摘要:
A stress-measuring device (10) and method determines a level (15) of stress of a user (1), in particular long-term stress. The stress-measuring device (10) includes an input interface (12) for receiving a skin conductance signal (11) indicating the skin conductance of the user (1), the skin conductance signal (11) over time forming skin conductance trace data (13). The stress-measuring device (10) further includes a processing unit (14) for processing the skin conductance trace data (13). The processing unit (14) determines, over at least a portion of the skin conductance trace data (13), values of a rise time (tr) between at least two different points of the skin conductance trace data (13), a frequency distribution of the rise time (tr) values, and the level (15) of stress of the user (1) based on the determined frequency distribution.
摘要:
A device (1) for determining a stress related condition of a person and providing feedback about this condition comprises body sensors (20) for detecting stress related body parameters, a stress assessing element (40), and a feedback device, wherein the stress assessing element (40) is designed for processing input provided by the body sensors (20) and for determining control parameters for controlling the feedback device, on the basis of the input provided by the body sensors (20). The body sensors (20) are integrated in a textile structure, so that the tested person does not sense the sensors (20), as a result of which there is no chance that the test results get influenced by an interaction between the device (1) and the person.
摘要:
The present invention relates to a stress-measuring device (10) and method for determining a level (15) of stress of a user (1), in particular long-term stress. The stress-measuring device (10) comprises an input interface (12) for receiving a skin conductance signal (11) indicating the skin conductance of the user (1), the skin conductance signal (11) over time forming skin conductance trace data (13). The stress-measuring device (10) further comprises a processing unit (14) for processing the skin conductance trace data (13), the processing unit (14) adapted to determine, over at least a portion of the skin conductance trace data (13), values of a rise time (tr) between at least two different points of the skin conductance trace data (13), to determine a frequency distribution of the rise time (tr) values, and to determine the level (15) of stress of the user (1) based on the determined frequency distribution.
摘要:
A description is given of a switching device (1) comprising a transparent substrate (3), a switching film (5) comprising a hydride of scandium and magnesium, covered with a palladium layer (7). By exchange of hydrogen, the switching film can be reversibly switched from a transparent state to a mirror-like state with zero transmission via an intermediate black absorbing state. The conversion between both states is reversible, and this phenomenon can be used, for example, in an optical switching element or sun roof.
摘要:
Transflective display device having a transflector (10) which is switchable between a transparent state and a mirror-like state. Preferably, a metal hydride optical switch is used as the transflector.
摘要:
The physiological condition of a person is determined in physiological condition determining system by using a sensor for sampling a plurality of heart beats of the person, and using a control unit to perform the acts of: extracting a series of cardiac R-R intervals from the heart beat samples, providing a two-dimensional representation of subsequent R-R intervals, wherein two subsequent R-R interval forms an entry in the two-dimensional representation resulting in a plurality of entries, determining a centroid, an average radius and an average rotation frequency for the plurality of entries in the two-dimensional representation, determining a plurality of distances between the radius and each of the entries in the two-dimensional representation, and determining the physiological condition of the person using the radius in combination with the plurality of distances.
摘要:
The invention relates to a valve for opening and closing a channel (3) of a microfluidic system, respectively. According to the invention, the valve comprises an actuation medium (2) that undergoes a volume change with changing temperature; and a heater arrangement (5) for generating a temperature gradient in the actuation medium (2) with respect to the actuation medium's (2) distance relative to the channel (3); wherein due to an expansion or a contraction of the actuation medium (2) the channel (3) is closed or opened, respectively. When the heater arrangement (5) is activated in such a way that a higher temperature is generated in the actuation medium (2) which is nearer to the channel (3) and a lower temperature is generated in the actuation medium (2) which is further away from the channel (3) the valve can be closed and vice versa. Accordingly, such a valve for a microfluidic system is provided which can be reliably actuated during a long time of use.
摘要:
A wireless die (2) comprises an orientation detector (4) for determining an orientation of the die (2) and a transmitter (5) connected to the orientation detector (4) for transmitting die (2) orientation data to the receiver (3). The orientation detector (4) comprises at least two electromechanical detectors (6), the electromechanical detectors (6) being arranged for generating electrical power for the orientation detector (4) and transmitter (5), and for supplying gravity based orientation data.
摘要:
A body parameter sensing arrangement comprising clothing (10) and a plurality of sensors (12, 20) for sensing body signals, located at mutually movable relative positions in the clothing (10). Processing circuit (26) coupled to the plurality of sensors (12, 20), is configured to identify selected ones of the sensors (12, 20) that carry valid body signals. The identification by clustering the sensors (12, 20) according to similarity between signals from the sensors (12, 20). A cluster of sensors (12, 20) is determined with a maximal count of sensors (12, 20) within a minimal cluster diameter A cluster diameter defined by a measure of similarity or distance between signals form the sensors is used. The cluster is used to select sensors (12, 20) to identify the selected ones of the sensors (12, 20) that carries valid body signals on the basis of membership of the cluster
摘要:
The present invention relates to an electronic device (1) which comprises a modular housing (2) comprising a plurality of stacked housing parts (4, 6) that are mechanically interconnected by connection means (8, 10), and which comprises electronic parts (16, 26) having contact portions (30, 32) for providing electrical contact between the parts, a housing part adapted to accommodate an electronic part and having contact members for providing electrical contact between the parts, which contact members comprise conductive tracks (12) provided on a first surface (14), wherein the contact members comprise conductive tracks (18) provided on a second surface (20), the tracks on the second surface of a housing part are electrically connected to the tracks on the first surface of said housing part, and the second surface faces towards the first surface of a next housing part when connected to the housing. The invention further relates to a housing part for assembling a modular housing accommodating electronic parts and to a method of manufacturing such a housing part.