Abstract: A mechanism by which a MEMS gyroscope sensor can be calibrated using data gathered from other sensors in a system incorporating the MEMS gyroscope sensor is provided. Data gathered from an accelerometer and a magnetometer in fixed orientation relative to the gyroscope is used to calculate changes in orientation of a system. A constant acceleration vector measured by the accelerometer and a constant magnetic vector measured by the magnetometer are used as reference vectors in a solution to Wahba's problem to calculate a rotation matrix providing the system's orientation with respect to those two constant vectors. By comparing changes in orientation from one time to a next time, measured rates of angular change can be calculated. The measured rates of angular change can be used along with observed gyroscope rates of angular change as input to a linear regression algorithm, which can be used to compute gyroscope trim parameters.

Abstract: A friction testing positioning device (10) comprises a first wheel (12) rotatably mounted around a first axis (14) at a first end section of a transmission arm (16), said transmission arm (16) being pivotably mounted around a second axis (18), at least one second wheel (20) rotatably mounted around a third axis (22) at a second end of said transmission arm (16) and a transmission means (24) connecting said first axis (14) and said third axis (22), wherein said at least one second wheel (20) engages a substructure (26) and said first wheel (12) and said at least one second wheel (20) are being arranged to rotate at different speeds of rotation. A first vertically adjustable displacement means (28) operates on said transmission arm (16) to rotate around said second axis (18) and to press said first wheel (12) into engagement with said substructure at a substantially constant vertical force.

Abstract: The present invention provides a method for determining at least one evaluation parameter of a blood sample, comprising the following steps: providing (S4) at least one blood gas parameter; providing (S5) at least one hemostasis parameter; and determining (S6 . . . S10?) the at least one evaluation parameter as a function of the blood gas parameter and/or the hemostasis parameter.

Abstract: A device for the gas analysis of a gas mixture includes a converter configured to convert a first gas component into a target gas component, a sensor system configured to detect the target gas component or another component of the gas mixture after the conversion by the converter, and an evaluating apparatus. The converter is further configured to change the concentration of a second gas component or to cause a conversion to a second target gas component. The sensor system is configured to determine the concentration of the second gas component or of the second target gas component. The evaluating apparatus is configured to determine a value for the aging of the converter on the basis of the concentration of the second gas component or of the second target gas component.

Abstract: In order to make it possible to sensitively detect adsorptive gas even in the presence of a small amount of contamination that significantly influences adsorptive gas measurement, a gas injecting mechanism that injects adsorptive injection gas into a flow path through which sample gas is flowed, a gas measuring mechanism that can measure a value related to quantity of the adsorptive gas flowing through the flow path, and a contamination determining part that determines contamination in the flow path on the basis of a value related to a measurement response speed of the gas measuring mechanism to the adsorptive gas are provided.

Abstract: In one example, a sample gas analyzer includes a sample cell configured to receive a gas sample, a sample tube including a passageway that is in communication with the sample cell, and an intake portion. A cleaning element is disposed between, and arranged for fluid communication with, the sample tube and the sample cell, and includes a body having a chamber configured to aid in imparting a rotational motion to a fluid stream entering the chamber. The cleaning element also includes an inlet port that is in communication with the chamber and that is configured and arranged for communication with the atmosphere. Finally, the cleaning element includes an outlet port in communication with the chamber and the sample cell.

Abstract: A method includes providing at least one filter element in a test rig. The at least one filter element separates a clean side from a dirty side within the test rig. The pressure differential between the clean side and the dirty side is measured. The pressure differential between the clean side and the dirty side is increased by filtering particulate matter and fluid from an air flow within the test rig. The at least one filter element is cleaned. The previous three steps are repeated to replicate the conditions the at least one filter element is subjected to during substantially the entire life cycle of the at least one filter element.

