Abstract:
The invention described in an arrangement and a method for imaging and/or measuring tissue qualities, such as tissue thickness, tissue surface roughness and degree of tissue fiber linearization. The arrangement comprises at least one light generating means (8, 14, 15), at least one light detecting means (5, 20), a probe (1) with an extension (3), and possibly a control apparatus (6) including a signal processor (13) for processing the detected signals and/or images according to described procedures. Said extension (3) is designed to convey light from said light generating means (8, 14, 15) to said tissue for visualization and/or measurement, possibly using at least one fiber bundle (7, 17). Said extension (3) is also designed to convey light back-scattered from said tissue to said light detecting means (5, 20), possibly using at least one fiber bundle (19). Said detecting means (5, 20) is designed to measure the intensity and/or spatial distribution of light back-scattered from said tissue. The arrangement utilizes a new principle for tissue thickness assessment, based on the differences in absorption spectrum between tissue components, and a new principle for tissue fiber linearization assessment, based on differences in polarized light transport between linearized and non-linearized tissue.
Abstract:
The invention refers to a method and an apparatus which in situ measure the flow in a blood vessel mean (9). A local disturbance of the optical properties of the blood is performed at the measuring place. The disturbance is optically detected by means of an optical conduit (1) introduced into the vessel, the field of view of the conduit being directed towards the central portion of the vessel. The detected optical signal is used to form a measure of the flow. The device comprises a conduit introduced into the vessel up to the measuring place. A fibre optical light conductor (7) is provided within the conduit. According to the invention the end surface of the light conductor is bevelled to look into the central portion of the blood vessel. A light detector (7) is provided in the proximal end of the light conductor and detects the local disturbance of the optical properties of the blood. The disturbance may be brought about by introducing a fluorescent substance into the blood or by making use of the autofluorescence of the blood. Disturbances may also be brought about by locally producing microbubbles in the blood upstreams of the measuring position or by locally disturbing the orientation of the blood corpuscles.
Abstract:
Device for measuring physical properties of the tympanic membrane (TM), comprising an elongated probe (12) with a distal end (15) for inspection of the ear, wherein a plurality of optical fibres is arranged in said elongated probe. The plurality of fibres includes either a first set of fibres (21) for conveying light from a light source to said distal end of said probe and a second set of fibres (22) for conveying light reflected from the tympanic membrane in front of said distal end to a first detector means (23) or a set of fibres both for conveying light from a light source to said distal end of said probe and for conveying light reflected from the tympanic membrane in front of said distal end to a first detector means (23). Said first detector means (23) is designed for measuring the intensity of light reflected from the tympanic membrane. Method for measuring physical properties of the tympanic membrane (TM), including the following steps: a) illuminating the tympanic membrane with light from a light source, b) detecting light reflected from the tympanic membrane, and c) analysing the intensity at selected wavelengths or a spectrum of wavelengths.
Abstract:
The invention describes asealing system comprising a rotary sealing surface (3) on a rotary shaft (1) and a rotary shaft lip seal (5), of which the rotary sealing surface has a surface coating layer (9) of a solid lubricant substance. The invention further comprises an industrial robot having several axes of rotation, comprising a manipulator with drive units for rotating robot parts according to the axes of rotation of the robot, and at least one of said drive units having a rotary shaft (1) provided with sucha sealing system. In addition, the invention comprises a method for providing a rotary sealing surface (3) on a rotary shaft (1), comprising coating the intended sealing surface of the rotary shaft with a surface coating layer (9) of a solid lubricant substance.
Abstract:
The present invention relates to an electrical contact element for providing electrical contact in an electrical circuit, where the contact element includes a Me- 16/17 compound acting as a lubricant of at least part of at least one contact surface of the contact element, a Me- 16/17 compound being a compound formed by at least one metal and an element from group 16 or 17 of the periodic table. At least part of at least one contact surface is formed from a Me-16/17 compound composite material comprising a matrix of a metallically conducting material and particles formed from a Me-16/17 compound. By using a Me-16/17 compound composite material as a surface material, a contact surface of high durability and low, stable contact resistance can be achieved. The matrix of the composite material ensures good conductivity, so that a composite material thickness which ensures desirable durability properties can be provided, while keeping the contact resistance within acceptable limits.
Abstract:
A bulk electrically conductive member (4, 5) for an electric device, such as an electric contact or an electric conductor, said member (4, 5) comprising a nanocomposite material having a matrix (2) and crystallites (3) of nano-size, i.e. here defined as having a size in the range of 1 -200 nm in at least two dimensions, embedded therein, portions of said matrix (2) separating adjacent said crystallites (3) of said nanocomposite material have a thickness (T) providing said matrix (2) and hence said member (4, 5) with an electrical conductivity determined by a substantially two-dimensional character of said matrix (2), such as for so-called pseudo-2D materials like graphene.
Abstract:
An electric contact element (1,12) for an arcing contact (2,7) comprising a contact body (3,13) arranged to be applied against a second contact element (4,15), where the contact body comprises a M n + 1 AX n - material, wherein M is at least one transition metal, A is at least one element selected from group 13-17 in the periodic table, X is C and/or N, and n is 1,2,3 or higher. A method of making a contact element comprising a contact body comprising a M n+1 AX n -material. Use of an electric contact element comprising a contact body comprising a M n+1 AX n -material in an arcing contact.
Abstract:
A pulse-frequency analyzing monitor which is provided with an optical sensor and which is intended for measuring photoplethysmographically the blood circulation of a subject, such as a body part of a human being or an animal, includes a light source, preferably a light-emitting diode for infrared light, fibre optics, a detector unit for detecting the alternating voltage, or AC-component of a generated PPG-signal for the purpose of determining the heart frequency of the subject, an electronic amplifying unit and a presentation unit, for instance an oscilloscope of a display unit. The apparatus also includes means for separating from the detected PPG-signal a signal component which indicates the respiration frequency of the subject. The PPG-signal is coupled to a filter, preferably a digital filter, which enables limit frequencies and the degree of amplification to be set. The digital filter may be a component of a microprocessor which is able to eliminate disturbances, for instance disturbances emanating from 50 Hz stray light, in addition to separating signals concerning the heart and respiration frequency of the subjet. The invention also relates to a method of carrying out such photoplethysomographic measuring processes.
Abstract:
A mechanical switch in the form of a bypass switch assembly is arranged between two electrical conductors (busbars) and stays open during normal operation. When a cell fault happens, the fault and bypass information is transmitted to an actuator (acting as a trigger circuit) which activates inter alia a gas generator producing huge volume of gas in a very short time. The gas pressure pushes a movable member to bridge the two electrical conductors with ultrafast speed.
Abstract:
Device for measuring physical properties of the tympanic membrane (TM), comprising an elongated probe (12) with a distal end (15) for inspection of the ear, wherein a plurality of optical fibres is arranged in said elongated probe. Said first detector means (23) is designed for measuring the intensity of light reflected from the tympanic membrane.The device also comprises means for producing a pressure provocation of the tympanic membrane and means for analysing the mobility of the tympanic membrane during provocation.