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2826 results about "Brake control" patented technology

Supermarket self-help settlement and shopping system and its method

InactiveCN101127141AAchieving Unique ConfirmationEasy to detectCash registersTransceiverWireless transceiver
The utility model discloses a system and a method for self-help-settlement shopping in supermarkets, which is characterized in that a wireless network connected with a commodity information server is arranged in supermarkets; a gravity sensor is arranged on a shopping cart and the commodity weight on the shopping cart detected is input to a microprocessor; a bar code reader is connected with the microprocessor and the detected commodity bar code information is input; a reader-writer of payment cards reads and writes the information of a payment card inserted by a customer; a touch screen completes man-machine communication of the customer and the self-help-settlement system; the microprocessor is connected with the wireless network through a wireless transceiver and is connected with an electronic brake through a data interface so as to provide braking control signals; a charging power supply provides power for each part; each commodity is self-scanned by a customer when shopping; the amount of the shopping card is deducted and human intervention supervision is not needed with exact identification; the utility model has the advantages that not only the cost of cash desk construction and checkout employee employment for supermarkets is reduced, but also the slowness of settlement speed and queuing jam of customers are avoided; and the benefit of supermarkets is increased.

No-signal intersection vehicle and vehicle cooperative collision prevention system

The invention discloses a no-signal intersection vehicle and vehicle cooperative collision prevention system, which comprises a wireless communication module, a central processing unit, a vehicle running state information collecting module, a driving intention judging module, a man-machine interaction interface, a brake control module and a power supply management module. According to the system, information such as self vehicle position, speed, acceleration and the like are collected by the vehicle running state collecting module, and the self vehicle running state is obtained; the vehicle turning information is collected through the driving intention judging module, and the driving intention of a driver is judged; the self vehicle information is sent out to the periphery by the wireless communication module in a broadcasting way, and the running state information of surrounding vehicles is received; the central processing unit is connected with the vehicle running state information collecting module, the driving intention judging module and the wireless communication module, information of the self vehicle and other vehicles is obtained, the collision judgment and the disposition are carried out, the collision occurrence is judged, the vehicles are controlled to be braked through the brake control module, and early warning signals are given to the driver through the man-machine interaction interface; the man-machine interaction interface can also control the starting and the stop of the system; and the power supply management module provides power supply for each module of the system.

Anti-lock braking system based on an estimated gradient of friction torque, method of determining a starting point for anti-lock brake control, and wheel-behavior-quantity servo control means equipped with limit determination means

An anti-lock braking system includes a friction torque gradient estimating unit for estimating, from a small number of parameters, the gradient of friction torque with respect to a slip speed, and controls a braking force acting on wheels on the basis of the friction torque gradient estimated by the friction torque gradient estimating unit. The friction torque gradient estimating unit may employ several types of estimating methods; e.g., a method of estimating the gradient of friction torque from only time-series data concerning a wheel speed; a method of estimating the friction torque gradient from time-series data concerning wheel deceleration as well as from braking torque or time-series data concerning physical quantities associated with the braking torque; or a method of estimating the friction torque gradient from micro-gains which are obtained when brake pressure is excited in a very small amount at the resonance frequency of a vibration system comprising a vehicle, wheels, and a road surface and which represent the characteristics of the vibration system. Further, there is also disclosed a method of determining, from the thus-estimated friction torque gradient, the limit of the characteristics of friction torque developed between the wheels and the road surface.

Brake control unit for railway vehicle

The invention discloses a brake control unit for a railway vehicle. The brake control unit comprises a brake control part and an axle non-rotation detection part which are electrically independent of each other. The brake control part comprises a pneumatic brake control unit, a wheel sliding protection unit, an MVB network communication port and a serial port communication port. The axle non-rotation detection part comprises an axle speed anomaly detection unit, an MVB network communication port and a serial port communication port. The pneumatic brake control unit can conduct brake instruction receiving, brake force calculating, EP current control, EP current lag compensation control and the like. The wheel sliding protection module can conduct sliding and locking detection, sliding prevention and locking prevention control, tread sweeping control and ATC axle sliding state output. The axle speed anomaly detection unit judges whether a certain axle is locked or not or whether the speed of the axle is abnormal or not. The independent axle non-rotation detection part is arranged in the brake control unit, and therefore the working current of a speed sensor can be independently monitored and reported to a vehicle diagnosis device, and the safety level of the brake control unit is increased.

