606 results about "Mechanical sensor" patented technology

Systems and methods are disclosed for assessing electrode-tissue contact for tissue ablation. An exemplary electrode contact sensing system comprises an electrode housed within a distal portion of a catheter shaft. At least one electro-mechanical sensor is operatively associated with the electrode within the catheter shaft. The at least one electro-mechanical sensor is responsive to movement of the electrode by generating electrical signals corresponding to the amount of movement. The system may also include an output device electrically connected to the at least one electro-mechanical sensor. The output device receives the electrical signals for assessing a level of contact between the electrode and a tissue.

A monitoring system has biomechanical sensors, physiological sensors and a controller which receive sensory inputs from the sensors to provide output signals for the output device, and it detects from the sensory inputs risk of a syncopal event The bio-mechanical sensors include sensors arranged to allow the processor to detect a user postures and posture transitions. The processor operates a finite state machine, in which there is a state corresponding to each of a plurality of user physical postures and to each of a plurality of transitions between said postures, and the processor determines a relevant state depending on the sensory inputs. A device output may be muscle stimulation to prevent syncope, and there are stimulation permissions associated with the finite state machine states.

The invention relates to an arrangement and a method for converting an input signal v into an output signal p(r_a) by using an electro-mechanical transducer and for reducing nonlinear total distortion p_d in said output signal p(r_a), whereas the nonlinear total distortion p_d contains multi-modal distortion u_d which are generated by nonlinear partial vibration of mechanical transducer components. An identification system generates distributed parameters P_d of a nonlinear wave model (N_d) and lumped parameters P_l of a network model (N_l) based on electrical, mechanical or acoustical state variables of transducer measured by a sensor. The nonlinear wave model distinguishes between activation modes and transfer modes, whereas the activation modes affect the transfer modes, which transfer the input signal u into the output signal p. A control system synthesizes based on the physical modeling and identified parameters P_d and P_l nonlinear distortion signals v_d and v_l which are supplied with the input signal v to the transducer and compensate for the distortion signals u_l and u_d generated by the transducer nonlinearities.

A non-contact infrared thermometer measures target temperatures remotely without requiring the ratio of the target size to the target distance to the thermometer. A collection means collects and focusses target IR radiation on an IR detector. The detector measures thermal energy of the target over a spectrum using micromechanical sensors. A processor means calculates the collected thermal energy in at least two different spectral regions using a first algorithm in program form and further calculates the ratio of the thermal energy in the at least two different spectral regions to obtain the target temperature independent of the target size, distance to the target and emissivity using a second algorithm in program form.

A system includes a plurality of actuators and a management system operably associated with the plurality electronic and mechanical devices. The management architecture includes interfaces configured to the entire electronics and mechanics to provide a parameter to a computer. The computer includes a control and management architecture using modular finite state flow designs configured to analyze the parameter. The computer with a plurality of finite state machines can conduct a plurality of control laws operably associated with one or more actuators for finite functions of mobility. The method includes matching the parameter with the finite state machine and controlling the actuator via control law operably associated with finite state machine. The method can therefore be achieved either manually, semi-autonomously and autonomously with seamless and switchless control using a central control computer with integration of electronic and mechanic sensors and devices.

A system for interpreting a gesture, comprises, preferably, at least one microelectronic mechanical sensor, which comprises a base suitable for being attached on a first position (such as a finger or a hand) of the human. A signal accumulating unit is connected to the sensor, and has another base suitable for being attached on a second position of the human. The signal accumulating unit comprises a logic for packing and/or interpreting the data about the gesture in a plurality of spaces sensing at one or more sensors. The signal accumulating unit also comprises a communication port for being communicated with a main computer, through which the interpreted data is transmitted to the main computer.

A device for determining a location of an interface between a first fluid and second fluid includes a non-mechanical sensor that measures a selected parameter of interest relating to the fluid surrounding the sensor (“the surrounding fluid”) and a processor for processing the sensor measurements. The non-mechanical sensor measures a parameter relating to the surround fluid without physically co-acting with the surrounding fluid. Exemplary parameters such as thermal properties, electrical properties, fluid properties, and magnetic properties can be measured. The processor is programmed to process the sensor measurements to identify one or more characteristics in the measurements that can indicate the nature of the fluid being measured and thereby determine the location of the interface. The determined location can be used to operate a downhole device such as a pump, to provide real-time monitoring of well conditions, to record data for long-term reservoir characterization, or to actuate an alarm.

