Abstract: The invention relates to an apparatus (30) for irradiating the human body or parts of the human body with optical radiation. The apparatus (30) comprises a first interface (20) for transmitting data, an analysis module (22) for creating a parameterized operating environment (23) on the basis of the transmitted data, a control unit (24) for adapting device settings on the basis of the parameterized operating environment created, and an irradiation unit (26) which receives a signal (25) from the control unit (24) according to the parameterized operating environment (23) created. The invention further relates to a system, a method and a computer program product for carrying out the method.

Abstract: To improve the reliability of operation of an anti-skid braking system, and to provide a warning indication if malfunction should occur in such a system (ABS), a pressure-responsive switch (6, 62, 63) having two switching elements (S.sub.1 S.sub.2 ; 43a, 44a, 43b, 44b, 46a, 46b, 47a, 47b) is connected to a pressurized hydraulic brake fluid connection line to a control valve for a vehicle brake, the switches providing, respectively, control signals of different levels of pressure applied thereto, and, in case of failure of one switch to respond to a higher pressure level, at which time a pump motor is to be energized to resupply the pressure, a second switch, responsive to a lower pressure value, is provided, providing a further warning indication and, if appropriate, disconnecting the ABS with a disconnect indication to the operator that the braking system is placed back under operator control.

Abstract: The anti-wheel-lock control system has a wheel speed transducer (1), an evaluation circuit (3), and a braking pressure control device (4, 5).Particularly in commercial vehicles and at low speed, the vehicle wheel may exhibit frictional oscillations; these frictional oscillations appear as rapidly changing speed signals when sensed by the value transducer (1), which simulate sudden high wheel speed. The invention addresses the problem of eliminating these disturbances. The changes in the speed signals are physically impossible, and the disturbances are eliminated by a circuit (15, 16, 27, 28, 29) which recognizes physically impossible changes in the wheel speed by comparing the actual speed signals with a simulation threshold at which changes in speed are physically impossible.

Abstract: A testing apparatus for an anti-lock control system for vehicle brakes for testing the correct functioning of the control system. In one embodiment, the apparatus establishes a predetermined speed and compares this predetermined speed to the speed sensed by the sensing portion of the control system. When the predetermined speed is exceeded by the moving vehicle a testing apparatus is triggered which initiates a test procedure for the control system. The apparatus includes a switching device to insure that a test procedure is initiated only after the vehicle ignition switch is actuated. In another embodiment, the apparatus employs a temperature sensor and/or the control system output for initiating a test procedure, but not during a deceleration of the vehicle. In a further variant, two threshold levels are established, each of which must be encountered before the test procedure is initiated.

Abstract: An antilocking control system for the wheel brakes of a vehicle, which system includes two identically designed control units for various wheels of the vehicle and with each control unit comprising at least one wheel speed sensor, an evaluation circuit for evaluating the output signals from the sensors and for producing control signals and a brake pressure control unit responsive to the control signals from the evaluation circuit, as well as a device for testing the operability of the antilocking control system at desired time intervals. The testing device, upon receipt of a start instruction, simultaneously feeds at least one identical test signal to each of the two control units, and then compares the effect of the test signal on the two control units by comparing output signals from the two control units at given corresponding points in the two control units for at least approximate coincidence with respect to the timely occurrence and/or the magnitude of the signals and generates a control signal, e.g.

Abstract: In an antilocking control system in which wheel speed is monitored to control a braking operation in a manner to prevent locking of the braked wheels, a tendency of the wheel velocity to decrease more rapidly than a reference rate acts to reduce the brake pressure, and a subsequent tendency of the wheel velocity to increase acts to either hold constant or to gradually increase the brake pressure.

Abstract: An automatic antilock control system for vehicles comprises a sensor which determines the presence of a tendency of a wheel to lock, a brake pressure open loop control device for varying the brake pressure at the said wheel and controlled by an evaluation circuit responsive to the sensor, the evaluation circuit including switch apparatus for producing open loop control signals which achieve a steep brake presence variation during an antilock control operation and thereafter achieve a further slower pressure variation, and open loop control apparatus for varying the duration of the pressure variation in dependence on the duration of the steep pressure variation of the previous cycle.

Abstract: A method for the conversion of a constantly occurring measured value in digital form into a filtered digital value comprises comparing the instantaneous measured value with a digital value determined by previous measurements, evaluating the difference .DELTA. of the values in accordance with a predetermined function K = f (.DELTA.) and adding this evaluated value, correct with respect sign, to the said digital value determined by previous measurements.The invention also includes an arrangement suitable for carrying out this method.

Abstract: In an antilocking control system in which wheel speed is monitored to control a braking operation in a manner to prevent locking of the braked wheels, a tendency of the wheel velocity to decrease more rapidly than a reference rate acts to reduce the brake pressure, and a subsequent tendency of the wheel velocity to increase acts to either hold constant or to gradually increase the brake pressure.