Abstract: A rheometer includes a drive shaft, a drag cup motor for rotating the drive shaft, a first measuring object supported by the drive shaft, a second measuring object, a linear position sensor, and processing and control electronics. The linear position sensor includes a target (e.g., an aluminum target) mounted to the drive shaft, and a pair of coils. The linear position sensor is configured to measure thermal expansion of the drive shaft based on a change in impedance of the coils resulting from a displacement of the target relative to the coils. The processing and control electronics are in communication with the coils and are configured to adjust a position of one of the measuring objects relative to the other based on a change in impedance of the coils resulting from a displacement of the target relative to the coils, thereby to maintain a substantially constant measurement gap therebetween.

Abstract: A method of evaluating a gradient of a composition of materials in a petroleum reservoir, comprising sampling fluids from a well in the petroleum reservoir in a logging operation, measuring an amount of contamination in the sampled fluids, measuring the composition of the sampling fluids using a downhole fluid analysis, measuring an asphaltene content of the sampling fluids at different depths; and fitting the asphaltene content of the sampling fluids at the different depths to a simplified equation of state during the logging operation to determine the gradient of the composition of the materials in the petroleum reservoir.

Abstract: Systems and methods for determining concentrations of components of a multiphase fluid. A first flowmeter receives a fluid flow and generates measurements of the fluid flow. After at least partially separating the fluid flow into mixtures of its components, second and third flowmeters generate measurements of the mixtures. A data processing apparatus operatively coupled to the flowmeters receives the measurements and determines concentrations of the components of the fluid flow. In an embodiment, the measurements are mass flow and density readings.

Abstract: A composite bonded structure with integral stress sensing and bond evaluation system incorporates a bonded structure having a first component, a second component and a layer of adhesive bonding the first and second components. The layer of adhesive includes multiple embedded fluorescing particles which emit a first spectral intensity in an unstressed condition and a second spectral intensity in a stressed condition. A bond evaluation apparatus is then employed for measuring spectral intensity.

Abstract: A well flow velocity measurement method can include transmitting an acoustic signal through at least one fluid composition in a well, detecting velocities of the acoustic signal in both opposite directions along an optical waveguide in the well, the optical waveguide being included in a distributed acoustic sensing system, and determining an acoustic velocity in the fluid composition based on the velocities of the acoustic signal. Another well flow velocity measurement method can include propagating at least one pressure pulse through at least one fluid composition in a well, detecting a velocity of the pressure pulse along an optical waveguide in the well, the optical waveguide being included in a distributed acoustic sensing system, and determining an acoustic velocity in the fluid composition based on the velocity of the pressure pulse.

Abstract: An exemplary embodiment of the liner top test tool comprises a mandrel that is coupled to a sealing assembly, which contains at least one radially extendable sealing element, and a test tool support which is axially displaceable in relation to the mandrel. The test tool support contains at least one shearable element preventing axial movement of the test tool support in relation to the mandrel. The mandrel has at least one axial groove that can be coupled to the test tool support in order to limit the amount of axial movement between the two components. Once the tool is in place on a liner top, the shearing of the shearable element will activate the tool by allowing the mandrel to be displaced axially in relation to the test tool support thereby applying axial pressure on the sealing element causing it to radially extend and seal the bore of the liner.

Abstract: The present invention relates to a downhole tool (1) for determining laterals in a borehole wall (3) or a borehole casing (4), comprising a tool housing (5) extending along a longitudinal axis (6) and having a circumference perpendicular to the longitudinal axis and adapted to be lowered into a well, and a plurality of sonic transceivers (7), each sonic transceiver transmitting sonic signals (8) from the housing and receiving sonic signals reflected from the borehole wall or borehole casing in a pre-defined angular segment (9), wherein the plurality of sonic transceivers are arranged along the circumference of the tool housing having a mutual distance and are capable of transmitting sonic signals radially away from the tool housing in an entire central angle of 360 degrees towards the borehole wall or borehole casing and wherein, during use, one sonic transceiver, during a pulse time, transmits a sonic signal in the predefined angular segment of that sonic transmitter, and wherein one sonic transceiver, durin

Abstract: A method of operation analysis of operation of a plurality of sump pumps located at various, separate locations. A plurality of sensors are respectively associated therewith. Each sensor sensing at least one operation condition. A plurality of location communication devices are respectively associated therewith. A master communicating device is located away from the separate locations. The communicated information is received at the master communicating device. The received communicated information is stored in memory. At least one benchmark value is determined concerning an operating condition utilizing the received information for each of the plurality of sump pumps. The received information for each of the sump pumps is compared to the benchmark value. Each sump pumps based is classified based upon each respective comparison.