The invention discloses a human motion information capturing system based on a micro-mechanical sensor. The human motion information capturing system comprises a plurality of sensor units, a main controller system and a data processing and graph rebuilding system, wherein the plurality of sensor units are used for obtaining motion posture data of every feature point position of the human body; the main controller system is used for performing processing on the basis of the human motion posture data obtained through a corresponding sensor network sensor unit and performing data transmission in a bluetooth module wireless pass-through mode; and the data processing and graph rebuilding system is provided with personal computer (PC) software and BVH files, can perform calculation according to the motion posture data obtained by processing through the main controller system and rebuilds a human motion posture model in real time. Every sensor unit, the main controller system and the data processing and graph rebuilding system are connected in sequence. Real-time data capturing of motion of the whole human body can be achieved in a wireless mode through the human motion information capturing system based on the micro-mechanical sensor, and the human motion information capturing system can be applied to motion control of virtual characters or robots in animations and games.

A method of fabricating a micro-mechanical sensor (101) comprising the steps for forming an insulating layer (6) onto the surface of a first wafer (4) bonding a second wafer (2) to the insulating layer (6), patterning and subsequently etching either the first (4) or second wafer (6) such that channels (18, 20) are created in either the first (2) or second (4) wafer terminating adjacent the insulating layer (6) and etching the insulating layer (6) to remove portions of the insulating layer (6) below the etched wafer such that those portions of the etched wafer below a predetermined cross section, suspended portions (22), become substantially freely suspended above the un-etched wafer. This method uses Silicon on Insulator technology. Also disclosed is a micro-mechanical gyroscope structure (101) allowing an anisotropic silicon to be used to fabricate a sensor functioning as if fabricated from isotropic silicon.

A neural monitoring device includes a stimulator configured to provide a stimulus, a mechanical sensor configured to generate an output signal corresponding to a sensed event, and a receiver configured to receive an output signal from the mechanical sensor and determine if the output signal corresponds to the stimulus provided by the stimulator.

The present invention provides an irrigation system with cheap humidity sensors and cheap automatic faucets preferably by using at the end nodes of the system low water pressure, so that much less force is needed to open and close the local waterway and then either using simple electrical valves that do not require engines, or using for example mechanical sensors based on a bi-material of two or more materials which expand differently when they become wet, thus converting the difference of the expansion into convenient movement. Another possible variation, instead of mechanical sensors and valves, is to use for example a preferably synthetic material that tends to behave like a normal root preferably at the edge of each side channel, so that the “root” counter-balances the water supply and reaches equilibrium with it when the soil becomes wet enough, based preferably on asymmetric capillary materials.

A reading book including a partially electronic page display provides a system and method for implementing interactive and/or animated books without the cost associated with typical electronic books, while retaining the multiple page features of a traditional printed book. The reading book may be a split-page design, where a portion of a reader's view is provided by a fixed electronic display, while a second portion is provided by a plurality of movable pages that may be recirculating electronic pages or printed pages. Alternatively or in concert, the reading book may include partial page areas implemented with electronic displays. Page selection via turning may be detected by optical, electronic or mechanical sensors and the display contents synchronized or activated in response to detected page turning activity.

The invention relates to measuring devices used in measuring angular velocity and, more precisely, to vibrating micro-mechanical sensors of angular velocity. The sensor of angular velocity according to the invention is adapted to measure angular velocity in relation to two or three axes, and at the least two seismic masses (34-36, 52-53, 71-75) of the sensor of angular velocity are adapted to be activated into primary motion vibration by means of a common mode. The structure of the sensor of angular velocity according to the invention enables reliable measuring with good performance, particularly in small size vibrating micro-mechanical sensors of angular velocity.

