discloses a new energy automobile chassis dynamometer measurement and control device, and belongs to the technical field of vehicle testing devices. The new energy automobile chassis dynamometer measurement and control device comprises a measurement and control device body, a test board is fixedly installed in the measurement and control device body, two open grooves are correspondingly formed in the surface of the test board, and side grooves are formed in the inner walls of the two sides of the two open grooves. According to the new energy automobile chassis dynamometer measurement and control device, when tires of an automobile are located between the two rotating rollers, the acceleration performance of the automobile can be detected, the two-way lead screw rotates to drive the two rotating rollers to move in the opposite directions, then the tires of the automobile move downwards to make contact with the first simulated road surface and the third simulated road surface, and therefore the acceleration performance of the automobile can be detected. And when the tires of the vehicle fall on the second simulated road surface and the fourth simulated road surface, the tires of the vehicle and the suspension performance of the vehicle can be tested on different road surfaces, and the functionality of the measurement and control device body is increased.

The application provides a test method for cooling performance of a vehicle retarder, comprising the following steps: placing the vehicle on a chassis dynamometer in an environmental chamber, adjusting temperature parameters and humidity parameters of the environmental chamber to simulate an outdoor environment; setting a gear of the retarder of the vehicle to a constant speed gear, adjusting a slope parameter of the chassis dynamometer to a first preset slope to simulate a driving slope of the vehicle, and controlling the vehicle to drive at a first preset vehicle speed; recording a vehicle speed, a driving time of the vehicle, a driving mileage of the vehicle and an inlet-outlet temperature difference of the retarder cooling liquid during the driving of the vehicle at the first preset vehicle speed; and generating an analysis result according to the vehicle speed, the driving time of the vehicle, the driving mileage of the vehicle and the inlet-outlet temperature difference of the retarder, wherein the analysis result is used to represent whether the cooling performance of the retarder meets a design index. According to the test requirements, the environmental conditions and the road conditions are adjusted, the test variables are accurately controlled, and the test results are prevented from being affected by the external environment and the road conditions.

The purpose of the present disclosure is to provide a chassis dynamometer capable of restraining a vehicle without manual work during a driving test of the vehicle. A side roller (3L (31)), which is a left side roller, presses a restraining roller (33) against a tire (6L), which is a left tire, from the right side, thereby restraining the movement of the tire (6L) in the right direction. A side roller (3R) as a right side roller presses a restraining roller (33) against a tire (6R) as a right tire from the left side to restrain the movement of the tire (6R) in the left direction. A restraining roller (33) of the side roller (3L) is in contact with a lower region (6a) on the inner side of the tire (6L) and rotates in conjunction with the rotation of the tire (6L). A restraining roller (33) of the side roller (3R) is in contact with a lower region (6a) on the inner side of the tire (6R) and rotates in conjunction with the rotation of the tire (6R).

The utility model belongs to the technical field of vehicle detection, and provides a chassis dynamometer with variable inertia, which comprises a rack, and a roller mechanism and a driving motor which are respectively arranged on the rack, the roller mechanism comprises a first roller group and a second roller group which are arranged in parallel, the first roller group is in transmission connection with the output end of the driving motor, and the second roller group is in transmission connection with the output end of the driving motor. The second roller set is in transmission connection with the first roller set through a transmission mechanism. A transmission shaft is arranged at the end of the second roller set. The first flywheel, the second flywheel, the clutch and the vortex machine are arranged on the outer surface of the transmission shaft in a sleeving mode, the first flywheel and the clutch are fixedly connected with the transmission shaft, a bearing is arranged between the second flywheel and the transmission shaft, the clutch is arranged on one side of the second flywheel, and the clutch is a jaw electromagnetic clutch. The brake mechanism is arranged on one side of the peripheral face of the second flywheel. The device can be compatible with the measurement work of light vehicles and heavy vehicles, and has the characteristics of simple structure, good universality and high reliability.

