A vacuum cleaner that includes a surface cleaning head including a dirty air inlet, a brush supported by the surface cleaning head, a motor coupled to and operable to cause movement of the brush, a sensor to sense a voltage associated with a current of the motor, and a controller configured to control an amount of current provided to the motor in response to the sensed voltage. The controller is configured to control a first pulse width modulated (PWM) duty cycle provided to the motor when the sensed voltage is less than a reference voltage, control a second PWM duty cycle provided to the motor when the sensed voltage is greater than the reference voltage, the second PWM duty cycle being less than the first PWM duty cycle, and turn off the motor when the sensed voltage increases to a voltage associated with an overload current of the motor.

A vacuum cleaner that includes a surface cleaning head including a dirty air inlet, a brush supported by the surface cleaning head, a motor coupled to and operable to cause movement of the brush, a sensor to sense a voltage associated with a current of the motor, and a controller configured to control an amount of current provided to the motor in response to the sensed voltage. The controller is configured to control a first pulse width modulated (PWM) duty cycle provided to the motor when the sensed voltage is less than a reference voltage, control a second PWM duty cycle provided to the motor when the sensed voltage is greater than the reference voltage, the second PWM duty cycle being less than the first PWM duty cycle, and turn off the motor when the sensed voltage increases to a voltage associated with an overload current of the motor.

A combination for performing work in a household environment includes a device with a performance unit for performing the work, a moving apparatus for moving the device on a surface, a control unit for controlling the moving apparatus for autonomous maneuvering on the surface, and a visualization component, wherein the visualization component includes a two-dimensional or three-dimensional visualization element in a shape of a human, an animal, a plant, a household object, a fantasy figure, a moving apparatus, in particular a vehicle, an airplane, or a ship, and wherein the visualization element is at least partially formed by a light projection and/or as an inflatable unit.

A combination for performing work in a household environment includes a device with a performance unit for performing the work, a moving apparatus for moving the device on a surface, a control unit for controlling the moving apparatus for autonomous maneuvering on the surface, and a visualization component, wherein the visualization component includes a two-dimensional or three-dimensional visualization element in a shape of a human, an animal, a plant, a household object, a fantasy figure, a moving apparatus, in particular a vehicle, an airplane, or a ship, and wherein the visualization element is at least partially formed by a light projection and/or as an inflatable unit.

The present disclosure provides a surface cleaning apparatus with a housing, a nozzle cover attached to the housing, a headlight, and a nozzle cover sensing mechanism. The nozzle cover sensing mechanism can determine whether the nozzle cover is present on the housing, and the headlight can accordingly be deactivated. Methods for operating the nozzle cover sensing mechanism are also disclosed.

The present disclosure provides a surface cleaning apparatus that includes a headlight or other light source that selectively illuminates upon the occurrence of a predetermined condition. The headlight turns on to emit light when the surface cleaning apparatus us turned on, and emits light in a different color when cleaning fluid is dispensed. Methods for operating a headlight or light source are also disclosed.

The present disclosure provides a surface cleaning apparatus that includes a headlight or other light source that selectively illuminates upon the occurrence of a predetermined condition. The headlight turns on to emit light when the surface cleaning apparatus us turned on, and emits light in a different color when cleaning fluid is dispensed. Methods for operating a headlight or light source are also disclosed.

The improved mobile robot utilizes a cooperative wheeled support arrangement having a unique axle design that preferably cooperates with a base support module. A tri-axle is preferably used to support at least one omni-wheel on each axle section. Multiple omni-wheels on each section can be used for higher load applications. The tri-axle is of a fixed design and each wheel pivots on the individual axle section. Preferably, the axle sections are welded to each other.

The improved mobile robot utilizes a cooperative wheeled support arrangement having a unique axle design that preferably cooperates with a base support module. A tri-axle is preferably used to support at least one omni-wheel on each axle section. Multiple omni-wheels on each section can be used for higher load applications. The tri-axle is of a fixed design and each wheel pivots on the individual axle section. Preferably, the axle sections are welded to each other.

The present disclosure provides a detection system whereby a virus or the like can be effectively detected in order to suppress the spread of infectious disease by the virus or the like. The detection system according to the present disclosure includes an autonomous collection device that is capable of moving on a floor surface and for collecting an object on the floor surface, and a station device for detecting an analyte from the object collected from the floor surface by the autonomous collection device. The autonomous collection device includes a moving part for moving on the floor surface, a primary electric blower for sucking the object on the floor surface, and a dust container for storing the sucked object. The station device includes a transfer pipe fluidically connected to the dust container of the autonomous collection device when the autonomous collection device is positioned in a home position, and a virus detection part for detecting the analyte from the object transferred from the dust container through the transfer pipe.