Abstract: The present invention refers to a sensor device and associated method of locking sensor device components. In some aspects of the invention, a housing assembly comprises a housing case for an exhaust gas temperature probe sensor device that can be used to lock one or more traversing studs and form an environmental seal using a plurality of insulators and a fastener locked onto the elongated body of each of the studs. The locking features of the housing case and locking part geometry can function to securely hold and align parts when the fastener is locked into place. The fastener can be a press fit bushing with a bushing weld.

Abstract: A piezoelectric device includes: a piezoelectric vibrating reed; and a package, wherein the piezoelectric vibrating reed has a vibrating part and first and second supporting arms extending from a base end part, the package has a base, a lid, a cavity defined by the base and the lid, a convex part projecting from the base or the lid into the cavity, a length of the first supporting arm is shorter than a length of the second supporting arm, and the convex part is provided in a range ahead of a leading end of the first vibrating arm in an extension direction of the first supporting arm and at least partially overlapping with the second supporting arm in a length direction of the piezoelectric vibrating reed so as not to overlap with the piezoelectric vibrating reed in a plan view.

Abstract: A sensor having at least one sensor element (1), at least one signal processing element (2), and a housing (7) which has at least one fastening means. An electrical interface is provided for electrically connecting the sensor. The sensor has an electrically and mechanically connecting carrier means (4) on which the at least one sensor element (1) and the signal processing element (2) are arranged and are electrically connected to the carrier means. The carrier means (4) is also at least electrically connected to the electrical interface.

Abstract: A laser source unit obtains Q switch pulse oscillation with a simple structure while continuously switching a plurality of wavelengths. A laser source unit emits pulsed laser beams with a plurality of different wavelengths. A flash lamp radiates excitation light to a laser rod. A pair of mirrors face each other with the laser rod interposed therebetween. The pair of mirrors form an optical resonator. Wavelength selection unit controls the wavelength of light which resonates in the optical resonator to any one of a plurality of wavelengths to be emitted by the laser source unit. Driving unit drives the wavelength selection unit such that the optical resonator performs the Q switch pulse oscillation.

Abstract: A method and apparatus for processing measurements of an acoustic wave, the acoustic wave being within a member (12) made of a composite material and caused by an impact to the member (12), the method comprising: analysing the measurements to detect an initial acoustic wave feature; analysing the measurements to detect the presence of further acoustic wave features, the further features occurring after the initial feature; if there are no further acoustic wave features, determining that the impact to the member (12) has not changed the structure of the member (12); if there are further features, determining a value of a function of the further acoustic wave features; if the determined value satisfies certain criteria, determining that the impact has changed the structure of the member (12); and if the determined value does not satisfy the criteria, determining that the impact has not changed the structure of the member (12).

Abstract: An ultrasonic sensor assembly for testing a pipe includes a first and second transducer rings attached to the pipe and spaced apart along a length of the pipe. The first transducer ring includes a plurality of transmitters for transmitting a wave, such as a non-dispersive guided wave. The first transducer ring transmits the wave along the pipe. The second transducer ring includes a plurality of receivers for receiving the wave. A relative position of the first transducer ring with respect to a circumferential position of the second transducer ring is determined based on characteristics of the wave received by the second transducer ring. A method of positioning the ultrasonic sensor assembly on the pipe is also provided.