A calibration method for a vehicle headlight (5) including a lamp unit (15) that is capable of changing in orientation in the left-right direction, and a sensor (36) that changes in orientation together with the change in orientation of the lamp unit (15) in the left-right direction and is capable of measuring acceleration in the front-rear and left-right directions of a vehicle (1), the calibration method including: a pseudo-travel step (S31) for causing the vehicle (1) to perform pseudo-travel by using a chassis dynamometer (100) including rollers (111) on which wheels (2) of the vehicle (1) are disposed: an acquisition step (S32) for acquiring acceleration information indicated by a signal output from the sensor (36) during pseudo-travel; a measurement step (S33) for measuring the orientation of the sensor (36) with respect to the front-rear direction of the vehicle (1) on the basis of the acquired acceleration information; and an adjustment step (S34) for changing the orientation of the lamp unit (15) in the left-right direction on the basis of the measured orientation of the sensor (36) with respect to the front-rear direction of the vehicle (1).

The invention discloses a multi-system collaborative test system based on a chassis dynamometer, and a development and test method, the system comprises a controller cabinet, the controller cabinet comprises a real-time controller and a multi-protocol fusion data communication module, the multi-protocol fusion data communication module is used for being connected with a plurality of test devices through a plurality of protocols, and the real-time controller is connected with the multi-protocol fusion data communication module; and the real-time controller is connected with an automatic test module, is used for automatically executing a test case, analyzing the test case and obtaining a test result, and comprises upper computer software, lower computer software and a database. According to the multi-system collaborative test system based on the chassis dynamometer and the development and test method, multi-device collaborative control can be realized, and integrated automatic test is carried out for the whole vehicle test of a new energy vehicle; the problems of equipment discretization, protocol fragmentation and data asynchronization are solved, the test efficiency and the test coverage rate are improved, and an efficient and accurate solution is provided for all-condition verification of a complex electrical system of a new energy automobile.

The invention discloses an auto-induction pumping dehumidification system for a chassis dynamometer pit, and the system comprises a water pump which is disposed at the bottom of the pit; the frame body is arranged on the wall of the pit hole, and a sliding rail is arranged on the frame body; the lifting mechanism is arranged on the sliding rail and performs lifting motion along the multi-surface inner wall of the pit hole; the water scraping part is arranged on the lifting mechanism and moves along with the lifting mechanism to scrape water on the multi-surface inner walls of the pit; and the sensing part is arranged on the frame body and electrically connected with the water pump so as to monitor the water level in the pit hole. And through the automatic induction water pumping and dehumidification functions, damage of accumulated water and moisture to the strand rotating equipment can be effectively avoided, and the equipment fault frequency is reduced. The water accumulation condition does not need to be manually and frequently checked, the equipment can automatically operate, and manual intervention is reduced. Test interruption caused by water accumulation is avoided, and the overall working efficiency of the heavy strand rotating test room is improved.

The invention relates to a multifunctional steering system of a chassis dynamometer for whole vehicle testing in an anechoic chamber and the anechoic chamber, and belongs to the technical field. The steering system capable of driving the whole dynamometer to rotate is formed by constructing the overall rotation mechanism and the center mechanism in the basement, rotation of the hub shaft system around the center within the range of 360 degrees can be achieved, and meanwhile tail gas collection and cooling of tires and grids can be achieved. The bottleneck that large-range rotation of the hub assembly cannot be achieved in the current industry is broken through, and then the steering angle of front wheels or rear wheels of a vehicle can be simulated, the relative movement of tires and the ground during vehicle steering can be simulated, and sufficient and repeatable EMC testing and verification can be conducted on steering-related ADAS functions of an intelligent networked automobile.

