382 results about "Wheel speed sensor" patented technology

The invention discloses a dynamic adhesion coefficient correction evaluation method and system based on multi-source data fusion, and belongs to the field of vehicle electronic control, and the method comprises the following steps: S1, carrying out the data collection of a multi-source sensor; s2, calculating a slip rate based on data collected by a wheel speed sensor, calculating a dynamic compensation factor based on data collected by a suspension load sensor, correcting a centroid offset error based on data collected by an inertial sensor, and triggering segmented compensation based on data collected by a brake disc temperature sensor; s3, calculating a basic adhesion coefficient based on the slip rate; s4, correcting the basic adhesion coefficient based on the dynamic compensation factor and the corrected centroid offset; and S5, the basic braking force and the basic torque distributed by the ESC system are corrected. By adopting the dynamic adhesion coefficient correction evaluation method and system based on multi-source data fusion, high-precision correction of the dynamic adhesion coefficient and intelligent adjustment of the braking force are realized through multi-source sensor data fusion and ESC system integrated design.

The invention relates to a self-adaptive longitudinal vehicle speed estimation method, which comprises the following steps of: establishing detailed vehicle dynamic models, including a vehicle longitudinal dynamic model and a wheel speed dynamic model; a Sage-Husa self-adaptive unscented Kalman filtering algorithm is combined with a vehicle dynamics model, a state equation and an observation equation are designed, the longitudinal vehicle speed of a vehicle serves as a state variable, and observation vectors are constructed through data collected by a wheel speed sensor, an acceleration sensor and the like; divergence calculation is introduced for detecting and correcting divergence phenomena in the filtering process; and on the basis of a self-adaptive mechanism of a Sage-Husa algorithm, the filtering gain is adjusted in real time, and the vehicle speed estimation process is optimized. The improved Sage-Husa adaptive filter can dynamically adjust the filter parameters according to the change of the system state and the difference of noise, detects transient disturbance in combination with divergence calculation, reduces the influence of the transient disturbance on longitudinal vehicle speed estimation, and effectively improves the estimation precision.

The invention provides a wheel speed detection device and a chip system. The wheel speed detection device comprises a first comparator, a second comparator and a signal analyzer, the first comparator and the second comparator are respectively configured with different reference voltages, and the input end of the first comparator and the input end of the second comparator are used for receiving voltage signals generated by the same wheel speed sensor; and the signal analyzer is used for analyzing the wheel speed information according to the first comparison signal output by the first comparator and the second comparison signal output by the second comparator. Thus, the input signal is subjected to multi-threshold judgment by using a double-comparator structure, so that sensor signals of different current levels can be identified and analyzed uniformly, and compatible processing of sensor signals of multiple protocols is realized. Therefore, the problem that the overall system cost is increased due to hardware redundancy and system complexity increase in a traditional scheme is avoided, and the universality and the integration capacity of the interface module are effectively improved in a low-cost mode.

The invention provides a modular multi-shaft redundant braking system and a braking pressure distributed calculation and distribution method thereof. The system comprises an air storage tank, a battery and a plurality of redundant brake units arranged on all axles of the multi-axle vehicle respectively, and each axle of the multi-axle vehicle is independently provided with one redundant brake unit. The shaft redundant brake unit comprises a redundant brake module, and a shaft left wheel brake cylinder, a shaft right wheel brake cylinder, a shaft left wheel speed sensor and a shaft right wheel speed sensor which are respectively connected with the redundant brake module; the redundant braking module is connected with the air storage tank and the battery so as to obtain a braking air source and a working power source. The communication networks of all the redundant brake modules are mutually connected and are connected with a whole vehicle network; the problems that an existing redundant braking system is high in cost and low in redundancy are solved.

The utility model discloses a wheel speed signal processing system, which comprises a sensor driving circuit and a computing unit, the sensor driving circuit comprises at least two integrated circuits, and the integrated circuits are connected with the computing unit and a wheel speed sensor. According to the wheel speed signal processing system, the sensor circuit is combined with a certain controller module in a vehicle, redundancy detection of the wheel speed sensor is achieved through certain control logic, identification of wheel speed signals is not affected by single-point failure in any circuit, and reliability can be improved. The utility model further discloses a vehicle.

