Abstract: In order to guarantee reliable maintenance, a reliable energy supply and simple handling of the service cover and the vehicle air conditioner at the smallest possible structural cost, it is proposed that the service cover has electrical means, by means of which an air-treatment device arranged within the vehicle air conditioner can be supplied with the electrical energy necessary in order to operate said air-treatment device from outside the vehicle air conditioner.

Abstract: The invention relates to a sensor (1) for detecting environmental parameters, comprising a transmission device (3) by means of which an output signal of the sensor (1) can be emitted, and a correction device (4) by means of which the sensor measurement value can be corrected for the emission of a correct output signal, which sensor is to be easy to produce, and wherein only a small output is to be required for a method for calibrating a sensor of this type. According to the invention, the sensor is calibrated by means of the correction device thereof, on the basis of cloud-based data.

Abstract: An air-treatment system for motor vehicles, for example an ionizer for installation in a motor-vehicle air conditioner, has an air-treatment device by means of which air of an airflow generated by the motor-vehicle air conditioner can be treated, and has a controller by means of which the air-treatment device can be controlled in accordance with parameters of the motor-vehicle air conditioner in which the air-treatment device is installed.

Abstract: An air-conditioning system has a filter slot in which a replaceable filter can be held. An air-treatment device in the air-conditioning system can be introduced into the filter slot through a service opening of same provided in an inlet region of the filter slot and can be mounted and fixed on at least one edge delimiting the service opening of the filter slot.

Abstract: A particle-measuring system for determining particle mass concentrations in aerosols has a laser diode serving as a radiation source and projecting a beam of laser light through a flowing stream of the aerosol. A receiver for receiving the light from the diode after passing through the stream and converting the received light into a measurement. A frequency radiation output of the laser diode is modulated such that the frequency is substantially greater than a cutoff frequency of the receiver so that a specifiable radiation output of the laser diode is achieved on average over a duration of a measurement signal of the receiver.

Abstract: A sensor system for determining extension or tension in a seat belt of a seat-belt system in which the belt extends from and can be wound up on a retractor. The system has an electrical conductor extending longitudinally along the belt, a retractor for paying out and winding up the belt and the conductor thereon, and n electrode juxtaposed with the retractor. A controller connected to the conductor applies an electrical voltage to the conductor and is also connected to the electrode for detecting the voltage in the conductor.

Abstract: A particle-measuring apparatus (1) has an optical particle sensor (2, 3, 5, 6). By means of the optical particle sensor (2, 3, 5, 6) a particle mass concentration in an aerosol volume can be detected. Furthermore, the particle-measuring apparatus (1) has a measurement chamber (7), in which the aerosol volume to be examined with regard to the particle mass concentration by means of the optical particle sensor (2, 3, 5, 6) can be received, and a conveying device (11), by means of which the aerosol can be introduced into the measurement chamber (7). In order to prevent the particle-measuring apparatus (1) from being adversely affected during operation as a result of dirt or particle deposits, it is proposed that the delivery rate of the conveying device (11) of the particle-measuring apparatus (1) is adjustable.

Abstract: A particle-measuring apparatus (1) for determining the particle mass concentration in aerosols having different properties has an aerosol photometer (2), by means of which a photometer measured value, which is dependent on the particle mass concentration in the aerosol, can be measured, and an evaluation unit (9), into which photometer measured values measured by the aerosol photometer (2) can be input and in which the input photometer measured values can be processed in order to output corrected particle mass concentration values.

Abstract: A sensor system for determining extension or tension in a seat belt of a seat-belt system in which the belt extends from and can be wound up on a retractor. The system has an electrical conductor extending longitudinally along the belt, a retractor for paying out and winding up the belt and the conductor thereon, and n electrode juxtaposed with the retractor. A controller connected to the conductor applies an electrical voltage to the conductor and is also connected to the electrode for detecting the voltage in the conductor.

Abstract: A particle-measuring system for determining particle mass concentrations in aerosols has a laser diode serving as a radiation source and projecting a beam of laser light through a flowing stream of the aerosol. A receiver for receiving the light from the diode after passing through the stream and converting the received light into a measurement. A frequency radiation output of the laser diode is modulated such that the frequency is substantially greater than a cutoff frequency of the receiver so that a specifiable radiation output of the laser diode is achieved on average over a duration of a measurement signal of the receiver.

Abstract: An electrostatic sensor system is carried on two relatively movable objects between which a person can be disposed for determining the presence or absence of the person between the objects. One electrode on is one of the objects and first and second electrodes are on the other of the objects. A controller or control means applies an electrical charge to the one electrode on one object or the first and second electrodes on the other object, determines a coupling factor between the one electrode on the one object and the first electrode arranged on the other object and a coupling factor between the electrode arranged on one object and the second electrode arranged on the other object can be detected, and compares the two coupling factors with one another.