The invention discloses a method and a system for extracting actual road typical emission scene working conditions of a vehicle, solves the problems that influence factors in actual use of the vehicle are not considered and quantitative analysis is not performed on the vehicle in the prior art, and has the beneficial effect of facilitating reproduction of actual typical cycle working conditions on a laboratory chassis dynamometer. According to the specific scheme, the method for extracting the actual road typical emission scene working condition of the vehicle comprises the steps that emission factors are calculated; performing dimension reduction processing on the actual road working condition influence factors, and converting the actual road working condition influence factors into travel dynamic factors; carrying out a new round of factor analysis on the travel dynamic factor and the emission factor after dimension reduction, converting the correlation between the travel dynamic factor and the emission factor into an importance proportion, and taking the importance proportion as a weighting coefficient for calculating an Euclidean distance between data points during clustering analysis; obtaining a series of typical working condition fragment time sequence diagrams; and the optimal actual driving typical emission circulation working condition for synthesizing all pollutants is constructed.

This invention relates to a health monitoring system for a new energy vehicle chassis based on multi-source heterogeneous sensor fusion, belonging to the field of new energy vehicle manufacturing, and more specifically to the field of motor vehicle substructure. The system includes: a roller acquisition device for collecting various dynamometer-related data from a single-roller automotive chassis dynamometer; and a health monitoring device for intelligently analyzing the remaining mileage of the new energy vehicle's chassis shock absorbers before failure, using an intelligent chassis health monitoring model based on the multi-source heterogeneous sensor data and various dynamometer-related data. Through this invention, addressing the technical problem of the difficulty in predicting the timing of chassis shock absorber failures in new energy vehicles, this invention enables the use of different types of sensors to acquire various types of sensor data from the new energy vehicle chassis mounted on a single-roller automotive chassis dynamometer, and then employs an intelligent chassis health monitoring model to solve the aforementioned technical problem.

The invention provides a pure electric vehicle driving range test method and system and a vehicle, and relates to the technical field of pure electric vehicles, according to the method, temperature sensors are installed at a water inlet pipe and a water outlet pipe of a power battery cooling loop, the temperature of cooling liquid is directly measured, and the running state of a battery thermal management system is monitored in real time; the use environment of the vehicle under the real low-temperature working condition is effectively simulated by combining the vehicle immersion treatment and the chassis dynamometer test under the low-temperature environment; multi-dimensional data such as inlet and outlet water temperature difference, environment temperature, vehicle speed and mileage are synchronously collected, energy consumption in a low-temperature heating stage is screened by using a data analysis model, and the driving mileage is dynamically corrected, so that the accuracy and scientificity of a test result are improved, the test result is closer to the endurance performance of a user in actual driving, and the user experience is improved. The problem that the endurance is virtually high due to the fact that heat management energy consumption is ignored in a traditional testing method is solved.

Fire suppression system for an electric vehicle (1), comprising a roller test stand (100), a roller (200), a deployable fire extinguishing tray (300), an electric winch (230), a sensor, and a control unit (900). The roller test stand (100) accommodates a predetermined test on a test vehicle (1) located in a test zone (T). The roller (200) is positioned on one side of the test zone (T), and the deployable fire extinguishing tray (300) is connected to the roller (200) via unwinding cables (20) for being wound around or unwound from the roller (200). The electric winch (230) is located on the opposite side of the test zone (T) and is connected to the deployable fire extinguishing tray (300) via winding cables (30). The sensor collects predetermined information from the test vehicle (1).The control unit (900) unfolds the deployable fire extinguishing tray (300) under a predetermined condition beneath the test vehicle (1) and supplies extinguishing water to immerse the test vehicle in it.

The utility model discloses a heavy chassis dynamometer capable of being movably adjusted, which comprises a plurality of bottom supporting beams, a supporting seat, a dynamometer host, a supporting bottom plate, a sliding rail assembly, a sliding seat and a sliding seat supporting plate, and the supporting seat is connected and mounted on the sliding seat supporting plate; the sliding seat supporting plate is further provided with a driving assembly and a driving gear connected with the driving assembly. The supporting bottom plate is further provided with a rack parallel to the moving direction, and the driving gear is connected with the rack in a meshed mode so that the driving gear can move on the rack in the moving direction. According to the heavy chassis dynamometer, the distance between the dynamometer hosts can be adjusted according to the wheelbases of different tested vehicles, on the other hand, the dynamometer hosts at different positions can be selected in a free combination mode to carry out a dynamometer test, and the application range and the flexibility of the heavy chassis dynamometer are greatly improved; and the chassis dynamometer adopting the structural arrangement has the characteristics of large load, high supporting stability and the like.