Abstract: An array probe 3 is provided with an array probe body 32 having a plurality of transducers 31 linearly arranged. The array probe is provided with a vibration insulating member 4 that is installed onto a transducer surface 33 to absorb the vibrations of the transducer surface, and an installation frame 5 for installing the vibration insulating member. The vibration insulating member has an opening part 41, and the width dimension of the opening part is smaller than the width dimension of the transducer surface. By installing the vibration insulating member having the opening width dimension corresponding to the distance from a test object surface of a target flaw onto the transducer surface, ultrasonic testing is performed, whereby even for a flaw near the surface, flaw echo is made less liable to be buried in surface echo, and the flaw can be detected easily.

Abstract: An apparatus for testing a test specimen, the apparatus comprising a first fixture comprising a first mounting filament tensionably secured thereto, a second fixture comprising a second mounting filament tensionably secured thereto, and a vibratory energy source adapted to apply vibrational energy to the test specimen. In use the test specimen is mounted to the first and second mounting filaments so that each of the first and second mounting filaments is aligned with a nodal line on the test specimen.

Abstract: A vibrator-mounted holder is attached to a casing of a vibration generator which moves a vibrator to generate a vibration when used. The vibrator-mounted holder includes a vibrator, a vibrator retention unit retaining the vibrator, a fixing unit fixed to a casing, and an arm. The vibrator includes a magnet having a plate shape parallel to a horizontal surface and a yoke arranged on the magnet. The arm connects the fixing unit to the vibrator retention unit, and supports the vibrator retention unit in a manner that the vibrator retention unit is displaceable with respect to the fixing unit. The yoke has a projecting portion which is projected downward and fixed to the vibrator retention unit. The arm is connected to a portion, at which the projecting portion is arranged, within the vibrator retention units.

Abstract: An optical sensor is disclosed for measuring pressure and/or temperature. The optical sensor is adapted for use in high temperature environments, such as gas turbines and other engines. The optical sensor comprises an optical assembly having a sensor element, a spacer and a lens arranged along the optical axis. The sensor element is spaced from the lens by the spacer. An optical fibre is coupled to the optical assembly for illuminating the sensor element. The optical assembly is resiliently mounted in a housing such that the optical assembly is insulated from shock to the housing. There is also disclosed a method of assembling the optical sensor.

Abstract: A system and method detect the presence of an unacceptable quantity of gas molecules in the reference vacuum cavity of a capacitance diaphragm gauge (CDG). An independent pressure transducer has an active portion exposed to the reference vacuum cavity. The transducer includes a ring anode, a cylindrical inner wall surface that forms at least one cathode, and a magnet positioned with respect to the ring anode such that the magnetic flux of the magnet is generally aligned with the central axis of the ring anode. A high voltage source applies a voltage between the ring anode and the cathode. A current sensor senses a magnitude of any current flowing between the ring anode and the cathode via ionized gas molecules. A monitoring unit monitors the magnitude of the current sensed by the current sensor and activates an alarm when the magnitude of the current exceeds an acceptable magnitude.

Abstract: In a fluid pressure sensor with a pressure sensing membrane and an electronic circuit, the electronic circuit is in a section realized so thin that a membrane is formed in this section of the electronic circuit. In the other sections, the electronic circuit is realized thicker than in the section that forms the membrane. This makes it possible to manufacture a particularly compact fluid pressure sensor.

Abstract: In one embodiment, an apparatus, includes: a mandrel; an expansion cylinder, comprising: opposite first and second ends; an inner circumferential surface extending between the ends and characterized by an inner diameter, the inner circumferential surface defining a hollow cavity; an outer circumferential surface extending between the ends and characterized by an outer diameter that is greater than the inner diameter; and a plurality of slots extending from the inner circumferential surface to the outer circumferential surface and latitudinally oriented between the ends; and one or more base plates configured to engage one of the ends of the expansion cylinder. In another embodiment, a method includes: arranging an expansion cylinder inside a test cylinder; arranging a mandrel inside the expansion cylinder; applying a force to the mandrel for exerting a radial force on the expansion cylinder; and detecting one or more indicia of structural failure of the test cylinder.