An extraction unit (10) for extracting cartridges (1a; 1b) of two different heights (ha;hb) comprises a seat (11, 12, 13; 15) for receiving any of such cartridges (1a; 1b) for extraction thereof in the seat. The seat is delimited by a first part (11,12,13) and second part (15) that are relatively movable between a cartridge extraction position and a cartridge loading and/or ejection position. The first part (11,12,13) has a first portion (11,12) and a second portion (13) that are relatively movable to delimit a cavity (12′) having selectively: —a first depth (da) for receiving a cartridge (1a) of the first height (ha); and—a second depth (db) for receiving a cartridge (1b) of the second height (hb), the first part (11,12,13) has a lock (112′, 132, 132′, 142′) for locking the first and second portions (11,12,13) when the delimited cavity (12′) has the first depth (da) or the second depth (db). Such extraction unit (10) further comprises a mechanical sensor (14) that senses the height (ha;hb) of a cartridge (1a; 1b) and that controls the lock (112′, 132, 132′, 142′) to lock or unlock the first and second portions (11,12,13) when the sensor is actuated by a cartridge of first height (ha) or of second height (hb).

The pulse analysis is one of the important measures for Chinese medicine diagnosis. Doctor can understand the health condition of patient based on pulse condition of radial artery of the patient. The present invention provides blood pressure measuring method based on radial artery pulse information. The method includes detecting the pulse wave of radial artery in wrist with one mechanical sensor and detecting electrocardiac signal with two conducting electrode, and then determining artery blood pressure based on the time information extracted from these two signals. The device is calibrated with standard sphygmomanometer before used in continuous measurement of artery blood pressure without using sleeve belt.

The invention relates to measuring devices used in measuring angular velocity, and, more specifically, to oscillating micro-mechanical sensors of angular velocity. In the sensor of angular velocity according to the present invention seismic masses (1), (2), (36), (37) are connected to support areas by means of springs or by means of springs and stiff auxiliary structures, which give the masses (1), (2), (36), (37) a degree of freedom in relation to an axis of rotation perpendicular to the plane of the wafer formed by the masses, and in relation to at least one axis of rotation parallel to the plane of the wafer. The structure of the sensor of angular velocity according to the present invention enables reliable and efficient measuring particularly in compact oscillating micro-mechanical sensors of angular velocity.

The invention relates to a micron-nano scale in-situ nano indentation and scratching test system which integrates driving, precise loading and signal detection, micron-nano scale mechanics performance testing, ultraprecise scratching processing and high resolution in-situ observing as one. The system is mainly composed of a precise positioning platform at X-axis and Y-axis directions, a precise linear positioning platform at Z-axis direction, a precise indentation driving unit, a load signal and displacement signal detection unit and a high resolution digital microscopic imaging system for observing and storing material deformation and damage conditions in the test process. The precise positioning platform at the X-axis and Y-axis directions is assembled on a base, the precise linear positioning platform at the Z-axis direction is assembled on a side plate, the precise indentation driving unit, a precise mechanical sensor for detecting the indentation material pressure of a diamond tool head and a precise displacement sensor for detecting the indentation depth of the diamond tool head to along the Z-axis direction are assembled on the precise linear positioning platform at the Z-axis direction, and the high resolution digital microscopic imaging system is assembled on a beam.

The invention discloses an unposition sensor for a permanent magnet linear motor. Before a motor starts, a designated trigger signal is inputted into an inverter, a corresponding line inductance value is solved, the calculation is realized by combining the existing inductive parameters of the motor for preliminarily obtaining an initial position of a linear servo motor and then high-frequency voltage is immediately introduced to judge the direction of a magnetic pole of the rotor; after the motor starts, the position of the rotor is detected at the low-speed phase in real time by a method of combining the injection of the high-frequency voltage with the repetition of a controller; position information of the rotor is acquired at the middle-high speed phases in real time by a method of combining a sliding-mode observer based on an extended counter electromotive force model with a saturation function algorithm. According to the unposition sensor disclosed by the invention, an initial position detection method, a rotating high-frequency injection method, repeated control and the sliding-mode observer are combined together, so that the position information of the linear servo motor can be accurately and effectively detected, the defects caused by the existence of a mechanical sensor are overcome and the reliability of the system is improved.

The invention relates to a novel flexible mechanical sensor which consists of a nanofiber film layer and a conductive film electrode layer. The nanofiber film layer is made of piezoelectric material polyvinylidene fluoride or polyvinylidene fluoride-fluoro-olefine copolymer, and the molar weight of the polyvinylidene fluoride in the polyvinylidene fluoride-fluoro-olefine copolymer is 55-85% and is preferably 70-80%. The invention further provides a preparation method of the flexible mechanical sensor.