Abstract: A dirt pick-up device for a floor cleaner is provided, including a carrying part fixable to the floor cleaner and a holding part releasably connectable to the carrying part with a suction strip held on the holding part, the carrying part and the holding part locked to each other by a locking device, the dirt pick-up device including an actuating element which is transferable from an unactuated position to an actuated position for transferring the locking device to an unlocked position in which the holding part is releasable from the carrying part. The dirt pick-up device can include or form a grip element held on at least one of the holding part and the suction strip, and in the unactuated position, the actuating element can be at a greater distance from the grip element than in the actuated position. A floor cleaner with a dirt pick-up device is also provided.

Abstract: A dirt pick-up device for a floor cleaner is provided, including a carrying part fixable to the floor cleaner and a holding part releasably connectable to the carrying part with a suction strip held on the holding part, the carrying part and the holding part locked to each other by a locking device, the dirt pick-up device including an actuating element which is transferable from an unactuated position to an actuated position for transferring the locking device to an unlocked position in which the holding part is releasable from the carrying part. The dirt pick-up device can include or form a grip element held on at least one of the holding part and the suction strip, and in the unactuated position, the actuating element can be at a greater distance from the grip element than in the actuated position. A floor cleaner with a dirt pick-up device is also provided.

Abstract: A floor treating apparatus is provided, including a support device, on the lower side of which there is held at least one floor treating tool, which is driven to rotate or oscillate, a handle device to guide the floor treating apparatus in at least one working position, which handle device is held on the support device so as to be pivotable about a pivot axis from the at least one working position into at least one parking position and vice versa, and a storage container for a treatment liquid. The floor treating apparatus includes a storage container receptacle, in which the storage container can be releasably positioned in the at least one working position of the handle device, and a securing device with at least one first securing member and at least one second securing member which can be moved relative thereto.

Abstract: A method for operating a sensor module having a humidity sensor for ascertaining the relative humidity, at least one first measured value for the relative humidity being ascertained with the aid of the humidity sensor. It is provided that an ambient temperature in the area of the humidity sensor is changed with the aid of a temperature control device; at least one second measured value for the relative humidity is ascertained with the aid of the humidity sensor after the change in ambient temperature in the area of the humidity sensor; and an operating state and/or a proper operation of the humidity sensor is inferred as a function of the first and second measured values.

Abstract: To determine air mass flows, especially for controlling internal combustion engines, a hot-film air-mass sensor is provided, which may be used especially for sensing air mass flows in the intake tract of an internal combustion engine. The hot-film air-mass sensor has a sensor chip having a sensor frame and a sensor diaphragm having at least one heating element and at least two temperature sensors. Furthermore, the hot-film air-mass sensor has a chip carrier for mounting the sensor chip, as well as at least one additional heating element. The sensor chip is able to be heated up using the at least one additional heating element, which is inserted into the chip carrier. Compared to the usual devices, the hot-film air-mass sensor has a lower susceptibility to contamination, especially by oil films.

Abstract: To determine air mass flows, especially for controlling internal combustion engines, a hot-film air-mass sensor is provided, which may be used especially for sensing air mass flows in the intake tract of an internal combustion engine. The hot-film air-mass sensor has a sensor chip having a sensor frame and a sensor diaphragm having at least one heating element and at least two temperature sensors. Furthermore, the hot-film air-mass sensor has a chip carrier for mounting the sensor chip, as well as at least one additional heating element. The sensor chip is able to be heated up using the at least one additional heating element, which is inserted into the chip carrier. Compared to the usual devices, the hot-film air-mass sensor has a lower susceptibility to contamination, especially by oil films.

Abstract: With devices and methods for reducing the contamination of a sensor, a sensor or sensor element—preferably a hot film air-mass meter—is deactivated when a software function integrated in the electronic control unit detects a possible contamination or a media carry-in. The sensor is deactivated using a high-side switch in the voltage supply or a low-side switch in the ground connection, wherein the media carry-in detection and the switch control are carried out by the control unit or an evaluation unit in the sensor. After the sensor is deactivated, a substitute signal is optionally generated that replaces the missing output signal of the sensor.

Abstract: The invention relates to devices and methods for reducing the contamination of a sensor with which a sensor or sensor element—preferably a hot film air-mass meter—is deactivated when a software function integrated in the electronic control unit detects a possible contamination or a media carry-in. The sensor is deactivated using a high-side switch in the voltage supply or a low-side switch in the ground connection, wherein the media carry-in detection and the switch control are carried out by the control unit or an evaluation unit in the sensor. After the sensor is deactivated, a substitute signal is optionally generated that replaces the missing output signal of the sensor.

Abstract: A method for correcting an oscillator frequency of in particular a digital transmitter/receiver interface for transmitting measurement signals of a sensor to a control unit. The method includes outputting of a first reference frequency signal by the sensor, the first reference frequency signal and comparing it with a second reference frequency signal by the control unit, calculating a correction factor on the basis of the first and second reference frequency signals, and correcting the frequency signals representing actual measured quantities subsequently sent by the sensor and received by the control unit based on the calculated correction factor to obtain corrected frequency signals.

Abstract: A measuring device, with a digital interface for the transmission of digital signals to an evaluation unit, is disclosed, whereby the interface includes a clock input, to which a system clock signal is fed, a signal input, to which a measured signal is applied, an arithmetic unit, which derives an output signal from the clock signal and measured signal, and a signal output where the output signal is output and transmitted to the evaluation unit. Measurement accuracy may be improved by transmitting a reference signal that is a signal derived from the clock signal, and using this reference signal to correct the output signal.

Abstract: A method for correcting an oscillator frequency of in particular a digital transmitter/receiver interface for transmitting measurement signals of a sensor to a control unit. The method includes outputting of a first reference frequency signal by the sensor, the first reference frequency signal and comparing it with a second reference frequency signal by the control unit, calculating a correction factor on the basis of the first and second reference frequency signals, and correcting the frequency signals representing actual measured quantities subsequently sent by the sensor and received by the control unit based on the calculated correction factor to obtain corrected frequency signals.

Abstract: A measuring device, with a digital interface for the transmission of digital signals to an evaluation unit, is disclosed, whereby the interface includes a clock input, to which a system clock signal is fed, a signal input, to which a measured signal is applied, an arithmetic unit, which derives an output signal from the clock signal and measured signal, and a signal output where the output signal is output and transmitted to the evaluation unit. Measurement accuracy may be improved by transmitting a reference signal that is a signal derived from the clock signal, and using this reference signal to correct the output signal.