Abstract: An L-shaped sealing ring comprising two legs connected with one another to form an L-shape in cross section. A length of a first leg is part of a lateral surface of revolution about an axis of the L-shaped sealing ring. The first leg lies between the first length and the axis of revolution. A second leg is bounded toward the environment by a second length, wherein the first and second lengths are connected with one another via a connection contour. An intersection of first and second lines, forms a corner of a triangle, wherein the respective end points of the first and second lengths form other vertices of the triangle. The L-shaped sealing ring is so embodied that the surface area of the cross sectional area of the body of the L-shaped sealing ring in the triangle amounts to, at most, 60% of the areal content of the triangle, wherein the area of the L-shaped sealing ring in the triangle is non-concave.

Abstract: A method for operating an ultrasonic device comprising a first and second ultrasonic transducers, includes driving the first and second transducers at a driving frequency such that the first and second transducers generate a first and a second signals, respectively. The method also includes sensing the second signal at the first transducer to produce a first measurement signal and sensing the first signal at the second transducer to produce a second measurement signal. The method further includes identifying a first set of data-points in the first measurement signal and a second set of data-points in the second measurement signal. The method also includes generating a frequency data-series using the first set of data-points and a corresponding data-point in the second set of data-points. The method also includes performing statistical operations based on the frequency data-series and configuring an operating frequency for driving the first and second transducers using the operations.

Abstract: A detection unit includes a sensor that detects the presence of force and a force component separation mechanism that separates the magnitude and the direction of the force and a control unit that controls the detection action of the force component separation mechanism based on the detection result of the sensor.

Abstract: A pressure sensor including: a MEMS resonator; a sweeping unit which sweeps a frequency of an excitation signal in a predetermined direction of sweeping, over a predetermined frequency range including a resonance frequency f0 of a vibrator in the MEMS resonator, while outputting the excitation signal to the MEMS resonator; an integrating unit which inputs a vibrating-state information signal as a characteristic amount indicative of a vibrating state of the vibrator from the MEMS resonator while the sweeping unit sweeps the frequency, integrates a plurality of the vibrating-state information signals at different frequencies of the excitation signal, and outputs the integrated value; and a conversion unit adapted to determine a pressure acting on the MEMS resonator, based on the integrated value.

Abstract: A piezoelectric sensing element includes a ring type piezoelectric device, two ceramic structural adhesives, two electrode sheets, two structural adhesives, a ring type sheet, and a disk-shaped cylindrical ceramic sheet. The two ceramic structural adhesives, respectively located above and below the ring type piezoelectric device. The two electrode sheets, respectively located above and below the two ceramic structural adhesives. The two structural adhesives, respectively located above and below the two electrode sheets. The ring type sheet, located above or below one of the two structural adhesives. The disk-shaped cylindrical ceramic sheet, located below or above another of the two structural adhesives.

Abstract: A hub for measuring the driving torque of a cycle wheel, the hub including a central shaft defining an axis of rotation of the wheel, and a hub body mounted to rotate freely about the shaft, the hub body including a central portion bordered on both sides by respective flanges, the flanges fastening at least one connecting element to connect the hub body to a rim of the wheel. The hub includes a system for measuring the driving torque of the wheel including strain gauges fixed on the hub body.

Abstract: A real time deflector monitoring system related to a deflector used in a seismic survey system is provided. The system includes a bridle block configured to connect the deflector to a first rope. The system further includes sensors embedded in the bridle block and configured to measure strength and direction of a tension in at least one of (A) the first rope and/or (B) one of rig ropes connecting the deflector to the bridle block. The system also includes a motion detector configured to acquire information related to deflector's motion.

Abstract: A personal items network, comprising a plurality of items, each item having a wireless communications port for coupling in network with every other item, each item having a processor for determining if any other item in the network is no longer linked to the item, each item having an indicator for informing a user that an item has left the network, wherein a user may locate lost items. A method for locating lost personal items, comprising: linking at least two personal items together on a network; and depositing one or both of time and location information in an unlost item when one of the items is lost out of network.