The present disclosure relates to a brake system and a method of controlling the same, the brake system including first and second wheel speed sensors respectively installed in wheels of a vehicle, electrohydraulic brakes respectively installed in front wheels of the vehicle, electromechanical brakes (EMBs) respectively installed in rear wheels of the vehicle, and a first controller configured to perform braking control on the electrohydraulic brakes and the electromechanical brakes based on a first front wheel speed signals outputted from the first wheel speed sensors installed in the front wheels, in which when a failure of the first wheel speed sensors installed in the front wheels are identified, the first controller performs the braking control on the electrohydraulic brakes and the electromechanical brakes based on the first rear wheel speed signals outputted from the first wheel speed sensors installed in the rear wheels.

The invention relates to an electric vehicle regenerative braking stability control method and system oriented to a non-standard road surface. The regenerative braking stability control method in the vehicle emergency braking scene comprises the steps that according to information obtained by a wheel speed sensor, in combination with vehicle parameters and the vehicle speed, processing is conducted through a dynamic model, and the relation between the current slip rate and the optimal slip rate is obtained. And inputting the identified slip rate at the peak attachment state moment as a control reference quantity into a model prediction controller, solving a torque required by motor braking in the controller, inputting the torque into a motor control unit, and performing regenerative braking through an electric driving system. On the basis of identifying the slip rate, the method gets rid of the problem of dependence on a tire model existing in most response-based methods, does not need to consider a tire ground model, damping rigidity and other difficult-to-obtain quantities, is not limited by various information acquired by multiple sensors, and is high in accuracy. And the applicability of the method under different working conditions is improved while the identification method is simplified.

A brake system may include a plurality of wheel speed sensors respectively installed in a plurality of wheels of a vehicle, a plurality of hydraulic brake modules related to braking of the plurality of wheels, and a first controller configured to perform braking control on the plurality of hydraulic brake modules in response to at least one of a pedal displacement signal, which corresponds to a movement of a brake pedal, and wheel speed signals outputted from the wheel speed sensors, in which when a failure of the first controller is identified, a second controller, which is provided in a steering system of the vehicle, performs braking control on an electronic parking brake, which is provided in at least one of the plurality of wheels, in response to at least one of an operating signal of an EPB switch, the pedal displacement signal, and the wheel speed signals outputted from the wheel speed sensors.

The invention discloses a lane level positioning method based on multi-sensor fusion, and the method comprises the steps: obtaining the initial global position of a vehicle through a plurality of layers of redundant sensors, and carrying out the time synchronization of each sensor, the plurality of layers of redundant sensors comprising a GNSS-RTK positioning module, an IMU, a wheel speed sensor, a 4D millimeter wave radar, a camera, and a lightweight high-precision map; judging whether GNSS-RTK positioning is effective or not, selecting different fusion strategies, and dynamically adjusting the weight of each positioning source based on environmental perception; and converting the fused local coordinates into UTM coordinates, and outputting high-frequency pose information. According to the scheme of the invention, the positioning reliability and environmental adaptability are realized while the lane-level precision is ensured, and key technical support is provided for high-level intelligent driving. And due to the redundant design of multiple sensors, the problem that the performance of a traditional scheme is broken in a complex scene is effectively solved.

The utility model provides a pushing power assisting system and an electric scooter, the pushing power assisting system is arranged on the electric scooter, and the pushing power assisting system comprises a wheel speed sensor and a controller; the wheel speed sensor is connected with the controller, and the controller is connected with the power module; the wheel speed sensor is used for acquiring a pushing speed signal and sending the pushing speed signal to the controller; the controller is used for controlling output power applied to the power module according to the pushing speed signal when pushing assistance is carried out, so that the power module provides the output power, and the power module provides the output power for the electric scooter. The output power is adjusted according to the pushing speed signal detected by the wheel speed sensor, flexible control over the output power provided by the power module is achieved, it is avoided that the same output power is provided under different scenes, and the pushing experience of a user under different road conditions is improved.

