Abb Technology Ag

Essity Hygiene and Health Aktiebolag

Essity Hygiene and Health Akitebola

Sca Hygiene Products Ab

Jerry Svedlund

Robert Kling

Gunilla Himmelmann

Peter Rehnström

Hans Olof Fröjd

Anders Strålin

Anders Stråhlin

Alf Brodin

Jon Lissmats

A tissue dispenser, a method, system, and a sensor unit for detecting level of a consumable tissue product () in a tissue dispenser () located in a washroom. This includes provided a sensor unit utilizing two sensor elements () each arranged to measure light reflected from a reflection field located on the tissue product, reflected directly from the tissue product, or measure the absence of the tissue product. Data from the sensor elements are wirelessly transmitted to a server () for further handling, such as for instance notification to a janitor in charge of service of the washroom.

Level sensor and dispenser

A solution for detecting level of a consumable tissue product () in a tissue dispenser () located in a washroom. This is provided in a number of aspects such as a tissue dispenser, a method, system, and a sensor unit utilizing two sensor elements (), each arranged to measure light reflected from a reflection field located on the tissue product, reflected directly from the tissue product, or measure the absence of the tissue product. Data from the sensor elements are wirelessly transmitted to a server () for further handling, such as for instance notification to a janitor in charge of service of the washroom.

A method for measuring a capacitance using a capacitance meter. The capacitance meter includes an AC power source with a controllable frequency which is fed to a capacitor to measure its capacitance. A first measurement of the capacitance is performed by the capacitance meter using a first frequency. When the first measurement of the capacitance indicates the capacitance is below a threshold capacitance a lower capacitance measurement is performed in the capacitance meter, using a second measurement of the capacitance using a second frequency. When the first measurement of the capacitance indicates the capacitance is above a threshold capacitance, a higher capacitance measurement is performed in the capacitance meter, using a second measurement of the capacitance using a third frequency, the third frequency being lower than the second frequency.

Method, capacitance meter, computer program and computer program product for improved capacitance measurement

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Hedemora, Sweden

Jerry Svedlund