Abstract: The invention is directed to method for positioning and aligning a preferably biological sample in the detection area of the objective of a microscope arrangement. According to the invention, the method mentioned above has the following method steps: a sample is introduced into a transparent medium, preferably agarose gel, which is initially liquid; the medium is changed from the liquid state to the solid state, wherein the sample is fixated within the medium, but the transparency of the medium is retained; the solidified medium is positioned in the microscope arrangement in such a way that the sample enclosed therein is situated in the detection area of the objective. Further, a device is proposed for positioning and aligning a preferably biological sample in the detection area of the objective of a microscope arrangement.

Abstract: The invention provides material sampling devices and methods of using the material sampling devices. In a general aspect, the material sampling device includes a material sampling device including a rotator, an auger, and a sample containment tube. The rotator includes a rotating mechanism. The auger is attached to and rotatable by the rotating mechanism. A sample containment tube is constructed and arranged to receive the auger. The invention also provides kits useful for making the material sampling devices and using such material sampling devices for collecting and evaluating samples of a material.

Abstract: Aspects of the present disclosure describe an attachment device for mounting a module to a substrate comprises a module leg with two ends and a module foot. One end of the module leg is configured to be attached to a bottom surface of the module and the other end of the module leg is configured to be attached to the module foot. At least a portion of the module foot is configured to be attached to the substrate. Also a portion of a surface area of the module foot is configured to be exposed outside of an area covered by the module. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Abstract: Method for providing an assembly of an amount of used plastic material and an information carrier carrying data of at least one quality property of the amount of used plastic material, wherein providing the data of the at least one quality property comprises at least once: providing a predetermined amount of used plastic material; labelling the predetermined amount of used plastic material; and determining at least one quality property of the predetermined amount of used plastic material. A system for providing an assembly of an amount of used plastic material and data of at least one quality property of the amount of used plastic material, wherein the system comprises: a feeder for providing used plastic material; at least one quantity measuring system; a rheology measuring system; and an information carrier.

Abstract: A test head manipulator system comprising a base structure, a main arm unit configured to support a test head and to be moved relative to the base structure, an actuator having a range of motion of L, and an enhancement mechanism positioned between the main arm unit and the actuator and configured such that movement of the actuator a first distance causes the main arm unit to move a second distance that is greater than the first distance. Additionally, a fluid control system for controlling a test head manipulator system. The pneumatic control system includes a regulator configured to controllably provide an output pressure to the main fluid actuator, and a second fluidly controlled actuator configured to adjust the regulator to modify the output pressure provided to the main fluid actuator. The second actuator is configured to be positively positioned in at least four operating modes with each operating mode causing the regulator to provide a different output pressure to the main fluid actuator.

Abstract: A worktable sliding block positioning mechanism includes abuse member pivotally connected to a sliding block, a first clamping block affixed to the base member and defining a first clamping end that is disposed at one side relative to the worktable, a second clamping block pivotally connected to the base member and defining a second clamping end that is disposed at an opposite side relative to the worktable and opposite to the first clamping end, and a drive wheel pivotally connected to the base member and rotatable by an external force and defining a press portion that is pressed on the second clamping block to move the second clamping end toward the first clamping end of the first clamping block upon a rotary motion of the drive wheel. Thus, the worktable sliding block positioning mechanism avoids deformation or displacement of the sliding block during its positioning.

Abstract: An electromotive linear drive with a housing that is equipped with a drive unit, the output member of which is designed as linearly movable spindle nut that is operatively connected to a connecting part for connecting to another component. The spindle nut is engaged with the connecting part in the normal operating state by a first coupling part and a second coupling part engaged with said first coupling part, and the driving connection can be decoupled by a movement of at least one coupling part in the longitudinal direction of the spindle.