A method for estimating a chassis pitch angle (θv) of a vehicle (2) and a road hill angle (θR) of a road travelled by the vehicle (2), wherein a longitudinal dynamic of the vehicle (2) is modelled as a continuous-time linear dynamic system comprising a scalar input (u) defined by a variation of longitudinal velocity (αx) of the vehicle (2), a state vector (x) defined by a plurality of variables including the chassis pitch angle (θv), a chassis pitch rate (θv) of the vehicle (2), the road hill angle (θR) and a road hill rate (θR), an output vector (y) defined by a plurality of variables selected within a group consisting of the longitudinal acceleration (αxm) of the vehicle (2) and a total pitch rate (θm) of the vehicle (2) represented by the sum of the chassis pitch rate (θv) and the road pitch rate (̇θR). The scalar input (u) is measured by means of a wheel speed sensor (13) of the vehicle (2), the output vector (y) is measured by means of an inertial measurement unit (3) of the vehicle (2), the continuous-time linear dynamic system is discretized, a Kalman Filter is real-time applied to the discrete-time linear dynamic system by using the measured scalar input (u) and the measured output vector (y) for estimating the state 15 vector (x), and values of the chassis pitch angle (θv) and the road hill angle (θR) are extracted from the estimated state vector (x).

The invention relates to the technical field of loaders, and discloses a loader control method and device, electronic equipment and a storage medium, and the method comprises the following steps: obtaining whole vehicle state parameters of the loader under the current working condition; the current working condition comprises a shoveling working condition or a driving working condition; determining whether the wheel of the loader slips or not according to the state parameters of the whole vehicle; when it is determined that whether the wheel of the loader slips or not is judged, slip judgment parameters are determined according to the state parameters of the whole loader; determining whether wheels of the loader slip or not according to the slip judgment parameters; and when the wheels of the loader slip, a driving motor of the loader is controlled to reduce the request torque, and the change rate of the request torque is reduced. The accuracy of loader slip identification is improved, the application range of an anti-slip strategy is expanded, meanwhile, a wheel speed sensor does not need to be additionally installed, and the hardware cost is controlled while the performance is optimized.

The invention provides a vehicle braking control method and system and electronic equipment, and relates to the field of vehicle braking control. According to the method, when a hydraulic braking system and a wheel speed sensor fail at the same time, vehicle state information can be obtained through an inertial sensor of a vehicle; and an accurate braking instruction is generated to control the parking brake to carry out emergency braking on the vehicle, so that the potential safety hazard that the parking brake cannot be controlled through an electronic hand brake to carry out emergency braking on the vehicle when a hydraulic braking system and a wheel speed sensor simultaneously fail in the prior art is solved.

The utility model relates to the technical field of simulation, and discloses a wheel speed signal simulation device and a semi-physical simulation test system, the wheel speed signal simulation device comprises an FPGA processor and at least one signal channel connected to the FPGA processor, and each signal channel comprises a signal processing module, a signal output module and a signal conversion module. The signal processing module and the signal output module of each signal channel are respectively connected with the FPGA processor, and the signal output module selects an output mode according to a mode selection signal output by the FPGA processor. The wheel speed signal simulation device can simulate the signal output of a vehicle wheel speed sensor, supports the simultaneous output of a plurality of channels, can respectively simulate different types of sensors through the plurality of channels, supports the fault simulation of the wheel speed sensor, and cooperates with the fault diagnosis function of a verification controller.

A vehicle control system with which different vehicle functions, such as a driving dynamics function and / or a component protection function, can be controlled, in which vehicle control system, in the case of onroad driving, an rpm-based vehicle speed determined by a wheel speed sensor forms a reference variable, on the basis of which the vehicle control system determines driving parameters and / or controls the vehicle function. The vehicle control system is assigned an evaluation unit which, in the presence of both offroad driving operation and a tire change signal, determines a GPS-based vehicle speed as a reference variable, on the basis of which the vehicle control system determines the driving operation parameters, such as an offroad tire diameter, and / or controls the vehicle functions.