Abstract: A particle mass concentration in an aerosol volume can be detected by an optical particle sensor. In order to ensure that different degrees of contamination of the optical particle sensor can be detected by the sensor and can be taken into consideration, the optical particle sensor identifies individual particles at low particle concentrations of up to 1000 particle s/cm3.

Abstract: In order, in the case of a device for separating ultra-fine particles (UFP) from an air flow (3) which flows in motor vehicle ventilation and climate control systems (1), to ensure a higher degree of separation for said ultra-fine particles (UFP), it is proposed that the device for separation is configured as an electrostatic separation device (8), having a collecting electrode (11), on which ultra-fine particles can be accumulated which are charged in the electrostatic separation device (8) upstream in the flow direction of the air flow (3), and that the collecting electrode (11) of the electrostatic separation device (8) is arranged in relation to an evaporator (5) of the motor vehicle ventilation and climate control system (1) in such a way that the collecting electrode (11) can be cleaned automatically by means of condensation water which is produced on the evaporator (5).

Abstract: A particle-measuring apparatus (1) has an optical particle sensor (2, 3, 5, 6). By means of the optical particle sensor (2, 3, 5, 6) a particle mass concentration in an aerosol volume can be detected. Furthermore, the particle-measuring apparatus (1) has a measurement chamber (7), in which the aerosol volume to be examined with regard to the particle mass concentration by means of the optical particle sensor (2, 3, 5, 6) can be received, and a conveying device (11), by means of which the aerosol can be introduced into the measurement chamber (7). In order to prevent the particle-measuring apparatus (1) from being adversely affected during operation as a result of dirt or particle deposits, it is proposed that the delivery rate of the conveying device (11) of the particle-measuring apparatus (1) is adjustable.

Abstract: A particle-measuring apparatus (1) for determining the particle mass concentration in aerosols having different properties has an aerosol photometer (2), by means of which a photometer measured value, which is dependent on the particle mass concentration in the aerosol, can be measured, and an evaluation unit (9), into which photometer measured values measured by the aerosol photometer (2) can be input and in which the input photometer measured values can be processed in order to output corrected particle mass concentration values.

Abstract: A particle mass concentration in an aerosol volume can be detected by means of an optical particle sensor (1). In order to ensure that different degrees of contamination of the optical particle sensor (1) can be detected by means of said sensor and can be taken into consideration, the optical particle sensor (1) has a means (10) for identifying individual particles at low particle concentrations, for example up to 1000 particles/cm3.

Abstract: An electrostatic sensor system is carried on two relatively movable objects between which a person can be disposed for determining the presence or absence of the person between the objects. One electrode on is one of the objects and first and second electrodes are on the other of the objects. A controller or control means applies an electrical charge to the one electrode on one object or the first and second electrodes on the other object, determines a coupling factor between the one electrode on the one object and the first electrode arranged on the other object and a coupling factor between the electrode arranged on one object and the second electrode arranged on the other object can be detected, and compares the two coupling factors with one another.

Abstract: A sensor arrangement for determining the CO2 concentration in an interior space has an NDIR sensor unit that can determine the number of CO2 molecules on an optical measuring section and therefrom the CO2 concentration in an interior space. The sensor arrangement further has an evaluation unit that can calculate the air pressure from measurement values of the NDIR sensor unit and that can carry out an air-pressure compensation on the basis of the value calculated for the air pressure or of an air pressure correction value calculated therefrom for the measurement value of the CO2 concentration determined by the NDIR sensor unit.

Abstract: An ionizer for charging air in a motor vehicle with negative ions. The ionizer has an emitter with a pair of spaced electrodes, a high-voltage power supply, means connecting the power supply to the electrodes to apply a voltage differential across them and thereby ionize gas molecules adjacent the electrodes, and a sensor between the power supply and the electrodes for measuring current passing between the electrodes.

Abstract: A gas-sensor arrangement for measuring a target-gas concentration has first and second NDIR emitters to one side of a space containing the target gas and projecting respective first and second beams of infrared light through the space. An it receiver on the other side of the space and irradiated by the first and second beams for emitting first and second outputs respectively corresponding to the first and second beams and together forming a receiver signal corresponding to radiation received from the first and second beams. One of the emitters is optically farther from the receiver than the other of the emitters. A filter between the receiver and the space is traversed by the first and second beams and permeable only to radiation of a wavelength range corresponding to the target gas. A controller connected to the radiation receiver calculates the target-gas concentration on the basis of the receiver signal.