Abstract: A multi-clutch transmission for a motor vehicle with a prime mover has a main transmission, a range section and an output shaft, the main transmission including one input shaft, a main shaft and a main countershaft, the main shaft being rotationally fixed with a range input shaft of the range section, the range section including a range main shaft that is rotationally fixed with the output shaft, a range countershaft, range gearwheels that can selectively transfer power from the range input member to the range countershaft and on to the range main shaft, and range clutches, the multi-clutch transmission including a by-passing torque path in which power can be transferred when the range section is shifted, and where the by-passing torque path includes a by-passing clutch that selectively can rotationally lock the main countershaft to the range countershaft.

Abstract: A rack-and-pinion mechanism includes a first rack and a second rack, a first pinion and a second pinion, and a timing bar. Each of the racks includes a first set of teeth provided longitudinally therealong. Each of the first pinion and the second pinion includes a second set of teeth provided circumferentially therearound. The first pinion and the second pinion are configured to rotate along the first rack and the second rack respectively through engagement of the second set of teeth with the first set of teeth. The timing bar includes a first end and a second end. The first end and the second end are configured to be coupled to the first pinion and the second pinion respectively so that the first and second pinions rotate as one. The first pinion is configured to be movable with respect to the timing bar along a longitudinal axis of the timing bar.

Abstract: A driving device for driving in rotation a toothed wheel, in particular a turntable, has a worm intended to mesh with the toothed wheel, a motor to drive the worm in rotation, a flexible sleeve that partially surrounds the worm in such a way as to form an assembly described as a worm/sleeve assembly, and a pre-stressing unit. The motor is arranged in a structure that is fitted pivotably relative to the worm/sleeve assembly, and the driving device also has a force transfer unit connecting the motor to the sleeve at a second extremity of the worm.

Abstract: A two-far end supported actuator module for a snake robot using an inner wire includes: a module housing having a driving means and a reducer mounted therein, and having a plurality of accommodation portions on an outer surface thereof; an upper cover and a lower cover detachably installed at an upper part and a lower part of the module housing, respectively, wherein the upper cover has a rotation shaft passing hole for passing a rotation shaft therethrough, and the lower cover has a wire passing hole for passing a wire therethrough; a first connection bracket having one side coupled to one accommodation portion of the module housing, and another side coupled to a lower cover of another driving module, and configured to guide the wire thereinto; and a second connection bracket coupled to another accommodation portion of the module housing on the opposite side of the first connection bracket, and another side to which a rotation shaft is inserted to be supported.

Abstract: The present invention provides a torque-free robot arm, comprising: a base unit; and a first link in which one end is rotatably connected to the base unit to form a first joint as a rotary shaft horizontal to the ground and the center of gravity is separated from the first joint, wherein the first link includes one end arranged at the first joint, the other end arranged along the longitudinal direction of the first link, and a first counter balancer for compensating the gravity of the first link when the first link is rotated around the first joint.

Abstract: A trigger switch has a case member, a cover member, and an operation member configured to be used to carry out an operation. The case member and the cover member are combined with each other to form a waterproof case. When the operation member is operated, the operation member is displaced inward of the waterproof case. An internal pressure of the waterproof case changes in accordance with displacement of the operation member. The case member has a case base that is made from an inelastic body. The case base does not deform in accordance with a change in internal pressure of the waterproof case. The case base has at least one hole part. The case member has at least one deformation section that seals the at least one hole part. The deformation section is made from an elastic body.

Abstract: A dynamic damper device includes a damper mass device in which a damper mass is coupled by way of an elastic body to a rotation shaft of a power transmitting device capable of gear shifting a rotation power by a main transmission and transmitting the power to a drive wheel of a vehicle, and a damper transmission that is arranged on a power transmission path between the elastic body and the damper mass and that gear shifts the rotation power transmitted to the damper mass at a gear ratio corresponding to a gear ratio of the main transmission, wherein the damper mass device can accumulate the rotation power transmitted to the damper mass as inertia energy. Therefore, the dynamic damper device has an effect of achieving both reduction in vibration and improvement in fuel economy performance.