The present disclosure relates to a brake system and a method of controlling the same, the brake system including first and second wheel speed sensors respectively installed in wheels of a vehicle, electrohydraulic brakes respectively installed in front wheels of the vehicle, electromechanical brakes (EMBs) respectively installed in rear wheels of the vehicle, a first controller configured to perform braking control on the electrohydraulic brakes and the electromechanical brakes based on first wheel speed signals outputted from the first wheel speed sensors of the wheels, and a second controller configured to perform braking control on the electrohydraulic brakes and the electromechanical brakes based on second wheel speed signals outputted from the second wheel speed sensors of the wheels in response to a failure of the first controller.

A method for controlling an electronic mechanical brake apparatus, the method comprising: sharing wheel speed information acquired from a plurality of wheel speed sensors by a plurality of wheel controllers using a first communication line and a second communication line, and determining whether it is possible to estimate a vehicle speed using the shared wheel speed information; In response to determining whether the vehicle speed can be estimated, generating an emergency braking force based on a change in the vehicle speed by the plurality of wheel controllers to brake the vehicle; In response to determining that the condition for estimating the vehicle speed is not satisfied, generating the emergency braking force based on the change in wheel speed by the plurality of wheel controllers to brake the vehicle.

The invention provides rough road detection for a vehicle. Methods and systems are provided, including: a wheel speed sensor of a vehicle configured to obtain wheel speed sensor data regarding a wheel speed of the vehicle; and a processor coupled to the wheel speed sensor and configured to at least facilitate: determining variability of the wheel speed sensor data; and determining a roughness measure of a path on which the vehicle is operating based on the variability.

The invention discloses a brake-by-wire booster pressure control method, electronic equipment and a vehicle, and belongs to the technical field of vehicles. The method comprises the following steps: determining the braking demand pressure of a driver according to a pedal travel sensor signal, a driving mode signal and a current vehicle speed; determining an external brake demand pressure according to the external brake request signal; determining comfortable parking brake pressure according to the current vehicle speed and the current deceleration; brake pressure needed by the ramp is determined according to the gradient sensor signal and the wheel speed sensor signal; acquiring an anti-lock control pressure; determining a braking mode according to the current vehicle speed; and brake pressure output is determined according to the brake demand pressure of the driver, the external brake demand pressure, the comfortable parking brake pressure, the brake pressure needed by the ramp, the anti-lock control pressure and the brake mode. By formulating pressure decision logic and integrating multi-source requests, a coordination mechanism of'maximum value demand and minimum value constraint security 'is proposed for the first time, and system response is ensured to be safe and accurate.

The invention discloses a high and low temperature resistant swing-resistant cable for connection of an ABS wheel speed sensor, and belongs to the technical field of cables. The high and low temperature resistant and swing resistant cable for ABS wheel speed sensor connection comprises a light ABS wire harness, two power lines symmetrically arranged on the two sides of the light ABS wire harness and two third reinforcing units symmetrically arranged on the two sides of the light ABS wire harness, and the symmetry axis of the two third reinforcing units is perpendicular to the symmetry axis of the two power lines; an outer sheath layer is arranged outside the light ABS wire harness, the two power lines and the two third reinforcing units. A light filling layer is filled among the light ABS wire harness, the two power lines, the two third reinforcing units and the outer sheath layer; the light ABS wire harness comprises two insulating wire harnesses which are symmetrically arranged, a first insulating layer which wraps the insulating wire harnesses, and a fan-shaped filling layer which is filled between the two insulating wire harnesses and the first insulating layer. And a second reinforcing unit is arranged in each fan-shaped filling layer.

The embodiment of the invention provides an automatic assembling production line for wheel speed sensor terminals, and relates to the field of wheel speed sensor terminal assembling. A wheel speed sensor terminal automatic assembling production line comprises an assembling table and a flexible conveying chain extending along the assembling table, multiple sets of second material clamps are installed on the flexible conveying chain at intervals and used for clamping and conveying cables, and a discharging unit is arranged at one end of the assembling table and used for containing the cables to be machined. One end of the cable is output by the discharging unit, then is sequentially clamped by the second material clamps, is conveyed to a subsequent station along the flexible conveying chain, and sequentially passes through the first peeling unit and the second peeling unit which are arranged on the assembly table to perform peeling treatment on the two ends of the cable. By integrating an automatic process and a flexible conveying system, efficient and accurate continuous production of the wheel speed sensor terminal is achieved, the product quality and the production efficiency are remarkably improved, the labor cost and the defective rate are reduced, and good application prospects and economic benefits are achieved.