The invention discloses a full-mileage test method for a plug-in hybrid power vehicle model. The method comprises the following steps: after pretreatment of drum sliding operation of a test vehicle on a chassis dynamometer is completed, the test vehicle is filled with oil and is fully charged; the engine oil temperature and the cooling liquid temperature of the engine before the vehicle test are set to be preset temperatures through standing; the running WLTC / CLTC cycle is repeated, the mileage test is carried out on the test vehicle on the chassis dynamometer in stages until the vehicle speed cannot meet the specified speed tolerance requirement, and then full mileage calculation is carried out, specifically, the pure electric driving mileage is the sum of the first-stage pure electric driving mileage and the second-stage pure electric driving mileage; and the full-oil and full-electricity driving range is the sum of the pure electric driving range and the hybrid power driving range. Based on the change of the driving mode in the test process, the mileage is monitored in stages, and the accuracy, reproducibility and universality of the working condition test can be ensured by standardizing the test environment and test equipment.

A method for disabling a hill recognition function, the method relating to the technical field of vehicle control. The method comprises: in response to the gear of a vehicle being shifted to a drive gear, acquiring vehicle data of the vehicle, wherein the vehicle data comprises the road surface acceleration, longitudinal acceleration data and yaw rate of the vehicle (110); when the vehicle data meets a first condition, determining that the vehicle is in a chassis dynamometer mode, wherein the chassis dynamometer mode refers to a mode of simulating actual road driving by means of a roller assembly (120); and when the vehicle is in the chassis dynamometer mode, disabling a hill recognition function of the vehicle (130). The testing efficiency of vehicles can thus be improved. Further provided are an apparatus for disabling a hill recognition function, and a vehicle-mounted terminal and a storage medium.

The invention relates to an automobile chassis dynamometer resistance and inertia simulation measurement system and method, and belongs to the technical field of automobile performance testing, and the system comprises a multi-axis force measurement module, an environment compensation module, a multi-source data acquisition module, a dynamic dynamometer module and other core assemblies. Vehicle resistance information is collected through a multi-axis force transducer and is corrected in combination with environmental factors, accurate simulation of resistance and inertia of a target vehicle is realized by using a kinetic model and a PID algorithm, and error information is further calculated to optimize a test result. According to the invention, the technical effects of improving the resistance and inertia simulation precision and enhancing the measurement reliability and adaptability are achieved.

This utility model discloses a fixing auxiliary structure for a linear velocity sampling wheel used in chassis dynamometer calibration. The fixing auxiliary structure includes an adjustable bracket and a clamping connection mechanism. The clamping connection mechanism is mounted on the adjustable bracket. The adjustable bracket includes a guide rod, an adjustable angle adjustment mechanism, a height adjustment mechanism, and a connecting plate. The height adjustment mechanism is sleeved on the guide rod. One side of the connecting plate is fixed to one side of the height adjustment mechanism, and one end of the height adjustment mechanism is fixed to the other side of the connecting plate. A transverse fixing rod is fixed on the angle adjustment mechanism. The clamping connection mechanism is mounted on the transverse fixing rod to achieve the installation and fixing of the clamping connection mechanism and the adjustable bracket. The transverse fixing rod is fixed to the height adjustment mechanism through the angle adjustment mechanism and the connecting plate. This utility model allows for adjustment of the height and angle of the linear velocity sampling wheel through the adjustable bracket, improving the flexibility and practicality of fixing the linear velocity sampling wheel.