Braking control system for a vehicle being towed by another vehicle

A system for controlling the braking system of a towed vehicle being towed by a towing vehicle having a towing vehicle subsystem for the towing vehicle and a towed vehicle subsystem for the towed vehicle. The towing vehicle subsystem includes a towing vehicle control mechanism having a brakes-on indicator and a towing vehicle receiver mechanism for receiving wireless modulated digital signals. The towed vehicle subsystem for a towed vehicle includes a towed vehicle control mechanism, a linkage mechanism connecting the towed vehicle control mechanism to the braking system of the towed vehicle, a sensing mechanism for sensing activation of the braking system of the towed vehicle, and a towed vehicle transmitter mechanism for transmitting wireless modulated digital signals to the towing vehicle transmitter mechanism, wherein actuation of the towing vehicle control mechanism by an operator of the towing vehicle actuates the towed vehicle control mechanism causing the linkage mechanism to actuate the braking system of the towed vehicle and wherein the sensing mechanism, upon sensing actuation of the braking system of the towed vehicle, causes the towed vehicle transmitter mechanism to wirelessly transmit modulated digital signals to the towing vehicle receiver mechanism which, in conjunction with the towing vehicle control mechanism, causes the display device to indicate that the braking system of the towed vehicle has been actuated. A modified embodiment further includes a towing vehicle transmitter mechanism and a towed vehicle receiver mechanism for wirelessly actuating the braking system of the towed vehicle without actuating the braking system of the towing vehicle.

Antilock brake systems employing a sliding mode observer based estimation of differential wheel torque

Improved methods and systems for controlling hydraulically or electrically actuated anti-lock brake systems (ABS) on air and land vehicles requiring only measurement of wheel angular speed although brake torque measurements can also be employed if available. A sliding mode observer (SMO) based estimate of net or different wheel torque (road/tire torque minus applied brake torque) derived from the measured wheel speed is compared to a threshold differential wheel torque derived as a function of a “skid signal” also based on wheel speed only to generate a braking control signal. The braking control signal can be employed to rapidly and fully applying and releasing the brakes in a binary on-off manner and, as an additional option, possibly modulating the maximum available brake hydraulic pressure or electrical current when the brakes are in the “on” state in a continuous manner. In the case of the basic on-off component of braking, the brakes are released when the estimate of differential wheel torque is less than the threshold differential wheel torque (i.e. for relatively high values of brake torque), and the brakes are applied fully when the estimate of differential wheel torque is greater than or equal to the threshold differential wheel torque. For aircraft landing gear applications, a fore-aft accelerometer mounted on the landing gear can be used to suppress nonlinear gear displacement oscillations commonly called gear walk in the direction of wheel roll.

Coordinated braking control method of electric automobile

ActiveCN101913352APrecise response to total braking force demandBraking action transmissionControl systemElectric machinery
The invention relates to a coordinated braking control method of an electric automobile, which comprises the following steps of: 1. setting a coordinated braking control system; 2. when the automobile is under a braking or sliding condition, carrying out analysis processing on a braking command by whole automobile controller in the following conditions: (1) the dynamic coordinated control at the initial period of the common braking of a motor braking system and a hydraulic braking system; (2) the coordinated control giving priority to braking safety, i.e. under the condition of requiring larger braking torque; (3) the coordinated braking control giving priority to braking energy recovery, i.e. small-strength braking; and (4) a dynamic part, wherein the charge state of the battery and the rotating speed of a motor of the electric automobile are synthetically considered, when the charge state of the battery is higher and the battery does not need to be charged, the maximum braking torque provided by the motor is reduced, but the required braking torque is still provided by the motor; and 3. proportionally distributing the analysis results in the steps between the motor braking system and the hydraulic braking system to finally achieve the purpose of carrying out the coordinated braking control on the electric automobile.

Airplane anti-skid brake control system and method

InactiveCN102556340AAnti-skid brake control method is simple and easyEasy to controlBrake regulatorsApplication and release valvesWheel speed sensorControl system
The invention relates to an airplane anti-skid brake control system and an airplane anti-skid brake control method. In the airplane anti-skid brake control system, two airplane wheel speed sensors are respectively applied to a left airplane wheel and a right airplane wheel of the airplane and connected with the input end of an electronic anti-skid control box; an electro-hydraulic servo valve is connected with a brake valve, a brake device, the electro-hydraulic servo valve and the electronic anti-skid control box respectively; the input port of the electronic anti-skid control box is connected with the airplane wheel speed sensors; and the output port of the electronic anti-skid control box is connected with the electro-hydraulic servo valve. In the invention, the electronic anti-skid control box judges true and false of the received airplane speed signal by comparing the airplane speed signal to be judged with the speed of the airplane wheels at different time or comparing the speed signals of the two airplane wheels so as to perform anti-skid control according to the speed signals of the airplane wheels which are judged to be true; and the airplane wheel brake pressure is adjusted according to the received instruction through the electro-hydraulic servo valve, so safe and reliable brake of the airplane wheels is realized.
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