The embodiment of the invention discloses a driving vehicle comfort control method and device and electronic equipment. The method comprises the steps that vector features corresponding to information of protrusions in front of a vehicle are obtained; in response to the condition that the vector feature meets a preset first control condition, determining a parameter group matched with the vector feature in a preset database based on a Hash algorithm, so as to adjust the opening degree of an electromagnetic valve of the shock absorber based on a damping coefficient in the parameter group; and based on the current speed and the current sprung mass of the vehicle, the damping coefficient is adjusted through a PID control algorithm. In the embodiment of the invention, the existing vehicle-mounted sensors (a wheel speed sensor, a longitudinal acceleration sensor, a motor torque signal and a camera) can be completely reused to construct a sensing network of the preview system, and the effect close to that of an advanced preview system can be achieved without additionally invested hardware cost of a high-precision laser radar and a double-cavity air suspension. And the method can be adapted to middle and low-end vehicles to meet the driving comfort requirements of middle and low-end users.

The utility model discloses a high-stability wheel speed sensor sensing head, and relates to the field of wheel speed sensors, the high-stability wheel speed sensor sensing head comprises a framework and a sensing assembly installed on the framework, an insertion groove is formed in the outer wall of one side of the framework, an installation groove is formed in the outer wall of the top of the framework, and installation openings are formed in the inner walls of the two sides of the installation groove; and mounting assemblies are mounted on the inner walls of the two mounting openings. According to the invention, through the cooperation of the mounting groove and the insertion groove in the skeleton, the induction assembly can be conveniently mounted, meanwhile, the induction assembly can be conveniently protected through the arrangement of the skeleton, the induction assembly is prevented from being damaged due to exposure, and the safety performance of the induction assembly is improved while the stability of the induction assembly is improved.

The utility model discloses a wheel speed sensor anti-drop terminal, and relates to the field of automobile accessories, the wheel speed sensor anti-drop terminal comprises a skeleton, a partition plate is fixedly connected in the skeleton, two guide blocks are arranged in the skeleton, one end of each guide block extends out of the skeleton, the other end of each guide block is provided with a wire clamping port used for plugging a copper wire harness, and the partition plate is provided with an anti-drop assembly used for preventing the copper wire harness from loosening. According to the invention, through cooperative arrangement of the through groove, the bidirectional screw rod, the clamping plate and other structures, during use, a copper wire harness is firstly inserted into the wire clamping opening, then the bidirectional screw rod is rotated through the rotating disc, and the wire clamping opening is clamped in the through groove; the two-way screw drives the two clamping plates to get close to each other, the two clamping plates clamp and fix the copper wire harness, the copper wire harness is prevented from being separated from the wire clamping opening, and the problem that the copper wire harness of the wheel speed sensor is likely to be loosened from the wire clamping opening due to long-time bumping and poor contact is caused is solved as much as possible.

This invention discloses a control method for intelligent traffic cones, relating to the field of intelligent traffic cones. It establishes a communication connection between the intelligent traffic cones and a central control system based on a fixed base. Simultaneously, the algorithm module analyzes the current position of the moving cone group in the inertial coordinate system based on image data collected by a camera and feeds this position information back to the central control system. When deployment is required, the central control system generates corresponding deployment path information based on the current position and pre-arranged formation of each moving cone group and issues a deployment command and corresponding path information to the control module. After receiving the deployment command, the control module, combining attitude calculation from the inertial navigation module, angular velocity measurement from the wheel speed sensor, calculation from the algorithm module, and the directional error adjustment mechanism of the PID controller, accurately executes the path movement task, effectively solving the path conflict or overlapping coverage problems that may occur during the collaborative deployment of multiple intelligent traffic cones.

The invention discloses an intelligent anti-lock braking system for a front wheel of an electric motorcycle, and particularly relates to the technical field of braking systems, and the system comprises a wheel speed feature extraction module which is used for calculating a wheel speed change value and generating a deviation coefficient; the locking risk judgment module compares the wheel speed change value with a threshold value and outputs a risk code; the basic braking force generation module collects a voltage value and converts the voltage value into braking force; the instruction integration module generates a correction instruction according to the risk code; the braking force output control module calculates a hydraulic value and outputs a braking instruction. According to the intelligent anti-lock braking system for the front wheel of the electric motorcycle, the wheel speed change value and the dynamic lock threshold value are calculated through the wheel speed sensor, the risk code is output according to the difference value and the threshold exceeding frequency, and the braking strategy is dynamically adjusted; acquiring a voltage value of a brake handle stroke sensor, converting the voltage value into braking force, and establishing braking operation association; a correction instruction is output according to the risk codes, a braking instruction is output in combination with hydraulic data, and the braking stability and safety of the electric motorcycle are enhanced.

This utility model discloses a monitoring device for the drive-by-wire chassis of an underground trackless transport vehicle, relating to the technical field of transport vehicle chassis monitoring devices. It includes a base with grooves on both sides of the top of the base. A mounting plate is slidably connected within the grooves, and a limit mechanism is installed within the grooves. A monitoring mechanism is mounted on the mounting plate. This utility model, through the cooperation of a camera and lidar, facilitates the detection of the vehicle's surrounding environment, providing information to help the vehicle adapt to different driving environments and improving the device's adaptability. Through the cooperation of wheel speed sensors and a data processor, it facilitates the monitoring of the vehicle's driving status, enabling rapid detection of abnormal vehicle operation and reducing the probability of device accidents. The cooperation between the mounting plate and the base facilitates the rapid assembly and disassembly of the monitoring mechanism, increasing the device's installation speed. This device improves the monitoring capability of the vehicle's condition and reduces the probability of sudden accidents.

An electric all-wheel-drive vehicle includes front and rear electric motors, an accelerator sensor, front and rear wheel speed sensors, and one or more processors. The one or more processors are configured to, when a predetermined learning condition is established, vary output torque of the rear electric motor and output torque of the front electric motor, while satisfying requested torque, to learn longitudinal differential rotation at which total power consumption or total torque of the front electric motor and the rear electric motor is minimized. The one or more processors are configured to, after learning the longitudinal differential rotation, control the output torque of the front electric motor and the output torque of the rear electric motor to allow actual longitudinal differential rotation to match with the learned longitudinal differential rotation.

The invention discloses a triboelectric wheel speed sensor based on a magnetic field modulation mechanism, and belongs to the technical field of speed measurement sensing. The sensor comprises a mechanical sensing unit and a signal processing unit, the mechanical sensing unit adopts a coaxial nesting structure of a low-speed rotor, a fixing device and a high-speed rotor, and low-speed rotation is converted into reverse high-speed rotation of the high-speed rotor by utilizing a magnetic gear mechanism, so that the friction nano power generation unit is driven to generate an alternating-current voltage signal of which the frequency is in direct proportion to the rotating speed; and the signal processing unit is used for processing the signal and calculating the wheel speed and the linear speed. Magnetic field modulation and friction power generation are combined, the output signal frequency and the signal-to-noise ratio under the low-speed working condition are effectively improved, the self-energy-supply characteristic is achieved, the defects that a traditional sensor is weak in signal and depends on an external power source at the low speed are overcome, and a high-reliability solution is provided for intelligent traffic wheel speed monitoring.

The application provides an automobile adaptive cruise system, a control method, a control device, a medium and a vehicle, and the automobile adaptive cruise system comprises a road surface preview system, a road surface parameter updating system, a defensive adaptive cruise controller, a driving actuator, a braking actuator and a sensor group, wherein the sensor group comprises a wheel speed sensor and a combined inertial navigation system, the wheel speed sensor acquires wheel speed, and the combined inertial navigation system acquires the longitudinal speed and acceleration of the vehicle. Since the proposed defensive adaptive cruise control strategy can consider the adverse road surface conditions in advance, no obvious speed or torque step change will be generated when driving in the transition area of the road surface with different adhesion conditions, and the control is relatively smooth.